1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2019 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 gettimeofday function will no longer report information about a
25 system-wide time zone, expect for aarch64, powerpc, and x86 on Linux
26 which still uses the vDSO symbol (when available).
28 This 4.2-BSD-era feature has been deprecated for many years, as it cannot
29 handle the full complexity of the world's timezones, but hitherto we have
30 supported it on a best-effort basis. Changes required to support 64-bit
31 time_t on 32-bit architectures have made this no longer practical.
33 As of this release, callers of gettimeofday with a non-null 'tzp' argument
34 will always receive a 'struct timezone' whose tz_minuteswest and
35 tz_dsttime fields are zero.
37 Deprecated and removed features, and other changes affecting compatibility:
39 * The totalorder and totalordermag functions, and the corresponding
40 functions for other floating-point types, now take pointer arguments to
41 avoid signaling NaNs possibly being converted to quiet NaNs in argument
42 passing. This is in accordance with the resolution of Clarification
43 Request 25 to TS 18661-1, as applied for C2X. Existing binaries that pass
44 floating-point arguments directly will continue to work.
46 * The obsolete function stime is no longer available to newly linked
47 binaries and it has been removed from <time.h> header. This function
48 has been deprecated in favor of clock_settime.
50 * The settimeofday function can still be used to set a system-wide time
51 zone when the operating system supports it. This is because the Linux
52 kernel reused the API, on some architectures, to describe a system-wide
53 time-zone-like offset between the software clock maintained by the kernel,
54 and the "RTC" clock that keeps time when the system is shut down.
56 However, to reduce the odds of this offset being set by accident,
57 settimeofday can no longer be used to set the time and the offset
58 simultaneously. If both of its two arguments are non-null, the call
59 will fail (setting errno to EINVAL).
61 Callers attempting to set this offset should also be prepared for the call
62 to fail and set errno to ENOSYS; this already happens on the Hurd and on
63 some Linux architectures. The Linux kernel maintainers are discussing a
64 more principled replacement for the reused API. After a replacement
65 becomes available, we will change settimeofday to fail with ENOSYS on all
66 platforms when its 'tzp' argument is not a null pointer.
68 Note that settimeofday itself is obsolescent according to POSIX.
69 Programs that set the system time should use clock_settime and/or
70 the adjtime family of functions instead. We may also cease to make
71 settimeofday available to newly linked binaries after there is a
72 replacement for Linux's time-zone-like offset API.
74 * The obsolete functions ftime has been deprecated and will be removed from
75 a future version of glibc. Application should use clock_gettime instead.
77 Changes to build and runtime requirements:
79 [Add changes to build and runtime requirements here]
81 Security related changes:
83 [Add security related changes here]
85 The following bugs are resolved with this release:
87 [The release manager will add the list generated by
88 scripts/list-fixed-bugs.py just before the release.]
95 * Unicode 12.1.0 Support: Character encoding, character type info, and
96 transliteration tables are all updated to Unicode 12.1.0, using
97 generator scripts contributed by Mike FABIAN (Red Hat).
99 * The dynamic linker accepts the --preload argument to preload shared
100 objects, in addition to the LD_PRELOAD environment variable.
102 * The twalk_r function has been added. It is similar to the existing
103 twalk function, but it passes an additional caller-supplied argument
104 to the callback function.
106 * On Linux, the getdents64, gettid, and tgkill functions have been added.
108 * Minguo (Republic of China) calendar support has been added as an
109 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
112 * The entry for the new Japanese era has been added for ja_JP locale.
114 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
115 pvalloc, memalign, and posix_memalign fail now with total object size
116 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
117 pointer subtraction within the allocated object, where results might
118 overflow the ptrdiff_t type.
120 * The dynamic linker no longer refuses to load objects which reference
121 versioned symbols whose implementation has moved to a different soname
122 since the object has been linked. The old error message, symbol
123 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
124 link time reference, is gone.
126 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
127 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
128 functions. These behave similarly to their "timed" equivalents, but also
129 accept a clockid_t parameter to determine which clock their timeout should
130 be measured against. All functions allow waiting against CLOCK_MONOTONIC
131 and CLOCK_REALTIME. The decision of which clock to be used is made at the
132 time of the wait (unlike with pthread_condattr_setclock, which requires
133 the clock choice at initialization time).
135 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
136 work, new resolvers can use a second argument which can be extended in
137 the future, currently it contains the AT_HWCAP2 value.
139 Deprecated and removed features, and other changes affecting compatibility:
141 * The copy_file_range function fails with ENOSYS if the kernel does not
142 support the system call of the same name. Previously, user space
143 emulation was performed, but its behavior did not match the kernel
144 behavior, which was deemed too confusing. Applications which use the
145 copy_file_range function can no longer rely on glibc to provide a fallback
146 on kernels that do not support the copy_file_range system call, and if
147 this function returns ENOSYS, they will need to use their own fallback.
148 Support for copy_file_range for most architectures was added in version
149 4.5 of the mainline Linux kernel.
151 * The functions clock_gettime, clock_getres, clock_settime,
152 clock_getcpuclockid, clock_nanosleep were removed from the librt library
153 for new applications (on architectures which had them). Instead, the
154 definitions in libc will be used automatically, which have been available
157 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
158 and <sys/stropts.h> have been removed.
160 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
161 resolver flag (deprecated in glibc 2.25) have been removed.
163 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
164 resolver have been removed from <resolv.h>.
166 * With --enable-bind-now, installed programs are now linked with the
169 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
170 configurations) has been removed, following the deprecation of this
171 subarchitecture in version 8 of GCC, and its removal in version 9.
173 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
174 header have been removed.
176 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
177 deprecated and will be removed from a future version of glibc.
178 Application should directly access /proc instead. For obtaining random
179 bits, the getentropy function can be used.
181 Changes to build and runtime requirements:
183 * GCC 6.2 or later is required to build the GNU C Library.
185 Older GCC versions and non-GNU compilers are still supported when
186 compiling programs that use the GNU C Library.
188 Security related changes:
190 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
191 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
192 has undefined behavior. On x32, the size_t argument may be passed
193 in the lower 32 bits of the 64-bit RDX register with non-zero upper
194 32 bits. When it happened with the sign bit of RDX register set,
195 memcmp gave the wrong result since it treated the size argument as
196 zero. Reported by H.J. Lu.
198 CVE-2019-9169: Attempted case-insensitive regular-expression match
199 via proceed_next_node in posix/regexec.c leads to heap-based buffer
200 over-read. Reported by Hongxu Chen.
202 The following bugs are resolved with this release:
204 [2872] locale: Transliteration Cyrillic -> ASCII fails
205 [6399] libc: gettid() should have a wrapper
206 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
207 [16976] glob: fnmatch unbounded stack VLA for collating symbols
208 [17396] localedata: globbing for locale by [[.collating-element.]]
209 [18035] dynamic-link: pldd does no longer work, enters infinite loop
210 [18465] malloc: memusagestat is built using system C library
211 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
212 invalid input drops valid char
213 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
214 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
215 [21897] localedata: Afar locales: Fix mon, abmon, and abday
216 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
217 [23352] malloc: __malloc_check_init still defined in public header
219 [23403] nptl: Wrong alignment of TLS variables
220 [23501] libc: nftw() doesn't return dangling symlink's inode
221 [23733] malloc: Check the count before calling tcache_get()
222 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
224 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
225 [23844] nptl: pthread_rwlock_trywrlock results in hang
226 [23983] argparse: Missing compat versions of argp_failure and argp_error
227 for long double = double
228 [23984] libc: Missing compat versions of err.h and error.h functions for
230 [23996] localedata: Dutch salutations
231 [24040] libc: riscv64: unterminated call chain in __thread_start
232 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
234 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
235 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
237 [24114] regex: regexec buffer read overrun in "grep -i
238 '\(\(\)*.\)*\(\)\(\)\1'"
239 [24122] libc: Segfaults if 0 returned from la_version
240 [24153] stdio: Some input functions do not react to stdin assignment
241 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
242 RDX is set) (CVE-2019-7309)
243 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
244 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
245 not the default "nor"
246 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
247 false positives, change to modern flexible array
248 [24180] nptl: pthread_mutex_trylock does not use the correct order of
249 instructions while maintaining the robust mutex list due to missing
251 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
252 unnecessary librt dependencies
253 [24200] localedata: Revert first_weekday removal in en_IE locale
254 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
255 [24215] nptl: pthread_timedjoin_np should be a cancellation point
256 [24216] malloc: Check for large bin list corruption when inserting
258 [24228] stdio: old x86 applications that use legacy libio crash on exit
259 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
261 [24293] localedata: Missing Minguo calendar support for TW locales
262 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
264 [24307] localedata: Update locale data to Unicode 12.0.0
265 [24323] dynamic-link: dlopen should not be able open PIE objects
266 [24335] build: "Obsolete types detected" with Linux 5.0 headers
267 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
269 [24370] localedata: Add lang_name for tt_RU locale
270 [24372] locale: Binary locale files are not architecture independent
271 [24394] time: strptime %Ey mis-parses final year of era
272 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
274 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
276 [24531] malloc: Malloc tunables give tcache assertion failures
277 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
279 [24535] localedata: Update locale data to Unicode 12.1.0
280 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
281 kernels and break testing
282 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
283 [24556] build: [GCC 9] error: ‘%s’ directive argument is null
284 [-Werror=format-overflow=]
285 [24570] libc: alpha: compat msgctl uses __IPC_64
286 [24584] locale: Data race in __wcsmbs_clone_conv
287 [24588] stdio: Remove codecvt vtables from libio
288 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
290 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
291 [24632] stdio: Old binaries which use freopen with default stdio handles
293 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
295 [24652] localedata: szl_PL spelling correction
296 [24695] nss: nss_db: calling getpwent after endpwent crashes
297 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
298 in /etc/nsswitch.conf
299 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
300 [24740] libc: getdents64 type confusion
301 [24741] dynamic-link: ld.so should not require that a versioned symbol is
302 always implemented in the same library
303 [24744] libc: Remove copy_file_range emulation
304 [24757] malloc: memusagestat is linked against system libpthread
305 [24794] libc: Partial test suite run builds corrupt test-in-container
313 * The getcpu wrapper function has been added, which returns the currently
314 used CPU and NUMA node. This function is Linux-specific.
316 * A new convenience target has been added for distribution maintainers
317 to build and install all locales as directories with files. The new
318 target is run by issuing the following command in your build tree:
319 'make localedata/install-locale-files', with an optional DESTDIR
320 to set the install root if you wish to install into a non-default
323 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
325 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
326 for _GNU_SOURCE, to match BSD environments.
328 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
329 indicates that it will abort the transaction prior to entering the kernel
330 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
331 suspended, and this caused some undefined side-effects issues by aborting
332 transactions manually. Glibc avoided it by abort transactions manually on
333 each syscall, but it lead to performance issues on newer kernels where the
334 HTM state is saved and restore lazily (the state being saved even when the
335 process actually does not use HTM).
337 * The functions posix_spawn_file_actions_addchdir_np and
338 posix_spawn_file_actions_addfchdir_np have been added, enabling
339 posix_spawn and posix_spawnp to run the new process in a different
340 directory. These functions are GNU extensions. The function
341 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
344 * The popen and system do not run atfork handlers anymore (BZ#17490).
345 Although it is a possible POSIX violation, the POSIX rationale in
346 pthread_atfork documentation regarding atfork handlers is to handle
347 inconsistent mutex state after a fork call in a multi-threaded process.
348 In both popen and system there is no direct access to user-defined mutexes.
350 * Support for the C-SKY ABIV2 running on Linux has been added. This port
351 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
353 - C-SKY ABIV2 soft-float little-endian
354 - C-SKY ABIV2 hard-float little-endian
356 * strftime's default formatting of a locale's alternative year (%Ey)
357 has been changed to zero-pad the year to a minimum of two digits,
358 like "%y". This improves the display of Japanese era years during
359 the first nine years of a new era, and is expected to be harmless
360 for all other locales (only Japanese locales regularly have
361 alternative year numbers less than 10). Zero-padding can be
362 overridden with the '_' or '-' flags (which are GNU extensions).
364 * As a GNU extension, the '_' and '-' flags can now be applied to
365 "%EY" to control how the year number is formatted; they have the
366 same effect that they would on "%Ey".
368 Deprecated and removed features, and other changes affecting compatibility:
370 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
371 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
373 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
374 in <sys/procfs.h>, has been corrected to match the type actually used by
375 the Linux kernel. This affects the size and layout of that structure on
376 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
378 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
379 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
380 defined in <sys/procfs.h>, has been corrected to match the type actually
381 used by the Linux kernel. This affects the size and layout of those
384 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
385 meant to scan a string and allocate space for it with malloc, is now
386 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
387 defined. This extension conflicts with C99's use of '%a' to scan a
388 hexadecimal floating-point number, which is now available to programs
389 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
391 POSIX.1-2008 includes the feature of allocating a buffer for string input
392 with malloc, using the modifier letter 'm' instead. Programs using
393 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
394 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
395 C99 '%a' no longer need to avoid _GNU_SOURCE.
397 GCC's -Wformat warnings can detect most uses of this extension, as long
398 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
399 __attribute__ ((format (scanf, ...))).
401 Changes to build and runtime requirements:
403 * Python 3.4 or later is required to build the GNU C Library.
405 * On most architectures, GCC 5 or later is required to build the GNU C
406 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
408 Older GCC versions and non-GNU compilers are still supported when
409 compiling programs that use the GNU C Library.
411 Security related changes:
413 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
414 denial of service due to resource exhaustion when processing getaddrinfo
415 calls with crafted host names. Reported by Guido Vranken.
417 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
418 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
419 happened, accessing the 32-bit size_t value as the full 64-bit register
420 in the assembly string/memory functions would cause a buffer overflow.
423 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
424 addresses with arbitrary trailing characters, potentially leading to data
425 or command injection issues in applications.
427 The following bugs are resolved with this release:
429 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
430 [10496] localedata: 12h time representation in multiple locales faulty
431 [10797] localedata: it_IT locale numeric does not have a separator for
433 [11319] libc: dprintf doesn't handle errors properly
434 [16346] time: mktime: potentially unsafe use of localtime_offset
435 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
437 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
438 posix_spawn_file_actions_addfchdir_np
439 [17426] localedata: Indian locales: set the correct date format
440 [17490] stdio: popen should not invoke atfork handlers
441 [17783] libc: TIOCSER_TEMT conditions inconsistent
442 [18040] regex: use-after-free in regexec/get_subexp
443 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
444 [20018] network: getaddrinfo should reject IP addresses with trailing
445 characters (CVE-2016-10739)
446 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
447 [20271] libc: Missing "\n" in __libc_fatal calls
448 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
449 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
450 pointer argument is non-NULL
451 [21037] stdio: open_memstream and freopen
452 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
453 [21716] time: Crash in glibc's mktime in low-memory situations
454 [22834] stdio: Subprocess forked by popen may crash in Linux when
455 multithreads call popen
456 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
457 and pthread_create fails.
458 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
459 [23125] libc: riscv64: endless loop when throwing an exception from a
461 [23275] nptl: Race in pthread_mutex_lock while promoting to
462 PTHREAD_MUTEX_ELISION_NP.
463 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
465 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
467 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
469 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
470 [23509] dynamic-link: CET enabled glibc is incompatible with the older
472 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
473 [23521] nss: get_next_alias nss_files file stream leak
474 [23538] nptl: Hang in pthread_cond_broadcast
475 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
476 [23578] regex: Invalid memory access if regex pattern contains NUL byte
477 [23579] libc: Errors misreported in preadv2
478 [23597] build: support/test-container.c doesn't work with different
480 [23603] time: mktime signed integer overflow on large timestamps
481 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
482 [23614] libc: powerpc: missing CFI register information in __mpn_*
484 [23637] string: Generic strstr/strcasestr fails with huge needles
485 [23640] libc: no way to easily clear FD_CLOEXEC in
486 posix_spawn_file_actions_adddup2()
487 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
489 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
491 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
492 [23689] libc: Bug in documentation for rusage.ru_ixrss in
493 bits/types/struct_rusage.h
494 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
496 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
498 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
499 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
500 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
502 [23724] localedata: Albanian date formats are incorrect
503 [23735] math: libnldbl_nonshared.a references internal libm symbols
504 [23740] localedata: kl_GL: Month names and date formats need update
505 [23744] regex: regex refactorings to remove BE, avoid duplication
506 [23745] time: mktime fix for Gnulib + coreutils
507 [23758] time: Improve the width of alternate representation for year in
509 [23783] libc: [mips] Missing CMSPAR bits/termios.h
510 [23789] time: mktime does not set errno on failure
511 [23791] localedata: Wrong monetary format for ca_ES locale
512 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
513 [23794] locale: c16rtomb does not handle surrogate pairs
514 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
515 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
516 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
517 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
518 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
519 [23862] libc: [sh] missing kernel-features.h undefines
520 [23864] libc: [riscv] missing kernel-features.h undefines
521 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
522 [23907] malloc: Incorrect double-free malloc tcache check disregards
524 [23913] libc: off-by-one in function maybe_script_execute in
525 sysdeps/posix/spawni.c
526 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
527 [23923] locale: Add --no-hard-links option to localedef
528 [23927] network: Linux if_nametoindex() does not close descriptor
530 [23961] math: powf can overflow to inf without setting errno in non-
531 nearest rounding mode
532 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
533 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
534 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
535 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
536 [24011] localedata: Fixed small type in comment for locale bs_BA
537 [24018] libc: gettext() may return NULL
538 [24022] build: riscv build failure with Linux kernel 4.20-rc7
539 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
540 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
542 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
543 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
545 [24046] localedata: en_US locale doesn't define date_fmt
546 [24063] manual: @var{errno} should be @code{errno}
547 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
548 [24088] libc: VSCR field is not being correctly read in ucontext_t on
550 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
552 [24097] string: Can't use 64-bit register for size_t in assembly codes for
554 [24110] hurd: SS_DISABLE never set in stack_t value returned by
556 [24112] network: Do not send DNS queries for non-host names (where all
557 answers will be rejected)
558 [24130] libc: alpha __remqu corrupts $f3 register
565 * The localization data for ISO 14651 is updated to match the 2016
566 Edition 4 release of the standard, this matches data provided by
567 Unicode 9.0.0. This update introduces significant improvements to the
568 collation of Unicode characters. This release deviates slightly from
569 the standard in that the collation element ordering for lowercase and
570 uppercase LATIN script characters is adjusted to ensure that regular
571 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
572 is not matched by [a-z]. With the update many locales have been
573 updated to take advantage of the new collation information. The new
574 collation information has increased the size of the compiled locale
575 archive or binary locales.
577 * The GNU C Library can now be compiled with support for Intel CET, AKA
578 Intel Control-flow Enforcement Technology. When the library is built
579 with --enable-cet, the resulting glibc is protected with indirect
580 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
581 compatible with all existing executables and shared libraries. This
582 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
583 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
584 capable of multi-byte NOPs, like x86-64 processors as well as Intel
585 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
586 x86_64 and x32 on non-CET processors. --enable-cet has been tested
587 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
590 * The GNU C Library now has correct support for ABSOLUTE symbols
591 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
592 relocated incorrectly or in some cases discarded. The GNU linker can
593 make use of the newer semantics, but it must communicate it to the
594 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
595 field) to indicate such support is required.
597 * Unicode 11.0.0 Support: Character encoding, character type info, and
598 transliteration tables are all updated to Unicode 11.0.0, using
599 generator scripts contributed by Mike FABIAN (Red Hat).
601 * <math.h> functions that round their results to a narrower type are added
602 from TS 18661-1:2014 and TS 18661-3:2015:
604 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
607 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
610 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
613 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
616 * Two grammatical forms of month names are now supported for the following
617 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
618 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
619 support two grammatical forms in abbreviated month names: Catalan, Greek,
622 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
623 include the support for two grammatical forms of month names.
625 * Building and running on GNU/Hurd systems now works without out-of-tree
628 * The renameat2 function has been added, a variant of the renameat function
629 which has a flags argument. If the flags are zero, the renameat2 function
630 acts like renameat. If the flag is not zero and there is no kernel
631 support for renameat2, the function will fail with an errno value of
632 EINVAL. This is different from the existing gnulib function renameatu,
633 which performs a plain rename operation in case of a RENAME_NOREPLACE
634 flags and a non-existing destination (and therefore has a race condition
635 that can clobber the destination inadvertently).
637 * The statx function has been added, a variant of the fstatat64
638 function with an additional flags argument. If there is no direct
639 kernel support for statx, glibc provides basic stat support based on
640 the fstatat64 function.
642 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
643 library if installed. libidn2 version 2.0.5 or later is recommended. If
644 libidn2 is not available, internationalized domain names are not encoded
645 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
646 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
647 with an encoding error.) Flags which used to change the IDN encoding and
648 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
649 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
650 deprecated. They no longer have any effect.
652 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
653 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
654 range of ELF gABI expressions including such constructs as
655 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
656 have been further restricted, and where in the past a dynamic string
657 token sequence may have been interpreted as a literal string it will
658 now cause a load failure. These load failures were always considered
659 unspecified behaviour from the perspective of the dynamic loader, and
660 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
661 results in a load failure now.
663 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
664 implementation includes all the standard functions provided by
667 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
668 thrd_detach, thrd_exit, and thrd_join for thread management.
670 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
671 mtx_destroy for mutual exclusion.
673 - call_once for function call synchronization.
675 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
676 cnd_wait for conditional variables.
678 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
680 Application developers must link against libpthread to use ISO C threads.
682 Deprecated and removed features, and other changes affecting compatibility:
684 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
685 installed. Software that was using either header should be updated to
686 use standard <stdio.h> interfaces instead.
688 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
689 This was never required by the C standard, and the macros just expanded
690 to call alternative names for the same functions. If you hoped getc and
691 putc would provide performance improvements over fgetc and fputc, instead
692 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
693 necessary, flockfile and funlockfile.
695 * All stdio functions now treat end-of-file as a sticky condition. If you
696 read from a file until EOF, and then the file is enlarged by another
697 process, you must call clearerr or another function with the same effect
698 (e.g. fseek, rewind) before you can read the additional data. This
699 corrects a longstanding C99 conformance bug. It is most likely to affect
700 programs that use stdio to read interactive input from a terminal.
703 * The macros 'major', 'minor', and 'makedev' are now only available from
704 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
705 headers that happen to include <sys/types.h>. These macros are rarely
706 used, not part of POSIX nor XSI, and their names frequently collide with
707 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
710 <sys/sysmacros.h> is a GNU extension. Portable programs that require
711 these macros should first include <sys/types.h>, and then include
712 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
714 * The tilegx*-*-linux-gnu configurations are no longer supported.
716 * The obsolete function ustat is no longer available to newly linked
717 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
718 function has been deprecated in favor of fstatfs and statfs.
720 * The obsolete function nfsservctl is no longer available to newly linked
721 binaries. This function was specific to systems using the Linux kernel
722 and could not usefully be used with the GNU C Library on systems with
723 version 3.1 or later of the Linux kernel.
725 * The obsolete function name llseek is no longer available to newly linked
726 binaries. This function was specific to systems using the Linux kernel
727 and was not declared in a header. Programs should use the lseek64 name
728 for this function instead.
730 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
731 getaddrinfo and getnameinfo functions have been deprecated. The behavior
732 previously selected by them is now always enabled.
734 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
735 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
736 restriction (rejecting '_' in host names, among other things) has been
737 removed, for increased compatibility with non-IDN name resolution.
739 * The fcntl function now have a Long File Support variant named fcntl64. It
740 is added to fix some Linux Open File Description (OFD) locks usage on non
741 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
742 fcntl and LFS support is handled transparently. Also for Linux, the OFD
743 locks act as a cancellation entrypoint.
745 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
746 ecb_crypt, and des_setparity are no longer available to newly linked
747 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
748 longer installed. These functions encrypted and decrypted data with the
749 DES block cipher, which is no longer considered secure. Software that
750 still uses these functions should switch to a modern cryptography library,
753 * Reflecting the removal of the encrypt and setkey functions above, the
754 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
755 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
758 * The obsolete function fcrypt is no longer available to newly linked
759 binaries. It was just another name for the standard function crypt,
760 and it has not appeared in any header file in many years.
762 * We have tentative plans to hand off maintenance of the passphrase-hashing
763 library, libcrypt, to a separate development project that will, we hope,
764 keep up better with new passphrase-hashing algorithms. We will continue
765 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
766 'crypt_r' should not need to change at all; however, distributions will
767 need to install <crypt.h> and libcrypt from a separate project.
769 In this release, if the configure option --disable-crypt is used, glibc
770 will not install <crypt.h> or libcrypt, making room for the separate
771 project's versions of these files. The plan is to make this the default
772 behavior in a future release.
774 Changes to build and runtime requirements:
776 GNU make 4.0 or later is now required to build glibc.
778 Security related changes:
780 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
781 been fixed by removing the glibc-internal IDNA implementation and using
782 the system-provided libidn2 library instead. Originally reported by Hanno
783 Böck and Christian Weisgerber.
785 CVE-2017-18269: An SSE2-based memmove implementation for the i386
786 architecture could corrupt memory. Reported by Max Horn.
788 CVE-2018-11236: Very long pathname arguments to realpath function could
789 result in an integer overflow and buffer overflow. Reported by Alexey
792 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
793 architecture could write beyond the target buffer, resulting in a buffer
794 overflow. Reported by Andreas Schwab.
796 The following bugs are resolved with this release:
798 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
799 [6889] manual: 'PWD' mentioned but not specified
800 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
801 when __WORDSIZE != 64
802 [13762] regex: re_search etc. should return -2 on memory exhaustion
803 [13888] build: /tmp usage during testing
804 [13932] math: dbl-64 pow unexpectedly slow for some inputs
805 [14092] nptl: Support C11 threads
806 [14095] localedata: Review / update collation data from Unicode / ISO
808 [14508] libc: -Wformat warnings
809 [14553] libc: Namespace pollution loff_t in sys/types.h
810 [14890] libc: Make NT_PRFPREG canonical.
811 [15105] libc: Extra PLT references with -Os
812 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
814 [16335] manual: Feature test macro documentation incomplete and out of
816 [16552] libc: Unify umount implementations in terms of umount2
817 [17082] libc: htons et al.: statement-expressions prevent use on global
818 scope with -O1 and higher
819 [17343] libc: Signed integer overflow in /stdlib/random_r.c
820 [17438] localedata: pt_BR: wrong d_fmt delimiter
821 [17662] libc: please implement binding for the new renameat2 syscall
822 [17721] libc: __restrict defined as /* Ignore */ even in c11
823 [17979] libc: inconsistency between uchar.h and stdint.h
824 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
825 [18023] libc: extend_alloca is broken (questionable pointer comparison,
826 horrible machine code)
827 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
829 [18471] libc: llseek should be a compat symbol
830 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
832 [18991] nss: nss_files skips large entry in database
833 [19239] libc: Including stdlib.h ends up with macros major and minor being
835 [19463] libc: linknamespace failures when compiled with -Os
836 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
837 [19527] locale: Normalized charset name not recognized by setlocale
838 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
839 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
841 [19728] network: out of bounds stack read in libidn function
842 idna_to_ascii_4i (CVE-2016-6261)
843 [19729] network: out of bounds heap read on invalid utf-8 inputs in
844 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
845 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
847 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
848 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
849 [20419] dynamic-link: files with large allocated notes crash in
851 [20530] libc: bswap_16 should use __builtin_bswap16() when available
852 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
853 [20980] manual: CFLAGS environment variable replaces vital options
854 [21163] regex: Assertion failure in pop_fail_stack when executing a
855 malformed regexp (CVE-2015-8985)
856 [21234] manual: use of CFLAGS makes glibc detect no optimization
857 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
858 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
859 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
860 [21508] locale: intl/tst-gettext failure with latest msgfmt
861 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
862 [21812] network: getifaddrs() returns entries with ifa_name == NULL
863 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
865 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
867 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
868 [22247] network: Integer overflow in the decode_digit function in
869 puny_decode.c in libidn (CVE-2017-14062)
870 [22342] nscd: NSCD not properly caching netgroup
871 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
872 [22550] localedata: es_ES locale (and other es_* locales): collation
873 should treat ñ as a primary different character, sync the collation
874 for Spanish with CLDR
875 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
876 by gcc configured with --enable-default-pie
877 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
878 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
879 crossing 2GB threshold (CVE-2017-18269)
880 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
882 [22735] time: Misleading typo in time.h source comment regarding
884 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
885 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
886 `__assert_perror_fail ()' to `__assert_fail_base ()'
887 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
889 [22786] libc: Stack buffer overflow in realpath() if input size is close
890 to SSIZE_MAX (CVE-2018-11236)
891 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
892 through an absolute DT_NEEDED path
893 [22792] build: tcb-offsets.h dependency dropped
894 [22797] libc: pkey_get() uses non-reserved name of argument
895 [22807] libc: PTRACE_* constants missing for powerpc
896 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
897 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
898 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
899 [22848] localedata: ca_ES: update date definitions from CLDR
900 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
901 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
902 [22896] localedata: Update locale data for an_ES
903 [22902] math: float128 test failures with GCC 8
904 [22918] libc: multiple common of `__nss_shadow_database'
905 [22919] libc: sparc32: backtrace yields infinite backtrace with
907 [22926] libc: FTBFS on powerpcspe
908 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
910 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
911 [22947] libc: FAIL: misc/tst-preadvwritev2
912 [22963] localedata: cs_CZ: Add alternative month names
913 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
914 [22996] localedata: change LC_PAPER to en_US in es_BO locale
915 [22998] dynamic-link: execstack tests are disabled when SELinux is
917 [23005] network: Crash in __res_context_send after memory allocation
919 [23007] math: strtod cannot handle -nan
920 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
921 [23036] regex: regex equivalence class regression
922 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
923 [23069] libc: sigaction broken on riscv64-linux-gnu
924 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
925 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
926 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
927 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
928 and libc build with -Os)
929 [23140] localedata: More languages need two forms of month names
930 [23145] libc: _init/_fini aren't marked as hidden
931 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
932 [23171] math: C++ iseqsig for long double converts arguments to double
933 [23178] nscd: sudo will fail when it is run in concurrent with commands
934 that changes /etc/passwd
935 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
937 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
938 [23208] localedata: New locale - Lower Sorbian (dsb)
939 [23233] regex: Memory leak in build_charclass_op function in file
941 [23236] stdio: Harden function pointers in _IO_str_fields
942 [23250] nptl: Offset of __private_ss differs from GCC
943 [23253] math: tgamma test suite failures on i686 with -march=x86-64
944 -mtune=generic -mfpmath=sse
945 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
947 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
948 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
950 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
951 [23277] math: nan function should not have const attribute
952 [23279] math: scanf and strtod wrong for some hex floating-point
953 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
955 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
956 [23303] build: undefined reference to symbol
957 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
958 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
960 [23313] stdio: libio vtables validation and standard file object
962 [23329] libc: The __libc_freeres infrastructure is not properly run across
964 [23349] libc: Various glibc headers no longer compatible with
966 [23351] malloc: Remove unused code related to heap dumps and malloc
968 [23363] stdio: stdio-common/tst-printf.c has non-free license
969 [23396] regex: Regex equivalence regression in single-byte locales
970 [23422] localedata: oc_FR: More updates of locale data
971 [23442] build: New warning with GCC 8
972 [23448] libc: Out of bounds access in IBM-1390 converter
973 [23456] libc: Wrong index_cpu_LZCNT
974 [23458] build: tst-get-cpu-features-static isn't added to tests
975 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
977 [23467] dynamic-link: x86/CET: A property note parser bug
984 * The GNU C Library can now be compiled with support for building static
985 PIE executables (See --enable-static-pie in INSTALL). These static PIE
986 executables are like static executables but can be loaded at any address
987 and provide additional security hardening benefits at the cost of some
988 memory and performance. When the library is built with --enable-static-pie
989 the resulting libc.a is usable with GCC 8 and above to create static PIE
990 executables using the GCC option '-static-pie'. This feature is currently
991 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
992 aarch64 with binutils 2.30 or later.
994 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
995 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
998 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
1000 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
1002 * In order to support faster and safer process termination the malloc API
1003 family of functions will no longer print a failure address and stack
1004 backtrace after detecting heap corruption. The goal is to minimize the
1005 amount of work done after corruption is detected and to avoid potential
1006 security issues in continued process execution. Reducing shutdown time
1007 leads to lower overall process restart latency, so there is benefit both
1008 from a security and performance perspective.
1010 * The abort function terminates the process immediately, without flushing
1011 stdio streams. Previous glibc versions used to flush streams, resulting
1012 in deadlocks and further data corruption. This change also affects
1013 process aborts as the result of assertion failures.
1015 * On platforms where long double has the IEEE binary128 format (aarch64,
1016 alpha, mips64, riscv, s390 and sparc), the math library now implements
1017 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
1018 These are the same interfaces added in version 2.26 for some platforms where
1019 this format is supported but is not the format of long double.
1021 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
1022 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
1023 implements interfaces for that type, as defined by ISO/IEC TS
1024 18661-3:2015. These are corresponding interfaces to those supported for
1027 * The math library now implements interfaces for the _Float32, _Float64 and
1028 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
1029 corresponding interfaces to those supported for _Float128.
1031 * glibc now implements the memfd_create and mlock2 functions on Linux.
1033 * Support for memory protection keys was added. The <sys/mman.h> header now
1034 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
1037 * The copy_file_range function was added.
1039 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
1041 * The ldconfig utility now processes `include' directives using the C/POSIX
1042 collation ordering. Previous glibc versions used locale-specific
1043 ordering, the change might break systems that relied on that.
1045 * Support for two grammatical forms of month names has been added.
1046 In a call to strftime, the "%B" and "%b" format specifiers will now
1047 produce the grammatical form required when the month is used as part
1048 of a complete date. New "%OB" and "%Ob" specifiers produce the form
1049 required when the month is named by itself. For instance, in Greek
1050 and in many Slavic and Baltic languages, "%B" will produce the month
1051 in genitive case, and "%OB" will produce the month in nominative case.
1053 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
1054 are all valid and will all accept any known form of month
1055 name---standalone or complete, abbreviated or full. In a call to
1056 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
1057 the strings used by "%B" and "%b", respectively. New query
1058 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
1059 used by "%OB" and "%Ob", respectively.
1061 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
1062 define the strings for %OB and %Ob, respectively; these have the
1063 same syntax as "mon" and "abmon". These arrays are optional; if they
1064 are not provided then they have the same content as "mon" and "abmon",
1067 These features are provided for locales which define "alt_mon" and/or
1068 "ab_alt_mon" in their locale source data. This release includes such
1069 alternative month name data for the following languages: Belarusian,
1070 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
1072 This feature is currently a GNU extension, but it is expected to
1073 be added to the next revision of POSIX, and it is also already
1074 available on some BSD-derived operating systems.
1076 This feature will cause existing statically compiled applications
1077 to fail to load locales and fall back to the builtin C/POSIX locales.
1078 See notes below for other changes affecting compatibility.
1080 * Support for the RISC-V ISA running on Linux has been added. This port
1081 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
1082 for the following ISA and ABI pairs:
1088 Deprecated and removed features, and other changes affecting compatibility:
1090 * Statically compiled applications attempting to load locales compiled for the
1091 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1092 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1093 support for two grammatical forms of the month names, also extends the locale
1094 data binary format. Static applications needing locale support must be
1095 recompiled to match the runtime and data they are deployed with. In some
1096 distributions there is an upgrade window where dynamically linked applications
1097 may use a new library but the old locale data and also fall back to the
1098 builtin C/POSIX locales; restarting the application process is sufficient to
1101 * Support for statically linked applications which call dlopen is deprecated
1102 and will be removed in a future version of glibc. Applications which call
1103 dlopen need to be linked dynamically instead.
1105 * Support for old programs which use internal stdio data structures and
1106 functions is deprecated. This includes programs which use the C++ streams
1107 provided by libstdc++ in GCC 2.95. Programs which use the internal
1108 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1109 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1110 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1111 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1112 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1113 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1114 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1115 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1116 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1117 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1118 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1119 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1120 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1121 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1122 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1123 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1124 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1125 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1126 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1127 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1128 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1129 future version of glibc. Unlike other symbol removals, these old
1130 applications will not be supported using compatibility symbols.
1132 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1133 defined by <sys/ptrace.h>.
1135 * libm no longer supports SVID error handling (calling a user-provided
1136 matherr function on error) or the _LIB_VERSION variable to control error
1137 handling. (SVID error handling and the _LIB_VERSION variable still work
1138 for binaries linked against older versions of the GNU C Library.) The
1139 libieee.a library is no longer provided. math.h no longer defines struct
1140 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1141 TLOSS, PLOSS and HUGE.
1143 * The libm functions pow10, pow10f and pow10l are no longer supported for
1144 new programs. Programs should use the standard names exp10, exp10f and
1145 exp10l for these functions instead.
1147 * The mcontext_t type is no longer the same as struct sigcontext. On
1148 platforms where it was previously the same, this changes the C++ name
1149 mangling for interfaces involving this type.
1151 * The add-ons mechanism for building additional packages at the same time as
1152 glibc has been removed. The --enable-add-ons configure option is now
1155 * The --without-fp configure option is now ignored. Whether hardware
1156 floating-point instructions are used is now configured based on whether
1157 the compiler used at configure time (without any options implied by a
1158 --with-cpu= configure option) uses such instructions.
1160 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1161 the specified string can be parsed as a domain name.
1163 * In the malloc_info output, the <heap> element may contain another <aspace>
1164 element, "subheaps", which contains the number of sub-heaps.
1166 * The libresolv function p_secstodate is no longer supported for new
1169 * The tilepro-*-linux-gnu configuration is no longer supported.
1171 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1172 and will be removed in a future release. Software that is still using
1173 either header should be updated to use standard <stdio.h> interfaces
1176 libio.h was originally the header for a set of supported GNU extensions,
1177 but they have not been maintained as such in many years, they are now
1178 standing in the way of improvements to stdio, and we don't think there are
1179 any remaining external users. _G_config.h was never intended for public
1180 use, but predates the bits convention.
1182 Changes to build and runtime requirements:
1184 * bison version 2.7 or later is required to generate code in the 'intl'
1187 Security related changes:
1189 CVE-2009-5064: The ldd script would sometimes run the program under
1190 examination directly, without preventing code execution through the
1191 dynamic linker. (The glibc project disputes that this is a security
1192 vulnerability; only trusted binaries must be examined using the ldd
1195 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1196 suffered from a one-byte overflow during ~ operator processing (either
1197 on the stack or the heap, depending on the length of the user name).
1198 Reported by Tim Rühsen.
1200 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1201 would sometimes fail to free memory allocated during ~ operator
1202 processing, leading to a memory leak and, potentially, to a denial
1205 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1206 without GLOB_NOESCAPE, could write past the end of a buffer while
1207 unescaping user names. Reported by Tim Rühsen.
1209 CVE-2017-17426: The malloc function, when called with an object size near
1210 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1211 instead of NULL. This was a regression introduced with the new malloc
1212 thread cache in glibc 2.26. Reported by Iain Buclaw.
1214 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1215 to the allocation of too much memory. (This is not a security bug per se,
1216 it is mentioned here only because of the CVE assignment.) Reported by
1219 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1220 of the number of search path components. (This is not a security
1221 vulnerability per se because no trust boundary is crossed if the fix for
1222 CVE-2017-1000366 has been applied, but it is mentioned here only because
1223 of the CVE assignment.) Reported by Qualys.
1225 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1226 for AT_SECURE or SUID binaries could be used to load libraries from the
1229 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1230 succeeds without returning an absolute path due to unexpected behaviour
1231 of the Linux kernel getcwd syscall. Reported by halfdog.
1233 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1234 an object size near the value of SIZE_MAX, would return a pointer to a
1235 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1237 CVE-2018-6551: The malloc function, when called with an object size near
1238 the value of SIZE_MAX, would return a pointer to a buffer which is too
1239 small, instead of NULL.
1241 The following bugs are resolved with this release:
1243 [866] glob: glob should match dangling symlinks
1244 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1245 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1247 [5997] math: Very slow execution of sinf function
1248 [10580] localedata: hr_HR: updated locale
1249 [10871] locale: 'mon' array should contain both nominative and genitive
1251 [12349] localedata: eu_ES: incorrect thousands separator
1252 [13605] localedata: shn_MM: new Shan locale
1253 [13805] localedata: ru_RU: currency should use ',' as radix point
1254 [13953] localedata: km_KH: locale update
1255 [13994] localedata: mjw_IN: new locale
1256 [14121] build: make writes .mo files in po directory
1257 [14333] libc: Fix the race between atexit() and exit()
1258 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1259 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1261 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1262 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1263 width Latin characters
1264 [15332] localedata: es_CU: locale update
1265 [15436] stdio: Don't close or flush stdio streams on abort
1266 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1268 [16148] localedata: ca_ES: incorrect thousands separator
1269 [16750] dynamic-link: ldd should not try to execute the binaries
1271 [16777] localedata: pl_PL: incorrect thousands separator in locale
1272 [16905] localedata: hanzi: new collation
1273 [17563] localedata: cmn_TW: add hanzi collation
1274 [17750] localedata: wrong collation order of diacritics in most locales
1275 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1277 [17956] build: Build fails on missing definitions from header file
1278 nss/nss.h when Mozilla NSS is used for cryptography
1279 [18203] libc: realpath() does not handle unreachable paths correctly
1280 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1281 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1282 [18822] libc: Internal functions are called via PLT
1283 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1284 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1285 [19574] libc: glibc should support building static PIE binaries
1286 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1288 [19971] glob: glob: Do not skip entries with zero d_ino values
1289 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1290 [20008] localedata: km_KH: convert to translit_neutral
1291 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1292 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1293 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1294 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1295 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1297 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1298 they're set, wrong errors returned by gaih_inet when lookup functions
1300 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1301 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1303 [20952] localedata: yuw_PG: new locale
1304 [21084] localedata: charmaps/IBM858: new codepage
1305 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1306 [21242] libc: assert gives pedantic warning in old gcc versions
1307 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1308 __regcall calling convention
1309 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1310 [21326] libc: C99 functions are not declared for C++11 and later if
1311 _GNU_SOURCE is not predefined by g++
1312 [21457] libc: sys/ucontext.h namespace
1313 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1314 [21660] math: GCC fails to compile a formula with tgmath.h
1315 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1316 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1317 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1318 [21684] math: tgmath.h handling of complex integers
1319 [21685] math: tgmath.h handling of bit-fields
1320 [21686] math: tgmath.h handling of __int128
1321 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1323 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1325 [21750] localedata: column width of characters incompatible with classical
1327 [21754] malloc: malloc: Perform as little work as possible after heap
1328 consistency check failures
1329 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1330 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1331 [21791] string: Unused XXX_chk_XXX functions in libc.a
1332 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1334 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1336 [21845] localedata: Added new Locale bho_NP
1337 [21853] localedata: Fix abday Which looks same as day in zh_SG
1338 [21854] localedata: Added New Locale en_SC
1339 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1340 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1341 _dl_runtime_resolve_avx_slow
1342 [21885] network: getaddrinfo: gethosts does not release resolver context
1343 on memory allocation failure
1344 [21899] libc: XPG4.2 sigaction namespace
1345 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1347 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1349 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1350 errno value, causing getaddrinfo to fail
1351 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1352 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1353 instead of EAI_NODATA
1354 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1355 constant PTRACE_SEIZE_DEVEL
1356 [21930] math: C-only gcc builtins used in <math.h> isinf
1357 [21932] network: Unpaired __resolv_context_get in generic get*_r
1359 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1360 [21944] libc: sigval namespace
1361 [21951] localedata: Update hanzi collation by stroke
1362 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1363 sysdeps/x86_64/fpu/e_expf.S
1364 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1365 allocation in syscall loops)
1366 [21959] localedata: Fix Country name for xh_ZA
1367 [21960] localedata: Fix abmon for bem_ZM
1368 [21966] math: AVX2 mathvec functions use FMA without checking
1369 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1370 [21971] localedata: Added New Locale for mfe_MU
1371 [21972] libc: assert macro requires operator== (int) for its argument type
1372 [21973] math: [sparc] libm missing sqrtl compat symbol
1373 [21974] libc: Remove __bb_init_func and __bb_exit_func
1374 [21982] string: stratcliff.c: error: assuming signed overflow does not
1376 [21986] stdio: __guess_grouping is called incorrectly
1377 [21987] math: [sparc32] wrong bits/long-double.h installed
1378 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1380 [22022] localedata: Missing country_name for mni_IN
1381 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1383 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1385 [22026] locale: iconv_open: heap overflow on gconv_init failure
1386 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1387 [22035] math: [m68k] bits/math-inline.h macro namespace
1388 [22038] localedata: Fix abbreviated weeks and months for Somali
1389 [22044] localedata: Remove redundant data for Limburgish Language
1390 [22050] malloc: Linking with -lmcheck does not hook
1391 __malloc_initialize_hook correctly
1392 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1393 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1394 [22070] localedata: charmaps/UTF-8: wcwidth for
1395 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1396 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1397 Jungseong and Jongseong) should be 0
1398 [22078] nss: nss_files performance issue in multi mode
1399 [22082] math: bits/math-finite.h exp10 condition
1400 [22086] libc: pcprofiledump incorrect cross-endian condition
1401 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1402 [22095] network: Name server address allocation memory leak in resolv.conf
1404 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1406 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1407 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1409 [22111] malloc: malloc: per thread cache is not returned when thread exits
1410 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1411 [22134] libc: [linux] implement fexecve with execveat
1412 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1414 [22145] libc: ttyname() gives up too early in the face of namespaces
1415 [22146] math: C++ build issue with float128 on x86_64
1416 [22153] nptl: nptl: save error code before process termination
1417 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1418 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1419 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1420 [22165] libc: [hppa] Text relocations in libc.so
1421 [22180] libc: destructor registered via __cxa_atexit is called twice
1422 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1423 symlinks") cause "make" segfaults
1424 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1426 [22207] libc: FAIL: stdlib/test-atexit-race
1427 [22225] math: nearbyint arithmetic moved before feholdexcept
1428 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1429 [22235] math: iscanonical in C++ and float128
1430 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1431 the svid compat wrapper
1432 [22244] math: ynf and yn are wrong without the svid compat wrapper
1433 [22273] libc: Improper assert in Linux posix_spawn implementation
1434 [22284] libc: -pg -pie doesn't work
1435 [22292] locale: localedef exits with error 4 when it should be error 1
1436 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1437 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1439 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1440 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1442 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1443 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1444 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1445 [22322] libc: [mips64] wrong bits/long-double.h installed
1446 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1447 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1449 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1450 [22343] malloc: Integer overflow in posix_memalign
1451 [22347] libc: getrandom() returns the number of bytes that were copied to
1452 the buffer even though the comments say "Return 0 on success and -1 on
1454 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1455 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1457 [22370] dynamic-link: Incorrect note padding check
1458 [22375] libc: malloc returns pointer from tcache_get when should return
1459 NULL (CVE-2017-17426)
1460 [22377] math: iseqsig, float128 and C++
1461 [22382] localedata: Error in tpi_PG locale
1462 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1463 inside the ASCII printable range
1464 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1466 [22403] localedata: Slash needs escaping in some locales
1467 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1468 [22409] network: res_hnok does not accept some host names used on the
1470 [22412] network: res_dnok, res_hnok should perform syntax checks
1471 [22413] network: ns_name_pton ignores syntactically invalid trailing
1473 [22415] stdio: setvbuf can lead to invalid free/segfault
1474 [22432] build: Non-deterministic build
1475 [22439] malloc: malloc_info should compute summary statistics for all sub-
1477 [22442] network: if_nametoindex could report index for the wrong
1478 networking interface
1479 [22446] build: aliasing violation calling readlink in handle_request
1480 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1481 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1482 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1483 __nscd_hash/__nss_hash
1484 [22463] network: p_secstodate overflow handling
1485 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1486 [22478] libc: sigwait can fail with EINTR
1487 [22505] libc: ldconfig processes include directive in locale-specific
1489 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1490 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1491 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1492 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1493 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1494 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1495 same as for Croatian
1496 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1497 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1498 [22577] libc: missing newline after "cannot allocate TLS data structures
1500 [22588] manual: manual/conf.texi: missing underscore in front of
1502 [22593] math: nextafter and nexttoward are declared with const attribute
1503 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1504 [22603] string: ia64 memchr overflows internal pointer check
1505 [22605] libc: SH clone does not set the exit code correctly
1506 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1508 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1509 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1510 modified in case of success
1511 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1512 [22615] manual: manual: ambiguous wording about errno value in case of
1514 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1516 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1517 binaries or if /proc is not mounted (CVE-2017-16997)
1518 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1519 [22630] build: $(no-pie-ldflag) is no longer effective
1520 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1521 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1522 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1523 [22637] nptl: guard size is subtracted from thread stack size instead of
1525 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1526 [22657] localedata: hu_HU: Avoid double space in date
1527 [22660] math: fmax, fmin sNaN handling on alpha
1528 [22664] libc: New warning of GCC8
1529 [22665] math: alpha: ceil and floor raise inexact exceptions
1530 [22666] math: alpha: trunc raise inexact exceptions
1531 [22667] libc: makecontext lacks stack alignment on i386
1532 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1533 [22679] libc: getcwd(3) can succeed without returning an absolute path
1535 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1536 elision and tunables
1537 [22687] math: [powerpc-nofpu] complex long double functions spurious
1539 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1540 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1541 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1543 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1544 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1546 [22701] nis: Incomplete removal of libnsl
1547 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1548 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1549 [22715] dynamic-link: FAIL: elf/tst-audit10
1550 [22719] libc: Backtrace tests fail on hppa
1551 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1552 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1553 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1554 before the first call to crypt_r () in crypt/badsalttest.c
1561 * A per-thread cache has been added to malloc. Access to the cache requires
1562 no locks and therefore significantly accelerates the fast path to allocate
1563 and free small amounts of memory. Refilling an empty cache requires locking
1564 the underlying arena. Performance measurements show significant gains in a
1565 wide variety of user workloads. Workloads were captured using a special
1566 instrumented malloc and analyzed with a malloc simulator. Contributed by
1567 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1569 * Unicode 10.0.0 Support: Character encoding, character type info, and
1570 transliteration tables are all updated to Unicode 10.0.0, using
1571 generator scripts contributed by Mike FABIAN (Red Hat).
1572 These updates cause user visible changes, especially the changes in
1573 wcwidth for many emoji characters cause problems when emoji sequences
1574 are rendered with pango, see for example:
1575 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1577 * Collation of Hungarian has been overhauled and is now consistent with "The
1578 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1581 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1583 - The GNU C Library will now detect when /etc/resolv.conf has been
1584 modified and reload the changed configuration. The new resolver option
1585 “no-reload” (RES_NORELOAD) disables this behavior.
1587 - The GNU C Library now supports an arbitrary number of search domains
1588 (configured using the “search” directive in /etc/resolv.conf);
1589 previously, there was a hard limit of six domains. For backward
1590 compatibility, applications that directly modify the ‘_res’ global
1591 object are still limited to six search domains.
1593 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
1594 Library will now randomly pick a name server from the configuration as a
1595 starting point. (Previously, the second name server was always used.)
1597 * The tunables feature is now enabled by default. This allows users to tweak
1598 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1600 * New function reallocarray, which resizes an allocated block (like realloc)
1601 to the product of two sizes, with a guaranteed clean failure upon integer
1602 overflow in the multiplication. Originally from OpenBSD, contributed by
1603 Dennis Wölfing and Rüdiger Sonderfeld.
1605 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1606 These are extended versions of preadv and pwritev, respectively, taking an
1607 additional flags argument. The set of supported flags depends on the
1608 running kernel; full support currently requires kernel 4.7 or later.
1610 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1611 create a new session ID for the spawned process. This feature is
1612 scheduled to be added to the next major revision of POSIX; for the time
1613 being, it is available under _GNU_SOURCE.
1615 * errno.h is now safe to use from C-preprocessed assembly language on all
1616 supported operating systems. In this context, it will only define the
1617 Exxxx constants, as preprocessor macros expanding to integer literals.
1619 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1620 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1621 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1622 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1624 To compile programs that use this feature, the compiler must support
1625 128-bit floating point with the type name _Float128 (as defined by TS
1626 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1627 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1628 must be defined to make the new interfaces visible.
1630 The new functions and macros correspond to those present for other
1631 floating-point types (except for a few obsolescent interfaces not
1632 supported for the new type), with F128 or f128 suffixes; for example,
1633 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1634 printf or scanf formats for the new type; the strfromf128 and strtof128
1635 interfaces should be used instead.
1637 Deprecated and removed features, and other changes affecting compatibility:
1639 * The synchronization that pthread_spin_unlock performs has been changed to
1640 now be equivalent to a C11 atomic store with release memory order to the
1641 spin lock's memory location. Previously, several (but not all)
1642 architectures used stronger synchronization (e.g., containing what is
1643 often called a full barrier). This change can improve performance, but
1644 may affect odd fringe uses of spin locks that depend on the previous
1645 behavior (e.g., using spin locks as atomic variables to try to implement
1646 Dekker's mutual exclusion algorithm).
1648 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1651 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1652 will only be built and installed when the GNU C Library is configured with
1653 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1654 as TIRPC or rpcsvc-proto, to be used.
1656 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1657 libnss_compat, are deprecated, and will not be built or installed by
1660 The NIS(+) support library, libnsl, is also deprecated. By default, a
1661 compatibility shared library will be built and installed, but not headers
1662 or development libraries. Only a few NIS-related programs require this
1663 library. (In particular, the GNU C Library has never required programs
1664 that use 'gethostbyname' to be linked with libnsl.)
1666 Replacement implementations based on TIRPC, which additionally support
1667 IPv6, are available from <https://github.com/thkukuk/>. The configure
1668 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1669 name service modules, to be built and installed.
1671 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1672 support is enabled, the configured recursive resolver must support EDNS.
1673 (Responding to EDNS-enabled queries with responses which are not
1674 EDNS-enabled is fine, but FORMERR responses are not.)
1676 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1677 servers have not supported this opcode for a long time.
1679 * The _res_opcodes variable has been removed from libresolv. It had been
1680 exported by accident.
1682 * <string.h> no longer includes inline versions of any string functions,
1683 as this kind of optimization is better done by the compiler. The macros
1684 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1686 * The nonstandard header <xlocale.h> has been removed. Most programs should
1687 use <locale.h> instead. If you have a specific need for the definition of
1688 locale_t with no other declarations, please contact
1689 libc-alpha@sourceware.org and explain.
1691 * The obsolete header <sys/ultrasound.h> has been removed.
1693 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1695 * The obsolete function cfree has been removed. Applications should use
1698 * The stack_t type no longer has the name struct sigaltstack. This changes
1699 the C++ name mangling for interfaces involving this type.
1701 * The ucontext_t type no longer has the name struct ucontext. This changes
1702 the C++ name mangling for interfaces involving this type.
1704 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1705 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1706 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1707 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1708 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1709 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1710 fpregset_t type no longer has the name struct fpu. This changes the C++
1711 name mangling for interfaces involving those types.
1713 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1714 synced with the kernel:
1716 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1717 are not supported on this architecture and have been removed.
1719 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1720 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1721 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1723 Programs that assume the GET/SETREGS ptrace requests are universally
1724 available will now fail to build, instead of malfunctioning at runtime.
1726 Changes to build and runtime requirements:
1728 * Linux kernel 3.2 or later is required at runtime, on all architectures
1729 supported by that kernel. (This is a change from version 2.25 only for
1732 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1734 * On most architectures, GCC 4.9 or later is required to build the GNU C
1735 Library. On powerpc64le, GCC 6.2 or later is required.
1737 Older GCC versions and non-GNU compilers are still supported when
1738 compiling programs that use the GNU C Library. (We do not know exactly
1739 how old, and some GNU extensions to C may be _de facto_ required. If you
1740 are interested in helping us make this statement less vague, please
1741 contact libc-alpha@sourceware.org.)
1743 Security related changes:
1745 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1746 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1748 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1749 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1751 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1752 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1755 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1756 fixed (CVE-2017-12133).
1758 The following bugs are resolved with this release:
1760 [984] network: Respond to changed resolv.conf in gethostbyname
1761 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1762 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1764 [12189] libc: __stack_chk_fail should not attempt a backtrace
1766 [14096] time: Race condition on timezone/tst-timezone.out
1767 [14172] localedata: az_IR: new locale
1768 [14995] build: glibc fails to build if gold is the default linker, even if
1770 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1771 [16637] network: inet_pton function is accepting IPv6 with bad format
1772 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1773 x86 and other generic code
1774 [16875] localedata: ko_KR: fix lang_name
1775 [17225] localedata: ar_SY: localized month names for May and June are
1777 [17297] localedata: da_DK: wrong date_fmt string
1778 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1779 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1780 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1781 [19066] localedata: ar_SA abbreviated day and month names are in English
1782 [19569] network: resolv: Support an arbitrary number of search domains
1783 [19570] network: Implement random DNS server selection in the stub
1785 [19838] locale: localedef fails on PA-RISC
1786 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1787 order of 0D36 and 0D37
1788 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1790 [20098] libc: FAIL: debug/backtrace-tst on hppa
1791 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1793 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1795 [20313] localedata: Update locale data to Unicode 9.0
1796 [20424] manual: Document how to provide a malloc replacement
1797 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1799 [20686] locale: Add el_GR@euro to SUPPORTED.
1800 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1801 failures consistently
1802 [21015] dynamic-link: Document and fix --enable-bind-now
1803 [21016] nptl: pthread_cond support is broken on hppa
1804 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1805 frame-pointer on i386
1806 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1808 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1809 [21088] libc: Build fails with --enable-static-nss
1810 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1811 generic c code is used
1812 [21109] libc: Tunables broken on big-endian
1813 [21112] math: powf has large ulp errors with base close to 1 and exponent
1815 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1817 [21120] malloc: glibc malloc is incompatible with GCC 7
1818 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1820 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1821 (-0.0) when linking with -lieee
1822 [21171] math: log10, log2 and lgamma return incorrect results
1823 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1824 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1825 [21207] localedata: ce_RU: update weekdays from CLDR
1826 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1827 [21217] localedata: Update months from CLDR-31
1828 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1829 [21243] libc: support_delete_temp_file should issue warning for failed
1831 [21244] libc: support resolv_test_start() socket fd close should be
1833 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1834 new posix_spawn implementation
1835 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1836 leads to lower CPU frequency
1837 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1838 [21261] libc: [sparc64] bits/setjmp.h namespace
1839 [21267] network: [mips] bits/socket.h IOC* namespace
1840 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1841 [21270] libc: mmap64 silently truncates large offset values
1842 [21275] libc: posix_spawn always crashes on ia64 now
1843 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1844 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1845 [21289] libc: Incorrect declaration for 32-bit platforms with
1846 _FILE_OFFSET_BITS=64 causes build error
1847 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1848 not support gethostbyname4_r
1849 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1851 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1853 [21340] libc: Support POSIX_SPAWN_SETSID
1854 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1855 [21359] network: ns_name_pack needs additional byte in destination buffer
1856 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1857 against fragmentation attacks (CVE-2017-12132)
1858 [21369] network: resolv: Remove EDNS fallback
1859 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1861 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1862 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1863 [21393] stdio: Missing dup3 error check in freopen, freopen64
1864 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1865 [21399] localedata: Bad description for U00EC in
1866 localedata/charmaps/CP1254
1867 [21411] malloc: realloc documentation error
1868 [21426] network: sys/socket.h uio.h namespace
1869 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1870 [21445] libc: signal.h bsd_signal namespace
1871 [21455] network: Network headers stdint.h namespace
1872 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1874 [21475] network: resolv: Overlong search path is truncated mid-label
1875 [21511] libc: sigstack namespace
1876 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1877 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1878 bits/syscall.h: No such file or directory
1879 [21517] libc: struct sigaltstack namespace
1880 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1881 [21533] localedata: Update locale data to Unicode 10.0
1883 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1884 junk at end of line, first unrecognized character is `@'
1885 [21538] libc: SIG_HOLD missing for XPG4
1886 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1887 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1888 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1889 [21543] libc: sigevent namespace
1890 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1891 size for general purpose registers in mcontext_t structure
1892 [21550] libc: sigwait namespace
1893 [21552] libc: XPG4 bsd_signal namespace
1894 [21554] libc: sigpause namespace
1895 [21560] libc: sys/wait.h signal.h namespace
1896 [21561] libc: waitid namespace
1897 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1898 '/usr/include/stdlib.h': Permission denied
1899 [21575] libc: sys/wait.h missing struct rusage definition
1900 [21584] libc: sigaltstack etc namespace
1901 [21597] libc: siginterrupt namespace
1902 [21607] math: hppa: FAIL: math/test-tgmath
1903 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1905 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1906 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1907 stack and heap (CVE-2017-1000366)
1908 [21625] libc: wait3 namespace
1909 [21654] nss: Incorrect pointer alignment in NSS group merge result
1911 [21657] network: Parse interface zone id for node-local multicast
1912 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1914 [21666] libc: .symver is used on common symbol
1915 [21668] network: resolv: res_init cross-thread broadcast introduces race
1917 [21687] math: tgmath.h totalorder, totalordermag return type
1918 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1920 [21696] libc: Incorrect assumption of of __cpu_mask in
1921 posix/sched_cpucount.c
1922 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1923 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1925 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1926 leading to relocation crash
1927 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1928 `resolv_conf_matches (resp, conf)' failed.
1929 [21710] localedata: Added Samoan language locale for Samoa
1930 [21711] localedata: Pashto yesstr/nostr locale are missing
1931 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1932 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1933 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1934 [21723] localedata: yesstr/nostr missing for Chinese language locale
1935 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1937 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1939 [21728] localedata: New Locale for Tongan language
1940 [21729] localedata: incorrect LC_NAME fields for hi_IN
1941 [21733] localedata: yesstr and nostr are missing for zh_HK
1942 [21734] localedata: Missing yesstr and nostr are for kw_GB
1943 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1944 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1945 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1946 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1948 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1950 [21749] localedata: Wrong abbreviated day name (“abday”) for
1952 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1953 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1954 [21759] localedata: missing yesstr and nostr for Tigrinya
1955 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1956 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1957 [21767] localedata: Missing Bislama locales
1958 [21768] localedata: Missing yesstr and nostr for aa_ET
1959 [21770] localedata: Missing Field in li_NL
1960 [21778] nptl: Robust mutex may deadlock
1961 [21779] libc: MicroBlaze segfaults when loading libpthread
1962 [21783] localedata: Fix int_select international_call_prefixes
1963 [21784] localedata: Inconsistency in country_isbn
1964 [21788] localedata: Missing Country Postal Abbreviations
1965 [21794] localedata: Added-country_isbn-for-Italy
1966 [21795] localedata: Add/Fix country_isbn for France
1967 [21796] localedata: Added country_isbn for Republic of Korea
1968 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1969 [21799] localedata: Added int_select international_call_prefixes
1970 [21801] localedata: Added int_select international_call_prefixes
1971 [21804] nptl: Double semicolon in thread-shared-types.h
1972 [21807] localedata: LC_ADDRESS fix for pap_CW
1973 [21808] localedata: Fix LC_ADDRESS for pap_AW
1974 [21821] localedata: Added country_name in mai_IN
1975 [21822] localedata: Fix LC_TIME for mai_IN
1976 [21823] localedata: missing yesstr, nostr for sa_IN
1977 [21825] localedata: Fix name_mrs for mag_IN
1978 [21828] localedata: 2.26 changelog should mention user visible changes
1980 [21835] localedata: Added Maithili language locale for Nepal
1981 [21838] localedata: Removed redundant data for the_NP
1982 [21839] localedata: Fix LC_MONETARY for ta_LK
1983 [21844] localedata: Fix Latin characters and Months Sequence.
1984 [21848] localedata: Fix mai_NP Title Name
1989 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1990 24731-2:2010, is supported to enable declarations of functions from that
1991 TR. Note that not all functions from that TR are supported by the GNU C
1994 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1995 18661-1:2014, is supported to enable declarations of functions and macros
1996 from that TS. Note that not all features from that TS are supported by
1999 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
2000 18661-4:2015, is supported to enable declarations of functions and macros
2001 from that TS. Note that most features from that TS are not supported by
2004 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
2005 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
2006 Since the GNU C Library defaults to a much newer revision of POSIX, this
2007 will only affect programs that specifically request an old conformance
2008 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
2009 see a change in the visible declarations, but a program compiled with
2010 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
2013 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
2014 defined by all multithreaded code, but glibc has not required this for
2017 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
2018 means that in a future release, the macros “major”, “minor”, and “makedev”
2019 will only be available from <sys/sysmacros.h>.
2021 These macros are not part of POSIX nor XSI, and their names frequently
2022 collide with user code; see for instance glibc bug 19239 and Red Hat bug
2023 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
2024 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
2027 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
2028 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
2029 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
2031 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
2032 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
2033 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
2034 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
2035 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
2036 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
2037 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
2038 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
2039 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
2040 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
2041 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
2044 * New <math.h> features are added from TS 18661-1:2014:
2046 - Signaling NaN macros: SNANF, SNAN, SNANL.
2048 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
2049 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
2050 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
2052 - llogb functions: the llogb, llogbf and llogbl functions, and the
2053 FP_LLOGB0 and FP_LLOGBNAN macros.
2055 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
2058 - Comparison macros: iseqsig.
2060 - Classification macros: iscanonical, issubnormal, iszero.
2062 - Total order functions: totalorder, totalorderf, totalorderl,
2063 totalordermag, totalordermagf, totalordermagl.
2065 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
2067 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
2068 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
2070 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
2071 are added to libc. They convert a floating-point number into string.
2073 * Most of glibc can now be built with the stack smashing protector enabled.
2074 It is recommended to build glibc with --enable-stack-protector=strong.
2075 Implemented by Nick Alcock (Oracle).
2077 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
2078 intended to be used instead of memset() to erase sensitive data after use;
2079 the compiler will not optimize out calls to explicit_bzero even if they
2080 are "unnecessary" (in the sense that no _correct_ program can observe the
2081 effects of the memory clear).
2083 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2084 to float instead of double. This does not affect the ABI of any libraries
2085 that are part of the GNU C Library, but may affect the ABI of other
2086 libraries that use this type in their interfaces.
2088 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2089 float_t and double_t types are now defined to long double instead of float
2090 and double. These options are not the default, and this does not affect
2091 the ABI of any libraries that are part of the GNU C Library, but it may
2092 affect the ABI of other libraries that use this type in their interfaces,
2093 if they are compiled or used with those options.
2095 * The getentropy and getrandom functions, and the <sys/random.h> header file
2098 * The buffer size for byte-oriented stdio streams is now limited to 8192
2099 bytes by default. Previously, on Linux, the default buffer size on most
2100 file systems was 4096 bytes (and thus remains unchanged), except on
2101 network file systems, where the buffer size was unpredictable and could be
2102 as large as several megabytes.
2104 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2105 for the Linux quota interface which predates kernel version 2.4.22 has
2108 * The malloc_get_state and malloc_set_state functions have been removed.
2109 Already-existing binaries that dynamically link to these functions will
2110 get a hidden implementation in which malloc_get_state is a stub. As far
2111 as we know, these functions are used only by GNU Emacs and this change
2112 will not adversely affect already-built Emacs executables. Any undumped
2113 Emacs executables, which normally exist only during an Emacs build, should
2114 be rebuilt by re-running “./configure; make” in the Emacs build tree.
2116 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
2117 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2118 “no-ip6-dotint” had already been the default, and support for the
2119 “ip6-dotint” option was removed from the Internet in 2006.
2121 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2122 flag from <resolv.h> have been removed. The option relied on a
2123 backwards-incompatible DNS extension which was never deployed on the
2126 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2127 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2128 They were already unimplemented.
2130 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2131 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2132 removed again from the IETF name lookup interface specification in RFC
2133 2553. Applications should use getaddrinfo instead.
2135 * DNSSEC-related declarations and definitions have been removed from the
2136 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2137 decode the data part of DNSSEC record types. Previous versions of glibc
2138 only implemented minimal support for the previous version of DNSSEC, which
2139 is incompatible with the currently deployed version.
2141 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2142 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2143 <arpa/nameser.h> header file because the distinction between RR types and
2144 meta-RR types is not officially standardized, subject to revision, and
2145 thus not suitable for encoding in a macro.
2147 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2148 and rhook members of the res_state type in <resolv.h> have been removed.
2149 The glibc stub resolver did not support these hooks, but the header file
2150 did not reflect that.
2152 * For multi-arch support it is recommended to use a GCC which has
2153 been built with support for GNU indirect functions. This ensures
2154 that correct debugging information is generated for functions
2155 selected by IFUNC resolvers. This support can either be enabled by
2156 configuring GCC with '--enable-gnu-indirect-function', or by
2157 enabling it by default by setting 'default_gnu_indirect_function'
2158 variable for a particular architecture in the GCC source file
2161 * GDB pretty printers have been added for mutex and condition variable
2162 structures in POSIX Threads. When installed and loaded in gdb these pretty
2163 printers show various pthread variables in human-readable form when read
2164 using the 'print' or 'display' commands in gdb.
2166 * Tunables feature added to allow tweaking of the runtime for an application
2167 program. This feature can be enabled with the '--enable-tunables' configure
2168 flag. The GNU C Library manual has details on usage and README.tunables has
2169 instructions on adding new tunables to the library.
2171 * A new version of condition variables functions have been implemented in
2172 the NPTL implementation of POSIX Threads to provide stronger ordering
2175 * A new version of pthread_rwlock functions have been implemented to use a more
2176 scalable algorithm primarily through not using a critical section anymore to
2179 Security related changes:
2181 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2182 have been created with makecontext could fail to terminate due to a
2183 missing .cantunwind annotation. This has been observed to lead to a hang
2184 (denial of service) in some Go applications compiled with gccgo. Reported
2185 by Andreas Schwab. (CVE-2016-6323)
2187 * The DNS stub resolver functions would crash due to a NULL pointer
2188 dereference when processing a query with a valid DNS question type which
2189 was used internally in the implementation. The stub resolver now uses a
2190 question type which is outside the range of valid question type values.
2193 The following bugs are resolved with this release:
2195 [4099] stdio: Overly agressive caching by stream i/o functions.
2196 [7065] build: Support building glibc with -fstack-protector or -fstack-
2198 [9842] localedata: en_CA: incorrect date format
2199 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2200 before it started waiting
2201 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2202 [15765] nptl: sem_open is wrongly a cancellation point
2203 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2204 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2206 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2207 library linked with pthread
2208 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2209 "FIXME: Ingo" issue)
2210 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2211 [17252] libc: getrandom and getentropy syscall
2212 [17730] malloc: thread-local storage is sometimes improperly free()'d
2213 after being __libc_memalign()'d
2214 [18241] stdio: failed fseek on memstream does not set errno and can fail
2216 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2218 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2219 PTHREAD_PRIO_INHERIT mutex on ARM
2220 [18784] network: res_query and related function crash for special record
2221 type queries (CVE-2015-5180)
2222 [19380] math: strtod does not raise "inexact"
2223 [19387] string: Integer overflow in memchr
2224 [19390] string: Integer overflow in strncat
2225 [19398] build: linknamespace tests fail with massively parallel build
2226 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2228 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2229 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2230 [19514] libc: [PATCH] Fix spelling errors in spelling
2231 "implement"/"implementation" in several places
2232 [19582] network: Deprecate RES_USE_INET6
2233 [19673] manual: clog10 docs appear to be erroneous
2234 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2235 causes a segmentation fault
2236 [19826] libc: invalid pointer returned from __tls_get_addr with static
2238 [20016] network: resolv: Remove hooks support from the API
2239 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2241 [20033] math: [x86_64] vectorized math function don't call the __finite
2243 [20116] nptl: use after free in pthread_create
2244 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2245 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2247 [20311] nptl: please install proc_service.h
2248 [20366] libc: Compilation errors in installed headers in strict-compliance
2250 [20370] malloc: malloc: Arena free list management is still racy
2251 (incorrect fix in bug 19243)
2252 [20386] libc: assert (X = 0) does not result in GCC warning
2253 [20432] malloc: malloc: Minimize interface required for interposition
2254 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2255 in _Unwind_Backtrace (CVE-2016-6323)
2256 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2257 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2259 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2260 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2261 [20477] network: resolv: incorrect double-checked locking related to
2263 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2265 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2267 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2268 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2269 cause transition penalty
2270 [20517] math: sparcv9 missing fdiml compat symbol
2271 [20524] manual: strverscmp is inconsistent
2272 [20525] libc: <sys/quota.h> should be based on kernel headers
2273 [20539] math: GCC 7 -static -lm fails to link at -O3
2274 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2276 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2278 [20591] network: Remove obsolete DNSSEC support
2279 [20592] network: DNS resource record type classification macros in
2280 <arpa/nameser.h> are incorrect
2281 [20593] network: Update DNS RR type definitions
2282 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2283 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2285 [20629] network: libresolv: Remove support for bitstring labels
2287 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2288 assertion: "maxidx >= 2"
2289 [20660] math: [arm] Use VSQRT
2290 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2291 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2292 [20689] libc: Test for FMA should also check for AVX.
2293 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2294 [20715] math: iszero macro breaks existing code
2295 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2296 [20728] libc: powerpc: Missing TOC stub in clone
2297 [20729] build: glibc-2.24 fails to build for i486 with -Os
2298 [20750] build: Build fails with default PIE enabled gcc-6.x
2299 [20768] math: [alpha] sqrt fegetenv namespace
2300 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2302 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2303 __FLT_EVAL_METHOD__ is 2
2304 [20790] network: rpcgen buffer overrun in get_prog_declaration
2305 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2306 [20829] libc: crypt snprintf namespace
2307 [20847] libc: tst-vfork3 failure
2308 [20855] math: Default bits/mathdef.h has inappropriate float_t
2309 [20859] math: [sh4] FP_ILOGB0 invalid
2310 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2311 U+20AC), not same as GBK
2312 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2313 [20916] math: pow handling of sNaN arguments
2314 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2315 [20919] math: Bad pow (qNaN, 0) result with -lieee
2316 [20940] math: hypot sNaN handling
2317 [20947] math: fmax, fmin sNaN handling
2318 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2319 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2321 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2322 [20973] nptl: robust mutexes: Lost wake-ups
2323 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2324 [20978] nis: strlen on null pointer in nss_nisplus
2325 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2327 [21014] string: i686 memchr overflows internal pointer check
2328 [21019] libc: [mips] n32 lseek incorrect on overflow
2329 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2330 [21026] libc: [MIPS] readahead syscall is broken on n64
2331 [21028] math: Fallback fesetexceptflag should always succeed
2332 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2333 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2335 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2336 [21061] librt: [microblaze] librt lost clock_* exports
2337 [21073] libc: tunables: insecure environment variables passed to
2338 subprocesses with AT_SECURE
2339 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2343 * The minimum Linux kernel version that this version of the GNU C Library
2344 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2345 kernel version 2.6.32 or later suffices (on architectures that already
2346 required kernel versions more recent than 3.2, those requirements remain
2347 unchanged). Linux 3.2 or later kernel headers are required on all
2350 * The pap_AN locale has been deleted. This has been deprecated for a long
2351 time. It has been replaced by pap_AW & pap_CW, both of which have long
2352 been included in previous releases.
2354 * The readdir_r and readdir64_r functions have been deprecated. It is
2355 recommended to use readdir and readdir64 instead.
2357 * The type “union wait” has been removed. It was deprecated in the early
2358 1990s and never part of POSIX. Application code should use the int type
2359 instead of “union wait”.
2361 * A new NSS action is added to facilitate large distributed system
2362 administration. The action, MERGE, allows remote user stores like LDAP
2363 to be merged into local user stores like /etc/groups in order to provide
2364 easy to use, updated, and managed sets of merged credentials. The new
2365 action can be used by configuring it in /etc/nsswitch.conf:
2366 group: files [SUCCESS=merge] nis
2367 Implemented by Stephen Gallagher (Red Hat).
2369 * The deprecated __malloc_initialize_hook variable has been removed from the
2372 * The long unused localedef --old-style option has been removed. It hasn't
2373 done anything in over 16 years. Scripts using this option can safely
2376 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2377 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2378 return the next representable value in the direction of positive infinity
2379 and the nextdown functions return the next representable value in the
2380 direction of negative infinity. These are currently enabled as GNU
2383 Security related changes:
2385 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2386 could result in a stack overflow when getnetbyname was called with an
2387 overly long name. (CVE-2016-3075)
2389 * Previously, getaddrinfo copied large amounts of address data to the stack,
2390 even after the fix for CVE-2013-4458 has been applied, potentially
2391 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2392 instead. Reported by Michael Petlan. (CVE-2016-3706)
2394 * The glob function suffered from a stack-based buffer overflow when it was
2395 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2396 Reported by Alexander Cherepanov. (CVE-2016-1234)
2398 * The Sun RPC UDP client could exhaust all available stack space when
2399 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2400 alloca plugin for GCC. (CVE-2016-4429)
2402 * The IPv6 name server management code in libresolv could result in a memory
2403 leak for each thread which is created, performs a failing naming lookup,
2404 and exits. Over time, this could result in a denial of service due to
2405 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2407 The following bugs are resolved with this release:
2409 [1170] localedata: ne_NP: update Nepali locale definition file
2410 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2412 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2413 [6796] math: fdim() does not set errno on overflow
2414 [10354] libc: posix_spawn should use vfork() in more cases than presently
2415 [11213] localedata: localedata: add copyright disclaimer to locale files
2416 [12143] localedata: chr_US: new Cherokee locale
2417 [12450] localedata: sgs_LT: new locale
2418 [12676] localedata: ln_CD: new locale
2419 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2421 [13304] math: fma, fmaf, fmal produce wrong results
2422 [14259] build: --localedir arg to configure is ignored
2423 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2424 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2425 [14934] localedata: es_CL: wrong first weekday chilean locale
2426 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2428 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2430 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2431 [15368] nptl: raise() is not async-signal-safe
2432 [15479] math: ceil, floor, round and trunc raise inexact exception
2433 [15578] localedata: kk_KZ: various updates
2434 [16003] localedata: pap_AN: punt old locale
2435 [16137] localedata: iw_IL: punt old locale
2436 [16190] localedata: eo: new esperanto locale
2437 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2438 [16742] malloc: race condition: pthread_atfork() called before first
2439 malloc() results in unexpected locking behaviour/deadlocks
2440 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2442 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2443 [17565] localedata: pt_PT: wrong (work-)week start
2444 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2445 [17950] build: Build fails with -msse
2446 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2447 [18433] libc: posix_spawn does not return correctly upon failure to
2449 [18453] localedata: charmaps/IBM875: incorrect codes
2450 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2452 [18896] localedata: he_IL: improvements for currency
2453 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2454 Romanian locale data
2455 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2457 [19056] libc: Deprecate readdir_r
2458 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2460 [19198] localedata: nl_NL: small improvements for Dutch locales
2461 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2462 nameservers (CVE-2016-5417)
2463 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2465 [19400] locale: Language missing in "iso-639.def", trivial fix in
2467 [19431] malloc: Deadlock between fflush, getdelim, and fork
2468 [19505] libc: Incorrect file descriptor validity checks in
2469 posix_spawn_file_actions_add{open,close,dup2}
2470 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2471 when using RTLD_NEXT
2472 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2473 `intl/{gettextP,loadinfo}.h'
2474 [19534] libc: execle, execlp may use malloc
2475 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2476 [19573] network: res_nclose and __res_maybe_init disagree about name
2477 server initialization, breaking Hesiod
2478 [19575] localedata: Status of GB18030 tables
2479 [19581] localedata: sr_* date_fmt string contains additional newline
2480 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2482 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2483 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2484 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2485 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2487 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2489 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2491 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2492 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2493 [19633] locale: strfmon_l applies global locale to number formatting
2494 [19642] network: Memory leak in getnameinfo
2495 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2496 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2498 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2499 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2501 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2502 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2504 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2506 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2508 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2509 pointers and lengths in error-case.
2510 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2511 report errors on UTF-16 surrogates values.
2512 [19755] nscd: nscd assertion failure in gc
2513 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2514 [19759] libc: mempcpy shouldn't be inlined
2515 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2516 [19765] libc: s390 needs an optimized mempcpy
2517 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2518 NAME_MAX limit assumption (CVE-2016-1234)
2519 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2520 [19787] network: Missing and incorrect truncation checks in getnameinfo
2521 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2523 [19791] network: Assertion failure in res_query.c with un-connectable name
2525 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2526 [19822] math: libm.so install clobbers old version
2527 [19825] network: resolv: send_vc can return uninitialized data in second
2528 response to getaddrinfo
2529 [19830] network: nss_dns: should check RDATA length against buffer length
2530 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2531 confronted with A/AAAA records of invalid size
2532 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2533 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2534 [19853] stdio: Printing IBM long double in decimal with high precision is
2536 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2537 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2538 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2540 [19865] network: Assertion failure or memory leak in
2541 _nss_dns_getcanonname_r
2542 [19868] network: nss_dns: netent code does not skip over non-PTR records
2543 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2545 [19881] string: Improve x86-64 memset
2546 [19907] string: Incorrect memcpy tests
2547 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2549 [19925] libc: termios.h XCASE namespace
2550 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2551 [19929] libc: limits.h NL_NMAX namespace
2552 [19931] stdio: Memory leak in vfprintf
2553 [19957] libc: clone(CLONE_VM) access invalid parent memory
2554 [19963] localedata: en_IL: New locale
2555 [19989] stdio: stdio.h cuserid namespace
2556 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2558 [19996] locale: langinfo.h nl_langinfo_l namespace
2559 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2560 [20010] network: getaddrinfo: Stack overflow in hostent translation
2562 [20012] stdio: libio: fmemopen append mode failure
2563 [20014] stdio: stdio.h namespace for pre-threads POSIX
2564 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2565 [20023] libc: fcntl.h timespec namespace
2566 [20024] math: [x86_64] vectorized sincos trashes the stack
2567 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2568 [20041] time: sys/time.h timespec namespace
2569 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2570 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2571 [20051] libc: ttyslot in wrong header under wrong conditions
2572 [20054] libc: gethostname not declared for XPG4
2573 [20055] libc: termios.h missing tcgetsid for XPG4
2574 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2576 [20073] libc: sys/stat.h fchmod namespace
2577 [20074] libc: stdlib.h rand_r namespace
2578 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2579 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2581 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2582 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2584 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2585 [20119] libc: Wrong mask for processors level type from CPUID
2586 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2587 AS not supporting AVX512
2588 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2590 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2591 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2593 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2594 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2595 [20178] libc: posix_spawn{p} should not call exit
2596 [20191] stdio: libio: vtables hardening
2597 [20195] string: FMA4 detection requires CPUID execution with register
2599 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2600 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2602 [20212] math: acos (sNaN) returns sNaN
2603 [20213] math: asin (sNaN) returns sNaN
2604 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2605 [20218] math: [i386] asinhl (sNaN) returns sNaN
2606 [20219] math: [i386] atanhl (sNaN) returns sNaN
2607 [20222] stdio: fopencookie: Mangle function pointers
2608 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2609 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2610 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2612 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2613 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2614 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2615 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2616 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2617 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2618 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2619 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2620 [20240] math: modf (sNaN) returns sNaN
2621 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2622 [20250] math: frexp (sNaN) returns sNaN
2623 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2624 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2626 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2627 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2628 subscript is below array bounds [-Werror=array-bounds]
2629 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2630 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2632 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2633 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2635 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2636 "invalid" exceptions
2637 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2638 [20316] localedata: id_ID: Februari instead of Pebruari
2639 [20327] string: POWER8 strcasecmp returns incorrect result
2640 [20347] math: Failure: Test: j0_downward (0xap+0)
2641 [20348] libc: FAIL: misc/tst-preadvwritev64
2642 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2643 [20350] libc: There is no test for p{read,write}64
2644 [20357] math: Incorrect cos result for 1.5174239687223976
2645 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2649 * Unicode 8.0.0 Support: Character encoding, character type info, and
2650 transliteration tables are all updated to Unicode 8.0.0, using new
2651 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2652 These updates cause user visible changes, such as the fixes for bugs
2653 89, 16061, and 18568.
2655 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2656 kernel-internal CPU set size. This means that requests that change the
2657 CPU affinity which failed before (for example, an all-ones CPU mask) will
2658 now succeed. Applications that need to determine the effective CPU
2659 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2660 setting it because the kernel can adjust it (and the previous size check
2661 would not detect this in the majority of cases).
2663 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2664 the following new symbols are used: fts64_children, fts64_close,
2665 fts64_open, fts64_read and fts64_set.
2667 * getaddrinfo now detects certain invalid responses on an internal netlink
2668 socket. If such responses are received, an affected process will
2669 terminate with an error message of "Unexpected error <number> on netlink
2670 descriptor <number>" or "Unexpected netlink response of size <number> on
2671 descriptor <number>". The most likely cause for these errors is a
2672 multi-threaded application which erroneously closes and reuses the netlink
2673 file descriptor while it is used by getaddrinfo.
2675 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2676 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2677 unnecessary serialization of memory allocation requests across threads.
2678 The defect is now corrected. Users should see a substantial increase in
2679 the concurent throughput of allocation requests for applications which
2680 trigger this bug. Affected applications typically create and
2681 destroy threads frequently. (Bug 19048 was reported and analyzed by
2684 * There is now a --disable-timezone-tools configure option for disabling the
2685 building and installing of the timezone related utilities (zic, zdump, and
2686 tzselect). This is useful for people who build the timezone data and code
2687 independent of the GNU C Library.
2689 * The obsolete header <regexp.h> has been removed. Programs that require
2690 this header must be updated to use <regex.h> instead.
2692 * The obsolete functions bdflush, create_module, get_kernel_syms,
2693 query_module and uselib are no longer available to newly linked binaries;
2694 the header <sys/kdaemon.h> has been removed. These functions and header
2695 were specific to systems using the Linux kernel and could not usefully be
2696 used with the GNU C Library on systems with version 2.6 or later of the
2699 * Optimized string, wcsmbs and memory functions for IBM z13.
2700 Implemented by Stefan Liebler.
2702 * Newly linked programs that define a variable called signgam will no longer
2703 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2704 require signgam to be set by those functions must ensure that they use the
2705 variable provided by the GNU C Library and declared in <math.h>, without
2706 defining their own copy.
2708 * The minimum GCC version that can be used to build this version of the GNU
2709 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2710 still be used to compile programs using the GNU C Library.
2712 Security related changes:
2714 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2715 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2717 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2718 the pointer guard feature. It is always enabled. Previously,
2719 LD_POINTER_GUARD could be used to disable security hardening in binaries
2720 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2723 * An integer overflow in hcreate and hcreate_r could lead to an
2724 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2726 * The catopen function no longer has unbounded stack usage. Reported by
2727 Max. (CVE-2015-8779)
2729 * The nan, nanf and nanl functions no longer have unbounded stack usage
2730 depending on the length of the string passed as an argument to the
2731 functions. Reported by Joseph Myers. (CVE-2014-9761)
2733 * A stack-based buffer overflow was found in libresolv when invoked from
2734 libnss_dns, allowing specially crafted DNS responses to seize control
2735 of execution flow in the DNS client. The buffer overflow occurs in
2736 the functions send_dg (send datagram) and send_vc (send TCP) for the
2737 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2738 family. The use of AF_UNSPEC triggers the low-level resolver code to
2739 send out two parallel queries for A and AAAA. A mismanagement of the
2740 buffers used for those queries could result in the response of a query
2741 writing beyond the alloca allocated buffer created by
2742 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2743 the overflow. Thanks to the Google Security Team and Red Hat for
2744 reporting the security impact of this issue, and Robert Holiday of
2745 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2747 The following bugs are resolved with this release:
2749 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2750 [887] math: Math library function "logb" and "nextafter" inconsistent
2751 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2752 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2753 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2754 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2756 [4404] localedata: German translation of "Alarm clock" is misleading
2757 [6799] math: nextafter() and nexttoward() doen't set errno on
2758 overflow/underflow errors
2759 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2761 [10432] nis: _nss_nis_setnetgrent assertion failure
2762 [11460] libc: fts has no LFS support
2763 [12926] network: getaddrinfo()/make_request() may spin forever
2764 [13065] nptl: Race condition in pthread barriers
2765 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2766 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2768 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2769 [14912] libc: Rename non-installed bits/*.h headers
2770 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2771 [15367] math: Let gcc use __builtin_isinf
2772 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2773 [15421] math: lgamma wrongly sets signgam for ISO C
2774 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2775 FE_INVALID with argument out of range
2776 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2778 [15786] dynamic-link: ifunc resolver functions can smash function
2780 [15918] math: Unnecessary check for equality in hypotf()
2781 [16061] localedata: Review / update transliteration data
2782 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2784 [16141] time: strptime %z offset restriction
2785 [16171] math: drem should be alias of remainder
2786 [16296] math: fegetround is pure?
2787 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2788 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2790 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2791 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2793 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2794 "Exception "Inexact" set" on ppc32
2795 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2796 [16517] math: Missing underflow exception from tanf/tan/tanl
2797 [16519] math: Missing underflow exception from sinhf
2798 [16520] math: Missing underflow exception from tanhf
2799 [16521] math: Missing underflow exception from exp2
2800 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2802 [16734] stdio: fopen calls mmap to allocate its buffer
2803 [16961] math: nan function incorrect handling of bad sequences
2804 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2805 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2806 [16985] locale: localedef: confusing error message when opening output
2808 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2809 [17197] locale: Redundant shift character in iconv conversion output at
2811 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2812 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2813 [17250] dynamic-link: static linking breaks nss loading
2814 (getaddrinfo/getpwnam/etc...)
2815 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2817 [17441] math: isnan() should use __builtin_isnan() in GCC
2818 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2819 (related to lock elision)
2820 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2821 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2822 [17887] time: strptime should be able to parse "+01:00" style timezones
2823 [17905] libc: catopen() Multiple unbounded stack allocations
2825 [18084] libc: backtrace (..., 0) dumps core on x86
2826 [18086] libc: nice() sets errno to 0 on success
2827 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2828 is too large (CVE-2015-8778)
2829 [18251] dynamic-link: SONAME missing when audit modules provides path
2830 [18265] libc: add attributes for wchar string and memory functions
2831 [18370] math: csqrt missing underflows
2832 [18421] libc: [hppa] read-only segment has dynamic relocations
2833 [18472] libc: Obsolete syscall wrappers should be compat symbols
2834 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2835 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2836 [18525] localedata: Remove locale timezone information
2837 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2838 [18568] localedata: Update locale data to Unicode 8.0
2839 [18589] locale: sort-test.sh fails at random
2840 [18595] math: ctan, ctanh missing underflows
2841 [18604] libc: assert macro-expands its argument
2842 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2843 contains a vector instruction exception.
2844 [18611] math: j1, jn missing errno setting on underflow
2845 [18618] localedata: sync Chechen locale definitions with other *_RU
2847 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2848 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2849 [18665] network: In send_dg, the recvfrom function is NOT always using the
2850 buffer size of a newly created buffer (CVE-2015-7547)
2851 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2853 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2855 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2856 [18699] math: tilegx cproj() for various complex infinities does not yield
2858 [18724] libc: Harden put*ent functions against data injection
2859 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2860 [18755] build: build errors with -DNDEBUG
2861 [18757] stdio: fmemopen fails to set errno on failure
2862 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2864 [18781] libc: openat64 lacks O_LARGEFILE
2865 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2866 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2867 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2868 [18790] math: [ldbl-128ibm] tanhl inaccurate
2869 [18795] libc: stpncpy fortification misses buffer lengths that are
2870 statically too large
2871 [18796] build: build fails for --disable-mathvec
2872 [18803] math: hypot missing underflows
2873 [18820] stdio: fmemopen may leak memory on failure
2874 [18823] math: csqrt spurious underflows
2875 [18824] math: fma spurious underflows
2876 [18825] math: pow missing underflows
2877 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2878 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2879 [18870] build: sem_open.c fails to compile with missing symbol
2881 [18872] stdio: Fix memory leak in printf_positional
2882 [18873] libc: posix_fallocate overflow check ineffective
2883 [18875] math: Excess precision leads incorrect libm
2884 [18877] libc: arm: mmap offset regression
2885 [18887] libc: memory corruption when using getmntent on blank lines
2886 [18918] localedata: hu_HU: change time to HH:MM:SS format
2887 [18921] libc: Regression: extraneous stat() and fstat() performed by
2889 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2890 binaries (CVE-2015-8777)
2891 [18951] math: tgamma missing underflows
2892 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2894 [18953] localedata: lt_LT: change currency symbol to the euro
2895 [18956] math: powf inaccuracy
2896 [18961] math: [i386] exp missing underflows
2897 [18966] math: [i386] exp10 missing underflows
2898 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2899 [18969] build: multiple string test failures due to missing locale
2901 [18970] libc: Reference of pthread_setcancelstate in libc.a
2902 [18977] math: float / long double Bessel functions not in XSI POSIX
2903 [18980] math: i386 libm functions return with excess range and precision
2904 [18981] math: i386 scalb*, ldexp return with excess range and precision
2905 [18982] stdio: va_list and vprintf
2906 [18985] time: Passing out of range data to strftime() causes a segfault
2908 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2909 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2910 [19012] locale: iconv_open leaks memory on error path
2911 [19016] math: clog, clog10 inaccuracy
2912 [19018] nptl: Mangle function pointers in tls_dtor_list
2913 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2914 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2915 [19048] malloc: malloc: arena free list can become cyclic, increasing
2917 [19049] math: [powerpc] erfc incorrect zero sign
2918 [19050] math: [powerpc] log* incorrect zero sign
2919 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2920 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2921 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2922 [19074] network: Data race in _res_hconf_reorder_addrs
2923 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2924 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2925 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2927 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2929 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2930 [19086] manual: posix_fallocate64 documented argument order is wrong.
2931 [19088] math: lround, llround missing exceptions close to overflow
2933 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2934 [19095] math: dbl-64 lrint incorrect for 64-bit long
2935 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2936 [19124] dynamic-link: ld.so failed to build with older assmebler
2937 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2938 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2939 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2940 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2941 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2942 pthread_setaffinity_np
2943 [19156] math: [ldbl-128] j0l spurious underflows
2944 [19164] nptl: tst-getcpu fails with many possible CPUs
2945 [19168] math: math/test-ildoubl and math/test-ldouble failure
2946 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2947 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2949 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2950 (FE_NOMASK_ENV) do not clear SSE exceptions
2951 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2952 _int_new_arena/reused_arena
2953 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2954 [19201] math: dbl-64 remainder incorrect sign of zero result
2955 [19205] math: bits/math-finite.h conditions do not match math.h and
2957 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2958 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2959 for C99-based standards
2960 [19212] libc: features.h not -Wundef clean
2961 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2963 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2964 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2965 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2967 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2968 "inexact" exceptions
2969 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2971 [19242] libc: strtol incorrect in Turkish locales
2972 [19243] malloc: reused_arena can pick an arena on the free list, leading
2973 to an assertion failure and reference count corruption
2974 [19253] time: tzset() ineffective when temporary TZ did not include DST
2976 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2977 [19270] math: [hppa] Shared libm missing __isnanl
2978 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2979 MAP_HUGETLB and MAP_STACK defines
2980 [19313] nptl: Wrong __cpu_mask for x32
2981 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2982 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2983 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2984 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2985 [19363] time: x32: times() return value wrongly truncates/sign extends
2987 [19367] dynamic-link: Improve branch prediction on Silvermont
2988 [19369] network: Default domain name not reset by res_ninit when "search"
2989 / "domain" entry is removed from resolv.conf
2990 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2992 [19385] localedata: bg_BG: time separator should be colon, not comma
2993 [19408] libc: linux personality syscall wrapper may erroneously return an
2994 error on 32-bit architectures
2995 [19415] libc: dladdr returns wrong names on hppa
2996 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2997 IBM905, IBM907, and IBM909
2998 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2999 [19443] build: build failures with -DDEBUG
3000 [19451] build: Make check fails on test-double-vlen2
3001 [19462] libc: Glibc failed to build with -Os
3002 [19465] math: Wrong code with -Os
3003 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
3005 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
3007 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
3008 [19486] math: S390: Math tests fail with "Exception Inexact set".
3009 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
3010 [19550] libc: [mips] mmap negative offset handling inconsistent with other
3012 [19590] math: Fail to build shared objects that use libmvec.so functions.
3016 * The following bugs are resolved with this release:
3018 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
3019 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
3020 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
3021 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
3022 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
3023 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
3024 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
3025 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
3026 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
3027 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
3028 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
3029 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
3030 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
3031 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
3032 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
3033 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
3034 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
3035 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
3036 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
3037 18657, 18676, 18694, 18696, 18887.
3039 * Cache information can be queried via sysconf() function on s390 e.g. with
3040 _SC_LEVEL1_ICACHE_SIZE as argument.
3042 * A buffer overflow in gethostbyname_r and related functions performing DNS
3043 requests has been fixed. If the NSS functions were called with a
3044 misaligned buffer, the buffer length change due to pointer alignment was
3045 not taken into account. This could result in application crashes or,
3046 potentially arbitrary code execution, using crafted, but syntactically
3047 valid DNS responses. (CVE-2015-1781)
3049 * The time zone file parser has been made more robust against crafted time
3050 zone files, avoiding heap buffer overflows related to the processing of
3051 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
3052 large time zone data files. Overly long time zone specifiers in the TZ
3053 variable no longer result in stack overflows and crashes.
3055 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
3056 for LD and GD on x86 and x86-64, has been implemented. You will need
3057 binutils-2.24 or later to enable this optimization.
3059 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
3060 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
3061 Hat). These updates cause user visible changes, such as the fix for bug
3064 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
3065 and getXXbyYY NSS calls for the same database, causing a denial-of-service
3066 condition in some applications.
3068 * Added vector math library named libmvec with the following vectorized x86_64
3069 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
3071 The library can be disabled with --disable-mathvec. Use of the functions is
3072 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
3073 Shared library libmvec.so is linked in as needed when using -lm (no need to
3074 specify -lmvec explicitly for not static builds).
3075 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
3077 * A new fmemopen implementation has been added with the goal of POSIX
3078 compliance. The new implementation fixes the following long-standing
3079 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
3080 old implementation is still present for use be by existing binaries.
3082 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3083 releases. It has been fixed to match 2.19 and older, but binaries built
3084 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3086 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3087 Contributed by Roland McGrath (Google).
3089 * The header <regexp.h> is deprecated, and will be removed in a future
3090 release. Use of this header will trigger a deprecation warning.
3091 Application developers should update their code to use <regex.h> instead.
3093 This header was formerly part of SUS, but was deprecated in 1994 and
3094 removed from the standard in 2001. Also, the glibc implementation
3095 leaks memory. See BZ#18681 for more details.
3099 * The following bugs are resolved with this release:
3101 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3102 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3103 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3104 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3105 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3106 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3107 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3108 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3109 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3110 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3113 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3114 too little memory for the to-be-scanned arguments and overflow the
3115 allocated buffer. The implementation now correctly computes the required
3116 buffer size when using malloc, and switches to malloc from alloca as
3119 * A new semaphore algorithm has been implemented in generic C code for all
3120 machines. Previous custom assembly implementations of semaphore were
3121 difficult to reason about or ensure that they were safe. The new version
3122 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3123 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3124 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3126 * Port to Altera Nios II has been contributed by Mentor Graphics.
3128 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3129 implementations for powerpc64/powerpc64le.
3130 Implemented by Adhemerval Zanella (IBM).
3132 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3133 and powerpc64le. This may improve lock scaling of existing programs on
3134 HTM capable systems. The lock elision code is only enabled with
3135 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3136 powerpc will issue a transaction abort on every syscall to avoid side
3137 effects being visible outside transactions.
3139 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3140 AArch64. Contributed by ARM Ltd.
3142 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3144 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3145 under certain input conditions resulting in the execution of a shell for
3146 command substitution when the application did not request it. The
3147 implementation now checks WRDE_NOCMD immediately before executing the
3148 shell and returns the error WRDE_CMDSUB as expected.
3150 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3151 processing format strings with a large number of format specifiers.
3153 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3154 infinite loop if the DNS response contained a PTR record of an unexpected
3157 * The minimum GCC version that can be used to build this version of the GNU
3158 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3159 still be used to compile programs using the GNU C Library.
3161 * The GNU C Library is now built with -Werror by default. This can be
3162 disabled by configuring with --disable-werror.
3164 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3166 * The obsolete sigvec function has been removed. This was the original
3167 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3168 programs have been using instead for about 25 years. Of course, ABI
3169 compatibility for old binaries using sigvec remains intact.
3171 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3172 with newer versions of bison.
3174 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3175 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3176 registers overlay two consecutive single-precision registers. MIPS32R2
3177 introduced a new FPU mode (FR=1) where double-precision registers extend the
3178 corresponding single-precision registers which is incompatible with the
3179 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3180 require the use of FR=1 making a transition necessary. New o32 ABI
3181 extensions enable users to migrate over time from the original o32 ABI
3182 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3183 tracks the ABI of any loaded object and verifies that new objects are
3184 compatible. Mode transitions will also be requested as required and
3185 unsupportable objects will be rejected. The ABI checks include both soft and
3186 hard float ABIs for o32, n32 and n64.
3188 GCC 5 with GNU binutils 2.25 onwards:
3189 It is strongly recommended that all o32 system libraries are built using the
3190 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3191 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3192 compiler using --with-fp-32=xx to set this by default.
3196 * The following bugs are resolved with this release:
3198 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3199 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3200 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3201 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3202 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3203 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3204 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3205 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3206 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3207 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3208 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3209 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3210 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3211 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3212 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3214 * Reverted change of ABI data structures for s390 and s390x:
3215 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3216 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3217 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3218 are preserved pointing straight to the same implementation as the old ones.
3219 Given that, new callers will simply provide a too-big buffer to these
3220 functions. Any applications/libraries out there that embed jmp_buf or
3221 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3222 against 2.19 headers will have to rebuilt again. This is necessary in any
3223 case to revert the breakage in their ABI caused by the glibc change.
3225 * Support for file description locks is added to systems running the
3226 Linux kernel. The standard file locking interfaces are extended to
3227 operate on file descriptions, not file descriptors, via the use of
3228 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3229 are associated with an open file instead of a process.
3231 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3233 * The minimum Linux kernel version that this version of the GNU C Library
3234 can be used with is 2.6.32.
3236 * Running the testsuite no longer terminates as soon as a test fails.
3237 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3238 with PASS or FAIL lines for individual tests. A summary of the results is
3239 printed, including a list of failing lists, and "make check" exits with
3240 error status if there were any unexpected failures. "make check
3241 stop-on-test-failure=y" may be used to keep the old behavior.
3243 * The am33 port, which had not worked for several years, has been removed
3246 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3247 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3248 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3249 conflicted with POSIX (support for which was removed in 2.19), the
3250 interfaces those macros enabled remain available when compiling with
3251 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3252 test macros defined.
3254 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3256 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3257 This may improve lock scaling of existing programs on TX capable systems.
3258 The lock elision code is only built with --enable-lock-elision=yes and
3259 then requires a GCC version supporting the TX builtins. With lock elision
3260 default mutexes are elided via __builtin_tbegin, if the cpu supports
3261 transactions. By default lock elision is not enabled and the elision code
3264 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3265 copy the path argument. This allowed programs to cause posix_spawn to
3266 deference a dangling pointer, or use an unexpected pathname argument if
3267 the string was modified after the posix_spawn_file_actions_addopen
3270 * All supported architectures now use the main glibc sysdeps directory
3271 instead of some being in a separate "ports" directory (which was
3272 distributed separately before glibc 2.17).
3274 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3275 On configurations that support it (all Linux configurations), it's now
3276 used regardless of the --enable-add-ons switch to configure. It is no
3277 longer possible to build such configurations without pthreads support.
3279 * Locale names, including those obtained from environment variables (LANG
3280 and the LC_* variables), are more tightly checked for proper syntax.
3281 setlocale will now fail (with EINVAL) for locale names that are overly
3282 long, contain slashes without starting with a slash, or contain ".." path
3283 components. (CVE-2014-0475) Previously, some valid locale names were
3284 silently replaced with the "C" locale when running in AT_SECURE mode
3285 (e.g., in a SUID program). This is no longer necessary because of the
3288 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3289 with application code using Intel MPX instructions. (With all previous
3290 versions, the MPX register state could be clobbered when making calls
3291 into or out of a shared library.) Note that while the new dynamic
3292 linker is compatible with all known x86 hardware whether or not it
3293 supports Intel MPX, some x86 instruction-set emulators might fail to
3294 handle the new instruction encodings. This is known to affect Valgrind
3295 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3296 release), and might affect other tools that do instruction emulation.
3298 * Support for loadable gconv transliteration modules has been removed.
3299 The support for transliteration modules has been non-functional for
3300 over a decade, and the removal is prompted by security defects. The
3301 normal gconv conversion modules are still supported. Transliteration
3302 with //TRANSLIT is still possible, and the //IGNORE specifier
3303 continues to be supported. (CVE-2014-5119)
3305 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3306 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3307 resulting a denial-of-service security vulnerability in applications which
3308 use functions related to iconv. (CVE-2014-6040)
3312 * The following bugs are resolved with this release:
3314 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3315 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3316 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3317 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3318 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3319 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3320 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3321 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3322 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3323 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3324 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3325 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3326 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3327 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3328 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3329 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3330 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3331 16431, 16453, 16474, 16506, 16510, 16529
3333 * Slovenian translations for glibc messages have been contributed by the
3334 Translation Project's Slovenian team of translators.
3336 * The public headers no longer use __unused nor __block. This change is to
3337 support compiling programs that are derived from BSD sources and use
3338 __unused internally, and to support compiling with Clang's -fblock
3339 extension which uses __block.
3341 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3342 large collation sequences to optimize multiple passes. This cache
3343 computation may overflow for large collation sequences and may cause a
3344 stack or buffer overflow. This is now fixed to use a slower algorithm
3345 which does not use a cache if there is an integer overflow.
3347 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3348 rules for large collation sequences to optimize multiple passes and falls
3349 back to alloca if malloc fails, resulting in a possible stack overflow.
3350 The implementation now falls back to an uncached collation sequence lookup
3353 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3354 initialized for static applications resulting in the security feature
3355 being disabled. The pointer guard is now correctly initialized to a
3356 random value for static applications. Existing static applications need
3357 to be recompiled to take advantage of the fix (bug 15754).
3359 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3360 to the d_name member of struct dirent, or omit the terminating NUL
3361 character. (Bugzilla #14699).
3363 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3364 aligned_alloc functions could allocate too few bytes or corrupt the
3365 heap when passed very large allocation size values (Bugzilla #15855,
3368 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3369 for AF_INET6 has been fixed (Bugzilla #16072).
3371 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3372 pap_CW, quz_PE, the_NP.
3374 * Substantially revised locales: gd_GB, ht_HT
3376 * The LC_ADDRESS field was updated to support country_car for almost all
3379 * ISO 1427 definitions were updated.
3381 * ISO 3166 definitions were updated.
3383 * The localedef utility now supports --big-endian and --little-endian
3384 command-line options to generate locales for a different system from that
3385 for which the C library was built.
3387 * Binary locale files now only depend on the endianness of the system for
3388 which they are generated and not on other properties of that system. As a
3389 consequence, binary files generated with new localedef may be incompatible
3390 with old versions of the GNU C Library, and binary files generated with
3391 old localedef may be incompatible with this version of the GNU C Library,
3392 in the following circumstances:
3394 + Locale files may be incompatible on m68k systems.
3396 + Locale archive files (but not separate files for individual locales) may
3397 be incompatible on systems where plain "char" is signed.
3399 * The configure option --disable-versioning has been removed. Builds with
3400 --disable-versioning had not worked for several years.
3402 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3403 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3405 * SystemTap probes for malloc have been introduced.
3407 * SystemTap probes for slow multiple precision fallback paths of
3408 transcendental functions have been introduced.
3410 * Support for powerpc64le has been added.
3412 * The soft-float powerpc port now supports e500 processors.
3414 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3416 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3417 set of header declarations that are enabled by default, even when other
3418 feature test macros or compiler options such as -std=c99 would otherwise
3419 disable some of those declarations.
3421 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3422 conflict with POSIX. The libbsd-compat library (which was a dummy library
3423 that did nothing) has also been removed.
3425 * Preliminary documentation about Multi-Thread, Async-Signal and
3426 Async-Cancel Safety has been added.
3428 * Change of ABI data structures for s390 and s390x:
3429 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3430 allow for future hardware extensions. All library functions that accept or
3431 return these structures were versioned in order to provide backwards
3432 compatibility with existing code. However, not all cases can be handled
3433 with interface versioning. If an application embeds either structure into
3434 another structure and that structure is passed to another compilation unit
3435 which expects the newer larger-sized object then any access to the new
3436 fields will result in undefined behaviour. Similarly any access to fields
3437 that were moved by the enlarging of the structures will cause undefined
3438 behaviour. To fix the undefined behaviour all objects that are part of the
3439 final in-memory image must agree on the size of structures, and this may
3440 require recompilation.
3444 * The following bugs are resolved with this release:
3446 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3447 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3448 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3449 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3450 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3451 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3452 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3453 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3454 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3455 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3456 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3457 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3458 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3461 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3462 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3463 Distributions can re-enable building and using pt_chown via the new configure
3464 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3465 considerable security risks and should only be used if the distribution
3466 understands and accepts the risks.
3468 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3471 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3472 fixed (Bugzilla #15330).
3474 * Add support for calling C++11 thread_local object destructors on thread
3475 and program exit. This needs compiler support for offloading C++11
3476 destructor calls to glibc.
3478 * Improved worst case performance of libm functions with double inputs and
3481 * Support for priority inherited mutexes in pthread condition variables on
3482 non-x86 architectures.
3484 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3486 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3488 * Optimized string functions for ARM. Implemented by Will Newton and
3491 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3493 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3496 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3497 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3499 * Added a benchmark framework to track performance of functions in glibc.
3501 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3502 It is based on draft TS 18661 and currently enabled as a GNU extension.
3504 * On Linux, the clock function now uses the clock_gettime system call
3505 for improved precision, rather than old times system call.
3507 * Added support for version-3 tz format files. This is needed when using
3508 the tz database release 2013e or later, and affects a few unusual cases --
3509 currently only TZ='America/Godthab' for time stamps after 2037.
3511 * Added new API functions pthread_getattr_default_np and
3512 pthread_setattr_default_np to get and set the default pthread
3513 attributes of a process.
3515 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3516 This may improve lock scaling of existing programs on TSX capable systems.
3517 When the --enable-lock-elision=yes parameter is specified at configure
3518 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3521 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3522 availability). Implemented by Ryan S. Arnold.
3524 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3528 * The following bugs are resolved with this release:
3530 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3531 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3532 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3533 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3534 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3535 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3536 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3537 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3538 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3539 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3540 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3541 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3542 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3543 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3544 14879, 14889, 14893, 14898, 14914.
3546 * Optimization of memcpy for MIPS.
3548 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3549 EMFILE has been fixed (Bugzilla #14889).
3551 * The add-on ports collection is now distributed in the "ports" subdirectory
3552 of the main GNU C Library distribution, rather than separately.
3554 * Port to ARM AArch64 contributed by Linaro.
3556 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3557 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3559 Implemented by Andreas Krebbel.
3561 * The new function secure_getenv allows secure access to the environment,
3562 returning NULL if running in a SUID/SGID process. This function replaces
3563 the internal function __secure_getenv.
3565 * SystemTap static probes have been added into the dynamic linker.
3566 Implemented by Gary Benson.
3568 * Optimizations of string functions strstr, strcasestr and memmem.
3569 Implemented by Maxim Kuvyrkov.
3571 * The minimum Linux kernel version that this version of the GNU C Library
3572 can be used with is 2.6.16.
3574 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3575 powerpc POWER7. Implemented by Will Schmidt.
3577 * New configure option --disable-nscd builds the C library such that it
3578 never attempts to contact the Name Service Caching Daemon (nscd).
3579 New configure option --disable-build-nscd avoids building nscd itself;
3580 this is the default if --disable-nscd is used.
3582 * Improved support for cross-compilation, including cross-testing and
3583 bootstrap builds without a previously built glibc.
3585 * Several testsuite tests are now able to test multiple IFUNC variants of an
3586 interface, rather than just testing the one that would be chooen by
3589 * New configure options --with-bugurl and --with-pkgversion, for
3590 distributors to use to embed their bug-reporting and package version
3591 information in --help and --version output.
3593 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3594 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3595 allows creation of chroots without the procfs mounted on /proc.
3597 * The `crypt' function now fails if passed salt bytes that violate the
3598 specification for those values. On Linux, the `crypt' function will
3599 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3600 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3601 when the mode is enabled.
3603 * The `clock_*' suite of functions (declared in <time.h>) is now available
3604 directly in the main C library. Previously it was necessary to link with
3605 -lrt to use these functions. This change has the effect that a
3606 single-threaded program that uses a function such as `clock_gettime' (and
3607 is not linked with -lrt) will no longer implicitly load the pthreads
3608 library at runtime and so will not suffer the overheads associated with
3609 multi-thread support in other code such as the C++ runtime library.
3611 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3616 * The following bugs are resolved with this release:
3618 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3619 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3620 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3621 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3622 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3623 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3624 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3625 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3626 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3627 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3628 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3629 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3630 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3631 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3632 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3633 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3634 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3635 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3636 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3637 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3638 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3639 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3642 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3643 configuring glibc with:
3644 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3645 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3646 Implemented by H.J. Lu.
3650 + define static_assert
3652 + do not declare gets
3654 + declare at_quick_exit and quick_exit also for ISO C11
3656 + aligned_alloc. NB: The code is deliberately allows the size parameter
3657 to not be a multiple of the alignment. This is a moronic requirement
3658 in the standard but it is only a requirement on the caller, not the
3661 + timespec_get added
3663 + uchar.h support added
3665 + CMPLX, CMPLXF, CMPLXL added
3667 Implemented by Ulrich Drepper.
3669 * Support for the IA-64 has been moved to ports.
3671 * Remove support for anything but ELF binary format
3673 * Checking versions of poll, ppoll added.
3674 Implemented by Ulrich Drepper.
3676 * More generic and 64-bit performance optimizations to math functions.
3677 Implemented by Ulrich Drepper.
3679 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3680 headers and functions available at compile time as they were before
3681 version 2.14. This option will be removed at some time in the future
3682 after the TI-RPC library becomes fully sufficient for the needs of
3683 existing applications.
3685 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3686 Note that glibc is not expected to work with any Linux kernel version
3689 * New header <sys/auxv.h> and function getauxval allowing easy access to
3690 the AT_* key-value pairs passed from the Linux kernel. The header also
3691 defines the HWCAP_* bits associated with the AT_HWCAP key.
3693 * New locales: mag_IN
3695 * New configure option --enable-systemtap builds SystemTap static probes
3696 into libc for setjmp and longjmp and into libpthread for various operations.
3697 So far the setjmp/longjmp probes and some of the libpthread probes are
3698 provided only for i*86 and x86_64.
3699 Implemented by Roland McGrath and Rayson Ho.
3701 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3703 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3706 * More optimized functions for SPARC. Implemented by David S. Miller.
3708 * Improved support for cross-compilation, especially bootstrap builds
3709 without a previously built glibc.
3711 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3712 Chris Metcalf from Tilera.
3714 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3715 now supported for ARM processors.
3717 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3718 as the name of the dynamic linker, to distinguish it from the
3719 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3721 * Support for CRIS has been removed from ports.
3723 * A new class of installed header has been documented for low-level
3724 platform-specific functionality. PowerPC added the first instance with a
3725 function to provide time base register access. Contributed by Tulio
3726 Magno Quites Machado Filho.
3728 * ix86 configurations now install header files that are consistent with
3729 what x86-64 configurations install. These same header files can be used
3730 for -m32, -m64, or -mx32 builds.
3731 Contributed by H.J. Lu.
3733 * Math library bug fixes. A thorough audit of all open math library bugs was
3734 conducted by Joseph Myers. Significant progress was made on many math
3735 library bugs resulting in more accurate exceptions and function results.
3736 Many thanks to all those that contributed including Andreas Jaeger for his
3737 patch review and work on the x87 trigonometric instruction issues.
3739 * Timezone data is no longer installed. Timezone-related binaries and scripts
3740 will continue to be installed. Users should obtain their timezone data from
3741 their distribution provider or from the tzdata package at
3742 <ftp://munnari.oz.au/pub/>.
3746 * The following bugs are resolved with this release:
3748 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3749 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3750 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3751 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3752 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3753 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3754 13484, 13506, 13515, 13523, 13524, 13538, 13540
3756 * New program pldd to list loaded object of a process
3757 Implemented by Ulrich Drepper.
3759 * Add nss_db support back to glibc. No more dependency on Berkeley db
3760 and support for initgroups lookups.
3761 Implemented by Ulrich Drepper.
3763 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3764 Contributed by HJ Lu.
3766 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3767 Contributed by HJ Lu.
3769 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3770 on x86-32 and x86-64.
3771 Contributed by Liubov Dmitrieva.
3773 * Optimized strchr and strrchr for SSE on x86-32.
3774 Contributed by Liubov Dmitrieva.
3776 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3777 for x86-64 and x86-32.
3778 Contributed by Liubov Dmitrieva.
3780 * New interfaces: scandirat, scandirat64
3781 Implemented by Ulrich Drepper.
3783 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3784 Implemented by Ulrich Drepper.
3786 * nscd now also caches the netgroup database.
3787 Implemented by Ulrich Drepper.
3789 * Integrate libm with gcc's -ffinite-math-only option.
3790 Implemented by Ulrich Drepper.
3792 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3793 to math functions. Implemented by Ulrich Drepper.
3795 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3796 Implemented by Ulrich Drepper.
3798 * New Linux interfaces: process_vm_readv, process_vm_writev
3800 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3801 Implemented by Ulrich Drepper.
3803 * Optimized nearbyint and strcasecmp for PPC.
3804 Implemented by Adhemerval Zanella.
3806 * New locales: bho_IN, unm_US, es_CU, ta_LK
3810 * The following bugs are resolved with this release:
3812 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3813 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3814 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3815 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3816 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3817 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3818 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3819 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3820 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3821 12795, 12811, 12813, 12814, 12841
3823 * The RPC implementation in libc is obsoleted. Old programs keep working
3824 but new programs cannot be linked with the routines in libc anymore.
3825 Programs in need of RPC functionality must be linked against TI-RPC.
3826 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3828 Visible changes of this change include (obviously) the inability to link
3829 programs using RPC functions without referencing the TI-RPC library and the
3830 removal of the RPC headers from the glibc headers.
3831 Implemented by Ulrich Drepper.
3833 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3834 syncfs, setns, sendmmsg
3836 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3837 yue_HK, lij_IT, mhr_RU
3839 * New encodings: CP770, CP771, CP772, CP773, CP774
3841 * New program sotruss to trace calls through PLTs
3842 Implemented by Ulrich Drepper.
3844 * The malloc hook implementation is marked deprecated and will be removed
3845 from the default implementation in the next version. The design never
3846 worked ever since the introduction of threads. Even programs which do
3847 not create threads themselves can use multiple threads created internally.
3851 * The following bugs are resolved with this release:
3853 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3854 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3855 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3856 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3859 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3861 * POWER7 optimizations: memset, memcmp, strncmp
3863 * New optimized string functions for x86-64: strnlen (SSE2),
3864 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3865 Implemented by Ulrich Drepper.
3869 * The following bugs are resolved with this release:
3871 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3872 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3873 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3874 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3875 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3876 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3877 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3878 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3880 * New interfaces: pthread_getname_np, pthread_setname_np
3882 * New Linux interface: recvmmsg
3884 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3886 * The dynamic linker now recognizes supported ABI versions from the
3887 EI_ABIVERSION field in the ELF header.
3888 Implemented by Ulrich Drepper.
3890 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3891 will not be used to fill in password fields in the passwd.byname replies.
3892 Instead it is used to synthesize the shadow.byname table, should it be
3893 missing. This is a useful mode in some installations involving Solaris.
3894 Implemented by Ulrich Drepper.
3896 * New locales: kok_IN, sq_MK, cv_RU
3900 * The following bugs are resolved with this release:
3902 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3903 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3904 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3905 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3906 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3907 10789, 10817, 10823, 10840, 10847
3909 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3911 Implemented by Ulrich Drepper.
3913 * Checking version of longjmp added that fails if an uninitialized stack
3914 frame would be created. Implemented by Ulrich Drepper.
3916 * STT_GNU_IFUNC is now supported in static executables.
3917 Implemented by H.J. Lu.
3919 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3921 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3922 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3923 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3924 Contributed by H.J. Lu.
3926 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3927 Implemented by Ulrich Drepper.
3929 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3931 Contributed by H.J. Lu.
3933 * Support for fma instruction in AVX on x86-64.
3934 Implemented by H.J. Lu and Ulrich Drepper.
3936 * AVX support in x86-64 auditing support in ld.so.
3937 Implemented by H.J. Lu.
3939 * STB_GNU_UNIQUE support added.
3940 Implemented by Ulrich Drepper.
3942 * Implement second fallback mode for optimized DNS lookup for even more
3943 broken environments. If two requests from the same port are not
3944 handled correctly close the socket and open a new one before sending
3945 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3946 can be used to select this mode right away, instead of rediscovering the
3947 necessity is every process again.
3948 Implemented by Ulrich Drepper.
3950 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3951 Implemented by Adam Tkac.
3953 * Optimized iconv conversions for S390x.
3954 Implemented by Andreas Krebbel.
3956 * Using condvars with PI mutexes is now more efficient due to kernel
3957 support for requeueing to PI futexes. NPTL support added for x86-64.
3958 Implemented by Ulrich Drepper.
3960 * New locales: ps_AF, my_MM
3964 * The following bugs are resolved with this release:
3966 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3967 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3968 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3969 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3970 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3972 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3973 Implemented by Ulrich Drepper.
3975 * New Linux interfaces: accept4, fallocate, fallocate64.
3976 Implemented by Ulrich Drepper.
3978 * Correct declarations of string function when used in C++ code. This
3979 could lead to compile errors for invalid C++ code.
3981 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3984 * New POSIX 2008 interface: psiginfo
3985 Implemented by Ulrich Drepper.
3987 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3988 Implemented by Ulrich Drepper.
3990 * Support for selecting between multiple function definitions at runtime
3991 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3993 * The libcrypt library can now use the hash function implementations in
3994 NSS. Implemented by Ulrich Drepper.
3996 * The malloc implementation can be compiled to be less memory efficient
3997 but higher performing in multi-threaded programs.
3998 Implemented by Ulrich Drepper.
4000 * New locales: nan_TW@latin, ks_IN
4002 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
4003 Implemented by Ulrich Drepper.
4005 * Extended printf hook support. It is possible to use user-defined types
4006 and extend existing format specifiers.
4007 Implemented by Ulrich Drepper.
4009 * Handling for group shadow files has been added.
4010 Implemented by Ulrich Drepper.
4012 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
4013 servers (the case, e.g., for some people using the built-in DNS
4014 server in ADSL modems/routers). There is a once-per-process timeout
4015 in case of a broken server. To avoid it, users can run nscd or put
4016 'options single-request' in /etc/resolv.conf.
4017 Implemented by Ulrich Drepper.
4021 * The following bugs are resolved with this release:
4023 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
4024 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
4025 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
4026 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
4027 6968, 6974, 6980, 6995, 7008, 7009, 7029
4029 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
4030 up at the same time. Implemented by Ulrich Drepper.
4032 * TLS descriptors for LD and GD on x86 and x86-64.
4033 Implemented by Alexandre Oliva.
4035 * getaddrinfo now handles DCCP and UDPlite.
4036 Implemented by Ulrich Drepper.
4038 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
4039 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
4040 Implemented by Ulrich Drepper.
4042 * New implementation of memmem, strstr, and strcasestr which is O(n).
4043 Implemented by Eric Blake.
4045 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
4047 * Implement "e" option for popen to open file descriptor with the
4048 close-on-exec flag set. Implemented by Ulrich Drepper.
4050 * Implement "b" mode for fmemopen. In this mode writes writes don't
4051 implicitly add a NUL byte and seeks from the end of the buffer really
4052 use the buffer end, not the string length as the basis.
4053 Implemented by Ulrich Drepper.
4055 * Many functions, exported and internal, now atomically set the close-on-exec
4056 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
4058 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
4060 Implemented by Pravin Satpute.
4062 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
4066 * The following bugs are resolved with this release:
4068 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
4069 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
4070 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
4071 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
4072 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
4073 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
4074 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
4076 * New locales: bo_CN, bo_IN, shs_CA.
4078 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
4080 * Sorting rules for some Indian languages (Devanagari and Gujarati).
4081 Implemented by Pravin Satpute.
4083 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4085 * nscd caches now all timeouts for DNS entries
4086 Implemented by Ulrich Drepper.
4088 * nscd is more efficient and wakes up less often.
4089 Implemented by Ulrich Drepper.
4091 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4092 vdprintf, and obstack_vprintf.
4093 Implemented by Jakub Jelinek.
4095 * Faster memset for x86-64.
4096 Implemented by Harsha Jagasia and H.J. Lu.
4098 * Faster memcpy on x86.
4099 Implemented by Ulrich Drepper.
4101 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4102 Implemented by Ulrich Drepper.
4104 * Faster sqrt and sqrtf implemention for some PPC variants.
4105 Implemented by Steven Munroe.
4109 * The following bugs are resolved with this release:
4111 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4112 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4113 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4114 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4115 5071, 5103, 5104, 5112, 5113, 5184, 5186
4117 * More checking functions: fread, fread_unlocked, open*, mq_open.
4118 Implemented by Jakub Jelinek and Ulrich Drepper.
4120 * Extend fortification to C++. Implemented by Jakub Jelinek.
4122 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4123 by not recognizing 'a' as a modifier when those specs are requested.
4124 Implemented by Jakub Jelinek.
4126 * PPC optimizations to math and string functions.
4127 Implemented by Steven Munroe.
4129 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4130 options to be passed. Implemented by Ulrich Drepper.
4132 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4134 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4135 Implemented by Ulrich Drepper.
4137 * Handle private futexes in the NPTL implementation.
4138 Implemented by Jakub Jelinek and Ulrich Drepper.
4140 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4141 Implemented by Roland McGrath and Ulrich Drepper.
4143 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4145 * SHA-256 and SHA-512 based password encryption.
4146 Implemented by Ulrich Drepper.
4148 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4149 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4152 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4153 Implemented by Ulrich Drepper.
4157 * The following bugs are resolved with this release:
4159 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4160 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4161 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4162 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4163 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4164 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4165 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4168 * New Linux interfaces: epoll_pwait, sched_getcpu.
4170 * New generic interfaces: strerror_l.
4172 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4176 * The following bugs are resolved with this release:
4178 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4179 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4180 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4181 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4182 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4183 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4184 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4185 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4186 3225, 3251, 3252, 3253, 3273
4188 * For Linux, the sorting of addresses returned by getaddrinfo now also
4189 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4190 Implemented by Ulrich Drepper.
4192 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4193 Implemented by Ulrich Drepper.
4195 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4197 * New iconv module for MIK. Contributed by Alexander Shopov.
4199 * For sites with broken group and/or passwd database, the auto-propagate
4200 option of nscd can prevent creating ID lookup entries from the results
4201 of a name lookup and vice versa. This usually is no problem but some
4202 site might have problems with the default behavior.
4203 Implemented by Ulrich Drepper.
4205 * Iterating over entire database in NIS can be slow. With the
4206 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4207 to trade time for memory. The entire database will be read at once.
4208 Implemented by Ulrich Drepper.
4210 * The interfaces introduced in RFC 3542 have been implemented by
4213 * Support for the new ELF hash table format was added by Ulrich Drepper.
4215 * Support for priority inheritance mutexes added by Jakub Jelinek and
4218 * Support for priority protected mutexes added by Jakub Jelinek.
4220 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4221 or_IN, csb_PL, fy_NL, sr_ME.
4225 * More overflow detection functions.
4227 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4228 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4230 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4231 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4232 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4233 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4234 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4235 by Masahide Washizawa.
4237 * It is now possible to install audit libraries for the dynamic linker using
4238 LD_AUDIT. Implemented by Ulrich Drepper.
4240 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4241 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4242 For a libc and libpthread that works well on Linux 2.4 kernels, we
4243 recommend using the stable 2.3 branch.
4245 * The new function open_wmemstream acts like open_memstream,
4246 but uses a wchar_t wide character buffer.
4248 * The new function ppoll is an improved version of poll, similar to pselect.
4250 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4251 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4252 renameat, unlinkat, linkat, symlinkat, readlinkat.
4254 * New Linux kernel system calls: unshare,
4255 inotify_init, inotify_add_watch, inotify_rm_watch.
4257 * The euidaccess function is now also known by the alias eaccess,
4258 for compatibility with some other systems.
4260 * Timezone data updated to 2006b version.
4264 * The following bugs are resolved with this release:
4266 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4267 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4268 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4269 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4270 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4271 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4273 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4275 * As of this release, GCC 4 can be used to compile the C Library.
4277 * Timezone data updated to 2005m version.
4281 * The following bugs are resolved with this release:
4283 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4284 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4285 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4286 777, 787, 821, 822, 823, 825
4288 Visit <https://sourceware.org/bugzilla/> for the details of each bug.
4292 * Support for RFC 3678. Real implementations exist only for Linux so far.
4293 Implemented by Ulrich Drepper.
4295 * nscd can now cache entries persistently. Expiring entries are reloaded.
4296 For speedups the cache can be shared in memory with client processes.
4297 Implemented by Ulrich Drepper.
4299 * nscd can now perform SELinux checks.
4300 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4302 * getaddrinfo queries are now cached. Canonical name lookup is performed
4304 Implemented by Ulrich Drepper.
4306 * The nothrow function attribute is used when headers are used by gcc when
4307 compiling C code. This can avoid significant amounts of exception
4310 * The malloc functions perform more error checking and are stricter when
4311 it comes to reacting on errors. The default action is to terminate
4312 the process after showing an error message. Implemented by Ulrich Drepper.
4314 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4315 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4317 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4318 namespaces using the new function dlmopen(). This feature is of course,
4319 like most other dynamic loading functionality, not available in statically
4320 linked applications. Implemented by Ulrich Drepper.
4322 * Low-overhead boundary checking variants of string and some stdio functions
4323 were added. These are to be used in conjunction with a gcc patch by
4324 Jakub Jelinek which adds calls to these functions if possible.
4325 Implemented by Jakub Jelinek and Ulrich Drepper.
4327 * Old code for several operating systems and machine architectures that
4328 have not been in working condition in a long time have been removed from
4329 the main source tree maintained by the GNU C Library's maintainers.
4330 These files are now reside in the separate `ports' source module
4331 that is usable as an add-on when building the library.
4335 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4336 interrogate the dynamic linker, compatible with the Solaris interface.
4338 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4339 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4341 * getifaddrs now uses the netlink interface on Linux to get its information.
4342 Implemented by Thorsten Kukuk.
4344 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4345 Implemented by Ulrich Drepper.
4347 * support for non-executable stacks on x86 has been added. Changes mostly
4350 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4353 * getaddrinfo now performs destination address selection according to
4358 * Thread-safe interfaces for many functions that access locale data
4359 were added in version 2.3, but these features were omitted from NEWS.
4360 Many functions have variants with an `_l' suffix that take a `locale_t'
4361 object as a parameter rather than consulting the current locale.
4362 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4363 create and maintain `locale_t' objects. Additionally, the new function
4364 `uselocale' sets "the current locale" (as used by functions not so
4365 parameterized) set for an individual thread. These features were added
4366 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4368 * The functions getresuid, getresgid, setresuid, and setresgid, which
4369 have long been available on Linux, are now declared in <unistd.h>
4370 and are now also available on the Hurd.
4372 * ELF thread-local storage support (TLS) now works on x86-64.
4374 * The new dynamic string token $LIB is expanded in shared library names.
4375 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4377 * Aldy Hernandez contributed complete software floating point support for
4378 PowerPC machines with no FPU.
4380 * fexecve is implemented on Linux.
4382 * The `btowc' function should work at least twice as fast due to
4383 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4385 * With approriate thread add-ons cancelable functions are now implemented
4386 in libc.so as well. No need to call the function in libpthread. This
4387 change allowed to finally disable the incorrect and expensive handling
4388 of weak definition in ld.so.
4390 * Yet more PLT entries in libc.so have been removed. We finally arrived
4391 at the bare minimum. Startup times improved appropriately.
4393 * Support for the new Linux/x86 system call interface was added. The
4394 AT_SYSINFO auxiliary vector entry is recognized and handled.
4398 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4401 * iconv (the program and the interface) now accepts empty names (excluding
4402 options like //TRANSLIT) to mean "use charset of current locale".
4404 * localedef can now transliterate characters in strings which are not in
4405 the provided charmap. The information from the input locale is used.
4407 * Prelinking support was added for ELF targets. This requires additional
4408 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4410 * Read-only stdio streams now use mmap to speed up operation by eliminating
4411 copying and buffer underflows. To use add 'm' to the mode string of
4412 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4414 * The malloc functions were completely rewritten by Wolfram Gloger based
4415 on Doug Lea's malloc-2.7.0.c.
4417 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4418 implementation of regex.
4420 * Bruno Haible upgraded the iconv and locale implementation to support
4423 * Contents of the LC_* and LANG environment variables in the CEN style are
4424 not recognized anymore. It never was used. Change by Ulrich Drepper.
4426 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4427 thread-local storage (TLS) ABI on some platforms.
4428 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4430 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4431 EUC-JISX0213, and TSCII.
4433 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4434 BSD-compatible interface for getting all network interface addresses.
4435 Implementation for IPv4 by Roland McGrath.
4437 * Loading of locale data is faster due to the introduction of a locale
4438 archive. Implemented by Roland McGrath and Ulrich Drepper.
4440 * Startup times are significantly reduced by not using exported functions
4441 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4444 * Steven Munroe contributed a port to PowerPC64/Linux.
4448 * The Hurd now uses the GNU libio implementation of stdio rather than the
4449 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4451 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4452 with the same behavior as the Linux system call of the same name.
4456 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4457 128-bit long double format.
4459 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4460 IBM1161, and IBM1162 charsets.
4462 * Andreas Jaeger contributed a port to x86-64/Linux.
4464 * Peter Bruin contributed a port to PowerPC/Hurd.
4466 * libc functions using I/O streams now can handle wide-oriented streams
4469 * optimizations in the dynamic linker. Binaries created by recent binutils
4470 versions start up quicker due to reduced time spent on relocations.
4472 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4476 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4477 asinh, atanh, j0 for the 128-bit long double format.
4479 * Bruno Haible updated all the code handling Unicode in some form to
4480 support Unicode 3.1.
4482 * Speed of regex for single-byte locales is back to previous levels.
4483 Patch by Isamu Hasegawa.
4485 * Alpha, SPARC, and IA-64 now also using floating stacks.
4487 * Startup time of internationalized applications greatly improved through
4488 iconv cache. Use iconvconfig to generate the cache file.
4489 Contributed by Ulrich Drepper.
4491 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4492 severe performance problems. Patch by David Mosberger.
4494 * The Hurd port got a lot more functionality like AIO, various stdio
4495 extensions, etc. Mainly done by Roland McGrath.
4497 * mtrace can now lookup symbols in shared libraries.
4501 * Intel's IA-64 math library is largely integrated. It provides fast and
4502 accurate implementatations for most basic and standard math functions
4503 in float, double, and long double format.
4505 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4506 and asin for the 96-bit long double format and asin, log, tan for the
4507 128-bit long double format.
4509 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4510 The basic double functions exist today. Contributed by Abraham Ziv
4511 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4512 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4514 * An asynchronous name lookup library was added. The interface is designed
4515 after POSIX AIO. The proposal was circulated beforehand to get comments.
4516 No negative ones came in. Implemented by Ulrich Drepper.
4518 * Port to S390/64bit contributed by Martin Schwidefsky
4519 <schwidefsky@de.ibm.com>.
4521 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4522 of functions for Linux/IA-64.
4524 * The RPC code is now thread safe. Threads can now use the same service
4525 of different services at the same time. Patch by Eric Norum
4526 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4528 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4529 family of functions for Linux/S390.
4531 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4532 of functions for Linux/x86.
4534 * Port to Linux/CRIS contributed by Axis Communications.
4538 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4539 we can now check for namespace violations and missing declarations. The
4540 result is that almost all headers are now Unix-compliant (as defined in
4541 the upcoming XPG6). The negative side is that some programs might need
4542 corrections, too, if they depend on the incorrect form of the headers in
4543 previous versions which defined too many symbols and included too many
4546 * regex now handles multibyte character sets correctly.
4547 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4549 * iconv (the program) does now conform to the upcoming XPG6 and handles
4550 charmaps. Instead of the charset names the path of charmaps can be
4551 provided and the conversion happens based on this data.
4552 Contributed by Ulrich Drepper.
4554 * The locale program now provides detailed information about the installed
4559 only lists the names of the supported locales
4563 provides details such as country, language, and codeset name.
4564 Contributed by Ulrich Drepper.
4568 * The gencat program now parses the input file according to the charset
4569 selected by the LC_CTYPE category. This is important for stateful
4570 character sets. To make generating catalogs easier there is a way
4571 to overwrite the charset selected by the locale: before the first
4572 message or $ quote line the catalog can contain a line like
4574 $ codeset=ISO-8859-2
4576 to select the charset (ISO-8859-2 in this case).
4578 Implemented by Shinya Hanataka and Ulrich Drepper.
4580 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4581 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4582 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4584 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4585 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4587 * The LANGUAGE environment variable is now ignored unless the locale is
4588 changed from the default "C" locale.
4590 * The usual bug fixes.
4594 * Greg McGary added runtime support for bounds checking using gcc's
4595 new -fbounded-pointers option. ix86 target is complete. PowerPC
4598 * Thorsten Kukuk added secure mode support to nscd.
4600 * The Berkeley db libraries have been removed.
4602 Related, the nss_db module is now in a separate package since it
4603 obviously requires a database library being available.
4605 * Wide character I/O streams implemented by Ulrich Drepper.
4607 * Functions from the extended socket API added by Ulrich Drepper.
4609 * Functions feenableexcept and fedisableexcept to control the
4610 behaviour of individual exceptions have been added by Andreas Jaeger.
4612 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4614 * The resolver code has been updated from bind 8.2.3-T5B which supports
4615 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4618 This change could in some situations effect backward compatibility. Since
4619 now `_res' is a thread-local instead of a global variable, modifying it
4620 in one thread does not have any effect in other threads.
4622 The resolver library was also extended to allow IPv6 as the transport
4623 protocol for the requests. This work was done by Stig Venaas.
4625 * Compatibility code for K&R C compilers has been removed from the
4626 header files. A ISO C compiler is needed to use the library
4627 (conforming to either C89 or C99 standard).
4629 * Complete rewrite of the localedef program to support multibyte character
4630 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4631 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4632 Implemented by Ulrich Drepper.
4634 Bruno Haible significantly improved the generation and use of the data
4635 structures for the wide character tables.
4637 * Plural handling in gettext implemented by Ulrich Drepper.
4639 * The utmp daemon has been removed.
4641 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4643 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4646 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4648 * POSIX barriers implemented by Kaz Kylheku.
4650 * POSIX spawn function family implemented by Ulrich Drepper.
4652 * POSIX spinlocks are now available.
4654 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4656 * the configure option --enable-kernel=X.Y.Z allows to strip out
4657 compatibility for kernel versions before X.Y.Z. This is currently only
4658 implemented for Linux.
4660 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4661 field sin6_scope_id. This means that all programs using IPv6 should be
4662 recompiled. Don't expect binary compatibility with previous glibc
4665 * various conversion modules for IBM character sets contributed by
4668 * IA-64 port by Jes Sorensen and HJ Lu.
4682 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4684 * New xdr functions are added; some rpc functions are now 64bit clean.
4686 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4688 * Fixed known incompatibilities with glibc 2.0.
4690 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4692 * Optimized a number of functions (especially the ELF dynamic loader).
4694 * Update timezone data files.
4696 * lots of charmaps corrections
4698 * some new locale definitions and charmaps
4703 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4704 conform to POSIX member type requirements. Symbol versions have been
4705 adjusted as needed within the library, and for direct use by applications,
4706 but there is potential for problems if third-party libraries use
4707 struct timeval as part of their interface. This does not present
4708 a problem for X and other "essential" system libraries.
4710 * An additional locale model to support C++ Standard Library locale
4711 model and probably more was implemented by Ulrich Drepper.
4713 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4716 * Miles Bader provided the `argp' function family to support hierachical
4717 command line argument parsing, layered on top of getopt.
4719 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4721 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4724 * scanf recognizes the %a and %A format for scanning floating point numbers.
4726 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4727 information and interfaces for the available integer types.
4729 * about 130 new math functions were added to implement the ISO C9x math
4732 * the new header <complex.h> contains definitions of the complex math
4733 functions from ISO C 9X.
4735 * the new header <tgmath.h> defines generic macros to use complex or
4736 real valued functions.
4738 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4740 * Andreas Jaeger provided a test suite for the math library.
4742 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4744 * Ulrich Drepper added character set conversion functions (iconv).
4746 * Optimized string functions have been added.
4748 * The localedata addon is now part of glibc.
4750 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4752 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4753 daemon for NSS (nscd).
4755 Missing a better place here are some numbers on improvements. Under
4756 Linux 2.1.125 un-tar-ing the kernel sources takes
4760 using local files 12.19s 6.88s 22.91s
4762 using NIS 13.92s 8.91s 26.34s
4764 using NIS & nscd 10.37s 7.34s 25.30s
4766 using NIS+ 27.57s 30.37s 640.46s
4768 using NIS+ & nscd 10.25s 7.83s 26.51s
4770 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4772 Keep in mind that non-namelookup related operations dominate above times.
4773 It was just a common complain that using NIS+ unpacking the kernel is
4776 [1] The old nscd implementation is not available anymore since it was
4777 distributed with glibc up to version 2.0.98 and thus is now replaced.
4779 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4781 * Mark Kettenis provided a Hesiod NSS module.
4783 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4784 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4786 * rcmd can now handle netgroups (Dick Streefland).
4788 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4791 * Support for the IPv6 protocol has been added to the socket API, as per the
4792 latest draft standards.
4794 * Support for Linux 2.2 has been added.
4796 * Interface changes relative to the latest 2.0.x release:
4797 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4798 addseverity NEW: Unix98
4799 alphasort64 NEW: LFS
4800 argp_err_exit_status NEW: argp, GNU ext
4801 argp_error NEW: argp, GNU ext
4802 argp_failure NEW: argp, GNU ext
4803 argp_help NEW: argp, GNU ext
4804 argp_parse NEW: argp, GNU ext
4805 argp_program_bug_address NEW: argp, GNU ext
4806 argp_program_version NEW: argp, GNU ext
4807 argp_program_version_hook NEW: argp, GNU ext
4808 argp_state_help NEW: argp, GNU ext
4809 argp_usage NEW: argp, GNU ext
4810 authdes_create NEW: Secure RPC
4811 authdes_getucred NEW: Secure RPC
4812 authdes_pk_create NEW: Secure RPC
4813 backtrace NEW: GNU ext.
4814 backtrace_symbols NEW: GNU ext.
4815 backtrace_symbols_fd NEW: GNU ext.
4817 cacosf NEW: ISO C 9x
4818 cacosh NEW: ISO C 9x
4819 cacoshf NEW: ISO C 9x
4820 cacoshl NEW: ISO C 9x
4821 cacosl NEW: ISO C 9x
4828 casinf NEW: ISO C 9x
4829 casinh NEW: ISO C 9x
4830 casinhf NEW: ISO C 9x
4831 casinhl NEW: ISO C 9x
4832 casinl NEW: ISO C 9x
4834 catanf NEW: ISO C 9x
4835 catanh NEW: ISO C 9x
4836 catanhf NEW: ISO C 9x
4837 catanhl NEW: ISO C 9x
4838 catanl NEW: ISO C 9x
4839 cbc_crypt NEW: Secure RPC
4843 ccoshf NEW: ISO C 9x
4844 ccoshl NEW: ISO C 9x
4850 cimagf NEW: ISO C 9x
4851 cimagl NEW: ISO C 9x
4852 clearerr_locked REMOVED
4853 clntunix_create NEW: sunrpc ext
4855 clog10 NEW: ISO C 9x
4856 clog10f NEW: ISO C 9x
4857 clog10l NEW: ISO C 9x
4867 cprojf NEW: ISO C 9x
4868 cprojl NEW: ISO C 9x
4870 crealf NEW: ISO C 9x
4871 creall NEW: ISO C 9x
4876 csinhf NEW: ISO C 9x
4877 csinhl NEW: ISO C 9x
4880 csqrtf NEW: ISO C 9x
4881 csqrtl NEW: ISO C 9x
4885 ctanhf NEW: ISO C 9x
4886 ctanhl NEW: ISO C 9x
4888 des_setparity NEW: Secure RPC
4889 ecb_crypt NEW: Secure RPC
4890 endutxent NEW: Unix98
4892 exp10f NEW: ISO C 9x
4893 exp10l NEW: ISO C 9x
4897 fattach NEW: STREAMS
4898 fdetach NEW: STREAMS
4902 feclearexcept NEW: ISO C 9x
4903 fegetenv NEW: ISO C 9x
4904 fegetexceptflag NEW: ISO C 9x
4905 fegetround NEW: ISO C 9x
4906 feholdexcept NEW: ISO C 9x
4908 feraiseexcept NEW: ISO C 9x
4909 ferror_locked REMOVED
4910 fesetenv NEW: ISO C 9x
4911 fesetexceptflag NEW: ISO C 9x
4912 fesetround NEW: ISO C 9x
4913 fetestexcept NEW: ISO C 9x
4914 feupdateenv NEW: ISO C 9x
4915 fflush_locked REMOVED
4919 fgets_unlocked NEW: GNU ext.
4920 fileno_locked REMOVED
4932 fputc_locked REMOVED
4933 fputs_unlocked NEW: GNU ext.
4934 fread_unlocked NEW: GNU ext.
4939 fstatvfs NEW: Unix98
4943 ftruncate64 NEW: LFS
4945 fwrite_unlocked NEW: GNU ext.
4946 gai_strerror NEW: IPv6
4950 getchar_locked REMOVED
4952 getdate_err NEW: Unix98
4953 getdate_r NEW: GNU ext.
4955 getnameinfo NEW: IPv6
4956 getnetname NEW: Secure RPC
4957 getpmsg NEW: STREAMS
4958 getpt NEW: Unix98 PTY
4959 getrlimit64 NEW: LFS
4960 getutxent NEW: Unix98
4961 getutxid NEW: Unix98
4962 getutxline NEW: Unix98
4963 glob64 NEW: GNU ext.
4964 globfree64 NEW: GNU ext.
4965 gnu_get_libc_release NEW: GNU ext.
4966 gnu_get_libc_version NEW: GNU ext.
4967 grantpt NEW: Unix98 PTY
4968 host2netname NEW: Secure RPC
4970 iconv_close NEW: iconv
4971 iconv_open NEW: iconv
4972 if_freenameindex NEW: IPv6
4973 if_indextoname NEW: IPv6
4974 if_nameindex NEW: IPv6
4975 if_nametoindex NEW: IPv6
4976 in6addr_any NEW: IPv6
4977 in6addr_loopback NEW: IPv6
4978 inet6_isipv4mapped NEW: IPv6
4979 isastream NEW: STREAMS
4980 iswblank NEW: GNU ext.
4981 key_decryptsession NEW: Secure RPC
4982 key_decryptsession_pk NEW: Secure RPC
4983 key_encryptsession NEW: Secure RPC
4984 key_encryptsession_pk NEW: Secure RPC
4985 key_gendes NEW: Secure RPC
4986 key_get_conv NEW: Secure RPC
4987 key_secretkey_is_set NEW: Secure RPC
4988 key_setnet NEW: Secure RPC
4989 key_setsecret NEW: Secure RPC
4990 llrint NEW: ISO C 9x
4991 llrintf NEW: ISO C 9x
4992 llrintl NEW: ISO C 9x
4993 llround NEW: ISO C 9x
4994 llroundf NEW: ISO C 9x
4995 llroundl NEW: ISO C 9x
5000 lrintf NEW: ISO C 9x
5001 lrintl NEW: ISO C 9x
5002 lround NEW: ISO C 9x
5003 lroundf NEW: ISO C 9x
5004 lroundl NEW: ISO C 9x
5006 makecontext NEW: Unix98
5007 mempcpy NEW: GNU ext.
5010 modify_ldt NEW: kernel
5014 nearbyint NEW: ISO C 9x
5015 nearbyintf NEW: ISO C 9x
5016 nearbyintl NEW: ISO C 9x
5017 netname2host NEW: Secure RPC
5018 netname2user NEW: Secure RPC
5019 nexttoward NEW: ISO C 9x
5020 nexttowardf NEW: ISO C 9x
5021 nexttowardl NEW: ISO C 9x
5025 passwd2des NEW: Secure RPC
5027 pow10f NEW: GNU ext.
5028 pow10l NEW: GNU ext.
5031 printf_size NEW: GNU ext.
5032 printf_size_info NEW: GNU ext.
5033 profil_counter REMOVED
5034 pthread_mutexattr_getkind_np REPLACED
5035 pthread_mutexattr_setkind_np REPLACED
5036 ptsname NEW: Unix98 PTY
5037 ptsname_r NEW: Unix98 PTY
5039 putchar_locked REMOVED
5040 putgrent NEW: GNU ext.
5042 putpmsg NEW: STREAMS
5043 pututxline NEW: Unix98
5047 readdir64_r NEW: LFS
5048 remquo NEW: ISO C 9x
5049 remquof NEW: ISO C 9x
5050 remquol NEW: ISO C 9x
5052 roundf NEW: ISO C 9x
5053 roundl NEW: ISO C 9x
5055 scalbln NEW: ISO C 9x
5056 scalblnf NEW: ISO C 9x
5057 scalblnl NEW: ISO C 9x
5059 sendfile NEW: kernel
5060 setcontext NEW: Unix98
5061 setrlimit64 NEW: LFS
5062 setutxent NEW: Unix98
5064 sigignore NEW: Unix98
5065 sigqueue NEW: POSIX.1b
5066 sigrelse NEW: Unix98
5067 sigset NEW: POSIX.1b
5068 sigtimedwait NEW: POSIX.1b
5069 sigwaitinfo NEW: POSIX.1b
5070 sincos NEW: GNU ext.
5071 sincosf NEW: GNU ext.
5072 sincosl NEW: GNU ext.
5076 strcasestr NEW: GNU ext.
5077 strtoimax NEW: ISO C 9x
5078 strtoumax NEW: ISO C 9x
5079 strverscmp NEW: GNU ext.
5080 svcauthdes_stats NEW: Secure RPC
5081 svcunix_create NEW: sunrpc etx
5082 svcunixfd_create NEW: sunrpc ext
5083 swapcontext NEW: Unix98
5084 tcgetsid NEW: Unix98 PTY
5085 tdestroy NEW: GNU ext.
5086 tgamma NEW: ISO C 9x
5087 tgammaf NEW: ISO C 9x
5088 tgammal NEW: ISO C 9x
5092 truncf NEW: ISO C 9x
5093 truncl NEW: ISO C 9x
5095 unlockpt NEW: Unix98 PTY
5096 updwtmpx NEW: Unix98
5097 user2netname NEW: Secure RPC
5098 utmpxname NEW: Unix98
5099 versionsort NEW: GNU ext.
5100 versionsort64 NEW: GNU ext.
5102 wcscasecmp NEW: GNU ext.
5103 wcsncasecmp NEW: GNU ext.
5104 wcsnlen NEW: GNU ext.
5105 wcstoimax NEW: ISO C 9x
5106 wcstoll NEW: ISO C 9x
5107 wcstoull NEW: ISO C 9x
5108 wcstoumax NEW: ISO C 9x
5110 wordexp NEW: POSIX.2
5111 wordfree NEW: POSIX.2
5112 write_profiling REMOVED
5113 xdecrypt NEW: Secure RPC
5114 xdr_authdes_cred NEW: Secure RPC
5115 xdr_authdes_verf NEW: Secure RPC
5116 xdr_cryptkeyarg NEW: Secure RPC
5117 xdr_cryptkeyarg2 NEW: Secure RPC
5118 xdr_cryptkeyres NEW: Secure RPC
5119 xdr_getcredres NEW: Secure RPC
5120 xdr_key_netstarg NEW: Secure RPC
5121 xdr_key_netstres NEW: Secure RPC
5122 xdr_keybuf NEW: Secure RPC
5123 xdr_keystatus NEW: Secure RPC
5124 xdr_netnamestr NEW: Secure RPC
5125 xdr_sizeof NEW: Secure RPC
5126 xdr_unixcred NEW: sunrpc ext
5127 xencrypt NEW: Secure RPC
5128 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5139 * inet_ntoa is thread-safe
5141 * updwtmp is moved from libutil to libc
5143 * rewrite of cbrt function
5145 * update of timezone data
5159 * add atoll function
5161 * fix complex problems in Berkeley DB code
5163 * fix math functions
5167 * fixed lots of header problems (especially Linux/GNU specific)
5169 * dynamic loader preserves all registers
5171 * Roland McGrath provided support for handling of auxiliary objects in
5172 the ELF dynamic loader.
5174 * support for parallel builds is improved
5178 * GNU extensions are no longer declared by default. To enable them you
5179 must define the macro `_GNU_SOURCE' in your program or compile with
5182 * The library has changed from using GNU ld symbol aliases to using weak
5183 symbols where available. The ELF object file format supports weak
5184 symbols; GNU ld also supports weak symbols in the a.out format. (There
5185 is also now support for other GNU ld extensions in ELF. Use the
5186 `--with-elf' option to configure to indicate you have ELF, and
5187 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5188 of many files which contained only symbol aliases, reducing the size of
5189 the source and the compiled library; many other files were renamed to
5190 less cryptic names previously occupied by the symbol alias files.
5191 There is a new header file <elf.h> for programs which operate on
5192 files in the ELF format.
5194 * Converted to Autoconf version 2, so `configure' has more options.
5195 Run `configure --help' to see the details.
5197 * The library can now be configured to build profiling, highly-optimized
5198 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5199 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5200 `configure' enable building these extra libraries. The shared library is
5201 built by default when using both ELF and GNU ld. When shared libraries
5202 are enabled, the new library `-ldl' is available for arbitrary run-time
5203 loading of shared objects; its interface is defined in <dlfcn.h>. The
5204 new header file <link.h> gives access to the internals of the run-time
5205 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5206 application of same name on other systems and it provides information
5207 about dynamically linked binaries.
5209 * The C library now provides the run-time support code for profiling
5210 executables compiled with `-pg'. Programs can control the profiling code
5211 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5212 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5213 the support for this file format was contributed by David Mosberger-Tang.
5215 * The math code has been replaced with a math library based on fdlibm from
5216 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5217 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5218 functions. The math functions now reside in a separate library, so
5219 programs using them will need to use `-lm' their linking commands.
5221 * John C. Bowman contributed optimized ix87 assembler inline functions.
5223 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5224 mechanism similar to that found in Solaris 2. This is now used for the
5225 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5226 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5227 file controls what services are used for each individual database. This
5228 works by loading shared libraries with names specified in `nsswitch.conf',
5229 so service modules can be changed or added at any time without even
5230 relinking any program. Currently there are the file, db, and NIS based
5231 NSS services available.
5233 * The new functions `strtoq' and `strtouq' parse integer values from
5234 strings, like `strtol' and `strtoul', but they return `long long int' and
5235 `unsigned long long int' values, respectively (64-bit quantities).
5237 * The new functions `strtof' and `strtold' parse floating-point values from
5238 strings, like `strtod', but they return `float' and `long double' values,
5239 respectively (on some machines `double' and `long double' are the same).
5241 * Ulrich Drepper has contributed new implementations of the floating-point
5242 printing and reading code used in the `printf' family of functions and
5243 `strtod', `strtof', and `strtold'. These new functions are perfectly
5244 accurate, and much faster than the old ones.
5246 * The implementation of the POSIX locale model was completely rewritten by
5247 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5248 to compile the POSIX locale definition.
5250 * The former dummy implementations of the strcoll and strxfrm function are
5251 now replaced by fully functional code contributed by Ulrich Drepper. The
5252 collation information comes from the POSIX locale definitions.
5254 * The new header <langinfo.h> defines an interface for accessing
5255 various locale-dependent data (using the locale chosen with `setlocale').
5257 * Ulrich Drepper has contributed a new suite of functions for operation on
5258 wide-character and multibyte-character strings, in <wchar.h>;
5259 and classification and case conversion of wide characters, in <wctype.h>.
5260 These new functions are conforming to the ISO C, Amendement 1 specification.
5262 * There is now a second implementation of the standard I/O library available.
5263 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5264 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5266 * You can now use positional parameter specifications in format strings
5267 for the `printf' and `scanf' families of functions. For example,
5268 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5269 ``Number 6, Mr Jones''. This is mainly useful when providing different
5270 format strings for different languages, whose grammars may dictate
5271 different orderings of the values being printed. To support this
5272 feature, the interface for `register_printf_handler' has changed; see
5273 the header file <printf.h> for details.
5275 * The `printf' and `scanf' families of functions now understand a new
5276 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5277 to group numbers as indicated by the locale; for `scanf' and friends, this
5278 says to accept as valid only a number with all the proper grouping
5279 separators in the right places. In the default "C" locale, numbers are
5280 not grouped; but locales for specific countries will define the usual
5281 conventions (i.e. separate thousands with `,' in the US locale).
5283 * The pgrp functions have been regularized, slightly incompatibly but much
5284 less confusingly. The core functions are now `getpgid' and `setpgid',
5285 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5286 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5287 provided for compatibility. There is no longer an incompatible `getpgrp'
5288 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5290 * The new header file <fts.h> and suite of functions simplify programs that
5291 operate on directory trees. This code comes from 4.4 BSD.
5293 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5294 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5295 NSS scheme used in glibc.
5297 * There is a new malloc debugging hook `__memalign_hook'.
5299 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5300 `unsigned int' in <sys/types.h>. These are for compatibility only and
5301 their use is discouraged.
5303 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5304 done differently, so that it works even without GNU ld.
5306 * New function `euidaccess' checks allowed access to a file like `access',
5307 but using the effective IDs instead of the real IDs.
5309 * The time zone data files have been updated for the latest and greatest
5310 local time conventions of the countries of the world.
5312 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5315 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5316 for formatting floating-point numbers. They are provided only for
5317 compatibility; new programs should use `sprintf' instead. There are
5318 also equivalent function for the `long double' floating-point type and
5319 all functions also exist in a reentrant form.
5321 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5322 functions for maintaining the login-record files (primarily of use to
5323 system programs such as `login'), and convenient functions for
5324 allocating and initializing a pseudo-terminal (pty) device.
5326 * Ulrich Drepper has contributed new support for System V style
5327 shared memory and IPC on systems that support it.
5329 * Ulrich Drepper has contributed several miscellaneous new functions found
5330 in System V: The `hsearch' family of functions provide an effective
5331 implementation of hash tables; `a64l' and `l64a' provide a very simple
5332 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5335 * Ulrich Drepper has contributed new reentrant counterparts for the
5336 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5338 * Ulrich Drepper has contributed new, highly-optimized versions of several
5339 string functions for the i486/Pentium family of processors.
5341 * Ulrich Drepper has updated the Linux-specific code, based largely
5342 on work done in Hongjiu Lu's version of GNU libc for Linux.
5343 The GNU library now supports Linux versions 2.0.10 and later,
5344 using the ELF object file format (i[3456]86-*-linux).
5346 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5348 * David Mosberger-Tang and Richard Henderson have ported the C library
5349 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5350 dynamic linking support for ELF/Alpha.
5352 * Richard Henderson contributed several Alpha optimized assembler function
5353 for arithmetic and string handling.
5355 * Ulrich Drepper has contributed a new set of message catalog functions to
5356 support multiple languages using the <libintl.h> interface, for use with
5357 his new package GNU gettext. Translation volunteers have contributed
5358 catalogs of the library's messages in Spanish, German, and Korean.
5360 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5361 program and the `catgets' function for reading the catalog files it
5362 creates. (The <libintl.h> interface is preferred; we include the
5363 <nl_types.h> interface using `catgets' only for source compatibility with
5364 programs already written to use it.)
5366 * New header file <values.h> gives SVID-compatible names for <limits.h>
5369 * Various new macros, declarations, and small header files for compatibility
5372 * New function `group_member' is a convenient way to check if a process has
5373 a given effective group ID.
5375 * When using GCC 2.7 and later, the socket functions are now declared in a
5376 special way so that passing an argument of type `struct sockaddr_in *',
5377 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5378 `struct sockaddr *' type, does not generate a type-clash warning.
5380 * New function `error' declared in header file <error.h> is a convenient
5381 function for printing error messages and optionally exiting; this is the
5382 canonical function used in GNU programs. The new functions `err', `warn',
5383 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5384 doing the same thing.
5386 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5387 POSIX.2 `glob' function to do ~ and {...} expansion.
5389 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5390 `clearenv' which is used in POSIX.9 is also available.
5392 * New function `getsid' returns session ID number on systems that support it.
5394 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5395 files <db.h> and <mpool.h> provide a rich set of functions for several
5396 types of simple databases stored in memory and in files, and <ndbm.h> is
5397 an old `ndbm'-compatible interface using the `db' functions. Link with
5398 `-ldb' to get these functions.
5400 * New macro `strdupa' copies a string like `strdup', but uses local stack
5401 space from `alloca' instead of dynamic heap space from `malloc'.
5403 * New function `strnlen' is like `strlen' but searches only a given maximum
5404 number of characters for the null terminator. `stpncpy', `strndup' and
5405 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5408 * New function `statfs' in header <sys/statfs.h>.
5410 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5411 provide convenient functions for operating on blocks of null-terminated
5414 * A new suite of functions in <utmp.h> handle all the details of reading
5415 and writing the utmp file.
5417 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5420 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5421 completely POSIX compliant and also implemented the extended functionality
5422 to handle alternate digit representation and alternate era date formats.
5424 * Ulrich Drepper provided an implementation of the `strptime' function
5425 defined in XPG4.2 which transforms a string into a `struct tm' value.
5427 * Paul Eggert provided the tzselect shell script as part of the timezone
5428 code. The shell script makes it easy to select the correct timezone
5431 * The implementation of the malloc family of functions is completely replaced
5432 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5433 The implementation uses the mmap function (if available) and it is
5434 optimized for the use in multi threaded programs.
5436 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5437 functions. This new functionality is usable by specifying a special
5438 salt string and it is compatible with implementation on *BSD systems.
5440 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5441 `getsubopt' to handle second level command line options, `bsd_signal'
5442 to access BSD style `signal' functionality, the obsolete `regexp' style
5445 * the `lchown' function is available on system which support this
5448 * The implementation of the shadow password handling function was contributed
5451 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5453 * POSIX.1g support was added. The <sys/select.h> header is available,
5454 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5455 implementation of `getaddrinfo'.
5459 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5461 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5462 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5464 * The new function `daemon' from 4.4 BSD is useful for server programs that
5465 want to put themselves in the background.
5467 * Joel Sherrill has contributed support for several standalone boards that
5468 run without an operating system.
5470 * `printf', `scanf' and friends now accept a `q' type modifier for long
5471 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5473 * All of the code taken from BSD (notably most of the math and networking
5474 routines) has been updated from the BSD 4.4-Lite release.
5476 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5478 * The new functions `getdomainname' and `setdomainname' fetch or change the
5479 YP/NIS domain name. These are system calls which exist on systems which
5482 * The time zone data files have been updated for the latest international
5485 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5486 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5490 * The C library now includes support for Sun RPC, from Sun's free
5491 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5492 are included. (There is still no support for YP.)
5494 * Tom Quinn has contributed a port of the C library to SGI machines running
5495 Irix 4 (mips-sgi-irix4).
5497 * The new `lockf' function is a simplified interface to the locking
5498 facilities of `fcntl', included for compatibility.
5500 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5502 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5504 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5507 * The error message printed by `assert' for a failed assertion now includes
5508 the name of the program (if using GNU ld) and the name of the calling
5509 function (with versions of GCC that support this).
5511 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5513 * The library now includes the <sys/mman.h> header file and memory
5514 management functions `mmap', `munmap', `mprotect', `msync', and
5515 `madvise', on systems that support those facilities.
5517 * The interface for `mcheck' has changed slightly: the function called to
5518 abort the program when an allocation inconsistency is detected now takes
5519 an argument that indicates the type of failure. The new function
5520 `mprobe' lets you request a consistency check for a particular block at
5521 any time (checks are normally done only when you call `free' or `realloc'
5524 * It is now possible to easily cross-compile the C library, building on one
5525 system a library to run on another machine and/or operating system. All
5526 you need to do is set the variable `HOST_CC' in `configparms' to the
5527 native compiler for programs to run on the machine you are building on (a
5528 few generator programs are used on Unix systems); set `CC' to the
5531 * The new function `fexecve' (only implemented on the GNU system) executes
5532 a program file given a file descriptor already open on the file.
5536 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5537 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5539 * You can set the variable `libprefix' in `configparms' to specify a prefix
5540 to be prepended to installed library files; this makes it easy to install
5541 the GNU C library to be linked as `-lgnuc' or whatever.
5543 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5544 copies a limited number of characters from a string, and returns the
5545 address of the last character written.
5547 * You no longer need to check for whether the installed `stddef.h' is
5548 compatible with the GNU C library. configure now checks for you.
5550 * You can now define a per-stream `fileno' function to convert the
5551 stream's cookie into an integral file descriptor.
5553 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5554 allocates zero bytes of storage, and returns a unique pointer which
5555 you can pass to `realloc' or `free'. The behavior is undefined if
5556 you dereference this pointer.
5558 * The C library now runs on Sony NEWS m68k machines running either
5559 NewsOS 3 or NewsOS 4.
5561 * The new `syscall' function is a system-dependent primitive function
5562 for invoking system calls. It has the canonical behavior on Unix
5563 systems, including unreliable return values for some calls (such as
5564 `pipe', `fork' and `getppid').
5566 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5567 to `EAGAIN', which is the preferred name. On systems whose kernels
5568 use two distinct codes, the C library now translates EWOULDBLOCK to
5569 EAGAIN in every system call function.
5573 * The GNU C Library Reference Manual is now distributed with the library.
5574 `make dvi' will produce a DVI file of the printed manual.
5575 `make info' will produce Info files that you can read on line using C-h i
5576 in Emacs or the `info' program.
5577 Please send comments on the manual to bug-glibc-manual@gnu.org.
5579 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5581 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5583 * Jason Merrill has contributed a port to the Sequent Symmetry running
5584 Dynix version 3 (i386-sequent-dynix).
5586 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5587 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5589 * New function `memory_warnings' lets you arrange to get warnings when
5590 malloc is running out of memory to allocate, like Emacs gives you.
5592 * The C library now contains the relocating allocator used in Emacs 19 for
5593 its editing buffers. This allocator (ralloc) minimizes allocation
5594 overhead and fragmentation by moving allocated regions around whenever it
5595 needs to. You always refer to a ralloc'd region with a "handle" (a
5596 pointer to a pointer--an object of type `void **').
5598 * There is a new `printf' format: `%m' gives you the string corresponding
5599 to the error code in `errno'.
5601 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5602 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5603 pass, the `a' modifier says to fill in a `char **' you pass with a
5606 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5607 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5608 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5610 * `mkstemp' is a traditional Unix function to atomically create and open a
5611 uniquely-named temporary file.
5615 * The standard location for the file that says what the local timezone is
5616 has changed again. It is now `/usr/local/etc/localtime' (or more
5617 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5619 * The distribution no longer contains any files with names longer than 14
5622 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5623 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5625 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5629 * The configuration process has changed quite a bit. The `configure'
5630 script is now used just like the configuration scripts for other GNU
5631 packages. The `sysdeps' directory hierarchy is much rearranged.
5632 The file `INSTALL' explains the new scheme in detail.
5634 * The header files no longer need to be processed into ANSI C and
5635 traditional C versions. There is just one set of files to install, and
5636 it will work with ANSI or old C compilers (including `gcc -traditional').
5638 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5639 MIPS DECStation running Ultrix 4.
5641 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5642 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5643 made itself into a shared library.
5645 * Yet further improved support for the i386, running 4.3 BSD-like systems
5646 (such as Mach 3 with the Unix single-server), or System V.
5648 * New function `strncasecmp' to do case-insensitive string comparison
5649 with limited length.
5651 * New function `strsep' is a reentrant alternative to `strtok'.
5653 * New functions `scandir' and `alphasort' for searching directories.
5655 * New function `setenv' is a better interface to `putenv'.
5657 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5658 function for traversing a directory tree.
5660 * The GNU obstack package is now also part of the C library.
5661 The new function `open_obstack_stream' creates a stdio stream that
5662 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5663 formatted output directly to an obstack.
5665 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5666 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5668 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5670 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5671 things to your strings.
5673 * There are some new test programs: test-fseek, testmb, and testrand.
5675 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5676 These ports are not finished, but are a good starting place for really
5677 supporting those systems.
5679 * `/etc/localtime' is now the standard location for the file that says what
5680 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5681 This follows the general principle that `/etc' is the place for all local
5682 configuration files.
5684 * The C library header files now use `extern "C"' when used by the C++
5685 compiler, so the C library should now work with C++ code.
5687 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5688 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5691 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5692 function which uses the `merge sort' algorithm, and is said to be
5693 significantly faster than the old GNU `qsort' function. Merge sort is
5694 now the standard `qsort' function. The new algorithm can require a lot
5695 of temporary storage; so, the old sorting function is called when the
5696 required storage is not available.
5698 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5699 provides the Unix `crypt' function, plus some other entry points.
5701 * The code and header files taken from 4.4 BSD have been updated with the
5702 latest files released from Berkeley.
5704 ----------------------------------------------------------------------
5705 Copyright information:
5707 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5709 Permission is granted to anyone to make or distribute verbatim copies
5710 of this document as received, in any medium, provided that the
5711 copyright notice and this permission notice are preserved,
5712 thus giving the recipient permission to redistribute in turn.
5714 Permission is granted to distribute modified versions
5715 of this document, or of portions of it,
5716 under the above conditions, provided also that they
5717 carry prominent notices stating who last changed them.
5720 version-control: never