1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * Add _SC_MINSIGSTKSZ and _SC_SIGSTKSZ. When _SC_SIGSTKSZ_SOURCE or
13 _GNU_SOURCE are defined, MINSIGSTKSZ and SIGSTKSZ are no longer
14 constant on Linux. MINSIGSTKSZ is redefined to sysconf(_SC_MINSIGSTKSZ)
15 and SIGSTKSZ is redefined to sysconf (_SC_SIGSTKSZ).
17 * The dynamic linker implements the --list-diagnostics option, printing
18 a dump of information related to IFUNC resolver operation and
19 glibc-hwcaps subdirectory selection.
21 * On Linux, the function execveat has been added. It operates similar to
22 execve and it is is already used to implement fexecve without requiring
23 /proc to be mounted. However, different than fexecve, if the syscall is not
24 supported by the kernel an error is returned instead of trying a fallback.
26 * The ISO C2X function timespec_getres has been added.
28 * The feature test macro __STDC_WANT_IEC_60559_EXT__, from draft ISO
29 C2X, is supported to enable declarations of functions defined in Annex F
30 of C2X. Those declarations are also enabled when
31 __STDC_WANT_IEC_60559_BFP_EXT__, as specified in TS 18661-1, is
32 defined, and when _GNU_SOURCE is defined.
34 * On powerpc64*, glibc can now be compiled without scv support using the
35 --disable-scv configure option.
37 * Add support for 64-bit time_t for ABIs with defaults to 32-bit time_t.
38 This is enabled with the _TIME_BITS preprocessor set to 64 and only
39 supported when LFS (_FILE_OFFSET_BITS=64) is also enabled. It is only
40 enabled for Linux and the full support requires a minimum version of 5.1.
42 * The main gconv-modules file in glibc now contains only a small set of
43 essential converter modules and the rest have been moved into a supplementary
44 configuration file gconv-modules-extra.conf in the gconv-modules.d directory
45 in the same GCONV_PATH. Similarly, external converter modules directories
46 may have supplementary configuration files in a gconv-modules.d directory
47 with names ending with .conf to logically classify the converter modules in
50 Deprecated and removed features, and other changes affecting compatibility:
52 * The function pthread_mutex_consistent_np has been deprecated; programs
53 should use the equivalent standard function pthread_mutex_consistent
56 * The function pthread_mutexattr_getrobust_np has been deprecated;
57 programs should use the equivalent standard function
58 pthread_mutexattr_getrobust instead.
60 * The function pthread_mutexattr_setrobust_np has been deprecated;
61 programs should use the equivalent standard function
62 pthread_mutexattr_setrobust instead.
64 * The function pthread_yield has been deprecated; programs should use
65 the equivalent standard function sched_yield instead.
67 Changes to build and runtime requirements:
69 * On Linux, the shm_open, sem_open, and related functions now expect the
70 file shared memory file system to be mounted at /dev/shm. These functions
71 no longer search among the system's mount points for a suitable
72 replacement if /dev/shm is not available.
74 Security related changes:
76 CVE-2021-27645: The nameserver caching daemon (nscd), when processing
77 a request for netgroup lookup, may crash due to a double-free,
78 potentially resulting in degraded service or Denial of Service on the
79 local system. Reported by Chris Schanzle.
81 CVE-2021-33574: The mq_notify function has a potential use-after-free
82 issue when using a notification type of SIGEV_THREAD and a thread
83 attribute with a non-default affinity mask.
85 The following bugs are resolved with this release:
87 [The release manager will add the list generated by
88 scripts/list-fixed-bugs.py just before the release.]
95 * The dynamic linker accepts the --list-tunables argument which prints
96 all the supported tunables. This option is disable if glibc is
97 configured with tunables disabled (--enable-tunables=no).
99 * The dynamic linker accepts the --argv0 argument and provides opportunity
100 to change argv[0] string.
102 * The dynamic linker loads optimized implementations of shared objects
103 from subdirectories under the glibc-hwcaps directory on the library
104 search path if the system's capabilities meet the requirements for
105 that subdirectory. Initially supported subdirectories include
106 "power9" and "power10" for the powerpc64le-linux-gnu architecture,
107 "z13", "z14", "z15" for s390x-linux-gnu, and "x86-64-v2", "x86-64-v3",
108 "x86-64-v4" for x86_64-linux-gnu. In the x86_64-linux-gnu case, the
109 subdirectory names correspond to the vendor-independent x86-64
110 microarchitecture levels defined in the x86-64 psABI supplement.
112 * The new --help option of the dynamic linker provides usage and
113 information and library search path diagnostics.
115 * The mallinfo2 function is added to report statistics as per mallinfo,
116 but with larger field widths to accurately report values that are
117 larger than fit in an integer.
119 * Add <sys/platform/x86.h> to provide query macros for x86 CPU features.
121 * Support for the RISC-V ISA running on Linux has been expanded to run on
122 32-bit hardware. This is supported for the following ISA and ABI pairs:
128 The 32-bit RISC-V port requires at least Linux 5.4, GCC 7.1 and binutils
131 * A new fortification level _FORTIFY_SOURCE=3 is available. At this level,
132 glibc may use additional checks that may have an additional performance
133 overhead. At present these checks are available only on LLVM 9 and later.
134 The latest GCC available at this time (10.2) does not support this level of
137 Deprecated and removed features, and other changes affecting compatibility:
139 * The mallinfo function is marked deprecated. Callers should call
142 * When dlopen is used in statically linked programs, alternative library
143 implementations from HWCAP subdirectories are no longer loaded.
144 Instead, the default implementation is used.
146 * The deprecated <sys/vtimes.h> header and the function vtimes have been
147 removed. To support old binaries, the vtimes function continues to exist
148 as a compatibility symbol. Applications should use the getrlimit or
151 * Following a change in the tzdata 2018a release upstream, the zdump
152 program is now installed in the /usr/bin subdirectory. Previously,
153 the /usr/sbin subdirectory was used.
155 * On s390(x), the type float_t is now derived from the macro
156 __FLT_EVAL_METHOD__ that is defined by the compiler, instead of being
157 hardcoded to double. This does not affect the ABI of any libraries
158 that are part of the GNU C Library, but may affect the ABI of other
159 libraries that use this type in their interfaces. The new definition
160 improves consistency with compiler behavior in many scenarios.
162 * A future version of glibc will stop loading shared objects from the
163 "tls" subdirectories on the library search path, the subdirectory that
164 corresponds to the AT_PLATFORM system name, and also stop employing
165 the legacy AT_HWCAP search mechanism. Applications should switch to
166 the new glibc-hwcaps mechanism instead; if they do not do that, only
167 the baseline version (directly from the search path directory) will be
170 Changes to build and runtime requirements:
172 * On Linux, the system administrator needs to configure /dev/pts with
173 the intended access modes for pseudo-terminals. glibc no longer
174 attemps to adjust permissions of terminal devices. The previous glibc
175 defaults ("tty" group, user read/write and group write) already
176 corresponded to what most systems used, so that grantpt did not
177 perform any adjustments.
179 * On Linux, the posix_openpt and getpt functions no longer attempt to
180 use legacy (BSD) pseudo-terminals and assume that if /dev/ptmx exists
181 (and pseudo-terminals are supported), a devpts file system is mounted
182 on /dev/pts. Current systems already meet these requirements.
184 * s390x requires GCC 7.1 or newer. See gcc Bug 98269.
186 Security related changes:
188 CVE-2021-3326: An assertion failure during conversion from the
189 ISO-20220-JP-3 character set using the iconv function has been fixed.
190 This assertion was triggered by certain valid inputs in which the
191 converted output contains a combined sequence of two wide characters
192 crossing a buffer boundary. Reported by Tavis Ormandy.
194 CVE-2020-27618: An infinite loop has been fixed in the iconv program when
195 invoked with input containing redundant shift sequences in the IBM1364,
196 IBM1371, IBM1388, IBM1390, or IBM1399 character sets.
198 CVE-2020-29562: An assertion failure has been fixed in the iconv function
199 when invoked with UCS4 input containing an invalid character.
201 CVE-2019-25013: A buffer overflow has been fixed in the iconv function when
202 invoked with EUC-KR input containing invalid multibyte input sequences.
204 The following bugs are resolved with this release:
206 [10635] libc: realpath portability patches
207 [16124] dynamic-link: ld.so should allow to change argv[0]
208 [17924] malloc: 'free' should not set errno
209 [18683] libc: Linux faccessat implementation can incorrectly ignore
211 [22899] libc: Use 64-bit readdir() in generic POSIX getcwd()
212 [23091] hurd: missing waitid support
213 [23249] libc: Epyc and other current AMD CPUs do not select the
214 "haswell" platform subdirectory
215 [24080] dynamic-link: Definition of "haswell" platform is inconsistent
217 [24202] libc: m68k setjmp() saves incorrect 'a5' register in --enable-
219 [24941] libc: Make grantpt usable after multi-threaded fork in more
221 [24970] libc: realpath mishandles EOVERFLOW; stat not needed anyway
222 [24973] locale: iconv encounters segmentation fault when converting
223 0x00 0xfe in EUC-KR to UTF-8 (CVE-2019-25013)
224 [25399] string: undefined reference to `__warn_memset_zero_len' when
225 changing gnuc version
226 [25859] libc: glibc parser for /sys/devices/system/cpu/online is
228 [25938] dynamic-link: ld.so.cache should store meaning of hwcap mask
230 [25971] libc: s390 bits/hwcap.h out of sync with kernel
231 [26053] libc: unlockpt fails with ENOTTY for non-ptmx descriptors
232 [26100] libc: Race in syslog(3) with regards to tag printing.
233 [26124] libc: Export <cpu-features.h>
234 [26130] nscd: Inconsistent nscd cache during pruning
235 [26203] libc: GLRO(dl_x86_cpu_features) may not be intialized
236 [26224] locale: iconv hangs when converting some invalid inputs from
237 several IBM character sets (CVE-2020-27618)
238 [26341] libc: realpath cyclically call __alloca(path_max) to consume
240 [26343] manual: invalid documented return type for strerrorname_np(),
241 strerrordesc_np(), sigdescr_np(), sigabbrev_np()
242 [26376] libc: Namespace violation in stdio.h and sys/stat.h if build
244 [26383] locale: bind_textdomain_codeset doesn't accept //TRANSLIT
246 [26394] time: [2.33 Regression] FAIL: nptl/tst-join14
247 [26534] math: libm.so 2.32 SIGILL in pow() due to FMA4 instruction on
249 [26552] dynamic-link: CPU_FEATURE_USABLE_P should be more conservative
250 [26553] libc: mtx_init allows type set to "mtx_recursive" only
251 [26555] string: strerrorname_np does not return the documented value
252 [26592] libc: pointer arithmetic overflows in realpath
253 [26600] network: Transaction ID collisions cause slow DNS lookups in
255 [26606] libc: [2.33 Regression] pselect is broken on x32
256 [26615] libc: powerpc: libc segfaults when LD_PRELOADed with libgcc
257 [26620] glob: fnmatch with collating symbols results in segmentation
259 [26625] libc: [2.33 Regression] CET is disabled
260 [26636] libc: 32-bit shmctl(IPC_INFO) crashes when shminfo struct is
261 at the end of a memory mapping
262 [26637] libc: semctl SEM_STAT_ANY fails to pass the buffer specified
263 by the caller to the kernel
264 [26639] libc: msgctl IPC_INFO and MSG_INFO return garbage
265 [26647] build: [-Werror=array-parameter=] due to different
266 declarations for __sigsetjmp
267 [26648] libc: mkstemp is likely to fail on systems with non-stricly-
269 [26649] stdio: printf should handle non-normal x86 long double numbers
270 gracefully (CVE-2020-29573)
271 [26686] build: -Warray-parameter instances building with GCC 11
272 [26687] build: -Warray-bounds instances building with GCC 11
273 [26690] stdio: Aliasing violation in __vfscanf_internal
274 [26691] nptl: Use a minimum guard size of 64 KiB on aarch64
275 [26726] build: GCC warning calling new_composite_name with an array of
277 [26736] libc: FAIL: misc/tst-sysvshm-linux
278 [26737] libc: Random FAIL: rt/tst-shm
279 [26791] libc: Missing O_CLOEXEC in sysconf.c
280 [26798] dynamic-link: aarch64: variant PCS symbols may be incorrectly
282 [26801] nptl: pthread_mutex_clocklock with CLOCK_MONOTONIC can fail on
284 [26818] string: aarch64: string tests may run ifunc variants that are
286 [26821] libc: Memory leak test failures on Fedora 33
287 [26824] libc: FAIL: elf/tst-cpu-features-supports with recent trunk:
288 FSGSBASE/LM/RDRAND check failure
289 [26833] time: adjtime() with delta == NULL segfaults on armv7 32bit
291 [26853] libc: aarch64: Missing unwind information in statically linked
293 [26923] locale: Assertion failure in iconv when converting invalid
294 UCS4 (CVE-2020-29562)
295 [26926] dynamic-link: aarch64: library dependencies are not bti
297 [26932] libc: sh: Multiple floating point functions defined as stubs
299 [26964] nptl: pthread_mutex_timedlock returning EAGAIN after futex is
301 [26988] dynamic-link: aarch64: BTI mprotect address is not page
303 [27002] build: libc_freeres_fn build failure with GCC 11
304 [27004] dynamic-link: ld.so is miscompiled by GCC 11
305 [27008] dynamic-link: ld.so.cache should have endianness markup
306 [27042] libc: [alpha] anonymous union in struct stat confuses
308 [27053] libc: Conformance regression in system(3) (and probably also
310 [27072] dynamic-link: static pie ifunc resolvers run before hwcap is
312 [27077] network: Do not reload /etc/nsswitch.conf from chroot
313 [27083] libc: Unsafe unbounded alloca in addmntent
314 [27104] dynamic-link: The COMMON_CPUID_INDEX_MAX handshake does not
316 [27130] string: "rep movsb" performance issue
317 [27150] libc: alpha: wait4() is unavailable in static linking
318 [27177] dynamic-link:
319 GLIBC_TUNABLES=glibc.cpu.x86_ibt=on:glibc.cpu.x86_shstk=on doesn't
321 [27222] dynamic-link: Incorrect sysdeps/x86/tst-cpu-features-cpuinfo.c
322 [27237] malloc: deadlock in malloc/tst-malloc-stats-cancellation
323 [27256] locale: Assertion failure in ISO-2022-JP-3 gconv module
324 related to combining characters (CVE-2021-3326)
331 * Unicode 13.0.0 Support: Character encoding, character type info, and
332 transliteration tables are all updated to Unicode 13.0.0, using
333 generator scripts contributed by Mike FABIAN (Red Hat).
335 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
337 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
338 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
339 Three ABIs are supported:
345 The arc* ABIs are little-endian while arceb is big-endian. All ABIs use
346 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
348 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
349 DT_DEPAUDIT dynamic section entries of the main executable.
351 * powerpc64le supports IEEE128 long double libm/libc redirects when
352 using -mabi=ieeelongdouble to compile C code on supported GCC
353 toolchains. It is recommended to use GCC 8 or newer when testing
356 * To help detect buffer overflows and other out-of-bounds accesses
357 several APIs have been annotated with GCC 'access' attribute. This
358 should help GCC 10 issue better warnings.
360 * On Linux, functions pthread_attr_setsigmask_np and
361 pthread_attr_getsigmask_np have been added. They allow applications
362 to specify the signal mask of a thread created with pthread_create.
364 * The GNU C Library now provides the header file <sys/single_threaded.h>
365 which declares the variable __libc_single_threaded. Applications are
366 encouraged to use this variable for single-thread optimizations,
367 instead of weak references to symbols historically defined in
370 * The functions sigabbrev_np and sigdescr_np have been added. The
371 sigabbrev_np function returns the abbreviated signal name (e.g. "HUP" for
372 SIGHUP) while sigdescr_np returns a string describing the signal number
373 (e.g "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
374 attempt to translate the return description, both functions return
375 NULL for an invalid signal number.
377 They should be used instead of sys_siglist or sys_sigabbrev and they
378 are both thread and async-signal safe. These functions are GNU extensions.
380 * The functions strerrorname_np and strerrordesc_np have been added. The
381 strerroname_np function returns error number name (e.g. "EINVAL" for EINVAL)
382 while strerrordesc_np returns a string describing the error number
383 (e.g "Invalid argument" for EINVAL). Different than strerror,
384 strerrordesc_np does not attempt to translate the return description, both
385 functions return NULL for an invalid error number.
387 They should be used instead of sys_errlist and sys_nerr, both are
388 thread and async-signal safe. These functions are GNU extensions.
390 * AArch64 now supports standard branch protection security hardening
391 in glibc when it is built with a GCC that is configured with
392 --enable-standard-branch-protection (or if -mbranch-protection=standard
393 flag is passed when building both GCC target libraries and glibc,
394 in either case a custom GCC is needed). This includes branch target
395 identification (BTI) and pointer authentication for return addresses
396 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
397 extensions respectively for the protection to be effective,
398 otherwise the used instructions are nops. User code can use PAC-RET
399 without libc support, but BTI requires a libc that is built with BTI
400 support, otherwise runtime objects linked into user code will not be
403 Deprecated and removed features, and other changes affecting compatibility:
405 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
406 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
407 RPC header files. Backward compatibility for old programs is kept
408 only for architectures and ABIs that have been added in or before
409 glibc 2.31. New programs need to use TI-RPC
410 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
411 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
413 * Remove configure option --enable-obsolete-nsl. libnsl is only built
414 as shared library for backward compatibility and the NSS modules "nis"
415 and "nisplus" are not built at all and libnsl's headers aren't
416 installed. This compatibility is kept only for architectures and ABIs
417 that have been added in or before version 2.28. Replacement
418 implementations based on TI-RPC, which additionally support IPv6, are
419 available from <https://github.com/thkukuk/>. This change does not
420 affect the "compat" NSS module, which does not depend on libnsl
421 since 2.27 and thus can be used without NIS.
423 * The deprecated <sys/sysctl.h> header and the sysctl function have been
424 removed. To support old binaries, the sysctl function continues to
425 exist as a compatibility symbol (on those architectures which had it),
426 but always fails with ENOSYS. This reflects the removal of the system
427 call from all architectures, starting with Linux 5.5.
429 * The sstk function is no longer available to newly linked binaries.
430 Its implementation always returned with a failure, and the function
431 was not declared in any header file.
433 * The legacy signal handling functions siginterrupt, sigpause, sighold,
434 sigrelse, sigignore and sigset, and the sigmask macro have been
435 deprecated. Applications should use the sigsuspend, sigprocmask and
436 sigaction functions instead.
438 * ldconfig now defaults to the new format for ld.so.cache. glibc has
439 already supported this format for almost 20 years.
441 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
442 are no longer available to newly linked binaries, and their declarations
443 have been removed from <string.h>. They are exported solely as
444 compatibility symbols to support old binaries. All programs should use
447 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
448 are no longer available to newly linked binaries, and their declarations
449 have been removed from <stdio.h>. They are exported solely as
450 compatibility symbols to support old binaries. All programs should use
451 strerror or strerror_r instead.
453 * Both strerror and strerror_l now share the same internal buffer in the
454 calling thread, meaning that the returned string pointer may be invalided
455 or contents might be overwritten on subsequent calls in the same thread or
456 if the thread is terminated. It makes strerror MT-safe.
458 * Using weak references to libpthread functions such as pthread_create
459 or pthread_key_create to detect the singled-threaded nature of a
460 program is an obsolescent feature. Future versions of glibc will
461 define pthread_create within libc.so.6 itself, so such checks will
462 always flag the program as multi-threaded. Applications should check
463 the __libc_single_threaded variable declared in
464 <sys/single_threaded.h> instead.
466 * The "files" NSS module no longer supports the "key" database (used for
467 secure RPC). The contents of the /etc/publickey file will be ignored,
468 regardless of the settings in /etc/nsswitch.conf. (This method of
469 storing RPC keys only supported the obsolete and insecure AUTH_DES
470 flavor of secure RPC.)
472 * The __morecore and __after_morecore_hook malloc hooks and the default
473 implementation __default_morecore have been deprecated. Applications
474 should use malloc interposition to change malloc behavior, and mmap to
475 allocate anonymous memory. A future version of glibc may require that
476 applications which use the malloc hooks must preload a special shared
477 object, to enable the hooks.
479 * The hesiod NSS module has been deprecated and will be removed in a
480 future version of glibc. System administrators are encouraged to
481 switch to other approaches for networked account databases, such as
484 Changes to build and runtime requirements:
486 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
487 long double redirects.
489 Security related changes:
491 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
492 invoked with the -c option and when processing invalid multi-byte input
493 sequences. Reported by Jan Engelhardt.
495 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
496 corruption when they were passed a pseudo-zero argument. Reported by Guido
497 Vranken / ForAllSecure Mayhem.
499 CVE-2020-1752: A use-after-free vulnerability in the glob function when
500 expanding ~user has been fixed.
502 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
503 memmove functions has been fixed. Discovered by Jason Royes and Samual
504 Dytrych of the Cisco Security Assessment and Penetration Team (See
507 The following bugs are resolved with this release:
509 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
510 [10441] manual: Backtraces code example lacks error checking
511 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
512 timer_sigev_thread dangerous
513 [14231] stdio: stdio-common tests memory requirements
514 [14578] libc: /proc-based emulation for lchmod, fchmodat
515 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
516 filtee has constructor
517 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
518 sequences (CVE-2016-10228)
519 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
520 character entities for infinity & pi
521 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
522 segfaults in applications
523 [20543] libc: Please move from .gnu.linkonce to comdat
524 [22489] network: gcc warns about implicit convertion in
525 ICMP6_FILTER_SETPASS with -Wsign-conversion
526 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
527 [23294] math: Complex _FloatN functions are redirected to the wrong
528 function with -mlong-double-64
529 [23296] libc: Data race in setting function descriptor during lazy
531 [23668] dynamic-link: ldconfig: Default to the new format for
533 [23819] hurd: hurd: Add C11 thread support
534 [23990] build: test-container error out on failure to exec child.
535 [23991] build: shell-container typo in run_command_array
536 [24638] manual: Error in example of parsing a template string
537 [24654] manual: Wrong declaration of wcschr in libc manual
538 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
540 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
541 dynamically loaded dsos
542 [25098] nptl: nptl: ctype classification functions are not AS-Safe
543 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
545 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
546 restore EAX, ECX and EDX
547 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
548 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
549 [25420] network: Race condition in resolv_conf.c can result in caching
550 stale configuration forever
551 [25487] math: sinl() stack corruption from crafted input
553 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
555 [25523] libc: MIPS/Linux inline syscall template is miscompiled
556 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
558 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
559 on 32 bit and old kernel
560 [25635] libc: arm: Wrong sysdep order selection for soft-fp
561 [25639] localedata: Some names of days and months wrongly spelt in
563 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
564 amount of sigset_t bytes
565 [25691] stdio: printf: memory leak when printing long multibyte
567 [25715] libc: system() returns wrong errors when posix_spawn fails
568 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
569 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
570 state for conversions that produce two Unicode code points
571 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
572 for linux x86_64 leads to livelock
573 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
574 test failures, invalid instruction in ld.so
575 [25790] glob: Typo in tst-fnmatch.input
576 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
578 [25819] localedata: Update locale data to Unicode 13.0.0
579 [25824] libc: Abnormal function of strnlen in aarch64
580 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
581 [25896] libc: Incorrect prctl
582 [25902] libc: Bad LOADARGS_N
583 [25905] dynamic-link: VSX registers are corrupted during PLT
584 resolution when glibc is built with --disable-multi-arch and --with-
586 [25933] string: Off by one error in __strncmp_avx2 when
587 length=VEC_SIZE*4 and strings are at page boundaries can cause a
589 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
590 exiting detached thread
591 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
593 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
595 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
596 [26073] math: getpayload() has wrong return value
597 [26076] dynamic-link: dlmopen crashes after failing to load
598 dependencies in audit mode
599 [26120] localedata: column width of of some Korean
600 JUNGSEONG/JONGSEONG characters wrong (should be 0)
601 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
602 [26133] libc: Incorrect need_arch_feature_F16C
603 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
605 [26149] libc: PKU is usable only if OSPKE is set
606 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
608 [26208] libc: Incorrect bit_cpu_CLFSH
609 [26210] network: Incorrect use of hidden symbols for global sunrpc
611 [26211] stdio: printf integer overflow calculating allocation size
612 [26214] stdio: printf_fp double free
613 [26215] stdio: printf_fp memory leak
614 [26232] time: FAIL: support/tst-timespec for 32-bit targets
615 [26258] nss: nss_compat should not read input files with mmap
616 [26332] string: Incorrect cache line size load causes memory
624 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
625 enable features from the draft ISO C2X standard. Only some features from
626 this draft standard are supported by the GNU C Library, and as the draft
627 is under active development, the set of features enabled by this macro is
628 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
629 by compiling with "gcc -std=gnu2x".
631 * The <math.h> functions that round their results to a narrower type now
632 have corresponding type-generic macros in <tgmath.h>, as defined in TS
633 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
634 Clarification Request 13 to TS 18661-3.
636 * The function pthread_clockjoin_np has been added, enabling join with a
637 terminated thread with a specific clock. It allows waiting against
638 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
640 * New locale added: mnw_MM (Mon language spoken in Myanmar).
642 * The DNS stub resolver will optionally send the AD (authenticated data) bit
643 in queries if the trust-ad option is set via the options directive in
644 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
645 mode, the AD bit, as provided by the name server, is available to
646 applications which call res_search and related functions. In the default
647 mode, the AD bit is not set in queries, and it is automatically cleared in
648 responses, indicating a lack of DNSSEC validation. (Therefore, the name
649 servers and the network path to them are treated as untrusted.)
651 Deprecated and removed features, and other changes affecting compatibility:
653 * The totalorder and totalordermag functions, and the corresponding
654 functions for other floating-point types, now take pointer arguments to
655 avoid signaling NaNs possibly being converted to quiet NaNs in argument
656 passing. This is in accordance with the resolution of Clarification
657 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
658 floating-point arguments directly will continue to work.
660 * The obsolete function stime is no longer available to newly linked
661 binaries, and its declaration has been removed from <time.h>.
662 Programs that set the system time should use clock_settime instead.
664 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
665 in a future version of glibc. In this release, the header still exists
666 but calling ftime will cause a compiler warning. All programs should use
667 gettimeofday or clock_gettime instead.
669 * The gettimeofday function no longer reports information about a
670 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
671 many years, as it cannot handle the full complexity of the world's
672 timezones, but hitherto we have supported it on a best-effort basis.
673 Changes required to support 64-bit time_t on 32-bit architectures have
674 made this no longer practical.
676 As of this release, callers of gettimeofday with a non-null 'tzp' argument
677 should expect to receive a 'struct timezone' whose tz_minuteswest and
678 tz_dsttime fields are zero. (For efficiency reasons, this does not always
679 happen on a few Linux-based ports. This will be corrected in a future
682 All callers should supply a null pointer for the 'tzp' argument to
683 gettimeofday. For accurate information about the time zone associated
684 with the current time, use the localtime function.
686 gettimeofday itself is obsolescent according to POSIX. We have no plans
687 to remove access to this function, but portable programs should consider
688 using clock_gettime instead.
690 * The settimeofday function can still be used to set a system-wide time
691 zone when the operating system supports it. This is because the Linux
692 kernel reused the API, on some architectures, to describe a system-wide
693 time-zone-like offset between the software clock maintained by the kernel,
694 and the "RTC" clock that keeps time when the system is shut down.
696 However, to reduce the odds of this offset being set by accident,
697 settimeofday can no longer be used to set the time and the offset
698 simultaneously. If both of its two arguments are non-null, the call
699 will fail (setting errno to EINVAL).
701 Callers attempting to set this offset should also be prepared for the call
702 to fail and set errno to ENOSYS; this already happens on the Hurd and on
703 some Linux architectures. The Linux kernel maintainers are discussing a
704 more principled replacement for the reused API. After a replacement
705 becomes available, we will change settimeofday to fail with ENOSYS on all
706 platforms when its 'tzp' argument is not a null pointer.
708 settimeofday itself is obsolescent according to POSIX. Programs that set
709 the system time should use clock_settime and/or the adjtime family of
710 functions instead. We may cease to make settimeofday available to newly
711 linked binaries after there is a replacement for Linux's time-zone-like
714 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
715 the optional CAS instruction is implemented (for instance, LEON processors
716 are still supported, but SuperSPARC processors are not).
718 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
721 * If a lazy binding failure happens during dlopen, during the execution of
722 an ELF constructor, the process is now terminated. Previously, the
723 dynamic loader would return NULL from dlopen, with the lazy binding error
724 captured in a dlerror message. In general, this is unsafe because
725 resetting the stack in an arbitrary function call is not possible.
727 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
728 executable stack unless explicitly configured at build time to require
729 minimum kernel version 4.8 or newer. This is because executing
730 floating-point branches on a non-executable stack on Linux kernels prior to
731 4.8 can lead to application crashes for some MIPS configurations. While
732 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
733 expected to enable non-executable stack by default with PT_GNU_STACK by
734 default and is thus likely to trigger a crash on older kernels.
736 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
737 non-executable stack while dropping support for older kernels.
739 * System call wrappers for time system calls now use the new time64 system
740 calls when available. On 32-bit targets, these wrappers attempt to call
741 the new system calls first and fall back to the older 32-bit time system
742 calls if they are not present. This may cause issues in environments
743 that cannot handle unsupported system calls gracefully by returning
744 -ENOSYS. Seccomp sandboxes are affected by this issue.
746 Changes to build and runtime requirements:
748 * It is no longer necessary to have recent Linux kernel headers to build
749 working (non-stub) system call wrappers on all architectures except 64-bit
750 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
752 * The ChangeLog file is no longer present in the toplevel directory of the
753 source tree. ChangeLog files are located in the ChangeLog.old directory as
754 ChangeLog.N where the highest N has the latest entries.
756 Security related changes:
758 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
759 out-of-bounds write when executed in a signal frame context.
761 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
762 environment variable during program execution after a security
763 transition, allowing local attackers to restrict the possible mapping
764 addresses for loaded libraries and thus bypass ASLR for a setuid
765 program. Reported by Marcin Kościelnicki.
767 The following bugs are resolved with this release:
769 [12031] localedata: iconv -t ascii//translit with Greek characters
770 [15813] libc: Multiple issues in __gen_tempname
771 [17726] libc: [arm, sparc] profil_counter should be compat symbol
772 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
773 [19767] libc: vdso is not used with static linking
774 [19903] hurd: Shared mappings not being inherited by children processes
775 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
776 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
778 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
779 Symbols-A/B Unicode blocks
780 [23518] libc: Eliminate __libc_utmp_jump_table
781 [24026] malloc: malloc_info() returns wrong numbers
782 [24054] localedata: Many locales are missing date_fmt
783 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
784 [24304] dynamic-link: Lazy binding failure during ELF
785 constructors/destructors is not fatal
786 [24376] libc: RISC-V symbol size confusion with _start
787 [24682] localedata: zh_CN first weekday should be Monday per GB/T
789 [24824] libc: test-in-container does not install charmap files compatible
791 [24844] regex: regex bad pointer / leakage if malloc fails
792 [24867] malloc: Unintended malloc_info formatting changes
793 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
794 [24880] libc: login: utmp implementation uses struct flock with fcntl64
795 [24882] libc: login: pututline uses potentially outdated cache
796 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
797 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
799 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
801 [24930] dynamic-link: dlopen of PIE executable can result in
802 _dl_allocate_tls_init assertion failure
803 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
804 (stringop-overflow error)
805 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
806 functions other can lead to crashes
807 [24967] libc: jemalloc static linking causes runtime failure
808 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
810 [25035] libc: sbrk() failure handled poorly in tunables_strdup
811 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
812 [25097] libc: new -Warray-bounds with GCC 10
813 [25112] dynamic-link: dlopen must not make new objects accessible when it
814 still can fail with an error
815 [25139] localedata: Please add the new mnw_MM locale
816 [25149] regex: Array bounds violation in proceed_next_node
817 [25157] dynamic-link: Audit cookie for the dynamic loader is not
818 initialized correctly
819 [25189] libc: glibc's __glibc_has_include causes issues with clang
821 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
823 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
824 binaries (CVE-2019-19126)
825 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
827 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
829 [25232] string: <string.h> does not enable const correctness for strchr et
831 [25233] localedata: Consider "." as the thousands separator for sl_SI
833 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
834 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
835 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
837 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
838 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
840 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
841 (dl_initfirst) link map pointer
842 [25401] malloc: pvalloc must not have __attribute_alloc_size__
843 [25423] libc: Array overflow in backtrace on powerpc
844 [25425] network: Missing call to __resolv_context_put in
845 getaddrinfo.c:gethosts
852 * Unicode 12.1.0 Support: Character encoding, character type info, and
853 transliteration tables are all updated to Unicode 12.1.0, using
854 generator scripts contributed by Mike FABIAN (Red Hat).
856 * The dynamic linker accepts the --preload argument to preload shared
857 objects, in addition to the LD_PRELOAD environment variable.
859 * The twalk_r function has been added. It is similar to the existing
860 twalk function, but it passes an additional caller-supplied argument
861 to the callback function.
863 * On Linux, the getdents64, gettid, and tgkill functions have been added.
865 * Minguo (Republic of China) calendar support has been added as an
866 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
869 * The entry for the new Japanese era has been added for ja_JP locale.
871 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
872 pvalloc, memalign, and posix_memalign fail now with total object size
873 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
874 pointer subtraction within the allocated object, where results might
875 overflow the ptrdiff_t type.
877 * The dynamic linker no longer refuses to load objects which reference
878 versioned symbols whose implementation has moved to a different soname
879 since the object has been linked. The old error message, symbol
880 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
881 link time reference, is gone.
883 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
884 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
885 functions. These behave similarly to their "timed" equivalents, but also
886 accept a clockid_t parameter to determine which clock their timeout should
887 be measured against. All functions allow waiting against CLOCK_MONOTONIC
888 and CLOCK_REALTIME. The decision of which clock to be used is made at the
889 time of the wait (unlike with pthread_condattr_setclock, which requires
890 the clock choice at initialization time).
892 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
893 work, new resolvers can use a second argument which can be extended in
894 the future, currently it contains the AT_HWCAP2 value.
896 Deprecated and removed features, and other changes affecting compatibility:
898 * The copy_file_range function fails with ENOSYS if the kernel does not
899 support the system call of the same name. Previously, user space
900 emulation was performed, but its behavior did not match the kernel
901 behavior, which was deemed too confusing. Applications which use the
902 copy_file_range function can no longer rely on glibc to provide a fallback
903 on kernels that do not support the copy_file_range system call, and if
904 this function returns ENOSYS, they will need to use their own fallback.
905 Support for copy_file_range for most architectures was added in version
906 4.5 of the mainline Linux kernel.
908 * The functions clock_gettime, clock_getres, clock_settime,
909 clock_getcpuclockid, clock_nanosleep were removed from the librt library
910 for new applications (on architectures which had them). Instead, the
911 definitions in libc will be used automatically, which have been available
914 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
915 and <sys/stropts.h> have been removed.
917 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
918 resolver flag (deprecated in glibc 2.25) have been removed.
920 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
921 resolver have been removed from <resolv.h>.
923 * With --enable-bind-now, installed programs are now linked with the
926 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
927 configurations) has been removed, following the deprecation of this
928 subarchitecture in version 8 of GCC, and its removal in version 9.
930 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
931 header have been removed.
933 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
934 deprecated and will be removed from a future version of glibc.
935 Application should directly access /proc instead. For obtaining random
936 bits, the getentropy function can be used.
938 Changes to build and runtime requirements:
940 * GCC 6.2 or later is required to build the GNU C Library.
942 Older GCC versions and non-GNU compilers are still supported when
943 compiling programs that use the GNU C Library.
945 Security related changes:
947 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
948 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
949 has undefined behavior. On x32, the size_t argument may be passed
950 in the lower 32 bits of the 64-bit RDX register with non-zero upper
951 32 bits. When it happened with the sign bit of RDX register set,
952 memcmp gave the wrong result since it treated the size argument as
953 zero. Reported by H.J. Lu.
955 CVE-2019-9169: Attempted case-insensitive regular-expression match
956 via proceed_next_node in posix/regexec.c leads to heap-based buffer
957 over-read. Reported by Hongxu Chen.
959 The following bugs are resolved with this release:
961 [2872] locale: Transliteration Cyrillic -> ASCII fails
962 [6399] libc: gettid() should have a wrapper
963 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
964 [16976] glob: fnmatch unbounded stack VLA for collating symbols
965 [17396] localedata: globbing for locale by [[.collating-element.]]
966 [18035] dynamic-link: pldd does no longer work, enters infinite loop
967 [18465] malloc: memusagestat is built using system C library
968 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
969 invalid input drops valid char
970 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
971 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
972 [21897] localedata: Afar locales: Fix mon, abmon, and abday
973 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
974 [23352] malloc: __malloc_check_init still defined in public header
976 [23403] nptl: Wrong alignment of TLS variables
977 [23501] libc: nftw() doesn't return dangling symlink's inode
978 [23733] malloc: Check the count before calling tcache_get()
979 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
981 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
982 [23844] nptl: pthread_rwlock_trywrlock results in hang
983 [23983] argparse: Missing compat versions of argp_failure and argp_error
984 for long double = double
985 [23984] libc: Missing compat versions of err.h and error.h functions for
987 [23996] localedata: Dutch salutations
988 [24040] libc: riscv64: unterminated call chain in __thread_start
989 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
991 [24051] stdio: puts and putchar output to _IO_stdout instead of stdout
992 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
994 [24114] regex: regexec buffer read overrun in "grep -i
995 '\(\(\)*.\)*\(\)\(\)\1'"
996 [24122] libc: Segfaults if 0 returned from la_version
997 [24153] stdio: Some input functions do not react to stdin assignment
998 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
999 RDX is set) (CVE-2019-7309)
1000 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
1001 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
1002 not the default "nor"
1003 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
1004 false positives, change to modern flexible array
1005 [24180] nptl: pthread_mutex_trylock does not use the correct order of
1006 instructions while maintaining the robust mutex list due to missing
1008 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
1009 unnecessary librt dependencies
1010 [24200] localedata: Revert first_weekday removal in en_IE locale
1011 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
1012 [24215] nptl: pthread_timedjoin_np should be a cancellation point
1013 [24216] malloc: Check for large bin list corruption when inserting
1015 [24228] stdio: old x86 applications that use legacy libio crash on exit
1016 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
1018 [24293] localedata: Missing Minguo calendar support for TW locales
1019 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
1020 tt_RU (Tatar) locale
1021 [24307] localedata: Update locale data to Unicode 12.0.0
1022 [24323] dynamic-link: dlopen should not be able open PIE objects
1023 [24335] build: "Obsolete types detected" with Linux 5.0 headers
1024 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
1025 tt_RU (Tatar) locale
1026 [24370] localedata: Add lang_name for tt_RU locale
1027 [24372] locale: Binary locale files are not architecture independent
1028 [24394] time: strptime %Ey mis-parses final year of era
1029 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
1031 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
1033 [24531] malloc: Malloc tunables give tcache assertion failures
1034 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
1036 [24535] localedata: Update locale data to Unicode 12.1.0
1037 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
1038 kernels and break testing
1039 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
1040 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
1041 [-Werror=format-overflow=]
1042 [24570] libc: alpha: compat msgctl uses __IPC_64
1043 [24584] locale: Data race in __wcsmbs_clone_conv
1044 [24588] stdio: Remove codecvt vtables from libio
1045 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
1047 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
1048 [24632] stdio: Old binaries which use freopen with default stdio handles
1050 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
1052 [24652] localedata: szl_PL spelling correction
1053 [24695] nss: nss_db: calling getpwent after endpwent crashes
1054 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
1055 in /etc/nsswitch.conf
1056 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
1057 [24740] libc: getdents64 type confusion
1058 [24741] dynamic-link: ld.so should not require that a versioned symbol is
1059 always implemented in the same library
1060 [24744] libc: Remove copy_file_range emulation
1061 [24757] malloc: memusagestat is linked against system libpthread
1062 [24794] libc: Partial test suite run builds corrupt test-in-container
1070 * The getcpu wrapper function has been added, which returns the currently
1071 used CPU and NUMA node. This function is Linux-specific.
1073 * A new convenience target has been added for distribution maintainers
1074 to build and install all locales as directories with files. The new
1075 target is run by issuing the following command in your build tree:
1076 'make localedata/install-locale-files', with an optional DESTDIR
1077 to set the install root if you wish to install into a non-default
1078 configured location.
1080 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
1082 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
1083 for _GNU_SOURCE, to match BSD environments.
1085 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
1086 indicates that it will abort the transaction prior to entering the kernel
1087 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
1088 suspended, and this caused some undefined side-effects issues by aborting
1089 transactions manually. Glibc avoided it by abort transactions manually on
1090 each syscall, but it lead to performance issues on newer kernels where the
1091 HTM state is saved and restore lazily (the state being saved even when the
1092 process actually does not use HTM).
1094 * The functions posix_spawn_file_actions_addchdir_np and
1095 posix_spawn_file_actions_addfchdir_np have been added, enabling
1096 posix_spawn and posix_spawnp to run the new process in a different
1097 directory. These functions are GNU extensions. The function
1098 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
1101 * The popen and system do not run atfork handlers anymore (BZ#17490).
1102 Although it is a possible POSIX violation, the POSIX rationale in
1103 pthread_atfork documentation regarding atfork handlers is to handle
1104 inconsistent mutex state after a fork call in a multi-threaded process.
1105 In both popen and system there is no direct access to user-defined mutexes.
1107 * Support for the C-SKY ABIV2 running on Linux has been added. This port
1108 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
1110 - C-SKY ABIV2 soft-float little-endian
1111 - C-SKY ABIV2 hard-float little-endian
1113 * strftime's default formatting of a locale's alternative year (%Ey)
1114 has been changed to zero-pad the year to a minimum of two digits,
1115 like "%y". This improves the display of Japanese era years during
1116 the first nine years of a new era, and is expected to be harmless
1117 for all other locales (only Japanese locales regularly have
1118 alternative year numbers less than 10). Zero-padding can be
1119 overridden with the '_' or '-' flags (which are GNU extensions).
1121 * As a GNU extension, the '_' and '-' flags can now be applied to
1122 "%EY" to control how the year number is formatted; they have the
1123 same effect that they would on "%Ey".
1125 Deprecated and removed features, and other changes affecting compatibility:
1127 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
1128 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
1130 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
1131 in <sys/procfs.h>, has been corrected to match the type actually used by
1132 the Linux kernel. This affects the size and layout of that structure on
1133 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
1135 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
1136 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
1137 defined in <sys/procfs.h>, has been corrected to match the type actually
1138 used by the Linux kernel. This affects the size and layout of those
1141 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
1142 meant to scan a string and allocate space for it with malloc, is now
1143 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
1144 defined. This extension conflicts with C99's use of '%a' to scan a
1145 hexadecimal floating-point number, which is now available to programs
1146 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
1148 POSIX.1-2008 includes the feature of allocating a buffer for string input
1149 with malloc, using the modifier letter 'm' instead. Programs using
1150 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
1151 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
1152 C99 '%a' no longer need to avoid _GNU_SOURCE.
1154 GCC's -Wformat warnings can detect most uses of this extension, as long
1155 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
1156 __attribute__ ((format (scanf, ...))).
1158 Changes to build and runtime requirements:
1160 * Python 3.4 or later is required to build the GNU C Library.
1162 * On most architectures, GCC 5 or later is required to build the GNU C
1163 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
1165 Older GCC versions and non-GNU compilers are still supported when
1166 compiling programs that use the GNU C Library.
1168 Security related changes:
1170 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
1171 denial of service due to resource exhaustion when processing getaddrinfo
1172 calls with crafted host names. Reported by Guido Vranken.
1174 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
1175 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
1176 happened, accessing the 32-bit size_t value as the full 64-bit register
1177 in the assembly string/memory functions would cause a buffer overflow.
1178 Reported by H.J. Lu.
1180 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
1181 addresses with arbitrary trailing characters, potentially leading to data
1182 or command injection issues in applications.
1184 The following bugs are resolved with this release:
1186 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
1187 [10496] localedata: 12h time representation in multiple locales faulty
1188 [10797] localedata: it_IT locale numeric does not have a separator for
1190 [11319] libc: dprintf doesn't handle errors properly
1191 [16346] time: mktime: potentially unsafe use of localtime_offset
1192 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
1194 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
1195 posix_spawn_file_actions_addfchdir_np
1196 [17426] localedata: Indian locales: set the correct date format
1197 [17490] stdio: popen should not invoke atfork handlers
1198 [17783] libc: TIOCSER_TEMT conditions inconsistent
1199 [18040] regex: use-after-free in regexec/get_subexp
1200 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
1201 [20018] network: getaddrinfo should reject IP addresses with trailing
1202 characters (CVE-2016-10739)
1203 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
1204 [20271] libc: Missing "\n" in __libc_fatal calls
1205 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
1206 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
1207 pointer argument is non-NULL
1208 [21037] stdio: open_memstream and freopen
1209 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
1210 [21716] time: Crash in glibc's mktime in low-memory situations
1211 [22834] stdio: Subprocess forked by popen may crash in Linux when
1212 multithreads call popen
1213 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
1214 and pthread_create fails.
1215 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
1216 [23125] libc: riscv64: endless loop when throwing an exception from a
1218 [23275] nptl: Race in pthread_mutex_lock while promoting to
1219 PTHREAD_MUTEX_ELISION_NP.
1220 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
1222 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
1224 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
1226 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
1227 [23509] dynamic-link: CET enabled glibc is incompatible with the older
1229 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
1230 [23521] nss: get_next_alias nss_files file stream leak
1231 [23538] nptl: Hang in pthread_cond_broadcast
1232 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
1233 [23578] regex: Invalid memory access if regex pattern contains NUL byte
1234 [23579] libc: Errors misreported in preadv2
1235 [23597] build: support/test-container.c doesn't work with different
1237 [23603] time: mktime signed integer overflow on large timestamps
1238 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
1239 [23614] libc: powerpc: missing CFI register information in __mpn_*
1241 [23637] string: Generic strstr/strcasestr fails with huge needles
1242 [23640] libc: no way to easily clear FD_CLOEXEC in
1243 posix_spawn_file_actions_adddup2()
1244 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
1246 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
1248 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
1249 [23689] libc: Bug in documentation for rusage.ru_ixrss in
1250 bits/types/struct_rusage.h
1251 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
1253 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
1255 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
1256 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
1257 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
1259 [23724] localedata: Albanian date formats are incorrect
1260 [23735] math: libnldbl_nonshared.a references internal libm symbols
1261 [23740] localedata: kl_GL: Month names and date formats need update
1262 [23744] regex: regex refactorings to remove BE, avoid duplication
1263 [23745] time: mktime fix for Gnulib + coreutils
1264 [23758] time: Improve the width of alternate representation for year in
1266 [23783] libc: [mips] Missing CMSPAR bits/termios.h
1267 [23789] time: mktime does not set errno on failure
1268 [23791] localedata: Wrong monetary format for ca_ES locale
1269 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
1270 [23794] locale: c16rtomb does not handle surrogate pairs
1271 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
1272 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
1273 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
1274 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
1275 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
1276 [23862] libc: [sh] missing kernel-features.h undefines
1277 [23864] libc: [riscv] missing kernel-features.h undefines
1278 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
1279 [23907] malloc: Incorrect double-free malloc tcache check disregards
1281 [23913] libc: off-by-one in function maybe_script_execute in
1282 sysdeps/posix/spawni.c
1283 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
1284 [23923] locale: Add --no-hard-links option to localedef
1285 [23927] network: Linux if_nametoindex() does not close descriptor
1287 [23961] math: powf can overflow to inf without setting errno in non-
1288 nearest rounding mode
1289 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
1290 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
1291 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
1292 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
1293 [24011] localedata: Fixed small type in comment for locale bs_BA
1294 [24018] libc: gettext() may return NULL
1295 [24022] build: riscv build failure with Linux kernel 4.20-rc7
1296 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
1297 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
1299 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
1300 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
1302 [24046] localedata: en_US locale doesn't define date_fmt
1303 [24063] manual: @var{errno} should be @code{errno}
1304 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
1305 [24088] libc: VSCR field is not being correctly read in ucontext_t on
1307 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
1309 [24097] string: Can't use 64-bit register for size_t in assembly codes for
1311 [24110] hurd: SS_DISABLE never set in stack_t value returned by
1313 [24112] network: Do not send DNS queries for non-host names (where all
1314 answers will be rejected)
1315 [24130] libc: alpha __remqu corrupts $f3 register
1322 * The localization data for ISO 14651 is updated to match the 2016
1323 Edition 4 release of the standard, this matches data provided by
1324 Unicode 9.0.0. This update introduces significant improvements to the
1325 collation of Unicode characters. This release deviates slightly from
1326 the standard in that the collation element ordering for lowercase and
1327 uppercase LATIN script characters is adjusted to ensure that regular
1328 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1329 is not matched by [a-z]. With the update many locales have been
1330 updated to take advantage of the new collation information. The new
1331 collation information has increased the size of the compiled locale
1332 archive or binary locales.
1334 * The GNU C Library can now be compiled with support for Intel CET, AKA
1335 Intel Control-flow Enforcement Technology. When the library is built
1336 with --enable-cet, the resulting glibc is protected with indirect
1337 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1338 compatible with all existing executables and shared libraries. This
1339 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1340 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1341 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1342 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1343 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1344 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1347 * The GNU C Library now has correct support for ABSOLUTE symbols
1348 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1349 relocated incorrectly or in some cases discarded. The GNU linker can
1350 make use of the newer semantics, but it must communicate it to the
1351 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1352 field) to indicate such support is required.
1354 * Unicode 11.0.0 Support: Character encoding, character type info, and
1355 transliteration tables are all updated to Unicode 11.0.0, using
1356 generator scripts contributed by Mike FABIAN (Red Hat).
1358 * <math.h> functions that round their results to a narrower type are added
1359 from TS 18661-1:2014 and TS 18661-3:2015:
1361 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1362 fMxaddfNx functions.
1364 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1365 fMxsubfNx functions.
1367 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1368 fMxmulfNx functions.
1370 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1371 fMxdivfNx functions.
1373 * Two grammatical forms of month names are now supported for the following
1374 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1375 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1376 support two grammatical forms in abbreviated month names: Catalan, Greek,
1379 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1380 include the support for two grammatical forms of month names.
1382 * Building and running on GNU/Hurd systems now works without out-of-tree
1385 * The renameat2 function has been added, a variant of the renameat function
1386 which has a flags argument. If the flags are zero, the renameat2 function
1387 acts like renameat. If the flag is not zero and there is no kernel
1388 support for renameat2, the function will fail with an errno value of
1389 EINVAL. This is different from the existing gnulib function renameatu,
1390 which performs a plain rename operation in case of a RENAME_NOREPLACE
1391 flags and a non-existing destination (and therefore has a race condition
1392 that can clobber the destination inadvertently).
1394 * The statx function has been added, a variant of the fstatat64
1395 function with an additional flags argument. If there is no direct
1396 kernel support for statx, glibc provides basic stat support based on
1397 the fstatat64 function.
1399 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1400 library if installed. libidn2 version 2.0.5 or later is recommended. If
1401 libidn2 is not available, internationalized domain names are not encoded
1402 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1403 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1404 with an encoding error.) Flags which used to change the IDN encoding and
1405 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1406 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1407 deprecated. They no longer have any effect.
1409 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1410 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1411 range of ELF gABI expressions including such constructs as
1412 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1413 have been further restricted, and where in the past a dynamic string
1414 token sequence may have been interpreted as a literal string it will
1415 now cause a load failure. These load failures were always considered
1416 unspecified behaviour from the perspective of the dynamic loader, and
1417 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1418 results in a load failure now.
1420 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1421 implementation includes all the standard functions provided by
1424 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1425 thrd_detach, thrd_exit, and thrd_join for thread management.
1427 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1428 mtx_destroy for mutual exclusion.
1430 - call_once for function call synchronization.
1432 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1433 cnd_wait for conditional variables.
1435 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1437 Application developers must link against libpthread to use ISO C threads.
1439 Deprecated and removed features, and other changes affecting compatibility:
1441 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1442 installed. Software that was using either header should be updated to
1443 use standard <stdio.h> interfaces instead.
1445 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1446 This was never required by the C standard, and the macros just expanded
1447 to call alternative names for the same functions. If you hoped getc and
1448 putc would provide performance improvements over fgetc and fputc, instead
1449 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1450 necessary, flockfile and funlockfile.
1452 * All stdio functions now treat end-of-file as a sticky condition. If you
1453 read from a file until EOF, and then the file is enlarged by another
1454 process, you must call clearerr or another function with the same effect
1455 (e.g. fseek, rewind) before you can read the additional data. This
1456 corrects a longstanding C99 conformance bug. It is most likely to affect
1457 programs that use stdio to read interactive input from a terminal.
1460 * The macros 'major', 'minor', and 'makedev' are now only available from
1461 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1462 headers that happen to include <sys/types.h>. These macros are rarely
1463 used, not part of POSIX nor XSI, and their names frequently collide with
1464 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1465 further explanation.
1467 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1468 these macros should first include <sys/types.h>, and then include
1469 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1471 * The tilegx*-*-linux-gnu configurations are no longer supported.
1473 * The obsolete function ustat is no longer available to newly linked
1474 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1475 function has been deprecated in favor of fstatfs and statfs.
1477 * The obsolete function nfsservctl is no longer available to newly linked
1478 binaries. This function was specific to systems using the Linux kernel
1479 and could not usefully be used with the GNU C Library on systems with
1480 version 3.1 or later of the Linux kernel.
1482 * The obsolete function name llseek is no longer available to newly linked
1483 binaries. This function was specific to systems using the Linux kernel
1484 and was not declared in a header. Programs should use the lseek64 name
1485 for this function instead.
1487 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1488 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1489 previously selected by them is now always enabled.
1491 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1492 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1493 restriction (rejecting '_' in host names, among other things) has been
1494 removed, for increased compatibility with non-IDN name resolution.
1496 * The fcntl function now have a Long File Support variant named fcntl64. It
1497 is added to fix some Linux Open File Description (OFD) locks usage on non
1498 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1499 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1500 locks act as a cancellation entrypoint.
1502 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1503 ecb_crypt, and des_setparity are no longer available to newly linked
1504 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1505 longer installed. These functions encrypted and decrypted data with the
1506 DES block cipher, which is no longer considered secure. Software that
1507 still uses these functions should switch to a modern cryptography library,
1510 * Reflecting the removal of the encrypt and setkey functions above, the
1511 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1512 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1515 * The obsolete function fcrypt is no longer available to newly linked
1516 binaries. It was just another name for the standard function crypt,
1517 and it has not appeared in any header file in many years.
1519 * We have tentative plans to hand off maintenance of the passphrase-hashing
1520 library, libcrypt, to a separate development project that will, we hope,
1521 keep up better with new passphrase-hashing algorithms. We will continue
1522 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1523 'crypt_r' should not need to change at all; however, distributions will
1524 need to install <crypt.h> and libcrypt from a separate project.
1526 In this release, if the configure option --disable-crypt is used, glibc
1527 will not install <crypt.h> or libcrypt, making room for the separate
1528 project's versions of these files. The plan is to make this the default
1529 behavior in a future release.
1531 Changes to build and runtime requirements:
1533 GNU make 4.0 or later is now required to build glibc.
1535 Security related changes:
1537 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1538 been fixed by removing the glibc-internal IDNA implementation and using
1539 the system-provided libidn2 library instead. Originally reported by Hanno
1540 Böck and Christian Weisgerber.
1542 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1543 architecture could corrupt memory. Reported by Max Horn.
1545 CVE-2018-11236: Very long pathname arguments to realpath function could
1546 result in an integer overflow and buffer overflow. Reported by Alexey
1549 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1550 architecture could write beyond the target buffer, resulting in a buffer
1551 overflow. Reported by Andreas Schwab.
1553 The following bugs are resolved with this release:
1555 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1556 [6889] manual: 'PWD' mentioned but not specified
1557 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1558 when __WORDSIZE != 64
1559 [13762] regex: re_search etc. should return -2 on memory exhaustion
1560 [13888] build: /tmp usage during testing
1561 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1562 [14092] nptl: Support C11 threads
1563 [14095] localedata: Review / update collation data from Unicode / ISO
1565 [14508] libc: -Wformat warnings
1566 [14553] libc: Namespace pollution loff_t in sys/types.h
1567 [14890] libc: Make NT_PRFPREG canonical.
1568 [15105] libc: Extra PLT references with -Os
1569 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1571 [16335] manual: Feature test macro documentation incomplete and out of
1573 [16552] libc: Unify umount implementations in terms of umount2
1574 [17082] libc: htons et al.: statement-expressions prevent use on global
1575 scope with -O1 and higher
1576 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1577 [17438] localedata: pt_BR: wrong d_fmt delimiter
1578 [17662] libc: please implement binding for the new renameat2 syscall
1579 [17721] libc: __restrict defined as /* Ignore */ even in c11
1580 [17979] libc: inconsistency between uchar.h and stdint.h
1581 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1582 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1583 horrible machine code)
1584 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1586 [18471] libc: llseek should be a compat symbol
1587 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1589 [18991] nss: nss_files skips large entry in database
1590 [19239] libc: Including stdlib.h ends up with macros major and minor being
1592 [19463] libc: linknamespace failures when compiled with -Os
1593 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1594 [19527] locale: Normalized charset name not recognized by setlocale
1595 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1596 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1598 [19728] network: out of bounds stack read in libidn function
1599 idna_to_ascii_4i (CVE-2016-6261)
1600 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1601 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1602 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1604 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1605 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1606 [20419] dynamic-link: files with large allocated notes crash in
1608 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1609 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1610 [20980] manual: CFLAGS environment variable replaces vital options
1611 [21163] regex: Assertion failure in pop_fail_stack when executing a
1612 malformed regexp (CVE-2015-8985)
1613 [21234] manual: use of CFLAGS makes glibc detect no optimization
1614 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1615 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1616 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1617 [21508] locale: intl/tst-gettext failure with latest msgfmt
1618 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1619 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1620 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1622 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1624 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1625 [22247] network: Integer overflow in the decode_digit function in
1626 puny_decode.c in libidn (CVE-2017-14062)
1627 [22342] nscd: NSCD not properly caching netgroup
1628 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1629 [22550] localedata: es_ES locale (and other es_* locales): collation
1630 should treat ñ as a primary different character, sync the collation
1631 for Spanish with CLDR
1632 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1633 by gcc configured with --enable-default-pie
1634 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1635 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1636 crossing 2GB threshold (CVE-2017-18269)
1637 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1639 [22735] time: Misleading typo in time.h source comment regarding
1641 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1642 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1643 `__assert_perror_fail ()' to `__assert_fail_base ()'
1644 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1646 [22786] libc: Stack buffer overflow in realpath() if input size is close
1647 to SSIZE_MAX (CVE-2018-11236)
1648 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1649 through an absolute DT_NEEDED path
1650 [22792] build: tcb-offsets.h dependency dropped
1651 [22797] libc: pkey_get() uses non-reserved name of argument
1652 [22807] libc: PTRACE_* constants missing for powerpc
1653 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1654 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1655 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1656 [22848] localedata: ca_ES: update date definitions from CLDR
1657 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1658 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1659 [22896] localedata: Update locale data for an_ES
1660 [22902] math: float128 test failures with GCC 8
1661 [22918] libc: multiple common of `__nss_shadow_database'
1662 [22919] libc: sparc32: backtrace yields infinite backtrace with
1664 [22926] libc: FTBFS on powerpcspe
1665 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1667 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1668 [22947] libc: FAIL: misc/tst-preadvwritev2
1669 [22963] localedata: cs_CZ: Add alternative month names
1670 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1671 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1672 [22998] dynamic-link: execstack tests are disabled when SELinux is
1674 [23005] network: Crash in __res_context_send after memory allocation
1676 [23007] math: strtod cannot handle -nan
1677 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1678 [23036] regex: regex equivalence class regression
1679 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1680 [23069] libc: sigaction broken on riscv64-linux-gnu
1681 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1682 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1683 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1684 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1685 and libc build with -Os)
1686 [23140] localedata: More languages need two forms of month names
1687 [23145] libc: _init/_fini aren't marked as hidden
1688 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1689 [23171] math: C++ iseqsig for long double converts arguments to double
1690 [23178] nscd: sudo will fail when it is run in concurrent with commands
1691 that changes /etc/passwd
1692 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1694 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1695 [23208] localedata: New locale - Lower Sorbian (dsb)
1696 [23233] regex: Memory leak in build_charclass_op function in file
1698 [23236] stdio: Harden function pointers in _IO_str_fields
1699 [23250] nptl: Offset of __private_ss differs from GCC
1700 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1701 -mtune=generic -mfpmath=sse
1702 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1704 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1705 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1707 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1708 [23277] math: nan function should not have const attribute
1709 [23279] math: scanf and strtod wrong for some hex floating-point
1710 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1712 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1713 [23303] build: undefined reference to symbol
1714 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1715 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1717 [23313] stdio: libio vtables validation and standard file object
1719 [23329] libc: The __libc_freeres infrastructure is not properly run across
1721 [23349] libc: Various glibc headers no longer compatible with
1723 [23351] malloc: Remove unused code related to heap dumps and malloc
1725 [23363] stdio: stdio-common/tst-printf.c has non-free license
1726 [23396] regex: Regex equivalence regression in single-byte locales
1727 [23422] localedata: oc_FR: More updates of locale data
1728 [23442] build: New warning with GCC 8
1729 [23448] libc: Out of bounds access in IBM-1390 converter
1730 [23456] libc: Wrong index_cpu_LZCNT
1731 [23458] build: tst-get-cpu-features-static isn't added to tests
1732 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1734 [23467] dynamic-link: x86/CET: A property note parser bug
1741 * The GNU C Library can now be compiled with support for building static
1742 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1743 executables are like static executables but can be loaded at any address
1744 and provide additional security hardening benefits at the cost of some
1745 memory and performance. When the library is built with --enable-static-pie
1746 the resulting libc.a is usable with GCC 8 and above to create static PIE
1747 executables using the GCC option '-static-pie'. This feature is currently
1748 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1749 aarch64 with binutils 2.30 or later.
1751 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1752 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1755 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1757 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1759 * In order to support faster and safer process termination the malloc API
1760 family of functions will no longer print a failure address and stack
1761 backtrace after detecting heap corruption. The goal is to minimize the
1762 amount of work done after corruption is detected and to avoid potential
1763 security issues in continued process execution. Reducing shutdown time
1764 leads to lower overall process restart latency, so there is benefit both
1765 from a security and performance perspective.
1767 * The abort function terminates the process immediately, without flushing
1768 stdio streams. Previous glibc versions used to flush streams, resulting
1769 in deadlocks and further data corruption. This change also affects
1770 process aborts as the result of assertion failures.
1772 * On platforms where long double has the IEEE binary128 format (aarch64,
1773 alpha, mips64, riscv, s390 and sparc), the math library now implements
1774 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1775 These are the same interfaces added in version 2.26 for some platforms where
1776 this format is supported but is not the format of long double.
1778 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1779 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1780 implements interfaces for that type, as defined by ISO/IEC TS
1781 18661-3:2015. These are corresponding interfaces to those supported for
1784 * The math library now implements interfaces for the _Float32, _Float64 and
1785 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1786 corresponding interfaces to those supported for _Float128.
1788 * glibc now implements the memfd_create and mlock2 functions on Linux.
1790 * Support for memory protection keys was added. The <sys/mman.h> header now
1791 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1794 * The copy_file_range function was added.
1796 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1798 * The ldconfig utility now processes `include' directives using the C/POSIX
1799 collation ordering. Previous glibc versions used locale-specific
1800 ordering, the change might break systems that relied on that.
1802 * Support for two grammatical forms of month names has been added.
1803 In a call to strftime, the "%B" and "%b" format specifiers will now
1804 produce the grammatical form required when the month is used as part
1805 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1806 required when the month is named by itself. For instance, in Greek
1807 and in many Slavic and Baltic languages, "%B" will produce the month
1808 in genitive case, and "%OB" will produce the month in nominative case.
1810 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1811 are all valid and will all accept any known form of month
1812 name---standalone or complete, abbreviated or full. In a call to
1813 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1814 the strings used by "%B" and "%b", respectively. New query
1815 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1816 used by "%OB" and "%Ob", respectively.
1818 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1819 define the strings for %OB and %Ob, respectively; these have the
1820 same syntax as "mon" and "abmon". These arrays are optional; if they
1821 are not provided then they have the same content as "mon" and "abmon",
1824 These features are provided for locales which define "alt_mon" and/or
1825 "ab_alt_mon" in their locale source data. This release includes such
1826 alternative month name data for the following languages: Belarusian,
1827 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1829 This feature is currently a GNU extension, but it is expected to
1830 be added to the next revision of POSIX, and it is also already
1831 available on some BSD-derived operating systems.
1833 This feature will cause existing statically compiled applications
1834 to fail to load locales and fall back to the builtin C/POSIX locales.
1835 See notes below for other changes affecting compatibility.
1837 * Support for the RISC-V ISA running on Linux has been added. This port
1838 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1839 for the following ISA and ABI pairs:
1845 Deprecated and removed features, and other changes affecting compatibility:
1847 * Statically compiled applications attempting to load locales compiled for the
1848 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1849 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1850 support for two grammatical forms of the month names, also extends the locale
1851 data binary format. Static applications needing locale support must be
1852 recompiled to match the runtime and data they are deployed with. In some
1853 distributions there is an upgrade window where dynamically linked applications
1854 may use a new library but the old locale data and also fall back to the
1855 builtin C/POSIX locales; restarting the application process is sufficient to
1858 * Support for statically linked applications which call dlopen is deprecated
1859 and will be removed in a future version of glibc. Applications which call
1860 dlopen need to be linked dynamically instead.
1862 * Support for old programs which use internal stdio data structures and
1863 functions is deprecated. This includes programs which use the C++ streams
1864 provided by libstdc++ in GCC 2.95. Programs which use the internal
1865 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1866 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1867 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1868 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1869 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1870 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1871 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1872 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1873 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1874 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1875 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1876 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1877 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1878 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1879 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1880 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1881 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1882 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1883 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1884 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1885 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1886 future version of glibc. Unlike other symbol removals, these old
1887 applications will not be supported using compatibility symbols.
1889 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1890 defined by <sys/ptrace.h>.
1892 * libm no longer supports SVID error handling (calling a user-provided
1893 matherr function on error) or the _LIB_VERSION variable to control error
1894 handling. (SVID error handling and the _LIB_VERSION variable still work
1895 for binaries linked against older versions of the GNU C Library.) The
1896 libieee.a library is no longer provided. math.h no longer defines struct
1897 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1898 TLOSS, PLOSS and HUGE.
1900 * The libm functions pow10, pow10f and pow10l are no longer supported for
1901 new programs. Programs should use the standard names exp10, exp10f and
1902 exp10l for these functions instead.
1904 * The mcontext_t type is no longer the same as struct sigcontext. On
1905 platforms where it was previously the same, this changes the C++ name
1906 mangling for interfaces involving this type.
1908 * The add-ons mechanism for building additional packages at the same time as
1909 glibc has been removed. The --enable-add-ons configure option is now
1912 * The --without-fp configure option is now ignored. Whether hardware
1913 floating-point instructions are used is now configured based on whether
1914 the compiler used at configure time (without any options implied by a
1915 --with-cpu= configure option) uses such instructions.
1917 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1918 the specified string can be parsed as a domain name.
1920 * In the malloc_info output, the <heap> element may contain another <aspace>
1921 element, "subheaps", which contains the number of sub-heaps.
1923 * The libresolv function p_secstodate is no longer supported for new
1926 * The tilepro-*-linux-gnu configuration is no longer supported.
1928 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1929 and will be removed in a future release. Software that is still using
1930 either header should be updated to use standard <stdio.h> interfaces
1933 libio.h was originally the header for a set of supported GNU extensions,
1934 but they have not been maintained as such in many years, they are now
1935 standing in the way of improvements to stdio, and we don't think there are
1936 any remaining external users. _G_config.h was never intended for public
1937 use, but predates the bits convention.
1939 Changes to build and runtime requirements:
1941 * bison version 2.7 or later is required to generate code in the 'intl'
1944 Security related changes:
1946 CVE-2009-5064: The ldd script would sometimes run the program under
1947 examination directly, without preventing code execution through the
1948 dynamic linker. (The glibc project disputes that this is a security
1949 vulnerability; only trusted binaries must be examined using the ldd
1952 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1953 suffered from a one-byte overflow during ~ operator processing (either
1954 on the stack or the heap, depending on the length of the user name).
1955 Reported by Tim Rühsen.
1957 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1958 would sometimes fail to free memory allocated during ~ operator
1959 processing, leading to a memory leak and, potentially, to a denial
1962 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1963 without GLOB_NOESCAPE, could write past the end of a buffer while
1964 unescaping user names. Reported by Tim Rühsen.
1966 CVE-2017-17426: The malloc function, when called with an object size near
1967 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1968 instead of NULL. This was a regression introduced with the new malloc
1969 thread cache in glibc 2.26. Reported by Iain Buclaw.
1971 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1972 to the allocation of too much memory. (This is not a security bug per se,
1973 it is mentioned here only because of the CVE assignment.) Reported by
1976 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1977 of the number of search path components. (This is not a security
1978 vulnerability per se because no trust boundary is crossed if the fix for
1979 CVE-2017-1000366 has been applied, but it is mentioned here only because
1980 of the CVE assignment.) Reported by Qualys.
1982 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1983 for AT_SECURE or SUID binaries could be used to load libraries from the
1986 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1987 succeeds without returning an absolute path due to unexpected behaviour
1988 of the Linux kernel getcwd syscall. Reported by halfdog.
1990 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1991 an object size near the value of SIZE_MAX, would return a pointer to a
1992 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1994 CVE-2018-6551: The malloc function, when called with an object size near
1995 the value of SIZE_MAX, would return a pointer to a buffer which is too
1996 small, instead of NULL.
1998 The following bugs are resolved with this release:
2000 [866] glob: glob should match dangling symlinks
2001 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
2002 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
2004 [5997] math: Very slow execution of sinf function
2005 [10580] localedata: hr_HR: updated locale
2006 [10871] locale: 'mon' array should contain both nominative and genitive
2008 [12349] localedata: eu_ES: incorrect thousands separator
2009 [13605] localedata: shn_MM: new Shan locale
2010 [13805] localedata: ru_RU: currency should use ',' as radix point
2011 [13953] localedata: km_KH: locale update
2012 [13994] localedata: mjw_IN: new locale
2013 [14121] build: make writes .mo files in po directory
2014 [14333] libc: Fix the race between atexit() and exit()
2015 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
2016 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
2018 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
2019 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
2020 width Latin characters
2021 [15332] localedata: es_CU: locale update
2022 [15436] stdio: Don't close or flush stdio streams on abort
2023 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
2025 [16148] localedata: ca_ES: incorrect thousands separator
2026 [16750] dynamic-link: ldd should not try to execute the binaries
2028 [16777] localedata: pl_PL: incorrect thousands separator in locale
2029 [16905] localedata: hanzi: new collation
2030 [17563] localedata: cmn_TW: add hanzi collation
2031 [17750] localedata: wrong collation order of diacritics in most locales
2032 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
2034 [17956] build: Build fails on missing definitions from header file
2035 nss/nss.h when Mozilla NSS is used for cryptography
2036 [18203] libc: realpath() does not handle unreachable paths correctly
2037 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
2038 [18812] localedata: kab_DZ: new Kabyle Algeria locale
2039 [18822] libc: Internal functions are called via PLT
2040 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
2041 [19170] libc: __gmon_start__ defined in hppa in crtn.S
2042 [19574] libc: glibc should support building static PIE binaries
2043 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
2045 [19971] glob: glob: Do not skip entries with zero d_ino values
2046 [19982] localedata: fr.po: spelling mistake for error code EXDEV
2047 [20008] localedata: km_KH: convert to translit_neutral
2048 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
2049 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
2050 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
2051 [20482] localedata: de_CH: abbreviated weekdays should be two letters
2052 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
2054 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
2055 they're set, wrong errors returned by gaih_inet when lookup functions
2057 [20756] localedata: [PATCH] Use Unicode wise thousands separator
2058 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
2060 [20952] localedata: yuw_PG: new locale
2061 [21084] localedata: charmaps/IBM858: new codepage
2062 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
2063 [21242] libc: assert gives pedantic warning in old gcc versions
2064 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
2065 __regcall calling convention
2066 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
2067 [21326] libc: C99 functions are not declared for C++11 and later if
2068 _GNU_SOURCE is not predefined by g++
2069 [21457] libc: sys/ucontext.h namespace
2070 [21530] libc: tmpfile() should be implemented using O_TMPFILE
2071 [21660] math: GCC fails to compile a formula with tgmath.h
2072 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
2073 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
2074 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
2075 [21684] math: tgmath.h handling of complex integers
2076 [21685] math: tgmath.h handling of bit-fields
2077 [21686] math: tgmath.h handling of __int128
2078 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2080 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
2082 [21750] localedata: column width of characters incompatible with classical
2084 [21754] malloc: malloc: Perform as little work as possible after heap
2085 consistency check failures
2086 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
2087 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
2088 [21791] string: Unused XXX_chk_XXX functions in libc.a
2089 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
2091 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
2093 [21845] localedata: Added new Locale bho_NP
2094 [21853] localedata: Fix abday Which looks same as day in zh_SG
2095 [21854] localedata: Added New Locale en_SC
2096 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
2097 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
2098 _dl_runtime_resolve_avx_slow
2099 [21885] network: getaddrinfo: gethosts does not release resolver context
2100 on memory allocation failure
2101 [21899] libc: XPG4.2 sigaction namespace
2102 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
2104 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
2106 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
2107 errno value, causing getaddrinfo to fail
2108 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
2109 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
2110 instead of EAI_NODATA
2111 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
2112 constant PTRACE_SEIZE_DEVEL
2113 [21930] math: C-only gcc builtins used in <math.h> isinf
2114 [21932] network: Unpaired __resolv_context_get in generic get*_r
2116 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
2117 [21944] libc: sigval namespace
2118 [21951] localedata: Update hanzi collation by stroke
2119 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
2120 sysdeps/x86_64/fpu/e_expf.S
2121 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
2122 allocation in syscall loops)
2123 [21959] localedata: Fix Country name for xh_ZA
2124 [21960] localedata: Fix abmon for bem_ZM
2125 [21966] math: AVX2 mathvec functions use FMA without checking
2126 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
2127 [21971] localedata: Added New Locale for mfe_MU
2128 [21972] libc: assert macro requires operator== (int) for its argument type
2129 [21973] math: [sparc] libm missing sqrtl compat symbol
2130 [21974] libc: Remove __bb_init_func and __bb_exit_func
2131 [21982] string: stratcliff.c: error: assuming signed overflow does not
2133 [21986] stdio: __guess_grouping is called incorrectly
2134 [21987] math: [sparc32] wrong bits/long-double.h installed
2135 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
2137 [22022] localedata: Missing country_name for mni_IN
2138 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
2140 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
2142 [22026] locale: iconv_open: heap overflow on gconv_init failure
2143 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
2144 [22035] math: [m68k] bits/math-inline.h macro namespace
2145 [22038] localedata: Fix abbreviated weeks and months for Somali
2146 [22044] localedata: Remove redundant data for Limburgish Language
2147 [22050] malloc: Linking with -lmcheck does not hook
2148 __malloc_initialize_hook correctly
2149 [22051] libc: zero terminator in the middle of glibc's .eh_frame
2150 [22052] malloc: malloc failed to compile with GCC 7 and -O3
2151 [22070] localedata: charmaps/UTF-8: wcwidth for
2152 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
2153 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
2154 Jungseong and Jongseong) should be 0
2155 [22078] nss: nss_files performance issue in multi mode
2156 [22082] math: bits/math-finite.h exp10 condition
2157 [22086] libc: pcprofiledump incorrect cross-endian condition
2158 [22093] dynamic-link: ld.so no longer searches in .../x86_64
2159 [22095] network: Name server address allocation memory leak in resolv.conf
2161 [22096] network: __resolv_conf_attach can incorrectly free passed conf
2163 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
2164 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
2166 [22111] malloc: malloc: per thread cache is not returned when thread exits
2167 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
2168 [22134] libc: [linux] implement fexecve with execveat
2169 [22142] libc: [powerpc] printf outputs a wrong value of DBL_MAX on ppc64 and
2171 [22145] libc: ttyname() gives up too early in the face of namespaces
2172 [22146] math: C++ build issue with float128 on x86_64
2173 [22153] nptl: nptl: save error code before process termination
2174 [22156] libc: [hppa,ia64,microblaze] Executable stack default
2175 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
2176 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
2177 [22165] libc: [hppa] Text relocations in libc.so
2178 [22180] libc: destructor registered via __cxa_atexit is called twice
2179 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
2180 symlinks") cause "make" segfaults
2181 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
2183 [22207] libc: FAIL: stdlib/test-atexit-race
2184 [22225] math: nearbyint arithmetic moved before feholdexcept
2185 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
2186 [22235] math: iscanonical in C++ and float128
2187 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
2188 the svid compat wrapper
2189 [22244] math: ynf and yn are wrong without the svid compat wrapper
2190 [22273] libc: Improper assert in Linux posix_spawn implementation
2191 [22284] libc: -pg -pie doesn't work
2192 [22292] locale: localedef exits with error 4 when it should be error 1
2193 [22294] locale: Allow "" for int_currency_symbol definition in locales.
2194 [22295] locale: Don't warn on non-symbolic characters in locale sources in
2196 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
2197 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
2199 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
2200 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
2201 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
2202 [22322] libc: [mips64] wrong bits/long-double.h installed
2203 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
2204 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
2206 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
2207 [22343] malloc: Integer overflow in posix_memalign
2208 [22347] libc: getrandom() returns the number of bytes that were copied to
2209 the buffer even though the comments say "Return 0 on success and -1 on
2211 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
2212 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
2214 [22370] dynamic-link: Incorrect note padding check
2215 [22375] libc: malloc returns pointer from tcache_get when should return
2216 NULL (CVE-2017-17426)
2217 [22377] math: iseqsig, float128 and C++
2218 [22382] localedata: Error in tpi_PG locale
2219 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
2220 inside the ASCII printable range
2221 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
2223 [22403] localedata: Slash needs escaping in some locales
2224 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
2225 [22409] network: res_hnok does not accept some host names used on the
2227 [22412] network: res_dnok, res_hnok should perform syntax checks
2228 [22413] network: ns_name_pton ignores syntactically invalid trailing
2230 [22415] stdio: setvbuf can lead to invalid free/segfault
2231 [22432] build: Non-deterministic build
2232 [22439] malloc: malloc_info should compute summary statistics for all sub-
2234 [22442] network: if_nametoindex could report index for the wrong
2235 networking interface
2236 [22446] build: aliasing violation calling readlink in handle_request
2237 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
2238 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
2239 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
2240 __nscd_hash/__nss_hash
2241 [22463] network: p_secstodate overflow handling
2242 [22469] localedata: pl_PL LC_COLLATE does not use i18n
2243 [22478] libc: sigwait can fail with EINTR
2244 [22505] libc: ldconfig processes include directive in locale-specific
2246 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
2247 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
2248 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
2249 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
2250 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
2251 [22534] localedata: Collation rules for Serbian and Bosnian should be the
2252 same as for Croatian
2253 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
2254 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
2255 [22577] libc: missing newline after "cannot allocate TLS data structures
2257 [22588] manual: manual/conf.texi: missing underscore in front of
2259 [22593] math: nextafter and nexttoward are declared with const attribute
2260 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
2261 [22603] string: ia64 memchr overflows internal pointer check
2262 [22605] libc: SH clone does not set the exit code correctly
2263 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
2265 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
2266 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
2267 modified in case of success
2268 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
2269 [22615] manual: manual: ambiguous wording about errno value in case of
2271 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
2273 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
2274 binaries or if /proc is not mounted (CVE-2017-16997)
2275 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
2276 [22630] build: $(no-pie-ldflag) is no longer effective
2277 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
2278 [22635] nptl: pthread_self returns NULL before libpthread is loaded
2279 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
2280 [22637] nptl: guard size is subtracted from thread stack size instead of
2282 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
2283 [22657] localedata: hu_HU: Avoid double space in date
2284 [22660] math: fmax, fmin sNaN handling on alpha
2285 [22664] libc: New warning of GCC8
2286 [22665] math: alpha: ceil and floor raise inexact exceptions
2287 [22666] math: alpha: trunc raise inexact exceptions
2288 [22667] libc: makecontext lacks stack alignment on i386
2289 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
2290 [22679] libc: getcwd(3) can succeed without returning an absolute path
2292 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
2293 elision and tunables
2294 [22687] math: [powerpc-nofpu] complex long double functions spurious
2296 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
2297 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
2298 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
2300 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
2301 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
2303 [22701] nis: Incomplete removal of libnsl
2304 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
2305 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
2306 [22715] dynamic-link: FAIL: elf/tst-audit10
2307 [22719] libc: Backtrace tests fail on hppa
2308 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
2309 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
2310 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
2311 before the first call to crypt_r () in crypt/badsalttest.c
2318 * A per-thread cache has been added to malloc. Access to the cache requires
2319 no locks and therefore significantly accelerates the fast path to allocate
2320 and free small amounts of memory. Refilling an empty cache requires locking
2321 the underlying arena. Performance measurements show significant gains in a
2322 wide variety of user workloads. Workloads were captured using a special
2323 instrumented malloc and analyzed with a malloc simulator. Contributed by
2324 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2326 * Unicode 10.0.0 Support: Character encoding, character type info, and
2327 transliteration tables are all updated to Unicode 10.0.0, using
2328 generator scripts contributed by Mike FABIAN (Red Hat).
2329 These updates cause user visible changes, especially the changes in
2330 wcwidth for many emoji characters cause problems when emoji sequences
2331 are rendered with pango, see for example:
2332 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2334 * Collation of Hungarian has been overhauled and is now consistent with "The
2335 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2338 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2340 - The GNU C Library will now detect when /etc/resolv.conf has been
2341 modified and reload the changed configuration. The new resolver option
2342 “no-reload” (RES_NORELOAD) disables this behavior.
2344 - The GNU C Library now supports an arbitrary number of search domains
2345 (configured using the “search” directive in /etc/resolv.conf);
2346 previously, there was a hard limit of six domains. For backward
2347 compatibility, applications that directly modify the ‘_res’ global
2348 object are still limited to six search domains.
2350 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2351 Library will now randomly pick a name server from the configuration as a
2352 starting point. (Previously, the second name server was always used.)
2354 * The tunables feature is now enabled by default. This allows users to tweak
2355 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2357 * New function reallocarray, which resizes an allocated block (like realloc)
2358 to the product of two sizes, with a guaranteed clean failure upon integer
2359 overflow in the multiplication. Originally from OpenBSD, contributed by
2360 Dennis Wölfing and Rüdiger Sonderfeld.
2362 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2363 These are extended versions of preadv and pwritev, respectively, taking an
2364 additional flags argument. The set of supported flags depends on the
2365 running kernel; full support currently requires kernel 4.7 or later.
2367 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2368 create a new session ID for the spawned process. This feature is
2369 scheduled to be added to the next major revision of POSIX; for the time
2370 being, it is available under _GNU_SOURCE.
2372 * errno.h is now safe to use from C-preprocessed assembly language on all
2373 supported operating systems. In this context, it will only define the
2374 Exxxx constants, as preprocessor macros expanding to integer literals.
2376 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2377 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2378 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2379 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2381 To compile programs that use this feature, the compiler must support
2382 128-bit floating point with the type name _Float128 (as defined by TS
2383 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2384 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2385 must be defined to make the new interfaces visible.
2387 The new functions and macros correspond to those present for other
2388 floating-point types (except for a few obsolescent interfaces not
2389 supported for the new type), with F128 or f128 suffixes; for example,
2390 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2391 printf or scanf formats for the new type; the strfromf128 and strtof128
2392 interfaces should be used instead.
2394 Deprecated and removed features, and other changes affecting compatibility:
2396 * The synchronization that pthread_spin_unlock performs has been changed to
2397 now be equivalent to a C11 atomic store with release memory order to the
2398 spin lock's memory location. Previously, several (but not all)
2399 architectures used stronger synchronization (e.g., containing what is
2400 often called a full barrier). This change can improve performance, but
2401 may affect odd fringe uses of spin locks that depend on the previous
2402 behavior (e.g., using spin locks as atomic variables to try to implement
2403 Dekker's mutual exclusion algorithm).
2405 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2408 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2409 will only be built and installed when the GNU C Library is configured with
2410 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2411 as TIRPC or rpcsvc-proto, to be used.
2413 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2414 libnss_compat, are deprecated, and will not be built or installed by
2417 The NIS(+) support library, libnsl, is also deprecated. By default, a
2418 compatibility shared library will be built and installed, but not headers
2419 or development libraries. Only a few NIS-related programs require this
2420 library. (In particular, the GNU C Library has never required programs
2421 that use 'gethostbyname' to be linked with libnsl.)
2423 Replacement implementations based on TIRPC, which additionally support
2424 IPv6, are available from <https://github.com/thkukuk/>. The configure
2425 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2426 name service modules, to be built and installed.
2428 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2429 support is enabled, the configured recursive resolver must support EDNS.
2430 (Responding to EDNS-enabled queries with responses which are not
2431 EDNS-enabled is fine, but FORMERR responses are not.)
2433 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2434 servers have not supported this opcode for a long time.
2436 * The _res_opcodes variable has been removed from libresolv. It had been
2437 exported by accident.
2439 * <string.h> no longer includes inline versions of any string functions,
2440 as this kind of optimization is better done by the compiler. The macros
2441 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2443 * The nonstandard header <xlocale.h> has been removed. Most programs should
2444 use <locale.h> instead. If you have a specific need for the definition of
2445 locale_t with no other declarations, please contact
2446 libc-alpha@sourceware.org and explain.
2448 * The obsolete header <sys/ultrasound.h> has been removed.
2450 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2452 * The obsolete function cfree has been removed. Applications should use
2455 * The stack_t type no longer has the name struct sigaltstack. This changes
2456 the C++ name mangling for interfaces involving this type.
2458 * The ucontext_t type no longer has the name struct ucontext. This changes
2459 the C++ name mangling for interfaces involving this type.
2461 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2462 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2463 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2464 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2465 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2466 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2467 fpregset_t type no longer has the name struct fpu. This changes the C++
2468 name mangling for interfaces involving those types.
2470 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2471 synced with the kernel:
2473 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2474 are not supported on this architecture and have been removed.
2476 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2477 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2478 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2480 Programs that assume the GET/SETREGS ptrace requests are universally
2481 available will now fail to build, instead of malfunctioning at runtime.
2483 Changes to build and runtime requirements:
2485 * Linux kernel 3.2 or later is required at runtime, on all architectures
2486 supported by that kernel. (This is a change from version 2.25 only for
2489 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2491 * On most architectures, GCC 4.9 or later is required to build the GNU C
2492 Library. On powerpc64le, GCC 6.2 or later is required.
2494 Older GCC versions and non-GNU compilers are still supported when
2495 compiling programs that use the GNU C Library. (We do not know exactly
2496 how old, and some GNU extensions to C may be _de facto_ required. If you
2497 are interested in helping us make this statement less vague, please
2498 contact libc-alpha@sourceware.org.)
2500 Security related changes:
2502 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2503 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2505 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2506 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2508 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2509 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2512 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2513 fixed (CVE-2017-12133).
2515 The following bugs are resolved with this release:
2517 [984] network: Respond to changed resolv.conf in gethostbyname
2518 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2519 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2521 [12189] libc: __stack_chk_fail should not attempt a backtrace
2523 [14096] time: Race condition on timezone/tst-timezone.out
2524 [14172] localedata: az_IR: new locale
2525 [14995] build: glibc fails to build if gold is the default linker, even if
2527 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2528 [16637] network: inet_pton function is accepting IPv6 with bad format
2529 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2530 x86 and other generic code
2531 [16875] localedata: ko_KR: fix lang_name
2532 [17225] localedata: ar_SY: localized month names for May and June are
2534 [17297] localedata: da_DK: wrong date_fmt string
2535 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2536 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2537 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2538 [19066] localedata: ar_SA abbreviated day and month names are in English
2539 [19569] network: resolv: Support an arbitrary number of search domains
2540 [19570] network: Implement random DNS server selection in the stub
2542 [19838] locale: localedef fails on PA-RISC
2543 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2544 order of 0D36 and 0D37
2545 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2547 [20098] libc: FAIL: debug/backtrace-tst on hppa
2548 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2550 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2552 [20313] localedata: Update locale data to Unicode 9.0
2553 [20424] manual: Document how to provide a malloc replacement
2554 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2556 [20686] locale: Add el_GR@euro to SUPPORTED.
2557 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2558 failures consistently
2559 [21015] dynamic-link: Document and fix --enable-bind-now
2560 [21016] nptl: pthread_cond support is broken on hppa
2561 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2562 frame-pointer on i386
2563 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2565 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2566 [21088] libc: Build fails with --enable-static-nss
2567 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2568 generic c code is used
2569 [21109] libc: Tunables broken on big-endian
2570 [21112] math: powf has large ulp errors with base close to 1 and exponent
2572 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2574 [21120] malloc: glibc malloc is incompatible with GCC 7
2575 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2577 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2578 (-0.0) when linking with -lieee
2579 [21171] math: log10, log2 and lgamma return incorrect results
2580 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2581 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2582 [21207] localedata: ce_RU: update weekdays from CLDR
2583 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2584 [21217] localedata: Update months from CLDR-31
2585 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2586 [21243] libc: support_delete_temp_file should issue warning for failed
2588 [21244] libc: support resolv_test_start() socket fd close should be
2590 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2591 new posix_spawn implementation
2592 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2593 leads to lower CPU frequency
2594 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2595 [21261] libc: [sparc64] bits/setjmp.h namespace
2596 [21267] network: [mips] bits/socket.h IOC* namespace
2597 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2598 [21270] libc: mmap64 silently truncates large offset values
2599 [21275] libc: posix_spawn always crashes on ia64 now
2600 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2601 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2602 [21289] libc: Incorrect declaration for 32-bit platforms with
2603 _FILE_OFFSET_BITS=64 causes build error
2604 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2605 not support gethostbyname4_r
2606 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2608 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2610 [21340] libc: Support POSIX_SPAWN_SETSID
2611 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2612 [21359] network: ns_name_pack needs additional byte in destination buffer
2613 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2614 against fragmentation attacks (CVE-2017-12132)
2615 [21369] network: resolv: Remove EDNS fallback
2616 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2618 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2619 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2620 [21393] stdio: Missing dup3 error check in freopen, freopen64
2621 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2622 [21399] localedata: Bad description for U00EC in
2623 localedata/charmaps/CP1254
2624 [21411] malloc: realloc documentation error
2625 [21426] network: sys/socket.h uio.h namespace
2626 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2627 [21445] libc: signal.h bsd_signal namespace
2628 [21455] network: Network headers stdint.h namespace
2629 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2631 [21475] network: resolv: Overlong search path is truncated mid-label
2632 [21511] libc: sigstack namespace
2633 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2634 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2635 bits/syscall.h: No such file or directory
2636 [21517] libc: struct sigaltstack namespace
2637 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2638 [21533] localedata: Update locale data to Unicode 10.0
2640 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2641 junk at end of line, first unrecognized character is `@'
2642 [21538] libc: SIG_HOLD missing for XPG4
2643 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2644 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2645 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2646 [21543] libc: sigevent namespace
2647 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2648 size for general purpose registers in mcontext_t structure
2649 [21550] libc: sigwait namespace
2650 [21552] libc: XPG4 bsd_signal namespace
2651 [21554] libc: sigpause namespace
2652 [21560] libc: sys/wait.h signal.h namespace
2653 [21561] libc: waitid namespace
2654 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2655 '/usr/include/stdlib.h': Permission denied
2656 [21575] libc: sys/wait.h missing struct rusage definition
2657 [21584] libc: sigaltstack etc namespace
2658 [21597] libc: siginterrupt namespace
2659 [21607] math: hppa: FAIL: math/test-tgmath
2660 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2662 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2663 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2664 stack and heap (CVE-2017-1000366)
2665 [21625] libc: wait3 namespace
2666 [21654] nss: Incorrect pointer alignment in NSS group merge result
2668 [21657] network: Parse interface zone id for node-local multicast
2669 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2671 [21666] libc: .symver is used on common symbol
2672 [21668] network: resolv: res_init cross-thread broadcast introduces race
2674 [21687] math: tgmath.h totalorder, totalordermag return type
2675 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2677 [21696] libc: Incorrect assumption of of __cpu_mask in
2678 posix/sched_cpucount.c
2679 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2680 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2682 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2683 leading to relocation crash
2684 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2685 `resolv_conf_matches (resp, conf)' failed.
2686 [21710] localedata: Added Samoan language locale for Samoa
2687 [21711] localedata: Pashto yesstr/nostr locale are missing
2688 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2689 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2690 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2691 [21723] localedata: yesstr/nostr missing for Chinese language locale
2692 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2694 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2696 [21728] localedata: New Locale for Tongan language
2697 [21729] localedata: incorrect LC_NAME fields for hi_IN
2698 [21733] localedata: yesstr and nostr are missing for zh_HK
2699 [21734] localedata: Missing yesstr and nostr are for kw_GB
2700 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2701 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2702 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2703 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2705 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2707 [21749] localedata: Wrong abbreviated day name (“abday”) for
2709 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2710 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2711 [21759] localedata: missing yesstr and nostr for Tigrinya
2712 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2713 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2714 [21767] localedata: Missing Bislama locales
2715 [21768] localedata: Missing yesstr and nostr for aa_ET
2716 [21770] localedata: Missing Field in li_NL
2717 [21778] nptl: Robust mutex may deadlock
2718 [21779] libc: MicroBlaze segfaults when loading libpthread
2719 [21783] localedata: Fix int_select international_call_prefixes
2720 [21784] localedata: Inconsistency in country_isbn
2721 [21788] localedata: Missing Country Postal Abbreviations
2722 [21794] localedata: Added-country_isbn-for-Italy
2723 [21795] localedata: Add/Fix country_isbn for France
2724 [21796] localedata: Added country_isbn for Republic of Korea
2725 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2726 [21799] localedata: Added int_select international_call_prefixes
2727 [21801] localedata: Added int_select international_call_prefixes
2728 [21804] nptl: Double semicolon in thread-shared-types.h
2729 [21807] localedata: LC_ADDRESS fix for pap_CW
2730 [21808] localedata: Fix LC_ADDRESS for pap_AW
2731 [21821] localedata: Added country_name in mai_IN
2732 [21822] localedata: Fix LC_TIME for mai_IN
2733 [21823] localedata: missing yesstr, nostr for sa_IN
2734 [21825] localedata: Fix name_mrs for mag_IN
2735 [21828] localedata: 2.26 changelog should mention user visible changes
2737 [21835] localedata: Added Maithili language locale for Nepal
2738 [21838] localedata: Removed redundant data for the_NP
2739 [21839] localedata: Fix LC_MONETARY for ta_LK
2740 [21844] localedata: Fix Latin characters and Months Sequence.
2741 [21848] localedata: Fix mai_NP Title Name
2746 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2747 24731-2:2010, is supported to enable declarations of functions from that
2748 TR. Note that not all functions from that TR are supported by the GNU C
2751 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2752 18661-1:2014, is supported to enable declarations of functions and macros
2753 from that TS. Note that not all features from that TS are supported by
2756 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2757 18661-4:2015, is supported to enable declarations of functions and macros
2758 from that TS. Note that most features from that TS are not supported by
2761 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2762 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2763 Since the GNU C Library defaults to a much newer revision of POSIX, this
2764 will only affect programs that specifically request an old conformance
2765 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2766 see a change in the visible declarations, but a program compiled with
2767 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2770 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2771 defined by all multithreaded code, but glibc has not required this for
2774 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2775 means that in a future release, the macros “major”, “minor”, and “makedev”
2776 will only be available from <sys/sysmacros.h>.
2778 These macros are not part of POSIX nor XSI, and their names frequently
2779 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2780 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2781 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2784 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2785 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2786 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2788 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2789 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2790 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2791 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2792 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2793 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2794 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2795 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2796 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2797 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2798 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2801 * New <math.h> features are added from TS 18661-1:2014:
2803 - Signaling NaN macros: SNANF, SNAN, SNANL.
2805 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2806 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2807 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2809 - llogb functions: the llogb, llogbf and llogbl functions, and the
2810 FP_LLOGB0 and FP_LLOGBNAN macros.
2812 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2815 - Comparison macros: iseqsig.
2817 - Classification macros: iscanonical, issubnormal, iszero.
2819 - Total order functions: totalorder, totalorderf, totalorderl,
2820 totalordermag, totalordermagf, totalordermagl.
2822 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2824 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2825 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2827 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2828 are added to libc. They convert a floating-point number into string.
2830 * Most of glibc can now be built with the stack smashing protector enabled.
2831 It is recommended to build glibc with --enable-stack-protector=strong.
2832 Implemented by Nick Alcock (Oracle).
2834 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2835 intended to be used instead of memset() to erase sensitive data after use;
2836 the compiler will not optimize out calls to explicit_bzero even if they
2837 are "unnecessary" (in the sense that no _correct_ program can observe the
2838 effects of the memory clear).
2840 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2841 to float instead of double. This does not affect the ABI of any libraries
2842 that are part of the GNU C Library, but may affect the ABI of other
2843 libraries that use this type in their interfaces.
2845 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2846 float_t and double_t types are now defined to long double instead of float
2847 and double. These options are not the default, and this does not affect
2848 the ABI of any libraries that are part of the GNU C Library, but it may
2849 affect the ABI of other libraries that use this type in their interfaces,
2850 if they are compiled or used with those options.
2852 * The getentropy and getrandom functions, and the <sys/random.h> header file
2855 * The buffer size for byte-oriented stdio streams is now limited to 8192
2856 bytes by default. Previously, on Linux, the default buffer size on most
2857 file systems was 4096 bytes (and thus remains unchanged), except on
2858 network file systems, where the buffer size was unpredictable and could be
2859 as large as several megabytes.
2861 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2862 for the Linux quota interface which predates kernel version 2.4.22 has
2865 * The malloc_get_state and malloc_set_state functions have been removed.
2866 Already-existing binaries that dynamically link to these functions will
2867 get a hidden implementation in which malloc_get_state is a stub. As far
2868 as we know, these functions are used only by GNU Emacs and this change
2869 will not adversely affect already-built Emacs executables. Any undumped
2870 Emacs executables, which normally exist only during an Emacs build, should
2871 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2873 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2874 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2875 “no-ip6-dotint” had already been the default, and support for the
2876 “ip6-dotint” option was removed from the Internet in 2006.
2878 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2879 flag from <resolv.h> have been removed. The option relied on a
2880 backwards-incompatible DNS extension which was never deployed on the
2883 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2884 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2885 They were already unimplemented.
2887 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2888 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2889 removed again from the IETF name lookup interface specification in RFC
2890 2553. Applications should use getaddrinfo instead.
2892 * DNSSEC-related declarations and definitions have been removed from the
2893 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2894 decode the data part of DNSSEC record types. Previous versions of glibc
2895 only implemented minimal support for the previous version of DNSSEC, which
2896 is incompatible with the currently deployed version.
2898 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2899 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2900 <arpa/nameser.h> header file because the distinction between RR types and
2901 meta-RR types is not officially standardized, subject to revision, and
2902 thus not suitable for encoding in a macro.
2904 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2905 and rhook members of the res_state type in <resolv.h> have been removed.
2906 The glibc stub resolver did not support these hooks, but the header file
2907 did not reflect that.
2909 * For multi-arch support it is recommended to use a GCC which has
2910 been built with support for GNU indirect functions. This ensures
2911 that correct debugging information is generated for functions
2912 selected by IFUNC resolvers. This support can either be enabled by
2913 configuring GCC with '--enable-gnu-indirect-function', or by
2914 enabling it by default by setting 'default_gnu_indirect_function'
2915 variable for a particular architecture in the GCC source file
2918 * GDB pretty printers have been added for mutex and condition variable
2919 structures in POSIX Threads. When installed and loaded in gdb these pretty
2920 printers show various pthread variables in human-readable form when read
2921 using the 'print' or 'display' commands in gdb.
2923 * Tunables feature added to allow tweaking of the runtime for an application
2924 program. This feature can be enabled with the '--enable-tunables' configure
2925 flag. The GNU C Library manual has details on usage and README.tunables has
2926 instructions on adding new tunables to the library.
2928 * A new version of condition variables functions have been implemented in
2929 the NPTL implementation of POSIX Threads to provide stronger ordering
2932 * A new version of pthread_rwlock functions have been implemented to use a more
2933 scalable algorithm primarily through not using a critical section anymore to
2936 Security related changes:
2938 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2939 have been created with makecontext could fail to terminate due to a
2940 missing .cantunwind annotation. This has been observed to lead to a hang
2941 (denial of service) in some Go applications compiled with gccgo. Reported
2942 by Andreas Schwab. (CVE-2016-6323)
2944 * The DNS stub resolver functions would crash due to a NULL pointer
2945 dereference when processing a query with a valid DNS question type which
2946 was used internally in the implementation. The stub resolver now uses a
2947 question type which is outside the range of valid question type values.
2950 The following bugs are resolved with this release:
2952 [4099] stdio: Overly aggressive caching by stream i/o functions.
2953 [7065] build: Support building glibc with -fstack-protector or -fstack-
2955 [9842] localedata: en_CA: incorrect date format
2956 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2957 before it started waiting
2958 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2959 [15765] nptl: sem_open is wrongly a cancellation point
2960 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2961 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2963 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2964 library linked with pthread
2965 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2966 "FIXME: Ingo" issue)
2967 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2968 [17252] libc: getrandom and getentropy syscall
2969 [17730] malloc: thread-local storage is sometimes improperly free()'d
2970 after being __libc_memalign()'d
2971 [18241] stdio: failed fseek on memstream does not set errno and can fail
2973 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2975 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2976 PTHREAD_PRIO_INHERIT mutex on ARM
2977 [18784] network: res_query and related function crash for special record
2978 type queries (CVE-2015-5180)
2979 [19380] math: strtod does not raise "inexact"
2980 [19387] string: Integer overflow in memchr
2981 [19390] string: Integer overflow in strncat
2982 [19398] build: linknamespace tests fail with massively parallel build
2983 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2985 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2986 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2987 [19514] libc: [PATCH] Fix spelling errors in spelling
2988 "implement"/"implementation" in several places
2989 [19582] network: Deprecate RES_USE_INET6
2990 [19673] manual: clog10 docs appear to be erroneous
2991 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2992 causes a segmentation fault
2993 [19826] libc: invalid pointer returned from __tls_get_addr with static
2995 [20016] network: resolv: Remove hooks support from the API
2996 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2998 [20033] math: [x86_64] vectorized math function don't call the __finite
3000 [20116] nptl: use after free in pthread_create
3001 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
3002 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
3004 [20311] nptl: please install proc_service.h
3005 [20366] libc: Compilation errors in installed headers in strict-compliance
3007 [20370] malloc: malloc: Arena free list management is still racy
3008 (incorrect fix in bug 19243)
3009 [20386] libc: assert (X = 0) does not result in GCC warning
3010 [20432] malloc: malloc: Minimize interface required for interposition
3011 [20435] libc: Missing unwind info in __startcontext causes infinite loop
3012 in _Unwind_Backtrace (CVE-2016-6323)
3013 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
3014 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
3016 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
3017 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
3018 [20477] network: resolv: incorrect double-checked locking related to
3020 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
3022 [20495] math: x86_64 performance degradation due to AVX/SSE transition
3024 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
3025 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
3026 cause transition penalty
3027 [20517] math: sparcv9 missing fdiml compat symbol
3028 [20524] manual: strverscmp is inconsistent
3029 [20525] libc: <sys/quota.h> should be based on kernel headers
3030 [20539] math: GCC 7 -static -lm fails to link at -O3
3031 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
3033 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
3035 [20591] network: Remove obsolete DNSSEC support
3036 [20592] network: DNS resource record type classification macros in
3037 <arpa/nameser.h> are incorrect
3038 [20593] network: Update DNS RR type definitions
3039 [20611] network: getaddrinfo accepts invalid numeric scope IDs
3040 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
3042 [20629] network: libresolv: Remove support for bitstring labels
3044 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
3045 assertion: "maxidx >= 2"
3046 [20660] math: [arm] Use VSQRT
3047 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
3048 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
3049 [20689] libc: Test for FMA should also check for AVX.
3050 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
3051 [20715] math: iszero macro breaks existing code
3052 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
3053 [20728] libc: powerpc: Missing TOC stub in clone
3054 [20729] build: glibc-2.24 fails to build for i486 with -Os
3055 [20750] build: Build fails with default PIE enabled gcc-6.x
3056 [20768] math: [alpha] sqrt fegetenv namespace
3057 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
3059 [20787] math: float_t is defined as float incorrectly on x86_64 even if
3060 __FLT_EVAL_METHOD__ is 2
3061 [20790] network: rpcgen buffer overrun in get_prog_declaration
3062 [20822] nptl: race condition in __lll_unlock_elision on powerpc
3063 [20829] libc: crypt snprintf namespace
3064 [20847] libc: tst-vfork3 failure
3065 [20855] math: Default bits/mathdef.h has inappropriate float_t
3066 [20859] math: [sh4] FP_ILOGB0 invalid
3067 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
3068 U+20AC), not same as GBK
3069 [20915] dynamic-link: global-dynamic TLS broken on aarch64
3070 [20916] math: pow handling of sNaN arguments
3071 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
3072 [20919] math: Bad pow (qNaN, 0) result with -lieee
3073 [20940] math: hypot sNaN handling
3074 [20947] math: fmax, fmin sNaN handling
3075 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
3076 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
3078 [20971] string: powerpc64/power7 memchr overflows internal pointer check
3079 [20973] nptl: robust mutexes: Lost wake-ups
3080 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
3081 [20978] nis: strlen on null pointer in nss_nisplus
3082 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
3084 [21014] string: i686 memchr overflows internal pointer check
3085 [21019] libc: [mips] n32 lseek incorrect on overflow
3086 [21022] libc: [microblaze] __backtrace get_frame_size namespace
3087 [21026] libc: [MIPS] readahead syscall is broken on n64
3088 [21028] math: Fallback fesetexceptflag should always succeed
3089 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
3090 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
3092 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
3093 [21061] librt: [microblaze] librt lost clock_* exports
3094 [21073] libc: tunables: insecure environment variables passed to
3095 subprocesses with AT_SECURE
3096 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
3100 * The minimum Linux kernel version that this version of the GNU C Library
3101 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
3102 kernel version 2.6.32 or later suffices (on architectures that already
3103 required kernel versions more recent than 3.2, those requirements remain
3104 unchanged). Linux 3.2 or later kernel headers are required on all
3107 * The pap_AN locale has been deleted. This has been deprecated for a long
3108 time. It has been replaced by pap_AW & pap_CW, both of which have long
3109 been included in previous releases.
3111 * The readdir_r and readdir64_r functions have been deprecated. It is
3112 recommended to use readdir and readdir64 instead.
3114 * The type “union wait” has been removed. It was deprecated in the early
3115 1990s and never part of POSIX. Application code should use the int type
3116 instead of “union wait”.
3118 * A new NSS action is added to facilitate large distributed system
3119 administration. The action, MERGE, allows remote user stores like LDAP
3120 to be merged into local user stores like /etc/groups in order to provide
3121 easy to use, updated, and managed sets of merged credentials. The new
3122 action can be used by configuring it in /etc/nsswitch.conf:
3123 group: files [SUCCESS=merge] nis
3124 Implemented by Stephen Gallagher (Red Hat).
3126 * The deprecated __malloc_initialize_hook variable has been removed from the
3129 * The long unused localedef --old-style option has been removed. It hasn't
3130 done anything in over 16 years. Scripts using this option can safely
3133 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
3134 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
3135 return the next representable value in the direction of positive infinity
3136 and the nextdown functions return the next representable value in the
3137 direction of negative infinity. These are currently enabled as GNU
3140 Security related changes:
3142 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
3143 could result in a stack overflow when getnetbyname was called with an
3144 overly long name. (CVE-2016-3075)
3146 * Previously, getaddrinfo copied large amounts of address data to the stack,
3147 even after the fix for CVE-2013-4458 has been applied, potentially
3148 resulting in a stack overflow. getaddrinfo now uses a heap allocation
3149 instead. Reported by Michael Petlan. (CVE-2016-3706)
3151 * The glob function suffered from a stack-based buffer overflow when it was
3152 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
3153 Reported by Alexander Cherepanov. (CVE-2016-1234)
3155 * The Sun RPC UDP client could exhaust all available stack space when
3156 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
3157 alloca plugin for GCC. (CVE-2016-4429)
3159 * The IPv6 name server management code in libresolv could result in a memory
3160 leak for each thread which is created, performs a failing naming lookup,
3161 and exits. Over time, this could result in a denial of service due to
3162 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
3164 The following bugs are resolved with this release:
3166 [1170] localedata: ne_NP: update Nepali locale definition file
3167 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
3169 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
3170 [6796] math: fdim() does not set errno on overflow
3171 [10354] libc: posix_spawn should use vfork() in more cases than presently
3172 [11213] localedata: localedata: add copyright disclaimer to locale files
3173 [12143] localedata: chr_US: new Cherokee locale
3174 [12450] localedata: sgs_LT: new locale
3175 [12676] localedata: ln_CD: new locale
3176 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
3178 [13304] math: fma, fmaf, fmal produce wrong results
3179 [14259] build: --localedir arg to configure is ignored
3180 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
3181 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
3182 [14934] localedata: es_CL: wrong first weekday chilean locale
3183 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
3185 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
3187 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
3188 [15368] nptl: raise() is not async-signal-safe
3189 [15479] math: ceil, floor, round and trunc raise inexact exception
3190 [15578] localedata: kk_KZ: various updates
3191 [16003] localedata: pap_AN: punt old locale
3192 [16137] localedata: iw_IL: punt old locale
3193 [16190] localedata: eo: new esperanto locale
3194 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
3195 [16742] malloc: race condition: pthread_atfork() called before first
3196 malloc() results in unexpected locking behaviour/deadlocks
3197 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
3199 [16983] localedata: postal_fmt does not allow %l and %n modifiers
3200 [17565] localedata: pt_PT: wrong (work-)week start
3201 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
3202 [17950] build: Build fails with -msse
3203 [18205] localedata: be_BY*: wrong first_weekday and first_workday
3204 [18433] libc: posix_spawn does not return correctly upon failure to
3206 [18453] localedata: charmaps/IBM875: incorrect codes
3207 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
3209 [18896] localedata: he_IL: improvements for currency
3210 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
3211 Romanian locale data
3212 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
3214 [19056] libc: Deprecate readdir_r
3215 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
3217 [19198] localedata: nl_NL: small improvements for Dutch locales
3218 [19257] network: Per-thread memory leak in __res_vinit with IPv6
3219 nameservers (CVE-2016-5417)
3220 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
3222 [19400] locale: Language missing in "iso-639.def", trivial fix in
3224 [19431] malloc: Deadlock between fflush, getdelim, and fork
3225 [19505] libc: Incorrect file descriptor validity checks in
3226 posix_spawn_file_actions_add{open,close,dup2}
3227 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
3228 when using RTLD_NEXT
3229 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
3230 `intl/{gettextP,loadinfo}.h'
3231 [19534] libc: execle, execlp may use malloc
3232 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
3233 [19573] network: res_nclose and __res_maybe_init disagree about name
3234 server initialization, breaking Hesiod
3235 [19575] localedata: Status of GB18030 tables
3236 [19581] localedata: sr_* date_fmt string contains additional newline
3237 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
3239 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
3240 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
3241 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
3242 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
3244 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
3246 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
3248 [19610] dynamic-link: ldconfig -X removes stale symbolic links
3249 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
3250 [19633] locale: strfmon_l applies global locale to number formatting
3251 [19642] network: Memory leak in getnameinfo
3252 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
3253 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
3255 [19654] math: [x86_64] Need testcase for BZ #19590 fix
3256 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
3258 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
3259 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
3261 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
3263 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
3265 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
3266 pointers and lengths in error-case.
3267 [19727] locale: Converting from/to UTF-xx with iconv() does not always
3268 report errors on UTF-16 surrogates values.
3269 [19755] nscd: nscd assertion failure in gc
3270 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
3271 [19759] libc: mempcpy shouldn't be inlined
3272 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
3273 [19765] libc: s390 needs an optimized mempcpy
3274 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
3275 NAME_MAX limit assumption (CVE-2016-1234)
3276 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
3277 [19787] network: Missing and incorrect truncation checks in getnameinfo
3278 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
3280 [19791] network: Assertion failure in res_query.c with un-connectable name
3282 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
3283 [19822] math: libm.so install clobbers old version
3284 [19825] network: resolv: send_vc can return uninitialized data in second
3285 response to getaddrinfo
3286 [19830] network: nss_dns: should check RDATA length against buffer length
3287 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
3288 confronted with A/AAAA records of invalid size
3289 [19837] nss: nss_db: No retries for some long lines with a larger buffer
3290 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
3291 [19853] stdio: Printing IBM long double in decimal with high precision is
3293 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
3294 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
3295 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
3297 [19865] network: Assertion failure or memory leak in
3298 _nss_dns_getcanonname_r
3299 [19868] network: nss_dns: netent code does not skip over non-PTR records
3300 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
3302 [19881] string: Improve x86-64 memset
3303 [19907] string: Incorrect memcpy tests
3304 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
3306 [19925] libc: termios.h XCASE namespace
3307 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
3308 [19929] libc: limits.h NL_NMAX namespace
3309 [19931] stdio: Memory leak in vfprintf
3310 [19957] libc: clone(CLONE_VM) access invalid parent memory
3311 [19963] localedata: en_IL: New locale
3312 [19989] stdio: stdio.h cuserid namespace
3313 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
3315 [19996] locale: langinfo.h nl_langinfo_l namespace
3316 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
3317 [20010] network: getaddrinfo: Stack overflow in hostent translation
3319 [20012] stdio: libio: fmemopen append mode failure
3320 [20014] stdio: stdio.h namespace for pre-threads POSIX
3321 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3322 [20023] libc: fcntl.h timespec namespace
3323 [20024] math: [x86_64] vectorized sincos trashes the stack
3324 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3325 [20041] time: sys/time.h timespec namespace
3326 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3327 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3328 [20051] libc: ttyslot in wrong header under wrong conditions
3329 [20054] libc: gethostname not declared for XPG4
3330 [20055] libc: termios.h missing tcgetsid for XPG4
3331 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3333 [20073] libc: sys/stat.h fchmod namespace
3334 [20074] libc: stdlib.h rand_r namespace
3335 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3336 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3338 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3339 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3341 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3342 [20119] libc: Wrong mask for processors level type from CPUID
3343 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3344 AS not supporting AVX512
3345 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3347 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3348 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3350 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3351 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3352 [20178] libc: posix_spawn{p} should not call exit
3353 [20191] stdio: libio: vtables hardening
3354 [20195] string: FMA4 detection requires CPUID execution with register
3356 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3357 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3359 [20212] math: acos (sNaN) returns sNaN
3360 [20213] math: asin (sNaN) returns sNaN
3361 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3362 [20218] math: [i386] asinhl (sNaN) returns sNaN
3363 [20219] math: [i386] atanhl (sNaN) returns sNaN
3364 [20222] stdio: fopencookie: Mangle function pointers
3365 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3366 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3367 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3369 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3370 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3371 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3372 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3373 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3374 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3375 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3376 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3377 [20240] math: modf (sNaN) returns sNaN
3378 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3379 [20250] math: frexp (sNaN) returns sNaN
3380 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3381 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3383 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3384 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3385 subscript is below array bounds [-Werror=array-bounds]
3386 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3387 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3389 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3390 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3392 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3393 "invalid" exceptions
3394 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3395 [20316] localedata: id_ID: Februari instead of Pebruari
3396 [20327] string: POWER8 strcasecmp returns incorrect result
3397 [20347] math: Failure: Test: j0_downward (0xap+0)
3398 [20348] libc: FAIL: misc/tst-preadvwritev64
3399 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3400 [20350] libc: There is no test for p{read,write}64
3401 [20357] math: Incorrect cos result for 1.5174239687223976
3402 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3406 * Unicode 8.0.0 Support: Character encoding, character type info, and
3407 transliteration tables are all updated to Unicode 8.0.0, using new
3408 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3409 These updates cause user visible changes, such as the fixes for bugs
3410 89, 16061, and 18568.
3412 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3413 kernel-internal CPU set size. This means that requests that change the
3414 CPU affinity which failed before (for example, an all-ones CPU mask) will
3415 now succeed. Applications that need to determine the effective CPU
3416 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3417 setting it because the kernel can adjust it (and the previous size check
3418 would not detect this in the majority of cases).
3420 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3421 the following new symbols are used: fts64_children, fts64_close,
3422 fts64_open, fts64_read and fts64_set.
3424 * getaddrinfo now detects certain invalid responses on an internal netlink
3425 socket. If such responses are received, an affected process will
3426 terminate with an error message of "Unexpected error <number> on netlink
3427 descriptor <number>" or "Unexpected netlink response of size <number> on
3428 descriptor <number>". The most likely cause for these errors is a
3429 multi-threaded application which erroneously closes and reuses the netlink
3430 file descriptor while it is used by getaddrinfo.
3432 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3433 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3434 unnecessary serialization of memory allocation requests across threads.
3435 The defect is now corrected. Users should see a substantial increase in
3436 the concurent throughput of allocation requests for applications which
3437 trigger this bug. Affected applications typically create and
3438 destroy threads frequently. (Bug 19048 was reported and analyzed by
3441 * There is now a --disable-timezone-tools configure option for disabling the
3442 building and installing of the timezone related utilities (zic, zdump, and
3443 tzselect). This is useful for people who build the timezone data and code
3444 independent of the GNU C Library.
3446 * The obsolete header <regexp.h> has been removed. Programs that require
3447 this header must be updated to use <regex.h> instead.
3449 * The obsolete functions bdflush, create_module, get_kernel_syms,
3450 query_module and uselib are no longer available to newly linked binaries;
3451 the header <sys/kdaemon.h> has been removed. These functions and header
3452 were specific to systems using the Linux kernel and could not usefully be
3453 used with the GNU C Library on systems with version 2.6 or later of the
3456 * Optimized string, wcsmbs and memory functions for IBM z13.
3457 Implemented by Stefan Liebler.
3459 * Newly linked programs that define a variable called signgam will no longer
3460 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3461 require signgam to be set by those functions must ensure that they use the
3462 variable provided by the GNU C Library and declared in <math.h>, without
3463 defining their own copy.
3465 * The minimum GCC version that can be used to build this version of the GNU
3466 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3467 still be used to compile programs using the GNU C Library.
3469 Security related changes:
3471 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3472 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3474 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3475 the pointer guard feature. It is always enabled. Previously,
3476 LD_POINTER_GUARD could be used to disable security hardening in binaries
3477 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3480 * An integer overflow in hcreate and hcreate_r could lead to an
3481 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3483 * The catopen function no longer has unbounded stack usage. Reported by
3484 Max. (CVE-2015-8779)
3486 * The nan, nanf and nanl functions no longer have unbounded stack usage
3487 depending on the length of the string passed as an argument to the
3488 functions. Reported by Joseph Myers. (CVE-2014-9761)
3490 * A stack-based buffer overflow was found in libresolv when invoked from
3491 libnss_dns, allowing specially crafted DNS responses to seize control
3492 of execution flow in the DNS client. The buffer overflow occurs in
3493 the functions send_dg (send datagram) and send_vc (send TCP) for the
3494 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3495 family. The use of AF_UNSPEC triggers the low-level resolver code to
3496 send out two parallel queries for A and AAAA. A mismanagement of the
3497 buffers used for those queries could result in the response of a query
3498 writing beyond the alloca allocated buffer created by
3499 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3500 the overflow. Thanks to the Google Security Team and Red Hat for
3501 reporting the security impact of this issue, and Robert Holiday of
3502 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3504 The following bugs are resolved with this release:
3506 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3507 [887] math: Math library function "logb" and "nextafter" inconsistent
3508 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3509 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3510 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3511 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3513 [4404] localedata: German translation of "Alarm clock" is misleading
3514 [6799] math: nextafter() and nexttoward() doen't set errno on
3515 overflow/underflow errors
3516 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3518 [10432] nis: _nss_nis_setnetgrent assertion failure
3519 [11460] libc: fts has no LFS support
3520 [12926] network: getaddrinfo()/make_request() may spin forever
3521 [13065] nptl: Race condition in pthread barriers
3522 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3523 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3525 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3526 [14912] libc: Rename non-installed bits/*.h headers
3527 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3528 [15367] math: Let gcc use __builtin_isinf
3529 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3530 [15421] math: lgamma wrongly sets signgam for ISO C
3531 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3532 FE_INVALID with argument out of range
3533 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3535 [15786] dynamic-link: ifunc resolver functions can smash function
3537 [15918] math: Unnecessary check for equality in hypotf()
3538 [16061] localedata: Review / update transliteration data
3539 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3541 [16141] time: strptime %z offset restriction
3542 [16171] math: drem should be alias of remainder
3543 [16296] math: fegetround is pure?
3544 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3545 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3547 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3548 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3550 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3551 "Exception "Inexact" set" on ppc32
3552 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3553 [16517] math: Missing underflow exception from tanf/tan/tanl
3554 [16519] math: Missing underflow exception from sinhf
3555 [16520] math: Missing underflow exception from tanhf
3556 [16521] math: Missing underflow exception from exp2
3557 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3559 [16734] stdio: fopen calls mmap to allocate its buffer
3560 [16961] math: nan function incorrect handling of bad sequences
3561 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3562 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3563 [16985] locale: localedef: confusing error message when opening output
3565 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3566 [17197] locale: Redundant shift character in iconv conversion output at
3568 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3569 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3570 [17250] dynamic-link: static linking breaks nss loading
3571 (getaddrinfo/getpwnam/etc...)
3572 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3574 [17441] math: isnan() should use __builtin_isnan() in GCC
3575 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3576 (related to lock elision)
3577 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3578 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3579 [17887] time: strptime should be able to parse "+01:00" style timezones
3580 [17905] libc: catopen() Multiple unbounded stack allocations
3582 [18084] libc: backtrace (..., 0) dumps core on x86
3583 [18086] libc: nice() sets errno to 0 on success
3584 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3585 is too large (CVE-2015-8778)
3586 [18251] dynamic-link: SONAME missing when audit modules provides path
3587 [18265] libc: add attributes for wchar string and memory functions
3588 [18370] math: csqrt missing underflows
3589 [18421] libc: [hppa] read-only segment has dynamic relocations
3590 [18472] libc: Obsolete syscall wrappers should be compat symbols
3591 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3592 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3593 [18525] localedata: Remove locale timezone information
3594 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3595 [18568] localedata: Update locale data to Unicode 8.0
3596 [18589] locale: sort-test.sh fails at random
3597 [18595] math: ctan, ctanh missing underflows
3598 [18604] libc: assert macro-expands its argument
3599 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3600 contains a vector instruction exception.
3601 [18611] math: j1, jn missing errno setting on underflow
3602 [18618] localedata: sync Chechen locale definitions with other *_RU
3604 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3605 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3606 [18665] network: In send_dg, the recvfrom function is NOT always using the
3607 buffer size of a newly created buffer (CVE-2015-7547)
3608 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3610 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3612 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3613 [18699] math: tilegx cproj() for various complex infinities does not yield
3615 [18724] libc: Harden put*ent functions against data injection
3616 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3617 [18755] build: build errors with -DNDEBUG
3618 [18757] stdio: fmemopen fails to set errno on failure
3619 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3621 [18781] libc: openat64 lacks O_LARGEFILE
3622 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3623 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3624 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3625 [18790] math: [ldbl-128ibm] tanhl inaccurate
3626 [18795] libc: stpncpy fortification misses buffer lengths that are
3627 statically too large
3628 [18796] build: build fails for --disable-mathvec
3629 [18803] math: hypot missing underflows
3630 [18820] stdio: fmemopen may leak memory on failure
3631 [18823] math: csqrt spurious underflows
3632 [18824] math: fma spurious underflows
3633 [18825] math: pow missing underflows
3634 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3635 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3636 [18870] build: sem_open.c fails to compile with missing symbol
3638 [18872] stdio: Fix memory leak in printf_positional
3639 [18873] libc: posix_fallocate overflow check ineffective
3640 [18875] math: Excess precision leads incorrect libm
3641 [18877] libc: arm: mmap offset regression
3642 [18887] libc: memory corruption when using getmntent on blank lines
3643 [18918] localedata: hu_HU: change time to HH:MM:SS format
3644 [18921] libc: Regression: extraneous stat() and fstat() performed by
3646 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3647 binaries (CVE-2015-8777)
3648 [18951] math: tgamma missing underflows
3649 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3651 [18953] localedata: lt_LT: change currency symbol to the euro
3652 [18956] math: powf inaccuracy
3653 [18961] math: [i386] exp missing underflows
3654 [18966] math: [i386] exp10 missing underflows
3655 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3656 [18969] build: multiple string test failures due to missing locale
3658 [18970] libc: Reference of pthread_setcancelstate in libc.a
3659 [18977] math: float / long double Bessel functions not in XSI POSIX
3660 [18980] math: i386 libm functions return with excess range and precision
3661 [18981] math: i386 scalb*, ldexp return with excess range and precision
3662 [18982] stdio: va_list and vprintf
3663 [18985] time: Passing out of range data to strftime() causes a segfault
3665 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3666 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3667 [19012] locale: iconv_open leaks memory on error path
3668 [19016] math: clog, clog10 inaccuracy
3669 [19018] nptl: Mangle function pointers in tls_dtor_list
3670 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3671 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3672 [19048] malloc: malloc: arena free list can become cyclic, increasing
3674 [19049] math: [powerpc] erfc incorrect zero sign
3675 [19050] math: [powerpc] log* incorrect zero sign
3676 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3677 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3678 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3679 [19074] network: Data race in _res_hconf_reorder_addrs
3680 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3681 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3682 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3684 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3686 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3687 [19086] manual: posix_fallocate64 documented argument order is wrong.
3688 [19088] math: lround, llround missing exceptions close to overflow
3690 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3691 [19095] math: dbl-64 lrint incorrect for 64-bit long
3692 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3693 [19124] dynamic-link: ld.so failed to build with older assmebler
3694 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3695 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3696 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3697 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3698 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3699 pthread_setaffinity_np
3700 [19156] math: [ldbl-128] j0l spurious underflows
3701 [19164] nptl: tst-getcpu fails with many possible CPUs
3702 [19168] math: math/test-ildoubl and math/test-ldouble failure
3703 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3704 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3706 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3707 (FE_NOMASK_ENV) do not clear SSE exceptions
3708 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3709 _int_new_arena/reused_arena
3710 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3711 [19201] math: dbl-64 remainder incorrect sign of zero result
3712 [19205] math: bits/math-finite.h conditions do not match math.h and
3714 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3715 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3716 for C99-based standards
3717 [19212] libc: features.h not -Wundef clean
3718 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3720 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3721 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3722 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3724 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3725 "inexact" exceptions
3726 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3728 [19242] libc: strtol incorrect in Turkish locales
3729 [19243] malloc: reused_arena can pick an arena on the free list, leading
3730 to an assertion failure and reference count corruption
3731 [19253] time: tzset() ineffective when temporary TZ did not include DST
3733 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3734 [19270] math: [hppa] Shared libm missing __isnanl
3735 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3736 MAP_HUGETLB and MAP_STACK defines
3737 [19313] nptl: Wrong __cpu_mask for x32
3738 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3739 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3740 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3741 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3742 [19363] time: x32: times() return value wrongly truncates/sign extends
3744 [19367] dynamic-link: Improve branch prediction on Silvermont
3745 [19369] network: Default domain name not reset by res_ninit when "search"
3746 / "domain" entry is removed from resolv.conf
3747 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3749 [19385] localedata: bg_BG: time separator should be colon, not comma
3750 [19408] libc: linux personality syscall wrapper may erroneously return an
3751 error on 32-bit architectures
3752 [19415] libc: dladdr returns wrong names on hppa
3753 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3754 IBM905, IBM907, and IBM909
3755 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3756 [19443] build: build failures with -DDEBUG
3757 [19451] build: Make check fails on test-double-vlen2
3758 [19462] libc: Glibc failed to build with -Os
3759 [19465] math: Wrong code with -Os
3760 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3762 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3764 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3765 [19486] math: S390: Math tests fail with "Exception Inexact set".
3766 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3767 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3769 [19590] math: Fail to build shared objects that use libmvec.so functions.
3773 * The following bugs are resolved with this release:
3775 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3776 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3777 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3778 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3779 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3780 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3781 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3782 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3783 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3784 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3785 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3786 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3787 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3788 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3789 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3790 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3791 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3792 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3793 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3794 18657, 18676, 18694, 18696, 18887.
3796 * Cache information can be queried via sysconf() function on s390 e.g. with
3797 _SC_LEVEL1_ICACHE_SIZE as argument.
3799 * A buffer overflow in gethostbyname_r and related functions performing DNS
3800 requests has been fixed. If the NSS functions were called with a
3801 misaligned buffer, the buffer length change due to pointer alignment was
3802 not taken into account. This could result in application crashes or,
3803 potentially arbitrary code execution, using crafted, but syntactically
3804 valid DNS responses. (CVE-2015-1781)
3806 * The time zone file parser has been made more robust against crafted time
3807 zone files, avoiding heap buffer overflows related to the processing of
3808 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3809 large time zone data files. Overly long time zone specifiers in the TZ
3810 variable no longer result in stack overflows and crashes.
3812 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3813 for LD and GD on x86 and x86-64, has been implemented. You will need
3814 binutils-2.24 or later to enable this optimization.
3816 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3817 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3818 Hat). These updates cause user visible changes, such as the fix for bug
3821 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3822 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3823 condition in some applications.
3825 * Added vector math library named libmvec with the following vectorized x86_64
3826 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3828 The library can be disabled with --disable-mathvec. Use of the functions is
3829 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3830 Shared library libmvec.so is linked in as needed when using -lm (no need to
3831 specify -lmvec explicitly for not static builds).
3832 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3834 * A new fmemopen implementation has been added with the goal of POSIX
3835 compliance. The new implementation fixes the following long-standing
3836 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3837 old implementation is still present for use be by existing binaries.
3839 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3840 releases. It has been fixed to match 2.19 and older, but binaries built
3841 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3843 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3844 Contributed by Roland McGrath (Google).
3846 * The header <regexp.h> is deprecated, and will be removed in a future
3847 release. Use of this header will trigger a deprecation warning.
3848 Application developers should update their code to use <regex.h> instead.
3850 This header was formerly part of SUS, but was deprecated in 1994 and
3851 removed from the standard in 2001. Also, the glibc implementation
3852 leaks memory. See BZ#18681 for more details.
3856 * The following bugs are resolved with this release:
3858 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3859 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3860 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3861 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3862 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3863 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3864 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3865 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3866 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3867 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3870 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3871 too little memory for the to-be-scanned arguments and overflow the
3872 allocated buffer. The implementation now correctly computes the required
3873 buffer size when using malloc, and switches to malloc from alloca as
3876 * A new semaphore algorithm has been implemented in generic C code for all
3877 machines. Previous custom assembly implementations of semaphore were
3878 difficult to reason about or ensure that they were safe. The new version
3879 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3880 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3881 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3883 * Port to Altera Nios II has been contributed by Mentor Graphics.
3885 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3886 implementations for powerpc64/powerpc64le.
3887 Implemented by Adhemerval Zanella (IBM).
3889 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3890 and powerpc64le. This may improve lock scaling of existing programs on
3891 HTM capable systems. The lock elision code is only enabled with
3892 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3893 powerpc will issue a transaction abort on every syscall to avoid side
3894 effects being visible outside transactions.
3896 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3897 AArch64. Contributed by ARM Ltd.
3899 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3901 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3902 under certain input conditions resulting in the execution of a shell for
3903 command substitution when the application did not request it. The
3904 implementation now checks WRDE_NOCMD immediately before executing the
3905 shell and returns the error WRDE_CMDSUB as expected.
3907 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3908 processing format strings with a large number of format specifiers.
3910 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3911 infinite loop if the DNS response contained a PTR record of an unexpected
3914 * The minimum GCC version that can be used to build this version of the GNU
3915 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3916 still be used to compile programs using the GNU C Library.
3918 * The GNU C Library is now built with -Werror by default. This can be
3919 disabled by configuring with --disable-werror.
3921 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3923 * The obsolete sigvec function has been removed. This was the original
3924 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3925 programs have been using instead for about 25 years. Of course, ABI
3926 compatibility for old binaries using sigvec remains intact.
3928 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3929 with newer versions of bison.
3931 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3932 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3933 registers overlay two consecutive single-precision registers. MIPS32R2
3934 introduced a new FPU mode (FR=1) where double-precision registers extend the
3935 corresponding single-precision registers which is incompatible with the
3936 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3937 require the use of FR=1 making a transition necessary. New o32 ABI
3938 extensions enable users to migrate over time from the original o32 ABI
3939 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3940 tracks the ABI of any loaded object and verifies that new objects are
3941 compatible. Mode transitions will also be requested as required and
3942 unsupportable objects will be rejected. The ABI checks include both soft and
3943 hard float ABIs for o32, n32 and n64.
3945 GCC 5 with GNU binutils 2.25 onwards:
3946 It is strongly recommended that all o32 system libraries are built using the
3947 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3948 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3949 compiler using --with-fp-32=xx to set this by default.
3953 * The following bugs are resolved with this release:
3955 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3956 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3957 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3958 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3959 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3960 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3961 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3962 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3963 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3964 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3965 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3966 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3967 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3968 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3969 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3971 * Reverted change of ABI data structures for s390 and s390x:
3972 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3973 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3974 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3975 are preserved pointing straight to the same implementation as the old ones.
3976 Given that, new callers will simply provide a too-big buffer to these
3977 functions. Any applications/libraries out there that embed jmp_buf or
3978 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3979 against 2.19 headers will have to rebuilt again. This is necessary in any
3980 case to revert the breakage in their ABI caused by the glibc change.
3982 * Support for file description locks is added to systems running the
3983 Linux kernel. The standard file locking interfaces are extended to
3984 operate on file descriptions, not file descriptors, via the use of
3985 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3986 are associated with an open file instead of a process.
3988 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3990 * The minimum Linux kernel version that this version of the GNU C Library
3991 can be used with is 2.6.32.
3993 * Running the testsuite no longer terminates as soon as a test fails.
3994 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3995 with PASS or FAIL lines for individual tests. A summary of the results is
3996 printed, including a list of failing lists, and "make check" exits with
3997 error status if there were any unexpected failures. "make check
3998 stop-on-test-failure=y" may be used to keep the old behavior.
4000 * The am33 port, which had not worked for several years, has been removed
4003 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
4004 supported; they now act the same as _DEFAULT_SOURCE (but generate a
4005 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
4006 conflicted with POSIX (support for which was removed in 2.19), the
4007 interfaces those macros enabled remain available when compiling with
4008 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
4009 test macros defined.
4011 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
4013 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
4014 This may improve lock scaling of existing programs on TX capable systems.
4015 The lock elision code is only built with --enable-lock-elision=yes and
4016 then requires a GCC version supporting the TX builtins. With lock elision
4017 default mutexes are elided via __builtin_tbegin, if the cpu supports
4018 transactions. By default lock elision is not enabled and the elision code
4021 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
4022 copy the path argument. This allowed programs to cause posix_spawn to
4023 deference a dangling pointer, or use an unexpected pathname argument if
4024 the string was modified after the posix_spawn_file_actions_addopen
4027 * All supported architectures now use the main glibc sysdeps directory
4028 instead of some being in a separate "ports" directory (which was
4029 distributed separately before glibc 2.17).
4031 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
4032 On configurations that support it (all Linux configurations), it's now
4033 used regardless of the --enable-add-ons switch to configure. It is no
4034 longer possible to build such configurations without pthreads support.
4036 * Locale names, including those obtained from environment variables (LANG
4037 and the LC_* variables), are more tightly checked for proper syntax.
4038 setlocale will now fail (with EINVAL) for locale names that are overly
4039 long, contain slashes without starting with a slash, or contain ".." path
4040 components. (CVE-2014-0475) Previously, some valid locale names were
4041 silently replaced with the "C" locale when running in AT_SECURE mode
4042 (e.g., in a SUID program). This is no longer necessary because of the
4045 * On x86-64, the dynamic linker's lazy-binding support is now compatible
4046 with application code using Intel MPX instructions. (With all previous
4047 versions, the MPX register state could be clobbered when making calls
4048 into or out of a shared library.) Note that while the new dynamic
4049 linker is compatible with all known x86 hardware whether or not it
4050 supports Intel MPX, some x86 instruction-set emulators might fail to
4051 handle the new instruction encodings. This is known to affect Valgrind
4052 versions up through 3.9 (but will be fixed in the forthcoming 3.10
4053 release), and might affect other tools that do instruction emulation.
4055 * Support for loadable gconv transliteration modules has been removed.
4056 The support for transliteration modules has been non-functional for
4057 over a decade, and the removal is prompted by security defects. The
4058 normal gconv conversion modules are still supported. Transliteration
4059 with //TRANSLIT is still possible, and the //IGNORE specifier
4060 continues to be supported. (CVE-2014-5119)
4062 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
4063 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
4064 resulting a denial-of-service security vulnerability in applications which
4065 use functions related to iconv. (CVE-2014-6040)
4069 * The following bugs are resolved with this release:
4071 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
4072 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
4073 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
4074 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
4075 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
4076 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
4077 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
4078 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
4079 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
4080 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
4081 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
4082 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
4083 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
4084 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
4085 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
4086 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
4087 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
4088 16431, 16453, 16474, 16506, 16510, 16529
4090 * Slovenian translations for glibc messages have been contributed by the
4091 Translation Project's Slovenian team of translators.
4093 * The public headers no longer use __unused nor __block. This change is to
4094 support compiling programs that are derived from BSD sources and use
4095 __unused internally, and to support compiling with Clang's -fblock
4096 extension which uses __block.
4098 * CVE-2012-4412 The strcoll implementation caches indices and rules for
4099 large collation sequences to optimize multiple passes. This cache
4100 computation may overflow for large collation sequences and may cause a
4101 stack or buffer overflow. This is now fixed to use a slower algorithm
4102 which does not use a cache if there is an integer overflow.
4104 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
4105 rules for large collation sequences to optimize multiple passes and falls
4106 back to alloca if malloc fails, resulting in a possible stack overflow.
4107 The implementation now falls back to an uncached collation sequence lookup
4110 * CVE-2013-4788 The pointer guard used for pointer mangling was not
4111 initialized for static applications resulting in the security feature
4112 being disabled. The pointer guard is now correctly initialized to a
4113 random value for static applications. Existing static applications need
4114 to be recompiled to take advantage of the fix (bug 15754).
4116 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
4117 to the d_name member of struct dirent, or omit the terminating NUL
4118 character. (Bugzilla #14699).
4120 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
4121 aligned_alloc functions could allocate too few bytes or corrupt the
4122 heap when passed very large allocation size values (Bugzilla #15855,
4125 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
4126 for AF_INET6 has been fixed (Bugzilla #16072).
4128 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
4129 pap_CW, quz_PE, the_NP.
4131 * Substantially revised locales: gd_GB, ht_HT
4133 * The LC_ADDRESS field was updated to support country_car for almost all
4136 * ISO 1427 definitions were updated.
4138 * ISO 3166 definitions were updated.
4140 * The localedef utility now supports --big-endian and --little-endian
4141 command-line options to generate locales for a different system from that
4142 for which the C library was built.
4144 * Binary locale files now only depend on the endianness of the system for
4145 which they are generated and not on other properties of that system. As a
4146 consequence, binary files generated with new localedef may be incompatible
4147 with old versions of the GNU C Library, and binary files generated with
4148 old localedef may be incompatible with this version of the GNU C Library,
4149 in the following circumstances:
4151 + Locale files may be incompatible on m68k systems.
4153 + Locale archive files (but not separate files for individual locales) may
4154 be incompatible on systems where plain "char" is signed.
4156 * The configure option --disable-versioning has been removed. Builds with
4157 --disable-versioning had not worked for several years.
4159 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
4160 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
4162 * SystemTap probes for malloc have been introduced.
4164 * SystemTap probes for slow multiple precision fallback paths of
4165 transcendental functions have been introduced.
4167 * Support for powerpc64le has been added.
4169 * The soft-float powerpc port now supports e500 processors.
4171 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
4173 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
4174 set of header declarations that are enabled by default, even when other
4175 feature test macros or compiler options such as -std=c99 would otherwise
4176 disable some of those declarations.
4178 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
4179 conflict with POSIX. The libbsd-compat library (which was a dummy library
4180 that did nothing) has also been removed.
4182 * Preliminary documentation about Multi-Thread, Async-Signal and
4183 Async-Cancel Safety has been added.
4185 * Change of ABI data structures for s390 and s390x:
4186 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
4187 allow for future hardware extensions. All library functions that accept or
4188 return these structures were versioned in order to provide backwards
4189 compatibility with existing code. However, not all cases can be handled
4190 with interface versioning. If an application embeds either structure into
4191 another structure and that structure is passed to another compilation unit
4192 which expects the newer larger-sized object then any access to the new
4193 fields will result in undefined behaviour. Similarly any access to fields
4194 that were moved by the enlarging of the structures will cause undefined
4195 behaviour. To fix the undefined behaviour all objects that are part of the
4196 final in-memory image must agree on the size of structures, and this may
4197 require recompilation.
4201 * The following bugs are resolved with this release:
4203 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
4204 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
4205 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
4206 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
4207 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
4208 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
4209 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
4210 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
4211 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
4212 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
4213 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
4214 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
4215 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
4218 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
4219 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
4220 Distributions can re-enable building and using pt_chown via the new configure
4221 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
4222 considerable security risks and should only be used if the distribution
4223 understands and accepts the risks.
4225 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
4228 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
4229 fixed (Bugzilla #15330).
4231 * Add support for calling C++11 thread_local object destructors on thread
4232 and program exit. This needs compiler support for offloading C++11
4233 destructor calls to glibc.
4235 * Improved worst case performance of libm functions with double inputs and
4238 * Support for priority inherited mutexes in pthread condition variables on
4239 non-x86 architectures.
4241 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
4243 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
4245 * Optimized string functions for ARM. Implemented by Will Newton and
4248 * Optimized libm functions for SPARC. Implemented by David S. Miller.
4250 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
4253 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
4254 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
4256 * Added a benchmark framework to track performance of functions in glibc.
4258 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
4259 It is based on draft TS 18661 and currently enabled as a GNU extension.
4261 * On Linux, the clock function now uses the clock_gettime system call
4262 for improved precision, rather than old times system call.
4264 * Added support for version-3 tz format files. This is needed when using
4265 the tz database release 2013e or later, and affects a few unusual cases --
4266 currently only TZ='America/Godthab' for time stamps after 2037.
4268 * Added new API functions pthread_getattr_default_np and
4269 pthread_setattr_default_np to get and set the default pthread
4270 attributes of a process.
4272 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
4273 This may improve lock scaling of existing programs on TSX capable systems.
4274 When the --enable-lock-elision=yes parameter is specified at configure
4275 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
4278 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
4279 availability). Implemented by Ryan S. Arnold.
4281 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
4285 * The following bugs are resolved with this release:
4287 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
4288 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
4289 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
4290 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
4291 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
4292 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
4293 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
4294 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
4295 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
4296 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
4297 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
4298 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
4299 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
4300 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
4301 14879, 14889, 14893, 14898, 14914.
4303 * Optimization of memcpy for MIPS.
4305 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
4306 EMFILE has been fixed (Bugzilla #14889).
4308 * The add-on ports collection is now distributed in the "ports" subdirectory
4309 of the main GNU C Library distribution, rather than separately.
4311 * Port to ARM AArch64 contributed by Linaro.
4313 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
4314 Optimized versions of memcpy, memset, and memcmp added for System z10 and
4316 Implemented by Andreas Krebbel.
4318 * The new function secure_getenv allows secure access to the environment,
4319 returning NULL if running in a SUID/SGID process. This function replaces
4320 the internal function __secure_getenv.
4322 * SystemTap static probes have been added into the dynamic linker.
4323 Implemented by Gary Benson.
4325 * Optimizations of string functions strstr, strcasestr and memmem.
4326 Implemented by Maxim Kuvyrkov.
4328 * The minimum Linux kernel version that this version of the GNU C Library
4329 can be used with is 2.6.16.
4331 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4332 powerpc POWER7. Implemented by Will Schmidt.
4334 * New configure option --disable-nscd builds the C library such that it
4335 never attempts to contact the Name Service Caching Daemon (nscd).
4336 New configure option --disable-build-nscd avoids building nscd itself;
4337 this is the default if --disable-nscd is used.
4339 * Improved support for cross-compilation, including cross-testing and
4340 bootstrap builds without a previously built glibc.
4342 * Several testsuite tests are now able to test multiple IFUNC variants of an
4343 interface, rather than just testing the one that would be chooen by
4346 * New configure options --with-bugurl and --with-pkgversion, for
4347 distributors to use to embed their bug-reporting and package version
4348 information in --help and --version output.
4350 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4351 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4352 allows creation of chroots without the procfs mounted on /proc.
4354 * The `crypt' function now fails if passed salt bytes that violate the
4355 specification for those values. On Linux, the `crypt' function will
4356 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4357 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4358 when the mode is enabled.
4360 * The `clock_*' suite of functions (declared in <time.h>) is now available
4361 directly in the main C library. Previously it was necessary to link with
4362 -lrt to use these functions. This change has the effect that a
4363 single-threaded program that uses a function such as `clock_gettime' (and
4364 is not linked with -lrt) will no longer implicitly load the pthreads
4365 library at runtime and so will not suffer the overheads associated with
4366 multi-thread support in other code such as the C++ runtime library.
4368 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4373 * The following bugs are resolved with this release:
4375 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4376 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4377 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4378 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4379 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4380 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4381 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4382 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4383 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4384 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4385 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4386 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4387 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4388 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4389 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4390 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4391 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4392 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4393 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4394 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4395 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4396 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4399 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4400 configuring glibc with:
4401 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4402 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4403 Implemented by H.J. Lu.
4407 + define static_assert
4409 + do not declare gets
4411 + declare at_quick_exit and quick_exit also for ISO C11
4413 + aligned_alloc. NB: The code is deliberately allows the size parameter
4414 to not be a multiple of the alignment. This is a moronic requirement
4415 in the standard but it is only a requirement on the caller, not the
4418 + timespec_get added
4420 + uchar.h support added
4422 + CMPLX, CMPLXF, CMPLXL added
4424 Implemented by Ulrich Drepper.
4426 * Support for the IA-64 has been moved to ports.
4428 * Remove support for anything but ELF binary format
4430 * Checking versions of poll, ppoll added.
4431 Implemented by Ulrich Drepper.
4433 * More generic and 64-bit performance optimizations to math functions.
4434 Implemented by Ulrich Drepper.
4436 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4437 headers and functions available at compile time as they were before
4438 version 2.14. This option will be removed at some time in the future
4439 after the TI-RPC library becomes fully sufficient for the needs of
4440 existing applications.
4442 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4443 Note that glibc is not expected to work with any Linux kernel version
4446 * New header <sys/auxv.h> and function getauxval allowing easy access to
4447 the AT_* key-value pairs passed from the Linux kernel. The header also
4448 defines the HWCAP_* bits associated with the AT_HWCAP key.
4450 * New locales: mag_IN
4452 * New configure option --enable-systemtap builds SystemTap static probes
4453 into libc for setjmp and longjmp and into libpthread for various operations.
4454 So far the setjmp/longjmp probes and some of the libpthread probes are
4455 provided only for i*86 and x86_64.
4456 Implemented by Roland McGrath and Rayson Ho.
4458 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4460 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4463 * More optimized functions for SPARC. Implemented by David S. Miller.
4465 * Improved support for cross-compilation, especially bootstrap builds
4466 without a previously built glibc.
4468 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4469 Chris Metcalf from Tilera.
4471 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4472 now supported for ARM processors.
4474 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4475 as the name of the dynamic linker, to distinguish it from the
4476 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4478 * Support for CRIS has been removed from ports.
4480 * A new class of installed header has been documented for low-level
4481 platform-specific functionality. PowerPC added the first instance with a
4482 function to provide time base register access. Contributed by Tulio
4483 Magno Quites Machado Filho.
4485 * ix86 configurations now install header files that are consistent with
4486 what x86-64 configurations install. These same header files can be used
4487 for -m32, -m64, or -mx32 builds.
4488 Contributed by H.J. Lu.
4490 * Math library bug fixes. A thorough audit of all open math library bugs was
4491 conducted by Joseph Myers. Significant progress was made on many math
4492 library bugs resulting in more accurate exceptions and function results.
4493 Many thanks to all those that contributed including Andreas Jaeger for his
4494 patch review and work on the x87 trigonometric instruction issues.
4496 * Timezone data is no longer installed. Timezone-related binaries and scripts
4497 will continue to be installed. Users should obtain their timezone data from
4498 their distribution provider or from the tzdata package at
4499 <ftp://munnari.oz.au/pub/>.
4503 * The following bugs are resolved with this release:
4505 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4506 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4507 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4508 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4509 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4510 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4511 13484, 13506, 13515, 13523, 13524, 13538, 13540
4513 * New program pldd to list loaded object of a process
4514 Implemented by Ulrich Drepper.
4516 * Add nss_db support back to glibc. No more dependency on Berkeley db
4517 and support for initgroups lookups.
4518 Implemented by Ulrich Drepper.
4520 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4521 Contributed by HJ Lu.
4523 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4524 Contributed by HJ Lu.
4526 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4527 on x86-32 and x86-64.
4528 Contributed by Liubov Dmitrieva.
4530 * Optimized strchr and strrchr for SSE on x86-32.
4531 Contributed by Liubov Dmitrieva.
4533 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4534 for x86-64 and x86-32.
4535 Contributed by Liubov Dmitrieva.
4537 * New interfaces: scandirat, scandirat64
4538 Implemented by Ulrich Drepper.
4540 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4541 Implemented by Ulrich Drepper.
4543 * nscd now also caches the netgroup database.
4544 Implemented by Ulrich Drepper.
4546 * Integrate libm with gcc's -ffinite-math-only option.
4547 Implemented by Ulrich Drepper.
4549 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4550 to math functions. Implemented by Ulrich Drepper.
4552 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4553 Implemented by Ulrich Drepper.
4555 * New Linux interfaces: process_vm_readv, process_vm_writev
4557 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4558 Implemented by Ulrich Drepper.
4560 * Optimized nearbyint and strcasecmp for PPC.
4561 Implemented by Adhemerval Zanella.
4563 * New locales: bho_IN, unm_US, es_CU, ta_LK
4567 * The following bugs are resolved with this release:
4569 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4570 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4571 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4572 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4573 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4574 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4575 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4576 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4577 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4578 12795, 12811, 12813, 12814, 12841
4580 * The RPC implementation in libc is obsoleted. Old programs keep working
4581 but new programs cannot be linked with the routines in libc anymore.
4582 Programs in need of RPC functionality must be linked against TI-RPC.
4583 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4585 Visible changes of this change include (obviously) the inability to link
4586 programs using RPC functions without referencing the TI-RPC library and the
4587 removal of the RPC headers from the glibc headers.
4588 Implemented by Ulrich Drepper.
4590 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4591 syncfs, setns, sendmmsg
4593 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4594 yue_HK, lij_IT, mhr_RU
4596 * New encodings: CP770, CP771, CP772, CP773, CP774
4598 * New program sotruss to trace calls through PLTs
4599 Implemented by Ulrich Drepper.
4601 * The malloc hook implementation is marked deprecated and will be removed
4602 from the default implementation in the next version. The design never
4603 worked ever since the introduction of threads. Even programs which do
4604 not create threads themselves can use multiple threads created internally.
4608 * The following bugs are resolved with this release:
4610 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4611 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4612 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4613 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4616 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4618 * POWER7 optimizations: memset, memcmp, strncmp
4620 * New optimized string functions for x86-64: strnlen (SSE2),
4621 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4622 Implemented by Ulrich Drepper.
4626 * The following bugs are resolved with this release:
4628 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4629 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4630 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4631 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4632 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4633 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4634 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4635 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4637 * New interfaces: pthread_getname_np, pthread_setname_np
4639 * New Linux interface: recvmmsg
4641 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4643 * The dynamic linker now recognizes supported ABI versions from the
4644 EI_ABIVERSION field in the ELF header.
4645 Implemented by Ulrich Drepper.
4647 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4648 will not be used to fill in password fields in the passwd.byname replies.
4649 Instead it is used to synthesize the shadow.byname table, should it be
4650 missing. This is a useful mode in some installations involving Solaris.
4651 Implemented by Ulrich Drepper.
4653 * New locales: kok_IN, sq_MK, cv_RU
4657 * The following bugs are resolved with this release:
4659 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4660 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4661 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4662 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4663 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4664 10789, 10817, 10823, 10840, 10847
4666 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4668 Implemented by Ulrich Drepper.
4670 * Checking version of longjmp added that fails if an uninitialized stack
4671 frame would be created. Implemented by Ulrich Drepper.
4673 * STT_GNU_IFUNC is now supported in static executables.
4674 Implemented by H.J. Lu.
4676 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4678 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4679 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4680 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4681 Contributed by H.J. Lu.
4683 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4684 Implemented by Ulrich Drepper.
4686 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4688 Contributed by H.J. Lu.
4690 * Support for fma instruction in AVX on x86-64.
4691 Implemented by H.J. Lu and Ulrich Drepper.
4693 * AVX support in x86-64 auditing support in ld.so.
4694 Implemented by H.J. Lu.
4696 * STB_GNU_UNIQUE support added.
4697 Implemented by Ulrich Drepper.
4699 * Implement second fallback mode for optimized DNS lookup for even more
4700 broken environments. If two requests from the same port are not
4701 handled correctly close the socket and open a new one before sending
4702 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4703 can be used to select this mode right away, instead of rediscovering the
4704 necessity is every process again.
4705 Implemented by Ulrich Drepper.
4707 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4708 Implemented by Adam Tkac.
4710 * Optimized iconv conversions for S390x.
4711 Implemented by Andreas Krebbel.
4713 * Using condvars with PI mutexes is now more efficient due to kernel
4714 support for requeueing to PI futexes. NPTL support added for x86-64.
4715 Implemented by Ulrich Drepper.
4717 * New locales: ps_AF, my_MM
4721 * The following bugs are resolved with this release:
4723 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4724 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4725 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4726 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4727 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4729 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4730 Implemented by Ulrich Drepper.
4732 * New Linux interfaces: accept4, fallocate, fallocate64.
4733 Implemented by Ulrich Drepper.
4735 * Correct declarations of string function when used in C++ code. This
4736 could lead to compile errors for invalid C++ code.
4738 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4741 * New POSIX 2008 interface: psiginfo
4742 Implemented by Ulrich Drepper.
4744 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4745 Implemented by Ulrich Drepper.
4747 * Support for selecting between multiple function definitions at runtime
4748 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4750 * The libcrypt library can now use the hash function implementations in
4751 NSS. Implemented by Ulrich Drepper.
4753 * The malloc implementation can be compiled to be less memory efficient
4754 but higher performing in multi-threaded programs.
4755 Implemented by Ulrich Drepper.
4757 * New locales: nan_TW@latin, ks_IN
4759 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4760 Implemented by Ulrich Drepper.
4762 * Extended printf hook support. It is possible to use user-defined types
4763 and extend existing format specifiers.
4764 Implemented by Ulrich Drepper.
4766 * Handling for group shadow files has been added.
4767 Implemented by Ulrich Drepper.
4769 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4770 servers (the case, e.g., for some people using the built-in DNS
4771 server in ADSL modems/routers). There is a once-per-process timeout
4772 in case of a broken server. To avoid it, users can run nscd or put
4773 'options single-request' in /etc/resolv.conf.
4774 Implemented by Ulrich Drepper.
4778 * The following bugs are resolved with this release:
4780 2447, 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447,
4781 6461, 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712,
4782 6713, 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839,
4783 6843, 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955,
4784 6966, 6968, 6974, 6980, 6995, 7008, 7009, 7029
4786 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4787 up at the same time. Implemented by Ulrich Drepper.
4789 * TLS descriptors for LD and GD on x86 and x86-64.
4790 Implemented by Alexandre Oliva.
4792 * getaddrinfo now handles DCCP and UDPlite.
4793 Implemented by Ulrich Drepper.
4795 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4796 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4797 Implemented by Ulrich Drepper.
4799 * New implementation of memmem, strstr, and strcasestr which is O(n).
4800 Implemented by Eric Blake.
4802 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4804 * Implement "e" option for popen to open file descriptor with the
4805 close-on-exec flag set. Implemented by Ulrich Drepper.
4807 * Implement "b" mode for fmemopen. In this mode writes writes don't
4808 implicitly add a NUL byte and seeks from the end of the buffer really
4809 use the buffer end, not the string length as the basis.
4810 Implemented by Ulrich Drepper.
4812 * Many functions, exported and internal, now atomically set the close-on-exec
4813 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4815 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4817 Implemented by Pravin Satpute.
4819 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4823 * The following bugs are resolved with this release:
4825 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4826 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4827 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4828 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4829 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4830 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4831 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4833 * New locales: bo_CN, bo_IN, shs_CA.
4835 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4837 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4838 Implemented by Pravin Satpute.
4840 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4842 * nscd caches now all timeouts for DNS entries
4843 Implemented by Ulrich Drepper.
4845 * nscd is more efficient and wakes up less often.
4846 Implemented by Ulrich Drepper.
4848 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4849 vdprintf, and obstack_vprintf.
4850 Implemented by Jakub Jelinek.
4852 * Faster memset for x86-64.
4853 Implemented by Harsha Jagasia and H.J. Lu.
4855 * Faster memcpy on x86.
4856 Implemented by Ulrich Drepper.
4858 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4859 Implemented by Ulrich Drepper.
4861 * Faster sqrt and sqrtf implemention for some PPC variants.
4862 Implemented by Steven Munroe.
4866 * The following bugs are resolved with this release:
4868 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4869 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4870 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4871 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4872 5071, 5103, 5104, 5112, 5113, 5184, 5186
4874 * More checking functions: fread, fread_unlocked, open*, mq_open.
4875 Implemented by Jakub Jelinek and Ulrich Drepper.
4877 * Extend fortification to C++. Implemented by Jakub Jelinek.
4879 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4880 by not recognizing 'a' as a modifier when those specs are requested.
4881 Implemented by Jakub Jelinek.
4883 * PPC optimizations to math and string functions.
4884 Implemented by Steven Munroe.
4886 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4887 options to be passed. Implemented by Ulrich Drepper.
4889 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4891 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4892 Implemented by Ulrich Drepper.
4894 * Handle private futexes in the NPTL implementation.
4895 Implemented by Jakub Jelinek and Ulrich Drepper.
4897 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4898 Implemented by Roland McGrath and Ulrich Drepper.
4900 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4902 * SHA-256 and SHA-512 based password encryption.
4903 Implemented by Ulrich Drepper.
4905 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4906 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4909 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4910 Implemented by Ulrich Drepper.
4914 * The following bugs are resolved with this release:
4916 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4917 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4918 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4919 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4920 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4921 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4922 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4925 * New Linux interfaces: epoll_pwait, sched_getcpu.
4927 * New generic interfaces: strerror_l.
4929 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4933 * The following bugs are resolved with this release:
4935 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4936 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4937 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4938 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4939 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4940 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4941 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4942 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4943 3225, 3251, 3252, 3253, 3273
4945 * For Linux, the sorting of addresses returned by getaddrinfo now also
4946 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4947 Implemented by Ulrich Drepper.
4949 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4950 Implemented by Ulrich Drepper.
4952 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4954 * New iconv module for MIK. Contributed by Alexander Shopov.
4956 * For sites with broken group and/or passwd database, the auto-propagate
4957 option of nscd can prevent creating ID lookup entries from the results
4958 of a name lookup and vice versa. This usually is no problem but some
4959 site might have problems with the default behavior.
4960 Implemented by Ulrich Drepper.
4962 * Iterating over entire database in NIS can be slow. With the
4963 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4964 to trade time for memory. The entire database will be read at once.
4965 Implemented by Ulrich Drepper.
4967 * The interfaces introduced in RFC 3542 have been implemented by
4970 * Support for the new ELF hash table format was added by Ulrich Drepper.
4972 * Support for priority inheritance mutexes added by Jakub Jelinek and
4975 * Support for priority protected mutexes added by Jakub Jelinek.
4977 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4978 or_IN, csb_PL, fy_NL, sr_ME.
4982 * More overflow detection functions.
4984 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4985 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4987 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4988 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4989 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4990 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4991 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4992 by Masahide Washizawa.
4994 * It is now possible to install audit libraries for the dynamic linker using
4995 LD_AUDIT. Implemented by Ulrich Drepper.
4997 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4998 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4999 For a libc and libpthread that works well on Linux 2.4 kernels, we
5000 recommend using the stable 2.3 branch.
5002 * The new function open_wmemstream acts like open_memstream,
5003 but uses a wchar_t wide character buffer.
5005 * The new function ppoll is an improved version of poll, similar to pselect.
5007 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
5008 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
5009 renameat, unlinkat, linkat, symlinkat, readlinkat.
5011 * New Linux kernel system calls: unshare,
5012 inotify_init, inotify_add_watch, inotify_rm_watch.
5014 * The euidaccess function is now also known by the alias eaccess,
5015 for compatibility with some other systems.
5017 * Timezone data updated to 2006b version.
5021 * The following bugs are resolved with this release:
5023 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
5024 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
5025 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
5026 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
5027 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
5028 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
5030 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5032 * As of this release, GCC 4 can be used to compile the C Library.
5034 * Timezone data updated to 2005m version.
5038 * The following bugs are resolved with this release:
5040 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
5041 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
5042 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
5043 777, 787, 821, 822, 823, 825
5045 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
5049 * Support for RFC 3678. Real implementations exist only for Linux so far.
5050 Implemented by Ulrich Drepper.
5052 * nscd can now cache entries persistently. Expiring entries are reloaded.
5053 For speedups the cache can be shared in memory with client processes.
5054 Implemented by Ulrich Drepper.
5056 * nscd can now perform SELinux checks.
5057 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
5059 * getaddrinfo queries are now cached. Canonical name lookup is performed
5061 Implemented by Ulrich Drepper.
5063 * The nothrow function attribute is used when headers are used by gcc when
5064 compiling C code. This can avoid significant amounts of exception
5067 * The malloc functions perform more error checking and are stricter when
5068 it comes to reacting on errors. The default action is to terminate
5069 the process after showing an error message. Implemented by Ulrich Drepper.
5071 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
5072 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
5074 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
5075 namespaces using the new function dlmopen(). This feature is of course,
5076 like most other dynamic loading functionality, not available in statically
5077 linked applications. Implemented by Ulrich Drepper.
5079 * Low-overhead boundary checking variants of string and some stdio functions
5080 were added. These are to be used in conjunction with a gcc patch by
5081 Jakub Jelinek which adds calls to these functions if possible.
5082 Implemented by Jakub Jelinek and Ulrich Drepper.
5084 * Old code for several operating systems and machine architectures that
5085 have not been in working condition in a long time have been removed from
5086 the main source tree maintained by the GNU C Library's maintainers.
5087 These files are now reside in the separate `ports' source module
5088 that is usable as an add-on when building the library.
5092 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
5093 interrogate the dynamic linker, compatible with the Solaris interface.
5095 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
5096 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
5098 * getifaddrs now uses the netlink interface on Linux to get its information.
5099 Implemented by Thorsten Kukuk.
5101 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
5102 Implemented by Ulrich Drepper.
5104 * support for non-executable stacks on x86 has been added. Changes mostly
5107 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
5110 * getaddrinfo now performs destination address selection according to
5115 * Thread-safe interfaces for many functions that access locale data
5116 were added in version 2.3, but these features were omitted from NEWS.
5117 Many functions have variants with an `_l' suffix that take a `locale_t'
5118 object as a parameter rather than consulting the current locale.
5119 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
5120 create and maintain `locale_t' objects. Additionally, the new function
5121 `uselocale' sets "the current locale" (as used by functions not so
5122 parameterized) set for an individual thread. These features were added
5123 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
5125 * The functions getresuid, getresgid, setresuid, and setresgid, which
5126 have long been available on Linux, are now declared in <unistd.h>
5127 and are now also available on the Hurd.
5129 * ELF thread-local storage support (TLS) now works on x86-64.
5131 * The new dynamic string token $LIB is expanded in shared library names.
5132 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
5134 * Aldy Hernandez contributed complete software floating point support for
5135 PowerPC machines with no FPU.
5137 * fexecve is implemented on Linux.
5139 * The `btowc' function should work at least twice as fast due to
5140 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
5142 * With approriate thread add-ons cancelable functions are now implemented
5143 in libc.so as well. No need to call the function in libpthread. This
5144 change allowed to finally disable the incorrect and expensive handling
5145 of weak definition in ld.so.
5147 * Yet more PLT entries in libc.so have been removed. We finally arrived
5148 at the bare minimum. Startup times improved appropriately.
5150 * Support for the new Linux/x86 system call interface was added. The
5151 AT_SYSINFO auxiliary vector entry is recognized and handled.
5155 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
5158 * iconv (the program and the interface) now accepts empty names (excluding
5159 options like //TRANSLIT) to mean "use charset of current locale".
5161 * localedef can now transliterate characters in strings which are not in
5162 the provided charmap. The information from the input locale is used.
5164 * Prelinking support was added for ELF targets. This requires additional
5165 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
5167 * Read-only stdio streams now use mmap to speed up operation by eliminating
5168 copying and buffer underflows. To use add 'm' to the mode string of
5169 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
5171 * The malloc functions were completely rewritten by Wolfram Gloger based
5172 on Doug Lea's malloc-2.7.0.c.
5174 * Isamu Hasegawa contributed a completely new and POSIX-conformant
5175 implementation of regex.
5177 * Bruno Haible upgraded the iconv and locale implementation to support
5180 * Contents of the LC_* and LANG environment variables in the CEN style are
5181 not recognized anymore. It never was used. Change by Ulrich Drepper.
5183 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
5184 thread-local storage (TLS) ABI on some platforms.
5185 Changes by Ulrich Drepper. SH support by Kaz Kojima.
5187 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
5188 EUC-JISX0213, and TSCII.
5190 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
5191 BSD-compatible interface for getting all network interface addresses.
5192 Implementation for IPv4 by Roland McGrath.
5194 * Loading of locale data is faster due to the introduction of a locale
5195 archive. Implemented by Roland McGrath and Ulrich Drepper.
5197 * Startup times are significantly reduced by not using exported functions
5198 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
5201 * Steven Munroe contributed a port to PowerPC64/Linux.
5205 * The Hurd now uses the GNU libio implementation of stdio rather than the
5206 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
5208 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
5209 with the same behavior as the Linux system call of the same name.
5213 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
5214 128-bit long double format.
5216 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
5217 IBM1161, and IBM1162 charsets.
5219 * Andreas Jaeger contributed a port to x86-64/Linux.
5221 * Peter Bruin contributed a port to PowerPC/Hurd.
5223 * libc functions using I/O streams now can handle wide-oriented streams
5226 * optimizations in the dynamic linker. Binaries created by recent binutils
5227 versions start up quicker due to reduced time spent on relocations.
5229 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
5233 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
5234 asinh, atanh, j0 for the 128-bit long double format.
5236 * Bruno Haible updated all the code handling Unicode in some form to
5237 support Unicode 3.1.
5239 * Speed of regex for single-byte locales is back to previous levels.
5240 Patch by Isamu Hasegawa.
5242 * Alpha, SPARC, and IA-64 now also using floating stacks.
5244 * Startup time of internationalized applications greatly improved through
5245 iconv cache. Use iconvconfig to generate the cache file.
5246 Contributed by Ulrich Drepper.
5248 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
5249 severe performance problems. Patch by David Mosberger.
5251 * The Hurd port got a lot more functionality like AIO, various stdio
5252 extensions, etc. Mainly done by Roland McGrath.
5254 * mtrace can now lookup symbols in shared libraries.
5258 * Intel's IA-64 math library is largely integrated. It provides fast and
5259 accurate implementatations for most basic and standard math functions
5260 in float, double, and long double format.
5262 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
5263 and asin for the 96-bit long double format and asin, log, tan for the
5264 128-bit long double format.
5266 * The beginning of a last-bit accurate math library by IBM Haifa were added.
5267 The basic double functions exist today. Contributed by Abraham Ziv
5268 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
5269 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
5271 * An asynchronous name lookup library was added. The interface is designed
5272 after POSIX AIO. The proposal was circulated beforehand to get comments.
5273 No negative ones came in. Implemented by Ulrich Drepper.
5275 * Port to S390/64bit contributed by Martin Schwidefsky
5276 <schwidefsky@de.ibm.com>.
5278 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
5279 of functions for Linux/IA-64.
5281 * The RPC code is now thread safe. Threads can now use the same service
5282 of different services at the same time. Patch by Eric Norum
5283 <eric.norum@usask.ca> with some help by Ulrich Drepper.
5285 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
5286 family of functions for Linux/S390.
5288 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
5289 of functions for Linux/x86.
5291 * Port to Linux/CRIS contributed by Axis Communications.
5295 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
5296 we can now check for namespace violations and missing declarations. The
5297 result is that almost all headers are now Unix-compliant (as defined in
5298 the upcoming XPG6). The negative side is that some programs might need
5299 corrections, too, if they depend on the incorrect form of the headers in
5300 previous versions which defined too many symbols and included too many
5303 * regex now handles multibyte character sets correctly.
5304 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
5306 * iconv (the program) does now conform to the upcoming XPG6 and handles
5307 charmaps. Instead of the charset names the path of charmaps can be
5308 provided and the conversion happens based on this data.
5309 Contributed by Ulrich Drepper.
5311 * The locale program now provides detailed information about the installed
5316 only lists the names of the supported locales
5320 provides details such as country, language, and codeset name.
5321 Contributed by Ulrich Drepper.
5325 * The gencat program now parses the input file according to the charset
5326 selected by the LC_CTYPE category. This is important for stateful
5327 character sets. To make generating catalogs easier there is a way
5328 to overwrite the charset selected by the locale: before the first
5329 message or $ quote line the catalog can contain a line like
5331 $ codeset=ISO-8859-2
5333 to select the charset (ISO-8859-2 in this case).
5335 Implemented by Shinya Hanataka and Ulrich Drepper.
5337 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5338 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5339 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5341 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5342 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5344 * The LANGUAGE environment variable is now ignored unless the locale is
5345 changed from the default "C" locale.
5347 * The usual bug fixes.
5351 * Greg McGary added runtime support for bounds checking using gcc's
5352 new -fbounded-pointers option. ix86 target is complete. PowerPC
5355 * Thorsten Kukuk added secure mode support to nscd.
5357 * The Berkeley db libraries have been removed.
5359 Related, the nss_db module is now in a separate package since it
5360 obviously requires a database library being available.
5362 * Wide character I/O streams implemented by Ulrich Drepper.
5364 * Functions from the extended socket API added by Ulrich Drepper.
5366 * Functions feenableexcept and fedisableexcept to control the
5367 behaviour of individual exceptions have been added by Andreas Jaeger.
5369 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5371 * The resolver code has been updated from bind 8.2.3-T5B which supports
5372 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5375 This change could in some situations effect backward compatibility. Since
5376 now `_res' is a thread-local instead of a global variable, modifying it
5377 in one thread does not have any effect in other threads.
5379 The resolver library was also extended to allow IPv6 as the transport
5380 protocol for the requests. This work was done by Stig Venaas.
5382 * Compatibility code for K&R C compilers has been removed from the
5383 header files. A ISO C compiler is needed to use the library
5384 (conforming to either C89 or C99 standard).
5386 * Complete rewrite of the localedef program to support multibyte character
5387 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5388 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5389 Implemented by Ulrich Drepper.
5391 Bruno Haible significantly improved the generation and use of the data
5392 structures for the wide character tables.
5394 * Plural handling in gettext implemented by Ulrich Drepper.
5396 * The utmp daemon has been removed.
5398 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5400 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5403 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5405 * POSIX barriers implemented by Kaz Kylheku.
5407 * POSIX spawn function family implemented by Ulrich Drepper.
5409 * POSIX spinlocks are now available.
5411 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5413 * the configure option --enable-kernel=X.Y.Z allows to strip out
5414 compatibility for kernel versions before X.Y.Z. This is currently only
5415 implemented for Linux.
5417 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5418 field sin6_scope_id. This means that all programs using IPv6 should be
5419 recompiled. Don't expect binary compatibility with previous glibc
5422 * various conversion modules for IBM character sets contributed by
5425 * IA-64 port by Jes Sorensen and HJ Lu.
5439 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5441 * New xdr functions are added; some rpc functions are now 64bit clean.
5443 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5445 * Fixed known incompatibilities with glibc 2.0.
5447 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5449 * Optimized a number of functions (especially the ELF dynamic loader).
5451 * Update timezone data files.
5453 * lots of charmaps corrections
5455 * some new locale definitions and charmaps
5460 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5461 conform to POSIX member type requirements. Symbol versions have been
5462 adjusted as needed within the library, and for direct use by applications,
5463 but there is potential for problems if third-party libraries use
5464 struct timeval as part of their interface. This does not present
5465 a problem for X and other "essential" system libraries.
5467 * An additional locale model to support C++ Standard Library locale
5468 model and probably more was implemented by Ulrich Drepper.
5470 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5473 * Miles Bader provided the `argp' function family to support hierachical
5474 command line argument parsing, layered on top of getopt.
5476 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5478 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5481 * scanf recognizes the %a and %A format for scanning floating point numbers.
5483 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5484 information and interfaces for the available integer types.
5486 * about 130 new math functions were added to implement the ISO C9x math
5489 * the new header <complex.h> contains definitions of the complex math
5490 functions from ISO C 9X.
5492 * the new header <tgmath.h> defines generic macros to use complex or
5493 real valued functions.
5495 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5497 * Andreas Jaeger provided a test suite for the math library.
5499 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5501 * Ulrich Drepper added character set conversion functions (iconv).
5503 * Optimized string functions have been added.
5505 * The localedata addon is now part of glibc.
5507 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5509 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5510 daemon for NSS (nscd).
5512 Missing a better place here are some numbers on improvements. Under
5513 Linux 2.1.125 un-tar-ing the kernel sources takes
5517 using local files 12.19s 6.88s 22.91s
5519 using NIS 13.92s 8.91s 26.34s
5521 using NIS & nscd 10.37s 7.34s 25.30s
5523 using NIS+ 27.57s 30.37s 640.46s
5525 using NIS+ & nscd 10.25s 7.83s 26.51s
5527 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5529 Keep in mind that non-namelookup related operations dominate above times.
5530 It was just a common complain that using NIS+ unpacking the kernel is
5533 [1] The old nscd implementation is not available anymore since it was
5534 distributed with glibc up to version 2.0.98 and thus is now replaced.
5536 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5538 * Mark Kettenis provided a Hesiod NSS module.
5540 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5541 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5543 * rcmd can now handle netgroups (Dick Streefland).
5545 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5548 * Support for the IPv6 protocol has been added to the socket API, as per the
5549 latest draft standards.
5551 * Support for Linux 2.2 has been added.
5553 * Interface changes relative to the latest 2.0.x release:
5554 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5555 addseverity NEW: Unix98
5556 alphasort64 NEW: LFS
5557 argp_err_exit_status NEW: argp, GNU ext
5558 argp_error NEW: argp, GNU ext
5559 argp_failure NEW: argp, GNU ext
5560 argp_help NEW: argp, GNU ext
5561 argp_parse NEW: argp, GNU ext
5562 argp_program_bug_address NEW: argp, GNU ext
5563 argp_program_version NEW: argp, GNU ext
5564 argp_program_version_hook NEW: argp, GNU ext
5565 argp_state_help NEW: argp, GNU ext
5566 argp_usage NEW: argp, GNU ext
5567 authdes_create NEW: Secure RPC
5568 authdes_getucred NEW: Secure RPC
5569 authdes_pk_create NEW: Secure RPC
5570 backtrace NEW: GNU ext.
5571 backtrace_symbols NEW: GNU ext.
5572 backtrace_symbols_fd NEW: GNU ext.
5574 cacosf NEW: ISO C 9x
5575 cacosh NEW: ISO C 9x
5576 cacoshf NEW: ISO C 9x
5577 cacoshl NEW: ISO C 9x
5578 cacosl NEW: ISO C 9x
5585 casinf NEW: ISO C 9x
5586 casinh NEW: ISO C 9x
5587 casinhf NEW: ISO C 9x
5588 casinhl NEW: ISO C 9x
5589 casinl NEW: ISO C 9x
5591 catanf NEW: ISO C 9x
5592 catanh NEW: ISO C 9x
5593 catanhf NEW: ISO C 9x
5594 catanhl NEW: ISO C 9x
5595 catanl NEW: ISO C 9x
5596 cbc_crypt NEW: Secure RPC
5600 ccoshf NEW: ISO C 9x
5601 ccoshl NEW: ISO C 9x
5607 cimagf NEW: ISO C 9x
5608 cimagl NEW: ISO C 9x
5609 clearerr_locked REMOVED
5610 clntunix_create NEW: sunrpc ext
5612 clog10 NEW: ISO C 9x
5613 clog10f NEW: ISO C 9x
5614 clog10l NEW: ISO C 9x
5624 cprojf NEW: ISO C 9x
5625 cprojl NEW: ISO C 9x
5627 crealf NEW: ISO C 9x
5628 creall NEW: ISO C 9x
5633 csinhf NEW: ISO C 9x
5634 csinhl NEW: ISO C 9x
5637 csqrtf NEW: ISO C 9x
5638 csqrtl NEW: ISO C 9x
5642 ctanhf NEW: ISO C 9x
5643 ctanhl NEW: ISO C 9x
5645 des_setparity NEW: Secure RPC
5646 ecb_crypt NEW: Secure RPC
5647 endutxent NEW: Unix98
5649 exp10f NEW: ISO C 9x
5650 exp10l NEW: ISO C 9x
5654 fattach NEW: STREAMS
5655 fdetach NEW: STREAMS
5659 feclearexcept NEW: ISO C 9x
5660 fegetenv NEW: ISO C 9x
5661 fegetexceptflag NEW: ISO C 9x
5662 fegetround NEW: ISO C 9x
5663 feholdexcept NEW: ISO C 9x
5665 feraiseexcept NEW: ISO C 9x
5666 ferror_locked REMOVED
5667 fesetenv NEW: ISO C 9x
5668 fesetexceptflag NEW: ISO C 9x
5669 fesetround NEW: ISO C 9x
5670 fetestexcept NEW: ISO C 9x
5671 feupdateenv NEW: ISO C 9x
5672 fflush_locked REMOVED
5676 fgets_unlocked NEW: GNU ext.
5677 fileno_locked REMOVED
5689 fputc_locked REMOVED
5690 fputs_unlocked NEW: GNU ext.
5691 fread_unlocked NEW: GNU ext.
5696 fstatvfs NEW: Unix98
5700 ftruncate64 NEW: LFS
5702 fwrite_unlocked NEW: GNU ext.
5703 gai_strerror NEW: IPv6
5707 getchar_locked REMOVED
5709 getdate_err NEW: Unix98
5710 getdate_r NEW: GNU ext.
5712 getnameinfo NEW: IPv6
5713 getnetname NEW: Secure RPC
5714 getpmsg NEW: STREAMS
5715 getpt NEW: Unix98 PTY
5716 getrlimit64 NEW: LFS
5717 getutxent NEW: Unix98
5718 getutxid NEW: Unix98
5719 getutxline NEW: Unix98
5720 glob64 NEW: GNU ext.
5721 globfree64 NEW: GNU ext.
5722 gnu_get_libc_release NEW: GNU ext.
5723 gnu_get_libc_version NEW: GNU ext.
5724 grantpt NEW: Unix98 PTY
5725 host2netname NEW: Secure RPC
5727 iconv_close NEW: iconv
5728 iconv_open NEW: iconv
5729 if_freenameindex NEW: IPv6
5730 if_indextoname NEW: IPv6
5731 if_nameindex NEW: IPv6
5732 if_nametoindex NEW: IPv6
5733 in6addr_any NEW: IPv6
5734 in6addr_loopback NEW: IPv6
5735 inet6_isipv4mapped NEW: IPv6
5736 isastream NEW: STREAMS
5737 iswblank NEW: GNU ext.
5738 key_decryptsession NEW: Secure RPC
5739 key_decryptsession_pk NEW: Secure RPC
5740 key_encryptsession NEW: Secure RPC
5741 key_encryptsession_pk NEW: Secure RPC
5742 key_gendes NEW: Secure RPC
5743 key_get_conv NEW: Secure RPC
5744 key_secretkey_is_set NEW: Secure RPC
5745 key_setnet NEW: Secure RPC
5746 key_setsecret NEW: Secure RPC
5747 llrint NEW: ISO C 9x
5748 llrintf NEW: ISO C 9x
5749 llrintl NEW: ISO C 9x
5750 llround NEW: ISO C 9x
5751 llroundf NEW: ISO C 9x
5752 llroundl NEW: ISO C 9x
5757 lrintf NEW: ISO C 9x
5758 lrintl NEW: ISO C 9x
5759 lround NEW: ISO C 9x
5760 lroundf NEW: ISO C 9x
5761 lroundl NEW: ISO C 9x
5763 makecontext NEW: Unix98
5764 mempcpy NEW: GNU ext.
5767 modify_ldt NEW: kernel
5771 nearbyint NEW: ISO C 9x
5772 nearbyintf NEW: ISO C 9x
5773 nearbyintl NEW: ISO C 9x
5774 netname2host NEW: Secure RPC
5775 netname2user NEW: Secure RPC
5776 nexttoward NEW: ISO C 9x
5777 nexttowardf NEW: ISO C 9x
5778 nexttowardl NEW: ISO C 9x
5782 passwd2des NEW: Secure RPC
5784 pow10f NEW: GNU ext.
5785 pow10l NEW: GNU ext.
5788 printf_size NEW: GNU ext.
5789 printf_size_info NEW: GNU ext.
5790 profil_counter REMOVED
5791 pthread_mutexattr_getkind_np REPLACED
5792 pthread_mutexattr_setkind_np REPLACED
5793 ptsname NEW: Unix98 PTY
5794 ptsname_r NEW: Unix98 PTY
5796 putchar_locked REMOVED
5797 putgrent NEW: GNU ext.
5799 putpmsg NEW: STREAMS
5800 pututxline NEW: Unix98
5804 readdir64_r NEW: LFS
5805 remquo NEW: ISO C 9x
5806 remquof NEW: ISO C 9x
5807 remquol NEW: ISO C 9x
5809 roundf NEW: ISO C 9x
5810 roundl NEW: ISO C 9x
5812 scalbln NEW: ISO C 9x
5813 scalblnf NEW: ISO C 9x
5814 scalblnl NEW: ISO C 9x
5816 sendfile NEW: kernel
5817 setcontext NEW: Unix98
5818 setrlimit64 NEW: LFS
5819 setutxent NEW: Unix98
5821 sigignore NEW: Unix98
5822 sigqueue NEW: POSIX.1b
5823 sigrelse NEW: Unix98
5824 sigset NEW: POSIX.1b
5825 sigtimedwait NEW: POSIX.1b
5826 sigwaitinfo NEW: POSIX.1b
5827 sincos NEW: GNU ext.
5828 sincosf NEW: GNU ext.
5829 sincosl NEW: GNU ext.
5833 strcasestr NEW: GNU ext.
5834 strtoimax NEW: ISO C 9x
5835 strtoumax NEW: ISO C 9x
5836 strverscmp NEW: GNU ext.
5837 svcauthdes_stats NEW: Secure RPC
5838 svcunix_create NEW: sunrpc etx
5839 svcunixfd_create NEW: sunrpc ext
5840 swapcontext NEW: Unix98
5841 tcgetsid NEW: Unix98 PTY
5842 tdestroy NEW: GNU ext.
5843 tgamma NEW: ISO C 9x
5844 tgammaf NEW: ISO C 9x
5845 tgammal NEW: ISO C 9x
5849 truncf NEW: ISO C 9x
5850 truncl NEW: ISO C 9x
5852 unlockpt NEW: Unix98 PTY
5853 updwtmpx NEW: Unix98
5854 user2netname NEW: Secure RPC
5855 utmpxname NEW: Unix98
5856 versionsort NEW: GNU ext.
5857 versionsort64 NEW: GNU ext.
5859 wcscasecmp NEW: GNU ext.
5860 wcsncasecmp NEW: GNU ext.
5861 wcsnlen NEW: GNU ext.
5862 wcstoimax NEW: ISO C 9x
5863 wcstoll NEW: ISO C 9x
5864 wcstoull NEW: ISO C 9x
5865 wcstoumax NEW: ISO C 9x
5867 wordexp NEW: POSIX.2
5868 wordfree NEW: POSIX.2
5869 write_profiling REMOVED
5870 xdecrypt NEW: Secure RPC
5871 xdr_authdes_cred NEW: Secure RPC
5872 xdr_authdes_verf NEW: Secure RPC
5873 xdr_cryptkeyarg NEW: Secure RPC
5874 xdr_cryptkeyarg2 NEW: Secure RPC
5875 xdr_cryptkeyres NEW: Secure RPC
5876 xdr_getcredres NEW: Secure RPC
5877 xdr_key_netstarg NEW: Secure RPC
5878 xdr_key_netstres NEW: Secure RPC
5879 xdr_keybuf NEW: Secure RPC
5880 xdr_keystatus NEW: Secure RPC
5881 xdr_netnamestr NEW: Secure RPC
5882 xdr_sizeof NEW: Secure RPC
5883 xdr_unixcred NEW: sunrpc ext
5884 xencrypt NEW: Secure RPC
5885 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5896 * inet_ntoa is thread-safe
5898 * updwtmp is moved from libutil to libc
5900 * rewrite of cbrt function
5902 * update of timezone data
5916 * add atoll function
5918 * fix complex problems in Berkeley DB code
5920 * fix math functions
5924 * fixed lots of header problems (especially Linux/GNU specific)
5926 * dynamic loader preserves all registers
5928 * Roland McGrath provided support for handling of auxiliary objects in
5929 the ELF dynamic loader.
5931 * support for parallel builds is improved
5935 * GNU extensions are no longer declared by default. To enable them you
5936 must define the macro `_GNU_SOURCE' in your program or compile with
5939 * The library has changed from using GNU ld symbol aliases to using weak
5940 symbols where available. The ELF object file format supports weak
5941 symbols; GNU ld also supports weak symbols in the a.out format. (There
5942 is also now support for other GNU ld extensions in ELF. Use the
5943 `--with-elf' option to configure to indicate you have ELF, and
5944 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5945 of many files which contained only symbol aliases, reducing the size of
5946 the source and the compiled library; many other files were renamed to
5947 less cryptic names previously occupied by the symbol alias files.
5948 There is a new header file <elf.h> for programs which operate on
5949 files in the ELF format.
5951 * Converted to Autoconf version 2, so `configure' has more options.
5952 Run `configure --help' to see the details.
5954 * The library can now be configured to build profiling, highly-optimized
5955 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5956 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5957 `configure' enable building these extra libraries. The shared library is
5958 built by default when using both ELF and GNU ld. When shared libraries
5959 are enabled, the new library `-ldl' is available for arbitrary run-time
5960 loading of shared objects; its interface is defined in <dlfcn.h>. The
5961 new header file <link.h> gives access to the internals of the run-time
5962 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5963 application of same name on other systems and it provides information
5964 about dynamically linked binaries.
5966 * The C library now provides the run-time support code for profiling
5967 executables compiled with `-pg'. Programs can control the profiling code
5968 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5969 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5970 the support for this file format was contributed by David Mosberger-Tang.
5972 * The math code has been replaced with a math library based on fdlibm from
5973 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5974 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5975 functions. The math functions now reside in a separate library, so
5976 programs using them will need to use `-lm' their linking commands.
5978 * John C. Bowman contributed optimized ix87 assembler inline functions.
5980 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5981 mechanism similar to that found in Solaris 2. This is now used for the
5982 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5983 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5984 file controls what services are used for each individual database. This
5985 works by loading shared libraries with names specified in `nsswitch.conf',
5986 so service modules can be changed or added at any time without even
5987 relinking any program. Currently there are the file, db, and NIS based
5988 NSS services available.
5990 * The new functions `strtoq' and `strtouq' parse integer values from
5991 strings, like `strtol' and `strtoul', but they return `long long int' and
5992 `unsigned long long int' values, respectively (64-bit quantities).
5994 * The new functions `strtof' and `strtold' parse floating-point values from
5995 strings, like `strtod', but they return `float' and `long double' values,
5996 respectively (on some machines `double' and `long double' are the same).
5998 * Ulrich Drepper has contributed new implementations of the floating-point
5999 printing and reading code used in the `printf' family of functions and
6000 `strtod', `strtof', and `strtold'. These new functions are perfectly
6001 accurate, and much faster than the old ones.
6003 * The implementation of the POSIX locale model was completely rewritten by
6004 Ulrich Drepper. This includes the new programs `localedef' and `locale'
6005 to compile the POSIX locale definition.
6007 * The former dummy implementations of the strcoll and strxfrm function are
6008 now replaced by fully functional code contributed by Ulrich Drepper. The
6009 collation information comes from the POSIX locale definitions.
6011 * The new header <langinfo.h> defines an interface for accessing
6012 various locale-dependent data (using the locale chosen with `setlocale').
6014 * Ulrich Drepper has contributed a new suite of functions for operation on
6015 wide-character and multibyte-character strings, in <wchar.h>;
6016 and classification and case conversion of wide characters, in <wctype.h>.
6017 These new functions are conforming to the ISO C, Amendement 1 specification.
6019 * There is now a second implementation of the standard I/O library available.
6020 It comes from GNU libg++ as was written by Per Bothner, heavily modified
6021 by Hongjiu Lu and made thread safe by Ulrich Drepper.
6023 * You can now use positional parameter specifications in format strings
6024 for the `printf' and `scanf' families of functions. For example,
6025 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
6026 ``Number 6, Mr Jones''. This is mainly useful when providing different
6027 format strings for different languages, whose grammars may dictate
6028 different orderings of the values being printed. To support this
6029 feature, the interface for `register_printf_handler' has changed; see
6030 the header file <printf.h> for details.
6032 * The `printf' and `scanf' families of functions now understand a new
6033 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
6034 to group numbers as indicated by the locale; for `scanf' and friends, this
6035 says to accept as valid only a number with all the proper grouping
6036 separators in the right places. In the default "C" locale, numbers are
6037 not grouped; but locales for specific countries will define the usual
6038 conventions (i.e. separate thousands with `,' in the US locale).
6040 * The pgrp functions have been regularized, slightly incompatibly but much
6041 less confusingly. The core functions are now `getpgid' and `setpgid',
6042 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
6043 argument) and BSD `setpgrp' (identical to `setpgid') functions are
6044 provided for compatibility. There is no longer an incompatible `getpgrp'
6045 with an argument declared under _BSD_SOURCE; no BSD code uses it.
6047 * The new header file <fts.h> and suite of functions simplify programs that
6048 operate on directory trees. This code comes from 4.4 BSD.
6050 * The resolver code has been updated from the BIND 4.9.5-P1 release.
6051 Parts of the code were heavily modified by Ulrich Drepper to fit in the
6052 NSS scheme used in glibc.
6054 * There is a new malloc debugging hook `__memalign_hook'.
6056 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
6057 `unsigned int' in <sys/types.h>. These are for compatibility only and
6058 their use is discouraged.
6060 * The `-lmcheck' library to enable standard malloc debugging hooks is now
6061 done differently, so that it works even without GNU ld.
6063 * New function `euidaccess' checks allowed access to a file like `access',
6064 but using the effective IDs instead of the real IDs.
6066 * The time zone data files have been updated for the latest and greatest
6067 local time conventions of the countries of the world.
6069 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
6072 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
6073 for formatting floating-point numbers. They are provided only for
6074 compatibility; new programs should use `sprintf' instead. There are
6075 also equivalent function for the `long double' floating-point type and
6076 all functions also exist in a reentrant form.
6078 * The new auxiliary library `-lutil' from 4.4 BSD contains various
6079 functions for maintaining the login-record files (primarily of use to
6080 system programs such as `login'), and convenient functions for
6081 allocating and initializing a pseudo-terminal (pty) device.
6083 * Ulrich Drepper has contributed new support for System V style
6084 shared memory and IPC on systems that support it.
6086 * Ulrich Drepper has contributed several miscellaneous new functions found
6087 in System V: The `hsearch' family of functions provide an effective
6088 implementation of hash tables; `a64l' and `l64a' provide a very simple
6089 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
6092 * Ulrich Drepper has contributed new reentrant counterparts for the
6093 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
6095 * Ulrich Drepper has contributed new, highly-optimized versions of several
6096 string functions for the i486/Pentium family of processors.
6098 * Ulrich Drepper has updated the Linux-specific code, based largely
6099 on work done in Hongjiu Lu's version of GNU libc for Linux.
6100 The GNU library now supports Linux versions 2.0.10 and later,
6101 using the ELF object file format (i[3456]86-*-linux).
6103 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
6105 * David Mosberger-Tang and Richard Henderson have ported the C library
6106 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
6107 dynamic linking support for ELF/Alpha.
6109 * Richard Henderson contributed several Alpha optimized assembler function
6110 for arithmetic and string handling.
6112 * Ulrich Drepper has contributed a new set of message catalog functions to
6113 support multiple languages using the <libintl.h> interface, for use with
6114 his new package GNU gettext. Translation volunteers have contributed
6115 catalogs of the library's messages in Spanish, German, and Korean.
6117 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
6118 program and the `catgets' function for reading the catalog files it
6119 creates. (The <libintl.h> interface is preferred; we include the
6120 <nl_types.h> interface using `catgets' only for source compatibility with
6121 programs already written to use it.)
6123 * New header file <values.h> gives SVID-compatible names for <limits.h>
6126 * Various new macros, declarations, and small header files for compatibility
6129 * New function `group_member' is a convenient way to check if a process has
6130 a given effective group ID.
6132 * When using GCC 2.7 and later, the socket functions are now declared in a
6133 special way so that passing an argument of type `struct sockaddr_in *',
6134 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
6135 `struct sockaddr *' type, does not generate a type-clash warning.
6137 * New function `error' declared in header file <error.h> is a convenient
6138 function for printing error messages and optionally exiting; this is the
6139 canonical function used in GNU programs. The new functions `err', `warn',
6140 and friends in header file <err.h> are the canonical 4.4 BSD interface for
6141 doing the same thing.
6143 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
6144 POSIX.2 `glob' function to do ~ and {...} expansion.
6146 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
6147 `clearenv' which is used in POSIX.9 is also available.
6149 * New function `getsid' returns session ID number on systems that support it.
6151 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
6152 files <db.h> and <mpool.h> provide a rich set of functions for several
6153 types of simple databases stored in memory and in files, and <ndbm.h> is
6154 an old `ndbm'-compatible interface using the `db' functions. Link with
6155 `-ldb' to get these functions.
6157 * New macro `strdupa' copies a string like `strdup', but uses local stack
6158 space from `alloca' instead of dynamic heap space from `malloc'.
6160 * New function `strnlen' is like `strlen' but searches only a given maximum
6161 number of characters for the null terminator. `stpncpy', `strndup' and
6162 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
6165 * New function `statfs' in header <sys/statfs.h>.
6167 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
6168 provide convenient functions for operating on blocks of null-terminated
6171 * A new suite of functions in <utmp.h> handle all the details of reading
6172 and writing the utmp file.
6174 * An implementation of the NIS/YP(tm) based NSS service was contributed by
6177 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
6178 completely POSIX compliant and also implemented the extended functionality
6179 to handle alternate digit representation and alternate era date formats.
6181 * Ulrich Drepper provided an implementation of the `strptime' function
6182 defined in XPG4.2 which transforms a string into a `struct tm' value.
6184 * Paul Eggert provided the tzselect shell script as part of the timezone
6185 code. The shell script makes it easy to select the correct timezone
6188 * The implementation of the malloc family of functions is completely replaced
6189 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
6190 The implementation uses the mmap function (if available) and it is
6191 optimized for the use in multi threaded programs.
6193 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
6194 functions. This new functionality is usable by specifying a special
6195 salt string and it is compatible with implementation on *BSD systems.
6197 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
6198 `getsubopt' to handle second level command line options, `bsd_signal'
6199 to access BSD style `signal' functionality, the obsolete `regexp' style
6202 * the `lchown' function is available on system which support this
6205 * The implementation of the shadow password handling function was contributed
6208 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
6210 * POSIX.1g support was added. The <sys/select.h> header is available,
6211 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
6212 implementation of `getaddrinfo'.
6216 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
6218 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
6219 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
6221 * The new function `daemon' from 4.4 BSD is useful for server programs that
6222 want to put themselves in the background.
6224 * Joel Sherrill has contributed support for several standalone boards that
6225 run without an operating system.
6227 * `printf', `scanf' and friends now accept a `q' type modifier for long
6228 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
6230 * All of the code taken from BSD (notably most of the math and networking
6231 routines) has been updated from the BSD 4.4-Lite release.
6233 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
6235 * The new functions `getdomainname' and `setdomainname' fetch or change the
6236 YP/NIS domain name. These are system calls which exist on systems which
6239 * The time zone data files have been updated for the latest international
6242 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
6243 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
6247 * The C library now includes support for Sun RPC, from Sun's free
6248 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
6249 are included. (There is still no support for YP.)
6251 * Tom Quinn has contributed a port of the C library to SGI machines running
6252 Irix 4 (mips-sgi-irix4).
6254 * The new `lockf' function is a simplified interface to the locking
6255 facilities of `fcntl', included for compatibility.
6257 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
6259 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
6261 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
6264 * The error message printed by `assert' for a failed assertion now includes
6265 the name of the program (if using GNU ld) and the name of the calling
6266 function (with versions of GCC that support this).
6268 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
6270 * The library now includes the <sys/mman.h> header file and memory
6271 management functions `mmap', `munmap', `mprotect', `msync', and
6272 `madvise', on systems that support those facilities.
6274 * The interface for `mcheck' has changed slightly: the function called to
6275 abort the program when an allocation inconsistency is detected now takes
6276 an argument that indicates the type of failure. The new function
6277 `mprobe' lets you request a consistency check for a particular block at
6278 any time (checks are normally done only when you call `free' or `realloc'
6281 * It is now possible to easily cross-compile the C library, building on one
6282 system a library to run on another machine and/or operating system. All
6283 you need to do is set the variable `HOST_CC' in `configparms' to the
6284 native compiler for programs to run on the machine you are building on (a
6285 few generator programs are used on Unix systems); set `CC' to the
6288 * The new function `fexecve' (only implemented on the GNU system) executes
6289 a program file given a file descriptor already open on the file.
6293 * Brendan Kehoe has contributed most of a port to the DEC Alpha
6294 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
6296 * You can set the variable `libprefix' in `configparms' to specify a prefix
6297 to be prepended to installed library files; this makes it easy to install
6298 the GNU C library to be linked as `-lgnuc' or whatever.
6300 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
6301 copies a limited number of characters from a string, and returns the
6302 address of the last character written.
6304 * You no longer need to check for whether the installed `stddef.h' is
6305 compatible with the GNU C library. configure now checks for you.
6307 * You can now define a per-stream `fileno' function to convert the
6308 stream's cookie into an integral file descriptor.
6310 * ``malloc (0)'' no longer returns a null pointer. Instead, it
6311 allocates zero bytes of storage, and returns a unique pointer which
6312 you can pass to `realloc' or `free'. The behavior is undefined if
6313 you dereference this pointer.
6315 * The C library now runs on Sony NEWS m68k machines running either
6316 NewsOS 3 or NewsOS 4.
6318 * The new `syscall' function is a system-dependent primitive function
6319 for invoking system calls. It has the canonical behavior on Unix
6320 systems, including unreliable return values for some calls (such as
6321 `pipe', `fork' and `getppid').
6323 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6324 to `EAGAIN', which is the preferred name. On systems whose kernels
6325 use two distinct codes, the C library now translates EWOULDBLOCK to
6326 EAGAIN in every system call function.
6330 * The GNU C Library Reference Manual is now distributed with the library.
6331 `make dvi' will produce a DVI file of the printed manual.
6332 `make info' will produce Info files that you can read on line using C-h i
6333 in Emacs or the `info' program.
6334 Please send comments on the manual to bug-glibc-manual@gnu.org.
6336 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6338 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6340 * Jason Merrill has contributed a port to the Sequent Symmetry running
6341 Dynix version 3 (i386-sequent-dynix).
6343 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6344 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6346 * New function `memory_warnings' lets you arrange to get warnings when
6347 malloc is running out of memory to allocate, like Emacs gives you.
6349 * The C library now contains the relocating allocator used in Emacs 19 for
6350 its editing buffers. This allocator (ralloc) minimizes allocation
6351 overhead and fragmentation by moving allocated regions around whenever it
6352 needs to. You always refer to a ralloc'd region with a "handle" (a
6353 pointer to a pointer--an object of type `void **').
6355 * There is a new `printf' format: `%m' gives you the string corresponding
6356 to the error code in `errno'.
6358 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6359 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6360 pass, the `a' modifier says to fill in a `char **' you pass with a
6363 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6364 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6365 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6367 * `mkstemp' is a traditional Unix function to atomically create and open a
6368 uniquely-named temporary file.
6372 * The standard location for the file that says what the local timezone is
6373 has changed again. It is now `/usr/local/etc/localtime' (or more
6374 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6376 * The distribution no longer contains any files with names longer than 14
6379 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6380 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6382 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6386 * The configuration process has changed quite a bit. The `configure'
6387 script is now used just like the configuration scripts for other GNU
6388 packages. The `sysdeps' directory hierarchy is much rearranged.
6389 The file `INSTALL' explains the new scheme in detail.
6391 * The header files no longer need to be processed into ANSI C and
6392 traditional C versions. There is just one set of files to install, and
6393 it will work with ANSI or old C compilers (including `gcc -traditional').
6395 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6396 MIPS DECStation running Ultrix 4.
6398 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6399 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6400 made itself into a shared library.
6402 * Yet further improved support for the i386, running 4.3 BSD-like systems
6403 (such as Mach 3 with the Unix single-server), or System V.
6405 * New function `strncasecmp' to do case-insensitive string comparison
6406 with limited length.
6408 * New function `strsep' is a reentrant alternative to `strtok'.
6410 * New functions `scandir' and `alphasort' for searching directories.
6412 * New function `setenv' is a better interface to `putenv'.
6414 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6415 function for traversing a directory tree.
6417 * The GNU obstack package is now also part of the C library.
6418 The new function `open_obstack_stream' creates a stdio stream that
6419 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6420 formatted output directly to an obstack.
6422 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6423 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6425 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6427 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6428 things to your strings.
6430 * There are some new test programs: test-fseek, testmb, and testrand.
6432 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6433 These ports are not finished, but are a good starting place for really
6434 supporting those systems.
6436 * `/etc/localtime' is now the standard location for the file that says what
6437 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6438 This follows the general principle that `/etc' is the place for all local
6439 configuration files.
6441 * The C library header files now use `extern "C"' when used by the C++
6442 compiler, so the C library should now work with C++ code.
6444 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6445 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6448 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6449 function which uses the `merge sort' algorithm, and is said to be
6450 significantly faster than the old GNU `qsort' function. Merge sort is
6451 now the standard `qsort' function. The new algorithm can require a lot
6452 of temporary storage; so, the old sorting function is called when the
6453 required storage is not available.
6455 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6456 provides the Unix `crypt' function, plus some other entry points.
6458 * The code and header files taken from 4.4 BSD have been updated with the
6459 latest files released from Berkeley.
6461 ----------------------------------------------------------------------
6464 Permission is granted to anyone to make or distribute verbatim copies
6465 of this document as received, in any medium, provided that the
6466 copyright notice and this permission notice are preserved,
6467 thus giving the recipient permission to redistribute in turn.
6469 Permission is granted to distribute modified versions
6470 of this document, or of portions of it,
6471 under the above conditions, provided also that they
6472 carry prominent notices stating who last changed them.
6475 version-control: never