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 * Unicode 12.1.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.1.0, using
14 generator scripts contributed by Mike FABIAN (Red Hat).
16 * The dynamic linker accepts the --preload argument to preload shared
17 objects, in addition to the LD_PRELOAD environment variable.
19 * The twalk_r function has been added. It is similar to the existing
20 twalk function, but it passes an additional caller-supplied argument
21 to the callback function.
23 * On Linux, the getdents64, gettid, and tgkill functions have been added.
25 * Minguo (Republic of China) calendar support has been added as an
26 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
29 * The entry for the new Japanese era has been added for ja_JP locale.
31 * Memory allocation functions malloc, calloc, realloc, reallocarray, valloc,
32 pvalloc, memalign, and posix_memalign fail now with total object size
33 larger than PTRDIFF_MAX. This is to avoid potential undefined behavior with
34 pointer subtraction within the allocated object, where results might
35 overflow the ptrdiff_t type.
37 * The dynamic linker no longer refuses to load objects which reference
38 versioned symbols whose implementation has moved to a different soname
39 since the object has been linked. The old error message, symbol
40 FUNCTION-NAME, version SYMBOL-VERSION not defined in file DSO-NAME with
41 link time reference, is gone.
43 * Add new POSIX-proposed pthread_cond_clockwait, pthread_mutex_clocklock,
44 pthread_rwlock_clockrdlock, pthread_rwlock_clockwrlock and sem_clockwait
45 functions. These behave similarly to their "timed" equivalents, but also
46 accept a clockid_t parameter to determine which clock their timeout should
47 be measured against. All functions allow waiting against CLOCK_MONOTONIC
48 and CLOCK_REALTIME. The decision of which clock to be used is made at the
49 time of the wait (unlike with pthread_condattr_setclock, which requires
50 the clock choice at initialization time).
52 * On AArch64 the GNU IFUNC resolver call ABI changed: old resolvers still
53 work, new resolvers can use a second argument which can be extended in
54 the future, currently it contains the AT_HWCAP2 value.
56 Deprecated and removed features, and other changes affecting compatibility:
58 * The copy_file_range function fails with ENOSYS if the kernel does not
59 support the system call of the same name. Previously, user space
60 emulation was performed, but its behavior did not match the kernel
61 behavior, which was deemed too confusing. Applications which use the
62 copy_file_range function can no longer rely on glibc to provide a fallback
63 on kernels that do not support the copy_file_range system call, and if
64 this function returns ENOSYS, they will need to use their own fallback.
65 Support for copy_file_range for most architectures was added in version
66 4.5 of the mainline Linux kernel.
68 * The functions clock_gettime, clock_getres, clock_settime,
69 clock_getcpuclockid, clock_nanosleep were removed from the librt library
70 for new applications (on architectures which had them). Instead, the
71 definitions in libc will be used automatically, which have been available
74 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
75 and <sys/stropts.h> have been removed.
77 * Support for the "inet6" option in /etc/resolv.conf and the RES_USE_INET6
78 resolver flag (deprecated in glibc 2.25) have been removed.
80 * The obsolete RES_INSECURE1 and RES_INSECURE2 option flags for the DNS stub
81 resolver have been removed from <resolv.h>.
83 * With --enable-bind-now, installed programs are now linked with the
86 * Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
87 configurations) has been removed, following the deprecation of this
88 subarchitecture in version 8 of GCC, and its removal in version 9.
90 * On 32-bit Arm, support for the port-based I/O emulation and the <sys/io.h>
91 header have been removed.
93 * The Linux-specific <sys/sysctl.h> header and the sysctl function have been
94 deprecated and will be removed from a future version of glibc.
95 Application should directly access /proc instead. For obtaining random
96 bits, the getentropy function can be used.
98 Changes to build and runtime requirements:
100 * GCC 6.2 or later is required to build the GNU C Library.
102 Older GCC versions and non-GNU compilers are still supported when
103 compiling programs that use the GNU C Library.
105 Security related changes:
107 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
108 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
109 has undefined behavior. On x32, the size_t argument may be passed
110 in the lower 32 bits of the 64-bit RDX register with non-zero upper
111 32 bits. When it happened with the sign bit of RDX register set,
112 memcmp gave the wrong result since it treated the size argument as
113 zero. Reported by H.J. Lu.
115 CVE-2019-9169: Attempted case-insensitive regular-expression match
116 via proceed_next_node in posix/regexec.c leads to heap-based buffer
117 over-read. Reported by Hongxu Chen.
119 The following bugs are resolved with this release:
121 [2872] locale: Transliteration Cyrillic -> ASCII fails
122 [6399] libc: gettid() should have a wrapper
123 [16573] malloc: mtrace hangs when MALLOC_TRACE is defined
124 [16976] glob: fnmatch unbounded stack VLA for collating symbols
125 [17396] localedata: globbing for locale by [[.collating-element.]]
126 [18035] dynamic-link: pldd does no longer work, enters infinite loop
127 [18465] malloc: memusagestat is built using system C library
128 [18830] locale: iconv -c -f ascii with >buffer size worth of input before
129 invalid input drops valid char
130 [20188] nptl: libpthread IFUNC resolver for vfork can lead to crash
131 [20568] locale: Segfault with wide characters and setlocale/fgetwc/UTF-8
132 [21897] localedata: Afar locales: Fix mon, abmon, and abday
133 [22964] localedata: The Japanese Era name will be changed on May 1, 2019
134 [23352] malloc: __malloc_check_init still defined in public header
136 [23403] nptl: Wrong alignment of TLS variables
137 [23501] libc: nftw() doesn't return dangling symlink's inode
138 [23733] malloc: Check the count before calling tcache_get()
139 [23741] malloc: Missing __attribute_alloc_size__ in many allocation
141 [23831] localedata: nl_NL missing LC_NUMERIC thousands_sep
142 [23844] nptl: pthread_rwlock_trywrlock results in hang
143 [23983] argparse: Missing compat versions of argp_failure and argp_error
144 for long double = double
145 [23984] libc: Missing compat versions of err.h and error.h functions for
147 [23996] localedata: Dutch salutations
148 [24040] libc: riscv64: unterminated call chain in __thread_start
149 [24047] network: libresolv should use IP_RECVERR/IPV6_RECVERR to avoid
151 [24051] stdio: puts and putchar ouput to _IO_stdout instead of stdout
152 [24059] nss: nss_files: get_next_alias calls fgets_unlocked without
154 [24114] regex: regexec buffer read overrun in "grep -i
155 '\(\(\)*.\)*\(\)\(\)\1'"
156 [24122] libc: Segfaults if 0 returned from la_version
157 [24153] stdio: Some input functions do not react to stdin assignment
158 [24155] string: x32 memcmp can treat positive length as 0 (if sign bit in
159 RDX is set) (CVE-2019-7309)
160 [24161] nptl: __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
161 [24164] libc: Systemtap probes need to use "nr" constraint on 32-bit Arm,
162 not the default "nor"
163 [24166] dynamic-link: Dl_serinfo.dls_serpath[1] in dlfcn.h causes UBSAN
164 false positives, change to modern flexible array
165 [24180] nptl: pthread_mutex_trylock does not use the correct order of
166 instructions while maintaining the robust mutex list due to missing
168 [24194] librt: Non-compatibility symbols for clock_gettime etc. cause
169 unnecessary librt dependencies
170 [24200] localedata: Revert first_weekday removal in en_IE locale
171 [24211] nptl: Use-after-free in Systemtap probe in pthread_join
172 [24215] nptl: pthread_timedjoin_np should be a cancellation point
173 [24216] malloc: Check for large bin list corruption when inserting
175 [24228] stdio: old x86 applications that use legacy libio crash on exit
176 [24231] dynamic-link: [sparc64] R_SPARC_H34 implementation falls through
178 [24293] localedata: Missing Minguo calendar support for TW locales
179 [24296] localedata: Orthographic mistakes in 'day' and 'abday' sections in
181 [24307] localedata: Update locale data to Unicode 12.0.0
182 [24323] dynamic-link: dlopen should not be able open PIE objects
183 [24335] build: "Obsolete types detected" with Linux 5.0 headers
184 [24369] localedata: Orthographic mistakes in 'mon' and 'abmon' sections in
186 [24370] localedata: Add lang_name for tt_RU locale
187 [24372] locale: Binary locale files are not architecture independent
188 [24394] time: strptime %Ey mis-parses final year of era
189 [24476] dynamic-link: __libc_freeres triggers bad free in libdl if dlerror
191 [24506] dynamic-link: FAIL: elf/tst-pldd with --enable-hardcoded-path-in-
193 [24531] malloc: Malloc tunables give tcache assertion failures
194 [24532] libc: conform/arpa/inet.h failures due to linux kernel 64-bit
196 [24535] localedata: Update locale data to Unicode 12.1.0
197 [24537] build: nptl/tst-eintr1 test case can hit task limits on some
198 kernels and break testing
199 [24544] build: elf/tst-pldd doesn't work if you install with a --prefix
200 [24556] build: [GCC 9] error: ā%sā directive argument is null
201 [-Werror=format-overflow=]
202 [24570] libc: alpha: compat msgctl uses __IPC_64
203 [24584] locale: Data race in __wcsmbs_clone_conv
204 [24588] stdio: Remove codecvt vtables from libio
205 [24603] math: sysdeps/ieee754/dbl-64/branred.c is slow when compiled with
207 [24614] localedata: nl_NL LC_MONETARY doesn't match CLDR 35
208 [24632] stdio: Old binaries which use freopen with default stdio handles
210 [24640] libc: __ppc_get_timebase_freq() always return 0 when using static
212 [24652] localedata: szl_PL spelling correction
213 [24695] nss: nss_db: calling getpwent after endpwent crashes
214 [24696] nss: endgrent() clobbers errno=ERRNO for 'group: db files' entry
215 in /etc/nsswitch.conf
216 [24699] libc: mmap64 with very large offset broken on MIPS64 n32
217 [24740] libc: getdents64 type confusion
218 [24741] dynamic-link: ld.so should not require that a versioned symbol is
219 always implemented in the same library
220 [24744] libc: Remove copy_file_range emulation
221 [24757] malloc: memusagestat is linked against system libpthread
222 [24794] libc: Partial test suite run builds corrupt test-in-container
230 * The getcpu wrapper function has been added, which returns the currently
231 used CPU and NUMA node. This function is Linux-specific.
233 * A new convenience target has been added for distribution maintainers
234 to build and install all locales as directories with files. The new
235 target is run by issuing the following command in your build tree:
236 'make localedata/install-locale-files', with an optional DESTDIR
237 to set the install root if you wish to install into a non-default
240 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
242 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
243 for _GNU_SOURCE, to match BSD environments.
245 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
246 indicates that it will abort the transaction prior to entering the kernel
247 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
248 suspended, and this caused some undefined side-effects issues by aborting
249 transactions manually. Glibc avoided it by abort transactions manually on
250 each syscall, but it lead to performance issues on newer kernels where the
251 HTM state is saved and restore lazily (the state being saved even when the
252 process actually does not use HTM).
254 * The functions posix_spawn_file_actions_addchdir_np and
255 posix_spawn_file_actions_addfchdir_np have been added, enabling
256 posix_spawn and posix_spawnp to run the new process in a different
257 directory. These functions are GNU extensions. The function
258 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
261 * The popen and system do not run atfork handlers anymore (BZ#17490).
262 Although it is a possible POSIX violation, the POSIX rationale in
263 pthread_atfork documentation regarding atfork handlers is to handle
264 inconsistent mutex state after a fork call in a multi-threaded process.
265 In both popen and system there is no direct access to user-defined mutexes.
267 * Support for the C-SKY ABIV2 running on Linux has been added. This port
268 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
270 - C-SKY ABIV2 soft-float little-endian
271 - C-SKY ABIV2 hard-float little-endian
273 * strftime's default formatting of a locale's alternative year (%Ey)
274 has been changed to zero-pad the year to a minimum of two digits,
275 like "%y". This improves the display of Japanese era years during
276 the first nine years of a new era, and is expected to be harmless
277 for all other locales (only Japanese locales regularly have
278 alternative year numbers less than 10). Zero-padding can be
279 overridden with the '_' or '-' flags (which are GNU extensions).
281 * As a GNU extension, the '_' and '-' flags can now be applied to
282 "%EY" to control how the year number is formatted; they have the
283 same effect that they would on "%Ey".
285 Deprecated and removed features, and other changes affecting compatibility:
287 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
288 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
290 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
291 in <sys/procfs.h>, has been corrected to match the type actually used by
292 the Linux kernel. This affects the size and layout of that structure on
293 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
295 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
296 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
297 defined in <sys/procfs.h>, has been corrected to match the type actually
298 used by the Linux kernel. This affects the size and layout of those
301 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
302 meant to scan a string and allocate space for it with malloc, is now
303 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
304 defined. This extension conflicts with C99's use of '%a' to scan a
305 hexadecimal floating-point number, which is now available to programs
306 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
308 POSIX.1-2008 includes the feature of allocating a buffer for string input
309 with malloc, using the modifier letter 'm' instead. Programs using
310 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
311 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
312 C99 '%a' no longer need to avoid _GNU_SOURCE.
314 GCC's -Wformat warnings can detect most uses of this extension, as long
315 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
316 __attribute__ ((format (scanf, ...))).
318 Changes to build and runtime requirements:
320 * Python 3.4 or later is required to build the GNU C Library.
322 * On most architectures, GCC 5 or later is required to build the GNU C
323 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
325 Older GCC versions and non-GNU compilers are still supported when
326 compiling programs that use the GNU C Library.
328 Security related changes:
330 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
331 denial of service due to resource exhaustion when processing getaddrinfo
332 calls with crafted host names. Reported by Guido Vranken.
334 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
335 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
336 happened, accessing the 32-bit size_t value as the full 64-bit register
337 in the assembly string/memory functions would cause a buffer overflow.
340 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
341 addresses with arbitrary trailing characters, potentially leading to data
342 or command injection issues in applications.
344 The following bugs are resolved with this release:
346 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
347 [10496] localedata: 12h time representation in multiple locales faulty
348 [10797] localedata: it_IT locale numeric does not have a separator for
350 [11319] libc: dprintf doesn't handle errors properly
351 [16346] time: mktime: potentially unsafe use of localtime_offset
352 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
354 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
355 posix_spawn_file_actions_addfchdir_np
356 [17426] localedata: Indian locales: set the correct date format
357 [17490] stdio: popen should not invoke atfork handlers
358 [17783] libc: TIOCSER_TEMT conditions inconsistent
359 [18040] regex: use-after-free in regexec/get_subexp
360 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
361 [20018] network: getaddrinfo should reject IP addresses with trailing
362 characters (CVE-2016-10739)
363 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
364 [20271] libc: Missing "\n" in __libc_fatal calls
365 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
366 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
367 pointer argument is non-NULL
368 [21037] stdio: open_memstream and freopen
369 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
370 [21716] time: Crash in glibc's mktime in low-memory situations
371 [22834] stdio: Subprocess forked by popen may crash in Linux when
372 multithreads call popen
373 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
374 and pthread_create fails.
375 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
376 [23125] libc: riscv64: endless loop when throwing an exception from a
378 [23275] nptl: Race in pthread_mutex_lock while promoting to
379 PTHREAD_MUTEX_ELISION_NP.
380 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
382 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
384 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
386 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
387 [23509] dynamic-link: CET enabled glibc is incompatible with the older
389 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
390 [23521] nss: get_next_alias nss_files file stream leak
391 [23538] nptl: Hang in pthread_cond_broadcast
392 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
393 [23578] regex: Invalid memory access if regex pattern contains NUL byte
394 [23579] libc: Errors misreported in preadv2
395 [23597] build: support/test-container.c doesn't work with different
397 [23603] time: mktime signed integer overflow on large timestamps
398 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
399 [23614] libc: powerpc: missing CFI register information in __mpn_*
401 [23637] string: Generic strstr/strcasestr fails with huge needles
402 [23640] libc: no way to easily clear FD_CLOEXEC in
403 posix_spawn_file_actions_adddup2()
404 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
406 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
408 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
409 [23689] libc: Bug in documentation for rusage.ru_ixrss in
410 bits/types/struct_rusage.h
411 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
413 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
415 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
416 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
417 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
419 [23724] localedata: Albanian date formats are incorrect
420 [23735] math: libnldbl_nonshared.a references internal libm symbols
421 [23740] localedata: kl_GL: Month names and date formats need update
422 [23744] regex: regex refactorings to remove BE, avoid duplication
423 [23745] time: mktime fix for Gnulib + coreutils
424 [23758] time: Improve the width of alternate representation for year in
426 [23783] libc: [mips] Missing CMSPAR bits/termios.h
427 [23789] time: mktime does not set errno on failure
428 [23791] localedata: Wrong monetary format for ca_ES locale
429 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
430 [23794] locale: c16rtomb does not handle surrogate pairs
431 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
432 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
433 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
434 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
435 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
436 [23862] libc: [sh] missing kernel-features.h undefines
437 [23864] libc: [riscv] missing kernel-features.h undefines
438 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
439 [23907] malloc: Incorrect double-free malloc tcache check disregards
441 [23913] libc: off-by-one in function maybe_script_execute in
442 sysdeps/posix/spawni.c
443 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
444 [23923] locale: Add --no-hard-links option to localedef
445 [23927] network: Linux if_nametoindex() does not close descriptor
447 [23961] math: powf can overflow to inf without setting errno in non-
448 nearest rounding mode
449 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
450 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
451 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
452 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
453 [24011] localedata: Fixed small type in comment for locale bs_BA
454 [24018] libc: gettext() may return NULL
455 [24022] build: riscv build failure with Linux kernel 4.20-rc7
456 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
457 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
459 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
460 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
462 [24046] localedata: en_US locale doesn't define date_fmt
463 [24063] manual: @var{errno} should be @code{errno}
464 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
465 [24088] libc: VSCR field is not being correctly read in ucontext_t on
467 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
469 [24097] string: Can't use 64-bit register for size_t in assembly codes for
471 [24110] hurd: SS_DISABLE never set in stack_t value returned by
473 [24112] network: Do not send DNS queries for non-host names (where all
474 answers will be rejected)
475 [24130] libc: alpha __remqu corrupts $f3 register
482 * The localization data for ISO 14651 is updated to match the 2016
483 Edition 4 release of the standard, this matches data provided by
484 Unicode 9.0.0. This update introduces significant improvements to the
485 collation of Unicode characters. This release deviates slightly from
486 the standard in that the collation element ordering for lowercase and
487 uppercase LATIN script characters is adjusted to ensure that regular
488 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
489 is not matched by [a-z]. With the update many locales have been
490 updated to take advantage of the new collation information. The new
491 collation information has increased the size of the compiled locale
492 archive or binary locales.
494 * The GNU C Library can now be compiled with support for Intel CET, AKA
495 Intel Control-flow Enforcement Technology. When the library is built
496 with --enable-cet, the resulting glibc is protected with indirect
497 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
498 compatible with all existing executables and shared libraries. This
499 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
500 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
501 capable of multi-byte NOPs, like x86-64 processors as well as Intel
502 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
503 x86_64 and x32 on non-CET processors. --enable-cet has been tested
504 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
507 * The GNU C Library now has correct support for ABSOLUTE symbols
508 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
509 relocated incorrectly or in some cases discarded. The GNU linker can
510 make use of the newer semantics, but it must communicate it to the
511 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
512 field) to indicate such support is required.
514 * Unicode 11.0.0 Support: Character encoding, character type info, and
515 transliteration tables are all updated to Unicode 11.0.0, using
516 generator scripts contributed by Mike FABIAN (Red Hat).
518 * <math.h> functions that round their results to a narrower type are added
519 from TS 18661-1:2014 and TS 18661-3:2015:
521 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
524 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
527 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
530 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
533 * Two grammatical forms of month names are now supported for the following
534 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
535 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
536 support two grammatical forms in abbreviated month names: Catalan, Greek,
539 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
540 include the support for two grammatical forms of month names.
542 * Building and running on GNU/Hurd systems now works without out-of-tree
545 * The renameat2 function has been added, a variant of the renameat function
546 which has a flags argument. If the flags are zero, the renameat2 function
547 acts like renameat. If the flag is not zero and there is no kernel
548 support for renameat2, the function will fail with an errno value of
549 EINVAL. This is different from the existing gnulib function renameatu,
550 which performs a plain rename operation in case of a RENAME_NOREPLACE
551 flags and a non-existing destination (and therefore has a race condition
552 that can clobber the destination inadvertently).
554 * The statx function has been added, a variant of the fstatat64
555 function with an additional flags argument. If there is no direct
556 kernel support for statx, glibc provides basic stat support based on
557 the fstatat64 function.
559 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
560 library if installed. libidn2 version 2.0.5 or later is recommended. If
561 libidn2 is not available, internationalized domain names are not encoded
562 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
563 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
564 with an encoding error.) Flags which used to change the IDN encoding and
565 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
566 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
567 deprecated. They no longer have any effect.
569 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
570 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
571 range of ELF gABI expressions including such constructs as
572 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
573 have been further restricted, and where in the past a dynamic string
574 token sequence may have been interpreted as a literal string it will
575 now cause a load failure. These load failures were always considered
576 unspecified behaviour from the perspective of the dynamic loader, and
577 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
578 results in a load failure now.
580 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
581 implementation includes all the standard functions provided by
584 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
585 thrd_detach, thrd_exit, and thrd_join for thread management.
587 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
588 mtx_destroy for mutual exclusion.
590 - call_once for function call synchronization.
592 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
593 cnd_wait for conditional variables.
595 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
597 Application developers must link against libpthread to use ISO C threads.
599 Deprecated and removed features, and other changes affecting compatibility:
601 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
602 installed. Software that was using either header should be updated to
603 use standard <stdio.h> interfaces instead.
605 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
606 This was never required by the C standard, and the macros just expanded
607 to call alternative names for the same functions. If you hoped getc and
608 putc would provide performance improvements over fgetc and fputc, instead
609 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
610 necessary, flockfile and funlockfile.
612 * All stdio functions now treat end-of-file as a sticky condition. If you
613 read from a file until EOF, and then the file is enlarged by another
614 process, you must call clearerr or another function with the same effect
615 (e.g. fseek, rewind) before you can read the additional data. This
616 corrects a longstanding C99 conformance bug. It is most likely to affect
617 programs that use stdio to read interactive input from a terminal.
620 * The macros 'major', 'minor', and 'makedev' are now only available from
621 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
622 headers that happen to include <sys/types.h>. These macros are rarely
623 used, not part of POSIX nor XSI, and their names frequently collide with
624 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
627 <sys/sysmacros.h> is a GNU extension. Portable programs that require
628 these macros should first include <sys/types.h>, and then include
629 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
631 * The tilegx*-*-linux-gnu configurations are no longer supported.
633 * The obsolete function ustat is no longer available to newly linked
634 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
635 function has been deprecated in favor of fstatfs and statfs.
637 * The obsolete function nfsservctl is no longer available to newly linked
638 binaries. This function was specific to systems using the Linux kernel
639 and could not usefully be used with the GNU C Library on systems with
640 version 3.1 or later of the Linux kernel.
642 * The obsolete function name llseek is no longer available to newly linked
643 binaries. This function was specific to systems using the Linux kernel
644 and was not declared in a header. Programs should use the lseek64 name
645 for this function instead.
647 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
648 getaddrinfo and getnameinfo functions have been deprecated. The behavior
649 previously selected by them is now always enabled.
651 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
652 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
653 restriction (rejecting '_' in host names, among other things) has been
654 removed, for increased compatibility with non-IDN name resolution.
656 * The fcntl function now have a Long File Support variant named fcntl64. It
657 is added to fix some Linux Open File Description (OFD) locks usage on non
658 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
659 fcntl and LFS support is handled transparently. Also for Linux, the OFD
660 locks act as a cancellation entrypoint.
662 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
663 ecb_crypt, and des_setparity are no longer available to newly linked
664 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
665 longer installed. These functions encrypted and decrypted data with the
666 DES block cipher, which is no longer considered secure. Software that
667 still uses these functions should switch to a modern cryptography library,
670 * Reflecting the removal of the encrypt and setkey functions above, the
671 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
672 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
675 * The obsolete function fcrypt is no longer available to newly linked
676 binaries. It was just another name for the standard function crypt,
677 and it has not appeared in any header file in many years.
679 * We have tentative plans to hand off maintenance of the passphrase-hashing
680 library, libcrypt, to a separate development project that will, we hope,
681 keep up better with new passphrase-hashing algorithms. We will continue
682 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
683 'crypt_r' should not need to change at all; however, distributions will
684 need to install <crypt.h> and libcrypt from a separate project.
686 In this release, if the configure option --disable-crypt is used, glibc
687 will not install <crypt.h> or libcrypt, making room for the separate
688 project's versions of these files. The plan is to make this the default
689 behavior in a future release.
691 Changes to build and runtime requirements:
693 GNU make 4.0 or later is now required to build glibc.
695 Security related changes:
697 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
698 been fixed by removing the glibc-internal IDNA implementation and using
699 the system-provided libidn2 library instead. Originally reported by Hanno
700 Bƶck and Christian Weisgerber.
702 CVE-2017-18269: An SSE2-based memmove implementation for the i386
703 architecture could corrupt memory. Reported by Max Horn.
705 CVE-2018-11236: Very long pathname arguments to realpath function could
706 result in an integer overflow and buffer overflow. Reported by Alexey
709 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
710 architecture could write beyond the target buffer, resulting in a buffer
711 overflow. Reported by Andreas Schwab.
713 The following bugs are resolved with this release:
715 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
716 [6889] manual: 'PWD' mentioned but not specified
717 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
718 when __WORDSIZE != 64
719 [13762] regex: re_search etc. should return -2 on memory exhaustion
720 [13888] build: /tmp usage during testing
721 [13932] math: dbl-64 pow unexpectedly slow for some inputs
722 [14092] nptl: Support C11 threads
723 [14095] localedata: Review / update collation data from Unicode / ISO
725 [14508] libc: -Wformat warnings
726 [14553] libc: Namespace pollution loff_t in sys/types.h
727 [14890] libc: Make NT_PRFPREG canonical.
728 [15105] libc: Extra PLT references with -Os
729 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
731 [16335] manual: Feature test macro documentation incomplete and out of
733 [16552] libc: Unify umount implementations in terms of umount2
734 [17082] libc: htons et al.: statement-expressions prevent use on global
735 scope with -O1 and higher
736 [17343] libc: Signed integer overflow in /stdlib/random_r.c
737 [17438] localedata: pt_BR: wrong d_fmt delimiter
738 [17662] libc: please implement binding for the new renameat2 syscall
739 [17721] libc: __restrict defined as /* Ignore */ even in c11
740 [17979] libc: inconsistency between uchar.h and stdint.h
741 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
742 [18023] libc: extend_alloca is broken (questionable pointer comparison,
743 horrible machine code)
744 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
746 [18471] libc: llseek should be a compat symbol
747 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
749 [18991] nss: nss_files skips large entry in database
750 [19239] libc: Including stdlib.h ends up with macros major and minor being
752 [19463] libc: linknamespace failures when compiled with -Os
753 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
754 [19527] locale: Normalized charset name not recognized by setlocale
755 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
756 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
758 [19728] network: out of bounds stack read in libidn function
759 idna_to_ascii_4i (CVE-2016-6261)
760 [19729] network: out of bounds heap read on invalid utf-8 inputs in
761 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
762 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
764 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
765 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
766 [20419] dynamic-link: files with large allocated notes crash in
768 [20530] libc: bswap_16 should use __builtin_bswap16() when available
769 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
770 [20980] manual: CFLAGS environment variable replaces vital options
771 [21163] regex: Assertion failure in pop_fail_stack when executing a
772 malformed regexp (CVE-2015-8985)
773 [21234] manual: use of CFLAGS makes glibc detect no optimization
774 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
775 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
776 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
777 [21508] locale: intl/tst-gettext failure with latest msgfmt
778 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
779 [21812] network: getifaddrs() returns entries with ifa_name == NULL
780 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
782 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
784 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
785 [22247] network: Integer overflow in the decode_digit function in
786 puny_decode.c in libidn (CVE-2017-14062)
787 [22342] nscd: NSCD not properly caching netgroup
788 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
789 [22550] localedata: es_ES locale (and other es_* locales): collation
790 should treat Ʊ as a primary different character, sync the collation
791 for Spanish with CLDR
792 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
793 by gcc configured with --enable-default-pie
794 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
795 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
796 crossing 2GB threshold (CVE-2017-18269)
797 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
799 [22735] time: Misleading typo in time.h source comment regarding
801 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
802 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
803 `__assert_perror_fail ()' to `__assert_fail_base ()'
804 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
806 [22786] libc: Stack buffer overflow in realpath() if input size is close
807 to SSIZE_MAX (CVE-2018-11236)
808 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
809 through an absolute DT_NEEDED path
810 [22792] build: tcb-offsets.h dependency dropped
811 [22797] libc: pkey_get() uses non-reserved name of argument
812 [22807] libc: PTRACE_* constants missing for powerpc
813 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
814 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
815 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
816 [22848] localedata: ca_ES: update date definitions from CLDR
817 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
818 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
819 [22896] localedata: Update locale data for an_ES
820 [22902] math: float128 test failures with GCC 8
821 [22918] libc: multiple common of `__nss_shadow_database'
822 [22919] libc: sparc32: backtrace yields infinite backtrace with
824 [22926] libc: FTBFS on powerpcspe
825 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
827 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
828 [22947] libc: FAIL: misc/tst-preadvwritev2
829 [22963] localedata: cs_CZ: Add alternative month names
830 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
831 [22996] localedata: change LC_PAPER to en_US in es_BO locale
832 [22998] dynamic-link: execstack tests are disabled when SELinux is
834 [23005] network: Crash in __res_context_send after memory allocation
836 [23007] math: strtod cannot handle -nan
837 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
838 [23036] regex: regex equivalence class regression
839 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
840 [23069] libc: sigaction broken on riscv64-linux-gnu
841 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
842 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
843 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
844 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
845 and libc build with -Os)
846 [23140] localedata: More languages need two forms of month names
847 [23145] libc: _init/_fini aren't marked as hidden
848 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
849 [23171] math: C++ iseqsig for long double converts arguments to double
850 [23178] nscd: sudo will fail when it is run in concurrent with commands
851 that changes /etc/passwd
852 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
854 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
855 [23208] localedata: New locale - Lower Sorbian (dsb)
856 [23233] regex: Memory leak in build_charclass_op function in file
858 [23236] stdio: Harden function pointers in _IO_str_fields
859 [23250] nptl: Offset of __private_ss differs from GCC
860 [23253] math: tgamma test suite failures on i686 with -march=x86-64
861 -mtune=generic -mfpmath=sse
862 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
864 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
865 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
867 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
868 [23277] math: nan function should not have const attribute
869 [23279] math: scanf and strtod wrong for some hex floating-point
870 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
872 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
873 [23303] build: undefined reference to symbol
874 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
875 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
877 [23313] stdio: libio vtables validation and standard file object
879 [23329] libc: The __libc_freeres infrastructure is not properly run across
881 [23349] libc: Various glibc headers no longer compatible with
883 [23351] malloc: Remove unused code related to heap dumps and malloc
885 [23363] stdio: stdio-common/tst-printf.c has non-free license
886 [23396] regex: Regex equivalence regression in single-byte locales
887 [23422] localedata: oc_FR: More updates of locale data
888 [23442] build: New warning with GCC 8
889 [23448] libc: Out of bounds access in IBM-1390 converter
890 [23456] libc: Wrong index_cpu_LZCNT
891 [23458] build: tst-get-cpu-features-static isn't added to tests
892 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
894 [23467] dynamic-link: x86/CET: A property note parser bug
901 * The GNU C Library can now be compiled with support for building static
902 PIE executables (See --enable-static-pie in INSTALL). These static PIE
903 executables are like static executables but can be loaded at any address
904 and provide additional security hardening benefits at the cost of some
905 memory and performance. When the library is built with --enable-static-pie
906 the resulting libc.a is usable with GCC 8 and above to create static PIE
907 executables using the GCC option '-static-pie'. This feature is currently
908 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
909 aarch64 with binutils 2.30 or later.
911 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
912 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
915 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
917 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
919 * In order to support faster and safer process termination the malloc API
920 family of functions will no longer print a failure address and stack
921 backtrace after detecting heap corruption. The goal is to minimize the
922 amount of work done after corruption is detected and to avoid potential
923 security issues in continued process execution. Reducing shutdown time
924 leads to lower overall process restart latency, so there is benefit both
925 from a security and performance perspective.
927 * The abort function terminates the process immediately, without flushing
928 stdio streams. Previous glibc versions used to flush streams, resulting
929 in deadlocks and further data corruption. This change also affects
930 process aborts as the result of assertion failures.
932 * On platforms where long double has the IEEE binary128 format (aarch64,
933 alpha, mips64, riscv, s390 and sparc), the math library now implements
934 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
935 These are the same interfaces added in version 2.26 for some platforms where
936 this format is supported but is not the format of long double.
938 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
939 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
940 implements interfaces for that type, as defined by ISO/IEC TS
941 18661-3:2015. These are corresponding interfaces to those supported for
944 * The math library now implements interfaces for the _Float32, _Float64 and
945 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
946 corresponding interfaces to those supported for _Float128.
948 * glibc now implements the memfd_create and mlock2 functions on Linux.
950 * Support for memory protection keys was added. The <sys/mman.h> header now
951 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
954 * The copy_file_range function was added.
956 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
958 * The ldconfig utility now processes `include' directives using the C/POSIX
959 collation ordering. Previous glibc versions used locale-specific
960 ordering, the change might break systems that relied on that.
962 * Support for two grammatical forms of month names has been added.
963 In a call to strftime, the "%B" and "%b" format specifiers will now
964 produce the grammatical form required when the month is used as part
965 of a complete date. New "%OB" and "%Ob" specifiers produce the form
966 required when the month is named by itself. For instance, in Greek
967 and in many Slavic and Baltic languages, "%B" will produce the month
968 in genitive case, and "%OB" will produce the month in nominative case.
970 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
971 are all valid and will all accept any known form of month
972 name---standalone or complete, abbreviated or full. In a call to
973 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
974 the strings used by "%B" and "%b", respectively. New query
975 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
976 used by "%OB" and "%Ob", respectively.
978 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
979 define the strings for %OB and %Ob, respectively; these have the
980 same syntax as "mon" and "abmon". These arrays are optional; if they
981 are not provided then they have the same content as "mon" and "abmon",
984 These features are provided for locales which define "alt_mon" and/or
985 "ab_alt_mon" in their locale source data. This release includes such
986 alternative month name data for the following languages: Belarusian,
987 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
989 This feature is currently a GNU extension, but it is expected to
990 be added to the next revision of POSIX, and it is also already
991 available on some BSD-derived operating systems.
993 This feature will cause existing statically compiled applications
994 to fail to load locales and fall back to the builtin C/POSIX locales.
995 See notes below for other changes affecting compatibility.
997 * Support for the RISC-V ISA running on Linux has been added. This port
998 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
999 for the following ISA and ABI pairs:
1005 Deprecated and removed features, and other changes affecting compatibility:
1007 * Statically compiled applications attempting to load locales compiled for the
1008 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
1009 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
1010 support for two grammatical forms of the month names, also extends the locale
1011 data binary format. Static applications needing locale support must be
1012 recompiled to match the runtime and data they are deployed with. In some
1013 distributions there is an upgrade window where dynamically linked applications
1014 may use a new library but the old locale data and also fall back to the
1015 builtin C/POSIX locales; restarting the application process is sufficient to
1018 * Support for statically linked applications which call dlopen is deprecated
1019 and will be removed in a future version of glibc. Applications which call
1020 dlopen need to be linked dynamically instead.
1022 * Support for old programs which use internal stdio data structures and
1023 functions is deprecated. This includes programs which use the C++ streams
1024 provided by libstdc++ in GCC 2.95. Programs which use the internal
1025 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
1026 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
1027 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
1028 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
1029 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
1030 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
1031 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
1032 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
1033 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
1034 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
1035 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
1036 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
1037 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
1038 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
1039 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
1040 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
1041 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
1042 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
1043 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
1044 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
1045 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
1046 future version of glibc. Unlike other symbol removals, these old
1047 applications will not be supported using compatibility symbols.
1049 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
1050 defined by <sys/ptrace.h>.
1052 * libm no longer supports SVID error handling (calling a user-provided
1053 matherr function on error) or the _LIB_VERSION variable to control error
1054 handling. (SVID error handling and the _LIB_VERSION variable still work
1055 for binaries linked against older versions of the GNU C Library.) The
1056 libieee.a library is no longer provided. math.h no longer defines struct
1057 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
1058 TLOSS, PLOSS and HUGE.
1060 * The libm functions pow10, pow10f and pow10l are no longer supported for
1061 new programs. Programs should use the standard names exp10, exp10f and
1062 exp10l for these functions instead.
1064 * The mcontext_t type is no longer the same as struct sigcontext. On
1065 platforms where it was previously the same, this changes the C++ name
1066 mangling for interfaces involving this type.
1068 * The add-ons mechanism for building additional packages at the same time as
1069 glibc has been removed. The --enable-add-ons configure option is now
1072 * The --without-fp configure option is now ignored. Whether hardware
1073 floating-point instructions are used is now configured based on whether
1074 the compiler used at configure time (without any options implied by a
1075 --with-cpu= configure option) uses such instructions.
1077 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
1078 the specified string can be parsed as a domain name.
1080 * In the malloc_info output, the <heap> element may contain another <aspace>
1081 element, "subheaps", which contains the number of sub-heaps.
1083 * The libresolv function p_secstodate is no longer supported for new
1086 * The tilepro-*-linux-gnu configuration is no longer supported.
1088 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
1089 and will be removed in a future release. Software that is still using
1090 either header should be updated to use standard <stdio.h> interfaces
1093 libio.h was originally the header for a set of supported GNU extensions,
1094 but they have not been maintained as such in many years, they are now
1095 standing in the way of improvements to stdio, and we don't think there are
1096 any remaining external users. _G_config.h was never intended for public
1097 use, but predates the bits convention.
1099 Changes to build and runtime requirements:
1101 * bison version 2.7 or later is required to generate code in the 'intl'
1104 Security related changes:
1106 CVE-2009-5064: The ldd script would sometimes run the program under
1107 examination directly, without preventing code execution through the
1108 dynamic linker. (The glibc project disputes that this is a security
1109 vulnerability; only trusted binaries must be examined using the ldd
1112 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1113 suffered from a one-byte overflow during ~ operator processing (either
1114 on the stack or the heap, depending on the length of the user name).
1115 Reported by Tim RĆ¼hsen.
1117 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1118 would sometimes fail to free memory allocated during ~ operator
1119 processing, leading to a memory leak and, potentially, to a denial
1122 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1123 without GLOB_NOESCAPE, could write past the end of a buffer while
1124 unescaping user names. Reported by Tim RĆ¼hsen.
1126 CVE-2017-17426: The malloc function, when called with an object size near
1127 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1128 instead of NULL. This was a regression introduced with the new malloc
1129 thread cache in glibc 2.26. Reported by Iain Buclaw.
1131 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1132 to the allocation of too much memory. (This is not a security bug per se,
1133 it is mentioned here only because of the CVE assignment.) Reported by
1136 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1137 of the number of search path components. (This is not a security
1138 vulnerability per se because no trust boundary is crossed if the fix for
1139 CVE-2017-1000366 has been applied, but it is mentioned here only because
1140 of the CVE assignment.) Reported by Qualys.
1142 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1143 for AT_SECURE or SUID binaries could be used to load libraries from the
1146 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1147 succeeds without returning an absolute path due to unexpected behaviour
1148 of the Linux kernel getcwd syscall. Reported by halfdog.
1150 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1151 an object size near the value of SIZE_MAX, would return a pointer to a
1152 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1154 CVE-2018-6551: The malloc function, when called with an object size near
1155 the value of SIZE_MAX, would return a pointer to a buffer which is too
1156 small, instead of NULL.
1158 The following bugs are resolved with this release:
1160 [866] glob: glob should match dangling symlinks
1161 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1162 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1164 [5997] math: Very slow execution of sinf function
1165 [10580] localedata: hr_HR: updated locale
1166 [10871] locale: 'mon' array should contain both nominative and genitive
1168 [12349] localedata: eu_ES: incorrect thousands separator
1169 [13605] localedata: shn_MM: new Shan locale
1170 [13805] localedata: ru_RU: currency should use ',' as radix point
1171 [13953] localedata: km_KH: locale update
1172 [13994] localedata: mjw_IN: new locale
1173 [14121] build: make writes .mo files in po directory
1174 [14333] libc: Fix the race between atexit() and exit()
1175 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1176 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1178 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1179 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1180 width Latin characters
1181 [15332] localedata: es_CU: locale update
1182 [15436] stdio: Don't close or flush stdio streams on abort
1183 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1185 [16148] localedata: ca_ES: incorrect thousands separator
1186 [16750] dynamic-link: ldd should not try to execute the binaries
1188 [16777] localedata: pl_PL: incorrect thousands separator in locale
1189 [16905] localedata: hanzi: new collation
1190 [17563] localedata: cmn_TW: add hanzi collation
1191 [17750] localedata: wrong collation order of diacritics in most locales
1192 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1194 [17956] build: Build fails on missing definitions from header file
1195 nss/nss.h when Mozilla NSS is used for cryptography
1196 [18203] libc: realpath() does not handle unreachable paths correctly
1197 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1198 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1199 [18822] libc: Internal functions are called via PLT
1200 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1201 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1202 [19574] libc: glibc should support building static PIE binaries
1203 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1205 [19971] glob: glob: Do not skip entries with zero d_ino values
1206 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1207 [20008] localedata: km_KH: convert to translit_neutral
1208 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1209 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1210 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1211 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1212 [20498] localedata: miq_NI: new MĆskitu / Miskito (miq) language locale
1214 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1215 they're set, wrong errors returned by gaih_inet when lookup functions
1217 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1218 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1220 [20952] localedata: yuw_PG: new locale
1221 [21084] localedata: charmaps/IBM858: new codepage
1222 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1223 [21242] libc: assert gives pedantic warning in old gcc versions
1224 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1225 __regcall calling convention
1226 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1227 [21326] libc: C99 functions are not declared for C++11 and later if
1228 _GNU_SOURCE is not predefined by g++
1229 [21457] libc: sys/ucontext.h namespace
1230 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1231 [21660] math: GCC fails to compile a formula with tgmath.h
1232 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1233 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1234 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1235 [21684] math: tgmath.h handling of complex integers
1236 [21685] math: tgmath.h handling of bit-fields
1237 [21686] math: tgmath.h handling of __int128
1238 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1240 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1242 [21750] localedata: column width of characters incompatible with classical
1244 [21754] malloc: malloc: Perform as little work as possible after heap
1245 consistency check failures
1246 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1247 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1248 [21791] string: Unused XXX_chk_XXX functions in libc.a
1249 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1251 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1253 [21845] localedata: Added new Locale bho_NP
1254 [21853] localedata: Fix abday Which looks same as day in zh_SG
1255 [21854] localedata: Added New Locale en_SC
1256 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1257 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1258 _dl_runtime_resolve_avx_slow
1259 [21885] network: getaddrinfo: gethosts does not release resolver context
1260 on memory allocation failure
1261 [21899] libc: XPG4.2 sigaction namespace
1262 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1264 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1266 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1267 errno value, causing getaddrinfo to fail
1268 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1269 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1270 instead of EAI_NODATA
1271 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1272 constant PTRACE_SEIZE_DEVEL
1273 [21930] math: C-only gcc builtins used in <math.h> isinf
1274 [21932] network: Unpaired __resolv_context_get in generic get*_r
1276 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1277 [21944] libc: sigval namespace
1278 [21951] localedata: Update hanzi collation by stroke
1279 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1280 sysdeps/x86_64/fpu/e_expf.S
1281 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1282 allocation in syscall loops)
1283 [21959] localedata: Fix Country name for xh_ZA
1284 [21960] localedata: Fix abmon for bem_ZM
1285 [21966] math: AVX2 mathvec functions use FMA without checking
1286 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1287 [21971] localedata: Added New Locale for mfe_MU
1288 [21972] libc: assert macro requires operator== (int) for its argument type
1289 [21973] math: [sparc] libm missing sqrtl compat symbol
1290 [21974] libc: Remove __bb_init_func and __bb_exit_func
1291 [21982] string: stratcliff.c: error: assuming signed overflow does not
1293 [21986] stdio: __guess_grouping is called incorrectly
1294 [21987] math: [sparc32] wrong bits/long-double.h installed
1295 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1297 [22022] localedata: Missing country_name for mni_IN
1298 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1300 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1302 [22026] locale: iconv_open: heap overflow on gconv_init failure
1303 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1304 [22035] math: [m68k] bits/math-inline.h macro namespace
1305 [22038] localedata: Fix abbreviated weeks and months for Somali
1306 [22044] localedata: Remove redundant data for Limburgish Language
1307 [22050] malloc: Linking with -lmcheck does not hook
1308 __malloc_initialize_hook correctly
1309 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1310 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1311 [22070] localedata: charmaps/UTF-8: wcwidth for
1312 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1313 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1314 Jungseong and Jongseong) should be 0
1315 [22078] nss: nss_files performance issue in multi mode
1316 [22082] math: bits/math-finite.h exp10 condition
1317 [22086] libc: pcprofiledump incorrect cross-endian condition
1318 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1319 [22095] network: Name server address allocation memory leak in resolv.conf
1321 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1323 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1324 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1326 [22111] malloc: malloc: per thread cache is not returned when thread exits
1327 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1328 [22134] libc: [linux] implement fexecve with execveat
1329 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1331 [22145] libc: ttyname() gives up too early in the face of namespaces
1332 [22146] math: C++ build issue with float128 on x86_64
1333 [22153] nptl: nptl: save error code before process termination
1334 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1335 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1336 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1337 [22165] libc: [hppa] Text relocations in libc.so
1338 [22180] libc: destructor registered via __cxa_atexit is called twice
1339 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1340 symlinks") cause "make" segfaults
1341 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1343 [22207] libc: FAIL: stdlib/test-atexit-race
1344 [22225] math: nearbyint arithmetic moved before feholdexcept
1345 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1346 [22235] math: iscanonical in C++ and float128
1347 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1348 the svid compat wrapper
1349 [22244] math: ynf and yn are wrong without the svid compat wrapper
1350 [22273] libc: Improper assert in Linux posix_spawn implementation
1351 [22284] libc: -pg -pie doesn't work
1352 [22292] locale: localedef exits with error 4 when it should be error 1
1353 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1354 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1356 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1357 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1359 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1360 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1361 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1362 [22322] libc: [mips64] wrong bits/long-double.h installed
1363 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1364 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1366 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1367 [22343] malloc: Integer overflow in posix_memalign
1368 [22347] libc: getrandom() returns the number of bytes that were copied to
1369 the buffer even though the comments say "Return 0 on success and -1 on
1371 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1372 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1374 [22370] dynamic-link: Incorrect note padding check
1375 [22375] libc: malloc returns pointer from tcache_get when should return
1376 NULL (CVE-2017-17426)
1377 [22377] math: iseqsig, float128 and C++
1378 [22382] localedata: Error in tpi_PG locale
1379 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1380 inside the ASCII printable range
1381 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1383 [22403] localedata: Slash needs escaping in some locales
1384 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1385 [22409] network: res_hnok does not accept some host names used on the
1387 [22412] network: res_dnok, res_hnok should perform syntax checks
1388 [22413] network: ns_name_pton ignores syntactically invalid trailing
1390 [22415] stdio: setvbuf can lead to invalid free/segfault
1391 [22432] build: Non-deterministic build
1392 [22439] malloc: malloc_info should compute summary statistics for all sub-
1394 [22442] network: if_nametoindex could report index for the wrong
1395 networking interface
1396 [22446] build: aliasing violation calling readlink in handle_request
1397 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1398 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1399 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1400 __nscd_hash/__nss_hash
1401 [22463] network: p_secstodate overflow handling
1402 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1403 [22478] libc: sigwait can fail with EINTR
1404 [22505] libc: ldconfig processes include directive in locale-specific
1406 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1407 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1408 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1409 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1410 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1411 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1412 same as for Croatian
1413 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1414 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1415 [22577] libc: missing newline after "cannot allocate TLS data structures
1417 [22588] manual: manual/conf.texi: missing underscore in front of
1419 [22593] math: nextafter and nexttoward are declared with const attribute
1420 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1421 [22603] string: ia64 memchr overflows internal pointer check
1422 [22605] libc: SH clone does not set the exit code correctly
1423 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1425 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1426 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1427 modified in case of success
1428 [22614] build: gcc: error: unrecognized command line option ā-no-pieā
1429 [22615] manual: manual: ambiguous wording about errno value in case of
1431 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1433 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1434 binaries or if /proc is not mounted (CVE-2017-16997)
1435 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1436 [22630] build: $(no-pie-ldflag) is no longer effective
1437 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1438 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1439 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1440 [22637] nptl: guard size is subtracted from thread stack size instead of
1442 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1443 [22657] localedata: hu_HU: Avoid double space in date
1444 [22660] math: fmax, fmin sNaN handling on alpha
1445 [22664] libc: New warning of GCC8
1446 [22665] math: alpha: ceil and floor raise inexact exceptions
1447 [22666] math: alpha: trunc raise inexact exceptions
1448 [22667] libc: makecontext lacks stack alignment on i386
1449 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1450 [22679] libc: getcwd(3) can succeed without returning an absolute path
1452 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1453 elision and tunables
1454 [22687] math: [powerpc-nofpu] complex long double functions spurious
1456 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1457 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1458 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1460 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1461 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1463 [22701] nis: Incomplete removal of libnsl
1464 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1465 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1466 [22715] dynamic-link: FAIL: elf/tst-audit10
1467 [22719] libc: Backtrace tests fail on hppa
1468 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1469 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1470 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1471 before the first call to crypt_r () in crypt/badsalttest.c
1478 * A per-thread cache has been added to malloc. Access to the cache requires
1479 no locks and therefore significantly accelerates the fast path to allocate
1480 and free small amounts of memory. Refilling an empty cache requires locking
1481 the underlying arena. Performance measurements show significant gains in a
1482 wide variety of user workloads. Workloads were captured using a special
1483 instrumented malloc and analyzed with a malloc simulator. Contributed by
1484 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1486 * Unicode 10.0.0 Support: Character encoding, character type info, and
1487 transliteration tables are all updated to Unicode 10.0.0, using
1488 generator scripts contributed by Mike FABIAN (Red Hat).
1489 These updates cause user visible changes, especially the changes in
1490 wcwidth for many emoji characters cause problems when emoji sequences
1491 are rendered with pango, see for example:
1492 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1494 * Collation of Hungarian has been overhauled and is now consistent with "The
1495 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1498 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1500 - The GNU C Library will now detect when /etc/resolv.conf has been
1501 modified and reload the changed configuration. The new resolver option
1502 āno-reloadā (RES_NORELOAD) disables this behavior.
1504 - The GNU C Library now supports an arbitrary number of search domains
1505 (configured using the āsearchā directive in /etc/resolv.conf);
1506 previously, there was a hard limit of six domains. For backward
1507 compatibility, applications that directly modify the ā_resā global
1508 object are still limited to six search domains.
1510 - When the ārotateā (RES_ROTATE) resolver option is active, the GNU C
1511 Library will now randomly pick a name server from the configuration as a
1512 starting point. (Previously, the second name server was always used.)
1514 * The tunables feature is now enabled by default. This allows users to tweak
1515 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1517 * New function reallocarray, which resizes an allocated block (like realloc)
1518 to the product of two sizes, with a guaranteed clean failure upon integer
1519 overflow in the multiplication. Originally from OpenBSD, contributed by
1520 Dennis Wƶlfing and RĆ¼diger Sonderfeld.
1522 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1523 These are extended versions of preadv and pwritev, respectively, taking an
1524 additional flags argument. The set of supported flags depends on the
1525 running kernel; full support currently requires kernel 4.7 or later.
1527 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1528 create a new session ID for the spawned process. This feature is
1529 scheduled to be added to the next major revision of POSIX; for the time
1530 being, it is available under _GNU_SOURCE.
1532 * errno.h is now safe to use from C-preprocessed assembly language on all
1533 supported operating systems. In this context, it will only define the
1534 Exxxx constants, as preprocessor macros expanding to integer literals.
1536 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1537 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1538 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1539 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1541 To compile programs that use this feature, the compiler must support
1542 128-bit floating point with the type name _Float128 (as defined by TS
1543 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1544 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1545 must be defined to make the new interfaces visible.
1547 The new functions and macros correspond to those present for other
1548 floating-point types (except for a few obsolescent interfaces not
1549 supported for the new type), with F128 or f128 suffixes; for example,
1550 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1551 printf or scanf formats for the new type; the strfromf128 and strtof128
1552 interfaces should be used instead.
1554 Deprecated and removed features, and other changes affecting compatibility:
1556 * The synchronization that pthread_spin_unlock performs has been changed to
1557 now be equivalent to a C11 atomic store with release memory order to the
1558 spin lock's memory location. Previously, several (but not all)
1559 architectures used stronger synchronization (e.g., containing what is
1560 often called a full barrier). This change can improve performance, but
1561 may affect odd fringe uses of spin locks that depend on the previous
1562 behavior (e.g., using spin locks as atomic variables to try to implement
1563 Dekker's mutual exclusion algorithm).
1565 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1568 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1569 will only be built and installed when the GNU C Library is configured with
1570 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1571 as TIRPC or rpcsvc-proto, to be used.
1573 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1574 libnss_compat, are deprecated, and will not be built or installed by
1577 The NIS(+) support library, libnsl, is also deprecated. By default, a
1578 compatibility shared library will be built and installed, but not headers
1579 or development libraries. Only a few NIS-related programs require this
1580 library. (In particular, the GNU C Library has never required programs
1581 that use 'gethostbyname' to be linked with libnsl.)
1583 Replacement implementations based on TIRPC, which additionally support
1584 IPv6, are available from <https://github.com/thkukuk/>. The configure
1585 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1586 name service modules, to be built and installed.
1588 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1589 support is enabled, the configured recursive resolver must support EDNS.
1590 (Responding to EDNS-enabled queries with responses which are not
1591 EDNS-enabled is fine, but FORMERR responses are not.)
1593 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1594 servers have not supported this opcode for a long time.
1596 * The _res_opcodes variable has been removed from libresolv. It had been
1597 exported by accident.
1599 * <string.h> no longer includes inline versions of any string functions,
1600 as this kind of optimization is better done by the compiler. The macros
1601 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1603 * The nonstandard header <xlocale.h> has been removed. Most programs should
1604 use <locale.h> instead. If you have a specific need for the definition of
1605 locale_t with no other declarations, please contact
1606 libc-alpha@sourceware.org and explain.
1608 * The obsolete header <sys/ultrasound.h> has been removed.
1610 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1612 * The obsolete function cfree has been removed. Applications should use
1615 * The stack_t type no longer has the name struct sigaltstack. This changes
1616 the C++ name mangling for interfaces involving this type.
1618 * The ucontext_t type no longer has the name struct ucontext. This changes
1619 the C++ name mangling for interfaces involving this type.
1621 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1622 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1623 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1624 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1625 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1626 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1627 fpregset_t type no longer has the name struct fpu. This changes the C++
1628 name mangling for interfaces involving those types.
1630 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1631 synced with the kernel:
1633 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1634 are not supported on this architecture and have been removed.
1636 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1637 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1638 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1640 Programs that assume the GET/SETREGS ptrace requests are universally
1641 available will now fail to build, instead of malfunctioning at runtime.
1643 Changes to build and runtime requirements:
1645 * Linux kernel 3.2 or later is required at runtime, on all architectures
1646 supported by that kernel. (This is a change from version 2.25 only for
1649 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1651 * On most architectures, GCC 4.9 or later is required to build the GNU C
1652 Library. On powerpc64le, GCC 6.2 or later is required.
1654 Older GCC versions and non-GNU compilers are still supported when
1655 compiling programs that use the GNU C Library. (We do not know exactly
1656 how old, and some GNU extensions to C may be _de facto_ required. If you
1657 are interested in helping us make this statement less vague, please
1658 contact libc-alpha@sourceware.org.)
1660 Security related changes:
1662 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1663 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1665 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1666 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1668 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1669 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1672 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1673 fixed (CVE-2017-12133).
1675 The following bugs are resolved with this release:
1677 [984] network: Respond to changed resolv.conf in gethostbyname
1678 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1679 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1681 [12189] libc: __stack_chk_fail should not attempt a backtrace
1683 [14096] time: Race condition on timezone/tst-timezone.out
1684 [14172] localedata: az_IR: new locale
1685 [14995] build: glibc fails to build if gold is the default linker, even if
1687 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1688 [16637] network: inet_pton function is accepting IPv6 with bad format
1689 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1690 x86 and other generic code
1691 [16875] localedata: ko_KR: fix lang_name
1692 [17225] localedata: ar_SY: localized month names for May and June are
1694 [17297] localedata: da_DK: wrong date_fmt string
1695 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1696 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1697 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1698 [19066] localedata: ar_SA abbreviated day and month names are in English
1699 [19569] network: resolv: Support an arbitrary number of search domains
1700 [19570] network: Implement random DNS server selection in the stub
1702 [19838] locale: localedef fails on PA-RISC
1703 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1704 order of 0D36 and 0D37
1705 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1707 [20098] libc: FAIL: debug/backtrace-tst on hppa
1708 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1710 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1712 [20313] localedata: Update locale data to Unicode 9.0
1713 [20424] manual: Document how to provide a malloc replacement
1714 [20496] localedata: agr_PE: new language locale AwajĆŗn / Aguaruna (agr)
1716 [20686] locale: Add el_GR@euro to SUPPORTED.
1717 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1718 failures consistently
1719 [21015] dynamic-link: Document and fix --enable-bind-now
1720 [21016] nptl: pthread_cond support is broken on hppa
1721 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1722 frame-pointer on i386
1723 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1725 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1726 [21088] libc: Build fails with --enable-static-nss
1727 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1728 generic c code is used
1729 [21109] libc: Tunables broken on big-endian
1730 [21112] math: powf has large ulp errors with base close to 1 and exponent
1732 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1734 [21120] malloc: glibc malloc is incompatible with GCC 7
1735 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1737 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1738 (-0.0) when linking with -lieee
1739 [21171] math: log10, log2 and lgamma return incorrect results
1740 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1741 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1742 [21207] localedata: ce_RU: update weekdays from CLDR
1743 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1744 [21217] localedata: Update months from CLDR-31
1745 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1746 [21243] libc: support_delete_temp_file should issue warning for failed
1748 [21244] libc: support resolv_test_start() socket fd close should be
1750 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1751 new posix_spawn implementation
1752 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1753 leads to lower CPU frequency
1754 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1755 [21261] libc: [sparc64] bits/setjmp.h namespace
1756 [21267] network: [mips] bits/socket.h IOC* namespace
1757 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1758 [21270] libc: mmap64 silently truncates large offset values
1759 [21275] libc: posix_spawn always crashes on ia64 now
1760 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1761 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1762 [21289] libc: Incorrect declaration for 32-bit platforms with
1763 _FILE_OFFSET_BITS=64 causes build error
1764 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1765 not support gethostbyname4_r
1766 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1768 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1770 [21340] libc: Support POSIX_SPAWN_SETSID
1771 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1772 [21359] network: ns_name_pack needs additional byte in destination buffer
1773 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1774 against fragmentation attacks (CVE-2017-12132)
1775 [21369] network: resolv: Remove EDNS fallback
1776 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1778 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1779 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1780 [21393] stdio: Missing dup3 error check in freopen, freopen64
1781 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1782 [21399] localedata: Bad description for U00EC in
1783 localedata/charmaps/CP1254
1784 [21411] malloc: realloc documentation error
1785 [21426] network: sys/socket.h uio.h namespace
1786 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1787 [21445] libc: signal.h bsd_signal namespace
1788 [21455] network: Network headers stdint.h namespace
1789 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1791 [21475] network: resolv: Overlong search path is truncated mid-label
1792 [21511] libc: sigstack namespace
1793 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1794 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1795 bits/syscall.h: No such file or directory
1796 [21517] libc: struct sigaltstack namespace
1797 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1798 [21533] localedata: Update locale data to Unicode 10.0
1800 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1801 junk at end of line, first unrecognized character is `@'
1802 [21538] libc: SIG_HOLD missing for XPG4
1803 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1804 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1805 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1806 [21543] libc: sigevent namespace
1807 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1808 size for general purpose registers in mcontext_t structure
1809 [21550] libc: sigwait namespace
1810 [21552] libc: XPG4 bsd_signal namespace
1811 [21554] libc: sigpause namespace
1812 [21560] libc: sys/wait.h signal.h namespace
1813 [21561] libc: waitid namespace
1814 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1815 '/usr/include/stdlib.h': Permission denied
1816 [21575] libc: sys/wait.h missing struct rusage definition
1817 [21584] libc: sigaltstack etc namespace
1818 [21597] libc: siginterrupt namespace
1819 [21607] math: hppa: FAIL: math/test-tgmath
1820 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1822 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1823 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1824 stack and heap (CVE-2017-1000366)
1825 [21625] libc: wait3 namespace
1826 [21654] nss: Incorrect pointer alignment in NSS group merge result
1828 [21657] network: Parse interface zone id for node-local multicast
1829 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1831 [21666] libc: .symver is used on common symbol
1832 [21668] network: resolv: res_init cross-thread broadcast introduces race
1834 [21687] math: tgmath.h totalorder, totalordermag return type
1835 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1837 [21696] libc: Incorrect assumption of of __cpu_mask in
1838 posix/sched_cpucount.c
1839 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1840 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1842 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1843 leading to relocation crash
1844 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1845 `resolv_conf_matches (resp, conf)' failed.
1846 [21710] localedata: Added Samoan language locale for Samoa
1847 [21711] localedata: Pashto yesstr/nostr locale are missing
1848 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1849 __have_pthread_attr_t can cause redefinition of typedef āpthread_attr_tā
1850 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1851 [21723] localedata: yesstr/nostr missing for Chinese language locale
1852 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1854 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1856 [21728] localedata: New Locale for Tongan language
1857 [21729] localedata: incorrect LC_NAME fields for hi_IN
1858 [21733] localedata: yesstr and nostr are missing for zh_HK
1859 [21734] localedata: Missing yesstr and nostr are for kw_GB
1860 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1861 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1862 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1863 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1865 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1867 [21749] localedata: Wrong abbreviated day name (āabdayā) for
1869 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1870 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1871 [21759] localedata: missing yesstr and nostr for Tigrinya
1872 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1873 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1874 [21767] localedata: Missing Bislama locales
1875 [21768] localedata: Missing yesstr and nostr for aa_ET
1876 [21770] localedata: Missing Field in li_NL
1877 [21778] nptl: Robust mutex may deadlock
1878 [21779] libc: MicroBlaze segfaults when loading libpthread
1879 [21783] localedata: Fix int_select international_call_prefixes
1880 [21784] localedata: Inconsistency in country_isbn
1881 [21788] localedata: Missing Country Postal Abbreviations
1882 [21794] localedata: Added-country_isbn-for-Italy
1883 [21795] localedata: Add/Fix country_isbn for France
1884 [21796] localedata: Added country_isbn for Republic of Korea
1885 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1886 [21799] localedata: Added int_select international_call_prefixes
1887 [21801] localedata: Added int_select international_call_prefixes
1888 [21804] nptl: Double semicolon in thread-shared-types.h
1889 [21807] localedata: LC_ADDRESS fix for pap_CW
1890 [21808] localedata: Fix LC_ADDRESS for pap_AW
1891 [21821] localedata: Added country_name in mai_IN
1892 [21822] localedata: Fix LC_TIME for mai_IN
1893 [21823] localedata: missing yesstr, nostr for sa_IN
1894 [21825] localedata: Fix name_mrs for mag_IN
1895 [21828] localedata: 2.26 changelog should mention user visible changes
1897 [21835] localedata: Added Maithili language locale for Nepal
1898 [21838] localedata: Removed redundant data for the_NP
1899 [21839] localedata: Fix LC_MONETARY for ta_LK
1900 [21844] localedata: Fix Latin characters and Months Sequence.
1901 [21848] localedata: Fix mai_NP Title Name
1906 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1907 24731-2:2010, is supported to enable declarations of functions from that
1908 TR. Note that not all functions from that TR are supported by the GNU C
1911 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1912 18661-1:2014, is supported to enable declarations of functions and macros
1913 from that TS. Note that not all features from that TS are supported by
1916 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1917 18661-4:2015, is supported to enable declarations of functions and macros
1918 from that TS. Note that most features from that TS are not supported by
1921 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1922 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1923 Since the GNU C Library defaults to a much newer revision of POSIX, this
1924 will only affect programs that specifically request an old conformance
1925 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1926 see a change in the visible declarations, but a program compiled with
1927 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1930 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1931 defined by all multithreaded code, but glibc has not required this for
1934 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1935 means that in a future release, the macros āmajorā, āminorā, and āmakedevā
1936 will only be available from <sys/sysmacros.h>.
1938 These macros are not part of POSIX nor XSI, and their names frequently
1939 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1940 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1941 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1944 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1945 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1946 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1948 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1949 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1950 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1951 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1952 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1953 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1954 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1955 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1956 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1957 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1958 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1961 * New <math.h> features are added from TS 18661-1:2014:
1963 - Signaling NaN macros: SNANF, SNAN, SNANL.
1965 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1966 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1967 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1969 - llogb functions: the llogb, llogbf and llogbl functions, and the
1970 FP_LLOGB0 and FP_LLOGBNAN macros.
1972 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1975 - Comparison macros: iseqsig.
1977 - Classification macros: iscanonical, issubnormal, iszero.
1979 - Total order functions: totalorder, totalorderf, totalorderl,
1980 totalordermag, totalordermagf, totalordermagl.
1982 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1984 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1985 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1987 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1988 are added to libc. They convert a floating-point number into string.
1990 * Most of glibc can now be built with the stack smashing protector enabled.
1991 It is recommended to build glibc with --enable-stack-protector=strong.
1992 Implemented by Nick Alcock (Oracle).
1994 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1995 intended to be used instead of memset() to erase sensitive data after use;
1996 the compiler will not optimize out calls to explicit_bzero even if they
1997 are "unnecessary" (in the sense that no _correct_ program can observe the
1998 effects of the memory clear).
2000 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
2001 to float instead of double. This does not affect the ABI of any libraries
2002 that are part of the GNU C Library, but may affect the ABI of other
2003 libraries that use this type in their interfaces.
2005 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
2006 float_t and double_t types are now defined to long double instead of float
2007 and double. These options are not the default, and this does not affect
2008 the ABI of any libraries that are part of the GNU C Library, but it may
2009 affect the ABI of other libraries that use this type in their interfaces,
2010 if they are compiled or used with those options.
2012 * The getentropy and getrandom functions, and the <sys/random.h> header file
2015 * The buffer size for byte-oriented stdio streams is now limited to 8192
2016 bytes by default. Previously, on Linux, the default buffer size on most
2017 file systems was 4096 bytes (and thus remains unchanged), except on
2018 network file systems, where the buffer size was unpredictable and could be
2019 as large as several megabytes.
2021 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
2022 for the Linux quota interface which predates kernel version 2.4.22 has
2025 * The malloc_get_state and malloc_set_state functions have been removed.
2026 Already-existing binaries that dynamically link to these functions will
2027 get a hidden implementation in which malloc_get_state is a stub. As far
2028 as we know, these functions are used only by GNU Emacs and this change
2029 will not adversely affect already-built Emacs executables. Any undumped
2030 Emacs executables, which normally exist only during an Emacs build, should
2031 be rebuilt by re-running ā./configure; makeā in the Emacs build tree.
2033 * The āip6-dotintā and āno-ip6-dotintā resolver options, and the
2034 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
2035 āno-ip6-dotintā had already been the default, and support for the
2036 āip6-dotintā option was removed from the Internet in 2006.
2038 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
2039 flag from <resolv.h> have been removed. The option relied on a
2040 backwards-incompatible DNS extension which was never deployed on the
2043 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
2044 RES_BLAST defined in the <resolv.h> header file have been deprecated.
2045 They were already unimplemented.
2047 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
2048 _res.flags are deprecated. The flag was standardized in RFC 2133, but
2049 removed again from the IETF name lookup interface specification in RFC
2050 2553. Applications should use getaddrinfo instead.
2052 * DNSSEC-related declarations and definitions have been removed from the
2053 <arpa/nameser.h> header file, and libresolv will no longer attempt to
2054 decode the data part of DNSSEC record types. Previous versions of glibc
2055 only implemented minimal support for the previous version of DNSSEC, which
2056 is incompatible with the currently deployed version.
2058 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
2059 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
2060 <arpa/nameser.h> header file because the distinction between RR types and
2061 meta-RR types is not officially standardized, subject to revision, and
2062 thus not suitable for encoding in a macro.
2064 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
2065 and rhook members of the res_state type in <resolv.h> have been removed.
2066 The glibc stub resolver did not support these hooks, but the header file
2067 did not reflect that.
2069 * For multi-arch support it is recommended to use a GCC which has
2070 been built with support for GNU indirect functions. This ensures
2071 that correct debugging information is generated for functions
2072 selected by IFUNC resolvers. This support can either be enabled by
2073 configuring GCC with '--enable-gnu-indirect-function', or by
2074 enabling it by default by setting 'default_gnu_indirect_function'
2075 variable for a particular architecture in the GCC source file
2078 * GDB pretty printers have been added for mutex and condition variable
2079 structures in POSIX Threads. When installed and loaded in gdb these pretty
2080 printers show various pthread variables in human-readable form when read
2081 using the 'print' or 'display' commands in gdb.
2083 * Tunables feature added to allow tweaking of the runtime for an application
2084 program. This feature can be enabled with the '--enable-tunables' configure
2085 flag. The GNU C Library manual has details on usage and README.tunables has
2086 instructions on adding new tunables to the library.
2088 * A new version of condition variables functions have been implemented in
2089 the NPTL implementation of POSIX Threads to provide stronger ordering
2092 * A new version of pthread_rwlock functions have been implemented to use a more
2093 scalable algorithm primarily through not using a critical section anymore to
2096 Security related changes:
2098 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
2099 have been created with makecontext could fail to terminate due to a
2100 missing .cantunwind annotation. This has been observed to lead to a hang
2101 (denial of service) in some Go applications compiled with gccgo. Reported
2102 by Andreas Schwab. (CVE-2016-6323)
2104 * The DNS stub resolver functions would crash due to a NULL pointer
2105 dereference when processing a query with a valid DNS question type which
2106 was used internally in the implementation. The stub resolver now uses a
2107 question type which is outside the range of valid question type values.
2110 The following bugs are resolved with this release:
2112 [4099] stdio: Overly agressive caching by stream i/o functions.
2113 [7065] build: Support building glibc with -fstack-protector or -fstack-
2115 [9842] localedata: en_CA: incorrect date format
2116 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2117 before it started waiting
2118 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2119 [15765] nptl: sem_open is wrongly a cancellation point
2120 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2121 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2123 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2124 library linked with pthread
2125 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2126 "FIXME: Ingo" issue)
2127 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2128 [17252] libc: getrandom and getentropy syscall
2129 [17730] malloc: thread-local storage is sometimes improperly free()'d
2130 after being __libc_memalign()'d
2131 [18241] stdio: failed fseek on memstream does not set errno and can fail
2133 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2135 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2136 PTHREAD_PRIO_INHERIT mutex on ARM
2137 [18784] network: res_query and related function crash for special record
2138 type queries (CVE-2015-5180)
2139 [19380] math: strtod does not raise "inexact"
2140 [19387] string: Integer overflow in memchr
2141 [19390] string: Integer overflow in strncat
2142 [19398] build: linknamespace tests fail with massively parallel build
2143 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2145 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2146 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2147 [19514] libc: [PATCH] Fix spelling errors in spelling
2148 "implement"/"implementation" in several places
2149 [19582] network: Deprecate RES_USE_INET6
2150 [19673] manual: clog10 docs appear to be erroneous
2151 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2152 causes a segmentation fault
2153 [19826] libc: invalid pointer returned from __tls_get_addr with static
2155 [20016] network: resolv: Remove hooks support from the API
2156 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2158 [20033] math: [x86_64] vectorized math function don't call the __finite
2160 [20116] nptl: use after free in pthread_create
2161 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2162 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2164 [20311] nptl: please install proc_service.h
2165 [20366] libc: Compilation errors in installed headers in strict-compliance
2167 [20370] malloc: malloc: Arena free list management is still racy
2168 (incorrect fix in bug 19243)
2169 [20386] libc: assert (X = 0) does not result in GCC warning
2170 [20432] malloc: malloc: Minimize interface required for interposition
2171 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2172 in _Unwind_Backtrace (CVE-2016-6323)
2173 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2174 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2176 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2177 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2178 [20477] network: resolv: incorrect double-checked locking related to
2180 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2182 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2184 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2185 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2186 cause transition penalty
2187 [20517] math: sparcv9 missing fdiml compat symbol
2188 [20524] manual: strverscmp is inconsistent
2189 [20525] libc: <sys/quota.h> should be based on kernel headers
2190 [20539] math: GCC 7 -static -lm fails to link at -O3
2191 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2193 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2195 [20591] network: Remove obsolete DNSSEC support
2196 [20592] network: DNS resource record type classification macros in
2197 <arpa/nameser.h> are incorrect
2198 [20593] network: Update DNS RR type definitions
2199 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2200 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2202 [20629] network: libresolv: Remove support for bitstring labels
2204 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2205 assertion: "maxidx >= 2"
2206 [20660] math: [arm] Use VSQRT
2207 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2208 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2209 [20689] libc: Test for FMA should also check for AVX.
2210 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2211 [20715] math: iszero macro breaks existing code
2212 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2213 [20728] libc: powerpc: Missing TOC stub in clone
2214 [20729] build: glibc-2.24 fails to build for i486 with -Os
2215 [20750] build: Build fails with default PIE enabled gcc-6.x
2216 [20768] math: [alpha] sqrt fegetenv namespace
2217 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2219 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2220 __FLT_EVAL_METHOD__ is 2
2221 [20790] network: rpcgen buffer overrun in get_prog_declaration
2222 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2223 [20829] libc: crypt snprintf namespace
2224 [20847] libc: tst-vfork3 failure
2225 [20855] math: Default bits/mathdef.h has inappropriate float_t
2226 [20859] math: [sh4] FP_ILOGB0 invalid
2227 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2228 U+20AC), not same as GBK
2229 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2230 [20916] math: pow handling of sNaN arguments
2231 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2232 [20919] math: Bad pow (qNaN, 0) result with -lieee
2233 [20940] math: hypot sNaN handling
2234 [20947] math: fmax, fmin sNaN handling
2235 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2236 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2238 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2239 [20973] nptl: robust mutexes: Lost wake-ups
2240 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2241 [20978] nis: strlen on null pointer in nss_nisplus
2242 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2244 [21014] string: i686 memchr overflows internal pointer check
2245 [21019] libc: [mips] n32 lseek incorrect on overflow
2246 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2247 [21026] libc: [MIPS] readahead syscall is broken on n64
2248 [21028] math: Fallback fesetexceptflag should always succeed
2249 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2250 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2252 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2253 [21061] librt: [microblaze] librt lost clock_* exports
2254 [21073] libc: tunables: insecure environment variables passed to
2255 subprocesses with AT_SECURE
2256 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2260 * The minimum Linux kernel version that this version of the GNU C Library
2261 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2262 kernel version 2.6.32 or later suffices (on architectures that already
2263 required kernel versions more recent than 3.2, those requirements remain
2264 unchanged). Linux 3.2 or later kernel headers are required on all
2267 * The pap_AN locale has been deleted. This has been deprecated for a long
2268 time. It has been replaced by pap_AW & pap_CW, both of which have long
2269 been included in previous releases.
2271 * The readdir_r and readdir64_r functions have been deprecated. It is
2272 recommended to use readdir and readdir64 instead.
2274 * The type āunion waitā has been removed. It was deprecated in the early
2275 1990s and never part of POSIX. Application code should use the int type
2276 instead of āunion waitā.
2278 * A new NSS action is added to facilitate large distributed system
2279 administration. The action, MERGE, allows remote user stores like LDAP
2280 to be merged into local user stores like /etc/groups in order to provide
2281 easy to use, updated, and managed sets of merged credentials. The new
2282 action can be used by configuring it in /etc/nsswitch.conf:
2283 group: files [SUCCESS=merge] nis
2284 Implemented by Stephen Gallagher (Red Hat).
2286 * The deprecated __malloc_initialize_hook variable has been removed from the
2289 * The long unused localedef --old-style option has been removed. It hasn't
2290 done anything in over 16 years. Scripts using this option can safely
2293 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2294 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2295 return the next representable value in the direction of positive infinity
2296 and the nextdown functions return the next representable value in the
2297 direction of negative infinity. These are currently enabled as GNU
2300 Security related changes:
2302 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2303 could result in a stack overflow when getnetbyname was called with an
2304 overly long name. (CVE-2016-3075)
2306 * Previously, getaddrinfo copied large amounts of address data to the stack,
2307 even after the fix for CVE-2013-4458 has been applied, potentially
2308 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2309 instead. Reported by Michael Petlan. (CVE-2016-3706)
2311 * The glob function suffered from a stack-based buffer overflow when it was
2312 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2313 Reported by Alexander Cherepanov. (CVE-2016-1234)
2315 * The Sun RPC UDP client could exhaust all available stack space when
2316 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2317 alloca plugin for GCC. (CVE-2016-4429)
2319 * The IPv6 name server management code in libresolv could result in a memory
2320 leak for each thread which is created, performs a failing naming lookup,
2321 and exits. Over time, this could result in a denial of service due to
2322 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2324 The following bugs are resolved with this release:
2326 [1170] localedata: ne_NP: update Nepali locale definition file
2327 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2329 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2330 [6796] math: fdim() does not set errno on overflow
2331 [10354] libc: posix_spawn should use vfork() in more cases than presently
2332 [11213] localedata: localedata: add copyright disclaimer to locale files
2333 [12143] localedata: chr_US: new Cherokee locale
2334 [12450] localedata: sgs_LT: new locale
2335 [12676] localedata: ln_CD: new locale
2336 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2338 [13304] math: fma, fmaf, fmal produce wrong results
2339 [14259] build: --localedir arg to configure is ignored
2340 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2341 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2342 [14934] localedata: es_CL: wrong first weekday chilean locale
2343 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2345 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2347 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2348 [15368] nptl: raise() is not async-signal-safe
2349 [15479] math: ceil, floor, round and trunc raise inexact exception
2350 [15578] localedata: kk_KZ: various updates
2351 [16003] localedata: pap_AN: punt old locale
2352 [16137] localedata: iw_IL: punt old locale
2353 [16190] localedata: eo: new esperanto locale
2354 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2355 [16742] malloc: race condition: pthread_atfork() called before first
2356 malloc() results in unexpected locking behaviour/deadlocks
2357 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2359 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2360 [17565] localedata: pt_PT: wrong (work-)week start
2361 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2362 [17950] build: Build fails with -msse
2363 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2364 [18433] libc: posix_spawn does not return correctly upon failure to
2366 [18453] localedata: charmaps/IBM875: incorrect codes
2367 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2369 [18896] localedata: he_IL: improvements for currency
2370 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2371 Romanian locale data
2372 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2374 [19056] libc: Deprecate readdir_r
2375 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2377 [19198] localedata: nl_NL: small improvements for Dutch locales
2378 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2379 nameservers (CVE-2016-5417)
2380 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2382 [19400] locale: Language missing in "iso-639.def", trivial fix in
2384 [19431] malloc: Deadlock between fflush, getdelim, and fork
2385 [19505] libc: Incorrect file descriptor validity checks in
2386 posix_spawn_file_actions_add{open,close,dup2}
2387 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2388 when using RTLD_NEXT
2389 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2390 `intl/{gettextP,loadinfo}.h'
2391 [19534] libc: execle, execlp may use malloc
2392 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2393 [19573] network: res_nclose and __res_maybe_init disagree about name
2394 server initialization, breaking Hesiod
2395 [19575] localedata: Status of GB18030 tables
2396 [19581] localedata: sr_* date_fmt string contains additional newline
2397 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2399 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2400 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2401 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2402 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2404 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2406 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2408 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2409 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2410 [19633] locale: strfmon_l applies global locale to number formatting
2411 [19642] network: Memory leak in getnameinfo
2412 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2413 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2415 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2416 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2418 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2419 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2421 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2423 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2425 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2426 pointers and lengths in error-case.
2427 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2428 report errors on UTF-16 surrogates values.
2429 [19755] nscd: nscd assertion failure in gc
2430 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2431 [19759] libc: mempcpy shouldn't be inlined
2432 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2433 [19765] libc: s390 needs an optimized mempcpy
2434 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2435 NAME_MAX limit assumption (CVE-2016-1234)
2436 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2437 [19787] network: Missing and incorrect truncation checks in getnameinfo
2438 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2440 [19791] network: Assertion failure in res_query.c with un-connectable name
2442 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2443 [19822] math: libm.so install clobbers old version
2444 [19825] network: resolv: send_vc can return uninitialized data in second
2445 response to getaddrinfo
2446 [19830] network: nss_dns: should check RDATA length against buffer length
2447 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2448 confronted with A/AAAA records of invalid size
2449 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2450 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2451 [19853] stdio: Printing IBM long double in decimal with high precision is
2453 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2454 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2455 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2457 [19865] network: Assertion failure or memory leak in
2458 _nss_dns_getcanonname_r
2459 [19868] network: nss_dns: netent code does not skip over non-PTR records
2460 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2462 [19881] string: Improve x86-64 memset
2463 [19907] string: Incorrect memcpy tests
2464 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2466 [19925] libc: termios.h XCASE namespace
2467 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2468 [19929] libc: limits.h NL_NMAX namespace
2469 [19931] stdio: Memory leak in vfprintf
2470 [19957] libc: clone(CLONE_VM) access invalid parent memory
2471 [19963] localedata: en_IL: New locale
2472 [19989] stdio: stdio.h cuserid namespace
2473 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2475 [19996] locale: langinfo.h nl_langinfo_l namespace
2476 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2477 [20010] network: getaddrinfo: Stack overflow in hostent translation
2479 [20012] stdio: libio: fmemopen append mode failure
2480 [20014] stdio: stdio.h namespace for pre-threads POSIX
2481 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2482 [20023] libc: fcntl.h timespec namespace
2483 [20024] math: [x86_64] vectorized sincos trashes the stack
2484 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2485 [20041] time: sys/time.h timespec namespace
2486 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2487 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2488 [20051] libc: ttyslot in wrong header under wrong conditions
2489 [20054] libc: gethostname not declared for XPG4
2490 [20055] libc: termios.h missing tcgetsid for XPG4
2491 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2493 [20073] libc: sys/stat.h fchmod namespace
2494 [20074] libc: stdlib.h rand_r namespace
2495 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2496 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2498 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2499 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2501 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2502 [20119] libc: Wrong mask for processors level type from CPUID
2503 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2504 AS not supporting AVX512
2505 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2507 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2508 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2510 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2511 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2512 [20178] libc: posix_spawn{p} should not call exit
2513 [20191] stdio: libio: vtables hardening
2514 [20195] string: FMA4 detection requires CPUID execution with register
2516 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2517 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2519 [20212] math: acos (sNaN) returns sNaN
2520 [20213] math: asin (sNaN) returns sNaN
2521 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2522 [20218] math: [i386] asinhl (sNaN) returns sNaN
2523 [20219] math: [i386] atanhl (sNaN) returns sNaN
2524 [20222] stdio: fopencookie: Mangle function pointers
2525 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2526 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2527 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2529 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2530 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2531 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2532 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2533 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2534 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2535 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2536 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2537 [20240] math: modf (sNaN) returns sNaN
2538 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2539 [20250] math: frexp (sNaN) returns sNaN
2540 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2541 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2543 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2544 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2545 subscript is below array bounds [-Werror=array-bounds]
2546 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2547 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2549 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2550 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2552 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2553 "invalid" exceptions
2554 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2555 [20316] localedata: id_ID: Februari instead of Pebruari
2556 [20327] string: POWER8 strcasecmp returns incorrect result
2557 [20347] math: Failure: Test: j0_downward (0xap+0)
2558 [20348] libc: FAIL: misc/tst-preadvwritev64
2559 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2560 [20350] libc: There is no test for p{read,write}64
2561 [20357] math: Incorrect cos result for 1.5174239687223976
2562 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2566 * Unicode 8.0.0 Support: Character encoding, character type info, and
2567 transliteration tables are all updated to Unicode 8.0.0, using new
2568 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2569 These updates cause user visible changes, such as the fixes for bugs
2570 89, 16061, and 18568.
2572 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2573 kernel-internal CPU set size. This means that requests that change the
2574 CPU affinity which failed before (for example, an all-ones CPU mask) will
2575 now succeed. Applications that need to determine the effective CPU
2576 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2577 setting it because the kernel can adjust it (and the previous size check
2578 would not detect this in the majority of cases).
2580 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2581 the following new symbols are used: fts64_children, fts64_close,
2582 fts64_open, fts64_read and fts64_set.
2584 * getaddrinfo now detects certain invalid responses on an internal netlink
2585 socket. If such responses are received, an affected process will
2586 terminate with an error message of "Unexpected error <number> on netlink
2587 descriptor <number>" or "Unexpected netlink response of size <number> on
2588 descriptor <number>". The most likely cause for these errors is a
2589 multi-threaded application which erroneously closes and reuses the netlink
2590 file descriptor while it is used by getaddrinfo.
2592 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2593 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2594 unnecessary serialization of memory allocation requests across threads.
2595 The defect is now corrected. Users should see a substantial increase in
2596 the concurent throughput of allocation requests for applications which
2597 trigger this bug. Affected applications typically create and
2598 destroy threads frequently. (Bug 19048 was reported and analyzed by
2601 * There is now a --disable-timezone-tools configure option for disabling the
2602 building and installing of the timezone related utilities (zic, zdump, and
2603 tzselect). This is useful for people who build the timezone data and code
2604 independent of the GNU C Library.
2606 * The obsolete header <regexp.h> has been removed. Programs that require
2607 this header must be updated to use <regex.h> instead.
2609 * The obsolete functions bdflush, create_module, get_kernel_syms,
2610 query_module and uselib are no longer available to newly linked binaries;
2611 the header <sys/kdaemon.h> has been removed. These functions and header
2612 were specific to systems using the Linux kernel and could not usefully be
2613 used with the GNU C Library on systems with version 2.6 or later of the
2616 * Optimized string, wcsmbs and memory functions for IBM z13.
2617 Implemented by Stefan Liebler.
2619 * Newly linked programs that define a variable called signgam will no longer
2620 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2621 require signgam to be set by those functions must ensure that they use the
2622 variable provided by the GNU C Library and declared in <math.h>, without
2623 defining their own copy.
2625 * The minimum GCC version that can be used to build this version of the GNU
2626 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2627 still be used to compile programs using the GNU C Library.
2629 Security related changes:
2631 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2632 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2634 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2635 the pointer guard feature. It is always enabled. Previously,
2636 LD_POINTER_GUARD could be used to disable security hardening in binaries
2637 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2640 * An integer overflow in hcreate and hcreate_r could lead to an
2641 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2643 * The catopen function no longer has unbounded stack usage. Reported by
2644 Max. (CVE-2015-8779)
2646 * The nan, nanf and nanl functions no longer have unbounded stack usage
2647 depending on the length of the string passed as an argument to the
2648 functions. Reported by Joseph Myers. (CVE-2014-9761)
2650 * A stack-based buffer overflow was found in libresolv when invoked from
2651 libnss_dns, allowing specially crafted DNS responses to seize control
2652 of execution flow in the DNS client. The buffer overflow occurs in
2653 the functions send_dg (send datagram) and send_vc (send TCP) for the
2654 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2655 family. The use of AF_UNSPEC triggers the low-level resolver code to
2656 send out two parallel queries for A and AAAA. A mismanagement of the
2657 buffers used for those queries could result in the response of a query
2658 writing beyond the alloca allocated buffer created by
2659 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2660 the overflow. Thanks to the Google Security Team and Red Hat for
2661 reporting the security impact of this issue, and Robert Holiday of
2662 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2664 The following bugs are resolved with this release:
2666 [89] localedata: Locales nb_NO and nn_NO should transliterate ƦĆøĆ„
2667 [887] math: Math library function "logb" and "nextafter" inconsistent
2668 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2669 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2670 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2671 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2673 [4404] localedata: German translation of "Alarm clock" is misleading
2674 [6799] math: nextafter() and nexttoward() doen't set errno on
2675 overflow/underflow errors
2676 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2678 [10432] nis: _nss_nis_setnetgrent assertion failure
2679 [11460] libc: fts has no LFS support
2680 [12926] network: getaddrinfo()/make_request() may spin forever
2681 [13065] nptl: Race condition in pthread barriers
2682 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2683 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2685 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2686 [14912] libc: Rename non-installed bits/*.h headers
2687 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2688 [15367] math: Let gcc use __builtin_isinf
2689 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2690 [15421] math: lgamma wrongly sets signgam for ISO C
2691 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2692 FE_INVALID with argument out of range
2693 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2695 [15786] dynamic-link: ifunc resolver functions can smash function
2697 [15918] math: Unnecessary check for equality in hypotf()
2698 [16061] localedata: Review / update transliteration data
2699 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2701 [16141] time: strptime %z offset restriction
2702 [16171] math: drem should be alias of remainder
2703 [16296] math: fegetround is pure?
2704 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2705 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2707 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2708 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2710 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2711 "Exception "Inexact" set" on ppc32
2712 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2713 [16517] math: Missing underflow exception from tanf/tan/tanl
2714 [16519] math: Missing underflow exception from sinhf
2715 [16520] math: Missing underflow exception from tanhf
2716 [16521] math: Missing underflow exception from exp2
2717 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2719 [16734] stdio: fopen calls mmap to allocate its buffer
2720 [16961] math: nan function incorrect handling of bad sequences
2721 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2722 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2723 [16985] locale: localedef: confusing error message when opening output
2725 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2726 [17197] locale: Redundant shift character in iconv conversion output at
2728 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2729 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2730 [17250] dynamic-link: static linking breaks nss loading
2731 (getaddrinfo/getpwnam/etc...)
2732 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2734 [17441] math: isnan() should use __builtin_isnan() in GCC
2735 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2736 (related to lock elision)
2737 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2738 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2739 [17887] time: strptime should be able to parse "+01:00" style timezones
2740 [17905] libc: catopen() Multiple unbounded stack allocations
2742 [18084] libc: backtrace (..., 0) dumps core on x86
2743 [18086] libc: nice() sets errno to 0 on success
2744 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2745 is too large (CVE-2015-8778)
2746 [18251] dynamic-link: SONAME missing when audit modules provides path
2747 [18265] libc: add attributes for wchar string and memory functions
2748 [18370] math: csqrt missing underflows
2749 [18421] libc: [hppa] read-only segment has dynamic relocations
2750 [18472] libc: Obsolete syscall wrappers should be compat symbols
2751 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2752 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2753 [18525] localedata: Remove locale timezone information
2754 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2755 [18568] localedata: Update locale data to Unicode 8.0
2756 [18589] locale: sort-test.sh fails at random
2757 [18595] math: ctan, ctanh missing underflows
2758 [18604] libc: assert macro-expands its argument
2759 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2760 contains a vector instruction exception.
2761 [18611] math: j1, jn missing errno setting on underflow
2762 [18618] localedata: sync Chechen locale definitions with other *_RU
2764 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2765 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2766 [18665] network: In send_dg, the recvfrom function is NOT always using the
2767 buffer size of a newly created buffer (CVE-2015-7547)
2768 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2770 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2772 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2773 [18699] math: tilegx cproj() for various complex infinities does not yield
2775 [18724] libc: Harden put*ent functions against data injection
2776 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2777 [18755] build: build errors with -DNDEBUG
2778 [18757] stdio: fmemopen fails to set errno on failure
2779 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2781 [18781] libc: openat64 lacks O_LARGEFILE
2782 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2783 error: canāt find a register in class āR1_REGSā while reloading āasmā
2784 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2785 [18790] math: [ldbl-128ibm] tanhl inaccurate
2786 [18795] libc: stpncpy fortification misses buffer lengths that are
2787 statically too large
2788 [18796] build: build fails for --disable-mathvec
2789 [18803] math: hypot missing underflows
2790 [18820] stdio: fmemopen may leak memory on failure
2791 [18823] math: csqrt spurious underflows
2792 [18824] math: fma spurious underflows
2793 [18825] math: pow missing underflows
2794 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2795 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2796 [18870] build: sem_open.c fails to compile with missing symbol
2798 [18872] stdio: Fix memory leak in printf_positional
2799 [18873] libc: posix_fallocate overflow check ineffective
2800 [18875] math: Excess precision leads incorrect libm
2801 [18877] libc: arm: mmap offset regression
2802 [18887] libc: memory corruption when using getmntent on blank lines
2803 [18918] localedata: hu_HU: change time to HH:MM:SS format
2804 [18921] libc: Regression: extraneous stat() and fstat() performed by
2806 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2807 binaries (CVE-2015-8777)
2808 [18951] math: tgamma missing underflows
2809 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2811 [18953] localedata: lt_LT: change currency symbol to the euro
2812 [18956] math: powf inaccuracy
2813 [18961] math: [i386] exp missing underflows
2814 [18966] math: [i386] exp10 missing underflows
2815 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2816 [18969] build: multiple string test failures due to missing locale
2818 [18970] libc: Reference of pthread_setcancelstate in libc.a
2819 [18977] math: float / long double Bessel functions not in XSI POSIX
2820 [18980] math: i386 libm functions return with excess range and precision
2821 [18981] math: i386 scalb*, ldexp return with excess range and precision
2822 [18982] stdio: va_list and vprintf
2823 [18985] time: Passing out of range data to strftime() causes a segfault
2825 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2826 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2827 [19012] locale: iconv_open leaks memory on error path
2828 [19016] math: clog, clog10 inaccuracy
2829 [19018] nptl: Mangle function pointers in tls_dtor_list
2830 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2831 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2832 [19048] malloc: malloc: arena free list can become cyclic, increasing
2834 [19049] math: [powerpc] erfc incorrect zero sign
2835 [19050] math: [powerpc] log* incorrect zero sign
2836 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2837 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2838 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2839 [19074] network: Data race in _res_hconf_reorder_addrs
2840 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2841 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2842 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2844 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2846 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2847 [19086] manual: posix_fallocate64 documented argument order is wrong.
2848 [19088] math: lround, llround missing exceptions close to overflow
2850 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2851 [19095] math: dbl-64 lrint incorrect for 64-bit long
2852 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2853 [19124] dynamic-link: ld.so failed to build with older assmebler
2854 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2855 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2856 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2857 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2858 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2859 pthread_setaffinity_np
2860 [19156] math: [ldbl-128] j0l spurious underflows
2861 [19164] nptl: tst-getcpu fails with many possible CPUs
2862 [19168] math: math/test-ildoubl and math/test-ldouble failure
2863 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2864 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2866 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2867 (FE_NOMASK_ENV) do not clear SSE exceptions
2868 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2869 _int_new_arena/reused_arena
2870 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2871 [19201] math: dbl-64 remainder incorrect sign of zero result
2872 [19205] math: bits/math-finite.h conditions do not match math.h and
2874 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2875 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2876 for C99-based standards
2877 [19212] libc: features.h not -Wundef clean
2878 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2880 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2881 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2882 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2884 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2885 "inexact" exceptions
2886 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2888 [19242] libc: strtol incorrect in Turkish locales
2889 [19243] malloc: reused_arena can pick an arena on the free list, leading
2890 to an assertion failure and reference count corruption
2891 [19253] time: tzset() ineffective when temporary TZ did not include DST
2893 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2894 [19270] math: [hppa] Shared libm missing __isnanl
2895 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2896 MAP_HUGETLB and MAP_STACK defines
2897 [19313] nptl: Wrong __cpu_mask for x32
2898 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2899 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2900 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2901 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2902 [19363] time: x32: times() return value wrongly truncates/sign extends
2904 [19367] dynamic-link: Improve branch prediction on Silvermont
2905 [19369] network: Default domain name not reset by res_ninit when "search"
2906 / "domain" entry is removed from resolv.conf
2907 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2909 [19385] localedata: bg_BG: time separator should be colon, not comma
2910 [19408] libc: linux personality syscall wrapper may erroneously return an
2911 error on 32-bit architectures
2912 [19415] libc: dladdr returns wrong names on hppa
2913 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2914 IBM905, IBM907, and IBM909
2915 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2916 [19443] build: build failures with -DDEBUG
2917 [19451] build: Make check fails on test-double-vlen2
2918 [19462] libc: Glibc failed to build with -Os
2919 [19465] math: Wrong code with -Os
2920 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2922 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2924 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2925 [19486] math: S390: Math tests fail with "Exception Inexact set".
2926 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2927 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2929 [19590] math: Fail to build shared objects that use libmvec.so functions.
2933 * The following bugs are resolved with this release:
2935 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2936 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2937 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2938 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2939 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2940 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2941 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2942 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2943 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2944 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2945 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2946 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2947 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2948 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2949 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2950 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2951 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2952 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2953 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2954 18657, 18676, 18694, 18696, 18887.
2956 * Cache information can be queried via sysconf() function on s390 e.g. with
2957 _SC_LEVEL1_ICACHE_SIZE as argument.
2959 * A buffer overflow in gethostbyname_r and related functions performing DNS
2960 requests has been fixed. If the NSS functions were called with a
2961 misaligned buffer, the buffer length change due to pointer alignment was
2962 not taken into account. This could result in application crashes or,
2963 potentially arbitrary code execution, using crafted, but syntactically
2964 valid DNS responses. (CVE-2015-1781)
2966 * The time zone file parser has been made more robust against crafted time
2967 zone files, avoiding heap buffer overflows related to the processing of
2968 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2969 large time zone data files. Overly long time zone specifiers in the TZ
2970 variable no longer result in stack overflows and crashes.
2972 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2973 for LD and GD on x86 and x86-64, has been implemented. You will need
2974 binutils-2.24 or later to enable this optimization.
2976 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2977 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2978 Hat). These updates cause user visible changes, such as the fix for bug
2981 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2982 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2983 condition in some applications.
2985 * Added vector math library named libmvec with the following vectorized x86_64
2986 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2988 The library can be disabled with --disable-mathvec. Use of the functions is
2989 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2990 Shared library libmvec.so is linked in as needed when using -lm (no need to
2991 specify -lmvec explicitly for not static builds).
2992 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2994 * A new fmemopen implementation has been added with the goal of POSIX
2995 compliance. The new implementation fixes the following long-standing
2996 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2997 old implementation is still present for use be by existing binaries.
2999 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
3000 releases. It has been fixed to match 2.19 and older, but binaries built
3001 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
3003 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
3004 Contributed by Roland McGrath (Google).
3006 * The header <regexp.h> is deprecated, and will be removed in a future
3007 release. Use of this header will trigger a deprecation warning.
3008 Application developers should update their code to use <regex.h> instead.
3010 This header was formerly part of SUS, but was deprecated in 1994 and
3011 removed from the standard in 2001. Also, the glibc implementation
3012 leaks memory. See BZ#18681 for more details.
3016 * The following bugs are resolved with this release:
3018 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
3019 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
3020 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
3021 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
3022 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
3023 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
3024 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
3025 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
3026 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
3027 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
3030 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
3031 too little memory for the to-be-scanned arguments and overflow the
3032 allocated buffer. The implementation now correctly computes the required
3033 buffer size when using malloc, and switches to malloc from alloca as
3036 * A new semaphore algorithm has been implemented in generic C code for all
3037 machines. Previous custom assembly implementations of semaphore were
3038 difficult to reason about or ensure that they were safe. The new version
3039 of semaphore supports machines with 64-bit or 32-bit atomic operations.
3040 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
3041 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
3043 * Port to Altera Nios II has been contributed by Mentor Graphics.
3045 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
3046 implementations for powerpc64/powerpc64le.
3047 Implemented by Adhemerval Zanella (IBM).
3049 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
3050 and powerpc64le. This may improve lock scaling of existing programs on
3051 HTM capable systems. The lock elision code is only enabled with
3052 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
3053 powerpc will issue a transaction abort on every syscall to avoid side
3054 effects being visible outside transactions.
3056 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
3057 AArch64. Contributed by ARM Ltd.
3059 * i386 memcpy functions optimized with SSE2 unaligned load/store.
3061 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
3062 under certain input conditions resulting in the execution of a shell for
3063 command substitution when the application did not request it. The
3064 implementation now checks WRDE_NOCMD immediately before executing the
3065 shell and returns the error WRDE_CMDSUB as expected.
3067 * CVE-2012-3406 printf-style functions could run into a stack overflow when
3068 processing format strings with a large number of format specifiers.
3070 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
3071 infinite loop if the DNS response contained a PTR record of an unexpected
3074 * The minimum GCC version that can be used to build this version of the GNU
3075 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
3076 still be used to compile programs using the GNU C Library.
3078 * The GNU C Library is now built with -Werror by default. This can be
3079 disabled by configuring with --disable-werror.
3081 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
3083 * The obsolete sigvec function has been removed. This was the original
3084 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
3085 programs have been using instead for about 25 years. Of course, ABI
3086 compatibility for old binaries using sigvec remains intact.
3088 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
3089 with newer versions of bison.
3091 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
3092 The original MIPS o32 hard-float ABI requires an FPU where double-precision
3093 registers overlay two consecutive single-precision registers. MIPS32R2
3094 introduced a new FPU mode (FR=1) where double-precision registers extend the
3095 corresponding single-precision registers which is incompatible with the
3096 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
3097 require the use of FR=1 making a transition necessary. New o32 ABI
3098 extensions enable users to migrate over time from the original o32 ABI
3099 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
3100 tracks the ABI of any loaded object and verifies that new objects are
3101 compatible. Mode transitions will also be requested as required and
3102 unsupportable objects will be rejected. The ABI checks include both soft and
3103 hard float ABIs for o32, n32 and n64.
3105 GCC 5 with GNU binutils 2.25 onwards:
3106 It is strongly recommended that all o32 system libraries are built using the
3107 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3108 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3109 compiler using --with-fp-32=xx to set this by default.
3113 * The following bugs are resolved with this release:
3115 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3116 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3117 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3118 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3119 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3120 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3121 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3122 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3123 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3124 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3125 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3126 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3127 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3128 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3129 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3131 * Reverted change of ABI data structures for s390 and s390x:
3132 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3133 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3134 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3135 are preserved pointing straight to the same implementation as the old ones.
3136 Given that, new callers will simply provide a too-big buffer to these
3137 functions. Any applications/libraries out there that embed jmp_buf or
3138 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3139 against 2.19 headers will have to rebuilt again. This is necessary in any
3140 case to revert the breakage in their ABI caused by the glibc change.
3142 * Support for file description locks is added to systems running the
3143 Linux kernel. The standard file locking interfaces are extended to
3144 operate on file descriptions, not file descriptors, via the use of
3145 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3146 are associated with an open file instead of a process.
3148 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3150 * The minimum Linux kernel version that this version of the GNU C Library
3151 can be used with is 2.6.32.
3153 * Running the testsuite no longer terminates as soon as a test fails.
3154 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3155 with PASS or FAIL lines for individual tests. A summary of the results is
3156 printed, including a list of failing lists, and "make check" exits with
3157 error status if there were any unexpected failures. "make check
3158 stop-on-test-failure=y" may be used to keep the old behavior.
3160 * The am33 port, which had not worked for several years, has been removed
3163 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3164 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3165 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3166 conflicted with POSIX (support for which was removed in 2.19), the
3167 interfaces those macros enabled remain available when compiling with
3168 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3169 test macros defined.
3171 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3173 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3174 This may improve lock scaling of existing programs on TX capable systems.
3175 The lock elision code is only built with --enable-lock-elision=yes and
3176 then requires a GCC version supporting the TX builtins. With lock elision
3177 default mutexes are elided via __builtin_tbegin, if the cpu supports
3178 transactions. By default lock elision is not enabled and the elision code
3181 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3182 copy the path argument. This allowed programs to cause posix_spawn to
3183 deference a dangling pointer, or use an unexpected pathname argument if
3184 the string was modified after the posix_spawn_file_actions_addopen
3187 * All supported architectures now use the main glibc sysdeps directory
3188 instead of some being in a separate "ports" directory (which was
3189 distributed separately before glibc 2.17).
3191 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3192 On configurations that support it (all Linux configurations), it's now
3193 used regardless of the --enable-add-ons switch to configure. It is no
3194 longer possible to build such configurations without pthreads support.
3196 * Locale names, including those obtained from environment variables (LANG
3197 and the LC_* variables), are more tightly checked for proper syntax.
3198 setlocale will now fail (with EINVAL) for locale names that are overly
3199 long, contain slashes without starting with a slash, or contain ".." path
3200 components. (CVE-2014-0475) Previously, some valid locale names were
3201 silently replaced with the "C" locale when running in AT_SECURE mode
3202 (e.g., in a SUID program). This is no longer necessary because of the
3205 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3206 with application code using Intel MPX instructions. (With all previous
3207 versions, the MPX register state could be clobbered when making calls
3208 into or out of a shared library.) Note that while the new dynamic
3209 linker is compatible with all known x86 hardware whether or not it
3210 supports Intel MPX, some x86 instruction-set emulators might fail to
3211 handle the new instruction encodings. This is known to affect Valgrind
3212 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3213 release), and might affect other tools that do instruction emulation.
3215 * Support for loadable gconv transliteration modules has been removed.
3216 The support for transliteration modules has been non-functional for
3217 over a decade, and the removal is prompted by security defects. The
3218 normal gconv conversion modules are still supported. Transliteration
3219 with //TRANSLIT is still possible, and the //IGNORE specifier
3220 continues to be supported. (CVE-2014-5119)
3222 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3223 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3224 resulting a denial-of-service security vulnerability in applications which
3225 use functions related to iconv. (CVE-2014-6040)
3229 * The following bugs are resolved with this release:
3231 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3232 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3233 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3234 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3235 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3236 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3237 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3238 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3239 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3240 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3241 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3242 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3243 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3244 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3245 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3246 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3247 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3248 16431, 16453, 16474, 16506, 16510, 16529
3250 * Slovenian translations for glibc messages have been contributed by the
3251 Translation Project's Slovenian team of translators.
3253 * The public headers no longer use __unused nor __block. This change is to
3254 support compiling programs that are derived from BSD sources and use
3255 __unused internally, and to support compiling with Clang's -fblock
3256 extension which uses __block.
3258 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3259 large collation sequences to optimize multiple passes. This cache
3260 computation may overflow for large collation sequences and may cause a
3261 stack or buffer overflow. This is now fixed to use a slower algorithm
3262 which does not use a cache if there is an integer overflow.
3264 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3265 rules for large collation sequences to optimize multiple passes and falls
3266 back to alloca if malloc fails, resulting in a possible stack overflow.
3267 The implementation now falls back to an uncached collation sequence lookup
3270 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3271 initialized for static applications resulting in the security feature
3272 being disabled. The pointer guard is now correctly initialized to a
3273 random value for static applications. Existing static applications need
3274 to be recompiled to take advantage of the fix (bug 15754).
3276 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3277 to the d_name member of struct dirent, or omit the terminating NUL
3278 character. (Bugzilla #14699).
3280 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3281 aligned_alloc functions could allocate too few bytes or corrupt the
3282 heap when passed very large allocation size values (Bugzilla #15855,
3285 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3286 for AF_INET6 has been fixed (Bugzilla #16072).
3288 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3289 pap_CW, quz_PE, the_NP.
3291 * Substantially revised locales: gd_GB, ht_HT
3293 * The LC_ADDRESS field was updated to support country_car for almost all
3296 * ISO 1427 definitions were updated.
3298 * ISO 3166 definitions were updated.
3300 * The localedef utility now supports --big-endian and --little-endian
3301 command-line options to generate locales for a different system from that
3302 for which the C library was built.
3304 * Binary locale files now only depend on the endianness of the system for
3305 which they are generated and not on other properties of that system. As a
3306 consequence, binary files generated with new localedef may be incompatible
3307 with old versions of the GNU C Library, and binary files generated with
3308 old localedef may be incompatible with this version of the GNU C Library,
3309 in the following circumstances:
3311 + Locale files may be incompatible on m68k systems.
3313 + Locale archive files (but not separate files for individual locales) may
3314 be incompatible on systems where plain "char" is signed.
3316 * The configure option --disable-versioning has been removed. Builds with
3317 --disable-versioning had not worked for several years.
3319 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3320 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3322 * SystemTap probes for malloc have been introduced.
3324 * SystemTap probes for slow multiple precision fallback paths of
3325 transcendental functions have been introduced.
3327 * Support for powerpc64le has been added.
3329 * The soft-float powerpc port now supports e500 processors.
3331 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3333 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3334 set of header declarations that are enabled by default, even when other
3335 feature test macros or compiler options such as -std=c99 would otherwise
3336 disable some of those declarations.
3338 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3339 conflict with POSIX. The libbsd-compat library (which was a dummy library
3340 that did nothing) has also been removed.
3342 * Preliminary documentation about Multi-Thread, Async-Signal and
3343 Async-Cancel Safety has been added.
3345 * Change of ABI data structures for s390 and s390x:
3346 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3347 allow for future hardware extensions. All library functions that accept or
3348 return these structures were versioned in order to provide backwards
3349 compatibility with existing code. However, not all cases can be handled
3350 with interface versioning. If an application embeds either structure into
3351 another structure and that structure is passed to another compilation unit
3352 which expects the newer larger-sized object then any access to the new
3353 fields will result in undefined behaviour. Similarly any access to fields
3354 that were moved by the enlarging of the structures will cause undefined
3355 behaviour. To fix the undefined behaviour all objects that are part of the
3356 final in-memory image must agree on the size of structures, and this may
3357 require recompilation.
3361 * The following bugs are resolved with this release:
3363 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3364 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3365 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3366 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3367 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3368 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3369 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3370 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3371 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3372 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3373 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3374 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3375 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3378 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3379 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3380 Distributions can re-enable building and using pt_chown via the new configure
3381 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3382 considerable security risks and should only be used if the distribution
3383 understands and accepts the risks.
3385 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3388 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3389 fixed (Bugzilla #15330).
3391 * Add support for calling C++11 thread_local object destructors on thread
3392 and program exit. This needs compiler support for offloading C++11
3393 destructor calls to glibc.
3395 * Improved worst case performance of libm functions with double inputs and
3398 * Support for priority inherited mutexes in pthread condition variables on
3399 non-x86 architectures.
3401 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3403 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3405 * Optimized string functions for ARM. Implemented by Will Newton and
3408 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3410 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3413 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3414 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3416 * Added a benchmark framework to track performance of functions in glibc.
3418 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3419 It is based on draft TS 18661 and currently enabled as a GNU extension.
3421 * On Linux, the clock function now uses the clock_gettime system call
3422 for improved precision, rather than old times system call.
3424 * Added support for version-3 tz format files. This is needed when using
3425 the tz database release 2013e or later, and affects a few unusual cases --
3426 currently only TZ='America/Godthab' for time stamps after 2037.
3428 * Added new API functions pthread_getattr_default_np and
3429 pthread_setattr_default_np to get and set the default pthread
3430 attributes of a process.
3432 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3433 This may improve lock scaling of existing programs on TSX capable systems.
3434 When the --enable-lock-elision=yes parameter is specified at configure
3435 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3438 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3439 availability). Implemented by Ryan S. Arnold.
3441 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3445 * The following bugs are resolved with this release:
3447 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3448 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3449 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3450 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3451 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3452 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3453 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3454 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3455 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3456 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3457 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3458 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3459 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3460 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3461 14879, 14889, 14893, 14898, 14914.
3463 * Optimization of memcpy for MIPS.
3465 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3466 EMFILE has been fixed (Bugzilla #14889).
3468 * The add-on ports collection is now distributed in the "ports" subdirectory
3469 of the main GNU C Library distribution, rather than separately.
3471 * Port to ARM AArch64 contributed by Linaro.
3473 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3474 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3476 Implemented by Andreas Krebbel.
3478 * The new function secure_getenv allows secure access to the environment,
3479 returning NULL if running in a SUID/SGID process. This function replaces
3480 the internal function __secure_getenv.
3482 * SystemTap static probes have been added into the dynamic linker.
3483 Implemented by Gary Benson.
3485 * Optimizations of string functions strstr, strcasestr and memmem.
3486 Implemented by Maxim Kuvyrkov.
3488 * The minimum Linux kernel version that this version of the GNU C Library
3489 can be used with is 2.6.16.
3491 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3492 powerpc POWER7. Implemented by Will Schmidt.
3494 * New configure option --disable-nscd builds the C library such that it
3495 never attempts to contact the Name Service Caching Daemon (nscd).
3496 New configure option --disable-build-nscd avoids building nscd itself;
3497 this is the default if --disable-nscd is used.
3499 * Improved support for cross-compilation, including cross-testing and
3500 bootstrap builds without a previously built glibc.
3502 * Several testsuite tests are now able to test multiple IFUNC variants of an
3503 interface, rather than just testing the one that would be chooen by
3506 * New configure options --with-bugurl and --with-pkgversion, for
3507 distributors to use to embed their bug-reporting and package version
3508 information in --help and --version output.
3510 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3511 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3512 allows creation of chroots without the procfs mounted on /proc.
3514 * The `crypt' function now fails if passed salt bytes that violate the
3515 specification for those values. On Linux, the `crypt' function will
3516 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3517 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3518 when the mode is enabled.
3520 * The `clock_*' suite of functions (declared in <time.h>) is now available
3521 directly in the main C library. Previously it was necessary to link with
3522 -lrt to use these functions. This change has the effect that a
3523 single-threaded program that uses a function such as `clock_gettime' (and
3524 is not linked with -lrt) will no longer implicitly load the pthreads
3525 library at runtime and so will not suffer the overheads associated with
3526 multi-thread support in other code such as the C++ runtime library.
3528 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3533 * The following bugs are resolved with this release:
3535 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3536 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3537 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3538 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3539 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3540 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3541 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3542 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3543 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3544 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3545 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3546 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3547 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3548 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3549 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3550 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3551 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3552 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3553 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3554 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3555 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3556 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3559 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3560 configuring glibc with:
3561 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3562 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3563 Implemented by H.J. Lu.
3567 + define static_assert
3569 + do not declare gets
3571 + declare at_quick_exit and quick_exit also for ISO C11
3573 + aligned_alloc. NB: The code is deliberately allows the size parameter
3574 to not be a multiple of the alignment. This is a moronic requirement
3575 in the standard but it is only a requirement on the caller, not the
3578 + timespec_get added
3580 + uchar.h support added
3582 + CMPLX, CMPLXF, CMPLXL added
3584 Implemented by Ulrich Drepper.
3586 * Support for the IA-64 has been moved to ports.
3588 * Remove support for anything but ELF binary format
3590 * Checking versions of poll, ppoll added.
3591 Implemented by Ulrich Drepper.
3593 * More generic and 64-bit performance optimizations to math functions.
3594 Implemented by Ulrich Drepper.
3596 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3597 headers and functions available at compile time as they were before
3598 version 2.14. This option will be removed at some time in the future
3599 after the TI-RPC library becomes fully sufficient for the needs of
3600 existing applications.
3602 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3603 Note that glibc is not expected to work with any Linux kernel version
3606 * New header <sys/auxv.h> and function getauxval allowing easy access to
3607 the AT_* key-value pairs passed from the Linux kernel. The header also
3608 defines the HWCAP_* bits associated with the AT_HWCAP key.
3610 * New locales: mag_IN
3612 * New configure option --enable-systemtap builds SystemTap static probes
3613 into libc for setjmp and longjmp and into libpthread for various operations.
3614 So far the setjmp/longjmp probes and some of the libpthread probes are
3615 provided only for i*86 and x86_64.
3616 Implemented by Roland McGrath and Rayson Ho.
3618 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3620 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3623 * More optimized functions for SPARC. Implemented by David S. Miller.
3625 * Improved support for cross-compilation, especially bootstrap builds
3626 without a previously built glibc.
3628 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3629 Chris Metcalf from Tilera.
3631 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3632 now supported for ARM processors.
3634 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3635 as the name of the dynamic linker, to distinguish it from the
3636 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3638 * Support for CRIS has been removed from ports.
3640 * A new class of installed header has been documented for low-level
3641 platform-specific functionality. PowerPC added the first instance with a
3642 function to provide time base register access. Contributed by Tulio
3643 Magno Quites Machado Filho.
3645 * ix86 configurations now install header files that are consistent with
3646 what x86-64 configurations install. These same header files can be used
3647 for -m32, -m64, or -mx32 builds.
3648 Contributed by H.J. Lu.
3650 * Math library bug fixes. A thorough audit of all open math library bugs was
3651 conducted by Joseph Myers. Significant progress was made on many math
3652 library bugs resulting in more accurate exceptions and function results.
3653 Many thanks to all those that contributed including Andreas Jaeger for his
3654 patch review and work on the x87 trigonometric instruction issues.
3656 * Timezone data is no longer installed. Timezone-related binaries and scripts
3657 will continue to be installed. Users should obtain their timezone data from
3658 their distribution provider or from the tzdata package at
3659 <ftp://munnari.oz.au/pub/>.
3663 * The following bugs are resolved with this release:
3665 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3666 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3667 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3668 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3669 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3670 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3671 13484, 13506, 13515, 13523, 13524, 13538, 13540
3673 * New program pldd to list loaded object of a process
3674 Implemented by Ulrich Drepper.
3676 * Add nss_db support back to glibc. No more dependency on Berkeley db
3677 and support for initgroups lookups.
3678 Implemented by Ulrich Drepper.
3680 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3681 Contributed by HJ Lu.
3683 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3684 Contributed by HJ Lu.
3686 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3687 on x86-32 and x86-64.
3688 Contributed by Liubov Dmitrieva.
3690 * Optimized strchr and strrchr for SSE on x86-32.
3691 Contributed by Liubov Dmitrieva.
3693 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3694 for x86-64 and x86-32.
3695 Contributed by Liubov Dmitrieva.
3697 * New interfaces: scandirat, scandirat64
3698 Implemented by Ulrich Drepper.
3700 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3701 Implemented by Ulrich Drepper.
3703 * nscd now also caches the netgroup database.
3704 Implemented by Ulrich Drepper.
3706 * Integrate libm with gcc's -ffinite-math-only option.
3707 Implemented by Ulrich Drepper.
3709 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3710 to math functions. Implemented by Ulrich Drepper.
3712 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3713 Implemented by Ulrich Drepper.
3715 * New Linux interfaces: process_vm_readv, process_vm_writev
3717 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3718 Implemented by Ulrich Drepper.
3720 * Optimized nearbyint and strcasecmp for PPC.
3721 Implemented by Adhemerval Zanella.
3723 * New locales: bho_IN, unm_US, es_CU, ta_LK
3727 * The following bugs are resolved with this release:
3729 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3730 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3731 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3732 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3733 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3734 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3735 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3736 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3737 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3738 12795, 12811, 12813, 12814, 12841
3740 * The RPC implementation in libc is obsoleted. Old programs keep working
3741 but new programs cannot be linked with the routines in libc anymore.
3742 Programs in need of RPC functionality must be linked against TI-RPC.
3743 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3745 Visible changes of this change include (obviously) the inability to link
3746 programs using RPC functions without referencing the TI-RPC library and the
3747 removal of the RPC headers from the glibc headers.
3748 Implemented by Ulrich Drepper.
3750 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3751 syncfs, setns, sendmmsg
3753 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3754 yue_HK, lij_IT, mhr_RU
3756 * New encodings: CP770, CP771, CP772, CP773, CP774
3758 * New program sotruss to trace calls through PLTs
3759 Implemented by Ulrich Drepper.
3761 * The malloc hook implementation is marked deprecated and will be removed
3762 from the default implementation in the next version. The design never
3763 worked ever since the introduction of threads. Even programs which do
3764 not create threads themselves can use multiple threads created internally.
3768 * The following bugs are resolved with this release:
3770 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3771 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3772 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3773 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3776 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3778 * POWER7 optimizations: memset, memcmp, strncmp
3780 * New optimized string functions for x86-64: strnlen (SSE2),
3781 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3782 Implemented by Ulrich Drepper.
3786 * The following bugs are resolved with this release:
3788 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3789 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3790 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3791 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3792 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3793 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3794 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3795 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3797 * New interfaces: pthread_getname_np, pthread_setname_np
3799 * New Linux interface: recvmmsg
3801 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3803 * The dynamic linker now recognizes supported ABI versions from the
3804 EI_ABIVERSION field in the ELF header.
3805 Implemented by Ulrich Drepper.
3807 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3808 will not be used to fill in password fields in the passwd.byname replies.
3809 Instead it is used to synthesize the shadow.byname table, should it be
3810 missing. This is a useful mode in some installations involving Solaris.
3811 Implemented by Ulrich Drepper.
3813 * New locales: kok_IN, sq_MK, cv_RU
3817 * The following bugs are resolved with this release:
3819 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3820 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3821 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3822 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3823 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3824 10789, 10817, 10823, 10840, 10847
3826 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3828 Implemented by Ulrich Drepper.
3830 * Checking version of longjmp added that fails if an uninitialized stack
3831 frame would be created. Implemented by Ulrich Drepper.
3833 * STT_GNU_IFUNC is now supported in static executables.
3834 Implemented by H.J. Lu.
3836 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3838 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3839 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3840 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3841 Contributed by H.J. Lu.
3843 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3844 Implemented by Ulrich Drepper.
3846 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3848 Contributed by H.J. Lu.
3850 * Support for fma instruction in AVX on x86-64.
3851 Implemented by H.J. Lu and Ulrich Drepper.
3853 * AVX support in x86-64 auditing support in ld.so.
3854 Implemented by H.J. Lu.
3856 * STB_GNU_UNIQUE support added.
3857 Implemented by Ulrich Drepper.
3859 * Implement second fallback mode for optimized DNS lookup for even more
3860 broken environments. If two requests from the same port are not
3861 handled correctly close the socket and open a new one before sending
3862 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3863 can be used to select this mode right away, instead of rediscovering the
3864 necessity is every process again.
3865 Implemented by Ulrich Drepper.
3867 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3868 Implemented by Adam Tkac.
3870 * Optimized iconv conversions for S390x.
3871 Implemented by Andreas Krebbel.
3873 * Using condvars with PI mutexes is now more efficient due to kernel
3874 support for requeueing to PI futexes. NPTL support added for x86-64.
3875 Implemented by Ulrich Drepper.
3877 * New locales: ps_AF, my_MM
3881 * The following bugs are resolved with this release:
3883 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3884 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3885 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3886 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3887 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3889 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3890 Implemented by Ulrich Drepper.
3892 * New Linux interfaces: accept4, fallocate, fallocate64.
3893 Implemented by Ulrich Drepper.
3895 * Correct declarations of string function when used in C++ code. This
3896 could lead to compile errors for invalid C++ code.
3898 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3901 * New POSIX 2008 interface: psiginfo
3902 Implemented by Ulrich Drepper.
3904 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3905 Implemented by Ulrich Drepper.
3907 * Support for selecting between multiple function definitions at runtime
3908 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3910 * The libcrypt library can now use the hash function implementations in
3911 NSS. Implemented by Ulrich Drepper.
3913 * The malloc implementation can be compiled to be less memory efficient
3914 but higher performing in multi-threaded programs.
3915 Implemented by Ulrich Drepper.
3917 * New locales: nan_TW@latin, ks_IN
3919 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3920 Implemented by Ulrich Drepper.
3922 * Extended printf hook support. It is possible to use user-defined types
3923 and extend existing format specifiers.
3924 Implemented by Ulrich Drepper.
3926 * Handling for group shadow files has been added.
3927 Implemented by Ulrich Drepper.
3929 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3930 servers (the case, e.g., for some people using the built-in DNS
3931 server in ADSL modems/routers). There is a once-per-process timeout
3932 in case of a broken server. To avoid it, users can run nscd or put
3933 'options single-request' in /etc/resolv.conf.
3934 Implemented by Ulrich Drepper.
3938 * The following bugs are resolved with this release:
3940 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3941 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3942 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3943 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3944 6968, 6974, 6980, 6995, 7008, 7009, 7029
3946 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3947 up at the same time. Implemented by Ulrich Drepper.
3949 * TLS descriptors for LD and GD on x86 and x86-64.
3950 Implemented by Alexandre Oliva.
3952 * getaddrinfo now handles DCCP and UDPlite.
3953 Implemented by Ulrich Drepper.
3955 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3956 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3957 Implemented by Ulrich Drepper.
3959 * New implementation of memmem, strstr, and strcasestr which is O(n).
3960 Implemented by Eric Blake.
3962 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3964 * Implement "e" option for popen to open file descriptor with the
3965 close-on-exec flag set. Implemented by Ulrich Drepper.
3967 * Implement "b" mode for fmemopen. In this mode writes writes don't
3968 implicitly add a NUL byte and seeks from the end of the buffer really
3969 use the buffer end, not the string length as the basis.
3970 Implemented by Ulrich Drepper.
3972 * Many functions, exported and internal, now atomically set the close-on-exec
3973 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3975 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3977 Implemented by Pravin Satpute.
3979 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3983 * The following bugs are resolved with this release:
3985 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3986 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3987 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3988 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3989 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3990 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3991 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3993 * New locales: bo_CN, bo_IN, shs_CA.
3995 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3997 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3998 Implemented by Pravin Satpute.
4000 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
4002 * nscd caches now all timeouts for DNS entries
4003 Implemented by Ulrich Drepper.
4005 * nscd is more efficient and wakes up less often.
4006 Implemented by Ulrich Drepper.
4008 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
4009 vdprintf, and obstack_vprintf.
4010 Implemented by Jakub Jelinek.
4012 * Faster memset for x86-64.
4013 Implemented by Harsha Jagasia and H.J. Lu.
4015 * Faster memcpy on x86.
4016 Implemented by Ulrich Drepper.
4018 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
4019 Implemented by Ulrich Drepper.
4021 * Faster sqrt and sqrtf implemention for some PPC variants.
4022 Implemented by Steven Munroe.
4026 * The following bugs are resolved with this release:
4028 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
4029 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
4030 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
4031 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
4032 5071, 5103, 5104, 5112, 5113, 5184, 5186
4034 * More checking functions: fread, fread_unlocked, open*, mq_open.
4035 Implemented by Jakub Jelinek and Ulrich Drepper.
4037 * Extend fortification to C++. Implemented by Jakub Jelinek.
4039 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
4040 by not recognizing 'a' as a modifier when those specs are requested.
4041 Implemented by Jakub Jelinek.
4043 * PPC optimizations to math and string functions.
4044 Implemented by Steven Munroe.
4046 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
4047 options to be passed. Implemented by Ulrich Drepper.
4049 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
4051 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
4052 Implemented by Ulrich Drepper.
4054 * Handle private futexes in the NPTL implementation.
4055 Implemented by Jakub Jelinek and Ulrich Drepper.
4057 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
4058 Implemented by Roland McGrath and Ulrich Drepper.
4060 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
4062 * SHA-256 and SHA-512 based password encryption.
4063 Implemented by Ulrich Drepper.
4065 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
4066 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
4069 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
4070 Implemented by Ulrich Drepper.
4074 * The following bugs are resolved with this release:
4076 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
4077 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
4078 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
4079 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
4080 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
4081 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
4082 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
4085 * New Linux interfaces: epoll_pwait, sched_getcpu.
4087 * New generic interfaces: strerror_l.
4089 * nscd can now cache the services database. Implemented by Ulrich Drepper.
4093 * The following bugs are resolved with this release:
4095 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
4096 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
4097 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
4098 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
4099 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
4100 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4101 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4102 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4103 3225, 3251, 3252, 3253, 3273
4105 * For Linux, the sorting of addresses returned by getaddrinfo now also
4106 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4107 Implemented by Ulrich Drepper.
4109 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4110 Implemented by Ulrich Drepper.
4112 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4114 * New iconv module for MIK. Contributed by Alexander Shopov.
4116 * For sites with broken group and/or passwd database, the auto-propagate
4117 option of nscd can prevent creating ID lookup entries from the results
4118 of a name lookup and vice versa. This usually is no problem but some
4119 site might have problems with the default behavior.
4120 Implemented by Ulrich Drepper.
4122 * Iterating over entire database in NIS can be slow. With the
4123 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4124 to trade time for memory. The entire database will be read at once.
4125 Implemented by Ulrich Drepper.
4127 * The interfaces introduced in RFC 3542 have been implemented by
4130 * Support for the new ELF hash table format was added by Ulrich Drepper.
4132 * Support for priority inheritance mutexes added by Jakub Jelinek and
4135 * Support for priority protected mutexes added by Jakub Jelinek.
4137 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4138 or_IN, csb_PL, fy_NL, sr_ME.
4142 * More overflow detection functions.
4144 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4145 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4147 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4148 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4149 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4150 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4151 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4152 by Masahide Washizawa.
4154 * It is now possible to install audit libraries for the dynamic linker using
4155 LD_AUDIT. Implemented by Ulrich Drepper.
4157 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4158 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4159 For a libc and libpthread that works well on Linux 2.4 kernels, we
4160 recommend using the stable 2.3 branch.
4162 * The new function open_wmemstream acts like open_memstream,
4163 but uses a wchar_t wide character buffer.
4165 * The new function ppoll is an improved version of poll, similar to pselect.
4167 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4168 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4169 renameat, unlinkat, linkat, symlinkat, readlinkat.
4171 * New Linux kernel system calls: unshare,
4172 inotify_init, inotify_add_watch, inotify_rm_watch.
4174 * The euidaccess function is now also known by the alias eaccess,
4175 for compatibility with some other systems.
4177 * Timezone data updated to 2006b version.
4181 * The following bugs are resolved with this release:
4183 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4184 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4185 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4186 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4187 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4188 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4190 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4192 * As of this release, GCC 4 can be used to compile the C Library.
4194 * Timezone data updated to 2005m version.
4198 * The following bugs are resolved with this release:
4200 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4201 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4202 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4203 777, 787, 821, 822, 823, 825
4205 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4209 * Support for RFC 3678. Real implementations exist only for Linux so far.
4210 Implemented by Ulrich Drepper.
4212 * nscd can now cache entries persistently. Expiring entries are reloaded.
4213 For speedups the cache can be shared in memory with client processes.
4214 Implemented by Ulrich Drepper.
4216 * nscd can now perform SELinux checks.
4217 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4219 * getaddrinfo queries are now cached. Canonical name lookup is performed
4221 Implemented by Ulrich Drepper.
4223 * The nothrow function attribute is used when headers are used by gcc when
4224 compiling C code. This can avoid significant amounts of exception
4227 * The malloc functions perform more error checking and are stricter when
4228 it comes to reacting on errors. The default action is to terminate
4229 the process after showing an error message. Implemented by Ulrich Drepper.
4231 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4232 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4234 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4235 namespaces using the new function dlmopen(). This feature is of course,
4236 like most other dynamic loading functionality, not available in statically
4237 linked applications. Implemented by Ulrich Drepper.
4239 * Low-overhead boundary checking variants of string and some stdio functions
4240 were added. These are to be used in conjunction with a gcc patch by
4241 Jakub Jelinek which adds calls to these functions if possible.
4242 Implemented by Jakub Jelinek and Ulrich Drepper.
4244 * Old code for several operating systems and machine architectures that
4245 have not been in working condition in a long time have been removed from
4246 the main source tree maintained by the GNU C Library's maintainers.
4247 These files are now reside in the separate `ports' source module
4248 that is usable as an add-on when building the library.
4252 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4253 interrogate the dynamic linker, compatible with the Solaris interface.
4255 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4256 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4258 * getifaddrs now uses the netlink interface on Linux to get its information.
4259 Implemented by Thorsten Kukuk.
4261 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4262 Implemented by Ulrich Drepper.
4264 * support for non-executable stacks on x86 has been added. Changes mostly
4267 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4270 * getaddrinfo now performs destination address selection according to
4275 * Thread-safe interfaces for many functions that access locale data
4276 were added in version 2.3, but these features were omitted from NEWS.
4277 Many functions have variants with an `_l' suffix that take a `locale_t'
4278 object as a parameter rather than consulting the current locale.
4279 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4280 create and maintain `locale_t' objects. Additionally, the new function
4281 `uselocale' sets "the current locale" (as used by functions not so
4282 parameterized) set for an individual thread. These features were added
4283 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4285 * The functions getresuid, getresgid, setresuid, and setresgid, which
4286 have long been available on Linux, are now declared in <unistd.h>
4287 and are now also available on the Hurd.
4289 * ELF thread-local storage support (TLS) now works on x86-64.
4291 * The new dynamic string token $LIB is expanded in shared library names.
4292 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4294 * Aldy Hernandez contributed complete software floating point support for
4295 PowerPC machines with no FPU.
4297 * fexecve is implemented on Linux.
4299 * The `btowc' function should work at least twice as fast due to
4300 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4302 * With approriate thread add-ons cancelable functions are now implemented
4303 in libc.so as well. No need to call the function in libpthread. This
4304 change allowed to finally disable the incorrect and expensive handling
4305 of weak definition in ld.so.
4307 * Yet more PLT entries in libc.so have been removed. We finally arrived
4308 at the bare minimum. Startup times improved appropriately.
4310 * Support for the new Linux/x86 system call interface was added. The
4311 AT_SYSINFO auxiliary vector entry is recognized and handled.
4315 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4318 * iconv (the program and the interface) now accepts empty names (excluding
4319 options like //TRANSLIT) to mean "use charset of current locale".
4321 * localedef can now transliterate characters in strings which are not in
4322 the provided charmap. The information from the input locale is used.
4324 * Prelinking support was added for ELF targets. This requires additional
4325 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4327 * Read-only stdio streams now use mmap to speed up operation by eliminating
4328 copying and buffer underflows. To use add 'm' to the mode string of
4329 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4331 * The malloc functions were completely rewritten by Wolfram Gloger based
4332 on Doug Lea's malloc-2.7.0.c.
4334 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4335 implementation of regex.
4337 * Bruno Haible upgraded the iconv and locale implementation to support
4340 * Contents of the LC_* and LANG environment variables in the CEN style are
4341 not recognized anymore. It never was used. Change by Ulrich Drepper.
4343 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4344 thread-local storage (TLS) ABI on some platforms.
4345 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4347 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4348 EUC-JISX0213, and TSCII.
4350 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4351 BSD-compatible interface for getting all network interface addresses.
4352 Implementation for IPv4 by Roland McGrath.
4354 * Loading of locale data is faster due to the introduction of a locale
4355 archive. Implemented by Roland McGrath and Ulrich Drepper.
4357 * Startup times are significantly reduced by not using exported functions
4358 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4361 * Steven Munroe contributed a port to PowerPC64/Linux.
4365 * The Hurd now uses the GNU libio implementation of stdio rather than the
4366 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4368 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4369 with the same behavior as the Linux system call of the same name.
4373 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4374 128-bit long double format.
4376 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4377 IBM1161, and IBM1162 charsets.
4379 * Andreas Jaeger contributed a port to x86-64/Linux.
4381 * Peter Bruin contributed a port to PowerPC/Hurd.
4383 * libc functions using I/O streams now can handle wide-oriented streams
4386 * optimizations in the dynamic linker. Binaries created by recent binutils
4387 versions start up quicker due to reduced time spent on relocations.
4389 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4393 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4394 asinh, atanh, j0 for the 128-bit long double format.
4396 * Bruno Haible updated all the code handling Unicode in some form to
4397 support Unicode 3.1.
4399 * Speed of regex for single-byte locales is back to previous levels.
4400 Patch by Isamu Hasegawa.
4402 * Alpha, SPARC, and IA-64 now also using floating stacks.
4404 * Startup time of internationalized applications greatly improved through
4405 iconv cache. Use iconvconfig to generate the cache file.
4406 Contributed by Ulrich Drepper.
4408 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4409 severe performance problems. Patch by David Mosberger.
4411 * The Hurd port got a lot more functionality like AIO, various stdio
4412 extensions, etc. Mainly done by Roland McGrath.
4414 * mtrace can now lookup symbols in shared libraries.
4418 * Intel's IA-64 math library is largely integrated. It provides fast and
4419 accurate implementatations for most basic and standard math functions
4420 in float, double, and long double format.
4422 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4423 and asin for the 96-bit long double format and asin, log, tan for the
4424 128-bit long double format.
4426 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4427 The basic double functions exist today. Contributed by Abraham Ziv
4428 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4429 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4431 * An asynchronous name lookup library was added. The interface is designed
4432 after POSIX AIO. The proposal was circulated beforehand to get comments.
4433 No negative ones came in. Implemented by Ulrich Drepper.
4435 * Port to S390/64bit contributed by Martin Schwidefsky
4436 <schwidefsky@de.ibm.com>.
4438 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4439 of functions for Linux/IA-64.
4441 * The RPC code is now thread safe. Threads can now use the same service
4442 of different services at the same time. Patch by Eric Norum
4443 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4445 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4446 family of functions for Linux/S390.
4448 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4449 of functions for Linux/x86.
4451 * Port to Linux/CRIS contributed by Axis Communications.
4455 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4456 we can now check for namespace violations and missing declarations. The
4457 result is that almost all headers are now Unix-compliant (as defined in
4458 the upcoming XPG6). The negative side is that some programs might need
4459 corrections, too, if they depend on the incorrect form of the headers in
4460 previous versions which defined too many symbols and included too many
4463 * regex now handles multibyte character sets correctly.
4464 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4466 * iconv (the program) does now conform to the upcoming XPG6 and handles
4467 charmaps. Instead of the charset names the path of charmaps can be
4468 provided and the conversion happens based on this data.
4469 Contributed by Ulrich Drepper.
4471 * The locale program now provides detailed information about the installed
4476 only lists the names of the supported locales
4480 provides details such as country, language, and codeset name.
4481 Contributed by Ulrich Drepper.
4485 * The gencat program now parses the input file according to the charset
4486 selected by the LC_CTYPE category. This is important for stateful
4487 character sets. To make generating catalogs easier there is a way
4488 to overwrite the charset selected by the locale: before the first
4489 message or $ quote line the catalog can contain a line like
4491 $ codeset=ISO-8859-2
4493 to select the charset (ISO-8859-2 in this case).
4495 Implemented by Shinya Hanataka and Ulrich Drepper.
4497 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4498 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4499 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4501 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4502 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4504 * The LANGUAGE environment variable is now ignored unless the locale is
4505 changed from the default "C" locale.
4507 * The usual bug fixes.
4511 * Greg McGary added runtime support for bounds checking using gcc's
4512 new -fbounded-pointers option. ix86 target is complete. PowerPC
4515 * Thorsten Kukuk added secure mode support to nscd.
4517 * The Berkeley db libraries have been removed.
4519 Related, the nss_db module is now in a separate package since it
4520 obviously requires a database library being available.
4522 * Wide character I/O streams implemented by Ulrich Drepper.
4524 * Functions from the extended socket API added by Ulrich Drepper.
4526 * Functions feenableexcept and fedisableexcept to control the
4527 behaviour of individual exceptions have been added by Andreas Jaeger.
4529 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4531 * The resolver code has been updated from bind 8.2.3-T5B which supports
4532 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4535 This change could in some situations effect backward compatibility. Since
4536 now `_res' is a thread-local instead of a global variable, modifying it
4537 in one thread does not have any effect in other threads.
4539 The resolver library was also extended to allow IPv6 as the transport
4540 protocol for the requests. This work was done by Stig Venaas.
4542 * Compatibility code for K&R C compilers has been removed from the
4543 header files. A ISO C compiler is needed to use the library
4544 (conforming to either C89 or C99 standard).
4546 * Complete rewrite of the localedef program to support multibyte character
4547 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4548 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4549 Implemented by Ulrich Drepper.
4551 Bruno Haible significantly improved the generation and use of the data
4552 structures for the wide character tables.
4554 * Plural handling in gettext implemented by Ulrich Drepper.
4556 * The utmp daemon has been removed.
4558 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4560 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4563 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4565 * POSIX barriers implemented by Kaz Kylheku.
4567 * POSIX spawn function family implemented by Ulrich Drepper.
4569 * POSIX spinlocks are now available.
4571 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4573 * the configure option --enable-kernel=X.Y.Z allows to strip out
4574 compatibility for kernel versions before X.Y.Z. This is currently only
4575 implemented for Linux.
4577 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4578 field sin6_scope_id. This means that all programs using IPv6 should be
4579 recompiled. Don't expect binary compatibility with previous glibc
4582 * various conversion modules for IBM character sets contributed by
4585 * IA-64 port by Jes Sorensen and HJ Lu.
4599 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4601 * New xdr functions are added; some rpc functions are now 64bit clean.
4603 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4605 * Fixed known incompatibilities with glibc 2.0.
4607 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4609 * Optimized a number of functions (especially the ELF dynamic loader).
4611 * Update timezone data files.
4613 * lots of charmaps corrections
4615 * some new locale definitions and charmaps
4620 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4621 conform to POSIX member type requirements. Symbol versions have been
4622 adjusted as needed within the library, and for direct use by applications,
4623 but there is potential for problems if third-party libraries use
4624 struct timeval as part of their interface. This does not present
4625 a problem for X and other "essential" system libraries.
4627 * An additional locale model to support C++ Standard Library locale
4628 model and probably more was implemented by Ulrich Drepper.
4630 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4633 * Miles Bader provided the `argp' function family to support hierachical
4634 command line argument parsing, layered on top of getopt.
4636 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4638 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4641 * scanf recognizes the %a and %A format for scanning floating point numbers.
4643 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4644 information and interfaces for the available integer types.
4646 * about 130 new math functions were added to implement the ISO C9x math
4649 * the new header <complex.h> contains definitions of the complex math
4650 functions from ISO C 9X.
4652 * the new header <tgmath.h> defines generic macros to use complex or
4653 real valued functions.
4655 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4657 * Andreas Jaeger provided a test suite for the math library.
4659 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4661 * Ulrich Drepper added character set conversion functions (iconv).
4663 * Optimized string functions have been added.
4665 * The localedata addon is now part of glibc.
4667 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4669 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4670 daemon for NSS (nscd).
4672 Missing a better place here are some numbers on improvements. Under
4673 Linux 2.1.125 un-tar-ing the kernel sources takes
4677 using local files 12.19s 6.88s 22.91s
4679 using NIS 13.92s 8.91s 26.34s
4681 using NIS & nscd 10.37s 7.34s 25.30s
4683 using NIS+ 27.57s 30.37s 640.46s
4685 using NIS+ & nscd 10.25s 7.83s 26.51s
4687 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4689 Keep in mind that non-namelookup related operations dominate above times.
4690 It was just a common complain that using NIS+ unpacking the kernel is
4693 [1] The old nscd implementation is not available anymore since it was
4694 distributed with glibc up to version 2.0.98 and thus is now replaced.
4696 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4698 * Mark Kettenis provided a Hesiod NSS module.
4700 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4701 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4703 * rcmd can now handle netgroups (Dick Streefland).
4705 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4708 * Support for the IPv6 protocol has been added to the socket API, as per the
4709 latest draft standards.
4711 * Support for Linux 2.2 has been added.
4713 * Interface changes relative to the latest 2.0.x release:
4714 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4715 addseverity NEW: Unix98
4716 alphasort64 NEW: LFS
4717 argp_err_exit_status NEW: argp, GNU ext
4718 argp_error NEW: argp, GNU ext
4719 argp_failure NEW: argp, GNU ext
4720 argp_help NEW: argp, GNU ext
4721 argp_parse NEW: argp, GNU ext
4722 argp_program_bug_address NEW: argp, GNU ext
4723 argp_program_version NEW: argp, GNU ext
4724 argp_program_version_hook NEW: argp, GNU ext
4725 argp_state_help NEW: argp, GNU ext
4726 argp_usage NEW: argp, GNU ext
4727 authdes_create NEW: Secure RPC
4728 authdes_getucred NEW: Secure RPC
4729 authdes_pk_create NEW: Secure RPC
4730 backtrace NEW: GNU ext.
4731 backtrace_symbols NEW: GNU ext.
4732 backtrace_symbols_fd NEW: GNU ext.
4734 cacosf NEW: ISO C 9x
4735 cacosh NEW: ISO C 9x
4736 cacoshf NEW: ISO C 9x
4737 cacoshl NEW: ISO C 9x
4738 cacosl NEW: ISO C 9x
4745 casinf NEW: ISO C 9x
4746 casinh NEW: ISO C 9x
4747 casinhf NEW: ISO C 9x
4748 casinhl NEW: ISO C 9x
4749 casinl NEW: ISO C 9x
4751 catanf NEW: ISO C 9x
4752 catanh NEW: ISO C 9x
4753 catanhf NEW: ISO C 9x
4754 catanhl NEW: ISO C 9x
4755 catanl NEW: ISO C 9x
4756 cbc_crypt NEW: Secure RPC
4760 ccoshf NEW: ISO C 9x
4761 ccoshl NEW: ISO C 9x
4767 cimagf NEW: ISO C 9x
4768 cimagl NEW: ISO C 9x
4769 clearerr_locked REMOVED
4770 clntunix_create NEW: sunrpc ext
4772 clog10 NEW: ISO C 9x
4773 clog10f NEW: ISO C 9x
4774 clog10l NEW: ISO C 9x
4784 cprojf NEW: ISO C 9x
4785 cprojl NEW: ISO C 9x
4787 crealf NEW: ISO C 9x
4788 creall NEW: ISO C 9x
4793 csinhf NEW: ISO C 9x
4794 csinhl NEW: ISO C 9x
4797 csqrtf NEW: ISO C 9x
4798 csqrtl NEW: ISO C 9x
4802 ctanhf NEW: ISO C 9x
4803 ctanhl NEW: ISO C 9x
4805 des_setparity NEW: Secure RPC
4806 ecb_crypt NEW: Secure RPC
4807 endutxent NEW: Unix98
4809 exp10f NEW: ISO C 9x
4810 exp10l NEW: ISO C 9x
4814 fattach NEW: STREAMS
4815 fdetach NEW: STREAMS
4819 feclearexcept NEW: ISO C 9x
4820 fegetenv NEW: ISO C 9x
4821 fegetexceptflag NEW: ISO C 9x
4822 fegetround NEW: ISO C 9x
4823 feholdexcept NEW: ISO C 9x
4825 feraiseexcept NEW: ISO C 9x
4826 ferror_locked REMOVED
4827 fesetenv NEW: ISO C 9x
4828 fesetexceptflag NEW: ISO C 9x
4829 fesetround NEW: ISO C 9x
4830 fetestexcept NEW: ISO C 9x
4831 feupdateenv NEW: ISO C 9x
4832 fflush_locked REMOVED
4836 fgets_unlocked NEW: GNU ext.
4837 fileno_locked REMOVED
4849 fputc_locked REMOVED
4850 fputs_unlocked NEW: GNU ext.
4851 fread_unlocked NEW: GNU ext.
4856 fstatvfs NEW: Unix98
4860 ftruncate64 NEW: LFS
4862 fwrite_unlocked NEW: GNU ext.
4863 gai_strerror NEW: IPv6
4867 getchar_locked REMOVED
4869 getdate_err NEW: Unix98
4870 getdate_r NEW: GNU ext.
4872 getnameinfo NEW: IPv6
4873 getnetname NEW: Secure RPC
4874 getpmsg NEW: STREAMS
4875 getpt NEW: Unix98 PTY
4876 getrlimit64 NEW: LFS
4877 getutxent NEW: Unix98
4878 getutxid NEW: Unix98
4879 getutxline NEW: Unix98
4880 glob64 NEW: GNU ext.
4881 globfree64 NEW: GNU ext.
4882 gnu_get_libc_release NEW: GNU ext.
4883 gnu_get_libc_version NEW: GNU ext.
4884 grantpt NEW: Unix98 PTY
4885 host2netname NEW: Secure RPC
4887 iconv_close NEW: iconv
4888 iconv_open NEW: iconv
4889 if_freenameindex NEW: IPv6
4890 if_indextoname NEW: IPv6
4891 if_nameindex NEW: IPv6
4892 if_nametoindex NEW: IPv6
4893 in6addr_any NEW: IPv6
4894 in6addr_loopback NEW: IPv6
4895 inet6_isipv4mapped NEW: IPv6
4896 isastream NEW: STREAMS
4897 iswblank NEW: GNU ext.
4898 key_decryptsession NEW: Secure RPC
4899 key_decryptsession_pk NEW: Secure RPC
4900 key_encryptsession NEW: Secure RPC
4901 key_encryptsession_pk NEW: Secure RPC
4902 key_gendes NEW: Secure RPC
4903 key_get_conv NEW: Secure RPC
4904 key_secretkey_is_set NEW: Secure RPC
4905 key_setnet NEW: Secure RPC
4906 key_setsecret NEW: Secure RPC
4907 llrint NEW: ISO C 9x
4908 llrintf NEW: ISO C 9x
4909 llrintl NEW: ISO C 9x
4910 llround NEW: ISO C 9x
4911 llroundf NEW: ISO C 9x
4912 llroundl NEW: ISO C 9x
4917 lrintf NEW: ISO C 9x
4918 lrintl NEW: ISO C 9x
4919 lround NEW: ISO C 9x
4920 lroundf NEW: ISO C 9x
4921 lroundl NEW: ISO C 9x
4923 makecontext NEW: Unix98
4924 mempcpy NEW: GNU ext.
4927 modify_ldt NEW: kernel
4931 nearbyint NEW: ISO C 9x
4932 nearbyintf NEW: ISO C 9x
4933 nearbyintl NEW: ISO C 9x
4934 netname2host NEW: Secure RPC
4935 netname2user NEW: Secure RPC
4936 nexttoward NEW: ISO C 9x
4937 nexttowardf NEW: ISO C 9x
4938 nexttowardl NEW: ISO C 9x
4942 passwd2des NEW: Secure RPC
4944 pow10f NEW: GNU ext.
4945 pow10l NEW: GNU ext.
4948 printf_size NEW: GNU ext.
4949 printf_size_info NEW: GNU ext.
4950 profil_counter REMOVED
4951 pthread_mutexattr_getkind_np REPLACED
4952 pthread_mutexattr_setkind_np REPLACED
4953 ptsname NEW: Unix98 PTY
4954 ptsname_r NEW: Unix98 PTY
4956 putchar_locked REMOVED
4957 putgrent NEW: GNU ext.
4959 putpmsg NEW: STREAMS
4960 pututxline NEW: Unix98
4964 readdir64_r NEW: LFS
4965 remquo NEW: ISO C 9x
4966 remquof NEW: ISO C 9x
4967 remquol NEW: ISO C 9x
4969 roundf NEW: ISO C 9x
4970 roundl NEW: ISO C 9x
4972 scalbln NEW: ISO C 9x
4973 scalblnf NEW: ISO C 9x
4974 scalblnl NEW: ISO C 9x
4976 sendfile NEW: kernel
4977 setcontext NEW: Unix98
4978 setrlimit64 NEW: LFS
4979 setutxent NEW: Unix98
4981 sigignore NEW: Unix98
4982 sigqueue NEW: POSIX.1b
4983 sigrelse NEW: Unix98
4984 sigset NEW: POSIX.1b
4985 sigtimedwait NEW: POSIX.1b
4986 sigwaitinfo NEW: POSIX.1b
4987 sincos NEW: GNU ext.
4988 sincosf NEW: GNU ext.
4989 sincosl NEW: GNU ext.
4993 strcasestr NEW: GNU ext.
4994 strtoimax NEW: ISO C 9x
4995 strtoumax NEW: ISO C 9x
4996 strverscmp NEW: GNU ext.
4997 svcauthdes_stats NEW: Secure RPC
4998 svcunix_create NEW: sunrpc etx
4999 svcunixfd_create NEW: sunrpc ext
5000 swapcontext NEW: Unix98
5001 tcgetsid NEW: Unix98 PTY
5002 tdestroy NEW: GNU ext.
5003 tgamma NEW: ISO C 9x
5004 tgammaf NEW: ISO C 9x
5005 tgammal NEW: ISO C 9x
5009 truncf NEW: ISO C 9x
5010 truncl NEW: ISO C 9x
5012 unlockpt NEW: Unix98 PTY
5013 updwtmpx NEW: Unix98
5014 user2netname NEW: Secure RPC
5015 utmpxname NEW: Unix98
5016 versionsort NEW: GNU ext.
5017 versionsort64 NEW: GNU ext.
5019 wcscasecmp NEW: GNU ext.
5020 wcsncasecmp NEW: GNU ext.
5021 wcsnlen NEW: GNU ext.
5022 wcstoimax NEW: ISO C 9x
5023 wcstoll NEW: ISO C 9x
5024 wcstoull NEW: ISO C 9x
5025 wcstoumax NEW: ISO C 9x
5027 wordexp NEW: POSIX.2
5028 wordfree NEW: POSIX.2
5029 write_profiling REMOVED
5030 xdecrypt NEW: Secure RPC
5031 xdr_authdes_cred NEW: Secure RPC
5032 xdr_authdes_verf NEW: Secure RPC
5033 xdr_cryptkeyarg NEW: Secure RPC
5034 xdr_cryptkeyarg2 NEW: Secure RPC
5035 xdr_cryptkeyres NEW: Secure RPC
5036 xdr_getcredres NEW: Secure RPC
5037 xdr_key_netstarg NEW: Secure RPC
5038 xdr_key_netstres NEW: Secure RPC
5039 xdr_keybuf NEW: Secure RPC
5040 xdr_keystatus NEW: Secure RPC
5041 xdr_netnamestr NEW: Secure RPC
5042 xdr_sizeof NEW: Secure RPC
5043 xdr_unixcred NEW: sunrpc ext
5044 xencrypt NEW: Secure RPC
5045 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5056 * inet_ntoa is thread-safe
5058 * updwtmp is moved from libutil to libc
5060 * rewrite of cbrt function
5062 * update of timezone data
5076 * add atoll function
5078 * fix complex problems in Berkeley DB code
5080 * fix math functions
5084 * fixed lots of header problems (especially Linux/GNU specific)
5086 * dynamic loader preserves all registers
5088 * Roland McGrath provided support for handling of auxiliary objects in
5089 the ELF dynamic loader.
5091 * support for parallel builds is improved
5095 * GNU extensions are no longer declared by default. To enable them you
5096 must define the macro `_GNU_SOURCE' in your program or compile with
5099 * The library has changed from using GNU ld symbol aliases to using weak
5100 symbols where available. The ELF object file format supports weak
5101 symbols; GNU ld also supports weak symbols in the a.out format. (There
5102 is also now support for other GNU ld extensions in ELF. Use the
5103 `--with-elf' option to configure to indicate you have ELF, and
5104 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5105 of many files which contained only symbol aliases, reducing the size of
5106 the source and the compiled library; many other files were renamed to
5107 less cryptic names previously occupied by the symbol alias files.
5108 There is a new header file <elf.h> for programs which operate on
5109 files in the ELF format.
5111 * Converted to Autoconf version 2, so `configure' has more options.
5112 Run `configure --help' to see the details.
5114 * The library can now be configured to build profiling, highly-optimized
5115 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5116 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5117 `configure' enable building these extra libraries. The shared library is
5118 built by default when using both ELF and GNU ld. When shared libraries
5119 are enabled, the new library `-ldl' is available for arbitrary run-time
5120 loading of shared objects; its interface is defined in <dlfcn.h>. The
5121 new header file <link.h> gives access to the internals of the run-time
5122 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5123 application of same name on other systems and it provides information
5124 about dynamically linked binaries.
5126 * The C library now provides the run-time support code for profiling
5127 executables compiled with `-pg'. Programs can control the profiling code
5128 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5129 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5130 the support for this file format was contributed by David Mosberger-Tang.
5132 * The math code has been replaced with a math library based on fdlibm from
5133 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5134 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5135 functions. The math functions now reside in a separate library, so
5136 programs using them will need to use `-lm' their linking commands.
5138 * John C. Bowman contributed optimized ix87 assembler inline functions.
5140 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5141 mechanism similar to that found in Solaris 2. This is now used for the
5142 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5143 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5144 file controls what services are used for each individual database. This
5145 works by loading shared libraries with names specified in `nsswitch.conf',
5146 so service modules can be changed or added at any time without even
5147 relinking any program. Currently there are the file, db, and NIS based
5148 NSS services available.
5150 * The new functions `strtoq' and `strtouq' parse integer values from
5151 strings, like `strtol' and `strtoul', but they return `long long int' and
5152 `unsigned long long int' values, respectively (64-bit quantities).
5154 * The new functions `strtof' and `strtold' parse floating-point values from
5155 strings, like `strtod', but they return `float' and `long double' values,
5156 respectively (on some machines `double' and `long double' are the same).
5158 * Ulrich Drepper has contributed new implementations of the floating-point
5159 printing and reading code used in the `printf' family of functions and
5160 `strtod', `strtof', and `strtold'. These new functions are perfectly
5161 accurate, and much faster than the old ones.
5163 * The implementation of the POSIX locale model was completely rewritten by
5164 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5165 to compile the POSIX locale definition.
5167 * The former dummy implementations of the strcoll and strxfrm function are
5168 now replaced by fully functional code contributed by Ulrich Drepper. The
5169 collation information comes from the POSIX locale definitions.
5171 * The new header <langinfo.h> defines an interface for accessing
5172 various locale-dependent data (using the locale chosen with `setlocale').
5174 * Ulrich Drepper has contributed a new suite of functions for operation on
5175 wide-character and multibyte-character strings, in <wchar.h>;
5176 and classification and case conversion of wide characters, in <wctype.h>.
5177 These new functions are conforming to the ISO C, Amendement 1 specification.
5179 * There is now a second implementation of the standard I/O library available.
5180 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5181 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5183 * You can now use positional parameter specifications in format strings
5184 for the `printf' and `scanf' families of functions. For example,
5185 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5186 ``Number 6, Mr Jones''. This is mainly useful when providing different
5187 format strings for different languages, whose grammars may dictate
5188 different orderings of the values being printed. To support this
5189 feature, the interface for `register_printf_handler' has changed; see
5190 the header file <printf.h> for details.
5192 * The `printf' and `scanf' families of functions now understand a new
5193 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5194 to group numbers as indicated by the locale; for `scanf' and friends, this
5195 says to accept as valid only a number with all the proper grouping
5196 separators in the right places. In the default "C" locale, numbers are
5197 not grouped; but locales for specific countries will define the usual
5198 conventions (i.e. separate thousands with `,' in the US locale).
5200 * The pgrp functions have been regularized, slightly incompatibly but much
5201 less confusingly. The core functions are now `getpgid' and `setpgid',
5202 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5203 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5204 provided for compatibility. There is no longer an incompatible `getpgrp'
5205 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5207 * The new header file <fts.h> and suite of functions simplify programs that
5208 operate on directory trees. This code comes from 4.4 BSD.
5210 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5211 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5212 NSS scheme used in glibc.
5214 * There is a new malloc debugging hook `__memalign_hook'.
5216 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5217 `unsigned int' in <sys/types.h>. These are for compatibility only and
5218 their use is discouraged.
5220 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5221 done differently, so that it works even without GNU ld.
5223 * New function `euidaccess' checks allowed access to a file like `access',
5224 but using the effective IDs instead of the real IDs.
5226 * The time zone data files have been updated for the latest and greatest
5227 local time conventions of the countries of the world.
5229 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5232 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5233 for formatting floating-point numbers. They are provided only for
5234 compatibility; new programs should use `sprintf' instead. There are
5235 also equivalent function for the `long double' floating-point type and
5236 all functions also exist in a reentrant form.
5238 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5239 functions for maintaining the login-record files (primarily of use to
5240 system programs such as `login'), and convenient functions for
5241 allocating and initializing a pseudo-terminal (pty) device.
5243 * Ulrich Drepper has contributed new support for System V style
5244 shared memory and IPC on systems that support it.
5246 * Ulrich Drepper has contributed several miscellaneous new functions found
5247 in System V: The `hsearch' family of functions provide an effective
5248 implementation of hash tables; `a64l' and `l64a' provide a very simple
5249 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5252 * Ulrich Drepper has contributed new reentrant counterparts for the
5253 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5255 * Ulrich Drepper has contributed new, highly-optimized versions of several
5256 string functions for the i486/Pentium family of processors.
5258 * Ulrich Drepper has updated the Linux-specific code, based largely
5259 on work done in Hongjiu Lu's version of GNU libc for Linux.
5260 The GNU library now supports Linux versions 2.0.10 and later,
5261 using the ELF object file format (i[3456]86-*-linux).
5263 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5265 * David Mosberger-Tang and Richard Henderson have ported the C library
5266 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5267 dynamic linking support for ELF/Alpha.
5269 * Richard Henderson contributed several Alpha optimized assembler function
5270 for arithmetic and string handling.
5272 * Ulrich Drepper has contributed a new set of message catalog functions to
5273 support multiple languages using the <libintl.h> interface, for use with
5274 his new package GNU gettext. Translation volunteers have contributed
5275 catalogs of the library's messages in Spanish, German, and Korean.
5277 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5278 program and the `catgets' function for reading the catalog files it
5279 creates. (The <libintl.h> interface is preferred; we include the
5280 <nl_types.h> interface using `catgets' only for source compatibility with
5281 programs already written to use it.)
5283 * New header file <values.h> gives SVID-compatible names for <limits.h>
5286 * Various new macros, declarations, and small header files for compatibility
5289 * New function `group_member' is a convenient way to check if a process has
5290 a given effective group ID.
5292 * When using GCC 2.7 and later, the socket functions are now declared in a
5293 special way so that passing an argument of type `struct sockaddr_in *',
5294 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5295 `struct sockaddr *' type, does not generate a type-clash warning.
5297 * New function `error' declared in header file <error.h> is a convenient
5298 function for printing error messages and optionally exiting; this is the
5299 canonical function used in GNU programs. The new functions `err', `warn',
5300 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5301 doing the same thing.
5303 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5304 POSIX.2 `glob' function to do ~ and {...} expansion.
5306 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5307 `clearenv' which is used in POSIX.9 is also available.
5309 * New function `getsid' returns session ID number on systems that support it.
5311 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5312 files <db.h> and <mpool.h> provide a rich set of functions for several
5313 types of simple databases stored in memory and in files, and <ndbm.h> is
5314 an old `ndbm'-compatible interface using the `db' functions. Link with
5315 `-ldb' to get these functions.
5317 * New macro `strdupa' copies a string like `strdup', but uses local stack
5318 space from `alloca' instead of dynamic heap space from `malloc'.
5320 * New function `strnlen' is like `strlen' but searches only a given maximum
5321 number of characters for the null terminator. `stpncpy', `strndup' and
5322 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5325 * New function `statfs' in header <sys/statfs.h>.
5327 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5328 provide convenient functions for operating on blocks of null-terminated
5331 * A new suite of functions in <utmp.h> handle all the details of reading
5332 and writing the utmp file.
5334 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5337 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5338 completely POSIX compliant and also implemented the extended functionality
5339 to handle alternate digit representation and alternate era date formats.
5341 * Ulrich Drepper provided an implementation of the `strptime' function
5342 defined in XPG4.2 which transforms a string into a `struct tm' value.
5344 * Paul Eggert provided the tzselect shell script as part of the timezone
5345 code. The shell script makes it easy to select the correct timezone
5348 * The implementation of the malloc family of functions is completely replaced
5349 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5350 The implementation uses the mmap function (if available) and it is
5351 optimized for the use in multi threaded programs.
5353 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5354 functions. This new functionality is usable by specifying a special
5355 salt string and it is compatible with implementation on *BSD systems.
5357 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5358 `getsubopt' to handle second level command line options, `bsd_signal'
5359 to access BSD style `signal' functionality, the obsolete `regexp' style
5362 * the `lchown' function is available on system which support this
5365 * The implementation of the shadow password handling function was contributed
5368 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5370 * POSIX.1g support was added. The <sys/select.h> header is available,
5371 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5372 implementation of `getaddrinfo'.
5376 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5378 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5379 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5381 * The new function `daemon' from 4.4 BSD is useful for server programs that
5382 want to put themselves in the background.
5384 * Joel Sherrill has contributed support for several standalone boards that
5385 run without an operating system.
5387 * `printf', `scanf' and friends now accept a `q' type modifier for long
5388 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5390 * All of the code taken from BSD (notably most of the math and networking
5391 routines) has been updated from the BSD 4.4-Lite release.
5393 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5395 * The new functions `getdomainname' and `setdomainname' fetch or change the
5396 YP/NIS domain name. These are system calls which exist on systems which
5399 * The time zone data files have been updated for the latest international
5402 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5403 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5407 * The C library now includes support for Sun RPC, from Sun's free
5408 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5409 are included. (There is still no support for YP.)
5411 * Tom Quinn has contributed a port of the C library to SGI machines running
5412 Irix 4 (mips-sgi-irix4).
5414 * The new `lockf' function is a simplified interface to the locking
5415 facilities of `fcntl', included for compatibility.
5417 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5419 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5421 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5424 * The error message printed by `assert' for a failed assertion now includes
5425 the name of the program (if using GNU ld) and the name of the calling
5426 function (with versions of GCC that support this).
5428 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5430 * The library now includes the <sys/mman.h> header file and memory
5431 management functions `mmap', `munmap', `mprotect', `msync', and
5432 `madvise', on systems that support those facilities.
5434 * The interface for `mcheck' has changed slightly: the function called to
5435 abort the program when an allocation inconsistency is detected now takes
5436 an argument that indicates the type of failure. The new function
5437 `mprobe' lets you request a consistency check for a particular block at
5438 any time (checks are normally done only when you call `free' or `realloc'
5441 * It is now possible to easily cross-compile the C library, building on one
5442 system a library to run on another machine and/or operating system. All
5443 you need to do is set the variable `HOST_CC' in `configparms' to the
5444 native compiler for programs to run on the machine you are building on (a
5445 few generator programs are used on Unix systems); set `CC' to the
5448 * The new function `fexecve' (only implemented on the GNU system) executes
5449 a program file given a file descriptor already open on the file.
5453 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5454 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5456 * You can set the variable `libprefix' in `configparms' to specify a prefix
5457 to be prepended to installed library files; this makes it easy to install
5458 the GNU C library to be linked as `-lgnuc' or whatever.
5460 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5461 copies a limited number of characters from a string, and returns the
5462 address of the last character written.
5464 * You no longer need to check for whether the installed `stddef.h' is
5465 compatible with the GNU C library. configure now checks for you.
5467 * You can now define a per-stream `fileno' function to convert the
5468 stream's cookie into an integral file descriptor.
5470 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5471 allocates zero bytes of storage, and returns a unique pointer which
5472 you can pass to `realloc' or `free'. The behavior is undefined if
5473 you dereference this pointer.
5475 * The C library now runs on Sony NEWS m68k machines running either
5476 NewsOS 3 or NewsOS 4.
5478 * The new `syscall' function is a system-dependent primitive function
5479 for invoking system calls. It has the canonical behavior on Unix
5480 systems, including unreliable return values for some calls (such as
5481 `pipe', `fork' and `getppid').
5483 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5484 to `EAGAIN', which is the preferred name. On systems whose kernels
5485 use two distinct codes, the C library now translates EWOULDBLOCK to
5486 EAGAIN in every system call function.
5490 * The GNU C Library Reference Manual is now distributed with the library.
5491 `make dvi' will produce a DVI file of the printed manual.
5492 `make info' will produce Info files that you can read on line using C-h i
5493 in Emacs or the `info' program.
5494 Please send comments on the manual to bug-glibc-manual@gnu.org.
5496 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5498 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5500 * Jason Merrill has contributed a port to the Sequent Symmetry running
5501 Dynix version 3 (i386-sequent-dynix).
5503 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5504 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5506 * New function `memory_warnings' lets you arrange to get warnings when
5507 malloc is running out of memory to allocate, like Emacs gives you.
5509 * The C library now contains the relocating allocator used in Emacs 19 for
5510 its editing buffers. This allocator (ralloc) minimizes allocation
5511 overhead and fragmentation by moving allocated regions around whenever it
5512 needs to. You always refer to a ralloc'd region with a "handle" (a
5513 pointer to a pointer--an object of type `void **').
5515 * There is a new `printf' format: `%m' gives you the string corresponding
5516 to the error code in `errno'.
5518 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5519 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5520 pass, the `a' modifier says to fill in a `char **' you pass with a
5523 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5524 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5525 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5527 * `mkstemp' is a traditional Unix function to atomically create and open a
5528 uniquely-named temporary file.
5532 * The standard location for the file that says what the local timezone is
5533 has changed again. It is now `/usr/local/etc/localtime' (or more
5534 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5536 * The distribution no longer contains any files with names longer than 14
5539 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5540 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5542 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5546 * The configuration process has changed quite a bit. The `configure'
5547 script is now used just like the configuration scripts for other GNU
5548 packages. The `sysdeps' directory hierarchy is much rearranged.
5549 The file `INSTALL' explains the new scheme in detail.
5551 * The header files no longer need to be processed into ANSI C and
5552 traditional C versions. There is just one set of files to install, and
5553 it will work with ANSI or old C compilers (including `gcc -traditional').
5555 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5556 MIPS DECStation running Ultrix 4.
5558 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5559 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5560 made itself into a shared library.
5562 * Yet further improved support for the i386, running 4.3 BSD-like systems
5563 (such as Mach 3 with the Unix single-server), or System V.
5565 * New function `strncasecmp' to do case-insensitive string comparison
5566 with limited length.
5568 * New function `strsep' is a reentrant alternative to `strtok'.
5570 * New functions `scandir' and `alphasort' for searching directories.
5572 * New function `setenv' is a better interface to `putenv'.
5574 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5575 function for traversing a directory tree.
5577 * The GNU obstack package is now also part of the C library.
5578 The new function `open_obstack_stream' creates a stdio stream that
5579 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5580 formatted output directly to an obstack.
5582 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5583 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5585 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5587 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5588 things to your strings.
5590 * There are some new test programs: test-fseek, testmb, and testrand.
5592 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5593 These ports are not finished, but are a good starting place for really
5594 supporting those systems.
5596 * `/etc/localtime' is now the standard location for the file that says what
5597 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5598 This follows the general principle that `/etc' is the place for all local
5599 configuration files.
5601 * The C library header files now use `extern "C"' when used by the C++
5602 compiler, so the C library should now work with C++ code.
5604 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5605 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5608 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5609 function which uses the `merge sort' algorithm, and is said to be
5610 significantly faster than the old GNU `qsort' function. Merge sort is
5611 now the standard `qsort' function. The new algorithm can require a lot
5612 of temporary storage; so, the old sorting function is called when the
5613 required storage is not available.
5615 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5616 provides the Unix `crypt' function, plus some other entry points.
5618 * The code and header files taken from 4.4 BSD have been updated with the
5619 latest files released from Berkeley.
5621 ----------------------------------------------------------------------
5622 Copyright information:
5624 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5626 Permission is granted to anyone to make or distribute verbatim copies
5627 of this document as received, in any medium, provided that the
5628 copyright notice and this permission notice are preserved,
5629 thus giving the recipient permission to redistribute in turn.
5631 Permission is granted to distribute modified versions
5632 of this document, or of portions of it,
5633 under the above conditions, provided also that they
5634 carry prominent notices stating who last changed them.
5637 version-control: never