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 [The release manager will add the list generated by
122 scripts/list-fixed-bugs.py just before the release.]
129 * The getcpu wrapper function has been added, which returns the currently
130 used CPU and NUMA node. This function is Linux-specific.
132 * A new convenience target has been added for distribution maintainers
133 to build and install all locales as directories with files. The new
134 target is run by issuing the following command in your build tree:
135 'make localedata/install-locale-files', with an optional DESTDIR
136 to set the install root if you wish to install into a non-default
139 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
141 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
142 for _GNU_SOURCE, to match BSD environments.
144 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
145 indicates that it will abort the transaction prior to entering the kernel
146 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
147 suspended, and this caused some undefined side-effects issues by aborting
148 transactions manually. Glibc avoided it by abort transactions manually on
149 each syscall, but it lead to performance issues on newer kernels where the
150 HTM state is saved and restore lazily (the state being saved even when the
151 process actually does not use HTM).
153 * The functions posix_spawn_file_actions_addchdir_np and
154 posix_spawn_file_actions_addfchdir_np have been added, enabling
155 posix_spawn and posix_spawnp to run the new process in a different
156 directory. These functions are GNU extensions. The function
157 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
160 * The popen and system do not run atfork handlers anymore (BZ#17490).
161 Although it is a possible POSIX violation, the POSIX rationale in
162 pthread_atfork documentation regarding atfork handlers is to handle
163 inconsistent mutex state after a fork call in a multi-threaded process.
164 In both popen and system there is no direct access to user-defined mutexes.
166 * Support for the C-SKY ABIV2 running on Linux has been added. This port
167 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
169 - C-SKY ABIV2 soft-float little-endian
170 - C-SKY ABIV2 hard-float little-endian
172 * strftime's default formatting of a locale's alternative year (%Ey)
173 has been changed to zero-pad the year to a minimum of two digits,
174 like "%y". This improves the display of Japanese era years during
175 the first nine years of a new era, and is expected to be harmless
176 for all other locales (only Japanese locales regularly have
177 alternative year numbers less than 10). Zero-padding can be
178 overridden with the '_' or '-' flags (which are GNU extensions).
180 * As a GNU extension, the '_' and '-' flags can now be applied to
181 "%EY" to control how the year number is formatted; they have the
182 same effect that they would on "%Ey".
184 Deprecated and removed features, and other changes affecting compatibility:
186 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
187 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
189 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
190 in <sys/procfs.h>, has been corrected to match the type actually used by
191 the Linux kernel. This affects the size and layout of that structure on
192 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
194 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
195 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
196 defined in <sys/procfs.h>, has been corrected to match the type actually
197 used by the Linux kernel. This affects the size and layout of those
200 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
201 meant to scan a string and allocate space for it with malloc, is now
202 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
203 defined. This extension conflicts with C99's use of '%a' to scan a
204 hexadecimal floating-point number, which is now available to programs
205 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
207 POSIX.1-2008 includes the feature of allocating a buffer for string input
208 with malloc, using the modifier letter 'm' instead. Programs using
209 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
210 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
211 C99 '%a' no longer need to avoid _GNU_SOURCE.
213 GCC's -Wformat warnings can detect most uses of this extension, as long
214 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
215 __attribute__ ((format (scanf, ...))).
217 Changes to build and runtime requirements:
219 * Python 3.4 or later is required to build the GNU C Library.
221 * On most architectures, GCC 5 or later is required to build the GNU C
222 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
224 Older GCC versions and non-GNU compilers are still supported when
225 compiling programs that use the GNU C Library.
227 Security related changes:
229 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
230 denial of service due to resource exhaustion when processing getaddrinfo
231 calls with crafted host names. Reported by Guido Vranken.
233 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
234 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
235 happened, accessing the 32-bit size_t value as the full 64-bit register
236 in the assembly string/memory functions would cause a buffer overflow.
239 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
240 addresses with arbitrary trailing characters, potentially leading to data
241 or command injection issues in applications.
243 The following bugs are resolved with this release:
245 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
246 [10496] localedata: 12h time representation in multiple locales faulty
247 [10797] localedata: it_IT locale numeric does not have a separator for
249 [11319] libc: dprintf doesn't handle errors properly
250 [16346] time: mktime: potentially unsafe use of localtime_offset
251 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
253 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
254 posix_spawn_file_actions_addfchdir_np
255 [17426] localedata: Indian locales: set the correct date format
256 [17490] stdio: popen should not invoke atfork handlers
257 [17783] libc: TIOCSER_TEMT conditions inconsistent
258 [18040] regex: use-after-free in regexec/get_subexp
259 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
260 [20018] network: getaddrinfo should reject IP addresses with trailing
261 characters (CVE-2016-10739)
262 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
263 [20271] libc: Missing "\n" in __libc_fatal calls
264 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
265 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
266 pointer argument is non-NULL
267 [21037] stdio: open_memstream and freopen
268 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
269 [21716] time: Crash in glibc's mktime in low-memory situations
270 [22834] stdio: Subprocess forked by popen may crash in Linux when
271 multithreads call popen
272 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
273 and pthread_create fails.
274 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
275 [23125] libc: riscv64: endless loop when throwing an exception from a
277 [23275] nptl: Race in pthread_mutex_lock while promoting to
278 PTHREAD_MUTEX_ELISION_NP.
279 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
281 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
283 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
285 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
286 [23509] dynamic-link: CET enabled glibc is incompatible with the older
288 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
289 [23521] nss: get_next_alias nss_files file stream leak
290 [23538] nptl: Hang in pthread_cond_broadcast
291 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
292 [23578] regex: Invalid memory access if regex pattern contains NUL byte
293 [23579] libc: Errors misreported in preadv2
294 [23597] build: support/test-container.c doesn't work with different
296 [23603] time: mktime signed integer overflow on large timestamps
297 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
298 [23614] libc: powerpc: missing CFI register information in __mpn_*
300 [23637] string: Generic strstr/strcasestr fails with huge needles
301 [23640] libc: no way to easily clear FD_CLOEXEC in
302 posix_spawn_file_actions_adddup2()
303 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
305 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
307 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
308 [23689] libc: Bug in documentation for rusage.ru_ixrss in
309 bits/types/struct_rusage.h
310 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
312 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
314 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
315 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
316 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
318 [23724] localedata: Albanian date formats are incorrect
319 [23735] math: libnldbl_nonshared.a references internal libm symbols
320 [23740] localedata: kl_GL: Month names and date formats need update
321 [23744] regex: regex refactorings to remove BE, avoid duplication
322 [23745] time: mktime fix for Gnulib + coreutils
323 [23758] time: Improve the width of alternate representation for year in
325 [23783] libc: [mips] Missing CMSPAR bits/termios.h
326 [23789] time: mktime does not set errno on failure
327 [23791] localedata: Wrong monetary format for ca_ES locale
328 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
329 [23794] locale: c16rtomb does not handle surrogate pairs
330 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
331 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
332 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
333 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
334 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
335 [23862] libc: [sh] missing kernel-features.h undefines
336 [23864] libc: [riscv] missing kernel-features.h undefines
337 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
338 [23907] malloc: Incorrect double-free malloc tcache check disregards
340 [23913] libc: off-by-one in function maybe_script_execute in
341 sysdeps/posix/spawni.c
342 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
343 [23923] locale: Add --no-hard-links option to localedef
344 [23927] network: Linux if_nametoindex() does not close descriptor
346 [23961] math: powf can overflow to inf without setting errno in non-
347 nearest rounding mode
348 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
349 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
350 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
351 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
352 [24011] localedata: Fixed small type in comment for locale bs_BA
353 [24018] libc: gettext() may return NULL
354 [24022] build: riscv build failure with Linux kernel 4.20-rc7
355 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
356 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
358 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
359 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
361 [24046] localedata: en_US locale doesn't define date_fmt
362 [24063] manual: @var{errno} should be @code{errno}
363 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
364 [24088] libc: VSCR field is not being correctly read in ucontext_t on
366 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
368 [24097] string: Can't use 64-bit register for size_t in assembly codes for
370 [24110] hurd: SS_DISABLE never set in stack_t value returned by
372 [24112] network: Do not send DNS queries for non-host names (where all
373 answers will be rejected)
374 [24130] libc: alpha __remqu corrupts $f3 register
381 * The localization data for ISO 14651 is updated to match the 2016
382 Edition 4 release of the standard, this matches data provided by
383 Unicode 9.0.0. This update introduces significant improvements to the
384 collation of Unicode characters. This release deviates slightly from
385 the standard in that the collation element ordering for lowercase and
386 uppercase LATIN script characters is adjusted to ensure that regular
387 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
388 is not matched by [a-z]. With the update many locales have been
389 updated to take advantage of the new collation information. The new
390 collation information has increased the size of the compiled locale
391 archive or binary locales.
393 * The GNU C Library can now be compiled with support for Intel CET, AKA
394 Intel Control-flow Enforcement Technology. When the library is built
395 with --enable-cet, the resulting glibc is protected with indirect
396 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
397 compatible with all existing executables and shared libraries. This
398 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
399 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
400 capable of multi-byte NOPs, like x86-64 processors as well as Intel
401 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
402 x86_64 and x32 on non-CET processors. --enable-cet has been tested
403 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
406 * The GNU C Library now has correct support for ABSOLUTE symbols
407 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
408 relocated incorrectly or in some cases discarded. The GNU linker can
409 make use of the newer semantics, but it must communicate it to the
410 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
411 field) to indicate such support is required.
413 * Unicode 11.0.0 Support: Character encoding, character type info, and
414 transliteration tables are all updated to Unicode 11.0.0, using
415 generator scripts contributed by Mike FABIAN (Red Hat).
417 * <math.h> functions that round their results to a narrower type are added
418 from TS 18661-1:2014 and TS 18661-3:2015:
420 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
423 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
426 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
429 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
432 * Two grammatical forms of month names are now supported for the following
433 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
434 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
435 support two grammatical forms in abbreviated month names: Catalan, Greek,
438 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
439 include the support for two grammatical forms of month names.
441 * Building and running on GNU/Hurd systems now works without out-of-tree
444 * The renameat2 function has been added, a variant of the renameat function
445 which has a flags argument. If the flags are zero, the renameat2 function
446 acts like renameat. If the flag is not zero and there is no kernel
447 support for renameat2, the function will fail with an errno value of
448 EINVAL. This is different from the existing gnulib function renameatu,
449 which performs a plain rename operation in case of a RENAME_NOREPLACE
450 flags and a non-existing destination (and therefore has a race condition
451 that can clobber the destination inadvertently).
453 * The statx function has been added, a variant of the fstatat64
454 function with an additional flags argument. If there is no direct
455 kernel support for statx, glibc provides basic stat support based on
456 the fstatat64 function.
458 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
459 library if installed. libidn2 version 2.0.5 or later is recommended. If
460 libidn2 is not available, internationalized domain names are not encoded
461 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
462 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
463 with an encoding error.) Flags which used to change the IDN encoding and
464 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
465 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
466 deprecated. They no longer have any effect.
468 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
469 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
470 range of ELF gABI expressions including such constructs as
471 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
472 have been further restricted, and where in the past a dynamic string
473 token sequence may have been interpreted as a literal string it will
474 now cause a load failure. These load failures were always considered
475 unspecified behaviour from the perspective of the dynamic loader, and
476 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
477 results in a load failure now.
479 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
480 implementation includes all the standard functions provided by
483 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
484 thrd_detach, thrd_exit, and thrd_join for thread management.
486 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
487 mtx_destroy for mutual exclusion.
489 - call_once for function call synchronization.
491 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
492 cnd_wait for conditional variables.
494 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
496 Application developers must link against libpthread to use ISO C threads.
498 Deprecated and removed features, and other changes affecting compatibility:
500 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
501 installed. Software that was using either header should be updated to
502 use standard <stdio.h> interfaces instead.
504 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
505 This was never required by the C standard, and the macros just expanded
506 to call alternative names for the same functions. If you hoped getc and
507 putc would provide performance improvements over fgetc and fputc, instead
508 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
509 necessary, flockfile and funlockfile.
511 * All stdio functions now treat end-of-file as a sticky condition. If you
512 read from a file until EOF, and then the file is enlarged by another
513 process, you must call clearerr or another function with the same effect
514 (e.g. fseek, rewind) before you can read the additional data. This
515 corrects a longstanding C99 conformance bug. It is most likely to affect
516 programs that use stdio to read interactive input from a terminal.
519 * The macros 'major', 'minor', and 'makedev' are now only available from
520 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
521 headers that happen to include <sys/types.h>. These macros are rarely
522 used, not part of POSIX nor XSI, and their names frequently collide with
523 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
526 <sys/sysmacros.h> is a GNU extension. Portable programs that require
527 these macros should first include <sys/types.h>, and then include
528 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
530 * The tilegx*-*-linux-gnu configurations are no longer supported.
532 * The obsolete function ustat is no longer available to newly linked
533 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
534 function has been deprecated in favor of fstatfs and statfs.
536 * The obsolete function nfsservctl is no longer available to newly linked
537 binaries. This function was specific to systems using the Linux kernel
538 and could not usefully be used with the GNU C Library on systems with
539 version 3.1 or later of the Linux kernel.
541 * The obsolete function name llseek is no longer available to newly linked
542 binaries. This function was specific to systems using the Linux kernel
543 and was not declared in a header. Programs should use the lseek64 name
544 for this function instead.
546 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
547 getaddrinfo and getnameinfo functions have been deprecated. The behavior
548 previously selected by them is now always enabled.
550 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
551 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
552 restriction (rejecting '_' in host names, among other things) has been
553 removed, for increased compatibility with non-IDN name resolution.
555 * The fcntl function now have a Long File Support variant named fcntl64. It
556 is added to fix some Linux Open File Description (OFD) locks usage on non
557 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
558 fcntl and LFS support is handled transparently. Also for Linux, the OFD
559 locks act as a cancellation entrypoint.
561 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
562 ecb_crypt, and des_setparity are no longer available to newly linked
563 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
564 longer installed. These functions encrypted and decrypted data with the
565 DES block cipher, which is no longer considered secure. Software that
566 still uses these functions should switch to a modern cryptography library,
569 * Reflecting the removal of the encrypt and setkey functions above, the
570 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
571 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
574 * The obsolete function fcrypt is no longer available to newly linked
575 binaries. It was just another name for the standard function crypt,
576 and it has not appeared in any header file in many years.
578 * We have tentative plans to hand off maintenance of the passphrase-hashing
579 library, libcrypt, to a separate development project that will, we hope,
580 keep up better with new passphrase-hashing algorithms. We will continue
581 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
582 'crypt_r' should not need to change at all; however, distributions will
583 need to install <crypt.h> and libcrypt from a separate project.
585 In this release, if the configure option --disable-crypt is used, glibc
586 will not install <crypt.h> or libcrypt, making room for the separate
587 project's versions of these files. The plan is to make this the default
588 behavior in a future release.
590 Changes to build and runtime requirements:
592 GNU make 4.0 or later is now required to build glibc.
594 Security related changes:
596 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
597 been fixed by removing the glibc-internal IDNA implementation and using
598 the system-provided libidn2 library instead. Originally reported by Hanno
599 Böck and Christian Weisgerber.
601 CVE-2017-18269: An SSE2-based memmove implementation for the i386
602 architecture could corrupt memory. Reported by Max Horn.
604 CVE-2018-11236: Very long pathname arguments to realpath function could
605 result in an integer overflow and buffer overflow. Reported by Alexey
608 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
609 architecture could write beyond the target buffer, resulting in a buffer
610 overflow. Reported by Andreas Schwab.
612 The following bugs are resolved with this release:
614 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
615 [6889] manual: 'PWD' mentioned but not specified
616 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
617 when __WORDSIZE != 64
618 [13762] regex: re_search etc. should return -2 on memory exhaustion
619 [13888] build: /tmp usage during testing
620 [13932] math: dbl-64 pow unexpectedly slow for some inputs
621 [14092] nptl: Support C11 threads
622 [14095] localedata: Review / update collation data from Unicode / ISO
624 [14508] libc: -Wformat warnings
625 [14553] libc: Namespace pollution loff_t in sys/types.h
626 [14890] libc: Make NT_PRFPREG canonical.
627 [15105] libc: Extra PLT references with -Os
628 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
630 [16335] manual: Feature test macro documentation incomplete and out of
632 [16552] libc: Unify umount implementations in terms of umount2
633 [17082] libc: htons et al.: statement-expressions prevent use on global
634 scope with -O1 and higher
635 [17343] libc: Signed integer overflow in /stdlib/random_r.c
636 [17438] localedata: pt_BR: wrong d_fmt delimiter
637 [17662] libc: please implement binding for the new renameat2 syscall
638 [17721] libc: __restrict defined as /* Ignore */ even in c11
639 [17979] libc: inconsistency between uchar.h and stdint.h
640 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
641 [18023] libc: extend_alloca is broken (questionable pointer comparison,
642 horrible machine code)
643 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
645 [18471] libc: llseek should be a compat symbol
646 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
648 [18991] nss: nss_files skips large entry in database
649 [19239] libc: Including stdlib.h ends up with macros major and minor being
651 [19463] libc: linknamespace failures when compiled with -Os
652 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
653 [19527] locale: Normalized charset name not recognized by setlocale
654 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
655 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
657 [19728] network: out of bounds stack read in libidn function
658 idna_to_ascii_4i (CVE-2016-6261)
659 [19729] network: out of bounds heap read on invalid utf-8 inputs in
660 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
661 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
663 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
664 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
665 [20419] dynamic-link: files with large allocated notes crash in
667 [20530] libc: bswap_16 should use __builtin_bswap16() when available
668 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
669 [20980] manual: CFLAGS environment variable replaces vital options
670 [21163] regex: Assertion failure in pop_fail_stack when executing a
671 malformed regexp (CVE-2015-8985)
672 [21234] manual: use of CFLAGS makes glibc detect no optimization
673 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
674 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
675 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
676 [21508] locale: intl/tst-gettext failure with latest msgfmt
677 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
678 [21812] network: getifaddrs() returns entries with ifa_name == NULL
679 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
681 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
683 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
684 [22247] network: Integer overflow in the decode_digit function in
685 puny_decode.c in libidn (CVE-2017-14062)
686 [22342] nscd: NSCD not properly caching netgroup
687 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
688 [22550] localedata: es_ES locale (and other es_* locales): collation
689 should treat ñ as a primary different character, sync the collation
690 for Spanish with CLDR
691 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
692 by gcc configured with --enable-default-pie
693 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
694 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
695 crossing 2GB threshold (CVE-2017-18269)
696 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
698 [22735] time: Misleading typo in time.h source comment regarding
700 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
701 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
702 `__assert_perror_fail ()' to `__assert_fail_base ()'
703 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
705 [22786] libc: Stack buffer overflow in realpath() if input size is close
706 to SSIZE_MAX (CVE-2018-11236)
707 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
708 through an absolute DT_NEEDED path
709 [22792] build: tcb-offsets.h dependency dropped
710 [22797] libc: pkey_get() uses non-reserved name of argument
711 [22807] libc: PTRACE_* constants missing for powerpc
712 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
713 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
714 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
715 [22848] localedata: ca_ES: update date definitions from CLDR
716 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
717 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
718 [22896] localedata: Update locale data for an_ES
719 [22902] math: float128 test failures with GCC 8
720 [22918] libc: multiple common of `__nss_shadow_database'
721 [22919] libc: sparc32: backtrace yields infinite backtrace with
723 [22926] libc: FTBFS on powerpcspe
724 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
726 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
727 [22947] libc: FAIL: misc/tst-preadvwritev2
728 [22963] localedata: cs_CZ: Add alternative month names
729 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
730 [22996] localedata: change LC_PAPER to en_US in es_BO locale
731 [22998] dynamic-link: execstack tests are disabled when SELinux is
733 [23005] network: Crash in __res_context_send after memory allocation
735 [23007] math: strtod cannot handle -nan
736 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
737 [23036] regex: regex equivalence class regression
738 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
739 [23069] libc: sigaction broken on riscv64-linux-gnu
740 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
741 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
742 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
743 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
744 and libc build with -Os)
745 [23140] localedata: More languages need two forms of month names
746 [23145] libc: _init/_fini aren't marked as hidden
747 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
748 [23171] math: C++ iseqsig for long double converts arguments to double
749 [23178] nscd: sudo will fail when it is run in concurrent with commands
750 that changes /etc/passwd
751 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
753 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
754 [23208] localedata: New locale - Lower Sorbian (dsb)
755 [23233] regex: Memory leak in build_charclass_op function in file
757 [23236] stdio: Harden function pointers in _IO_str_fields
758 [23250] nptl: Offset of __private_ss differs from GCC
759 [23253] math: tgamma test suite failures on i686 with -march=x86-64
760 -mtune=generic -mfpmath=sse
761 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
763 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
764 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
766 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
767 [23277] math: nan function should not have const attribute
768 [23279] math: scanf and strtod wrong for some hex floating-point
769 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
771 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
772 [23303] build: undefined reference to symbol
773 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
774 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
776 [23313] stdio: libio vtables validation and standard file object
778 [23329] libc: The __libc_freeres infrastructure is not properly run across
780 [23349] libc: Various glibc headers no longer compatible with
782 [23351] malloc: Remove unused code related to heap dumps and malloc
784 [23363] stdio: stdio-common/tst-printf.c has non-free license
785 [23396] regex: Regex equivalence regression in single-byte locales
786 [23422] localedata: oc_FR: More updates of locale data
787 [23442] build: New warning with GCC 8
788 [23448] libc: Out of bounds access in IBM-1390 converter
789 [23456] libc: Wrong index_cpu_LZCNT
790 [23458] build: tst-get-cpu-features-static isn't added to tests
791 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
793 [23467] dynamic-link: x86/CET: A property note parser bug
800 * The GNU C Library can now be compiled with support for building static
801 PIE executables (See --enable-static-pie in INSTALL). These static PIE
802 executables are like static executables but can be loaded at any address
803 and provide additional security hardening benefits at the cost of some
804 memory and performance. When the library is built with --enable-static-pie
805 the resulting libc.a is usable with GCC 8 and above to create static PIE
806 executables using the GCC option '-static-pie'. This feature is currently
807 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
808 aarch64 with binutils 2.30 or later.
810 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
811 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
814 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
816 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
818 * In order to support faster and safer process termination the malloc API
819 family of functions will no longer print a failure address and stack
820 backtrace after detecting heap corruption. The goal is to minimize the
821 amount of work done after corruption is detected and to avoid potential
822 security issues in continued process execution. Reducing shutdown time
823 leads to lower overall process restart latency, so there is benefit both
824 from a security and performance perspective.
826 * The abort function terminates the process immediately, without flushing
827 stdio streams. Previous glibc versions used to flush streams, resulting
828 in deadlocks and further data corruption. This change also affects
829 process aborts as the result of assertion failures.
831 * On platforms where long double has the IEEE binary128 format (aarch64,
832 alpha, mips64, riscv, s390 and sparc), the math library now implements
833 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
834 These are the same interfaces added in version 2.26 for some platforms where
835 this format is supported but is not the format of long double.
837 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
838 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
839 implements interfaces for that type, as defined by ISO/IEC TS
840 18661-3:2015. These are corresponding interfaces to those supported for
843 * The math library now implements interfaces for the _Float32, _Float64 and
844 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
845 corresponding interfaces to those supported for _Float128.
847 * glibc now implements the memfd_create and mlock2 functions on Linux.
849 * Support for memory protection keys was added. The <sys/mman.h> header now
850 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
853 * The copy_file_range function was added.
855 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
857 * The ldconfig utility now processes `include' directives using the C/POSIX
858 collation ordering. Previous glibc versions used locale-specific
859 ordering, the change might break systems that relied on that.
861 * Support for two grammatical forms of month names has been added.
862 In a call to strftime, the "%B" and "%b" format specifiers will now
863 produce the grammatical form required when the month is used as part
864 of a complete date. New "%OB" and "%Ob" specifiers produce the form
865 required when the month is named by itself. For instance, in Greek
866 and in many Slavic and Baltic languages, "%B" will produce the month
867 in genitive case, and "%OB" will produce the month in nominative case.
869 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
870 are all valid and will all accept any known form of month
871 name---standalone or complete, abbreviated or full. In a call to
872 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
873 the strings used by "%B" and "%b", respectively. New query
874 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
875 used by "%OB" and "%Ob", respectively.
877 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
878 define the strings for %OB and %Ob, respectively; these have the
879 same syntax as "mon" and "abmon". These arrays are optional; if they
880 are not provided then they have the same content as "mon" and "abmon",
883 These features are provided for locales which define "alt_mon" and/or
884 "ab_alt_mon" in their locale source data. This release includes such
885 alternative month name data for the following languages: Belarusian,
886 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
888 This feature is currently a GNU extension, but it is expected to
889 be added to the next revision of POSIX, and it is also already
890 available on some BSD-derived operating systems.
892 This feature will cause existing statically compiled applications
893 to fail to load locales and fall back to the builtin C/POSIX locales.
894 See notes below for other changes affecting compatibility.
896 * Support for the RISC-V ISA running on Linux has been added. This port
897 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
898 for the following ISA and ABI pairs:
904 Deprecated and removed features, and other changes affecting compatibility:
906 * Statically compiled applications attempting to load locales compiled for the
907 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
908 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
909 support for two grammatical forms of the month names, also extends the locale
910 data binary format. Static applications needing locale support must be
911 recompiled to match the runtime and data they are deployed with. In some
912 distributions there is an upgrade window where dynamically linked applications
913 may use a new library but the old locale data and also fall back to the
914 builtin C/POSIX locales; restarting the application process is sufficient to
917 * Support for statically linked applications which call dlopen is deprecated
918 and will be removed in a future version of glibc. Applications which call
919 dlopen need to be linked dynamically instead.
921 * Support for old programs which use internal stdio data structures and
922 functions is deprecated. This includes programs which use the C++ streams
923 provided by libstdc++ in GCC 2.95. Programs which use the internal
924 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
925 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
926 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
927 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
928 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
929 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
930 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
931 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
932 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
933 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
934 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
935 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
936 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
937 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
938 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
939 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
940 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
941 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
942 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
943 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
944 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
945 future version of glibc. Unlike other symbol removals, these old
946 applications will not be supported using compatibility symbols.
948 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
949 defined by <sys/ptrace.h>.
951 * libm no longer supports SVID error handling (calling a user-provided
952 matherr function on error) or the _LIB_VERSION variable to control error
953 handling. (SVID error handling and the _LIB_VERSION variable still work
954 for binaries linked against older versions of the GNU C Library.) The
955 libieee.a library is no longer provided. math.h no longer defines struct
956 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
957 TLOSS, PLOSS and HUGE.
959 * The libm functions pow10, pow10f and pow10l are no longer supported for
960 new programs. Programs should use the standard names exp10, exp10f and
961 exp10l for these functions instead.
963 * The mcontext_t type is no longer the same as struct sigcontext. On
964 platforms where it was previously the same, this changes the C++ name
965 mangling for interfaces involving this type.
967 * The add-ons mechanism for building additional packages at the same time as
968 glibc has been removed. The --enable-add-ons configure option is now
971 * The --without-fp configure option is now ignored. Whether hardware
972 floating-point instructions are used is now configured based on whether
973 the compiler used at configure time (without any options implied by a
974 --with-cpu= configure option) uses such instructions.
976 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
977 the specified string can be parsed as a domain name.
979 * In the malloc_info output, the <heap> element may contain another <aspace>
980 element, "subheaps", which contains the number of sub-heaps.
982 * The libresolv function p_secstodate is no longer supported for new
985 * The tilepro-*-linux-gnu configuration is no longer supported.
987 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
988 and will be removed in a future release. Software that is still using
989 either header should be updated to use standard <stdio.h> interfaces
992 libio.h was originally the header for a set of supported GNU extensions,
993 but they have not been maintained as such in many years, they are now
994 standing in the way of improvements to stdio, and we don't think there are
995 any remaining external users. _G_config.h was never intended for public
996 use, but predates the bits convention.
998 Changes to build and runtime requirements:
1000 * bison version 2.7 or later is required to generate code in the 'intl'
1003 Security related changes:
1005 CVE-2009-5064: The ldd script would sometimes run the program under
1006 examination directly, without preventing code execution through the
1007 dynamic linker. (The glibc project disputes that this is a security
1008 vulnerability; only trusted binaries must be examined using the ldd
1011 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
1012 suffered from a one-byte overflow during ~ operator processing (either
1013 on the stack or the heap, depending on the length of the user name).
1014 Reported by Tim Rühsen.
1016 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
1017 would sometimes fail to free memory allocated during ~ operator
1018 processing, leading to a memory leak and, potentially, to a denial
1021 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
1022 without GLOB_NOESCAPE, could write past the end of a buffer while
1023 unescaping user names. Reported by Tim Rühsen.
1025 CVE-2017-17426: The malloc function, when called with an object size near
1026 the value SIZE_MAX, would return a pointer to a buffer which is too small,
1027 instead of NULL. This was a regression introduced with the new malloc
1028 thread cache in glibc 2.26. Reported by Iain Buclaw.
1030 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
1031 to the allocation of too much memory. (This is not a security bug per se,
1032 it is mentioned here only because of the CVE assignment.) Reported by
1035 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
1036 of the number of search path components. (This is not a security
1037 vulnerability per se because no trust boundary is crossed if the fix for
1038 CVE-2017-1000366 has been applied, but it is mentioned here only because
1039 of the CVE assignment.) Reported by Qualys.
1041 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
1042 for AT_SECURE or SUID binaries could be used to load libraries from the
1045 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
1046 succeeds without returning an absolute path due to unexpected behaviour
1047 of the Linux kernel getcwd syscall. Reported by halfdog.
1049 CVE-2018-6485: The posix_memalign and memalign functions, when called with
1050 an object size near the value of SIZE_MAX, would return a pointer to a
1051 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
1053 CVE-2018-6551: The malloc function, when called with an object size near
1054 the value of SIZE_MAX, would return a pointer to a buffer which is too
1055 small, instead of NULL.
1057 The following bugs are resolved with this release:
1059 [866] glob: glob should match dangling symlinks
1060 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1061 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1063 [5997] math: Very slow execution of sinf function
1064 [10580] localedata: hr_HR: updated locale
1065 [10871] locale: 'mon' array should contain both nominative and genitive
1067 [12349] localedata: eu_ES: incorrect thousands separator
1068 [13605] localedata: shn_MM: new Shan locale
1069 [13805] localedata: ru_RU: currency should use ',' as radix point
1070 [13953] localedata: km_KH: locale update
1071 [13994] localedata: mjw_IN: new locale
1072 [14121] build: make writes .mo files in po directory
1073 [14333] libc: Fix the race between atexit() and exit()
1074 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1075 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1077 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1078 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1079 width Latin characters
1080 [15332] localedata: es_CU: locale update
1081 [15436] stdio: Don't close or flush stdio streams on abort
1082 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1084 [16148] localedata: ca_ES: incorrect thousands separator
1085 [16750] dynamic-link: ldd should not try to execute the binaries
1087 [16777] localedata: pl_PL: incorrect thousands separator in locale
1088 [16905] localedata: hanzi: new collation
1089 [17563] localedata: cmn_TW: add hanzi collation
1090 [17750] localedata: wrong collation order of diacritics in most locales
1091 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1093 [17956] build: Build fails on missing definitions from header file
1094 nss/nss.h when Mozilla NSS is used for cryptography
1095 [18203] libc: realpath() does not handle unreachable paths correctly
1096 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1097 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1098 [18822] libc: Internal functions are called via PLT
1099 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1100 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1101 [19574] libc: glibc should support building static PIE binaries
1102 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1104 [19971] glob: glob: Do not skip entries with zero d_ino values
1105 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1106 [20008] localedata: km_KH: convert to translit_neutral
1107 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1108 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1109 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1110 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1111 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1113 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1114 they're set, wrong errors returned by gaih_inet when lookup functions
1116 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1117 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1119 [20952] localedata: yuw_PG: new locale
1120 [21084] localedata: charmaps/IBM858: new codepage
1121 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1122 [21242] libc: assert gives pedantic warning in old gcc versions
1123 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1124 __regcall calling convention
1125 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1126 [21326] libc: C99 functions are not declared for C++11 and later if
1127 _GNU_SOURCE is not predefined by g++
1128 [21457] libc: sys/ucontext.h namespace
1129 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1130 [21660] math: GCC fails to compile a formula with tgmath.h
1131 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1132 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1133 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1134 [21684] math: tgmath.h handling of complex integers
1135 [21685] math: tgmath.h handling of bit-fields
1136 [21686] math: tgmath.h handling of __int128
1137 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1139 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1141 [21750] localedata: column width of characters incompatible with classical
1143 [21754] malloc: malloc: Perform as little work as possible after heap
1144 consistency check failures
1145 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1146 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1147 [21791] string: Unused XXX_chk_XXX functions in libc.a
1148 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1150 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1152 [21845] localedata: Added new Locale bho_NP
1153 [21853] localedata: Fix abday Which looks same as day in zh_SG
1154 [21854] localedata: Added New Locale en_SC
1155 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1156 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1157 _dl_runtime_resolve_avx_slow
1158 [21885] network: getaddrinfo: gethosts does not release resolver context
1159 on memory allocation failure
1160 [21899] libc: XPG4.2 sigaction namespace
1161 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1163 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1165 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1166 errno value, causing getaddrinfo to fail
1167 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1168 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1169 instead of EAI_NODATA
1170 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1171 constant PTRACE_SEIZE_DEVEL
1172 [21930] math: C-only gcc builtins used in <math.h> isinf
1173 [21932] network: Unpaired __resolv_context_get in generic get*_r
1175 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1176 [21944] libc: sigval namespace
1177 [21951] localedata: Update hanzi collation by stroke
1178 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1179 sysdeps/x86_64/fpu/e_expf.S
1180 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1181 allocation in syscall loops)
1182 [21959] localedata: Fix Country name for xh_ZA
1183 [21960] localedata: Fix abmon for bem_ZM
1184 [21966] math: AVX2 mathvec functions use FMA without checking
1185 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1186 [21971] localedata: Added New Locale for mfe_MU
1187 [21972] libc: assert macro requires operator== (int) for its argument type
1188 [21973] math: [sparc] libm missing sqrtl compat symbol
1189 [21974] libc: Remove __bb_init_func and __bb_exit_func
1190 [21982] string: stratcliff.c: error: assuming signed overflow does not
1192 [21986] stdio: __guess_grouping is called incorrectly
1193 [21987] math: [sparc32] wrong bits/long-double.h installed
1194 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1196 [22022] localedata: Missing country_name for mni_IN
1197 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1199 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1201 [22026] locale: iconv_open: heap overflow on gconv_init failure
1202 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1203 [22035] math: [m68k] bits/math-inline.h macro namespace
1204 [22038] localedata: Fix abbreviated weeks and months for Somali
1205 [22044] localedata: Remove redundant data for Limburgish Language
1206 [22050] malloc: Linking with -lmcheck does not hook
1207 __malloc_initialize_hook correctly
1208 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1209 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1210 [22070] localedata: charmaps/UTF-8: wcwidth for
1211 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1212 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1213 Jungseong and Jongseong) should be 0
1214 [22078] nss: nss_files performance issue in multi mode
1215 [22082] math: bits/math-finite.h exp10 condition
1216 [22086] libc: pcprofiledump incorrect cross-endian condition
1217 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1218 [22095] network: Name server address allocation memory leak in resolv.conf
1220 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1222 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1223 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1225 [22111] malloc: malloc: per thread cache is not returned when thread exits
1226 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1227 [22134] libc: [linux] implement fexecve with execveat
1228 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1230 [22145] libc: ttyname() gives up too early in the face of namespaces
1231 [22146] math: C++ build issue with float128 on x86_64
1232 [22153] nptl: nptl: save error code before process termination
1233 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1234 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1235 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1236 [22165] libc: [hppa] Text relocations in libc.so
1237 [22180] libc: destructor registered via __cxa_atexit is called twice
1238 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1239 symlinks") cause "make" segfaults
1240 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1242 [22207] libc: FAIL: stdlib/test-atexit-race
1243 [22225] math: nearbyint arithmetic moved before feholdexcept
1244 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1245 [22235] math: iscanonical in C++ and float128
1246 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1247 the svid compat wrapper
1248 [22244] math: ynf and yn are wrong without the svid compat wrapper
1249 [22273] libc: Improper assert in Linux posix_spawn implementation
1250 [22284] libc: -pg -pie doesn't work
1251 [22292] locale: localedef exits with error 4 when it should be error 1
1252 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1253 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1255 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1256 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1258 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1259 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1260 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1261 [22322] libc: [mips64] wrong bits/long-double.h installed
1262 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1263 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1265 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1266 [22343] malloc: Integer overflow in posix_memalign
1267 [22347] libc: getrandom() returns the number of bytes that were copied to
1268 the buffer even though the comments say "Return 0 on success and -1 on
1270 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1271 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1273 [22370] dynamic-link: Incorrect note padding check
1274 [22375] libc: malloc returns pointer from tcache_get when should return
1275 NULL (CVE-2017-17426)
1276 [22377] math: iseqsig, float128 and C++
1277 [22382] localedata: Error in tpi_PG locale
1278 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1279 inside the ASCII printable range
1280 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1282 [22403] localedata: Slash needs escaping in some locales
1283 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1284 [22409] network: res_hnok does not accept some host names used on the
1286 [22412] network: res_dnok, res_hnok should perform syntax checks
1287 [22413] network: ns_name_pton ignores syntactically invalid trailing
1289 [22415] stdio: setvbuf can lead to invalid free/segfault
1290 [22432] build: Non-deterministic build
1291 [22439] malloc: malloc_info should compute summary statistics for all sub-
1293 [22442] network: if_nametoindex could report index for the wrong
1294 networking interface
1295 [22446] build: aliasing violation calling readlink in handle_request
1296 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1297 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1298 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1299 __nscd_hash/__nss_hash
1300 [22463] network: p_secstodate overflow handling
1301 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1302 [22478] libc: sigwait can fail with EINTR
1303 [22505] libc: ldconfig processes include directive in locale-specific
1305 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1306 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1307 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1308 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1309 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1310 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1311 same as for Croatian
1312 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1313 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1314 [22577] libc: missing newline after "cannot allocate TLS data structures
1316 [22588] manual: manual/conf.texi: missing underscore in front of
1318 [22593] math: nextafter and nexttoward are declared with const attribute
1319 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1320 [22603] string: ia64 memchr overflows internal pointer check
1321 [22605] libc: SH clone does not set the exit code correctly
1322 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1324 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1325 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1326 modified in case of success
1327 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1328 [22615] manual: manual: ambiguous wording about errno value in case of
1330 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1332 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1333 binaries or if /proc is not mounted (CVE-2017-16997)
1334 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1335 [22630] build: $(no-pie-ldflag) is no longer effective
1336 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1337 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1338 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1339 [22637] nptl: guard size is subtracted from thread stack size instead of
1341 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1342 [22657] localedata: hu_HU: Avoid double space in date
1343 [22660] math: fmax, fmin sNaN handling on alpha
1344 [22664] libc: New warning of GCC8
1345 [22665] math: alpha: ceil and floor raise inexact exceptions
1346 [22666] math: alpha: trunc raise inexact exceptions
1347 [22667] libc: makecontext lacks stack alignment on i386
1348 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1349 [22679] libc: getcwd(3) can succeed without returning an absolute path
1351 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1352 elision and tunables
1353 [22687] math: [powerpc-nofpu] complex long double functions spurious
1355 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1356 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1357 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1359 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1360 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1362 [22701] nis: Incomplete removal of libnsl
1363 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1364 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1365 [22715] dynamic-link: FAIL: elf/tst-audit10
1366 [22719] libc: Backtrace tests fail on hppa
1367 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1368 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1369 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1370 before the first call to crypt_r () in crypt/badsalttest.c
1377 * A per-thread cache has been added to malloc. Access to the cache requires
1378 no locks and therefore significantly accelerates the fast path to allocate
1379 and free small amounts of memory. Refilling an empty cache requires locking
1380 the underlying arena. Performance measurements show significant gains in a
1381 wide variety of user workloads. Workloads were captured using a special
1382 instrumented malloc and analyzed with a malloc simulator. Contributed by
1383 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1385 * Unicode 10.0.0 Support: Character encoding, character type info, and
1386 transliteration tables are all updated to Unicode 10.0.0, using
1387 generator scripts contributed by Mike FABIAN (Red Hat).
1388 These updates cause user visible changes, especially the changes in
1389 wcwidth for many emoji characters cause problems when emoji sequences
1390 are rendered with pango, see for example:
1391 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1393 * Collation of Hungarian has been overhauled and is now consistent with "The
1394 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1397 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1399 - The GNU C Library will now detect when /etc/resolv.conf has been
1400 modified and reload the changed configuration. The new resolver option
1401 “no-reload” (RES_NORELOAD) disables this behavior.
1403 - The GNU C Library now supports an arbitrary number of search domains
1404 (configured using the “search” directive in /etc/resolv.conf);
1405 previously, there was a hard limit of six domains. For backward
1406 compatibility, applications that directly modify the ‘_res’ global
1407 object are still limited to six search domains.
1409 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
1410 Library will now randomly pick a name server from the configuration as a
1411 starting point. (Previously, the second name server was always used.)
1413 * The tunables feature is now enabled by default. This allows users to tweak
1414 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1416 * New function reallocarray, which resizes an allocated block (like realloc)
1417 to the product of two sizes, with a guaranteed clean failure upon integer
1418 overflow in the multiplication. Originally from OpenBSD, contributed by
1419 Dennis Wölfing and Rüdiger Sonderfeld.
1421 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1422 These are extended versions of preadv and pwritev, respectively, taking an
1423 additional flags argument. The set of supported flags depends on the
1424 running kernel; full support currently requires kernel 4.7 or later.
1426 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1427 create a new session ID for the spawned process. This feature is
1428 scheduled to be added to the next major revision of POSIX; for the time
1429 being, it is available under _GNU_SOURCE.
1431 * errno.h is now safe to use from C-preprocessed assembly language on all
1432 supported operating systems. In this context, it will only define the
1433 Exxxx constants, as preprocessor macros expanding to integer literals.
1435 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1436 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1437 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1438 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1440 To compile programs that use this feature, the compiler must support
1441 128-bit floating point with the type name _Float128 (as defined by TS
1442 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1443 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1444 must be defined to make the new interfaces visible.
1446 The new functions and macros correspond to those present for other
1447 floating-point types (except for a few obsolescent interfaces not
1448 supported for the new type), with F128 or f128 suffixes; for example,
1449 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1450 printf or scanf formats for the new type; the strfromf128 and strtof128
1451 interfaces should be used instead.
1453 Deprecated and removed features, and other changes affecting compatibility:
1455 * The synchronization that pthread_spin_unlock performs has been changed to
1456 now be equivalent to a C11 atomic store with release memory order to the
1457 spin lock's memory location. Previously, several (but not all)
1458 architectures used stronger synchronization (e.g., containing what is
1459 often called a full barrier). This change can improve performance, but
1460 may affect odd fringe uses of spin locks that depend on the previous
1461 behavior (e.g., using spin locks as atomic variables to try to implement
1462 Dekker's mutual exclusion algorithm).
1464 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1467 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1468 will only be built and installed when the GNU C Library is configured with
1469 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1470 as TIRPC or rpcsvc-proto, to be used.
1472 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1473 libnss_compat, are deprecated, and will not be built or installed by
1476 The NIS(+) support library, libnsl, is also deprecated. By default, a
1477 compatibility shared library will be built and installed, but not headers
1478 or development libraries. Only a few NIS-related programs require this
1479 library. (In particular, the GNU C Library has never required programs
1480 that use 'gethostbyname' to be linked with libnsl.)
1482 Replacement implementations based on TIRPC, which additionally support
1483 IPv6, are available from <https://github.com/thkukuk/>. The configure
1484 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1485 name service modules, to be built and installed.
1487 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1488 support is enabled, the configured recursive resolver must support EDNS.
1489 (Responding to EDNS-enabled queries with responses which are not
1490 EDNS-enabled is fine, but FORMERR responses are not.)
1492 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1493 servers have not supported this opcode for a long time.
1495 * The _res_opcodes variable has been removed from libresolv. It had been
1496 exported by accident.
1498 * <string.h> no longer includes inline versions of any string functions,
1499 as this kind of optimization is better done by the compiler. The macros
1500 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1502 * The nonstandard header <xlocale.h> has been removed. Most programs should
1503 use <locale.h> instead. If you have a specific need for the definition of
1504 locale_t with no other declarations, please contact
1505 libc-alpha@sourceware.org and explain.
1507 * The obsolete header <sys/ultrasound.h> has been removed.
1509 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1511 * The obsolete function cfree has been removed. Applications should use
1514 * The stack_t type no longer has the name struct sigaltstack. This changes
1515 the C++ name mangling for interfaces involving this type.
1517 * The ucontext_t type no longer has the name struct ucontext. This changes
1518 the C++ name mangling for interfaces involving this type.
1520 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1521 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1522 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1523 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1524 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1525 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1526 fpregset_t type no longer has the name struct fpu. This changes the C++
1527 name mangling for interfaces involving those types.
1529 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1530 synced with the kernel:
1532 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1533 are not supported on this architecture and have been removed.
1535 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1536 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1537 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1539 Programs that assume the GET/SETREGS ptrace requests are universally
1540 available will now fail to build, instead of malfunctioning at runtime.
1542 Changes to build and runtime requirements:
1544 * Linux kernel 3.2 or later is required at runtime, on all architectures
1545 supported by that kernel. (This is a change from version 2.25 only for
1548 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1550 * On most architectures, GCC 4.9 or later is required to build the GNU C
1551 Library. On powerpc64le, GCC 6.2 or later is required.
1553 Older GCC versions and non-GNU compilers are still supported when
1554 compiling programs that use the GNU C Library. (We do not know exactly
1555 how old, and some GNU extensions to C may be _de facto_ required. If you
1556 are interested in helping us make this statement less vague, please
1557 contact libc-alpha@sourceware.org.)
1559 Security related changes:
1561 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1562 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1564 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1565 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1567 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1568 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1571 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1572 fixed (CVE-2017-12133).
1574 The following bugs are resolved with this release:
1576 [984] network: Respond to changed resolv.conf in gethostbyname
1577 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1578 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1580 [12189] libc: __stack_chk_fail should not attempt a backtrace
1582 [14096] time: Race condition on timezone/tst-timezone.out
1583 [14172] localedata: az_IR: new locale
1584 [14995] build: glibc fails to build if gold is the default linker, even if
1586 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1587 [16637] network: inet_pton function is accepting IPv6 with bad format
1588 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1589 x86 and other generic code
1590 [16875] localedata: ko_KR: fix lang_name
1591 [17225] localedata: ar_SY: localized month names for May and June are
1593 [17297] localedata: da_DK: wrong date_fmt string
1594 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1595 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1596 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1597 [19066] localedata: ar_SA abbreviated day and month names are in English
1598 [19569] network: resolv: Support an arbitrary number of search domains
1599 [19570] network: Implement random DNS server selection in the stub
1601 [19838] locale: localedef fails on PA-RISC
1602 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1603 order of 0D36 and 0D37
1604 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1606 [20098] libc: FAIL: debug/backtrace-tst on hppa
1607 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1609 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1611 [20313] localedata: Update locale data to Unicode 9.0
1612 [20424] manual: Document how to provide a malloc replacement
1613 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1615 [20686] locale: Add el_GR@euro to SUPPORTED.
1616 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1617 failures consistently
1618 [21015] dynamic-link: Document and fix --enable-bind-now
1619 [21016] nptl: pthread_cond support is broken on hppa
1620 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1621 frame-pointer on i386
1622 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1624 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1625 [21088] libc: Build fails with --enable-static-nss
1626 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1627 generic c code is used
1628 [21109] libc: Tunables broken on big-endian
1629 [21112] math: powf has large ulp errors with base close to 1 and exponent
1631 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1633 [21120] malloc: glibc malloc is incompatible with GCC 7
1634 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1636 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1637 (-0.0) when linking with -lieee
1638 [21171] math: log10, log2 and lgamma return incorrect results
1639 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1640 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1641 [21207] localedata: ce_RU: update weekdays from CLDR
1642 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1643 [21217] localedata: Update months from CLDR-31
1644 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1645 [21243] libc: support_delete_temp_file should issue warning for failed
1647 [21244] libc: support resolv_test_start() socket fd close should be
1649 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1650 new posix_spawn implementation
1651 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1652 leads to lower CPU frequency
1653 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1654 [21261] libc: [sparc64] bits/setjmp.h namespace
1655 [21267] network: [mips] bits/socket.h IOC* namespace
1656 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1657 [21270] libc: mmap64 silently truncates large offset values
1658 [21275] libc: posix_spawn always crashes on ia64 now
1659 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1660 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1661 [21289] libc: Incorrect declaration for 32-bit platforms with
1662 _FILE_OFFSET_BITS=64 causes build error
1663 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1664 not support gethostbyname4_r
1665 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1667 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1669 [21340] libc: Support POSIX_SPAWN_SETSID
1670 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1671 [21359] network: ns_name_pack needs additional byte in destination buffer
1672 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1673 against fragmentation attacks (CVE-2017-12132)
1674 [21369] network: resolv: Remove EDNS fallback
1675 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1677 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1678 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1679 [21393] stdio: Missing dup3 error check in freopen, freopen64
1680 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1681 [21399] localedata: Bad description for U00EC in
1682 localedata/charmaps/CP1254
1683 [21411] malloc: realloc documentation error
1684 [21426] network: sys/socket.h uio.h namespace
1685 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1686 [21445] libc: signal.h bsd_signal namespace
1687 [21455] network: Network headers stdint.h namespace
1688 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1690 [21475] network: resolv: Overlong search path is truncated mid-label
1691 [21511] libc: sigstack namespace
1692 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1693 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1694 bits/syscall.h: No such file or directory
1695 [21517] libc: struct sigaltstack namespace
1696 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1697 [21533] localedata: Update locale data to Unicode 10.0
1699 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1700 junk at end of line, first unrecognized character is `@'
1701 [21538] libc: SIG_HOLD missing for XPG4
1702 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1703 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1704 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1705 [21543] libc: sigevent namespace
1706 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1707 size for general purpose registers in mcontext_t structure
1708 [21550] libc: sigwait namespace
1709 [21552] libc: XPG4 bsd_signal namespace
1710 [21554] libc: sigpause namespace
1711 [21560] libc: sys/wait.h signal.h namespace
1712 [21561] libc: waitid namespace
1713 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1714 '/usr/include/stdlib.h': Permission denied
1715 [21575] libc: sys/wait.h missing struct rusage definition
1716 [21584] libc: sigaltstack etc namespace
1717 [21597] libc: siginterrupt namespace
1718 [21607] math: hppa: FAIL: math/test-tgmath
1719 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1721 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1722 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1723 stack and heap (CVE-2017-1000366)
1724 [21625] libc: wait3 namespace
1725 [21654] nss: Incorrect pointer alignment in NSS group merge result
1727 [21657] network: Parse interface zone id for node-local multicast
1728 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1730 [21666] libc: .symver is used on common symbol
1731 [21668] network: resolv: res_init cross-thread broadcast introduces race
1733 [21687] math: tgmath.h totalorder, totalordermag return type
1734 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1736 [21696] libc: Incorrect assumption of of __cpu_mask in
1737 posix/sched_cpucount.c
1738 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1739 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1741 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1742 leading to relocation crash
1743 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1744 `resolv_conf_matches (resp, conf)' failed.
1745 [21710] localedata: Added Samoan language locale for Samoa
1746 [21711] localedata: Pashto yesstr/nostr locale are missing
1747 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1748 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1749 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1750 [21723] localedata: yesstr/nostr missing for Chinese language locale
1751 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1753 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1755 [21728] localedata: New Locale for Tongan language
1756 [21729] localedata: incorrect LC_NAME fields for hi_IN
1757 [21733] localedata: yesstr and nostr are missing for zh_HK
1758 [21734] localedata: Missing yesstr and nostr are for kw_GB
1759 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1760 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1761 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1762 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1764 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1766 [21749] localedata: Wrong abbreviated day name (“abday”) for
1768 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1769 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1770 [21759] localedata: missing yesstr and nostr for Tigrinya
1771 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1772 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1773 [21767] localedata: Missing Bislama locales
1774 [21768] localedata: Missing yesstr and nostr for aa_ET
1775 [21770] localedata: Missing Field in li_NL
1776 [21778] nptl: Robust mutex may deadlock
1777 [21779] libc: MicroBlaze segfaults when loading libpthread
1778 [21783] localedata: Fix int_select international_call_prefixes
1779 [21784] localedata: Inconsistency in country_isbn
1780 [21788] localedata: Missing Country Postal Abbreviations
1781 [21794] localedata: Added-country_isbn-for-Italy
1782 [21795] localedata: Add/Fix country_isbn for France
1783 [21796] localedata: Added country_isbn for Republic of Korea
1784 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1785 [21799] localedata: Added int_select international_call_prefixes
1786 [21801] localedata: Added int_select international_call_prefixes
1787 [21804] nptl: Double semicolon in thread-shared-types.h
1788 [21807] localedata: LC_ADDRESS fix for pap_CW
1789 [21808] localedata: Fix LC_ADDRESS for pap_AW
1790 [21821] localedata: Added country_name in mai_IN
1791 [21822] localedata: Fix LC_TIME for mai_IN
1792 [21823] localedata: missing yesstr, nostr for sa_IN
1793 [21825] localedata: Fix name_mrs for mag_IN
1794 [21828] localedata: 2.26 changelog should mention user visible changes
1796 [21835] localedata: Added Maithili language locale for Nepal
1797 [21838] localedata: Removed redundant data for the_NP
1798 [21839] localedata: Fix LC_MONETARY for ta_LK
1799 [21844] localedata: Fix Latin characters and Months Sequence.
1800 [21848] localedata: Fix mai_NP Title Name
1805 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1806 24731-2:2010, is supported to enable declarations of functions from that
1807 TR. Note that not all functions from that TR are supported by the GNU C
1810 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1811 18661-1:2014, is supported to enable declarations of functions and macros
1812 from that TS. Note that not all features from that TS are supported by
1815 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1816 18661-4:2015, is supported to enable declarations of functions and macros
1817 from that TS. Note that most features from that TS are not supported by
1820 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1821 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1822 Since the GNU C Library defaults to a much newer revision of POSIX, this
1823 will only affect programs that specifically request an old conformance
1824 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1825 see a change in the visible declarations, but a program compiled with
1826 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1829 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1830 defined by all multithreaded code, but glibc has not required this for
1833 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1834 means that in a future release, the macros “major”, “minor”, and “makedev”
1835 will only be available from <sys/sysmacros.h>.
1837 These macros are not part of POSIX nor XSI, and their names frequently
1838 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1839 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1840 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1843 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1844 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1845 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1847 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1848 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1849 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1850 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1851 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1852 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1853 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1854 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1855 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1856 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1857 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1860 * New <math.h> features are added from TS 18661-1:2014:
1862 - Signaling NaN macros: SNANF, SNAN, SNANL.
1864 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1865 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1866 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1868 - llogb functions: the llogb, llogbf and llogbl functions, and the
1869 FP_LLOGB0 and FP_LLOGBNAN macros.
1871 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1874 - Comparison macros: iseqsig.
1876 - Classification macros: iscanonical, issubnormal, iszero.
1878 - Total order functions: totalorder, totalorderf, totalorderl,
1879 totalordermag, totalordermagf, totalordermagl.
1881 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1883 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1884 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1886 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1887 are added to libc. They convert a floating-point number into string.
1889 * Most of glibc can now be built with the stack smashing protector enabled.
1890 It is recommended to build glibc with --enable-stack-protector=strong.
1891 Implemented by Nick Alcock (Oracle).
1893 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1894 intended to be used instead of memset() to erase sensitive data after use;
1895 the compiler will not optimize out calls to explicit_bzero even if they
1896 are "unnecessary" (in the sense that no _correct_ program can observe the
1897 effects of the memory clear).
1899 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1900 to float instead of double. This does not affect the ABI of any libraries
1901 that are part of the GNU C Library, but may affect the ABI of other
1902 libraries that use this type in their interfaces.
1904 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1905 float_t and double_t types are now defined to long double instead of float
1906 and double. These options are not the default, and this does not affect
1907 the ABI of any libraries that are part of the GNU C Library, but it may
1908 affect the ABI of other libraries that use this type in their interfaces,
1909 if they are compiled or used with those options.
1911 * The getentropy and getrandom functions, and the <sys/random.h> header file
1914 * The buffer size for byte-oriented stdio streams is now limited to 8192
1915 bytes by default. Previously, on Linux, the default buffer size on most
1916 file systems was 4096 bytes (and thus remains unchanged), except on
1917 network file systems, where the buffer size was unpredictable and could be
1918 as large as several megabytes.
1920 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1921 for the Linux quota interface which predates kernel version 2.4.22 has
1924 * The malloc_get_state and malloc_set_state functions have been removed.
1925 Already-existing binaries that dynamically link to these functions will
1926 get a hidden implementation in which malloc_get_state is a stub. As far
1927 as we know, these functions are used only by GNU Emacs and this change
1928 will not adversely affect already-built Emacs executables. Any undumped
1929 Emacs executables, which normally exist only during an Emacs build, should
1930 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1932 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1933 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1934 “no-ip6-dotint” had already been the default, and support for the
1935 “ip6-dotint” option was removed from the Internet in 2006.
1937 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1938 flag from <resolv.h> have been removed. The option relied on a
1939 backwards-incompatible DNS extension which was never deployed on the
1942 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1943 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1944 They were already unimplemented.
1946 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1947 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1948 removed again from the IETF name lookup interface specification in RFC
1949 2553. Applications should use getaddrinfo instead.
1951 * DNSSEC-related declarations and definitions have been removed from the
1952 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1953 decode the data part of DNSSEC record types. Previous versions of glibc
1954 only implemented minimal support for the previous version of DNSSEC, which
1955 is incompatible with the currently deployed version.
1957 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1958 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1959 <arpa/nameser.h> header file because the distinction between RR types and
1960 meta-RR types is not officially standardized, subject to revision, and
1961 thus not suitable for encoding in a macro.
1963 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1964 and rhook members of the res_state type in <resolv.h> have been removed.
1965 The glibc stub resolver did not support these hooks, but the header file
1966 did not reflect that.
1968 * For multi-arch support it is recommended to use a GCC which has
1969 been built with support for GNU indirect functions. This ensures
1970 that correct debugging information is generated for functions
1971 selected by IFUNC resolvers. This support can either be enabled by
1972 configuring GCC with '--enable-gnu-indirect-function', or by
1973 enabling it by default by setting 'default_gnu_indirect_function'
1974 variable for a particular architecture in the GCC source file
1977 * GDB pretty printers have been added for mutex and condition variable
1978 structures in POSIX Threads. When installed and loaded in gdb these pretty
1979 printers show various pthread variables in human-readable form when read
1980 using the 'print' or 'display' commands in gdb.
1982 * Tunables feature added to allow tweaking of the runtime for an application
1983 program. This feature can be enabled with the '--enable-tunables' configure
1984 flag. The GNU C Library manual has details on usage and README.tunables has
1985 instructions on adding new tunables to the library.
1987 * A new version of condition variables functions have been implemented in
1988 the NPTL implementation of POSIX Threads to provide stronger ordering
1991 * A new version of pthread_rwlock functions have been implemented to use a more
1992 scalable algorithm primarily through not using a critical section anymore to
1995 Security related changes:
1997 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1998 have been created with makecontext could fail to terminate due to a
1999 missing .cantunwind annotation. This has been observed to lead to a hang
2000 (denial of service) in some Go applications compiled with gccgo. Reported
2001 by Andreas Schwab. (CVE-2016-6323)
2003 * The DNS stub resolver functions would crash due to a NULL pointer
2004 dereference when processing a query with a valid DNS question type which
2005 was used internally in the implementation. The stub resolver now uses a
2006 question type which is outside the range of valid question type values.
2009 The following bugs are resolved with this release:
2011 [4099] stdio: Overly agressive caching by stream i/o functions.
2012 [7065] build: Support building glibc with -fstack-protector or -fstack-
2014 [9842] localedata: en_CA: incorrect date format
2015 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
2016 before it started waiting
2017 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
2018 [15765] nptl: sem_open is wrongly a cancellation point
2019 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
2020 [16458] libc: endian.h and netinet/in.h byte order macros return values of
2022 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
2023 library linked with pthread
2024 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
2025 "FIXME: Ingo" issue)
2026 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
2027 [17252] libc: getrandom and getentropy syscall
2028 [17730] malloc: thread-local storage is sometimes improperly free()'d
2029 after being __libc_memalign()'d
2030 [18241] stdio: failed fseek on memstream does not set errno and can fail
2032 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
2034 [18463] nptl: pthread_cond_broadcast issue when surrounded by
2035 PTHREAD_PRIO_INHERIT mutex on ARM
2036 [18784] network: res_query and related function crash for special record
2037 type queries (CVE-2015-5180)
2038 [19380] math: strtod does not raise "inexact"
2039 [19387] string: Integer overflow in memchr
2040 [19390] string: Integer overflow in strncat
2041 [19398] build: linknamespace tests fail with massively parallel build
2042 [19402] nptl: Deadlock with robust shared mutex and asynchronous
2044 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
2045 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
2046 [19514] libc: [PATCH] Fix spelling errors in spelling
2047 "implement"/"implementation" in several places
2048 [19582] network: Deprecate RES_USE_INET6
2049 [19673] manual: clog10 docs appear to be erroneous
2050 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
2051 causes a segmentation fault
2052 [19826] libc: invalid pointer returned from __tls_get_addr with static
2054 [20016] network: resolv: Remove hooks support from the API
2055 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
2057 [20033] math: [x86_64] vectorized math function don't call the __finite
2059 [20116] nptl: use after free in pthread_create
2060 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2061 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2063 [20311] nptl: please install proc_service.h
2064 [20366] libc: Compilation errors in installed headers in strict-compliance
2066 [20370] malloc: malloc: Arena free list management is still racy
2067 (incorrect fix in bug 19243)
2068 [20386] libc: assert (X = 0) does not result in GCC warning
2069 [20432] malloc: malloc: Minimize interface required for interposition
2070 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2071 in _Unwind_Backtrace (CVE-2016-6323)
2072 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2073 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2075 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2076 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2077 [20477] network: resolv: incorrect double-checked locking related to
2079 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2081 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2083 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2084 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2085 cause transition penalty
2086 [20517] math: sparcv9 missing fdiml compat symbol
2087 [20524] manual: strverscmp is inconsistent
2088 [20525] libc: <sys/quota.h> should be based on kernel headers
2089 [20539] math: GCC 7 -static -lm fails to link at -O3
2090 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2092 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2094 [20591] network: Remove obsolete DNSSEC support
2095 [20592] network: DNS resource record type classification macros in
2096 <arpa/nameser.h> are incorrect
2097 [20593] network: Update DNS RR type definitions
2098 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2099 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2101 [20629] network: libresolv: Remove support for bitstring labels
2103 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2104 assertion: "maxidx >= 2"
2105 [20660] math: [arm] Use VSQRT
2106 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2107 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2108 [20689] libc: Test for FMA should also check for AVX.
2109 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2110 [20715] math: iszero macro breaks existing code
2111 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2112 [20728] libc: powerpc: Missing TOC stub in clone
2113 [20729] build: glibc-2.24 fails to build for i486 with -Os
2114 [20750] build: Build fails with default PIE enabled gcc-6.x
2115 [20768] math: [alpha] sqrt fegetenv namespace
2116 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2118 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2119 __FLT_EVAL_METHOD__ is 2
2120 [20790] network: rpcgen buffer overrun in get_prog_declaration
2121 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2122 [20829] libc: crypt snprintf namespace
2123 [20847] libc: tst-vfork3 failure
2124 [20855] math: Default bits/mathdef.h has inappropriate float_t
2125 [20859] math: [sh4] FP_ILOGB0 invalid
2126 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2127 U+20AC), not same as GBK
2128 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2129 [20916] math: pow handling of sNaN arguments
2130 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2131 [20919] math: Bad pow (qNaN, 0) result with -lieee
2132 [20940] math: hypot sNaN handling
2133 [20947] math: fmax, fmin sNaN handling
2134 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2135 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2137 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2138 [20973] nptl: robust mutexes: Lost wake-ups
2139 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2140 [20978] nis: strlen on null pointer in nss_nisplus
2141 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2143 [21014] string: i686 memchr overflows internal pointer check
2144 [21019] libc: [mips] n32 lseek incorrect on overflow
2145 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2146 [21026] libc: [MIPS] readahead syscall is broken on n64
2147 [21028] math: Fallback fesetexceptflag should always succeed
2148 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2149 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2151 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2152 [21061] librt: [microblaze] librt lost clock_* exports
2153 [21073] libc: tunables: insecure environment variables passed to
2154 subprocesses with AT_SECURE
2155 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2159 * The minimum Linux kernel version that this version of the GNU C Library
2160 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2161 kernel version 2.6.32 or later suffices (on architectures that already
2162 required kernel versions more recent than 3.2, those requirements remain
2163 unchanged). Linux 3.2 or later kernel headers are required on all
2166 * The pap_AN locale has been deleted. This has been deprecated for a long
2167 time. It has been replaced by pap_AW & pap_CW, both of which have long
2168 been included in previous releases.
2170 * The readdir_r and readdir64_r functions have been deprecated. It is
2171 recommended to use readdir and readdir64 instead.
2173 * The type “union wait” has been removed. It was deprecated in the early
2174 1990s and never part of POSIX. Application code should use the int type
2175 instead of “union wait”.
2177 * A new NSS action is added to facilitate large distributed system
2178 administration. The action, MERGE, allows remote user stores like LDAP
2179 to be merged into local user stores like /etc/groups in order to provide
2180 easy to use, updated, and managed sets of merged credentials. The new
2181 action can be used by configuring it in /etc/nsswitch.conf:
2182 group: files [SUCCESS=merge] nis
2183 Implemented by Stephen Gallagher (Red Hat).
2185 * The deprecated __malloc_initialize_hook variable has been removed from the
2188 * The long unused localedef --old-style option has been removed. It hasn't
2189 done anything in over 16 years. Scripts using this option can safely
2192 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2193 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2194 return the next representable value in the direction of positive infinity
2195 and the nextdown functions return the next representable value in the
2196 direction of negative infinity. These are currently enabled as GNU
2199 Security related changes:
2201 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2202 could result in a stack overflow when getnetbyname was called with an
2203 overly long name. (CVE-2016-3075)
2205 * Previously, getaddrinfo copied large amounts of address data to the stack,
2206 even after the fix for CVE-2013-4458 has been applied, potentially
2207 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2208 instead. Reported by Michael Petlan. (CVE-2016-3706)
2210 * The glob function suffered from a stack-based buffer overflow when it was
2211 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2212 Reported by Alexander Cherepanov. (CVE-2016-1234)
2214 * The Sun RPC UDP client could exhaust all available stack space when
2215 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2216 alloca plugin for GCC. (CVE-2016-4429)
2218 * The IPv6 name server management code in libresolv could result in a memory
2219 leak for each thread which is created, performs a failing naming lookup,
2220 and exits. Over time, this could result in a denial of service due to
2221 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2223 The following bugs are resolved with this release:
2225 [1170] localedata: ne_NP: update Nepali locale definition file
2226 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2228 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2229 [6796] math: fdim() does not set errno on overflow
2230 [10354] libc: posix_spawn should use vfork() in more cases than presently
2231 [11213] localedata: localedata: add copyright disclaimer to locale files
2232 [12143] localedata: chr_US: new Cherokee locale
2233 [12450] localedata: sgs_LT: new locale
2234 [12676] localedata: ln_CD: new locale
2235 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2237 [13304] math: fma, fmaf, fmal produce wrong results
2238 [14259] build: --localedir arg to configure is ignored
2239 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2240 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2241 [14934] localedata: es_CL: wrong first weekday chilean locale
2242 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2244 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2246 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2247 [15368] nptl: raise() is not async-signal-safe
2248 [15479] math: ceil, floor, round and trunc raise inexact exception
2249 [15578] localedata: kk_KZ: various updates
2250 [16003] localedata: pap_AN: punt old locale
2251 [16137] localedata: iw_IL: punt old locale
2252 [16190] localedata: eo: new esperanto locale
2253 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2254 [16742] malloc: race condition: pthread_atfork() called before first
2255 malloc() results in unexpected locking behaviour/deadlocks
2256 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2258 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2259 [17565] localedata: pt_PT: wrong (work-)week start
2260 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2261 [17950] build: Build fails with -msse
2262 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2263 [18433] libc: posix_spawn does not return correctly upon failure to
2265 [18453] localedata: charmaps/IBM875: incorrect codes
2266 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2268 [18896] localedata: he_IL: improvements for currency
2269 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2270 Romanian locale data
2271 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2273 [19056] libc: Deprecate readdir_r
2274 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2276 [19198] localedata: nl_NL: small improvements for Dutch locales
2277 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2278 nameservers (CVE-2016-5417)
2279 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2281 [19400] locale: Language missing in "iso-639.def", trivial fix in
2283 [19431] malloc: Deadlock between fflush, getdelim, and fork
2284 [19505] libc: Incorrect file descriptor validity checks in
2285 posix_spawn_file_actions_add{open,close,dup2}
2286 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2287 when using RTLD_NEXT
2288 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2289 `intl/{gettextP,loadinfo}.h'
2290 [19534] libc: execle, execlp may use malloc
2291 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2292 [19573] network: res_nclose and __res_maybe_init disagree about name
2293 server initialization, breaking Hesiod
2294 [19575] localedata: Status of GB18030 tables
2295 [19581] localedata: sr_* date_fmt string contains additional newline
2296 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2298 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2299 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2300 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2301 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2303 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2305 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2307 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2308 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2309 [19633] locale: strfmon_l applies global locale to number formatting
2310 [19642] network: Memory leak in getnameinfo
2311 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2312 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2314 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2315 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2317 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2318 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2320 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2322 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2324 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2325 pointers and lengths in error-case.
2326 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2327 report errors on UTF-16 surrogates values.
2328 [19755] nscd: nscd assertion failure in gc
2329 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2330 [19759] libc: mempcpy shouldn't be inlined
2331 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2332 [19765] libc: s390 needs an optimized mempcpy
2333 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2334 NAME_MAX limit assumption (CVE-2016-1234)
2335 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2336 [19787] network: Missing and incorrect truncation checks in getnameinfo
2337 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2339 [19791] network: Assertion failure in res_query.c with un-connectable name
2341 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2342 [19822] math: libm.so install clobbers old version
2343 [19825] network: resolv: send_vc can return uninitialized data in second
2344 response to getaddrinfo
2345 [19830] network: nss_dns: should check RDATA length against buffer length
2346 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2347 confronted with A/AAAA records of invalid size
2348 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2349 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2350 [19853] stdio: Printing IBM long double in decimal with high precision is
2352 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2353 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2354 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2356 [19865] network: Assertion failure or memory leak in
2357 _nss_dns_getcanonname_r
2358 [19868] network: nss_dns: netent code does not skip over non-PTR records
2359 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2361 [19881] string: Improve x86-64 memset
2362 [19907] string: Incorrect memcpy tests
2363 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2365 [19925] libc: termios.h XCASE namespace
2366 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2367 [19929] libc: limits.h NL_NMAX namespace
2368 [19931] stdio: Memory leak in vfprintf
2369 [19957] libc: clone(CLONE_VM) access invalid parent memory
2370 [19963] localedata: en_IL: New locale
2371 [19989] stdio: stdio.h cuserid namespace
2372 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2374 [19996] locale: langinfo.h nl_langinfo_l namespace
2375 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2376 [20010] network: getaddrinfo: Stack overflow in hostent translation
2378 [20012] stdio: libio: fmemopen append mode failure
2379 [20014] stdio: stdio.h namespace for pre-threads POSIX
2380 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2381 [20023] libc: fcntl.h timespec namespace
2382 [20024] math: [x86_64] vectorized sincos trashes the stack
2383 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2384 [20041] time: sys/time.h timespec namespace
2385 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2386 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2387 [20051] libc: ttyslot in wrong header under wrong conditions
2388 [20054] libc: gethostname not declared for XPG4
2389 [20055] libc: termios.h missing tcgetsid for XPG4
2390 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2392 [20073] libc: sys/stat.h fchmod namespace
2393 [20074] libc: stdlib.h rand_r namespace
2394 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2395 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2397 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2398 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2400 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2401 [20119] libc: Wrong mask for processors level type from CPUID
2402 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2403 AS not supporting AVX512
2404 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2406 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2407 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2409 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2410 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2411 [20178] libc: posix_spawn{p} should not call exit
2412 [20191] stdio: libio: vtables hardening
2413 [20195] string: FMA4 detection requires CPUID execution with register
2415 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2416 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2418 [20212] math: acos (sNaN) returns sNaN
2419 [20213] math: asin (sNaN) returns sNaN
2420 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2421 [20218] math: [i386] asinhl (sNaN) returns sNaN
2422 [20219] math: [i386] atanhl (sNaN) returns sNaN
2423 [20222] stdio: fopencookie: Mangle function pointers
2424 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2425 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2426 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2428 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2429 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2430 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2431 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2432 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2433 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2434 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2435 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2436 [20240] math: modf (sNaN) returns sNaN
2437 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2438 [20250] math: frexp (sNaN) returns sNaN
2439 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2440 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2442 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2443 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2444 subscript is below array bounds [-Werror=array-bounds]
2445 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2446 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2448 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2449 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2451 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2452 "invalid" exceptions
2453 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2454 [20316] localedata: id_ID: Februari instead of Pebruari
2455 [20327] string: POWER8 strcasecmp returns incorrect result
2456 [20347] math: Failure: Test: j0_downward (0xap+0)
2457 [20348] libc: FAIL: misc/tst-preadvwritev64
2458 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2459 [20350] libc: There is no test for p{read,write}64
2460 [20357] math: Incorrect cos result for 1.5174239687223976
2461 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2465 * Unicode 8.0.0 Support: Character encoding, character type info, and
2466 transliteration tables are all updated to Unicode 8.0.0, using new
2467 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2468 These updates cause user visible changes, such as the fixes for bugs
2469 89, 16061, and 18568.
2471 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2472 kernel-internal CPU set size. This means that requests that change the
2473 CPU affinity which failed before (for example, an all-ones CPU mask) will
2474 now succeed. Applications that need to determine the effective CPU
2475 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2476 setting it because the kernel can adjust it (and the previous size check
2477 would not detect this in the majority of cases).
2479 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2480 the following new symbols are used: fts64_children, fts64_close,
2481 fts64_open, fts64_read and fts64_set.
2483 * getaddrinfo now detects certain invalid responses on an internal netlink
2484 socket. If such responses are received, an affected process will
2485 terminate with an error message of "Unexpected error <number> on netlink
2486 descriptor <number>" or "Unexpected netlink response of size <number> on
2487 descriptor <number>". The most likely cause for these errors is a
2488 multi-threaded application which erroneously closes and reuses the netlink
2489 file descriptor while it is used by getaddrinfo.
2491 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2492 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2493 unnecessary serialization of memory allocation requests across threads.
2494 The defect is now corrected. Users should see a substantial increase in
2495 the concurent throughput of allocation requests for applications which
2496 trigger this bug. Affected applications typically create and
2497 destroy threads frequently. (Bug 19048 was reported and analyzed by
2500 * There is now a --disable-timezone-tools configure option for disabling the
2501 building and installing of the timezone related utilities (zic, zdump, and
2502 tzselect). This is useful for people who build the timezone data and code
2503 independent of the GNU C Library.
2505 * The obsolete header <regexp.h> has been removed. Programs that require
2506 this header must be updated to use <regex.h> instead.
2508 * The obsolete functions bdflush, create_module, get_kernel_syms,
2509 query_module and uselib are no longer available to newly linked binaries;
2510 the header <sys/kdaemon.h> has been removed. These functions and header
2511 were specific to systems using the Linux kernel and could not usefully be
2512 used with the GNU C Library on systems with version 2.6 or later of the
2515 * Optimized string, wcsmbs and memory functions for IBM z13.
2516 Implemented by Stefan Liebler.
2518 * Newly linked programs that define a variable called signgam will no longer
2519 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2520 require signgam to be set by those functions must ensure that they use the
2521 variable provided by the GNU C Library and declared in <math.h>, without
2522 defining their own copy.
2524 * The minimum GCC version that can be used to build this version of the GNU
2525 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2526 still be used to compile programs using the GNU C Library.
2528 Security related changes:
2530 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2531 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2533 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2534 the pointer guard feature. It is always enabled. Previously,
2535 LD_POINTER_GUARD could be used to disable security hardening in binaries
2536 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2539 * An integer overflow in hcreate and hcreate_r could lead to an
2540 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2542 * The catopen function no longer has unbounded stack usage. Reported by
2543 Max. (CVE-2015-8779)
2545 * The nan, nanf and nanl functions no longer have unbounded stack usage
2546 depending on the length of the string passed as an argument to the
2547 functions. Reported by Joseph Myers. (CVE-2014-9761)
2549 * A stack-based buffer overflow was found in libresolv when invoked from
2550 libnss_dns, allowing specially crafted DNS responses to seize control
2551 of execution flow in the DNS client. The buffer overflow occurs in
2552 the functions send_dg (send datagram) and send_vc (send TCP) for the
2553 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2554 family. The use of AF_UNSPEC triggers the low-level resolver code to
2555 send out two parallel queries for A and AAAA. A mismanagement of the
2556 buffers used for those queries could result in the response of a query
2557 writing beyond the alloca allocated buffer created by
2558 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2559 the overflow. Thanks to the Google Security Team and Red Hat for
2560 reporting the security impact of this issue, and Robert Holiday of
2561 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2563 The following bugs are resolved with this release:
2565 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2566 [887] math: Math library function "logb" and "nextafter" inconsistent
2567 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2568 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2569 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2570 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2572 [4404] localedata: German translation of "Alarm clock" is misleading
2573 [6799] math: nextafter() and nexttoward() doen't set errno on
2574 overflow/underflow errors
2575 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2577 [10432] nis: _nss_nis_setnetgrent assertion failure
2578 [11460] libc: fts has no LFS support
2579 [12926] network: getaddrinfo()/make_request() may spin forever
2580 [13065] nptl: Race condition in pthread barriers
2581 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2582 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2584 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2585 [14912] libc: Rename non-installed bits/*.h headers
2586 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2587 [15367] math: Let gcc use __builtin_isinf
2588 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2589 [15421] math: lgamma wrongly sets signgam for ISO C
2590 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2591 FE_INVALID with argument out of range
2592 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2594 [15786] dynamic-link: ifunc resolver functions can smash function
2596 [15918] math: Unnecessary check for equality in hypotf()
2597 [16061] localedata: Review / update transliteration data
2598 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2600 [16141] time: strptime %z offset restriction
2601 [16171] math: drem should be alias of remainder
2602 [16296] math: fegetround is pure?
2603 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2604 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2606 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2607 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2609 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2610 "Exception "Inexact" set" on ppc32
2611 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2612 [16517] math: Missing underflow exception from tanf/tan/tanl
2613 [16519] math: Missing underflow exception from sinhf
2614 [16520] math: Missing underflow exception from tanhf
2615 [16521] math: Missing underflow exception from exp2
2616 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2618 [16734] stdio: fopen calls mmap to allocate its buffer
2619 [16961] math: nan function incorrect handling of bad sequences
2620 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2621 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2622 [16985] locale: localedef: confusing error message when opening output
2624 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2625 [17197] locale: Redundant shift character in iconv conversion output at
2627 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2628 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2629 [17250] dynamic-link: static linking breaks nss loading
2630 (getaddrinfo/getpwnam/etc...)
2631 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2633 [17441] math: isnan() should use __builtin_isnan() in GCC
2634 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2635 (related to lock elision)
2636 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2637 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2638 [17887] time: strptime should be able to parse "+01:00" style timezones
2639 [17905] libc: catopen() Multiple unbounded stack allocations
2641 [18084] libc: backtrace (..., 0) dumps core on x86
2642 [18086] libc: nice() sets errno to 0 on success
2643 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2644 is too large (CVE-2015-8778)
2645 [18251] dynamic-link: SONAME missing when audit modules provides path
2646 [18265] libc: add attributes for wchar string and memory functions
2647 [18370] math: csqrt missing underflows
2648 [18421] libc: [hppa] read-only segment has dynamic relocations
2649 [18472] libc: Obsolete syscall wrappers should be compat symbols
2650 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2651 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2652 [18525] localedata: Remove locale timezone information
2653 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2654 [18568] localedata: Update locale data to Unicode 8.0
2655 [18589] locale: sort-test.sh fails at random
2656 [18595] math: ctan, ctanh missing underflows
2657 [18604] libc: assert macro-expands its argument
2658 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2659 contains a vector instruction exception.
2660 [18611] math: j1, jn missing errno setting on underflow
2661 [18618] localedata: sync Chechen locale definitions with other *_RU
2663 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2664 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2665 [18665] network: In send_dg, the recvfrom function is NOT always using the
2666 buffer size of a newly created buffer (CVE-2015-7547)
2667 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2669 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2671 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2672 [18699] math: tilegx cproj() for various complex infinities does not yield
2674 [18724] libc: Harden put*ent functions against data injection
2675 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2676 [18755] build: build errors with -DNDEBUG
2677 [18757] stdio: fmemopen fails to set errno on failure
2678 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2680 [18781] libc: openat64 lacks O_LARGEFILE
2681 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2682 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2683 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2684 [18790] math: [ldbl-128ibm] tanhl inaccurate
2685 [18795] libc: stpncpy fortification misses buffer lengths that are
2686 statically too large
2687 [18796] build: build fails for --disable-mathvec
2688 [18803] math: hypot missing underflows
2689 [18820] stdio: fmemopen may leak memory on failure
2690 [18823] math: csqrt spurious underflows
2691 [18824] math: fma spurious underflows
2692 [18825] math: pow missing underflows
2693 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2694 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2695 [18870] build: sem_open.c fails to compile with missing symbol
2697 [18872] stdio: Fix memory leak in printf_positional
2698 [18873] libc: posix_fallocate overflow check ineffective
2699 [18875] math: Excess precision leads incorrect libm
2700 [18877] libc: arm: mmap offset regression
2701 [18887] libc: memory corruption when using getmntent on blank lines
2702 [18918] localedata: hu_HU: change time to HH:MM:SS format
2703 [18921] libc: Regression: extraneous stat() and fstat() performed by
2705 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2706 binaries (CVE-2015-8777)
2707 [18951] math: tgamma missing underflows
2708 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2710 [18953] localedata: lt_LT: change currency symbol to the euro
2711 [18956] math: powf inaccuracy
2712 [18961] math: [i386] exp missing underflows
2713 [18966] math: [i386] exp10 missing underflows
2714 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2715 [18969] build: multiple string test failures due to missing locale
2717 [18970] libc: Reference of pthread_setcancelstate in libc.a
2718 [18977] math: float / long double Bessel functions not in XSI POSIX
2719 [18980] math: i386 libm functions return with excess range and precision
2720 [18981] math: i386 scalb*, ldexp return with excess range and precision
2721 [18982] stdio: va_list and vprintf
2722 [18985] time: Passing out of range data to strftime() causes a segfault
2724 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2725 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2726 [19012] locale: iconv_open leaks memory on error path
2727 [19016] math: clog, clog10 inaccuracy
2728 [19018] nptl: Mangle function pointers in tls_dtor_list
2729 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2730 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2731 [19048] malloc: malloc: arena free list can become cyclic, increasing
2733 [19049] math: [powerpc] erfc incorrect zero sign
2734 [19050] math: [powerpc] log* incorrect zero sign
2735 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2736 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2737 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2738 [19074] network: Data race in _res_hconf_reorder_addrs
2739 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2740 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2741 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2743 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2745 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2746 [19086] manual: posix_fallocate64 documented argument order is wrong.
2747 [19088] math: lround, llround missing exceptions close to overflow
2749 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2750 [19095] math: dbl-64 lrint incorrect for 64-bit long
2751 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2752 [19124] dynamic-link: ld.so failed to build with older assmebler
2753 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2754 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2755 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2756 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2757 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2758 pthread_setaffinity_np
2759 [19156] math: [ldbl-128] j0l spurious underflows
2760 [19164] nptl: tst-getcpu fails with many possible CPUs
2761 [19168] math: math/test-ildoubl and math/test-ldouble failure
2762 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2763 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2765 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2766 (FE_NOMASK_ENV) do not clear SSE exceptions
2767 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2768 _int_new_arena/reused_arena
2769 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2770 [19201] math: dbl-64 remainder incorrect sign of zero result
2771 [19205] math: bits/math-finite.h conditions do not match math.h and
2773 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2774 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2775 for C99-based standards
2776 [19212] libc: features.h not -Wundef clean
2777 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2779 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2780 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2781 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2783 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2784 "inexact" exceptions
2785 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2787 [19242] libc: strtol incorrect in Turkish locales
2788 [19243] malloc: reused_arena can pick an arena on the free list, leading
2789 to an assertion failure and reference count corruption
2790 [19253] time: tzset() ineffective when temporary TZ did not include DST
2792 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2793 [19270] math: [hppa] Shared libm missing __isnanl
2794 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2795 MAP_HUGETLB and MAP_STACK defines
2796 [19313] nptl: Wrong __cpu_mask for x32
2797 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2798 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2799 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2800 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2801 [19363] time: x32: times() return value wrongly truncates/sign extends
2803 [19367] dynamic-link: Improve branch prediction on Silvermont
2804 [19369] network: Default domain name not reset by res_ninit when "search"
2805 / "domain" entry is removed from resolv.conf
2806 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2808 [19385] localedata: bg_BG: time separator should be colon, not comma
2809 [19408] libc: linux personality syscall wrapper may erroneously return an
2810 error on 32-bit architectures
2811 [19415] libc: dladdr returns wrong names on hppa
2812 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2813 IBM905, IBM907, and IBM909
2814 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2815 [19443] build: build failures with -DDEBUG
2816 [19451] build: Make check fails on test-double-vlen2
2817 [19462] libc: Glibc failed to build with -Os
2818 [19465] math: Wrong code with -Os
2819 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2821 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2823 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2824 [19486] math: S390: Math tests fail with "Exception Inexact set".
2825 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2826 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2828 [19590] math: Fail to build shared objects that use libmvec.so functions.
2832 * The following bugs are resolved with this release:
2834 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2835 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2836 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2837 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2838 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2839 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2840 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2841 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2842 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2843 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2844 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2845 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2846 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2847 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2848 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2849 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2850 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2851 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2852 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2853 18657, 18676, 18694, 18696, 18887.
2855 * Cache information can be queried via sysconf() function on s390 e.g. with
2856 _SC_LEVEL1_ICACHE_SIZE as argument.
2858 * A buffer overflow in gethostbyname_r and related functions performing DNS
2859 requests has been fixed. If the NSS functions were called with a
2860 misaligned buffer, the buffer length change due to pointer alignment was
2861 not taken into account. This could result in application crashes or,
2862 potentially arbitrary code execution, using crafted, but syntactically
2863 valid DNS responses. (CVE-2015-1781)
2865 * The time zone file parser has been made more robust against crafted time
2866 zone files, avoiding heap buffer overflows related to the processing of
2867 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2868 large time zone data files. Overly long time zone specifiers in the TZ
2869 variable no longer result in stack overflows and crashes.
2871 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2872 for LD and GD on x86 and x86-64, has been implemented. You will need
2873 binutils-2.24 or later to enable this optimization.
2875 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2876 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2877 Hat). These updates cause user visible changes, such as the fix for bug
2880 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2881 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2882 condition in some applications.
2884 * Added vector math library named libmvec with the following vectorized x86_64
2885 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2887 The library can be disabled with --disable-mathvec. Use of the functions is
2888 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2889 Shared library libmvec.so is linked in as needed when using -lm (no need to
2890 specify -lmvec explicitly for not static builds).
2891 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2893 * A new fmemopen implementation has been added with the goal of POSIX
2894 compliance. The new implementation fixes the following long-standing
2895 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2896 old implementation is still present for use be by existing binaries.
2898 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2899 releases. It has been fixed to match 2.19 and older, but binaries built
2900 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2902 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2903 Contributed by Roland McGrath (Google).
2905 * The header <regexp.h> is deprecated, and will be removed in a future
2906 release. Use of this header will trigger a deprecation warning.
2907 Application developers should update their code to use <regex.h> instead.
2909 This header was formerly part of SUS, but was deprecated in 1994 and
2910 removed from the standard in 2001. Also, the glibc implementation
2911 leaks memory. See BZ#18681 for more details.
2915 * The following bugs are resolved with this release:
2917 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2918 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2919 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2920 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2921 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2922 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2923 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2924 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2925 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2926 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2929 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2930 too little memory for the to-be-scanned arguments and overflow the
2931 allocated buffer. The implementation now correctly computes the required
2932 buffer size when using malloc, and switches to malloc from alloca as
2935 * A new semaphore algorithm has been implemented in generic C code for all
2936 machines. Previous custom assembly implementations of semaphore were
2937 difficult to reason about or ensure that they were safe. The new version
2938 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2939 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2940 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2942 * Port to Altera Nios II has been contributed by Mentor Graphics.
2944 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2945 implementations for powerpc64/powerpc64le.
2946 Implemented by Adhemerval Zanella (IBM).
2948 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2949 and powerpc64le. This may improve lock scaling of existing programs on
2950 HTM capable systems. The lock elision code is only enabled with
2951 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2952 powerpc will issue a transaction abort on every syscall to avoid side
2953 effects being visible outside transactions.
2955 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2956 AArch64. Contributed by ARM Ltd.
2958 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2960 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2961 under certain input conditions resulting in the execution of a shell for
2962 command substitution when the application did not request it. The
2963 implementation now checks WRDE_NOCMD immediately before executing the
2964 shell and returns the error WRDE_CMDSUB as expected.
2966 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2967 processing format strings with a large number of format specifiers.
2969 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2970 infinite loop if the DNS response contained a PTR record of an unexpected
2973 * The minimum GCC version that can be used to build this version of the GNU
2974 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2975 still be used to compile programs using the GNU C Library.
2977 * The GNU C Library is now built with -Werror by default. This can be
2978 disabled by configuring with --disable-werror.
2980 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2982 * The obsolete sigvec function has been removed. This was the original
2983 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2984 programs have been using instead for about 25 years. Of course, ABI
2985 compatibility for old binaries using sigvec remains intact.
2987 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2988 with newer versions of bison.
2990 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2991 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2992 registers overlay two consecutive single-precision registers. MIPS32R2
2993 introduced a new FPU mode (FR=1) where double-precision registers extend the
2994 corresponding single-precision registers which is incompatible with the
2995 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2996 require the use of FR=1 making a transition necessary. New o32 ABI
2997 extensions enable users to migrate over time from the original o32 ABI
2998 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2999 tracks the ABI of any loaded object and verifies that new objects are
3000 compatible. Mode transitions will also be requested as required and
3001 unsupportable objects will be rejected. The ABI checks include both soft and
3002 hard float ABIs for o32, n32 and n64.
3004 GCC 5 with GNU binutils 2.25 onwards:
3005 It is strongly recommended that all o32 system libraries are built using the
3006 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
3007 with the original and all new o32 ABI extensions. Configure a MIPS GCC
3008 compiler using --with-fp-32=xx to set this by default.
3012 * The following bugs are resolved with this release:
3014 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
3015 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
3016 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
3017 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
3018 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
3019 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
3020 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
3021 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
3022 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
3023 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
3024 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
3025 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
3026 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
3027 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
3028 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
3030 * Reverted change of ABI data structures for s390 and s390x:
3031 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
3032 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
3033 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
3034 are preserved pointing straight to the same implementation as the old ones.
3035 Given that, new callers will simply provide a too-big buffer to these
3036 functions. Any applications/libraries out there that embed jmp_buf or
3037 ucontext_t in an ABI-relevant data structure that have already been rebuilt
3038 against 2.19 headers will have to rebuilt again. This is necessary in any
3039 case to revert the breakage in their ABI caused by the glibc change.
3041 * Support for file description locks is added to systems running the
3042 Linux kernel. The standard file locking interfaces are extended to
3043 operate on file descriptions, not file descriptors, via the use of
3044 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
3045 are associated with an open file instead of a process.
3047 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
3049 * The minimum Linux kernel version that this version of the GNU C Library
3050 can be used with is 2.6.32.
3052 * Running the testsuite no longer terminates as soon as a test fails.
3053 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
3054 with PASS or FAIL lines for individual tests. A summary of the results is
3055 printed, including a list of failing lists, and "make check" exits with
3056 error status if there were any unexpected failures. "make check
3057 stop-on-test-failure=y" may be used to keep the old behavior.
3059 * The am33 port, which had not worked for several years, has been removed
3062 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3063 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3064 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3065 conflicted with POSIX (support for which was removed in 2.19), the
3066 interfaces those macros enabled remain available when compiling with
3067 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3068 test macros defined.
3070 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3072 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3073 This may improve lock scaling of existing programs on TX capable systems.
3074 The lock elision code is only built with --enable-lock-elision=yes and
3075 then requires a GCC version supporting the TX builtins. With lock elision
3076 default mutexes are elided via __builtin_tbegin, if the cpu supports
3077 transactions. By default lock elision is not enabled and the elision code
3080 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3081 copy the path argument. This allowed programs to cause posix_spawn to
3082 deference a dangling pointer, or use an unexpected pathname argument if
3083 the string was modified after the posix_spawn_file_actions_addopen
3086 * All supported architectures now use the main glibc sysdeps directory
3087 instead of some being in a separate "ports" directory (which was
3088 distributed separately before glibc 2.17).
3090 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3091 On configurations that support it (all Linux configurations), it's now
3092 used regardless of the --enable-add-ons switch to configure. It is no
3093 longer possible to build such configurations without pthreads support.
3095 * Locale names, including those obtained from environment variables (LANG
3096 and the LC_* variables), are more tightly checked for proper syntax.
3097 setlocale will now fail (with EINVAL) for locale names that are overly
3098 long, contain slashes without starting with a slash, or contain ".." path
3099 components. (CVE-2014-0475) Previously, some valid locale names were
3100 silently replaced with the "C" locale when running in AT_SECURE mode
3101 (e.g., in a SUID program). This is no longer necessary because of the
3104 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3105 with application code using Intel MPX instructions. (With all previous
3106 versions, the MPX register state could be clobbered when making calls
3107 into or out of a shared library.) Note that while the new dynamic
3108 linker is compatible with all known x86 hardware whether or not it
3109 supports Intel MPX, some x86 instruction-set emulators might fail to
3110 handle the new instruction encodings. This is known to affect Valgrind
3111 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3112 release), and might affect other tools that do instruction emulation.
3114 * Support for loadable gconv transliteration modules has been removed.
3115 The support for transliteration modules has been non-functional for
3116 over a decade, and the removal is prompted by security defects. The
3117 normal gconv conversion modules are still supported. Transliteration
3118 with //TRANSLIT is still possible, and the //IGNORE specifier
3119 continues to be supported. (CVE-2014-5119)
3121 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3122 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3123 resulting a denial-of-service security vulnerability in applications which
3124 use functions related to iconv. (CVE-2014-6040)
3128 * The following bugs are resolved with this release:
3130 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3131 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3132 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3133 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3134 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3135 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3136 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3137 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3138 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3139 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3140 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3141 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3142 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3143 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3144 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3145 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3146 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3147 16431, 16453, 16474, 16506, 16510, 16529
3149 * Slovenian translations for glibc messages have been contributed by the
3150 Translation Project's Slovenian team of translators.
3152 * The public headers no longer use __unused nor __block. This change is to
3153 support compiling programs that are derived from BSD sources and use
3154 __unused internally, and to support compiling with Clang's -fblock
3155 extension which uses __block.
3157 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3158 large collation sequences to optimize multiple passes. This cache
3159 computation may overflow for large collation sequences and may cause a
3160 stack or buffer overflow. This is now fixed to use a slower algorithm
3161 which does not use a cache if there is an integer overflow.
3163 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3164 rules for large collation sequences to optimize multiple passes and falls
3165 back to alloca if malloc fails, resulting in a possible stack overflow.
3166 The implementation now falls back to an uncached collation sequence lookup
3169 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3170 initialized for static applications resulting in the security feature
3171 being disabled. The pointer guard is now correctly initialized to a
3172 random value for static applications. Existing static applications need
3173 to be recompiled to take advantage of the fix (bug 15754).
3175 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3176 to the d_name member of struct dirent, or omit the terminating NUL
3177 character. (Bugzilla #14699).
3179 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3180 aligned_alloc functions could allocate too few bytes or corrupt the
3181 heap when passed very large allocation size values (Bugzilla #15855,
3184 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3185 for AF_INET6 has been fixed (Bugzilla #16072).
3187 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3188 pap_CW, quz_PE, the_NP.
3190 * Substantially revised locales: gd_GB, ht_HT
3192 * The LC_ADDRESS field was updated to support country_car for almost all
3195 * ISO 1427 definitions were updated.
3197 * ISO 3166 definitions were updated.
3199 * The localedef utility now supports --big-endian and --little-endian
3200 command-line options to generate locales for a different system from that
3201 for which the C library was built.
3203 * Binary locale files now only depend on the endianness of the system for
3204 which they are generated and not on other properties of that system. As a
3205 consequence, binary files generated with new localedef may be incompatible
3206 with old versions of the GNU C Library, and binary files generated with
3207 old localedef may be incompatible with this version of the GNU C Library,
3208 in the following circumstances:
3210 + Locale files may be incompatible on m68k systems.
3212 + Locale archive files (but not separate files for individual locales) may
3213 be incompatible on systems where plain "char" is signed.
3215 * The configure option --disable-versioning has been removed. Builds with
3216 --disable-versioning had not worked for several years.
3218 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3219 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3221 * SystemTap probes for malloc have been introduced.
3223 * SystemTap probes for slow multiple precision fallback paths of
3224 transcendental functions have been introduced.
3226 * Support for powerpc64le has been added.
3228 * The soft-float powerpc port now supports e500 processors.
3230 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3232 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3233 set of header declarations that are enabled by default, even when other
3234 feature test macros or compiler options such as -std=c99 would otherwise
3235 disable some of those declarations.
3237 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3238 conflict with POSIX. The libbsd-compat library (which was a dummy library
3239 that did nothing) has also been removed.
3241 * Preliminary documentation about Multi-Thread, Async-Signal and
3242 Async-Cancel Safety has been added.
3244 * Change of ABI data structures for s390 and s390x:
3245 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3246 allow for future hardware extensions. All library functions that accept or
3247 return these structures were versioned in order to provide backwards
3248 compatibility with existing code. However, not all cases can be handled
3249 with interface versioning. If an application embeds either structure into
3250 another structure and that structure is passed to another compilation unit
3251 which expects the newer larger-sized object then any access to the new
3252 fields will result in undefined behaviour. Similarly any access to fields
3253 that were moved by the enlarging of the structures will cause undefined
3254 behaviour. To fix the undefined behaviour all objects that are part of the
3255 final in-memory image must agree on the size of structures, and this may
3256 require recompilation.
3260 * The following bugs are resolved with this release:
3262 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3263 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3264 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3265 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3266 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3267 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3268 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3269 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3270 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3271 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3272 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3273 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3274 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3277 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3278 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3279 Distributions can re-enable building and using pt_chown via the new configure
3280 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3281 considerable security risks and should only be used if the distribution
3282 understands and accepts the risks.
3284 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3287 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3288 fixed (Bugzilla #15330).
3290 * Add support for calling C++11 thread_local object destructors on thread
3291 and program exit. This needs compiler support for offloading C++11
3292 destructor calls to glibc.
3294 * Improved worst case performance of libm functions with double inputs and
3297 * Support for priority inherited mutexes in pthread condition variables on
3298 non-x86 architectures.
3300 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3302 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3304 * Optimized string functions for ARM. Implemented by Will Newton and
3307 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3309 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3312 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3313 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3315 * Added a benchmark framework to track performance of functions in glibc.
3317 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3318 It is based on draft TS 18661 and currently enabled as a GNU extension.
3320 * On Linux, the clock function now uses the clock_gettime system call
3321 for improved precision, rather than old times system call.
3323 * Added support for version-3 tz format files. This is needed when using
3324 the tz database release 2013e or later, and affects a few unusual cases --
3325 currently only TZ='America/Godthab' for time stamps after 2037.
3327 * Added new API functions pthread_getattr_default_np and
3328 pthread_setattr_default_np to get and set the default pthread
3329 attributes of a process.
3331 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3332 This may improve lock scaling of existing programs on TSX capable systems.
3333 When the --enable-lock-elision=yes parameter is specified at configure
3334 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3337 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3338 availability). Implemented by Ryan S. Arnold.
3340 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3344 * The following bugs are resolved with this release:
3346 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3347 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3348 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3349 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3350 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3351 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3352 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3353 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3354 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3355 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3356 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3357 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3358 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3359 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3360 14879, 14889, 14893, 14898, 14914.
3362 * Optimization of memcpy for MIPS.
3364 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3365 EMFILE has been fixed (Bugzilla #14889).
3367 * The add-on ports collection is now distributed in the "ports" subdirectory
3368 of the main GNU C Library distribution, rather than separately.
3370 * Port to ARM AArch64 contributed by Linaro.
3372 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3373 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3375 Implemented by Andreas Krebbel.
3377 * The new function secure_getenv allows secure access to the environment,
3378 returning NULL if running in a SUID/SGID process. This function replaces
3379 the internal function __secure_getenv.
3381 * SystemTap static probes have been added into the dynamic linker.
3382 Implemented by Gary Benson.
3384 * Optimizations of string functions strstr, strcasestr and memmem.
3385 Implemented by Maxim Kuvyrkov.
3387 * The minimum Linux kernel version that this version of the GNU C Library
3388 can be used with is 2.6.16.
3390 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3391 powerpc POWER7. Implemented by Will Schmidt.
3393 * New configure option --disable-nscd builds the C library such that it
3394 never attempts to contact the Name Service Caching Daemon (nscd).
3395 New configure option --disable-build-nscd avoids building nscd itself;
3396 this is the default if --disable-nscd is used.
3398 * Improved support for cross-compilation, including cross-testing and
3399 bootstrap builds without a previously built glibc.
3401 * Several testsuite tests are now able to test multiple IFUNC variants of an
3402 interface, rather than just testing the one that would be chooen by
3405 * New configure options --with-bugurl and --with-pkgversion, for
3406 distributors to use to embed their bug-reporting and package version
3407 information in --help and --version output.
3409 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3410 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3411 allows creation of chroots without the procfs mounted on /proc.
3413 * The `crypt' function now fails if passed salt bytes that violate the
3414 specification for those values. On Linux, the `crypt' function will
3415 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3416 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3417 when the mode is enabled.
3419 * The `clock_*' suite of functions (declared in <time.h>) is now available
3420 directly in the main C library. Previously it was necessary to link with
3421 -lrt to use these functions. This change has the effect that a
3422 single-threaded program that uses a function such as `clock_gettime' (and
3423 is not linked with -lrt) will no longer implicitly load the pthreads
3424 library at runtime and so will not suffer the overheads associated with
3425 multi-thread support in other code such as the C++ runtime library.
3427 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3432 * The following bugs are resolved with this release:
3434 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3435 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3436 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3437 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3438 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3439 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3440 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3441 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3442 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3443 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3444 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3445 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3446 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3447 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3448 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3449 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3450 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3451 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3452 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3453 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3454 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3455 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3458 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3459 configuring glibc with:
3460 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3461 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3462 Implemented by H.J. Lu.
3466 + define static_assert
3468 + do not declare gets
3470 + declare at_quick_exit and quick_exit also for ISO C11
3472 + aligned_alloc. NB: The code is deliberately allows the size parameter
3473 to not be a multiple of the alignment. This is a moronic requirement
3474 in the standard but it is only a requirement on the caller, not the
3477 + timespec_get added
3479 + uchar.h support added
3481 + CMPLX, CMPLXF, CMPLXL added
3483 Implemented by Ulrich Drepper.
3485 * Support for the IA-64 has been moved to ports.
3487 * Remove support for anything but ELF binary format
3489 * Checking versions of poll, ppoll added.
3490 Implemented by Ulrich Drepper.
3492 * More generic and 64-bit performance optimizations to math functions.
3493 Implemented by Ulrich Drepper.
3495 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3496 headers and functions available at compile time as they were before
3497 version 2.14. This option will be removed at some time in the future
3498 after the TI-RPC library becomes fully sufficient for the needs of
3499 existing applications.
3501 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3502 Note that glibc is not expected to work with any Linux kernel version
3505 * New header <sys/auxv.h> and function getauxval allowing easy access to
3506 the AT_* key-value pairs passed from the Linux kernel. The header also
3507 defines the HWCAP_* bits associated with the AT_HWCAP key.
3509 * New locales: mag_IN
3511 * New configure option --enable-systemtap builds SystemTap static probes
3512 into libc for setjmp and longjmp and into libpthread for various operations.
3513 So far the setjmp/longjmp probes and some of the libpthread probes are
3514 provided only for i*86 and x86_64.
3515 Implemented by Roland McGrath and Rayson Ho.
3517 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3519 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3522 * More optimized functions for SPARC. Implemented by David S. Miller.
3524 * Improved support for cross-compilation, especially bootstrap builds
3525 without a previously built glibc.
3527 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3528 Chris Metcalf from Tilera.
3530 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3531 now supported for ARM processors.
3533 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3534 as the name of the dynamic linker, to distinguish it from the
3535 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3537 * Support for CRIS has been removed from ports.
3539 * A new class of installed header has been documented for low-level
3540 platform-specific functionality. PowerPC added the first instance with a
3541 function to provide time base register access. Contributed by Tulio
3542 Magno Quites Machado Filho.
3544 * ix86 configurations now install header files that are consistent with
3545 what x86-64 configurations install. These same header files can be used
3546 for -m32, -m64, or -mx32 builds.
3547 Contributed by H.J. Lu.
3549 * Math library bug fixes. A thorough audit of all open math library bugs was
3550 conducted by Joseph Myers. Significant progress was made on many math
3551 library bugs resulting in more accurate exceptions and function results.
3552 Many thanks to all those that contributed including Andreas Jaeger for his
3553 patch review and work on the x87 trigonometric instruction issues.
3555 * Timezone data is no longer installed. Timezone-related binaries and scripts
3556 will continue to be installed. Users should obtain their timezone data from
3557 their distribution provider or from the tzdata package at
3558 <ftp://munnari.oz.au/pub/>.
3562 * The following bugs are resolved with this release:
3564 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3565 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3566 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3567 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3568 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3569 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3570 13484, 13506, 13515, 13523, 13524, 13538, 13540
3572 * New program pldd to list loaded object of a process
3573 Implemented by Ulrich Drepper.
3575 * Add nss_db support back to glibc. No more dependency on Berkeley db
3576 and support for initgroups lookups.
3577 Implemented by Ulrich Drepper.
3579 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3580 Contributed by HJ Lu.
3582 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3583 Contributed by HJ Lu.
3585 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3586 on x86-32 and x86-64.
3587 Contributed by Liubov Dmitrieva.
3589 * Optimized strchr and strrchr for SSE on x86-32.
3590 Contributed by Liubov Dmitrieva.
3592 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3593 for x86-64 and x86-32.
3594 Contributed by Liubov Dmitrieva.
3596 * New interfaces: scandirat, scandirat64
3597 Implemented by Ulrich Drepper.
3599 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3600 Implemented by Ulrich Drepper.
3602 * nscd now also caches the netgroup database.
3603 Implemented by Ulrich Drepper.
3605 * Integrate libm with gcc's -ffinite-math-only option.
3606 Implemented by Ulrich Drepper.
3608 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3609 to math functions. Implemented by Ulrich Drepper.
3611 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3612 Implemented by Ulrich Drepper.
3614 * New Linux interfaces: process_vm_readv, process_vm_writev
3616 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3617 Implemented by Ulrich Drepper.
3619 * Optimized nearbyint and strcasecmp for PPC.
3620 Implemented by Adhemerval Zanella.
3622 * New locales: bho_IN, unm_US, es_CU, ta_LK
3626 * The following bugs are resolved with this release:
3628 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3629 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3630 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3631 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3632 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3633 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3634 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3635 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3636 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3637 12795, 12811, 12813, 12814, 12841
3639 * The RPC implementation in libc is obsoleted. Old programs keep working
3640 but new programs cannot be linked with the routines in libc anymore.
3641 Programs in need of RPC functionality must be linked against TI-RPC.
3642 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3644 Visible changes of this change include (obviously) the inability to link
3645 programs using RPC functions without referencing the TI-RPC library and the
3646 removal of the RPC headers from the glibc headers.
3647 Implemented by Ulrich Drepper.
3649 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3650 syncfs, setns, sendmmsg
3652 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3653 yue_HK, lij_IT, mhr_RU
3655 * New encodings: CP770, CP771, CP772, CP773, CP774
3657 * New program sotruss to trace calls through PLTs
3658 Implemented by Ulrich Drepper.
3660 * The malloc hook implementation is marked deprecated and will be removed
3661 from the default implementation in the next version. The design never
3662 worked ever since the introduction of threads. Even programs which do
3663 not create threads themselves can use multiple threads created internally.
3667 * The following bugs are resolved with this release:
3669 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3670 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3671 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3672 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3675 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3677 * POWER7 optimizations: memset, memcmp, strncmp
3679 * New optimized string functions for x86-64: strnlen (SSE2),
3680 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3681 Implemented by Ulrich Drepper.
3685 * The following bugs are resolved with this release:
3687 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3688 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3689 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3690 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3691 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3692 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3693 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3694 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3696 * New interfaces: pthread_getname_np, pthread_setname_np
3698 * New Linux interface: recvmmsg
3700 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3702 * The dynamic linker now recognizes supported ABI versions from the
3703 EI_ABIVERSION field in the ELF header.
3704 Implemented by Ulrich Drepper.
3706 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3707 will not be used to fill in password fields in the passwd.byname replies.
3708 Instead it is used to synthesize the shadow.byname table, should it be
3709 missing. This is a useful mode in some installations involving Solaris.
3710 Implemented by Ulrich Drepper.
3712 * New locales: kok_IN, sq_MK, cv_RU
3716 * The following bugs are resolved with this release:
3718 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3719 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3720 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3721 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3722 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3723 10789, 10817, 10823, 10840, 10847
3725 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3727 Implemented by Ulrich Drepper.
3729 * Checking version of longjmp added that fails if an uninitialized stack
3730 frame would be created. Implemented by Ulrich Drepper.
3732 * STT_GNU_IFUNC is now supported in static executables.
3733 Implemented by H.J. Lu.
3735 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3737 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3738 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3739 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3740 Contributed by H.J. Lu.
3742 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3743 Implemented by Ulrich Drepper.
3745 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3747 Contributed by H.J. Lu.
3749 * Support for fma instruction in AVX on x86-64.
3750 Implemented by H.J. Lu and Ulrich Drepper.
3752 * AVX support in x86-64 auditing support in ld.so.
3753 Implemented by H.J. Lu.
3755 * STB_GNU_UNIQUE support added.
3756 Implemented by Ulrich Drepper.
3758 * Implement second fallback mode for optimized DNS lookup for even more
3759 broken environments. If two requests from the same port are not
3760 handled correctly close the socket and open a new one before sending
3761 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3762 can be used to select this mode right away, instead of rediscovering the
3763 necessity is every process again.
3764 Implemented by Ulrich Drepper.
3766 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3767 Implemented by Adam Tkac.
3769 * Optimized iconv conversions for S390x.
3770 Implemented by Andreas Krebbel.
3772 * Using condvars with PI mutexes is now more efficient due to kernel
3773 support for requeueing to PI futexes. NPTL support added for x86-64.
3774 Implemented by Ulrich Drepper.
3776 * New locales: ps_AF, my_MM
3780 * The following bugs are resolved with this release:
3782 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3783 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3784 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3785 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3786 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3788 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3789 Implemented by Ulrich Drepper.
3791 * New Linux interfaces: accept4, fallocate, fallocate64.
3792 Implemented by Ulrich Drepper.
3794 * Correct declarations of string function when used in C++ code. This
3795 could lead to compile errors for invalid C++ code.
3797 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3800 * New POSIX 2008 interface: psiginfo
3801 Implemented by Ulrich Drepper.
3803 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3804 Implemented by Ulrich Drepper.
3806 * Support for selecting between multiple function definitions at runtime
3807 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3809 * The libcrypt library can now use the hash function implementations in
3810 NSS. Implemented by Ulrich Drepper.
3812 * The malloc implementation can be compiled to be less memory efficient
3813 but higher performing in multi-threaded programs.
3814 Implemented by Ulrich Drepper.
3816 * New locales: nan_TW@latin, ks_IN
3818 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3819 Implemented by Ulrich Drepper.
3821 * Extended printf hook support. It is possible to use user-defined types
3822 and extend existing format specifiers.
3823 Implemented by Ulrich Drepper.
3825 * Handling for group shadow files has been added.
3826 Implemented by Ulrich Drepper.
3828 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3829 servers (the case, e.g., for some people using the built-in DNS
3830 server in ADSL modems/routers). There is a once-per-process timeout
3831 in case of a broken server. To avoid it, users can run nscd or put
3832 'options single-request' in /etc/resolv.conf.
3833 Implemented by Ulrich Drepper.
3837 * The following bugs are resolved with this release:
3839 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3840 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3841 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3842 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3843 6968, 6974, 6980, 6995, 7008, 7009, 7029
3845 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3846 up at the same time. Implemented by Ulrich Drepper.
3848 * TLS descriptors for LD and GD on x86 and x86-64.
3849 Implemented by Alexandre Oliva.
3851 * getaddrinfo now handles DCCP and UDPlite.
3852 Implemented by Ulrich Drepper.
3854 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3855 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3856 Implemented by Ulrich Drepper.
3858 * New implementation of memmem, strstr, and strcasestr which is O(n).
3859 Implemented by Eric Blake.
3861 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3863 * Implement "e" option for popen to open file descriptor with the
3864 close-on-exec flag set. Implemented by Ulrich Drepper.
3866 * Implement "b" mode for fmemopen. In this mode writes writes don't
3867 implicitly add a NUL byte and seeks from the end of the buffer really
3868 use the buffer end, not the string length as the basis.
3869 Implemented by Ulrich Drepper.
3871 * Many functions, exported and internal, now atomically set the close-on-exec
3872 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3874 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3876 Implemented by Pravin Satpute.
3878 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3882 * The following bugs are resolved with this release:
3884 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3885 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3886 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3887 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3888 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3889 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3890 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3892 * New locales: bo_CN, bo_IN, shs_CA.
3894 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3896 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3897 Implemented by Pravin Satpute.
3899 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3901 * nscd caches now all timeouts for DNS entries
3902 Implemented by Ulrich Drepper.
3904 * nscd is more efficient and wakes up less often.
3905 Implemented by Ulrich Drepper.
3907 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3908 vdprintf, and obstack_vprintf.
3909 Implemented by Jakub Jelinek.
3911 * Faster memset for x86-64.
3912 Implemented by Harsha Jagasia and H.J. Lu.
3914 * Faster memcpy on x86.
3915 Implemented by Ulrich Drepper.
3917 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3918 Implemented by Ulrich Drepper.
3920 * Faster sqrt and sqrtf implemention for some PPC variants.
3921 Implemented by Steven Munroe.
3925 * The following bugs are resolved with this release:
3927 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3928 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3929 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3930 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3931 5071, 5103, 5104, 5112, 5113, 5184, 5186
3933 * More checking functions: fread, fread_unlocked, open*, mq_open.
3934 Implemented by Jakub Jelinek and Ulrich Drepper.
3936 * Extend fortification to C++. Implemented by Jakub Jelinek.
3938 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3939 by not recognizing 'a' as a modifier when those specs are requested.
3940 Implemented by Jakub Jelinek.
3942 * PPC optimizations to math and string functions.
3943 Implemented by Steven Munroe.
3945 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3946 options to be passed. Implemented by Ulrich Drepper.
3948 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3950 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3951 Implemented by Ulrich Drepper.
3953 * Handle private futexes in the NPTL implementation.
3954 Implemented by Jakub Jelinek and Ulrich Drepper.
3956 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3957 Implemented by Roland McGrath and Ulrich Drepper.
3959 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3961 * SHA-256 and SHA-512 based password encryption.
3962 Implemented by Ulrich Drepper.
3964 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3965 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3968 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3969 Implemented by Ulrich Drepper.
3973 * The following bugs are resolved with this release:
3975 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3976 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3977 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3978 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3979 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3980 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3981 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3984 * New Linux interfaces: epoll_pwait, sched_getcpu.
3986 * New generic interfaces: strerror_l.
3988 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3992 * The following bugs are resolved with this release:
3994 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3995 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3996 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3997 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3998 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3999 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
4000 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
4001 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
4002 3225, 3251, 3252, 3253, 3273
4004 * For Linux, the sorting of addresses returned by getaddrinfo now also
4005 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
4006 Implemented by Ulrich Drepper.
4008 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
4009 Implemented by Ulrich Drepper.
4011 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
4013 * New iconv module for MIK. Contributed by Alexander Shopov.
4015 * For sites with broken group and/or passwd database, the auto-propagate
4016 option of nscd can prevent creating ID lookup entries from the results
4017 of a name lookup and vice versa. This usually is no problem but some
4018 site might have problems with the default behavior.
4019 Implemented by Ulrich Drepper.
4021 * Iterating over entire database in NIS can be slow. With the
4022 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
4023 to trade time for memory. The entire database will be read at once.
4024 Implemented by Ulrich Drepper.
4026 * The interfaces introduced in RFC 3542 have been implemented by
4029 * Support for the new ELF hash table format was added by Ulrich Drepper.
4031 * Support for priority inheritance mutexes added by Jakub Jelinek and
4034 * Support for priority protected mutexes added by Jakub Jelinek.
4036 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
4037 or_IN, csb_PL, fy_NL, sr_ME.
4041 * More overflow detection functions.
4043 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
4044 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
4046 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
4047 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
4048 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
4049 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
4050 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
4051 by Masahide Washizawa.
4053 * It is now possible to install audit libraries for the dynamic linker using
4054 LD_AUDIT. Implemented by Ulrich Drepper.
4056 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
4057 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
4058 For a libc and libpthread that works well on Linux 2.4 kernels, we
4059 recommend using the stable 2.3 branch.
4061 * The new function open_wmemstream acts like open_memstream,
4062 but uses a wchar_t wide character buffer.
4064 * The new function ppoll is an improved version of poll, similar to pselect.
4066 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4067 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4068 renameat, unlinkat, linkat, symlinkat, readlinkat.
4070 * New Linux kernel system calls: unshare,
4071 inotify_init, inotify_add_watch, inotify_rm_watch.
4073 * The euidaccess function is now also known by the alias eaccess,
4074 for compatibility with some other systems.
4076 * Timezone data updated to 2006b version.
4080 * The following bugs are resolved with this release:
4082 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4083 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4084 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4085 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4086 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4087 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4089 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4091 * As of this release, GCC 4 can be used to compile the C Library.
4093 * Timezone data updated to 2005m version.
4097 * The following bugs are resolved with this release:
4099 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4100 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4101 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4102 777, 787, 821, 822, 823, 825
4104 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4108 * Support for RFC 3678. Real implementations exist only for Linux so far.
4109 Implemented by Ulrich Drepper.
4111 * nscd can now cache entries persistently. Expiring entries are reloaded.
4112 For speedups the cache can be shared in memory with client processes.
4113 Implemented by Ulrich Drepper.
4115 * nscd can now perform SELinux checks.
4116 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4118 * getaddrinfo queries are now cached. Canonical name lookup is performed
4120 Implemented by Ulrich Drepper.
4122 * The nothrow function attribute is used when headers are used by gcc when
4123 compiling C code. This can avoid significant amounts of exception
4126 * The malloc functions perform more error checking and are stricter when
4127 it comes to reacting on errors. The default action is to terminate
4128 the process after showing an error message. Implemented by Ulrich Drepper.
4130 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4131 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4133 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4134 namespaces using the new function dlmopen(). This feature is of course,
4135 like most other dynamic loading functionality, not available in statically
4136 linked applications. Implemented by Ulrich Drepper.
4138 * Low-overhead boundary checking variants of string and some stdio functions
4139 were added. These are to be used in conjunction with a gcc patch by
4140 Jakub Jelinek which adds calls to these functions if possible.
4141 Implemented by Jakub Jelinek and Ulrich Drepper.
4143 * Old code for several operating systems and machine architectures that
4144 have not been in working condition in a long time have been removed from
4145 the main source tree maintained by the GNU C Library's maintainers.
4146 These files are now reside in the separate `ports' source module
4147 that is usable as an add-on when building the library.
4151 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4152 interrogate the dynamic linker, compatible with the Solaris interface.
4154 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4155 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4157 * getifaddrs now uses the netlink interface on Linux to get its information.
4158 Implemented by Thorsten Kukuk.
4160 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4161 Implemented by Ulrich Drepper.
4163 * support for non-executable stacks on x86 has been added. Changes mostly
4166 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4169 * getaddrinfo now performs destination address selection according to
4174 * Thread-safe interfaces for many functions that access locale data
4175 were added in version 2.3, but these features were omitted from NEWS.
4176 Many functions have variants with an `_l' suffix that take a `locale_t'
4177 object as a parameter rather than consulting the current locale.
4178 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4179 create and maintain `locale_t' objects. Additionally, the new function
4180 `uselocale' sets "the current locale" (as used by functions not so
4181 parameterized) set for an individual thread. These features were added
4182 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4184 * The functions getresuid, getresgid, setresuid, and setresgid, which
4185 have long been available on Linux, are now declared in <unistd.h>
4186 and are now also available on the Hurd.
4188 * ELF thread-local storage support (TLS) now works on x86-64.
4190 * The new dynamic string token $LIB is expanded in shared library names.
4191 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4193 * Aldy Hernandez contributed complete software floating point support for
4194 PowerPC machines with no FPU.
4196 * fexecve is implemented on Linux.
4198 * The `btowc' function should work at least twice as fast due to
4199 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4201 * With approriate thread add-ons cancelable functions are now implemented
4202 in libc.so as well. No need to call the function in libpthread. This
4203 change allowed to finally disable the incorrect and expensive handling
4204 of weak definition in ld.so.
4206 * Yet more PLT entries in libc.so have been removed. We finally arrived
4207 at the bare minimum. Startup times improved appropriately.
4209 * Support for the new Linux/x86 system call interface was added. The
4210 AT_SYSINFO auxiliary vector entry is recognized and handled.
4214 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4217 * iconv (the program and the interface) now accepts empty names (excluding
4218 options like //TRANSLIT) to mean "use charset of current locale".
4220 * localedef can now transliterate characters in strings which are not in
4221 the provided charmap. The information from the input locale is used.
4223 * Prelinking support was added for ELF targets. This requires additional
4224 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4226 * Read-only stdio streams now use mmap to speed up operation by eliminating
4227 copying and buffer underflows. To use add 'm' to the mode string of
4228 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4230 * The malloc functions were completely rewritten by Wolfram Gloger based
4231 on Doug Lea's malloc-2.7.0.c.
4233 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4234 implementation of regex.
4236 * Bruno Haible upgraded the iconv and locale implementation to support
4239 * Contents of the LC_* and LANG environment variables in the CEN style are
4240 not recognized anymore. It never was used. Change by Ulrich Drepper.
4242 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4243 thread-local storage (TLS) ABI on some platforms.
4244 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4246 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4247 EUC-JISX0213, and TSCII.
4249 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4250 BSD-compatible interface for getting all network interface addresses.
4251 Implementation for IPv4 by Roland McGrath.
4253 * Loading of locale data is faster due to the introduction of a locale
4254 archive. Implemented by Roland McGrath and Ulrich Drepper.
4256 * Startup times are significantly reduced by not using exported functions
4257 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4260 * Steven Munroe contributed a port to PowerPC64/Linux.
4264 * The Hurd now uses the GNU libio implementation of stdio rather than the
4265 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4267 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4268 with the same behavior as the Linux system call of the same name.
4272 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4273 128-bit long double format.
4275 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4276 IBM1161, and IBM1162 charsets.
4278 * Andreas Jaeger contributed a port to x86-64/Linux.
4280 * Peter Bruin contributed a port to PowerPC/Hurd.
4282 * libc functions using I/O streams now can handle wide-oriented streams
4285 * optimizations in the dynamic linker. Binaries created by recent binutils
4286 versions start up quicker due to reduced time spent on relocations.
4288 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4292 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4293 asinh, atanh, j0 for the 128-bit long double format.
4295 * Bruno Haible updated all the code handling Unicode in some form to
4296 support Unicode 3.1.
4298 * Speed of regex for single-byte locales is back to previous levels.
4299 Patch by Isamu Hasegawa.
4301 * Alpha, SPARC, and IA-64 now also using floating stacks.
4303 * Startup time of internationalized applications greatly improved through
4304 iconv cache. Use iconvconfig to generate the cache file.
4305 Contributed by Ulrich Drepper.
4307 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4308 severe performance problems. Patch by David Mosberger.
4310 * The Hurd port got a lot more functionality like AIO, various stdio
4311 extensions, etc. Mainly done by Roland McGrath.
4313 * mtrace can now lookup symbols in shared libraries.
4317 * Intel's IA-64 math library is largely integrated. It provides fast and
4318 accurate implementatations for most basic and standard math functions
4319 in float, double, and long double format.
4321 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4322 and asin for the 96-bit long double format and asin, log, tan for the
4323 128-bit long double format.
4325 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4326 The basic double functions exist today. Contributed by Abraham Ziv
4327 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4328 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4330 * An asynchronous name lookup library was added. The interface is designed
4331 after POSIX AIO. The proposal was circulated beforehand to get comments.
4332 No negative ones came in. Implemented by Ulrich Drepper.
4334 * Port to S390/64bit contributed by Martin Schwidefsky
4335 <schwidefsky@de.ibm.com>.
4337 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4338 of functions for Linux/IA-64.
4340 * The RPC code is now thread safe. Threads can now use the same service
4341 of different services at the same time. Patch by Eric Norum
4342 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4344 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4345 family of functions for Linux/S390.
4347 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4348 of functions for Linux/x86.
4350 * Port to Linux/CRIS contributed by Axis Communications.
4354 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4355 we can now check for namespace violations and missing declarations. The
4356 result is that almost all headers are now Unix-compliant (as defined in
4357 the upcoming XPG6). The negative side is that some programs might need
4358 corrections, too, if they depend on the incorrect form of the headers in
4359 previous versions which defined too many symbols and included too many
4362 * regex now handles multibyte character sets correctly.
4363 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4365 * iconv (the program) does now conform to the upcoming XPG6 and handles
4366 charmaps. Instead of the charset names the path of charmaps can be
4367 provided and the conversion happens based on this data.
4368 Contributed by Ulrich Drepper.
4370 * The locale program now provides detailed information about the installed
4375 only lists the names of the supported locales
4379 provides details such as country, language, and codeset name.
4380 Contributed by Ulrich Drepper.
4384 * The gencat program now parses the input file according to the charset
4385 selected by the LC_CTYPE category. This is important for stateful
4386 character sets. To make generating catalogs easier there is a way
4387 to overwrite the charset selected by the locale: before the first
4388 message or $ quote line the catalog can contain a line like
4390 $ codeset=ISO-8859-2
4392 to select the charset (ISO-8859-2 in this case).
4394 Implemented by Shinya Hanataka and Ulrich Drepper.
4396 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4397 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4398 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4400 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4401 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4403 * The LANGUAGE environment variable is now ignored unless the locale is
4404 changed from the default "C" locale.
4406 * The usual bug fixes.
4410 * Greg McGary added runtime support for bounds checking using gcc's
4411 new -fbounded-pointers option. ix86 target is complete. PowerPC
4414 * Thorsten Kukuk added secure mode support to nscd.
4416 * The Berkeley db libraries have been removed.
4418 Related, the nss_db module is now in a separate package since it
4419 obviously requires a database library being available.
4421 * Wide character I/O streams implemented by Ulrich Drepper.
4423 * Functions from the extended socket API added by Ulrich Drepper.
4425 * Functions feenableexcept and fedisableexcept to control the
4426 behaviour of individual exceptions have been added by Andreas Jaeger.
4428 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4430 * The resolver code has been updated from bind 8.2.3-T5B which supports
4431 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4434 This change could in some situations effect backward compatibility. Since
4435 now `_res' is a thread-local instead of a global variable, modifying it
4436 in one thread does not have any effect in other threads.
4438 The resolver library was also extended to allow IPv6 as the transport
4439 protocol for the requests. This work was done by Stig Venaas.
4441 * Compatibility code for K&R C compilers has been removed from the
4442 header files. A ISO C compiler is needed to use the library
4443 (conforming to either C89 or C99 standard).
4445 * Complete rewrite of the localedef program to support multibyte character
4446 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4447 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4448 Implemented by Ulrich Drepper.
4450 Bruno Haible significantly improved the generation and use of the data
4451 structures for the wide character tables.
4453 * Plural handling in gettext implemented by Ulrich Drepper.
4455 * The utmp daemon has been removed.
4457 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4459 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4462 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4464 * POSIX barriers implemented by Kaz Kylheku.
4466 * POSIX spawn function family implemented by Ulrich Drepper.
4468 * POSIX spinlocks are now available.
4470 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4472 * the configure option --enable-kernel=X.Y.Z allows to strip out
4473 compatibility for kernel versions before X.Y.Z. This is currently only
4474 implemented for Linux.
4476 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4477 field sin6_scope_id. This means that all programs using IPv6 should be
4478 recompiled. Don't expect binary compatibility with previous glibc
4481 * various conversion modules for IBM character sets contributed by
4484 * IA-64 port by Jes Sorensen and HJ Lu.
4498 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4500 * New xdr functions are added; some rpc functions are now 64bit clean.
4502 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4504 * Fixed known incompatibilities with glibc 2.0.
4506 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4508 * Optimized a number of functions (especially the ELF dynamic loader).
4510 * Update timezone data files.
4512 * lots of charmaps corrections
4514 * some new locale definitions and charmaps
4519 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4520 conform to POSIX member type requirements. Symbol versions have been
4521 adjusted as needed within the library, and for direct use by applications,
4522 but there is potential for problems if third-party libraries use
4523 struct timeval as part of their interface. This does not present
4524 a problem for X and other "essential" system libraries.
4526 * An additional locale model to support C++ Standard Library locale
4527 model and probably more was implemented by Ulrich Drepper.
4529 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4532 * Miles Bader provided the `argp' function family to support hierachical
4533 command line argument parsing, layered on top of getopt.
4535 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4537 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4540 * scanf recognizes the %a and %A format for scanning floating point numbers.
4542 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4543 information and interfaces for the available integer types.
4545 * about 130 new math functions were added to implement the ISO C9x math
4548 * the new header <complex.h> contains definitions of the complex math
4549 functions from ISO C 9X.
4551 * the new header <tgmath.h> defines generic macros to use complex or
4552 real valued functions.
4554 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4556 * Andreas Jaeger provided a test suite for the math library.
4558 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4560 * Ulrich Drepper added character set conversion functions (iconv).
4562 * Optimized string functions have been added.
4564 * The localedata addon is now part of glibc.
4566 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4568 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4569 daemon for NSS (nscd).
4571 Missing a better place here are some numbers on improvements. Under
4572 Linux 2.1.125 un-tar-ing the kernel sources takes
4576 using local files 12.19s 6.88s 22.91s
4578 using NIS 13.92s 8.91s 26.34s
4580 using NIS & nscd 10.37s 7.34s 25.30s
4582 using NIS+ 27.57s 30.37s 640.46s
4584 using NIS+ & nscd 10.25s 7.83s 26.51s
4586 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4588 Keep in mind that non-namelookup related operations dominate above times.
4589 It was just a common complain that using NIS+ unpacking the kernel is
4592 [1] The old nscd implementation is not available anymore since it was
4593 distributed with glibc up to version 2.0.98 and thus is now replaced.
4595 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4597 * Mark Kettenis provided a Hesiod NSS module.
4599 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4600 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4602 * rcmd can now handle netgroups (Dick Streefland).
4604 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4607 * Support for the IPv6 protocol has been added to the socket API, as per the
4608 latest draft standards.
4610 * Support for Linux 2.2 has been added.
4612 * Interface changes relative to the latest 2.0.x release:
4613 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4614 addseverity NEW: Unix98
4615 alphasort64 NEW: LFS
4616 argp_err_exit_status NEW: argp, GNU ext
4617 argp_error NEW: argp, GNU ext
4618 argp_failure NEW: argp, GNU ext
4619 argp_help NEW: argp, GNU ext
4620 argp_parse NEW: argp, GNU ext
4621 argp_program_bug_address NEW: argp, GNU ext
4622 argp_program_version NEW: argp, GNU ext
4623 argp_program_version_hook NEW: argp, GNU ext
4624 argp_state_help NEW: argp, GNU ext
4625 argp_usage NEW: argp, GNU ext
4626 authdes_create NEW: Secure RPC
4627 authdes_getucred NEW: Secure RPC
4628 authdes_pk_create NEW: Secure RPC
4629 backtrace NEW: GNU ext.
4630 backtrace_symbols NEW: GNU ext.
4631 backtrace_symbols_fd NEW: GNU ext.
4633 cacosf NEW: ISO C 9x
4634 cacosh NEW: ISO C 9x
4635 cacoshf NEW: ISO C 9x
4636 cacoshl NEW: ISO C 9x
4637 cacosl NEW: ISO C 9x
4644 casinf NEW: ISO C 9x
4645 casinh NEW: ISO C 9x
4646 casinhf NEW: ISO C 9x
4647 casinhl NEW: ISO C 9x
4648 casinl NEW: ISO C 9x
4650 catanf NEW: ISO C 9x
4651 catanh NEW: ISO C 9x
4652 catanhf NEW: ISO C 9x
4653 catanhl NEW: ISO C 9x
4654 catanl NEW: ISO C 9x
4655 cbc_crypt NEW: Secure RPC
4659 ccoshf NEW: ISO C 9x
4660 ccoshl NEW: ISO C 9x
4666 cimagf NEW: ISO C 9x
4667 cimagl NEW: ISO C 9x
4668 clearerr_locked REMOVED
4669 clntunix_create NEW: sunrpc ext
4671 clog10 NEW: ISO C 9x
4672 clog10f NEW: ISO C 9x
4673 clog10l NEW: ISO C 9x
4683 cprojf NEW: ISO C 9x
4684 cprojl NEW: ISO C 9x
4686 crealf NEW: ISO C 9x
4687 creall NEW: ISO C 9x
4692 csinhf NEW: ISO C 9x
4693 csinhl NEW: ISO C 9x
4696 csqrtf NEW: ISO C 9x
4697 csqrtl NEW: ISO C 9x
4701 ctanhf NEW: ISO C 9x
4702 ctanhl NEW: ISO C 9x
4704 des_setparity NEW: Secure RPC
4705 ecb_crypt NEW: Secure RPC
4706 endutxent NEW: Unix98
4708 exp10f NEW: ISO C 9x
4709 exp10l NEW: ISO C 9x
4713 fattach NEW: STREAMS
4714 fdetach NEW: STREAMS
4718 feclearexcept NEW: ISO C 9x
4719 fegetenv NEW: ISO C 9x
4720 fegetexceptflag NEW: ISO C 9x
4721 fegetround NEW: ISO C 9x
4722 feholdexcept NEW: ISO C 9x
4724 feraiseexcept NEW: ISO C 9x
4725 ferror_locked REMOVED
4726 fesetenv NEW: ISO C 9x
4727 fesetexceptflag NEW: ISO C 9x
4728 fesetround NEW: ISO C 9x
4729 fetestexcept NEW: ISO C 9x
4730 feupdateenv NEW: ISO C 9x
4731 fflush_locked REMOVED
4735 fgets_unlocked NEW: GNU ext.
4736 fileno_locked REMOVED
4748 fputc_locked REMOVED
4749 fputs_unlocked NEW: GNU ext.
4750 fread_unlocked NEW: GNU ext.
4755 fstatvfs NEW: Unix98
4759 ftruncate64 NEW: LFS
4761 fwrite_unlocked NEW: GNU ext.
4762 gai_strerror NEW: IPv6
4766 getchar_locked REMOVED
4768 getdate_err NEW: Unix98
4769 getdate_r NEW: GNU ext.
4771 getnameinfo NEW: IPv6
4772 getnetname NEW: Secure RPC
4773 getpmsg NEW: STREAMS
4774 getpt NEW: Unix98 PTY
4775 getrlimit64 NEW: LFS
4776 getutxent NEW: Unix98
4777 getutxid NEW: Unix98
4778 getutxline NEW: Unix98
4779 glob64 NEW: GNU ext.
4780 globfree64 NEW: GNU ext.
4781 gnu_get_libc_release NEW: GNU ext.
4782 gnu_get_libc_version NEW: GNU ext.
4783 grantpt NEW: Unix98 PTY
4784 host2netname NEW: Secure RPC
4786 iconv_close NEW: iconv
4787 iconv_open NEW: iconv
4788 if_freenameindex NEW: IPv6
4789 if_indextoname NEW: IPv6
4790 if_nameindex NEW: IPv6
4791 if_nametoindex NEW: IPv6
4792 in6addr_any NEW: IPv6
4793 in6addr_loopback NEW: IPv6
4794 inet6_isipv4mapped NEW: IPv6
4795 isastream NEW: STREAMS
4796 iswblank NEW: GNU ext.
4797 key_decryptsession NEW: Secure RPC
4798 key_decryptsession_pk NEW: Secure RPC
4799 key_encryptsession NEW: Secure RPC
4800 key_encryptsession_pk NEW: Secure RPC
4801 key_gendes NEW: Secure RPC
4802 key_get_conv NEW: Secure RPC
4803 key_secretkey_is_set NEW: Secure RPC
4804 key_setnet NEW: Secure RPC
4805 key_setsecret NEW: Secure RPC
4806 llrint NEW: ISO C 9x
4807 llrintf NEW: ISO C 9x
4808 llrintl NEW: ISO C 9x
4809 llround NEW: ISO C 9x
4810 llroundf NEW: ISO C 9x
4811 llroundl NEW: ISO C 9x
4816 lrintf NEW: ISO C 9x
4817 lrintl NEW: ISO C 9x
4818 lround NEW: ISO C 9x
4819 lroundf NEW: ISO C 9x
4820 lroundl NEW: ISO C 9x
4822 makecontext NEW: Unix98
4823 mempcpy NEW: GNU ext.
4826 modify_ldt NEW: kernel
4830 nearbyint NEW: ISO C 9x
4831 nearbyintf NEW: ISO C 9x
4832 nearbyintl NEW: ISO C 9x
4833 netname2host NEW: Secure RPC
4834 netname2user NEW: Secure RPC
4835 nexttoward NEW: ISO C 9x
4836 nexttowardf NEW: ISO C 9x
4837 nexttowardl NEW: ISO C 9x
4841 passwd2des NEW: Secure RPC
4843 pow10f NEW: GNU ext.
4844 pow10l NEW: GNU ext.
4847 printf_size NEW: GNU ext.
4848 printf_size_info NEW: GNU ext.
4849 profil_counter REMOVED
4850 pthread_mutexattr_getkind_np REPLACED
4851 pthread_mutexattr_setkind_np REPLACED
4852 ptsname NEW: Unix98 PTY
4853 ptsname_r NEW: Unix98 PTY
4855 putchar_locked REMOVED
4856 putgrent NEW: GNU ext.
4858 putpmsg NEW: STREAMS
4859 pututxline NEW: Unix98
4863 readdir64_r NEW: LFS
4864 remquo NEW: ISO C 9x
4865 remquof NEW: ISO C 9x
4866 remquol NEW: ISO C 9x
4868 roundf NEW: ISO C 9x
4869 roundl NEW: ISO C 9x
4871 scalbln NEW: ISO C 9x
4872 scalblnf NEW: ISO C 9x
4873 scalblnl NEW: ISO C 9x
4875 sendfile NEW: kernel
4876 setcontext NEW: Unix98
4877 setrlimit64 NEW: LFS
4878 setutxent NEW: Unix98
4880 sigignore NEW: Unix98
4881 sigqueue NEW: POSIX.1b
4882 sigrelse NEW: Unix98
4883 sigset NEW: POSIX.1b
4884 sigtimedwait NEW: POSIX.1b
4885 sigwaitinfo NEW: POSIX.1b
4886 sincos NEW: GNU ext.
4887 sincosf NEW: GNU ext.
4888 sincosl NEW: GNU ext.
4892 strcasestr NEW: GNU ext.
4893 strtoimax NEW: ISO C 9x
4894 strtoumax NEW: ISO C 9x
4895 strverscmp NEW: GNU ext.
4896 svcauthdes_stats NEW: Secure RPC
4897 svcunix_create NEW: sunrpc etx
4898 svcunixfd_create NEW: sunrpc ext
4899 swapcontext NEW: Unix98
4900 tcgetsid NEW: Unix98 PTY
4901 tdestroy NEW: GNU ext.
4902 tgamma NEW: ISO C 9x
4903 tgammaf NEW: ISO C 9x
4904 tgammal NEW: ISO C 9x
4908 truncf NEW: ISO C 9x
4909 truncl NEW: ISO C 9x
4911 unlockpt NEW: Unix98 PTY
4912 updwtmpx NEW: Unix98
4913 user2netname NEW: Secure RPC
4914 utmpxname NEW: Unix98
4915 versionsort NEW: GNU ext.
4916 versionsort64 NEW: GNU ext.
4918 wcscasecmp NEW: GNU ext.
4919 wcsncasecmp NEW: GNU ext.
4920 wcsnlen NEW: GNU ext.
4921 wcstoimax NEW: ISO C 9x
4922 wcstoll NEW: ISO C 9x
4923 wcstoull NEW: ISO C 9x
4924 wcstoumax NEW: ISO C 9x
4926 wordexp NEW: POSIX.2
4927 wordfree NEW: POSIX.2
4928 write_profiling REMOVED
4929 xdecrypt NEW: Secure RPC
4930 xdr_authdes_cred NEW: Secure RPC
4931 xdr_authdes_verf NEW: Secure RPC
4932 xdr_cryptkeyarg NEW: Secure RPC
4933 xdr_cryptkeyarg2 NEW: Secure RPC
4934 xdr_cryptkeyres NEW: Secure RPC
4935 xdr_getcredres NEW: Secure RPC
4936 xdr_key_netstarg NEW: Secure RPC
4937 xdr_key_netstres NEW: Secure RPC
4938 xdr_keybuf NEW: Secure RPC
4939 xdr_keystatus NEW: Secure RPC
4940 xdr_netnamestr NEW: Secure RPC
4941 xdr_sizeof NEW: Secure RPC
4942 xdr_unixcred NEW: sunrpc ext
4943 xencrypt NEW: Secure RPC
4944 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4955 * inet_ntoa is thread-safe
4957 * updwtmp is moved from libutil to libc
4959 * rewrite of cbrt function
4961 * update of timezone data
4975 * add atoll function
4977 * fix complex problems in Berkeley DB code
4979 * fix math functions
4983 * fixed lots of header problems (especially Linux/GNU specific)
4985 * dynamic loader preserves all registers
4987 * Roland McGrath provided support for handling of auxiliary objects in
4988 the ELF dynamic loader.
4990 * support for parallel builds is improved
4994 * GNU extensions are no longer declared by default. To enable them you
4995 must define the macro `_GNU_SOURCE' in your program or compile with
4998 * The library has changed from using GNU ld symbol aliases to using weak
4999 symbols where available. The ELF object file format supports weak
5000 symbols; GNU ld also supports weak symbols in the a.out format. (There
5001 is also now support for other GNU ld extensions in ELF. Use the
5002 `--with-elf' option to configure to indicate you have ELF, and
5003 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
5004 of many files which contained only symbol aliases, reducing the size of
5005 the source and the compiled library; many other files were renamed to
5006 less cryptic names previously occupied by the symbol alias files.
5007 There is a new header file <elf.h> for programs which operate on
5008 files in the ELF format.
5010 * Converted to Autoconf version 2, so `configure' has more options.
5011 Run `configure --help' to see the details.
5013 * The library can now be configured to build profiling, highly-optimized
5014 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
5015 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
5016 `configure' enable building these extra libraries. The shared library is
5017 built by default when using both ELF and GNU ld. When shared libraries
5018 are enabled, the new library `-ldl' is available for arbitrary run-time
5019 loading of shared objects; its interface is defined in <dlfcn.h>. The
5020 new header file <link.h> gives access to the internals of the run-time
5021 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
5022 application of same name on other systems and it provides information
5023 about dynamically linked binaries.
5025 * The C library now provides the run-time support code for profiling
5026 executables compiled with `-pg'. Programs can control the profiling code
5027 through the interface in <sys/gmon.h>. The `gmon.out' files written by
5028 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
5029 the support for this file format was contributed by David Mosberger-Tang.
5031 * The math code has been replaced with a math library based on fdlibm from
5032 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
5033 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
5034 functions. The math functions now reside in a separate library, so
5035 programs using them will need to use `-lm' their linking commands.
5037 * John C. Bowman contributed optimized ix87 assembler inline functions.
5039 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
5040 mechanism similar to that found in Solaris 2. This is now used for the
5041 group, passwd, hosts, networks, services, protocols, rpc, ethers,
5042 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
5043 file controls what services are used for each individual database. This
5044 works by loading shared libraries with names specified in `nsswitch.conf',
5045 so service modules can be changed or added at any time without even
5046 relinking any program. Currently there are the file, db, and NIS based
5047 NSS services available.
5049 * The new functions `strtoq' and `strtouq' parse integer values from
5050 strings, like `strtol' and `strtoul', but they return `long long int' and
5051 `unsigned long long int' values, respectively (64-bit quantities).
5053 * The new functions `strtof' and `strtold' parse floating-point values from
5054 strings, like `strtod', but they return `float' and `long double' values,
5055 respectively (on some machines `double' and `long double' are the same).
5057 * Ulrich Drepper has contributed new implementations of the floating-point
5058 printing and reading code used in the `printf' family of functions and
5059 `strtod', `strtof', and `strtold'. These new functions are perfectly
5060 accurate, and much faster than the old ones.
5062 * The implementation of the POSIX locale model was completely rewritten by
5063 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5064 to compile the POSIX locale definition.
5066 * The former dummy implementations of the strcoll and strxfrm function are
5067 now replaced by fully functional code contributed by Ulrich Drepper. The
5068 collation information comes from the POSIX locale definitions.
5070 * The new header <langinfo.h> defines an interface for accessing
5071 various locale-dependent data (using the locale chosen with `setlocale').
5073 * Ulrich Drepper has contributed a new suite of functions for operation on
5074 wide-character and multibyte-character strings, in <wchar.h>;
5075 and classification and case conversion of wide characters, in <wctype.h>.
5076 These new functions are conforming to the ISO C, Amendement 1 specification.
5078 * There is now a second implementation of the standard I/O library available.
5079 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5080 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5082 * You can now use positional parameter specifications in format strings
5083 for the `printf' and `scanf' families of functions. For example,
5084 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5085 ``Number 6, Mr Jones''. This is mainly useful when providing different
5086 format strings for different languages, whose grammars may dictate
5087 different orderings of the values being printed. To support this
5088 feature, the interface for `register_printf_handler' has changed; see
5089 the header file <printf.h> for details.
5091 * The `printf' and `scanf' families of functions now understand a new
5092 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5093 to group numbers as indicated by the locale; for `scanf' and friends, this
5094 says to accept as valid only a number with all the proper grouping
5095 separators in the right places. In the default "C" locale, numbers are
5096 not grouped; but locales for specific countries will define the usual
5097 conventions (i.e. separate thousands with `,' in the US locale).
5099 * The pgrp functions have been regularized, slightly incompatibly but much
5100 less confusingly. The core functions are now `getpgid' and `setpgid',
5101 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5102 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5103 provided for compatibility. There is no longer an incompatible `getpgrp'
5104 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5106 * The new header file <fts.h> and suite of functions simplify programs that
5107 operate on directory trees. This code comes from 4.4 BSD.
5109 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5110 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5111 NSS scheme used in glibc.
5113 * There is a new malloc debugging hook `__memalign_hook'.
5115 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5116 `unsigned int' in <sys/types.h>. These are for compatibility only and
5117 their use is discouraged.
5119 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5120 done differently, so that it works even without GNU ld.
5122 * New function `euidaccess' checks allowed access to a file like `access',
5123 but using the effective IDs instead of the real IDs.
5125 * The time zone data files have been updated for the latest and greatest
5126 local time conventions of the countries of the world.
5128 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5131 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5132 for formatting floating-point numbers. They are provided only for
5133 compatibility; new programs should use `sprintf' instead. There are
5134 also equivalent function for the `long double' floating-point type and
5135 all functions also exist in a reentrant form.
5137 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5138 functions for maintaining the login-record files (primarily of use to
5139 system programs such as `login'), and convenient functions for
5140 allocating and initializing a pseudo-terminal (pty) device.
5142 * Ulrich Drepper has contributed new support for System V style
5143 shared memory and IPC on systems that support it.
5145 * Ulrich Drepper has contributed several miscellaneous new functions found
5146 in System V: The `hsearch' family of functions provide an effective
5147 implementation of hash tables; `a64l' and `l64a' provide a very simple
5148 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5151 * Ulrich Drepper has contributed new reentrant counterparts for the
5152 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5154 * Ulrich Drepper has contributed new, highly-optimized versions of several
5155 string functions for the i486/Pentium family of processors.
5157 * Ulrich Drepper has updated the Linux-specific code, based largely
5158 on work done in Hongjiu Lu's version of GNU libc for Linux.
5159 The GNU library now supports Linux versions 2.0.10 and later,
5160 using the ELF object file format (i[3456]86-*-linux).
5162 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5164 * David Mosberger-Tang and Richard Henderson have ported the C library
5165 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5166 dynamic linking support for ELF/Alpha.
5168 * Richard Henderson contributed several Alpha optimized assembler function
5169 for arithmetic and string handling.
5171 * Ulrich Drepper has contributed a new set of message catalog functions to
5172 support multiple languages using the <libintl.h> interface, for use with
5173 his new package GNU gettext. Translation volunteers have contributed
5174 catalogs of the library's messages in Spanish, German, and Korean.
5176 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5177 program and the `catgets' function for reading the catalog files it
5178 creates. (The <libintl.h> interface is preferred; we include the
5179 <nl_types.h> interface using `catgets' only for source compatibility with
5180 programs already written to use it.)
5182 * New header file <values.h> gives SVID-compatible names for <limits.h>
5185 * Various new macros, declarations, and small header files for compatibility
5188 * New function `group_member' is a convenient way to check if a process has
5189 a given effective group ID.
5191 * When using GCC 2.7 and later, the socket functions are now declared in a
5192 special way so that passing an argument of type `struct sockaddr_in *',
5193 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5194 `struct sockaddr *' type, does not generate a type-clash warning.
5196 * New function `error' declared in header file <error.h> is a convenient
5197 function for printing error messages and optionally exiting; this is the
5198 canonical function used in GNU programs. The new functions `err', `warn',
5199 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5200 doing the same thing.
5202 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5203 POSIX.2 `glob' function to do ~ and {...} expansion.
5205 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5206 `clearenv' which is used in POSIX.9 is also available.
5208 * New function `getsid' returns session ID number on systems that support it.
5210 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5211 files <db.h> and <mpool.h> provide a rich set of functions for several
5212 types of simple databases stored in memory and in files, and <ndbm.h> is
5213 an old `ndbm'-compatible interface using the `db' functions. Link with
5214 `-ldb' to get these functions.
5216 * New macro `strdupa' copies a string like `strdup', but uses local stack
5217 space from `alloca' instead of dynamic heap space from `malloc'.
5219 * New function `strnlen' is like `strlen' but searches only a given maximum
5220 number of characters for the null terminator. `stpncpy', `strndup' and
5221 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5224 * New function `statfs' in header <sys/statfs.h>.
5226 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5227 provide convenient functions for operating on blocks of null-terminated
5230 * A new suite of functions in <utmp.h> handle all the details of reading
5231 and writing the utmp file.
5233 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5236 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5237 completely POSIX compliant and also implemented the extended functionality
5238 to handle alternate digit representation and alternate era date formats.
5240 * Ulrich Drepper provided an implementation of the `strptime' function
5241 defined in XPG4.2 which transforms a string into a `struct tm' value.
5243 * Paul Eggert provided the tzselect shell script as part of the timezone
5244 code. The shell script makes it easy to select the correct timezone
5247 * The implementation of the malloc family of functions is completely replaced
5248 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5249 The implementation uses the mmap function (if available) and it is
5250 optimized for the use in multi threaded programs.
5252 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5253 functions. This new functionality is usable by specifying a special
5254 salt string and it is compatible with implementation on *BSD systems.
5256 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5257 `getsubopt' to handle second level command line options, `bsd_signal'
5258 to access BSD style `signal' functionality, the obsolete `regexp' style
5261 * the `lchown' function is available on system which support this
5264 * The implementation of the shadow password handling function was contributed
5267 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5269 * POSIX.1g support was added. The <sys/select.h> header is available,
5270 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5271 implementation of `getaddrinfo'.
5275 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5277 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5278 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5280 * The new function `daemon' from 4.4 BSD is useful for server programs that
5281 want to put themselves in the background.
5283 * Joel Sherrill has contributed support for several standalone boards that
5284 run without an operating system.
5286 * `printf', `scanf' and friends now accept a `q' type modifier for long
5287 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5289 * All of the code taken from BSD (notably most of the math and networking
5290 routines) has been updated from the BSD 4.4-Lite release.
5292 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5294 * The new functions `getdomainname' and `setdomainname' fetch or change the
5295 YP/NIS domain name. These are system calls which exist on systems which
5298 * The time zone data files have been updated for the latest international
5301 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5302 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5306 * The C library now includes support for Sun RPC, from Sun's free
5307 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5308 are included. (There is still no support for YP.)
5310 * Tom Quinn has contributed a port of the C library to SGI machines running
5311 Irix 4 (mips-sgi-irix4).
5313 * The new `lockf' function is a simplified interface to the locking
5314 facilities of `fcntl', included for compatibility.
5316 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5318 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5320 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5323 * The error message printed by `assert' for a failed assertion now includes
5324 the name of the program (if using GNU ld) and the name of the calling
5325 function (with versions of GCC that support this).
5327 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5329 * The library now includes the <sys/mman.h> header file and memory
5330 management functions `mmap', `munmap', `mprotect', `msync', and
5331 `madvise', on systems that support those facilities.
5333 * The interface for `mcheck' has changed slightly: the function called to
5334 abort the program when an allocation inconsistency is detected now takes
5335 an argument that indicates the type of failure. The new function
5336 `mprobe' lets you request a consistency check for a particular block at
5337 any time (checks are normally done only when you call `free' or `realloc'
5340 * It is now possible to easily cross-compile the C library, building on one
5341 system a library to run on another machine and/or operating system. All
5342 you need to do is set the variable `HOST_CC' in `configparms' to the
5343 native compiler for programs to run on the machine you are building on (a
5344 few generator programs are used on Unix systems); set `CC' to the
5347 * The new function `fexecve' (only implemented on the GNU system) executes
5348 a program file given a file descriptor already open on the file.
5352 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5353 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5355 * You can set the variable `libprefix' in `configparms' to specify a prefix
5356 to be prepended to installed library files; this makes it easy to install
5357 the GNU C library to be linked as `-lgnuc' or whatever.
5359 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5360 copies a limited number of characters from a string, and returns the
5361 address of the last character written.
5363 * You no longer need to check for whether the installed `stddef.h' is
5364 compatible with the GNU C library. configure now checks for you.
5366 * You can now define a per-stream `fileno' function to convert the
5367 stream's cookie into an integral file descriptor.
5369 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5370 allocates zero bytes of storage, and returns a unique pointer which
5371 you can pass to `realloc' or `free'. The behavior is undefined if
5372 you dereference this pointer.
5374 * The C library now runs on Sony NEWS m68k machines running either
5375 NewsOS 3 or NewsOS 4.
5377 * The new `syscall' function is a system-dependent primitive function
5378 for invoking system calls. It has the canonical behavior on Unix
5379 systems, including unreliable return values for some calls (such as
5380 `pipe', `fork' and `getppid').
5382 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5383 to `EAGAIN', which is the preferred name. On systems whose kernels
5384 use two distinct codes, the C library now translates EWOULDBLOCK to
5385 EAGAIN in every system call function.
5389 * The GNU C Library Reference Manual is now distributed with the library.
5390 `make dvi' will produce a DVI file of the printed manual.
5391 `make info' will produce Info files that you can read on line using C-h i
5392 in Emacs or the `info' program.
5393 Please send comments on the manual to bug-glibc-manual@gnu.org.
5395 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5397 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5399 * Jason Merrill has contributed a port to the Sequent Symmetry running
5400 Dynix version 3 (i386-sequent-dynix).
5402 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5403 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5405 * New function `memory_warnings' lets you arrange to get warnings when
5406 malloc is running out of memory to allocate, like Emacs gives you.
5408 * The C library now contains the relocating allocator used in Emacs 19 for
5409 its editing buffers. This allocator (ralloc) minimizes allocation
5410 overhead and fragmentation by moving allocated regions around whenever it
5411 needs to. You always refer to a ralloc'd region with a "handle" (a
5412 pointer to a pointer--an object of type `void **').
5414 * There is a new `printf' format: `%m' gives you the string corresponding
5415 to the error code in `errno'.
5417 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5418 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5419 pass, the `a' modifier says to fill in a `char **' you pass with a
5422 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5423 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5424 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5426 * `mkstemp' is a traditional Unix function to atomically create and open a
5427 uniquely-named temporary file.
5431 * The standard location for the file that says what the local timezone is
5432 has changed again. It is now `/usr/local/etc/localtime' (or more
5433 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5435 * The distribution no longer contains any files with names longer than 14
5438 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5439 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5441 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5445 * The configuration process has changed quite a bit. The `configure'
5446 script is now used just like the configuration scripts for other GNU
5447 packages. The `sysdeps' directory hierarchy is much rearranged.
5448 The file `INSTALL' explains the new scheme in detail.
5450 * The header files no longer need to be processed into ANSI C and
5451 traditional C versions. There is just one set of files to install, and
5452 it will work with ANSI or old C compilers (including `gcc -traditional').
5454 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5455 MIPS DECStation running Ultrix 4.
5457 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5458 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5459 made itself into a shared library.
5461 * Yet further improved support for the i386, running 4.3 BSD-like systems
5462 (such as Mach 3 with the Unix single-server), or System V.
5464 * New function `strncasecmp' to do case-insensitive string comparison
5465 with limited length.
5467 * New function `strsep' is a reentrant alternative to `strtok'.
5469 * New functions `scandir' and `alphasort' for searching directories.
5471 * New function `setenv' is a better interface to `putenv'.
5473 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5474 function for traversing a directory tree.
5476 * The GNU obstack package is now also part of the C library.
5477 The new function `open_obstack_stream' creates a stdio stream that
5478 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5479 formatted output directly to an obstack.
5481 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5482 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5484 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5486 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5487 things to your strings.
5489 * There are some new test programs: test-fseek, testmb, and testrand.
5491 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5492 These ports are not finished, but are a good starting place for really
5493 supporting those systems.
5495 * `/etc/localtime' is now the standard location for the file that says what
5496 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5497 This follows the general principle that `/etc' is the place for all local
5498 configuration files.
5500 * The C library header files now use `extern "C"' when used by the C++
5501 compiler, so the C library should now work with C++ code.
5503 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5504 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5507 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5508 function which uses the `merge sort' algorithm, and is said to be
5509 significantly faster than the old GNU `qsort' function. Merge sort is
5510 now the standard `qsort' function. The new algorithm can require a lot
5511 of temporary storage; so, the old sorting function is called when the
5512 required storage is not available.
5514 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5515 provides the Unix `crypt' function, plus some other entry points.
5517 * The code and header files taken from 4.4 BSD have been updated with the
5518 latest files released from Berkeley.
5520 ----------------------------------------------------------------------
5521 Copyright information:
5523 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5525 Permission is granted to anyone to make or distribute verbatim copies
5526 of this document as received, in any medium, provided that the
5527 copyright notice and this permission notice are preserved,
5528 thus giving the recipient permission to redistribute in turn.
5530 Permission is granted to distribute modified versions
5531 of this document, or of portions of it,
5532 under the above conditions, provided also that they
5533 carry prominent notices stating who last changed them.
5536 version-control: never