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 * New locale added: ckb_IQ (Kurdish/Sorani spoken in Iraq)
14 * The GNU C Library now loads audit modules listed in the DT_AUDIT and
15 DT_DEPAUDIT dynamic section entries of the main executable.
17 Deprecated and removed features, and other changes affecting compatibility:
19 [Add deprecations, removals and changes affecting compatibility here]
21 Changes to build and runtime requirements:
23 [Add changes to build and runtime requirements here]
25 Security related changes:
27 CVE-2020-10029: Trigonometric functions on x86 targets suffered from stack
28 corruption when they were passed a pseudo-zero argument. Reported by Guido
29 Vranken / ForAllSecure Mayhem.
31 CVE-2020-1751: A defect in the PowerPC backtrace function could cause an
32 out-of-bounds write when executed in a signal frame context.
34 CVE-2020-1752: A use-after-free vulnerability in the glob function when
35 expanding ~user has been fixed.
37 The following bugs are resolved with this release:
39 [The release manager will add the list generated by
40 scripts/list-fixed-bugs.py just before the release.]
46 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
47 enable features from the draft ISO C2X standard. Only some features from
48 this draft standard are supported by the GNU C Library, and as the draft
49 is under active development, the set of features enabled by this macro is
50 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
51 by compiling with "gcc -std=gnu2x".
53 * The <math.h> functions that round their results to a narrower type now
54 have corresponding type-generic macros in <tgmath.h>, as defined in TS
55 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
56 Clarification Request 13 to TS 18661-3.
58 * The function pthread_clockjoin_np has been added, enabling join with a
59 terminated thread with a specific clock. It allows waiting against
60 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
62 * New locale added: mnw_MM (Mon language spoken in Myanmar).
64 * The DNS stub resolver will optionally send the AD (authenticated data) bit
65 in queries if the trust-ad option is set via the options directive in
66 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
67 mode, the AD bit, as provided by the name server, is available to
68 applications which call res_search and related functions. In the default
69 mode, the AD bit is not set in queries, and it is automatically cleared in
70 responses, indicating a lack of DNSSEC validation. (Therefore, the name
71 servers and the network path to them are treated as untrusted.)
73 Deprecated and removed features, and other changes affecting compatibility:
75 * The totalorder and totalordermag functions, and the corresponding
76 functions for other floating-point types, now take pointer arguments to
77 avoid signaling NaNs possibly being converted to quiet NaNs in argument
78 passing. This is in accordance with the resolution of Clarification
79 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
80 floating-point arguments directly will continue to work.
82 * The obsolete function stime is no longer available to newly linked
83 binaries, and its declaration has been removed from <time.h>.
84 Programs that set the system time should use clock_settime instead.
86 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
87 in a future version of glibc. In this release, the header still exists
88 but calling ftime will cause a compiler warning. All programs should use
89 gettimeofday or clock_gettime instead.
91 * The gettimeofday function no longer reports information about a
92 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
93 many years, as it cannot handle the full complexity of the world's
94 timezones, but hitherto we have supported it on a best-effort basis.
95 Changes required to support 64-bit time_t on 32-bit architectures have
96 made this no longer practical.
98 As of this release, callers of gettimeofday with a non-null 'tzp' argument
99 should expect to receive a 'struct timezone' whose tz_minuteswest and
100 tz_dsttime fields are zero. (For efficiency reasons, this does not always
101 happen on a few Linux-based ports. This will be corrected in a future
104 All callers should supply a null pointer for the 'tzp' argument to
105 gettimeofday. For accurate information about the time zone associated
106 with the current time, use the localtime function.
108 gettimeofday itself is obsolescent according to POSIX. We have no plans
109 to remove access to this function, but portable programs should consider
110 using clock_gettime instead.
112 * The settimeofday function can still be used to set a system-wide time
113 zone when the operating system supports it. This is because the Linux
114 kernel reused the API, on some architectures, to describe a system-wide
115 time-zone-like offset between the software clock maintained by the kernel,
116 and the "RTC" clock that keeps time when the system is shut down.
118 However, to reduce the odds of this offset being set by accident,
119 settimeofday can no longer be used to set the time and the offset
120 simultaneously. If both of its two arguments are non-null, the call
121 will fail (setting errno to EINVAL).
123 Callers attempting to set this offset should also be prepared for the call
124 to fail and set errno to ENOSYS; this already happens on the Hurd and on
125 some Linux architectures. The Linux kernel maintainers are discussing a
126 more principled replacement for the reused API. After a replacement
127 becomes available, we will change settimeofday to fail with ENOSYS on all
128 platforms when its 'tzp' argument is not a null pointer.
130 settimeofday itself is obsolescent according to POSIX. Programs that set
131 the system time should use clock_settime and/or the adjtime family of
132 functions instead. We may cease to make settimeofday available to newly
133 linked binaries after there is a replacement for Linux's time-zone-like
136 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
137 the optional CAS instruction is implemented (for instance, LEON processors
138 are still supported, but SuperSPARC processors are not).
140 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
143 * If a lazy binding failure happens during dlopen, during the execution of
144 an ELF constructor, the process is now terminated. Previously, the
145 dynamic loader would return NULL from dlopen, with the lazy binding error
146 captured in a dlerror message. In general, this is unsafe because
147 resetting the stack in an arbitrary function call is not possible.
149 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
150 executable stack unless explicitly configured at build time to require
151 minimum kernel version 4.8 or newer. This is because executing
152 floating-point branches on a non-executable stack on Linux kernels prior to
153 4.8 can lead to application crashes for some MIPS configurations. While
154 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
155 expected to enable non-executable stack by default with PT_GNU_STACK by
156 default and is thus likely to trigger a crash on older kernels.
158 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
159 non-executable stack while dropping support for older kernels.
161 * System call wrappers for time system calls now use the new time64 system
162 calls when available. On 32-bit targets, these wrappers attempt to call
163 the new system calls first and fall back to the older 32-bit time system
164 calls if they are not present. This may cause issues in environments
165 that cannot handle unsupported system calls gracefully by returning
166 -ENOSYS. Seccomp sandboxes are affected by this issue.
168 Changes to build and runtime requirements:
170 * It is no longer necessary to have recent Linux kernel headers to build
171 working (non-stub) system call wrappers on all architectures except 64-bit
172 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
174 * The ChangeLog file is no longer present in the toplevel directory of the
175 source tree. ChangeLog files are located in the ChangeLog.old directory as
176 ChangeLog.N where the highest N has the latest entries.
178 Security related changes:
180 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
181 environment variable during program execution after a security
182 transition, allowing local attackers to restrict the possible mapping
183 addresses for loaded libraries and thus bypass ASLR for a setuid
184 program. Reported by Marcin KoĆcielnicki.
186 The following bugs are resolved with this release:
188 [12031] localedata: iconv -t ascii//translit with Greek characters
189 [15813] libc: Multiple issues in __gen_tempname
190 [17726] libc: [arm, sparc] profil_counter should be compat symbol
191 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
192 [19767] libc: vdso is not used with static linking
193 [19903] hurd: Shared mappings not being inherited by children processes
194 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
195 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
197 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
198 Symbols-A/B Unicode blocks
199 [23518] libc: Eliminate __libc_utmp_jump_table
200 [24026] malloc: malloc_info() returns wrong numbers
201 [24054] localedata: Many locales are missing date_fmt
202 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
203 [24304] dynamic-link: Lazy binding failure during ELF
204 constructors/destructors is not fatal
205 [24376] libc: RISC-V symbol size confusion with _start
206 [24682] localedata: zh_CN first weekday should be Monday per GB/T
208 [24824] libc: test-in-container does not install charmap files compatible
210 [24844] regex: regex bad pointer / leakage if malloc fails
211 [24867] malloc: Unintended malloc_info formatting changes
212 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
213 [24880] libc: login: utmp implementation uses struct flock with fcntl64
214 [24882] libc: login: pututline uses potentially outdated cache
215 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
216 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
218 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
220 [24930] dynamic-link: dlopen of PIE executable can result in
221 _dl_allocate_tls_init assertion failure
222 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
223 (stringop-overflow error)
224 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
225 functions other can lead to crashes
226 [24967] libc: jemalloc static linking causes runtime failure
227 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
229 [25035] libc: sbrk() failure handled poorly in tunables_strdup
230 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
231 [25097] libc: new -Warray-bounds with GCC 10
232 [25112] dynamic-link: dlopen must not make new objects accessible when it
233 still can fail with an error
234 [25139] localedata: Please add the new mnw_MM locale
235 [25149] regex: Array bounds violation in proceed_next_node
236 [25157] dynamic-link: Audit cookie for the dynamic loader is not
237 initialized correctly
238 [25189] libc: glibc's __glibc_has_include causes issues with clang
240 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
242 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
243 binaries (CVE-2019-19126)
244 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
246 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
248 [25232] string: <string.h> does not enable const correctness for strchr et
250 [25233] localedata: Consider "." as the thousands separator for sl_SI
252 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
253 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
254 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
256 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
257 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
259 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
260 (dl_initfirst) link map pointer
261 [25401] malloc: pvalloc must not have __attribute_alloc_size__
262 [25423] libc: Array overflow in backtrace on powerpc
263 [25425] network: Missing call to __resolv_context_put in
264 getaddrinfo.c:gethosts
271 * Unicode 12.1.0 Support: Character encoding, character type info, and
272 transliteration tables are all updated to Unicode 12.1.0, using
273 generator scripts contributed by Mike FABIAN (Red Hat).
275 * The dynamic linker accepts the --preload argument to preload shared
276 objects, in addition to the LD_PRELOAD environment variable.
278 * The twalk_r function has been added. It is similar to the existing
279 twalk function, but it passes an additional caller-supplied argument
280 to the callback function.
282 * On Linux, the getdents64, gettid, and tgkill functions have been added.
284 * Minguo (Republic of China) calendar support has been added as an
285 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
288 * The entry for the new Japanese era has been added for ja_JP locale.
290 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
291 pvalloc, memalign, and posix_memalign fail now with total object size
292 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
293 pointer subtraction within the allocated object, where results might
294 overflow the ptrdiff_t type.
296 * The dynamic linker no longer refuses to load objects which reference
297 versioned symbols whose implementation has moved to a different soname
298 since the object has been linked. The old error message, symbol
299 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
300 link time reference, is gone.
302 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
303 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
304 functions. These behave similarly to their "timed" equivalents, but also
305 accept a clockid_t parameter to determine which clock their timeout should
306 be measured against. All functions allow waiting against CLOCK_MONOTONIC
307 and CLOCK_REALTIME. The decision of which clock to be used is made at the
308 time of the wait (unlike with pthread_condattr_setclock, which requires
309 the clock choice at initialization time).
311 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
312 work, new resolvers can use a second argument which can be extended in
313 the future, currently it contains the AT_HWCAP2 value.
315 Deprecated and removed features, and other changes affecting compatibility:
317 * The copy_file_range function fails with ENOSYS if the kernel does not
318 support the system call of the same name. Previously, user space
319 emulation was performed, but its behavior did not match the kernel
320 behavior, which was deemed too confusing. Applications which use the
321 copy_file_range function can no longer rely on glibc to provide a fallback
322 on kernels that do not support the copy_file_range system call, and if
323 this function returns ENOSYS, they will need to use their own fallback.
324 Support for copy_file_range for most architectures was added in version
325 4.5 of the mainline Linux kernel.
327 * The functions clock_gettime, clock_getres, clock_settime,
328 clock_getcpuclockid, clock_nanosleep were removed from the librt library
329 for new applications (on architectures which had them). Instead, the
330 definitions in libc will be used automatically, which have been available
333 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
334 and <sys/stropts.h> have been removed.
336 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
337 resolver flag (deprecated in glibc 2.25) have been removed.
339 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
340 resolver have been removed from <resolv.h>.
342 * With --enable-bind-now, installed programs are now linked with the
345 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
346 configurations) has been removed, following the deprecation of this
347 subarchitecture in version 8 of GCC, and its removal in version 9.
349 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
350 header have been removed.
352 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
353 deprecated and will be removed from a future version of glibc.
354 Application should directly access /proc instead. For obtaining random
355 bits, the getentropy function can be used.
357 Changes to build and runtime requirements:
359 * GCC 6.2 or later is required to build the GNU C Library.
361 Older GCC versions and non-GNU compilers are still supported when
362 compiling programs that use the GNU C Library.
364 Security related changes:
366 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
367 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
368 has undefined behavior. On x32, the size_t argument may be passed
369 in the lower 32 bits of the 64-bit RDX register with non-zero upper
370 32 bits. When it happened with the sign bit of RDX register set,
371 memcmp gave the wrong result since it treated the size argument as
372 zero. Reported by H.J. Lu.
374 CVE-2019-9169: Attempted case-insensitive regular-expression match
375 via proceed_next_node in posix/regexec.c leads to heap-based buffer
376 over-read. Reported by Hongxu Chen.
378 The following bugs are resolved with this release:
380 [2872] locale: Transliteration Cyrillic -> ASCII fails
381 [6399] libc: gettid() should have a wrapper
382 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
383 [16976] glob: fnmatch unbounded stack VLA for collating symbols
384 [17396] localedata: globbing for locale by [[.collating-element.]]
385 [18035] dynamic-link: pldd does no longer work, enters infinite loop
386 [18465] malloc: memusagestat is built using system C library
387 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
388 invalid input drops valid char
389 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
390 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
391 [21897] localedata: Afar locales: Fix mon, abmon, and abday
392 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
393 [23352] malloc: __malloc_check_init still defined in public header
395 [23403] nptl: Wrong alignment of TLS variables
396 [23501] libc: nftw() doesn't return dangling symlink's inode
397 [23733] malloc: Check the count before calling tcache_get()
398 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
400 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
401 [23844] nptl: pthread_rwlock_trywrlock results in hang
402 [23983] argparse: Missing compat versions of argp_failure and argp_error
403 for long double = double
404 [23984] libc: Missing compat versions of err.h and error.h functions for
406 [23996] localedata: Dutch salutations
407 [24040] libc: riscv64: unterminated call chain in __thread_start
408 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
410 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
411 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
413 [24114] regex: regexec buffer read overrun in "grep -i
414 '\(\(\)*.\)*\(\)\(\)\1'"
415 [24122] libc: Segfaults if 0 returned from la_version
416 [24153] stdio: Some input functions do not react to stdin assignment
417 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
418 RDX is set) (CVE-2019-7309)
419 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
420 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
421 not the default "nor"
422 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
423 false positives, change to modern flexible array
424 [24180] nptl: pthread_mutex_trylock does not use the correct order of
425 instructions while maintaining the robust mutex list due to missing
427 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
428 unnecessary librt dependencies
429 [24200] localedata: Revert first_weekday removal in en_IE locale
430 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
431 [24215] nptl: pthread_timedjoin_np should be a cancellation point
432 [24216] malloc: Check for large bin list corruption when inserting
434 [24228] stdio: old x86 applications that use legacy libio crash on exit
435 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
437 [24293] localedata: Missing Minguo calendar support for TW locales
438 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
440 [24307] localedata: Update locale data to Unicode 12.0.0
441 [24323] dynamic-link: dlopen should not be able open PIE objects
442 [24335] build: "Obsolete types detected" with Linux 5.0 headers
443 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
445 [24370] localedata: Add lang_name for tt_RU locale
446 [24372] locale: Binary locale files are not architecture independent
447 [24394] time: strptime %Ey mis-parses final year of era
448 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
450 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
452 [24531] malloc: Malloc tunables give tcache assertion failures
453 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
455 [24535] localedata: Update locale data to Unicode 12.1.0
456 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
457 kernels and break testing
458 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
459 [24556] build: [GCC 9] error: â%sâ directive argument is null
460 [-Werror=format-overflow=]
461 [24570] libc: alpha: compat msgctl uses __IPC_64
462 [24584] locale: Data race in __wcsmbs_clone_conv
463 [24588] stdio: Remove codecvt vtables from libio
464 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
466 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
467 [24632] stdio: Old binaries which use freopen with default stdio handles
469 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
471 [24652] localedata: szl_PL spelling correction
472 [24695] nss: nss_db: calling getpwent after endpwent crashes
473 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
474 in /etc/nsswitch.conf
475 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
476 [24740] libc: getdents64 type confusion
477 [24741] dynamic-link: ld.so should not require that a versioned symbol is
478 always implemented in the same library
479 [24744] libc: Remove copy_file_range emulation
480 [24757] malloc: memusagestat is linked against system libpthread
481 [24794] libc: Partial test suite run builds corrupt test-in-container
489 * The getcpu wrapper function has been added, which returns the currently
490 used CPU and NUMA node. This function is Linux-specific.
492 * A new convenience target has been added for distribution maintainers
493 to build and install all locales as directories with files. The new
494 target is run by issuing the following command in your build tree:
495 'make localedata/install-locale-files', with an optional DESTDIR
496 to set the install root if you wish to install into a non-default
499 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
501 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
502 for _GNU_SOURCE, to match BSD environments.
504 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
505 indicates that it will abort the transaction prior to entering the kernel
506 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
507 suspended, and this caused some undefined side-effects issues by aborting
508 transactions manually. Glibc avoided it by abort transactions manually on
509 each syscall, but it lead to performance issues on newer kernels where the
510 HTM state is saved and restore lazily (the state being saved even when the
511 process actually does not use HTM).
513 * The functions posix_spawn_file_actions_addchdir_np and
514 posix_spawn_file_actions_addfchdir_np have been added, enabling
515 posix_spawn and posix_spawnp to run the new process in a different
516 directory. These functions are GNU extensions. The function
517 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
520 * The popen and system do not run atfork handlers anymore (BZ#17490).
521 Although it is a possible POSIX violation, the POSIX rationale in
522 pthread_atfork documentation regarding atfork handlers is to handle
523 inconsistent mutex state after a fork call in a multi-threaded process.
524 In both popen and system there is no direct access to user-defined mutexes.
526 * Support for the C-SKY ABIV2 running on Linux has been added. This port
527 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
529 - C-SKY ABIV2 soft-float little-endian
530 - C-SKY ABIV2 hard-float little-endian
532 * strftime's default formatting of a locale's alternative year (%Ey)
533 has been changed to zero-pad the year to a minimum of two digits,
534 like "%y". This improves the display of Japanese era years during
535 the first nine years of a new era, and is expected to be harmless
536 for all other locales (only Japanese locales regularly have
537 alternative year numbers less than 10). Zero-padding can be
538 overridden with the '_' or '-' flags (which are GNU extensions).
540 * As a GNU extension, the '_' and '-' flags can now be applied to
541 "%EY" to control how the year number is formatted; they have the
542 same effect that they would on "%Ey".
544 Deprecated and removed features, and other changes affecting compatibility:
546 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
547 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
549 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
550 in <sys/procfs.h>, has been corrected to match the type actually used by
551 the Linux kernel. This affects the size and layout of that structure on
552 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
554 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
555 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
556 defined in <sys/procfs.h>, has been corrected to match the type actually
557 used by the Linux kernel. This affects the size and layout of those
560 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
561 meant to scan a string and allocate space for it with malloc, is now
562 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
563 defined. This extension conflicts with C99's use of '%a' to scan a
564 hexadecimal floating-point number, which is now available to programs
565 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
567 POSIX.1-2008 includes the feature of allocating a buffer for string input
568 with malloc, using the modifier letter 'm' instead. Programs using
569 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
570 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
571 C99 '%a' no longer need to avoid _GNU_SOURCE.
573 GCC's -Wformat warnings can detect most uses of this extension, as long
574 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
575 __attribute__ ((format (scanf, ...))).
577 Changes to build and runtime requirements:
579 * Python 3.4 or later is required to build the GNU C Library.
581 * On most architectures, GCC 5 or later is required to build the GNU C
582 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
584 Older GCC versions and non-GNU compilers are still supported when
585 compiling programs that use the GNU C Library.
587 Security related changes:
589 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
590 denial of service due to resource exhaustion when processing getaddrinfo
591 calls with crafted host names. Reported by Guido Vranken.
593 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
594 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
595 happened, accessing the 32-bit size_t value as the full 64-bit register
596 in the assembly string/memory functions would cause a buffer overflow.
599 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
600 addresses with arbitrary trailing characters, potentially leading to data
601 or command injection issues in applications.
603 The following bugs are resolved with this release:
605 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
606 [10496] localedata: 12h time representation in multiple locales faulty
607 [10797] localedata: it_IT locale numeric does not have a separator for
609 [11319] libc: dprintf doesn't handle errors properly
610 [16346] time: mktime: potentially unsafe use of localtime_offset
611 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
613 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
614 posix_spawn_file_actions_addfchdir_np
615 [17426] localedata: Indian locales: set the correct date format
616 [17490] stdio: popen should not invoke atfork handlers
617 [17783] libc: TIOCSER_TEMT conditions inconsistent
618 [18040] regex: use-after-free in regexec/get_subexp
619 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
620 [20018] network: getaddrinfo should reject IP addresses with trailing
621 characters (CVE-2016-10739)
622 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
623 [20271] libc: Missing "\n" in __libc_fatal calls
624 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
625 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
626 pointer argument is non-NULL
627 [21037] stdio: open_memstream and freopen
628 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
629 [21716] time: Crash in glibc's mktime in low-memory situations
630 [22834] stdio: Subprocess forked by popen may crash in Linux when
631 multithreads call popen
632 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
633 and pthread_create fails.
634 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
635 [23125] libc: riscv64: endless loop when throwing an exception from a
637 [23275] nptl: Race in pthread_mutex_lock while promoting to
638 PTHREAD_MUTEX_ELISION_NP.
639 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
641 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
643 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
645 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
646 [23509] dynamic-link: CET enabled glibc is incompatible with the older
648 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
649 [23521] nss: get_next_alias nss_files file stream leak
650 [23538] nptl: Hang in pthread_cond_broadcast
651 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
652 [23578] regex: Invalid memory access if regex pattern contains NUL byte
653 [23579] libc: Errors misreported in preadv2
654 [23597] build: support/test-container.c doesn't work with different
656 [23603] time: mktime signed integer overflow on large timestamps
657 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
658 [23614] libc: powerpc: missing CFI register information in __mpn_*
660 [23637] string: Generic strstr/strcasestr fails with huge needles
661 [23640] libc: no way to easily clear FD_CLOEXEC in
662 posix_spawn_file_actions_adddup2()
663 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
665 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
667 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
668 [23689] libc: Bug in documentation for rusage.ru_ixrss in
669 bits/types/struct_rusage.h
670 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
672 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
674 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
675 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
676 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
678 [23724] localedata: Albanian date formats are incorrect
679 [23735] math: libnldbl_nonshared.a references internal libm symbols
680 [23740] localedata: kl_GL: Month names and date formats need update
681 [23744] regex: regex refactorings to remove BE, avoid duplication
682 [23745] time: mktime fix for Gnulib + coreutils
683 [23758] time: Improve the width of alternate representation for year in
685 [23783] libc: [mips] Missing CMSPAR bits/termios.h
686 [23789] time: mktime does not set errno on failure
687 [23791] localedata: Wrong monetary format for ca_ES locale
688 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
689 [23794] locale: c16rtomb does not handle surrogate pairs
690 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
691 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
692 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
693 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
694 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
695 [23862] libc: [sh] missing kernel-features.h undefines
696 [23864] libc: [riscv] missing kernel-features.h undefines
697 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
698 [23907] malloc: Incorrect double-free malloc tcache check disregards
700 [23913] libc: off-by-one in function maybe_script_execute in
701 sysdeps/posix/spawni.c
702 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
703 [23923] locale: Add --no-hard-links option to localedef
704 [23927] network: Linux if_nametoindex() does not close descriptor
706 [23961] math: powf can overflow to inf without setting errno in non-
707 nearest rounding mode
708 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
709 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
710 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
711 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
712 [24011] localedata: Fixed small type in comment for locale bs_BA
713 [24018] libc: gettext() may return NULL
714 [24022] build: riscv build failure with Linux kernel 4.20-rc7
715 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
716 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
718 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
719 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
721 [24046] localedata: en_US locale doesn't define date_fmt
722 [24063] manual: @var{errno} should be @code{errno}
723 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
724 [24088] libc: VSCR field is not being correctly read in ucontext_t on
726 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
728 [24097] string: Can't use 64-bit register for size_t in assembly codes for
730 [24110] hurd: SS_DISABLE never set in stack_t value returned by
732 [24112] network: Do not send DNS queries for non-host names (where all
733 answers will be rejected)
734 [24130] libc: alpha __remqu corrupts $f3 register
741 * The localization data for ISO 14651 is updated to match the 2016
742 Edition 4 release of the standard, this matches data provided by
743 Unicode 9.0.0. This update introduces significant improvements to the
744 collation of Unicode characters. This release deviates slightly from
745 the standard in that the collation element ordering for lowercase and
746 uppercase LATIN script characters is adjusted to ensure that regular
747 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
748 is not matched by [a-z]. With the update many locales have been
749 updated to take advantage of the new collation information. The new
750 collation information has increased the size of the compiled locale
751 archive or binary locales.
753 * The GNU C Library can now be compiled with support for Intel CET, AKA
754 Intel Control-flow Enforcement Technology. When the library is built
755 with --enable-cet, the resulting glibc is protected with indirect
756 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
757 compatible with all existing executables and shared libraries. This
758 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
759 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
760 capable of multi-byte NOPs, like x86-64 processors as well as Intel
761 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
762 x86_64 and x32 on non-CET processors. --enable-cet has been tested
763 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
766 * The GNU C Library now has correct support for ABSOLUTE symbols
767 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
768 relocated incorrectly or in some cases discarded. The GNU linker can
769 make use of the newer semantics, but it must communicate it to the
770 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
771 field) to indicate such support is required.
773 * Unicode 11.0.0 Support: Character encoding, character type info, and
774 transliteration tables are all updated to Unicode 11.0.0, using
775 generator scripts contributed by Mike FABIAN (Red Hat).
777 * <math.h> functions that round their results to a narrower type are added
778 from TS 18661-1:2014 and TS 18661-3:2015:
780 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
783 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
786 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
789 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
792 * Two grammatical forms of month names are now supported for the following
793 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
794 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
795 support two grammatical forms in abbreviated month names: Catalan, Greek,
798 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
799 include the support for two grammatical forms of month names.
801 * Building and running on GNU/Hurd systems now works without out-of-tree
804 * The renameat2 function has been added, a variant of the renameat function
805 which has a flags argument. If the flags are zero, the renameat2 function
806 acts like renameat. If the flag is not zero and there is no kernel
807 support for renameat2, the function will fail with an errno value of
808 EINVAL. This is different from the existing gnulib function renameatu,
809 which performs a plain rename operation in case of a RENAME_NOREPLACE
810 flags and a non-existing destination (and therefore has a race condition
811 that can clobber the destination inadvertently).
813 * The statx function has been added, a variant of the fstatat64
814 function with an additional flags argument. If there is no direct
815 kernel support for statx, glibc provides basic stat support based on
816 the fstatat64 function.
818 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
819 library if installed. libidn2 version 2.0.5 or later is recommended. If
820 libidn2 is not available, internationalized domain names are not encoded
821 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
822 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
823 with an encoding error.) Flags which used to change the IDN encoding and
824 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
825 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
826 deprecated. They no longer have any effect.
828 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
829 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
830 range of ELF gABI expressions including such constructs as
831 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
832 have been further restricted, and where in the past a dynamic string
833 token sequence may have been interpreted as a literal string it will
834 now cause a load failure. These load failures were always considered
835 unspecified behaviour from the perspective of the dynamic loader, and
836 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
837 results in a load failure now.
839 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
840 implementation includes all the standard functions provided by
843 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
844 thrd_detach, thrd_exit, and thrd_join for thread management.
846 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
847 mtx_destroy for mutual exclusion.
849 - call_once for function call synchronization.
851 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
852 cnd_wait for conditional variables.
854 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
856 Application developers must link against libpthread to use ISO C threads.
858 Deprecated and removed features, and other changes affecting compatibility:
860 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
861 installed. Software that was using either header should be updated to
862 use standard <stdio.h> interfaces instead.
864 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
865 This was never required by the C standard, and the macros just expanded
866 to call alternative names for the same functions. If you hoped getc and
867 putc would provide performance improvements over fgetc and fputc, instead
868 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
869 necessary, flockfile and funlockfile.
871 * All stdio functions now treat end-of-file as a sticky condition. If you
872 read from a file until EOF, and then the file is enlarged by another
873 process, you must call clearerr or another function with the same effect
874 (e.g. fseek, rewind) before you can read the additional data. This
875 corrects a longstanding C99 conformance bug. It is most likely to affect
876 programs that use stdio to read interactive input from a terminal.
879 * The macros 'major', 'minor', and 'makedev' are now only available from
880 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
881 headers that happen to include <sys/types.h>. These macros are rarely
882 used, not part of POSIX nor XSI, and their names frequently collide with
883 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
886 <sys/sysmacros.h> is a GNU extension. Portable programs that require
887 these macros should first include <sys/types.h>, and then include
888 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
890 * The tilegx*-*-linux-gnu configurations are no longer supported.
892 * The obsolete function ustat is no longer available to newly linked
893 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
894 function has been deprecated in favor of fstatfs and statfs.
896 * The obsolete function nfsservctl is no longer available to newly linked
897 binaries. This function was specific to systems using the Linux kernel
898 and could not usefully be used with the GNU C Library on systems with
899 version 3.1 or later of the Linux kernel.
901 * The obsolete function name llseek is no longer available to newly linked
902 binaries. This function was specific to systems using the Linux kernel
903 and was not declared in a header. Programs should use the lseek64 name
904 for this function instead.
906 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
907 getaddrinfo and getnameinfo functions have been deprecated. The behavior
908 previously selected by them is now always enabled.
910 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
911 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
912 restriction (rejecting '_' in host names, among other things) has been
913 removed, for increased compatibility with non-IDN name resolution.
915 * The fcntl function now have a Long File Support variant named fcntl64. It
916 is added to fix some Linux Open File Description (OFD) locks usage on non
917 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
918 fcntl and LFS support is handled transparently. Also for Linux, the OFD
919 locks act as a cancellation entrypoint.
921 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
922 ecb_crypt, and des_setparity are no longer available to newly linked
923 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
924 longer installed. These functions encrypted and decrypted data with the
925 DES block cipher, which is no longer considered secure. Software that
926 still uses these functions should switch to a modern cryptography library,
929 * Reflecting the removal of the encrypt and setkey functions above, the
930 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
931 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
934 * The obsolete function fcrypt is no longer available to newly linked
935 binaries. It was just another name for the standard function crypt,
936 and it has not appeared in any header file in many years.
938 * We have tentative plans to hand off maintenance of the passphrase-hashing
939 library, libcrypt, to a separate development project that will, we hope,
940 keep up better with new passphrase-hashing algorithms. We will continue
941 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
942 'crypt_r' should not need to change at all; however, distributions will
943 need to install <crypt.h> and libcrypt from a separate project.
945 In this release, if the configure option --disable-crypt is used, glibc
946 will not install <crypt.h> or libcrypt, making room for the separate
947 project's versions of these files. The plan is to make this the default
948 behavior in a future release.
950 Changes to build and runtime requirements:
952 GNU make 4.0 or later is now required to build glibc.
954 Security related changes:
956 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
957 been fixed by removing the glibc-internal IDNA implementation and using
958 the system-provided libidn2 library instead. Originally reported by Hanno
959 Böck and Christian Weisgerber.
961 CVE-2017-18269: An SSE2-based memmove implementation for the i386
962 architecture could corrupt memory. Reported by Max Horn.
964 CVE-2018-11236: Very long pathname arguments to realpath function could
965 result in an integer overflow and buffer overflow. Reported by Alexey
968 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
969 architecture could write beyond the target buffer, resulting in a buffer
970 overflow. Reported by Andreas Schwab.
972 The following bugs are resolved with this release:
974 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
975 [6889] manual: 'PWD' mentioned but not specified
976 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
977 when __WORDSIZE != 64
978 [13762] regex: re_search etc. should return -2 on memory exhaustion
979 [13888] build: /tmp usage during testing
980 [13932] math: dbl-64 pow unexpectedly slow for some inputs
981 [14092] nptl: Support C11 threads
982 [14095] localedata: Review / update collation data from Unicode / ISO
984 [14508] libc: -Wformat warnings
985 [14553] libc: Namespace pollution loff_t in sys/types.h
986 [14890] libc: Make NT_PRFPREG canonical.
987 [15105] libc: Extra PLT references with -Os
988 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
990 [16335] manual: Feature test macro documentation incomplete and out of
992 [16552] libc: Unify umount implementations in terms of umount2
993 [17082] libc: htons et al.: statement-expressions prevent use on global
994 scope with -O1 and higher
995 [17343] libc: Signed integer overflow in /stdlib/random_r.c
996 [17438] localedata: pt_BR: wrong d_fmt delimiter
997 [17662] libc: please implement binding for the new renameat2 syscall
998 [17721] libc: __restrict defined as /* Ignore */ even in c11
999 [17979] libc: inconsistency between uchar.h and stdint.h
1000 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
1001 [18023] libc: extend_alloca is broken (questionable pointer comparison,
1002 horrible machine code)
1003 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
1005 [18471] libc: llseek should be a compat symbol
1006 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
1008 [18991] nss: nss_files skips large entry in database
1009 [19239] libc: Including stdlib.h ends up with macros major and minor being
1011 [19463] libc: linknamespace failures when compiled with -Os
1012 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
1013 [19527] locale: Normalized charset name not recognized by setlocale
1014 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
1015 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
1017 [19728] network: out of bounds stack read in libidn function
1018 idna_to_ascii_4i (CVE-2016-6261)
1019 [19729] network: out of bounds heap read on invalid utf-8 inputs in
1020 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
1021 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
1023 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
1024 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
1025 [20419] dynamic-link: files with large allocated notes crash in
1027 [20530] libc: bswap_16 should use __builtin_bswap16() when available
1028 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
1029 [20980] manual: CFLAGS environment variable replaces vital options
1030 [21163] regex: Assertion failure in pop_fail_stack when executing a
1031 malformed regexp (CVE-2015-8985)
1032 [21234] manual: use of CFLAGS makes glibc detect no optimization
1033 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1034 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1035 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1036 [21508] locale: intl/tst-gettext failure with latest msgfmt
1037 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1038 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1039 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1041 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1043 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1044 [22247] network: Integer overflow in the decode_digit function in
1045 puny_decode.c in libidn (CVE-2017-14062)
1046 [22342] nscd: NSCD not properly caching netgroup
1047 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1048 [22550] localedata: es_ES locale (and other es_* locales): collation
1049 should treat ñ as a primary different character, sync the collation
1050 for Spanish with CLDR
1051 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1052 by gcc configured with --enable-default-pie
1053 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1054 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1055 crossing 2GB threshold (CVE-2017-18269)
1056 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1058 [22735] time: Misleading typo in time.h source comment regarding
1060 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1061 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1062 `__assert_perror_fail ()' to `__assert_fail_base ()'
1063 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1065 [22786] libc: Stack buffer overflow in realpath() if input size is close
1066 to SSIZE_MAX (CVE-2018-11236)
1067 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1068 through an absolute DT_NEEDED path
1069 [22792] build: tcb-offsets.h dependency dropped
1070 [22797] libc: pkey_get() uses non-reserved name of argument
1071 [22807] libc: PTRACE_* constants missing for powerpc
1072 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1073 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1074 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1075 [22848] localedata: ca_ES: update date definitions from CLDR
1076 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1077 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1078 [22896] localedata: Update locale data for an_ES
1079 [22902] math: float128 test failures with GCC 8
1080 [22918] libc: multiple common of `__nss_shadow_database'
1081 [22919] libc: sparc32: backtrace yields infinite backtrace with
1083 [22926] libc: FTBFS on powerpcspe
1084 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1086 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1087 [22947] libc: FAIL: misc/tst-preadvwritev2
1088 [22963] localedata: cs_CZ: Add alternative month names
1089 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1090 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1091 [22998] dynamic-link: execstack tests are disabled when SELinux is
1093 [23005] network: Crash in __res_context_send after memory allocation
1095 [23007] math: strtod cannot handle -nan
1096 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1097 [23036] regex: regex equivalence class regression
1098 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1099 [23069] libc: sigaction broken on riscv64-linux-gnu
1100 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1101 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1102 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1103 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1104 and libc build with -Os)
1105 [23140] localedata: More languages need two forms of month names
1106 [23145] libc: _init/_fini aren't marked as hidden
1107 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1108 [23171] math: C++ iseqsig for long double converts arguments to double
1109 [23178] nscd: sudo will fail when it is run in concurrent with commands
1110 that changes /etc/passwd
1111 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1113 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1114 [23208] localedata: New locale - Lower Sorbian (dsb)
1115 [23233] regex: Memory leak in build_charclass_op function in file
1117 [23236] stdio: Harden function pointers in _IO_str_fields
1118 [23250] nptl: Offset of __private_ss differs from GCC
1119 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1120 -mtune=generic -mfpmath=sse
1121 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1123 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1124 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1126 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1127 [23277] math: nan function should not have const attribute
1128 [23279] math: scanf and strtod wrong for some hex floating-point
1129 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1131 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1132 [23303] build: undefined reference to symbol
1133 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1134 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1136 [23313] stdio: libio vtables validation and standard file object
1138 [23329] libc: The __libc_freeres infrastructure is not properly run across
1140 [23349] libc: Various glibc headers no longer compatible with
1142 [23351] malloc: Remove unused code related to heap dumps and malloc
1144 [23363] stdio: stdio-common/tst-printf.c has non-free license
1145 [23396] regex: Regex equivalence regression in single-byte locales
1146 [23422] localedata: oc_FR: More updates of locale data
1147 [23442] build: New warning with GCC 8
1148 [23448] libc: Out of bounds access in IBM-1390 converter
1149 [23456] libc: Wrong index_cpu_LZCNT
1150 [23458] build: tst-get-cpu-features-static isn't added to tests
1151 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1153 [23467] dynamic-link: x86/CET: A property note parser bug
1160 * The GNU C Library can now be compiled with support for building static
1161 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1162 executables are like static executables but can be loaded at any address
1163 and provide additional security hardening benefits at the cost of some
1164 memory and performance. When the library is built with --enable-static-pie
1165 the resulting libc.a is usable with GCC 8 and above to create static PIE
1166 executables using the GCC option '-static-pie'. This feature is currently
1167 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1168 aarch64 with binutils 2.30 or later.
1170 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1171 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1174 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1176 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1178 * In order to support faster and safer process termination the malloc API
1179 family of functions will no longer print a failure address and stack
1180 backtrace after detecting heap corruption. The goal is to minimize the
1181 amount of work done after corruption is detected and to avoid potential
1182 security issues in continued process execution. Reducing shutdown time
1183 leads to lower overall process restart latency, so there is benefit both
1184 from a security and performance perspective.
1186 * The abort function terminates the process immediately, without flushing
1187 stdio streams. Previous glibc versions used to flush streams, resulting
1188 in deadlocks and further data corruption. This change also affects
1189 process aborts as the result of assertion failures.
1191 * On platforms where long double has the IEEE binary128 format (aarch64,
1192 alpha, mips64, riscv, s390 and sparc), the math library now implements
1193 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1194 These are the same interfaces added in version 2.26 for some platforms where
1195 this format is supported but is not the format of long double.
1197 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1198 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1199 implements interfaces for that type, as defined by ISO/IEC TS
1200 18661-3:2015. These are corresponding interfaces to those supported for
1203 * The math library now implements interfaces for the _Float32, _Float64 and
1204 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1205 corresponding interfaces to those supported for _Float128.
1207 * glibc now implements the memfd_create and mlock2 functions on Linux.
1209 * Support for memory protection keys was added. The <sys/mman.h> header now
1210 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1213 * The copy_file_range function was added.
1215 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1217 * The ldconfig utility now processes `include' directives using the C/POSIX
1218 collation ordering. Previous glibc versions used locale-specific
1219 ordering, the change might break systems that relied on that.
1221 * Support for two grammatical forms of month names has been added.
1222 In a call to strftime, the "%B" and "%b" format specifiers will now
1223 produce the grammatical form required when the month is used as part
1224 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1225 required when the month is named by itself. For instance, in Greek
1226 and in many Slavic and Baltic languages, "%B" will produce the month
1227 in genitive case, and "%OB" will produce the month in nominative case.
1229 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1230 are all valid and will all accept any known form of month
1231 name---standalone or complete, abbreviated or full. In a call to
1232 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1233 the strings used by "%B" and "%b", respectively. New query
1234 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1235 used by "%OB" and "%Ob", respectively.
1237 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1238 define the strings for %OB and %Ob, respectively; these have the
1239 same syntax as "mon" and "abmon". These arrays are optional; if they
1240 are not provided then they have the same content as "mon" and "abmon",
1243 These features are provided for locales which define "alt_mon" and/or
1244 "ab_alt_mon" in their locale source data. This release includes such
1245 alternative month name data for the following languages: Belarusian,
1246 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1248 This feature is currently a GNU extension, but it is expected to
1249 be added to the next revision of POSIX, and it is also already
1250 available on some BSD-derived operating systems.
1252 This feature will cause existing statically compiled applications
1253 to fail to load locales and fall back to the builtin C/POSIX locales.
1254 See notes below for other changes affecting compatibility.
1256 * Support for the RISC-V ISA running on Linux has been added. This port
1257 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1258 for the following ISA and ABI pairs:
1264 Deprecated and removed features, and other changes affecting compatibility:
1266 * Statically compiled applications attempting to load locales compiled for the
1267 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1268 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1269 support for two grammatical forms of the month names, also extends the locale
1270 data binary format. Static applications needing locale support must be
1271 recompiled to match the runtime and data they are deployed with. In some
1272 distributions there is an upgrade window where dynamically linked applications
1273 may use a new library but the old locale data and also fall back to the
1274 builtin C/POSIX locales; restarting the application process is sufficient to
1277 * Support for statically linked applications which call dlopen is deprecated
1278 and will be removed in a future version of glibc. Applications which call
1279 dlopen need to be linked dynamically instead.
1281 * Support for old programs which use internal stdio data structures and
1282 functions is deprecated. This includes programs which use the C++ streams
1283 provided by libstdc++ in GCC 2.95. Programs which use the internal
1284 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1285 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1286 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1287 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1288 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1289 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1290 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1291 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1292 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1293 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1294 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1295 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1296 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1297 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1298 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1299 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1300 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1301 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1302 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1303 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1304 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1305 future version of glibc. Unlike other symbol removals, these old
1306 applications will not be supported using compatibility symbols.
1308 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1309 defined by <sys/ptrace.h>.
1311 * libm no longer supports SVID error handling (calling a user-provided
1312 matherr function on error) or the _LIB_VERSION variable to control error
1313 handling. (SVID error handling and the _LIB_VERSION variable still work
1314 for binaries linked against older versions of the GNU C Library.) The
1315 libieee.a library is no longer provided. math.h no longer defines struct
1316 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1317 TLOSS, PLOSS and HUGE.
1319 * The libm functions pow10, pow10f and pow10l are no longer supported for
1320 new programs. Programs should use the standard names exp10, exp10f and
1321 exp10l for these functions instead.
1323 * The mcontext_t type is no longer the same as struct sigcontext. On
1324 platforms where it was previously the same, this changes the C++ name
1325 mangling for interfaces involving this type.
1327 * The add-ons mechanism for building additional packages at the same time as
1328 glibc has been removed. The --enable-add-ons configure option is now
1331 * The --without-fp configure option is now ignored. Whether hardware
1332 floating-point instructions are used is now configured based on whether
1333 the compiler used at configure time (without any options implied by a
1334 --with-cpu= configure option) uses such instructions.
1336 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1337 the specified string can be parsed as a domain name.
1339 * In the malloc_info output, the <heap> element may contain another <aspace>
1340 element, "subheaps", which contains the number of sub-heaps.
1342 * The libresolv function p_secstodate is no longer supported for new
1345 * The tilepro-*-linux-gnu configuration is no longer supported.
1347 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1348 and will be removed in a future release. Software that is still using
1349 either header should be updated to use standard <stdio.h> interfaces
1352 libio.h was originally the header for a set of supported GNU extensions,
1353 but they have not been maintained as such in many years, they are now
1354 standing in the way of improvements to stdio, and we don't think there are
1355 any remaining external users. _G_config.h was never intended for public
1356 use, but predates the bits convention.
1358 Changes to build and runtime requirements:
1360 * bison version 2.7 or later is required to generate code in the 'intl'
1363 Security related changes:
1365 CVE-2009-5064: The ldd script would sometimes run the program under
1366 examination directly, without preventing code execution through the
1367 dynamic linker. (The glibc project disputes that this is a security
1368 vulnerability; only trusted binaries must be examined using the ldd
1371 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1372 suffered from a one-byte overflow during ~ operator processing (either
1373 on the stack or the heap, depending on the length of the user name).
1374 Reported by Tim RĂŒhsen.
1376 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1377 would sometimes fail to free memory allocated during ~ operator
1378 processing, leading to a memory leak and, potentially, to a denial
1381 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1382 without GLOB_NOESCAPE, could write past the end of a buffer while
1383 unescaping user names. Reported by Tim RĂŒhsen.
1385 CVE-2017-17426: The malloc function, when called with an object size near
1386 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1387 instead of NULL. This was a regression introduced with the new malloc
1388 thread cache in glibc 2.26. Reported by Iain Buclaw.
1390 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1391 to the allocation of too much memory. (This is not a security bug per se,
1392 it is mentioned here only because of the CVE assignment.) Reported by
1395 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1396 of the number of search path components. (This is not a security
1397 vulnerability per se because no trust boundary is crossed if the fix for
1398 CVE-2017-1000366 has been applied, but it is mentioned here only because
1399 of the CVE assignment.) Reported by Qualys.
1401 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1402 for AT_SECURE or SUID binaries could be used to load libraries from the
1405 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1406 succeeds without returning an absolute path due to unexpected behaviour
1407 of the Linux kernel getcwd syscall. Reported by halfdog.
1409 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1410 an object size near the value of SIZE_MAX, would return a pointer to a
1411 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1413 CVE-2018-6551: The malloc function, when called with an object size near
1414 the value of SIZE_MAX, would return a pointer to a buffer which is too
1415 small, instead of NULL.
1417 The following bugs are resolved with this release:
1419 [866] glob: glob should match dangling symlinks
1420 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1421 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1423 [5997] math: Very slow execution of sinf function
1424 [10580] localedata: hr_HR: updated locale
1425 [10871] locale: 'mon' array should contain both nominative and genitive
1427 [12349] localedata: eu_ES: incorrect thousands separator
1428 [13605] localedata: shn_MM: new Shan locale
1429 [13805] localedata: ru_RU: currency should use ',' as radix point
1430 [13953] localedata: km_KH: locale update
1431 [13994] localedata: mjw_IN: new locale
1432 [14121] build: make writes .mo files in po directory
1433 [14333] libc: Fix the race between atexit() and exit()
1434 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1435 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1437 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1438 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1439 width Latin characters
1440 [15332] localedata: es_CU: locale update
1441 [15436] stdio: Don't close or flush stdio streams on abort
1442 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1444 [16148] localedata: ca_ES: incorrect thousands separator
1445 [16750] dynamic-link: ldd should not try to execute the binaries
1447 [16777] localedata: pl_PL: incorrect thousands separator in locale
1448 [16905] localedata: hanzi: new collation
1449 [17563] localedata: cmn_TW: add hanzi collation
1450 [17750] localedata: wrong collation order of diacritics in most locales
1451 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1453 [17956] build: Build fails on missing definitions from header file
1454 nss/nss.h when Mozilla NSS is used for cryptography
1455 [18203] libc: realpath() does not handle unreachable paths correctly
1456 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1457 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1458 [18822] libc: Internal functions are called via PLT
1459 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1460 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1461 [19574] libc: glibc should support building static PIE binaries
1462 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1464 [19971] glob: glob: Do not skip entries with zero d_ino values
1465 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1466 [20008] localedata: km_KH: convert to translit_neutral
1467 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1468 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1469 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1470 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1471 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1473 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1474 they're set, wrong errors returned by gaih_inet when lookup functions
1476 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1477 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1479 [20952] localedata: yuw_PG: new locale
1480 [21084] localedata: charmaps/IBM858: new codepage
1481 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1482 [21242] libc: assert gives pedantic warning in old gcc versions
1483 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1484 __regcall calling convention
1485 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1486 [21326] libc: C99 functions are not declared for C++11 and later if
1487 _GNU_SOURCE is not predefined by g++
1488 [21457] libc: sys/ucontext.h namespace
1489 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1490 [21660] math: GCC fails to compile a formula with tgmath.h
1491 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1492 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1493 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1494 [21684] math: tgmath.h handling of complex integers
1495 [21685] math: tgmath.h handling of bit-fields
1496 [21686] math: tgmath.h handling of __int128
1497 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1499 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1501 [21750] localedata: column width of characters incompatible with classical
1503 [21754] malloc: malloc: Perform as little work as possible after heap
1504 consistency check failures
1505 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1506 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1507 [21791] string: Unused XXX_chk_XXX functions in libc.a
1508 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1510 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1512 [21845] localedata: Added new Locale bho_NP
1513 [21853] localedata: Fix abday Which looks same as day in zh_SG
1514 [21854] localedata: Added New Locale en_SC
1515 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1516 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1517 _dl_runtime_resolve_avx_slow
1518 [21885] network: getaddrinfo: gethosts does not release resolver context
1519 on memory allocation failure
1520 [21899] libc: XPG4.2 sigaction namespace
1521 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1523 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1525 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1526 errno value, causing getaddrinfo to fail
1527 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1528 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1529 instead of EAI_NODATA
1530 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1531 constant PTRACE_SEIZE_DEVEL
1532 [21930] math: C-only gcc builtins used in <math.h> isinf
1533 [21932] network: Unpaired __resolv_context_get in generic get*_r
1535 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1536 [21944] libc: sigval namespace
1537 [21951] localedata: Update hanzi collation by stroke
1538 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1539 sysdeps/x86_64/fpu/e_expf.S
1540 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1541 allocation in syscall loops)
1542 [21959] localedata: Fix Country name for xh_ZA
1543 [21960] localedata: Fix abmon for bem_ZM
1544 [21966] math: AVX2 mathvec functions use FMA without checking
1545 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1546 [21971] localedata: Added New Locale for mfe_MU
1547 [21972] libc: assert macro requires operator== (int) for its argument type
1548 [21973] math: [sparc] libm missing sqrtl compat symbol
1549 [21974] libc: Remove __bb_init_func and __bb_exit_func
1550 [21982] string: stratcliff.c: error: assuming signed overflow does not
1552 [21986] stdio: __guess_grouping is called incorrectly
1553 [21987] math: [sparc32] wrong bits/long-double.h installed
1554 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1556 [22022] localedata: Missing country_name for mni_IN
1557 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1559 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1561 [22026] locale: iconv_open: heap overflow on gconv_init failure
1562 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1563 [22035] math: [m68k] bits/math-inline.h macro namespace
1564 [22038] localedata: Fix abbreviated weeks and months for Somali
1565 [22044] localedata: Remove redundant data for Limburgish Language
1566 [22050] malloc: Linking with -lmcheck does not hook
1567 __malloc_initialize_hook correctly
1568 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1569 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1570 [22070] localedata: charmaps/UTF-8: wcwidth for
1571 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1572 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1573 Jungseong and Jongseong) should be 0
1574 [22078] nss: nss_files performance issue in multi mode
1575 [22082] math: bits/math-finite.h exp10 condition
1576 [22086] libc: pcprofiledump incorrect cross-endian condition
1577 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1578 [22095] network: Name server address allocation memory leak in resolv.conf
1580 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1582 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1583 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1585 [22111] malloc: malloc: per thread cache is not returned when thread exits
1586 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1587 [22134] libc: [linux] implement fexecve with execveat
1588 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1590 [22145] libc: ttyname() gives up too early in the face of namespaces
1591 [22146] math: C++ build issue with float128 on x86_64
1592 [22153] nptl: nptl: save error code before process termination
1593 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1594 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1595 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1596 [22165] libc: [hppa] Text relocations in libc.so
1597 [22180] libc: destructor registered via __cxa_atexit is called twice
1598 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1599 symlinks") cause "make" segfaults
1600 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1602 [22207] libc: FAIL: stdlib/test-atexit-race
1603 [22225] math: nearbyint arithmetic moved before feholdexcept
1604 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1605 [22235] math: iscanonical in C++ and float128
1606 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1607 the svid compat wrapper
1608 [22244] math: ynf and yn are wrong without the svid compat wrapper
1609 [22273] libc: Improper assert in Linux posix_spawn implementation
1610 [22284] libc: -pg -pie doesn't work
1611 [22292] locale: localedef exits with error 4 when it should be error 1
1612 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1613 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1615 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1616 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1618 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1619 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1620 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1621 [22322] libc: [mips64] wrong bits/long-double.h installed
1622 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1623 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1625 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1626 [22343] malloc: Integer overflow in posix_memalign
1627 [22347] libc: getrandom() returns the number of bytes that were copied to
1628 the buffer even though the comments say "Return 0 on success and -1 on
1630 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1631 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1633 [22370] dynamic-link: Incorrect note padding check
1634 [22375] libc: malloc returns pointer from tcache_get when should return
1635 NULL (CVE-2017-17426)
1636 [22377] math: iseqsig, float128 and C++
1637 [22382] localedata: Error in tpi_PG locale
1638 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1639 inside the ASCII printable range
1640 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1642 [22403] localedata: Slash needs escaping in some locales
1643 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1644 [22409] network: res_hnok does not accept some host names used on the
1646 [22412] network: res_dnok, res_hnok should perform syntax checks
1647 [22413] network: ns_name_pton ignores syntactically invalid trailing
1649 [22415] stdio: setvbuf can lead to invalid free/segfault
1650 [22432] build: Non-deterministic build
1651 [22439] malloc: malloc_info should compute summary statistics for all sub-
1653 [22442] network: if_nametoindex could report index for the wrong
1654 networking interface
1655 [22446] build: aliasing violation calling readlink in handle_request
1656 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1657 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1658 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1659 __nscd_hash/__nss_hash
1660 [22463] network: p_secstodate overflow handling
1661 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1662 [22478] libc: sigwait can fail with EINTR
1663 [22505] libc: ldconfig processes include directive in locale-specific
1665 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1666 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1667 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1668 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1669 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1670 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1671 same as for Croatian
1672 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1673 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1674 [22577] libc: missing newline after "cannot allocate TLS data structures
1676 [22588] manual: manual/conf.texi: missing underscore in front of
1678 [22593] math: nextafter and nexttoward are declared with const attribute
1679 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1680 [22603] string: ia64 memchr overflows internal pointer check
1681 [22605] libc: SH clone does not set the exit code correctly
1682 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1684 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1685 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1686 modified in case of success
1687 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1688 [22615] manual: manual: ambiguous wording about errno value in case of
1690 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1692 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1693 binaries or if /proc is not mounted (CVE-2017-16997)
1694 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1695 [22630] build: $(no-pie-ldflag) is no longer effective
1696 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1697 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1698 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1699 [22637] nptl: guard size is subtracted from thread stack size instead of
1701 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1702 [22657] localedata: hu_HU: Avoid double space in date
1703 [22660] math: fmax, fmin sNaN handling on alpha
1704 [22664] libc: New warning of GCC8
1705 [22665] math: alpha: ceil and floor raise inexact exceptions
1706 [22666] math: alpha: trunc raise inexact exceptions
1707 [22667] libc: makecontext lacks stack alignment on i386
1708 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1709 [22679] libc: getcwd(3) can succeed without returning an absolute path
1711 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1712 elision and tunables
1713 [22687] math: [powerpc-nofpu] complex long double functions spurious
1715 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1716 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1717 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1719 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1720 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1722 [22701] nis: Incomplete removal of libnsl
1723 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1724 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1725 [22715] dynamic-link: FAIL: elf/tst-audit10
1726 [22719] libc: Backtrace tests fail on hppa
1727 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1728 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1729 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1730 before the first call to crypt_r () in crypt/badsalttest.c
1737 * A per-thread cache has been added to malloc. Access to the cache requires
1738 no locks and therefore significantly accelerates the fast path to allocate
1739 and free small amounts of memory. Refilling an empty cache requires locking
1740 the underlying arena. Performance measurements show significant gains in a
1741 wide variety of user workloads. Workloads were captured using a special
1742 instrumented malloc and analyzed with a malloc simulator. Contributed by
1743 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1745 * Unicode 10.0.0 Support: Character encoding, character type info, and
1746 transliteration tables are all updated to Unicode 10.0.0, using
1747 generator scripts contributed by Mike FABIAN (Red Hat).
1748 These updates cause user visible changes, especially the changes in
1749 wcwidth for many emoji characters cause problems when emoji sequences
1750 are rendered with pango, see for example:
1751 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1753 * Collation of Hungarian has been overhauled and is now consistent with "The
1754 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1757 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1759 - The GNU C Library will now detect when /etc/resolv.conf has been
1760 modified and reload the changed configuration. The new resolver option
1761 âno-reloadâ (RES_NORELOAD) disables this behavior.
1763 - The GNU C Library now supports an arbitrary number of search domains
1764 (configured using the âsearchâ directive in /etc/resolv.conf);
1765 previously, there was a hard limit of six domains. For backward
1766 compatibility, applications that directly modify the â_resâ global
1767 object are still limited to six search domains.
1769 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1770 Library will now randomly pick a name server from the configuration as a
1771 starting point. (Previously, the second name server was always used.)
1773 * The tunables feature is now enabled by default. This allows users to tweak
1774 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1776 * New function reallocarray, which resizes an allocated block (like realloc)
1777 to the product of two sizes, with a guaranteed clean failure upon integer
1778 overflow in the multiplication. Originally from OpenBSD, contributed by
1779 Dennis Wölfing and RĂŒdiger Sonderfeld.
1781 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1782 These are extended versions of preadv and pwritev, respectively, taking an
1783 additional flags argument. The set of supported flags depends on the
1784 running kernel; full support currently requires kernel 4.7 or later.
1786 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1787 create a new session ID for the spawned process. This feature is
1788 scheduled to be added to the next major revision of POSIX; for the time
1789 being, it is available under _GNU_SOURCE.
1791 * errno.h is now safe to use from C-preprocessed assembly language on all
1792 supported operating systems. In this context, it will only define the
1793 Exxxx constants, as preprocessor macros expanding to integer literals.
1795 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1796 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1797 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1798 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1800 To compile programs that use this feature, the compiler must support
1801 128-bit floating point with the type name _Float128 (as defined by TS
1802 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1803 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1804 must be defined to make the new interfaces visible.
1806 The new functions and macros correspond to those present for other
1807 floating-point types (except for a few obsolescent interfaces not
1808 supported for the new type), with F128 or f128 suffixes; for example,
1809 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1810 printf or scanf formats for the new type; the strfromf128 and strtof128
1811 interfaces should be used instead.
1813 Deprecated and removed features, and other changes affecting compatibility:
1815 * The synchronization that pthread_spin_unlock performs has been changed to
1816 now be equivalent to a C11 atomic store with release memory order to the
1817 spin lock's memory location. Previously, several (but not all)
1818 architectures used stronger synchronization (e.g., containing what is
1819 often called a full barrier). This change can improve performance, but
1820 may affect odd fringe uses of spin locks that depend on the previous
1821 behavior (e.g., using spin locks as atomic variables to try to implement
1822 Dekker's mutual exclusion algorithm).
1824 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1827 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1828 will only be built and installed when the GNU C Library is configured with
1829 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1830 as TIRPC or rpcsvc-proto, to be used.
1832 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1833 libnss_compat, are deprecated, and will not be built or installed by
1836 The NIS(+) support library, libnsl, is also deprecated. By default, a
1837 compatibility shared library will be built and installed, but not headers
1838 or development libraries. Only a few NIS-related programs require this
1839 library. (In particular, the GNU C Library has never required programs
1840 that use 'gethostbyname' to be linked with libnsl.)
1842 Replacement implementations based on TIRPC, which additionally support
1843 IPv6, are available from <https://github.com/thkukuk/>. The configure
1844 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1845 name service modules, to be built and installed.
1847 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1848 support is enabled, the configured recursive resolver must support EDNS.
1849 (Responding to EDNS-enabled queries with responses which are not
1850 EDNS-enabled is fine, but FORMERR responses are not.)
1852 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1853 servers have not supported this opcode for a long time.
1855 * The _res_opcodes variable has been removed from libresolv. It had been
1856 exported by accident.
1858 * <string.h> no longer includes inline versions of any string functions,
1859 as this kind of optimization is better done by the compiler. The macros
1860 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1862 * The nonstandard header <xlocale.h> has been removed. Most programs should
1863 use <locale.h> instead. If you have a specific need for the definition of
1864 locale_t with no other declarations, please contact
1865 libc-alpha@sourceware.org and explain.
1867 * The obsolete header <sys/ultrasound.h> has been removed.
1869 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1871 * The obsolete function cfree has been removed. Applications should use
1874 * The stack_t type no longer has the name struct sigaltstack. This changes
1875 the C++ name mangling for interfaces involving this type.
1877 * The ucontext_t type no longer has the name struct ucontext. This changes
1878 the C++ name mangling for interfaces involving this type.
1880 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1881 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1882 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1883 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1884 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1885 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1886 fpregset_t type no longer has the name struct fpu. This changes the C++
1887 name mangling for interfaces involving those types.
1889 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1890 synced with the kernel:
1892 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1893 are not supported on this architecture and have been removed.
1895 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1896 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1897 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1899 Programs that assume the GET/SETREGS ptrace requests are universally
1900 available will now fail to build, instead of malfunctioning at runtime.
1902 Changes to build and runtime requirements:
1904 * Linux kernel 3.2 or later is required at runtime, on all architectures
1905 supported by that kernel. (This is a change from version 2.25 only for
1908 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1910 * On most architectures, GCC 4.9 or later is required to build the GNU C
1911 Library. On powerpc64le, GCC 6.2 or later is required.
1913 Older GCC versions and non-GNU compilers are still supported when
1914 compiling programs that use the GNU C Library. (We do not know exactly
1915 how old, and some GNU extensions to C may be _de facto_ required. If you
1916 are interested in helping us make this statement less vague, please
1917 contact libc-alpha@sourceware.org.)
1919 Security related changes:
1921 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1922 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1924 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1925 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1927 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1928 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1931 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1932 fixed (CVE-2017-12133).
1934 The following bugs are resolved with this release:
1936 [984] network: Respond to changed resolv.conf in gethostbyname
1937 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1938 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1940 [12189] libc: __stack_chk_fail should not attempt a backtrace
1942 [14096] time: Race condition on timezone/tst-timezone.out
1943 [14172] localedata: az_IR: new locale
1944 [14995] build: glibc fails to build if gold is the default linker, even if
1946 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1947 [16637] network: inet_pton function is accepting IPv6 with bad format
1948 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1949 x86 and other generic code
1950 [16875] localedata: ko_KR: fix lang_name
1951 [17225] localedata: ar_SY: localized month names for May and June are
1953 [17297] localedata: da_DK: wrong date_fmt string
1954 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1955 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1956 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1957 [19066] localedata: ar_SA abbreviated day and month names are in English
1958 [19569] network: resolv: Support an arbitrary number of search domains
1959 [19570] network: Implement random DNS server selection in the stub
1961 [19838] locale: localedef fails on PA-RISC
1962 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1963 order of 0D36 and 0D37
1964 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1966 [20098] libc: FAIL: debug/backtrace-tst on hppa
1967 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1969 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1971 [20313] localedata: Update locale data to Unicode 9.0
1972 [20424] manual: Document how to provide a malloc replacement
1973 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1975 [20686] locale: Add el_GR@euro to SUPPORTED.
1976 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1977 failures consistently
1978 [21015] dynamic-link: Document and fix --enable-bind-now
1979 [21016] nptl: pthread_cond support is broken on hppa
1980 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1981 frame-pointer on i386
1982 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1984 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1985 [21088] libc: Build fails with --enable-static-nss
1986 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1987 generic c code is used
1988 [21109] libc: Tunables broken on big-endian
1989 [21112] math: powf has large ulp errors with base close to 1 and exponent
1991 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1993 [21120] malloc: glibc malloc is incompatible with GCC 7
1994 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1996 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1997 (-0.0) when linking with -lieee
1998 [21171] math: log10, log2 and lgamma return incorrect results
1999 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
2000 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
2001 [21207] localedata: ce_RU: update weekdays from CLDR
2002 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
2003 [21217] localedata: Update months from CLDR-31
2004 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
2005 [21243] libc: support_delete_temp_file should issue warning for failed
2007 [21244] libc: support resolv_test_start() socket fd close should be
2009 [21253] libc: localedef randomly segfaults when using -fstack-check due to
2010 new posix_spawn implementation
2011 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
2012 leads to lower CPU frequency
2013 [21259] libc: [alpha] termios.h missing IXANY for POSIX
2014 [21261] libc: [sparc64] bits/setjmp.h namespace
2015 [21267] network: [mips] bits/socket.h IOC* namespace
2016 [21268] libc: [alpha] termios.h NL2, NL3 namespace
2017 [21270] libc: mmap64 silently truncates large offset values
2018 [21275] libc: posix_spawn always crashes on ia64 now
2019 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
2020 [21280] math: [powerpc] logbl for POWER7 return incorrect results
2021 [21289] libc: Incorrect declaration for 32-bit platforms with
2022 _FILE_OFFSET_BITS=64 causes build error
2023 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
2024 not support gethostbyname4_r
2025 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
2027 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
2029 [21340] libc: Support POSIX_SPAWN_SETSID
2030 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
2031 [21359] network: ns_name_pack needs additional byte in destination buffer
2032 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
2033 against fragmentation attacks (CVE-2017-12132)
2034 [21369] network: resolv: Remove EDNS fallback
2035 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2037 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2038 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2039 [21393] stdio: Missing dup3 error check in freopen, freopen64
2040 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2041 [21399] localedata: Bad description for U00EC in
2042 localedata/charmaps/CP1254
2043 [21411] malloc: realloc documentation error
2044 [21426] network: sys/socket.h uio.h namespace
2045 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2046 [21445] libc: signal.h bsd_signal namespace
2047 [21455] network: Network headers stdint.h namespace
2048 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2050 [21475] network: resolv: Overlong search path is truncated mid-label
2051 [21511] libc: sigstack namespace
2052 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2053 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2054 bits/syscall.h: No such file or directory
2055 [21517] libc: struct sigaltstack namespace
2056 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2057 [21533] localedata: Update locale data to Unicode 10.0
2059 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2060 junk at end of line, first unrecognized character is `@'
2061 [21538] libc: SIG_HOLD missing for XPG4
2062 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2063 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2064 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2065 [21543] libc: sigevent namespace
2066 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2067 size for general purpose registers in mcontext_t structure
2068 [21550] libc: sigwait namespace
2069 [21552] libc: XPG4 bsd_signal namespace
2070 [21554] libc: sigpause namespace
2071 [21560] libc: sys/wait.h signal.h namespace
2072 [21561] libc: waitid namespace
2073 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2074 '/usr/include/stdlib.h': Permission denied
2075 [21575] libc: sys/wait.h missing struct rusage definition
2076 [21584] libc: sigaltstack etc namespace
2077 [21597] libc: siginterrupt namespace
2078 [21607] math: hppa: FAIL: math/test-tgmath
2079 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2081 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2082 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2083 stack and heap (CVE-2017-1000366)
2084 [21625] libc: wait3 namespace
2085 [21654] nss: Incorrect pointer alignment in NSS group merge result
2087 [21657] network: Parse interface zone id for node-local multicast
2088 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2090 [21666] libc: .symver is used on common symbol
2091 [21668] network: resolv: res_init cross-thread broadcast introduces race
2093 [21687] math: tgmath.h totalorder, totalordermag return type
2094 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2096 [21696] libc: Incorrect assumption of of __cpu_mask in
2097 posix/sched_cpucount.c
2098 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2099 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2101 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2102 leading to relocation crash
2103 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2104 `resolv_conf_matches (resp, conf)' failed.
2105 [21710] localedata: Added Samoan language locale for Samoa
2106 [21711] localedata: Pashto yesstr/nostr locale are missing
2107 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2108 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2109 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2110 [21723] localedata: yesstr/nostr missing for Chinese language locale
2111 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2113 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2115 [21728] localedata: New Locale for Tongan language
2116 [21729] localedata: incorrect LC_NAME fields for hi_IN
2117 [21733] localedata: yesstr and nostr are missing for zh_HK
2118 [21734] localedata: Missing yesstr and nostr are for kw_GB
2119 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2120 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2121 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2122 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2124 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2126 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2128 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2129 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2130 [21759] localedata: missing yesstr and nostr for Tigrinya
2131 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2132 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2133 [21767] localedata: Missing Bislama locales
2134 [21768] localedata: Missing yesstr and nostr for aa_ET
2135 [21770] localedata: Missing Field in li_NL
2136 [21778] nptl: Robust mutex may deadlock
2137 [21779] libc: MicroBlaze segfaults when loading libpthread
2138 [21783] localedata: Fix int_select international_call_prefixes
2139 [21784] localedata: Inconsistency in country_isbn
2140 [21788] localedata: Missing Country Postal Abbreviations
2141 [21794] localedata: Added-country_isbn-for-Italy
2142 [21795] localedata: Add/Fix country_isbn for France
2143 [21796] localedata: Added country_isbn for Republic of Korea
2144 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2145 [21799] localedata: Added int_select international_call_prefixes
2146 [21801] localedata: Added int_select international_call_prefixes
2147 [21804] nptl: Double semicolon in thread-shared-types.h
2148 [21807] localedata: LC_ADDRESS fix for pap_CW
2149 [21808] localedata: Fix LC_ADDRESS for pap_AW
2150 [21821] localedata: Added country_name in mai_IN
2151 [21822] localedata: Fix LC_TIME for mai_IN
2152 [21823] localedata: missing yesstr, nostr for sa_IN
2153 [21825] localedata: Fix name_mrs for mag_IN
2154 [21828] localedata: 2.26 changelog should mention user visible changes
2156 [21835] localedata: Added Maithili language locale for Nepal
2157 [21838] localedata: Removed redundant data for the_NP
2158 [21839] localedata: Fix LC_MONETARY for ta_LK
2159 [21844] localedata: Fix Latin characters and Months Sequence.
2160 [21848] localedata: Fix mai_NP Title Name
2165 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2166 24731-2:2010, is supported to enable declarations of functions from that
2167 TR. Note that not all functions from that TR are supported by the GNU C
2170 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2171 18661-1:2014, is supported to enable declarations of functions and macros
2172 from that TS. Note that not all features from that TS are supported by
2175 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2176 18661-4:2015, is supported to enable declarations of functions and macros
2177 from that TS. Note that most features from that TS are not supported by
2180 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2181 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2182 Since the GNU C Library defaults to a much newer revision of POSIX, this
2183 will only affect programs that specifically request an old conformance
2184 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2185 see a change in the visible declarations, but a program compiled with
2186 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2189 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2190 defined by all multithreaded code, but glibc has not required this for
2193 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2194 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2195 will only be available from <sys/sysmacros.h>.
2197 These macros are not part of POSIX nor XSI, and their names frequently
2198 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2199 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2200 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2203 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2204 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2205 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2207 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2208 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2209 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2210 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2211 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2212 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2213 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2214 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2215 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2216 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2217 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2220 * New <math.h> features are added from TS 18661-1:2014:
2222 - Signaling NaN macros: SNANF, SNAN, SNANL.
2224 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2225 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2226 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2228 - llogb functions: the llogb, llogbf and llogbl functions, and the
2229 FP_LLOGB0 and FP_LLOGBNAN macros.
2231 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2234 - Comparison macros: iseqsig.
2236 - Classification macros: iscanonical, issubnormal, iszero.
2238 - Total order functions: totalorder, totalorderf, totalorderl,
2239 totalordermag, totalordermagf, totalordermagl.
2241 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2243 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2244 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2246 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2247 are added to libc. They convert a floating-point number into string.
2249 * Most of glibc can now be built with the stack smashing protector enabled.
2250 It is recommended to build glibc with --enable-stack-protector=strong.
2251 Implemented by Nick Alcock (Oracle).
2253 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2254 intended to be used instead of memset() to erase sensitive data after use;
2255 the compiler will not optimize out calls to explicit_bzero even if they
2256 are "unnecessary" (in the sense that no _correct_ program can observe the
2257 effects of the memory clear).
2259 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2260 to float instead of double. This does not affect the ABI of any libraries
2261 that are part of the GNU C Library, but may affect the ABI of other
2262 libraries that use this type in their interfaces.
2264 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2265 float_t and double_t types are now defined to long double instead of float
2266 and double. These options are not the default, and this does not affect
2267 the ABI of any libraries that are part of the GNU C Library, but it may
2268 affect the ABI of other libraries that use this type in their interfaces,
2269 if they are compiled or used with those options.
2271 * The getentropy and getrandom functions, and the <sys/random.h> header file
2274 * The buffer size for byte-oriented stdio streams is now limited to 8192
2275 bytes by default. Previously, on Linux, the default buffer size on most
2276 file systems was 4096 bytes (and thus remains unchanged), except on
2277 network file systems, where the buffer size was unpredictable and could be
2278 as large as several megabytes.
2280 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2281 for the Linux quota interface which predates kernel version 2.4.22 has
2284 * The malloc_get_state and malloc_set_state functions have been removed.
2285 Already-existing binaries that dynamically link to these functions will
2286 get a hidden implementation in which malloc_get_state is a stub. As far
2287 as we know, these functions are used only by GNU Emacs and this change
2288 will not adversely affect already-built Emacs executables. Any undumped
2289 Emacs executables, which normally exist only during an Emacs build, should
2290 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2292 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2293 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2294 âno-ip6-dotintâ had already been the default, and support for the
2295 âip6-dotintâ option was removed from the Internet in 2006.
2297 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2298 flag from <resolv.h> have been removed. The option relied on a
2299 backwards-incompatible DNS extension which was never deployed on the
2302 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2303 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2304 They were already unimplemented.
2306 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2307 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2308 removed again from the IETF name lookup interface specification in RFC
2309 2553. Applications should use getaddrinfo instead.
2311 * DNSSEC-related declarations and definitions have been removed from the
2312 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2313 decode the data part of DNSSEC record types. Previous versions of glibc
2314 only implemented minimal support for the previous version of DNSSEC, which
2315 is incompatible with the currently deployed version.
2317 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2318 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2319 <arpa/nameser.h> header file because the distinction between RR types and
2320 meta-RR types is not officially standardized, subject to revision, and
2321 thus not suitable for encoding in a macro.
2323 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2324 and rhook members of the res_state type in <resolv.h> have been removed.
2325 The glibc stub resolver did not support these hooks, but the header file
2326 did not reflect that.
2328 * For multi-arch support it is recommended to use a GCC which has
2329 been built with support for GNU indirect functions. This ensures
2330 that correct debugging information is generated for functions
2331 selected by IFUNC resolvers. This support can either be enabled by
2332 configuring GCC with '--enable-gnu-indirect-function', or by
2333 enabling it by default by setting 'default_gnu_indirect_function'
2334 variable for a particular architecture in the GCC source file
2337 * GDB pretty printers have been added for mutex and condition variable
2338 structures in POSIX Threads. When installed and loaded in gdb these pretty
2339 printers show various pthread variables in human-readable form when read
2340 using the 'print' or 'display' commands in gdb.
2342 * Tunables feature added to allow tweaking of the runtime for an application
2343 program. This feature can be enabled with the '--enable-tunables' configure
2344 flag. The GNU C Library manual has details on usage and README.tunables has
2345 instructions on adding new tunables to the library.
2347 * A new version of condition variables functions have been implemented in
2348 the NPTL implementation of POSIX Threads to provide stronger ordering
2351 * A new version of pthread_rwlock functions have been implemented to use a more
2352 scalable algorithm primarily through not using a critical section anymore to
2355 Security related changes:
2357 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2358 have been created with makecontext could fail to terminate due to a
2359 missing .cantunwind annotation. This has been observed to lead to a hang
2360 (denial of service) in some Go applications compiled with gccgo. Reported
2361 by Andreas Schwab. (CVE-2016-6323)
2363 * The DNS stub resolver functions would crash due to a NULL pointer
2364 dereference when processing a query with a valid DNS question type which
2365 was used internally in the implementation. The stub resolver now uses a
2366 question type which is outside the range of valid question type values.
2369 The following bugs are resolved with this release:
2371 [4099] stdio: Overly agressive caching by stream i/o functions.
2372 [7065] build: Support building glibc with -fstack-protector or -fstack-
2374 [9842] localedata: en_CA: incorrect date format
2375 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2376 before it started waiting
2377 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2378 [15765] nptl: sem_open is wrongly a cancellation point
2379 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2380 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2382 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2383 library linked with pthread
2384 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2385 "FIXME: Ingo" issue)
2386 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2387 [17252] libc: getrandom and getentropy syscall
2388 [17730] malloc: thread-local storage is sometimes improperly free()'d
2389 after being __libc_memalign()'d
2390 [18241] stdio: failed fseek on memstream does not set errno and can fail
2392 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2394 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2395 PTHREAD_PRIO_INHERIT mutex on ARM
2396 [18784] network: res_query and related function crash for special record
2397 type queries (CVE-2015-5180)
2398 [19380] math: strtod does not raise "inexact"
2399 [19387] string: Integer overflow in memchr
2400 [19390] string: Integer overflow in strncat
2401 [19398] build: linknamespace tests fail with massively parallel build
2402 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2404 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2405 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2406 [19514] libc: [PATCH] Fix spelling errors in spelling
2407 "implement"/"implementation" in several places
2408 [19582] network: Deprecate RES_USE_INET6
2409 [19673] manual: clog10 docs appear to be erroneous
2410 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2411 causes a segmentation fault
2412 [19826] libc: invalid pointer returned from __tls_get_addr with static
2414 [20016] network: resolv: Remove hooks support from the API
2415 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2417 [20033] math: [x86_64] vectorized math function don't call the __finite
2419 [20116] nptl: use after free in pthread_create
2420 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2421 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2423 [20311] nptl: please install proc_service.h
2424 [20366] libc: Compilation errors in installed headers in strict-compliance
2426 [20370] malloc: malloc: Arena free list management is still racy
2427 (incorrect fix in bug 19243)
2428 [20386] libc: assert (X = 0) does not result in GCC warning
2429 [20432] malloc: malloc: Minimize interface required for interposition
2430 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2431 in _Unwind_Backtrace (CVE-2016-6323)
2432 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2433 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2435 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2436 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2437 [20477] network: resolv: incorrect double-checked locking related to
2439 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2441 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2443 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2444 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2445 cause transition penalty
2446 [20517] math: sparcv9 missing fdiml compat symbol
2447 [20524] manual: strverscmp is inconsistent
2448 [20525] libc: <sys/quota.h> should be based on kernel headers
2449 [20539] math: GCC 7 -static -lm fails to link at -O3
2450 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2452 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2454 [20591] network: Remove obsolete DNSSEC support
2455 [20592] network: DNS resource record type classification macros in
2456 <arpa/nameser.h> are incorrect
2457 [20593] network: Update DNS RR type definitions
2458 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2459 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2461 [20629] network: libresolv: Remove support for bitstring labels
2463 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2464 assertion: "maxidx >= 2"
2465 [20660] math: [arm] Use VSQRT
2466 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2467 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2468 [20689] libc: Test for FMA should also check for AVX.
2469 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2470 [20715] math: iszero macro breaks existing code
2471 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2472 [20728] libc: powerpc: Missing TOC stub in clone
2473 [20729] build: glibc-2.24 fails to build for i486 with -Os
2474 [20750] build: Build fails with default PIE enabled gcc-6.x
2475 [20768] math: [alpha] sqrt fegetenv namespace
2476 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2478 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2479 __FLT_EVAL_METHOD__ is 2
2480 [20790] network: rpcgen buffer overrun in get_prog_declaration
2481 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2482 [20829] libc: crypt snprintf namespace
2483 [20847] libc: tst-vfork3 failure
2484 [20855] math: Default bits/mathdef.h has inappropriate float_t
2485 [20859] math: [sh4] FP_ILOGB0 invalid
2486 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2487 U+20AC), not same as GBK
2488 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2489 [20916] math: pow handling of sNaN arguments
2490 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2491 [20919] math: Bad pow (qNaN, 0) result with -lieee
2492 [20940] math: hypot sNaN handling
2493 [20947] math: fmax, fmin sNaN handling
2494 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2495 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2497 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2498 [20973] nptl: robust mutexes: Lost wake-ups
2499 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2500 [20978] nis: strlen on null pointer in nss_nisplus
2501 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2503 [21014] string: i686 memchr overflows internal pointer check
2504 [21019] libc: [mips] n32 lseek incorrect on overflow
2505 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2506 [21026] libc: [MIPS] readahead syscall is broken on n64
2507 [21028] math: Fallback fesetexceptflag should always succeed
2508 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2509 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2511 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2512 [21061] librt: [microblaze] librt lost clock_* exports
2513 [21073] libc: tunables: insecure environment variables passed to
2514 subprocesses with AT_SECURE
2515 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2519 * The minimum Linux kernel version that this version of the GNU C Library
2520 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2521 kernel version 2.6.32 or later suffices (on architectures that already
2522 required kernel versions more recent than 3.2, those requirements remain
2523 unchanged). Linux 3.2 or later kernel headers are required on all
2526 * The pap_AN locale has been deleted. This has been deprecated for a long
2527 time. It has been replaced by pap_AW & pap_CW, both of which have long
2528 been included in previous releases.
2530 * The readdir_r and readdir64_r functions have been deprecated. It is
2531 recommended to use readdir and readdir64 instead.
2533 * The type âunion waitâ has been removed. It was deprecated in the early
2534 1990s and never part of POSIX. Application code should use the int type
2535 instead of âunion waitâ.
2537 * A new NSS action is added to facilitate large distributed system
2538 administration. The action, MERGE, allows remote user stores like LDAP
2539 to be merged into local user stores like /etc/groups in order to provide
2540 easy to use, updated, and managed sets of merged credentials. The new
2541 action can be used by configuring it in /etc/nsswitch.conf:
2542 group: files [SUCCESS=merge] nis
2543 Implemented by Stephen Gallagher (Red Hat).
2545 * The deprecated __malloc_initialize_hook variable has been removed from the
2548 * The long unused localedef --old-style option has been removed. It hasn't
2549 done anything in over 16 years. Scripts using this option can safely
2552 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2553 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2554 return the next representable value in the direction of positive infinity
2555 and the nextdown functions return the next representable value in the
2556 direction of negative infinity. These are currently enabled as GNU
2559 Security related changes:
2561 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2562 could result in a stack overflow when getnetbyname was called with an
2563 overly long name. (CVE-2016-3075)
2565 * Previously, getaddrinfo copied large amounts of address data to the stack,
2566 even after the fix for CVE-2013-4458 has been applied, potentially
2567 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2568 instead. Reported by Michael Petlan. (CVE-2016-3706)
2570 * The glob function suffered from a stack-based buffer overflow when it was
2571 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2572 Reported by Alexander Cherepanov. (CVE-2016-1234)
2574 * The Sun RPC UDP client could exhaust all available stack space when
2575 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2576 alloca plugin for GCC. (CVE-2016-4429)
2578 * The IPv6 name server management code in libresolv could result in a memory
2579 leak for each thread which is created, performs a failing naming lookup,
2580 and exits. Over time, this could result in a denial of service due to
2581 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2583 The following bugs are resolved with this release:
2585 [1170] localedata: ne_NP: update Nepali locale definition file
2586 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2588 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2589 [6796] math: fdim() does not set errno on overflow
2590 [10354] libc: posix_spawn should use vfork() in more cases than presently
2591 [11213] localedata: localedata: add copyright disclaimer to locale files
2592 [12143] localedata: chr_US: new Cherokee locale
2593 [12450] localedata: sgs_LT: new locale
2594 [12676] localedata: ln_CD: new locale
2595 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2597 [13304] math: fma, fmaf, fmal produce wrong results
2598 [14259] build: --localedir arg to configure is ignored
2599 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2600 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2601 [14934] localedata: es_CL: wrong first weekday chilean locale
2602 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2604 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2606 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2607 [15368] nptl: raise() is not async-signal-safe
2608 [15479] math: ceil, floor, round and trunc raise inexact exception
2609 [15578] localedata: kk_KZ: various updates
2610 [16003] localedata: pap_AN: punt old locale
2611 [16137] localedata: iw_IL: punt old locale
2612 [16190] localedata: eo: new esperanto locale
2613 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2614 [16742] malloc: race condition: pthread_atfork() called before first
2615 malloc() results in unexpected locking behaviour/deadlocks
2616 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2618 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2619 [17565] localedata: pt_PT: wrong (work-)week start
2620 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2621 [17950] build: Build fails with -msse
2622 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2623 [18433] libc: posix_spawn does not return correctly upon failure to
2625 [18453] localedata: charmaps/IBM875: incorrect codes
2626 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2628 [18896] localedata: he_IL: improvements for currency
2629 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2630 Romanian locale data
2631 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2633 [19056] libc: Deprecate readdir_r
2634 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2636 [19198] localedata: nl_NL: small improvements for Dutch locales
2637 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2638 nameservers (CVE-2016-5417)
2639 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2641 [19400] locale: Language missing in "iso-639.def", trivial fix in
2643 [19431] malloc: Deadlock between fflush, getdelim, and fork
2644 [19505] libc: Incorrect file descriptor validity checks in
2645 posix_spawn_file_actions_add{open,close,dup2}
2646 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2647 when using RTLD_NEXT
2648 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2649 `intl/{gettextP,loadinfo}.h'
2650 [19534] libc: execle, execlp may use malloc
2651 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2652 [19573] network: res_nclose and __res_maybe_init disagree about name
2653 server initialization, breaking Hesiod
2654 [19575] localedata: Status of GB18030 tables
2655 [19581] localedata: sr_* date_fmt string contains additional newline
2656 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2658 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2659 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2660 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2661 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2663 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2665 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2667 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2668 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2669 [19633] locale: strfmon_l applies global locale to number formatting
2670 [19642] network: Memory leak in getnameinfo
2671 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2672 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2674 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2675 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2677 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2678 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2680 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2682 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2684 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2685 pointers and lengths in error-case.
2686 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2687 report errors on UTF-16 surrogates values.
2688 [19755] nscd: nscd assertion failure in gc
2689 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2690 [19759] libc: mempcpy shouldn't be inlined
2691 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2692 [19765] libc: s390 needs an optimized mempcpy
2693 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2694 NAME_MAX limit assumption (CVE-2016-1234)
2695 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2696 [19787] network: Missing and incorrect truncation checks in getnameinfo
2697 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2699 [19791] network: Assertion failure in res_query.c with un-connectable name
2701 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2702 [19822] math: libm.so install clobbers old version
2703 [19825] network: resolv: send_vc can return uninitialized data in second
2704 response to getaddrinfo
2705 [19830] network: nss_dns: should check RDATA length against buffer length
2706 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2707 confronted with A/AAAA records of invalid size
2708 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2709 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2710 [19853] stdio: Printing IBM long double in decimal with high precision is
2712 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2713 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2714 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2716 [19865] network: Assertion failure or memory leak in
2717 _nss_dns_getcanonname_r
2718 [19868] network: nss_dns: netent code does not skip over non-PTR records
2719 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2721 [19881] string: Improve x86-64 memset
2722 [19907] string: Incorrect memcpy tests
2723 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2725 [19925] libc: termios.h XCASE namespace
2726 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2727 [19929] libc: limits.h NL_NMAX namespace
2728 [19931] stdio: Memory leak in vfprintf
2729 [19957] libc: clone(CLONE_VM) access invalid parent memory
2730 [19963] localedata: en_IL: New locale
2731 [19989] stdio: stdio.h cuserid namespace
2732 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2734 [19996] locale: langinfo.h nl_langinfo_l namespace
2735 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2736 [20010] network: getaddrinfo: Stack overflow in hostent translation
2738 [20012] stdio: libio: fmemopen append mode failure
2739 [20014] stdio: stdio.h namespace for pre-threads POSIX
2740 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2741 [20023] libc: fcntl.h timespec namespace
2742 [20024] math: [x86_64] vectorized sincos trashes the stack
2743 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2744 [20041] time: sys/time.h timespec namespace
2745 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2746 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2747 [20051] libc: ttyslot in wrong header under wrong conditions
2748 [20054] libc: gethostname not declared for XPG4
2749 [20055] libc: termios.h missing tcgetsid for XPG4
2750 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2752 [20073] libc: sys/stat.h fchmod namespace
2753 [20074] libc: stdlib.h rand_r namespace
2754 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2755 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2757 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2758 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2760 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2761 [20119] libc: Wrong mask for processors level type from CPUID
2762 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2763 AS not supporting AVX512
2764 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2766 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2767 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2769 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2770 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2771 [20178] libc: posix_spawn{p} should not call exit
2772 [20191] stdio: libio: vtables hardening
2773 [20195] string: FMA4 detection requires CPUID execution with register
2775 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2776 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2778 [20212] math: acos (sNaN) returns sNaN
2779 [20213] math: asin (sNaN) returns sNaN
2780 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2781 [20218] math: [i386] asinhl (sNaN) returns sNaN
2782 [20219] math: [i386] atanhl (sNaN) returns sNaN
2783 [20222] stdio: fopencookie: Mangle function pointers
2784 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2785 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2786 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2788 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2789 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2790 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2791 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2792 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2793 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2794 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2795 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2796 [20240] math: modf (sNaN) returns sNaN
2797 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2798 [20250] math: frexp (sNaN) returns sNaN
2799 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2800 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2802 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2803 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2804 subscript is below array bounds [-Werror=array-bounds]
2805 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2806 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2808 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2809 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2811 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2812 "invalid" exceptions
2813 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2814 [20316] localedata: id_ID: Februari instead of Pebruari
2815 [20327] string: POWER8 strcasecmp returns incorrect result
2816 [20347] math: Failure: Test: j0_downward (0xap+0)
2817 [20348] libc: FAIL: misc/tst-preadvwritev64
2818 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2819 [20350] libc: There is no test for p{read,write}64
2820 [20357] math: Incorrect cos result for 1.5174239687223976
2821 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2825 * Unicode 8.0.0 Support: Character encoding, character type info, and
2826 transliteration tables are all updated to Unicode 8.0.0, using new
2827 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2828 These updates cause user visible changes, such as the fixes for bugs
2829 89, 16061, and 18568.
2831 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2832 kernel-internal CPU set size. This means that requests that change the
2833 CPU affinity which failed before (for example, an all-ones CPU mask) will
2834 now succeed. Applications that need to determine the effective CPU
2835 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2836 setting it because the kernel can adjust it (and the previous size check
2837 would not detect this in the majority of cases).
2839 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2840 the following new symbols are used: fts64_children, fts64_close,
2841 fts64_open, fts64_read and fts64_set.
2843 * getaddrinfo now detects certain invalid responses on an internal netlink
2844 socket. If such responses are received, an affected process will
2845 terminate with an error message of "Unexpected error <number> on netlink
2846 descriptor <number>" or "Unexpected netlink response of size <number> on
2847 descriptor <number>". The most likely cause for these errors is a
2848 multi-threaded application which erroneously closes and reuses the netlink
2849 file descriptor while it is used by getaddrinfo.
2851 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2852 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2853 unnecessary serialization of memory allocation requests across threads.
2854 The defect is now corrected. Users should see a substantial increase in
2855 the concurent throughput of allocation requests for applications which
2856 trigger this bug. Affected applications typically create and
2857 destroy threads frequently. (Bug 19048 was reported and analyzed by
2860 * There is now a --disable-timezone-tools configure option for disabling the
2861 building and installing of the timezone related utilities (zic, zdump, and
2862 tzselect). This is useful for people who build the timezone data and code
2863 independent of the GNU C Library.
2865 * The obsolete header <regexp.h> has been removed. Programs that require
2866 this header must be updated to use <regex.h> instead.
2868 * The obsolete functions bdflush, create_module, get_kernel_syms,
2869 query_module and uselib are no longer available to newly linked binaries;
2870 the header <sys/kdaemon.h> has been removed. These functions and header
2871 were specific to systems using the Linux kernel and could not usefully be
2872 used with the GNU C Library on systems with version 2.6 or later of the
2875 * Optimized string, wcsmbs and memory functions for IBM z13.
2876 Implemented by Stefan Liebler.
2878 * Newly linked programs that define a variable called signgam will no longer
2879 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2880 require signgam to be set by those functions must ensure that they use the
2881 variable provided by the GNU C Library and declared in <math.h>, without
2882 defining their own copy.
2884 * The minimum GCC version that can be used to build this version of the GNU
2885 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2886 still be used to compile programs using the GNU C Library.
2888 Security related changes:
2890 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2891 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2893 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2894 the pointer guard feature. It is always enabled. Previously,
2895 LD_POINTER_GUARD could be used to disable security hardening in binaries
2896 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2899 * An integer overflow in hcreate and hcreate_r could lead to an
2900 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2902 * The catopen function no longer has unbounded stack usage. Reported by
2903 Max. (CVE-2015-8779)
2905 * The nan, nanf and nanl functions no longer have unbounded stack usage
2906 depending on the length of the string passed as an argument to the
2907 functions. Reported by Joseph Myers. (CVE-2014-9761)
2909 * A stack-based buffer overflow was found in libresolv when invoked from
2910 libnss_dns, allowing specially crafted DNS responses to seize control
2911 of execution flow in the DNS client. The buffer overflow occurs in
2912 the functions send_dg (send datagram) and send_vc (send TCP) for the
2913 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2914 family. The use of AF_UNSPEC triggers the low-level resolver code to
2915 send out two parallel queries for A and AAAA. A mismanagement of the
2916 buffers used for those queries could result in the response of a query
2917 writing beyond the alloca allocated buffer created by
2918 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2919 the overflow. Thanks to the Google Security Team and Red Hat for
2920 reporting the security impact of this issue, and Robert Holiday of
2921 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2923 The following bugs are resolved with this release:
2925 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2926 [887] math: Math library function "logb" and "nextafter" inconsistent
2927 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2928 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2929 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2930 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2932 [4404] localedata: German translation of "Alarm clock" is misleading
2933 [6799] math: nextafter() and nexttoward() doen't set errno on
2934 overflow/underflow errors
2935 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2937 [10432] nis: _nss_nis_setnetgrent assertion failure
2938 [11460] libc: fts has no LFS support
2939 [12926] network: getaddrinfo()/make_request() may spin forever
2940 [13065] nptl: Race condition in pthread barriers
2941 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2942 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2944 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2945 [14912] libc: Rename non-installed bits/*.h headers
2946 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2947 [15367] math: Let gcc use __builtin_isinf
2948 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2949 [15421] math: lgamma wrongly sets signgam for ISO C
2950 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2951 FE_INVALID with argument out of range
2952 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2954 [15786] dynamic-link: ifunc resolver functions can smash function
2956 [15918] math: Unnecessary check for equality in hypotf()
2957 [16061] localedata: Review / update transliteration data
2958 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2960 [16141] time: strptime %z offset restriction
2961 [16171] math: drem should be alias of remainder
2962 [16296] math: fegetround is pure?
2963 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2964 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2966 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2967 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2969 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2970 "Exception "Inexact" set" on ppc32
2971 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2972 [16517] math: Missing underflow exception from tanf/tan/tanl
2973 [16519] math: Missing underflow exception from sinhf
2974 [16520] math: Missing underflow exception from tanhf
2975 [16521] math: Missing underflow exception from exp2
2976 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2978 [16734] stdio: fopen calls mmap to allocate its buffer
2979 [16961] math: nan function incorrect handling of bad sequences
2980 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2981 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2982 [16985] locale: localedef: confusing error message when opening output
2984 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2985 [17197] locale: Redundant shift character in iconv conversion output at
2987 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2988 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2989 [17250] dynamic-link: static linking breaks nss loading
2990 (getaddrinfo/getpwnam/etc...)
2991 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2993 [17441] math: isnan() should use __builtin_isnan() in GCC
2994 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2995 (related to lock elision)
2996 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2997 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2998 [17887] time: strptime should be able to parse "+01:00" style timezones
2999 [17905] libc: catopen() Multiple unbounded stack allocations
3001 [18084] libc: backtrace (..., 0) dumps core on x86
3002 [18086] libc: nice() sets errno to 0 on success
3003 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
3004 is too large (CVE-2015-8778)
3005 [18251] dynamic-link: SONAME missing when audit modules provides path
3006 [18265] libc: add attributes for wchar string and memory functions
3007 [18370] math: csqrt missing underflows
3008 [18421] libc: [hppa] read-only segment has dynamic relocations
3009 [18472] libc: Obsolete syscall wrappers should be compat symbols
3010 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
3011 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
3012 [18525] localedata: Remove locale timezone information
3013 [18560] libc: [powerpc] spurious bits/ipc.h definitions
3014 [18568] localedata: Update locale data to Unicode 8.0
3015 [18589] locale: sort-test.sh fails at random
3016 [18595] math: ctan, ctanh missing underflows
3017 [18604] libc: assert macro-expands its argument
3018 [18610] math: S390: fetestexcept() reports any exception if DXC-code
3019 contains a vector instruction exception.
3020 [18611] math: j1, jn missing errno setting on underflow
3021 [18618] localedata: sync Chechen locale definitions with other *_RU
3023 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
3024 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
3025 [18665] network: In send_dg, the recvfrom function is NOT always using the
3026 buffer size of a newly created buffer (CVE-2015-7547)
3027 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
3029 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
3031 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
3032 [18699] math: tilegx cproj() for various complex infinities does not yield
3034 [18724] libc: Harden put*ent functions against data injection
3035 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3036 [18755] build: build errors with -DNDEBUG
3037 [18757] stdio: fmemopen fails to set errno on failure
3038 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3040 [18781] libc: openat64 lacks O_LARGEFILE
3041 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3042 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3043 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3044 [18790] math: [ldbl-128ibm] tanhl inaccurate
3045 [18795] libc: stpncpy fortification misses buffer lengths that are
3046 statically too large
3047 [18796] build: build fails for --disable-mathvec
3048 [18803] math: hypot missing underflows
3049 [18820] stdio: fmemopen may leak memory on failure
3050 [18823] math: csqrt spurious underflows
3051 [18824] math: fma spurious underflows
3052 [18825] math: pow missing underflows
3053 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3054 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3055 [18870] build: sem_open.c fails to compile with missing symbol
3057 [18872] stdio: Fix memory leak in printf_positional
3058 [18873] libc: posix_fallocate overflow check ineffective
3059 [18875] math: Excess precision leads incorrect libm
3060 [18877] libc: arm: mmap offset regression
3061 [18887] libc: memory corruption when using getmntent on blank lines
3062 [18918] localedata: hu_HU: change time to HH:MM:SS format
3063 [18921] libc: Regression: extraneous stat() and fstat() performed by
3065 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3066 binaries (CVE-2015-8777)
3067 [18951] math: tgamma missing underflows
3068 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3070 [18953] localedata: lt_LT: change currency symbol to the euro
3071 [18956] math: powf inaccuracy
3072 [18961] math: [i386] exp missing underflows
3073 [18966] math: [i386] exp10 missing underflows
3074 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3075 [18969] build: multiple string test failures due to missing locale
3077 [18970] libc: Reference of pthread_setcancelstate in libc.a
3078 [18977] math: float / long double Bessel functions not in XSI POSIX
3079 [18980] math: i386 libm functions return with excess range and precision
3080 [18981] math: i386 scalb*, ldexp return with excess range and precision
3081 [18982] stdio: va_list and vprintf
3082 [18985] time: Passing out of range data to strftime() causes a segfault
3084 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3085 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3086 [19012] locale: iconv_open leaks memory on error path
3087 [19016] math: clog, clog10 inaccuracy
3088 [19018] nptl: Mangle function pointers in tls_dtor_list
3089 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3090 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3091 [19048] malloc: malloc: arena free list can become cyclic, increasing
3093 [19049] math: [powerpc] erfc incorrect zero sign
3094 [19050] math: [powerpc] log* incorrect zero sign
3095 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3096 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3097 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3098 [19074] network: Data race in _res_hconf_reorder_addrs
3099 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3100 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3101 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3103 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3105 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3106 [19086] manual: posix_fallocate64 documented argument order is wrong.
3107 [19088] math: lround, llround missing exceptions close to overflow
3109 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3110 [19095] math: dbl-64 lrint incorrect for 64-bit long
3111 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3112 [19124] dynamic-link: ld.so failed to build with older assmebler
3113 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3114 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3115 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3116 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3117 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3118 pthread_setaffinity_np
3119 [19156] math: [ldbl-128] j0l spurious underflows
3120 [19164] nptl: tst-getcpu fails with many possible CPUs
3121 [19168] math: math/test-ildoubl and math/test-ldouble failure
3122 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3123 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3125 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3126 (FE_NOMASK_ENV) do not clear SSE exceptions
3127 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3128 _int_new_arena/reused_arena
3129 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3130 [19201] math: dbl-64 remainder incorrect sign of zero result
3131 [19205] math: bits/math-finite.h conditions do not match math.h and
3133 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3134 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3135 for C99-based standards
3136 [19212] libc: features.h not -Wundef clean
3137 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3139 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3140 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3141 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3143 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3144 "inexact" exceptions
3145 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3147 [19242] libc: strtol incorrect in Turkish locales
3148 [19243] malloc: reused_arena can pick an arena on the free list, leading
3149 to an assertion failure and reference count corruption
3150 [19253] time: tzset() ineffective when temporary TZ did not include DST
3152 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3153 [19270] math: [hppa] Shared libm missing __isnanl
3154 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3155 MAP_HUGETLB and MAP_STACK defines
3156 [19313] nptl: Wrong __cpu_mask for x32
3157 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3158 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3159 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3160 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3161 [19363] time: x32: times() return value wrongly truncates/sign extends
3163 [19367] dynamic-link: Improve branch prediction on Silvermont
3164 [19369] network: Default domain name not reset by res_ninit when "search"
3165 / "domain" entry is removed from resolv.conf
3166 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3168 [19385] localedata: bg_BG: time separator should be colon, not comma
3169 [19408] libc: linux personality syscall wrapper may erroneously return an
3170 error on 32-bit architectures
3171 [19415] libc: dladdr returns wrong names on hppa
3172 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3173 IBM905, IBM907, and IBM909
3174 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3175 [19443] build: build failures with -DDEBUG
3176 [19451] build: Make check fails on test-double-vlen2
3177 [19462] libc: Glibc failed to build with -Os
3178 [19465] math: Wrong code with -Os
3179 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3181 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3183 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3184 [19486] math: S390: Math tests fail with "Exception Inexact set".
3185 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3186 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3188 [19590] math: Fail to build shared objects that use libmvec.so functions.
3192 * The following bugs are resolved with this release:
3194 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3195 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3196 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3197 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3198 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3199 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3200 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3201 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3202 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3203 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3204 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3205 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3206 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3207 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3208 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3209 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3210 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3211 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3212 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3213 18657, 18676, 18694, 18696, 18887.
3215 * Cache information can be queried via sysconf() function on s390 e.g. with
3216 _SC_LEVEL1_ICACHE_SIZE as argument.
3218 * A buffer overflow in gethostbyname_r and related functions performing DNS
3219 requests has been fixed. If the NSS functions were called with a
3220 misaligned buffer, the buffer length change due to pointer alignment was
3221 not taken into account. This could result in application crashes or,
3222 potentially arbitrary code execution, using crafted, but syntactically
3223 valid DNS responses. (CVE-2015-1781)
3225 * The time zone file parser has been made more robust against crafted time
3226 zone files, avoiding heap buffer overflows related to the processing of
3227 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3228 large time zone data files. Overly long time zone specifiers in the TZ
3229 variable no longer result in stack overflows and crashes.
3231 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3232 for LD and GD on x86 and x86-64, has been implemented. You will need
3233 binutils-2.24 or later to enable this optimization.
3235 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3236 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3237 Hat). These updates cause user visible changes, such as the fix for bug
3240 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3241 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3242 condition in some applications.
3244 * Added vector math library named libmvec with the following vectorized x86_64
3245 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3247 The library can be disabled with --disable-mathvec. Use of the functions is
3248 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3249 Shared library libmvec.so is linked in as needed when using -lm (no need to
3250 specify -lmvec explicitly for not static builds).
3251 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3253 * A new fmemopen implementation has been added with the goal of POSIX
3254 compliance. The new implementation fixes the following long-standing
3255 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3256 old implementation is still present for use be by existing binaries.
3258 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3259 releases. It has been fixed to match 2.19 and older, but binaries built
3260 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3262 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3263 Contributed by Roland McGrath (Google).
3265 * The header <regexp.h> is deprecated, and will be removed in a future
3266 release. Use of this header will trigger a deprecation warning.
3267 Application developers should update their code to use <regex.h> instead.
3269 This header was formerly part of SUS, but was deprecated in 1994 and
3270 removed from the standard in 2001. Also, the glibc implementation
3271 leaks memory. See BZ#18681 for more details.
3275 * The following bugs are resolved with this release:
3277 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3278 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3279 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3280 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3281 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3282 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3283 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3284 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3285 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3286 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3289 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3290 too little memory for the to-be-scanned arguments and overflow the
3291 allocated buffer. The implementation now correctly computes the required
3292 buffer size when using malloc, and switches to malloc from alloca as
3295 * A new semaphore algorithm has been implemented in generic C code for all
3296 machines. Previous custom assembly implementations of semaphore were
3297 difficult to reason about or ensure that they were safe. The new version
3298 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3299 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3300 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3302 * Port to Altera Nios II has been contributed by Mentor Graphics.
3304 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3305 implementations for powerpc64/powerpc64le.
3306 Implemented by Adhemerval Zanella (IBM).
3308 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3309 and powerpc64le. This may improve lock scaling of existing programs on
3310 HTM capable systems. The lock elision code is only enabled with
3311 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3312 powerpc will issue a transaction abort on every syscall to avoid side
3313 effects being visible outside transactions.
3315 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3316 AArch64. Contributed by ARM Ltd.
3318 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3320 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3321 under certain input conditions resulting in the execution of a shell for
3322 command substitution when the application did not request it. The
3323 implementation now checks WRDE_NOCMD immediately before executing the
3324 shell and returns the error WRDE_CMDSUB as expected.
3326 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3327 processing format strings with a large number of format specifiers.
3329 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3330 infinite loop if the DNS response contained a PTR record of an unexpected
3333 * The minimum GCC version that can be used to build this version of the GNU
3334 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3335 still be used to compile programs using the GNU C Library.
3337 * The GNU C Library is now built with -Werror by default. This can be
3338 disabled by configuring with --disable-werror.
3340 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3342 * The obsolete sigvec function has been removed. This was the original
3343 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3344 programs have been using instead for about 25 years. Of course, ABI
3345 compatibility for old binaries using sigvec remains intact.
3347 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3348 with newer versions of bison.
3350 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3351 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3352 registers overlay two consecutive single-precision registers. MIPS32R2
3353 introduced a new FPU mode (FR=1) where double-precision registers extend the
3354 corresponding single-precision registers which is incompatible with the
3355 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3356 require the use of FR=1 making a transition necessary. New o32 ABI
3357 extensions enable users to migrate over time from the original o32 ABI
3358 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3359 tracks the ABI of any loaded object and verifies that new objects are
3360 compatible. Mode transitions will also be requested as required and
3361 unsupportable objects will be rejected. The ABI checks include both soft and
3362 hard float ABIs for o32, n32 and n64.
3364 GCC 5 with GNU binutils 2.25 onwards:
3365 It is strongly recommended that all o32 system libraries are built using the
3366 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3367 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3368 compiler using --with-fp-32=xx to set this by default.
3372 * The following bugs are resolved with this release:
3374 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3375 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3376 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3377 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3378 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3379 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3380 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3381 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3382 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3383 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3384 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3385 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3386 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3387 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3388 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3390 * Reverted change of ABI data structures for s390 and s390x:
3391 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3392 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3393 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3394 are preserved pointing straight to the same implementation as the old ones.
3395 Given that, new callers will simply provide a too-big buffer to these
3396 functions. Any applications/libraries out there that embed jmp_buf or
3397 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3398 against 2.19 headers will have to rebuilt again. This is necessary in any
3399 case to revert the breakage in their ABI caused by the glibc change.
3401 * Support for file description locks is added to systems running the
3402 Linux kernel. The standard file locking interfaces are extended to
3403 operate on file descriptions, not file descriptors, via the use of
3404 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3405 are associated with an open file instead of a process.
3407 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3409 * The minimum Linux kernel version that this version of the GNU C Library
3410 can be used with is 2.6.32.
3412 * Running the testsuite no longer terminates as soon as a test fails.
3413 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3414 with PASS or FAIL lines for individual tests. A summary of the results is
3415 printed, including a list of failing lists, and "make check" exits with
3416 error status if there were any unexpected failures. "make check
3417 stop-on-test-failure=y" may be used to keep the old behavior.
3419 * The am33 port, which had not worked for several years, has been removed
3422 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3423 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3424 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3425 conflicted with POSIX (support for which was removed in 2.19), the
3426 interfaces those macros enabled remain available when compiling with
3427 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3428 test macros defined.
3430 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3432 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3433 This may improve lock scaling of existing programs on TX capable systems.
3434 The lock elision code is only built with --enable-lock-elision=yes and
3435 then requires a GCC version supporting the TX builtins. With lock elision
3436 default mutexes are elided via __builtin_tbegin, if the cpu supports
3437 transactions. By default lock elision is not enabled and the elision code
3440 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3441 copy the path argument. This allowed programs to cause posix_spawn to
3442 deference a dangling pointer, or use an unexpected pathname argument if
3443 the string was modified after the posix_spawn_file_actions_addopen
3446 * All supported architectures now use the main glibc sysdeps directory
3447 instead of some being in a separate "ports" directory (which was
3448 distributed separately before glibc 2.17).
3450 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3451 On configurations that support it (all Linux configurations), it's now
3452 used regardless of the --enable-add-ons switch to configure. It is no
3453 longer possible to build such configurations without pthreads support.
3455 * Locale names, including those obtained from environment variables (LANG
3456 and the LC_* variables), are more tightly checked for proper syntax.
3457 setlocale will now fail (with EINVAL) for locale names that are overly
3458 long, contain slashes without starting with a slash, or contain ".." path
3459 components. (CVE-2014-0475) Previously, some valid locale names were
3460 silently replaced with the "C" locale when running in AT_SECURE mode
3461 (e.g., in a SUID program). This is no longer necessary because of the
3464 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3465 with application code using Intel MPX instructions. (With all previous
3466 versions, the MPX register state could be clobbered when making calls
3467 into or out of a shared library.) Note that while the new dynamic
3468 linker is compatible with all known x86 hardware whether or not it
3469 supports Intel MPX, some x86 instruction-set emulators might fail to
3470 handle the new instruction encodings. This is known to affect Valgrind
3471 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3472 release), and might affect other tools that do instruction emulation.
3474 * Support for loadable gconv transliteration modules has been removed.
3475 The support for transliteration modules has been non-functional for
3476 over a decade, and the removal is prompted by security defects. The
3477 normal gconv conversion modules are still supported. Transliteration
3478 with //TRANSLIT is still possible, and the //IGNORE specifier
3479 continues to be supported. (CVE-2014-5119)
3481 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3482 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3483 resulting a denial-of-service security vulnerability in applications which
3484 use functions related to iconv. (CVE-2014-6040)
3488 * The following bugs are resolved with this release:
3490 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3491 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3492 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3493 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3494 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3495 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3496 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3497 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3498 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3499 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3500 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3501 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3502 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3503 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3504 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3505 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3506 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3507 16431, 16453, 16474, 16506, 16510, 16529
3509 * Slovenian translations for glibc messages have been contributed by the
3510 Translation Project's Slovenian team of translators.
3512 * The public headers no longer use __unused nor __block. This change is to
3513 support compiling programs that are derived from BSD sources and use
3514 __unused internally, and to support compiling with Clang's -fblock
3515 extension which uses __block.
3517 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3518 large collation sequences to optimize multiple passes. This cache
3519 computation may overflow for large collation sequences and may cause a
3520 stack or buffer overflow. This is now fixed to use a slower algorithm
3521 which does not use a cache if there is an integer overflow.
3523 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3524 rules for large collation sequences to optimize multiple passes and falls
3525 back to alloca if malloc fails, resulting in a possible stack overflow.
3526 The implementation now falls back to an uncached collation sequence lookup
3529 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3530 initialized for static applications resulting in the security feature
3531 being disabled. The pointer guard is now correctly initialized to a
3532 random value for static applications. Existing static applications need
3533 to be recompiled to take advantage of the fix (bug 15754).
3535 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3536 to the d_name member of struct dirent, or omit the terminating NUL
3537 character. (Bugzilla #14699).
3539 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3540 aligned_alloc functions could allocate too few bytes or corrupt the
3541 heap when passed very large allocation size values (Bugzilla #15855,
3544 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3545 for AF_INET6 has been fixed (Bugzilla #16072).
3547 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3548 pap_CW, quz_PE, the_NP.
3550 * Substantially revised locales: gd_GB, ht_HT
3552 * The LC_ADDRESS field was updated to support country_car for almost all
3555 * ISO 1427 definitions were updated.
3557 * ISO 3166 definitions were updated.
3559 * The localedef utility now supports --big-endian and --little-endian
3560 command-line options to generate locales for a different system from that
3561 for which the C library was built.
3563 * Binary locale files now only depend on the endianness of the system for
3564 which they are generated and not on other properties of that system. As a
3565 consequence, binary files generated with new localedef may be incompatible
3566 with old versions of the GNU C Library, and binary files generated with
3567 old localedef may be incompatible with this version of the GNU C Library,
3568 in the following circumstances:
3570 + Locale files may be incompatible on m68k systems.
3572 + Locale archive files (but not separate files for individual locales) may
3573 be incompatible on systems where plain "char" is signed.
3575 * The configure option --disable-versioning has been removed. Builds with
3576 --disable-versioning had not worked for several years.
3578 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3579 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3581 * SystemTap probes for malloc have been introduced.
3583 * SystemTap probes for slow multiple precision fallback paths of
3584 transcendental functions have been introduced.
3586 * Support for powerpc64le has been added.
3588 * The soft-float powerpc port now supports e500 processors.
3590 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3592 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3593 set of header declarations that are enabled by default, even when other
3594 feature test macros or compiler options such as -std=c99 would otherwise
3595 disable some of those declarations.
3597 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3598 conflict with POSIX. The libbsd-compat library (which was a dummy library
3599 that did nothing) has also been removed.
3601 * Preliminary documentation about Multi-Thread, Async-Signal and
3602 Async-Cancel Safety has been added.
3604 * Change of ABI data structures for s390 and s390x:
3605 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3606 allow for future hardware extensions. All library functions that accept or
3607 return these structures were versioned in order to provide backwards
3608 compatibility with existing code. However, not all cases can be handled
3609 with interface versioning. If an application embeds either structure into
3610 another structure and that structure is passed to another compilation unit
3611 which expects the newer larger-sized object then any access to the new
3612 fields will result in undefined behaviour. Similarly any access to fields
3613 that were moved by the enlarging of the structures will cause undefined
3614 behaviour. To fix the undefined behaviour all objects that are part of the
3615 final in-memory image must agree on the size of structures, and this may
3616 require recompilation.
3620 * The following bugs are resolved with this release:
3622 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3623 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3624 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3625 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3626 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3627 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3628 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3629 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3630 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3631 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3632 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3633 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3634 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3637 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3638 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3639 Distributions can re-enable building and using pt_chown via the new configure
3640 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3641 considerable security risks and should only be used if the distribution
3642 understands and accepts the risks.
3644 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3647 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3648 fixed (Bugzilla #15330).
3650 * Add support for calling C++11 thread_local object destructors on thread
3651 and program exit. This needs compiler support for offloading C++11
3652 destructor calls to glibc.
3654 * Improved worst case performance of libm functions with double inputs and
3657 * Support for priority inherited mutexes in pthread condition variables on
3658 non-x86 architectures.
3660 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3662 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3664 * Optimized string functions for ARM. Implemented by Will Newton and
3667 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3669 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3672 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3673 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3675 * Added a benchmark framework to track performance of functions in glibc.
3677 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3678 It is based on draft TS 18661 and currently enabled as a GNU extension.
3680 * On Linux, the clock function now uses the clock_gettime system call
3681 for improved precision, rather than old times system call.
3683 * Added support for version-3 tz format files. This is needed when using
3684 the tz database release 2013e or later, and affects a few unusual cases --
3685 currently only TZ='America/Godthab' for time stamps after 2037.
3687 * Added new API functions pthread_getattr_default_np and
3688 pthread_setattr_default_np to get and set the default pthread
3689 attributes of a process.
3691 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3692 This may improve lock scaling of existing programs on TSX capable systems.
3693 When the --enable-lock-elision=yes parameter is specified at configure
3694 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3697 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3698 availability). Implemented by Ryan S. Arnold.
3700 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3704 * The following bugs are resolved with this release:
3706 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3707 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3708 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3709 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3710 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3711 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3712 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3713 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3714 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3715 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3716 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3717 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3718 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3719 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3720 14879, 14889, 14893, 14898, 14914.
3722 * Optimization of memcpy for MIPS.
3724 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3725 EMFILE has been fixed (Bugzilla #14889).
3727 * The add-on ports collection is now distributed in the "ports" subdirectory
3728 of the main GNU C Library distribution, rather than separately.
3730 * Port to ARM AArch64 contributed by Linaro.
3732 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3733 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3735 Implemented by Andreas Krebbel.
3737 * The new function secure_getenv allows secure access to the environment,
3738 returning NULL if running in a SUID/SGID process. This function replaces
3739 the internal function __secure_getenv.
3741 * SystemTap static probes have been added into the dynamic linker.
3742 Implemented by Gary Benson.
3744 * Optimizations of string functions strstr, strcasestr and memmem.
3745 Implemented by Maxim Kuvyrkov.
3747 * The minimum Linux kernel version that this version of the GNU C Library
3748 can be used with is 2.6.16.
3750 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3751 powerpc POWER7. Implemented by Will Schmidt.
3753 * New configure option --disable-nscd builds the C library such that it
3754 never attempts to contact the Name Service Caching Daemon (nscd).
3755 New configure option --disable-build-nscd avoids building nscd itself;
3756 this is the default if --disable-nscd is used.
3758 * Improved support for cross-compilation, including cross-testing and
3759 bootstrap builds without a previously built glibc.
3761 * Several testsuite tests are now able to test multiple IFUNC variants of an
3762 interface, rather than just testing the one that would be chooen by
3765 * New configure options --with-bugurl and --with-pkgversion, for
3766 distributors to use to embed their bug-reporting and package version
3767 information in --help and --version output.
3769 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3770 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3771 allows creation of chroots without the procfs mounted on /proc.
3773 * The `crypt' function now fails if passed salt bytes that violate the
3774 specification for those values. On Linux, the `crypt' function will
3775 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3776 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3777 when the mode is enabled.
3779 * The `clock_*' suite of functions (declared in <time.h>) is now available
3780 directly in the main C library. Previously it was necessary to link with
3781 -lrt to use these functions. This change has the effect that a
3782 single-threaded program that uses a function such as `clock_gettime' (and
3783 is not linked with -lrt) will no longer implicitly load the pthreads
3784 library at runtime and so will not suffer the overheads associated with
3785 multi-thread support in other code such as the C++ runtime library.
3787 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3792 * The following bugs are resolved with this release:
3794 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3795 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3796 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3797 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3798 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3799 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3800 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3801 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3802 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3803 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3804 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3805 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3806 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3807 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3808 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3809 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3810 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3811 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3812 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3813 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3814 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3815 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3818 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3819 configuring glibc with:
3820 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3821 Visit <https://sites.google.com/site/x32abi/> for more x32 ABI info.
3822 Implemented by H.J. Lu.
3826 + define static_assert
3828 + do not declare gets
3830 + declare at_quick_exit and quick_exit also for ISO C11
3832 + aligned_alloc. NB: The code is deliberately allows the size parameter
3833 to not be a multiple of the alignment. This is a moronic requirement
3834 in the standard but it is only a requirement on the caller, not the
3837 + timespec_get added
3839 + uchar.h support added
3841 + CMPLX, CMPLXF, CMPLXL added
3843 Implemented by Ulrich Drepper.
3845 * Support for the IA-64 has been moved to ports.
3847 * Remove support for anything but ELF binary format
3849 * Checking versions of poll, ppoll added.
3850 Implemented by Ulrich Drepper.
3852 * More generic and 64-bit performance optimizations to math functions.
3853 Implemented by Ulrich Drepper.
3855 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3856 headers and functions available at compile time as they were before
3857 version 2.14. This option will be removed at some time in the future
3858 after the TI-RPC library becomes fully sufficient for the needs of
3859 existing applications.
3861 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3862 Note that glibc is not expected to work with any Linux kernel version
3865 * New header <sys/auxv.h> and function getauxval allowing easy access to
3866 the AT_* key-value pairs passed from the Linux kernel. The header also
3867 defines the HWCAP_* bits associated with the AT_HWCAP key.
3869 * New locales: mag_IN
3871 * New configure option --enable-systemtap builds SystemTap static probes
3872 into libc for setjmp and longjmp and into libpthread for various operations.
3873 So far the setjmp/longjmp probes and some of the libpthread probes are
3874 provided only for i*86 and x86_64.
3875 Implemented by Roland McGrath and Rayson Ho.
3877 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3879 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3882 * More optimized functions for SPARC. Implemented by David S. Miller.
3884 * Improved support for cross-compilation, especially bootstrap builds
3885 without a previously built glibc.
3887 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3888 Chris Metcalf from Tilera.
3890 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3891 now supported for ARM processors.
3893 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3894 as the name of the dynamic linker, to distinguish it from the
3895 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3897 * Support for CRIS has been removed from ports.
3899 * A new class of installed header has been documented for low-level
3900 platform-specific functionality. PowerPC added the first instance with a
3901 function to provide time base register access. Contributed by Tulio
3902 Magno Quites Machado Filho.
3904 * ix86 configurations now install header files that are consistent with
3905 what x86-64 configurations install. These same header files can be used
3906 for -m32, -m64, or -mx32 builds.
3907 Contributed by H.J. Lu.
3909 * Math library bug fixes. A thorough audit of all open math library bugs was
3910 conducted by Joseph Myers. Significant progress was made on many math
3911 library bugs resulting in more accurate exceptions and function results.
3912 Many thanks to all those that contributed including Andreas Jaeger for his
3913 patch review and work on the x87 trigonometric instruction issues.
3915 * Timezone data is no longer installed. Timezone-related binaries and scripts
3916 will continue to be installed. Users should obtain their timezone data from
3917 their distribution provider or from the tzdata package at
3918 <ftp://munnari.oz.au/pub/>.
3922 * The following bugs are resolved with this release:
3924 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3925 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3926 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3927 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3928 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3929 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3930 13484, 13506, 13515, 13523, 13524, 13538, 13540
3932 * New program pldd to list loaded object of a process
3933 Implemented by Ulrich Drepper.
3935 * Add nss_db support back to glibc. No more dependency on Berkeley db
3936 and support for initgroups lookups.
3937 Implemented by Ulrich Drepper.
3939 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3940 Contributed by HJ Lu.
3942 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3943 Contributed by HJ Lu.
3945 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3946 on x86-32 and x86-64.
3947 Contributed by Liubov Dmitrieva.
3949 * Optimized strchr and strrchr for SSE on x86-32.
3950 Contributed by Liubov Dmitrieva.
3952 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3953 for x86-64 and x86-32.
3954 Contributed by Liubov Dmitrieva.
3956 * New interfaces: scandirat, scandirat64
3957 Implemented by Ulrich Drepper.
3959 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3960 Implemented by Ulrich Drepper.
3962 * nscd now also caches the netgroup database.
3963 Implemented by Ulrich Drepper.
3965 * Integrate libm with gcc's -ffinite-math-only option.
3966 Implemented by Ulrich Drepper.
3968 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3969 to math functions. Implemented by Ulrich Drepper.
3971 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3972 Implemented by Ulrich Drepper.
3974 * New Linux interfaces: process_vm_readv, process_vm_writev
3976 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3977 Implemented by Ulrich Drepper.
3979 * Optimized nearbyint and strcasecmp for PPC.
3980 Implemented by Adhemerval Zanella.
3982 * New locales: bho_IN, unm_US, es_CU, ta_LK
3986 * The following bugs are resolved with this release:
3988 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3989 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3990 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3991 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3992 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3993 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3994 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3995 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3996 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3997 12795, 12811, 12813, 12814, 12841
3999 * The RPC implementation in libc is obsoleted. Old programs keep working
4000 but new programs cannot be linked with the routines in libc anymore.
4001 Programs in need of RPC functionality must be linked against TI-RPC.
4002 The TI-RPC implementation is IPv6 enabled and there are other benefits.
4004 Visible changes of this change include (obviously) the inability to link
4005 programs using RPC functions without referencing the TI-RPC library and the
4006 removal of the RPC headers from the glibc headers.
4007 Implemented by Ulrich Drepper.
4009 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
4010 syncfs, setns, sendmmsg
4012 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
4013 yue_HK, lij_IT, mhr_RU
4015 * New encodings: CP770, CP771, CP772, CP773, CP774
4017 * New program sotruss to trace calls through PLTs
4018 Implemented by Ulrich Drepper.
4020 * The malloc hook implementation is marked deprecated and will be removed
4021 from the default implementation in the next version. The design never
4022 worked ever since the introduction of threads. Even programs which do
4023 not create threads themselves can use multiple threads created internally.
4027 * The following bugs are resolved with this release:
4029 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
4030 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
4031 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
4032 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4035 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4037 * POWER7 optimizations: memset, memcmp, strncmp
4039 * New optimized string functions for x86-64: strnlen (SSE2),
4040 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4041 Implemented by Ulrich Drepper.
4045 * The following bugs are resolved with this release:
4047 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4048 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4049 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4050 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4051 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4052 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4053 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4054 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4056 * New interfaces: pthread_getname_np, pthread_setname_np
4058 * New Linux interface: recvmmsg
4060 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4062 * The dynamic linker now recognizes supported ABI versions from the
4063 EI_ABIVERSION field in the ELF header.
4064 Implemented by Ulrich Drepper.
4066 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4067 will not be used to fill in password fields in the passwd.byname replies.
4068 Instead it is used to synthesize the shadow.byname table, should it be
4069 missing. This is a useful mode in some installations involving Solaris.
4070 Implemented by Ulrich Drepper.
4072 * New locales: kok_IN, sq_MK, cv_RU
4076 * The following bugs are resolved with this release:
4078 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4079 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4080 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4081 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4082 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4083 10789, 10817, 10823, 10840, 10847
4085 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4087 Implemented by Ulrich Drepper.
4089 * Checking version of longjmp added that fails if an uninitialized stack
4090 frame would be created. Implemented by Ulrich Drepper.
4092 * STT_GNU_IFUNC is now supported in static executables.
4093 Implemented by H.J. Lu.
4095 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4097 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4098 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4099 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4100 Contributed by H.J. Lu.
4102 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4103 Implemented by Ulrich Drepper.
4105 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4107 Contributed by H.J. Lu.
4109 * Support for fma instruction in AVX on x86-64.
4110 Implemented by H.J. Lu and Ulrich Drepper.
4112 * AVX support in x86-64 auditing support in ld.so.
4113 Implemented by H.J. Lu.
4115 * STB_GNU_UNIQUE support added.
4116 Implemented by Ulrich Drepper.
4118 * Implement second fallback mode for optimized DNS lookup for even more
4119 broken environments. If two requests from the same port are not
4120 handled correctly close the socket and open a new one before sending
4121 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4122 can be used to select this mode right away, instead of rediscovering the
4123 necessity is every process again.
4124 Implemented by Ulrich Drepper.
4126 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4127 Implemented by Adam Tkac.
4129 * Optimized iconv conversions for S390x.
4130 Implemented by Andreas Krebbel.
4132 * Using condvars with PI mutexes is now more efficient due to kernel
4133 support for requeueing to PI futexes. NPTL support added for x86-64.
4134 Implemented by Ulrich Drepper.
4136 * New locales: ps_AF, my_MM
4140 * The following bugs are resolved with this release:
4142 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4143 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4144 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4145 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4146 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4148 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4149 Implemented by Ulrich Drepper.
4151 * New Linux interfaces: accept4, fallocate, fallocate64.
4152 Implemented by Ulrich Drepper.
4154 * Correct declarations of string function when used in C++ code. This
4155 could lead to compile errors for invalid C++ code.
4157 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4160 * New POSIX 2008 interface: psiginfo
4161 Implemented by Ulrich Drepper.
4163 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4164 Implemented by Ulrich Drepper.
4166 * Support for selecting between multiple function definitions at runtime
4167 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4169 * The libcrypt library can now use the hash function implementations in
4170 NSS. Implemented by Ulrich Drepper.
4172 * The malloc implementation can be compiled to be less memory efficient
4173 but higher performing in multi-threaded programs.
4174 Implemented by Ulrich Drepper.
4176 * New locales: nan_TW@latin, ks_IN
4178 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4179 Implemented by Ulrich Drepper.
4181 * Extended printf hook support. It is possible to use user-defined types
4182 and extend existing format specifiers.
4183 Implemented by Ulrich Drepper.
4185 * Handling for group shadow files has been added.
4186 Implemented by Ulrich Drepper.
4188 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4189 servers (the case, e.g., for some people using the built-in DNS
4190 server in ADSL modems/routers). There is a once-per-process timeout
4191 in case of a broken server. To avoid it, users can run nscd or put
4192 'options single-request' in /etc/resolv.conf.
4193 Implemented by Ulrich Drepper.
4197 * The following bugs are resolved with this release:
4199 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4200 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4201 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4202 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4203 6968, 6974, 6980, 6995, 7008, 7009, 7029
4205 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4206 up at the same time. Implemented by Ulrich Drepper.
4208 * TLS descriptors for LD and GD on x86 and x86-64.
4209 Implemented by Alexandre Oliva.
4211 * getaddrinfo now handles DCCP and UDPlite.
4212 Implemented by Ulrich Drepper.
4214 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4215 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4216 Implemented by Ulrich Drepper.
4218 * New implementation of memmem, strstr, and strcasestr which is O(n).
4219 Implemented by Eric Blake.
4221 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4223 * Implement "e" option for popen to open file descriptor with the
4224 close-on-exec flag set. Implemented by Ulrich Drepper.
4226 * Implement "b" mode for fmemopen. In this mode writes writes don't
4227 implicitly add a NUL byte and seeks from the end of the buffer really
4228 use the buffer end, not the string length as the basis.
4229 Implemented by Ulrich Drepper.
4231 * Many functions, exported and internal, now atomically set the close-on-exec
4232 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4234 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4236 Implemented by Pravin Satpute.
4238 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4242 * The following bugs are resolved with this release:
4244 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4245 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4246 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4247 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4248 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4249 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4250 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4252 * New locales: bo_CN, bo_IN, shs_CA.
4254 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4256 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4257 Implemented by Pravin Satpute.
4259 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4261 * nscd caches now all timeouts for DNS entries
4262 Implemented by Ulrich Drepper.
4264 * nscd is more efficient and wakes up less often.
4265 Implemented by Ulrich Drepper.
4267 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4268 vdprintf, and obstack_vprintf.
4269 Implemented by Jakub Jelinek.
4271 * Faster memset for x86-64.
4272 Implemented by Harsha Jagasia and H.J. Lu.
4274 * Faster memcpy on x86.
4275 Implemented by Ulrich Drepper.
4277 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4278 Implemented by Ulrich Drepper.
4280 * Faster sqrt and sqrtf implemention for some PPC variants.
4281 Implemented by Steven Munroe.
4285 * The following bugs are resolved with this release:
4287 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4288 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4289 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4290 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4291 5071, 5103, 5104, 5112, 5113, 5184, 5186
4293 * More checking functions: fread, fread_unlocked, open*, mq_open.
4294 Implemented by Jakub Jelinek and Ulrich Drepper.
4296 * Extend fortification to C++. Implemented by Jakub Jelinek.
4298 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4299 by not recognizing 'a' as a modifier when those specs are requested.
4300 Implemented by Jakub Jelinek.
4302 * PPC optimizations to math and string functions.
4303 Implemented by Steven Munroe.
4305 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4306 options to be passed. Implemented by Ulrich Drepper.
4308 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4310 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4311 Implemented by Ulrich Drepper.
4313 * Handle private futexes in the NPTL implementation.
4314 Implemented by Jakub Jelinek and Ulrich Drepper.
4316 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4317 Implemented by Roland McGrath and Ulrich Drepper.
4319 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4321 * SHA-256 and SHA-512 based password encryption.
4322 Implemented by Ulrich Drepper.
4324 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4325 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4328 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4329 Implemented by Ulrich Drepper.
4333 * The following bugs are resolved with this release:
4335 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4336 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4337 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4338 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4339 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4340 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4341 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4344 * New Linux interfaces: epoll_pwait, sched_getcpu.
4346 * New generic interfaces: strerror_l.
4348 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4352 * The following bugs are resolved with this release:
4354 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4355 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4356 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4357 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4358 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4359 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4360 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4361 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4362 3225, 3251, 3252, 3253, 3273
4364 * For Linux, the sorting of addresses returned by getaddrinfo now also
4365 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4366 Implemented by Ulrich Drepper.
4368 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4369 Implemented by Ulrich Drepper.
4371 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4373 * New iconv module for MIK. Contributed by Alexander Shopov.
4375 * For sites with broken group and/or passwd database, the auto-propagate
4376 option of nscd can prevent creating ID lookup entries from the results
4377 of a name lookup and vice versa. This usually is no problem but some
4378 site might have problems with the default behavior.
4379 Implemented by Ulrich Drepper.
4381 * Iterating over entire database in NIS can be slow. With the
4382 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4383 to trade time for memory. The entire database will be read at once.
4384 Implemented by Ulrich Drepper.
4386 * The interfaces introduced in RFC 3542 have been implemented by
4389 * Support for the new ELF hash table format was added by Ulrich Drepper.
4391 * Support for priority inheritance mutexes added by Jakub Jelinek and
4394 * Support for priority protected mutexes added by Jakub Jelinek.
4396 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4397 or_IN, csb_PL, fy_NL, sr_ME.
4401 * More overflow detection functions.
4403 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4404 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4406 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4407 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4408 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4409 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4410 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4411 by Masahide Washizawa.
4413 * It is now possible to install audit libraries for the dynamic linker using
4414 LD_AUDIT. Implemented by Ulrich Drepper.
4416 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4417 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4418 For a libc and libpthread that works well on Linux 2.4 kernels, we
4419 recommend using the stable 2.3 branch.
4421 * The new function open_wmemstream acts like open_memstream,
4422 but uses a wchar_t wide character buffer.
4424 * The new function ppoll is an improved version of poll, similar to pselect.
4426 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4427 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4428 renameat, unlinkat, linkat, symlinkat, readlinkat.
4430 * New Linux kernel system calls: unshare,
4431 inotify_init, inotify_add_watch, inotify_rm_watch.
4433 * The euidaccess function is now also known by the alias eaccess,
4434 for compatibility with some other systems.
4436 * Timezone data updated to 2006b version.
4440 * The following bugs are resolved with this release:
4442 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4443 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4444 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4445 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4446 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4447 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4449 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4451 * As of this release, GCC 4 can be used to compile the C Library.
4453 * Timezone data updated to 2005m version.
4457 * The following bugs are resolved with this release:
4459 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4460 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4461 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4462 777, 787, 821, 822, 823, 825
4464 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4468 * Support for RFC 3678. Real implementations exist only for Linux so far.
4469 Implemented by Ulrich Drepper.
4471 * nscd can now cache entries persistently. Expiring entries are reloaded.
4472 For speedups the cache can be shared in memory with client processes.
4473 Implemented by Ulrich Drepper.
4475 * nscd can now perform SELinux checks.
4476 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4478 * getaddrinfo queries are now cached. Canonical name lookup is performed
4480 Implemented by Ulrich Drepper.
4482 * The nothrow function attribute is used when headers are used by gcc when
4483 compiling C code. This can avoid significant amounts of exception
4486 * The malloc functions perform more error checking and are stricter when
4487 it comes to reacting on errors. The default action is to terminate
4488 the process after showing an error message. Implemented by Ulrich Drepper.
4490 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4491 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4493 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4494 namespaces using the new function dlmopen(). This feature is of course,
4495 like most other dynamic loading functionality, not available in statically
4496 linked applications. Implemented by Ulrich Drepper.
4498 * Low-overhead boundary checking variants of string and some stdio functions
4499 were added. These are to be used in conjunction with a gcc patch by
4500 Jakub Jelinek which adds calls to these functions if possible.
4501 Implemented by Jakub Jelinek and Ulrich Drepper.
4503 * Old code for several operating systems and machine architectures that
4504 have not been in working condition in a long time have been removed from
4505 the main source tree maintained by the GNU C Library's maintainers.
4506 These files are now reside in the separate `ports' source module
4507 that is usable as an add-on when building the library.
4511 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4512 interrogate the dynamic linker, compatible with the Solaris interface.
4514 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4515 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4517 * getifaddrs now uses the netlink interface on Linux to get its information.
4518 Implemented by Thorsten Kukuk.
4520 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4521 Implemented by Ulrich Drepper.
4523 * support for non-executable stacks on x86 has been added. Changes mostly
4526 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4529 * getaddrinfo now performs destination address selection according to
4534 * Thread-safe interfaces for many functions that access locale data
4535 were added in version 2.3, but these features were omitted from NEWS.
4536 Many functions have variants with an `_l' suffix that take a `locale_t'
4537 object as a parameter rather than consulting the current locale.
4538 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4539 create and maintain `locale_t' objects. Additionally, the new function
4540 `uselocale' sets "the current locale" (as used by functions not so
4541 parameterized) set for an individual thread. These features were added
4542 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4544 * The functions getresuid, getresgid, setresuid, and setresgid, which
4545 have long been available on Linux, are now declared in <unistd.h>
4546 and are now also available on the Hurd.
4548 * ELF thread-local storage support (TLS) now works on x86-64.
4550 * The new dynamic string token $LIB is expanded in shared library names.
4551 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4553 * Aldy Hernandez contributed complete software floating point support for
4554 PowerPC machines with no FPU.
4556 * fexecve is implemented on Linux.
4558 * The `btowc' function should work at least twice as fast due to
4559 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4561 * With approriate thread add-ons cancelable functions are now implemented
4562 in libc.so as well. No need to call the function in libpthread. This
4563 change allowed to finally disable the incorrect and expensive handling
4564 of weak definition in ld.so.
4566 * Yet more PLT entries in libc.so have been removed. We finally arrived
4567 at the bare minimum. Startup times improved appropriately.
4569 * Support for the new Linux/x86 system call interface was added. The
4570 AT_SYSINFO auxiliary vector entry is recognized and handled.
4574 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4577 * iconv (the program and the interface) now accepts empty names (excluding
4578 options like //TRANSLIT) to mean "use charset of current locale".
4580 * localedef can now transliterate characters in strings which are not in
4581 the provided charmap. The information from the input locale is used.
4583 * Prelinking support was added for ELF targets. This requires additional
4584 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4586 * Read-only stdio streams now use mmap to speed up operation by eliminating
4587 copying and buffer underflows. To use add 'm' to the mode string of
4588 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4590 * The malloc functions were completely rewritten by Wolfram Gloger based
4591 on Doug Lea's malloc-2.7.0.c.
4593 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4594 implementation of regex.
4596 * Bruno Haible upgraded the iconv and locale implementation to support
4599 * Contents of the LC_* and LANG environment variables in the CEN style are
4600 not recognized anymore. It never was used. Change by Ulrich Drepper.
4602 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4603 thread-local storage (TLS) ABI on some platforms.
4604 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4606 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4607 EUC-JISX0213, and TSCII.
4609 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4610 BSD-compatible interface for getting all network interface addresses.
4611 Implementation for IPv4 by Roland McGrath.
4613 * Loading of locale data is faster due to the introduction of a locale
4614 archive. Implemented by Roland McGrath and Ulrich Drepper.
4616 * Startup times are significantly reduced by not using exported functions
4617 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4620 * Steven Munroe contributed a port to PowerPC64/Linux.
4624 * The Hurd now uses the GNU libio implementation of stdio rather than the
4625 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4627 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4628 with the same behavior as the Linux system call of the same name.
4632 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4633 128-bit long double format.
4635 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4636 IBM1161, and IBM1162 charsets.
4638 * Andreas Jaeger contributed a port to x86-64/Linux.
4640 * Peter Bruin contributed a port to PowerPC/Hurd.
4642 * libc functions using I/O streams now can handle wide-oriented streams
4645 * optimizations in the dynamic linker. Binaries created by recent binutils
4646 versions start up quicker due to reduced time spent on relocations.
4648 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4652 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4653 asinh, atanh, j0 for the 128-bit long double format.
4655 * Bruno Haible updated all the code handling Unicode in some form to
4656 support Unicode 3.1.
4658 * Speed of regex for single-byte locales is back to previous levels.
4659 Patch by Isamu Hasegawa.
4661 * Alpha, SPARC, and IA-64 now also using floating stacks.
4663 * Startup time of internationalized applications greatly improved through
4664 iconv cache. Use iconvconfig to generate the cache file.
4665 Contributed by Ulrich Drepper.
4667 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4668 severe performance problems. Patch by David Mosberger.
4670 * The Hurd port got a lot more functionality like AIO, various stdio
4671 extensions, etc. Mainly done by Roland McGrath.
4673 * mtrace can now lookup symbols in shared libraries.
4677 * Intel's IA-64 math library is largely integrated. It provides fast and
4678 accurate implementatations for most basic and standard math functions
4679 in float, double, and long double format.
4681 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4682 and asin for the 96-bit long double format and asin, log, tan for the
4683 128-bit long double format.
4685 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4686 The basic double functions exist today. Contributed by Abraham Ziv
4687 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4688 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4690 * An asynchronous name lookup library was added. The interface is designed
4691 after POSIX AIO. The proposal was circulated beforehand to get comments.
4692 No negative ones came in. Implemented by Ulrich Drepper.
4694 * Port to S390/64bit contributed by Martin Schwidefsky
4695 <schwidefsky@de.ibm.com>.
4697 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4698 of functions for Linux/IA-64.
4700 * The RPC code is now thread safe. Threads can now use the same service
4701 of different services at the same time. Patch by Eric Norum
4702 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4704 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4705 family of functions for Linux/S390.
4707 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4708 of functions for Linux/x86.
4710 * Port to Linux/CRIS contributed by Axis Communications.
4714 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4715 we can now check for namespace violations and missing declarations. The
4716 result is that almost all headers are now Unix-compliant (as defined in
4717 the upcoming XPG6). The negative side is that some programs might need
4718 corrections, too, if they depend on the incorrect form of the headers in
4719 previous versions which defined too many symbols and included too many
4722 * regex now handles multibyte character sets correctly.
4723 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4725 * iconv (the program) does now conform to the upcoming XPG6 and handles
4726 charmaps. Instead of the charset names the path of charmaps can be
4727 provided and the conversion happens based on this data.
4728 Contributed by Ulrich Drepper.
4730 * The locale program now provides detailed information about the installed
4735 only lists the names of the supported locales
4739 provides details such as country, language, and codeset name.
4740 Contributed by Ulrich Drepper.
4744 * The gencat program now parses the input file according to the charset
4745 selected by the LC_CTYPE category. This is important for stateful
4746 character sets. To make generating catalogs easier there is a way
4747 to overwrite the charset selected by the locale: before the first
4748 message or $ quote line the catalog can contain a line like
4750 $ codeset=ISO-8859-2
4752 to select the charset (ISO-8859-2 in this case).
4754 Implemented by Shinya Hanataka and Ulrich Drepper.
4756 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4757 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4758 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4760 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4761 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4763 * The LANGUAGE environment variable is now ignored unless the locale is
4764 changed from the default "C" locale.
4766 * The usual bug fixes.
4770 * Greg McGary added runtime support for bounds checking using gcc's
4771 new -fbounded-pointers option. ix86 target is complete. PowerPC
4774 * Thorsten Kukuk added secure mode support to nscd.
4776 * The Berkeley db libraries have been removed.
4778 Related, the nss_db module is now in a separate package since it
4779 obviously requires a database library being available.
4781 * Wide character I/O streams implemented by Ulrich Drepper.
4783 * Functions from the extended socket API added by Ulrich Drepper.
4785 * Functions feenableexcept and fedisableexcept to control the
4786 behaviour of individual exceptions have been added by Andreas Jaeger.
4788 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4790 * The resolver code has been updated from bind 8.2.3-T5B which supports
4791 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4794 This change could in some situations effect backward compatibility. Since
4795 now `_res' is a thread-local instead of a global variable, modifying it
4796 in one thread does not have any effect in other threads.
4798 The resolver library was also extended to allow IPv6 as the transport
4799 protocol for the requests. This work was done by Stig Venaas.
4801 * Compatibility code for K&R C compilers has been removed from the
4802 header files. A ISO C compiler is needed to use the library
4803 (conforming to either C89 or C99 standard).
4805 * Complete rewrite of the localedef program to support multibyte character
4806 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4807 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4808 Implemented by Ulrich Drepper.
4810 Bruno Haible significantly improved the generation and use of the data
4811 structures for the wide character tables.
4813 * Plural handling in gettext implemented by Ulrich Drepper.
4815 * The utmp daemon has been removed.
4817 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4819 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4822 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4824 * POSIX barriers implemented by Kaz Kylheku.
4826 * POSIX spawn function family implemented by Ulrich Drepper.
4828 * POSIX spinlocks are now available.
4830 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4832 * the configure option --enable-kernel=X.Y.Z allows to strip out
4833 compatibility for kernel versions before X.Y.Z. This is currently only
4834 implemented for Linux.
4836 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4837 field sin6_scope_id. This means that all programs using IPv6 should be
4838 recompiled. Don't expect binary compatibility with previous glibc
4841 * various conversion modules for IBM character sets contributed by
4844 * IA-64 port by Jes Sorensen and HJ Lu.
4858 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4860 * New xdr functions are added; some rpc functions are now 64bit clean.
4862 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4864 * Fixed known incompatibilities with glibc 2.0.
4866 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4868 * Optimized a number of functions (especially the ELF dynamic loader).
4870 * Update timezone data files.
4872 * lots of charmaps corrections
4874 * some new locale definitions and charmaps
4879 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4880 conform to POSIX member type requirements. Symbol versions have been
4881 adjusted as needed within the library, and for direct use by applications,
4882 but there is potential for problems if third-party libraries use
4883 struct timeval as part of their interface. This does not present
4884 a problem for X and other "essential" system libraries.
4886 * An additional locale model to support C++ Standard Library locale
4887 model and probably more was implemented by Ulrich Drepper.
4889 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4892 * Miles Bader provided the `argp' function family to support hierachical
4893 command line argument parsing, layered on top of getopt.
4895 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4897 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4900 * scanf recognizes the %a and %A format for scanning floating point numbers.
4902 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4903 information and interfaces for the available integer types.
4905 * about 130 new math functions were added to implement the ISO C9x math
4908 * the new header <complex.h> contains definitions of the complex math
4909 functions from ISO C 9X.
4911 * the new header <tgmath.h> defines generic macros to use complex or
4912 real valued functions.
4914 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4916 * Andreas Jaeger provided a test suite for the math library.
4918 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4920 * Ulrich Drepper added character set conversion functions (iconv).
4922 * Optimized string functions have been added.
4924 * The localedata addon is now part of glibc.
4926 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4928 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4929 daemon for NSS (nscd).
4931 Missing a better place here are some numbers on improvements. Under
4932 Linux 2.1.125 un-tar-ing the kernel sources takes
4936 using local files 12.19s 6.88s 22.91s
4938 using NIS 13.92s 8.91s 26.34s
4940 using NIS & nscd 10.37s 7.34s 25.30s
4942 using NIS+ 27.57s 30.37s 640.46s
4944 using NIS+ & nscd 10.25s 7.83s 26.51s
4946 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4948 Keep in mind that non-namelookup related operations dominate above times.
4949 It was just a common complain that using NIS+ unpacking the kernel is
4952 [1] The old nscd implementation is not available anymore since it was
4953 distributed with glibc up to version 2.0.98 and thus is now replaced.
4955 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4957 * Mark Kettenis provided a Hesiod NSS module.
4959 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4960 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4962 * rcmd can now handle netgroups (Dick Streefland).
4964 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4967 * Support for the IPv6 protocol has been added to the socket API, as per the
4968 latest draft standards.
4970 * Support for Linux 2.2 has been added.
4972 * Interface changes relative to the latest 2.0.x release:
4973 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4974 addseverity NEW: Unix98
4975 alphasort64 NEW: LFS
4976 argp_err_exit_status NEW: argp, GNU ext
4977 argp_error NEW: argp, GNU ext
4978 argp_failure NEW: argp, GNU ext
4979 argp_help NEW: argp, GNU ext
4980 argp_parse NEW: argp, GNU ext
4981 argp_program_bug_address NEW: argp, GNU ext
4982 argp_program_version NEW: argp, GNU ext
4983 argp_program_version_hook NEW: argp, GNU ext
4984 argp_state_help NEW: argp, GNU ext
4985 argp_usage NEW: argp, GNU ext
4986 authdes_create NEW: Secure RPC
4987 authdes_getucred NEW: Secure RPC
4988 authdes_pk_create NEW: Secure RPC
4989 backtrace NEW: GNU ext.
4990 backtrace_symbols NEW: GNU ext.
4991 backtrace_symbols_fd NEW: GNU ext.
4993 cacosf NEW: ISO C 9x
4994 cacosh NEW: ISO C 9x
4995 cacoshf NEW: ISO C 9x
4996 cacoshl NEW: ISO C 9x
4997 cacosl NEW: ISO C 9x
5004 casinf NEW: ISO C 9x
5005 casinh NEW: ISO C 9x
5006 casinhf NEW: ISO C 9x
5007 casinhl NEW: ISO C 9x
5008 casinl NEW: ISO C 9x
5010 catanf NEW: ISO C 9x
5011 catanh NEW: ISO C 9x
5012 catanhf NEW: ISO C 9x
5013 catanhl NEW: ISO C 9x
5014 catanl NEW: ISO C 9x
5015 cbc_crypt NEW: Secure RPC
5019 ccoshf NEW: ISO C 9x
5020 ccoshl NEW: ISO C 9x
5026 cimagf NEW: ISO C 9x
5027 cimagl NEW: ISO C 9x
5028 clearerr_locked REMOVED
5029 clntunix_create NEW: sunrpc ext
5031 clog10 NEW: ISO C 9x
5032 clog10f NEW: ISO C 9x
5033 clog10l NEW: ISO C 9x
5043 cprojf NEW: ISO C 9x
5044 cprojl NEW: ISO C 9x
5046 crealf NEW: ISO C 9x
5047 creall NEW: ISO C 9x
5052 csinhf NEW: ISO C 9x
5053 csinhl NEW: ISO C 9x
5056 csqrtf NEW: ISO C 9x
5057 csqrtl NEW: ISO C 9x
5061 ctanhf NEW: ISO C 9x
5062 ctanhl NEW: ISO C 9x
5064 des_setparity NEW: Secure RPC
5065 ecb_crypt NEW: Secure RPC
5066 endutxent NEW: Unix98
5068 exp10f NEW: ISO C 9x
5069 exp10l NEW: ISO C 9x
5073 fattach NEW: STREAMS
5074 fdetach NEW: STREAMS
5078 feclearexcept NEW: ISO C 9x
5079 fegetenv NEW: ISO C 9x
5080 fegetexceptflag NEW: ISO C 9x
5081 fegetround NEW: ISO C 9x
5082 feholdexcept NEW: ISO C 9x
5084 feraiseexcept NEW: ISO C 9x
5085 ferror_locked REMOVED
5086 fesetenv NEW: ISO C 9x
5087 fesetexceptflag NEW: ISO C 9x
5088 fesetround NEW: ISO C 9x
5089 fetestexcept NEW: ISO C 9x
5090 feupdateenv NEW: ISO C 9x
5091 fflush_locked REMOVED
5095 fgets_unlocked NEW: GNU ext.
5096 fileno_locked REMOVED
5108 fputc_locked REMOVED
5109 fputs_unlocked NEW: GNU ext.
5110 fread_unlocked NEW: GNU ext.
5115 fstatvfs NEW: Unix98
5119 ftruncate64 NEW: LFS
5121 fwrite_unlocked NEW: GNU ext.
5122 gai_strerror NEW: IPv6
5126 getchar_locked REMOVED
5128 getdate_err NEW: Unix98
5129 getdate_r NEW: GNU ext.
5131 getnameinfo NEW: IPv6
5132 getnetname NEW: Secure RPC
5133 getpmsg NEW: STREAMS
5134 getpt NEW: Unix98 PTY
5135 getrlimit64 NEW: LFS
5136 getutxent NEW: Unix98
5137 getutxid NEW: Unix98
5138 getutxline NEW: Unix98
5139 glob64 NEW: GNU ext.
5140 globfree64 NEW: GNU ext.
5141 gnu_get_libc_release NEW: GNU ext.
5142 gnu_get_libc_version NEW: GNU ext.
5143 grantpt NEW: Unix98 PTY
5144 host2netname NEW: Secure RPC
5146 iconv_close NEW: iconv
5147 iconv_open NEW: iconv
5148 if_freenameindex NEW: IPv6
5149 if_indextoname NEW: IPv6
5150 if_nameindex NEW: IPv6
5151 if_nametoindex NEW: IPv6
5152 in6addr_any NEW: IPv6
5153 in6addr_loopback NEW: IPv6
5154 inet6_isipv4mapped NEW: IPv6
5155 isastream NEW: STREAMS
5156 iswblank NEW: GNU ext.
5157 key_decryptsession NEW: Secure RPC
5158 key_decryptsession_pk NEW: Secure RPC
5159 key_encryptsession NEW: Secure RPC
5160 key_encryptsession_pk NEW: Secure RPC
5161 key_gendes NEW: Secure RPC
5162 key_get_conv NEW: Secure RPC
5163 key_secretkey_is_set NEW: Secure RPC
5164 key_setnet NEW: Secure RPC
5165 key_setsecret NEW: Secure RPC
5166 llrint NEW: ISO C 9x
5167 llrintf NEW: ISO C 9x
5168 llrintl NEW: ISO C 9x
5169 llround NEW: ISO C 9x
5170 llroundf NEW: ISO C 9x
5171 llroundl NEW: ISO C 9x
5176 lrintf NEW: ISO C 9x
5177 lrintl NEW: ISO C 9x
5178 lround NEW: ISO C 9x
5179 lroundf NEW: ISO C 9x
5180 lroundl NEW: ISO C 9x
5182 makecontext NEW: Unix98
5183 mempcpy NEW: GNU ext.
5186 modify_ldt NEW: kernel
5190 nearbyint NEW: ISO C 9x
5191 nearbyintf NEW: ISO C 9x
5192 nearbyintl NEW: ISO C 9x
5193 netname2host NEW: Secure RPC
5194 netname2user NEW: Secure RPC
5195 nexttoward NEW: ISO C 9x
5196 nexttowardf NEW: ISO C 9x
5197 nexttowardl NEW: ISO C 9x
5201 passwd2des NEW: Secure RPC
5203 pow10f NEW: GNU ext.
5204 pow10l NEW: GNU ext.
5207 printf_size NEW: GNU ext.
5208 printf_size_info NEW: GNU ext.
5209 profil_counter REMOVED
5210 pthread_mutexattr_getkind_np REPLACED
5211 pthread_mutexattr_setkind_np REPLACED
5212 ptsname NEW: Unix98 PTY
5213 ptsname_r NEW: Unix98 PTY
5215 putchar_locked REMOVED
5216 putgrent NEW: GNU ext.
5218 putpmsg NEW: STREAMS
5219 pututxline NEW: Unix98
5223 readdir64_r NEW: LFS
5224 remquo NEW: ISO C 9x
5225 remquof NEW: ISO C 9x
5226 remquol NEW: ISO C 9x
5228 roundf NEW: ISO C 9x
5229 roundl NEW: ISO C 9x
5231 scalbln NEW: ISO C 9x
5232 scalblnf NEW: ISO C 9x
5233 scalblnl NEW: ISO C 9x
5235 sendfile NEW: kernel
5236 setcontext NEW: Unix98
5237 setrlimit64 NEW: LFS
5238 setutxent NEW: Unix98
5240 sigignore NEW: Unix98
5241 sigqueue NEW: POSIX.1b
5242 sigrelse NEW: Unix98
5243 sigset NEW: POSIX.1b
5244 sigtimedwait NEW: POSIX.1b
5245 sigwaitinfo NEW: POSIX.1b
5246 sincos NEW: GNU ext.
5247 sincosf NEW: GNU ext.
5248 sincosl NEW: GNU ext.
5252 strcasestr NEW: GNU ext.
5253 strtoimax NEW: ISO C 9x
5254 strtoumax NEW: ISO C 9x
5255 strverscmp NEW: GNU ext.
5256 svcauthdes_stats NEW: Secure RPC
5257 svcunix_create NEW: sunrpc etx
5258 svcunixfd_create NEW: sunrpc ext
5259 swapcontext NEW: Unix98
5260 tcgetsid NEW: Unix98 PTY
5261 tdestroy NEW: GNU ext.
5262 tgamma NEW: ISO C 9x
5263 tgammaf NEW: ISO C 9x
5264 tgammal NEW: ISO C 9x
5268 truncf NEW: ISO C 9x
5269 truncl NEW: ISO C 9x
5271 unlockpt NEW: Unix98 PTY
5272 updwtmpx NEW: Unix98
5273 user2netname NEW: Secure RPC
5274 utmpxname NEW: Unix98
5275 versionsort NEW: GNU ext.
5276 versionsort64 NEW: GNU ext.
5278 wcscasecmp NEW: GNU ext.
5279 wcsncasecmp NEW: GNU ext.
5280 wcsnlen NEW: GNU ext.
5281 wcstoimax NEW: ISO C 9x
5282 wcstoll NEW: ISO C 9x
5283 wcstoull NEW: ISO C 9x
5284 wcstoumax NEW: ISO C 9x
5286 wordexp NEW: POSIX.2
5287 wordfree NEW: POSIX.2
5288 write_profiling REMOVED
5289 xdecrypt NEW: Secure RPC
5290 xdr_authdes_cred NEW: Secure RPC
5291 xdr_authdes_verf NEW: Secure RPC
5292 xdr_cryptkeyarg NEW: Secure RPC
5293 xdr_cryptkeyarg2 NEW: Secure RPC
5294 xdr_cryptkeyres NEW: Secure RPC
5295 xdr_getcredres NEW: Secure RPC
5296 xdr_key_netstarg NEW: Secure RPC
5297 xdr_key_netstres NEW: Secure RPC
5298 xdr_keybuf NEW: Secure RPC
5299 xdr_keystatus NEW: Secure RPC
5300 xdr_netnamestr NEW: Secure RPC
5301 xdr_sizeof NEW: Secure RPC
5302 xdr_unixcred NEW: sunrpc ext
5303 xencrypt NEW: Secure RPC
5304 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5315 * inet_ntoa is thread-safe
5317 * updwtmp is moved from libutil to libc
5319 * rewrite of cbrt function
5321 * update of timezone data
5335 * add atoll function
5337 * fix complex problems in Berkeley DB code
5339 * fix math functions
5343 * fixed lots of header problems (especially Linux/GNU specific)
5345 * dynamic loader preserves all registers
5347 * Roland McGrath provided support for handling of auxiliary objects in
5348 the ELF dynamic loader.
5350 * support for parallel builds is improved
5354 * GNU extensions are no longer declared by default. To enable them you
5355 must define the macro `_GNU_SOURCE' in your program or compile with
5358 * The library has changed from using GNU ld symbol aliases to using weak
5359 symbols where available. The ELF object file format supports weak
5360 symbols; GNU ld also supports weak symbols in the a.out format. (There
5361 is also now support for other GNU ld extensions in ELF. Use the
5362 `--with-elf' option to configure to indicate you have ELF, and
5363 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5364 of many files which contained only symbol aliases, reducing the size of
5365 the source and the compiled library; many other files were renamed to
5366 less cryptic names previously occupied by the symbol alias files.
5367 There is a new header file <elf.h> for programs which operate on
5368 files in the ELF format.
5370 * Converted to Autoconf version 2, so `configure' has more options.
5371 Run `configure --help' to see the details.
5373 * The library can now be configured to build profiling, highly-optimized
5374 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5375 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5376 `configure' enable building these extra libraries. The shared library is
5377 built by default when using both ELF and GNU ld. When shared libraries
5378 are enabled, the new library `-ldl' is available for arbitrary run-time
5379 loading of shared objects; its interface is defined in <dlfcn.h>. The
5380 new header file <link.h> gives access to the internals of the run-time
5381 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5382 application of same name on other systems and it provides information
5383 about dynamically linked binaries.
5385 * The C library now provides the run-time support code for profiling
5386 executables compiled with `-pg'. Programs can control the profiling code
5387 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5388 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5389 the support for this file format was contributed by David Mosberger-Tang.
5391 * The math code has been replaced with a math library based on fdlibm from
5392 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5393 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5394 functions. The math functions now reside in a separate library, so
5395 programs using them will need to use `-lm' their linking commands.
5397 * John C. Bowman contributed optimized ix87 assembler inline functions.
5399 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5400 mechanism similar to that found in Solaris 2. This is now used for the
5401 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5402 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5403 file controls what services are used for each individual database. This
5404 works by loading shared libraries with names specified in `nsswitch.conf',
5405 so service modules can be changed or added at any time without even
5406 relinking any program. Currently there are the file, db, and NIS based
5407 NSS services available.
5409 * The new functions `strtoq' and `strtouq' parse integer values from
5410 strings, like `strtol' and `strtoul', but they return `long long int' and
5411 `unsigned long long int' values, respectively (64-bit quantities).
5413 * The new functions `strtof' and `strtold' parse floating-point values from
5414 strings, like `strtod', but they return `float' and `long double' values,
5415 respectively (on some machines `double' and `long double' are the same).
5417 * Ulrich Drepper has contributed new implementations of the floating-point
5418 printing and reading code used in the `printf' family of functions and
5419 `strtod', `strtof', and `strtold'. These new functions are perfectly
5420 accurate, and much faster than the old ones.
5422 * The implementation of the POSIX locale model was completely rewritten by
5423 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5424 to compile the POSIX locale definition.
5426 * The former dummy implementations of the strcoll and strxfrm function are
5427 now replaced by fully functional code contributed by Ulrich Drepper. The
5428 collation information comes from the POSIX locale definitions.
5430 * The new header <langinfo.h> defines an interface for accessing
5431 various locale-dependent data (using the locale chosen with `setlocale').
5433 * Ulrich Drepper has contributed a new suite of functions for operation on
5434 wide-character and multibyte-character strings, in <wchar.h>;
5435 and classification and case conversion of wide characters, in <wctype.h>.
5436 These new functions are conforming to the ISO C, Amendement 1 specification.
5438 * There is now a second implementation of the standard I/O library available.
5439 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5440 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5442 * You can now use positional parameter specifications in format strings
5443 for the `printf' and `scanf' families of functions. For example,
5444 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5445 ``Number 6, Mr Jones''. This is mainly useful when providing different
5446 format strings for different languages, whose grammars may dictate
5447 different orderings of the values being printed. To support this
5448 feature, the interface for `register_printf_handler' has changed; see
5449 the header file <printf.h> for details.
5451 * The `printf' and `scanf' families of functions now understand a new
5452 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5453 to group numbers as indicated by the locale; for `scanf' and friends, this
5454 says to accept as valid only a number with all the proper grouping
5455 separators in the right places. In the default "C" locale, numbers are
5456 not grouped; but locales for specific countries will define the usual
5457 conventions (i.e. separate thousands with `,' in the US locale).
5459 * The pgrp functions have been regularized, slightly incompatibly but much
5460 less confusingly. The core functions are now `getpgid' and `setpgid',
5461 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5462 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5463 provided for compatibility. There is no longer an incompatible `getpgrp'
5464 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5466 * The new header file <fts.h> and suite of functions simplify programs that
5467 operate on directory trees. This code comes from 4.4 BSD.
5469 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5470 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5471 NSS scheme used in glibc.
5473 * There is a new malloc debugging hook `__memalign_hook'.
5475 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5476 `unsigned int' in <sys/types.h>. These are for compatibility only and
5477 their use is discouraged.
5479 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5480 done differently, so that it works even without GNU ld.
5482 * New function `euidaccess' checks allowed access to a file like `access',
5483 but using the effective IDs instead of the real IDs.
5485 * The time zone data files have been updated for the latest and greatest
5486 local time conventions of the countries of the world.
5488 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5491 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5492 for formatting floating-point numbers. They are provided only for
5493 compatibility; new programs should use `sprintf' instead. There are
5494 also equivalent function for the `long double' floating-point type and
5495 all functions also exist in a reentrant form.
5497 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5498 functions for maintaining the login-record files (primarily of use to
5499 system programs such as `login'), and convenient functions for
5500 allocating and initializing a pseudo-terminal (pty) device.
5502 * Ulrich Drepper has contributed new support for System V style
5503 shared memory and IPC on systems that support it.
5505 * Ulrich Drepper has contributed several miscellaneous new functions found
5506 in System V: The `hsearch' family of functions provide an effective
5507 implementation of hash tables; `a64l' and `l64a' provide a very simple
5508 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5511 * Ulrich Drepper has contributed new reentrant counterparts for the
5512 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5514 * Ulrich Drepper has contributed new, highly-optimized versions of several
5515 string functions for the i486/Pentium family of processors.
5517 * Ulrich Drepper has updated the Linux-specific code, based largely
5518 on work done in Hongjiu Lu's version of GNU libc for Linux.
5519 The GNU library now supports Linux versions 2.0.10 and later,
5520 using the ELF object file format (i[3456]86-*-linux).
5522 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5524 * David Mosberger-Tang and Richard Henderson have ported the C library
5525 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5526 dynamic linking support for ELF/Alpha.
5528 * Richard Henderson contributed several Alpha optimized assembler function
5529 for arithmetic and string handling.
5531 * Ulrich Drepper has contributed a new set of message catalog functions to
5532 support multiple languages using the <libintl.h> interface, for use with
5533 his new package GNU gettext. Translation volunteers have contributed
5534 catalogs of the library's messages in Spanish, German, and Korean.
5536 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5537 program and the `catgets' function for reading the catalog files it
5538 creates. (The <libintl.h> interface is preferred; we include the
5539 <nl_types.h> interface using `catgets' only for source compatibility with
5540 programs already written to use it.)
5542 * New header file <values.h> gives SVID-compatible names for <limits.h>
5545 * Various new macros, declarations, and small header files for compatibility
5548 * New function `group_member' is a convenient way to check if a process has
5549 a given effective group ID.
5551 * When using GCC 2.7 and later, the socket functions are now declared in a
5552 special way so that passing an argument of type `struct sockaddr_in *',
5553 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5554 `struct sockaddr *' type, does not generate a type-clash warning.
5556 * New function `error' declared in header file <error.h> is a convenient
5557 function for printing error messages and optionally exiting; this is the
5558 canonical function used in GNU programs. The new functions `err', `warn',
5559 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5560 doing the same thing.
5562 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5563 POSIX.2 `glob' function to do ~ and {...} expansion.
5565 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5566 `clearenv' which is used in POSIX.9 is also available.
5568 * New function `getsid' returns session ID number on systems that support it.
5570 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5571 files <db.h> and <mpool.h> provide a rich set of functions for several
5572 types of simple databases stored in memory and in files, and <ndbm.h> is
5573 an old `ndbm'-compatible interface using the `db' functions. Link with
5574 `-ldb' to get these functions.
5576 * New macro `strdupa' copies a string like `strdup', but uses local stack
5577 space from `alloca' instead of dynamic heap space from `malloc'.
5579 * New function `strnlen' is like `strlen' but searches only a given maximum
5580 number of characters for the null terminator. `stpncpy', `strndup' and
5581 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5584 * New function `statfs' in header <sys/statfs.h>.
5586 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5587 provide convenient functions for operating on blocks of null-terminated
5590 * A new suite of functions in <utmp.h> handle all the details of reading
5591 and writing the utmp file.
5593 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5596 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5597 completely POSIX compliant and also implemented the extended functionality
5598 to handle alternate digit representation and alternate era date formats.
5600 * Ulrich Drepper provided an implementation of the `strptime' function
5601 defined in XPG4.2 which transforms a string into a `struct tm' value.
5603 * Paul Eggert provided the tzselect shell script as part of the timezone
5604 code. The shell script makes it easy to select the correct timezone
5607 * The implementation of the malloc family of functions is completely replaced
5608 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5609 The implementation uses the mmap function (if available) and it is
5610 optimized for the use in multi threaded programs.
5612 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5613 functions. This new functionality is usable by specifying a special
5614 salt string and it is compatible with implementation on *BSD systems.
5616 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5617 `getsubopt' to handle second level command line options, `bsd_signal'
5618 to access BSD style `signal' functionality, the obsolete `regexp' style
5621 * the `lchown' function is available on system which support this
5624 * The implementation of the shadow password handling function was contributed
5627 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5629 * POSIX.1g support was added. The <sys/select.h> header is available,
5630 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5631 implementation of `getaddrinfo'.
5635 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5637 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5638 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5640 * The new function `daemon' from 4.4 BSD is useful for server programs that
5641 want to put themselves in the background.
5643 * Joel Sherrill has contributed support for several standalone boards that
5644 run without an operating system.
5646 * `printf', `scanf' and friends now accept a `q' type modifier for long
5647 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5649 * All of the code taken from BSD (notably most of the math and networking
5650 routines) has been updated from the BSD 4.4-Lite release.
5652 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5654 * The new functions `getdomainname' and `setdomainname' fetch or change the
5655 YP/NIS domain name. These are system calls which exist on systems which
5658 * The time zone data files have been updated for the latest international
5661 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5662 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5666 * The C library now includes support for Sun RPC, from Sun's free
5667 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5668 are included. (There is still no support for YP.)
5670 * Tom Quinn has contributed a port of the C library to SGI machines running
5671 Irix 4 (mips-sgi-irix4).
5673 * The new `lockf' function is a simplified interface to the locking
5674 facilities of `fcntl', included for compatibility.
5676 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5678 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5680 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5683 * The error message printed by `assert' for a failed assertion now includes
5684 the name of the program (if using GNU ld) and the name of the calling
5685 function (with versions of GCC that support this).
5687 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5689 * The library now includes the <sys/mman.h> header file and memory
5690 management functions `mmap', `munmap', `mprotect', `msync', and
5691 `madvise', on systems that support those facilities.
5693 * The interface for `mcheck' has changed slightly: the function called to
5694 abort the program when an allocation inconsistency is detected now takes
5695 an argument that indicates the type of failure. The new function
5696 `mprobe' lets you request a consistency check for a particular block at
5697 any time (checks are normally done only when you call `free' or `realloc'
5700 * It is now possible to easily cross-compile the C library, building on one
5701 system a library to run on another machine and/or operating system. All
5702 you need to do is set the variable `HOST_CC' in `configparms' to the
5703 native compiler for programs to run on the machine you are building on (a
5704 few generator programs are used on Unix systems); set `CC' to the
5707 * The new function `fexecve' (only implemented on the GNU system) executes
5708 a program file given a file descriptor already open on the file.
5712 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5713 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5715 * You can set the variable `libprefix' in `configparms' to specify a prefix
5716 to be prepended to installed library files; this makes it easy to install
5717 the GNU C library to be linked as `-lgnuc' or whatever.
5719 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5720 copies a limited number of characters from a string, and returns the
5721 address of the last character written.
5723 * You no longer need to check for whether the installed `stddef.h' is
5724 compatible with the GNU C library. configure now checks for you.
5726 * You can now define a per-stream `fileno' function to convert the
5727 stream's cookie into an integral file descriptor.
5729 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5730 allocates zero bytes of storage, and returns a unique pointer which
5731 you can pass to `realloc' or `free'. The behavior is undefined if
5732 you dereference this pointer.
5734 * The C library now runs on Sony NEWS m68k machines running either
5735 NewsOS 3 or NewsOS 4.
5737 * The new `syscall' function is a system-dependent primitive function
5738 for invoking system calls. It has the canonical behavior on Unix
5739 systems, including unreliable return values for some calls (such as
5740 `pipe', `fork' and `getppid').
5742 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5743 to `EAGAIN', which is the preferred name. On systems whose kernels
5744 use two distinct codes, the C library now translates EWOULDBLOCK to
5745 EAGAIN in every system call function.
5749 * The GNU C Library Reference Manual is now distributed with the library.
5750 `make dvi' will produce a DVI file of the printed manual.
5751 `make info' will produce Info files that you can read on line using C-h i
5752 in Emacs or the `info' program.
5753 Please send comments on the manual to bug-glibc-manual@gnu.org.
5755 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5757 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5759 * Jason Merrill has contributed a port to the Sequent Symmetry running
5760 Dynix version 3 (i386-sequent-dynix).
5762 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5763 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5765 * New function `memory_warnings' lets you arrange to get warnings when
5766 malloc is running out of memory to allocate, like Emacs gives you.
5768 * The C library now contains the relocating allocator used in Emacs 19 for
5769 its editing buffers. This allocator (ralloc) minimizes allocation
5770 overhead and fragmentation by moving allocated regions around whenever it
5771 needs to. You always refer to a ralloc'd region with a "handle" (a
5772 pointer to a pointer--an object of type `void **').
5774 * There is a new `printf' format: `%m' gives you the string corresponding
5775 to the error code in `errno'.
5777 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5778 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5779 pass, the `a' modifier says to fill in a `char **' you pass with a
5782 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5783 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5784 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5786 * `mkstemp' is a traditional Unix function to atomically create and open a
5787 uniquely-named temporary file.
5791 * The standard location for the file that says what the local timezone is
5792 has changed again. It is now `/usr/local/etc/localtime' (or more
5793 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5795 * The distribution no longer contains any files with names longer than 14
5798 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5799 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5801 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5805 * The configuration process has changed quite a bit. The `configure'
5806 script is now used just like the configuration scripts for other GNU
5807 packages. The `sysdeps' directory hierarchy is much rearranged.
5808 The file `INSTALL' explains the new scheme in detail.
5810 * The header files no longer need to be processed into ANSI C and
5811 traditional C versions. There is just one set of files to install, and
5812 it will work with ANSI or old C compilers (including `gcc -traditional').
5814 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5815 MIPS DECStation running Ultrix 4.
5817 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5818 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5819 made itself into a shared library.
5821 * Yet further improved support for the i386, running 4.3 BSD-like systems
5822 (such as Mach 3 with the Unix single-server), or System V.
5824 * New function `strncasecmp' to do case-insensitive string comparison
5825 with limited length.
5827 * New function `strsep' is a reentrant alternative to `strtok'.
5829 * New functions `scandir' and `alphasort' for searching directories.
5831 * New function `setenv' is a better interface to `putenv'.
5833 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5834 function for traversing a directory tree.
5836 * The GNU obstack package is now also part of the C library.
5837 The new function `open_obstack_stream' creates a stdio stream that
5838 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5839 formatted output directly to an obstack.
5841 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5842 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5844 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5846 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5847 things to your strings.
5849 * There are some new test programs: test-fseek, testmb, and testrand.
5851 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5852 These ports are not finished, but are a good starting place for really
5853 supporting those systems.
5855 * `/etc/localtime' is now the standard location for the file that says what
5856 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5857 This follows the general principle that `/etc' is the place for all local
5858 configuration files.
5860 * The C library header files now use `extern "C"' when used by the C++
5861 compiler, so the C library should now work with C++ code.
5863 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5864 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5867 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5868 function which uses the `merge sort' algorithm, and is said to be
5869 significantly faster than the old GNU `qsort' function. Merge sort is
5870 now the standard `qsort' function. The new algorithm can require a lot
5871 of temporary storage; so, the old sorting function is called when the
5872 required storage is not available.
5874 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5875 provides the Unix `crypt' function, plus some other entry points.
5877 * The code and header files taken from 4.4 BSD have been updated with the
5878 latest files released from Berkeley.
5880 ----------------------------------------------------------------------
5881 Copyright information:
5883 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5885 Permission is granted to anyone to make or distribute verbatim copies
5886 of this document as received, in any medium, provided that the
5887 copyright notice and this permission notice are preserved,
5888 thus giving the recipient permission to redistribute in turn.
5890 Permission is granted to distribute modified versions
5891 of this document, or of portions of it,
5892 under the above conditions, provided also that they
5893 carry prominent notices stating who last changed them.
5896 version-control: never