1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2020 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 * Unicode 13.0.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 13.0.0, using
14 generator scripts contributed by Mike FABIAN (Red Hat).
16 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
18 * Support for Synopsys ARC HS cores (ARCv2 ISA) running Linux has been
19 added. This port requires at least binutils-2.32, gcc-8.3 and Linux-5.1.
20 Three ABIs are supported:
26 The arc* ABI is little-endian while arceb is big-endian. All ABIs use
27 64-bit time (y2038 safe) and 64-bit file offsets (LFS default).
29 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
30 DT_DEPAUDIT dynamic section entries of the main executable.
32 * powerpc64le supports IEEE128 long double libm/libc redirects when
33 using the -mabi=ieeelongdouble to compile C code on supported GCC
34 toolchains. It is recommended to use GCC 8 or newer when testing
37 * To help detect buffer overflows and other out-of-bounds accesses
38 several APIs have been annotated with GCC 'access' attribute. This
39 should help GCC 10 issue better warnings.
41 * On Linux, functions the pthread_attr_setsigmask_np and
42 pthread_attr_getsigmask_np have been added. They allow applications
43 to specify the signal mask of a thread created with pthread_create.
45 * The GNU C Library now provides the header file <sys/single_threaded.h>
46 which declares the variable __libc_single_threaded. Applications are
47 encouraged to use this variable for single-thread optimizations,
48 instead of weak references to symbols historically defined in
51 * The functions sigabbrev_np and sigdescr_np have been added. The
52 sigabbrev_np returns the abbreviated signal name (e.g. "HUP" for SIGHUP)
53 while sigdescr_np returns a string describing the signal number (e.g
54 "Hangup" for SIGHUP). Different than strsignal, sigdescr_np does not
55 attempt to translate the return description, both functions return
56 NULL for an invalid signal number.
58 They should be used instead of sys_siglist or sys_sigabbrev and they
59 are both thread and async-signal safe. These functions are GNU extensions.
61 * The functions strerrorname_np and strerrordesc_np have been added. The
62 strerroname_np returns error number name (e.g. "EINVAL" for EINVAL) while
63 strerrordesc_np returns string describing error number
64 (e.g "Invalid argument" for EINVAL). Different than strerror,
65 strerrordesc_np does not attempt to translate the return description, both
66 functions return NULL for an invalid error number.
68 They should be used instead of sys_errlist and sys_nerr, both are
69 thread and async-signal safe. These functions are GNU extensions.
71 * AArch64 now supports standard branch protection security hardening
72 in glibc when it is built with a GCC that is configured with
73 --enable-standard-branch-protection (or if -mbranch-protection=standard
74 flag is passed when building both GCC target libraries and glibc,
75 in either case a custom GCC is needed). This includes branch target
76 identification (BTI) and pointer authentication for return addresses
77 (PAC-RET). They require armv8.5-a and armv8.3-a architecture
78 extensions respectively for the protection to be effective,
79 otherwise the used instructions are nops. User code can use PAC-RET
80 without libc support, but BTI requires a libc that is built with BTI
81 support, otherwise runtime objects linked into user code will not be
84 Deprecated and removed features, and other changes affecting compatibility:
86 * Remove configure option --enable-obsolete-rpc. Sun RPC is removed
87 from glibc. This includes the rpcgen program, librpcsvc, and the Sun
88 RPC header files. Backward compatibility for old programs is kept
89 only for architectures and ABIs that have been added in or before
90 glibc 2.31. New programs need to use TI-RPC
91 <http://git.linux-nfs.org/?p=steved/libtirpc.git;a=summary> and
92 rpcsvc-proto <https://github.com/thkukuk/rpcsvc-proto>.
94 * Remove configure option --enable-obsolete-nsl. libnsl is only built
95 as shared library for backward compatibility and the NSS modules "nis"
96 and "nisplus" are not built at all and libnsl's headers aren't
97 installed. This compatibility is kept only for architectures and ABIs
98 that have been added in or before version 2.28. Replacement
99 implementations based on TI-RPC, which additionally support IPv6, are
100 available from <https://github.com/thkukuk/>. This change does not
101 affect the "compat" NSS module, which does not depended on libnsl
102 since 2.27 and thus can be used without NIS.
104 * The deprecated <sys/sysctl.h> header and the sysctl function have been
105 removed. To support old binaries, the sysctl function continues to
106 exist as a compatibility symbol (on those architectures which had it),
107 but always fails with ENOSYS. This reflects the removal of the system
108 call from all architectures, starting with Linux 5.5.
110 * The sstk function is no longer available to newly linked binaries.
111 Its implementation always returned with a failure, and the function
112 was not declared in any header file.
114 * The legacy signal handling functions siginterrupt, sigpause, sighold,
115 sigrelse, sigignore and sigset, and the sigmask macro have been
116 deprecated. Applications should use the sigsuspend, sigprocmask and
117 sigaction functions instead.
119 * ldconfig now defaults to the new format for ld.so.cache. glibc has
120 already supported this format for almost 20 years.
122 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
123 are no longer available to newly linked binaries, and their declarations
124 have been removed from <string.h>. They are exported solely as
125 compatibility symbols to support old binaries. All programs should use
128 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
129 are no longer available to newly linked binaries, and their declarations
130 have been removed from from <stdio.h>. They are exported solely as
131 compatibility symbols to support old binaries. All programs should use
132 strerror or strerror_r instead.
134 * Both strerror and strerror_l now share the same internal buffer in the
135 calling thread, meaning that the returned string pointer may be invalided
136 or contents might be overwritten on subsequent calls in the same thread or
137 if the thread is terminated. It makes strerror MT-safe.
139 * Using weak references to libpthread functions such as pthread_create
140 or pthread_key_create to detect the singled-threaded nature of a
141 program is an obsolescent feature. Future versions of glibc will
142 define pthread_create within libc.so.6 itself, so such checks will
143 always flag the program as multi-threaded. Applications should check
144 the __libc_single_threaded variable declared in
145 <sys/single_threaded.h> instead.
147 * The "files" NSS module no longer supports the "key" database (used for
148 secure RPC). The contents of the /etc/publickey file will be ignored,
149 regardless of the settings in /etc/nsswitch.conf. (This method of
150 storing RPC keys only supported the obsolete and insecure AUTH_DES
151 flavor of secure RPC.)
153 * The __morecore and __after_morecore_hook malloc hooks and the default
154 implementation __default_morecore have been deprecated. Applications
155 should use malloc interposition to change malloc behavior, and mmap to
156 allocate anonymous memory. A future version of glibc may require that
157 applications which use the malloc hooks must preload a special shared
158 object, to enable the hooks.
160 * The hesiod NSS module has been deprecated and will be removed in a
161 future version of glibc. System administrators are encouraged to
162 switch to other approaches for networked account databases, such as
165 Changes to build and runtime requirements:
167 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
168 long double redirects.
170 Security related changes:
172 CVE-2016-10228: An infinite loop has been fixed in the iconv program when
173 invoked with the -c option and when processing invalid multi-byte input
174 sequences. Reported by Jan Engelhardt.
176 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
177 corruption when they were passed a pseudo-zero argument. Reported by Guido
178 Vranken / ForAllSecure Mayhem.
180 CVE-2020-1752: A use-after-free vulnerability in the glob function when
181 expanding ~user has been fixed.
183 CVE-2020-6096: A signed comparison vulnerability in the ARMv7 memcpy and
184 memmove functions has been fixed. Discovered by Jason Royes and Samual
185 Dytrych of the Cisco Security Assessment and Penetration Team (See
188 The following bugs are resolved with this release:
190 [9809] localedata: ckb_IQ: new Kurdish Sorani locale
191 [10441] manual: Backtraces code example lacks error checking
192 [10815] librt: [timer_create / SIGEV_THREAD] signalmask of
193 timer_sigev_thread dangerous
194 [14231] stdio: stdio-common tests memory requirements
195 [14578] libc: /proc-based emulation for lchmod, fchmodat
196 [16272] dynamic-link: dlopen()ing a DT_FILTER library crashes if
197 filtee has constructor
198 [19519] locale: iconv(1) with -c option hangs on illegal multi-byte
199 sequences (CVE-2016-10228)
200 [19737] admin: Doc page “20.5.2 Infinity and NaN” has incorrect HTML
201 character entities for infinity & pi
202 [20338] libc: Parsing of /etc/gshadow can return bad pointers causing
203 segfaults in applications
204 [20543] libc: Please move from .gnu.linkonce to comdat
205 [22489] network: gcc warns about implicit convertion in
206 ICMP6_FILTER_SETPASS with -Wsign-conversion
207 [22525] localedata: or_IN LC_COLLATE does not use copy "iso14651_t1"
208 [23294] math: Complex _FloatN functions are redirected to the wrong
209 function with -mlong-double-64
210 [23296] libc: Data race in setting function descriptor during lazy
212 [23668] dynamic-link: ldconfig: Default to the new format for
214 [23819] hurd: hurd: Add C11 thread support
215 [23990] build: test-container error out on failure to exec child.
216 [23991] build: shell-container typo in run_command_array
217 [24638] manual: Error in example of parsing a template string
218 [24654] manual: Wrong declaration of wcschr in libc manual
219 [24943] dynamic-link: Support DT_AUDIT, DT_DEPAUDIT in the dynamic
221 [25051] dynamic-link: aarch64, powerpc64 uses surplus static tls for
222 dynamically loaded dsos
223 [25098] nptl: nptl: ctype classification functions are not AS-Safe
224 [25219] libc: improve out-of-bounds checking with GCC 10 attribute
226 [25262] libc: getcontext/setcontext/swapcontext unnecessarily save and
227 restore EAX, ECX and EDX
228 [25397] dynamic-link: Legacy bitmap doesn't cover jitted code
229 [25414] glob: 'glob' use-after-free bug (CVE-2020-1752)
230 [25420] network: Race condition in resolv_conf.c can result in caching
231 stale configuration forever
232 [25487] math: sinl() stack corruption from crafted input
234 [25506] build: configure: broken detection of STT_GNU_IFUNC when GCC
236 [25523] libc: MIPS/Linux inline syscall template is miscompiled
237 [25620] libc: Signed comparison vulnerability in the ARMv7 memcpy()
239 [25623] libc: test-sysvmsg, test-sysvsem, test-sysvshm fail with 2.31
240 on 32 bit and old kernel
241 [25635] libc: arm: Wrong sysdep order selection for soft-fp
242 [25639] localedata: Some names of days and months wrongly spelt in
244 [25657] libc: sigprocmask() and sigisemptyset() manipulate different
245 amount of sigset_t bytes
246 [25691] stdio: printf: memory leak when printing long multibyte
248 [25715] libc: system() returns wrong errors when posix_spawn fails
249 [25733] malloc: mallopt(M_MXFAST) can set global_max_fast to 0
250 [25734] locale: mbrtowc with Big5-HKSCS fails to reset conversion
251 state for conversions that produce two Unicode code points
252 [25765] nptl: Incorrect futex syscall in __pthread_disable_asynccancel
253 for linux x86_64 leads to livelock
254 [25788] dynamic-link: [i386] -fno-omit-frame-pointer in CFLAGS causes
255 test failures, invalid instruction in ld.so
256 [25790] glob: Typo in tst-fnmatch.input
257 [25810] libc: x32: Incorrect syscall entries with pointer, off_t and
259 [25819] localedata: Update locale data to Unicode 13.0.0
260 [25824] libc: Abnormal function of strnlen in aarch64
261 [25887] dynamic-link: Wasted space in _dl_x86_feature_1[1]
262 [25896] libc: Incorrect prctl
263 [25902] libc: Bad LOADARGS_N
264 [25905] dynamic-link: VSX registers are corrupted during PLT
265 resolution when glibc is built with --disable-multi-arch and --with-
267 [25933] string: Off by one error in __strncmp_avx2 when
268 length=VEC_SIZE*4 and strings are at page boundaries can cause a
270 [25942] nptl: Deadlock on stack_cache_lock between __nptl_setxid and
271 exiting detached thread
272 [25966] libc: Incorrect access of __x86_shared_non_temporal_threshold
274 [25976] nss: internal_end*ent in nss_compat may clobber errno, hiding
276 [25999] nptl: Use-after-free issue in pthread_getaddr_default_np
277 [26073] math: getpayload() has wrong return value
278 [26076] dynamic-link: dlmopen crashes after failing to load
279 dependencies in audit mode
280 [26120] localedata: column width of of some Korean
281 JUNGSEONG/JONGSEONG characters wrong (should be 0)
282 [26128] libc: Incorrect bit_cpu_CLFLUSHOPT
283 [26133] libc: Incorrect need_arch_feature_F16C
284 [26137] libc: strtod() triggers exception FE_INEXACT on reasonable
286 [26149] libc: PKU is usable only if OSPKE is set
287 [26173] libc: powerpc64*: Add @notoc to calls to functions that do not
289 [26208] libc: Incorrect bit_cpu_CLFSH
290 [26210] network: Incorrect use of hidden symbols for global sunrpc
292 [26211] stdio: printf integer overflow calculating allocation size
293 [26214] stdio: printf_fp double free
294 [26215] stdio: printf_fp memory leak
295 [26232] time: FAIL: support/tst-timespec for 32-bit targets
296 [26258] nss: nss_compat should not read input files with mmap
297 [26332] string: Incorrect cache line size load causes memory
305 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
306 enable features from the draft ISO C2X standard. Only some features from
307 this draft standard are supported by the GNU C Library, and as the draft
308 is under active development, the set of features enabled by this macro is
309 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
310 by compiling with "gcc -std=gnu2x".
312 * The <math.h> functions that round their results to a narrower type now
313 have corresponding type-generic macros in <tgmath.h>, as defined in TS
314 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
315 Clarification Request 13 to TS 18661-3.
317 * The function pthread_clockjoin_np has been added, enabling join with a
318 terminated thread with a specific clock. It allows waiting against
319 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
321 * New locale added: mnw_MM (Mon language spoken in Myanmar).
323 * The DNS stub resolver will optionally send the AD (authenticated data) bit
324 in queries if the trust-ad option is set via the options directive in
325 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
326 mode, the AD bit, as provided by the name server, is available to
327 applications which call res_search and related functions. In the default
328 mode, the AD bit is not set in queries, and it is automatically cleared in
329 responses, indicating a lack of DNSSEC validation. (Therefore, the name
330 servers and the network path to them are treated as untrusted.)
332 Deprecated and removed features, and other changes affecting compatibility:
334 * The totalorder and totalordermag functions, and the corresponding
335 functions for other floating-point types, now take pointer arguments to
336 avoid signaling NaNs possibly being converted to quiet NaNs in argument
337 passing. This is in accordance with the resolution of Clarification
338 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
339 floating-point arguments directly will continue to work.
341 * The obsolete function stime is no longer available to newly linked
342 binaries, and its declaration has been removed from <time.h>.
343 Programs that set the system time should use clock_settime instead.
345 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
346 in a future version of glibc. In this release, the header still exists
347 but calling ftime will cause a compiler warning. All programs should use
348 gettimeofday or clock_gettime instead.
350 * The gettimeofday function no longer reports information about a
351 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
352 many years, as it cannot handle the full complexity of the world's
353 timezones, but hitherto we have supported it on a best-effort basis.
354 Changes required to support 64-bit time_t on 32-bit architectures have
355 made this no longer practical.
357 As of this release, callers of gettimeofday with a non-null 'tzp' argument
358 should expect to receive a 'struct timezone' whose tz_minuteswest and
359 tz_dsttime fields are zero. (For efficiency reasons, this does not always
360 happen on a few Linux-based ports. This will be corrected in a future
363 All callers should supply a null pointer for the 'tzp' argument to
364 gettimeofday. For accurate information about the time zone associated
365 with the current time, use the localtime function.
367 gettimeofday itself is obsolescent according to POSIX. We have no plans
368 to remove access to this function, but portable programs should consider
369 using clock_gettime instead.
371 * The settimeofday function can still be used to set a system-wide time
372 zone when the operating system supports it. This is because the Linux
373 kernel reused the API, on some architectures, to describe a system-wide
374 time-zone-like offset between the software clock maintained by the kernel,
375 and the "RTC" clock that keeps time when the system is shut down.
377 However, to reduce the odds of this offset being set by accident,
378 settimeofday can no longer be used to set the time and the offset
379 simultaneously. If both of its two arguments are non-null, the call
380 will fail (setting errno to EINVAL).
382 Callers attempting to set this offset should also be prepared for the call
383 to fail and set errno to ENOSYS; this already happens on the Hurd and on
384 some Linux architectures. The Linux kernel maintainers are discussing a
385 more principled replacement for the reused API. After a replacement
386 becomes available, we will change settimeofday to fail with ENOSYS on all
387 platforms when its 'tzp' argument is not a null pointer.
389 settimeofday itself is obsolescent according to POSIX. Programs that set
390 the system time should use clock_settime and/or the adjtime family of
391 functions instead. We may cease to make settimeofday available to newly
392 linked binaries after there is a replacement for Linux's time-zone-like
395 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
396 the optional CAS instruction is implemented (for instance, LEON processors
397 are still supported, but SuperSPARC processors are not).
399 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
402 * If a lazy binding failure happens during dlopen, during the execution of
403 an ELF constructor, the process is now terminated. Previously, the
404 dynamic loader would return NULL from dlopen, with the lazy binding error
405 captured in a dlerror message. In general, this is unsafe because
406 resetting the stack in an arbitrary function call is not possible.
408 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
409 executable stack unless explicitly configured at build time to require
410 minimum kernel version 4.8 or newer. This is because executing
411 floating-point branches on a non-executable stack on Linux kernels prior to
412 4.8 can lead to application crashes for some MIPS configurations. While
413 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
414 expected to enable non-executable stack by default with PT_GNU_STACK by
415 default and is thus likely to trigger a crash on older kernels.
417 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
418 non-executable stack while dropping support for older kernels.
420 * System call wrappers for time system calls now use the new time64 system
421 calls when available. On 32-bit targets, these wrappers attempt to call
422 the new system calls first and fall back to the older 32-bit time system
423 calls if they are not present. This may cause issues in environments
424 that cannot handle unsupported system calls gracefully by returning
425 -ENOSYS. Seccomp sandboxes are affected by this issue.
427 Changes to build and runtime requirements:
429 * It is no longer necessary to have recent Linux kernel headers to build
430 working (non-stub) system call wrappers on all architectures except 64-bit
431 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
433 * The ChangeLog file is no longer present in the toplevel directory of the
434 source tree. ChangeLog files are located in the ChangeLog.old directory as
435 ChangeLog.N where the highest N has the latest entries.
437 Security related changes:
439 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
440 out-of-bounds write when executed in a signal frame context.
442 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
443 environment variable during program execution after a security
444 transition, allowing local attackers to restrict the possible mapping
445 addresses for loaded libraries and thus bypass ASLR for a setuid
446 program. Reported by Marcin Kościelnicki.
448 The following bugs are resolved with this release:
450 [12031] localedata: iconv -t ascii//translit with Greek characters
451 [15813] libc: Multiple issues in __gen_tempname
452 [17726] libc: [arm, sparc] profil_counter should be compat symbol
453 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
454 [19767] libc: vdso is not used with static linking
455 [19903] hurd: Shared mappings not being inherited by children processes
456 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
457 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
459 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
460 Symbols-A/B Unicode blocks
461 [23518] libc: Eliminate __libc_utmp_jump_table
462 [24026] malloc: malloc_info() returns wrong numbers
463 [24054] localedata: Many locales are missing date_fmt
464 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
465 [24304] dynamic-link: Lazy binding failure during ELF
466 constructors/destructors is not fatal
467 [24376] libc: RISC-V symbol size confusion with _start
468 [24682] localedata: zh_CN first weekday should be Monday per GB/T
470 [24824] libc: test-in-container does not install charmap files compatible
472 [24844] regex: regex bad pointer / leakage if malloc fails
473 [24867] malloc: Unintended malloc_info formatting changes
474 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
475 [24880] libc: login: utmp implementation uses struct flock with fcntl64
476 [24882] libc: login: pututline uses potentially outdated cache
477 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
478 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
480 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
482 [24930] dynamic-link: dlopen of PIE executable can result in
483 _dl_allocate_tls_init assertion failure
484 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
485 (stringop-overflow error)
486 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
487 functions other can lead to crashes
488 [24967] libc: jemalloc static linking causes runtime failure
489 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
491 [25035] libc: sbrk() failure handled poorly in tunables_strdup
492 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
493 [25097] libc: new -Warray-bounds with GCC 10
494 [25112] dynamic-link: dlopen must not make new objects accessible when it
495 still can fail with an error
496 [25139] localedata: Please add the new mnw_MM locale
497 [25149] regex: Array bounds violation in proceed_next_node
498 [25157] dynamic-link: Audit cookie for the dynamic loader is not
499 initialized correctly
500 [25189] libc: glibc's __glibc_has_include causes issues with clang
502 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
504 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
505 binaries (CVE-2019-19126)
506 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
508 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
510 [25232] string: <string.h> does not enable const correctness for strchr et
512 [25233] localedata: Consider "." as the thousands separator for sl_SI
514 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
515 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
516 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
518 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
519 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
521 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
522 (dl_initfirst) link map pointer
523 [25401] malloc: pvalloc must not have __attribute_alloc_size__
524 [25423] libc: Array overflow in backtrace on powerpc
525 [25425] network: Missing call to __resolv_context_put in
526 getaddrinfo.c:gethosts
533 * Unicode 12.1.0 Support: Character encoding, character type info, and
534 transliteration tables are all updated to Unicode 12.1.0, using
535 generator scripts contributed by Mike FABIAN (Red Hat).
537 * The dynamic linker accepts the --preload argument to preload shared
538 objects, in addition to the LD_PRELOAD environment variable.
540 * The twalk_r function has been added. It is similar to the existing
541 twalk function, but it passes an additional caller-supplied argument
542 to the callback function.
544 * On Linux, the getdents64, gettid, and tgkill functions have been added.
546 * Minguo (Republic of China) calendar support has been added as an
547 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
550 * The entry for the new Japanese era has been added for ja_JP locale.
552 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
553 pvalloc, memalign, and posix_memalign fail now with total object size
554 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
555 pointer subtraction within the allocated object, where results might
556 overflow the ptrdiff_t type.
558 * The dynamic linker no longer refuses to load objects which reference
559 versioned symbols whose implementation has moved to a different soname
560 since the object has been linked. The old error message, symbol
561 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
562 link time reference, is gone.
564 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
565 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
566 functions. These behave similarly to their "timed" equivalents, but also
567 accept a clockid_t parameter to determine which clock their timeout should
568 be measured against. All functions allow waiting against CLOCK_MONOTONIC
569 and CLOCK_REALTIME. The decision of which clock to be used is made at the
570 time of the wait (unlike with pthread_condattr_setclock, which requires
571 the clock choice at initialization time).
573 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
574 work, new resolvers can use a second argument which can be extended in
575 the future, currently it contains the AT_HWCAP2 value.
577 Deprecated and removed features, and other changes affecting compatibility:
579 * The copy_file_range function fails with ENOSYS if the kernel does not
580 support the system call of the same name. Previously, user space
581 emulation was performed, but its behavior did not match the kernel
582 behavior, which was deemed too confusing. Applications which use the
583 copy_file_range function can no longer rely on glibc to provide a fallback
584 on kernels that do not support the copy_file_range system call, and if
585 this function returns ENOSYS, they will need to use their own fallback.
586 Support for copy_file_range for most architectures was added in version
587 4.5 of the mainline Linux kernel.
589 * The functions clock_gettime, clock_getres, clock_settime,
590 clock_getcpuclockid, clock_nanosleep were removed from the librt library
591 for new applications (on architectures which had them). Instead, the
592 definitions in libc will be used automatically, which have been available
595 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
596 and <sys/stropts.h> have been removed.
598 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
599 resolver flag (deprecated in glibc 2.25) have been removed.
601 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
602 resolver have been removed from <resolv.h>.
604 * With --enable-bind-now, installed programs are now linked with the
607 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
608 configurations) has been removed, following the deprecation of this
609 subarchitecture in version 8 of GCC, and its removal in version 9.
611 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
612 header have been removed.
614 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
615 deprecated and will be removed from a future version of glibc.
616 Application should directly access /proc instead. For obtaining random
617 bits, the getentropy function can be used.
619 Changes to build and runtime requirements:
621 * GCC 6.2 or later is required to build the GNU C Library.
623 Older GCC versions and non-GNU compilers are still supported when
624 compiling programs that use the GNU C Library.
626 Security related changes:
628 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
629 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
630 has undefined behavior. On x32, the size_t argument may be passed
631 in the lower 32 bits of the 64-bit RDX register with non-zero upper
632 32 bits. When it happened with the sign bit of RDX register set,
633 memcmp gave the wrong result since it treated the size argument as
634 zero. Reported by H.J. Lu.
636 CVE-2019-9169: Attempted case-insensitive regular-expression match
637 via proceed_next_node in posix/regexec.c leads to heap-based buffer
638 over-read. Reported by Hongxu Chen.
640 The following bugs are resolved with this release:
642 [2872] locale: Transliteration Cyrillic -> ASCII fails
643 [6399] libc: gettid() should have a wrapper
644 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
645 [16976] glob: fnmatch unbounded stack VLA for collating symbols
646 [17396] localedata: globbing for locale by [[.collating-element.]]
647 [18035] dynamic-link: pldd does no longer work, enters infinite loop
648 [18465] malloc: memusagestat is built using system C library
649 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
650 invalid input drops valid char
651 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
652 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
653 [21897] localedata: Afar locales: Fix mon, abmon, and abday
654 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
655 [23352] malloc: __malloc_check_init still defined in public header
657 [23403] nptl: Wrong alignment of TLS variables
658 [23501] libc: nftw() doesn't return dangling symlink's inode
659 [23733] malloc: Check the count before calling tcache_get()
660 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
662 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
663 [23844] nptl: pthread_rwlock_trywrlock results in hang
664 [23983] argparse: Missing compat versions of argp_failure and argp_error
665 for long double = double
666 [23984] libc: Missing compat versions of err.h and error.h functions for
668 [23996] localedata: Dutch salutations
669 [24040] libc: riscv64: unterminated call chain in __thread_start
670 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
672 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
673 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
675 [24114] regex: regexec buffer read overrun in "grep -i
676 '\(\(\)*.\)*\(\)\(\)\1'"
677 [24122] libc: Segfaults if 0 returned from la_version
678 [24153] stdio: Some input functions do not react to stdin assignment
679 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
680 RDX is set) (CVE-2019-7309)
681 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
682 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
683 not the default "nor"
684 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
685 false positives, change to modern flexible array
686 [24180] nptl: pthread_mutex_trylock does not use the correct order of
687 instructions while maintaining the robust mutex list due to missing
689 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
690 unnecessary librt dependencies
691 [24200] localedata: Revert first_weekday removal in en_IE locale
692 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
693 [24215] nptl: pthread_timedjoin_np should be a cancellation point
694 [24216] malloc: Check for large bin list corruption when inserting
696 [24228] stdio: old x86 applications that use legacy libio crash on exit
697 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
699 [24293] localedata: Missing Minguo calendar support for TW locales
700 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
702 [24307] localedata: Update locale data to Unicode 12.0.0
703 [24323] dynamic-link: dlopen should not be able open PIE objects
704 [24335] build: "Obsolete types detected" with Linux 5.0 headers
705 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
707 [24370] localedata: Add lang_name for tt_RU locale
708 [24372] locale: Binary locale files are not architecture independent
709 [24394] time: strptime %Ey mis-parses final year of era
710 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
712 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
714 [24531] malloc: Malloc tunables give tcache assertion failures
715 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
717 [24535] localedata: Update locale data to Unicode 12.1.0
718 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
719 kernels and break testing
720 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
721 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
722 [-Werror=format-overflow=]
723 [24570] libc: alpha: compat msgctl uses __IPC_64
724 [24584] locale: Data race in __wcsmbs_clone_conv
725 [24588] stdio: Remove codecvt vtables from libio
726 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
728 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
729 [24632] stdio: Old binaries which use freopen with default stdio handles
731 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
733 [24652] localedata: szl_PL spelling correction
734 [24695] nss: nss_db: calling getpwent after endpwent crashes
735 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
736 in /etc/nsswitch.conf
737 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
738 [24740] libc: getdents64 type confusion
739 [24741] dynamic-link: ld.so should not require that a versioned symbol is
740 always implemented in the same library
741 [24744] libc: Remove copy_file_range emulation
742 [24757] malloc: memusagestat is linked against system libpthread
743 [24794] libc: Partial test suite run builds corrupt test-in-container
751 * The getcpu wrapper function has been added, which returns the currently
752 used CPU and NUMA node. This function is Linux-specific.
754 * A new convenience target has been added for distribution maintainers
755 to build and install all locales as directories with files. The new
756 target is run by issuing the following command in your build tree:
757 'make localedata/install-locale-files', with an optional DESTDIR
758 to set the install root if you wish to install into a non-default
761 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
763 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
764 for _GNU_SOURCE, to match BSD environments.
766 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
767 indicates that it will abort the transaction prior to entering the kernel
768 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
769 suspended, and this caused some undefined side-effects issues by aborting
770 transactions manually. Glibc avoided it by abort transactions manually on
771 each syscall, but it lead to performance issues on newer kernels where the
772 HTM state is saved and restore lazily (the state being saved even when the
773 process actually does not use HTM).
775 * The functions posix_spawn_file_actions_addchdir_np and
776 posix_spawn_file_actions_addfchdir_np have been added, enabling
777 posix_spawn and posix_spawnp to run the new process in a different
778 directory. These functions are GNU extensions. The function
779 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
782 * The popen and system do not run atfork handlers anymore (BZ#17490).
783 Although it is a possible POSIX violation, the POSIX rationale in
784 pthread_atfork documentation regarding atfork handlers is to handle
785 inconsistent mutex state after a fork call in a multi-threaded process.
786 In both popen and system there is no direct access to user-defined mutexes.
788 * Support for the C-SKY ABIV2 running on Linux has been added. This port
789 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
791 - C-SKY ABIV2 soft-float little-endian
792 - C-SKY ABIV2 hard-float little-endian
794 * strftime's default formatting of a locale's alternative year (%Ey)
795 has been changed to zero-pad the year to a minimum of two digits,
796 like "%y". This improves the display of Japanese era years during
797 the first nine years of a new era, and is expected to be harmless
798 for all other locales (only Japanese locales regularly have
799 alternative year numbers less than 10). Zero-padding can be
800 overridden with the '_' or '-' flags (which are GNU extensions).
802 * As a GNU extension, the '_' and '-' flags can now be applied to
803 "%EY" to control how the year number is formatted; they have the
804 same effect that they would on "%Ey".
806 Deprecated and removed features, and other changes affecting compatibility:
808 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
809 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
811 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
812 in <sys/procfs.h>, has been corrected to match the type actually used by
813 the Linux kernel. This affects the size and layout of that structure on
814 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
816 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
817 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
818 defined in <sys/procfs.h>, has been corrected to match the type actually
819 used by the Linux kernel. This affects the size and layout of those
822 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
823 meant to scan a string and allocate space for it with malloc, is now
824 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
825 defined. This extension conflicts with C99's use of '%a' to scan a
826 hexadecimal floating-point number, which is now available to programs
827 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
829 POSIX.1-2008 includes the feature of allocating a buffer for string input
830 with malloc, using the modifier letter 'm' instead. Programs using
831 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
832 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
833 C99 '%a' no longer need to avoid _GNU_SOURCE.
835 GCC's -Wformat warnings can detect most uses of this extension, as long
836 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
837 __attribute__ ((format (scanf, ...))).
839 Changes to build and runtime requirements:
841 * Python 3.4 or later is required to build the GNU C Library.
843 * On most architectures, GCC 5 or later is required to build the GNU C
844 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
846 Older GCC versions and non-GNU compilers are still supported when
847 compiling programs that use the GNU C Library.
849 Security related changes:
851 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
852 denial of service due to resource exhaustion when processing getaddrinfo
853 calls with crafted host names. Reported by Guido Vranken.
855 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
856 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
857 happened, accessing the 32-bit size_t value as the full 64-bit register
858 in the assembly string/memory functions would cause a buffer overflow.
861 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
862 addresses with arbitrary trailing characters, potentially leading to data
863 or command injection issues in applications.
865 The following bugs are resolved with this release:
867 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
868 [10496] localedata: 12h time representation in multiple locales faulty
869 [10797] localedata: it_IT locale numeric does not have a separator for
871 [11319] libc: dprintf doesn't handle errors properly
872 [16346] time: mktime: potentially unsafe use of localtime_offset
873 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
875 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
876 posix_spawn_file_actions_addfchdir_np
877 [17426] localedata: Indian locales: set the correct date format
878 [17490] stdio: popen should not invoke atfork handlers
879 [17783] libc: TIOCSER_TEMT conditions inconsistent
880 [18040] regex: use-after-free in regexec/get_subexp
881 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
882 [20018] network: getaddrinfo should reject IP addresses with trailing
883 characters (CVE-2016-10739)
884 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
885 [20271] libc: Missing "\n" in __libc_fatal calls
886 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
887 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
888 pointer argument is non-NULL
889 [21037] stdio: open_memstream and freopen
890 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
891 [21716] time: Crash in glibc's mktime in low-memory situations
892 [22834] stdio: Subprocess forked by popen may crash in Linux when
893 multithreads call popen
894 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
895 and pthread_create fails.
896 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
897 [23125] libc: riscv64: endless loop when throwing an exception from a
899 [23275] nptl: Race in pthread_mutex_lock while promoting to
900 PTHREAD_MUTEX_ELISION_NP.
901 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
903 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
905 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
907 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
908 [23509] dynamic-link: CET enabled glibc is incompatible with the older
910 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
911 [23521] nss: get_next_alias nss_files file stream leak
912 [23538] nptl: Hang in pthread_cond_broadcast
913 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
914 [23578] regex: Invalid memory access if regex pattern contains NUL byte
915 [23579] libc: Errors misreported in preadv2
916 [23597] build: support/test-container.c doesn't work with different
918 [23603] time: mktime signed integer overflow on large timestamps
919 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
920 [23614] libc: powerpc: missing CFI register information in __mpn_*
922 [23637] string: Generic strstr/strcasestr fails with huge needles
923 [23640] libc: no way to easily clear FD_CLOEXEC in
924 posix_spawn_file_actions_adddup2()
925 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
927 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
929 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
930 [23689] libc: Bug in documentation for rusage.ru_ixrss in
931 bits/types/struct_rusage.h
932 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
934 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
936 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
937 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
938 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
940 [23724] localedata: Albanian date formats are incorrect
941 [23735] math: libnldbl_nonshared.a references internal libm symbols
942 [23740] localedata: kl_GL: Month names and date formats need update
943 [23744] regex: regex refactorings to remove BE, avoid duplication
944 [23745] time: mktime fix for Gnulib + coreutils
945 [23758] time: Improve the width of alternate representation for year in
947 [23783] libc: [mips] Missing CMSPAR bits/termios.h
948 [23789] time: mktime does not set errno on failure
949 [23791] localedata: Wrong monetary format for ca_ES locale
950 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
951 [23794] locale: c16rtomb does not handle surrogate pairs
952 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
953 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
954 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
955 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
956 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
957 [23862] libc: [sh] missing kernel-features.h undefines
958 [23864] libc: [riscv] missing kernel-features.h undefines
959 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
960 [23907] malloc: Incorrect double-free malloc tcache check disregards
962 [23913] libc: off-by-one in function maybe_script_execute in
963 sysdeps/posix/spawni.c
964 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
965 [23923] locale: Add --no-hard-links option to localedef
966 [23927] network: Linux if_nametoindex() does not close descriptor
968 [23961] math: powf can overflow to inf without setting errno in non-
969 nearest rounding mode
970 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
971 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
972 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
973 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
974 [24011] localedata: Fixed small type in comment for locale bs_BA
975 [24018] libc: gettext() may return NULL
976 [24022] build: riscv build failure with Linux kernel 4.20-rc7
977 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
978 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
980 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
981 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
983 [24046] localedata: en_US locale doesn't define date_fmt
984 [24063] manual: @var{errno} should be @code{errno}
985 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
986 [24088] libc: VSCR field is not being correctly read in ucontext_t on
988 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
990 [24097] string: Can't use 64-bit register for size_t in assembly codes for
992 [24110] hurd: SS_DISABLE never set in stack_t value returned by
994 [24112] network: Do not send DNS queries for non-host names (where all
995 answers will be rejected)
996 [24130] libc: alpha __remqu corrupts $f3 register
1003 * The localization data for ISO 14651 is updated to match the 2016
1004 Edition 4 release of the standard, this matches data provided by
1005 Unicode 9.0.0. This update introduces significant improvements to the
1006 collation of Unicode characters. This release deviates slightly from
1007 the standard in that the collation element ordering for lowercase and
1008 uppercase LATIN script characters is adjusted to ensure that regular
1009 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
1010 is not matched by [a-z]. With the update many locales have been
1011 updated to take advantage of the new collation information. The new
1012 collation information has increased the size of the compiled locale
1013 archive or binary locales.
1015 * The GNU C Library can now be compiled with support for Intel CET, AKA
1016 Intel Control-flow Enforcement Technology. When the library is built
1017 with --enable-cet, the resulting glibc is protected with indirect
1018 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
1019 compatible with all existing executables and shared libraries. This
1020 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
1021 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
1022 capable of multi-byte NOPs, like x86-64 processors as well as Intel
1023 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
1024 x86_64 and x32 on non-CET processors. --enable-cet has been tested
1025 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
1028 * The GNU C Library now has correct support for ABSOLUTE symbols
1029 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
1030 relocated incorrectly or in some cases discarded. The GNU linker can
1031 make use of the newer semantics, but it must communicate it to the
1032 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
1033 field) to indicate such support is required.
1035 * Unicode 11.0.0 Support: Character encoding, character type info, and
1036 transliteration tables are all updated to Unicode 11.0.0, using
1037 generator scripts contributed by Mike FABIAN (Red Hat).
1039 * <math.h> functions that round their results to a narrower type are added
1040 from TS 18661-1:2014 and TS 18661-3:2015:
1042 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
1043 fMxaddfNx functions.
1045 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
1046 fMxsubfNx functions.
1048 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
1049 fMxmulfNx functions.
1051 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
1052 fMxdivfNx functions.
1054 * Two grammatical forms of month names are now supported for the following
1055 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
1056 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
1057 support two grammatical forms in abbreviated month names: Catalan, Greek,
1060 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
1061 include the support for two grammatical forms of month names.
1063 * Building and running on GNU/Hurd systems now works without out-of-tree
1066 * The renameat2 function has been added, a variant of the renameat function
1067 which has a flags argument. If the flags are zero, the renameat2 function
1068 acts like renameat. If the flag is not zero and there is no kernel
1069 support for renameat2, the function will fail with an errno value of
1070 EINVAL. This is different from the existing gnulib function renameatu,
1071 which performs a plain rename operation in case of a RENAME_NOREPLACE
1072 flags and a non-existing destination (and therefore has a race condition
1073 that can clobber the destination inadvertently).
1075 * The statx function has been added, a variant of the fstatat64
1076 function with an additional flags argument. If there is no direct
1077 kernel support for statx, glibc provides basic stat support based on
1078 the fstatat64 function.
1080 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
1081 library if installed. libidn2 version 2.0.5 or later is recommended. If
1082 libidn2 is not available, internationalized domain names are not encoded
1083 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
1084 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
1085 with an encoding error.) Flags which used to change the IDN encoding and
1086 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
1087 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
1088 deprecated. They no longer have any effect.
1090 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
1091 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
1092 range of ELF gABI expressions including such constructs as
1093 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
1094 have been further restricted, and where in the past a dynamic string
1095 token sequence may have been interpreted as a literal string it will
1096 now cause a load failure. These load failures were always considered
1097 unspecified behaviour from the perspective of the dynamic loader, and
1098 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
1099 results in a load failure now.
1101 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
1102 implementation includes all the standard functions provided by
1105 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
1106 thrd_detach, thrd_exit, and thrd_join for thread management.
1108 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
1109 mtx_destroy for mutual exclusion.
1111 - call_once for function call synchronization.
1113 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
1114 cnd_wait for conditional variables.
1116 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
1118 Application developers must link against libpthread to use ISO C threads.
1120 Deprecated and removed features, and other changes affecting compatibility:
1122 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
1123 installed. Software that was using either header should be updated to
1124 use standard <stdio.h> interfaces instead.
1126 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
1127 This was never required by the C standard, and the macros just expanded
1128 to call alternative names for the same functions. If you hoped getc and
1129 putc would provide performance improvements over fgetc and fputc, instead
1130 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
1131 necessary, flockfile and funlockfile.
1133 * All stdio functions now treat end-of-file as a sticky condition. If you
1134 read from a file until EOF, and then the file is enlarged by another
1135 process, you must call clearerr or another function with the same effect
1136 (e.g. fseek, rewind) before you can read the additional data. This
1137 corrects a longstanding C99 conformance bug. It is most likely to affect
1138 programs that use stdio to read interactive input from a terminal.
1141 * The macros 'major', 'minor', and 'makedev' are now only available from
1142 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
1143 headers that happen to include <sys/types.h>. These macros are rarely
1144 used, not part of POSIX nor XSI, and their names frequently collide with
1145 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
1146 further explanation.
1148 <sys/sysmacros.h> is a GNU extension. Portable programs that require
1149 these macros should first include <sys/types.h>, and then include
1150 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
1152 * The tilegx*-*-linux-gnu configurations are no longer supported.
1154 * The obsolete function ustat is no longer available to newly linked
1155 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
1156 function has been deprecated in favor of fstatfs and statfs.
1158 * The obsolete function nfsservctl is no longer available to newly linked
1159 binaries. This function was specific to systems using the Linux kernel
1160 and could not usefully be used with the GNU C Library on systems with
1161 version 3.1 or later of the Linux kernel.
1163 * The obsolete function name llseek is no longer available to newly linked
1164 binaries. This function was specific to systems using the Linux kernel
1165 and was not declared in a header. Programs should use the lseek64 name
1166 for this function instead.
1168 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
1169 getaddrinfo and getnameinfo functions have been deprecated. The behavior
1170 previously selected by them is now always enabled.
1172 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
1173 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
1174 restriction (rejecting '_' in host names, among other things) has been
1175 removed, for increased compatibility with non-IDN name resolution.
1177 * The fcntl function now have a Long File Support variant named fcntl64. It
1178 is added to fix some Linux Open File Description (OFD) locks usage on non
1179 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
1180 fcntl and LFS support is handled transparently. Also for Linux, the OFD
1181 locks act as a cancellation entrypoint.
1183 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
1184 ecb_crypt, and des_setparity are no longer available to newly linked
1185 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
1186 longer installed. These functions encrypted and decrypted data with the
1187 DES block cipher, which is no longer considered secure. Software that
1188 still uses these functions should switch to a modern cryptography library,
1191 * Reflecting the removal of the encrypt and setkey functions above, the
1192 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
1193 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1196 * The obsolete function fcrypt is no longer available to newly linked
1197 binaries. It was just another name for the standard function crypt,
1198 and it has not appeared in any header file in many years.
1200 * We have tentative plans to hand off maintenance of the passphrase-hashing
1201 library, libcrypt, to a separate development project that will, we hope,
1202 keep up better with new passphrase-hashing algorithms. We will continue
1203 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1204 'crypt_r' should not need to change at all; however, distributions will
1205 need to install <crypt.h> and libcrypt from a separate project.
1207 In this release, if the configure option --disable-crypt is used, glibc
1208 will not install <crypt.h> or libcrypt, making room for the separate
1209 project's versions of these files. The plan is to make this the default
1210 behavior in a future release.
1212 Changes to build and runtime requirements:
1214 GNU make 4.0 or later is now required to build glibc.
1216 Security related changes:
1218 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1219 been fixed by removing the glibc-internal IDNA implementation and using
1220 the system-provided libidn2 library instead. Originally reported by Hanno
1221 Böck and Christian Weisgerber.
1223 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1224 architecture could corrupt memory. Reported by Max Horn.
1226 CVE-2018-11236: Very long pathname arguments to realpath function could
1227 result in an integer overflow and buffer overflow. Reported by Alexey
1230 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1231 architecture could write beyond the target buffer, resulting in a buffer
1232 overflow. Reported by Andreas Schwab.
1234 The following bugs are resolved with this release:
1236 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1237 [6889] manual: 'PWD' mentioned but not specified
1238 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1239 when __WORDSIZE != 64
1240 [13762] regex: re_search etc. should return -2 on memory exhaustion
1241 [13888] build: /tmp usage during testing
1242 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1243 [14092] nptl: Support C11 threads
1244 [14095] localedata: Review / update collation data from Unicode / ISO
1246 [14508] libc: -Wformat warnings
1247 [14553] libc: Namespace pollution loff_t in sys/types.h
1248 [14890] libc: Make NT_PRFPREG canonical.
1249 [15105] libc: Extra PLT references with -Os
1250 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1252 [16335] manual: Feature test macro documentation incomplete and out of
1254 [16552] libc: Unify umount implementations in terms of umount2
1255 [17082] libc: htons et al.: statement-expressions prevent use on global
1256 scope with -O1 and higher
1257 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1258 [17438] localedata: pt_BR: wrong d_fmt delimiter
1259 [17662] libc: please implement binding for the new renameat2 syscall
1260 [17721] libc: __restrict defined as /* Ignore */ even in c11
1261 [17979] libc: inconsistency between uchar.h and stdint.h
1262 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1263 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1264 horrible machine code)
1265 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1267 [18471] libc: llseek should be a compat symbol
1268 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1270 [18991] nss: nss_files skips large entry in database
1271 [19239] libc: Including stdlib.h ends up with macros major and minor being
1273 [19463] libc: linknamespace failures when compiled with -Os
1274 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1275 [19527] locale: Normalized charset name not recognized by setlocale
1276 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1277 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1279 [19728] network: out of bounds stack read in libidn function
1280 idna_to_ascii_4i (CVE-2016-6261)
1281 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1282 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1283 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1285 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1286 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1287 [20419] dynamic-link: files with large allocated notes crash in
1289 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1290 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1291 [20980] manual: CFLAGS environment variable replaces vital options
1292 [21163] regex: Assertion failure in pop_fail_stack when executing a
1293 malformed regexp (CVE-2015-8985)
1294 [21234] manual: use of CFLAGS makes glibc detect no optimization
1295 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1296 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1297 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1298 [21508] locale: intl/tst-gettext failure with latest msgfmt
1299 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1300 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1301 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1303 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1305 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1306 [22247] network: Integer overflow in the decode_digit function in
1307 puny_decode.c in libidn (CVE-2017-14062)
1308 [22342] nscd: NSCD not properly caching netgroup
1309 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1310 [22550] localedata: es_ES locale (and other es_* locales): collation
1311 should treat ñ as a primary different character, sync the collation
1312 for Spanish with CLDR
1313 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1314 by gcc configured with --enable-default-pie
1315 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1316 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1317 crossing 2GB threshold (CVE-2017-18269)
1318 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1320 [22735] time: Misleading typo in time.h source comment regarding
1322 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1323 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1324 `__assert_perror_fail ()' to `__assert_fail_base ()'
1325 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1327 [22786] libc: Stack buffer overflow in realpath() if input size is close
1328 to SSIZE_MAX (CVE-2018-11236)
1329 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1330 through an absolute DT_NEEDED path
1331 [22792] build: tcb-offsets.h dependency dropped
1332 [22797] libc: pkey_get() uses non-reserved name of argument
1333 [22807] libc: PTRACE_* constants missing for powerpc
1334 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1335 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1336 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1337 [22848] localedata: ca_ES: update date definitions from CLDR
1338 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1339 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1340 [22896] localedata: Update locale data for an_ES
1341 [22902] math: float128 test failures with GCC 8
1342 [22918] libc: multiple common of `__nss_shadow_database'
1343 [22919] libc: sparc32: backtrace yields infinite backtrace with
1345 [22926] libc: FTBFS on powerpcspe
1346 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1348 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1349 [22947] libc: FAIL: misc/tst-preadvwritev2
1350 [22963] localedata: cs_CZ: Add alternative month names
1351 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1352 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1353 [22998] dynamic-link: execstack tests are disabled when SELinux is
1355 [23005] network: Crash in __res_context_send after memory allocation
1357 [23007] math: strtod cannot handle -nan
1358 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1359 [23036] regex: regex equivalence class regression
1360 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1361 [23069] libc: sigaction broken on riscv64-linux-gnu
1362 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1363 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1364 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1365 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1366 and libc build with -Os)
1367 [23140] localedata: More languages need two forms of month names
1368 [23145] libc: _init/_fini aren't marked as hidden
1369 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1370 [23171] math: C++ iseqsig for long double converts arguments to double
1371 [23178] nscd: sudo will fail when it is run in concurrent with commands
1372 that changes /etc/passwd
1373 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1375 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1376 [23208] localedata: New locale - Lower Sorbian (dsb)
1377 [23233] regex: Memory leak in build_charclass_op function in file
1379 [23236] stdio: Harden function pointers in _IO_str_fields
1380 [23250] nptl: Offset of __private_ss differs from GCC
1381 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1382 -mtune=generic -mfpmath=sse
1383 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1385 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1386 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1388 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1389 [23277] math: nan function should not have const attribute
1390 [23279] math: scanf and strtod wrong for some hex floating-point
1391 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1393 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1394 [23303] build: undefined reference to symbol
1395 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1396 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1398 [23313] stdio: libio vtables validation and standard file object
1400 [23329] libc: The __libc_freeres infrastructure is not properly run across
1402 [23349] libc: Various glibc headers no longer compatible with
1404 [23351] malloc: Remove unused code related to heap dumps and malloc
1406 [23363] stdio: stdio-common/tst-printf.c has non-free license
1407 [23396] regex: Regex equivalence regression in single-byte locales
1408 [23422] localedata: oc_FR: More updates of locale data
1409 [23442] build: New warning with GCC 8
1410 [23448] libc: Out of bounds access in IBM-1390 converter
1411 [23456] libc: Wrong index_cpu_LZCNT
1412 [23458] build: tst-get-cpu-features-static isn't added to tests
1413 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1415 [23467] dynamic-link: x86/CET: A property note parser bug
1422 * The GNU C Library can now be compiled with support for building static
1423 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1424 executables are like static executables but can be loaded at any address
1425 and provide additional security hardening benefits at the cost of some
1426 memory and performance. When the library is built with --enable-static-pie
1427 the resulting libc.a is usable with GCC 8 and above to create static PIE
1428 executables using the GCC option '-static-pie'. This feature is currently
1429 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1430 aarch64 with binutils 2.30 or later.
1432 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1433 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1436 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1438 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1440 * In order to support faster and safer process termination the malloc API
1441 family of functions will no longer print a failure address and stack
1442 backtrace after detecting heap corruption. The goal is to minimize the
1443 amount of work done after corruption is detected and to avoid potential
1444 security issues in continued process execution. Reducing shutdown time
1445 leads to lower overall process restart latency, so there is benefit both
1446 from a security and performance perspective.
1448 * The abort function terminates the process immediately, without flushing
1449 stdio streams. Previous glibc versions used to flush streams, resulting
1450 in deadlocks and further data corruption. This change also affects
1451 process aborts as the result of assertion failures.
1453 * On platforms where long double has the IEEE binary128 format (aarch64,
1454 alpha, mips64, riscv, s390 and sparc), the math library now implements
1455 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1456 These are the same interfaces added in version 2.26 for some platforms where
1457 this format is supported but is not the format of long double.
1459 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1460 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1461 implements interfaces for that type, as defined by ISO/IEC TS
1462 18661-3:2015. These are corresponding interfaces to those supported for
1465 * The math library now implements interfaces for the _Float32, _Float64 and
1466 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1467 corresponding interfaces to those supported for _Float128.
1469 * glibc now implements the memfd_create and mlock2 functions on Linux.
1471 * Support for memory protection keys was added. The <sys/mman.h> header now
1472 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1475 * The copy_file_range function was added.
1477 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1479 * The ldconfig utility now processes `include' directives using the C/POSIX
1480 collation ordering. Previous glibc versions used locale-specific
1481 ordering, the change might break systems that relied on that.
1483 * Support for two grammatical forms of month names has been added.
1484 In a call to strftime, the "%B" and "%b" format specifiers will now
1485 produce the grammatical form required when the month is used as part
1486 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1487 required when the month is named by itself. For instance, in Greek
1488 and in many Slavic and Baltic languages, "%B" will produce the month
1489 in genitive case, and "%OB" will produce the month in nominative case.
1491 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1492 are all valid and will all accept any known form of month
1493 name---standalone or complete, abbreviated or full. In a call to
1494 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1495 the strings used by "%B" and "%b", respectively. New query
1496 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1497 used by "%OB" and "%Ob", respectively.
1499 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1500 define the strings for %OB and %Ob, respectively; these have the
1501 same syntax as "mon" and "abmon". These arrays are optional; if they
1502 are not provided then they have the same content as "mon" and "abmon",
1505 These features are provided for locales which define "alt_mon" and/or
1506 "ab_alt_mon" in their locale source data. This release includes such
1507 alternative month name data for the following languages: Belarusian,
1508 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1510 This feature is currently a GNU extension, but it is expected to
1511 be added to the next revision of POSIX, and it is also already
1512 available on some BSD-derived operating systems.
1514 This feature will cause existing statically compiled applications
1515 to fail to load locales and fall back to the builtin C/POSIX locales.
1516 See notes below for other changes affecting compatibility.
1518 * Support for the RISC-V ISA running on Linux has been added. This port
1519 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1520 for the following ISA and ABI pairs:
1526 Deprecated and removed features, and other changes affecting compatibility:
1528 * Statically compiled applications attempting to load locales compiled for the
1529 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1530 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1531 support for two grammatical forms of the month names, also extends the locale
1532 data binary format. Static applications needing locale support must be
1533 recompiled to match the runtime and data they are deployed with. In some
1534 distributions there is an upgrade window where dynamically linked applications
1535 may use a new library but the old locale data and also fall back to the
1536 builtin C/POSIX locales; restarting the application process is sufficient to
1539 * Support for statically linked applications which call dlopen is deprecated
1540 and will be removed in a future version of glibc. Applications which call
1541 dlopen need to be linked dynamically instead.
1543 * Support for old programs which use internal stdio data structures and
1544 functions is deprecated. This includes programs which use the C++ streams
1545 provided by libstdc++ in GCC 2.95. Programs which use the internal
1546 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1547 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1548 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1549 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1550 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1551 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1552 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1553 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1554 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1555 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1556 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1557 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1558 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1559 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1560 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1561 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1562 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1563 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1564 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1565 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1566 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1567 future version of glibc. Unlike other symbol removals, these old
1568 applications will not be supported using compatibility symbols.
1570 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1571 defined by <sys/ptrace.h>.
1573 * libm no longer supports SVID error handling (calling a user-provided
1574 matherr function on error) or the _LIB_VERSION variable to control error
1575 handling. (SVID error handling and the _LIB_VERSION variable still work
1576 for binaries linked against older versions of the GNU C Library.) The
1577 libieee.a library is no longer provided. math.h no longer defines struct
1578 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1579 TLOSS, PLOSS and HUGE.
1581 * The libm functions pow10, pow10f and pow10l are no longer supported for
1582 new programs. Programs should use the standard names exp10, exp10f and
1583 exp10l for these functions instead.
1585 * The mcontext_t type is no longer the same as struct sigcontext. On
1586 platforms where it was previously the same, this changes the C++ name
1587 mangling for interfaces involving this type.
1589 * The add-ons mechanism for building additional packages at the same time as
1590 glibc has been removed. The --enable-add-ons configure option is now
1593 * The --without-fp configure option is now ignored. Whether hardware
1594 floating-point instructions are used is now configured based on whether
1595 the compiler used at configure time (without any options implied by a
1596 --with-cpu= configure option) uses such instructions.
1598 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1599 the specified string can be parsed as a domain name.
1601 * In the malloc_info output, the <heap> element may contain another <aspace>
1602 element, "subheaps", which contains the number of sub-heaps.
1604 * The libresolv function p_secstodate is no longer supported for new
1607 * The tilepro-*-linux-gnu configuration is no longer supported.
1609 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1610 and will be removed in a future release. Software that is still using
1611 either header should be updated to use standard <stdio.h> interfaces
1614 libio.h was originally the header for a set of supported GNU extensions,
1615 but they have not been maintained as such in many years, they are now
1616 standing in the way of improvements to stdio, and we don't think there are
1617 any remaining external users. _G_config.h was never intended for public
1618 use, but predates the bits convention.
1620 Changes to build and runtime requirements:
1622 * bison version 2.7 or later is required to generate code in the 'intl'
1625 Security related changes:
1627 CVE-2009-5064: The ldd script would sometimes run the program under
1628 examination directly, without preventing code execution through the
1629 dynamic linker. (The glibc project disputes that this is a security
1630 vulnerability; only trusted binaries must be examined using the ldd
1633 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1634 suffered from a one-byte overflow during ~ operator processing (either
1635 on the stack or the heap, depending on the length of the user name).
1636 Reported by Tim Rühsen.
1638 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1639 would sometimes fail to free memory allocated during ~ operator
1640 processing, leading to a memory leak and, potentially, to a denial
1643 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1644 without GLOB_NOESCAPE, could write past the end of a buffer while
1645 unescaping user names. Reported by Tim Rühsen.
1647 CVE-2017-17426: The malloc function, when called with an object size near
1648 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1649 instead of NULL. This was a regression introduced with the new malloc
1650 thread cache in glibc 2.26. Reported by Iain Buclaw.
1652 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1653 to the allocation of too much memory. (This is not a security bug per se,
1654 it is mentioned here only because of the CVE assignment.) Reported by
1657 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1658 of the number of search path components. (This is not a security
1659 vulnerability per se because no trust boundary is crossed if the fix for
1660 CVE-2017-1000366 has been applied, but it is mentioned here only because
1661 of the CVE assignment.) Reported by Qualys.
1663 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1664 for AT_SECURE or SUID binaries could be used to load libraries from the
1667 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1668 succeeds without returning an absolute path due to unexpected behaviour
1669 of the Linux kernel getcwd syscall. Reported by halfdog.
1671 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1672 an object size near the value of SIZE_MAX, would return a pointer to a
1673 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1675 CVE-2018-6551: The malloc function, when called with an object size near
1676 the value of SIZE_MAX, would return a pointer to a buffer which is too
1677 small, instead of NULL.
1679 The following bugs are resolved with this release:
1681 [866] glob: glob should match dangling symlinks
1682 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1683 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1685 [5997] math: Very slow execution of sinf function
1686 [10580] localedata: hr_HR: updated locale
1687 [10871] locale: 'mon' array should contain both nominative and genitive
1689 [12349] localedata: eu_ES: incorrect thousands separator
1690 [13605] localedata: shn_MM: new Shan locale
1691 [13805] localedata: ru_RU: currency should use ',' as radix point
1692 [13953] localedata: km_KH: locale update
1693 [13994] localedata: mjw_IN: new locale
1694 [14121] build: make writes .mo files in po directory
1695 [14333] libc: Fix the race between atexit() and exit()
1696 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1697 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1699 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1700 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1701 width Latin characters
1702 [15332] localedata: es_CU: locale update
1703 [15436] stdio: Don't close or flush stdio streams on abort
1704 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1706 [16148] localedata: ca_ES: incorrect thousands separator
1707 [16750] dynamic-link: ldd should not try to execute the binaries
1709 [16777] localedata: pl_PL: incorrect thousands separator in locale
1710 [16905] localedata: hanzi: new collation
1711 [17563] localedata: cmn_TW: add hanzi collation
1712 [17750] localedata: wrong collation order of diacritics in most locales
1713 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1715 [17956] build: Build fails on missing definitions from header file
1716 nss/nss.h when Mozilla NSS is used for cryptography
1717 [18203] libc: realpath() does not handle unreachable paths correctly
1718 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1719 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1720 [18822] libc: Internal functions are called via PLT
1721 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1722 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1723 [19574] libc: glibc should support building static PIE binaries
1724 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1726 [19971] glob: glob: Do not skip entries with zero d_ino values
1727 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1728 [20008] localedata: km_KH: convert to translit_neutral
1729 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1730 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1731 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1732 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1733 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1735 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1736 they're set, wrong errors returned by gaih_inet when lookup functions
1738 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1739 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1741 [20952] localedata: yuw_PG: new locale
1742 [21084] localedata: charmaps/IBM858: new codepage
1743 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1744 [21242] libc: assert gives pedantic warning in old gcc versions
1745 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1746 __regcall calling convention
1747 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1748 [21326] libc: C99 functions are not declared for C++11 and later if
1749 _GNU_SOURCE is not predefined by g++
1750 [21457] libc: sys/ucontext.h namespace
1751 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1752 [21660] math: GCC fails to compile a formula with tgmath.h
1753 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1754 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1755 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1756 [21684] math: tgmath.h handling of complex integers
1757 [21685] math: tgmath.h handling of bit-fields
1758 [21686] math: tgmath.h handling of __int128
1759 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1761 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1763 [21750] localedata: column width of characters incompatible with classical
1765 [21754] malloc: malloc: Perform as little work as possible after heap
1766 consistency check failures
1767 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1768 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1769 [21791] string: Unused XXX_chk_XXX functions in libc.a
1770 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1772 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1774 [21845] localedata: Added new Locale bho_NP
1775 [21853] localedata: Fix abday Which looks same as day in zh_SG
1776 [21854] localedata: Added New Locale en_SC
1777 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1778 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1779 _dl_runtime_resolve_avx_slow
1780 [21885] network: getaddrinfo: gethosts does not release resolver context
1781 on memory allocation failure
1782 [21899] libc: XPG4.2 sigaction namespace
1783 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1785 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1787 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1788 errno value, causing getaddrinfo to fail
1789 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1790 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1791 instead of EAI_NODATA
1792 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1793 constant PTRACE_SEIZE_DEVEL
1794 [21930] math: C-only gcc builtins used in <math.h> isinf
1795 [21932] network: Unpaired __resolv_context_get in generic get*_r
1797 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1798 [21944] libc: sigval namespace
1799 [21951] localedata: Update hanzi collation by stroke
1800 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1801 sysdeps/x86_64/fpu/e_expf.S
1802 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1803 allocation in syscall loops)
1804 [21959] localedata: Fix Country name for xh_ZA
1805 [21960] localedata: Fix abmon for bem_ZM
1806 [21966] math: AVX2 mathvec functions use FMA without checking
1807 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1808 [21971] localedata: Added New Locale for mfe_MU
1809 [21972] libc: assert macro requires operator== (int) for its argument type
1810 [21973] math: [sparc] libm missing sqrtl compat symbol
1811 [21974] libc: Remove __bb_init_func and __bb_exit_func
1812 [21982] string: stratcliff.c: error: assuming signed overflow does not
1814 [21986] stdio: __guess_grouping is called incorrectly
1815 [21987] math: [sparc32] wrong bits/long-double.h installed
1816 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1818 [22022] localedata: Missing country_name for mni_IN
1819 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1821 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1823 [22026] locale: iconv_open: heap overflow on gconv_init failure
1824 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1825 [22035] math: [m68k] bits/math-inline.h macro namespace
1826 [22038] localedata: Fix abbreviated weeks and months for Somali
1827 [22044] localedata: Remove redundant data for Limburgish Language
1828 [22050] malloc: Linking with -lmcheck does not hook
1829 __malloc_initialize_hook correctly
1830 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1831 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1832 [22070] localedata: charmaps/UTF-8: wcwidth for
1833 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1834 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1835 Jungseong and Jongseong) should be 0
1836 [22078] nss: nss_files performance issue in multi mode
1837 [22082] math: bits/math-finite.h exp10 condition
1838 [22086] libc: pcprofiledump incorrect cross-endian condition
1839 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1840 [22095] network: Name server address allocation memory leak in resolv.conf
1842 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1844 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1845 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1847 [22111] malloc: malloc: per thread cache is not returned when thread exits
1848 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1849 [22134] libc: [linux] implement fexecve with execveat
1850 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1852 [22145] libc: ttyname() gives up too early in the face of namespaces
1853 [22146] math: C++ build issue with float128 on x86_64
1854 [22153] nptl: nptl: save error code before process termination
1855 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1856 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1857 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1858 [22165] libc: [hppa] Text relocations in libc.so
1859 [22180] libc: destructor registered via __cxa_atexit is called twice
1860 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1861 symlinks") cause "make" segfaults
1862 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1864 [22207] libc: FAIL: stdlib/test-atexit-race
1865 [22225] math: nearbyint arithmetic moved before feholdexcept
1866 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1867 [22235] math: iscanonical in C++ and float128
1868 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1869 the svid compat wrapper
1870 [22244] math: ynf and yn are wrong without the svid compat wrapper
1871 [22273] libc: Improper assert in Linux posix_spawn implementation
1872 [22284] libc: -pg -pie doesn't work
1873 [22292] locale: localedef exits with error 4 when it should be error 1
1874 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1875 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1877 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1878 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1880 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1881 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1882 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1883 [22322] libc: [mips64] wrong bits/long-double.h installed
1884 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1885 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1887 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1888 [22343] malloc: Integer overflow in posix_memalign
1889 [22347] libc: getrandom() returns the number of bytes that were copied to
1890 the buffer even though the comments say "Return 0 on success and -1 on
1892 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1893 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1895 [22370] dynamic-link: Incorrect note padding check
1896 [22375] libc: malloc returns pointer from tcache_get when should return
1897 NULL (CVE-2017-17426)
1898 [22377] math: iseqsig, float128 and C++
1899 [22382] localedata: Error in tpi_PG locale
1900 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1901 inside the ASCII printable range
1902 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1904 [22403] localedata: Slash needs escaping in some locales
1905 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1906 [22409] network: res_hnok does not accept some host names used on the
1908 [22412] network: res_dnok, res_hnok should perform syntax checks
1909 [22413] network: ns_name_pton ignores syntactically invalid trailing
1911 [22415] stdio: setvbuf can lead to invalid free/segfault
1912 [22432] build: Non-deterministic build
1913 [22439] malloc: malloc_info should compute summary statistics for all sub-
1915 [22442] network: if_nametoindex could report index for the wrong
1916 networking interface
1917 [22446] build: aliasing violation calling readlink in handle_request
1918 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1919 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1920 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1921 __nscd_hash/__nss_hash
1922 [22463] network: p_secstodate overflow handling
1923 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1924 [22478] libc: sigwait can fail with EINTR
1925 [22505] libc: ldconfig processes include directive in locale-specific
1927 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1928 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1929 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1930 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1931 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1932 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1933 same as for Croatian
1934 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1935 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1936 [22577] libc: missing newline after "cannot allocate TLS data structures
1938 [22588] manual: manual/conf.texi: missing underscore in front of
1940 [22593] math: nextafter and nexttoward are declared with const attribute
1941 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1942 [22603] string: ia64 memchr overflows internal pointer check
1943 [22605] libc: SH clone does not set the exit code correctly
1944 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1946 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1947 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1948 modified in case of success
1949 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1950 [22615] manual: manual: ambiguous wording about errno value in case of
1952 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1954 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1955 binaries or if /proc is not mounted (CVE-2017-16997)
1956 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1957 [22630] build: $(no-pie-ldflag) is no longer effective
1958 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1959 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1960 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1961 [22637] nptl: guard size is subtracted from thread stack size instead of
1963 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1964 [22657] localedata: hu_HU: Avoid double space in date
1965 [22660] math: fmax, fmin sNaN handling on alpha
1966 [22664] libc: New warning of GCC8
1967 [22665] math: alpha: ceil and floor raise inexact exceptions
1968 [22666] math: alpha: trunc raise inexact exceptions
1969 [22667] libc: makecontext lacks stack alignment on i386
1970 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1971 [22679] libc: getcwd(3) can succeed without returning an absolute path
1973 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1974 elision and tunables
1975 [22687] math: [powerpc-nofpu] complex long double functions spurious
1977 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1978 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1979 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1981 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1982 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1984 [22701] nis: Incomplete removal of libnsl
1985 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1986 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1987 [22715] dynamic-link: FAIL: elf/tst-audit10
1988 [22719] libc: Backtrace tests fail on hppa
1989 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1990 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1991 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1992 before the first call to crypt_r () in crypt/badsalttest.c
1999 * A per-thread cache has been added to malloc. Access to the cache requires
2000 no locks and therefore significantly accelerates the fast path to allocate
2001 and free small amounts of memory. Refilling an empty cache requires locking
2002 the underlying arena. Performance measurements show significant gains in a
2003 wide variety of user workloads. Workloads were captured using a special
2004 instrumented malloc and analyzed with a malloc simulator. Contributed by
2005 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
2007 * Unicode 10.0.0 Support: Character encoding, character type info, and
2008 transliteration tables are all updated to Unicode 10.0.0, using
2009 generator scripts contributed by Mike FABIAN (Red Hat).
2010 These updates cause user visible changes, especially the changes in
2011 wcwidth for many emoji characters cause problems when emoji sequences
2012 are rendered with pango, see for example:
2013 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
2015 * Collation of Hungarian has been overhauled and is now consistent with "The
2016 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
2019 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
2021 - The GNU C Library will now detect when /etc/resolv.conf has been
2022 modified and reload the changed configuration. The new resolver option
2023 “no-reload” (RES_NORELOAD) disables this behavior.
2025 - The GNU C Library now supports an arbitrary number of search domains
2026 (configured using the “search” directive in /etc/resolv.conf);
2027 previously, there was a hard limit of six domains. For backward
2028 compatibility, applications that directly modify the ‘_res’ global
2029 object are still limited to six search domains.
2031 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
2032 Library will now randomly pick a name server from the configuration as a
2033 starting point. (Previously, the second name server was always used.)
2035 * The tunables feature is now enabled by default. This allows users to tweak
2036 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
2038 * New function reallocarray, which resizes an allocated block (like realloc)
2039 to the product of two sizes, with a guaranteed clean failure upon integer
2040 overflow in the multiplication. Originally from OpenBSD, contributed by
2041 Dennis Wölfing and Rüdiger Sonderfeld.
2043 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
2044 These are extended versions of preadv and pwritev, respectively, taking an
2045 additional flags argument. The set of supported flags depends on the
2046 running kernel; full support currently requires kernel 4.7 or later.
2048 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
2049 create a new session ID for the spawned process. This feature is
2050 scheduled to be added to the next major revision of POSIX; for the time
2051 being, it is available under _GNU_SOURCE.
2053 * errno.h is now safe to use from C-preprocessed assembly language on all
2054 supported operating systems. In this context, it will only define the
2055 Exxxx constants, as preprocessor macros expanding to integer literals.
2057 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
2058 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
2059 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
2060 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
2062 To compile programs that use this feature, the compiler must support
2063 128-bit floating point with the type name _Float128 (as defined by TS
2064 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
2065 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
2066 must be defined to make the new interfaces visible.
2068 The new functions and macros correspond to those present for other
2069 floating-point types (except for a few obsolescent interfaces not
2070 supported for the new type), with F128 or f128 suffixes; for example,
2071 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
2072 printf or scanf formats for the new type; the strfromf128 and strtof128
2073 interfaces should be used instead.
2075 Deprecated and removed features, and other changes affecting compatibility:
2077 * The synchronization that pthread_spin_unlock performs has been changed to
2078 now be equivalent to a C11 atomic store with release memory order to the
2079 spin lock's memory location. Previously, several (but not all)
2080 architectures used stronger synchronization (e.g., containing what is
2081 often called a full barrier). This change can improve performance, but
2082 may affect odd fringe uses of spin locks that depend on the previous
2083 behavior (e.g., using spin locks as atomic variables to try to implement
2084 Dekker's mutual exclusion algorithm).
2086 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
2089 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
2090 will only be built and installed when the GNU C Library is configured with
2091 --enable-obsolete-rpc. This allows alternative RPC implementations, such
2092 as TIRPC or rpcsvc-proto, to be used.
2094 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
2095 libnss_compat, are deprecated, and will not be built or installed by
2098 The NIS(+) support library, libnsl, is also deprecated. By default, a
2099 compatibility shared library will be built and installed, but not headers
2100 or development libraries. Only a few NIS-related programs require this
2101 library. (In particular, the GNU C Library has never required programs
2102 that use 'gethostbyname' to be linked with libnsl.)
2104 Replacement implementations based on TIRPC, which additionally support
2105 IPv6, are available from <https://github.com/thkukuk/>. The configure
2106 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
2107 name service modules, to be built and installed.
2109 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
2110 support is enabled, the configured recursive resolver must support EDNS.
2111 (Responding to EDNS-enabled queries with responses which are not
2112 EDNS-enabled is fine, but FORMERR responses are not.)
2114 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
2115 servers have not supported this opcode for a long time.
2117 * The _res_opcodes variable has been removed from libresolv. It had been
2118 exported by accident.
2120 * <string.h> no longer includes inline versions of any string functions,
2121 as this kind of optimization is better done by the compiler. The macros
2122 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
2124 * The nonstandard header <xlocale.h> has been removed. Most programs should
2125 use <locale.h> instead. If you have a specific need for the definition of
2126 locale_t with no other declarations, please contact
2127 libc-alpha@sourceware.org and explain.
2129 * The obsolete header <sys/ultrasound.h> has been removed.
2131 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
2133 * The obsolete function cfree has been removed. Applications should use
2136 * The stack_t type no longer has the name struct sigaltstack. This changes
2137 the C++ name mangling for interfaces involving this type.
2139 * The ucontext_t type no longer has the name struct ucontext. This changes
2140 the C++ name mangling for interfaces involving this type.
2142 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
2143 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
2144 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
2145 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
2146 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
2147 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
2148 fpregset_t type no longer has the name struct fpu. This changes the C++
2149 name mangling for interfaces involving those types.
2151 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
2152 synced with the kernel:
2154 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
2155 are not supported on this architecture and have been removed.
2157 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
2158 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
2159 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
2161 Programs that assume the GET/SETREGS ptrace requests are universally
2162 available will now fail to build, instead of malfunctioning at runtime.
2164 Changes to build and runtime requirements:
2166 * Linux kernel 3.2 or later is required at runtime, on all architectures
2167 supported by that kernel. (This is a change from version 2.25 only for
2170 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
2172 * On most architectures, GCC 4.9 or later is required to build the GNU C
2173 Library. On powerpc64le, GCC 6.2 or later is required.
2175 Older GCC versions and non-GNU compilers are still supported when
2176 compiling programs that use the GNU C Library. (We do not know exactly
2177 how old, and some GNU extensions to C may be _de facto_ required. If you
2178 are interested in helping us make this statement less vague, please
2179 contact libc-alpha@sourceware.org.)
2181 Security related changes:
2183 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
2184 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
2186 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
2187 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
2189 * Avoid printing a backtrace from the __stack_chk_fail function since it is
2190 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
2193 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
2194 fixed (CVE-2017-12133).
2196 The following bugs are resolved with this release:
2198 [984] network: Respond to changed resolv.conf in gethostbyname
2199 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2200 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2202 [12189] libc: __stack_chk_fail should not attempt a backtrace
2204 [14096] time: Race condition on timezone/tst-timezone.out
2205 [14172] localedata: az_IR: new locale
2206 [14995] build: glibc fails to build if gold is the default linker, even if
2208 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2209 [16637] network: inet_pton function is accepting IPv6 with bad format
2210 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2211 x86 and other generic code
2212 [16875] localedata: ko_KR: fix lang_name
2213 [17225] localedata: ar_SY: localized month names for May and June are
2215 [17297] localedata: da_DK: wrong date_fmt string
2216 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2217 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2218 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2219 [19066] localedata: ar_SA abbreviated day and month names are in English
2220 [19569] network: resolv: Support an arbitrary number of search domains
2221 [19570] network: Implement random DNS server selection in the stub
2223 [19838] locale: localedef fails on PA-RISC
2224 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2225 order of 0D36 and 0D37
2226 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2228 [20098] libc: FAIL: debug/backtrace-tst on hppa
2229 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2231 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2233 [20313] localedata: Update locale data to Unicode 9.0
2234 [20424] manual: Document how to provide a malloc replacement
2235 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2237 [20686] locale: Add el_GR@euro to SUPPORTED.
2238 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2239 failures consistently
2240 [21015] dynamic-link: Document and fix --enable-bind-now
2241 [21016] nptl: pthread_cond support is broken on hppa
2242 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2243 frame-pointer on i386
2244 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2246 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2247 [21088] libc: Build fails with --enable-static-nss
2248 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2249 generic c code is used
2250 [21109] libc: Tunables broken on big-endian
2251 [21112] math: powf has large ulp errors with base close to 1 and exponent
2253 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2255 [21120] malloc: glibc malloc is incompatible with GCC 7
2256 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2258 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2259 (-0.0) when linking with -lieee
2260 [21171] math: log10, log2 and lgamma return incorrect results
2261 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2262 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2263 [21207] localedata: ce_RU: update weekdays from CLDR
2264 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2265 [21217] localedata: Update months from CLDR-31
2266 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2267 [21243] libc: support_delete_temp_file should issue warning for failed
2269 [21244] libc: support resolv_test_start() socket fd close should be
2271 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2272 new posix_spawn implementation
2273 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2274 leads to lower CPU frequency
2275 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2276 [21261] libc: [sparc64] bits/setjmp.h namespace
2277 [21267] network: [mips] bits/socket.h IOC* namespace
2278 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2279 [21270] libc: mmap64 silently truncates large offset values
2280 [21275] libc: posix_spawn always crashes on ia64 now
2281 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2282 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2283 [21289] libc: Incorrect declaration for 32-bit platforms with
2284 _FILE_OFFSET_BITS=64 causes build error
2285 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2286 not support gethostbyname4_r
2287 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2289 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2291 [21340] libc: Support POSIX_SPAWN_SETSID
2292 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2293 [21359] network: ns_name_pack needs additional byte in destination buffer
2294 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2295 against fragmentation attacks (CVE-2017-12132)
2296 [21369] network: resolv: Remove EDNS fallback
2297 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2299 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2300 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2301 [21393] stdio: Missing dup3 error check in freopen, freopen64
2302 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2303 [21399] localedata: Bad description for U00EC in
2304 localedata/charmaps/CP1254
2305 [21411] malloc: realloc documentation error
2306 [21426] network: sys/socket.h uio.h namespace
2307 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2308 [21445] libc: signal.h bsd_signal namespace
2309 [21455] network: Network headers stdint.h namespace
2310 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2312 [21475] network: resolv: Overlong search path is truncated mid-label
2313 [21511] libc: sigstack namespace
2314 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2315 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2316 bits/syscall.h: No such file or directory
2317 [21517] libc: struct sigaltstack namespace
2318 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2319 [21533] localedata: Update locale data to Unicode 10.0
2321 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2322 junk at end of line, first unrecognized character is `@'
2323 [21538] libc: SIG_HOLD missing for XPG4
2324 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2325 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2326 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2327 [21543] libc: sigevent namespace
2328 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2329 size for general purpose registers in mcontext_t structure
2330 [21550] libc: sigwait namespace
2331 [21552] libc: XPG4 bsd_signal namespace
2332 [21554] libc: sigpause namespace
2333 [21560] libc: sys/wait.h signal.h namespace
2334 [21561] libc: waitid namespace
2335 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2336 '/usr/include/stdlib.h': Permission denied
2337 [21575] libc: sys/wait.h missing struct rusage definition
2338 [21584] libc: sigaltstack etc namespace
2339 [21597] libc: siginterrupt namespace
2340 [21607] math: hppa: FAIL: math/test-tgmath
2341 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2343 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2344 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2345 stack and heap (CVE-2017-1000366)
2346 [21625] libc: wait3 namespace
2347 [21654] nss: Incorrect pointer alignment in NSS group merge result
2349 [21657] network: Parse interface zone id for node-local multicast
2350 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2352 [21666] libc: .symver is used on common symbol
2353 [21668] network: resolv: res_init cross-thread broadcast introduces race
2355 [21687] math: tgmath.h totalorder, totalordermag return type
2356 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2358 [21696] libc: Incorrect assumption of of __cpu_mask in
2359 posix/sched_cpucount.c
2360 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2361 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2363 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2364 leading to relocation crash
2365 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2366 `resolv_conf_matches (resp, conf)' failed.
2367 [21710] localedata: Added Samoan language locale for Samoa
2368 [21711] localedata: Pashto yesstr/nostr locale are missing
2369 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2370 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2371 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2372 [21723] localedata: yesstr/nostr missing for Chinese language locale
2373 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2375 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2377 [21728] localedata: New Locale for Tongan language
2378 [21729] localedata: incorrect LC_NAME fields for hi_IN
2379 [21733] localedata: yesstr and nostr are missing for zh_HK
2380 [21734] localedata: Missing yesstr and nostr are for kw_GB
2381 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2382 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2383 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2384 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2386 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2388 [21749] localedata: Wrong abbreviated day name (“abday”) for
2390 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2391 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2392 [21759] localedata: missing yesstr and nostr for Tigrinya
2393 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2394 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2395 [21767] localedata: Missing Bislama locales
2396 [21768] localedata: Missing yesstr and nostr for aa_ET
2397 [21770] localedata: Missing Field in li_NL
2398 [21778] nptl: Robust mutex may deadlock
2399 [21779] libc: MicroBlaze segfaults when loading libpthread
2400 [21783] localedata: Fix int_select international_call_prefixes
2401 [21784] localedata: Inconsistency in country_isbn
2402 [21788] localedata: Missing Country Postal Abbreviations
2403 [21794] localedata: Added-country_isbn-for-Italy
2404 [21795] localedata: Add/Fix country_isbn for France
2405 [21796] localedata: Added country_isbn for Republic of Korea
2406 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2407 [21799] localedata: Added int_select international_call_prefixes
2408 [21801] localedata: Added int_select international_call_prefixes
2409 [21804] nptl: Double semicolon in thread-shared-types.h
2410 [21807] localedata: LC_ADDRESS fix for pap_CW
2411 [21808] localedata: Fix LC_ADDRESS for pap_AW
2412 [21821] localedata: Added country_name in mai_IN
2413 [21822] localedata: Fix LC_TIME for mai_IN
2414 [21823] localedata: missing yesstr, nostr for sa_IN
2415 [21825] localedata: Fix name_mrs for mag_IN
2416 [21828] localedata: 2.26 changelog should mention user visible changes
2418 [21835] localedata: Added Maithili language locale for Nepal
2419 [21838] localedata: Removed redundant data for the_NP
2420 [21839] localedata: Fix LC_MONETARY for ta_LK
2421 [21844] localedata: Fix Latin characters and Months Sequence.
2422 [21848] localedata: Fix mai_NP Title Name
2427 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2428 24731-2:2010, is supported to enable declarations of functions from that
2429 TR. Note that not all functions from that TR are supported by the GNU C
2432 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2433 18661-1:2014, is supported to enable declarations of functions and macros
2434 from that TS. Note that not all features from that TS are supported by
2437 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2438 18661-4:2015, is supported to enable declarations of functions and macros
2439 from that TS. Note that most features from that TS are not supported by
2442 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2443 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2444 Since the GNU C Library defaults to a much newer revision of POSIX, this
2445 will only affect programs that specifically request an old conformance
2446 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2447 see a change in the visible declarations, but a program compiled with
2448 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2451 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2452 defined by all multithreaded code, but glibc has not required this for
2455 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2456 means that in a future release, the macros “major”, “minor”, and “makedev”
2457 will only be available from <sys/sysmacros.h>.
2459 These macros are not part of POSIX nor XSI, and their names frequently
2460 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2461 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2462 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2465 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2466 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2467 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2469 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2470 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2471 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2472 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2473 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2474 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2475 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2476 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2477 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2478 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2479 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2482 * New <math.h> features are added from TS 18661-1:2014:
2484 - Signaling NaN macros: SNANF, SNAN, SNANL.
2486 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2487 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2488 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2490 - llogb functions: the llogb, llogbf and llogbl functions, and the
2491 FP_LLOGB0 and FP_LLOGBNAN macros.
2493 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2496 - Comparison macros: iseqsig.
2498 - Classification macros: iscanonical, issubnormal, iszero.
2500 - Total order functions: totalorder, totalorderf, totalorderl,
2501 totalordermag, totalordermagf, totalordermagl.
2503 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2505 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2506 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2508 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2509 are added to libc. They convert a floating-point number into string.
2511 * Most of glibc can now be built with the stack smashing protector enabled.
2512 It is recommended to build glibc with --enable-stack-protector=strong.
2513 Implemented by Nick Alcock (Oracle).
2515 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2516 intended to be used instead of memset() to erase sensitive data after use;
2517 the compiler will not optimize out calls to explicit_bzero even if they
2518 are "unnecessary" (in the sense that no _correct_ program can observe the
2519 effects of the memory clear).
2521 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2522 to float instead of double. This does not affect the ABI of any libraries
2523 that are part of the GNU C Library, but may affect the ABI of other
2524 libraries that use this type in their interfaces.
2526 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2527 float_t and double_t types are now defined to long double instead of float
2528 and double. These options are not the default, and this does not affect
2529 the ABI of any libraries that are part of the GNU C Library, but it may
2530 affect the ABI of other libraries that use this type in their interfaces,
2531 if they are compiled or used with those options.
2533 * The getentropy and getrandom functions, and the <sys/random.h> header file
2536 * The buffer size for byte-oriented stdio streams is now limited to 8192
2537 bytes by default. Previously, on Linux, the default buffer size on most
2538 file systems was 4096 bytes (and thus remains unchanged), except on
2539 network file systems, where the buffer size was unpredictable and could be
2540 as large as several megabytes.
2542 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2543 for the Linux quota interface which predates kernel version 2.4.22 has
2546 * The malloc_get_state and malloc_set_state functions have been removed.
2547 Already-existing binaries that dynamically link to these functions will
2548 get a hidden implementation in which malloc_get_state is a stub. As far
2549 as we know, these functions are used only by GNU Emacs and this change
2550 will not adversely affect already-built Emacs executables. Any undumped
2551 Emacs executables, which normally exist only during an Emacs build, should
2552 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2554 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2555 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2556 “no-ip6-dotint” had already been the default, and support for the
2557 “ip6-dotint” option was removed from the Internet in 2006.
2559 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2560 flag from <resolv.h> have been removed. The option relied on a
2561 backwards-incompatible DNS extension which was never deployed on the
2564 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2565 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2566 They were already unimplemented.
2568 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2569 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2570 removed again from the IETF name lookup interface specification in RFC
2571 2553. Applications should use getaddrinfo instead.
2573 * DNSSEC-related declarations and definitions have been removed from the
2574 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2575 decode the data part of DNSSEC record types. Previous versions of glibc
2576 only implemented minimal support for the previous version of DNSSEC, which
2577 is incompatible with the currently deployed version.
2579 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2580 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2581 <arpa/nameser.h> header file because the distinction between RR types and
2582 meta-RR types is not officially standardized, subject to revision, and
2583 thus not suitable for encoding in a macro.
2585 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2586 and rhook members of the res_state type in <resolv.h> have been removed.
2587 The glibc stub resolver did not support these hooks, but the header file
2588 did not reflect that.
2590 * For multi-arch support it is recommended to use a GCC which has
2591 been built with support for GNU indirect functions. This ensures
2592 that correct debugging information is generated for functions
2593 selected by IFUNC resolvers. This support can either be enabled by
2594 configuring GCC with '--enable-gnu-indirect-function', or by
2595 enabling it by default by setting 'default_gnu_indirect_function'
2596 variable for a particular architecture in the GCC source file
2599 * GDB pretty printers have been added for mutex and condition variable
2600 structures in POSIX Threads. When installed and loaded in gdb these pretty
2601 printers show various pthread variables in human-readable form when read
2602 using the 'print' or 'display' commands in gdb.
2604 * Tunables feature added to allow tweaking of the runtime for an application
2605 program. This feature can be enabled with the '--enable-tunables' configure
2606 flag. The GNU C Library manual has details on usage and README.tunables has
2607 instructions on adding new tunables to the library.
2609 * A new version of condition variables functions have been implemented in
2610 the NPTL implementation of POSIX Threads to provide stronger ordering
2613 * A new version of pthread_rwlock functions have been implemented to use a more
2614 scalable algorithm primarily through not using a critical section anymore to
2617 Security related changes:
2619 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2620 have been created with makecontext could fail to terminate due to a
2621 missing .cantunwind annotation. This has been observed to lead to a hang
2622 (denial of service) in some Go applications compiled with gccgo. Reported
2623 by Andreas Schwab. (CVE-2016-6323)
2625 * The DNS stub resolver functions would crash due to a NULL pointer
2626 dereference when processing a query with a valid DNS question type which
2627 was used internally in the implementation. The stub resolver now uses a
2628 question type which is outside the range of valid question type values.
2631 The following bugs are resolved with this release:
2633 [4099] stdio: Overly agressive caching by stream i/o functions.
2634 [7065] build: Support building glibc with -fstack-protector or -fstack-
2636 [9842] localedata: en_CA: incorrect date format
2637 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2638 before it started waiting
2639 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2640 [15765] nptl: sem_open is wrongly a cancellation point
2641 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2642 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2644 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2645 library linked with pthread
2646 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2647 "FIXME: Ingo" issue)
2648 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2649 [17252] libc: getrandom and getentropy syscall
2650 [17730] malloc: thread-local storage is sometimes improperly free()'d
2651 after being __libc_memalign()'d
2652 [18241] stdio: failed fseek on memstream does not set errno and can fail
2654 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2656 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2657 PTHREAD_PRIO_INHERIT mutex on ARM
2658 [18784] network: res_query and related function crash for special record
2659 type queries (CVE-2015-5180)
2660 [19380] math: strtod does not raise "inexact"
2661 [19387] string: Integer overflow in memchr
2662 [19390] string: Integer overflow in strncat
2663 [19398] build: linknamespace tests fail with massively parallel build
2664 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2666 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2667 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2668 [19514] libc: [PATCH] Fix spelling errors in spelling
2669 "implement"/"implementation" in several places
2670 [19582] network: Deprecate RES_USE_INET6
2671 [19673] manual: clog10 docs appear to be erroneous
2672 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2673 causes a segmentation fault
2674 [19826] libc: invalid pointer returned from __tls_get_addr with static
2676 [20016] network: resolv: Remove hooks support from the API
2677 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2679 [20033] math: [x86_64] vectorized math function don't call the __finite
2681 [20116] nptl: use after free in pthread_create
2682 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2683 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2685 [20311] nptl: please install proc_service.h
2686 [20366] libc: Compilation errors in installed headers in strict-compliance
2688 [20370] malloc: malloc: Arena free list management is still racy
2689 (incorrect fix in bug 19243)
2690 [20386] libc: assert (X = 0) does not result in GCC warning
2691 [20432] malloc: malloc: Minimize interface required for interposition
2692 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2693 in _Unwind_Backtrace (CVE-2016-6323)
2694 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2695 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2697 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2698 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2699 [20477] network: resolv: incorrect double-checked locking related to
2701 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2703 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2705 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2706 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2707 cause transition penalty
2708 [20517] math: sparcv9 missing fdiml compat symbol
2709 [20524] manual: strverscmp is inconsistent
2710 [20525] libc: <sys/quota.h> should be based on kernel headers
2711 [20539] math: GCC 7 -static -lm fails to link at -O3
2712 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2714 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2716 [20591] network: Remove obsolete DNSSEC support
2717 [20592] network: DNS resource record type classification macros in
2718 <arpa/nameser.h> are incorrect
2719 [20593] network: Update DNS RR type definitions
2720 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2721 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2723 [20629] network: libresolv: Remove support for bitstring labels
2725 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2726 assertion: "maxidx >= 2"
2727 [20660] math: [arm] Use VSQRT
2728 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2729 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2730 [20689] libc: Test for FMA should also check for AVX.
2731 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2732 [20715] math: iszero macro breaks existing code
2733 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2734 [20728] libc: powerpc: Missing TOC stub in clone
2735 [20729] build: glibc-2.24 fails to build for i486 with -Os
2736 [20750] build: Build fails with default PIE enabled gcc-6.x
2737 [20768] math: [alpha] sqrt fegetenv namespace
2738 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2740 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2741 __FLT_EVAL_METHOD__ is 2
2742 [20790] network: rpcgen buffer overrun in get_prog_declaration
2743 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2744 [20829] libc: crypt snprintf namespace
2745 [20847] libc: tst-vfork3 failure
2746 [20855] math: Default bits/mathdef.h has inappropriate float_t
2747 [20859] math: [sh4] FP_ILOGB0 invalid
2748 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2749 U+20AC), not same as GBK
2750 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2751 [20916] math: pow handling of sNaN arguments
2752 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2753 [20919] math: Bad pow (qNaN, 0) result with -lieee
2754 [20940] math: hypot sNaN handling
2755 [20947] math: fmax, fmin sNaN handling
2756 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2757 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2759 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2760 [20973] nptl: robust mutexes: Lost wake-ups
2761 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2762 [20978] nis: strlen on null pointer in nss_nisplus
2763 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2765 [21014] string: i686 memchr overflows internal pointer check
2766 [21019] libc: [mips] n32 lseek incorrect on overflow
2767 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2768 [21026] libc: [MIPS] readahead syscall is broken on n64
2769 [21028] math: Fallback fesetexceptflag should always succeed
2770 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2771 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2773 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2774 [21061] librt: [microblaze] librt lost clock_* exports
2775 [21073] libc: tunables: insecure environment variables passed to
2776 subprocesses with AT_SECURE
2777 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2781 * The minimum Linux kernel version that this version of the GNU C Library
2782 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2783 kernel version 2.6.32 or later suffices (on architectures that already
2784 required kernel versions more recent than 3.2, those requirements remain
2785 unchanged). Linux 3.2 or later kernel headers are required on all
2788 * The pap_AN locale has been deleted. This has been deprecated for a long
2789 time. It has been replaced by pap_AW & pap_CW, both of which have long
2790 been included in previous releases.
2792 * The readdir_r and readdir64_r functions have been deprecated. It is
2793 recommended to use readdir and readdir64 instead.
2795 * The type “union wait” has been removed. It was deprecated in the early
2796 1990s and never part of POSIX. Application code should use the int type
2797 instead of “union wait”.
2799 * A new NSS action is added to facilitate large distributed system
2800 administration. The action, MERGE, allows remote user stores like LDAP
2801 to be merged into local user stores like /etc/groups in order to provide
2802 easy to use, updated, and managed sets of merged credentials. The new
2803 action can be used by configuring it in /etc/nsswitch.conf:
2804 group: files [SUCCESS=merge] nis
2805 Implemented by Stephen Gallagher (Red Hat).
2807 * The deprecated __malloc_initialize_hook variable has been removed from the
2810 * The long unused localedef --old-style option has been removed. It hasn't
2811 done anything in over 16 years. Scripts using this option can safely
2814 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2815 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2816 return the next representable value in the direction of positive infinity
2817 and the nextdown functions return the next representable value in the
2818 direction of negative infinity. These are currently enabled as GNU
2821 Security related changes:
2823 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2824 could result in a stack overflow when getnetbyname was called with an
2825 overly long name. (CVE-2016-3075)
2827 * Previously, getaddrinfo copied large amounts of address data to the stack,
2828 even after the fix for CVE-2013-4458 has been applied, potentially
2829 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2830 instead. Reported by Michael Petlan. (CVE-2016-3706)
2832 * The glob function suffered from a stack-based buffer overflow when it was
2833 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2834 Reported by Alexander Cherepanov. (CVE-2016-1234)
2836 * The Sun RPC UDP client could exhaust all available stack space when
2837 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2838 alloca plugin for GCC. (CVE-2016-4429)
2840 * The IPv6 name server management code in libresolv could result in a memory
2841 leak for each thread which is created, performs a failing naming lookup,
2842 and exits. Over time, this could result in a denial of service due to
2843 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2845 The following bugs are resolved with this release:
2847 [1170] localedata: ne_NP: update Nepali locale definition file
2848 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2850 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2851 [6796] math: fdim() does not set errno on overflow
2852 [10354] libc: posix_spawn should use vfork() in more cases than presently
2853 [11213] localedata: localedata: add copyright disclaimer to locale files
2854 [12143] localedata: chr_US: new Cherokee locale
2855 [12450] localedata: sgs_LT: new locale
2856 [12676] localedata: ln_CD: new locale
2857 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2859 [13304] math: fma, fmaf, fmal produce wrong results
2860 [14259] build: --localedir arg to configure is ignored
2861 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2862 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2863 [14934] localedata: es_CL: wrong first weekday chilean locale
2864 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2866 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2868 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2869 [15368] nptl: raise() is not async-signal-safe
2870 [15479] math: ceil, floor, round and trunc raise inexact exception
2871 [15578] localedata: kk_KZ: various updates
2872 [16003] localedata: pap_AN: punt old locale
2873 [16137] localedata: iw_IL: punt old locale
2874 [16190] localedata: eo: new esperanto locale
2875 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2876 [16742] malloc: race condition: pthread_atfork() called before first
2877 malloc() results in unexpected locking behaviour/deadlocks
2878 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2880 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2881 [17565] localedata: pt_PT: wrong (work-)week start
2882 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2883 [17950] build: Build fails with -msse
2884 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2885 [18433] libc: posix_spawn does not return correctly upon failure to
2887 [18453] localedata: charmaps/IBM875: incorrect codes
2888 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2890 [18896] localedata: he_IL: improvements for currency
2891 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2892 Romanian locale data
2893 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2895 [19056] libc: Deprecate readdir_r
2896 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2898 [19198] localedata: nl_NL: small improvements for Dutch locales
2899 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2900 nameservers (CVE-2016-5417)
2901 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2903 [19400] locale: Language missing in "iso-639.def", trivial fix in
2905 [19431] malloc: Deadlock between fflush, getdelim, and fork
2906 [19505] libc: Incorrect file descriptor validity checks in
2907 posix_spawn_file_actions_add{open,close,dup2}
2908 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2909 when using RTLD_NEXT
2910 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2911 `intl/{gettextP,loadinfo}.h'
2912 [19534] libc: execle, execlp may use malloc
2913 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2914 [19573] network: res_nclose and __res_maybe_init disagree about name
2915 server initialization, breaking Hesiod
2916 [19575] localedata: Status of GB18030 tables
2917 [19581] localedata: sr_* date_fmt string contains additional newline
2918 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2920 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2921 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2922 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2923 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2925 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2927 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2929 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2930 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2931 [19633] locale: strfmon_l applies global locale to number formatting
2932 [19642] network: Memory leak in getnameinfo
2933 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2934 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2936 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2937 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2939 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2940 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2942 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2944 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2946 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2947 pointers and lengths in error-case.
2948 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2949 report errors on UTF-16 surrogates values.
2950 [19755] nscd: nscd assertion failure in gc
2951 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2952 [19759] libc: mempcpy shouldn't be inlined
2953 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2954 [19765] libc: s390 needs an optimized mempcpy
2955 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2956 NAME_MAX limit assumption (CVE-2016-1234)
2957 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2958 [19787] network: Missing and incorrect truncation checks in getnameinfo
2959 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2961 [19791] network: Assertion failure in res_query.c with un-connectable name
2963 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2964 [19822] math: libm.so install clobbers old version
2965 [19825] network: resolv: send_vc can return uninitialized data in second
2966 response to getaddrinfo
2967 [19830] network: nss_dns: should check RDATA length against buffer length
2968 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2969 confronted with A/AAAA records of invalid size
2970 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2971 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2972 [19853] stdio: Printing IBM long double in decimal with high precision is
2974 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2975 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2976 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2978 [19865] network: Assertion failure or memory leak in
2979 _nss_dns_getcanonname_r
2980 [19868] network: nss_dns: netent code does not skip over non-PTR records
2981 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2983 [19881] string: Improve x86-64 memset
2984 [19907] string: Incorrect memcpy tests
2985 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2987 [19925] libc: termios.h XCASE namespace
2988 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2989 [19929] libc: limits.h NL_NMAX namespace
2990 [19931] stdio: Memory leak in vfprintf
2991 [19957] libc: clone(CLONE_VM) access invalid parent memory
2992 [19963] localedata: en_IL: New locale
2993 [19989] stdio: stdio.h cuserid namespace
2994 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2996 [19996] locale: langinfo.h nl_langinfo_l namespace
2997 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2998 [20010] network: getaddrinfo: Stack overflow in hostent translation
3000 [20012] stdio: libio: fmemopen append mode failure
3001 [20014] stdio: stdio.h namespace for pre-threads POSIX
3002 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
3003 [20023] libc: fcntl.h timespec namespace
3004 [20024] math: [x86_64] vectorized sincos trashes the stack
3005 [20031] network: nss_hesiod: Heap overflow in get_txt_records
3006 [20041] time: sys/time.h timespec namespace
3007 [20043] libc: unistd.h missing cuserid for UNIX98 and before
3008 [20044] libc: unistd.h missing pthread_atfork for UNIX98
3009 [20051] libc: ttyslot in wrong header under wrong conditions
3010 [20054] libc: gethostname not declared for XPG4
3011 [20055] libc: termios.h missing tcgetsid for XPG4
3012 [20072] dynamic-link: x86 init_cpu_features is called twice in static
3014 [20073] libc: sys/stat.h fchmod namespace
3015 [20074] libc: stdlib.h rand_r namespace
3016 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
3017 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
3019 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
3020 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
3022 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
3023 [20119] libc: Wrong mask for processors level type from CPUID
3024 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
3025 AS not supporting AVX512
3026 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
3028 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
3029 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
3031 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
3032 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
3033 [20178] libc: posix_spawn{p} should not call exit
3034 [20191] stdio: libio: vtables hardening
3035 [20195] string: FMA4 detection requires CPUID execution with register
3037 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
3038 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
3040 [20212] math: acos (sNaN) returns sNaN
3041 [20213] math: asin (sNaN) returns sNaN
3042 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
3043 [20218] math: [i386] asinhl (sNaN) returns sNaN
3044 [20219] math: [i386] atanhl (sNaN) returns sNaN
3045 [20222] stdio: fopencookie: Mangle function pointers
3046 [20224] math: [i386] cbrtl (sNaN) returns sNaN
3047 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
3048 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
3050 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
3051 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
3052 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
3053 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
3054 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
3055 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
3056 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
3057 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
3058 [20240] math: modf (sNaN) returns sNaN
3059 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
3060 [20250] math: frexp (sNaN) returns sNaN
3061 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
3062 [20255] math: [i386] fdim, fdimf return with excess range and precision /
3064 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
3065 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
3066 subscript is below array bounds [-Werror=array-bounds]
3067 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
3068 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
3070 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
3071 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
3073 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
3074 "invalid" exceptions
3075 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
3076 [20316] localedata: id_ID: Februari instead of Pebruari
3077 [20327] string: POWER8 strcasecmp returns incorrect result
3078 [20347] math: Failure: Test: j0_downward (0xap+0)
3079 [20348] libc: FAIL: misc/tst-preadvwritev64
3080 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
3081 [20350] libc: There is no test for p{read,write}64
3082 [20357] math: Incorrect cos result for 1.5174239687223976
3083 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
3087 * Unicode 8.0.0 Support: Character encoding, character type info, and
3088 transliteration tables are all updated to Unicode 8.0.0, using new
3089 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
3090 These updates cause user visible changes, such as the fixes for bugs
3091 89, 16061, and 18568.
3093 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
3094 kernel-internal CPU set size. This means that requests that change the
3095 CPU affinity which failed before (for example, an all-ones CPU mask) will
3096 now succeed. Applications that need to determine the effective CPU
3097 affinities need to call sched_getaffinity or pthread_getaffinity_np after
3098 setting it because the kernel can adjust it (and the previous size check
3099 would not detect this in the majority of cases).
3101 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
3102 the following new symbols are used: fts64_children, fts64_close,
3103 fts64_open, fts64_read and fts64_set.
3105 * getaddrinfo now detects certain invalid responses on an internal netlink
3106 socket. If such responses are received, an affected process will
3107 terminate with an error message of "Unexpected error <number> on netlink
3108 descriptor <number>" or "Unexpected netlink response of size <number> on
3109 descriptor <number>". The most likely cause for these errors is a
3110 multi-threaded application which erroneously closes and reuses the netlink
3111 file descriptor while it is used by getaddrinfo.
3113 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
3114 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
3115 unnecessary serialization of memory allocation requests across threads.
3116 The defect is now corrected. Users should see a substantial increase in
3117 the concurent throughput of allocation requests for applications which
3118 trigger this bug. Affected applications typically create and
3119 destroy threads frequently. (Bug 19048 was reported and analyzed by
3122 * There is now a --disable-timezone-tools configure option for disabling the
3123 building and installing of the timezone related utilities (zic, zdump, and
3124 tzselect). This is useful for people who build the timezone data and code
3125 independent of the GNU C Library.
3127 * The obsolete header <regexp.h> has been removed. Programs that require
3128 this header must be updated to use <regex.h> instead.
3130 * The obsolete functions bdflush, create_module, get_kernel_syms,
3131 query_module and uselib are no longer available to newly linked binaries;
3132 the header <sys/kdaemon.h> has been removed. These functions and header
3133 were specific to systems using the Linux kernel and could not usefully be
3134 used with the GNU C Library on systems with version 2.6 or later of the
3137 * Optimized string, wcsmbs and memory functions for IBM z13.
3138 Implemented by Stefan Liebler.
3140 * Newly linked programs that define a variable called signgam will no longer
3141 have it set by the lgamma, lgammaf and lgammal functions. Programs that
3142 require signgam to be set by those functions must ensure that they use the
3143 variable provided by the GNU C Library and declared in <math.h>, without
3144 defining their own copy.
3146 * The minimum GCC version that can be used to build this version of the GNU
3147 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
3148 still be used to compile programs using the GNU C Library.
3150 Security related changes:
3152 * An out-of-bounds value in a broken-out struct tm argument to strftime no
3153 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
3155 * The LD_POINTER_GUARD environment variable can no longer be used to disable
3156 the pointer guard feature. It is always enabled. Previously,
3157 LD_POINTER_GUARD could be used to disable security hardening in binaries
3158 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
3161 * An integer overflow in hcreate and hcreate_r could lead to an
3162 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
3164 * The catopen function no longer has unbounded stack usage. Reported by
3165 Max. (CVE-2015-8779)
3167 * The nan, nanf and nanl functions no longer have unbounded stack usage
3168 depending on the length of the string passed as an argument to the
3169 functions. Reported by Joseph Myers. (CVE-2014-9761)
3171 * A stack-based buffer overflow was found in libresolv when invoked from
3172 libnss_dns, allowing specially crafted DNS responses to seize control
3173 of execution flow in the DNS client. The buffer overflow occurs in
3174 the functions send_dg (send datagram) and send_vc (send TCP) for the
3175 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
3176 family. The use of AF_UNSPEC triggers the low-level resolver code to
3177 send out two parallel queries for A and AAAA. A mismanagement of the
3178 buffers used for those queries could result in the response of a query
3179 writing beyond the alloca allocated buffer created by
3180 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
3181 the overflow. Thanks to the Google Security Team and Red Hat for
3182 reporting the security impact of this issue, and Robert Holiday of
3183 Ciena for reporting the related bug 18665. (CVE-2015-7547)
3185 The following bugs are resolved with this release:
3187 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
3188 [887] math: Math library function "logb" and "nextafter" inconsistent
3189 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
3190 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
3191 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
3192 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
3194 [4404] localedata: German translation of "Alarm clock" is misleading
3195 [6799] math: nextafter() and nexttoward() doen't set errno on
3196 overflow/underflow errors
3197 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3199 [10432] nis: _nss_nis_setnetgrent assertion failure
3200 [11460] libc: fts has no LFS support
3201 [12926] network: getaddrinfo()/make_request() may spin forever
3202 [13065] nptl: Race condition in pthread barriers
3203 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3204 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3206 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3207 [14912] libc: Rename non-installed bits/*.h headers
3208 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3209 [15367] math: Let gcc use __builtin_isinf
3210 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3211 [15421] math: lgamma wrongly sets signgam for ISO C
3212 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3213 FE_INVALID with argument out of range
3214 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3216 [15786] dynamic-link: ifunc resolver functions can smash function
3218 [15918] math: Unnecessary check for equality in hypotf()
3219 [16061] localedata: Review / update transliteration data
3220 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3222 [16141] time: strptime %z offset restriction
3223 [16171] math: drem should be alias of remainder
3224 [16296] math: fegetround is pure?
3225 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3226 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3228 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3229 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3231 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3232 "Exception "Inexact" set" on ppc32
3233 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3234 [16517] math: Missing underflow exception from tanf/tan/tanl
3235 [16519] math: Missing underflow exception from sinhf
3236 [16520] math: Missing underflow exception from tanhf
3237 [16521] math: Missing underflow exception from exp2
3238 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3240 [16734] stdio: fopen calls mmap to allocate its buffer
3241 [16961] math: nan function incorrect handling of bad sequences
3242 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3243 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3244 [16985] locale: localedef: confusing error message when opening output
3246 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3247 [17197] locale: Redundant shift character in iconv conversion output at
3249 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3250 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3251 [17250] dynamic-link: static linking breaks nss loading
3252 (getaddrinfo/getpwnam/etc...)
3253 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3255 [17441] math: isnan() should use __builtin_isnan() in GCC
3256 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3257 (related to lock elision)
3258 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3259 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3260 [17887] time: strptime should be able to parse "+01:00" style timezones
3261 [17905] libc: catopen() Multiple unbounded stack allocations
3263 [18084] libc: backtrace (..., 0) dumps core on x86
3264 [18086] libc: nice() sets errno to 0 on success
3265 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3266 is too large (CVE-2015-8778)
3267 [18251] dynamic-link: SONAME missing when audit modules provides path
3268 [18265] libc: add attributes for wchar string and memory functions
3269 [18370] math: csqrt missing underflows
3270 [18421] libc: [hppa] read-only segment has dynamic relocations
3271 [18472] libc: Obsolete syscall wrappers should be compat symbols
3272 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3273 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3274 [18525] localedata: Remove locale timezone information
3275 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3276 [18568] localedata: Update locale data to Unicode 8.0
3277 [18589] locale: sort-test.sh fails at random
3278 [18595] math: ctan, ctanh missing underflows
3279 [18604] libc: assert macro-expands its argument
3280 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3281 contains a vector instruction exception.
3282 [18611] math: j1, jn missing errno setting on underflow
3283 [18618] localedata: sync Chechen locale definitions with other *_RU
3285 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3286 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3287 [18665] network: In send_dg, the recvfrom function is NOT always using the
3288 buffer size of a newly created buffer (CVE-2015-7547)
3289 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3291 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3293 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3294 [18699] math: tilegx cproj() for various complex infinities does not yield
3296 [18724] libc: Harden put*ent functions against data injection
3297 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3298 [18755] build: build errors with -DNDEBUG
3299 [18757] stdio: fmemopen fails to set errno on failure
3300 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3302 [18781] libc: openat64 lacks O_LARGEFILE
3303 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3304 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3305 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3306 [18790] math: [ldbl-128ibm] tanhl inaccurate
3307 [18795] libc: stpncpy fortification misses buffer lengths that are
3308 statically too large
3309 [18796] build: build fails for --disable-mathvec
3310 [18803] math: hypot missing underflows
3311 [18820] stdio: fmemopen may leak memory on failure
3312 [18823] math: csqrt spurious underflows
3313 [18824] math: fma spurious underflows
3314 [18825] math: pow missing underflows
3315 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3316 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3317 [18870] build: sem_open.c fails to compile with missing symbol
3319 [18872] stdio: Fix memory leak in printf_positional
3320 [18873] libc: posix_fallocate overflow check ineffective
3321 [18875] math: Excess precision leads incorrect libm
3322 [18877] libc: arm: mmap offset regression
3323 [18887] libc: memory corruption when using getmntent on blank lines
3324 [18918] localedata: hu_HU: change time to HH:MM:SS format
3325 [18921] libc: Regression: extraneous stat() and fstat() performed by
3327 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3328 binaries (CVE-2015-8777)
3329 [18951] math: tgamma missing underflows
3330 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3332 [18953] localedata: lt_LT: change currency symbol to the euro
3333 [18956] math: powf inaccuracy
3334 [18961] math: [i386] exp missing underflows
3335 [18966] math: [i386] exp10 missing underflows
3336 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3337 [18969] build: multiple string test failures due to missing locale
3339 [18970] libc: Reference of pthread_setcancelstate in libc.a
3340 [18977] math: float / long double Bessel functions not in XSI POSIX
3341 [18980] math: i386 libm functions return with excess range and precision
3342 [18981] math: i386 scalb*, ldexp return with excess range and precision
3343 [18982] stdio: va_list and vprintf
3344 [18985] time: Passing out of range data to strftime() causes a segfault
3346 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3347 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3348 [19012] locale: iconv_open leaks memory on error path
3349 [19016] math: clog, clog10 inaccuracy
3350 [19018] nptl: Mangle function pointers in tls_dtor_list
3351 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3352 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3353 [19048] malloc: malloc: arena free list can become cyclic, increasing
3355 [19049] math: [powerpc] erfc incorrect zero sign
3356 [19050] math: [powerpc] log* incorrect zero sign
3357 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3358 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3359 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3360 [19074] network: Data race in _res_hconf_reorder_addrs
3361 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3362 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3363 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3365 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3367 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3368 [19086] manual: posix_fallocate64 documented argument order is wrong.
3369 [19088] math: lround, llround missing exceptions close to overflow
3371 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3372 [19095] math: dbl-64 lrint incorrect for 64-bit long
3373 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3374 [19124] dynamic-link: ld.so failed to build with older assmebler
3375 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3376 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3377 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3378 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3379 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3380 pthread_setaffinity_np
3381 [19156] math: [ldbl-128] j0l spurious underflows
3382 [19164] nptl: tst-getcpu fails with many possible CPUs
3383 [19168] math: math/test-ildoubl and math/test-ldouble failure
3384 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3385 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3387 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3388 (FE_NOMASK_ENV) do not clear SSE exceptions
3389 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3390 _int_new_arena/reused_arena
3391 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3392 [19201] math: dbl-64 remainder incorrect sign of zero result
3393 [19205] math: bits/math-finite.h conditions do not match math.h and
3395 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3396 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3397 for C99-based standards
3398 [19212] libc: features.h not -Wundef clean
3399 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3401 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3402 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3403 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3405 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3406 "inexact" exceptions
3407 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3409 [19242] libc: strtol incorrect in Turkish locales
3410 [19243] malloc: reused_arena can pick an arena on the free list, leading
3411 to an assertion failure and reference count corruption
3412 [19253] time: tzset() ineffective when temporary TZ did not include DST
3414 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3415 [19270] math: [hppa] Shared libm missing __isnanl
3416 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3417 MAP_HUGETLB and MAP_STACK defines
3418 [19313] nptl: Wrong __cpu_mask for x32
3419 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3420 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3421 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3422 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3423 [19363] time: x32: times() return value wrongly truncates/sign extends
3425 [19367] dynamic-link: Improve branch prediction on Silvermont
3426 [19369] network: Default domain name not reset by res_ninit when "search"
3427 / "domain" entry is removed from resolv.conf
3428 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3430 [19385] localedata: bg_BG: time separator should be colon, not comma
3431 [19408] libc: linux personality syscall wrapper may erroneously return an
3432 error on 32-bit architectures
3433 [19415] libc: dladdr returns wrong names on hppa
3434 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3435 IBM905, IBM907, and IBM909
3436 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3437 [19443] build: build failures with -DDEBUG
3438 [19451] build: Make check fails on test-double-vlen2
3439 [19462] libc: Glibc failed to build with -Os
3440 [19465] math: Wrong code with -Os
3441 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3443 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3445 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3446 [19486] math: S390: Math tests fail with "Exception Inexact set".
3447 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3448 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3450 [19590] math: Fail to build shared objects that use libmvec.so functions.
3454 * The following bugs are resolved with this release:
3456 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3457 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3458 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3459 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3460 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3461 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3462 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3463 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3464 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3465 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3466 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3467 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3468 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3469 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3470 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3471 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3472 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3473 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3474 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3475 18657, 18676, 18694, 18696, 18887.
3477 * Cache information can be queried via sysconf() function on s390 e.g. with
3478 _SC_LEVEL1_ICACHE_SIZE as argument.
3480 * A buffer overflow in gethostbyname_r and related functions performing DNS
3481 requests has been fixed. If the NSS functions were called with a
3482 misaligned buffer, the buffer length change due to pointer alignment was
3483 not taken into account. This could result in application crashes or,
3484 potentially arbitrary code execution, using crafted, but syntactically
3485 valid DNS responses. (CVE-2015-1781)
3487 * The time zone file parser has been made more robust against crafted time
3488 zone files, avoiding heap buffer overflows related to the processing of
3489 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3490 large time zone data files. Overly long time zone specifiers in the TZ
3491 variable no longer result in stack overflows and crashes.
3493 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3494 for LD and GD on x86 and x86-64, has been implemented. You will need
3495 binutils-2.24 or later to enable this optimization.
3497 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3498 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3499 Hat). These updates cause user visible changes, such as the fix for bug
3502 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3503 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3504 condition in some applications.
3506 * Added vector math library named libmvec with the following vectorized x86_64
3507 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3509 The library can be disabled with --disable-mathvec. Use of the functions is
3510 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3511 Shared library libmvec.so is linked in as needed when using -lm (no need to
3512 specify -lmvec explicitly for not static builds).
3513 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3515 * A new fmemopen implementation has been added with the goal of POSIX
3516 compliance. The new implementation fixes the following long-standing
3517 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3518 old implementation is still present for use be by existing binaries.
3520 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3521 releases. It has been fixed to match 2.19 and older, but binaries built
3522 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3524 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3525 Contributed by Roland McGrath (Google).
3527 * The header <regexp.h> is deprecated, and will be removed in a future
3528 release. Use of this header will trigger a deprecation warning.
3529 Application developers should update their code to use <regex.h> instead.
3531 This header was formerly part of SUS, but was deprecated in 1994 and
3532 removed from the standard in 2001. Also, the glibc implementation
3533 leaks memory. See BZ#18681 for more details.
3537 * The following bugs are resolved with this release:
3539 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3540 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3541 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3542 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3543 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3544 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3545 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3546 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3547 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3548 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3551 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3552 too little memory for the to-be-scanned arguments and overflow the
3553 allocated buffer. The implementation now correctly computes the required
3554 buffer size when using malloc, and switches to malloc from alloca as
3557 * A new semaphore algorithm has been implemented in generic C code for all
3558 machines. Previous custom assembly implementations of semaphore were
3559 difficult to reason about or ensure that they were safe. The new version
3560 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3561 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3562 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3564 * Port to Altera Nios II has been contributed by Mentor Graphics.
3566 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3567 implementations for powerpc64/powerpc64le.
3568 Implemented by Adhemerval Zanella (IBM).
3570 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3571 and powerpc64le. This may improve lock scaling of existing programs on
3572 HTM capable systems. The lock elision code is only enabled with
3573 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3574 powerpc will issue a transaction abort on every syscall to avoid side
3575 effects being visible outside transactions.
3577 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3578 AArch64. Contributed by ARM Ltd.
3580 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3582 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3583 under certain input conditions resulting in the execution of a shell for
3584 command substitution when the application did not request it. The
3585 implementation now checks WRDE_NOCMD immediately before executing the
3586 shell and returns the error WRDE_CMDSUB as expected.
3588 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3589 processing format strings with a large number of format specifiers.
3591 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3592 infinite loop if the DNS response contained a PTR record of an unexpected
3595 * The minimum GCC version that can be used to build this version of the GNU
3596 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3597 still be used to compile programs using the GNU C Library.
3599 * The GNU C Library is now built with -Werror by default. This can be
3600 disabled by configuring with --disable-werror.
3602 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3604 * The obsolete sigvec function has been removed. This was the original
3605 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3606 programs have been using instead for about 25 years. Of course, ABI
3607 compatibility for old binaries using sigvec remains intact.
3609 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3610 with newer versions of bison.
3612 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3613 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3614 registers overlay two consecutive single-precision registers. MIPS32R2
3615 introduced a new FPU mode (FR=1) where double-precision registers extend the
3616 corresponding single-precision registers which is incompatible with the
3617 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3618 require the use of FR=1 making a transition necessary. New o32 ABI
3619 extensions enable users to migrate over time from the original o32 ABI
3620 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3621 tracks the ABI of any loaded object and verifies that new objects are
3622 compatible. Mode transitions will also be requested as required and
3623 unsupportable objects will be rejected. The ABI checks include both soft and
3624 hard float ABIs for o32, n32 and n64.
3626 GCC 5 with GNU binutils 2.25 onwards:
3627 It is strongly recommended that all o32 system libraries are built using the
3628 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3629 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3630 compiler using --with-fp-32=xx to set this by default.
3634 * The following bugs are resolved with this release:
3636 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3637 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3638 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3639 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3640 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3641 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3642 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3643 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3644 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3645 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3646 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3647 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3648 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3649 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3650 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3652 * Reverted change of ABI data structures for s390 and s390x:
3653 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3654 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3655 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3656 are preserved pointing straight to the same implementation as the old ones.
3657 Given that, new callers will simply provide a too-big buffer to these
3658 functions. Any applications/libraries out there that embed jmp_buf or
3659 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3660 against 2.19 headers will have to rebuilt again. This is necessary in any
3661 case to revert the breakage in their ABI caused by the glibc change.
3663 * Support for file description locks is added to systems running the
3664 Linux kernel. The standard file locking interfaces are extended to
3665 operate on file descriptions, not file descriptors, via the use of
3666 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3667 are associated with an open file instead of a process.
3669 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3671 * The minimum Linux kernel version that this version of the GNU C Library
3672 can be used with is 2.6.32.
3674 * Running the testsuite no longer terminates as soon as a test fails.
3675 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3676 with PASS or FAIL lines for individual tests. A summary of the results is
3677 printed, including a list of failing lists, and "make check" exits with
3678 error status if there were any unexpected failures. "make check
3679 stop-on-test-failure=y" may be used to keep the old behavior.
3681 * The am33 port, which had not worked for several years, has been removed
3684 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3685 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3686 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3687 conflicted with POSIX (support for which was removed in 2.19), the
3688 interfaces those macros enabled remain available when compiling with
3689 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3690 test macros defined.
3692 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3694 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3695 This may improve lock scaling of existing programs on TX capable systems.
3696 The lock elision code is only built with --enable-lock-elision=yes and
3697 then requires a GCC version supporting the TX builtins. With lock elision
3698 default mutexes are elided via __builtin_tbegin, if the cpu supports
3699 transactions. By default lock elision is not enabled and the elision code
3702 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3703 copy the path argument. This allowed programs to cause posix_spawn to
3704 deference a dangling pointer, or use an unexpected pathname argument if
3705 the string was modified after the posix_spawn_file_actions_addopen
3708 * All supported architectures now use the main glibc sysdeps directory
3709 instead of some being in a separate "ports" directory (which was
3710 distributed separately before glibc 2.17).
3712 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3713 On configurations that support it (all Linux configurations), it's now
3714 used regardless of the --enable-add-ons switch to configure. It is no
3715 longer possible to build such configurations without pthreads support.
3717 * Locale names, including those obtained from environment variables (LANG
3718 and the LC_* variables), are more tightly checked for proper syntax.
3719 setlocale will now fail (with EINVAL) for locale names that are overly
3720 long, contain slashes without starting with a slash, or contain ".." path
3721 components. (CVE-2014-0475) Previously, some valid locale names were
3722 silently replaced with the "C" locale when running in AT_SECURE mode
3723 (e.g., in a SUID program). This is no longer necessary because of the
3726 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3727 with application code using Intel MPX instructions. (With all previous
3728 versions, the MPX register state could be clobbered when making calls
3729 into or out of a shared library.) Note that while the new dynamic
3730 linker is compatible with all known x86 hardware whether or not it
3731 supports Intel MPX, some x86 instruction-set emulators might fail to
3732 handle the new instruction encodings. This is known to affect Valgrind
3733 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3734 release), and might affect other tools that do instruction emulation.
3736 * Support for loadable gconv transliteration modules has been removed.
3737 The support for transliteration modules has been non-functional for
3738 over a decade, and the removal is prompted by security defects. The
3739 normal gconv conversion modules are still supported. Transliteration
3740 with //TRANSLIT is still possible, and the //IGNORE specifier
3741 continues to be supported. (CVE-2014-5119)
3743 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3744 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3745 resulting a denial-of-service security vulnerability in applications which
3746 use functions related to iconv. (CVE-2014-6040)
3750 * The following bugs are resolved with this release:
3752 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3753 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3754 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3755 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3756 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3757 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3758 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3759 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3760 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3761 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3762 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3763 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3764 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3765 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3766 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3767 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3768 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3769 16431, 16453, 16474, 16506, 16510, 16529
3771 * Slovenian translations for glibc messages have been contributed by the
3772 Translation Project's Slovenian team of translators.
3774 * The public headers no longer use __unused nor __block. This change is to
3775 support compiling programs that are derived from BSD sources and use
3776 __unused internally, and to support compiling with Clang's -fblock
3777 extension which uses __block.
3779 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3780 large collation sequences to optimize multiple passes. This cache
3781 computation may overflow for large collation sequences and may cause a
3782 stack or buffer overflow. This is now fixed to use a slower algorithm
3783 which does not use a cache if there is an integer overflow.
3785 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3786 rules for large collation sequences to optimize multiple passes and falls
3787 back to alloca if malloc fails, resulting in a possible stack overflow.
3788 The implementation now falls back to an uncached collation sequence lookup
3791 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3792 initialized for static applications resulting in the security feature
3793 being disabled. The pointer guard is now correctly initialized to a
3794 random value for static applications. Existing static applications need
3795 to be recompiled to take advantage of the fix (bug 15754).
3797 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3798 to the d_name member of struct dirent, or omit the terminating NUL
3799 character. (Bugzilla #14699).
3801 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3802 aligned_alloc functions could allocate too few bytes or corrupt the
3803 heap when passed very large allocation size values (Bugzilla #15855,
3806 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3807 for AF_INET6 has been fixed (Bugzilla #16072).
3809 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3810 pap_CW, quz_PE, the_NP.
3812 * Substantially revised locales: gd_GB, ht_HT
3814 * The LC_ADDRESS field was updated to support country_car for almost all
3817 * ISO 1427 definitions were updated.
3819 * ISO 3166 definitions were updated.
3821 * The localedef utility now supports --big-endian and --little-endian
3822 command-line options to generate locales for a different system from that
3823 for which the C library was built.
3825 * Binary locale files now only depend on the endianness of the system for
3826 which they are generated and not on other properties of that system. As a
3827 consequence, binary files generated with new localedef may be incompatible
3828 with old versions of the GNU C Library, and binary files generated with
3829 old localedef may be incompatible with this version of the GNU C Library,
3830 in the following circumstances:
3832 + Locale files may be incompatible on m68k systems.
3834 + Locale archive files (but not separate files for individual locales) may
3835 be incompatible on systems where plain "char" is signed.
3837 * The configure option --disable-versioning has been removed. Builds with
3838 --disable-versioning had not worked for several years.
3840 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3841 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3843 * SystemTap probes for malloc have been introduced.
3845 * SystemTap probes for slow multiple precision fallback paths of
3846 transcendental functions have been introduced.
3848 * Support for powerpc64le has been added.
3850 * The soft-float powerpc port now supports e500 processors.
3852 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3854 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3855 set of header declarations that are enabled by default, even when other
3856 feature test macros or compiler options such as -std=c99 would otherwise
3857 disable some of those declarations.
3859 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3860 conflict with POSIX. The libbsd-compat library (which was a dummy library
3861 that did nothing) has also been removed.
3863 * Preliminary documentation about Multi-Thread, Async-Signal and
3864 Async-Cancel Safety has been added.
3866 * Change of ABI data structures for s390 and s390x:
3867 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3868 allow for future hardware extensions. All library functions that accept or
3869 return these structures were versioned in order to provide backwards
3870 compatibility with existing code. However, not all cases can be handled
3871 with interface versioning. If an application embeds either structure into
3872 another structure and that structure is passed to another compilation unit
3873 which expects the newer larger-sized object then any access to the new
3874 fields will result in undefined behaviour. Similarly any access to fields
3875 that were moved by the enlarging of the structures will cause undefined
3876 behaviour. To fix the undefined behaviour all objects that are part of the
3877 final in-memory image must agree on the size of structures, and this may
3878 require recompilation.
3882 * The following bugs are resolved with this release:
3884 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3885 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3886 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3887 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3888 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3889 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3890 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3891 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3892 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3893 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3894 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3895 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3896 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3899 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3900 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3901 Distributions can re-enable building and using pt_chown via the new configure
3902 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3903 considerable security risks and should only be used if the distribution
3904 understands and accepts the risks.
3906 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3909 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3910 fixed (Bugzilla #15330).
3912 * Add support for calling C++11 thread_local object destructors on thread
3913 and program exit. This needs compiler support for offloading C++11
3914 destructor calls to glibc.
3916 * Improved worst case performance of libm functions with double inputs and
3919 * Support for priority inherited mutexes in pthread condition variables on
3920 non-x86 architectures.
3922 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3924 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3926 * Optimized string functions for ARM. Implemented by Will Newton and
3929 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3931 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3934 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3935 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3937 * Added a benchmark framework to track performance of functions in glibc.
3939 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3940 It is based on draft TS 18661 and currently enabled as a GNU extension.
3942 * On Linux, the clock function now uses the clock_gettime system call
3943 for improved precision, rather than old times system call.
3945 * Added support for version-3 tz format files. This is needed when using
3946 the tz database release 2013e or later, and affects a few unusual cases --
3947 currently only TZ='America/Godthab' for time stamps after 2037.
3949 * Added new API functions pthread_getattr_default_np and
3950 pthread_setattr_default_np to get and set the default pthread
3951 attributes of a process.
3953 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3954 This may improve lock scaling of existing programs on TSX capable systems.
3955 When the --enable-lock-elision=yes parameter is specified at configure
3956 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3959 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3960 availability). Implemented by Ryan S. Arnold.
3962 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3966 * The following bugs are resolved with this release:
3968 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3969 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3970 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3971 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3972 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3973 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3974 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3975 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3976 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3977 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3978 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3979 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3980 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3981 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3982 14879, 14889, 14893, 14898, 14914.
3984 * Optimization of memcpy for MIPS.
3986 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3987 EMFILE has been fixed (Bugzilla #14889).
3989 * The add-on ports collection is now distributed in the "ports" subdirectory
3990 of the main GNU C Library distribution, rather than separately.
3992 * Port to ARM AArch64 contributed by Linaro.
3994 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3995 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3997 Implemented by Andreas Krebbel.
3999 * The new function secure_getenv allows secure access to the environment,
4000 returning NULL if running in a SUID/SGID process. This function replaces
4001 the internal function __secure_getenv.
4003 * SystemTap static probes have been added into the dynamic linker.
4004 Implemented by Gary Benson.
4006 * Optimizations of string functions strstr, strcasestr and memmem.
4007 Implemented by Maxim Kuvyrkov.
4009 * The minimum Linux kernel version that this version of the GNU C Library
4010 can be used with is 2.6.16.
4012 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
4013 powerpc POWER7. Implemented by Will Schmidt.
4015 * New configure option --disable-nscd builds the C library such that it
4016 never attempts to contact the Name Service Caching Daemon (nscd).
4017 New configure option --disable-build-nscd avoids building nscd itself;
4018 this is the default if --disable-nscd is used.
4020 * Improved support for cross-compilation, including cross-testing and
4021 bootstrap builds without a previously built glibc.
4023 * Several testsuite tests are now able to test multiple IFUNC variants of an
4024 interface, rather than just testing the one that would be chooen by
4027 * New configure options --with-bugurl and --with-pkgversion, for
4028 distributors to use to embed their bug-reporting and package version
4029 information in --help and --version output.
4031 * The ttyname and ttyname_r functions on Linux now fall back to searching for
4032 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
4033 allows creation of chroots without the procfs mounted on /proc.
4035 * The `crypt' function now fails if passed salt bytes that violate the
4036 specification for those values. On Linux, the `crypt' function will
4037 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
4038 enabled, and fail on encrypted strings using the MD5 or DES algorithm
4039 when the mode is enabled.
4041 * The `clock_*' suite of functions (declared in <time.h>) is now available
4042 directly in the main C library. Previously it was necessary to link with
4043 -lrt to use these functions. This change has the effect that a
4044 single-threaded program that uses a function such as `clock_gettime' (and
4045 is not linked with -lrt) will no longer implicitly load the pthreads
4046 library at runtime and so will not suffer the overheads associated with
4047 multi-thread support in other code such as the C++ runtime library.
4049 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
4054 * The following bugs are resolved with this release:
4056 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
4057 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
4058 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
4059 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
4060 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
4061 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
4062 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
4063 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
4064 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
4065 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
4066 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
4067 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
4068 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
4069 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
4070 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
4071 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
4072 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
4073 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
4074 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
4075 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
4076 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
4077 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
4080 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
4081 configuring glibc with:
4082 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
4083 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
4084 Implemented by H.J. Lu.
4088 + define static_assert
4090 + do not declare gets
4092 + declare at_quick_exit and quick_exit also for ISO C11
4094 + aligned_alloc. NB: The code is deliberately allows the size parameter
4095 to not be a multiple of the alignment. This is a moronic requirement
4096 in the standard but it is only a requirement on the caller, not the
4099 + timespec_get added
4101 + uchar.h support added
4103 + CMPLX, CMPLXF, CMPLXL added
4105 Implemented by Ulrich Drepper.
4107 * Support for the IA-64 has been moved to ports.
4109 * Remove support for anything but ELF binary format
4111 * Checking versions of poll, ppoll added.
4112 Implemented by Ulrich Drepper.
4114 * More generic and 64-bit performance optimizations to math functions.
4115 Implemented by Ulrich Drepper.
4117 * New configure option --enable-obsolete-rpc makes the deprecated RPC
4118 headers and functions available at compile time as they were before
4119 version 2.14. This option will be removed at some time in the future
4120 after the TI-RPC library becomes fully sufficient for the needs of
4121 existing applications.
4123 * Compatibility code for Linux kernel versions before 2.4 has been removed.
4124 Note that glibc is not expected to work with any Linux kernel version
4127 * New header <sys/auxv.h> and function getauxval allowing easy access to
4128 the AT_* key-value pairs passed from the Linux kernel. The header also
4129 defines the HWCAP_* bits associated with the AT_HWCAP key.
4131 * New locales: mag_IN
4133 * New configure option --enable-systemtap builds SystemTap static probes
4134 into libc for setjmp and longjmp and into libpthread for various operations.
4135 So far the setjmp/longjmp probes and some of the libpthread probes are
4136 provided only for i*86 and x86_64.
4137 Implemented by Roland McGrath and Rayson Ho.
4139 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
4141 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
4144 * More optimized functions for SPARC. Implemented by David S. Miller.
4146 * Improved support for cross-compilation, especially bootstrap builds
4147 without a previously built glibc.
4149 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
4150 Chris Metcalf from Tilera.
4152 * Support for the old ARM ABI has been removed from ports. Only the EABI is
4153 now supported for ARM processors.
4155 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
4156 as the name of the dynamic linker, to distinguish it from the
4157 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
4159 * Support for CRIS has been removed from ports.
4161 * A new class of installed header has been documented for low-level
4162 platform-specific functionality. PowerPC added the first instance with a
4163 function to provide time base register access. Contributed by Tulio
4164 Magno Quites Machado Filho.
4166 * ix86 configurations now install header files that are consistent with
4167 what x86-64 configurations install. These same header files can be used
4168 for -m32, -m64, or -mx32 builds.
4169 Contributed by H.J. Lu.
4171 * Math library bug fixes. A thorough audit of all open math library bugs was
4172 conducted by Joseph Myers. Significant progress was made on many math
4173 library bugs resulting in more accurate exceptions and function results.
4174 Many thanks to all those that contributed including Andreas Jaeger for his
4175 patch review and work on the x87 trigonometric instruction issues.
4177 * Timezone data is no longer installed. Timezone-related binaries and scripts
4178 will continue to be installed. Users should obtain their timezone data from
4179 their distribution provider or from the tzdata package at
4180 <ftp://munnari.oz.au/pub/>.
4184 * The following bugs are resolved with this release:
4186 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
4187 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
4188 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
4189 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
4190 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
4191 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
4192 13484, 13506, 13515, 13523, 13524, 13538, 13540
4194 * New program pldd to list loaded object of a process
4195 Implemented by Ulrich Drepper.
4197 * Add nss_db support back to glibc. No more dependency on Berkeley db
4198 and support for initgroups lookups.
4199 Implemented by Ulrich Drepper.
4201 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4202 Contributed by HJ Lu.
4204 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4205 Contributed by HJ Lu.
4207 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4208 on x86-32 and x86-64.
4209 Contributed by Liubov Dmitrieva.
4211 * Optimized strchr and strrchr for SSE on x86-32.
4212 Contributed by Liubov Dmitrieva.
4214 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4215 for x86-64 and x86-32.
4216 Contributed by Liubov Dmitrieva.
4218 * New interfaces: scandirat, scandirat64
4219 Implemented by Ulrich Drepper.
4221 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4222 Implemented by Ulrich Drepper.
4224 * nscd now also caches the netgroup database.
4225 Implemented by Ulrich Drepper.
4227 * Integrate libm with gcc's -ffinite-math-only option.
4228 Implemented by Ulrich Drepper.
4230 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4231 to math functions. Implemented by Ulrich Drepper.
4233 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4234 Implemented by Ulrich Drepper.
4236 * New Linux interfaces: process_vm_readv, process_vm_writev
4238 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4239 Implemented by Ulrich Drepper.
4241 * Optimized nearbyint and strcasecmp for PPC.
4242 Implemented by Adhemerval Zanella.
4244 * New locales: bho_IN, unm_US, es_CU, ta_LK
4248 * The following bugs are resolved with this release:
4250 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4251 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4252 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4253 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4254 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4255 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4256 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4257 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4258 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4259 12795, 12811, 12813, 12814, 12841
4261 * The RPC implementation in libc is obsoleted. Old programs keep working
4262 but new programs cannot be linked with the routines in libc anymore.
4263 Programs in need of RPC functionality must be linked against TI-RPC.
4264 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4266 Visible changes of this change include (obviously) the inability to link
4267 programs using RPC functions without referencing the TI-RPC library and the
4268 removal of the RPC headers from the glibc headers.
4269 Implemented by Ulrich Drepper.
4271 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4272 syncfs, setns, sendmmsg
4274 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4275 yue_HK, lij_IT, mhr_RU
4277 * New encodings: CP770, CP771, CP772, CP773, CP774
4279 * New program sotruss to trace calls through PLTs
4280 Implemented by Ulrich Drepper.
4282 * The malloc hook implementation is marked deprecated and will be removed
4283 from the default implementation in the next version. The design never
4284 worked ever since the introduction of threads. Even programs which do
4285 not create threads themselves can use multiple threads created internally.
4289 * The following bugs are resolved with this release:
4291 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4292 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4293 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4294 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4297 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4299 * POWER7 optimizations: memset, memcmp, strncmp
4301 * New optimized string functions for x86-64: strnlen (SSE2),
4302 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4303 Implemented by Ulrich Drepper.
4307 * The following bugs are resolved with this release:
4309 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4310 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4311 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4312 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4313 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4314 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4315 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4316 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4318 * New interfaces: pthread_getname_np, pthread_setname_np
4320 * New Linux interface: recvmmsg
4322 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4324 * The dynamic linker now recognizes supported ABI versions from the
4325 EI_ABIVERSION field in the ELF header.
4326 Implemented by Ulrich Drepper.
4328 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4329 will not be used to fill in password fields in the passwd.byname replies.
4330 Instead it is used to synthesize the shadow.byname table, should it be
4331 missing. This is a useful mode in some installations involving Solaris.
4332 Implemented by Ulrich Drepper.
4334 * New locales: kok_IN, sq_MK, cv_RU
4338 * The following bugs are resolved with this release:
4340 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4341 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4342 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4343 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4344 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4345 10789, 10817, 10823, 10840, 10847
4347 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4349 Implemented by Ulrich Drepper.
4351 * Checking version of longjmp added that fails if an uninitialized stack
4352 frame would be created. Implemented by Ulrich Drepper.
4354 * STT_GNU_IFUNC is now supported in static executables.
4355 Implemented by H.J. Lu.
4357 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4359 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4360 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4361 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4362 Contributed by H.J. Lu.
4364 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4365 Implemented by Ulrich Drepper.
4367 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4369 Contributed by H.J. Lu.
4371 * Support for fma instruction in AVX on x86-64.
4372 Implemented by H.J. Lu and Ulrich Drepper.
4374 * AVX support in x86-64 auditing support in ld.so.
4375 Implemented by H.J. Lu.
4377 * STB_GNU_UNIQUE support added.
4378 Implemented by Ulrich Drepper.
4380 * Implement second fallback mode for optimized DNS lookup for even more
4381 broken environments. If two requests from the same port are not
4382 handled correctly close the socket and open a new one before sending
4383 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4384 can be used to select this mode right away, instead of rediscovering the
4385 necessity is every process again.
4386 Implemented by Ulrich Drepper.
4388 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4389 Implemented by Adam Tkac.
4391 * Optimized iconv conversions for S390x.
4392 Implemented by Andreas Krebbel.
4394 * Using condvars with PI mutexes is now more efficient due to kernel
4395 support for requeueing to PI futexes. NPTL support added for x86-64.
4396 Implemented by Ulrich Drepper.
4398 * New locales: ps_AF, my_MM
4402 * The following bugs are resolved with this release:
4404 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4405 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4406 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4407 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4408 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4410 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4411 Implemented by Ulrich Drepper.
4413 * New Linux interfaces: accept4, fallocate, fallocate64.
4414 Implemented by Ulrich Drepper.
4416 * Correct declarations of string function when used in C++ code. This
4417 could lead to compile errors for invalid C++ code.
4419 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4422 * New POSIX 2008 interface: psiginfo
4423 Implemented by Ulrich Drepper.
4425 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4426 Implemented by Ulrich Drepper.
4428 * Support for selecting between multiple function definitions at runtime
4429 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4431 * The libcrypt library can now use the hash function implementations in
4432 NSS. Implemented by Ulrich Drepper.
4434 * The malloc implementation can be compiled to be less memory efficient
4435 but higher performing in multi-threaded programs.
4436 Implemented by Ulrich Drepper.
4438 * New locales: nan_TW@latin, ks_IN
4440 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4441 Implemented by Ulrich Drepper.
4443 * Extended printf hook support. It is possible to use user-defined types
4444 and extend existing format specifiers.
4445 Implemented by Ulrich Drepper.
4447 * Handling for group shadow files has been added.
4448 Implemented by Ulrich Drepper.
4450 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4451 servers (the case, e.g., for some people using the built-in DNS
4452 server in ADSL modems/routers). There is a once-per-process timeout
4453 in case of a broken server. To avoid it, users can run nscd or put
4454 'options single-request' in /etc/resolv.conf.
4455 Implemented by Ulrich Drepper.
4459 * The following bugs are resolved with this release:
4461 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4462 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4463 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4464 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4465 6968, 6974, 6980, 6995, 7008, 7009, 7029
4467 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4468 up at the same time. Implemented by Ulrich Drepper.
4470 * TLS descriptors for LD and GD on x86 and x86-64.
4471 Implemented by Alexandre Oliva.
4473 * getaddrinfo now handles DCCP and UDPlite.
4474 Implemented by Ulrich Drepper.
4476 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4477 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4478 Implemented by Ulrich Drepper.
4480 * New implementation of memmem, strstr, and strcasestr which is O(n).
4481 Implemented by Eric Blake.
4483 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4485 * Implement "e" option for popen to open file descriptor with the
4486 close-on-exec flag set. Implemented by Ulrich Drepper.
4488 * Implement "b" mode for fmemopen. In this mode writes writes don't
4489 implicitly add a NUL byte and seeks from the end of the buffer really
4490 use the buffer end, not the string length as the basis.
4491 Implemented by Ulrich Drepper.
4493 * Many functions, exported and internal, now atomically set the close-on-exec
4494 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4496 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4498 Implemented by Pravin Satpute.
4500 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4504 * The following bugs are resolved with this release:
4506 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4507 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4508 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4509 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4510 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4511 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4512 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4514 * New locales: bo_CN, bo_IN, shs_CA.
4516 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4518 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4519 Implemented by Pravin Satpute.
4521 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4523 * nscd caches now all timeouts for DNS entries
4524 Implemented by Ulrich Drepper.
4526 * nscd is more efficient and wakes up less often.
4527 Implemented by Ulrich Drepper.
4529 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4530 vdprintf, and obstack_vprintf.
4531 Implemented by Jakub Jelinek.
4533 * Faster memset for x86-64.
4534 Implemented by Harsha Jagasia and H.J. Lu.
4536 * Faster memcpy on x86.
4537 Implemented by Ulrich Drepper.
4539 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4540 Implemented by Ulrich Drepper.
4542 * Faster sqrt and sqrtf implemention for some PPC variants.
4543 Implemented by Steven Munroe.
4547 * The following bugs are resolved with this release:
4549 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4550 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4551 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4552 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4553 5071, 5103, 5104, 5112, 5113, 5184, 5186
4555 * More checking functions: fread, fread_unlocked, open*, mq_open.
4556 Implemented by Jakub Jelinek and Ulrich Drepper.
4558 * Extend fortification to C++. Implemented by Jakub Jelinek.
4560 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4561 by not recognizing 'a' as a modifier when those specs are requested.
4562 Implemented by Jakub Jelinek.
4564 * PPC optimizations to math and string functions.
4565 Implemented by Steven Munroe.
4567 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4568 options to be passed. Implemented by Ulrich Drepper.
4570 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4572 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4573 Implemented by Ulrich Drepper.
4575 * Handle private futexes in the NPTL implementation.
4576 Implemented by Jakub Jelinek and Ulrich Drepper.
4578 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4579 Implemented by Roland McGrath and Ulrich Drepper.
4581 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4583 * SHA-256 and SHA-512 based password encryption.
4584 Implemented by Ulrich Drepper.
4586 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4587 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4590 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4591 Implemented by Ulrich Drepper.
4595 * The following bugs are resolved with this release:
4597 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4598 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4599 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4600 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4601 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4602 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4603 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4606 * New Linux interfaces: epoll_pwait, sched_getcpu.
4608 * New generic interfaces: strerror_l.
4610 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4614 * The following bugs are resolved with this release:
4616 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4617 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4618 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4619 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4620 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4621 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4622 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4623 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4624 3225, 3251, 3252, 3253, 3273
4626 * For Linux, the sorting of addresses returned by getaddrinfo now also
4627 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4628 Implemented by Ulrich Drepper.
4630 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4631 Implemented by Ulrich Drepper.
4633 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4635 * New iconv module for MIK. Contributed by Alexander Shopov.
4637 * For sites with broken group and/or passwd database, the auto-propagate
4638 option of nscd can prevent creating ID lookup entries from the results
4639 of a name lookup and vice versa. This usually is no problem but some
4640 site might have problems with the default behavior.
4641 Implemented by Ulrich Drepper.
4643 * Iterating over entire database in NIS can be slow. With the
4644 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4645 to trade time for memory. The entire database will be read at once.
4646 Implemented by Ulrich Drepper.
4648 * The interfaces introduced in RFC 3542 have been implemented by
4651 * Support for the new ELF hash table format was added by Ulrich Drepper.
4653 * Support for priority inheritance mutexes added by Jakub Jelinek and
4656 * Support for priority protected mutexes added by Jakub Jelinek.
4658 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4659 or_IN, csb_PL, fy_NL, sr_ME.
4663 * More overflow detection functions.
4665 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4666 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4668 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4669 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4670 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4671 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4672 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4673 by Masahide Washizawa.
4675 * It is now possible to install audit libraries for the dynamic linker using
4676 LD_AUDIT. Implemented by Ulrich Drepper.
4678 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4679 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4680 For a libc and libpthread that works well on Linux 2.4 kernels, we
4681 recommend using the stable 2.3 branch.
4683 * The new function open_wmemstream acts like open_memstream,
4684 but uses a wchar_t wide character buffer.
4686 * The new function ppoll is an improved version of poll, similar to pselect.
4688 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4689 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4690 renameat, unlinkat, linkat, symlinkat, readlinkat.
4692 * New Linux kernel system calls: unshare,
4693 inotify_init, inotify_add_watch, inotify_rm_watch.
4695 * The euidaccess function is now also known by the alias eaccess,
4696 for compatibility with some other systems.
4698 * Timezone data updated to 2006b version.
4702 * The following bugs are resolved with this release:
4704 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4705 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4706 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4707 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4708 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4709 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4711 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4713 * As of this release, GCC 4 can be used to compile the C Library.
4715 * Timezone data updated to 2005m version.
4719 * The following bugs are resolved with this release:
4721 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4722 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4723 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4724 777, 787, 821, 822, 823, 825
4726 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4730 * Support for RFC 3678. Real implementations exist only for Linux so far.
4731 Implemented by Ulrich Drepper.
4733 * nscd can now cache entries persistently. Expiring entries are reloaded.
4734 For speedups the cache can be shared in memory with client processes.
4735 Implemented by Ulrich Drepper.
4737 * nscd can now perform SELinux checks.
4738 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4740 * getaddrinfo queries are now cached. Canonical name lookup is performed
4742 Implemented by Ulrich Drepper.
4744 * The nothrow function attribute is used when headers are used by gcc when
4745 compiling C code. This can avoid significant amounts of exception
4748 * The malloc functions perform more error checking and are stricter when
4749 it comes to reacting on errors. The default action is to terminate
4750 the process after showing an error message. Implemented by Ulrich Drepper.
4752 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4753 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4755 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4756 namespaces using the new function dlmopen(). This feature is of course,
4757 like most other dynamic loading functionality, not available in statically
4758 linked applications. Implemented by Ulrich Drepper.
4760 * Low-overhead boundary checking variants of string and some stdio functions
4761 were added. These are to be used in conjunction with a gcc patch by
4762 Jakub Jelinek which adds calls to these functions if possible.
4763 Implemented by Jakub Jelinek and Ulrich Drepper.
4765 * Old code for several operating systems and machine architectures that
4766 have not been in working condition in a long time have been removed from
4767 the main source tree maintained by the GNU C Library's maintainers.
4768 These files are now reside in the separate `ports' source module
4769 that is usable as an add-on when building the library.
4773 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4774 interrogate the dynamic linker, compatible with the Solaris interface.
4776 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4777 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4779 * getifaddrs now uses the netlink interface on Linux to get its information.
4780 Implemented by Thorsten Kukuk.
4782 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4783 Implemented by Ulrich Drepper.
4785 * support for non-executable stacks on x86 has been added. Changes mostly
4788 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4791 * getaddrinfo now performs destination address selection according to
4796 * Thread-safe interfaces for many functions that access locale data
4797 were added in version 2.3, but these features were omitted from NEWS.
4798 Many functions have variants with an `_l' suffix that take a `locale_t'
4799 object as a parameter rather than consulting the current locale.
4800 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4801 create and maintain `locale_t' objects. Additionally, the new function
4802 `uselocale' sets "the current locale" (as used by functions not so
4803 parameterized) set for an individual thread. These features were added
4804 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4806 * The functions getresuid, getresgid, setresuid, and setresgid, which
4807 have long been available on Linux, are now declared in <unistd.h>
4808 and are now also available on the Hurd.
4810 * ELF thread-local storage support (TLS) now works on x86-64.
4812 * The new dynamic string token $LIB is expanded in shared library names.
4813 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4815 * Aldy Hernandez contributed complete software floating point support for
4816 PowerPC machines with no FPU.
4818 * fexecve is implemented on Linux.
4820 * The `btowc' function should work at least twice as fast due to
4821 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4823 * With approriate thread add-ons cancelable functions are now implemented
4824 in libc.so as well. No need to call the function in libpthread. This
4825 change allowed to finally disable the incorrect and expensive handling
4826 of weak definition in ld.so.
4828 * Yet more PLT entries in libc.so have been removed. We finally arrived
4829 at the bare minimum. Startup times improved appropriately.
4831 * Support for the new Linux/x86 system call interface was added. The
4832 AT_SYSINFO auxiliary vector entry is recognized and handled.
4836 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4839 * iconv (the program and the interface) now accepts empty names (excluding
4840 options like //TRANSLIT) to mean "use charset of current locale".
4842 * localedef can now transliterate characters in strings which are not in
4843 the provided charmap. The information from the input locale is used.
4845 * Prelinking support was added for ELF targets. This requires additional
4846 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4848 * Read-only stdio streams now use mmap to speed up operation by eliminating
4849 copying and buffer underflows. To use add 'm' to the mode string of
4850 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4852 * The malloc functions were completely rewritten by Wolfram Gloger based
4853 on Doug Lea's malloc-2.7.0.c.
4855 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4856 implementation of regex.
4858 * Bruno Haible upgraded the iconv and locale implementation to support
4861 * Contents of the LC_* and LANG environment variables in the CEN style are
4862 not recognized anymore. It never was used. Change by Ulrich Drepper.
4864 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4865 thread-local storage (TLS) ABI on some platforms.
4866 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4868 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4869 EUC-JISX0213, and TSCII.
4871 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4872 BSD-compatible interface for getting all network interface addresses.
4873 Implementation for IPv4 by Roland McGrath.
4875 * Loading of locale data is faster due to the introduction of a locale
4876 archive. Implemented by Roland McGrath and Ulrich Drepper.
4878 * Startup times are significantly reduced by not using exported functions
4879 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4882 * Steven Munroe contributed a port to PowerPC64/Linux.
4886 * The Hurd now uses the GNU libio implementation of stdio rather than the
4887 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4889 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4890 with the same behavior as the Linux system call of the same name.
4894 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4895 128-bit long double format.
4897 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4898 IBM1161, and IBM1162 charsets.
4900 * Andreas Jaeger contributed a port to x86-64/Linux.
4902 * Peter Bruin contributed a port to PowerPC/Hurd.
4904 * libc functions using I/O streams now can handle wide-oriented streams
4907 * optimizations in the dynamic linker. Binaries created by recent binutils
4908 versions start up quicker due to reduced time spent on relocations.
4910 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4914 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4915 asinh, atanh, j0 for the 128-bit long double format.
4917 * Bruno Haible updated all the code handling Unicode in some form to
4918 support Unicode 3.1.
4920 * Speed of regex for single-byte locales is back to previous levels.
4921 Patch by Isamu Hasegawa.
4923 * Alpha, SPARC, and IA-64 now also using floating stacks.
4925 * Startup time of internationalized applications greatly improved through
4926 iconv cache. Use iconvconfig to generate the cache file.
4927 Contributed by Ulrich Drepper.
4929 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4930 severe performance problems. Patch by David Mosberger.
4932 * The Hurd port got a lot more functionality like AIO, various stdio
4933 extensions, etc. Mainly done by Roland McGrath.
4935 * mtrace can now lookup symbols in shared libraries.
4939 * Intel's IA-64 math library is largely integrated. It provides fast and
4940 accurate implementatations for most basic and standard math functions
4941 in float, double, and long double format.
4943 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4944 and asin for the 96-bit long double format and asin, log, tan for the
4945 128-bit long double format.
4947 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4948 The basic double functions exist today. Contributed by Abraham Ziv
4949 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4950 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4952 * An asynchronous name lookup library was added. The interface is designed
4953 after POSIX AIO. The proposal was circulated beforehand to get comments.
4954 No negative ones came in. Implemented by Ulrich Drepper.
4956 * Port to S390/64bit contributed by Martin Schwidefsky
4957 <schwidefsky@de.ibm.com>.
4959 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4960 of functions for Linux/IA-64.
4962 * The RPC code is now thread safe. Threads can now use the same service
4963 of different services at the same time. Patch by Eric Norum
4964 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4966 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4967 family of functions for Linux/S390.
4969 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4970 of functions for Linux/x86.
4972 * Port to Linux/CRIS contributed by Axis Communications.
4976 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4977 we can now check for namespace violations and missing declarations. The
4978 result is that almost all headers are now Unix-compliant (as defined in
4979 the upcoming XPG6). The negative side is that some programs might need
4980 corrections, too, if they depend on the incorrect form of the headers in
4981 previous versions which defined too many symbols and included too many
4984 * regex now handles multibyte character sets correctly.
4985 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4987 * iconv (the program) does now conform to the upcoming XPG6 and handles
4988 charmaps. Instead of the charset names the path of charmaps can be
4989 provided and the conversion happens based on this data.
4990 Contributed by Ulrich Drepper.
4992 * The locale program now provides detailed information about the installed
4997 only lists the names of the supported locales
5001 provides details such as country, language, and codeset name.
5002 Contributed by Ulrich Drepper.
5006 * The gencat program now parses the input file according to the charset
5007 selected by the LC_CTYPE category. This is important for stateful
5008 character sets. To make generating catalogs easier there is a way
5009 to overwrite the charset selected by the locale: before the first
5010 message or $ quote line the catalog can contain a line like
5012 $ codeset=ISO-8859-2
5014 to select the charset (ISO-8859-2 in this case).
5016 Implemented by Shinya Hanataka and Ulrich Drepper.
5018 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
5019 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
5020 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
5022 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
5023 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
5025 * The LANGUAGE environment variable is now ignored unless the locale is
5026 changed from the default "C" locale.
5028 * The usual bug fixes.
5032 * Greg McGary added runtime support for bounds checking using gcc's
5033 new -fbounded-pointers option. ix86 target is complete. PowerPC
5036 * Thorsten Kukuk added secure mode support to nscd.
5038 * The Berkeley db libraries have been removed.
5040 Related, the nss_db module is now in a separate package since it
5041 obviously requires a database library being available.
5043 * Wide character I/O streams implemented by Ulrich Drepper.
5045 * Functions from the extended socket API added by Ulrich Drepper.
5047 * Functions feenableexcept and fedisableexcept to control the
5048 behaviour of individual exceptions have been added by Andreas Jaeger.
5050 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
5052 * The resolver code has been updated from bind 8.2.3-T5B which supports
5053 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
5056 This change could in some situations effect backward compatibility. Since
5057 now `_res' is a thread-local instead of a global variable, modifying it
5058 in one thread does not have any effect in other threads.
5060 The resolver library was also extended to allow IPv6 as the transport
5061 protocol for the requests. This work was done by Stig Venaas.
5063 * Compatibility code for K&R C compilers has been removed from the
5064 header files. A ISO C compiler is needed to use the library
5065 (conforming to either C89 or C99 standard).
5067 * Complete rewrite of the localedef program to support multibyte character
5068 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
5069 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
5070 Implemented by Ulrich Drepper.
5072 Bruno Haible significantly improved the generation and use of the data
5073 structures for the wide character tables.
5075 * Plural handling in gettext implemented by Ulrich Drepper.
5077 * The utmp daemon has been removed.
5079 * The port to MIPS-Linux has been finished by Andreas Jaeger.
5081 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
5084 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
5086 * POSIX barriers implemented by Kaz Kylheku.
5088 * POSIX spawn function family implemented by Ulrich Drepper.
5090 * POSIX spinlocks are now available.
5092 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
5094 * the configure option --enable-kernel=X.Y.Z allows to strip out
5095 compatibility for kernel versions before X.Y.Z. This is currently only
5096 implemented for Linux.
5098 * the sockaddr_in6 structure changed. The IPv6 working group added a new
5099 field sin6_scope_id. This means that all programs using IPv6 should be
5100 recompiled. Don't expect binary compatibility with previous glibc
5103 * various conversion modules for IBM character sets contributed by
5106 * IA-64 port by Jes Sorensen and HJ Lu.
5120 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
5122 * New xdr functions are added; some rpc functions are now 64bit clean.
5124 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
5126 * Fixed known incompatibilities with glibc 2.0.
5128 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
5130 * Optimized a number of functions (especially the ELF dynamic loader).
5132 * Update timezone data files.
5134 * lots of charmaps corrections
5136 * some new locale definitions and charmaps
5141 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
5142 conform to POSIX member type requirements. Symbol versions have been
5143 adjusted as needed within the library, and for direct use by applications,
5144 but there is potential for problems if third-party libraries use
5145 struct timeval as part of their interface. This does not present
5146 a problem for X and other "essential" system libraries.
5148 * An additional locale model to support C++ Standard Library locale
5149 model and probably more was implemented by Ulrich Drepper.
5151 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
5154 * Miles Bader provided the `argp' function family to support hierachical
5155 command line argument parsing, layered on top of getopt.
5157 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
5159 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
5162 * scanf recognizes the %a and %A format for scanning floating point numbers.
5164 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
5165 information and interfaces for the available integer types.
5167 * about 130 new math functions were added to implement the ISO C9x math
5170 * the new header <complex.h> contains definitions of the complex math
5171 functions from ISO C 9X.
5173 * the new header <tgmath.h> defines generic macros to use complex or
5174 real valued functions.
5176 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
5178 * Andreas Jaeger provided a test suite for the math library.
5180 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
5182 * Ulrich Drepper added character set conversion functions (iconv).
5184 * Optimized string functions have been added.
5186 * The localedata addon is now part of glibc.
5188 * An implementation of profiling shared libraries was added by Ulrich Drepper.
5190 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
5191 daemon for NSS (nscd).
5193 Missing a better place here are some numbers on improvements. Under
5194 Linux 2.1.125 un-tar-ing the kernel sources takes
5198 using local files 12.19s 6.88s 22.91s
5200 using NIS 13.92s 8.91s 26.34s
5202 using NIS & nscd 10.37s 7.34s 25.30s
5204 using NIS+ 27.57s 30.37s 640.46s
5206 using NIS+ & nscd 10.25s 7.83s 26.51s
5208 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5210 Keep in mind that non-namelookup related operations dominate above times.
5211 It was just a common complain that using NIS+ unpacking the kernel is
5214 [1] The old nscd implementation is not available anymore since it was
5215 distributed with glibc up to version 2.0.98 and thus is now replaced.
5217 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5219 * Mark Kettenis provided a Hesiod NSS module.
5221 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5222 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5224 * rcmd can now handle netgroups (Dick Streefland).
5226 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5229 * Support for the IPv6 protocol has been added to the socket API, as per the
5230 latest draft standards.
5232 * Support for Linux 2.2 has been added.
5234 * Interface changes relative to the latest 2.0.x release:
5235 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5236 addseverity NEW: Unix98
5237 alphasort64 NEW: LFS
5238 argp_err_exit_status NEW: argp, GNU ext
5239 argp_error NEW: argp, GNU ext
5240 argp_failure NEW: argp, GNU ext
5241 argp_help NEW: argp, GNU ext
5242 argp_parse NEW: argp, GNU ext
5243 argp_program_bug_address NEW: argp, GNU ext
5244 argp_program_version NEW: argp, GNU ext
5245 argp_program_version_hook NEW: argp, GNU ext
5246 argp_state_help NEW: argp, GNU ext
5247 argp_usage NEW: argp, GNU ext
5248 authdes_create NEW: Secure RPC
5249 authdes_getucred NEW: Secure RPC
5250 authdes_pk_create NEW: Secure RPC
5251 backtrace NEW: GNU ext.
5252 backtrace_symbols NEW: GNU ext.
5253 backtrace_symbols_fd NEW: GNU ext.
5255 cacosf NEW: ISO C 9x
5256 cacosh NEW: ISO C 9x
5257 cacoshf NEW: ISO C 9x
5258 cacoshl NEW: ISO C 9x
5259 cacosl NEW: ISO C 9x
5266 casinf NEW: ISO C 9x
5267 casinh NEW: ISO C 9x
5268 casinhf NEW: ISO C 9x
5269 casinhl NEW: ISO C 9x
5270 casinl NEW: ISO C 9x
5272 catanf NEW: ISO C 9x
5273 catanh NEW: ISO C 9x
5274 catanhf NEW: ISO C 9x
5275 catanhl NEW: ISO C 9x
5276 catanl NEW: ISO C 9x
5277 cbc_crypt NEW: Secure RPC
5281 ccoshf NEW: ISO C 9x
5282 ccoshl NEW: ISO C 9x
5288 cimagf NEW: ISO C 9x
5289 cimagl NEW: ISO C 9x
5290 clearerr_locked REMOVED
5291 clntunix_create NEW: sunrpc ext
5293 clog10 NEW: ISO C 9x
5294 clog10f NEW: ISO C 9x
5295 clog10l NEW: ISO C 9x
5305 cprojf NEW: ISO C 9x
5306 cprojl NEW: ISO C 9x
5308 crealf NEW: ISO C 9x
5309 creall NEW: ISO C 9x
5314 csinhf NEW: ISO C 9x
5315 csinhl NEW: ISO C 9x
5318 csqrtf NEW: ISO C 9x
5319 csqrtl NEW: ISO C 9x
5323 ctanhf NEW: ISO C 9x
5324 ctanhl NEW: ISO C 9x
5326 des_setparity NEW: Secure RPC
5327 ecb_crypt NEW: Secure RPC
5328 endutxent NEW: Unix98
5330 exp10f NEW: ISO C 9x
5331 exp10l NEW: ISO C 9x
5335 fattach NEW: STREAMS
5336 fdetach NEW: STREAMS
5340 feclearexcept NEW: ISO C 9x
5341 fegetenv NEW: ISO C 9x
5342 fegetexceptflag NEW: ISO C 9x
5343 fegetround NEW: ISO C 9x
5344 feholdexcept NEW: ISO C 9x
5346 feraiseexcept NEW: ISO C 9x
5347 ferror_locked REMOVED
5348 fesetenv NEW: ISO C 9x
5349 fesetexceptflag NEW: ISO C 9x
5350 fesetround NEW: ISO C 9x
5351 fetestexcept NEW: ISO C 9x
5352 feupdateenv NEW: ISO C 9x
5353 fflush_locked REMOVED
5357 fgets_unlocked NEW: GNU ext.
5358 fileno_locked REMOVED
5370 fputc_locked REMOVED
5371 fputs_unlocked NEW: GNU ext.
5372 fread_unlocked NEW: GNU ext.
5377 fstatvfs NEW: Unix98
5381 ftruncate64 NEW: LFS
5383 fwrite_unlocked NEW: GNU ext.
5384 gai_strerror NEW: IPv6
5388 getchar_locked REMOVED
5390 getdate_err NEW: Unix98
5391 getdate_r NEW: GNU ext.
5393 getnameinfo NEW: IPv6
5394 getnetname NEW: Secure RPC
5395 getpmsg NEW: STREAMS
5396 getpt NEW: Unix98 PTY
5397 getrlimit64 NEW: LFS
5398 getutxent NEW: Unix98
5399 getutxid NEW: Unix98
5400 getutxline NEW: Unix98
5401 glob64 NEW: GNU ext.
5402 globfree64 NEW: GNU ext.
5403 gnu_get_libc_release NEW: GNU ext.
5404 gnu_get_libc_version NEW: GNU ext.
5405 grantpt NEW: Unix98 PTY
5406 host2netname NEW: Secure RPC
5408 iconv_close NEW: iconv
5409 iconv_open NEW: iconv
5410 if_freenameindex NEW: IPv6
5411 if_indextoname NEW: IPv6
5412 if_nameindex NEW: IPv6
5413 if_nametoindex NEW: IPv6
5414 in6addr_any NEW: IPv6
5415 in6addr_loopback NEW: IPv6
5416 inet6_isipv4mapped NEW: IPv6
5417 isastream NEW: STREAMS
5418 iswblank NEW: GNU ext.
5419 key_decryptsession NEW: Secure RPC
5420 key_decryptsession_pk NEW: Secure RPC
5421 key_encryptsession NEW: Secure RPC
5422 key_encryptsession_pk NEW: Secure RPC
5423 key_gendes NEW: Secure RPC
5424 key_get_conv NEW: Secure RPC
5425 key_secretkey_is_set NEW: Secure RPC
5426 key_setnet NEW: Secure RPC
5427 key_setsecret NEW: Secure RPC
5428 llrint NEW: ISO C 9x
5429 llrintf NEW: ISO C 9x
5430 llrintl NEW: ISO C 9x
5431 llround NEW: ISO C 9x
5432 llroundf NEW: ISO C 9x
5433 llroundl NEW: ISO C 9x
5438 lrintf NEW: ISO C 9x
5439 lrintl NEW: ISO C 9x
5440 lround NEW: ISO C 9x
5441 lroundf NEW: ISO C 9x
5442 lroundl NEW: ISO C 9x
5444 makecontext NEW: Unix98
5445 mempcpy NEW: GNU ext.
5448 modify_ldt NEW: kernel
5452 nearbyint NEW: ISO C 9x
5453 nearbyintf NEW: ISO C 9x
5454 nearbyintl NEW: ISO C 9x
5455 netname2host NEW: Secure RPC
5456 netname2user NEW: Secure RPC
5457 nexttoward NEW: ISO C 9x
5458 nexttowardf NEW: ISO C 9x
5459 nexttowardl NEW: ISO C 9x
5463 passwd2des NEW: Secure RPC
5465 pow10f NEW: GNU ext.
5466 pow10l NEW: GNU ext.
5469 printf_size NEW: GNU ext.
5470 printf_size_info NEW: GNU ext.
5471 profil_counter REMOVED
5472 pthread_mutexattr_getkind_np REPLACED
5473 pthread_mutexattr_setkind_np REPLACED
5474 ptsname NEW: Unix98 PTY
5475 ptsname_r NEW: Unix98 PTY
5477 putchar_locked REMOVED
5478 putgrent NEW: GNU ext.
5480 putpmsg NEW: STREAMS
5481 pututxline NEW: Unix98
5485 readdir64_r NEW: LFS
5486 remquo NEW: ISO C 9x
5487 remquof NEW: ISO C 9x
5488 remquol NEW: ISO C 9x
5490 roundf NEW: ISO C 9x
5491 roundl NEW: ISO C 9x
5493 scalbln NEW: ISO C 9x
5494 scalblnf NEW: ISO C 9x
5495 scalblnl NEW: ISO C 9x
5497 sendfile NEW: kernel
5498 setcontext NEW: Unix98
5499 setrlimit64 NEW: LFS
5500 setutxent NEW: Unix98
5502 sigignore NEW: Unix98
5503 sigqueue NEW: POSIX.1b
5504 sigrelse NEW: Unix98
5505 sigset NEW: POSIX.1b
5506 sigtimedwait NEW: POSIX.1b
5507 sigwaitinfo NEW: POSIX.1b
5508 sincos NEW: GNU ext.
5509 sincosf NEW: GNU ext.
5510 sincosl NEW: GNU ext.
5514 strcasestr NEW: GNU ext.
5515 strtoimax NEW: ISO C 9x
5516 strtoumax NEW: ISO C 9x
5517 strverscmp NEW: GNU ext.
5518 svcauthdes_stats NEW: Secure RPC
5519 svcunix_create NEW: sunrpc etx
5520 svcunixfd_create NEW: sunrpc ext
5521 swapcontext NEW: Unix98
5522 tcgetsid NEW: Unix98 PTY
5523 tdestroy NEW: GNU ext.
5524 tgamma NEW: ISO C 9x
5525 tgammaf NEW: ISO C 9x
5526 tgammal NEW: ISO C 9x
5530 truncf NEW: ISO C 9x
5531 truncl NEW: ISO C 9x
5533 unlockpt NEW: Unix98 PTY
5534 updwtmpx NEW: Unix98
5535 user2netname NEW: Secure RPC
5536 utmpxname NEW: Unix98
5537 versionsort NEW: GNU ext.
5538 versionsort64 NEW: GNU ext.
5540 wcscasecmp NEW: GNU ext.
5541 wcsncasecmp NEW: GNU ext.
5542 wcsnlen NEW: GNU ext.
5543 wcstoimax NEW: ISO C 9x
5544 wcstoll NEW: ISO C 9x
5545 wcstoull NEW: ISO C 9x
5546 wcstoumax NEW: ISO C 9x
5548 wordexp NEW: POSIX.2
5549 wordfree NEW: POSIX.2
5550 write_profiling REMOVED
5551 xdecrypt NEW: Secure RPC
5552 xdr_authdes_cred NEW: Secure RPC
5553 xdr_authdes_verf NEW: Secure RPC
5554 xdr_cryptkeyarg NEW: Secure RPC
5555 xdr_cryptkeyarg2 NEW: Secure RPC
5556 xdr_cryptkeyres NEW: Secure RPC
5557 xdr_getcredres NEW: Secure RPC
5558 xdr_key_netstarg NEW: Secure RPC
5559 xdr_key_netstres NEW: Secure RPC
5560 xdr_keybuf NEW: Secure RPC
5561 xdr_keystatus NEW: Secure RPC
5562 xdr_netnamestr NEW: Secure RPC
5563 xdr_sizeof NEW: Secure RPC
5564 xdr_unixcred NEW: sunrpc ext
5565 xencrypt NEW: Secure RPC
5566 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5577 * inet_ntoa is thread-safe
5579 * updwtmp is moved from libutil to libc
5581 * rewrite of cbrt function
5583 * update of timezone data
5597 * add atoll function
5599 * fix complex problems in Berkeley DB code
5601 * fix math functions
5605 * fixed lots of header problems (especially Linux/GNU specific)
5607 * dynamic loader preserves all registers
5609 * Roland McGrath provided support for handling of auxiliary objects in
5610 the ELF dynamic loader.
5612 * support for parallel builds is improved
5616 * GNU extensions are no longer declared by default. To enable them you
5617 must define the macro `_GNU_SOURCE' in your program or compile with
5620 * The library has changed from using GNU ld symbol aliases to using weak
5621 symbols where available. The ELF object file format supports weak
5622 symbols; GNU ld also supports weak symbols in the a.out format. (There
5623 is also now support for other GNU ld extensions in ELF. Use the
5624 `--with-elf' option to configure to indicate you have ELF, and
5625 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5626 of many files which contained only symbol aliases, reducing the size of
5627 the source and the compiled library; many other files were renamed to
5628 less cryptic names previously occupied by the symbol alias files.
5629 There is a new header file <elf.h> for programs which operate on
5630 files in the ELF format.
5632 * Converted to Autoconf version 2, so `configure' has more options.
5633 Run `configure --help' to see the details.
5635 * The library can now be configured to build profiling, highly-optimized
5636 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5637 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5638 `configure' enable building these extra libraries. The shared library is
5639 built by default when using both ELF and GNU ld. When shared libraries
5640 are enabled, the new library `-ldl' is available for arbitrary run-time
5641 loading of shared objects; its interface is defined in <dlfcn.h>. The
5642 new header file <link.h> gives access to the internals of the run-time
5643 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5644 application of same name on other systems and it provides information
5645 about dynamically linked binaries.
5647 * The C library now provides the run-time support code for profiling
5648 executables compiled with `-pg'. Programs can control the profiling code
5649 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5650 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5651 the support for this file format was contributed by David Mosberger-Tang.
5653 * The math code has been replaced with a math library based on fdlibm from
5654 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5655 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5656 functions. The math functions now reside in a separate library, so
5657 programs using them will need to use `-lm' their linking commands.
5659 * John C. Bowman contributed optimized ix87 assembler inline functions.
5661 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5662 mechanism similar to that found in Solaris 2. This is now used for the
5663 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5664 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5665 file controls what services are used for each individual database. This
5666 works by loading shared libraries with names specified in `nsswitch.conf',
5667 so service modules can be changed or added at any time without even
5668 relinking any program. Currently there are the file, db, and NIS based
5669 NSS services available.
5671 * The new functions `strtoq' and `strtouq' parse integer values from
5672 strings, like `strtol' and `strtoul', but they return `long long int' and
5673 `unsigned long long int' values, respectively (64-bit quantities).
5675 * The new functions `strtof' and `strtold' parse floating-point values from
5676 strings, like `strtod', but they return `float' and `long double' values,
5677 respectively (on some machines `double' and `long double' are the same).
5679 * Ulrich Drepper has contributed new implementations of the floating-point
5680 printing and reading code used in the `printf' family of functions and
5681 `strtod', `strtof', and `strtold'. These new functions are perfectly
5682 accurate, and much faster than the old ones.
5684 * The implementation of the POSIX locale model was completely rewritten by
5685 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5686 to compile the POSIX locale definition.
5688 * The former dummy implementations of the strcoll and strxfrm function are
5689 now replaced by fully functional code contributed by Ulrich Drepper. The
5690 collation information comes from the POSIX locale definitions.
5692 * The new header <langinfo.h> defines an interface for accessing
5693 various locale-dependent data (using the locale chosen with `setlocale').
5695 * Ulrich Drepper has contributed a new suite of functions for operation on
5696 wide-character and multibyte-character strings, in <wchar.h>;
5697 and classification and case conversion of wide characters, in <wctype.h>.
5698 These new functions are conforming to the ISO C, Amendement 1 specification.
5700 * There is now a second implementation of the standard I/O library available.
5701 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5702 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5704 * You can now use positional parameter specifications in format strings
5705 for the `printf' and `scanf' families of functions. For example,
5706 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5707 ``Number 6, Mr Jones''. This is mainly useful when providing different
5708 format strings for different languages, whose grammars may dictate
5709 different orderings of the values being printed. To support this
5710 feature, the interface for `register_printf_handler' has changed; see
5711 the header file <printf.h> for details.
5713 * The `printf' and `scanf' families of functions now understand a new
5714 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5715 to group numbers as indicated by the locale; for `scanf' and friends, this
5716 says to accept as valid only a number with all the proper grouping
5717 separators in the right places. In the default "C" locale, numbers are
5718 not grouped; but locales for specific countries will define the usual
5719 conventions (i.e. separate thousands with `,' in the US locale).
5721 * The pgrp functions have been regularized, slightly incompatibly but much
5722 less confusingly. The core functions are now `getpgid' and `setpgid',
5723 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5724 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5725 provided for compatibility. There is no longer an incompatible `getpgrp'
5726 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5728 * The new header file <fts.h> and suite of functions simplify programs that
5729 operate on directory trees. This code comes from 4.4 BSD.
5731 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5732 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5733 NSS scheme used in glibc.
5735 * There is a new malloc debugging hook `__memalign_hook'.
5737 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5738 `unsigned int' in <sys/types.h>. These are for compatibility only and
5739 their use is discouraged.
5741 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5742 done differently, so that it works even without GNU ld.
5744 * New function `euidaccess' checks allowed access to a file like `access',
5745 but using the effective IDs instead of the real IDs.
5747 * The time zone data files have been updated for the latest and greatest
5748 local time conventions of the countries of the world.
5750 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5753 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5754 for formatting floating-point numbers. They are provided only for
5755 compatibility; new programs should use `sprintf' instead. There are
5756 also equivalent function for the `long double' floating-point type and
5757 all functions also exist in a reentrant form.
5759 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5760 functions for maintaining the login-record files (primarily of use to
5761 system programs such as `login'), and convenient functions for
5762 allocating and initializing a pseudo-terminal (pty) device.
5764 * Ulrich Drepper has contributed new support for System V style
5765 shared memory and IPC on systems that support it.
5767 * Ulrich Drepper has contributed several miscellaneous new functions found
5768 in System V: The `hsearch' family of functions provide an effective
5769 implementation of hash tables; `a64l' and `l64a' provide a very simple
5770 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5773 * Ulrich Drepper has contributed new reentrant counterparts for the
5774 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5776 * Ulrich Drepper has contributed new, highly-optimized versions of several
5777 string functions for the i486/Pentium family of processors.
5779 * Ulrich Drepper has updated the Linux-specific code, based largely
5780 on work done in Hongjiu Lu's version of GNU libc for Linux.
5781 The GNU library now supports Linux versions 2.0.10 and later,
5782 using the ELF object file format (i[3456]86-*-linux).
5784 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5786 * David Mosberger-Tang and Richard Henderson have ported the C library
5787 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5788 dynamic linking support for ELF/Alpha.
5790 * Richard Henderson contributed several Alpha optimized assembler function
5791 for arithmetic and string handling.
5793 * Ulrich Drepper has contributed a new set of message catalog functions to
5794 support multiple languages using the <libintl.h> interface, for use with
5795 his new package GNU gettext. Translation volunteers have contributed
5796 catalogs of the library's messages in Spanish, German, and Korean.
5798 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5799 program and the `catgets' function for reading the catalog files it
5800 creates. (The <libintl.h> interface is preferred; we include the
5801 <nl_types.h> interface using `catgets' only for source compatibility with
5802 programs already written to use it.)
5804 * New header file <values.h> gives SVID-compatible names for <limits.h>
5807 * Various new macros, declarations, and small header files for compatibility
5810 * New function `group_member' is a convenient way to check if a process has
5811 a given effective group ID.
5813 * When using GCC 2.7 and later, the socket functions are now declared in a
5814 special way so that passing an argument of type `struct sockaddr_in *',
5815 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5816 `struct sockaddr *' type, does not generate a type-clash warning.
5818 * New function `error' declared in header file <error.h> is a convenient
5819 function for printing error messages and optionally exiting; this is the
5820 canonical function used in GNU programs. The new functions `err', `warn',
5821 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5822 doing the same thing.
5824 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5825 POSIX.2 `glob' function to do ~ and {...} expansion.
5827 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5828 `clearenv' which is used in POSIX.9 is also available.
5830 * New function `getsid' returns session ID number on systems that support it.
5832 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5833 files <db.h> and <mpool.h> provide a rich set of functions for several
5834 types of simple databases stored in memory and in files, and <ndbm.h> is
5835 an old `ndbm'-compatible interface using the `db' functions. Link with
5836 `-ldb' to get these functions.
5838 * New macro `strdupa' copies a string like `strdup', but uses local stack
5839 space from `alloca' instead of dynamic heap space from `malloc'.
5841 * New function `strnlen' is like `strlen' but searches only a given maximum
5842 number of characters for the null terminator. `stpncpy', `strndup' and
5843 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5846 * New function `statfs' in header <sys/statfs.h>.
5848 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5849 provide convenient functions for operating on blocks of null-terminated
5852 * A new suite of functions in <utmp.h> handle all the details of reading
5853 and writing the utmp file.
5855 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5858 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5859 completely POSIX compliant and also implemented the extended functionality
5860 to handle alternate digit representation and alternate era date formats.
5862 * Ulrich Drepper provided an implementation of the `strptime' function
5863 defined in XPG4.2 which transforms a string into a `struct tm' value.
5865 * Paul Eggert provided the tzselect shell script as part of the timezone
5866 code. The shell script makes it easy to select the correct timezone
5869 * The implementation of the malloc family of functions is completely replaced
5870 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5871 The implementation uses the mmap function (if available) and it is
5872 optimized for the use in multi threaded programs.
5874 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5875 functions. This new functionality is usable by specifying a special
5876 salt string and it is compatible with implementation on *BSD systems.
5878 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5879 `getsubopt' to handle second level command line options, `bsd_signal'
5880 to access BSD style `signal' functionality, the obsolete `regexp' style
5883 * the `lchown' function is available on system which support this
5886 * The implementation of the shadow password handling function was contributed
5889 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5891 * POSIX.1g support was added. The <sys/select.h> header is available,
5892 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5893 implementation of `getaddrinfo'.
5897 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5899 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5900 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5902 * The new function `daemon' from 4.4 BSD is useful for server programs that
5903 want to put themselves in the background.
5905 * Joel Sherrill has contributed support for several standalone boards that
5906 run without an operating system.
5908 * `printf', `scanf' and friends now accept a `q' type modifier for long
5909 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5911 * All of the code taken from BSD (notably most of the math and networking
5912 routines) has been updated from the BSD 4.4-Lite release.
5914 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5916 * The new functions `getdomainname' and `setdomainname' fetch or change the
5917 YP/NIS domain name. These are system calls which exist on systems which
5920 * The time zone data files have been updated for the latest international
5923 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5924 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5928 * The C library now includes support for Sun RPC, from Sun's free
5929 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5930 are included. (There is still no support for YP.)
5932 * Tom Quinn has contributed a port of the C library to SGI machines running
5933 Irix 4 (mips-sgi-irix4).
5935 * The new `lockf' function is a simplified interface to the locking
5936 facilities of `fcntl', included for compatibility.
5938 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5940 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5942 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5945 * The error message printed by `assert' for a failed assertion now includes
5946 the name of the program (if using GNU ld) and the name of the calling
5947 function (with versions of GCC that support this).
5949 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5951 * The library now includes the <sys/mman.h> header file and memory
5952 management functions `mmap', `munmap', `mprotect', `msync', and
5953 `madvise', on systems that support those facilities.
5955 * The interface for `mcheck' has changed slightly: the function called to
5956 abort the program when an allocation inconsistency is detected now takes
5957 an argument that indicates the type of failure. The new function
5958 `mprobe' lets you request a consistency check for a particular block at
5959 any time (checks are normally done only when you call `free' or `realloc'
5962 * It is now possible to easily cross-compile the C library, building on one
5963 system a library to run on another machine and/or operating system. All
5964 you need to do is set the variable `HOST_CC' in `configparms' to the
5965 native compiler for programs to run on the machine you are building on (a
5966 few generator programs are used on Unix systems); set `CC' to the
5969 * The new function `fexecve' (only implemented on the GNU system) executes
5970 a program file given a file descriptor already open on the file.
5974 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5975 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5977 * You can set the variable `libprefix' in `configparms' to specify a prefix
5978 to be prepended to installed library files; this makes it easy to install
5979 the GNU C library to be linked as `-lgnuc' or whatever.
5981 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5982 copies a limited number of characters from a string, and returns the
5983 address of the last character written.
5985 * You no longer need to check for whether the installed `stddef.h' is
5986 compatible with the GNU C library. configure now checks for you.
5988 * You can now define a per-stream `fileno' function to convert the
5989 stream's cookie into an integral file descriptor.
5991 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5992 allocates zero bytes of storage, and returns a unique pointer which
5993 you can pass to `realloc' or `free'. The behavior is undefined if
5994 you dereference this pointer.
5996 * The C library now runs on Sony NEWS m68k machines running either
5997 NewsOS 3 or NewsOS 4.
5999 * The new `syscall' function is a system-dependent primitive function
6000 for invoking system calls. It has the canonical behavior on Unix
6001 systems, including unreliable return values for some calls (such as
6002 `pipe', `fork' and `getppid').
6004 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
6005 to `EAGAIN', which is the preferred name. On systems whose kernels
6006 use two distinct codes, the C library now translates EWOULDBLOCK to
6007 EAGAIN in every system call function.
6011 * The GNU C Library Reference Manual is now distributed with the library.
6012 `make dvi' will produce a DVI file of the printed manual.
6013 `make info' will produce Info files that you can read on line using C-h i
6014 in Emacs or the `info' program.
6015 Please send comments on the manual to bug-glibc-manual@gnu.org.
6017 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
6019 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
6021 * Jason Merrill has contributed a port to the Sequent Symmetry running
6022 Dynix version 3 (i386-sequent-dynix).
6024 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
6025 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
6027 * New function `memory_warnings' lets you arrange to get warnings when
6028 malloc is running out of memory to allocate, like Emacs gives you.
6030 * The C library now contains the relocating allocator used in Emacs 19 for
6031 its editing buffers. This allocator (ralloc) minimizes allocation
6032 overhead and fragmentation by moving allocated regions around whenever it
6033 needs to. You always refer to a ralloc'd region with a "handle" (a
6034 pointer to a pointer--an object of type `void **').
6036 * There is a new `printf' format: `%m' gives you the string corresponding
6037 to the error code in `errno'.
6039 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
6040 or `%[' conversion, but instead of filling in a fixed-sized buffer you
6041 pass, the `a' modifier says to fill in a `char **' you pass with a
6044 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
6045 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
6046 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
6048 * `mkstemp' is a traditional Unix function to atomically create and open a
6049 uniquely-named temporary file.
6053 * The standard location for the file that says what the local timezone is
6054 has changed again. It is now `/usr/local/etc/localtime' (or more
6055 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
6057 * The distribution no longer contains any files with names longer than 14
6060 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
6061 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
6063 * New functions `ttyslot' and `syslog' from 4.4 BSD.
6067 * The configuration process has changed quite a bit. The `configure'
6068 script is now used just like the configuration scripts for other GNU
6069 packages. The `sysdeps' directory hierarchy is much rearranged.
6070 The file `INSTALL' explains the new scheme in detail.
6072 * The header files no longer need to be processed into ANSI C and
6073 traditional C versions. There is just one set of files to install, and
6074 it will work with ANSI or old C compilers (including `gcc -traditional').
6076 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
6077 MIPS DECStation running Ultrix 4.
6079 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
6080 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
6081 made itself into a shared library.
6083 * Yet further improved support for the i386, running 4.3 BSD-like systems
6084 (such as Mach 3 with the Unix single-server), or System V.
6086 * New function `strncasecmp' to do case-insensitive string comparison
6087 with limited length.
6089 * New function `strsep' is a reentrant alternative to `strtok'.
6091 * New functions `scandir' and `alphasort' for searching directories.
6093 * New function `setenv' is a better interface to `putenv'.
6095 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
6096 function for traversing a directory tree.
6098 * The GNU obstack package is now also part of the C library.
6099 The new function `open_obstack_stream' creates a stdio stream that
6100 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
6101 formatted output directly to an obstack.
6103 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
6104 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
6106 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
6108 * The new functions `strfry' and `memfrob' do mysterious and wonderful
6109 things to your strings.
6111 * There are some new test programs: test-fseek, testmb, and testrand.
6113 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
6114 These ports are not finished, but are a good starting place for really
6115 supporting those systems.
6117 * `/etc/localtime' is now the standard location for the file that says what
6118 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
6119 This follows the general principle that `/etc' is the place for all local
6120 configuration files.
6122 * The C library header files now use `extern "C"' when used by the C++
6123 compiler, so the C library should now work with C++ code.
6125 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
6126 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
6129 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
6130 function which uses the `merge sort' algorithm, and is said to be
6131 significantly faster than the old GNU `qsort' function. Merge sort is
6132 now the standard `qsort' function. The new algorithm can require a lot
6133 of temporary storage; so, the old sorting function is called when the
6134 required storage is not available.
6136 * The C library now includes Michael Glad's Ultra Fast Crypt, which
6137 provides the Unix `crypt' function, plus some other entry points.
6139 * The code and header files taken from 4.4 BSD have been updated with the
6140 latest files released from Berkeley.
6142 ----------------------------------------------------------------------
6143 Copyright information:
6145 Copyright (C) 1992-2020 Free Software Foundation, Inc.
6147 Permission is granted to anyone to make or distribute verbatim copies
6148 of this document as received, in any medium, provided that the
6149 copyright notice and this permission notice are preserved,
6150 thus giving the recipient permission to redistribute in turn.
6152 Permission is granted to distribute modified versions
6153 of this document, or of portions of it,
6154 under the above conditions, provided also that they
6155 carry prominent notices stating who last changed them.
6158 version-control: never