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 * The GNU C Library now supports a feature test macro _ISOC2X_SOURCE to
13 enable features from the draft ISO C2X standard. Only some features from
14 this draft standard are supported by the GNU C Library, and as the draft
15 is under active development, the set of features enabled by this macro is
16 liable to change. Features from C2X are also enabled by _GNU_SOURCE, or
17 by compiling with "gcc -std=gnu2x".
19 * The <math.h> functions that round their results to a narrower type now
20 have corresponding type-generic macros in <tgmath.h>, as defined in TS
21 18661-1:2014 and TS 18661-3:2015 as amended by the resolution of
22 Clarification Request 13 to TS 18661-3.
24 * The function pthread_clockjoin_np has been added, enabling join with a
25 terminated thread with a specific clock. It allows waiting against
26 CLOCK_MONOTONIC and CLOCK_REALTIME. This function is a GNU extension.
28 * New locale added: mnw_MM (Mon language spoken in Myanmar).
30 * The DNS stub resolver will optionally send the AD (authenticated data) bit
31 in queries if the trust-ad option is set via the options directive in
32 /etc/resolv.conf (or if RES_TRUSTAD is set in _res.options). In this
33 mode, the AD bit, as provided by the name server, is available to
34 applications which call res_search and related functions. In the default
35 mode, the AD bit is not set in queries, and it is automatically cleared in
36 responses, indicating a lack of DNSSEC validation. (Therefore, the name
37 servers and the network path to them are treated as untrusted.)
39 Deprecated and removed features, and other changes affecting compatibility:
41 * The totalorder and totalordermag functions, and the corresponding
42 functions for other floating-point types, now take pointer arguments to
43 avoid signaling NaNs possibly being converted to quiet NaNs in argument
44 passing. This is in accordance with the resolution of Clarification
45 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
46 floating-point arguments directly will continue to work.
48 * The obsolete function stime is no longer available to newly linked
49 binaries, and its declaration has been removed from <time.h>.
50 Programs that set the system time should use clock_settime instead.
52 * We plan to remove the obsolete function ftime, and the header <sys/timeb.h>,
53 in a future version of glibc. In this release, the header still exists
54 but calling ftime will cause a compiler warning. All programs should use
55 gettimeofday or clock_gettime instead.
57 * The gettimeofday function no longer reports information about a
58 system-wide time zone. This 4.2-BSD-era feature has been deprecated for
59 many years, as it cannot handle the full complexity of the world's
60 timezones, but hitherto we have supported it on a best-effort basis.
61 Changes required to support 64-bit time_t on 32-bit architectures have
62 made this no longer practical.
64 As of this release, callers of gettimeofday with a non-null 'tzp' argument
65 should expect to receive a 'struct timezone' whose tz_minuteswest and
66 tz_dsttime fields are zero. (For efficiency reasons, this does not always
67 happen on a few Linux-based ports. This will be corrected in a future
70 All callers should supply a null pointer for the 'tzp' argument to
71 gettimeofday. For accurate information about the time zone associated
72 with the current time, use the localtime function.
74 gettimeofday itself is obsolescent according to POSIX. We have no plans
75 to remove access to this function, but portable programs should consider
76 using clock_gettime instead.
78 * The settimeofday function can still be used to set a system-wide time
79 zone when the operating system supports it. This is because the Linux
80 kernel reused the API, on some architectures, to describe a system-wide
81 time-zone-like offset between the software clock maintained by the kernel,
82 and the "RTC" clock that keeps time when the system is shut down.
84 However, to reduce the odds of this offset being set by accident,
85 settimeofday can no longer be used to set the time and the offset
86 simultaneously. If both of its two arguments are non-null, the call
87 will fail (setting errno to EINVAL).
89 Callers attempting to set this offset should also be prepared for the call
90 to fail and set errno to ENOSYS; this already happens on the Hurd and on
91 some Linux architectures. The Linux kernel maintainers are discussing a
92 more principled replacement for the reused API. After a replacement
93 becomes available, we will change settimeofday to fail with ENOSYS on all
94 platforms when its 'tzp' argument is not a null pointer.
96 settimeofday itself is obsolescent according to POSIX. Programs that set
97 the system time should use clock_settime and/or the adjtime family of
98 functions instead. We may cease to make settimeofday available to newly
99 linked binaries after there is a replacement for Linux's time-zone-like
102 * SPARC ISA v7 is no longer supported. v8 is still supported, but only if
103 the optional CAS instruction is implemented (for instance, LEON processors
104 are still supported, but SuperSPARC processors are not).
106 As the oldest 64-bit SPARC ISA is v9, this only affects 32-bit
109 * If a lazy binding failure happens during dlopen, during the execution of
110 an ELF constructor, the process is now terminated. Previously, the
111 dynamic loader would return NULL from dlopen, with the lazy binding error
112 captured in a dlerror message. In general, this is unsafe because
113 resetting the stack in an arbitrary function call is not possible.
115 * For MIPS hard-float ABIs, the GNU C Library will be configured to need an
116 executable stack unless explicitly configured at build time to require
117 minimum kernel version 4.8 or newer. This is because executing
118 floating-point branches on a non-executable stack on Linux kernels prior to
119 4.8 can lead to application crashes for some MIPS configurations. While
120 currently PT_GNU_STACK is not widely used on MIPS, future releases of GCC are
121 expected to enable non-executable stack by default with PT_GNU_STACK by
122 default and is thus likely to trigger a crash on older kernels.
124 The GNU C Library can be built with --enable-kernel=4.8.0 in order to keep a
125 non-executable stack while dropping support for older kernels.
127 * System call wrappers for time system calls now use the new time64 system
128 calls when available. On 32-bit targets, these wrappers attempt to call
129 the new system calls first and fall back to the older 32-bit time system
130 calls if they are not present. This may cause issues in environments
131 that cannot handle unsupported system calls gracefully by returning
132 -ENOSYS. Seccomp sandboxes are affected by this issue.
134 Changes to build and runtime requirements:
136 * It is no longer necessary to have recent Linux kernel headers to build
137 working (non-stub) system call wrappers on all architectures except 64-bit
138 RISC-V. 64-bit RISC-V requires a minimum kernel headers version of 5.0.
140 * The ChangeLog file is no longer present in the toplevel directory of the
141 source tree. ChangeLog files are located in the ChangeLog.old directory as
142 ChangeLog.N where the highest N has the latest entries.
144 Security related changes:
146 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
147 environment variable during program execution after a security
148 transition, allowing local attackers to restrict the possible mapping
149 addresses for loaded libraries and thus bypass ASLR for a setuid
150 program. Reported by Marcin KoĆcielnicki.
152 The following bugs are resolved with this release:
154 [12031] localedata: iconv -t ascii//translit with Greek characters
155 [15813] libc: Multiple issues in __gen_tempname
156 [17726] libc: [arm, sparc] profil_counter should be compat symbol
157 [18231] libc: ipc_perm struct's mode member has wrong type in sys/ipc.h
158 [19767] libc: vdso is not used with static linking
159 [19903] hurd: Shared mappings not being inherited by children processes
160 [20358] network: RES_USE_DNSSEC sets DO; should also have a way to set AD
161 [20839] dynamic-link: Incomplete rollback of dynamic linker state on
163 [23132] localedata: Missing transliterations in Miscellaneous Mathematical
164 Symbols-A/B Unicode blocks
165 [23518] libc: Eliminate __libc_utmp_jump_table
166 [24026] malloc: malloc_info() returns wrong numbers
167 [24054] localedata: Many locales are missing date_fmt
168 [24214] dynamic-link: user defined ifunc resolvers may run in ldd mode
169 [24304] dynamic-link: Lazy binding failure during ELF
170 constructors/destructors is not fatal
171 [24376] libc: RISC-V symbol size confusion with _start
172 [24682] localedata: zh_CN first weekday should be Monday per GB/T
174 [24824] libc: test-in-container does not install charmap files compatible
176 [24844] regex: regex bad pointer / leakage if malloc fails
177 [24867] malloc: Unintended malloc_info formatting changes
178 [24879] libc: login: utmp alarm timer can arrive after lock acquisition
179 [24880] libc: login: utmp implementation uses struct flock with fcntl64
180 [24882] libc: login: pututline uses potentially outdated cache
181 [24899] libc: Missing nonstring attributes in <utmp.h>, <utmpx.h>
182 [24902] libc: login: Repeating pututxline on EINTR/EAGAIN causes stale
184 [24916] dynamic-link: [MIPS] Highest EI_ABIVERSION value not raised to
186 [24930] dynamic-link: dlopen of PIE executable can result in
187 _dl_allocate_tls_init assertion failure
188 [24950] localedata: Top-of-tree glibc does not build with top-of-tree GCC
189 (stringop-overflow error)
190 [24959] time: librt IFUNC resolvers for clock_gettime and clock_*
191 functions other can lead to crashes
192 [24967] libc: jemalloc static linking causes runtime failure
193 [24986] libc: alpha: new getegid, geteuid and getppid syscalls used
195 [25035] libc: sbrk() failure handled poorly in tunables_strdup
196 [25087] dynamic-link: ldconfig mishandles unusual .dynstr placement
197 [25097] libc: new -Warray-bounds with GCC 10
198 [25112] dynamic-link: dlopen must not make new objects accessible when it
199 still can fail with an error
200 [25139] localedata: Please add the new mnw_MM locale
201 [25149] regex: Array bounds violation in proceed_next_node
202 [25157] dynamic-link: Audit cookie for the dynamic loader is not
203 initialized correctly
204 [25189] libc: glibc's __glibc_has_include causes issues with clang
206 [25194] malloc: malloc.c: do_set_mxfast incorrectly casts the mallopt
208 [25204] dynamic-link: LD_PREFER_MAP_32BIT_EXEC not ignored in setuid
209 binaries (CVE-2019-19126)
210 [25225] libc: ld.so fails to link on x86 if GCC defaults to -fcf-
212 [25226] string: strstr: Invalid result if needle crosses page on s390-z15
214 [25232] string: <string.h> does not enable const correctness for strchr et
216 [25233] localedata: Consider "." as the thousands separator for sl_SI
218 [25241] nptl: __SIZEOF_PTHREAD_MUTEX_T defined twice for x86
219 [25251] build: Failure to run tests when CFLAGS contains -DNDEBUG.
220 [25271] libc: undeclared identifier PTHREAD_MUTEX_DEFAULT when compiling
222 [25323] localedata: km_KH: d_t_fmt contains "m" instead of "%M"
223 [25324] localedata: lv_LV: d_t_fmt contains suspicious words in the time
225 [25396] dynamic-link: Failing dlopen can leave behind dangling GL
226 (dl_initfirst) link map pointer
227 [25401] malloc: pvalloc must not have __attribute_alloc_size__
228 [25423] libc: Array overflow in backtrace on powerpc
229 [25425] network: Missing call to __resolv_context_put in
230 getaddrinfo.c:gethosts
237 * Unicode 12.1.0 Support: Character encoding, character type info, and
238 transliteration tables are all updated to Unicode 12.1.0, using
239 generator scripts contributed by Mike FABIAN (Red Hat).
241 * The dynamic linker accepts the --preload argument to preload shared
242 objects, in addition to the LD_PRELOAD environment variable.
244 * The twalk_r function has been added. It is similar to the existing
245 twalk function, but it passes an additional caller-supplied argument
246 to the callback function.
248 * On Linux, the getdents64, gettid, and tgkill functions have been added.
250 * Minguo (Republic of China) calendar support has been added as an
251 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
254 * The entry for the new Japanese era has been added for ja_JP locale.
256 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
257 pvalloc, memalign, and posix_memalign fail now with total object size
258 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
259 pointer subtraction within the allocated object, where results might
260 overflow the ptrdiff_t type.
262 * The dynamic linker no longer refuses to load objects which reference
263 versioned symbols whose implementation has moved to a different soname
264 since the object has been linked. The old error message, symbol
265 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
266 link time reference, is gone.
268 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
269 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
270 functions. These behave similarly to their "timed" equivalents, but also
271 accept a clockid_t parameter to determine which clock their timeout should
272 be measured against. All functions allow waiting against CLOCK_MONOTONIC
273 and CLOCK_REALTIME. The decision of which clock to be used is made at the
274 time of the wait (unlike with pthread_condattr_setclock, which requires
275 the clock choice at initialization time).
277 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
278 work, new resolvers can use a second argument which can be extended in
279 the future, currently it contains the AT_HWCAP2 value.
281 Deprecated and removed features, and other changes affecting compatibility:
283 * The copy_file_range function fails with ENOSYS if the kernel does not
284 support the system call of the same name. Previously, user space
285 emulation was performed, but its behavior did not match the kernel
286 behavior, which was deemed too confusing. Applications which use the
287 copy_file_range function can no longer rely on glibc to provide a fallback
288 on kernels that do not support the copy_file_range system call, and if
289 this function returns ENOSYS, they will need to use their own fallback.
290 Support for copy_file_range for most architectures was added in version
291 4.5 of the mainline Linux kernel.
293 * The functions clock_gettime, clock_getres, clock_settime,
294 clock_getcpuclockid, clock_nanosleep were removed from the librt library
295 for new applications (on architectures which had them). Instead, the
296 definitions in libc will be used automatically, which have been available
299 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
300 and <sys/stropts.h> have been removed.
302 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
303 resolver flag (deprecated in glibc 2.25) have been removed.
305 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
306 resolver have been removed from <resolv.h>.
308 * With --enable-bind-now, installed programs are now linked with the
311 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
312 configurations) has been removed, following the deprecation of this
313 subarchitecture in version 8 of GCC, and its removal in version 9.
315 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
316 header have been removed.
318 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
319 deprecated and will be removed from a future version of glibc.
320 Application should directly access /proc instead. For obtaining random
321 bits, the getentropy function can be used.
323 Changes to build and runtime requirements:
325 * GCC 6.2 or later is required to build the GNU C Library.
327 Older GCC versions and non-GNU compilers are still supported when
328 compiling programs that use the GNU C Library.
330 Security related changes:
332 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
333 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
334 has undefined behavior. On x32, the size_t argument may be passed
335 in the lower 32 bits of the 64-bit RDX register with non-zero upper
336 32 bits. When it happened with the sign bit of RDX register set,
337 memcmp gave the wrong result since it treated the size argument as
338 zero. Reported by H.J. Lu.
340 CVE-2019-9169: Attempted case-insensitive regular-expression match
341 via proceed_next_node in posix/regexec.c leads to heap-based buffer
342 over-read. Reported by Hongxu Chen.
344 The following bugs are resolved with this release:
346 [2872] locale: Transliteration Cyrillic -> ASCII fails
347 [6399] libc: gettid() should have a wrapper
348 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
349 [16976] glob: fnmatch unbounded stack VLA for collating symbols
350 [17396] localedata: globbing for locale by [[.collating-element.]]
351 [18035] dynamic-link: pldd does no longer work, enters infinite loop
352 [18465] malloc: memusagestat is built using system C library
353 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
354 invalid input drops valid char
355 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
356 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
357 [21897] localedata: Afar locales: Fix mon, abmon, and abday
358 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
359 [23352] malloc: __malloc_check_init still defined in public header
361 [23403] nptl: Wrong alignment of TLS variables
362 [23501] libc: nftw() doesn't return dangling symlink's inode
363 [23733] malloc: Check the count before calling tcache_get()
364 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
366 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
367 [23844] nptl: pthread_rwlock_trywrlock results in hang
368 [23983] argparse: Missing compat versions of argp_failure and argp_error
369 for long double = double
370 [23984] libc: Missing compat versions of err.h and error.h functions for
372 [23996] localedata: Dutch salutations
373 [24040] libc: riscv64: unterminated call chain in __thread_start
374 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
376 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
377 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
379 [24114] regex: regexec buffer read overrun in "grep -i
380 '\(\(\)*.\)*\(\)\(\)\1'"
381 [24122] libc: Segfaults if 0 returned from la_version
382 [24153] stdio: Some input functions do not react to stdin assignment
383 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
384 RDX is set) (CVE-2019-7309)
385 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
386 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
387 not the default "nor"
388 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
389 false positives, change to modern flexible array
390 [24180] nptl: pthread_mutex_trylock does not use the correct order of
391 instructions while maintaining the robust mutex list due to missing
393 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
394 unnecessary librt dependencies
395 [24200] localedata: Revert first_weekday removal in en_IE locale
396 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
397 [24215] nptl: pthread_timedjoin_np should be a cancellation point
398 [24216] malloc: Check for large bin list corruption when inserting
400 [24228] stdio: old x86 applications that use legacy libio crash on exit
401 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
403 [24293] localedata: Missing Minguo calendar support for TW locales
404 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
406 [24307] localedata: Update locale data to Unicode 12.0.0
407 [24323] dynamic-link: dlopen should not be able open PIE objects
408 [24335] build: "Obsolete types detected" with Linux 5.0 headers
409 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
411 [24370] localedata: Add lang_name for tt_RU locale
412 [24372] locale: Binary locale files are not architecture independent
413 [24394] time: strptime %Ey mis-parses final year of era
414 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
416 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
418 [24531] malloc: Malloc tunables give tcache assertion failures
419 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
421 [24535] localedata: Update locale data to Unicode 12.1.0
422 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
423 kernels and break testing
424 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
425 [24556] build: [GCC 9] error: â%sâ directive argument is null
426 [-Werror=format-overflow=]
427 [24570] libc: alpha: compat msgctl uses __IPC_64
428 [24584] locale: Data race in __wcsmbs_clone_conv
429 [24588] stdio: Remove codecvt vtables from libio
430 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
432 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
433 [24632] stdio: Old binaries which use freopen with default stdio handles
435 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
437 [24652] localedata: szl_PL spelling correction
438 [24695] nss: nss_db: calling getpwent after endpwent crashes
439 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
440 in /etc/nsswitch.conf
441 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
442 [24740] libc: getdents64 type confusion
443 [24741] dynamic-link: ld.so should not require that a versioned symbol is
444 always implemented in the same library
445 [24744] libc: Remove copy_file_range emulation
446 [24757] malloc: memusagestat is linked against system libpthread
447 [24794] libc: Partial test suite run builds corrupt test-in-container
455 * The getcpu wrapper function has been added, which returns the currently
456 used CPU and NUMA node. This function is Linux-specific.
458 * A new convenience target has been added for distribution maintainers
459 to build and install all locales as directories with files. The new
460 target is run by issuing the following command in your build tree:
461 'make localedata/install-locale-files', with an optional DESTDIR
462 to set the install root if you wish to install into a non-default
465 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
467 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
468 for _GNU_SOURCE, to match BSD environments.
470 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
471 indicates that it will abort the transaction prior to entering the kernel
472 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
473 suspended, and this caused some undefined side-effects issues by aborting
474 transactions manually. Glibc avoided it by abort transactions manually on
475 each syscall, but it lead to performance issues on newer kernels where the
476 HTM state is saved and restore lazily (the state being saved even when the
477 process actually does not use HTM).
479 * The functions posix_spawn_file_actions_addchdir_np and
480 posix_spawn_file_actions_addfchdir_np have been added, enabling
481 posix_spawn and posix_spawnp to run the new process in a different
482 directory. These functions are GNU extensions. The function
483 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
486 * The popen and system do not run atfork handlers anymore (BZ#17490).
487 Although it is a possible POSIX violation, the POSIX rationale in
488 pthread_atfork documentation regarding atfork handlers is to handle
489 inconsistent mutex state after a fork call in a multi-threaded process.
490 In both popen and system there is no direct access to user-defined mutexes.
492 * Support for the C-SKY ABIV2 running on Linux has been added. This port
493 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
495 - C-SKY ABIV2 soft-float little-endian
496 - C-SKY ABIV2 hard-float little-endian
498 * strftime's default formatting of a locale's alternative year (%Ey)
499 has been changed to zero-pad the year to a minimum of two digits,
500 like "%y". This improves the display of Japanese era years during
501 the first nine years of a new era, and is expected to be harmless
502 for all other locales (only Japanese locales regularly have
503 alternative year numbers less than 10). Zero-padding can be
504 overridden with the '_' or '-' flags (which are GNU extensions).
506 * As a GNU extension, the '_' and '-' flags can now be applied to
507 "%EY" to control how the year number is formatted; they have the
508 same effect that they would on "%Ey".
510 Deprecated and removed features, and other changes affecting compatibility:
512 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
513 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
515 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
516 in <sys/procfs.h>, has been corrected to match the type actually used by
517 the Linux kernel. This affects the size and layout of that structure on
518 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
520 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
521 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
522 defined in <sys/procfs.h>, has been corrected to match the type actually
523 used by the Linux kernel. This affects the size and layout of those
526 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
527 meant to scan a string and allocate space for it with malloc, is now
528 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
529 defined. This extension conflicts with C99's use of '%a' to scan a
530 hexadecimal floating-point number, which is now available to programs
531 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
533 POSIX.1-2008 includes the feature of allocating a buffer for string input
534 with malloc, using the modifier letter 'm' instead. Programs using
535 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
536 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
537 C99 '%a' no longer need to avoid _GNU_SOURCE.
539 GCC's -Wformat warnings can detect most uses of this extension, as long
540 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
541 __attribute__ ((format (scanf, ...))).
543 Changes to build and runtime requirements:
545 * Python 3.4 or later is required to build the GNU C Library.
547 * On most architectures, GCC 5 or later is required to build the GNU C
548 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
550 Older GCC versions and non-GNU compilers are still supported when
551 compiling programs that use the GNU C Library.
553 Security related changes:
555 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
556 denial of service due to resource exhaustion when processing getaddrinfo
557 calls with crafted host names. Reported by Guido Vranken.
559 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
560 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
561 happened, accessing the 32-bit size_t value as the full 64-bit register
562 in the assembly string/memory functions would cause a buffer overflow.
565 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
566 addresses with arbitrary trailing characters, potentially leading to data
567 or command injection issues in applications.
569 The following bugs are resolved with this release:
571 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
572 [10496] localedata: 12h time representation in multiple locales faulty
573 [10797] localedata: it_IT locale numeric does not have a separator for
575 [11319] libc: dprintf doesn't handle errors properly
576 [16346] time: mktime: potentially unsafe use of localtime_offset
577 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
579 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
580 posix_spawn_file_actions_addfchdir_np
581 [17426] localedata: Indian locales: set the correct date format
582 [17490] stdio: popen should not invoke atfork handlers
583 [17783] libc: TIOCSER_TEMT conditions inconsistent
584 [18040] regex: use-after-free in regexec/get_subexp
585 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
586 [20018] network: getaddrinfo should reject IP addresses with trailing
587 characters (CVE-2016-10739)
588 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
589 [20271] libc: Missing "\n" in __libc_fatal calls
590 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
591 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
592 pointer argument is non-NULL
593 [21037] stdio: open_memstream and freopen
594 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
595 [21716] time: Crash in glibc's mktime in low-memory situations
596 [22834] stdio: Subprocess forked by popen may crash in Linux when
597 multithreads call popen
598 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
599 and pthread_create fails.
600 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
601 [23125] libc: riscv64: endless loop when throwing an exception from a
603 [23275] nptl: Race in pthread_mutex_lock while promoting to
604 PTHREAD_MUTEX_ELISION_NP.
605 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
607 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
609 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
611 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
612 [23509] dynamic-link: CET enabled glibc is incompatible with the older
614 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
615 [23521] nss: get_next_alias nss_files file stream leak
616 [23538] nptl: Hang in pthread_cond_broadcast
617 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
618 [23578] regex: Invalid memory access if regex pattern contains NUL byte
619 [23579] libc: Errors misreported in preadv2
620 [23597] build: support/test-container.c doesn't work with different
622 [23603] time: mktime signed integer overflow on large timestamps
623 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
624 [23614] libc: powerpc: missing CFI register information in __mpn_*
626 [23637] string: Generic strstr/strcasestr fails with huge needles
627 [23640] libc: no way to easily clear FD_CLOEXEC in
628 posix_spawn_file_actions_adddup2()
629 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
631 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
633 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
634 [23689] libc: Bug in documentation for rusage.ru_ixrss in
635 bits/types/struct_rusage.h
636 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
638 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
640 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
641 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
642 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
644 [23724] localedata: Albanian date formats are incorrect
645 [23735] math: libnldbl_nonshared.a references internal libm symbols
646 [23740] localedata: kl_GL: Month names and date formats need update
647 [23744] regex: regex refactorings to remove BE, avoid duplication
648 [23745] time: mktime fix for Gnulib + coreutils
649 [23758] time: Improve the width of alternate representation for year in
651 [23783] libc: [mips] Missing CMSPAR bits/termios.h
652 [23789] time: mktime does not set errno on failure
653 [23791] localedata: Wrong monetary format for ca_ES locale
654 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
655 [23794] locale: c16rtomb does not handle surrogate pairs
656 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
657 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
658 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
659 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
660 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
661 [23862] libc: [sh] missing kernel-features.h undefines
662 [23864] libc: [riscv] missing kernel-features.h undefines
663 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
664 [23907] malloc: Incorrect double-free malloc tcache check disregards
666 [23913] libc: off-by-one in function maybe_script_execute in
667 sysdeps/posix/spawni.c
668 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
669 [23923] locale: Add --no-hard-links option to localedef
670 [23927] network: Linux if_nametoindex() does not close descriptor
672 [23961] math: powf can overflow to inf without setting errno in non-
673 nearest rounding mode
674 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
675 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
676 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
677 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
678 [24011] localedata: Fixed small type in comment for locale bs_BA
679 [24018] libc: gettext() may return NULL
680 [24022] build: riscv build failure with Linux kernel 4.20-rc7
681 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
682 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
684 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
685 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
687 [24046] localedata: en_US locale doesn't define date_fmt
688 [24063] manual: @var{errno} should be @code{errno}
689 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
690 [24088] libc: VSCR field is not being correctly read in ucontext_t on
692 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
694 [24097] string: Can't use 64-bit register for size_t in assembly codes for
696 [24110] hurd: SS_DISABLE never set in stack_t value returned by
698 [24112] network: Do not send DNS queries for non-host names (where all
699 answers will be rejected)
700 [24130] libc: alpha __remqu corrupts $f3 register
707 * The localization data for ISO 14651 is updated to match the 2016
708 Edition 4 release of the standard, this matches data provided by
709 Unicode 9.0.0. This update introduces significant improvements to the
710 collation of Unicode characters. This release deviates slightly from
711 the standard in that the collation element ordering for lowercase and
712 uppercase LATIN script characters is adjusted to ensure that regular
713 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
714 is not matched by [a-z]. With the update many locales have been
715 updated to take advantage of the new collation information. The new
716 collation information has increased the size of the compiled locale
717 archive or binary locales.
719 * The GNU C Library can now be compiled with support for Intel CET, AKA
720 Intel Control-flow Enforcement Technology. When the library is built
721 with --enable-cet, the resulting glibc is protected with indirect
722 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
723 compatible with all existing executables and shared libraries. This
724 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
725 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
726 capable of multi-byte NOPs, like x86-64 processors as well as Intel
727 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
728 x86_64 and x32 on non-CET processors. --enable-cet has been tested
729 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
732 * The GNU C Library now has correct support for ABSOLUTE symbols
733 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
734 relocated incorrectly or in some cases discarded. The GNU linker can
735 make use of the newer semantics, but it must communicate it to the
736 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
737 field) to indicate such support is required.
739 * Unicode 11.0.0 Support: Character encoding, character type info, and
740 transliteration tables are all updated to Unicode 11.0.0, using
741 generator scripts contributed by Mike FABIAN (Red Hat).
743 * <math.h> functions that round their results to a narrower type are added
744 from TS 18661-1:2014 and TS 18661-3:2015:
746 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
749 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
752 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
755 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
758 * Two grammatical forms of month names are now supported for the following
759 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
760 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
761 support two grammatical forms in abbreviated month names: Catalan, Greek,
764 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
765 include the support for two grammatical forms of month names.
767 * Building and running on GNU/Hurd systems now works without out-of-tree
770 * The renameat2 function has been added, a variant of the renameat function
771 which has a flags argument. If the flags are zero, the renameat2 function
772 acts like renameat. If the flag is not zero and there is no kernel
773 support for renameat2, the function will fail with an errno value of
774 EINVAL. This is different from the existing gnulib function renameatu,
775 which performs a plain rename operation in case of a RENAME_NOREPLACE
776 flags and a non-existing destination (and therefore has a race condition
777 that can clobber the destination inadvertently).
779 * The statx function has been added, a variant of the fstatat64
780 function with an additional flags argument. If there is no direct
781 kernel support for statx, glibc provides basic stat support based on
782 the fstatat64 function.
784 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
785 library if installed. libidn2 version 2.0.5 or later is recommended. If
786 libidn2 is not available, internationalized domain names are not encoded
787 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
788 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
789 with an encoding error.) Flags which used to change the IDN encoding and
790 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
791 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
792 deprecated. They no longer have any effect.
794 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
795 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
796 range of ELF gABI expressions including such constructs as
797 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
798 have been further restricted, and where in the past a dynamic string
799 token sequence may have been interpreted as a literal string it will
800 now cause a load failure. These load failures were always considered
801 unspecified behaviour from the perspective of the dynamic loader, and
802 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
803 results in a load failure now.
805 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
806 implementation includes all the standard functions provided by
809 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
810 thrd_detach, thrd_exit, and thrd_join for thread management.
812 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
813 mtx_destroy for mutual exclusion.
815 - call_once for function call synchronization.
817 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
818 cnd_wait for conditional variables.
820 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
822 Application developers must link against libpthread to use ISO C threads.
824 Deprecated and removed features, and other changes affecting compatibility:
826 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
827 installed. Software that was using either header should be updated to
828 use standard <stdio.h> interfaces instead.
830 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
831 This was never required by the C standard, and the macros just expanded
832 to call alternative names for the same functions. If you hoped getc and
833 putc would provide performance improvements over fgetc and fputc, instead
834 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
835 necessary, flockfile and funlockfile.
837 * All stdio functions now treat end-of-file as a sticky condition. If you
838 read from a file until EOF, and then the file is enlarged by another
839 process, you must call clearerr or another function with the same effect
840 (e.g. fseek, rewind) before you can read the additional data. This
841 corrects a longstanding C99 conformance bug. It is most likely to affect
842 programs that use stdio to read interactive input from a terminal.
845 * The macros 'major', 'minor', and 'makedev' are now only available from
846 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
847 headers that happen to include <sys/types.h>. These macros are rarely
848 used, not part of POSIX nor XSI, and their names frequently collide with
849 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
852 <sys/sysmacros.h> is a GNU extension. Portable programs that require
853 these macros should first include <sys/types.h>, and then include
854 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
856 * The tilegx*-*-linux-gnu configurations are no longer supported.
858 * The obsolete function ustat is no longer available to newly linked
859 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
860 function has been deprecated in favor of fstatfs and statfs.
862 * The obsolete function nfsservctl is no longer available to newly linked
863 binaries. This function was specific to systems using the Linux kernel
864 and could not usefully be used with the GNU C Library on systems with
865 version 3.1 or later of the Linux kernel.
867 * The obsolete function name llseek is no longer available to newly linked
868 binaries. This function was specific to systems using the Linux kernel
869 and was not declared in a header. Programs should use the lseek64 name
870 for this function instead.
872 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
873 getaddrinfo and getnameinfo functions have been deprecated. The behavior
874 previously selected by them is now always enabled.
876 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
877 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
878 restriction (rejecting '_' in host names, among other things) has been
879 removed, for increased compatibility with non-IDN name resolution.
881 * The fcntl function now have a Long File Support variant named fcntl64. It
882 is added to fix some Linux Open File Description (OFD) locks usage on non
883 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
884 fcntl and LFS support is handled transparently. Also for Linux, the OFD
885 locks act as a cancellation entrypoint.
887 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
888 ecb_crypt, and des_setparity are no longer available to newly linked
889 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
890 longer installed. These functions encrypted and decrypted data with the
891 DES block cipher, which is no longer considered secure. Software that
892 still uses these functions should switch to a modern cryptography library,
895 * Reflecting the removal of the encrypt and setkey functions above, the
896 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
897 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
900 * The obsolete function fcrypt is no longer available to newly linked
901 binaries. It was just another name for the standard function crypt,
902 and it has not appeared in any header file in many years.
904 * We have tentative plans to hand off maintenance of the passphrase-hashing
905 library, libcrypt, to a separate development project that will, we hope,
906 keep up better with new passphrase-hashing algorithms. We will continue
907 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
908 'crypt_r' should not need to change at all; however, distributions will
909 need to install <crypt.h> and libcrypt from a separate project.
911 In this release, if the configure option --disable-crypt is used, glibc
912 will not install <crypt.h> or libcrypt, making room for the separate
913 project's versions of these files. The plan is to make this the default
914 behavior in a future release.
916 Changes to build and runtime requirements:
918 GNU make 4.0 or later is now required to build glibc.
920 Security related changes:
922 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
923 been fixed by removing the glibc-internal IDNA implementation and using
924 the system-provided libidn2 library instead. Originally reported by Hanno
925 Böck and Christian Weisgerber.
927 CVE-2017-18269: An SSE2-based memmove implementation for the i386
928 architecture could corrupt memory. Reported by Max Horn.
930 CVE-2018-11236: Very long pathname arguments to realpath function could
931 result in an integer overflow and buffer overflow. Reported by Alexey
934 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
935 architecture could write beyond the target buffer, resulting in a buffer
936 overflow. Reported by Andreas Schwab.
938 The following bugs are resolved with this release:
940 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
941 [6889] manual: 'PWD' mentioned but not specified
942 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
943 when __WORDSIZE != 64
944 [13762] regex: re_search etc. should return -2 on memory exhaustion
945 [13888] build: /tmp usage during testing
946 [13932] math: dbl-64 pow unexpectedly slow for some inputs
947 [14092] nptl: Support C11 threads
948 [14095] localedata: Review / update collation data from Unicode / ISO
950 [14508] libc: -Wformat warnings
951 [14553] libc: Namespace pollution loff_t in sys/types.h
952 [14890] libc: Make NT_PRFPREG canonical.
953 [15105] libc: Extra PLT references with -Os
954 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
956 [16335] manual: Feature test macro documentation incomplete and out of
958 [16552] libc: Unify umount implementations in terms of umount2
959 [17082] libc: htons et al.: statement-expressions prevent use on global
960 scope with -O1 and higher
961 [17343] libc: Signed integer overflow in /stdlib/random_r.c
962 [17438] localedata: pt_BR: wrong d_fmt delimiter
963 [17662] libc: please implement binding for the new renameat2 syscall
964 [17721] libc: __restrict defined as /* Ignore */ even in c11
965 [17979] libc: inconsistency between uchar.h and stdint.h
966 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
967 [18023] libc: extend_alloca is broken (questionable pointer comparison,
968 horrible machine code)
969 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
971 [18471] libc: llseek should be a compat symbol
972 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
974 [18991] nss: nss_files skips large entry in database
975 [19239] libc: Including stdlib.h ends up with macros major and minor being
977 [19463] libc: linknamespace failures when compiled with -Os
978 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
979 [19527] locale: Normalized charset name not recognized by setlocale
980 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
981 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
983 [19728] network: out of bounds stack read in libidn function
984 idna_to_ascii_4i (CVE-2016-6261)
985 [19729] network: out of bounds heap read on invalid utf-8 inputs in
986 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
987 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
989 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
990 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
991 [20419] dynamic-link: files with large allocated notes crash in
993 [20530] libc: bswap_16 should use __builtin_bswap16() when available
994 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
995 [20980] manual: CFLAGS environment variable replaces vital options
996 [21163] regex: Assertion failure in pop_fail_stack when executing a
997 malformed regexp (CVE-2015-8985)
998 [21234] manual: use of CFLAGS makes glibc detect no optimization
999 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
1000 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
1001 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
1002 [21508] locale: intl/tst-gettext failure with latest msgfmt
1003 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
1004 [21812] network: getifaddrs() returns entries with ifa_name == NULL
1005 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
1007 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
1009 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
1010 [22247] network: Integer overflow in the decode_digit function in
1011 puny_decode.c in libidn (CVE-2017-14062)
1012 [22342] nscd: NSCD not properly caching netgroup
1013 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
1014 [22550] localedata: es_ES locale (and other es_* locales): collation
1015 should treat ñ as a primary different character, sync the collation
1016 for Spanish with CLDR
1017 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
1018 by gcc configured with --enable-default-pie
1019 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
1020 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
1021 crossing 2GB threshold (CVE-2017-18269)
1022 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
1024 [22735] time: Misleading typo in time.h source comment regarding
1026 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
1027 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
1028 `__assert_perror_fail ()' to `__assert_fail_base ()'
1029 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
1031 [22786] libc: Stack buffer overflow in realpath() if input size is close
1032 to SSIZE_MAX (CVE-2018-11236)
1033 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
1034 through an absolute DT_NEEDED path
1035 [22792] build: tcb-offsets.h dependency dropped
1036 [22797] libc: pkey_get() uses non-reserved name of argument
1037 [22807] libc: PTRACE_* constants missing for powerpc
1038 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
1039 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
1040 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
1041 [22848] localedata: ca_ES: update date definitions from CLDR
1042 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
1043 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
1044 [22896] localedata: Update locale data for an_ES
1045 [22902] math: float128 test failures with GCC 8
1046 [22918] libc: multiple common of `__nss_shadow_database'
1047 [22919] libc: sparc32: backtrace yields infinite backtrace with
1049 [22926] libc: FTBFS on powerpcspe
1050 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
1052 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
1053 [22947] libc: FAIL: misc/tst-preadvwritev2
1054 [22963] localedata: cs_CZ: Add alternative month names
1055 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
1056 [22996] localedata: change LC_PAPER to en_US in es_BO locale
1057 [22998] dynamic-link: execstack tests are disabled when SELinux is
1059 [23005] network: Crash in __res_context_send after memory allocation
1061 [23007] math: strtod cannot handle -nan
1062 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
1063 [23036] regex: regex equivalence class regression
1064 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
1065 [23069] libc: sigaction broken on riscv64-linux-gnu
1066 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
1067 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
1068 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
1069 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
1070 and libc build with -Os)
1071 [23140] localedata: More languages need two forms of month names
1072 [23145] libc: _init/_fini aren't marked as hidden
1073 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
1074 [23171] math: C++ iseqsig for long double converts arguments to double
1075 [23178] nscd: sudo will fail when it is run in concurrent with commands
1076 that changes /etc/passwd
1077 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
1079 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
1080 [23208] localedata: New locale - Lower Sorbian (dsb)
1081 [23233] regex: Memory leak in build_charclass_op function in file
1083 [23236] stdio: Harden function pointers in _IO_str_fields
1084 [23250] nptl: Offset of __private_ss differs from GCC
1085 [23253] math: tgamma test suite failures on i686 with -march=x86-64
1086 -mtune=generic -mfpmath=sse
1087 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
1089 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
1090 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
1092 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
1093 [23277] math: nan function should not have const attribute
1094 [23279] math: scanf and strtod wrong for some hex floating-point
1095 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
1097 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
1098 [23303] build: undefined reference to symbol
1099 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
1100 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
1102 [23313] stdio: libio vtables validation and standard file object
1104 [23329] libc: The __libc_freeres infrastructure is not properly run across
1106 [23349] libc: Various glibc headers no longer compatible with
1108 [23351] malloc: Remove unused code related to heap dumps and malloc
1110 [23363] stdio: stdio-common/tst-printf.c has non-free license
1111 [23396] regex: Regex equivalence regression in single-byte locales
1112 [23422] localedata: oc_FR: More updates of locale data
1113 [23442] build: New warning with GCC 8
1114 [23448] libc: Out of bounds access in IBM-1390 converter
1115 [23456] libc: Wrong index_cpu_LZCNT
1116 [23458] build: tst-get-cpu-features-static isn't added to tests
1117 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
1119 [23467] dynamic-link: x86/CET: A property note parser bug
1126 * The GNU C Library can now be compiled with support for building static
1127 PIE executables (See --enable-static-pie in INSTALL). These static PIE
1128 executables are like static executables but can be loaded at any address
1129 and provide additional security hardening benefits at the cost of some
1130 memory and performance. When the library is built with --enable-static-pie
1131 the resulting libc.a is usable with GCC 8 and above to create static PIE
1132 executables using the GCC option '-static-pie'. This feature is currently
1133 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
1134 aarch64 with binutils 2.30 or later.
1136 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
1137 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
1140 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1142 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1144 * In order to support faster and safer process termination the malloc API
1145 family of functions will no longer print a failure address and stack
1146 backtrace after detecting heap corruption. The goal is to minimize the
1147 amount of work done after corruption is detected and to avoid potential
1148 security issues in continued process execution. Reducing shutdown time
1149 leads to lower overall process restart latency, so there is benefit both
1150 from a security and performance perspective.
1152 * The abort function terminates the process immediately, without flushing
1153 stdio streams. Previous glibc versions used to flush streams, resulting
1154 in deadlocks and further data corruption. This change also affects
1155 process aborts as the result of assertion failures.
1157 * On platforms where long double has the IEEE binary128 format (aarch64,
1158 alpha, mips64, riscv, s390 and sparc), the math library now implements
1159 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1160 These are the same interfaces added in version 2.26 for some platforms where
1161 this format is supported but is not the format of long double.
1163 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1164 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1165 implements interfaces for that type, as defined by ISO/IEC TS
1166 18661-3:2015. These are corresponding interfaces to those supported for
1169 * The math library now implements interfaces for the _Float32, _Float64 and
1170 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1171 corresponding interfaces to those supported for _Float128.
1173 * glibc now implements the memfd_create and mlock2 functions on Linux.
1175 * Support for memory protection keys was added. The <sys/mman.h> header now
1176 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1179 * The copy_file_range function was added.
1181 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1183 * The ldconfig utility now processes `include' directives using the C/POSIX
1184 collation ordering. Previous glibc versions used locale-specific
1185 ordering, the change might break systems that relied on that.
1187 * Support for two grammatical forms of month names has been added.
1188 In a call to strftime, the "%B" and "%b" format specifiers will now
1189 produce the grammatical form required when the month is used as part
1190 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1191 required when the month is named by itself. For instance, in Greek
1192 and in many Slavic and Baltic languages, "%B" will produce the month
1193 in genitive case, and "%OB" will produce the month in nominative case.
1195 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1196 are all valid and will all accept any known form of month
1197 name---standalone or complete, abbreviated or full. In a call to
1198 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1199 the strings used by "%B" and "%b", respectively. New query
1200 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1201 used by "%OB" and "%Ob", respectively.
1203 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1204 define the strings for %OB and %Ob, respectively; these have the
1205 same syntax as "mon" and "abmon". These arrays are optional; if they
1206 are not provided then they have the same content as "mon" and "abmon",
1209 These features are provided for locales which define "alt_mon" and/or
1210 "ab_alt_mon" in their locale source data. This release includes such
1211 alternative month name data for the following languages: Belarusian,
1212 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1214 This feature is currently a GNU extension, but it is expected to
1215 be added to the next revision of POSIX, and it is also already
1216 available on some BSD-derived operating systems.
1218 This feature will cause existing statically compiled applications
1219 to fail to load locales and fall back to the builtin C/POSIX locales.
1220 See notes below for other changes affecting compatibility.
1222 * Support for the RISC-V ISA running on Linux has been added. This port
1223 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1224 for the following ISA and ABI pairs:
1230 Deprecated and removed features, and other changes affecting compatibility:
1232 * Statically compiled applications attempting to load locales compiled for the
1233 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1234 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1235 support for two grammatical forms of the month names, also extends the locale
1236 data binary format. Static applications needing locale support must be
1237 recompiled to match the runtime and data they are deployed with. In some
1238 distributions there is an upgrade window where dynamically linked applications
1239 may use a new library but the old locale data and also fall back to the
1240 builtin C/POSIX locales; restarting the application process is sufficient to
1243 * Support for statically linked applications which call dlopen is deprecated
1244 and will be removed in a future version of glibc. Applications which call
1245 dlopen need to be linked dynamically instead.
1247 * Support for old programs which use internal stdio data structures and
1248 functions is deprecated. This includes programs which use the C++ streams
1249 provided by libstdc++ in GCC 2.95. Programs which use the internal
1250 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1251 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1252 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1253 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1254 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1255 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1256 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1257 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1258 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1259 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1260 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1261 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1262 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1263 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1264 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1265 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1266 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1267 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1268 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1269 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1270 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1271 future version of glibc. Unlike other symbol removals, these old
1272 applications will not be supported using compatibility symbols.
1274 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1275 defined by <sys/ptrace.h>.
1277 * libm no longer supports SVID error handling (calling a user-provided
1278 matherr function on error) or the _LIB_VERSION variable to control error
1279 handling. (SVID error handling and the _LIB_VERSION variable still work
1280 for binaries linked against older versions of the GNU C Library.) The
1281 libieee.a library is no longer provided. math.h no longer defines struct
1282 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1283 TLOSS, PLOSS and HUGE.
1285 * The libm functions pow10, pow10f and pow10l are no longer supported for
1286 new programs. Programs should use the standard names exp10, exp10f and
1287 exp10l for these functions instead.
1289 * The mcontext_t type is no longer the same as struct sigcontext. On
1290 platforms where it was previously the same, this changes the C++ name
1291 mangling for interfaces involving this type.
1293 * The add-ons mechanism for building additional packages at the same time as
1294 glibc has been removed. The --enable-add-ons configure option is now
1297 * The --without-fp configure option is now ignored. Whether hardware
1298 floating-point instructions are used is now configured based on whether
1299 the compiler used at configure time (without any options implied by a
1300 --with-cpu= configure option) uses such instructions.
1302 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1303 the specified string can be parsed as a domain name.
1305 * In the malloc_info output, the <heap> element may contain another <aspace>
1306 element, "subheaps", which contains the number of sub-heaps.
1308 * The libresolv function p_secstodate is no longer supported for new
1311 * The tilepro-*-linux-gnu configuration is no longer supported.
1313 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1314 and will be removed in a future release. Software that is still using
1315 either header should be updated to use standard <stdio.h> interfaces
1318 libio.h was originally the header for a set of supported GNU extensions,
1319 but they have not been maintained as such in many years, they are now
1320 standing in the way of improvements to stdio, and we don't think there are
1321 any remaining external users. _G_config.h was never intended for public
1322 use, but predates the bits convention.
1324 Changes to build and runtime requirements:
1326 * bison version 2.7 or later is required to generate code in the 'intl'
1329 Security related changes:
1331 CVE-2009-5064: The ldd script would sometimes run the program under
1332 examination directly, without preventing code execution through the
1333 dynamic linker. (The glibc project disputes that this is a security
1334 vulnerability; only trusted binaries must be examined using the ldd
1337 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1338 suffered from a one-byte overflow during ~ operator processing (either
1339 on the stack or the heap, depending on the length of the user name).
1340 Reported by Tim RĂŒhsen.
1342 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1343 would sometimes fail to free memory allocated during ~ operator
1344 processing, leading to a memory leak and, potentially, to a denial
1347 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1348 without GLOB_NOESCAPE, could write past the end of a buffer while
1349 unescaping user names. Reported by Tim RĂŒhsen.
1351 CVE-2017-17426: The malloc function, when called with an object size near
1352 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1353 instead of NULL. This was a regression introduced with the new malloc
1354 thread cache in glibc 2.26. Reported by Iain Buclaw.
1356 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1357 to the allocation of too much memory. (This is not a security bug per se,
1358 it is mentioned here only because of the CVE assignment.) Reported by
1361 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1362 of the number of search path components. (This is not a security
1363 vulnerability per se because no trust boundary is crossed if the fix for
1364 CVE-2017-1000366 has been applied, but it is mentioned here only because
1365 of the CVE assignment.) Reported by Qualys.
1367 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1368 for AT_SECURE or SUID binaries could be used to load libraries from the
1371 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1372 succeeds without returning an absolute path due to unexpected behaviour
1373 of the Linux kernel getcwd syscall. Reported by halfdog.
1375 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1376 an object size near the value of SIZE_MAX, would return a pointer to a
1377 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1379 CVE-2018-6551: The malloc function, when called with an object size near
1380 the value of SIZE_MAX, would return a pointer to a buffer which is too
1381 small, instead of NULL.
1383 The following bugs are resolved with this release:
1385 [866] glob: glob should match dangling symlinks
1386 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1387 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1389 [5997] math: Very slow execution of sinf function
1390 [10580] localedata: hr_HR: updated locale
1391 [10871] locale: 'mon' array should contain both nominative and genitive
1393 [12349] localedata: eu_ES: incorrect thousands separator
1394 [13605] localedata: shn_MM: new Shan locale
1395 [13805] localedata: ru_RU: currency should use ',' as radix point
1396 [13953] localedata: km_KH: locale update
1397 [13994] localedata: mjw_IN: new locale
1398 [14121] build: make writes .mo files in po directory
1399 [14333] libc: Fix the race between atexit() and exit()
1400 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1401 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1403 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1404 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1405 width Latin characters
1406 [15332] localedata: es_CU: locale update
1407 [15436] stdio: Don't close or flush stdio streams on abort
1408 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1410 [16148] localedata: ca_ES: incorrect thousands separator
1411 [16750] dynamic-link: ldd should not try to execute the binaries
1413 [16777] localedata: pl_PL: incorrect thousands separator in locale
1414 [16905] localedata: hanzi: new collation
1415 [17563] localedata: cmn_TW: add hanzi collation
1416 [17750] localedata: wrong collation order of diacritics in most locales
1417 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1419 [17956] build: Build fails on missing definitions from header file
1420 nss/nss.h when Mozilla NSS is used for cryptography
1421 [18203] libc: realpath() does not handle unreachable paths correctly
1422 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1423 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1424 [18822] libc: Internal functions are called via PLT
1425 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1426 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1427 [19574] libc: glibc should support building static PIE binaries
1428 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1430 [19971] glob: glob: Do not skip entries with zero d_ino values
1431 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1432 [20008] localedata: km_KH: convert to translit_neutral
1433 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1434 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1435 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1436 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1437 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1439 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1440 they're set, wrong errors returned by gaih_inet when lookup functions
1442 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1443 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1445 [20952] localedata: yuw_PG: new locale
1446 [21084] localedata: charmaps/IBM858: new codepage
1447 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1448 [21242] libc: assert gives pedantic warning in old gcc versions
1449 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1450 __regcall calling convention
1451 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1452 [21326] libc: C99 functions are not declared for C++11 and later if
1453 _GNU_SOURCE is not predefined by g++
1454 [21457] libc: sys/ucontext.h namespace
1455 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1456 [21660] math: GCC fails to compile a formula with tgmath.h
1457 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1458 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1459 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1460 [21684] math: tgmath.h handling of complex integers
1461 [21685] math: tgmath.h handling of bit-fields
1462 [21686] math: tgmath.h handling of __int128
1463 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1465 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1467 [21750] localedata: column width of characters incompatible with classical
1469 [21754] malloc: malloc: Perform as little work as possible after heap
1470 consistency check failures
1471 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1472 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1473 [21791] string: Unused XXX_chk_XXX functions in libc.a
1474 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1476 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1478 [21845] localedata: Added new Locale bho_NP
1479 [21853] localedata: Fix abday Which looks same as day in zh_SG
1480 [21854] localedata: Added New Locale en_SC
1481 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1482 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1483 _dl_runtime_resolve_avx_slow
1484 [21885] network: getaddrinfo: gethosts does not release resolver context
1485 on memory allocation failure
1486 [21899] libc: XPG4.2 sigaction namespace
1487 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1489 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1491 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1492 errno value, causing getaddrinfo to fail
1493 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1494 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1495 instead of EAI_NODATA
1496 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1497 constant PTRACE_SEIZE_DEVEL
1498 [21930] math: C-only gcc builtins used in <math.h> isinf
1499 [21932] network: Unpaired __resolv_context_get in generic get*_r
1501 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1502 [21944] libc: sigval namespace
1503 [21951] localedata: Update hanzi collation by stroke
1504 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1505 sysdeps/x86_64/fpu/e_expf.S
1506 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1507 allocation in syscall loops)
1508 [21959] localedata: Fix Country name for xh_ZA
1509 [21960] localedata: Fix abmon for bem_ZM
1510 [21966] math: AVX2 mathvec functions use FMA without checking
1511 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1512 [21971] localedata: Added New Locale for mfe_MU
1513 [21972] libc: assert macro requires operator== (int) for its argument type
1514 [21973] math: [sparc] libm missing sqrtl compat symbol
1515 [21974] libc: Remove __bb_init_func and __bb_exit_func
1516 [21982] string: stratcliff.c: error: assuming signed overflow does not
1518 [21986] stdio: __guess_grouping is called incorrectly
1519 [21987] math: [sparc32] wrong bits/long-double.h installed
1520 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1522 [22022] localedata: Missing country_name for mni_IN
1523 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1525 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1527 [22026] locale: iconv_open: heap overflow on gconv_init failure
1528 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1529 [22035] math: [m68k] bits/math-inline.h macro namespace
1530 [22038] localedata: Fix abbreviated weeks and months for Somali
1531 [22044] localedata: Remove redundant data for Limburgish Language
1532 [22050] malloc: Linking with -lmcheck does not hook
1533 __malloc_initialize_hook correctly
1534 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1535 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1536 [22070] localedata: charmaps/UTF-8: wcwidth for
1537 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1538 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1539 Jungseong and Jongseong) should be 0
1540 [22078] nss: nss_files performance issue in multi mode
1541 [22082] math: bits/math-finite.h exp10 condition
1542 [22086] libc: pcprofiledump incorrect cross-endian condition
1543 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1544 [22095] network: Name server address allocation memory leak in resolv.conf
1546 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1548 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1549 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1551 [22111] malloc: malloc: per thread cache is not returned when thread exits
1552 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1553 [22134] libc: [linux] implement fexecve with execveat
1554 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1556 [22145] libc: ttyname() gives up too early in the face of namespaces
1557 [22146] math: C++ build issue with float128 on x86_64
1558 [22153] nptl: nptl: save error code before process termination
1559 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1560 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1561 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1562 [22165] libc: [hppa] Text relocations in libc.so
1563 [22180] libc: destructor registered via __cxa_atexit is called twice
1564 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1565 symlinks") cause "make" segfaults
1566 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1568 [22207] libc: FAIL: stdlib/test-atexit-race
1569 [22225] math: nearbyint arithmetic moved before feholdexcept
1570 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1571 [22235] math: iscanonical in C++ and float128
1572 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1573 the svid compat wrapper
1574 [22244] math: ynf and yn are wrong without the svid compat wrapper
1575 [22273] libc: Improper assert in Linux posix_spawn implementation
1576 [22284] libc: -pg -pie doesn't work
1577 [22292] locale: localedef exits with error 4 when it should be error 1
1578 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1579 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1581 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1582 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1584 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1585 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1586 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1587 [22322] libc: [mips64] wrong bits/long-double.h installed
1588 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1589 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1591 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1592 [22343] malloc: Integer overflow in posix_memalign
1593 [22347] libc: getrandom() returns the number of bytes that were copied to
1594 the buffer even though the comments say "Return 0 on success and -1 on
1596 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1597 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1599 [22370] dynamic-link: Incorrect note padding check
1600 [22375] libc: malloc returns pointer from tcache_get when should return
1601 NULL (CVE-2017-17426)
1602 [22377] math: iseqsig, float128 and C++
1603 [22382] localedata: Error in tpi_PG locale
1604 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1605 inside the ASCII printable range
1606 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1608 [22403] localedata: Slash needs escaping in some locales
1609 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1610 [22409] network: res_hnok does not accept some host names used on the
1612 [22412] network: res_dnok, res_hnok should perform syntax checks
1613 [22413] network: ns_name_pton ignores syntactically invalid trailing
1615 [22415] stdio: setvbuf can lead to invalid free/segfault
1616 [22432] build: Non-deterministic build
1617 [22439] malloc: malloc_info should compute summary statistics for all sub-
1619 [22442] network: if_nametoindex could report index for the wrong
1620 networking interface
1621 [22446] build: aliasing violation calling readlink in handle_request
1622 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1623 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1624 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1625 __nscd_hash/__nss_hash
1626 [22463] network: p_secstodate overflow handling
1627 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1628 [22478] libc: sigwait can fail with EINTR
1629 [22505] libc: ldconfig processes include directive in locale-specific
1631 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1632 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1633 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1634 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1635 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1636 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1637 same as for Croatian
1638 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1639 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1640 [22577] libc: missing newline after "cannot allocate TLS data structures
1642 [22588] manual: manual/conf.texi: missing underscore in front of
1644 [22593] math: nextafter and nexttoward are declared with const attribute
1645 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1646 [22603] string: ia64 memchr overflows internal pointer check
1647 [22605] libc: SH clone does not set the exit code correctly
1648 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1650 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1651 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1652 modified in case of success
1653 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1654 [22615] manual: manual: ambiguous wording about errno value in case of
1656 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1658 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1659 binaries or if /proc is not mounted (CVE-2017-16997)
1660 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1661 [22630] build: $(no-pie-ldflag) is no longer effective
1662 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1663 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1664 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1665 [22637] nptl: guard size is subtracted from thread stack size instead of
1667 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1668 [22657] localedata: hu_HU: Avoid double space in date
1669 [22660] math: fmax, fmin sNaN handling on alpha
1670 [22664] libc: New warning of GCC8
1671 [22665] math: alpha: ceil and floor raise inexact exceptions
1672 [22666] math: alpha: trunc raise inexact exceptions
1673 [22667] libc: makecontext lacks stack alignment on i386
1674 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1675 [22679] libc: getcwd(3) can succeed without returning an absolute path
1677 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1678 elision and tunables
1679 [22687] math: [powerpc-nofpu] complex long double functions spurious
1681 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1682 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1683 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1685 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1686 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1688 [22701] nis: Incomplete removal of libnsl
1689 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1690 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1691 [22715] dynamic-link: FAIL: elf/tst-audit10
1692 [22719] libc: Backtrace tests fail on hppa
1693 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1694 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1695 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1696 before the first call to crypt_r () in crypt/badsalttest.c
1703 * A per-thread cache has been added to malloc. Access to the cache requires
1704 no locks and therefore significantly accelerates the fast path to allocate
1705 and free small amounts of memory. Refilling an empty cache requires locking
1706 the underlying arena. Performance measurements show significant gains in a
1707 wide variety of user workloads. Workloads were captured using a special
1708 instrumented malloc and analyzed with a malloc simulator. Contributed by
1709 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1711 * Unicode 10.0.0 Support: Character encoding, character type info, and
1712 transliteration tables are all updated to Unicode 10.0.0, using
1713 generator scripts contributed by Mike FABIAN (Red Hat).
1714 These updates cause user visible changes, especially the changes in
1715 wcwidth for many emoji characters cause problems when emoji sequences
1716 are rendered with pango, see for example:
1717 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1719 * Collation of Hungarian has been overhauled and is now consistent with "The
1720 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1723 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1725 - The GNU C Library will now detect when /etc/resolv.conf has been
1726 modified and reload the changed configuration. The new resolver option
1727 âno-reloadâ (RES_NORELOAD) disables this behavior.
1729 - The GNU C Library now supports an arbitrary number of search domains
1730 (configured using the âsearchâ directive in /etc/resolv.conf);
1731 previously, there was a hard limit of six domains. For backward
1732 compatibility, applications that directly modify the â_resâ global
1733 object are still limited to six search domains.
1735 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1736 Library will now randomly pick a name server from the configuration as a
1737 starting point. (Previously, the second name server was always used.)
1739 * The tunables feature is now enabled by default. This allows users to tweak
1740 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1742 * New function reallocarray, which resizes an allocated block (like realloc)
1743 to the product of two sizes, with a guaranteed clean failure upon integer
1744 overflow in the multiplication. Originally from OpenBSD, contributed by
1745 Dennis Wölfing and RĂŒdiger Sonderfeld.
1747 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1748 These are extended versions of preadv and pwritev, respectively, taking an
1749 additional flags argument. The set of supported flags depends on the
1750 running kernel; full support currently requires kernel 4.7 or later.
1752 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1753 create a new session ID for the spawned process. This feature is
1754 scheduled to be added to the next major revision of POSIX; for the time
1755 being, it is available under _GNU_SOURCE.
1757 * errno.h is now safe to use from C-preprocessed assembly language on all
1758 supported operating systems. In this context, it will only define the
1759 Exxxx constants, as preprocessor macros expanding to integer literals.
1761 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1762 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1763 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1764 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1766 To compile programs that use this feature, the compiler must support
1767 128-bit floating point with the type name _Float128 (as defined by TS
1768 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1769 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1770 must be defined to make the new interfaces visible.
1772 The new functions and macros correspond to those present for other
1773 floating-point types (except for a few obsolescent interfaces not
1774 supported for the new type), with F128 or f128 suffixes; for example,
1775 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1776 printf or scanf formats for the new type; the strfromf128 and strtof128
1777 interfaces should be used instead.
1779 Deprecated and removed features, and other changes affecting compatibility:
1781 * The synchronization that pthread_spin_unlock performs has been changed to
1782 now be equivalent to a C11 atomic store with release memory order to the
1783 spin lock's memory location. Previously, several (but not all)
1784 architectures used stronger synchronization (e.g., containing what is
1785 often called a full barrier). This change can improve performance, but
1786 may affect odd fringe uses of spin locks that depend on the previous
1787 behavior (e.g., using spin locks as atomic variables to try to implement
1788 Dekker's mutual exclusion algorithm).
1790 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1793 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1794 will only be built and installed when the GNU C Library is configured with
1795 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1796 as TIRPC or rpcsvc-proto, to be used.
1798 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1799 libnss_compat, are deprecated, and will not be built or installed by
1802 The NIS(+) support library, libnsl, is also deprecated. By default, a
1803 compatibility shared library will be built and installed, but not headers
1804 or development libraries. Only a few NIS-related programs require this
1805 library. (In particular, the GNU C Library has never required programs
1806 that use 'gethostbyname' to be linked with libnsl.)
1808 Replacement implementations based on TIRPC, which additionally support
1809 IPv6, are available from <https://github.com/thkukuk/>. The configure
1810 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1811 name service modules, to be built and installed.
1813 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1814 support is enabled, the configured recursive resolver must support EDNS.
1815 (Responding to EDNS-enabled queries with responses which are not
1816 EDNS-enabled is fine, but FORMERR responses are not.)
1818 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1819 servers have not supported this opcode for a long time.
1821 * The _res_opcodes variable has been removed from libresolv. It had been
1822 exported by accident.
1824 * <string.h> no longer includes inline versions of any string functions,
1825 as this kind of optimization is better done by the compiler. The macros
1826 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1828 * The nonstandard header <xlocale.h> has been removed. Most programs should
1829 use <locale.h> instead. If you have a specific need for the definition of
1830 locale_t with no other declarations, please contact
1831 libc-alpha@sourceware.org and explain.
1833 * The obsolete header <sys/ultrasound.h> has been removed.
1835 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1837 * The obsolete function cfree has been removed. Applications should use
1840 * The stack_t type no longer has the name struct sigaltstack. This changes
1841 the C++ name mangling for interfaces involving this type.
1843 * The ucontext_t type no longer has the name struct ucontext. This changes
1844 the C++ name mangling for interfaces involving this type.
1846 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1847 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1848 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1849 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1850 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1851 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1852 fpregset_t type no longer has the name struct fpu. This changes the C++
1853 name mangling for interfaces involving those types.
1855 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1856 synced with the kernel:
1858 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1859 are not supported on this architecture and have been removed.
1861 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1862 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1863 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1865 Programs that assume the GET/SETREGS ptrace requests are universally
1866 available will now fail to build, instead of malfunctioning at runtime.
1868 Changes to build and runtime requirements:
1870 * Linux kernel 3.2 or later is required at runtime, on all architectures
1871 supported by that kernel. (This is a change from version 2.25 only for
1874 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1876 * On most architectures, GCC 4.9 or later is required to build the GNU C
1877 Library. On powerpc64le, GCC 6.2 or later is required.
1879 Older GCC versions and non-GNU compilers are still supported when
1880 compiling programs that use the GNU C Library. (We do not know exactly
1881 how old, and some GNU extensions to C may be _de facto_ required. If you
1882 are interested in helping us make this statement less vague, please
1883 contact libc-alpha@sourceware.org.)
1885 Security related changes:
1887 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1888 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1890 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1891 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1893 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1894 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1897 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1898 fixed (CVE-2017-12133).
1900 The following bugs are resolved with this release:
1902 [984] network: Respond to changed resolv.conf in gethostbyname
1903 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1904 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1906 [12189] libc: __stack_chk_fail should not attempt a backtrace
1908 [14096] time: Race condition on timezone/tst-timezone.out
1909 [14172] localedata: az_IR: new locale
1910 [14995] build: glibc fails to build if gold is the default linker, even if
1912 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1913 [16637] network: inet_pton function is accepting IPv6 with bad format
1914 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1915 x86 and other generic code
1916 [16875] localedata: ko_KR: fix lang_name
1917 [17225] localedata: ar_SY: localized month names for May and June are
1919 [17297] localedata: da_DK: wrong date_fmt string
1920 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1921 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1922 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1923 [19066] localedata: ar_SA abbreviated day and month names are in English
1924 [19569] network: resolv: Support an arbitrary number of search domains
1925 [19570] network: Implement random DNS server selection in the stub
1927 [19838] locale: localedef fails on PA-RISC
1928 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1929 order of 0D36 and 0D37
1930 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1932 [20098] libc: FAIL: debug/backtrace-tst on hppa
1933 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1935 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1937 [20313] localedata: Update locale data to Unicode 9.0
1938 [20424] manual: Document how to provide a malloc replacement
1939 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1941 [20686] locale: Add el_GR@euro to SUPPORTED.
1942 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1943 failures consistently
1944 [21015] dynamic-link: Document and fix --enable-bind-now
1945 [21016] nptl: pthread_cond support is broken on hppa
1946 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1947 frame-pointer on i386
1948 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1950 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1951 [21088] libc: Build fails with --enable-static-nss
1952 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1953 generic c code is used
1954 [21109] libc: Tunables broken on big-endian
1955 [21112] math: powf has large ulp errors with base close to 1 and exponent
1957 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1959 [21120] malloc: glibc malloc is incompatible with GCC 7
1960 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1962 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1963 (-0.0) when linking with -lieee
1964 [21171] math: log10, log2 and lgamma return incorrect results
1965 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1966 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1967 [21207] localedata: ce_RU: update weekdays from CLDR
1968 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1969 [21217] localedata: Update months from CLDR-31
1970 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1971 [21243] libc: support_delete_temp_file should issue warning for failed
1973 [21244] libc: support resolv_test_start() socket fd close should be
1975 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1976 new posix_spawn implementation
1977 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1978 leads to lower CPU frequency
1979 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1980 [21261] libc: [sparc64] bits/setjmp.h namespace
1981 [21267] network: [mips] bits/socket.h IOC* namespace
1982 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1983 [21270] libc: mmap64 silently truncates large offset values
1984 [21275] libc: posix_spawn always crashes on ia64 now
1985 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1986 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1987 [21289] libc: Incorrect declaration for 32-bit platforms with
1988 _FILE_OFFSET_BITS=64 causes build error
1989 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1990 not support gethostbyname4_r
1991 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1993 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1995 [21340] libc: Support POSIX_SPAWN_SETSID
1996 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1997 [21359] network: ns_name_pack needs additional byte in destination buffer
1998 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1999 against fragmentation attacks (CVE-2017-12132)
2000 [21369] network: resolv: Remove EDNS fallback
2001 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
2003 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
2004 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
2005 [21393] stdio: Missing dup3 error check in freopen, freopen64
2006 [21396] libc: Use AVX2 memcpy/memset on Skylake server
2007 [21399] localedata: Bad description for U00EC in
2008 localedata/charmaps/CP1254
2009 [21411] malloc: realloc documentation error
2010 [21426] network: sys/socket.h uio.h namespace
2011 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
2012 [21445] libc: signal.h bsd_signal namespace
2013 [21455] network: Network headers stdint.h namespace
2014 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
2016 [21475] network: resolv: Overlong search path is truncated mid-label
2017 [21511] libc: sigstack namespace
2018 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
2019 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
2020 bits/syscall.h: No such file or directory
2021 [21517] libc: struct sigaltstack namespace
2022 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
2023 [21533] localedata: Update locale data to Unicode 10.0
2025 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
2026 junk at end of line, first unrecognized character is `@'
2027 [21538] libc: SIG_HOLD missing for XPG4
2028 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
2029 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
2030 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
2031 [21543] libc: sigevent namespace
2032 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
2033 size for general purpose registers in mcontext_t structure
2034 [21550] libc: sigwait namespace
2035 [21552] libc: XPG4 bsd_signal namespace
2036 [21554] libc: sigpause namespace
2037 [21560] libc: sys/wait.h signal.h namespace
2038 [21561] libc: waitid namespace
2039 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
2040 '/usr/include/stdlib.h': Permission denied
2041 [21575] libc: sys/wait.h missing struct rusage definition
2042 [21584] libc: sigaltstack etc namespace
2043 [21597] libc: siginterrupt namespace
2044 [21607] math: hppa: FAIL: math/test-tgmath
2045 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
2047 [21622] libc: [tile] missing SA_* for POSIX.1:2008
2048 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
2049 stack and heap (CVE-2017-1000366)
2050 [21625] libc: wait3 namespace
2051 [21654] nss: Incorrect pointer alignment in NSS group merge result
2053 [21657] network: Parse interface zone id for node-local multicast
2054 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
2056 [21666] libc: .symver is used on common symbol
2057 [21668] network: resolv: res_init cross-thread broadcast introduces race
2059 [21687] math: tgmath.h totalorder, totalordermag return type
2060 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
2062 [21696] libc: Incorrect assumption of of __cpu_mask in
2063 posix/sched_cpucount.c
2064 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
2065 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
2067 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
2068 leading to relocation crash
2069 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
2070 `resolv_conf_matches (resp, conf)' failed.
2071 [21710] localedata: Added Samoan language locale for Samoa
2072 [21711] localedata: Pashto yesstr/nostr locale are missing
2073 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
2074 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
2075 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
2076 [21723] localedata: yesstr/nostr missing for Chinese language locale
2077 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
2079 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
2081 [21728] localedata: New Locale for Tongan language
2082 [21729] localedata: incorrect LC_NAME fields for hi_IN
2083 [21733] localedata: yesstr and nostr are missing for zh_HK
2084 [21734] localedata: Missing yesstr and nostr are for kw_GB
2085 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
2086 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
2087 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
2088 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
2090 [21744] libc: Tests failing on --enable-tunables --enable-stack-
2092 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
2094 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
2095 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
2096 [21759] localedata: missing yesstr and nostr for Tigrinya
2097 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
2098 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
2099 [21767] localedata: Missing Bislama locales
2100 [21768] localedata: Missing yesstr and nostr for aa_ET
2101 [21770] localedata: Missing Field in li_NL
2102 [21778] nptl: Robust mutex may deadlock
2103 [21779] libc: MicroBlaze segfaults when loading libpthread
2104 [21783] localedata: Fix int_select international_call_prefixes
2105 [21784] localedata: Inconsistency in country_isbn
2106 [21788] localedata: Missing Country Postal Abbreviations
2107 [21794] localedata: Added-country_isbn-for-Italy
2108 [21795] localedata: Add/Fix country_isbn for France
2109 [21796] localedata: Added country_isbn for Republic of Korea
2110 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
2111 [21799] localedata: Added int_select international_call_prefixes
2112 [21801] localedata: Added int_select international_call_prefixes
2113 [21804] nptl: Double semicolon in thread-shared-types.h
2114 [21807] localedata: LC_ADDRESS fix for pap_CW
2115 [21808] localedata: Fix LC_ADDRESS for pap_AW
2116 [21821] localedata: Added country_name in mai_IN
2117 [21822] localedata: Fix LC_TIME for mai_IN
2118 [21823] localedata: missing yesstr, nostr for sa_IN
2119 [21825] localedata: Fix name_mrs for mag_IN
2120 [21828] localedata: 2.26 changelog should mention user visible changes
2122 [21835] localedata: Added Maithili language locale for Nepal
2123 [21838] localedata: Removed redundant data for the_NP
2124 [21839] localedata: Fix LC_MONETARY for ta_LK
2125 [21844] localedata: Fix Latin characters and Months Sequence.
2126 [21848] localedata: Fix mai_NP Title Name
2131 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
2132 24731-2:2010, is supported to enable declarations of functions from that
2133 TR. Note that not all functions from that TR are supported by the GNU C
2136 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
2137 18661-1:2014, is supported to enable declarations of functions and macros
2138 from that TS. Note that not all features from that TS are supported by
2141 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2142 18661-4:2015, is supported to enable declarations of functions and macros
2143 from that TS. Note that most features from that TS are not supported by
2146 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2147 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2148 Since the GNU C Library defaults to a much newer revision of POSIX, this
2149 will only affect programs that specifically request an old conformance
2150 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2151 see a change in the visible declarations, but a program compiled with
2152 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2155 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2156 defined by all multithreaded code, but glibc has not required this for
2159 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2160 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
2161 will only be available from <sys/sysmacros.h>.
2163 These macros are not part of POSIX nor XSI, and their names frequently
2164 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2165 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2166 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2169 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2170 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2171 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2173 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2174 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2175 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2176 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2177 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2178 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2179 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2180 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2181 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2182 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2183 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2186 * New <math.h> features are added from TS 18661-1:2014:
2188 - Signaling NaN macros: SNANF, SNAN, SNANL.
2190 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2191 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2192 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2194 - llogb functions: the llogb, llogbf and llogbl functions, and the
2195 FP_LLOGB0 and FP_LLOGBNAN macros.
2197 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2200 - Comparison macros: iseqsig.
2202 - Classification macros: iscanonical, issubnormal, iszero.
2204 - Total order functions: totalorder, totalorderf, totalorderl,
2205 totalordermag, totalordermagf, totalordermagl.
2207 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2209 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2210 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2212 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2213 are added to libc. They convert a floating-point number into string.
2215 * Most of glibc can now be built with the stack smashing protector enabled.
2216 It is recommended to build glibc with --enable-stack-protector=strong.
2217 Implemented by Nick Alcock (Oracle).
2219 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2220 intended to be used instead of memset() to erase sensitive data after use;
2221 the compiler will not optimize out calls to explicit_bzero even if they
2222 are "unnecessary" (in the sense that no _correct_ program can observe the
2223 effects of the memory clear).
2225 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2226 to float instead of double. This does not affect the ABI of any libraries
2227 that are part of the GNU C Library, but may affect the ABI of other
2228 libraries that use this type in their interfaces.
2230 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2231 float_t and double_t types are now defined to long double instead of float
2232 and double. These options are not the default, and this does not affect
2233 the ABI of any libraries that are part of the GNU C Library, but it may
2234 affect the ABI of other libraries that use this type in their interfaces,
2235 if they are compiled or used with those options.
2237 * The getentropy and getrandom functions, and the <sys/random.h> header file
2240 * The buffer size for byte-oriented stdio streams is now limited to 8192
2241 bytes by default. Previously, on Linux, the default buffer size on most
2242 file systems was 4096 bytes (and thus remains unchanged), except on
2243 network file systems, where the buffer size was unpredictable and could be
2244 as large as several megabytes.
2246 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2247 for the Linux quota interface which predates kernel version 2.4.22 has
2250 * The malloc_get_state and malloc_set_state functions have been removed.
2251 Already-existing binaries that dynamically link to these functions will
2252 get a hidden implementation in which malloc_get_state is a stub. As far
2253 as we know, these functions are used only by GNU Emacs and this change
2254 will not adversely affect already-built Emacs executables. Any undumped
2255 Emacs executables, which normally exist only during an Emacs build, should
2256 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
2258 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
2259 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2260 âno-ip6-dotintâ had already been the default, and support for the
2261 âip6-dotintâ option was removed from the Internet in 2006.
2263 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2264 flag from <resolv.h> have been removed. The option relied on a
2265 backwards-incompatible DNS extension which was never deployed on the
2268 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2269 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2270 They were already unimplemented.
2272 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2273 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2274 removed again from the IETF name lookup interface specification in RFC
2275 2553. Applications should use getaddrinfo instead.
2277 * DNSSEC-related declarations and definitions have been removed from the
2278 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2279 decode the data part of DNSSEC record types. Previous versions of glibc
2280 only implemented minimal support for the previous version of DNSSEC, which
2281 is incompatible with the currently deployed version.
2283 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2284 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2285 <arpa/nameser.h> header file because the distinction between RR types and
2286 meta-RR types is not officially standardized, subject to revision, and
2287 thus not suitable for encoding in a macro.
2289 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2290 and rhook members of the res_state type in <resolv.h> have been removed.
2291 The glibc stub resolver did not support these hooks, but the header file
2292 did not reflect that.
2294 * For multi-arch support it is recommended to use a GCC which has
2295 been built with support for GNU indirect functions. This ensures
2296 that correct debugging information is generated for functions
2297 selected by IFUNC resolvers. This support can either be enabled by
2298 configuring GCC with '--enable-gnu-indirect-function', or by
2299 enabling it by default by setting 'default_gnu_indirect_function'
2300 variable for a particular architecture in the GCC source file
2303 * GDB pretty printers have been added for mutex and condition variable
2304 structures in POSIX Threads. When installed and loaded in gdb these pretty
2305 printers show various pthread variables in human-readable form when read
2306 using the 'print' or 'display' commands in gdb.
2308 * Tunables feature added to allow tweaking of the runtime for an application
2309 program. This feature can be enabled with the '--enable-tunables' configure
2310 flag. The GNU C Library manual has details on usage and README.tunables has
2311 instructions on adding new tunables to the library.
2313 * A new version of condition variables functions have been implemented in
2314 the NPTL implementation of POSIX Threads to provide stronger ordering
2317 * A new version of pthread_rwlock functions have been implemented to use a more
2318 scalable algorithm primarily through not using a critical section anymore to
2321 Security related changes:
2323 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2324 have been created with makecontext could fail to terminate due to a
2325 missing .cantunwind annotation. This has been observed to lead to a hang
2326 (denial of service) in some Go applications compiled with gccgo. Reported
2327 by Andreas Schwab. (CVE-2016-6323)
2329 * The DNS stub resolver functions would crash due to a NULL pointer
2330 dereference when processing a query with a valid DNS question type which
2331 was used internally in the implementation. The stub resolver now uses a
2332 question type which is outside the range of valid question type values.
2335 The following bugs are resolved with this release:
2337 [4099] stdio: Overly agressive caching by stream i/o functions.
2338 [7065] build: Support building glibc with -fstack-protector or -fstack-
2340 [9842] localedata: en_CA: incorrect date format
2341 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2342 before it started waiting
2343 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2344 [15765] nptl: sem_open is wrongly a cancellation point
2345 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2346 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2348 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2349 library linked with pthread
2350 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2351 "FIXME: Ingo" issue)
2352 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2353 [17252] libc: getrandom and getentropy syscall
2354 [17730] malloc: thread-local storage is sometimes improperly free()'d
2355 after being __libc_memalign()'d
2356 [18241] stdio: failed fseek on memstream does not set errno and can fail
2358 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2360 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2361 PTHREAD_PRIO_INHERIT mutex on ARM
2362 [18784] network: res_query and related function crash for special record
2363 type queries (CVE-2015-5180)
2364 [19380] math: strtod does not raise "inexact"
2365 [19387] string: Integer overflow in memchr
2366 [19390] string: Integer overflow in strncat
2367 [19398] build: linknamespace tests fail with massively parallel build
2368 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2370 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2371 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2372 [19514] libc: [PATCH] Fix spelling errors in spelling
2373 "implement"/"implementation" in several places
2374 [19582] network: Deprecate RES_USE_INET6
2375 [19673] manual: clog10 docs appear to be erroneous
2376 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2377 causes a segmentation fault
2378 [19826] libc: invalid pointer returned from __tls_get_addr with static
2380 [20016] network: resolv: Remove hooks support from the API
2381 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2383 [20033] math: [x86_64] vectorized math function don't call the __finite
2385 [20116] nptl: use after free in pthread_create
2386 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2387 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2389 [20311] nptl: please install proc_service.h
2390 [20366] libc: Compilation errors in installed headers in strict-compliance
2392 [20370] malloc: malloc: Arena free list management is still racy
2393 (incorrect fix in bug 19243)
2394 [20386] libc: assert (X = 0) does not result in GCC warning
2395 [20432] malloc: malloc: Minimize interface required for interposition
2396 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2397 in _Unwind_Backtrace (CVE-2016-6323)
2398 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2399 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2401 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2402 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2403 [20477] network: resolv: incorrect double-checked locking related to
2405 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2407 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2409 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2410 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2411 cause transition penalty
2412 [20517] math: sparcv9 missing fdiml compat symbol
2413 [20524] manual: strverscmp is inconsistent
2414 [20525] libc: <sys/quota.h> should be based on kernel headers
2415 [20539] math: GCC 7 -static -lm fails to link at -O3
2416 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2418 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2420 [20591] network: Remove obsolete DNSSEC support
2421 [20592] network: DNS resource record type classification macros in
2422 <arpa/nameser.h> are incorrect
2423 [20593] network: Update DNS RR type definitions
2424 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2425 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2427 [20629] network: libresolv: Remove support for bitstring labels
2429 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2430 assertion: "maxidx >= 2"
2431 [20660] math: [arm] Use VSQRT
2432 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2433 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2434 [20689] libc: Test for FMA should also check for AVX.
2435 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2436 [20715] math: iszero macro breaks existing code
2437 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2438 [20728] libc: powerpc: Missing TOC stub in clone
2439 [20729] build: glibc-2.24 fails to build for i486 with -Os
2440 [20750] build: Build fails with default PIE enabled gcc-6.x
2441 [20768] math: [alpha] sqrt fegetenv namespace
2442 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2444 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2445 __FLT_EVAL_METHOD__ is 2
2446 [20790] network: rpcgen buffer overrun in get_prog_declaration
2447 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2448 [20829] libc: crypt snprintf namespace
2449 [20847] libc: tst-vfork3 failure
2450 [20855] math: Default bits/mathdef.h has inappropriate float_t
2451 [20859] math: [sh4] FP_ILOGB0 invalid
2452 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2453 U+20AC), not same as GBK
2454 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2455 [20916] math: pow handling of sNaN arguments
2456 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2457 [20919] math: Bad pow (qNaN, 0) result with -lieee
2458 [20940] math: hypot sNaN handling
2459 [20947] math: fmax, fmin sNaN handling
2460 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2461 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2463 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2464 [20973] nptl: robust mutexes: Lost wake-ups
2465 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2466 [20978] nis: strlen on null pointer in nss_nisplus
2467 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2469 [21014] string: i686 memchr overflows internal pointer check
2470 [21019] libc: [mips] n32 lseek incorrect on overflow
2471 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2472 [21026] libc: [MIPS] readahead syscall is broken on n64
2473 [21028] math: Fallback fesetexceptflag should always succeed
2474 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2475 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2477 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2478 [21061] librt: [microblaze] librt lost clock_* exports
2479 [21073] libc: tunables: insecure environment variables passed to
2480 subprocesses with AT_SECURE
2481 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2485 * The minimum Linux kernel version that this version of the GNU C Library
2486 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2487 kernel version 2.6.32 or later suffices (on architectures that already
2488 required kernel versions more recent than 3.2, those requirements remain
2489 unchanged). Linux 3.2 or later kernel headers are required on all
2492 * The pap_AN locale has been deleted. This has been deprecated for a long
2493 time. It has been replaced by pap_AW & pap_CW, both of which have long
2494 been included in previous releases.
2496 * The readdir_r and readdir64_r functions have been deprecated. It is
2497 recommended to use readdir and readdir64 instead.
2499 * The type âunion waitâ has been removed. It was deprecated in the early
2500 1990s and never part of POSIX. Application code should use the int type
2501 instead of âunion waitâ.
2503 * A new NSS action is added to facilitate large distributed system
2504 administration. The action, MERGE, allows remote user stores like LDAP
2505 to be merged into local user stores like /etc/groups in order to provide
2506 easy to use, updated, and managed sets of merged credentials. The new
2507 action can be used by configuring it in /etc/nsswitch.conf:
2508 group: files [SUCCESS=merge] nis
2509 Implemented by Stephen Gallagher (Red Hat).
2511 * The deprecated __malloc_initialize_hook variable has been removed from the
2514 * The long unused localedef --old-style option has been removed. It hasn't
2515 done anything in over 16 years. Scripts using this option can safely
2518 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2519 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2520 return the next representable value in the direction of positive infinity
2521 and the nextdown functions return the next representable value in the
2522 direction of negative infinity. These are currently enabled as GNU
2525 Security related changes:
2527 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2528 could result in a stack overflow when getnetbyname was called with an
2529 overly long name. (CVE-2016-3075)
2531 * Previously, getaddrinfo copied large amounts of address data to the stack,
2532 even after the fix for CVE-2013-4458 has been applied, potentially
2533 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2534 instead. Reported by Michael Petlan. (CVE-2016-3706)
2536 * The glob function suffered from a stack-based buffer overflow when it was
2537 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2538 Reported by Alexander Cherepanov. (CVE-2016-1234)
2540 * The Sun RPC UDP client could exhaust all available stack space when
2541 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2542 alloca plugin for GCC. (CVE-2016-4429)
2544 * The IPv6 name server management code in libresolv could result in a memory
2545 leak for each thread which is created, performs a failing naming lookup,
2546 and exits. Over time, this could result in a denial of service due to
2547 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2549 The following bugs are resolved with this release:
2551 [1170] localedata: ne_NP: update Nepali locale definition file
2552 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2554 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2555 [6796] math: fdim() does not set errno on overflow
2556 [10354] libc: posix_spawn should use vfork() in more cases than presently
2557 [11213] localedata: localedata: add copyright disclaimer to locale files
2558 [12143] localedata: chr_US: new Cherokee locale
2559 [12450] localedata: sgs_LT: new locale
2560 [12676] localedata: ln_CD: new locale
2561 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2563 [13304] math: fma, fmaf, fmal produce wrong results
2564 [14259] build: --localedir arg to configure is ignored
2565 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2566 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2567 [14934] localedata: es_CL: wrong first weekday chilean locale
2568 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2570 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2572 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2573 [15368] nptl: raise() is not async-signal-safe
2574 [15479] math: ceil, floor, round and trunc raise inexact exception
2575 [15578] localedata: kk_KZ: various updates
2576 [16003] localedata: pap_AN: punt old locale
2577 [16137] localedata: iw_IL: punt old locale
2578 [16190] localedata: eo: new esperanto locale
2579 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2580 [16742] malloc: race condition: pthread_atfork() called before first
2581 malloc() results in unexpected locking behaviour/deadlocks
2582 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2584 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2585 [17565] localedata: pt_PT: wrong (work-)week start
2586 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2587 [17950] build: Build fails with -msse
2588 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2589 [18433] libc: posix_spawn does not return correctly upon failure to
2591 [18453] localedata: charmaps/IBM875: incorrect codes
2592 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2594 [18896] localedata: he_IL: improvements for currency
2595 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2596 Romanian locale data
2597 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2599 [19056] libc: Deprecate readdir_r
2600 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2602 [19198] localedata: nl_NL: small improvements for Dutch locales
2603 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2604 nameservers (CVE-2016-5417)
2605 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2607 [19400] locale: Language missing in "iso-639.def", trivial fix in
2609 [19431] malloc: Deadlock between fflush, getdelim, and fork
2610 [19505] libc: Incorrect file descriptor validity checks in
2611 posix_spawn_file_actions_add{open,close,dup2}
2612 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2613 when using RTLD_NEXT
2614 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2615 `intl/{gettextP,loadinfo}.h'
2616 [19534] libc: execle, execlp may use malloc
2617 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2618 [19573] network: res_nclose and __res_maybe_init disagree about name
2619 server initialization, breaking Hesiod
2620 [19575] localedata: Status of GB18030 tables
2621 [19581] localedata: sr_* date_fmt string contains additional newline
2622 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2624 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2625 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2626 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2627 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2629 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2631 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2633 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2634 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2635 [19633] locale: strfmon_l applies global locale to number formatting
2636 [19642] network: Memory leak in getnameinfo
2637 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2638 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2640 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2641 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2643 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2644 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2646 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2648 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2650 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2651 pointers and lengths in error-case.
2652 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2653 report errors on UTF-16 surrogates values.
2654 [19755] nscd: nscd assertion failure in gc
2655 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2656 [19759] libc: mempcpy shouldn't be inlined
2657 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2658 [19765] libc: s390 needs an optimized mempcpy
2659 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2660 NAME_MAX limit assumption (CVE-2016-1234)
2661 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2662 [19787] network: Missing and incorrect truncation checks in getnameinfo
2663 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2665 [19791] network: Assertion failure in res_query.c with un-connectable name
2667 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2668 [19822] math: libm.so install clobbers old version
2669 [19825] network: resolv: send_vc can return uninitialized data in second
2670 response to getaddrinfo
2671 [19830] network: nss_dns: should check RDATA length against buffer length
2672 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2673 confronted with A/AAAA records of invalid size
2674 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2675 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2676 [19853] stdio: Printing IBM long double in decimal with high precision is
2678 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2679 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2680 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2682 [19865] network: Assertion failure or memory leak in
2683 _nss_dns_getcanonname_r
2684 [19868] network: nss_dns: netent code does not skip over non-PTR records
2685 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2687 [19881] string: Improve x86-64 memset
2688 [19907] string: Incorrect memcpy tests
2689 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2691 [19925] libc: termios.h XCASE namespace
2692 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2693 [19929] libc: limits.h NL_NMAX namespace
2694 [19931] stdio: Memory leak in vfprintf
2695 [19957] libc: clone(CLONE_VM) access invalid parent memory
2696 [19963] localedata: en_IL: New locale
2697 [19989] stdio: stdio.h cuserid namespace
2698 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2700 [19996] locale: langinfo.h nl_langinfo_l namespace
2701 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2702 [20010] network: getaddrinfo: Stack overflow in hostent translation
2704 [20012] stdio: libio: fmemopen append mode failure
2705 [20014] stdio: stdio.h namespace for pre-threads POSIX
2706 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2707 [20023] libc: fcntl.h timespec namespace
2708 [20024] math: [x86_64] vectorized sincos trashes the stack
2709 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2710 [20041] time: sys/time.h timespec namespace
2711 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2712 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2713 [20051] libc: ttyslot in wrong header under wrong conditions
2714 [20054] libc: gethostname not declared for XPG4
2715 [20055] libc: termios.h missing tcgetsid for XPG4
2716 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2718 [20073] libc: sys/stat.h fchmod namespace
2719 [20074] libc: stdlib.h rand_r namespace
2720 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2721 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2723 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2724 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2726 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2727 [20119] libc: Wrong mask for processors level type from CPUID
2728 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2729 AS not supporting AVX512
2730 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2732 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2733 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2735 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2736 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2737 [20178] libc: posix_spawn{p} should not call exit
2738 [20191] stdio: libio: vtables hardening
2739 [20195] string: FMA4 detection requires CPUID execution with register
2741 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2742 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2744 [20212] math: acos (sNaN) returns sNaN
2745 [20213] math: asin (sNaN) returns sNaN
2746 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2747 [20218] math: [i386] asinhl (sNaN) returns sNaN
2748 [20219] math: [i386] atanhl (sNaN) returns sNaN
2749 [20222] stdio: fopencookie: Mangle function pointers
2750 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2751 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2752 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2754 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2755 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2756 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2757 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2758 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2759 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2760 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2761 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2762 [20240] math: modf (sNaN) returns sNaN
2763 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2764 [20250] math: frexp (sNaN) returns sNaN
2765 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2766 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2768 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2769 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2770 subscript is below array bounds [-Werror=array-bounds]
2771 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2772 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2774 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2775 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2777 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2778 "invalid" exceptions
2779 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2780 [20316] localedata: id_ID: Februari instead of Pebruari
2781 [20327] string: POWER8 strcasecmp returns incorrect result
2782 [20347] math: Failure: Test: j0_downward (0xap+0)
2783 [20348] libc: FAIL: misc/tst-preadvwritev64
2784 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2785 [20350] libc: There is no test for p{read,write}64
2786 [20357] math: Incorrect cos result for 1.5174239687223976
2787 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2791 * Unicode 8.0.0 Support: Character encoding, character type info, and
2792 transliteration tables are all updated to Unicode 8.0.0, using new
2793 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2794 These updates cause user visible changes, such as the fixes for bugs
2795 89, 16061, and 18568.
2797 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2798 kernel-internal CPU set size. This means that requests that change the
2799 CPU affinity which failed before (for example, an all-ones CPU mask) will
2800 now succeed. Applications that need to determine the effective CPU
2801 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2802 setting it because the kernel can adjust it (and the previous size check
2803 would not detect this in the majority of cases).
2805 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2806 the following new symbols are used: fts64_children, fts64_close,
2807 fts64_open, fts64_read and fts64_set.
2809 * getaddrinfo now detects certain invalid responses on an internal netlink
2810 socket. If such responses are received, an affected process will
2811 terminate with an error message of "Unexpected error <number> on netlink
2812 descriptor <number>" or "Unexpected netlink response of size <number> on
2813 descriptor <number>". The most likely cause for these errors is a
2814 multi-threaded application which erroneously closes and reuses the netlink
2815 file descriptor while it is used by getaddrinfo.
2817 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2818 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2819 unnecessary serialization of memory allocation requests across threads.
2820 The defect is now corrected. Users should see a substantial increase in
2821 the concurent throughput of allocation requests for applications which
2822 trigger this bug. Affected applications typically create and
2823 destroy threads frequently. (Bug 19048 was reported and analyzed by
2826 * There is now a --disable-timezone-tools configure option for disabling the
2827 building and installing of the timezone related utilities (zic, zdump, and
2828 tzselect). This is useful for people who build the timezone data and code
2829 independent of the GNU C Library.
2831 * The obsolete header <regexp.h> has been removed. Programs that require
2832 this header must be updated to use <regex.h> instead.
2834 * The obsolete functions bdflush, create_module, get_kernel_syms,
2835 query_module and uselib are no longer available to newly linked binaries;
2836 the header <sys/kdaemon.h> has been removed. These functions and header
2837 were specific to systems using the Linux kernel and could not usefully be
2838 used with the GNU C Library on systems with version 2.6 or later of the
2841 * Optimized string, wcsmbs and memory functions for IBM z13.
2842 Implemented by Stefan Liebler.
2844 * Newly linked programs that define a variable called signgam will no longer
2845 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2846 require signgam to be set by those functions must ensure that they use the
2847 variable provided by the GNU C Library and declared in <math.h>, without
2848 defining their own copy.
2850 * The minimum GCC version that can be used to build this version of the GNU
2851 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2852 still be used to compile programs using the GNU C Library.
2854 Security related changes:
2856 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2857 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2859 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2860 the pointer guard feature. It is always enabled. Previously,
2861 LD_POINTER_GUARD could be used to disable security hardening in binaries
2862 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2865 * An integer overflow in hcreate and hcreate_r could lead to an
2866 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2868 * The catopen function no longer has unbounded stack usage. Reported by
2869 Max. (CVE-2015-8779)
2871 * The nan, nanf and nanl functions no longer have unbounded stack usage
2872 depending on the length of the string passed as an argument to the
2873 functions. Reported by Joseph Myers. (CVE-2014-9761)
2875 * A stack-based buffer overflow was found in libresolv when invoked from
2876 libnss_dns, allowing specially crafted DNS responses to seize control
2877 of execution flow in the DNS client. The buffer overflow occurs in
2878 the functions send_dg (send datagram) and send_vc (send TCP) for the
2879 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2880 family. The use of AF_UNSPEC triggers the low-level resolver code to
2881 send out two parallel queries for A and AAAA. A mismanagement of the
2882 buffers used for those queries could result in the response of a query
2883 writing beyond the alloca allocated buffer created by
2884 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2885 the overflow. Thanks to the Google Security Team and Red Hat for
2886 reporting the security impact of this issue, and Robert Holiday of
2887 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2889 The following bugs are resolved with this release:
2891 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2892 [887] math: Math library function "logb" and "nextafter" inconsistent
2893 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2894 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2895 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2896 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2898 [4404] localedata: German translation of "Alarm clock" is misleading
2899 [6799] math: nextafter() and nexttoward() doen't set errno on
2900 overflow/underflow errors
2901 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2903 [10432] nis: _nss_nis_setnetgrent assertion failure
2904 [11460] libc: fts has no LFS support
2905 [12926] network: getaddrinfo()/make_request() may spin forever
2906 [13065] nptl: Race condition in pthread barriers
2907 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2908 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2910 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2911 [14912] libc: Rename non-installed bits/*.h headers
2912 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2913 [15367] math: Let gcc use __builtin_isinf
2914 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2915 [15421] math: lgamma wrongly sets signgam for ISO C
2916 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2917 FE_INVALID with argument out of range
2918 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2920 [15786] dynamic-link: ifunc resolver functions can smash function
2922 [15918] math: Unnecessary check for equality in hypotf()
2923 [16061] localedata: Review / update transliteration data
2924 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2926 [16141] time: strptime %z offset restriction
2927 [16171] math: drem should be alias of remainder
2928 [16296] math: fegetround is pure?
2929 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2930 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2932 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2933 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2935 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2936 "Exception "Inexact" set" on ppc32
2937 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2938 [16517] math: Missing underflow exception from tanf/tan/tanl
2939 [16519] math: Missing underflow exception from sinhf
2940 [16520] math: Missing underflow exception from tanhf
2941 [16521] math: Missing underflow exception from exp2
2942 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2944 [16734] stdio: fopen calls mmap to allocate its buffer
2945 [16961] math: nan function incorrect handling of bad sequences
2946 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2947 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2948 [16985] locale: localedef: confusing error message when opening output
2950 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2951 [17197] locale: Redundant shift character in iconv conversion output at
2953 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2954 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2955 [17250] dynamic-link: static linking breaks nss loading
2956 (getaddrinfo/getpwnam/etc...)
2957 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2959 [17441] math: isnan() should use __builtin_isnan() in GCC
2960 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2961 (related to lock elision)
2962 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2963 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2964 [17887] time: strptime should be able to parse "+01:00" style timezones
2965 [17905] libc: catopen() Multiple unbounded stack allocations
2967 [18084] libc: backtrace (..., 0) dumps core on x86
2968 [18086] libc: nice() sets errno to 0 on success
2969 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2970 is too large (CVE-2015-8778)
2971 [18251] dynamic-link: SONAME missing when audit modules provides path
2972 [18265] libc: add attributes for wchar string and memory functions
2973 [18370] math: csqrt missing underflows
2974 [18421] libc: [hppa] read-only segment has dynamic relocations
2975 [18472] libc: Obsolete syscall wrappers should be compat symbols
2976 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2977 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2978 [18525] localedata: Remove locale timezone information
2979 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2980 [18568] localedata: Update locale data to Unicode 8.0
2981 [18589] locale: sort-test.sh fails at random
2982 [18595] math: ctan, ctanh missing underflows
2983 [18604] libc: assert macro-expands its argument
2984 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2985 contains a vector instruction exception.
2986 [18611] math: j1, jn missing errno setting on underflow
2987 [18618] localedata: sync Chechen locale definitions with other *_RU
2989 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2990 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2991 [18665] network: In send_dg, the recvfrom function is NOT always using the
2992 buffer size of a newly created buffer (CVE-2015-7547)
2993 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2995 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2997 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2998 [18699] math: tilegx cproj() for various complex infinities does not yield
3000 [18724] libc: Harden put*ent functions against data injection
3001 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
3002 [18755] build: build errors with -DNDEBUG
3003 [18757] stdio: fmemopen fails to set errno on failure
3004 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
3006 [18781] libc: openat64 lacks O_LARGEFILE
3007 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
3008 error: canât find a register in class âR1_REGSâ while reloading âasmâ
3009 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
3010 [18790] math: [ldbl-128ibm] tanhl inaccurate
3011 [18795] libc: stpncpy fortification misses buffer lengths that are
3012 statically too large
3013 [18796] build: build fails for --disable-mathvec
3014 [18803] math: hypot missing underflows
3015 [18820] stdio: fmemopen may leak memory on failure
3016 [18823] math: csqrt spurious underflows
3017 [18824] math: fma spurious underflows
3018 [18825] math: pow missing underflows
3019 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
3020 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
3021 [18870] build: sem_open.c fails to compile with missing symbol
3023 [18872] stdio: Fix memory leak in printf_positional
3024 [18873] libc: posix_fallocate overflow check ineffective
3025 [18875] math: Excess precision leads incorrect libm
3026 [18877] libc: arm: mmap offset regression
3027 [18887] libc: memory corruption when using getmntent on blank lines
3028 [18918] localedata: hu_HU: change time to HH:MM:SS format
3029 [18921] libc: Regression: extraneous stat() and fstat() performed by
3031 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
3032 binaries (CVE-2015-8777)
3033 [18951] math: tgamma missing underflows
3034 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
3036 [18953] localedata: lt_LT: change currency symbol to the euro
3037 [18956] math: powf inaccuracy
3038 [18961] math: [i386] exp missing underflows
3039 [18966] math: [i386] exp10 missing underflows
3040 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
3041 [18969] build: multiple string test failures due to missing locale
3043 [18970] libc: Reference of pthread_setcancelstate in libc.a
3044 [18977] math: float / long double Bessel functions not in XSI POSIX
3045 [18980] math: i386 libm functions return with excess range and precision
3046 [18981] math: i386 scalb*, ldexp return with excess range and precision
3047 [18982] stdio: va_list and vprintf
3048 [18985] time: Passing out of range data to strftime() causes a segfault
3050 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
3051 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
3052 [19012] locale: iconv_open leaks memory on error path
3053 [19016] math: clog, clog10 inaccuracy
3054 [19018] nptl: Mangle function pointers in tls_dtor_list
3055 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
3056 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
3057 [19048] malloc: malloc: arena free list can become cyclic, increasing
3059 [19049] math: [powerpc] erfc incorrect zero sign
3060 [19050] math: [powerpc] log* incorrect zero sign
3061 [19058] math: [x86_64] Link fail with -fopenmp and -flto
3062 [19059] math: nexttoward overflow incorrect in non-default rounding modes
3063 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
3064 [19074] network: Data race in _res_hconf_reorder_addrs
3065 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
3066 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
3067 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
3069 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
3071 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
3072 [19086] manual: posix_fallocate64 documented argument order is wrong.
3073 [19088] math: lround, llround missing exceptions close to overflow
3075 [19094] math: lrint, llrint missing exceptions close to overflow threshold
3076 [19095] math: dbl-64 lrint incorrect for 64-bit long
3077 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
3078 [19124] dynamic-link: ld.so failed to build with older assmebler
3079 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
3080 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
3081 [19134] math: [powerpc32] lround, lroundf spurious exceptions
3082 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
3083 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
3084 pthread_setaffinity_np
3085 [19156] math: [ldbl-128] j0l spurious underflows
3086 [19164] nptl: tst-getcpu fails with many possible CPUs
3087 [19168] math: math/test-ildoubl and math/test-ldouble failure
3088 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
3089 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
3091 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
3092 (FE_NOMASK_ENV) do not clear SSE exceptions
3093 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
3094 _int_new_arena/reused_arena
3095 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
3096 [19201] math: dbl-64 remainder incorrect sign of zero result
3097 [19205] math: bits/math-finite.h conditions do not match math.h and
3099 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
3100 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
3101 for C99-based standards
3102 [19212] libc: features.h not -Wundef clean
3103 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
3105 [19214] libc: Family and model identification for AMD CPU's are incorrect.
3106 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
3107 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
3109 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
3110 "inexact" exceptions
3111 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
3113 [19242] libc: strtol incorrect in Turkish locales
3114 [19243] malloc: reused_arena can pick an arena on the free list, leading
3115 to an assertion failure and reference count corruption
3116 [19253] time: tzset() ineffective when temporary TZ did not include DST
3118 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
3119 [19270] math: [hppa] Shared libm missing __isnanl
3120 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
3121 MAP_HUGETLB and MAP_STACK defines
3122 [19313] nptl: Wrong __cpu_mask for x32
3123 [19347] libc: grantpt: try to force a specific gid even without pt_chown
3124 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
3125 [19350] math: [ldbl-128ibm] sinhl spurious overflows
3126 [19351] math: [ldbl-128ibm] logl inaccurate near 1
3127 [19363] time: x32: times() return value wrongly truncates/sign extends
3129 [19367] dynamic-link: Improve branch prediction on Silvermont
3130 [19369] network: Default domain name not reset by res_ninit when "search"
3131 / "domain" entry is removed from resolv.conf
3132 [19375] math: powerpc: incorrect results for POWER7 logb with negative
3134 [19385] localedata: bg_BG: time separator should be colon, not comma
3135 [19408] libc: linux personality syscall wrapper may erroneously return an
3136 error on 32-bit architectures
3137 [19415] libc: dladdr returns wrong names on hppa
3138 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
3139 IBM905, IBM907, and IBM909
3140 [19439] math: Unix98 isinf and isnan functions conflict with C++11
3141 [19443] build: build failures with -DDEBUG
3142 [19451] build: Make check fails on test-double-vlen2
3143 [19462] libc: Glibc failed to build with -Os
3144 [19465] math: Wrong code with -Os
3145 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3147 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3149 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3150 [19486] math: S390: Math tests fail with "Exception Inexact set".
3151 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3152 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3154 [19590] math: Fail to build shared objects that use libmvec.so functions.
3158 * The following bugs are resolved with this release:
3160 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3161 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3162 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3163 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3164 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3165 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3166 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3167 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3168 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3169 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3170 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3171 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3172 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3173 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3174 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3175 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3176 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3177 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3178 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3179 18657, 18676, 18694, 18696, 18887.
3181 * Cache information can be queried via sysconf() function on s390 e.g. with
3182 _SC_LEVEL1_ICACHE_SIZE as argument.
3184 * A buffer overflow in gethostbyname_r and related functions performing DNS
3185 requests has been fixed. If the NSS functions were called with a
3186 misaligned buffer, the buffer length change due to pointer alignment was
3187 not taken into account. This could result in application crashes or,
3188 potentially arbitrary code execution, using crafted, but syntactically
3189 valid DNS responses. (CVE-2015-1781)
3191 * The time zone file parser has been made more robust against crafted time
3192 zone files, avoiding heap buffer overflows related to the processing of
3193 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3194 large time zone data files. Overly long time zone specifiers in the TZ
3195 variable no longer result in stack overflows and crashes.
3197 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3198 for LD and GD on x86 and x86-64, has been implemented. You will need
3199 binutils-2.24 or later to enable this optimization.
3201 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3202 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3203 Hat). These updates cause user visible changes, such as the fix for bug
3206 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3207 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3208 condition in some applications.
3210 * Added vector math library named libmvec with the following vectorized x86_64
3211 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3213 The library can be disabled with --disable-mathvec. Use of the functions is
3214 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3215 Shared library libmvec.so is linked in as needed when using -lm (no need to
3216 specify -lmvec explicitly for not static builds).
3217 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3219 * A new fmemopen implementation has been added with the goal of POSIX
3220 compliance. The new implementation fixes the following long-standing
3221 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3222 old implementation is still present for use be by existing binaries.
3224 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3225 releases. It has been fixed to match 2.19 and older, but binaries built
3226 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3228 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3229 Contributed by Roland McGrath (Google).
3231 * The header <regexp.h> is deprecated, and will be removed in a future
3232 release. Use of this header will trigger a deprecation warning.
3233 Application developers should update their code to use <regex.h> instead.
3235 This header was formerly part of SUS, but was deprecated in 1994 and
3236 removed from the standard in 2001. Also, the glibc implementation
3237 leaks memory. See BZ#18681 for more details.
3241 * The following bugs are resolved with this release:
3243 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3244 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3245 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3246 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3247 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3248 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3249 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3250 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3251 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3252 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3255 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3256 too little memory for the to-be-scanned arguments and overflow the
3257 allocated buffer. The implementation now correctly computes the required
3258 buffer size when using malloc, and switches to malloc from alloca as
3261 * A new semaphore algorithm has been implemented in generic C code for all
3262 machines. Previous custom assembly implementations of semaphore were
3263 difficult to reason about or ensure that they were safe. The new version
3264 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3265 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3266 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3268 * Port to Altera Nios II has been contributed by Mentor Graphics.
3270 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3271 implementations for powerpc64/powerpc64le.
3272 Implemented by Adhemerval Zanella (IBM).
3274 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3275 and powerpc64le. This may improve lock scaling of existing programs on
3276 HTM capable systems. The lock elision code is only enabled with
3277 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3278 powerpc will issue a transaction abort on every syscall to avoid side
3279 effects being visible outside transactions.
3281 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3282 AArch64. Contributed by ARM Ltd.
3284 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3286 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3287 under certain input conditions resulting in the execution of a shell for
3288 command substitution when the application did not request it. The
3289 implementation now checks WRDE_NOCMD immediately before executing the
3290 shell and returns the error WRDE_CMDSUB as expected.
3292 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3293 processing format strings with a large number of format specifiers.
3295 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3296 infinite loop if the DNS response contained a PTR record of an unexpected
3299 * The minimum GCC version that can be used to build this version of the GNU
3300 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3301 still be used to compile programs using the GNU C Library.
3303 * The GNU C Library is now built with -Werror by default. This can be
3304 disabled by configuring with --disable-werror.
3306 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3308 * The obsolete sigvec function has been removed. This was the original
3309 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3310 programs have been using instead for about 25 years. Of course, ABI
3311 compatibility for old binaries using sigvec remains intact.
3313 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3314 with newer versions of bison.
3316 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3317 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3318 registers overlay two consecutive single-precision registers. MIPS32R2
3319 introduced a new FPU mode (FR=1) where double-precision registers extend the
3320 corresponding single-precision registers which is incompatible with the
3321 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3322 require the use of FR=1 making a transition necessary. New o32 ABI
3323 extensions enable users to migrate over time from the original o32 ABI
3324 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3325 tracks the ABI of any loaded object and verifies that new objects are
3326 compatible. Mode transitions will also be requested as required and
3327 unsupportable objects will be rejected. The ABI checks include both soft and
3328 hard float ABIs for o32, n32 and n64.
3330 GCC 5 with GNU binutils 2.25 onwards:
3331 It is strongly recommended that all o32 system libraries are built using the
3332 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3333 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3334 compiler using --with-fp-32=xx to set this by default.
3338 * The following bugs are resolved with this release:
3340 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3341 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3342 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3343 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3344 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3345 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3346 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3347 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3348 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3349 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3350 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3351 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3352 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3353 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3354 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3356 * Reverted change of ABI data structures for s390 and s390x:
3357 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3358 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3359 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3360 are preserved pointing straight to the same implementation as the old ones.
3361 Given that, new callers will simply provide a too-big buffer to these
3362 functions. Any applications/libraries out there that embed jmp_buf or
3363 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3364 against 2.19 headers will have to rebuilt again. This is necessary in any
3365 case to revert the breakage in their ABI caused by the glibc change.
3367 * Support for file description locks is added to systems running the
3368 Linux kernel. The standard file locking interfaces are extended to
3369 operate on file descriptions, not file descriptors, via the use of
3370 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3371 are associated with an open file instead of a process.
3373 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3375 * The minimum Linux kernel version that this version of the GNU C Library
3376 can be used with is 2.6.32.
3378 * Running the testsuite no longer terminates as soon as a test fails.
3379 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3380 with PASS or FAIL lines for individual tests. A summary of the results is
3381 printed, including a list of failing lists, and "make check" exits with
3382 error status if there were any unexpected failures. "make check
3383 stop-on-test-failure=y" may be used to keep the old behavior.
3385 * The am33 port, which had not worked for several years, has been removed
3388 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3389 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3390 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3391 conflicted with POSIX (support for which was removed in 2.19), the
3392 interfaces those macros enabled remain available when compiling with
3393 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3394 test macros defined.
3396 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3398 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3399 This may improve lock scaling of existing programs on TX capable systems.
3400 The lock elision code is only built with --enable-lock-elision=yes and
3401 then requires a GCC version supporting the TX builtins. With lock elision
3402 default mutexes are elided via __builtin_tbegin, if the cpu supports
3403 transactions. By default lock elision is not enabled and the elision code
3406 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3407 copy the path argument. This allowed programs to cause posix_spawn to
3408 deference a dangling pointer, or use an unexpected pathname argument if
3409 the string was modified after the posix_spawn_file_actions_addopen
3412 * All supported architectures now use the main glibc sysdeps directory
3413 instead of some being in a separate "ports" directory (which was
3414 distributed separately before glibc 2.17).
3416 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3417 On configurations that support it (all Linux configurations), it's now
3418 used regardless of the --enable-add-ons switch to configure. It is no
3419 longer possible to build such configurations without pthreads support.
3421 * Locale names, including those obtained from environment variables (LANG
3422 and the LC_* variables), are more tightly checked for proper syntax.
3423 setlocale will now fail (with EINVAL) for locale names that are overly
3424 long, contain slashes without starting with a slash, or contain ".." path
3425 components. (CVE-2014-0475) Previously, some valid locale names were
3426 silently replaced with the "C" locale when running in AT_SECURE mode
3427 (e.g., in a SUID program). This is no longer necessary because of the
3430 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3431 with application code using Intel MPX instructions. (With all previous
3432 versions, the MPX register state could be clobbered when making calls
3433 into or out of a shared library.) Note that while the new dynamic
3434 linker is compatible with all known x86 hardware whether or not it
3435 supports Intel MPX, some x86 instruction-set emulators might fail to
3436 handle the new instruction encodings. This is known to affect Valgrind
3437 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3438 release), and might affect other tools that do instruction emulation.
3440 * Support for loadable gconv transliteration modules has been removed.
3441 The support for transliteration modules has been non-functional for
3442 over a decade, and the removal is prompted by security defects. The
3443 normal gconv conversion modules are still supported. Transliteration
3444 with //TRANSLIT is still possible, and the //IGNORE specifier
3445 continues to be supported. (CVE-2014-5119)
3447 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3448 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3449 resulting a denial-of-service security vulnerability in applications which
3450 use functions related to iconv. (CVE-2014-6040)
3454 * The following bugs are resolved with this release:
3456 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3457 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3458 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3459 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3460 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3461 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3462 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3463 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3464 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3465 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3466 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3467 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3468 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3469 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3470 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3471 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3472 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3473 16431, 16453, 16474, 16506, 16510, 16529
3475 * Slovenian translations for glibc messages have been contributed by the
3476 Translation Project's Slovenian team of translators.
3478 * The public headers no longer use __unused nor __block. This change is to
3479 support compiling programs that are derived from BSD sources and use
3480 __unused internally, and to support compiling with Clang's -fblock
3481 extension which uses __block.
3483 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3484 large collation sequences to optimize multiple passes. This cache
3485 computation may overflow for large collation sequences and may cause a
3486 stack or buffer overflow. This is now fixed to use a slower algorithm
3487 which does not use a cache if there is an integer overflow.
3489 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3490 rules for large collation sequences to optimize multiple passes and falls
3491 back to alloca if malloc fails, resulting in a possible stack overflow.
3492 The implementation now falls back to an uncached collation sequence lookup
3495 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3496 initialized for static applications resulting in the security feature
3497 being disabled. The pointer guard is now correctly initialized to a
3498 random value for static applications. Existing static applications need
3499 to be recompiled to take advantage of the fix (bug 15754).
3501 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3502 to the d_name member of struct dirent, or omit the terminating NUL
3503 character. (Bugzilla #14699).
3505 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3506 aligned_alloc functions could allocate too few bytes or corrupt the
3507 heap when passed very large allocation size values (Bugzilla #15855,
3510 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3511 for AF_INET6 has been fixed (Bugzilla #16072).
3513 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3514 pap_CW, quz_PE, the_NP.
3516 * Substantially revised locales: gd_GB, ht_HT
3518 * The LC_ADDRESS field was updated to support country_car for almost all
3521 * ISO 1427 definitions were updated.
3523 * ISO 3166 definitions were updated.
3525 * The localedef utility now supports --big-endian and --little-endian
3526 command-line options to generate locales for a different system from that
3527 for which the C library was built.
3529 * Binary locale files now only depend on the endianness of the system for
3530 which they are generated and not on other properties of that system. As a
3531 consequence, binary files generated with new localedef may be incompatible
3532 with old versions of the GNU C Library, and binary files generated with
3533 old localedef may be incompatible with this version of the GNU C Library,
3534 in the following circumstances:
3536 + Locale files may be incompatible on m68k systems.
3538 + Locale archive files (but not separate files for individual locales) may
3539 be incompatible on systems where plain "char" is signed.
3541 * The configure option --disable-versioning has been removed. Builds with
3542 --disable-versioning had not worked for several years.
3544 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3545 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3547 * SystemTap probes for malloc have been introduced.
3549 * SystemTap probes for slow multiple precision fallback paths of
3550 transcendental functions have been introduced.
3552 * Support for powerpc64le has been added.
3554 * The soft-float powerpc port now supports e500 processors.
3556 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3558 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3559 set of header declarations that are enabled by default, even when other
3560 feature test macros or compiler options such as -std=c99 would otherwise
3561 disable some of those declarations.
3563 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3564 conflict with POSIX. The libbsd-compat library (which was a dummy library
3565 that did nothing) has also been removed.
3567 * Preliminary documentation about Multi-Thread, Async-Signal and
3568 Async-Cancel Safety has been added.
3570 * Change of ABI data structures for s390 and s390x:
3571 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3572 allow for future hardware extensions. All library functions that accept or
3573 return these structures were versioned in order to provide backwards
3574 compatibility with existing code. However, not all cases can be handled
3575 with interface versioning. If an application embeds either structure into
3576 another structure and that structure is passed to another compilation unit
3577 which expects the newer larger-sized object then any access to the new
3578 fields will result in undefined behaviour. Similarly any access to fields
3579 that were moved by the enlarging of the structures will cause undefined
3580 behaviour. To fix the undefined behaviour all objects that are part of the
3581 final in-memory image must agree on the size of structures, and this may
3582 require recompilation.
3586 * The following bugs are resolved with this release:
3588 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3589 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3590 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3591 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3592 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3593 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3594 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3595 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3596 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3597 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3598 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3599 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3600 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3603 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3604 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3605 Distributions can re-enable building and using pt_chown via the new configure
3606 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3607 considerable security risks and should only be used if the distribution
3608 understands and accepts the risks.
3610 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3613 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3614 fixed (Bugzilla #15330).
3616 * Add support for calling C++11 thread_local object destructors on thread
3617 and program exit. This needs compiler support for offloading C++11
3618 destructor calls to glibc.
3620 * Improved worst case performance of libm functions with double inputs and
3623 * Support for priority inherited mutexes in pthread condition variables on
3624 non-x86 architectures.
3626 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3628 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3630 * Optimized string functions for ARM. Implemented by Will Newton and
3633 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3635 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3638 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3639 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3641 * Added a benchmark framework to track performance of functions in glibc.
3643 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3644 It is based on draft TS 18661 and currently enabled as a GNU extension.
3646 * On Linux, the clock function now uses the clock_gettime system call
3647 for improved precision, rather than old times system call.
3649 * Added support for version-3 tz format files. This is needed when using
3650 the tz database release 2013e or later, and affects a few unusual cases --
3651 currently only TZ='America/Godthab' for time stamps after 2037.
3653 * Added new API functions pthread_getattr_default_np and
3654 pthread_setattr_default_np to get and set the default pthread
3655 attributes of a process.
3657 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3658 This may improve lock scaling of existing programs on TSX capable systems.
3659 When the --enable-lock-elision=yes parameter is specified at configure
3660 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3663 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3664 availability). Implemented by Ryan S. Arnold.
3666 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3670 * The following bugs are resolved with this release:
3672 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3673 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3674 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3675 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3676 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3677 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3678 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3679 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3680 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3681 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3682 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3683 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3684 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3685 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3686 14879, 14889, 14893, 14898, 14914.
3688 * Optimization of memcpy for MIPS.
3690 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3691 EMFILE has been fixed (Bugzilla #14889).
3693 * The add-on ports collection is now distributed in the "ports" subdirectory
3694 of the main GNU C Library distribution, rather than separately.
3696 * Port to ARM AArch64 contributed by Linaro.
3698 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3699 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3701 Implemented by Andreas Krebbel.
3703 * The new function secure_getenv allows secure access to the environment,
3704 returning NULL if running in a SUID/SGID process. This function replaces
3705 the internal function __secure_getenv.
3707 * SystemTap static probes have been added into the dynamic linker.
3708 Implemented by Gary Benson.
3710 * Optimizations of string functions strstr, strcasestr and memmem.
3711 Implemented by Maxim Kuvyrkov.
3713 * The minimum Linux kernel version that this version of the GNU C Library
3714 can be used with is 2.6.16.
3716 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3717 powerpc POWER7. Implemented by Will Schmidt.
3719 * New configure option --disable-nscd builds the C library such that it
3720 never attempts to contact the Name Service Caching Daemon (nscd).
3721 New configure option --disable-build-nscd avoids building nscd itself;
3722 this is the default if --disable-nscd is used.
3724 * Improved support for cross-compilation, including cross-testing and
3725 bootstrap builds without a previously built glibc.
3727 * Several testsuite tests are now able to test multiple IFUNC variants of an
3728 interface, rather than just testing the one that would be chooen by
3731 * New configure options --with-bugurl and --with-pkgversion, for
3732 distributors to use to embed their bug-reporting and package version
3733 information in --help and --version output.
3735 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3736 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3737 allows creation of chroots without the procfs mounted on /proc.
3739 * The `crypt' function now fails if passed salt bytes that violate the
3740 specification for those values. On Linux, the `crypt' function will
3741 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3742 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3743 when the mode is enabled.
3745 * The `clock_*' suite of functions (declared in <time.h>) is now available
3746 directly in the main C library. Previously it was necessary to link with
3747 -lrt to use these functions. This change has the effect that a
3748 single-threaded program that uses a function such as `clock_gettime' (and
3749 is not linked with -lrt) will no longer implicitly load the pthreads
3750 library at runtime and so will not suffer the overheads associated with
3751 multi-thread support in other code such as the C++ runtime library.
3753 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3758 * The following bugs are resolved with this release:
3760 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3761 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3762 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3763 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3764 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3765 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3766 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3767 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3768 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3769 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3770 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3771 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3772 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3773 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3774 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3775 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3776 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3777 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3778 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3779 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3780 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3781 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3784 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3785 configuring glibc with:
3786 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3787 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3788 Implemented by H.J. Lu.
3792 + define static_assert
3794 + do not declare gets
3796 + declare at_quick_exit and quick_exit also for ISO C11
3798 + aligned_alloc. NB: The code is deliberately allows the size parameter
3799 to not be a multiple of the alignment. This is a moronic requirement
3800 in the standard but it is only a requirement on the caller, not the
3803 + timespec_get added
3805 + uchar.h support added
3807 + CMPLX, CMPLXF, CMPLXL added
3809 Implemented by Ulrich Drepper.
3811 * Support for the IA-64 has been moved to ports.
3813 * Remove support for anything but ELF binary format
3815 * Checking versions of poll, ppoll added.
3816 Implemented by Ulrich Drepper.
3818 * More generic and 64-bit performance optimizations to math functions.
3819 Implemented by Ulrich Drepper.
3821 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3822 headers and functions available at compile time as they were before
3823 version 2.14. This option will be removed at some time in the future
3824 after the TI-RPC library becomes fully sufficient for the needs of
3825 existing applications.
3827 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3828 Note that glibc is not expected to work with any Linux kernel version
3831 * New header <sys/auxv.h> and function getauxval allowing easy access to
3832 the AT_* key-value pairs passed from the Linux kernel. The header also
3833 defines the HWCAP_* bits associated with the AT_HWCAP key.
3835 * New locales: mag_IN
3837 * New configure option --enable-systemtap builds SystemTap static probes
3838 into libc for setjmp and longjmp and into libpthread for various operations.
3839 So far the setjmp/longjmp probes and some of the libpthread probes are
3840 provided only for i*86 and x86_64.
3841 Implemented by Roland McGrath and Rayson Ho.
3843 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3845 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3848 * More optimized functions for SPARC. Implemented by David S. Miller.
3850 * Improved support for cross-compilation, especially bootstrap builds
3851 without a previously built glibc.
3853 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3854 Chris Metcalf from Tilera.
3856 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3857 now supported for ARM processors.
3859 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3860 as the name of the dynamic linker, to distinguish it from the
3861 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3863 * Support for CRIS has been removed from ports.
3865 * A new class of installed header has been documented for low-level
3866 platform-specific functionality. PowerPC added the first instance with a
3867 function to provide time base register access. Contributed by Tulio
3868 Magno Quites Machado Filho.
3870 * ix86 configurations now install header files that are consistent with
3871 what x86-64 configurations install. These same header files can be used
3872 for -m32, -m64, or -mx32 builds.
3873 Contributed by H.J. Lu.
3875 * Math library bug fixes. A thorough audit of all open math library bugs was
3876 conducted by Joseph Myers. Significant progress was made on many math
3877 library bugs resulting in more accurate exceptions and function results.
3878 Many thanks to all those that contributed including Andreas Jaeger for his
3879 patch review and work on the x87 trigonometric instruction issues.
3881 * Timezone data is no longer installed. Timezone-related binaries and scripts
3882 will continue to be installed. Users should obtain their timezone data from
3883 their distribution provider or from the tzdata package at
3884 <ftp://munnari.oz.au/pub/>.
3888 * The following bugs are resolved with this release:
3890 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3891 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3892 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3893 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3894 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3895 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3896 13484, 13506, 13515, 13523, 13524, 13538, 13540
3898 * New program pldd to list loaded object of a process
3899 Implemented by Ulrich Drepper.
3901 * Add nss_db support back to glibc. No more dependency on Berkeley db
3902 and support for initgroups lookups.
3903 Implemented by Ulrich Drepper.
3905 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3906 Contributed by HJ Lu.
3908 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3909 Contributed by HJ Lu.
3911 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3912 on x86-32 and x86-64.
3913 Contributed by Liubov Dmitrieva.
3915 * Optimized strchr and strrchr for SSE on x86-32.
3916 Contributed by Liubov Dmitrieva.
3918 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3919 for x86-64 and x86-32.
3920 Contributed by Liubov Dmitrieva.
3922 * New interfaces: scandirat, scandirat64
3923 Implemented by Ulrich Drepper.
3925 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3926 Implemented by Ulrich Drepper.
3928 * nscd now also caches the netgroup database.
3929 Implemented by Ulrich Drepper.
3931 * Integrate libm with gcc's -ffinite-math-only option.
3932 Implemented by Ulrich Drepper.
3934 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3935 to math functions. Implemented by Ulrich Drepper.
3937 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3938 Implemented by Ulrich Drepper.
3940 * New Linux interfaces: process_vm_readv, process_vm_writev
3942 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3943 Implemented by Ulrich Drepper.
3945 * Optimized nearbyint and strcasecmp for PPC.
3946 Implemented by Adhemerval Zanella.
3948 * New locales: bho_IN, unm_US, es_CU, ta_LK
3952 * The following bugs are resolved with this release:
3954 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3955 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3956 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3957 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3958 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3959 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3960 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3961 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3962 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3963 12795, 12811, 12813, 12814, 12841
3965 * The RPC implementation in libc is obsoleted. Old programs keep working
3966 but new programs cannot be linked with the routines in libc anymore.
3967 Programs in need of RPC functionality must be linked against TI-RPC.
3968 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3970 Visible changes of this change include (obviously) the inability to link
3971 programs using RPC functions without referencing the TI-RPC library and the
3972 removal of the RPC headers from the glibc headers.
3973 Implemented by Ulrich Drepper.
3975 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3976 syncfs, setns, sendmmsg
3978 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3979 yue_HK, lij_IT, mhr_RU
3981 * New encodings: CP770, CP771, CP772, CP773, CP774
3983 * New program sotruss to trace calls through PLTs
3984 Implemented by Ulrich Drepper.
3986 * The malloc hook implementation is marked deprecated and will be removed
3987 from the default implementation in the next version. The design never
3988 worked ever since the introduction of threads. Even programs which do
3989 not create threads themselves can use multiple threads created internally.
3993 * The following bugs are resolved with this release:
3995 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3996 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3997 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3998 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
4001 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
4003 * POWER7 optimizations: memset, memcmp, strncmp
4005 * New optimized string functions for x86-64: strnlen (SSE2),
4006 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
4007 Implemented by Ulrich Drepper.
4011 * The following bugs are resolved with this release:
4013 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
4014 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
4015 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
4016 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
4017 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
4018 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
4019 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
4020 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
4022 * New interfaces: pthread_getname_np, pthread_setname_np
4024 * New Linux interface: recvmmsg
4026 * STT_GNU_IFUNC implemented for Sparc by David Miller.
4028 * The dynamic linker now recognizes supported ABI versions from the
4029 EI_ABIVERSION field in the ELF header.
4030 Implemented by Ulrich Drepper.
4032 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
4033 will not be used to fill in password fields in the passwd.byname replies.
4034 Instead it is used to synthesize the shadow.byname table, should it be
4035 missing. This is a useful mode in some installations involving Solaris.
4036 Implemented by Ulrich Drepper.
4038 * New locales: kok_IN, sq_MK, cv_RU
4042 * The following bugs are resolved with this release:
4044 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
4045 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
4046 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
4047 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
4048 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
4049 10789, 10817, 10823, 10840, 10847
4051 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
4053 Implemented by Ulrich Drepper.
4055 * Checking version of longjmp added that fails if an uninitialized stack
4056 frame would be created. Implemented by Ulrich Drepper.
4058 * STT_GNU_IFUNC is now supported in static executables.
4059 Implemented by H.J. Lu.
4061 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
4063 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
4064 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
4065 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
4066 Contributed by H.J. Lu.
4068 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
4069 Implemented by Ulrich Drepper.
4071 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
4073 Contributed by H.J. Lu.
4075 * Support for fma instruction in AVX on x86-64.
4076 Implemented by H.J. Lu and Ulrich Drepper.
4078 * AVX support in x86-64 auditing support in ld.so.
4079 Implemented by H.J. Lu.
4081 * STB_GNU_UNIQUE support added.
4082 Implemented by Ulrich Drepper.
4084 * Implement second fallback mode for optimized DNS lookup for even more
4085 broken environments. If two requests from the same port are not
4086 handled correctly close the socket and open a new one before sending
4087 the second request. The 'single-request-reopen' option in /etc/resolv.conf
4088 can be used to select this mode right away, instead of rediscovering the
4089 necessity is every process again.
4090 Implemented by Ulrich Drepper.
4092 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
4093 Implemented by Adam Tkac.
4095 * Optimized iconv conversions for S390x.
4096 Implemented by Andreas Krebbel.
4098 * Using condvars with PI mutexes is now more efficient due to kernel
4099 support for requeueing to PI futexes. NPTL support added for x86-64.
4100 Implemented by Ulrich Drepper.
4102 * New locales: ps_AF, my_MM
4106 * The following bugs are resolved with this release:
4108 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
4109 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
4110 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
4111 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
4112 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
4114 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
4115 Implemented by Ulrich Drepper.
4117 * New Linux interfaces: accept4, fallocate, fallocate64.
4118 Implemented by Ulrich Drepper.
4120 * Correct declarations of string function when used in C++ code. This
4121 could lead to compile errors for invalid C++ code.
4123 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
4126 * New POSIX 2008 interface: psiginfo
4127 Implemented by Ulrich Drepper.
4129 * New ISO C++1x interfaces: quick_exit, at_quick_exit
4130 Implemented by Ulrich Drepper.
4132 * Support for selecting between multiple function definitions at runtime
4133 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
4135 * The libcrypt library can now use the hash function implementations in
4136 NSS. Implemented by Ulrich Drepper.
4138 * The malloc implementation can be compiled to be less memory efficient
4139 but higher performing in multi-threaded programs.
4140 Implemented by Ulrich Drepper.
4142 * New locales: nan_TW@latin, ks_IN
4144 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4145 Implemented by Ulrich Drepper.
4147 * Extended printf hook support. It is possible to use user-defined types
4148 and extend existing format specifiers.
4149 Implemented by Ulrich Drepper.
4151 * Handling for group shadow files has been added.
4152 Implemented by Ulrich Drepper.
4154 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4155 servers (the case, e.g., for some people using the built-in DNS
4156 server in ADSL modems/routers). There is a once-per-process timeout
4157 in case of a broken server. To avoid it, users can run nscd or put
4158 'options single-request' in /etc/resolv.conf.
4159 Implemented by Ulrich Drepper.
4163 * The following bugs are resolved with this release:
4165 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4166 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4167 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4168 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4169 6968, 6974, 6980, 6995, 7008, 7009, 7029
4171 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4172 up at the same time. Implemented by Ulrich Drepper.
4174 * TLS descriptors for LD and GD on x86 and x86-64.
4175 Implemented by Alexandre Oliva.
4177 * getaddrinfo now handles DCCP and UDPlite.
4178 Implemented by Ulrich Drepper.
4180 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4181 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4182 Implemented by Ulrich Drepper.
4184 * New implementation of memmem, strstr, and strcasestr which is O(n).
4185 Implemented by Eric Blake.
4187 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4189 * Implement "e" option for popen to open file descriptor with the
4190 close-on-exec flag set. Implemented by Ulrich Drepper.
4192 * Implement "b" mode for fmemopen. In this mode writes writes don't
4193 implicitly add a NUL byte and seeks from the end of the buffer really
4194 use the buffer end, not the string length as the basis.
4195 Implemented by Ulrich Drepper.
4197 * Many functions, exported and internal, now atomically set the close-on-exec
4198 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4200 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4202 Implemented by Pravin Satpute.
4204 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4208 * The following bugs are resolved with this release:
4210 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4211 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4212 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4213 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4214 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4215 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4216 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4218 * New locales: bo_CN, bo_IN, shs_CA.
4220 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4222 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4223 Implemented by Pravin Satpute.
4225 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4227 * nscd caches now all timeouts for DNS entries
4228 Implemented by Ulrich Drepper.
4230 * nscd is more efficient and wakes up less often.
4231 Implemented by Ulrich Drepper.
4233 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4234 vdprintf, and obstack_vprintf.
4235 Implemented by Jakub Jelinek.
4237 * Faster memset for x86-64.
4238 Implemented by Harsha Jagasia and H.J. Lu.
4240 * Faster memcpy on x86.
4241 Implemented by Ulrich Drepper.
4243 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4244 Implemented by Ulrich Drepper.
4246 * Faster sqrt and sqrtf implemention for some PPC variants.
4247 Implemented by Steven Munroe.
4251 * The following bugs are resolved with this release:
4253 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4254 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4255 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4256 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4257 5071, 5103, 5104, 5112, 5113, 5184, 5186
4259 * More checking functions: fread, fread_unlocked, open*, mq_open.
4260 Implemented by Jakub Jelinek and Ulrich Drepper.
4262 * Extend fortification to C++. Implemented by Jakub Jelinek.
4264 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4265 by not recognizing 'a' as a modifier when those specs are requested.
4266 Implemented by Jakub Jelinek.
4268 * PPC optimizations to math and string functions.
4269 Implemented by Steven Munroe.
4271 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4272 options to be passed. Implemented by Ulrich Drepper.
4274 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4276 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4277 Implemented by Ulrich Drepper.
4279 * Handle private futexes in the NPTL implementation.
4280 Implemented by Jakub Jelinek and Ulrich Drepper.
4282 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4283 Implemented by Roland McGrath and Ulrich Drepper.
4285 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4287 * SHA-256 and SHA-512 based password encryption.
4288 Implemented by Ulrich Drepper.
4290 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4291 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4294 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4295 Implemented by Ulrich Drepper.
4299 * The following bugs are resolved with this release:
4301 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4302 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4303 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4304 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4305 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4306 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4307 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4310 * New Linux interfaces: epoll_pwait, sched_getcpu.
4312 * New generic interfaces: strerror_l.
4314 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4318 * The following bugs are resolved with this release:
4320 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4321 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4322 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4323 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4324 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4325 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4326 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4327 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4328 3225, 3251, 3252, 3253, 3273
4330 * For Linux, the sorting of addresses returned by getaddrinfo now also
4331 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4332 Implemented by Ulrich Drepper.
4334 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4335 Implemented by Ulrich Drepper.
4337 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4339 * New iconv module for MIK. Contributed by Alexander Shopov.
4341 * For sites with broken group and/or passwd database, the auto-propagate
4342 option of nscd can prevent creating ID lookup entries from the results
4343 of a name lookup and vice versa. This usually is no problem but some
4344 site might have problems with the default behavior.
4345 Implemented by Ulrich Drepper.
4347 * Iterating over entire database in NIS can be slow. With the
4348 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4349 to trade time for memory. The entire database will be read at once.
4350 Implemented by Ulrich Drepper.
4352 * The interfaces introduced in RFC 3542 have been implemented by
4355 * Support for the new ELF hash table format was added by Ulrich Drepper.
4357 * Support for priority inheritance mutexes added by Jakub Jelinek and
4360 * Support for priority protected mutexes added by Jakub Jelinek.
4362 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4363 or_IN, csb_PL, fy_NL, sr_ME.
4367 * More overflow detection functions.
4369 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4370 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4372 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4373 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4374 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4375 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4376 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4377 by Masahide Washizawa.
4379 * It is now possible to install audit libraries for the dynamic linker using
4380 LD_AUDIT. Implemented by Ulrich Drepper.
4382 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4383 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4384 For a libc and libpthread that works well on Linux 2.4 kernels, we
4385 recommend using the stable 2.3 branch.
4387 * The new function open_wmemstream acts like open_memstream,
4388 but uses a wchar_t wide character buffer.
4390 * The new function ppoll is an improved version of poll, similar to pselect.
4392 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4393 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4394 renameat, unlinkat, linkat, symlinkat, readlinkat.
4396 * New Linux kernel system calls: unshare,
4397 inotify_init, inotify_add_watch, inotify_rm_watch.
4399 * The euidaccess function is now also known by the alias eaccess,
4400 for compatibility with some other systems.
4402 * Timezone data updated to 2006b version.
4406 * The following bugs are resolved with this release:
4408 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4409 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4410 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4411 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4412 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4413 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4415 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4417 * As of this release, GCC 4 can be used to compile the C Library.
4419 * Timezone data updated to 2005m version.
4423 * The following bugs are resolved with this release:
4425 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4426 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4427 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4428 777, 787, 821, 822, 823, 825
4430 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4434 * Support for RFC 3678. Real implementations exist only for Linux so far.
4435 Implemented by Ulrich Drepper.
4437 * nscd can now cache entries persistently. Expiring entries are reloaded.
4438 For speedups the cache can be shared in memory with client processes.
4439 Implemented by Ulrich Drepper.
4441 * nscd can now perform SELinux checks.
4442 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4444 * getaddrinfo queries are now cached. Canonical name lookup is performed
4446 Implemented by Ulrich Drepper.
4448 * The nothrow function attribute is used when headers are used by gcc when
4449 compiling C code. This can avoid significant amounts of exception
4452 * The malloc functions perform more error checking and are stricter when
4453 it comes to reacting on errors. The default action is to terminate
4454 the process after showing an error message. Implemented by Ulrich Drepper.
4456 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4457 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4459 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4460 namespaces using the new function dlmopen(). This feature is of course,
4461 like most other dynamic loading functionality, not available in statically
4462 linked applications. Implemented by Ulrich Drepper.
4464 * Low-overhead boundary checking variants of string and some stdio functions
4465 were added. These are to be used in conjunction with a gcc patch by
4466 Jakub Jelinek which adds calls to these functions if possible.
4467 Implemented by Jakub Jelinek and Ulrich Drepper.
4469 * Old code for several operating systems and machine architectures that
4470 have not been in working condition in a long time have been removed from
4471 the main source tree maintained by the GNU C Library's maintainers.
4472 These files are now reside in the separate `ports' source module
4473 that is usable as an add-on when building the library.
4477 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4478 interrogate the dynamic linker, compatible with the Solaris interface.
4480 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4481 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4483 * getifaddrs now uses the netlink interface on Linux to get its information.
4484 Implemented by Thorsten Kukuk.
4486 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4487 Implemented by Ulrich Drepper.
4489 * support for non-executable stacks on x86 has been added. Changes mostly
4492 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4495 * getaddrinfo now performs destination address selection according to
4500 * Thread-safe interfaces for many functions that access locale data
4501 were added in version 2.3, but these features were omitted from NEWS.
4502 Many functions have variants with an `_l' suffix that take a `locale_t'
4503 object as a parameter rather than consulting the current locale.
4504 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4505 create and maintain `locale_t' objects. Additionally, the new function
4506 `uselocale' sets "the current locale" (as used by functions not so
4507 parameterized) set for an individual thread. These features were added
4508 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4510 * The functions getresuid, getresgid, setresuid, and setresgid, which
4511 have long been available on Linux, are now declared in <unistd.h>
4512 and are now also available on the Hurd.
4514 * ELF thread-local storage support (TLS) now works on x86-64.
4516 * The new dynamic string token $LIB is expanded in shared library names.
4517 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4519 * Aldy Hernandez contributed complete software floating point support for
4520 PowerPC machines with no FPU.
4522 * fexecve is implemented on Linux.
4524 * The `btowc' function should work at least twice as fast due to
4525 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4527 * With approriate thread add-ons cancelable functions are now implemented
4528 in libc.so as well. No need to call the function in libpthread. This
4529 change allowed to finally disable the incorrect and expensive handling
4530 of weak definition in ld.so.
4532 * Yet more PLT entries in libc.so have been removed. We finally arrived
4533 at the bare minimum. Startup times improved appropriately.
4535 * Support for the new Linux/x86 system call interface was added. The
4536 AT_SYSINFO auxiliary vector entry is recognized and handled.
4540 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4543 * iconv (the program and the interface) now accepts empty names (excluding
4544 options like //TRANSLIT) to mean "use charset of current locale".
4546 * localedef can now transliterate characters in strings which are not in
4547 the provided charmap. The information from the input locale is used.
4549 * Prelinking support was added for ELF targets. This requires additional
4550 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4552 * Read-only stdio streams now use mmap to speed up operation by eliminating
4553 copying and buffer underflows. To use add 'm' to the mode string of
4554 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4556 * The malloc functions were completely rewritten by Wolfram Gloger based
4557 on Doug Lea's malloc-2.7.0.c.
4559 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4560 implementation of regex.
4562 * Bruno Haible upgraded the iconv and locale implementation to support
4565 * Contents of the LC_* and LANG environment variables in the CEN style are
4566 not recognized anymore. It never was used. Change by Ulrich Drepper.
4568 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4569 thread-local storage (TLS) ABI on some platforms.
4570 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4572 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4573 EUC-JISX0213, and TSCII.
4575 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4576 BSD-compatible interface for getting all network interface addresses.
4577 Implementation for IPv4 by Roland McGrath.
4579 * Loading of locale data is faster due to the introduction of a locale
4580 archive. Implemented by Roland McGrath and Ulrich Drepper.
4582 * Startup times are significantly reduced by not using exported functions
4583 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4586 * Steven Munroe contributed a port to PowerPC64/Linux.
4590 * The Hurd now uses the GNU libio implementation of stdio rather than the
4591 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4593 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4594 with the same behavior as the Linux system call of the same name.
4598 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4599 128-bit long double format.
4601 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4602 IBM1161, and IBM1162 charsets.
4604 * Andreas Jaeger contributed a port to x86-64/Linux.
4606 * Peter Bruin contributed a port to PowerPC/Hurd.
4608 * libc functions using I/O streams now can handle wide-oriented streams
4611 * optimizations in the dynamic linker. Binaries created by recent binutils
4612 versions start up quicker due to reduced time spent on relocations.
4614 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4618 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4619 asinh, atanh, j0 for the 128-bit long double format.
4621 * Bruno Haible updated all the code handling Unicode in some form to
4622 support Unicode 3.1.
4624 * Speed of regex for single-byte locales is back to previous levels.
4625 Patch by Isamu Hasegawa.
4627 * Alpha, SPARC, and IA-64 now also using floating stacks.
4629 * Startup time of internationalized applications greatly improved through
4630 iconv cache. Use iconvconfig to generate the cache file.
4631 Contributed by Ulrich Drepper.
4633 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4634 severe performance problems. Patch by David Mosberger.
4636 * The Hurd port got a lot more functionality like AIO, various stdio
4637 extensions, etc. Mainly done by Roland McGrath.
4639 * mtrace can now lookup symbols in shared libraries.
4643 * Intel's IA-64 math library is largely integrated. It provides fast and
4644 accurate implementatations for most basic and standard math functions
4645 in float, double, and long double format.
4647 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4648 and asin for the 96-bit long double format and asin, log, tan for the
4649 128-bit long double format.
4651 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4652 The basic double functions exist today. Contributed by Abraham Ziv
4653 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4654 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4656 * An asynchronous name lookup library was added. The interface is designed
4657 after POSIX AIO. The proposal was circulated beforehand to get comments.
4658 No negative ones came in. Implemented by Ulrich Drepper.
4660 * Port to S390/64bit contributed by Martin Schwidefsky
4661 <schwidefsky@de.ibm.com>.
4663 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4664 of functions for Linux/IA-64.
4666 * The RPC code is now thread safe. Threads can now use the same service
4667 of different services at the same time. Patch by Eric Norum
4668 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4670 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4671 family of functions for Linux/S390.
4673 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4674 of functions for Linux/x86.
4676 * Port to Linux/CRIS contributed by Axis Communications.
4680 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4681 we can now check for namespace violations and missing declarations. The
4682 result is that almost all headers are now Unix-compliant (as defined in
4683 the upcoming XPG6). The negative side is that some programs might need
4684 corrections, too, if they depend on the incorrect form of the headers in
4685 previous versions which defined too many symbols and included too many
4688 * regex now handles multibyte character sets correctly.
4689 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4691 * iconv (the program) does now conform to the upcoming XPG6 and handles
4692 charmaps. Instead of the charset names the path of charmaps can be
4693 provided and the conversion happens based on this data.
4694 Contributed by Ulrich Drepper.
4696 * The locale program now provides detailed information about the installed
4701 only lists the names of the supported locales
4705 provides details such as country, language, and codeset name.
4706 Contributed by Ulrich Drepper.
4710 * The gencat program now parses the input file according to the charset
4711 selected by the LC_CTYPE category. This is important for stateful
4712 character sets. To make generating catalogs easier there is a way
4713 to overwrite the charset selected by the locale: before the first
4714 message or $ quote line the catalog can contain a line like
4716 $ codeset=ISO-8859-2
4718 to select the charset (ISO-8859-2 in this case).
4720 Implemented by Shinya Hanataka and Ulrich Drepper.
4722 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4723 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4724 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4726 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4727 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4729 * The LANGUAGE environment variable is now ignored unless the locale is
4730 changed from the default "C" locale.
4732 * The usual bug fixes.
4736 * Greg McGary added runtime support for bounds checking using gcc's
4737 new -fbounded-pointers option. ix86 target is complete. PowerPC
4740 * Thorsten Kukuk added secure mode support to nscd.
4742 * The Berkeley db libraries have been removed.
4744 Related, the nss_db module is now in a separate package since it
4745 obviously requires a database library being available.
4747 * Wide character I/O streams implemented by Ulrich Drepper.
4749 * Functions from the extended socket API added by Ulrich Drepper.
4751 * Functions feenableexcept and fedisableexcept to control the
4752 behaviour of individual exceptions have been added by Andreas Jaeger.
4754 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4756 * The resolver code has been updated from bind 8.2.3-T5B which supports
4757 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4760 This change could in some situations effect backward compatibility. Since
4761 now `_res' is a thread-local instead of a global variable, modifying it
4762 in one thread does not have any effect in other threads.
4764 The resolver library was also extended to allow IPv6 as the transport
4765 protocol for the requests. This work was done by Stig Venaas.
4767 * Compatibility code for K&R C compilers has been removed from the
4768 header files. A ISO C compiler is needed to use the library
4769 (conforming to either C89 or C99 standard).
4771 * Complete rewrite of the localedef program to support multibyte character
4772 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4773 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4774 Implemented by Ulrich Drepper.
4776 Bruno Haible significantly improved the generation and use of the data
4777 structures for the wide character tables.
4779 * Plural handling in gettext implemented by Ulrich Drepper.
4781 * The utmp daemon has been removed.
4783 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4785 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4788 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4790 * POSIX barriers implemented by Kaz Kylheku.
4792 * POSIX spawn function family implemented by Ulrich Drepper.
4794 * POSIX spinlocks are now available.
4796 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4798 * the configure option --enable-kernel=X.Y.Z allows to strip out
4799 compatibility for kernel versions before X.Y.Z. This is currently only
4800 implemented for Linux.
4802 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4803 field sin6_scope_id. This means that all programs using IPv6 should be
4804 recompiled. Don't expect binary compatibility with previous glibc
4807 * various conversion modules for IBM character sets contributed by
4810 * IA-64 port by Jes Sorensen and HJ Lu.
4824 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4826 * New xdr functions are added; some rpc functions are now 64bit clean.
4828 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4830 * Fixed known incompatibilities with glibc 2.0.
4832 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4834 * Optimized a number of functions (especially the ELF dynamic loader).
4836 * Update timezone data files.
4838 * lots of charmaps corrections
4840 * some new locale definitions and charmaps
4845 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4846 conform to POSIX member type requirements. Symbol versions have been
4847 adjusted as needed within the library, and for direct use by applications,
4848 but there is potential for problems if third-party libraries use
4849 struct timeval as part of their interface. This does not present
4850 a problem for X and other "essential" system libraries.
4852 * An additional locale model to support C++ Standard Library locale
4853 model and probably more was implemented by Ulrich Drepper.
4855 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4858 * Miles Bader provided the `argp' function family to support hierachical
4859 command line argument parsing, layered on top of getopt.
4861 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4863 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4866 * scanf recognizes the %a and %A format for scanning floating point numbers.
4868 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4869 information and interfaces for the available integer types.
4871 * about 130 new math functions were added to implement the ISO C9x math
4874 * the new header <complex.h> contains definitions of the complex math
4875 functions from ISO C 9X.
4877 * the new header <tgmath.h> defines generic macros to use complex or
4878 real valued functions.
4880 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4882 * Andreas Jaeger provided a test suite for the math library.
4884 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4886 * Ulrich Drepper added character set conversion functions (iconv).
4888 * Optimized string functions have been added.
4890 * The localedata addon is now part of glibc.
4892 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4894 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4895 daemon for NSS (nscd).
4897 Missing a better place here are some numbers on improvements. Under
4898 Linux 2.1.125 un-tar-ing the kernel sources takes
4902 using local files 12.19s 6.88s 22.91s
4904 using NIS 13.92s 8.91s 26.34s
4906 using NIS & nscd 10.37s 7.34s 25.30s
4908 using NIS+ 27.57s 30.37s 640.46s
4910 using NIS+ & nscd 10.25s 7.83s 26.51s
4912 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4914 Keep in mind that non-namelookup related operations dominate above times.
4915 It was just a common complain that using NIS+ unpacking the kernel is
4918 [1] The old nscd implementation is not available anymore since it was
4919 distributed with glibc up to version 2.0.98 and thus is now replaced.
4921 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4923 * Mark Kettenis provided a Hesiod NSS module.
4925 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4926 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4928 * rcmd can now handle netgroups (Dick Streefland).
4930 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4933 * Support for the IPv6 protocol has been added to the socket API, as per the
4934 latest draft standards.
4936 * Support for Linux 2.2 has been added.
4938 * Interface changes relative to the latest 2.0.x release:
4939 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4940 addseverity NEW: Unix98
4941 alphasort64 NEW: LFS
4942 argp_err_exit_status NEW: argp, GNU ext
4943 argp_error NEW: argp, GNU ext
4944 argp_failure NEW: argp, GNU ext
4945 argp_help NEW: argp, GNU ext
4946 argp_parse NEW: argp, GNU ext
4947 argp_program_bug_address NEW: argp, GNU ext
4948 argp_program_version NEW: argp, GNU ext
4949 argp_program_version_hook NEW: argp, GNU ext
4950 argp_state_help NEW: argp, GNU ext
4951 argp_usage NEW: argp, GNU ext
4952 authdes_create NEW: Secure RPC
4953 authdes_getucred NEW: Secure RPC
4954 authdes_pk_create NEW: Secure RPC
4955 backtrace NEW: GNU ext.
4956 backtrace_symbols NEW: GNU ext.
4957 backtrace_symbols_fd NEW: GNU ext.
4959 cacosf NEW: ISO C 9x
4960 cacosh NEW: ISO C 9x
4961 cacoshf NEW: ISO C 9x
4962 cacoshl NEW: ISO C 9x
4963 cacosl NEW: ISO C 9x
4970 casinf NEW: ISO C 9x
4971 casinh NEW: ISO C 9x
4972 casinhf NEW: ISO C 9x
4973 casinhl NEW: ISO C 9x
4974 casinl NEW: ISO C 9x
4976 catanf NEW: ISO C 9x
4977 catanh NEW: ISO C 9x
4978 catanhf NEW: ISO C 9x
4979 catanhl NEW: ISO C 9x
4980 catanl NEW: ISO C 9x
4981 cbc_crypt NEW: Secure RPC
4985 ccoshf NEW: ISO C 9x
4986 ccoshl NEW: ISO C 9x
4992 cimagf NEW: ISO C 9x
4993 cimagl NEW: ISO C 9x
4994 clearerr_locked REMOVED
4995 clntunix_create NEW: sunrpc ext
4997 clog10 NEW: ISO C 9x
4998 clog10f NEW: ISO C 9x
4999 clog10l NEW: ISO C 9x
5009 cprojf NEW: ISO C 9x
5010 cprojl NEW: ISO C 9x
5012 crealf NEW: ISO C 9x
5013 creall NEW: ISO C 9x
5018 csinhf NEW: ISO C 9x
5019 csinhl NEW: ISO C 9x
5022 csqrtf NEW: ISO C 9x
5023 csqrtl NEW: ISO C 9x
5027 ctanhf NEW: ISO C 9x
5028 ctanhl NEW: ISO C 9x
5030 des_setparity NEW: Secure RPC
5031 ecb_crypt NEW: Secure RPC
5032 endutxent NEW: Unix98
5034 exp10f NEW: ISO C 9x
5035 exp10l NEW: ISO C 9x
5039 fattach NEW: STREAMS
5040 fdetach NEW: STREAMS
5044 feclearexcept NEW: ISO C 9x
5045 fegetenv NEW: ISO C 9x
5046 fegetexceptflag NEW: ISO C 9x
5047 fegetround NEW: ISO C 9x
5048 feholdexcept NEW: ISO C 9x
5050 feraiseexcept NEW: ISO C 9x
5051 ferror_locked REMOVED
5052 fesetenv NEW: ISO C 9x
5053 fesetexceptflag NEW: ISO C 9x
5054 fesetround NEW: ISO C 9x
5055 fetestexcept NEW: ISO C 9x
5056 feupdateenv NEW: ISO C 9x
5057 fflush_locked REMOVED
5061 fgets_unlocked NEW: GNU ext.
5062 fileno_locked REMOVED
5074 fputc_locked REMOVED
5075 fputs_unlocked NEW: GNU ext.
5076 fread_unlocked NEW: GNU ext.
5081 fstatvfs NEW: Unix98
5085 ftruncate64 NEW: LFS
5087 fwrite_unlocked NEW: GNU ext.
5088 gai_strerror NEW: IPv6
5092 getchar_locked REMOVED
5094 getdate_err NEW: Unix98
5095 getdate_r NEW: GNU ext.
5097 getnameinfo NEW: IPv6
5098 getnetname NEW: Secure RPC
5099 getpmsg NEW: STREAMS
5100 getpt NEW: Unix98 PTY
5101 getrlimit64 NEW: LFS
5102 getutxent NEW: Unix98
5103 getutxid NEW: Unix98
5104 getutxline NEW: Unix98
5105 glob64 NEW: GNU ext.
5106 globfree64 NEW: GNU ext.
5107 gnu_get_libc_release NEW: GNU ext.
5108 gnu_get_libc_version NEW: GNU ext.
5109 grantpt NEW: Unix98 PTY
5110 host2netname NEW: Secure RPC
5112 iconv_close NEW: iconv
5113 iconv_open NEW: iconv
5114 if_freenameindex NEW: IPv6
5115 if_indextoname NEW: IPv6
5116 if_nameindex NEW: IPv6
5117 if_nametoindex NEW: IPv6
5118 in6addr_any NEW: IPv6
5119 in6addr_loopback NEW: IPv6
5120 inet6_isipv4mapped NEW: IPv6
5121 isastream NEW: STREAMS
5122 iswblank NEW: GNU ext.
5123 key_decryptsession NEW: Secure RPC
5124 key_decryptsession_pk NEW: Secure RPC
5125 key_encryptsession NEW: Secure RPC
5126 key_encryptsession_pk NEW: Secure RPC
5127 key_gendes NEW: Secure RPC
5128 key_get_conv NEW: Secure RPC
5129 key_secretkey_is_set NEW: Secure RPC
5130 key_setnet NEW: Secure RPC
5131 key_setsecret NEW: Secure RPC
5132 llrint NEW: ISO C 9x
5133 llrintf NEW: ISO C 9x
5134 llrintl NEW: ISO C 9x
5135 llround NEW: ISO C 9x
5136 llroundf NEW: ISO C 9x
5137 llroundl NEW: ISO C 9x
5142 lrintf NEW: ISO C 9x
5143 lrintl NEW: ISO C 9x
5144 lround NEW: ISO C 9x
5145 lroundf NEW: ISO C 9x
5146 lroundl NEW: ISO C 9x
5148 makecontext NEW: Unix98
5149 mempcpy NEW: GNU ext.
5152 modify_ldt NEW: kernel
5156 nearbyint NEW: ISO C 9x
5157 nearbyintf NEW: ISO C 9x
5158 nearbyintl NEW: ISO C 9x
5159 netname2host NEW: Secure RPC
5160 netname2user NEW: Secure RPC
5161 nexttoward NEW: ISO C 9x
5162 nexttowardf NEW: ISO C 9x
5163 nexttowardl NEW: ISO C 9x
5167 passwd2des NEW: Secure RPC
5169 pow10f NEW: GNU ext.
5170 pow10l NEW: GNU ext.
5173 printf_size NEW: GNU ext.
5174 printf_size_info NEW: GNU ext.
5175 profil_counter REMOVED
5176 pthread_mutexattr_getkind_np REPLACED
5177 pthread_mutexattr_setkind_np REPLACED
5178 ptsname NEW: Unix98 PTY
5179 ptsname_r NEW: Unix98 PTY
5181 putchar_locked REMOVED
5182 putgrent NEW: GNU ext.
5184 putpmsg NEW: STREAMS
5185 pututxline NEW: Unix98
5189 readdir64_r NEW: LFS
5190 remquo NEW: ISO C 9x
5191 remquof NEW: ISO C 9x
5192 remquol NEW: ISO C 9x
5194 roundf NEW: ISO C 9x
5195 roundl NEW: ISO C 9x
5197 scalbln NEW: ISO C 9x
5198 scalblnf NEW: ISO C 9x
5199 scalblnl NEW: ISO C 9x
5201 sendfile NEW: kernel
5202 setcontext NEW: Unix98
5203 setrlimit64 NEW: LFS
5204 setutxent NEW: Unix98
5206 sigignore NEW: Unix98
5207 sigqueue NEW: POSIX.1b
5208 sigrelse NEW: Unix98
5209 sigset NEW: POSIX.1b
5210 sigtimedwait NEW: POSIX.1b
5211 sigwaitinfo NEW: POSIX.1b
5212 sincos NEW: GNU ext.
5213 sincosf NEW: GNU ext.
5214 sincosl NEW: GNU ext.
5218 strcasestr NEW: GNU ext.
5219 strtoimax NEW: ISO C 9x
5220 strtoumax NEW: ISO C 9x
5221 strverscmp NEW: GNU ext.
5222 svcauthdes_stats NEW: Secure RPC
5223 svcunix_create NEW: sunrpc etx
5224 svcunixfd_create NEW: sunrpc ext
5225 swapcontext NEW: Unix98
5226 tcgetsid NEW: Unix98 PTY
5227 tdestroy NEW: GNU ext.
5228 tgamma NEW: ISO C 9x
5229 tgammaf NEW: ISO C 9x
5230 tgammal NEW: ISO C 9x
5234 truncf NEW: ISO C 9x
5235 truncl NEW: ISO C 9x
5237 unlockpt NEW: Unix98 PTY
5238 updwtmpx NEW: Unix98
5239 user2netname NEW: Secure RPC
5240 utmpxname NEW: Unix98
5241 versionsort NEW: GNU ext.
5242 versionsort64 NEW: GNU ext.
5244 wcscasecmp NEW: GNU ext.
5245 wcsncasecmp NEW: GNU ext.
5246 wcsnlen NEW: GNU ext.
5247 wcstoimax NEW: ISO C 9x
5248 wcstoll NEW: ISO C 9x
5249 wcstoull NEW: ISO C 9x
5250 wcstoumax NEW: ISO C 9x
5252 wordexp NEW: POSIX.2
5253 wordfree NEW: POSIX.2
5254 write_profiling REMOVED
5255 xdecrypt NEW: Secure RPC
5256 xdr_authdes_cred NEW: Secure RPC
5257 xdr_authdes_verf NEW: Secure RPC
5258 xdr_cryptkeyarg NEW: Secure RPC
5259 xdr_cryptkeyarg2 NEW: Secure RPC
5260 xdr_cryptkeyres NEW: Secure RPC
5261 xdr_getcredres NEW: Secure RPC
5262 xdr_key_netstarg NEW: Secure RPC
5263 xdr_key_netstres NEW: Secure RPC
5264 xdr_keybuf NEW: Secure RPC
5265 xdr_keystatus NEW: Secure RPC
5266 xdr_netnamestr NEW: Secure RPC
5267 xdr_sizeof NEW: Secure RPC
5268 xdr_unixcred NEW: sunrpc ext
5269 xencrypt NEW: Secure RPC
5270 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5281 * inet_ntoa is thread-safe
5283 * updwtmp is moved from libutil to libc
5285 * rewrite of cbrt function
5287 * update of timezone data
5301 * add atoll function
5303 * fix complex problems in Berkeley DB code
5305 * fix math functions
5309 * fixed lots of header problems (especially Linux/GNU specific)
5311 * dynamic loader preserves all registers
5313 * Roland McGrath provided support for handling of auxiliary objects in
5314 the ELF dynamic loader.
5316 * support for parallel builds is improved
5320 * GNU extensions are no longer declared by default. To enable them you
5321 must define the macro `_GNU_SOURCE' in your program or compile with
5324 * The library has changed from using GNU ld symbol aliases to using weak
5325 symbols where available. The ELF object file format supports weak
5326 symbols; GNU ld also supports weak symbols in the a.out format. (There
5327 is also now support for other GNU ld extensions in ELF. Use the
5328 `--with-elf' option to configure to indicate you have ELF, and
5329 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5330 of many files which contained only symbol aliases, reducing the size of
5331 the source and the compiled library; many other files were renamed to
5332 less cryptic names previously occupied by the symbol alias files.
5333 There is a new header file <elf.h> for programs which operate on
5334 files in the ELF format.
5336 * Converted to Autoconf version 2, so `configure' has more options.
5337 Run `configure --help' to see the details.
5339 * The library can now be configured to build profiling, highly-optimized
5340 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5341 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5342 `configure' enable building these extra libraries. The shared library is
5343 built by default when using both ELF and GNU ld. When shared libraries
5344 are enabled, the new library `-ldl' is available for arbitrary run-time
5345 loading of shared objects; its interface is defined in <dlfcn.h>. The
5346 new header file <link.h> gives access to the internals of the run-time
5347 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5348 application of same name on other systems and it provides information
5349 about dynamically linked binaries.
5351 * The C library now provides the run-time support code for profiling
5352 executables compiled with `-pg'. Programs can control the profiling code
5353 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5354 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5355 the support for this file format was contributed by David Mosberger-Tang.
5357 * The math code has been replaced with a math library based on fdlibm from
5358 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5359 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5360 functions. The math functions now reside in a separate library, so
5361 programs using them will need to use `-lm' their linking commands.
5363 * John C. Bowman contributed optimized ix87 assembler inline functions.
5365 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5366 mechanism similar to that found in Solaris 2. This is now used for the
5367 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5368 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5369 file controls what services are used for each individual database. This
5370 works by loading shared libraries with names specified in `nsswitch.conf',
5371 so service modules can be changed or added at any time without even
5372 relinking any program. Currently there are the file, db, and NIS based
5373 NSS services available.
5375 * The new functions `strtoq' and `strtouq' parse integer values from
5376 strings, like `strtol' and `strtoul', but they return `long long int' and
5377 `unsigned long long int' values, respectively (64-bit quantities).
5379 * The new functions `strtof' and `strtold' parse floating-point values from
5380 strings, like `strtod', but they return `float' and `long double' values,
5381 respectively (on some machines `double' and `long double' are the same).
5383 * Ulrich Drepper has contributed new implementations of the floating-point
5384 printing and reading code used in the `printf' family of functions and
5385 `strtod', `strtof', and `strtold'. These new functions are perfectly
5386 accurate, and much faster than the old ones.
5388 * The implementation of the POSIX locale model was completely rewritten by
5389 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5390 to compile the POSIX locale definition.
5392 * The former dummy implementations of the strcoll and strxfrm function are
5393 now replaced by fully functional code contributed by Ulrich Drepper. The
5394 collation information comes from the POSIX locale definitions.
5396 * The new header <langinfo.h> defines an interface for accessing
5397 various locale-dependent data (using the locale chosen with `setlocale').
5399 * Ulrich Drepper has contributed a new suite of functions for operation on
5400 wide-character and multibyte-character strings, in <wchar.h>;
5401 and classification and case conversion of wide characters, in <wctype.h>.
5402 These new functions are conforming to the ISO C, Amendement 1 specification.
5404 * There is now a second implementation of the standard I/O library available.
5405 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5406 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5408 * You can now use positional parameter specifications in format strings
5409 for the `printf' and `scanf' families of functions. For example,
5410 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5411 ``Number 6, Mr Jones''. This is mainly useful when providing different
5412 format strings for different languages, whose grammars may dictate
5413 different orderings of the values being printed. To support this
5414 feature, the interface for `register_printf_handler' has changed; see
5415 the header file <printf.h> for details.
5417 * The `printf' and `scanf' families of functions now understand a new
5418 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5419 to group numbers as indicated by the locale; for `scanf' and friends, this
5420 says to accept as valid only a number with all the proper grouping
5421 separators in the right places. In the default "C" locale, numbers are
5422 not grouped; but locales for specific countries will define the usual
5423 conventions (i.e. separate thousands with `,' in the US locale).
5425 * The pgrp functions have been regularized, slightly incompatibly but much
5426 less confusingly. The core functions are now `getpgid' and `setpgid',
5427 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5428 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5429 provided for compatibility. There is no longer an incompatible `getpgrp'
5430 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5432 * The new header file <fts.h> and suite of functions simplify programs that
5433 operate on directory trees. This code comes from 4.4 BSD.
5435 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5436 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5437 NSS scheme used in glibc.
5439 * There is a new malloc debugging hook `__memalign_hook'.
5441 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5442 `unsigned int' in <sys/types.h>. These are for compatibility only and
5443 their use is discouraged.
5445 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5446 done differently, so that it works even without GNU ld.
5448 * New function `euidaccess' checks allowed access to a file like `access',
5449 but using the effective IDs instead of the real IDs.
5451 * The time zone data files have been updated for the latest and greatest
5452 local time conventions of the countries of the world.
5454 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5457 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5458 for formatting floating-point numbers. They are provided only for
5459 compatibility; new programs should use `sprintf' instead. There are
5460 also equivalent function for the `long double' floating-point type and
5461 all functions also exist in a reentrant form.
5463 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5464 functions for maintaining the login-record files (primarily of use to
5465 system programs such as `login'), and convenient functions for
5466 allocating and initializing a pseudo-terminal (pty) device.
5468 * Ulrich Drepper has contributed new support for System V style
5469 shared memory and IPC on systems that support it.
5471 * Ulrich Drepper has contributed several miscellaneous new functions found
5472 in System V: The `hsearch' family of functions provide an effective
5473 implementation of hash tables; `a64l' and `l64a' provide a very simple
5474 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5477 * Ulrich Drepper has contributed new reentrant counterparts for the
5478 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5480 * Ulrich Drepper has contributed new, highly-optimized versions of several
5481 string functions for the i486/Pentium family of processors.
5483 * Ulrich Drepper has updated the Linux-specific code, based largely
5484 on work done in Hongjiu Lu's version of GNU libc for Linux.
5485 The GNU library now supports Linux versions 2.0.10 and later,
5486 using the ELF object file format (i[3456]86-*-linux).
5488 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5490 * David Mosberger-Tang and Richard Henderson have ported the C library
5491 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5492 dynamic linking support for ELF/Alpha.
5494 * Richard Henderson contributed several Alpha optimized assembler function
5495 for arithmetic and string handling.
5497 * Ulrich Drepper has contributed a new set of message catalog functions to
5498 support multiple languages using the <libintl.h> interface, for use with
5499 his new package GNU gettext. Translation volunteers have contributed
5500 catalogs of the library's messages in Spanish, German, and Korean.
5502 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5503 program and the `catgets' function for reading the catalog files it
5504 creates. (The <libintl.h> interface is preferred; we include the
5505 <nl_types.h> interface using `catgets' only for source compatibility with
5506 programs already written to use it.)
5508 * New header file <values.h> gives SVID-compatible names for <limits.h>
5511 * Various new macros, declarations, and small header files for compatibility
5514 * New function `group_member' is a convenient way to check if a process has
5515 a given effective group ID.
5517 * When using GCC 2.7 and later, the socket functions are now declared in a
5518 special way so that passing an argument of type `struct sockaddr_in *',
5519 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5520 `struct sockaddr *' type, does not generate a type-clash warning.
5522 * New function `error' declared in header file <error.h> is a convenient
5523 function for printing error messages and optionally exiting; this is the
5524 canonical function used in GNU programs. The new functions `err', `warn',
5525 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5526 doing the same thing.
5528 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5529 POSIX.2 `glob' function to do ~ and {...} expansion.
5531 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5532 `clearenv' which is used in POSIX.9 is also available.
5534 * New function `getsid' returns session ID number on systems that support it.
5536 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5537 files <db.h> and <mpool.h> provide a rich set of functions for several
5538 types of simple databases stored in memory and in files, and <ndbm.h> is
5539 an old `ndbm'-compatible interface using the `db' functions. Link with
5540 `-ldb' to get these functions.
5542 * New macro `strdupa' copies a string like `strdup', but uses local stack
5543 space from `alloca' instead of dynamic heap space from `malloc'.
5545 * New function `strnlen' is like `strlen' but searches only a given maximum
5546 number of characters for the null terminator. `stpncpy', `strndup' and
5547 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5550 * New function `statfs' in header <sys/statfs.h>.
5552 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5553 provide convenient functions for operating on blocks of null-terminated
5556 * A new suite of functions in <utmp.h> handle all the details of reading
5557 and writing the utmp file.
5559 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5562 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5563 completely POSIX compliant and also implemented the extended functionality
5564 to handle alternate digit representation and alternate era date formats.
5566 * Ulrich Drepper provided an implementation of the `strptime' function
5567 defined in XPG4.2 which transforms a string into a `struct tm' value.
5569 * Paul Eggert provided the tzselect shell script as part of the timezone
5570 code. The shell script makes it easy to select the correct timezone
5573 * The implementation of the malloc family of functions is completely replaced
5574 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5575 The implementation uses the mmap function (if available) and it is
5576 optimized for the use in multi threaded programs.
5578 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5579 functions. This new functionality is usable by specifying a special
5580 salt string and it is compatible with implementation on *BSD systems.
5582 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5583 `getsubopt' to handle second level command line options, `bsd_signal'
5584 to access BSD style `signal' functionality, the obsolete `regexp' style
5587 * the `lchown' function is available on system which support this
5590 * The implementation of the shadow password handling function was contributed
5593 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5595 * POSIX.1g support was added. The <sys/select.h> header is available,
5596 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5597 implementation of `getaddrinfo'.
5601 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5603 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5604 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5606 * The new function `daemon' from 4.4 BSD is useful for server programs that
5607 want to put themselves in the background.
5609 * Joel Sherrill has contributed support for several standalone boards that
5610 run without an operating system.
5612 * `printf', `scanf' and friends now accept a `q' type modifier for long
5613 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5615 * All of the code taken from BSD (notably most of the math and networking
5616 routines) has been updated from the BSD 4.4-Lite release.
5618 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5620 * The new functions `getdomainname' and `setdomainname' fetch or change the
5621 YP/NIS domain name. These are system calls which exist on systems which
5624 * The time zone data files have been updated for the latest international
5627 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5628 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5632 * The C library now includes support for Sun RPC, from Sun's free
5633 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5634 are included. (There is still no support for YP.)
5636 * Tom Quinn has contributed a port of the C library to SGI machines running
5637 Irix 4 (mips-sgi-irix4).
5639 * The new `lockf' function is a simplified interface to the locking
5640 facilities of `fcntl', included for compatibility.
5642 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5644 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5646 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5649 * The error message printed by `assert' for a failed assertion now includes
5650 the name of the program (if using GNU ld) and the name of the calling
5651 function (with versions of GCC that support this).
5653 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5655 * The library now includes the <sys/mman.h> header file and memory
5656 management functions `mmap', `munmap', `mprotect', `msync', and
5657 `madvise', on systems that support those facilities.
5659 * The interface for `mcheck' has changed slightly: the function called to
5660 abort the program when an allocation inconsistency is detected now takes
5661 an argument that indicates the type of failure. The new function
5662 `mprobe' lets you request a consistency check for a particular block at
5663 any time (checks are normally done only when you call `free' or `realloc'
5666 * It is now possible to easily cross-compile the C library, building on one
5667 system a library to run on another machine and/or operating system. All
5668 you need to do is set the variable `HOST_CC' in `configparms' to the
5669 native compiler for programs to run on the machine you are building on (a
5670 few generator programs are used on Unix systems); set `CC' to the
5673 * The new function `fexecve' (only implemented on the GNU system) executes
5674 a program file given a file descriptor already open on the file.
5678 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5679 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5681 * You can set the variable `libprefix' in `configparms' to specify a prefix
5682 to be prepended to installed library files; this makes it easy to install
5683 the GNU C library to be linked as `-lgnuc' or whatever.
5685 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5686 copies a limited number of characters from a string, and returns the
5687 address of the last character written.
5689 * You no longer need to check for whether the installed `stddef.h' is
5690 compatible with the GNU C library. configure now checks for you.
5692 * You can now define a per-stream `fileno' function to convert the
5693 stream's cookie into an integral file descriptor.
5695 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5696 allocates zero bytes of storage, and returns a unique pointer which
5697 you can pass to `realloc' or `free'. The behavior is undefined if
5698 you dereference this pointer.
5700 * The C library now runs on Sony NEWS m68k machines running either
5701 NewsOS 3 or NewsOS 4.
5703 * The new `syscall' function is a system-dependent primitive function
5704 for invoking system calls. It has the canonical behavior on Unix
5705 systems, including unreliable return values for some calls (such as
5706 `pipe', `fork' and `getppid').
5708 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5709 to `EAGAIN', which is the preferred name. On systems whose kernels
5710 use two distinct codes, the C library now translates EWOULDBLOCK to
5711 EAGAIN in every system call function.
5715 * The GNU C Library Reference Manual is now distributed with the library.
5716 `make dvi' will produce a DVI file of the printed manual.
5717 `make info' will produce Info files that you can read on line using C-h i
5718 in Emacs or the `info' program.
5719 Please send comments on the manual to bug-glibc-manual@gnu.org.
5721 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5723 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5725 * Jason Merrill has contributed a port to the Sequent Symmetry running
5726 Dynix version 3 (i386-sequent-dynix).
5728 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5729 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5731 * New function `memory_warnings' lets you arrange to get warnings when
5732 malloc is running out of memory to allocate, like Emacs gives you.
5734 * The C library now contains the relocating allocator used in Emacs 19 for
5735 its editing buffers. This allocator (ralloc) minimizes allocation
5736 overhead and fragmentation by moving allocated regions around whenever it
5737 needs to. You always refer to a ralloc'd region with a "handle" (a
5738 pointer to a pointer--an object of type `void **').
5740 * There is a new `printf' format: `%m' gives you the string corresponding
5741 to the error code in `errno'.
5743 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5744 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5745 pass, the `a' modifier says to fill in a `char **' you pass with a
5748 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5749 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5750 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5752 * `mkstemp' is a traditional Unix function to atomically create and open a
5753 uniquely-named temporary file.
5757 * The standard location for the file that says what the local timezone is
5758 has changed again. It is now `/usr/local/etc/localtime' (or more
5759 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5761 * The distribution no longer contains any files with names longer than 14
5764 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5765 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5767 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5771 * The configuration process has changed quite a bit. The `configure'
5772 script is now used just like the configuration scripts for other GNU
5773 packages. The `sysdeps' directory hierarchy is much rearranged.
5774 The file `INSTALL' explains the new scheme in detail.
5776 * The header files no longer need to be processed into ANSI C and
5777 traditional C versions. There is just one set of files to install, and
5778 it will work with ANSI or old C compilers (including `gcc -traditional').
5780 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5781 MIPS DECStation running Ultrix 4.
5783 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5784 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5785 made itself into a shared library.
5787 * Yet further improved support for the i386, running 4.3 BSD-like systems
5788 (such as Mach 3 with the Unix single-server), or System V.
5790 * New function `strncasecmp' to do case-insensitive string comparison
5791 with limited length.
5793 * New function `strsep' is a reentrant alternative to `strtok'.
5795 * New functions `scandir' and `alphasort' for searching directories.
5797 * New function `setenv' is a better interface to `putenv'.
5799 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5800 function for traversing a directory tree.
5802 * The GNU obstack package is now also part of the C library.
5803 The new function `open_obstack_stream' creates a stdio stream that
5804 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5805 formatted output directly to an obstack.
5807 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5808 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5810 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5812 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5813 things to your strings.
5815 * There are some new test programs: test-fseek, testmb, and testrand.
5817 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5818 These ports are not finished, but are a good starting place for really
5819 supporting those systems.
5821 * `/etc/localtime' is now the standard location for the file that says what
5822 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5823 This follows the general principle that `/etc' is the place for all local
5824 configuration files.
5826 * The C library header files now use `extern "C"' when used by the C++
5827 compiler, so the C library should now work with C++ code.
5829 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5830 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5833 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5834 function which uses the `merge sort' algorithm, and is said to be
5835 significantly faster than the old GNU `qsort' function. Merge sort is
5836 now the standard `qsort' function. The new algorithm can require a lot
5837 of temporary storage; so, the old sorting function is called when the
5838 required storage is not available.
5840 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5841 provides the Unix `crypt' function, plus some other entry points.
5843 * The code and header files taken from 4.4 BSD have been updated with the
5844 latest files released from Berkeley.
5846 ----------------------------------------------------------------------
5847 Copyright information:
5849 Copyright (C) 1992-2020 Free Software Foundation, Inc.
5851 Permission is granted to anyone to make or distribute verbatim copies
5852 of this document as received, in any medium, provided that the
5853 copyright notice and this permission notice are preserved,
5854 thus giving the recipient permission to redistribute in turn.
5856 Permission is granted to distribute modified versions
5857 of this document, or of portions of it,
5858 under the above conditions, provided also that they
5859 carry prominent notices stating who last changed them.
5862 version-control: never