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 12.1.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.1.0, using
14 generator scripts contributed by Mike FABIAN (Red Hat).
16 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
18 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
19 DT_DEPAUDIT dynamic section entries of the main executable.
21 * powerpc64le supports IEEE128 long double libm/libc redirects when
22 using the -mabi=ieeelongdouble to compile C code on supported GCC
23 toolchains. It is recommended to use GCC 8 or newer when testing
26 * To help detect buffer overflows and other out-of-bounds accesses
27 several APIs have been annotated with GCC 'access' attribute. This
28 should help GCC 10 issue better warnings.
30 * On Linux, functions the pthread_attr_setsigmask_np and
31 pthread_attr_getsigmask_np have been added. They allow applications
32 to specify the signal mask of a thread created with pthread_create.
34 * Support for automatically registering threads with the Linux rseq
35 system call has been added. This system call is implemented starting
36 from Linux 4.18. The Restartable Sequences ABI accelerates user-space
37 operations on per-cpu data. It allows user-space to perform updates
38 on per-cpu data without requiring heavy-weight atomic operations.
39 Automatically registering threads allows all libraries, including libc,
40 to make immediate use of the rseq support by using the documented ABI.
41 The GNU C Library manual has details on integration of Restartable
44 * The GNU C Library now provides the header file <sys/single_threaded.h>
45 which declares the variable __libc_single_threaded. Applications are
46 encouraged to use this variable for single-thread optimizations,
47 instead of weak references to symbols historically defined in
50 Deprecated and removed features, and other changes affecting compatibility:
52 * The deprecated <sys/sysctl.h> header and the sysctl function have been
53 removed. To support old binaries, the sysctl function continues to
54 exist as a compatibility symbol (on those architectures which had it),
55 but always fails with ENOSYS. This reflects the removal of the system
56 call from all architectures, starting with Linux 5.5.
58 * The sstk function is no longer available to newly linked binaries.
59 Its implementation always returned with a failure, and the function
60 was not declared in any header file.
62 * The legacy signal handling functions siginterrupt, sigpause, sighold,
63 sigrelse, sigignore and sigset, and the sigmask macro have been
64 deprecated. Applications should use the sigsuspend, sigprocmask and
65 sigaction functions instead.
67 * ldconfig now defaults to the new format for ld.so.cache. glibc has
68 already supported this format for almost 20 years.
70 * The deprecated arrays sys_siglist, _sys_siglist, and sys_sigabbrev
71 are no longer available to newly linked binaries, and their declarations
72 have been removed from <string.h>. They are exported solely as
73 compatibility symbols to support old binaries. All programs should use
76 * The deprecated symbols sys_errlist, _sys_errlist, sys_nerr, and _sys_nerr
77 are no longer available to newly linked binaries, and their declarations
78 have been removed from from <stdio.h>. They are exported solely as
79 compatibility symbols to support old binaries. All programs should use
80 strerror or strerror_r instead.
82 * Both strerror and strerror_l now share the same internal buffer in the
83 calling thread, meaning that the returned string pointer may be invalided
84 or contents might be overwritten on subsequent calls in the same thread or
85 if the thread is terminated. It makes strerror MT-safe.
87 Changes to build and runtime requirements:
89 * powerpc64le requires GCC 7.4 or newer. This is required for supporting
90 long double redirects.
92 Security related changes:
94 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
95 corruption when they were passed a pseudo-zero argument. Reported by Guido
96 Vranken / ForAllSecure Mayhem.
98 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
99 out-of-bounds write when executed in a signal frame context.
101 CVE-2020-1752: A use-after-free vulnerability in the glob function when
102 expanding ~user has been fixed.
104 The following bugs are resolved with this release:
106 [The release manager will add the list generated by
107 scripts/list-fixed-bugs.py just before the release.]
113 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
114 enable features from the draft ISO C2X standard. Only some features from
115 this draft standard are supported by the GNU C Library, and as the draft
116 is under active development, the set of features enabled by this macro is
117 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
118 by compiling with "gcc -std=gnu2x".
120 * The <math.h> functions that round their results to a narrower type now
121 have corresponding type-generic macros in <tgmath.h>, as defined in TS
122 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
123 Clarification Request 13 to TS 18661-3.
125 * The function pthread_clockjoin_np has been added, enabling join with a
126 terminated thread with a specific clock. It allows waiting against
127 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
129 * New locale added: mnw_MM (Mon language spoken in Myanmar).
131 * The DNS stub resolver will optionally send the AD (authenticated data) bit
132 in queries if the trust-ad option is set via the options directive in
133 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
134 mode, the AD bit, as provided by the name server, is available to
135 applications which call res_search and related functions. In the default
136 mode, the AD bit is not set in queries, and it is automatically cleared in
137 responses, indicating a lack of DNSSEC validation. (Therefore, the name
138 servers and the network path to them are treated as untrusted.)
140 Deprecated and removed features, and other changes affecting compatibility:
142 * The totalorder and totalordermag functions, and the corresponding
143 functions for other floating-point types, now take pointer arguments to
144 avoid signaling NaNs possibly being converted to quiet NaNs in argument
145 passing. This is in accordance with the resolution of Clarification
146 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
147 floating-point arguments directly will continue to work.
149 * The obsolete function stime is no longer available to newly linked
150 binaries, and its declaration has been removed from <time.h>.
151 Programs that set the system time should use clock_settime instead.
153 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
154 in a future version of glibc. In this release, the header still exists
155 but calling ftime will cause a compiler warning. All programs should use
156 gettimeofday or clock_gettime instead.
158 * The gettimeofday function no longer reports information about a
159 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
160 many years, as it cannot handle the full complexity of the world's
161 timezones, but hitherto we have supported it on a best-effort basis.
162 Changes required to support 64-bit time_t on 32-bit architectures have
163 made this no longer practical.
165 As of this release, callers of gettimeofday with a non-null 'tzp' argument
166 should expect to receive a 'struct timezone' whose tz_minuteswest and
167 tz_dsttime fields are zero. (For efficiency reasons, this does not always
168 happen on a few Linux-based ports. This will be corrected in a future
171 All callers should supply a null pointer for the 'tzp' argument to
172 gettimeofday. For accurate information about the time zone associated
173 with the current time, use the localtime function.
175 gettimeofday itself is obsolescent according to POSIX. We have no plans
176 to remove access to this function, but portable programs should consider
177 using clock_gettime instead.
179 * The settimeofday function can still be used to set a system-wide time
180 zone when the operating system supports it. This is because the Linux
181 kernel reused the API, on some architectures, to describe a system-wide
182 time-zone-like offset between the software clock maintained by the kernel,
183 and the "RTC" clock that keeps time when the system is shut down.
185 However, to reduce the odds of this offset being set by accident,
186 settimeofday can no longer be used to set the time and the offset
187 simultaneously. If both of its two arguments are non-null, the call
188 will fail (setting errno to EINVAL).
190 Callers attempting to set this offset should also be prepared for the call
191 to fail and set errno to ENOSYS; this already happens on the Hurd and on
192 some Linux architectures. The Linux kernel maintainers are discussing a
193 more principled replacement for the reused API. After a replacement
194 becomes available, we will change settimeofday to fail with ENOSYS on all
195 platforms when its 'tzp' argument is not a null pointer.
197 settimeofday itself is obsolescent according to POSIX. Programs that set
198 the system time should use clock_settime and/or the adjtime family of
199 functions instead. We may cease to make settimeofday available to newly
200 linked binaries after there is a replacement for Linux's time-zone-like
203 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
204 the optional CAS instruction is implemented (for instance, LEON processors
205 are still supported, but SuperSPARC processors are not).
207 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
210 * If a lazy binding failure happens during dlopen, during the execution of
211 an ELF constructor, the process is now terminated. Previously, the
212 dynamic loader would return NULL from dlopen, with the lazy binding error
213 captured in a dlerror message. In general, this is unsafe because
214 resetting the stack in an arbitrary function call is not possible.
216 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
217 executable stack unless explicitly configured at build time to require
218 minimum kernel version 4.8 or newer. This is because executing
219 floating-point branches on a non-executable stack on Linux kernels prior to
220 4.8 can lead to application crashes for some MIPS configurations. While
221 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
222 expected to enable non-executable stack by default with PT_GNU_STACK by
223 default and is thus likely to trigger a crash on older kernels.
225 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
226 non-executable stack while dropping support for older kernels.
228 * System call wrappers for time system calls now use the new time64 system
229 calls when available. On 32-bit targets, these wrappers attempt to call
230 the new system calls first and fall back to the older 32-bit time system
231 calls if they are not present. This may cause issues in environments
232 that cannot handle unsupported system calls gracefully by returning
233 -ENOSYS. Seccomp sandboxes are affected by this issue.
235 Changes to build and runtime requirements:
237 * It is no longer necessary to have recent Linux kernel headers to build
238 working (non-stub) system call wrappers on all architectures except 64-bit
239 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
241 * The ChangeLog file is no longer present in the toplevel directory of the
242 source tree. ChangeLog files are located in the ChangeLog.old directory as
243 ChangeLog.N where the highest N has the latest entries.
245 Security related changes:
247 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
248 environment variable during program execution after a security
249 transition, allowing local attackers to restrict the possible mapping
250 addresses for loaded libraries and thus bypass ASLR for a setuid
251 program. Reported by Marcin Kościelnicki.
253 The following bugs are resolved with this release:
255 [12031] localedata: iconv -t ascii//translit with Greek characters
256 [15813] libc: Multiple issues in __gen_tempname
257 [17726] libc: [arm, sparc] profil_counter should be compat symbol
258 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
259 [19767] libc: vdso is not used with static linking
260 [19903] hurd: Shared mappings not being inherited by children processes
261 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
262 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
264 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
265 Symbols-A/B Unicode blocks
266 [23518] libc: Eliminate __libc_utmp_jump_table
267 [24026] malloc: malloc_info() returns wrong numbers
268 [24054] localedata: Many locales are missing date_fmt
269 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
270 [24304] dynamic-link: Lazy binding failure during ELF
271 constructors/destructors is not fatal
272 [24376] libc: RISC-V symbol size confusion with _start
273 [24682] localedata: zh_CN first weekday should be Monday per GB/T
275 [24824] libc: test-in-container does not install charmap files compatible
277 [24844] regex: regex bad pointer / leakage if malloc fails
278 [24867] malloc: Unintended malloc_info formatting changes
279 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
280 [24880] libc: login: utmp implementation uses struct flock with fcntl64
281 [24882] libc: login: pututline uses potentially outdated cache
282 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
283 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
285 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
287 [24930] dynamic-link: dlopen of PIE executable can result in
288 _dl_allocate_tls_init assertion failure
289 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
290 (stringop-overflow error)
291 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
292 functions other can lead to crashes
293 [24967] libc: jemalloc static linking causes runtime failure
294 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
296 [25035] libc: sbrk() failure handled poorly in tunables_strdup
297 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
298 [25097] libc: new -Warray-bounds with GCC 10
299 [25112] dynamic-link: dlopen must not make new objects accessible when it
300 still can fail with an error
301 [25139] localedata: Please add the new mnw_MM locale
302 [25149] regex: Array bounds violation in proceed_next_node
303 [25157] dynamic-link: Audit cookie for the dynamic loader is not
304 initialized correctly
305 [25189] libc: glibc's __glibc_has_include causes issues with clang
307 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
309 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
310 binaries (CVE-2019-19126)
311 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
313 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
315 [25232] string: <string.h> does not enable const correctness for strchr et
317 [25233] localedata: Consider "." as the thousands separator for sl_SI
319 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
320 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
321 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
323 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
324 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
326 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
327 (dl_initfirst) link map pointer
328 [25401] malloc: pvalloc must not have __attribute_alloc_size__
329 [25423] libc: Array overflow in backtrace on powerpc
330 [25425] network: Missing call to __resolv_context_put in
331 getaddrinfo.c:gethosts
338 * Unicode 12.1.0 Support: Character encoding, character type info, and
339 transliteration tables are all updated to Unicode 12.1.0, using
340 generator scripts contributed by Mike FABIAN (Red Hat).
342 * The dynamic linker accepts the --preload argument to preload shared
343 objects, in addition to the LD_PRELOAD environment variable.
345 * The twalk_r function has been added. It is similar to the existing
346 twalk function, but it passes an additional caller-supplied argument
347 to the callback function.
349 * On Linux, the getdents64, gettid, and tgkill functions have been added.
351 * Minguo (Republic of China) calendar support has been added as an
352 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
355 * The entry for the new Japanese era has been added for ja_JP locale.
357 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
358 pvalloc, memalign, and posix_memalign fail now with total object size
359 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
360 pointer subtraction within the allocated object, where results might
361 overflow the ptrdiff_t type.
363 * The dynamic linker no longer refuses to load objects which reference
364 versioned symbols whose implementation has moved to a different soname
365 since the object has been linked. The old error message, symbol
366 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
367 link time reference, is gone.
369 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
370 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
371 functions. These behave similarly to their "timed" equivalents, but also
372 accept a clockid_t parameter to determine which clock their timeout should
373 be measured against. All functions allow waiting against CLOCK_MONOTONIC
374 and CLOCK_REALTIME. The decision of which clock to be used is made at the
375 time of the wait (unlike with pthread_condattr_setclock, which requires
376 the clock choice at initialization time).
378 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
379 work, new resolvers can use a second argument which can be extended in
380 the future, currently it contains the AT_HWCAP2 value.
382 Deprecated and removed features, and other changes affecting compatibility:
384 * The copy_file_range function fails with ENOSYS if the kernel does not
385 support the system call of the same name. Previously, user space
386 emulation was performed, but its behavior did not match the kernel
387 behavior, which was deemed too confusing. Applications which use the
388 copy_file_range function can no longer rely on glibc to provide a fallback
389 on kernels that do not support the copy_file_range system call, and if
390 this function returns ENOSYS, they will need to use their own fallback.
391 Support for copy_file_range for most architectures was added in version
392 4.5 of the mainline Linux kernel.
394 * The functions clock_gettime, clock_getres, clock_settime,
395 clock_getcpuclockid, clock_nanosleep were removed from the librt library
396 for new applications (on architectures which had them). Instead, the
397 definitions in libc will be used automatically, which have been available
400 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
401 and <sys/stropts.h> have been removed.
403 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
404 resolver flag (deprecated in glibc 2.25) have been removed.
406 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
407 resolver have been removed from <resolv.h>.
409 * With --enable-bind-now, installed programs are now linked with the
412 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
413 configurations) has been removed, following the deprecation of this
414 subarchitecture in version 8 of GCC, and its removal in version 9.
416 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
417 header have been removed.
419 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
420 deprecated and will be removed from a future version of glibc.
421 Application should directly access /proc instead. For obtaining random
422 bits, the getentropy function can be used.
424 Changes to build and runtime requirements:
426 * GCC 6.2 or later is required to build the GNU C Library.
428 Older GCC versions and non-GNU compilers are still supported when
429 compiling programs that use the GNU C Library.
431 Security related changes:
433 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
434 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
435 has undefined behavior. On x32, the size_t argument may be passed
436 in the lower 32 bits of the 64-bit RDX register with non-zero upper
437 32 bits. When it happened with the sign bit of RDX register set,
438 memcmp gave the wrong result since it treated the size argument as
439 zero. Reported by H.J. Lu.
441 CVE-2019-9169: Attempted case-insensitive regular-expression match
442 via proceed_next_node in posix/regexec.c leads to heap-based buffer
443 over-read. Reported by Hongxu Chen.
445 The following bugs are resolved with this release:
447 [2872] locale: Transliteration Cyrillic -> ASCII fails
448 [6399] libc: gettid() should have a wrapper
449 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
450 [16976] glob: fnmatch unbounded stack VLA for collating symbols
451 [17396] localedata: globbing for locale by [[.collating-element.]]
452 [18035] dynamic-link: pldd does no longer work, enters infinite loop
453 [18465] malloc: memusagestat is built using system C library
454 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
455 invalid input drops valid char
456 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
457 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
458 [21897] localedata: Afar locales: Fix mon, abmon, and abday
459 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
460 [23352] malloc: __malloc_check_init still defined in public header
462 [23403] nptl: Wrong alignment of TLS variables
463 [23501] libc: nftw() doesn't return dangling symlink's inode
464 [23733] malloc: Check the count before calling tcache_get()
465 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
467 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
468 [23844] nptl: pthread_rwlock_trywrlock results in hang
469 [23983] argparse: Missing compat versions of argp_failure and argp_error
470 for long double = double
471 [23984] libc: Missing compat versions of err.h and error.h functions for
473 [23996] localedata: Dutch salutations
474 [24040] libc: riscv64: unterminated call chain in __thread_start
475 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
477 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
478 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
480 [24114] regex: regexec buffer read overrun in "grep -i
481 '\(\(\)*.\)*\(\)\(\)\1'"
482 [24122] libc: Segfaults if 0 returned from la_version
483 [24153] stdio: Some input functions do not react to stdin assignment
484 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
485 RDX is set) (CVE-2019-7309)
486 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
487 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
488 not the default "nor"
489 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
490 false positives, change to modern flexible array
491 [24180] nptl: pthread_mutex_trylock does not use the correct order of
492 instructions while maintaining the robust mutex list due to missing
494 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
495 unnecessary librt dependencies
496 [24200] localedata: Revert first_weekday removal in en_IE locale
497 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
498 [24215] nptl: pthread_timedjoin_np should be a cancellation point
499 [24216] malloc: Check for large bin list corruption when inserting
501 [24228] stdio: old x86 applications that use legacy libio crash on exit
502 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
504 [24293] localedata: Missing Minguo calendar support for TW locales
505 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
507 [24307] localedata: Update locale data to Unicode 12.0.0
508 [24323] dynamic-link: dlopen should not be able open PIE objects
509 [24335] build: "Obsolete types detected" with Linux 5.0 headers
510 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
512 [24370] localedata: Add lang_name for tt_RU locale
513 [24372] locale: Binary locale files are not architecture independent
514 [24394] time: strptime %Ey mis-parses final year of era
515 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
517 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
519 [24531] malloc: Malloc tunables give tcache assertion failures
520 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
522 [24535] localedata: Update locale data to Unicode 12.1.0
523 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
524 kernels and break testing
525 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
526 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
527 [-Werror=format-overflow=]
528 [24570] libc: alpha: compat msgctl uses __IPC_64
529 [24584] locale: Data race in __wcsmbs_clone_conv
530 [24588] stdio: Remove codecvt vtables from libio
531 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
533 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
534 [24632] stdio: Old binaries which use freopen with default stdio handles
536 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
538 [24652] localedata: szl_PL spelling correction
539 [24695] nss: nss_db: calling getpwent after endpwent crashes
540 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
541 in /etc/nsswitch.conf
542 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
543 [24740] libc: getdents64 type confusion
544 [24741] dynamic-link: ld.so should not require that a versioned symbol is
545 always implemented in the same library
546 [24744] libc: Remove copy_file_range emulation
547 [24757] malloc: memusagestat is linked against system libpthread
548 [24794] libc: Partial test suite run builds corrupt test-in-container
556 * The getcpu wrapper function has been added, which returns the currently
557 used CPU and NUMA node. This function is Linux-specific.
559 * A new convenience target has been added for distribution maintainers
560 to build and install all locales as directories with files. The new
561 target is run by issuing the following command in your build tree:
562 'make localedata/install-locale-files', with an optional DESTDIR
563 to set the install root if you wish to install into a non-default
566 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
568 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
569 for _GNU_SOURCE, to match BSD environments.
571 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
572 indicates that it will abort the transaction prior to entering the kernel
573 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
574 suspended, and this caused some undefined side-effects issues by aborting
575 transactions manually. Glibc avoided it by abort transactions manually on
576 each syscall, but it lead to performance issues on newer kernels where the
577 HTM state is saved and restore lazily (the state being saved even when the
578 process actually does not use HTM).
580 * The functions posix_spawn_file_actions_addchdir_np and
581 posix_spawn_file_actions_addfchdir_np have been added, enabling
582 posix_spawn and posix_spawnp to run the new process in a different
583 directory. These functions are GNU extensions. The function
584 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
587 * The popen and system do not run atfork handlers anymore (BZ#17490).
588 Although it is a possible POSIX violation, the POSIX rationale in
589 pthread_atfork documentation regarding atfork handlers is to handle
590 inconsistent mutex state after a fork call in a multi-threaded process.
591 In both popen and system there is no direct access to user-defined mutexes.
593 * Support for the C-SKY ABIV2 running on Linux has been added. This port
594 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
596 - C-SKY ABIV2 soft-float little-endian
597 - C-SKY ABIV2 hard-float little-endian
599 * strftime's default formatting of a locale's alternative year (%Ey)
600 has been changed to zero-pad the year to a minimum of two digits,
601 like "%y". This improves the display of Japanese era years during
602 the first nine years of a new era, and is expected to be harmless
603 for all other locales (only Japanese locales regularly have
604 alternative year numbers less than 10). Zero-padding can be
605 overridden with the '_' or '-' flags (which are GNU extensions).
607 * As a GNU extension, the '_' and '-' flags can now be applied to
608 "%EY" to control how the year number is formatted; they have the
609 same effect that they would on "%Ey".
611 Deprecated and removed features, and other changes affecting compatibility:
613 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
614 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
616 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
617 in <sys/procfs.h>, has been corrected to match the type actually used by
618 the Linux kernel. This affects the size and layout of that structure on
619 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
621 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
622 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
623 defined in <sys/procfs.h>, has been corrected to match the type actually
624 used by the Linux kernel. This affects the size and layout of those
627 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
628 meant to scan a string and allocate space for it with malloc, is now
629 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
630 defined. This extension conflicts with C99's use of '%a' to scan a
631 hexadecimal floating-point number, which is now available to programs
632 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
634 POSIX.1-2008 includes the feature of allocating a buffer for string input
635 with malloc, using the modifier letter 'm' instead. Programs using
636 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
637 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
638 C99 '%a' no longer need to avoid _GNU_SOURCE.
640 GCC's -Wformat warnings can detect most uses of this extension, as long
641 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
642 __attribute__ ((format (scanf, ...))).
644 Changes to build and runtime requirements:
646 * Python 3.4 or later is required to build the GNU C Library.
648 * On most architectures, GCC 5 or later is required to build the GNU C
649 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
651 Older GCC versions and non-GNU compilers are still supported when
652 compiling programs that use the GNU C Library.
654 Security related changes:
656 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
657 denial of service due to resource exhaustion when processing getaddrinfo
658 calls with crafted host names. Reported by Guido Vranken.
660 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
661 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
662 happened, accessing the 32-bit size_t value as the full 64-bit register
663 in the assembly string/memory functions would cause a buffer overflow.
666 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
667 addresses with arbitrary trailing characters, potentially leading to data
668 or command injection issues in applications.
670 The following bugs are resolved with this release:
672 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
673 [10496] localedata: 12h time representation in multiple locales faulty
674 [10797] localedata: it_IT locale numeric does not have a separator for
676 [11319] libc: dprintf doesn't handle errors properly
677 [16346] time: mktime: potentially unsafe use of localtime_offset
678 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
680 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
681 posix_spawn_file_actions_addfchdir_np
682 [17426] localedata: Indian locales: set the correct date format
683 [17490] stdio: popen should not invoke atfork handlers
684 [17783] libc: TIOCSER_TEMT conditions inconsistent
685 [18040] regex: use-after-free in regexec/get_subexp
686 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
687 [20018] network: getaddrinfo should reject IP addresses with trailing
688 characters (CVE-2016-10739)
689 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
690 [20271] libc: Missing "\n" in __libc_fatal calls
691 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
692 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
693 pointer argument is non-NULL
694 [21037] stdio: open_memstream and freopen
695 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
696 [21716] time: Crash in glibc's mktime in low-memory situations
697 [22834] stdio: Subprocess forked by popen may crash in Linux when
698 multithreads call popen
699 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
700 and pthread_create fails.
701 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
702 [23125] libc: riscv64: endless loop when throwing an exception from a
704 [23275] nptl: Race in pthread_mutex_lock while promoting to
705 PTHREAD_MUTEX_ELISION_NP.
706 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
708 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
710 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
712 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
713 [23509] dynamic-link: CET enabled glibc is incompatible with the older
715 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
716 [23521] nss: get_next_alias nss_files file stream leak
717 [23538] nptl: Hang in pthread_cond_broadcast
718 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
719 [23578] regex: Invalid memory access if regex pattern contains NUL byte
720 [23579] libc: Errors misreported in preadv2
721 [23597] build: support/test-container.c doesn't work with different
723 [23603] time: mktime signed integer overflow on large timestamps
724 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
725 [23614] libc: powerpc: missing CFI register information in __mpn_*
727 [23637] string: Generic strstr/strcasestr fails with huge needles
728 [23640] libc: no way to easily clear FD_CLOEXEC in
729 posix_spawn_file_actions_adddup2()
730 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
732 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
734 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
735 [23689] libc: Bug in documentation for rusage.ru_ixrss in
736 bits/types/struct_rusage.h
737 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
739 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
741 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
742 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
743 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
745 [23724] localedata: Albanian date formats are incorrect
746 [23735] math: libnldbl_nonshared.a references internal libm symbols
747 [23740] localedata: kl_GL: Month names and date formats need update
748 [23744] regex: regex refactorings to remove BE, avoid duplication
749 [23745] time: mktime fix for Gnulib + coreutils
750 [23758] time: Improve the width of alternate representation for year in
752 [23783] libc: [mips] Missing CMSPAR bits/termios.h
753 [23789] time: mktime does not set errno on failure
754 [23791] localedata: Wrong monetary format for ca_ES locale
755 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
756 [23794] locale: c16rtomb does not handle surrogate pairs
757 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
758 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
759 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
760 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
761 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
762 [23862] libc: [sh] missing kernel-features.h undefines
763 [23864] libc: [riscv] missing kernel-features.h undefines
764 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
765 [23907] malloc: Incorrect double-free malloc tcache check disregards
767 [23913] libc: off-by-one in function maybe_script_execute in
768 sysdeps/posix/spawni.c
769 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
770 [23923] locale: Add --no-hard-links option to localedef
771 [23927] network: Linux if_nametoindex() does not close descriptor
773 [23961] math: powf can overflow to inf without setting errno in non-
774 nearest rounding mode
775 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
776 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
777 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
778 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
779 [24011] localedata: Fixed small type in comment for locale bs_BA
780 [24018] libc: gettext() may return NULL
781 [24022] build: riscv build failure with Linux kernel 4.20-rc7
782 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
783 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
785 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
786 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
788 [24046] localedata: en_US locale doesn't define date_fmt
789 [24063] manual: @var{errno} should be @code{errno}
790 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
791 [24088] libc: VSCR field is not being correctly read in ucontext_t on
793 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
795 [24097] string: Can't use 64-bit register for size_t in assembly codes for
797 [24110] hurd: SS_DISABLE never set in stack_t value returned by
799 [24112] network: Do not send DNS queries for non-host names (where all
800 answers will be rejected)
801 [24130] libc: alpha __remqu corrupts $f3 register
808 * The localization data for ISO 14651 is updated to match the 2016
809 Edition 4 release of the standard, this matches data provided by
810 Unicode 9.0.0. This update introduces significant improvements to the
811 collation of Unicode characters. This release deviates slightly from
812 the standard in that the collation element ordering for lowercase and
813 uppercase LATIN script characters is adjusted to ensure that regular
814 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
815 is not matched by [a-z]. With the update many locales have been
816 updated to take advantage of the new collation information. The new
817 collation information has increased the size of the compiled locale
818 archive or binary locales.
820 * The GNU C Library can now be compiled with support for Intel CET, AKA
821 Intel Control-flow Enforcement Technology. When the library is built
822 with --enable-cet, the resulting glibc is protected with indirect
823 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
824 compatible with all existing executables and shared libraries. This
825 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
826 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
827 capable of multi-byte NOPs, like x86-64 processors as well as Intel
828 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
829 x86_64 and x32 on non-CET processors. --enable-cet has been tested
830 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
833 * The GNU C Library now has correct support for ABSOLUTE symbols
834 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
835 relocated incorrectly or in some cases discarded. The GNU linker can
836 make use of the newer semantics, but it must communicate it to the
837 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
838 field) to indicate such support is required.
840 * Unicode 11.0.0 Support: Character encoding, character type info, and
841 transliteration tables are all updated to Unicode 11.0.0, using
842 generator scripts contributed by Mike FABIAN (Red Hat).
844 * <math.h> functions that round their results to a narrower type are added
845 from TS 18661-1:2014 and TS 18661-3:2015:
847 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
850 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
853 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
856 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
859 * Two grammatical forms of month names are now supported for the following
860 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
861 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
862 support two grammatical forms in abbreviated month names: Catalan, Greek,
865 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
866 include the support for two grammatical forms of month names.
868 * Building and running on GNU/Hurd systems now works without out-of-tree
871 * The renameat2 function has been added, a variant of the renameat function
872 which has a flags argument. If the flags are zero, the renameat2 function
873 acts like renameat. If the flag is not zero and there is no kernel
874 support for renameat2, the function will fail with an errno value of
875 EINVAL. This is different from the existing gnulib function renameatu,
876 which performs a plain rename operation in case of a RENAME_NOREPLACE
877 flags and a non-existing destination (and therefore has a race condition
878 that can clobber the destination inadvertently).
880 * The statx function has been added, a variant of the fstatat64
881 function with an additional flags argument. If there is no direct
882 kernel support for statx, glibc provides basic stat support based on
883 the fstatat64 function.
885 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
886 library if installed. libidn2 version 2.0.5 or later is recommended. If
887 libidn2 is not available, internationalized domain names are not encoded
888 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
889 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
890 with an encoding error.) Flags which used to change the IDN encoding and
891 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
892 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
893 deprecated. They no longer have any effect.
895 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
896 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
897 range of ELF gABI expressions including such constructs as
898 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
899 have been further restricted, and where in the past a dynamic string
900 token sequence may have been interpreted as a literal string it will
901 now cause a load failure. These load failures were always considered
902 unspecified behaviour from the perspective of the dynamic loader, and
903 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
904 results in a load failure now.
906 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
907 implementation includes all the standard functions provided by
910 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
911 thrd_detach, thrd_exit, and thrd_join for thread management.
913 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
914 mtx_destroy for mutual exclusion.
916 - call_once for function call synchronization.
918 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
919 cnd_wait for conditional variables.
921 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
923 Application developers must link against libpthread to use ISO C threads.
925 Deprecated and removed features, and other changes affecting compatibility:
927 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
928 installed. Software that was using either header should be updated to
929 use standard <stdio.h> interfaces instead.
931 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
932 This was never required by the C standard, and the macros just expanded
933 to call alternative names for the same functions. If you hoped getc and
934 putc would provide performance improvements over fgetc and fputc, instead
935 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
936 necessary, flockfile and funlockfile.
938 * All stdio functions now treat end-of-file as a sticky condition. If you
939 read from a file until EOF, and then the file is enlarged by another
940 process, you must call clearerr or another function with the same effect
941 (e.g. fseek, rewind) before you can read the additional data. This
942 corrects a longstanding C99 conformance bug. It is most likely to affect
943 programs that use stdio to read interactive input from a terminal.
946 * The macros 'major', 'minor', and 'makedev' are now only available from
947 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
948 headers that happen to include <sys/types.h>. These macros are rarely
949 used, not part of POSIX nor XSI, and their names frequently collide with
950 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
953 <sys/sysmacros.h> is a GNU extension. Portable programs that require
954 these macros should first include <sys/types.h>, and then include
955 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
957 * The tilegx*-*-linux-gnu configurations are no longer supported.
959 * The obsolete function ustat is no longer available to newly linked
960 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
961 function has been deprecated in favor of fstatfs and statfs.
963 * The obsolete function nfsservctl is no longer available to newly linked
964 binaries. This function was specific to systems using the Linux kernel
965 and could not usefully be used with the GNU C Library on systems with
966 version 3.1 or later of the Linux kernel.
968 * The obsolete function name llseek is no longer available to newly linked
969 binaries. This function was specific to systems using the Linux kernel
970 and was not declared in a header. Programs should use the lseek64 name
971 for this function instead.
973 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
974 getaddrinfo and getnameinfo functions have been deprecated. The behavior
975 previously selected by them is now always enabled.
977 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
978 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
979 restriction (rejecting '_' in host names, among other things) has been
980 removed, for increased compatibility with non-IDN name resolution.
982 * The fcntl function now have a Long File Support variant named fcntl64. It
983 is added to fix some Linux Open File Description (OFD) locks usage on non
984 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
985 fcntl and LFS support is handled transparently. Also for Linux, the OFD
986 locks act as a cancellation entrypoint.
988 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
989 ecb_crypt, and des_setparity are no longer available to newly linked
990 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
991 longer installed. These functions encrypted and decrypted data with the
992 DES block cipher, which is no longer considered secure. Software that
993 still uses these functions should switch to a modern cryptography library,
996 * Reflecting the removal of the encrypt and setkey functions above, the
997 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
998 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
1001 * The obsolete function fcrypt is no longer available to newly linked
1002 binaries. It was just another name for the standard function crypt,
1003 and it has not appeared in any header file in many years.
1005 * We have tentative plans to hand off maintenance of the passphrase-hashing
1006 library, libcrypt, to a separate development project that will, we hope,
1007 keep up better with new passphrase-hashing algorithms. We will continue
1008 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
1009 'crypt_r' should not need to change at all; however, distributions will
1010 need to install <crypt.h> and libcrypt from a separate project.
1012 In this release, if the configure option --disable-crypt is used, glibc
1013 will not install <crypt.h> or libcrypt, making room for the separate
1014 project's versions of these files. The plan is to make this the default
1015 behavior in a future release.
1017 Changes to build and runtime requirements:
1019 GNU make 4.0 or later is now required to build glibc.
1021 Security related changes:
1023 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
1024 been fixed by removing the glibc-internal IDNA implementation and using
1025 the system-provided libidn2 library instead. Originally reported by Hanno
1026 Böck and Christian Weisgerber.
1028 CVE-2017-18269: An SSE2-based memmove implementation for the i386
1029 architecture could corrupt memory. Reported by Max Horn.
1031 CVE-2018-11236: Very long pathname arguments to realpath function could
1032 result in an integer overflow and buffer overflow. Reported by Alexey
1035 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
1036 architecture could write beyond the target buffer, resulting in a buffer
1037 overflow. Reported by Andreas Schwab.
1039 The following bugs are resolved with this release:
1041 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
1042 [6889] manual: 'PWD' mentioned but not specified
1043 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
1044 when __WORDSIZE != 64
1045 [13762] regex: re_search etc. should return -2 on memory exhaustion
1046 [13888] build: /tmp usage during testing
1047 [13932] math: dbl-64 pow unexpectedly slow for some inputs
1048 [14092] nptl: Support C11 threads
1049 [14095] localedata: Review / update collation data from Unicode / ISO
1051 [14508] libc: -Wformat warnings
1052 [14553] libc: Namespace pollution loff_t in sys/types.h
1053 [14890] libc: Make NT_PRFPREG canonical.
1054 [15105] libc: Extra PLT references with -Os
1055 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
1057 [16335] manual: Feature test macro documentation incomplete and out of
1059 [16552] libc: Unify umount implementations in terms of umount2
1060 [17082] libc: htons et al.: statement-expressions prevent use on global
1061 scope with -O1 and higher
1062 [17343] libc: Signed integer overflow in /stdlib/random_r.c
1063 [17438] localedata: pt_BR: wrong d_fmt delimiter
1064 [17662] libc: please implement binding for the new renameat2 syscall
1065 [17721] libc: __restrict defined as /* Ignore */ even in c11
1066 [17979] libc: inconsistency between uchar.h and stdint.h
1067 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1068 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1069 horrible machine code)
1070 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1072 [18471] libc: llseek should be a compat symbol
1073 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1075 [18991] nss: nss_files skips large entry in database
1076 [19239] libc: Including stdlib.h ends up with macros major and minor being
1078 [19463] libc: linknamespace failures when compiled with -Os
1079 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1080 [19527] locale: Normalized charset name not recognized by setlocale
1081 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1082 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1084 [19728] network: out of bounds stack read in libidn function
1085 idna_to_ascii_4i (CVE-2016-6261)
1086 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1087 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1088 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1090 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1091 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1092 [20419] dynamic-link: files with large allocated notes crash in
1094 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1095 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1096 [20980] manual: CFLAGS environment variable replaces vital options
1097 [21163] regex: Assertion failure in pop_fail_stack when executing a
1098 malformed regexp (CVE-2015-8985)
1099 [21234] manual: use of CFLAGS makes glibc detect no optimization
1100 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1101 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1102 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1103 [21508] locale: intl/tst-gettext failure with latest msgfmt
1104 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1105 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1106 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1108 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1110 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1111 [22247] network: Integer overflow in the decode_digit function in
1112 puny_decode.c in libidn (CVE-2017-14062)
1113 [22342] nscd: NSCD not properly caching netgroup
1114 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1115 [22550] localedata: es_ES locale (and other es_* locales): collation
1116 should treat ñ as a primary different character, sync the collation
1117 for Spanish with CLDR
1118 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1119 by gcc configured with --enable-default-pie
1120 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1121 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1122 crossing 2GB threshold (CVE-2017-18269)
1123 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1125 [22735] time: Misleading typo in time.h source comment regarding
1127 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1128 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1129 `__assert_perror_fail ()' to `__assert_fail_base ()'
1130 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1132 [22786] libc: Stack buffer overflow in realpath() if input size is close
1133 to SSIZE_MAX (CVE-2018-11236)
1134 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1135 through an absolute DT_NEEDED path
1136 [22792] build: tcb-offsets.h dependency dropped
1137 [22797] libc: pkey_get() uses non-reserved name of argument
1138 [22807] libc: PTRACE_* constants missing for powerpc
1139 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1140 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1141 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1142 [22848] localedata: ca_ES: update date definitions from CLDR
1143 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1144 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1145 [22896] localedata: Update locale data for an_ES
1146 [22902] math: float128 test failures with GCC 8
1147 [22918] libc: multiple common of `__nss_shadow_database'
1148 [22919] libc: sparc32: backtrace yields infinite backtrace with
1150 [22926] libc: FTBFS on powerpcspe
1151 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1153 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1154 [22947] libc: FAIL: misc/tst-preadvwritev2
1155 [22963] localedata: cs_CZ: Add alternative month names
1156 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1157 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1158 [22998] dynamic-link: execstack tests are disabled when SELinux is
1160 [23005] network: Crash in __res_context_send after memory allocation
1162 [23007] math: strtod cannot handle -nan
1163 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1164 [23036] regex: regex equivalence class regression
1165 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1166 [23069] libc: sigaction broken on riscv64-linux-gnu
1167 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1168 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1169 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1170 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1171 and libc build with -Os)
1172 [23140] localedata: More languages need two forms of month names
1173 [23145] libc: _init/_fini aren't marked as hidden
1174 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1175 [23171] math: C++ iseqsig for long double converts arguments to double
1176 [23178] nscd: sudo will fail when it is run in concurrent with commands
1177 that changes /etc/passwd
1178 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1180 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1181 [23208] localedata: New locale - Lower Sorbian (dsb)
1182 [23233] regex: Memory leak in build_charclass_op function in file
1184 [23236] stdio: Harden function pointers in _IO_str_fields
1185 [23250] nptl: Offset of __private_ss differs from GCC
1186 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1187 -mtune=generic -mfpmath=sse
1188 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1190 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1191 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1193 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1194 [23277] math: nan function should not have const attribute
1195 [23279] math: scanf and strtod wrong for some hex floating-point
1196 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1198 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1199 [23303] build: undefined reference to symbol
1200 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1201 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1203 [23313] stdio: libio vtables validation and standard file object
1205 [23329] libc: The __libc_freeres infrastructure is not properly run across
1207 [23349] libc: Various glibc headers no longer compatible with
1209 [23351] malloc: Remove unused code related to heap dumps and malloc
1211 [23363] stdio: stdio-common/tst-printf.c has non-free license
1212 [23396] regex: Regex equivalence regression in single-byte locales
1213 [23422] localedata: oc_FR: More updates of locale data
1214 [23442] build: New warning with GCC 8
1215 [23448] libc: Out of bounds access in IBM-1390 converter
1216 [23456] libc: Wrong index_cpu_LZCNT
1217 [23458] build: tst-get-cpu-features-static isn't added to tests
1218 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1220 [23467] dynamic-link: x86/CET: A property note parser bug
1227 * The GNU C Library can now be compiled with support for building static
1228 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1229 executables are like static executables but can be loaded at any address
1230 and provide additional security hardening benefits at the cost of some
1231 memory and performance. When the library is built with --enable-static-pie
1232 the resulting libc.a is usable with GCC 8 and above to create static PIE
1233 executables using the GCC option '-static-pie'. This feature is currently
1234 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1235 aarch64 with binutils 2.30 or later.
1237 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1238 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1241 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1243 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1245 * In order to support faster and safer process termination the malloc API
1246 family of functions will no longer print a failure address and stack
1247 backtrace after detecting heap corruption. The goal is to minimize the
1248 amount of work done after corruption is detected and to avoid potential
1249 security issues in continued process execution. Reducing shutdown time
1250 leads to lower overall process restart latency, so there is benefit both
1251 from a security and performance perspective.
1253 * The abort function terminates the process immediately, without flushing
1254 stdio streams. Previous glibc versions used to flush streams, resulting
1255 in deadlocks and further data corruption. This change also affects
1256 process aborts as the result of assertion failures.
1258 * On platforms where long double has the IEEE binary128 format (aarch64,
1259 alpha, mips64, riscv, s390 and sparc), the math library now implements
1260 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1261 These are the same interfaces added in version 2.26 for some platforms where
1262 this format is supported but is not the format of long double.
1264 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1265 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1266 implements interfaces for that type, as defined by ISO/IEC TS
1267 18661-3:2015. These are corresponding interfaces to those supported for
1270 * The math library now implements interfaces for the _Float32, _Float64 and
1271 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1272 corresponding interfaces to those supported for _Float128.
1274 * glibc now implements the memfd_create and mlock2 functions on Linux.
1276 * Support for memory protection keys was added. The <sys/mman.h> header now
1277 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1280 * The copy_file_range function was added.
1282 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1284 * The ldconfig utility now processes `include' directives using the C/POSIX
1285 collation ordering. Previous glibc versions used locale-specific
1286 ordering, the change might break systems that relied on that.
1288 * Support for two grammatical forms of month names has been added.
1289 In a call to strftime, the "%B" and "%b" format specifiers will now
1290 produce the grammatical form required when the month is used as part
1291 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1292 required when the month is named by itself. For instance, in Greek
1293 and in many Slavic and Baltic languages, "%B" will produce the month
1294 in genitive case, and "%OB" will produce the month in nominative case.
1296 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1297 are all valid and will all accept any known form of month
1298 name---standalone or complete, abbreviated or full. In a call to
1299 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1300 the strings used by "%B" and "%b", respectively. New query
1301 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1302 used by "%OB" and "%Ob", respectively.
1304 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1305 define the strings for %OB and %Ob, respectively; these have the
1306 same syntax as "mon" and "abmon". These arrays are optional; if they
1307 are not provided then they have the same content as "mon" and "abmon",
1310 These features are provided for locales which define "alt_mon" and/or
1311 "ab_alt_mon" in their locale source data. This release includes such
1312 alternative month name data for the following languages: Belarusian,
1313 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1315 This feature is currently a GNU extension, but it is expected to
1316 be added to the next revision of POSIX, and it is also already
1317 available on some BSD-derived operating systems.
1319 This feature will cause existing statically compiled applications
1320 to fail to load locales and fall back to the builtin C/POSIX locales.
1321 See notes below for other changes affecting compatibility.
1323 * Support for the RISC-V ISA running on Linux has been added. This port
1324 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1325 for the following ISA and ABI pairs:
1331 Deprecated and removed features, and other changes affecting compatibility:
1333 * Statically compiled applications attempting to load locales compiled for the
1334 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1335 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1336 support for two grammatical forms of the month names, also extends the locale
1337 data binary format. Static applications needing locale support must be
1338 recompiled to match the runtime and data they are deployed with. In some
1339 distributions there is an upgrade window where dynamically linked applications
1340 may use a new library but the old locale data and also fall back to the
1341 builtin C/POSIX locales; restarting the application process is sufficient to
1344 * Support for statically linked applications which call dlopen is deprecated
1345 and will be removed in a future version of glibc. Applications which call
1346 dlopen need to be linked dynamically instead.
1348 * Support for old programs which use internal stdio data structures and
1349 functions is deprecated. This includes programs which use the C++ streams
1350 provided by libstdc++ in GCC 2.95. Programs which use the internal
1351 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1352 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1353 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1354 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1355 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1356 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1357 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1358 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1359 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1360 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1361 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1362 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1363 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1364 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1365 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1366 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1367 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1368 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1369 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1370 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1371 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1372 future version of glibc. Unlike other symbol removals, these old
1373 applications will not be supported using compatibility symbols.
1375 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1376 defined by <sys/ptrace.h>.
1378 * libm no longer supports SVID error handling (calling a user-provided
1379 matherr function on error) or the _LIB_VERSION variable to control error
1380 handling. (SVID error handling and the _LIB_VERSION variable still work
1381 for binaries linked against older versions of the GNU C Library.) The
1382 libieee.a library is no longer provided. math.h no longer defines struct
1383 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1384 TLOSS, PLOSS and HUGE.
1386 * The libm functions pow10, pow10f and pow10l are no longer supported for
1387 new programs. Programs should use the standard names exp10, exp10f and
1388 exp10l for these functions instead.
1390 * The mcontext_t type is no longer the same as struct sigcontext. On
1391 platforms where it was previously the same, this changes the C++ name
1392 mangling for interfaces involving this type.
1394 * The add-ons mechanism for building additional packages at the same time as
1395 glibc has been removed. The --enable-add-ons configure option is now
1398 * The --without-fp configure option is now ignored. Whether hardware
1399 floating-point instructions are used is now configured based on whether
1400 the compiler used at configure time (without any options implied by a
1401 --with-cpu= configure option) uses such instructions.
1403 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1404 the specified string can be parsed as a domain name.
1406 * In the malloc_info output, the <heap> element may contain another <aspace>
1407 element, "subheaps", which contains the number of sub-heaps.
1409 * The libresolv function p_secstodate is no longer supported for new
1412 * The tilepro-*-linux-gnu configuration is no longer supported.
1414 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1415 and will be removed in a future release. Software that is still using
1416 either header should be updated to use standard <stdio.h> interfaces
1419 libio.h was originally the header for a set of supported GNU extensions,
1420 but they have not been maintained as such in many years, they are now
1421 standing in the way of improvements to stdio, and we don't think there are
1422 any remaining external users. _G_config.h was never intended for public
1423 use, but predates the bits convention.
1425 Changes to build and runtime requirements:
1427 * bison version 2.7 or later is required to generate code in the 'intl'
1430 Security related changes:
1432 CVE-2009-5064: The ldd script would sometimes run the program under
1433 examination directly, without preventing code execution through the
1434 dynamic linker. (The glibc project disputes that this is a security
1435 vulnerability; only trusted binaries must be examined using the ldd
1438 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1439 suffered from a one-byte overflow during ~ operator processing (either
1440 on the stack or the heap, depending on the length of the user name).
1441 Reported by Tim Rühsen.
1443 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1444 would sometimes fail to free memory allocated during ~ operator
1445 processing, leading to a memory leak and, potentially, to a denial
1448 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1449 without GLOB_NOESCAPE, could write past the end of a buffer while
1450 unescaping user names. Reported by Tim Rühsen.
1452 CVE-2017-17426: The malloc function, when called with an object size near
1453 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1454 instead of NULL. This was a regression introduced with the new malloc
1455 thread cache in glibc 2.26. Reported by Iain Buclaw.
1457 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1458 to the allocation of too much memory. (This is not a security bug per se,
1459 it is mentioned here only because of the CVE assignment.) Reported by
1462 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1463 of the number of search path components. (This is not a security
1464 vulnerability per se because no trust boundary is crossed if the fix for
1465 CVE-2017-1000366 has been applied, but it is mentioned here only because
1466 of the CVE assignment.) Reported by Qualys.
1468 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1469 for AT_SECURE or SUID binaries could be used to load libraries from the
1472 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1473 succeeds without returning an absolute path due to unexpected behaviour
1474 of the Linux kernel getcwd syscall. Reported by halfdog.
1476 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1477 an object size near the value of SIZE_MAX, would return a pointer to a
1478 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1480 CVE-2018-6551: The malloc function, when called with an object size near
1481 the value of SIZE_MAX, would return a pointer to a buffer which is too
1482 small, instead of NULL.
1484 The following bugs are resolved with this release:
1486 [866] glob: glob should match dangling symlinks
1487 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1488 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1490 [5997] math: Very slow execution of sinf function
1491 [10580] localedata: hr_HR: updated locale
1492 [10871] locale: 'mon' array should contain both nominative and genitive
1494 [12349] localedata: eu_ES: incorrect thousands separator
1495 [13605] localedata: shn_MM: new Shan locale
1496 [13805] localedata: ru_RU: currency should use ',' as radix point
1497 [13953] localedata: km_KH: locale update
1498 [13994] localedata: mjw_IN: new locale
1499 [14121] build: make writes .mo files in po directory
1500 [14333] libc: Fix the race between atexit() and exit()
1501 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1502 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1504 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1505 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1506 width Latin characters
1507 [15332] localedata: es_CU: locale update
1508 [15436] stdio: Don't close or flush stdio streams on abort
1509 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1511 [16148] localedata: ca_ES: incorrect thousands separator
1512 [16750] dynamic-link: ldd should not try to execute the binaries
1514 [16777] localedata: pl_PL: incorrect thousands separator in locale
1515 [16905] localedata: hanzi: new collation
1516 [17563] localedata: cmn_TW: add hanzi collation
1517 [17750] localedata: wrong collation order of diacritics in most locales
1518 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1520 [17956] build: Build fails on missing definitions from header file
1521 nss/nss.h when Mozilla NSS is used for cryptography
1522 [18203] libc: realpath() does not handle unreachable paths correctly
1523 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1524 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1525 [18822] libc: Internal functions are called via PLT
1526 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1527 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1528 [19574] libc: glibc should support building static PIE binaries
1529 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1531 [19971] glob: glob: Do not skip entries with zero d_ino values
1532 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1533 [20008] localedata: km_KH: convert to translit_neutral
1534 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1535 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1536 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1537 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1538 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1540 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1541 they're set, wrong errors returned by gaih_inet when lookup functions
1543 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1544 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1546 [20952] localedata: yuw_PG: new locale
1547 [21084] localedata: charmaps/IBM858: new codepage
1548 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1549 [21242] libc: assert gives pedantic warning in old gcc versions
1550 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1551 __regcall calling convention
1552 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1553 [21326] libc: C99 functions are not declared for C++11 and later if
1554 _GNU_SOURCE is not predefined by g++
1555 [21457] libc: sys/ucontext.h namespace
1556 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1557 [21660] math: GCC fails to compile a formula with tgmath.h
1558 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1559 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1560 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1561 [21684] math: tgmath.h handling of complex integers
1562 [21685] math: tgmath.h handling of bit-fields
1563 [21686] math: tgmath.h handling of __int128
1564 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1566 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1568 [21750] localedata: column width of characters incompatible with classical
1570 [21754] malloc: malloc: Perform as little work as possible after heap
1571 consistency check failures
1572 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1573 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1574 [21791] string: Unused XXX_chk_XXX functions in libc.a
1575 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1577 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1579 [21845] localedata: Added new Locale bho_NP
1580 [21853] localedata: Fix abday Which looks same as day in zh_SG
1581 [21854] localedata: Added New Locale en_SC
1582 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1583 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1584 _dl_runtime_resolve_avx_slow
1585 [21885] network: getaddrinfo: gethosts does not release resolver context
1586 on memory allocation failure
1587 [21899] libc: XPG4.2 sigaction namespace
1588 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1590 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1592 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1593 errno value, causing getaddrinfo to fail
1594 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1595 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1596 instead of EAI_NODATA
1597 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1598 constant PTRACE_SEIZE_DEVEL
1599 [21930] math: C-only gcc builtins used in <math.h> isinf
1600 [21932] network: Unpaired __resolv_context_get in generic get*_r
1602 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1603 [21944] libc: sigval namespace
1604 [21951] localedata: Update hanzi collation by stroke
1605 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1606 sysdeps/x86_64/fpu/e_expf.S
1607 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1608 allocation in syscall loops)
1609 [21959] localedata: Fix Country name for xh_ZA
1610 [21960] localedata: Fix abmon for bem_ZM
1611 [21966] math: AVX2 mathvec functions use FMA without checking
1612 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1613 [21971] localedata: Added New Locale for mfe_MU
1614 [21972] libc: assert macro requires operator== (int) for its argument type
1615 [21973] math: [sparc] libm missing sqrtl compat symbol
1616 [21974] libc: Remove __bb_init_func and __bb_exit_func
1617 [21982] string: stratcliff.c: error: assuming signed overflow does not
1619 [21986] stdio: __guess_grouping is called incorrectly
1620 [21987] math: [sparc32] wrong bits/long-double.h installed
1621 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1623 [22022] localedata: Missing country_name for mni_IN
1624 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1626 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1628 [22026] locale: iconv_open: heap overflow on gconv_init failure
1629 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1630 [22035] math: [m68k] bits/math-inline.h macro namespace
1631 [22038] localedata: Fix abbreviated weeks and months for Somali
1632 [22044] localedata: Remove redundant data for Limburgish Language
1633 [22050] malloc: Linking with -lmcheck does not hook
1634 __malloc_initialize_hook correctly
1635 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1636 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1637 [22070] localedata: charmaps/UTF-8: wcwidth for
1638 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1639 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1640 Jungseong and Jongseong) should be 0
1641 [22078] nss: nss_files performance issue in multi mode
1642 [22082] math: bits/math-finite.h exp10 condition
1643 [22086] libc: pcprofiledump incorrect cross-endian condition
1644 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1645 [22095] network: Name server address allocation memory leak in resolv.conf
1647 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1649 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1650 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1652 [22111] malloc: malloc: per thread cache is not returned when thread exits
1653 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1654 [22134] libc: [linux] implement fexecve with execveat
1655 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1657 [22145] libc: ttyname() gives up too early in the face of namespaces
1658 [22146] math: C++ build issue with float128 on x86_64
1659 [22153] nptl: nptl: save error code before process termination
1660 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1661 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1662 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1663 [22165] libc: [hppa] Text relocations in libc.so
1664 [22180] libc: destructor registered via __cxa_atexit is called twice
1665 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1666 symlinks") cause "make" segfaults
1667 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1669 [22207] libc: FAIL: stdlib/test-atexit-race
1670 [22225] math: nearbyint arithmetic moved before feholdexcept
1671 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1672 [22235] math: iscanonical in C++ and float128
1673 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1674 the svid compat wrapper
1675 [22244] math: ynf and yn are wrong without the svid compat wrapper
1676 [22273] libc: Improper assert in Linux posix_spawn implementation
1677 [22284] libc: -pg -pie doesn't work
1678 [22292] locale: localedef exits with error 4 when it should be error 1
1679 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1680 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1682 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1683 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1685 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1686 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1687 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1688 [22322] libc: [mips64] wrong bits/long-double.h installed
1689 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1690 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1692 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1693 [22343] malloc: Integer overflow in posix_memalign
1694 [22347] libc: getrandom() returns the number of bytes that were copied to
1695 the buffer even though the comments say "Return 0 on success and -1 on
1697 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1698 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1700 [22370] dynamic-link: Incorrect note padding check
1701 [22375] libc: malloc returns pointer from tcache_get when should return
1702 NULL (CVE-2017-17426)
1703 [22377] math: iseqsig, float128 and C++
1704 [22382] localedata: Error in tpi_PG locale
1705 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1706 inside the ASCII printable range
1707 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1709 [22403] localedata: Slash needs escaping in some locales
1710 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1711 [22409] network: res_hnok does not accept some host names used on the
1713 [22412] network: res_dnok, res_hnok should perform syntax checks
1714 [22413] network: ns_name_pton ignores syntactically invalid trailing
1716 [22415] stdio: setvbuf can lead to invalid free/segfault
1717 [22432] build: Non-deterministic build
1718 [22439] malloc: malloc_info should compute summary statistics for all sub-
1720 [22442] network: if_nametoindex could report index for the wrong
1721 networking interface
1722 [22446] build: aliasing violation calling readlink in handle_request
1723 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1724 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1725 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1726 __nscd_hash/__nss_hash
1727 [22463] network: p_secstodate overflow handling
1728 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1729 [22478] libc: sigwait can fail with EINTR
1730 [22505] libc: ldconfig processes include directive in locale-specific
1732 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1733 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1734 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1735 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1736 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1737 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1738 same as for Croatian
1739 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1740 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1741 [22577] libc: missing newline after "cannot allocate TLS data structures
1743 [22588] manual: manual/conf.texi: missing underscore in front of
1745 [22593] math: nextafter and nexttoward are declared with const attribute
1746 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1747 [22603] string: ia64 memchr overflows internal pointer check
1748 [22605] libc: SH clone does not set the exit code correctly
1749 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1751 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1752 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1753 modified in case of success
1754 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1755 [22615] manual: manual: ambiguous wording about errno value in case of
1757 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1759 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1760 binaries or if /proc is not mounted (CVE-2017-16997)
1761 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1762 [22630] build: $(no-pie-ldflag) is no longer effective
1763 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1764 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1765 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1766 [22637] nptl: guard size is subtracted from thread stack size instead of
1768 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1769 [22657] localedata: hu_HU: Avoid double space in date
1770 [22660] math: fmax, fmin sNaN handling on alpha
1771 [22664] libc: New warning of GCC8
1772 [22665] math: alpha: ceil and floor raise inexact exceptions
1773 [22666] math: alpha: trunc raise inexact exceptions
1774 [22667] libc: makecontext lacks stack alignment on i386
1775 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1776 [22679] libc: getcwd(3) can succeed without returning an absolute path
1778 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1779 elision and tunables
1780 [22687] math: [powerpc-nofpu] complex long double functions spurious
1782 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1783 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1784 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1786 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1787 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1789 [22701] nis: Incomplete removal of libnsl
1790 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1791 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1792 [22715] dynamic-link: FAIL: elf/tst-audit10
1793 [22719] libc: Backtrace tests fail on hppa
1794 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1795 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1796 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1797 before the first call to crypt_r () in crypt/badsalttest.c
1804 * A per-thread cache has been added to malloc. Access to the cache requires
1805 no locks and therefore significantly accelerates the fast path to allocate
1806 and free small amounts of memory. Refilling an empty cache requires locking
1807 the underlying arena. Performance measurements show significant gains in a
1808 wide variety of user workloads. Workloads were captured using a special
1809 instrumented malloc and analyzed with a malloc simulator. Contributed by
1810 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1812 * Unicode 10.0.0 Support: Character encoding, character type info, and
1813 transliteration tables are all updated to Unicode 10.0.0, using
1814 generator scripts contributed by Mike FABIAN (Red Hat).
1815 These updates cause user visible changes, especially the changes in
1816 wcwidth for many emoji characters cause problems when emoji sequences
1817 are rendered with pango, see for example:
1818 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1820 * Collation of Hungarian has been overhauled and is now consistent with "The
1821 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1824 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1826 - The GNU C Library will now detect when /etc/resolv.conf has been
1827 modified and reload the changed configuration. The new resolver option
1828 “no-reload” (RES_NORELOAD) disables this behavior.
1830 - The GNU C Library now supports an arbitrary number of search domains
1831 (configured using the “search” directive in /etc/resolv.conf);
1832 previously, there was a hard limit of six domains. For backward
1833 compatibility, applications that directly modify the ‘_res’ global
1834 object are still limited to six search domains.
1836 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
1837 Library will now randomly pick a name server from the configuration as a
1838 starting point. (Previously, the second name server was always used.)
1840 * The tunables feature is now enabled by default. This allows users to tweak
1841 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1843 * New function reallocarray, which resizes an allocated block (like realloc)
1844 to the product of two sizes, with a guaranteed clean failure upon integer
1845 overflow in the multiplication. Originally from OpenBSD, contributed by
1846 Dennis Wölfing and Rüdiger Sonderfeld.
1848 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1849 These are extended versions of preadv and pwritev, respectively, taking an
1850 additional flags argument. The set of supported flags depends on the
1851 running kernel; full support currently requires kernel 4.7 or later.
1853 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1854 create a new session ID for the spawned process. This feature is
1855 scheduled to be added to the next major revision of POSIX; for the time
1856 being, it is available under _GNU_SOURCE.
1858 * errno.h is now safe to use from C-preprocessed assembly language on all
1859 supported operating systems. In this context, it will only define the
1860 Exxxx constants, as preprocessor macros expanding to integer literals.
1862 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1863 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1864 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1865 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1867 To compile programs that use this feature, the compiler must support
1868 128-bit floating point with the type name _Float128 (as defined by TS
1869 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1870 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1871 must be defined to make the new interfaces visible.
1873 The new functions and macros correspond to those present for other
1874 floating-point types (except for a few obsolescent interfaces not
1875 supported for the new type), with F128 or f128 suffixes; for example,
1876 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1877 printf or scanf formats for the new type; the strfromf128 and strtof128
1878 interfaces should be used instead.
1880 Deprecated and removed features, and other changes affecting compatibility:
1882 * The synchronization that pthread_spin_unlock performs has been changed to
1883 now be equivalent to a C11 atomic store with release memory order to the
1884 spin lock's memory location. Previously, several (but not all)
1885 architectures used stronger synchronization (e.g., containing what is
1886 often called a full barrier). This change can improve performance, but
1887 may affect odd fringe uses of spin locks that depend on the previous
1888 behavior (e.g., using spin locks as atomic variables to try to implement
1889 Dekker's mutual exclusion algorithm).
1891 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1894 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1895 will only be built and installed when the GNU C Library is configured with
1896 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1897 as TIRPC or rpcsvc-proto, to be used.
1899 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1900 libnss_compat, are deprecated, and will not be built or installed by
1903 The NIS(+) support library, libnsl, is also deprecated. By default, a
1904 compatibility shared library will be built and installed, but not headers
1905 or development libraries. Only a few NIS-related programs require this
1906 library. (In particular, the GNU C Library has never required programs
1907 that use 'gethostbyname' to be linked with libnsl.)
1909 Replacement implementations based on TIRPC, which additionally support
1910 IPv6, are available from <https://github.com/thkukuk/>. The configure
1911 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1912 name service modules, to be built and installed.
1914 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1915 support is enabled, the configured recursive resolver must support EDNS.
1916 (Responding to EDNS-enabled queries with responses which are not
1917 EDNS-enabled is fine, but FORMERR responses are not.)
1919 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1920 servers have not supported this opcode for a long time.
1922 * The _res_opcodes variable has been removed from libresolv. It had been
1923 exported by accident.
1925 * <string.h> no longer includes inline versions of any string functions,
1926 as this kind of optimization is better done by the compiler. The macros
1927 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1929 * The nonstandard header <xlocale.h> has been removed. Most programs should
1930 use <locale.h> instead. If you have a specific need for the definition of
1931 locale_t with no other declarations, please contact
1932 libc-alpha@sourceware.org and explain.
1934 * The obsolete header <sys/ultrasound.h> has been removed.
1936 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1938 * The obsolete function cfree has been removed. Applications should use
1941 * The stack_t type no longer has the name struct sigaltstack. This changes
1942 the C++ name mangling for interfaces involving this type.
1944 * The ucontext_t type no longer has the name struct ucontext. This changes
1945 the C++ name mangling for interfaces involving this type.
1947 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1948 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1949 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1950 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1951 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1952 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1953 fpregset_t type no longer has the name struct fpu. This changes the C++
1954 name mangling for interfaces involving those types.
1956 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1957 synced with the kernel:
1959 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1960 are not supported on this architecture and have been removed.
1962 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1963 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1964 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1966 Programs that assume the GET/SETREGS ptrace requests are universally
1967 available will now fail to build, instead of malfunctioning at runtime.
1969 Changes to build and runtime requirements:
1971 * Linux kernel 3.2 or later is required at runtime, on all architectures
1972 supported by that kernel. (This is a change from version 2.25 only for
1975 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1977 * On most architectures, GCC 4.9 or later is required to build the GNU C
1978 Library. On powerpc64le, GCC 6.2 or later is required.
1980 Older GCC versions and non-GNU compilers are still supported when
1981 compiling programs that use the GNU C Library. (We do not know exactly
1982 how old, and some GNU extensions to C may be _de facto_ required. If you
1983 are interested in helping us make this statement less vague, please
1984 contact libc-alpha@sourceware.org.)
1986 Security related changes:
1988 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1989 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1991 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1992 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1994 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1995 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1998 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1999 fixed (CVE-2017-12133).
2001 The following bugs are resolved with this release:
2003 [984] network: Respond to changed resolv.conf in gethostbyname
2004 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
2005 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
2007 [12189] libc: __stack_chk_fail should not attempt a backtrace
2009 [14096] time: Race condition on timezone/tst-timezone.out
2010 [14172] localedata: az_IR: new locale
2011 [14995] build: glibc fails to build if gold is the default linker, even if
2013 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
2014 [16637] network: inet_pton function is accepting IPv6 with bad format
2015 [16640] string: string/strtok.c: undefined behaviour inconsistent between
2016 x86 and other generic code
2017 [16875] localedata: ko_KR: fix lang_name
2018 [17225] localedata: ar_SY: localized month names for May and June are
2020 [17297] localedata: da_DK: wrong date_fmt string
2021 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
2022 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
2023 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
2024 [19066] localedata: ar_SA abbreviated day and month names are in English
2025 [19569] network: resolv: Support an arbitrary number of search domains
2026 [19570] network: Implement random DNS server selection in the stub
2028 [19838] locale: localedef fails on PA-RISC
2029 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
2030 order of 0D36 and 0D37
2031 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
2033 [20098] libc: FAIL: debug/backtrace-tst on hppa
2034 [20257] network: sunrpc: clntudp_call does not enforce timeout when
2036 [20275] localedata: locale day/abday/mon/abmon should not have trailing
2038 [20313] localedata: Update locale data to Unicode 9.0
2039 [20424] manual: Document how to provide a malloc replacement
2040 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
2042 [20686] locale: Add el_GR@euro to SUPPORTED.
2043 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
2044 failures consistently
2045 [21015] dynamic-link: Document and fix --enable-bind-now
2046 [21016] nptl: pthread_cond support is broken on hppa
2047 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
2048 frame-pointer on i386
2049 [21049] libc: segfault in longjmp_chk() due to clobbered processor
2051 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
2052 [21088] libc: Build fails with --enable-static-nss
2053 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
2054 generic c code is used
2055 [21109] libc: Tunables broken on big-endian
2056 [21112] math: powf has large ulp errors with base close to 1 and exponent
2058 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
2060 [21120] malloc: glibc malloc is incompatible with GCC 7
2061 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
2063 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
2064 (-0.0) when linking with -lieee
2065 [21171] math: log10, log2 and lgamma return incorrect results
2066 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2067 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2068 [21207] localedata: ce_RU: update weekdays from CLDR
2069 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2070 [21217] localedata: Update months from CLDR-31
2071 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2072 [21243] libc: support_delete_temp_file should issue warning for failed
2074 [21244] libc: support resolv_test_start() socket fd close should be
2076 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2077 new posix_spawn implementation
2078 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2079 leads to lower CPU frequency
2080 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2081 [21261] libc: [sparc64] bits/setjmp.h namespace
2082 [21267] network: [mips] bits/socket.h IOC* namespace
2083 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2084 [21270] libc: mmap64 silently truncates large offset values
2085 [21275] libc: posix_spawn always crashes on ia64 now
2086 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2087 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2088 [21289] libc: Incorrect declaration for 32-bit platforms with
2089 _FILE_OFFSET_BITS=64 causes build error
2090 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2091 not support gethostbyname4_r
2092 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2094 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2096 [21340] libc: Support POSIX_SPAWN_SETSID
2097 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2098 [21359] network: ns_name_pack needs additional byte in destination buffer
2099 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2100 against fragmentation attacks (CVE-2017-12132)
2101 [21369] network: resolv: Remove EDNS fallback
2102 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2104 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2105 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2106 [21393] stdio: Missing dup3 error check in freopen, freopen64
2107 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2108 [21399] localedata: Bad description for U00EC in
2109 localedata/charmaps/CP1254
2110 [21411] malloc: realloc documentation error
2111 [21426] network: sys/socket.h uio.h namespace
2112 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2113 [21445] libc: signal.h bsd_signal namespace
2114 [21455] network: Network headers stdint.h namespace
2115 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2117 [21475] network: resolv: Overlong search path is truncated mid-label
2118 [21511] libc: sigstack namespace
2119 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2120 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2121 bits/syscall.h: No such file or directory
2122 [21517] libc: struct sigaltstack namespace
2123 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2124 [21533] localedata: Update locale data to Unicode 10.0
2126 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2127 junk at end of line, first unrecognized character is `@'
2128 [21538] libc: SIG_HOLD missing for XPG4
2129 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2130 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2131 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2132 [21543] libc: sigevent namespace
2133 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2134 size for general purpose registers in mcontext_t structure
2135 [21550] libc: sigwait namespace
2136 [21552] libc: XPG4 bsd_signal namespace
2137 [21554] libc: sigpause namespace
2138 [21560] libc: sys/wait.h signal.h namespace
2139 [21561] libc: waitid namespace
2140 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2141 '/usr/include/stdlib.h': Permission denied
2142 [21575] libc: sys/wait.h missing struct rusage definition
2143 [21584] libc: sigaltstack etc namespace
2144 [21597] libc: siginterrupt namespace
2145 [21607] math: hppa: FAIL: math/test-tgmath
2146 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2148 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2149 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2150 stack and heap (CVE-2017-1000366)
2151 [21625] libc: wait3 namespace
2152 [21654] nss: Incorrect pointer alignment in NSS group merge result
2154 [21657] network: Parse interface zone id for node-local multicast
2155 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2157 [21666] libc: .symver is used on common symbol
2158 [21668] network: resolv: res_init cross-thread broadcast introduces race
2160 [21687] math: tgmath.h totalorder, totalordermag return type
2161 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2163 [21696] libc: Incorrect assumption of of __cpu_mask in
2164 posix/sched_cpucount.c
2165 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2166 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2168 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2169 leading to relocation crash
2170 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2171 `resolv_conf_matches (resp, conf)' failed.
2172 [21710] localedata: Added Samoan language locale for Samoa
2173 [21711] localedata: Pashto yesstr/nostr locale are missing
2174 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2175 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
2176 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2177 [21723] localedata: yesstr/nostr missing for Chinese language locale
2178 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2180 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2182 [21728] localedata: New Locale for Tongan language
2183 [21729] localedata: incorrect LC_NAME fields for hi_IN
2184 [21733] localedata: yesstr and nostr are missing for zh_HK
2185 [21734] localedata: Missing yesstr and nostr are for kw_GB
2186 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2187 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2188 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2189 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2191 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2193 [21749] localedata: Wrong abbreviated day name (“abday”) for
2195 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2196 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2197 [21759] localedata: missing yesstr and nostr for Tigrinya
2198 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2199 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2200 [21767] localedata: Missing Bislama locales
2201 [21768] localedata: Missing yesstr and nostr for aa_ET
2202 [21770] localedata: Missing Field in li_NL
2203 [21778] nptl: Robust mutex may deadlock
2204 [21779] libc: MicroBlaze segfaults when loading libpthread
2205 [21783] localedata: Fix int_select international_call_prefixes
2206 [21784] localedata: Inconsistency in country_isbn
2207 [21788] localedata: Missing Country Postal Abbreviations
2208 [21794] localedata: Added-country_isbn-for-Italy
2209 [21795] localedata: Add/Fix country_isbn for France
2210 [21796] localedata: Added country_isbn for Republic of Korea
2211 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2212 [21799] localedata: Added int_select international_call_prefixes
2213 [21801] localedata: Added int_select international_call_prefixes
2214 [21804] nptl: Double semicolon in thread-shared-types.h
2215 [21807] localedata: LC_ADDRESS fix for pap_CW
2216 [21808] localedata: Fix LC_ADDRESS for pap_AW
2217 [21821] localedata: Added country_name in mai_IN
2218 [21822] localedata: Fix LC_TIME for mai_IN
2219 [21823] localedata: missing yesstr, nostr for sa_IN
2220 [21825] localedata: Fix name_mrs for mag_IN
2221 [21828] localedata: 2.26 changelog should mention user visible changes
2223 [21835] localedata: Added Maithili language locale for Nepal
2224 [21838] localedata: Removed redundant data for the_NP
2225 [21839] localedata: Fix LC_MONETARY for ta_LK
2226 [21844] localedata: Fix Latin characters and Months Sequence.
2227 [21848] localedata: Fix mai_NP Title Name
2232 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2233 24731-2:2010, is supported to enable declarations of functions from that
2234 TR. Note that not all functions from that TR are supported by the GNU C
2237 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2238 18661-1:2014, is supported to enable declarations of functions and macros
2239 from that TS. Note that not all features from that TS are supported by
2242 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2243 18661-4:2015, is supported to enable declarations of functions and macros
2244 from that TS. Note that most features from that TS are not supported by
2247 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2248 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2249 Since the GNU C Library defaults to a much newer revision of POSIX, this
2250 will only affect programs that specifically request an old conformance
2251 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2252 see a change in the visible declarations, but a program compiled with
2253 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2256 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2257 defined by all multithreaded code, but glibc has not required this for
2260 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2261 means that in a future release, the macros “major”, “minor”, and “makedev”
2262 will only be available from <sys/sysmacros.h>.
2264 These macros are not part of POSIX nor XSI, and their names frequently
2265 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2266 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2267 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2270 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2271 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2272 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2274 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2275 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2276 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2277 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2278 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2279 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2280 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2281 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2282 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2283 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2284 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2287 * New <math.h> features are added from TS 18661-1:2014:
2289 - Signaling NaN macros: SNANF, SNAN, SNANL.
2291 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2292 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2293 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2295 - llogb functions: the llogb, llogbf and llogbl functions, and the
2296 FP_LLOGB0 and FP_LLOGBNAN macros.
2298 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2301 - Comparison macros: iseqsig.
2303 - Classification macros: iscanonical, issubnormal, iszero.
2305 - Total order functions: totalorder, totalorderf, totalorderl,
2306 totalordermag, totalordermagf, totalordermagl.
2308 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2310 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2311 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2313 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2314 are added to libc. They convert a floating-point number into string.
2316 * Most of glibc can now be built with the stack smashing protector enabled.
2317 It is recommended to build glibc with --enable-stack-protector=strong.
2318 Implemented by Nick Alcock (Oracle).
2320 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2321 intended to be used instead of memset() to erase sensitive data after use;
2322 the compiler will not optimize out calls to explicit_bzero even if they
2323 are "unnecessary" (in the sense that no _correct_ program can observe the
2324 effects of the memory clear).
2326 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2327 to float instead of double. This does not affect the ABI of any libraries
2328 that are part of the GNU C Library, but may affect the ABI of other
2329 libraries that use this type in their interfaces.
2331 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2332 float_t and double_t types are now defined to long double instead of float
2333 and double. These options are not the default, and this does not affect
2334 the ABI of any libraries that are part of the GNU C Library, but it may
2335 affect the ABI of other libraries that use this type in their interfaces,
2336 if they are compiled or used with those options.
2338 * The getentropy and getrandom functions, and the <sys/random.h> header file
2341 * The buffer size for byte-oriented stdio streams is now limited to 8192
2342 bytes by default. Previously, on Linux, the default buffer size on most
2343 file systems was 4096 bytes (and thus remains unchanged), except on
2344 network file systems, where the buffer size was unpredictable and could be
2345 as large as several megabytes.
2347 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2348 for the Linux quota interface which predates kernel version 2.4.22 has
2351 * The malloc_get_state and malloc_set_state functions have been removed.
2352 Already-existing binaries that dynamically link to these functions will
2353 get a hidden implementation in which malloc_get_state is a stub. As far
2354 as we know, these functions are used only by GNU Emacs and this change
2355 will not adversely affect already-built Emacs executables. Any undumped
2356 Emacs executables, which normally exist only during an Emacs build, should
2357 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2359 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2360 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2361 “no-ip6-dotint” had already been the default, and support for the
2362 “ip6-dotint” option was removed from the Internet in 2006.
2364 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2365 flag from <resolv.h> have been removed. The option relied on a
2366 backwards-incompatible DNS extension which was never deployed on the
2369 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2370 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2371 They were already unimplemented.
2373 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2374 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2375 removed again from the IETF name lookup interface specification in RFC
2376 2553. Applications should use getaddrinfo instead.
2378 * DNSSEC-related declarations and definitions have been removed from the
2379 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2380 decode the data part of DNSSEC record types. Previous versions of glibc
2381 only implemented minimal support for the previous version of DNSSEC, which
2382 is incompatible with the currently deployed version.
2384 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2385 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2386 <arpa/nameser.h> header file because the distinction between RR types and
2387 meta-RR types is not officially standardized, subject to revision, and
2388 thus not suitable for encoding in a macro.
2390 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2391 and rhook members of the res_state type in <resolv.h> have been removed.
2392 The glibc stub resolver did not support these hooks, but the header file
2393 did not reflect that.
2395 * For multi-arch support it is recommended to use a GCC which has
2396 been built with support for GNU indirect functions. This ensures
2397 that correct debugging information is generated for functions
2398 selected by IFUNC resolvers. This support can either be enabled by
2399 configuring GCC with '--enable-gnu-indirect-function', or by
2400 enabling it by default by setting 'default_gnu_indirect_function'
2401 variable for a particular architecture in the GCC source file
2404 * GDB pretty printers have been added for mutex and condition variable
2405 structures in POSIX Threads. When installed and loaded in gdb these pretty
2406 printers show various pthread variables in human-readable form when read
2407 using the 'print' or 'display' commands in gdb.
2409 * Tunables feature added to allow tweaking of the runtime for an application
2410 program. This feature can be enabled with the '--enable-tunables' configure
2411 flag. The GNU C Library manual has details on usage and README.tunables has
2412 instructions on adding new tunables to the library.
2414 * A new version of condition variables functions have been implemented in
2415 the NPTL implementation of POSIX Threads to provide stronger ordering
2418 * A new version of pthread_rwlock functions have been implemented to use a more
2419 scalable algorithm primarily through not using a critical section anymore to
2422 Security related changes:
2424 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2425 have been created with makecontext could fail to terminate due to a
2426 missing .cantunwind annotation. This has been observed to lead to a hang
2427 (denial of service) in some Go applications compiled with gccgo. Reported
2428 by Andreas Schwab. (CVE-2016-6323)
2430 * The DNS stub resolver functions would crash due to a NULL pointer
2431 dereference when processing a query with a valid DNS question type which
2432 was used internally in the implementation. The stub resolver now uses a
2433 question type which is outside the range of valid question type values.
2436 The following bugs are resolved with this release:
2438 [4099] stdio: Overly agressive caching by stream i/o functions.
2439 [7065] build: Support building glibc with -fstack-protector or -fstack-
2441 [9842] localedata: en_CA: incorrect date format
2442 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2443 before it started waiting
2444 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2445 [15765] nptl: sem_open is wrongly a cancellation point
2446 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2447 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2449 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2450 library linked with pthread
2451 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2452 "FIXME: Ingo" issue)
2453 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2454 [17252] libc: getrandom and getentropy syscall
2455 [17730] malloc: thread-local storage is sometimes improperly free()'d
2456 after being __libc_memalign()'d
2457 [18241] stdio: failed fseek on memstream does not set errno and can fail
2459 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2461 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2462 PTHREAD_PRIO_INHERIT mutex on ARM
2463 [18784] network: res_query and related function crash for special record
2464 type queries (CVE-2015-5180)
2465 [19380] math: strtod does not raise "inexact"
2466 [19387] string: Integer overflow in memchr
2467 [19390] string: Integer overflow in strncat
2468 [19398] build: linknamespace tests fail with massively parallel build
2469 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2471 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2472 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2473 [19514] libc: [PATCH] Fix spelling errors in spelling
2474 "implement"/"implementation" in several places
2475 [19582] network: Deprecate RES_USE_INET6
2476 [19673] manual: clog10 docs appear to be erroneous
2477 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2478 causes a segmentation fault
2479 [19826] libc: invalid pointer returned from __tls_get_addr with static
2481 [20016] network: resolv: Remove hooks support from the API
2482 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2484 [20033] math: [x86_64] vectorized math function don't call the __finite
2486 [20116] nptl: use after free in pthread_create
2487 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2488 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2490 [20311] nptl: please install proc_service.h
2491 [20366] libc: Compilation errors in installed headers in strict-compliance
2493 [20370] malloc: malloc: Arena free list management is still racy
2494 (incorrect fix in bug 19243)
2495 [20386] libc: assert (X = 0) does not result in GCC warning
2496 [20432] malloc: malloc: Minimize interface required for interposition
2497 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2498 in _Unwind_Backtrace (CVE-2016-6323)
2499 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2500 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2502 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2503 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2504 [20477] network: resolv: incorrect double-checked locking related to
2506 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2508 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2510 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2511 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2512 cause transition penalty
2513 [20517] math: sparcv9 missing fdiml compat symbol
2514 [20524] manual: strverscmp is inconsistent
2515 [20525] libc: <sys/quota.h> should be based on kernel headers
2516 [20539] math: GCC 7 -static -lm fails to link at -O3
2517 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2519 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2521 [20591] network: Remove obsolete DNSSEC support
2522 [20592] network: DNS resource record type classification macros in
2523 <arpa/nameser.h> are incorrect
2524 [20593] network: Update DNS RR type definitions
2525 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2526 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2528 [20629] network: libresolv: Remove support for bitstring labels
2530 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2531 assertion: "maxidx >= 2"
2532 [20660] math: [arm] Use VSQRT
2533 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2534 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2535 [20689] libc: Test for FMA should also check for AVX.
2536 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2537 [20715] math: iszero macro breaks existing code
2538 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2539 [20728] libc: powerpc: Missing TOC stub in clone
2540 [20729] build: glibc-2.24 fails to build for i486 with -Os
2541 [20750] build: Build fails with default PIE enabled gcc-6.x
2542 [20768] math: [alpha] sqrt fegetenv namespace
2543 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2545 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2546 __FLT_EVAL_METHOD__ is 2
2547 [20790] network: rpcgen buffer overrun in get_prog_declaration
2548 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2549 [20829] libc: crypt snprintf namespace
2550 [20847] libc: tst-vfork3 failure
2551 [20855] math: Default bits/mathdef.h has inappropriate float_t
2552 [20859] math: [sh4] FP_ILOGB0 invalid
2553 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2554 U+20AC), not same as GBK
2555 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2556 [20916] math: pow handling of sNaN arguments
2557 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2558 [20919] math: Bad pow (qNaN, 0) result with -lieee
2559 [20940] math: hypot sNaN handling
2560 [20947] math: fmax, fmin sNaN handling
2561 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2562 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2564 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2565 [20973] nptl: robust mutexes: Lost wake-ups
2566 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2567 [20978] nis: strlen on null pointer in nss_nisplus
2568 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2570 [21014] string: i686 memchr overflows internal pointer check
2571 [21019] libc: [mips] n32 lseek incorrect on overflow
2572 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2573 [21026] libc: [MIPS] readahead syscall is broken on n64
2574 [21028] math: Fallback fesetexceptflag should always succeed
2575 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2576 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2578 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2579 [21061] librt: [microblaze] librt lost clock_* exports
2580 [21073] libc: tunables: insecure environment variables passed to
2581 subprocesses with AT_SECURE
2582 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2586 * The minimum Linux kernel version that this version of the GNU C Library
2587 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2588 kernel version 2.6.32 or later suffices (on architectures that already
2589 required kernel versions more recent than 3.2, those requirements remain
2590 unchanged). Linux 3.2 or later kernel headers are required on all
2593 * The pap_AN locale has been deleted. This has been deprecated for a long
2594 time. It has been replaced by pap_AW & pap_CW, both of which have long
2595 been included in previous releases.
2597 * The readdir_r and readdir64_r functions have been deprecated. It is
2598 recommended to use readdir and readdir64 instead.
2600 * The type “union wait” has been removed. It was deprecated in the early
2601 1990s and never part of POSIX. Application code should use the int type
2602 instead of “union wait”.
2604 * A new NSS action is added to facilitate large distributed system
2605 administration. The action, MERGE, allows remote user stores like LDAP
2606 to be merged into local user stores like /etc/groups in order to provide
2607 easy to use, updated, and managed sets of merged credentials. The new
2608 action can be used by configuring it in /etc/nsswitch.conf:
2609 group: files [SUCCESS=merge] nis
2610 Implemented by Stephen Gallagher (Red Hat).
2612 * The deprecated __malloc_initialize_hook variable has been removed from the
2615 * The long unused localedef --old-style option has been removed. It hasn't
2616 done anything in over 16 years. Scripts using this option can safely
2619 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2620 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2621 return the next representable value in the direction of positive infinity
2622 and the nextdown functions return the next representable value in the
2623 direction of negative infinity. These are currently enabled as GNU
2626 Security related changes:
2628 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2629 could result in a stack overflow when getnetbyname was called with an
2630 overly long name. (CVE-2016-3075)
2632 * Previously, getaddrinfo copied large amounts of address data to the stack,
2633 even after the fix for CVE-2013-4458 has been applied, potentially
2634 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2635 instead. Reported by Michael Petlan. (CVE-2016-3706)
2637 * The glob function suffered from a stack-based buffer overflow when it was
2638 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2639 Reported by Alexander Cherepanov. (CVE-2016-1234)
2641 * The Sun RPC UDP client could exhaust all available stack space when
2642 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2643 alloca plugin for GCC. (CVE-2016-4429)
2645 * The IPv6 name server management code in libresolv could result in a memory
2646 leak for each thread which is created, performs a failing naming lookup,
2647 and exits. Over time, this could result in a denial of service due to
2648 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2650 The following bugs are resolved with this release:
2652 [1170] localedata: ne_NP: update Nepali locale definition file
2653 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2655 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2656 [6796] math: fdim() does not set errno on overflow
2657 [10354] libc: posix_spawn should use vfork() in more cases than presently
2658 [11213] localedata: localedata: add copyright disclaimer to locale files
2659 [12143] localedata: chr_US: new Cherokee locale
2660 [12450] localedata: sgs_LT: new locale
2661 [12676] localedata: ln_CD: new locale
2662 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2664 [13304] math: fma, fmaf, fmal produce wrong results
2665 [14259] build: --localedir arg to configure is ignored
2666 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2667 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2668 [14934] localedata: es_CL: wrong first weekday chilean locale
2669 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2671 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2673 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2674 [15368] nptl: raise() is not async-signal-safe
2675 [15479] math: ceil, floor, round and trunc raise inexact exception
2676 [15578] localedata: kk_KZ: various updates
2677 [16003] localedata: pap_AN: punt old locale
2678 [16137] localedata: iw_IL: punt old locale
2679 [16190] localedata: eo: new esperanto locale
2680 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2681 [16742] malloc: race condition: pthread_atfork() called before first
2682 malloc() results in unexpected locking behaviour/deadlocks
2683 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2685 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2686 [17565] localedata: pt_PT: wrong (work-)week start
2687 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2688 [17950] build: Build fails with -msse
2689 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2690 [18433] libc: posix_spawn does not return correctly upon failure to
2692 [18453] localedata: charmaps/IBM875: incorrect codes
2693 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2695 [18896] localedata: he_IL: improvements for currency
2696 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2697 Romanian locale data
2698 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2700 [19056] libc: Deprecate readdir_r
2701 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2703 [19198] localedata: nl_NL: small improvements for Dutch locales
2704 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2705 nameservers (CVE-2016-5417)
2706 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2708 [19400] locale: Language missing in "iso-639.def", trivial fix in
2710 [19431] malloc: Deadlock between fflush, getdelim, and fork
2711 [19505] libc: Incorrect file descriptor validity checks in
2712 posix_spawn_file_actions_add{open,close,dup2}
2713 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2714 when using RTLD_NEXT
2715 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2716 `intl/{gettextP,loadinfo}.h'
2717 [19534] libc: execle, execlp may use malloc
2718 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2719 [19573] network: res_nclose and __res_maybe_init disagree about name
2720 server initialization, breaking Hesiod
2721 [19575] localedata: Status of GB18030 tables
2722 [19581] localedata: sr_* date_fmt string contains additional newline
2723 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2725 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2726 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2727 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2728 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2730 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2732 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2734 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2735 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2736 [19633] locale: strfmon_l applies global locale to number formatting
2737 [19642] network: Memory leak in getnameinfo
2738 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2739 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2741 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2742 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2744 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2745 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2747 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2749 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2751 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2752 pointers and lengths in error-case.
2753 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2754 report errors on UTF-16 surrogates values.
2755 [19755] nscd: nscd assertion failure in gc
2756 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2757 [19759] libc: mempcpy shouldn't be inlined
2758 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2759 [19765] libc: s390 needs an optimized mempcpy
2760 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2761 NAME_MAX limit assumption (CVE-2016-1234)
2762 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2763 [19787] network: Missing and incorrect truncation checks in getnameinfo
2764 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2766 [19791] network: Assertion failure in res_query.c with un-connectable name
2768 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2769 [19822] math: libm.so install clobbers old version
2770 [19825] network: resolv: send_vc can return uninitialized data in second
2771 response to getaddrinfo
2772 [19830] network: nss_dns: should check RDATA length against buffer length
2773 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2774 confronted with A/AAAA records of invalid size
2775 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2776 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2777 [19853] stdio: Printing IBM long double in decimal with high precision is
2779 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2780 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2781 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2783 [19865] network: Assertion failure or memory leak in
2784 _nss_dns_getcanonname_r
2785 [19868] network: nss_dns: netent code does not skip over non-PTR records
2786 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2788 [19881] string: Improve x86-64 memset
2789 [19907] string: Incorrect memcpy tests
2790 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2792 [19925] libc: termios.h XCASE namespace
2793 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2794 [19929] libc: limits.h NL_NMAX namespace
2795 [19931] stdio: Memory leak in vfprintf
2796 [19957] libc: clone(CLONE_VM) access invalid parent memory
2797 [19963] localedata: en_IL: New locale
2798 [19989] stdio: stdio.h cuserid namespace
2799 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2801 [19996] locale: langinfo.h nl_langinfo_l namespace
2802 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2803 [20010] network: getaddrinfo: Stack overflow in hostent translation
2805 [20012] stdio: libio: fmemopen append mode failure
2806 [20014] stdio: stdio.h namespace for pre-threads POSIX
2807 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2808 [20023] libc: fcntl.h timespec namespace
2809 [20024] math: [x86_64] vectorized sincos trashes the stack
2810 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2811 [20041] time: sys/time.h timespec namespace
2812 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2813 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2814 [20051] libc: ttyslot in wrong header under wrong conditions
2815 [20054] libc: gethostname not declared for XPG4
2816 [20055] libc: termios.h missing tcgetsid for XPG4
2817 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2819 [20073] libc: sys/stat.h fchmod namespace
2820 [20074] libc: stdlib.h rand_r namespace
2821 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2822 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2824 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2825 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2827 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2828 [20119] libc: Wrong mask for processors level type from CPUID
2829 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2830 AS not supporting AVX512
2831 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2833 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2834 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2836 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2837 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2838 [20178] libc: posix_spawn{p} should not call exit
2839 [20191] stdio: libio: vtables hardening
2840 [20195] string: FMA4 detection requires CPUID execution with register
2842 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2843 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2845 [20212] math: acos (sNaN) returns sNaN
2846 [20213] math: asin (sNaN) returns sNaN
2847 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2848 [20218] math: [i386] asinhl (sNaN) returns sNaN
2849 [20219] math: [i386] atanhl (sNaN) returns sNaN
2850 [20222] stdio: fopencookie: Mangle function pointers
2851 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2852 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2853 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2855 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2856 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2857 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2858 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2859 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2860 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2861 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2862 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2863 [20240] math: modf (sNaN) returns sNaN
2864 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2865 [20250] math: frexp (sNaN) returns sNaN
2866 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2867 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2869 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2870 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2871 subscript is below array bounds [-Werror=array-bounds]
2872 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2873 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2875 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2876 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2878 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2879 "invalid" exceptions
2880 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2881 [20316] localedata: id_ID: Februari instead of Pebruari
2882 [20327] string: POWER8 strcasecmp returns incorrect result
2883 [20347] math: Failure: Test: j0_downward (0xap+0)
2884 [20348] libc: FAIL: misc/tst-preadvwritev64
2885 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2886 [20350] libc: There is no test for p{read,write}64
2887 [20357] math: Incorrect cos result for 1.5174239687223976
2888 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2892 * Unicode 8.0.0 Support: Character encoding, character type info, and
2893 transliteration tables are all updated to Unicode 8.0.0, using new
2894 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2895 These updates cause user visible changes, such as the fixes for bugs
2896 89, 16061, and 18568.
2898 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2899 kernel-internal CPU set size. This means that requests that change the
2900 CPU affinity which failed before (for example, an all-ones CPU mask) will
2901 now succeed. Applications that need to determine the effective CPU
2902 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2903 setting it because the kernel can adjust it (and the previous size check
2904 would not detect this in the majority of cases).
2906 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2907 the following new symbols are used: fts64_children, fts64_close,
2908 fts64_open, fts64_read and fts64_set.
2910 * getaddrinfo now detects certain invalid responses on an internal netlink
2911 socket. If such responses are received, an affected process will
2912 terminate with an error message of "Unexpected error <number> on netlink
2913 descriptor <number>" or "Unexpected netlink response of size <number> on
2914 descriptor <number>". The most likely cause for these errors is a
2915 multi-threaded application which erroneously closes and reuses the netlink
2916 file descriptor while it is used by getaddrinfo.
2918 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2919 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2920 unnecessary serialization of memory allocation requests across threads.
2921 The defect is now corrected. Users should see a substantial increase in
2922 the concurent throughput of allocation requests for applications which
2923 trigger this bug. Affected applications typically create and
2924 destroy threads frequently. (Bug 19048 was reported and analyzed by
2927 * There is now a --disable-timezone-tools configure option for disabling the
2928 building and installing of the timezone related utilities (zic, zdump, and
2929 tzselect). This is useful for people who build the timezone data and code
2930 independent of the GNU C Library.
2932 * The obsolete header <regexp.h> has been removed. Programs that require
2933 this header must be updated to use <regex.h> instead.
2935 * The obsolete functions bdflush, create_module, get_kernel_syms,
2936 query_module and uselib are no longer available to newly linked binaries;
2937 the header <sys/kdaemon.h> has been removed. These functions and header
2938 were specific to systems using the Linux kernel and could not usefully be
2939 used with the GNU C Library on systems with version 2.6 or later of the
2942 * Optimized string, wcsmbs and memory functions for IBM z13.
2943 Implemented by Stefan Liebler.
2945 * Newly linked programs that define a variable called signgam will no longer
2946 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2947 require signgam to be set by those functions must ensure that they use the
2948 variable provided by the GNU C Library and declared in <math.h>, without
2949 defining their own copy.
2951 * The minimum GCC version that can be used to build this version of the GNU
2952 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2953 still be used to compile programs using the GNU C Library.
2955 Security related changes:
2957 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2958 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2960 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2961 the pointer guard feature. It is always enabled. Previously,
2962 LD_POINTER_GUARD could be used to disable security hardening in binaries
2963 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2966 * An integer overflow in hcreate and hcreate_r could lead to an
2967 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2969 * The catopen function no longer has unbounded stack usage. Reported by
2970 Max. (CVE-2015-8779)
2972 * The nan, nanf and nanl functions no longer have unbounded stack usage
2973 depending on the length of the string passed as an argument to the
2974 functions. Reported by Joseph Myers. (CVE-2014-9761)
2976 * A stack-based buffer overflow was found in libresolv when invoked from
2977 libnss_dns, allowing specially crafted DNS responses to seize control
2978 of execution flow in the DNS client. The buffer overflow occurs in
2979 the functions send_dg (send datagram) and send_vc (send TCP) for the
2980 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2981 family. The use of AF_UNSPEC triggers the low-level resolver code to
2982 send out two parallel queries for A and AAAA. A mismanagement of the
2983 buffers used for those queries could result in the response of a query
2984 writing beyond the alloca allocated buffer created by
2985 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2986 the overflow. Thanks to the Google Security Team and Red Hat for
2987 reporting the security impact of this issue, and Robert Holiday of
2988 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2990 The following bugs are resolved with this release:
2992 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2993 [887] math: Math library function "logb" and "nextafter" inconsistent
2994 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2995 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2996 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2997 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2999 [4404] localedata: German translation of "Alarm clock" is misleading
3000 [6799] math: nextafter() and nexttoward() doen't set errno on
3001 overflow/underflow errors
3002 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
3004 [10432] nis: _nss_nis_setnetgrent assertion failure
3005 [11460] libc: fts has no LFS support
3006 [12926] network: getaddrinfo()/make_request() may spin forever
3007 [13065] nptl: Race condition in pthread barriers
3008 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
3009 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
3011 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
3012 [14912] libc: Rename non-installed bits/*.h headers
3013 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
3014 [15367] math: Let gcc use __builtin_isinf
3015 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
3016 [15421] math: lgamma wrongly sets signgam for ISO C
3017 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
3018 FE_INVALID with argument out of range
3019 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
3021 [15786] dynamic-link: ifunc resolver functions can smash function
3023 [15918] math: Unnecessary check for equality in hypotf()
3024 [16061] localedata: Review / update transliteration data
3025 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
3027 [16141] time: strptime %z offset restriction
3028 [16171] math: drem should be alias of remainder
3029 [16296] math: fegetround is pure?
3030 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
3031 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
3033 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
3034 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
3036 [16422] math: [powerpc] math-float, math-double failing llrint tests with
3037 "Exception "Inexact" set" on ppc32
3038 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
3039 [16517] math: Missing underflow exception from tanf/tan/tanl
3040 [16519] math: Missing underflow exception from sinhf
3041 [16520] math: Missing underflow exception from tanhf
3042 [16521] math: Missing underflow exception from exp2
3043 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
3045 [16734] stdio: fopen calls mmap to allocate its buffer
3046 [16961] math: nan function incorrect handling of bad sequences
3047 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
3048 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
3049 [16985] locale: localedef: confusing error message when opening output
3051 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
3052 [17197] locale: Redundant shift character in iconv conversion output at
3054 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
3055 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
3056 [17250] dynamic-link: static linking breaks nss loading
3057 (getaddrinfo/getpwnam/etc...)
3058 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
3060 [17441] math: isnan() should use __builtin_isnan() in GCC
3061 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
3062 (related to lock elision)
3063 [17787] manual: Exponent on page 324 of the PDF ends prematurely
3064 [17886] time: strptime should be able to parse "Z" as a timezone with %z
3065 [17887] time: strptime should be able to parse "+01:00" style timezones
3066 [17905] libc: catopen() Multiple unbounded stack allocations
3068 [18084] libc: backtrace (..., 0) dumps core on x86
3069 [18086] libc: nice() sets errno to 0 on success
3070 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3071 is too large (CVE-2015-8778)
3072 [18251] dynamic-link: SONAME missing when audit modules provides path
3073 [18265] libc: add attributes for wchar string and memory functions
3074 [18370] math: csqrt missing underflows
3075 [18421] libc: [hppa] read-only segment has dynamic relocations
3076 [18472] libc: Obsolete syscall wrappers should be compat symbols
3077 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3078 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3079 [18525] localedata: Remove locale timezone information
3080 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3081 [18568] localedata: Update locale data to Unicode 8.0
3082 [18589] locale: sort-test.sh fails at random
3083 [18595] math: ctan, ctanh missing underflows
3084 [18604] libc: assert macro-expands its argument
3085 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3086 contains a vector instruction exception.
3087 [18611] math: j1, jn missing errno setting on underflow
3088 [18618] localedata: sync Chechen locale definitions with other *_RU
3090 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3091 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3092 [18665] network: In send_dg, the recvfrom function is NOT always using the
3093 buffer size of a newly created buffer (CVE-2015-7547)
3094 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3096 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3098 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3099 [18699] math: tilegx cproj() for various complex infinities does not yield
3101 [18724] libc: Harden put*ent functions against data injection
3102 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3103 [18755] build: build errors with -DNDEBUG
3104 [18757] stdio: fmemopen fails to set errno on failure
3105 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3107 [18781] libc: openat64 lacks O_LARGEFILE
3108 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3109 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
3110 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3111 [18790] math: [ldbl-128ibm] tanhl inaccurate
3112 [18795] libc: stpncpy fortification misses buffer lengths that are
3113 statically too large
3114 [18796] build: build fails for --disable-mathvec
3115 [18803] math: hypot missing underflows
3116 [18820] stdio: fmemopen may leak memory on failure
3117 [18823] math: csqrt spurious underflows
3118 [18824] math: fma spurious underflows
3119 [18825] math: pow missing underflows
3120 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3121 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3122 [18870] build: sem_open.c fails to compile with missing symbol
3124 [18872] stdio: Fix memory leak in printf_positional
3125 [18873] libc: posix_fallocate overflow check ineffective
3126 [18875] math: Excess precision leads incorrect libm
3127 [18877] libc: arm: mmap offset regression
3128 [18887] libc: memory corruption when using getmntent on blank lines
3129 [18918] localedata: hu_HU: change time to HH:MM:SS format
3130 [18921] libc: Regression: extraneous stat() and fstat() performed by
3132 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3133 binaries (CVE-2015-8777)
3134 [18951] math: tgamma missing underflows
3135 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3137 [18953] localedata: lt_LT: change currency symbol to the euro
3138 [18956] math: powf inaccuracy
3139 [18961] math: [i386] exp missing underflows
3140 [18966] math: [i386] exp10 missing underflows
3141 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3142 [18969] build: multiple string test failures due to missing locale
3144 [18970] libc: Reference of pthread_setcancelstate in libc.a
3145 [18977] math: float / long double Bessel functions not in XSI POSIX
3146 [18980] math: i386 libm functions return with excess range and precision
3147 [18981] math: i386 scalb*, ldexp return with excess range and precision
3148 [18982] stdio: va_list and vprintf
3149 [18985] time: Passing out of range data to strftime() causes a segfault
3151 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3152 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3153 [19012] locale: iconv_open leaks memory on error path
3154 [19016] math: clog, clog10 inaccuracy
3155 [19018] nptl: Mangle function pointers in tls_dtor_list
3156 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3157 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3158 [19048] malloc: malloc: arena free list can become cyclic, increasing
3160 [19049] math: [powerpc] erfc incorrect zero sign
3161 [19050] math: [powerpc] log* incorrect zero sign
3162 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3163 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3164 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3165 [19074] network: Data race in _res_hconf_reorder_addrs
3166 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3167 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3168 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3170 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3172 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3173 [19086] manual: posix_fallocate64 documented argument order is wrong.
3174 [19088] math: lround, llround missing exceptions close to overflow
3176 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3177 [19095] math: dbl-64 lrint incorrect for 64-bit long
3178 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3179 [19124] dynamic-link: ld.so failed to build with older assmebler
3180 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3181 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3182 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3183 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3184 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3185 pthread_setaffinity_np
3186 [19156] math: [ldbl-128] j0l spurious underflows
3187 [19164] nptl: tst-getcpu fails with many possible CPUs
3188 [19168] math: math/test-ildoubl and math/test-ldouble failure
3189 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3190 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3192 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3193 (FE_NOMASK_ENV) do not clear SSE exceptions
3194 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3195 _int_new_arena/reused_arena
3196 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3197 [19201] math: dbl-64 remainder incorrect sign of zero result
3198 [19205] math: bits/math-finite.h conditions do not match math.h and
3200 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3201 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3202 for C99-based standards
3203 [19212] libc: features.h not -Wundef clean
3204 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3206 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3207 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3208 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3210 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3211 "inexact" exceptions
3212 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3214 [19242] libc: strtol incorrect in Turkish locales
3215 [19243] malloc: reused_arena can pick an arena on the free list, leading
3216 to an assertion failure and reference count corruption
3217 [19253] time: tzset() ineffective when temporary TZ did not include DST
3219 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3220 [19270] math: [hppa] Shared libm missing __isnanl
3221 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3222 MAP_HUGETLB and MAP_STACK defines
3223 [19313] nptl: Wrong __cpu_mask for x32
3224 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3225 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3226 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3227 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3228 [19363] time: x32: times() return value wrongly truncates/sign extends
3230 [19367] dynamic-link: Improve branch prediction on Silvermont
3231 [19369] network: Default domain name not reset by res_ninit when "search"
3232 / "domain" entry is removed from resolv.conf
3233 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3235 [19385] localedata: bg_BG: time separator should be colon, not comma
3236 [19408] libc: linux personality syscall wrapper may erroneously return an
3237 error on 32-bit architectures
3238 [19415] libc: dladdr returns wrong names on hppa
3239 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3240 IBM905, IBM907, and IBM909
3241 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3242 [19443] build: build failures with -DDEBUG
3243 [19451] build: Make check fails on test-double-vlen2
3244 [19462] libc: Glibc failed to build with -Os
3245 [19465] math: Wrong code with -Os
3246 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3248 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3250 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3251 [19486] math: S390: Math tests fail with "Exception Inexact set".
3252 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3253 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3255 [19590] math: Fail to build shared objects that use libmvec.so functions.
3259 * The following bugs are resolved with this release:
3261 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3262 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3263 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3264 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3265 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3266 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3267 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3268 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3269 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3270 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3271 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3272 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3273 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3274 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3275 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3276 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3277 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3278 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3279 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3280 18657, 18676, 18694, 18696, 18887.
3282 * Cache information can be queried via sysconf() function on s390 e.g. with
3283 _SC_LEVEL1_ICACHE_SIZE as argument.
3285 * A buffer overflow in gethostbyname_r and related functions performing DNS
3286 requests has been fixed. If the NSS functions were called with a
3287 misaligned buffer, the buffer length change due to pointer alignment was
3288 not taken into account. This could result in application crashes or,
3289 potentially arbitrary code execution, using crafted, but syntactically
3290 valid DNS responses. (CVE-2015-1781)
3292 * The time zone file parser has been made more robust against crafted time
3293 zone files, avoiding heap buffer overflows related to the processing of
3294 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3295 large time zone data files. Overly long time zone specifiers in the TZ
3296 variable no longer result in stack overflows and crashes.
3298 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3299 for LD and GD on x86 and x86-64, has been implemented. You will need
3300 binutils-2.24 or later to enable this optimization.
3302 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3303 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3304 Hat). These updates cause user visible changes, such as the fix for bug
3307 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3308 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3309 condition in some applications.
3311 * Added vector math library named libmvec with the following vectorized x86_64
3312 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3314 The library can be disabled with --disable-mathvec. Use of the functions is
3315 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3316 Shared library libmvec.so is linked in as needed when using -lm (no need to
3317 specify -lmvec explicitly for not static builds).
3318 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3320 * A new fmemopen implementation has been added with the goal of POSIX
3321 compliance. The new implementation fixes the following long-standing
3322 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3323 old implementation is still present for use be by existing binaries.
3325 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3326 releases. It has been fixed to match 2.19 and older, but binaries built
3327 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3329 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3330 Contributed by Roland McGrath (Google).
3332 * The header <regexp.h> is deprecated, and will be removed in a future
3333 release. Use of this header will trigger a deprecation warning.
3334 Application developers should update their code to use <regex.h> instead.
3336 This header was formerly part of SUS, but was deprecated in 1994 and
3337 removed from the standard in 2001. Also, the glibc implementation
3338 leaks memory. See BZ#18681 for more details.
3342 * The following bugs are resolved with this release:
3344 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3345 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3346 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3347 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3348 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3349 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3350 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3351 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3352 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3353 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3356 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3357 too little memory for the to-be-scanned arguments and overflow the
3358 allocated buffer. The implementation now correctly computes the required
3359 buffer size when using malloc, and switches to malloc from alloca as
3362 * A new semaphore algorithm has been implemented in generic C code for all
3363 machines. Previous custom assembly implementations of semaphore were
3364 difficult to reason about or ensure that they were safe. The new version
3365 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3366 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3367 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3369 * Port to Altera Nios II has been contributed by Mentor Graphics.
3371 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3372 implementations for powerpc64/powerpc64le.
3373 Implemented by Adhemerval Zanella (IBM).
3375 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3376 and powerpc64le. This may improve lock scaling of existing programs on
3377 HTM capable systems. The lock elision code is only enabled with
3378 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3379 powerpc will issue a transaction abort on every syscall to avoid side
3380 effects being visible outside transactions.
3382 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3383 AArch64. Contributed by ARM Ltd.
3385 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3387 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3388 under certain input conditions resulting in the execution of a shell for
3389 command substitution when the application did not request it. The
3390 implementation now checks WRDE_NOCMD immediately before executing the
3391 shell and returns the error WRDE_CMDSUB as expected.
3393 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3394 processing format strings with a large number of format specifiers.
3396 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3397 infinite loop if the DNS response contained a PTR record of an unexpected
3400 * The minimum GCC version that can be used to build this version of the GNU
3401 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3402 still be used to compile programs using the GNU C Library.
3404 * The GNU C Library is now built with -Werror by default. This can be
3405 disabled by configuring with --disable-werror.
3407 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3409 * The obsolete sigvec function has been removed. This was the original
3410 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3411 programs have been using instead for about 25 years. Of course, ABI
3412 compatibility for old binaries using sigvec remains intact.
3414 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3415 with newer versions of bison.
3417 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3418 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3419 registers overlay two consecutive single-precision registers. MIPS32R2
3420 introduced a new FPU mode (FR=1) where double-precision registers extend the
3421 corresponding single-precision registers which is incompatible with the
3422 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3423 require the use of FR=1 making a transition necessary. New o32 ABI
3424 extensions enable users to migrate over time from the original o32 ABI
3425 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3426 tracks the ABI of any loaded object and verifies that new objects are
3427 compatible. Mode transitions will also be requested as required and
3428 unsupportable objects will be rejected. The ABI checks include both soft and
3429 hard float ABIs for o32, n32 and n64.
3431 GCC 5 with GNU binutils 2.25 onwards:
3432 It is strongly recommended that all o32 system libraries are built using the
3433 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3434 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3435 compiler using --with-fp-32=xx to set this by default.
3439 * The following bugs are resolved with this release:
3441 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3442 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3443 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3444 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3445 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3446 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3447 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3448 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3449 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3450 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3451 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3452 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3453 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3454 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3455 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3457 * Reverted change of ABI data structures for s390 and s390x:
3458 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3459 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3460 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3461 are preserved pointing straight to the same implementation as the old ones.
3462 Given that, new callers will simply provide a too-big buffer to these
3463 functions. Any applications/libraries out there that embed jmp_buf or
3464 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3465 against 2.19 headers will have to rebuilt again. This is necessary in any
3466 case to revert the breakage in their ABI caused by the glibc change.
3468 * Support for file description locks is added to systems running the
3469 Linux kernel. The standard file locking interfaces are extended to
3470 operate on file descriptions, not file descriptors, via the use of
3471 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3472 are associated with an open file instead of a process.
3474 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3476 * The minimum Linux kernel version that this version of the GNU C Library
3477 can be used with is 2.6.32.
3479 * Running the testsuite no longer terminates as soon as a test fails.
3480 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3481 with PASS or FAIL lines for individual tests. A summary of the results is
3482 printed, including a list of failing lists, and "make check" exits with
3483 error status if there were any unexpected failures. "make check
3484 stop-on-test-failure=y" may be used to keep the old behavior.
3486 * The am33 port, which had not worked for several years, has been removed
3489 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3490 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3491 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3492 conflicted with POSIX (support for which was removed in 2.19), the
3493 interfaces those macros enabled remain available when compiling with
3494 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3495 test macros defined.
3497 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3499 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3500 This may improve lock scaling of existing programs on TX capable systems.
3501 The lock elision code is only built with --enable-lock-elision=yes and
3502 then requires a GCC version supporting the TX builtins. With lock elision
3503 default mutexes are elided via __builtin_tbegin, if the cpu supports
3504 transactions. By default lock elision is not enabled and the elision code
3507 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3508 copy the path argument. This allowed programs to cause posix_spawn to
3509 deference a dangling pointer, or use an unexpected pathname argument if
3510 the string was modified after the posix_spawn_file_actions_addopen
3513 * All supported architectures now use the main glibc sysdeps directory
3514 instead of some being in a separate "ports" directory (which was
3515 distributed separately before glibc 2.17).
3517 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3518 On configurations that support it (all Linux configurations), it's now
3519 used regardless of the --enable-add-ons switch to configure. It is no
3520 longer possible to build such configurations without pthreads support.
3522 * Locale names, including those obtained from environment variables (LANG
3523 and the LC_* variables), are more tightly checked for proper syntax.
3524 setlocale will now fail (with EINVAL) for locale names that are overly
3525 long, contain slashes without starting with a slash, or contain ".." path
3526 components. (CVE-2014-0475) Previously, some valid locale names were
3527 silently replaced with the "C" locale when running in AT_SECURE mode
3528 (e.g., in a SUID program). This is no longer necessary because of the
3531 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3532 with application code using Intel MPX instructions. (With all previous
3533 versions, the MPX register state could be clobbered when making calls
3534 into or out of a shared library.) Note that while the new dynamic
3535 linker is compatible with all known x86 hardware whether or not it
3536 supports Intel MPX, some x86 instruction-set emulators might fail to
3537 handle the new instruction encodings. This is known to affect Valgrind
3538 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3539 release), and might affect other tools that do instruction emulation.
3541 * Support for loadable gconv transliteration modules has been removed.
3542 The support for transliteration modules has been non-functional for
3543 over a decade, and the removal is prompted by security defects. The
3544 normal gconv conversion modules are still supported. Transliteration
3545 with //TRANSLIT is still possible, and the //IGNORE specifier
3546 continues to be supported. (CVE-2014-5119)
3548 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3549 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3550 resulting a denial-of-service security vulnerability in applications which
3551 use functions related to iconv. (CVE-2014-6040)
3555 * The following bugs are resolved with this release:
3557 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3558 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3559 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3560 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3561 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3562 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3563 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3564 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3565 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3566 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3567 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3568 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3569 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3570 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3571 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3572 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3573 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3574 16431, 16453, 16474, 16506, 16510, 16529
3576 * Slovenian translations for glibc messages have been contributed by the
3577 Translation Project's Slovenian team of translators.
3579 * The public headers no longer use __unused nor __block. This change is to
3580 support compiling programs that are derived from BSD sources and use
3581 __unused internally, and to support compiling with Clang's -fblock
3582 extension which uses __block.
3584 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3585 large collation sequences to optimize multiple passes. This cache
3586 computation may overflow for large collation sequences and may cause a
3587 stack or buffer overflow. This is now fixed to use a slower algorithm
3588 which does not use a cache if there is an integer overflow.
3590 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3591 rules for large collation sequences to optimize multiple passes and falls
3592 back to alloca if malloc fails, resulting in a possible stack overflow.
3593 The implementation now falls back to an uncached collation sequence lookup
3596 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3597 initialized for static applications resulting in the security feature
3598 being disabled. The pointer guard is now correctly initialized to a
3599 random value for static applications. Existing static applications need
3600 to be recompiled to take advantage of the fix (bug 15754).
3602 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3603 to the d_name member of struct dirent, or omit the terminating NUL
3604 character. (Bugzilla #14699).
3606 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3607 aligned_alloc functions could allocate too few bytes or corrupt the
3608 heap when passed very large allocation size values (Bugzilla #15855,
3611 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3612 for AF_INET6 has been fixed (Bugzilla #16072).
3614 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3615 pap_CW, quz_PE, the_NP.
3617 * Substantially revised locales: gd_GB, ht_HT
3619 * The LC_ADDRESS field was updated to support country_car for almost all
3622 * ISO 1427 definitions were updated.
3624 * ISO 3166 definitions were updated.
3626 * The localedef utility now supports --big-endian and --little-endian
3627 command-line options to generate locales for a different system from that
3628 for which the C library was built.
3630 * Binary locale files now only depend on the endianness of the system for
3631 which they are generated and not on other properties of that system. As a
3632 consequence, binary files generated with new localedef may be incompatible
3633 with old versions of the GNU C Library, and binary files generated with
3634 old localedef may be incompatible with this version of the GNU C Library,
3635 in the following circumstances:
3637 + Locale files may be incompatible on m68k systems.
3639 + Locale archive files (but not separate files for individual locales) may
3640 be incompatible on systems where plain "char" is signed.
3642 * The configure option --disable-versioning has been removed. Builds with
3643 --disable-versioning had not worked for several years.
3645 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3646 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3648 * SystemTap probes for malloc have been introduced.
3650 * SystemTap probes for slow multiple precision fallback paths of
3651 transcendental functions have been introduced.
3653 * Support for powerpc64le has been added.
3655 * The soft-float powerpc port now supports e500 processors.
3657 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3659 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3660 set of header declarations that are enabled by default, even when other
3661 feature test macros or compiler options such as -std=c99 would otherwise
3662 disable some of those declarations.
3664 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3665 conflict with POSIX. The libbsd-compat library (which was a dummy library
3666 that did nothing) has also been removed.
3668 * Preliminary documentation about Multi-Thread, Async-Signal and
3669 Async-Cancel Safety has been added.
3671 * Change of ABI data structures for s390 and s390x:
3672 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3673 allow for future hardware extensions. All library functions that accept or
3674 return these structures were versioned in order to provide backwards
3675 compatibility with existing code. However, not all cases can be handled
3676 with interface versioning. If an application embeds either structure into
3677 another structure and that structure is passed to another compilation unit
3678 which expects the newer larger-sized object then any access to the new
3679 fields will result in undefined behaviour. Similarly any access to fields
3680 that were moved by the enlarging of the structures will cause undefined
3681 behaviour. To fix the undefined behaviour all objects that are part of the
3682 final in-memory image must agree on the size of structures, and this may
3683 require recompilation.
3687 * The following bugs are resolved with this release:
3689 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3690 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3691 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3692 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3693 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3694 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3695 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3696 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3697 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3698 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3699 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3700 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3701 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3704 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3705 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3706 Distributions can re-enable building and using pt_chown via the new configure
3707 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3708 considerable security risks and should only be used if the distribution
3709 understands and accepts the risks.
3711 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3714 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3715 fixed (Bugzilla #15330).
3717 * Add support for calling C++11 thread_local object destructors on thread
3718 and program exit. This needs compiler support for offloading C++11
3719 destructor calls to glibc.
3721 * Improved worst case performance of libm functions with double inputs and
3724 * Support for priority inherited mutexes in pthread condition variables on
3725 non-x86 architectures.
3727 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3729 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3731 * Optimized string functions for ARM. Implemented by Will Newton and
3734 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3736 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3739 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3740 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3742 * Added a benchmark framework to track performance of functions in glibc.
3744 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3745 It is based on draft TS 18661 and currently enabled as a GNU extension.
3747 * On Linux, the clock function now uses the clock_gettime system call
3748 for improved precision, rather than old times system call.
3750 * Added support for version-3 tz format files. This is needed when using
3751 the tz database release 2013e or later, and affects a few unusual cases --
3752 currently only TZ='America/Godthab' for time stamps after 2037.
3754 * Added new API functions pthread_getattr_default_np and
3755 pthread_setattr_default_np to get and set the default pthread
3756 attributes of a process.
3758 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3759 This may improve lock scaling of existing programs on TSX capable systems.
3760 When the --enable-lock-elision=yes parameter is specified at configure
3761 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3764 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3765 availability). Implemented by Ryan S. Arnold.
3767 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3771 * The following bugs are resolved with this release:
3773 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3774 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3775 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3776 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3777 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3778 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3779 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3780 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3781 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3782 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3783 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3784 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3785 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3786 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3787 14879, 14889, 14893, 14898, 14914.
3789 * Optimization of memcpy for MIPS.
3791 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3792 EMFILE has been fixed (Bugzilla #14889).
3794 * The add-on ports collection is now distributed in the "ports" subdirectory
3795 of the main GNU C Library distribution, rather than separately.
3797 * Port to ARM AArch64 contributed by Linaro.
3799 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3800 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3802 Implemented by Andreas Krebbel.
3804 * The new function secure_getenv allows secure access to the environment,
3805 returning NULL if running in a SUID/SGID process. This function replaces
3806 the internal function __secure_getenv.
3808 * SystemTap static probes have been added into the dynamic linker.
3809 Implemented by Gary Benson.
3811 * Optimizations of string functions strstr, strcasestr and memmem.
3812 Implemented by Maxim Kuvyrkov.
3814 * The minimum Linux kernel version that this version of the GNU C Library
3815 can be used with is 2.6.16.
3817 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3818 powerpc POWER7. Implemented by Will Schmidt.
3820 * New configure option --disable-nscd builds the C library such that it
3821 never attempts to contact the Name Service Caching Daemon (nscd).
3822 New configure option --disable-build-nscd avoids building nscd itself;
3823 this is the default if --disable-nscd is used.
3825 * Improved support for cross-compilation, including cross-testing and
3826 bootstrap builds without a previously built glibc.
3828 * Several testsuite tests are now able to test multiple IFUNC variants of an
3829 interface, rather than just testing the one that would be chooen by
3832 * New configure options --with-bugurl and --with-pkgversion, for
3833 distributors to use to embed their bug-reporting and package version
3834 information in --help and --version output.
3836 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3837 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3838 allows creation of chroots without the procfs mounted on /proc.
3840 * The `crypt' function now fails if passed salt bytes that violate the
3841 specification for those values. On Linux, the `crypt' function will
3842 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3843 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3844 when the mode is enabled.
3846 * The `clock_*' suite of functions (declared in <time.h>) is now available
3847 directly in the main C library. Previously it was necessary to link with
3848 -lrt to use these functions. This change has the effect that a
3849 single-threaded program that uses a function such as `clock_gettime' (and
3850 is not linked with -lrt) will no longer implicitly load the pthreads
3851 library at runtime and so will not suffer the overheads associated with
3852 multi-thread support in other code such as the C++ runtime library.
3854 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3859 * The following bugs are resolved with this release:
3861 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3862 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3863 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3864 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3865 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3866 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3867 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3868 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3869 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3870 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3871 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3872 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3873 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3874 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3875 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3876 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3877 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3878 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3879 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3880 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3881 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3882 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3885 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3886 configuring glibc with:
3887 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3888 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
3889 Implemented by H.J. Lu.
3893 + define static_assert
3895 + do not declare gets
3897 + declare at_quick_exit and quick_exit also for ISO C11
3899 + aligned_alloc. NB: The code is deliberately allows the size parameter
3900 to not be a multiple of the alignment. This is a moronic requirement
3901 in the standard but it is only a requirement on the caller, not the
3904 + timespec_get added
3906 + uchar.h support added
3908 + CMPLX, CMPLXF, CMPLXL added
3910 Implemented by Ulrich Drepper.
3912 * Support for the IA-64 has been moved to ports.
3914 * Remove support for anything but ELF binary format
3916 * Checking versions of poll, ppoll added.
3917 Implemented by Ulrich Drepper.
3919 * More generic and 64-bit performance optimizations to math functions.
3920 Implemented by Ulrich Drepper.
3922 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3923 headers and functions available at compile time as they were before
3924 version 2.14. This option will be removed at some time in the future
3925 after the TI-RPC library becomes fully sufficient for the needs of
3926 existing applications.
3928 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3929 Note that glibc is not expected to work with any Linux kernel version
3932 * New header <sys/auxv.h> and function getauxval allowing easy access to
3933 the AT_* key-value pairs passed from the Linux kernel. The header also
3934 defines the HWCAP_* bits associated with the AT_HWCAP key.
3936 * New locales: mag_IN
3938 * New configure option --enable-systemtap builds SystemTap static probes
3939 into libc for setjmp and longjmp and into libpthread for various operations.
3940 So far the setjmp/longjmp probes and some of the libpthread probes are
3941 provided only for i*86 and x86_64.
3942 Implemented by Roland McGrath and Rayson Ho.
3944 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3946 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3949 * More optimized functions for SPARC. Implemented by David S. Miller.
3951 * Improved support for cross-compilation, especially bootstrap builds
3952 without a previously built glibc.
3954 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3955 Chris Metcalf from Tilera.
3957 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3958 now supported for ARM processors.
3960 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3961 as the name of the dynamic linker, to distinguish it from the
3962 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3964 * Support for CRIS has been removed from ports.
3966 * A new class of installed header has been documented for low-level
3967 platform-specific functionality. PowerPC added the first instance with a
3968 function to provide time base register access. Contributed by Tulio
3969 Magno Quites Machado Filho.
3971 * ix86 configurations now install header files that are consistent with
3972 what x86-64 configurations install. These same header files can be used
3973 for -m32, -m64, or -mx32 builds.
3974 Contributed by H.J. Lu.
3976 * Math library bug fixes. A thorough audit of all open math library bugs was
3977 conducted by Joseph Myers. Significant progress was made on many math
3978 library bugs resulting in more accurate exceptions and function results.
3979 Many thanks to all those that contributed including Andreas Jaeger for his
3980 patch review and work on the x87 trigonometric instruction issues.
3982 * Timezone data is no longer installed. Timezone-related binaries and scripts
3983 will continue to be installed. Users should obtain their timezone data from
3984 their distribution provider or from the tzdata package at
3985 <ftp://munnari.oz.au/pub/>.
3989 * The following bugs are resolved with this release:
3991 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3992 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3993 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3994 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3995 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3996 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3997 13484, 13506, 13515, 13523, 13524, 13538, 13540
3999 * New program pldd to list loaded object of a process
4000 Implemented by Ulrich Drepper.
4002 * Add nss_db support back to glibc. No more dependency on Berkeley db
4003 and support for initgroups lookups.
4004 Implemented by Ulrich Drepper.
4006 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
4007 Contributed by HJ Lu.
4009 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
4010 Contributed by HJ Lu.
4012 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
4013 on x86-32 and x86-64.
4014 Contributed by Liubov Dmitrieva.
4016 * Optimized strchr and strrchr for SSE on x86-32.
4017 Contributed by Liubov Dmitrieva.
4019 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
4020 for x86-64 and x86-32.
4021 Contributed by Liubov Dmitrieva.
4023 * New interfaces: scandirat, scandirat64
4024 Implemented by Ulrich Drepper.
4026 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
4027 Implemented by Ulrich Drepper.
4029 * nscd now also caches the netgroup database.
4030 Implemented by Ulrich Drepper.
4032 * Integrate libm with gcc's -ffinite-math-only option.
4033 Implemented by Ulrich Drepper.
4035 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
4036 to math functions. Implemented by Ulrich Drepper.
4038 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
4039 Implemented by Ulrich Drepper.
4041 * New Linux interfaces: process_vm_readv, process_vm_writev
4043 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
4044 Implemented by Ulrich Drepper.
4046 * Optimized nearbyint and strcasecmp for PPC.
4047 Implemented by Adhemerval Zanella.
4049 * New locales: bho_IN, unm_US, es_CU, ta_LK
4053 * The following bugs are resolved with this release:
4055 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
4056 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
4057 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
4058 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
4059 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
4060 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
4061 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
4062 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
4063 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
4064 12795, 12811, 12813, 12814, 12841
4066 * The RPC implementation in libc is obsoleted. Old programs keep working
4067 but new programs cannot be linked with the routines in libc anymore.
4068 Programs in need of RPC functionality must be linked against TI-RPC.
4069 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4071 Visible changes of this change include (obviously) the inability to link
4072 programs using RPC functions without referencing the TI-RPC library and the
4073 removal of the RPC headers from the glibc headers.
4074 Implemented by Ulrich Drepper.
4076 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4077 syncfs, setns, sendmmsg
4079 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4080 yue_HK, lij_IT, mhr_RU
4082 * New encodings: CP770, CP771, CP772, CP773, CP774
4084 * New program sotruss to trace calls through PLTs
4085 Implemented by Ulrich Drepper.
4087 * The malloc hook implementation is marked deprecated and will be removed
4088 from the default implementation in the next version. The design never
4089 worked ever since the introduction of threads. Even programs which do
4090 not create threads themselves can use multiple threads created internally.
4094 * The following bugs are resolved with this release:
4096 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4097 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4098 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4099 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4102 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4104 * POWER7 optimizations: memset, memcmp, strncmp
4106 * New optimized string functions for x86-64: strnlen (SSE2),
4107 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4108 Implemented by Ulrich Drepper.
4112 * The following bugs are resolved with this release:
4114 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4115 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4116 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4117 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4118 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4119 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4120 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4121 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4123 * New interfaces: pthread_getname_np, pthread_setname_np
4125 * New Linux interface: recvmmsg
4127 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4129 * The dynamic linker now recognizes supported ABI versions from the
4130 EI_ABIVERSION field in the ELF header.
4131 Implemented by Ulrich Drepper.
4133 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4134 will not be used to fill in password fields in the passwd.byname replies.
4135 Instead it is used to synthesize the shadow.byname table, should it be
4136 missing. This is a useful mode in some installations involving Solaris.
4137 Implemented by Ulrich Drepper.
4139 * New locales: kok_IN, sq_MK, cv_RU
4143 * The following bugs are resolved with this release:
4145 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4146 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4147 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4148 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4149 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4150 10789, 10817, 10823, 10840, 10847
4152 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4154 Implemented by Ulrich Drepper.
4156 * Checking version of longjmp added that fails if an uninitialized stack
4157 frame would be created. Implemented by Ulrich Drepper.
4159 * STT_GNU_IFUNC is now supported in static executables.
4160 Implemented by H.J. Lu.
4162 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4164 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4165 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4166 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4167 Contributed by H.J. Lu.
4169 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4170 Implemented by Ulrich Drepper.
4172 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4174 Contributed by H.J. Lu.
4176 * Support for fma instruction in AVX on x86-64.
4177 Implemented by H.J. Lu and Ulrich Drepper.
4179 * AVX support in x86-64 auditing support in ld.so.
4180 Implemented by H.J. Lu.
4182 * STB_GNU_UNIQUE support added.
4183 Implemented by Ulrich Drepper.
4185 * Implement second fallback mode for optimized DNS lookup for even more
4186 broken environments. If two requests from the same port are not
4187 handled correctly close the socket and open a new one before sending
4188 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4189 can be used to select this mode right away, instead of rediscovering the
4190 necessity is every process again.
4191 Implemented by Ulrich Drepper.
4193 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4194 Implemented by Adam Tkac.
4196 * Optimized iconv conversions for S390x.
4197 Implemented by Andreas Krebbel.
4199 * Using condvars with PI mutexes is now more efficient due to kernel
4200 support for requeueing to PI futexes. NPTL support added for x86-64.
4201 Implemented by Ulrich Drepper.
4203 * New locales: ps_AF, my_MM
4207 * The following bugs are resolved with this release:
4209 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4210 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4211 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4212 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4213 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4215 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4216 Implemented by Ulrich Drepper.
4218 * New Linux interfaces: accept4, fallocate, fallocate64.
4219 Implemented by Ulrich Drepper.
4221 * Correct declarations of string function when used in C++ code. This
4222 could lead to compile errors for invalid C++ code.
4224 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4227 * New POSIX 2008 interface: psiginfo
4228 Implemented by Ulrich Drepper.
4230 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4231 Implemented by Ulrich Drepper.
4233 * Support for selecting between multiple function definitions at runtime
4234 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4236 * The libcrypt library can now use the hash function implementations in
4237 NSS. Implemented by Ulrich Drepper.
4239 * The malloc implementation can be compiled to be less memory efficient
4240 but higher performing in multi-threaded programs.
4241 Implemented by Ulrich Drepper.
4243 * New locales: nan_TW@latin, ks_IN
4245 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4246 Implemented by Ulrich Drepper.
4248 * Extended printf hook support. It is possible to use user-defined types
4249 and extend existing format specifiers.
4250 Implemented by Ulrich Drepper.
4252 * Handling for group shadow files has been added.
4253 Implemented by Ulrich Drepper.
4255 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4256 servers (the case, e.g., for some people using the built-in DNS
4257 server in ADSL modems/routers). There is a once-per-process timeout
4258 in case of a broken server. To avoid it, users can run nscd or put
4259 'options single-request' in /etc/resolv.conf.
4260 Implemented by Ulrich Drepper.
4264 * The following bugs are resolved with this release:
4266 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4267 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4268 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4269 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4270 6968, 6974, 6980, 6995, 7008, 7009, 7029
4272 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4273 up at the same time. Implemented by Ulrich Drepper.
4275 * TLS descriptors for LD and GD on x86 and x86-64.
4276 Implemented by Alexandre Oliva.
4278 * getaddrinfo now handles DCCP and UDPlite.
4279 Implemented by Ulrich Drepper.
4281 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4282 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4283 Implemented by Ulrich Drepper.
4285 * New implementation of memmem, strstr, and strcasestr which is O(n).
4286 Implemented by Eric Blake.
4288 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4290 * Implement "e" option for popen to open file descriptor with the
4291 close-on-exec flag set. Implemented by Ulrich Drepper.
4293 * Implement "b" mode for fmemopen. In this mode writes writes don't
4294 implicitly add a NUL byte and seeks from the end of the buffer really
4295 use the buffer end, not the string length as the basis.
4296 Implemented by Ulrich Drepper.
4298 * Many functions, exported and internal, now atomically set the close-on-exec
4299 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4301 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4303 Implemented by Pravin Satpute.
4305 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4309 * The following bugs are resolved with this release:
4311 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4312 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4313 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4314 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4315 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4316 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4317 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4319 * New locales: bo_CN, bo_IN, shs_CA.
4321 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4323 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4324 Implemented by Pravin Satpute.
4326 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4328 * nscd caches now all timeouts for DNS entries
4329 Implemented by Ulrich Drepper.
4331 * nscd is more efficient and wakes up less often.
4332 Implemented by Ulrich Drepper.
4334 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4335 vdprintf, and obstack_vprintf.
4336 Implemented by Jakub Jelinek.
4338 * Faster memset for x86-64.
4339 Implemented by Harsha Jagasia and H.J. Lu.
4341 * Faster memcpy on x86.
4342 Implemented by Ulrich Drepper.
4344 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4345 Implemented by Ulrich Drepper.
4347 * Faster sqrt and sqrtf implemention for some PPC variants.
4348 Implemented by Steven Munroe.
4352 * The following bugs are resolved with this release:
4354 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4355 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4356 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4357 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4358 5071, 5103, 5104, 5112, 5113, 5184, 5186
4360 * More checking functions: fread, fread_unlocked, open*, mq_open.
4361 Implemented by Jakub Jelinek and Ulrich Drepper.
4363 * Extend fortification to C++. Implemented by Jakub Jelinek.
4365 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4366 by not recognizing 'a' as a modifier when those specs are requested.
4367 Implemented by Jakub Jelinek.
4369 * PPC optimizations to math and string functions.
4370 Implemented by Steven Munroe.
4372 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4373 options to be passed. Implemented by Ulrich Drepper.
4375 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4377 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4378 Implemented by Ulrich Drepper.
4380 * Handle private futexes in the NPTL implementation.
4381 Implemented by Jakub Jelinek and Ulrich Drepper.
4383 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4384 Implemented by Roland McGrath and Ulrich Drepper.
4386 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4388 * SHA-256 and SHA-512 based password encryption.
4389 Implemented by Ulrich Drepper.
4391 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4392 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4395 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4396 Implemented by Ulrich Drepper.
4400 * The following bugs are resolved with this release:
4402 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4403 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4404 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4405 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4406 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4407 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4408 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4411 * New Linux interfaces: epoll_pwait, sched_getcpu.
4413 * New generic interfaces: strerror_l.
4415 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4419 * The following bugs are resolved with this release:
4421 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4422 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4423 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4424 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4425 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4426 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4427 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4428 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4429 3225, 3251, 3252, 3253, 3273
4431 * For Linux, the sorting of addresses returned by getaddrinfo now also
4432 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4433 Implemented by Ulrich Drepper.
4435 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4436 Implemented by Ulrich Drepper.
4438 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4440 * New iconv module for MIK. Contributed by Alexander Shopov.
4442 * For sites with broken group and/or passwd database, the auto-propagate
4443 option of nscd can prevent creating ID lookup entries from the results
4444 of a name lookup and vice versa. This usually is no problem but some
4445 site might have problems with the default behavior.
4446 Implemented by Ulrich Drepper.
4448 * Iterating over entire database in NIS can be slow. With the
4449 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4450 to trade time for memory. The entire database will be read at once.
4451 Implemented by Ulrich Drepper.
4453 * The interfaces introduced in RFC 3542 have been implemented by
4456 * Support for the new ELF hash table format was added by Ulrich Drepper.
4458 * Support for priority inheritance mutexes added by Jakub Jelinek and
4461 * Support for priority protected mutexes added by Jakub Jelinek.
4463 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4464 or_IN, csb_PL, fy_NL, sr_ME.
4468 * More overflow detection functions.
4470 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4471 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4473 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4474 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4475 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4476 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4477 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4478 by Masahide Washizawa.
4480 * It is now possible to install audit libraries for the dynamic linker using
4481 LD_AUDIT. Implemented by Ulrich Drepper.
4483 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4484 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4485 For a libc and libpthread that works well on Linux 2.4 kernels, we
4486 recommend using the stable 2.3 branch.
4488 * The new function open_wmemstream acts like open_memstream,
4489 but uses a wchar_t wide character buffer.
4491 * The new function ppoll is an improved version of poll, similar to pselect.
4493 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4494 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4495 renameat, unlinkat, linkat, symlinkat, readlinkat.
4497 * New Linux kernel system calls: unshare,
4498 inotify_init, inotify_add_watch, inotify_rm_watch.
4500 * The euidaccess function is now also known by the alias eaccess,
4501 for compatibility with some other systems.
4503 * Timezone data updated to 2006b version.
4507 * The following bugs are resolved with this release:
4509 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4510 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4511 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4512 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4513 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4514 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4516 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4518 * As of this release, GCC 4 can be used to compile the C Library.
4520 * Timezone data updated to 2005m version.
4524 * The following bugs are resolved with this release:
4526 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4527 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4528 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4529 777, 787, 821, 822, 823, 825
4531 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4535 * Support for RFC 3678. Real implementations exist only for Linux so far.
4536 Implemented by Ulrich Drepper.
4538 * nscd can now cache entries persistently. Expiring entries are reloaded.
4539 For speedups the cache can be shared in memory with client processes.
4540 Implemented by Ulrich Drepper.
4542 * nscd can now perform SELinux checks.
4543 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4545 * getaddrinfo queries are now cached. Canonical name lookup is performed
4547 Implemented by Ulrich Drepper.
4549 * The nothrow function attribute is used when headers are used by gcc when
4550 compiling C code. This can avoid significant amounts of exception
4553 * The malloc functions perform more error checking and are stricter when
4554 it comes to reacting on errors. The default action is to terminate
4555 the process after showing an error message. Implemented by Ulrich Drepper.
4557 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4558 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4560 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4561 namespaces using the new function dlmopen(). This feature is of course,
4562 like most other dynamic loading functionality, not available in statically
4563 linked applications. Implemented by Ulrich Drepper.
4565 * Low-overhead boundary checking variants of string and some stdio functions
4566 were added. These are to be used in conjunction with a gcc patch by
4567 Jakub Jelinek which adds calls to these functions if possible.
4568 Implemented by Jakub Jelinek and Ulrich Drepper.
4570 * Old code for several operating systems and machine architectures that
4571 have not been in working condition in a long time have been removed from
4572 the main source tree maintained by the GNU C Library's maintainers.
4573 These files are now reside in the separate `ports' source module
4574 that is usable as an add-on when building the library.
4578 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4579 interrogate the dynamic linker, compatible with the Solaris interface.
4581 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4582 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4584 * getifaddrs now uses the netlink interface on Linux to get its information.
4585 Implemented by Thorsten Kukuk.
4587 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4588 Implemented by Ulrich Drepper.
4590 * support for non-executable stacks on x86 has been added. Changes mostly
4593 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4596 * getaddrinfo now performs destination address selection according to
4601 * Thread-safe interfaces for many functions that access locale data
4602 were added in version 2.3, but these features were omitted from NEWS.
4603 Many functions have variants with an `_l' suffix that take a `locale_t'
4604 object as a parameter rather than consulting the current locale.
4605 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4606 create and maintain `locale_t' objects. Additionally, the new function
4607 `uselocale' sets "the current locale" (as used by functions not so
4608 parameterized) set for an individual thread. These features were added
4609 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4611 * The functions getresuid, getresgid, setresuid, and setresgid, which
4612 have long been available on Linux, are now declared in <unistd.h>
4613 and are now also available on the Hurd.
4615 * ELF thread-local storage support (TLS) now works on x86-64.
4617 * The new dynamic string token $LIB is expanded in shared library names.
4618 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4620 * Aldy Hernandez contributed complete software floating point support for
4621 PowerPC machines with no FPU.
4623 * fexecve is implemented on Linux.
4625 * The `btowc' function should work at least twice as fast due to
4626 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4628 * With approriate thread add-ons cancelable functions are now implemented
4629 in libc.so as well. No need to call the function in libpthread. This
4630 change allowed to finally disable the incorrect and expensive handling
4631 of weak definition in ld.so.
4633 * Yet more PLT entries in libc.so have been removed. We finally arrived
4634 at the bare minimum. Startup times improved appropriately.
4636 * Support for the new Linux/x86 system call interface was added. The
4637 AT_SYSINFO auxiliary vector entry is recognized and handled.
4641 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4644 * iconv (the program and the interface) now accepts empty names (excluding
4645 options like //TRANSLIT) to mean "use charset of current locale".
4647 * localedef can now transliterate characters in strings which are not in
4648 the provided charmap. The information from the input locale is used.
4650 * Prelinking support was added for ELF targets. This requires additional
4651 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4653 * Read-only stdio streams now use mmap to speed up operation by eliminating
4654 copying and buffer underflows. To use add 'm' to the mode string of
4655 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4657 * The malloc functions were completely rewritten by Wolfram Gloger based
4658 on Doug Lea's malloc-2.7.0.c.
4660 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4661 implementation of regex.
4663 * Bruno Haible upgraded the iconv and locale implementation to support
4666 * Contents of the LC_* and LANG environment variables in the CEN style are
4667 not recognized anymore. It never was used. Change by Ulrich Drepper.
4669 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4670 thread-local storage (TLS) ABI on some platforms.
4671 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4673 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4674 EUC-JISX0213, and TSCII.
4676 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4677 BSD-compatible interface for getting all network interface addresses.
4678 Implementation for IPv4 by Roland McGrath.
4680 * Loading of locale data is faster due to the introduction of a locale
4681 archive. Implemented by Roland McGrath and Ulrich Drepper.
4683 * Startup times are significantly reduced by not using exported functions
4684 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4687 * Steven Munroe contributed a port to PowerPC64/Linux.
4691 * The Hurd now uses the GNU libio implementation of stdio rather than the
4692 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4694 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4695 with the same behavior as the Linux system call of the same name.
4699 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4700 128-bit long double format.
4702 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4703 IBM1161, and IBM1162 charsets.
4705 * Andreas Jaeger contributed a port to x86-64/Linux.
4707 * Peter Bruin contributed a port to PowerPC/Hurd.
4709 * libc functions using I/O streams now can handle wide-oriented streams
4712 * optimizations in the dynamic linker. Binaries created by recent binutils
4713 versions start up quicker due to reduced time spent on relocations.
4715 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4719 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4720 asinh, atanh, j0 for the 128-bit long double format.
4722 * Bruno Haible updated all the code handling Unicode in some form to
4723 support Unicode 3.1.
4725 * Speed of regex for single-byte locales is back to previous levels.
4726 Patch by Isamu Hasegawa.
4728 * Alpha, SPARC, and IA-64 now also using floating stacks.
4730 * Startup time of internationalized applications greatly improved through
4731 iconv cache. Use iconvconfig to generate the cache file.
4732 Contributed by Ulrich Drepper.
4734 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4735 severe performance problems. Patch by David Mosberger.
4737 * The Hurd port got a lot more functionality like AIO, various stdio
4738 extensions, etc. Mainly done by Roland McGrath.
4740 * mtrace can now lookup symbols in shared libraries.
4744 * Intel's IA-64 math library is largely integrated. It provides fast and
4745 accurate implementatations for most basic and standard math functions
4746 in float, double, and long double format.
4748 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4749 and asin for the 96-bit long double format and asin, log, tan for the
4750 128-bit long double format.
4752 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4753 The basic double functions exist today. Contributed by Abraham Ziv
4754 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4755 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4757 * An asynchronous name lookup library was added. The interface is designed
4758 after POSIX AIO. The proposal was circulated beforehand to get comments.
4759 No negative ones came in. Implemented by Ulrich Drepper.
4761 * Port to S390/64bit contributed by Martin Schwidefsky
4762 <schwidefsky@de.ibm.com>.
4764 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4765 of functions for Linux/IA-64.
4767 * The RPC code is now thread safe. Threads can now use the same service
4768 of different services at the same time. Patch by Eric Norum
4769 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4771 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4772 family of functions for Linux/S390.
4774 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4775 of functions for Linux/x86.
4777 * Port to Linux/CRIS contributed by Axis Communications.
4781 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4782 we can now check for namespace violations and missing declarations. The
4783 result is that almost all headers are now Unix-compliant (as defined in
4784 the upcoming XPG6). The negative side is that some programs might need
4785 corrections, too, if they depend on the incorrect form of the headers in
4786 previous versions which defined too many symbols and included too many
4789 * regex now handles multibyte character sets correctly.
4790 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4792 * iconv (the program) does now conform to the upcoming XPG6 and handles
4793 charmaps. Instead of the charset names the path of charmaps can be
4794 provided and the conversion happens based on this data.
4795 Contributed by Ulrich Drepper.
4797 * The locale program now provides detailed information about the installed
4802 only lists the names of the supported locales
4806 provides details such as country, language, and codeset name.
4807 Contributed by Ulrich Drepper.
4811 * The gencat program now parses the input file according to the charset
4812 selected by the LC_CTYPE category. This is important for stateful
4813 character sets. To make generating catalogs easier there is a way
4814 to overwrite the charset selected by the locale: before the first
4815 message or $ quote line the catalog can contain a line like
4817 $ codeset=ISO-8859-2
4819 to select the charset (ISO-8859-2 in this case).
4821 Implemented by Shinya Hanataka and Ulrich Drepper.
4823 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4824 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4825 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4827 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4828 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4830 * The LANGUAGE environment variable is now ignored unless the locale is
4831 changed from the default "C" locale.
4833 * The usual bug fixes.
4837 * Greg McGary added runtime support for bounds checking using gcc's
4838 new -fbounded-pointers option. ix86 target is complete. PowerPC
4841 * Thorsten Kukuk added secure mode support to nscd.
4843 * The Berkeley db libraries have been removed.
4845 Related, the nss_db module is now in a separate package since it
4846 obviously requires a database library being available.
4848 * Wide character I/O streams implemented by Ulrich Drepper.
4850 * Functions from the extended socket API added by Ulrich Drepper.
4852 * Functions feenableexcept and fedisableexcept to control the
4853 behaviour of individual exceptions have been added by Andreas Jaeger.
4855 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4857 * The resolver code has been updated from bind 8.2.3-T5B which supports
4858 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4861 This change could in some situations effect backward compatibility. Since
4862 now `_res' is a thread-local instead of a global variable, modifying it
4863 in one thread does not have any effect in other threads.
4865 The resolver library was also extended to allow IPv6 as the transport
4866 protocol for the requests. This work was done by Stig Venaas.
4868 * Compatibility code for K&R C compilers has been removed from the
4869 header files. A ISO C compiler is needed to use the library
4870 (conforming to either C89 or C99 standard).
4872 * Complete rewrite of the localedef program to support multibyte character
4873 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4874 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4875 Implemented by Ulrich Drepper.
4877 Bruno Haible significantly improved the generation and use of the data
4878 structures for the wide character tables.
4880 * Plural handling in gettext implemented by Ulrich Drepper.
4882 * The utmp daemon has been removed.
4884 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4886 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4889 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4891 * POSIX barriers implemented by Kaz Kylheku.
4893 * POSIX spawn function family implemented by Ulrich Drepper.
4895 * POSIX spinlocks are now available.
4897 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4899 * the configure option --enable-kernel=X.Y.Z allows to strip out
4900 compatibility for kernel versions before X.Y.Z. This is currently only
4901 implemented for Linux.
4903 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4904 field sin6_scope_id. This means that all programs using IPv6 should be
4905 recompiled. Don't expect binary compatibility with previous glibc
4908 * various conversion modules for IBM character sets contributed by
4911 * IA-64 port by Jes Sorensen and HJ Lu.
4925 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4927 * New xdr functions are added; some rpc functions are now 64bit clean.
4929 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4931 * Fixed known incompatibilities with glibc 2.0.
4933 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4935 * Optimized a number of functions (especially the ELF dynamic loader).
4937 * Update timezone data files.
4939 * lots of charmaps corrections
4941 * some new locale definitions and charmaps
4946 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4947 conform to POSIX member type requirements. Symbol versions have been
4948 adjusted as needed within the library, and for direct use by applications,
4949 but there is potential for problems if third-party libraries use
4950 struct timeval as part of their interface. This does not present
4951 a problem for X and other "essential" system libraries.
4953 * An additional locale model to support C++ Standard Library locale
4954 model and probably more was implemented by Ulrich Drepper.
4956 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4959 * Miles Bader provided the `argp' function family to support hierachical
4960 command line argument parsing, layered on top of getopt.
4962 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4964 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4967 * scanf recognizes the %a and %A format for scanning floating point numbers.
4969 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4970 information and interfaces for the available integer types.
4972 * about 130 new math functions were added to implement the ISO C9x math
4975 * the new header <complex.h> contains definitions of the complex math
4976 functions from ISO C 9X.
4978 * the new header <tgmath.h> defines generic macros to use complex or
4979 real valued functions.
4981 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4983 * Andreas Jaeger provided a test suite for the math library.
4985 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4987 * Ulrich Drepper added character set conversion functions (iconv).
4989 * Optimized string functions have been added.
4991 * The localedata addon is now part of glibc.
4993 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4995 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4996 daemon for NSS (nscd).
4998 Missing a better place here are some numbers on improvements. Under
4999 Linux 2.1.125 un-tar-ing the kernel sources takes
5003 using local files 12.19s 6.88s 22.91s
5005 using NIS 13.92s 8.91s 26.34s
5007 using NIS & nscd 10.37s 7.34s 25.30s
5009 using NIS+ 27.57s 30.37s 640.46s
5011 using NIS+ & nscd 10.25s 7.83s 26.51s
5013 using NIS & old nscd [1] 13.83s 8.32s 29.60s
5015 Keep in mind that non-namelookup related operations dominate above times.
5016 It was just a common complain that using NIS+ unpacking the kernel is
5019 [1] The old nscd implementation is not available anymore since it was
5020 distributed with glibc up to version 2.0.98 and thus is now replaced.
5022 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
5024 * Mark Kettenis provided a Hesiod NSS module.
5026 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
5027 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
5029 * rcmd can now handle netgroups (Dick Streefland).
5031 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
5034 * Support for the IPv6 protocol has been added to the socket API, as per the
5035 latest draft standards.
5037 * Support for Linux 2.2 has been added.
5039 * Interface changes relative to the latest 2.0.x release:
5040 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5041 addseverity NEW: Unix98
5042 alphasort64 NEW: LFS
5043 argp_err_exit_status NEW: argp, GNU ext
5044 argp_error NEW: argp, GNU ext
5045 argp_failure NEW: argp, GNU ext
5046 argp_help NEW: argp, GNU ext
5047 argp_parse NEW: argp, GNU ext
5048 argp_program_bug_address NEW: argp, GNU ext
5049 argp_program_version NEW: argp, GNU ext
5050 argp_program_version_hook NEW: argp, GNU ext
5051 argp_state_help NEW: argp, GNU ext
5052 argp_usage NEW: argp, GNU ext
5053 authdes_create NEW: Secure RPC
5054 authdes_getucred NEW: Secure RPC
5055 authdes_pk_create NEW: Secure RPC
5056 backtrace NEW: GNU ext.
5057 backtrace_symbols NEW: GNU ext.
5058 backtrace_symbols_fd NEW: GNU ext.
5060 cacosf NEW: ISO C 9x
5061 cacosh NEW: ISO C 9x
5062 cacoshf NEW: ISO C 9x
5063 cacoshl NEW: ISO C 9x
5064 cacosl NEW: ISO C 9x
5071 casinf NEW: ISO C 9x
5072 casinh NEW: ISO C 9x
5073 casinhf NEW: ISO C 9x
5074 casinhl NEW: ISO C 9x
5075 casinl NEW: ISO C 9x
5077 catanf NEW: ISO C 9x
5078 catanh NEW: ISO C 9x
5079 catanhf NEW: ISO C 9x
5080 catanhl NEW: ISO C 9x
5081 catanl NEW: ISO C 9x
5082 cbc_crypt NEW: Secure RPC
5086 ccoshf NEW: ISO C 9x
5087 ccoshl NEW: ISO C 9x
5093 cimagf NEW: ISO C 9x
5094 cimagl NEW: ISO C 9x
5095 clearerr_locked REMOVED
5096 clntunix_create NEW: sunrpc ext
5098 clog10 NEW: ISO C 9x
5099 clog10f NEW: ISO C 9x
5100 clog10l NEW: ISO C 9x
5110 cprojf NEW: ISO C 9x
5111 cprojl NEW: ISO C 9x
5113 crealf NEW: ISO C 9x
5114 creall NEW: ISO C 9x
5119 csinhf NEW: ISO C 9x
5120 csinhl NEW: ISO C 9x
5123 csqrtf NEW: ISO C 9x
5124 csqrtl NEW: ISO C 9x
5128 ctanhf NEW: ISO C 9x
5129 ctanhl NEW: ISO C 9x
5131 des_setparity NEW: Secure RPC
5132 ecb_crypt NEW: Secure RPC
5133 endutxent NEW: Unix98
5135 exp10f NEW: ISO C 9x
5136 exp10l NEW: ISO C 9x
5140 fattach NEW: STREAMS
5141 fdetach NEW: STREAMS
5145 feclearexcept NEW: ISO C 9x
5146 fegetenv NEW: ISO C 9x
5147 fegetexceptflag NEW: ISO C 9x
5148 fegetround NEW: ISO C 9x
5149 feholdexcept NEW: ISO C 9x
5151 feraiseexcept NEW: ISO C 9x
5152 ferror_locked REMOVED
5153 fesetenv NEW: ISO C 9x
5154 fesetexceptflag NEW: ISO C 9x
5155 fesetround NEW: ISO C 9x
5156 fetestexcept NEW: ISO C 9x
5157 feupdateenv NEW: ISO C 9x
5158 fflush_locked REMOVED
5162 fgets_unlocked NEW: GNU ext.
5163 fileno_locked REMOVED
5175 fputc_locked REMOVED
5176 fputs_unlocked NEW: GNU ext.
5177 fread_unlocked NEW: GNU ext.
5182 fstatvfs NEW: Unix98
5186 ftruncate64 NEW: LFS
5188 fwrite_unlocked NEW: GNU ext.
5189 gai_strerror NEW: IPv6
5193 getchar_locked REMOVED
5195 getdate_err NEW: Unix98
5196 getdate_r NEW: GNU ext.
5198 getnameinfo NEW: IPv6
5199 getnetname NEW: Secure RPC
5200 getpmsg NEW: STREAMS
5201 getpt NEW: Unix98 PTY
5202 getrlimit64 NEW: LFS
5203 getutxent NEW: Unix98
5204 getutxid NEW: Unix98
5205 getutxline NEW: Unix98
5206 glob64 NEW: GNU ext.
5207 globfree64 NEW: GNU ext.
5208 gnu_get_libc_release NEW: GNU ext.
5209 gnu_get_libc_version NEW: GNU ext.
5210 grantpt NEW: Unix98 PTY
5211 host2netname NEW: Secure RPC
5213 iconv_close NEW: iconv
5214 iconv_open NEW: iconv
5215 if_freenameindex NEW: IPv6
5216 if_indextoname NEW: IPv6
5217 if_nameindex NEW: IPv6
5218 if_nametoindex NEW: IPv6
5219 in6addr_any NEW: IPv6
5220 in6addr_loopback NEW: IPv6
5221 inet6_isipv4mapped NEW: IPv6
5222 isastream NEW: STREAMS
5223 iswblank NEW: GNU ext.
5224 key_decryptsession NEW: Secure RPC
5225 key_decryptsession_pk NEW: Secure RPC
5226 key_encryptsession NEW: Secure RPC
5227 key_encryptsession_pk NEW: Secure RPC
5228 key_gendes NEW: Secure RPC
5229 key_get_conv NEW: Secure RPC
5230 key_secretkey_is_set NEW: Secure RPC
5231 key_setnet NEW: Secure RPC
5232 key_setsecret NEW: Secure RPC
5233 llrint NEW: ISO C 9x
5234 llrintf NEW: ISO C 9x
5235 llrintl NEW: ISO C 9x
5236 llround NEW: ISO C 9x
5237 llroundf NEW: ISO C 9x
5238 llroundl NEW: ISO C 9x
5243 lrintf NEW: ISO C 9x
5244 lrintl NEW: ISO C 9x
5245 lround NEW: ISO C 9x
5246 lroundf NEW: ISO C 9x
5247 lroundl NEW: ISO C 9x
5249 makecontext NEW: Unix98
5250 mempcpy NEW: GNU ext.
5253 modify_ldt NEW: kernel
5257 nearbyint NEW: ISO C 9x
5258 nearbyintf NEW: ISO C 9x
5259 nearbyintl NEW: ISO C 9x
5260 netname2host NEW: Secure RPC
5261 netname2user NEW: Secure RPC
5262 nexttoward NEW: ISO C 9x
5263 nexttowardf NEW: ISO C 9x
5264 nexttowardl NEW: ISO C 9x
5268 passwd2des NEW: Secure RPC
5270 pow10f NEW: GNU ext.
5271 pow10l NEW: GNU ext.
5274 printf_size NEW: GNU ext.
5275 printf_size_info NEW: GNU ext.
5276 profil_counter REMOVED
5277 pthread_mutexattr_getkind_np REPLACED
5278 pthread_mutexattr_setkind_np REPLACED
5279 ptsname NEW: Unix98 PTY
5280 ptsname_r NEW: Unix98 PTY
5282 putchar_locked REMOVED
5283 putgrent NEW: GNU ext.
5285 putpmsg NEW: STREAMS
5286 pututxline NEW: Unix98
5290 readdir64_r NEW: LFS
5291 remquo NEW: ISO C 9x
5292 remquof NEW: ISO C 9x
5293 remquol NEW: ISO C 9x
5295 roundf NEW: ISO C 9x
5296 roundl NEW: ISO C 9x
5298 scalbln NEW: ISO C 9x
5299 scalblnf NEW: ISO C 9x
5300 scalblnl NEW: ISO C 9x
5302 sendfile NEW: kernel
5303 setcontext NEW: Unix98
5304 setrlimit64 NEW: LFS
5305 setutxent NEW: Unix98
5307 sigignore NEW: Unix98
5308 sigqueue NEW: POSIX.1b
5309 sigrelse NEW: Unix98
5310 sigset NEW: POSIX.1b
5311 sigtimedwait NEW: POSIX.1b
5312 sigwaitinfo NEW: POSIX.1b
5313 sincos NEW: GNU ext.
5314 sincosf NEW: GNU ext.
5315 sincosl NEW: GNU ext.
5319 strcasestr NEW: GNU ext.
5320 strtoimax NEW: ISO C 9x
5321 strtoumax NEW: ISO C 9x
5322 strverscmp NEW: GNU ext.
5323 svcauthdes_stats NEW: Secure RPC
5324 svcunix_create NEW: sunrpc etx
5325 svcunixfd_create NEW: sunrpc ext
5326 swapcontext NEW: Unix98
5327 tcgetsid NEW: Unix98 PTY
5328 tdestroy NEW: GNU ext.
5329 tgamma NEW: ISO C 9x
5330 tgammaf NEW: ISO C 9x
5331 tgammal NEW: ISO C 9x
5335 truncf NEW: ISO C 9x
5336 truncl NEW: ISO C 9x
5338 unlockpt NEW: Unix98 PTY
5339 updwtmpx NEW: Unix98
5340 user2netname NEW: Secure RPC
5341 utmpxname NEW: Unix98
5342 versionsort NEW: GNU ext.
5343 versionsort64 NEW: GNU ext.
5345 wcscasecmp NEW: GNU ext.
5346 wcsncasecmp NEW: GNU ext.
5347 wcsnlen NEW: GNU ext.
5348 wcstoimax NEW: ISO C 9x
5349 wcstoll NEW: ISO C 9x
5350 wcstoull NEW: ISO C 9x
5351 wcstoumax NEW: ISO C 9x
5353 wordexp NEW: POSIX.2
5354 wordfree NEW: POSIX.2
5355 write_profiling REMOVED
5356 xdecrypt NEW: Secure RPC
5357 xdr_authdes_cred NEW: Secure RPC
5358 xdr_authdes_verf NEW: Secure RPC
5359 xdr_cryptkeyarg NEW: Secure RPC
5360 xdr_cryptkeyarg2 NEW: Secure RPC
5361 xdr_cryptkeyres NEW: Secure RPC
5362 xdr_getcredres NEW: Secure RPC
5363 xdr_key_netstarg NEW: Secure RPC
5364 xdr_key_netstres NEW: Secure RPC
5365 xdr_keybuf NEW: Secure RPC
5366 xdr_keystatus NEW: Secure RPC
5367 xdr_netnamestr NEW: Secure RPC
5368 xdr_sizeof NEW: Secure RPC
5369 xdr_unixcred NEW: sunrpc ext
5370 xencrypt NEW: Secure RPC
5371 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5382 * inet_ntoa is thread-safe
5384 * updwtmp is moved from libutil to libc
5386 * rewrite of cbrt function
5388 * update of timezone data
5402 * add atoll function
5404 * fix complex problems in Berkeley DB code
5406 * fix math functions
5410 * fixed lots of header problems (especially Linux/GNU specific)
5412 * dynamic loader preserves all registers
5414 * Roland McGrath provided support for handling of auxiliary objects in
5415 the ELF dynamic loader.
5417 * support for parallel builds is improved
5421 * GNU extensions are no longer declared by default. To enable them you
5422 must define the macro `_GNU_SOURCE' in your program or compile with
5425 * The library has changed from using GNU ld symbol aliases to using weak
5426 symbols where available. The ELF object file format supports weak
5427 symbols; GNU ld also supports weak symbols in the a.out format. (There
5428 is also now support for other GNU ld extensions in ELF. Use the
5429 `--with-elf' option to configure to indicate you have ELF, and
5430 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5431 of many files which contained only symbol aliases, reducing the size of
5432 the source and the compiled library; many other files were renamed to
5433 less cryptic names previously occupied by the symbol alias files.
5434 There is a new header file <elf.h> for programs which operate on
5435 files in the ELF format.
5437 * Converted to Autoconf version 2, so `configure' has more options.
5438 Run `configure --help' to see the details.
5440 * The library can now be configured to build profiling, highly-optimized
5441 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5442 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5443 `configure' enable building these extra libraries. The shared library is
5444 built by default when using both ELF and GNU ld. When shared libraries
5445 are enabled, the new library `-ldl' is available for arbitrary run-time
5446 loading of shared objects; its interface is defined in <dlfcn.h>. The
5447 new header file <link.h> gives access to the internals of the run-time
5448 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5449 application of same name on other systems and it provides information
5450 about dynamically linked binaries.
5452 * The C library now provides the run-time support code for profiling
5453 executables compiled with `-pg'. Programs can control the profiling code
5454 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5455 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5456 the support for this file format was contributed by David Mosberger-Tang.
5458 * The math code has been replaced with a math library based on fdlibm from
5459 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5460 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5461 functions. The math functions now reside in a separate library, so
5462 programs using them will need to use `-lm' their linking commands.
5464 * John C. Bowman contributed optimized ix87 assembler inline functions.
5466 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5467 mechanism similar to that found in Solaris 2. This is now used for the
5468 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5469 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5470 file controls what services are used for each individual database. This
5471 works by loading shared libraries with names specified in `nsswitch.conf',
5472 so service modules can be changed or added at any time without even
5473 relinking any program. Currently there are the file, db, and NIS based
5474 NSS services available.
5476 * The new functions `strtoq' and `strtouq' parse integer values from
5477 strings, like `strtol' and `strtoul', but they return `long long int' and
5478 `unsigned long long int' values, respectively (64-bit quantities).
5480 * The new functions `strtof' and `strtold' parse floating-point values from
5481 strings, like `strtod', but they return `float' and `long double' values,
5482 respectively (on some machines `double' and `long double' are the same).
5484 * Ulrich Drepper has contributed new implementations of the floating-point
5485 printing and reading code used in the `printf' family of functions and
5486 `strtod', `strtof', and `strtold'. These new functions are perfectly
5487 accurate, and much faster than the old ones.
5489 * The implementation of the POSIX locale model was completely rewritten by
5490 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5491 to compile the POSIX locale definition.
5493 * The former dummy implementations of the strcoll and strxfrm function are
5494 now replaced by fully functional code contributed by Ulrich Drepper. The
5495 collation information comes from the POSIX locale definitions.
5497 * The new header <langinfo.h> defines an interface for accessing
5498 various locale-dependent data (using the locale chosen with `setlocale').
5500 * Ulrich Drepper has contributed a new suite of functions for operation on
5501 wide-character and multibyte-character strings, in <wchar.h>;
5502 and classification and case conversion of wide characters, in <wctype.h>.
5503 These new functions are conforming to the ISO C, Amendement 1 specification.
5505 * There is now a second implementation of the standard I/O library available.
5506 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5507 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5509 * You can now use positional parameter specifications in format strings
5510 for the `printf' and `scanf' families of functions. For example,
5511 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5512 ``Number 6, Mr Jones''. This is mainly useful when providing different
5513 format strings for different languages, whose grammars may dictate
5514 different orderings of the values being printed. To support this
5515 feature, the interface for `register_printf_handler' has changed; see
5516 the header file <printf.h> for details.
5518 * The `printf' and `scanf' families of functions now understand a new
5519 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5520 to group numbers as indicated by the locale; for `scanf' and friends, this
5521 says to accept as valid only a number with all the proper grouping
5522 separators in the right places. In the default "C" locale, numbers are
5523 not grouped; but locales for specific countries will define the usual
5524 conventions (i.e. separate thousands with `,' in the US locale).
5526 * The pgrp functions have been regularized, slightly incompatibly but much
5527 less confusingly. The core functions are now `getpgid' and `setpgid',
5528 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5529 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5530 provided for compatibility. There is no longer an incompatible `getpgrp'
5531 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5533 * The new header file <fts.h> and suite of functions simplify programs that
5534 operate on directory trees. This code comes from 4.4 BSD.
5536 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5537 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5538 NSS scheme used in glibc.
5540 * There is a new malloc debugging hook `__memalign_hook'.
5542 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5543 `unsigned int' in <sys/types.h>. These are for compatibility only and
5544 their use is discouraged.
5546 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5547 done differently, so that it works even without GNU ld.
5549 * New function `euidaccess' checks allowed access to a file like `access',
5550 but using the effective IDs instead of the real IDs.
5552 * The time zone data files have been updated for the latest and greatest
5553 local time conventions of the countries of the world.
5555 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5558 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5559 for formatting floating-point numbers. They are provided only for
5560 compatibility; new programs should use `sprintf' instead. There are
5561 also equivalent function for the `long double' floating-point type and
5562 all functions also exist in a reentrant form.
5564 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5565 functions for maintaining the login-record files (primarily of use to
5566 system programs such as `login'), and convenient functions for
5567 allocating and initializing a pseudo-terminal (pty) device.
5569 * Ulrich Drepper has contributed new support for System V style
5570 shared memory and IPC on systems that support it.
5572 * Ulrich Drepper has contributed several miscellaneous new functions found
5573 in System V: The `hsearch' family of functions provide an effective
5574 implementation of hash tables; `a64l' and `l64a' provide a very simple
5575 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5578 * Ulrich Drepper has contributed new reentrant counterparts for the
5579 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5581 * Ulrich Drepper has contributed new, highly-optimized versions of several
5582 string functions for the i486/Pentium family of processors.
5584 * Ulrich Drepper has updated the Linux-specific code, based largely
5585 on work done in Hongjiu Lu's version of GNU libc for Linux.
5586 The GNU library now supports Linux versions 2.0.10 and later,
5587 using the ELF object file format (i[3456]86-*-linux).
5589 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5591 * David Mosberger-Tang and Richard Henderson have ported the C library
5592 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5593 dynamic linking support for ELF/Alpha.
5595 * Richard Henderson contributed several Alpha optimized assembler function
5596 for arithmetic and string handling.
5598 * Ulrich Drepper has contributed a new set of message catalog functions to
5599 support multiple languages using the <libintl.h> interface, for use with
5600 his new package GNU gettext. Translation volunteers have contributed
5601 catalogs of the library's messages in Spanish, German, and Korean.
5603 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5604 program and the `catgets' function for reading the catalog files it
5605 creates. (The <libintl.h> interface is preferred; we include the
5606 <nl_types.h> interface using `catgets' only for source compatibility with
5607 programs already written to use it.)
5609 * New header file <values.h> gives SVID-compatible names for <limits.h>
5612 * Various new macros, declarations, and small header files for compatibility
5615 * New function `group_member' is a convenient way to check if a process has
5616 a given effective group ID.
5618 * When using GCC 2.7 and later, the socket functions are now declared in a
5619 special way so that passing an argument of type `struct sockaddr_in *',
5620 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5621 `struct sockaddr *' type, does not generate a type-clash warning.
5623 * New function `error' declared in header file <error.h> is a convenient
5624 function for printing error messages and optionally exiting; this is the
5625 canonical function used in GNU programs. The new functions `err', `warn',
5626 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5627 doing the same thing.
5629 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5630 POSIX.2 `glob' function to do ~ and {...} expansion.
5632 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5633 `clearenv' which is used in POSIX.9 is also available.
5635 * New function `getsid' returns session ID number on systems that support it.
5637 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5638 files <db.h> and <mpool.h> provide a rich set of functions for several
5639 types of simple databases stored in memory and in files, and <ndbm.h> is
5640 an old `ndbm'-compatible interface using the `db' functions. Link with
5641 `-ldb' to get these functions.
5643 * New macro `strdupa' copies a string like `strdup', but uses local stack
5644 space from `alloca' instead of dynamic heap space from `malloc'.
5646 * New function `strnlen' is like `strlen' but searches only a given maximum
5647 number of characters for the null terminator. `stpncpy', `strndup' and
5648 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5651 * New function `statfs' in header <sys/statfs.h>.
5653 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5654 provide convenient functions for operating on blocks of null-terminated
5657 * A new suite of functions in <utmp.h> handle all the details of reading
5658 and writing the utmp file.
5660 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5663 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5664 completely POSIX compliant and also implemented the extended functionality
5665 to handle alternate digit representation and alternate era date formats.
5667 * Ulrich Drepper provided an implementation of the `strptime' function
5668 defined in XPG4.2 which transforms a string into a `struct tm' value.
5670 * Paul Eggert provided the tzselect shell script as part of the timezone
5671 code. The shell script makes it easy to select the correct timezone
5674 * The implementation of the malloc family of functions is completely replaced
5675 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5676 The implementation uses the mmap function (if available) and it is
5677 optimized for the use in multi threaded programs.
5679 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5680 functions. This new functionality is usable by specifying a special
5681 salt string and it is compatible with implementation on *BSD systems.
5683 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5684 `getsubopt' to handle second level command line options, `bsd_signal'
5685 to access BSD style `signal' functionality, the obsolete `regexp' style
5688 * the `lchown' function is available on system which support this
5691 * The implementation of the shadow password handling function was contributed
5694 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5696 * POSIX.1g support was added. The <sys/select.h> header is available,
5697 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5698 implementation of `getaddrinfo'.
5702 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5704 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5705 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5707 * The new function `daemon' from 4.4 BSD is useful for server programs that
5708 want to put themselves in the background.
5710 * Joel Sherrill has contributed support for several standalone boards that
5711 run without an operating system.
5713 * `printf', `scanf' and friends now accept a `q' type modifier for long
5714 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5716 * All of the code taken from BSD (notably most of the math and networking
5717 routines) has been updated from the BSD 4.4-Lite release.
5719 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5721 * The new functions `getdomainname' and `setdomainname' fetch or change the
5722 YP/NIS domain name. These are system calls which exist on systems which
5725 * The time zone data files have been updated for the latest international
5728 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5729 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5733 * The C library now includes support for Sun RPC, from Sun's free
5734 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5735 are included. (There is still no support for YP.)
5737 * Tom Quinn has contributed a port of the C library to SGI machines running
5738 Irix 4 (mips-sgi-irix4).
5740 * The new `lockf' function is a simplified interface to the locking
5741 facilities of `fcntl', included for compatibility.
5743 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5745 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5747 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5750 * The error message printed by `assert' for a failed assertion now includes
5751 the name of the program (if using GNU ld) and the name of the calling
5752 function (with versions of GCC that support this).
5754 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5756 * The library now includes the <sys/mman.h> header file and memory
5757 management functions `mmap', `munmap', `mprotect', `msync', and
5758 `madvise', on systems that support those facilities.
5760 * The interface for `mcheck' has changed slightly: the function called to
5761 abort the program when an allocation inconsistency is detected now takes
5762 an argument that indicates the type of failure. The new function
5763 `mprobe' lets you request a consistency check for a particular block at
5764 any time (checks are normally done only when you call `free' or `realloc'
5767 * It is now possible to easily cross-compile the C library, building on one
5768 system a library to run on another machine and/or operating system. All
5769 you need to do is set the variable `HOST_CC' in `configparms' to the
5770 native compiler for programs to run on the machine you are building on (a
5771 few generator programs are used on Unix systems); set `CC' to the
5774 * The new function `fexecve' (only implemented on the GNU system) executes
5775 a program file given a file descriptor already open on the file.
5779 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5780 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5782 * You can set the variable `libprefix' in `configparms' to specify a prefix
5783 to be prepended to installed library files; this makes it easy to install
5784 the GNU C library to be linked as `-lgnuc' or whatever.
5786 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5787 copies a limited number of characters from a string, and returns the
5788 address of the last character written.
5790 * You no longer need to check for whether the installed `stddef.h' is
5791 compatible with the GNU C library. configure now checks for you.
5793 * You can now define a per-stream `fileno' function to convert the
5794 stream's cookie into an integral file descriptor.
5796 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5797 allocates zero bytes of storage, and returns a unique pointer which
5798 you can pass to `realloc' or `free'. The behavior is undefined if
5799 you dereference this pointer.
5801 * The C library now runs on Sony NEWS m68k machines running either
5802 NewsOS 3 or NewsOS 4.
5804 * The new `syscall' function is a system-dependent primitive function
5805 for invoking system calls. It has the canonical behavior on Unix
5806 systems, including unreliable return values for some calls (such as
5807 `pipe', `fork' and `getppid').
5809 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5810 to `EAGAIN', which is the preferred name. On systems whose kernels
5811 use two distinct codes, the C library now translates EWOULDBLOCK to
5812 EAGAIN in every system call function.
5816 * The GNU C Library Reference Manual is now distributed with the library.
5817 `make dvi' will produce a DVI file of the printed manual.
5818 `make info' will produce Info files that you can read on line using C-h i
5819 in Emacs or the `info' program.
5820 Please send comments on the manual to bug-glibc-manual@gnu.org.
5822 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5824 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5826 * Jason Merrill has contributed a port to the Sequent Symmetry running
5827 Dynix version 3 (i386-sequent-dynix).
5829 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5830 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5832 * New function `memory_warnings' lets you arrange to get warnings when
5833 malloc is running out of memory to allocate, like Emacs gives you.
5835 * The C library now contains the relocating allocator used in Emacs 19 for
5836 its editing buffers. This allocator (ralloc) minimizes allocation
5837 overhead and fragmentation by moving allocated regions around whenever it
5838 needs to. You always refer to a ralloc'd region with a "handle" (a
5839 pointer to a pointer--an object of type `void **').
5841 * There is a new `printf' format: `%m' gives you the string corresponding
5842 to the error code in `errno'.
5844 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5845 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5846 pass, the `a' modifier says to fill in a `char **' you pass with a
5849 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5850 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5851 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5853 * `mkstemp' is a traditional Unix function to atomically create and open a
5854 uniquely-named temporary file.
5858 * The standard location for the file that says what the local timezone is
5859 has changed again. It is now `/usr/local/etc/localtime' (or more
5860 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5862 * The distribution no longer contains any files with names longer than 14
5865 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5866 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5868 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5872 * The configuration process has changed quite a bit. The `configure'
5873 script is now used just like the configuration scripts for other GNU
5874 packages. The `sysdeps' directory hierarchy is much rearranged.
5875 The file `INSTALL' explains the new scheme in detail.
5877 * The header files no longer need to be processed into ANSI C and
5878 traditional C versions. There is just one set of files to install, and
5879 it will work with ANSI or old C compilers (including `gcc -traditional').
5881 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5882 MIPS DECStation running Ultrix 4.
5884 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5885 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5886 made itself into a shared library.
5888 * Yet further improved support for the i386, running 4.3 BSD-like systems
5889 (such as Mach 3 with the Unix single-server), or System V.
5891 * New function `strncasecmp' to do case-insensitive string comparison
5892 with limited length.
5894 * New function `strsep' is a reentrant alternative to `strtok'.
5896 * New functions `scandir' and `alphasort' for searching directories.
5898 * New function `setenv' is a better interface to `putenv'.
5900 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5901 function for traversing a directory tree.
5903 * The GNU obstack package is now also part of the C library.
5904 The new function `open_obstack_stream' creates a stdio stream that
5905 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5906 formatted output directly to an obstack.
5908 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5909 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5911 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5913 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5914 things to your strings.
5916 * There are some new test programs: test-fseek, testmb, and testrand.
5918 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5919 These ports are not finished, but are a good starting place for really
5920 supporting those systems.
5922 * `/etc/localtime' is now the standard location for the file that says what
5923 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5924 This follows the general principle that `/etc' is the place for all local
5925 configuration files.
5927 * The C library header files now use `extern "C"' when used by the C++
5928 compiler, so the C library should now work with C++ code.
5930 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5931 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5934 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5935 function which uses the `merge sort' algorithm, and is said to be
5936 significantly faster than the old GNU `qsort' function. Merge sort is
5937 now the standard `qsort' function. The new algorithm can require a lot
5938 of temporary storage; so, the old sorting function is called when the
5939 required storage is not available.
5941 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5942 provides the Unix `crypt' function, plus some other entry points.
5944 * The code and header files taken from 4.4 BSD have been updated with the
5945 latest files released from Berkeley.
5947 ----------------------------------------------------------------------
5948 Copyright information:
5950 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5952 Permission is granted to anyone to make or distribute verbatim copies
5953 of this document as received, in any medium, provided that the
5954 copyright notice and this permission notice are preserved,
5955 thus giving the recipient permission to redistribute in turn.
5957 Permission is granted to distribute modified versions
5958 of this document, or of portions of it,
5959 under the above conditions, provided also that they
5960 carry prominent notices stating who last changed them.
5963 version-control: never