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 12.0.0 Support: Character encoding, character type info, and
13 transliteration tables are all updated to Unicode 12.0.0, 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 * On Linux, the gettid function has been added.
21 * Minguo (Republic of China) calendar support has been added as an
22 alternative calendar for the following locales: zh_TW, cmn_TW, hak_TW,
25 * The entry for the new Japanese era has been added for ja_JP locale.
27 Deprecated and removed features, and other changes affecting compatibility:
29 * The functions clock_gettime, clock_getres, clock_settime,
30 clock_getcpuclockid, clock_nanosleep were removed from the librt library
31 for new applications (on architectures which had them). Instead, the
32 definitions in libc will be used automatically, which have been available
35 * The obsolete and never-implemented XSI STREAMS header files <stropts.h>
36 and <sys/stropts.h> have been removed.
38 Changes to build and runtime requirements:
40 * GCC 6.2 or later is required to build the GNU C Library.
42 Older GCC versions and non-GNU compilers are still supported when
43 compiling programs that use the GNU C Library.
45 Security related changes:
47 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
48 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
49 has undefined behavior. On x32, the size_t argument may be passed
50 in the lower 32 bits of the 64-bit RDX register with non-zero upper
51 32 bits. When it happened with the sign bit of RDX register set,
52 memcmp gave the wrong result since it treated the size argument as
53 zero. Reported by H.J. Lu.
55 CVE-2019-9169: Attempted case-insensitive regular-expression match
56 via proceed_next_node in posix/regexec.c leads to heap-based buffer
57 over-read. Reported by Hongxu Chen.
59 The following bugs are resolved with this release:
61 [The release manager will add the list generated by
62 scripts/list-fixed-bugs.py just before the release.]
69 * The getcpu wrapper function has been added, which returns the currently
70 used CPU and NUMA node. This function is Linux-specific.
72 * A new convenience target has been added for distribution maintainers
73 to build and install all locales as directories with files. The new
74 target is run by issuing the following command in your build tree:
75 'make localedata/install-locale-files', with an optional DESTDIR
76 to set the install root if you wish to install into a non-default
79 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
81 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
82 for _GNU_SOURCE, to match BSD environments.
84 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
85 indicates that it will abort the transaction prior to entering the kernel
86 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
87 suspended, and this caused some undefined side-effects issues by aborting
88 transactions manually. Glibc avoided it by abort transactions manually on
89 each syscall, but it lead to performance issues on newer kernels where the
90 HTM state is saved and restore lazily (the state being saved even when the
91 process actually does not use HTM).
93 * The functions posix_spawn_file_actions_addchdir_np and
94 posix_spawn_file_actions_addfchdir_np have been added, enabling
95 posix_spawn and posix_spawnp to run the new process in a different
96 directory. These functions are GNU extensions. The function
97 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
100 * The popen and system do not run atfork handlers anymore (BZ#17490).
101 Although it is a possible POSIX violation, the POSIX rationale in
102 pthread_atfork documentation regarding atfork handlers is to handle
103 inconsistent mutex state after a fork call in a multi-threaded process.
104 In both popen and system there is no direct access to user-defined mutexes.
106 * Support for the C-SKY ABIV2 running on Linux has been added. This port
107 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
109 - C-SKY ABIV2 soft-float little-endian
110 - C-SKY ABIV2 hard-float little-endian
112 * strftime's default formatting of a locale's alternative year (%Ey)
113 has been changed to zero-pad the year to a minimum of two digits,
114 like "%y". This improves the display of Japanese era years during
115 the first nine years of a new era, and is expected to be harmless
116 for all other locales (only Japanese locales regularly have
117 alternative year numbers less than 10). Zero-padding can be
118 overridden with the '_' or '-' flags (which are GNU extensions).
120 * As a GNU extension, the '_' and '-' flags can now be applied to
121 "%EY" to control how the year number is formatted; they have the
122 same effect that they would on "%Ey".
124 Deprecated and removed features, and other changes affecting compatibility:
126 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
127 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
129 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
130 in <sys/procfs.h>, has been corrected to match the type actually used by
131 the Linux kernel. This affects the size and layout of that structure on
132 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
134 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
135 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
136 defined in <sys/procfs.h>, has been corrected to match the type actually
137 used by the Linux kernel. This affects the size and layout of those
140 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
141 meant to scan a string and allocate space for it with malloc, is now
142 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
143 defined. This extension conflicts with C99's use of '%a' to scan a
144 hexadecimal floating-point number, which is now available to programs
145 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
147 POSIX.1-2008 includes the feature of allocating a buffer for string input
148 with malloc, using the modifier letter 'm' instead. Programs using
149 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
150 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
151 C99 '%a' no longer need to avoid _GNU_SOURCE.
153 GCC's -Wformat warnings can detect most uses of this extension, as long
154 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
155 __attribute__ ((format (scanf, ...))).
157 Changes to build and runtime requirements:
159 * Python 3.4 or later is required to build the GNU C Library.
161 * On most architectures, GCC 5 or later is required to build the GNU C
162 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
164 Older GCC versions and non-GNU compilers are still supported when
165 compiling programs that use the GNU C Library.
167 Security related changes:
169 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
170 denial of service due to resource exhaustion when processing getaddrinfo
171 calls with crafted host names. Reported by Guido Vranken.
173 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
174 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
175 happened, accessing the 32-bit size_t value as the full 64-bit register
176 in the assembly string/memory functions would cause a buffer overflow.
179 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
180 addresses with arbitrary trailing characters, potentially leading to data
181 or command injection issues in applications.
183 The following bugs are resolved with this release:
185 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
186 [10496] localedata: 12h time representation in multiple locales faulty
187 [10797] localedata: it_IT locale numeric does not have a separator for
189 [11319] libc: dprintf doesn't handle errors properly
190 [16346] time: mktime: potentially unsafe use of localtime_offset
191 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
193 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
194 posix_spawn_file_actions_addfchdir_np
195 [17426] localedata: Indian locales: set the correct date format
196 [17490] stdio: popen should not invoke atfork handlers
197 [17783] libc: TIOCSER_TEMT conditions inconsistent
198 [18040] regex: use-after-free in regexec/get_subexp
199 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
200 [20018] network: getaddrinfo should reject IP addresses with trailing
201 characters (CVE-2016-10739)
202 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
203 [20271] libc: Missing "\n" in __libc_fatal calls
204 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
205 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
206 pointer argument is non-NULL
207 [21037] stdio: open_memstream and freopen
208 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
209 [21716] time: Crash in glibc's mktime in low-memory situations
210 [22834] stdio: Subprocess forked by popen may crash in Linux when
211 multithreads call popen
212 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
213 and pthread_create fails.
214 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
215 [23125] libc: riscv64: endless loop when throwing an exception from a
217 [23275] nptl: Race in pthread_mutex_lock while promoting to
218 PTHREAD_MUTEX_ELISION_NP.
219 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
221 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
223 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
225 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
226 [23509] dynamic-link: CET enabled glibc is incompatible with the older
228 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
229 [23521] nss: get_next_alias nss_files file stream leak
230 [23538] nptl: Hang in pthread_cond_broadcast
231 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
232 [23578] regex: Invalid memory access if regex pattern contains NUL byte
233 [23579] libc: Errors misreported in preadv2
234 [23597] build: support/test-container.c doesn't work with different
236 [23603] time: mktime signed integer overflow on large timestamps
237 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
238 [23614] libc: powerpc: missing CFI register information in __mpn_*
240 [23637] string: Generic strstr/strcasestr fails with huge needles
241 [23640] libc: no way to easily clear FD_CLOEXEC in
242 posix_spawn_file_actions_adddup2()
243 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
245 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
247 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
248 [23689] libc: Bug in documentation for rusage.ru_ixrss in
249 bits/types/struct_rusage.h
250 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
252 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
254 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
255 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
256 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
258 [23724] localedata: Albanian date formats are incorrect
259 [23735] math: libnldbl_nonshared.a references internal libm symbols
260 [23740] localedata: kl_GL: Month names and date formats need update
261 [23744] regex: regex refactorings to remove BE, avoid duplication
262 [23745] time: mktime fix for Gnulib + coreutils
263 [23758] time: Improve the width of alternate representation for year in
265 [23783] libc: [mips] Missing CMSPAR bits/termios.h
266 [23789] time: mktime does not set errno on failure
267 [23791] localedata: Wrong monetary format for ca_ES locale
268 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
269 [23794] locale: c16rtomb does not handle surrogate pairs
270 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
271 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
272 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
273 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
274 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
275 [23862] libc: [sh] missing kernel-features.h undefines
276 [23864] libc: [riscv] missing kernel-features.h undefines
277 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
278 [23907] malloc: Incorrect double-free malloc tcache check disregards
280 [23913] libc: off-by-one in function maybe_script_execute in
281 sysdeps/posix/spawni.c
282 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
283 [23923] locale: Add --no-hard-links option to localedef
284 [23927] network: Linux if_nametoindex() does not close descriptor
286 [23961] math: powf can overflow to inf without setting errno in non-
287 nearest rounding mode
288 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
289 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
290 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
291 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
292 [24011] localedata: Fixed small type in comment for locale bs_BA
293 [24018] libc: gettext() may return NULL
294 [24022] build: riscv build failure with Linux kernel 4.20-rc7
295 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
296 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
298 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
299 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
301 [24046] localedata: en_US locale doesn't define date_fmt
302 [24063] manual: @var{errno} should be @code{errno}
303 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
304 [24088] libc: VSCR field is not being correctly read in ucontext_t on
306 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
308 [24097] string: Can't use 64-bit register for size_t in assembly codes for
310 [24110] hurd: SS_DISABLE never set in stack_t value returned by
312 [24112] network: Do not send DNS queries for non-host names (where all
313 answers will be rejected)
314 [24130] libc: alpha __remqu corrupts $f3 register
321 * The localization data for ISO 14651 is updated to match the 2016
322 Edition 4 release of the standard, this matches data provided by
323 Unicode 9.0.0. This update introduces significant improvements to the
324 collation of Unicode characters. This release deviates slightly from
325 the standard in that the collation element ordering for lowercase and
326 uppercase LATIN script characters is adjusted to ensure that regular
327 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
328 is not matched by [a-z]. With the update many locales have been
329 updated to take advantage of the new collation information. The new
330 collation information has increased the size of the compiled locale
331 archive or binary locales.
333 * The GNU C Library can now be compiled with support for Intel CET, AKA
334 Intel Control-flow Enforcement Technology. When the library is built
335 with --enable-cet, the resulting glibc is protected with indirect
336 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
337 compatible with all existing executables and shared libraries. This
338 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
339 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
340 capable of multi-byte NOPs, like x86-64 processors as well as Intel
341 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
342 x86_64 and x32 on non-CET processors. --enable-cet has been tested
343 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
346 * The GNU C Library now has correct support for ABSOLUTE symbols
347 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
348 relocated incorrectly or in some cases discarded. The GNU linker can
349 make use of the newer semantics, but it must communicate it to the
350 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
351 field) to indicate such support is required.
353 * Unicode 11.0.0 Support: Character encoding, character type info, and
354 transliteration tables are all updated to Unicode 11.0.0, using
355 generator scripts contributed by Mike FABIAN (Red Hat).
357 * <math.h> functions that round their results to a narrower type are added
358 from TS 18661-1:2014 and TS 18661-3:2015:
360 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
363 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
366 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
369 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
372 * Two grammatical forms of month names are now supported for the following
373 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
374 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
375 support two grammatical forms in abbreviated month names: Catalan, Greek,
378 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
379 include the support for two grammatical forms of month names.
381 * Building and running on GNU/Hurd systems now works without out-of-tree
384 * The renameat2 function has been added, a variant of the renameat function
385 which has a flags argument. If the flags are zero, the renameat2 function
386 acts like renameat. If the flag is not zero and there is no kernel
387 support for renameat2, the function will fail with an errno value of
388 EINVAL. This is different from the existing gnulib function renameatu,
389 which performs a plain rename operation in case of a RENAME_NOREPLACE
390 flags and a non-existing destination (and therefore has a race condition
391 that can clobber the destination inadvertently).
393 * The statx function has been added, a variant of the fstatat64
394 function with an additional flags argument. If there is no direct
395 kernel support for statx, glibc provides basic stat support based on
396 the fstatat64 function.
398 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
399 library if installed. libidn2 version 2.0.5 or later is recommended. If
400 libidn2 is not available, internationalized domain names are not encoded
401 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
402 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
403 with an encoding error.) Flags which used to change the IDN encoding and
404 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
405 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
406 deprecated. They no longer have any effect.
408 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
409 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
410 range of ELF gABI expressions including such constructs as
411 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
412 have been further restricted, and where in the past a dynamic string
413 token sequence may have been interpreted as a literal string it will
414 now cause a load failure. These load failures were always considered
415 unspecified behaviour from the perspective of the dynamic loader, and
416 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
417 results in a load failure now.
419 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
420 implementation includes all the standard functions provided by
423 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
424 thrd_detach, thrd_exit, and thrd_join for thread management.
426 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
427 mtx_destroy for mutual exclusion.
429 - call_once for function call synchronization.
431 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
432 cnd_wait for conditional variables.
434 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
436 Application developers must link against libpthread to use ISO C threads.
438 Deprecated and removed features, and other changes affecting compatibility:
440 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
441 installed. Software that was using either header should be updated to
442 use standard <stdio.h> interfaces instead.
444 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
445 This was never required by the C standard, and the macros just expanded
446 to call alternative names for the same functions. If you hoped getc and
447 putc would provide performance improvements over fgetc and fputc, instead
448 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
449 necessary, flockfile and funlockfile.
451 * All stdio functions now treat end-of-file as a sticky condition. If you
452 read from a file until EOF, and then the file is enlarged by another
453 process, you must call clearerr or another function with the same effect
454 (e.g. fseek, rewind) before you can read the additional data. This
455 corrects a longstanding C99 conformance bug. It is most likely to affect
456 programs that use stdio to read interactive input from a terminal.
459 * The macros 'major', 'minor', and 'makedev' are now only available from
460 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
461 headers that happen to include <sys/types.h>. These macros are rarely
462 used, not part of POSIX nor XSI, and their names frequently collide with
463 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
466 <sys/sysmacros.h> is a GNU extension. Portable programs that require
467 these macros should first include <sys/types.h>, and then include
468 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
470 * The tilegx*-*-linux-gnu configurations are no longer supported.
472 * The obsolete function ustat is no longer available to newly linked
473 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
474 function has been deprecated in favor of fstatfs and statfs.
476 * The obsolete function nfsservctl is no longer available to newly linked
477 binaries. This function was specific to systems using the Linux kernel
478 and could not usefully be used with the GNU C Library on systems with
479 version 3.1 or later of the Linux kernel.
481 * The obsolete function name llseek is no longer available to newly linked
482 binaries. This function was specific to systems using the Linux kernel
483 and was not declared in a header. Programs should use the lseek64 name
484 for this function instead.
486 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
487 getaddrinfo and getnameinfo functions have been deprecated. The behavior
488 previously selected by them is now always enabled.
490 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
491 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
492 restriction (rejecting '_' in host names, among other things) has been
493 removed, for increased compatibility with non-IDN name resolution.
495 * The fcntl function now have a Long File Support variant named fcntl64. It
496 is added to fix some Linux Open File Description (OFD) locks usage on non
497 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
498 fcntl and LFS support is handled transparently. Also for Linux, the OFD
499 locks act as a cancellation entrypoint.
501 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
502 ecb_crypt, and des_setparity are no longer available to newly linked
503 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
504 longer installed. These functions encrypted and decrypted data with the
505 DES block cipher, which is no longer considered secure. Software that
506 still uses these functions should switch to a modern cryptography library,
509 * Reflecting the removal of the encrypt and setkey functions above, the
510 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
511 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
514 * The obsolete function fcrypt is no longer available to newly linked
515 binaries. It was just another name for the standard function crypt,
516 and it has not appeared in any header file in many years.
518 * We have tentative plans to hand off maintenance of the passphrase-hashing
519 library, libcrypt, to a separate development project that will, we hope,
520 keep up better with new passphrase-hashing algorithms. We will continue
521 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
522 'crypt_r' should not need to change at all; however, distributions will
523 need to install <crypt.h> and libcrypt from a separate project.
525 In this release, if the configure option --disable-crypt is used, glibc
526 will not install <crypt.h> or libcrypt, making room for the separate
527 project's versions of these files. The plan is to make this the default
528 behavior in a future release.
530 Changes to build and runtime requirements:
532 GNU make 4.0 or later is now required to build glibc.
534 Security related changes:
536 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
537 been fixed by removing the glibc-internal IDNA implementation and using
538 the system-provided libidn2 library instead. Originally reported by Hanno
539 Böck and Christian Weisgerber.
541 CVE-2017-18269: An SSE2-based memmove implementation for the i386
542 architecture could corrupt memory. Reported by Max Horn.
544 CVE-2018-11236: Very long pathname arguments to realpath function could
545 result in an integer overflow and buffer overflow. Reported by Alexey
548 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
549 architecture could write beyond the target buffer, resulting in a buffer
550 overflow. Reported by Andreas Schwab.
552 The following bugs are resolved with this release:
554 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
555 [6889] manual: 'PWD' mentioned but not specified
556 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
557 when __WORDSIZE != 64
558 [13762] regex: re_search etc. should return -2 on memory exhaustion
559 [13888] build: /tmp usage during testing
560 [13932] math: dbl-64 pow unexpectedly slow for some inputs
561 [14092] nptl: Support C11 threads
562 [14095] localedata: Review / update collation data from Unicode / ISO
564 [14508] libc: -Wformat warnings
565 [14553] libc: Namespace pollution loff_t in sys/types.h
566 [14890] libc: Make NT_PRFPREG canonical.
567 [15105] libc: Extra PLT references with -Os
568 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
570 [16335] manual: Feature test macro documentation incomplete and out of
572 [16552] libc: Unify umount implementations in terms of umount2
573 [17082] libc: htons et al.: statement-expressions prevent use on global
574 scope with -O1 and higher
575 [17343] libc: Signed integer overflow in /stdlib/random_r.c
576 [17438] localedata: pt_BR: wrong d_fmt delimiter
577 [17662] libc: please implement binding for the new renameat2 syscall
578 [17721] libc: __restrict defined as /* Ignore */ even in c11
579 [17979] libc: inconsistency between uchar.h and stdint.h
580 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
581 [18023] libc: extend_alloca is broken (questionable pointer comparison,
582 horrible machine code)
583 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
585 [18471] libc: llseek should be a compat symbol
586 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
588 [18991] nss: nss_files skips large entry in database
589 [19239] libc: Including stdlib.h ends up with macros major and minor being
591 [19463] libc: linknamespace failures when compiled with -Os
592 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
593 [19527] locale: Normalized charset name not recognized by setlocale
594 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
595 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
597 [19728] network: out of bounds stack read in libidn function
598 idna_to_ascii_4i (CVE-2016-6261)
599 [19729] network: out of bounds heap read on invalid utf-8 inputs in
600 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
601 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
603 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
604 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
605 [20419] dynamic-link: files with large allocated notes crash in
607 [20530] libc: bswap_16 should use __builtin_bswap16() when available
608 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
609 [20980] manual: CFLAGS environment variable replaces vital options
610 [21163] regex: Assertion failure in pop_fail_stack when executing a
611 malformed regexp (CVE-2015-8985)
612 [21234] manual: use of CFLAGS makes glibc detect no optimization
613 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
614 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
615 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
616 [21508] locale: intl/tst-gettext failure with latest msgfmt
617 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
618 [21812] network: getifaddrs() returns entries with ifa_name == NULL
619 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
621 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
623 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
624 [22247] network: Integer overflow in the decode_digit function in
625 puny_decode.c in libidn (CVE-2017-14062)
626 [22342] nscd: NSCD not properly caching netgroup
627 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
628 [22550] localedata: es_ES locale (and other es_* locales): collation
629 should treat ñ as a primary different character, sync the collation
630 for Spanish with CLDR
631 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
632 by gcc configured with --enable-default-pie
633 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
634 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
635 crossing 2GB threshold (CVE-2017-18269)
636 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
638 [22735] time: Misleading typo in time.h source comment regarding
640 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
641 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
642 `__assert_perror_fail ()' to `__assert_fail_base ()'
643 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
645 [22786] libc: Stack buffer overflow in realpath() if input size is close
646 to SSIZE_MAX (CVE-2018-11236)
647 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
648 through an absolute DT_NEEDED path
649 [22792] build: tcb-offsets.h dependency dropped
650 [22797] libc: pkey_get() uses non-reserved name of argument
651 [22807] libc: PTRACE_* constants missing for powerpc
652 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
653 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
654 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
655 [22848] localedata: ca_ES: update date definitions from CLDR
656 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
657 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
658 [22896] localedata: Update locale data for an_ES
659 [22902] math: float128 test failures with GCC 8
660 [22918] libc: multiple common of `__nss_shadow_database'
661 [22919] libc: sparc32: backtrace yields infinite backtrace with
663 [22926] libc: FTBFS on powerpcspe
664 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
666 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
667 [22947] libc: FAIL: misc/tst-preadvwritev2
668 [22963] localedata: cs_CZ: Add alternative month names
669 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
670 [22996] localedata: change LC_PAPER to en_US in es_BO locale
671 [22998] dynamic-link: execstack tests are disabled when SELinux is
673 [23005] network: Crash in __res_context_send after memory allocation
675 [23007] math: strtod cannot handle -nan
676 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
677 [23036] regex: regex equivalence class regression
678 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
679 [23069] libc: sigaction broken on riscv64-linux-gnu
680 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
681 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
682 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
683 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
684 and libc build with -Os)
685 [23140] localedata: More languages need two forms of month names
686 [23145] libc: _init/_fini aren't marked as hidden
687 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
688 [23171] math: C++ iseqsig for long double converts arguments to double
689 [23178] nscd: sudo will fail when it is run in concurrent with commands
690 that changes /etc/passwd
691 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
693 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
694 [23208] localedata: New locale - Lower Sorbian (dsb)
695 [23233] regex: Memory leak in build_charclass_op function in file
697 [23236] stdio: Harden function pointers in _IO_str_fields
698 [23250] nptl: Offset of __private_ss differs from GCC
699 [23253] math: tgamma test suite failures on i686 with -march=x86-64
700 -mtune=generic -mfpmath=sse
701 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
703 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
704 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
706 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
707 [23277] math: nan function should not have const attribute
708 [23279] math: scanf and strtod wrong for some hex floating-point
709 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
711 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
712 [23303] build: undefined reference to symbol
713 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
714 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
716 [23313] stdio: libio vtables validation and standard file object
718 [23329] libc: The __libc_freeres infrastructure is not properly run across
720 [23349] libc: Various glibc headers no longer compatible with
722 [23351] malloc: Remove unused code related to heap dumps and malloc
724 [23363] stdio: stdio-common/tst-printf.c has non-free license
725 [23396] regex: Regex equivalence regression in single-byte locales
726 [23422] localedata: oc_FR: More updates of locale data
727 [23442] build: New warning with GCC 8
728 [23448] libc: Out of bounds access in IBM-1390 converter
729 [23456] libc: Wrong index_cpu_LZCNT
730 [23458] build: tst-get-cpu-features-static isn't added to tests
731 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
733 [23467] dynamic-link: x86/CET: A property note parser bug
740 * The GNU C Library can now be compiled with support for building static
741 PIE executables (See --enable-static-pie in INSTALL). These static PIE
742 executables are like static executables but can be loaded at any address
743 and provide additional security hardening benefits at the cost of some
744 memory and performance. When the library is built with --enable-static-pie
745 the resulting libc.a is usable with GCC 8 and above to create static PIE
746 executables using the GCC option '-static-pie'. This feature is currently
747 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
748 aarch64 with binutils 2.30 or later.
750 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
751 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
754 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
756 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
758 * In order to support faster and safer process termination the malloc API
759 family of functions will no longer print a failure address and stack
760 backtrace after detecting heap corruption. The goal is to minimize the
761 amount of work done after corruption is detected and to avoid potential
762 security issues in continued process execution. Reducing shutdown time
763 leads to lower overall process restart latency, so there is benefit both
764 from a security and performance perspective.
766 * The abort function terminates the process immediately, without flushing
767 stdio streams. Previous glibc versions used to flush streams, resulting
768 in deadlocks and further data corruption. This change also affects
769 process aborts as the result of assertion failures.
771 * On platforms where long double has the IEEE binary128 format (aarch64,
772 alpha, mips64, riscv, s390 and sparc), the math library now implements
773 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
774 These are the same interfaces added in version 2.26 for some platforms where
775 this format is supported but is not the format of long double.
777 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
778 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
779 implements interfaces for that type, as defined by ISO/IEC TS
780 18661-3:2015. These are corresponding interfaces to those supported for
783 * The math library now implements interfaces for the _Float32, _Float64 and
784 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
785 corresponding interfaces to those supported for _Float128.
787 * glibc now implements the memfd_create and mlock2 functions on Linux.
789 * Support for memory protection keys was added. The <sys/mman.h> header now
790 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
793 * The copy_file_range function was added.
795 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
797 * The ldconfig utility now processes `include' directives using the C/POSIX
798 collation ordering. Previous glibc versions used locale-specific
799 ordering, the change might break systems that relied on that.
801 * Support for two grammatical forms of month names has been added.
802 In a call to strftime, the "%B" and "%b" format specifiers will now
803 produce the grammatical form required when the month is used as part
804 of a complete date. New "%OB" and "%Ob" specifiers produce the form
805 required when the month is named by itself. For instance, in Greek
806 and in many Slavic and Baltic languages, "%B" will produce the month
807 in genitive case, and "%OB" will produce the month in nominative case.
809 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
810 are all valid and will all accept any known form of month
811 name---standalone or complete, abbreviated or full. In a call to
812 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
813 the strings used by "%B" and "%b", respectively. New query
814 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
815 used by "%OB" and "%Ob", respectively.
817 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
818 define the strings for %OB and %Ob, respectively; these have the
819 same syntax as "mon" and "abmon". These arrays are optional; if they
820 are not provided then they have the same content as "mon" and "abmon",
823 These features are provided for locales which define "alt_mon" and/or
824 "ab_alt_mon" in their locale source data. This release includes such
825 alternative month name data for the following languages: Belarusian,
826 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
828 This feature is currently a GNU extension, but it is expected to
829 be added to the next revision of POSIX, and it is also already
830 available on some BSD-derived operating systems.
832 This feature will cause existing statically compiled applications
833 to fail to load locales and fall back to the builtin C/POSIX locales.
834 See notes below for other changes affecting compatibility.
836 * Support for the RISC-V ISA running on Linux has been added. This port
837 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
838 for the following ISA and ABI pairs:
844 Deprecated and removed features, and other changes affecting compatibility:
846 * Statically compiled applications attempting to load locales compiled for the
847 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
848 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
849 support for two grammatical forms of the month names, also extends the locale
850 data binary format. Static applications needing locale support must be
851 recompiled to match the runtime and data they are deployed with. In some
852 distributions there is an upgrade window where dynamically linked applications
853 may use a new library but the old locale data and also fall back to the
854 builtin C/POSIX locales; restarting the application process is sufficient to
857 * Support for statically linked applications which call dlopen is deprecated
858 and will be removed in a future version of glibc. Applications which call
859 dlopen need to be linked dynamically instead.
861 * Support for old programs which use internal stdio data structures and
862 functions is deprecated. This includes programs which use the C++ streams
863 provided by libstdc++ in GCC 2.95. Programs which use the internal
864 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
865 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
866 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
867 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
868 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
869 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
870 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
871 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
872 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
873 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
874 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
875 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
876 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
877 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
878 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
879 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
880 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
881 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
882 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
883 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
884 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
885 future version of glibc. Unlike other symbol removals, these old
886 applications will not be supported using compatibility symbols.
888 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
889 defined by <sys/ptrace.h>.
891 * libm no longer supports SVID error handling (calling a user-provided
892 matherr function on error) or the _LIB_VERSION variable to control error
893 handling. (SVID error handling and the _LIB_VERSION variable still work
894 for binaries linked against older versions of the GNU C Library.) The
895 libieee.a library is no longer provided. math.h no longer defines struct
896 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
897 TLOSS, PLOSS and HUGE.
899 * The libm functions pow10, pow10f and pow10l are no longer supported for
900 new programs. Programs should use the standard names exp10, exp10f and
901 exp10l for these functions instead.
903 * The mcontext_t type is no longer the same as struct sigcontext. On
904 platforms where it was previously the same, this changes the C++ name
905 mangling for interfaces involving this type.
907 * The add-ons mechanism for building additional packages at the same time as
908 glibc has been removed. The --enable-add-ons configure option is now
911 * The --without-fp configure option is now ignored. Whether hardware
912 floating-point instructions are used is now configured based on whether
913 the compiler used at configure time (without any options implied by a
914 --with-cpu= configure option) uses such instructions.
916 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
917 the specified string can be parsed as a domain name.
919 * In the malloc_info output, the <heap> element may contain another <aspace>
920 element, "subheaps", which contains the number of sub-heaps.
922 * The libresolv function p_secstodate is no longer supported for new
925 * The tilepro-*-linux-gnu configuration is no longer supported.
927 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
928 and will be removed in a future release. Software that is still using
929 either header should be updated to use standard <stdio.h> interfaces
932 libio.h was originally the header for a set of supported GNU extensions,
933 but they have not been maintained as such in many years, they are now
934 standing in the way of improvements to stdio, and we don't think there are
935 any remaining external users. _G_config.h was never intended for public
936 use, but predates the bits convention.
938 Changes to build and runtime requirements:
940 * bison version 2.7 or later is required to generate code in the 'intl'
943 Security related changes:
945 CVE-2009-5064: The ldd script would sometimes run the program under
946 examination directly, without preventing code execution through the
947 dynamic linker. (The glibc project disputes that this is a security
948 vulnerability; only trusted binaries must be examined using the ldd
951 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
952 suffered from a one-byte overflow during ~ operator processing (either
953 on the stack or the heap, depending on the length of the user name).
954 Reported by Tim Rühsen.
956 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
957 would sometimes fail to free memory allocated during ~ operator
958 processing, leading to a memory leak and, potentially, to a denial
961 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
962 without GLOB_NOESCAPE, could write past the end of a buffer while
963 unescaping user names. Reported by Tim Rühsen.
965 CVE-2017-17426: The malloc function, when called with an object size near
966 the value SIZE_MAX, would return a pointer to a buffer which is too small,
967 instead of NULL. This was a regression introduced with the new malloc
968 thread cache in glibc 2.26. Reported by Iain Buclaw.
970 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
971 to the allocation of too much memory. (This is not a security bug per se,
972 it is mentioned here only because of the CVE assignment.) Reported by
975 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
976 of the number of search path components. (This is not a security
977 vulnerability per se because no trust boundary is crossed if the fix for
978 CVE-2017-1000366 has been applied, but it is mentioned here only because
979 of the CVE assignment.) Reported by Qualys.
981 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
982 for AT_SECURE or SUID binaries could be used to load libraries from the
985 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
986 succeeds without returning an absolute path due to unexpected behaviour
987 of the Linux kernel getcwd syscall. Reported by halfdog.
989 CVE-2018-6485: The posix_memalign and memalign functions, when called with
990 an object size near the value of SIZE_MAX, would return a pointer to a
991 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
993 CVE-2018-6551: The malloc function, when called with an object size near
994 the value of SIZE_MAX, would return a pointer to a buffer which is too
995 small, instead of NULL.
997 The following bugs are resolved with this release:
999 [866] glob: glob should match dangling symlinks
1000 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1001 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1003 [5997] math: Very slow execution of sinf function
1004 [10580] localedata: hr_HR: updated locale
1005 [10871] locale: 'mon' array should contain both nominative and genitive
1007 [12349] localedata: eu_ES: incorrect thousands separator
1008 [13605] localedata: shn_MM: new Shan locale
1009 [13805] localedata: ru_RU: currency should use ',' as radix point
1010 [13953] localedata: km_KH: locale update
1011 [13994] localedata: mjw_IN: new locale
1012 [14121] build: make writes .mo files in po directory
1013 [14333] libc: Fix the race between atexit() and exit()
1014 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1015 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1017 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1018 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1019 width Latin characters
1020 [15332] localedata: es_CU: locale update
1021 [15436] stdio: Don't close or flush stdio streams on abort
1022 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1024 [16148] localedata: ca_ES: incorrect thousands separator
1025 [16750] dynamic-link: ldd should not try to execute the binaries
1027 [16777] localedata: pl_PL: incorrect thousands separator in locale
1028 [16905] localedata: hanzi: new collation
1029 [17563] localedata: cmn_TW: add hanzi collation
1030 [17750] localedata: wrong collation order of diacritics in most locales
1031 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1033 [17956] build: Build fails on missing definitions from header file
1034 nss/nss.h when Mozilla NSS is used for cryptography
1035 [18203] libc: realpath() does not handle unreachable paths correctly
1036 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1037 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1038 [18822] libc: Internal functions are called via PLT
1039 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1040 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1041 [19574] libc: glibc should support building static PIE binaries
1042 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1044 [19971] glob: glob: Do not skip entries with zero d_ino values
1045 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1046 [20008] localedata: km_KH: convert to translit_neutral
1047 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1048 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1049 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1050 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1051 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
1053 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1054 they're set, wrong errors returned by gaih_inet when lookup functions
1056 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1057 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1059 [20952] localedata: yuw_PG: new locale
1060 [21084] localedata: charmaps/IBM858: new codepage
1061 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1062 [21242] libc: assert gives pedantic warning in old gcc versions
1063 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1064 __regcall calling convention
1065 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1066 [21326] libc: C99 functions are not declared for C++11 and later if
1067 _GNU_SOURCE is not predefined by g++
1068 [21457] libc: sys/ucontext.h namespace
1069 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1070 [21660] math: GCC fails to compile a formula with tgmath.h
1071 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1072 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1073 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1074 [21684] math: tgmath.h handling of complex integers
1075 [21685] math: tgmath.h handling of bit-fields
1076 [21686] math: tgmath.h handling of __int128
1077 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1079 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1081 [21750] localedata: column width of characters incompatible with classical
1083 [21754] malloc: malloc: Perform as little work as possible after heap
1084 consistency check failures
1085 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1086 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1087 [21791] string: Unused XXX_chk_XXX functions in libc.a
1088 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1090 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1092 [21845] localedata: Added new Locale bho_NP
1093 [21853] localedata: Fix abday Which looks same as day in zh_SG
1094 [21854] localedata: Added New Locale en_SC
1095 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1096 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1097 _dl_runtime_resolve_avx_slow
1098 [21885] network: getaddrinfo: gethosts does not release resolver context
1099 on memory allocation failure
1100 [21899] libc: XPG4.2 sigaction namespace
1101 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1103 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1105 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1106 errno value, causing getaddrinfo to fail
1107 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1108 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1109 instead of EAI_NODATA
1110 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1111 constant PTRACE_SEIZE_DEVEL
1112 [21930] math: C-only gcc builtins used in <math.h> isinf
1113 [21932] network: Unpaired __resolv_context_get in generic get*_r
1115 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1116 [21944] libc: sigval namespace
1117 [21951] localedata: Update hanzi collation by stroke
1118 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1119 sysdeps/x86_64/fpu/e_expf.S
1120 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1121 allocation in syscall loops)
1122 [21959] localedata: Fix Country name for xh_ZA
1123 [21960] localedata: Fix abmon for bem_ZM
1124 [21966] math: AVX2 mathvec functions use FMA without checking
1125 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1126 [21971] localedata: Added New Locale for mfe_MU
1127 [21972] libc: assert macro requires operator== (int) for its argument type
1128 [21973] math: [sparc] libm missing sqrtl compat symbol
1129 [21974] libc: Remove __bb_init_func and __bb_exit_func
1130 [21982] string: stratcliff.c: error: assuming signed overflow does not
1132 [21986] stdio: __guess_grouping is called incorrectly
1133 [21987] math: [sparc32] wrong bits/long-double.h installed
1134 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1136 [22022] localedata: Missing country_name for mni_IN
1137 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1139 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1141 [22026] locale: iconv_open: heap overflow on gconv_init failure
1142 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1143 [22035] math: [m68k] bits/math-inline.h macro namespace
1144 [22038] localedata: Fix abbreviated weeks and months for Somali
1145 [22044] localedata: Remove redundant data for Limburgish Language
1146 [22050] malloc: Linking with -lmcheck does not hook
1147 __malloc_initialize_hook correctly
1148 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1149 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1150 [22070] localedata: charmaps/UTF-8: wcwidth for
1151 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1152 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1153 Jungseong and Jongseong) should be 0
1154 [22078] nss: nss_files performance issue in multi mode
1155 [22082] math: bits/math-finite.h exp10 condition
1156 [22086] libc: pcprofiledump incorrect cross-endian condition
1157 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1158 [22095] network: Name server address allocation memory leak in resolv.conf
1160 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1162 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1163 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1165 [22111] malloc: malloc: per thread cache is not returned when thread exits
1166 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1167 [22134] libc: [linux] implement fexecve with execveat
1168 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1170 [22145] libc: ttyname() gives up too early in the face of namespaces
1171 [22146] math: C++ build issue with float128 on x86_64
1172 [22153] nptl: nptl: save error code before process termination
1173 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1174 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1175 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1176 [22165] libc: [hppa] Text relocations in libc.so
1177 [22180] libc: destructor registered via __cxa_atexit is called twice
1178 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1179 symlinks") cause "make" segfaults
1180 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1182 [22207] libc: FAIL: stdlib/test-atexit-race
1183 [22225] math: nearbyint arithmetic moved before feholdexcept
1184 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1185 [22235] math: iscanonical in C++ and float128
1186 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1187 the svid compat wrapper
1188 [22244] math: ynf and yn are wrong without the svid compat wrapper
1189 [22273] libc: Improper assert in Linux posix_spawn implementation
1190 [22284] libc: -pg -pie doesn't work
1191 [22292] locale: localedef exits with error 4 when it should be error 1
1192 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1193 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1195 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1196 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1198 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1199 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1200 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1201 [22322] libc: [mips64] wrong bits/long-double.h installed
1202 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1203 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1205 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1206 [22343] malloc: Integer overflow in posix_memalign
1207 [22347] libc: getrandom() returns the number of bytes that were copied to
1208 the buffer even though the comments say "Return 0 on success and -1 on
1210 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1211 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1213 [22370] dynamic-link: Incorrect note padding check
1214 [22375] libc: malloc returns pointer from tcache_get when should return
1215 NULL (CVE-2017-17426)
1216 [22377] math: iseqsig, float128 and C++
1217 [22382] localedata: Error in tpi_PG locale
1218 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1219 inside the ASCII printable range
1220 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1222 [22403] localedata: Slash needs escaping in some locales
1223 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1224 [22409] network: res_hnok does not accept some host names used on the
1226 [22412] network: res_dnok, res_hnok should perform syntax checks
1227 [22413] network: ns_name_pton ignores syntactically invalid trailing
1229 [22415] stdio: setvbuf can lead to invalid free/segfault
1230 [22432] build: Non-deterministic build
1231 [22439] malloc: malloc_info should compute summary statistics for all sub-
1233 [22442] network: if_nametoindex could report index for the wrong
1234 networking interface
1235 [22446] build: aliasing violation calling readlink in handle_request
1236 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1237 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1238 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1239 __nscd_hash/__nss_hash
1240 [22463] network: p_secstodate overflow handling
1241 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1242 [22478] libc: sigwait can fail with EINTR
1243 [22505] libc: ldconfig processes include directive in locale-specific
1245 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1246 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1247 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1248 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1249 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1250 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1251 same as for Croatian
1252 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1253 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1254 [22577] libc: missing newline after "cannot allocate TLS data structures
1256 [22588] manual: manual/conf.texi: missing underscore in front of
1258 [22593] math: nextafter and nexttoward are declared with const attribute
1259 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1260 [22603] string: ia64 memchr overflows internal pointer check
1261 [22605] libc: SH clone does not set the exit code correctly
1262 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1264 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1265 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1266 modified in case of success
1267 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
1268 [22615] manual: manual: ambiguous wording about errno value in case of
1270 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1272 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1273 binaries or if /proc is not mounted (CVE-2017-16997)
1274 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1275 [22630] build: $(no-pie-ldflag) is no longer effective
1276 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1277 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1278 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1279 [22637] nptl: guard size is subtracted from thread stack size instead of
1281 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1282 [22657] localedata: hu_HU: Avoid double space in date
1283 [22660] math: fmax, fmin sNaN handling on alpha
1284 [22664] libc: New warning of GCC8
1285 [22665] math: alpha: ceil and floor raise inexact exceptions
1286 [22666] math: alpha: trunc raise inexact exceptions
1287 [22667] libc: makecontext lacks stack alignment on i386
1288 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1289 [22679] libc: getcwd(3) can succeed without returning an absolute path
1291 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1292 elision and tunables
1293 [22687] math: [powerpc-nofpu] complex long double functions spurious
1295 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1296 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1297 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1299 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1300 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1302 [22701] nis: Incomplete removal of libnsl
1303 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1304 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1305 [22715] dynamic-link: FAIL: elf/tst-audit10
1306 [22719] libc: Backtrace tests fail on hppa
1307 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1308 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1309 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1310 before the first call to crypt_r () in crypt/badsalttest.c
1317 * A per-thread cache has been added to malloc. Access to the cache requires
1318 no locks and therefore significantly accelerates the fast path to allocate
1319 and free small amounts of memory. Refilling an empty cache requires locking
1320 the underlying arena. Performance measurements show significant gains in a
1321 wide variety of user workloads. Workloads were captured using a special
1322 instrumented malloc and analyzed with a malloc simulator. Contributed by
1323 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1325 * Unicode 10.0.0 Support: Character encoding, character type info, and
1326 transliteration tables are all updated to Unicode 10.0.0, using
1327 generator scripts contributed by Mike FABIAN (Red Hat).
1328 These updates cause user visible changes, especially the changes in
1329 wcwidth for many emoji characters cause problems when emoji sequences
1330 are rendered with pango, see for example:
1331 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1333 * Collation of Hungarian has been overhauled and is now consistent with "The
1334 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1337 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1339 - The GNU C Library will now detect when /etc/resolv.conf has been
1340 modified and reload the changed configuration. The new resolver option
1341 “no-reload” (RES_NORELOAD) disables this behavior.
1343 - The GNU C Library now supports an arbitrary number of search domains
1344 (configured using the “search” directive in /etc/resolv.conf);
1345 previously, there was a hard limit of six domains. For backward
1346 compatibility, applications that directly modify the ‘_res’ global
1347 object are still limited to six search domains.
1349 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
1350 Library will now randomly pick a name server from the configuration as a
1351 starting point. (Previously, the second name server was always used.)
1353 * The tunables feature is now enabled by default. This allows users to tweak
1354 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1356 * New function reallocarray, which resizes an allocated block (like realloc)
1357 to the product of two sizes, with a guaranteed clean failure upon integer
1358 overflow in the multiplication. Originally from OpenBSD, contributed by
1359 Dennis Wölfing and Rüdiger Sonderfeld.
1361 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1362 These are extended versions of preadv and pwritev, respectively, taking an
1363 additional flags argument. The set of supported flags depends on the
1364 running kernel; full support currently requires kernel 4.7 or later.
1366 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1367 create a new session ID for the spawned process. This feature is
1368 scheduled to be added to the next major revision of POSIX; for the time
1369 being, it is available under _GNU_SOURCE.
1371 * errno.h is now safe to use from C-preprocessed assembly language on all
1372 supported operating systems. In this context, it will only define the
1373 Exxxx constants, as preprocessor macros expanding to integer literals.
1375 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1376 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1377 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1378 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1380 To compile programs that use this feature, the compiler must support
1381 128-bit floating point with the type name _Float128 (as defined by TS
1382 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1383 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1384 must be defined to make the new interfaces visible.
1386 The new functions and macros correspond to those present for other
1387 floating-point types (except for a few obsolescent interfaces not
1388 supported for the new type), with F128 or f128 suffixes; for example,
1389 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1390 printf or scanf formats for the new type; the strfromf128 and strtof128
1391 interfaces should be used instead.
1393 Deprecated and removed features, and other changes affecting compatibility:
1395 * The synchronization that pthread_spin_unlock performs has been changed to
1396 now be equivalent to a C11 atomic store with release memory order to the
1397 spin lock's memory location. Previously, several (but not all)
1398 architectures used stronger synchronization (e.g., containing what is
1399 often called a full barrier). This change can improve performance, but
1400 may affect odd fringe uses of spin locks that depend on the previous
1401 behavior (e.g., using spin locks as atomic variables to try to implement
1402 Dekker's mutual exclusion algorithm).
1404 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1407 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1408 will only be built and installed when the GNU C Library is configured with
1409 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1410 as TIRPC or rpcsvc-proto, to be used.
1412 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1413 libnss_compat, are deprecated, and will not be built or installed by
1416 The NIS(+) support library, libnsl, is also deprecated. By default, a
1417 compatibility shared library will be built and installed, but not headers
1418 or development libraries. Only a few NIS-related programs require this
1419 library. (In particular, the GNU C Library has never required programs
1420 that use 'gethostbyname' to be linked with libnsl.)
1422 Replacement implementations based on TIRPC, which additionally support
1423 IPv6, are available from <https://github.com/thkukuk/>. The configure
1424 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1425 name service modules, to be built and installed.
1427 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1428 support is enabled, the configured recursive resolver must support EDNS.
1429 (Responding to EDNS-enabled queries with responses which are not
1430 EDNS-enabled is fine, but FORMERR responses are not.)
1432 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1433 servers have not supported this opcode for a long time.
1435 * The _res_opcodes variable has been removed from libresolv. It had been
1436 exported by accident.
1438 * <string.h> no longer includes inline versions of any string functions,
1439 as this kind of optimization is better done by the compiler. The macros
1440 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1442 * The nonstandard header <xlocale.h> has been removed. Most programs should
1443 use <locale.h> instead. If you have a specific need for the definition of
1444 locale_t with no other declarations, please contact
1445 libc-alpha@sourceware.org and explain.
1447 * The obsolete header <sys/ultrasound.h> has been removed.
1449 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1451 * The obsolete function cfree has been removed. Applications should use
1454 * The stack_t type no longer has the name struct sigaltstack. This changes
1455 the C++ name mangling for interfaces involving this type.
1457 * The ucontext_t type no longer has the name struct ucontext. This changes
1458 the C++ name mangling for interfaces involving this type.
1460 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1461 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1462 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1463 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1464 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1465 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1466 fpregset_t type no longer has the name struct fpu. This changes the C++
1467 name mangling for interfaces involving those types.
1469 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1470 synced with the kernel:
1472 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1473 are not supported on this architecture and have been removed.
1475 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1476 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1477 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1479 Programs that assume the GET/SETREGS ptrace requests are universally
1480 available will now fail to build, instead of malfunctioning at runtime.
1482 Changes to build and runtime requirements:
1484 * Linux kernel 3.2 or later is required at runtime, on all architectures
1485 supported by that kernel. (This is a change from version 2.25 only for
1488 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1490 * On most architectures, GCC 4.9 or later is required to build the GNU C
1491 Library. On powerpc64le, GCC 6.2 or later is required.
1493 Older GCC versions and non-GNU compilers are still supported when
1494 compiling programs that use the GNU C Library. (We do not know exactly
1495 how old, and some GNU extensions to C may be _de facto_ required. If you
1496 are interested in helping us make this statement less vague, please
1497 contact libc-alpha@sourceware.org.)
1499 Security related changes:
1501 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1502 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1504 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1505 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1507 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1508 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1511 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1512 fixed (CVE-2017-12133).
1514 The following bugs are resolved with this release:
1516 [984] network: Respond to changed resolv.conf in gethostbyname
1517 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1518 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1520 [12189] libc: __stack_chk_fail should not attempt a backtrace
1522 [14096] time: Race condition on timezone/tst-timezone.out
1523 [14172] localedata: az_IR: new locale
1524 [14995] build: glibc fails to build if gold is the default linker, even if
1526 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1527 [16637] network: inet_pton function is accepting IPv6 with bad format
1528 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1529 x86 and other generic code
1530 [16875] localedata: ko_KR: fix lang_name
1531 [17225] localedata: ar_SY: localized month names for May and June are
1533 [17297] localedata: da_DK: wrong date_fmt string
1534 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1535 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1536 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1537 [19066] localedata: ar_SA abbreviated day and month names are in English
1538 [19569] network: resolv: Support an arbitrary number of search domains
1539 [19570] network: Implement random DNS server selection in the stub
1541 [19838] locale: localedef fails on PA-RISC
1542 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1543 order of 0D36 and 0D37
1544 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1546 [20098] libc: FAIL: debug/backtrace-tst on hppa
1547 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1549 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1551 [20313] localedata: Update locale data to Unicode 9.0
1552 [20424] manual: Document how to provide a malloc replacement
1553 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1555 [20686] locale: Add el_GR@euro to SUPPORTED.
1556 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1557 failures consistently
1558 [21015] dynamic-link: Document and fix --enable-bind-now
1559 [21016] nptl: pthread_cond support is broken on hppa
1560 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1561 frame-pointer on i386
1562 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1564 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1565 [21088] libc: Build fails with --enable-static-nss
1566 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1567 generic c code is used
1568 [21109] libc: Tunables broken on big-endian
1569 [21112] math: powf has large ulp errors with base close to 1 and exponent
1571 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1573 [21120] malloc: glibc malloc is incompatible with GCC 7
1574 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1576 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1577 (-0.0) when linking with -lieee
1578 [21171] math: log10, log2 and lgamma return incorrect results
1579 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1580 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1581 [21207] localedata: ce_RU: update weekdays from CLDR
1582 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1583 [21217] localedata: Update months from CLDR-31
1584 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1585 [21243] libc: support_delete_temp_file should issue warning for failed
1587 [21244] libc: support resolv_test_start() socket fd close should be
1589 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1590 new posix_spawn implementation
1591 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1592 leads to lower CPU frequency
1593 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1594 [21261] libc: [sparc64] bits/setjmp.h namespace
1595 [21267] network: [mips] bits/socket.h IOC* namespace
1596 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1597 [21270] libc: mmap64 silently truncates large offset values
1598 [21275] libc: posix_spawn always crashes on ia64 now
1599 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1600 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1601 [21289] libc: Incorrect declaration for 32-bit platforms with
1602 _FILE_OFFSET_BITS=64 causes build error
1603 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1604 not support gethostbyname4_r
1605 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1607 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1609 [21340] libc: Support POSIX_SPAWN_SETSID
1610 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1611 [21359] network: ns_name_pack needs additional byte in destination buffer
1612 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1613 against fragmentation attacks (CVE-2017-12132)
1614 [21369] network: resolv: Remove EDNS fallback
1615 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1617 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1618 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1619 [21393] stdio: Missing dup3 error check in freopen, freopen64
1620 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1621 [21399] localedata: Bad description for U00EC in
1622 localedata/charmaps/CP1254
1623 [21411] malloc: realloc documentation error
1624 [21426] network: sys/socket.h uio.h namespace
1625 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1626 [21445] libc: signal.h bsd_signal namespace
1627 [21455] network: Network headers stdint.h namespace
1628 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1630 [21475] network: resolv: Overlong search path is truncated mid-label
1631 [21511] libc: sigstack namespace
1632 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1633 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1634 bits/syscall.h: No such file or directory
1635 [21517] libc: struct sigaltstack namespace
1636 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1637 [21533] localedata: Update locale data to Unicode 10.0
1639 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1640 junk at end of line, first unrecognized character is `@'
1641 [21538] libc: SIG_HOLD missing for XPG4
1642 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1643 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1644 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1645 [21543] libc: sigevent namespace
1646 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1647 size for general purpose registers in mcontext_t structure
1648 [21550] libc: sigwait namespace
1649 [21552] libc: XPG4 bsd_signal namespace
1650 [21554] libc: sigpause namespace
1651 [21560] libc: sys/wait.h signal.h namespace
1652 [21561] libc: waitid namespace
1653 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1654 '/usr/include/stdlib.h': Permission denied
1655 [21575] libc: sys/wait.h missing struct rusage definition
1656 [21584] libc: sigaltstack etc namespace
1657 [21597] libc: siginterrupt namespace
1658 [21607] math: hppa: FAIL: math/test-tgmath
1659 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1661 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1662 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1663 stack and heap (CVE-2017-1000366)
1664 [21625] libc: wait3 namespace
1665 [21654] nss: Incorrect pointer alignment in NSS group merge result
1667 [21657] network: Parse interface zone id for node-local multicast
1668 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1670 [21666] libc: .symver is used on common symbol
1671 [21668] network: resolv: res_init cross-thread broadcast introduces race
1673 [21687] math: tgmath.h totalorder, totalordermag return type
1674 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1676 [21696] libc: Incorrect assumption of of __cpu_mask in
1677 posix/sched_cpucount.c
1678 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1679 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1681 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1682 leading to relocation crash
1683 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1684 `resolv_conf_matches (resp, conf)' failed.
1685 [21710] localedata: Added Samoan language locale for Samoa
1686 [21711] localedata: Pashto yesstr/nostr locale are missing
1687 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1688 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1689 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1690 [21723] localedata: yesstr/nostr missing for Chinese language locale
1691 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1693 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1695 [21728] localedata: New Locale for Tongan language
1696 [21729] localedata: incorrect LC_NAME fields for hi_IN
1697 [21733] localedata: yesstr and nostr are missing for zh_HK
1698 [21734] localedata: Missing yesstr and nostr are for kw_GB
1699 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1700 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1701 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1702 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1704 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1706 [21749] localedata: Wrong abbreviated day name (“abday”) for
1708 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1709 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1710 [21759] localedata: missing yesstr and nostr for Tigrinya
1711 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1712 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1713 [21767] localedata: Missing Bislama locales
1714 [21768] localedata: Missing yesstr and nostr for aa_ET
1715 [21770] localedata: Missing Field in li_NL
1716 [21778] nptl: Robust mutex may deadlock
1717 [21779] libc: MicroBlaze segfaults when loading libpthread
1718 [21783] localedata: Fix int_select international_call_prefixes
1719 [21784] localedata: Inconsistency in country_isbn
1720 [21788] localedata: Missing Country Postal Abbreviations
1721 [21794] localedata: Added-country_isbn-for-Italy
1722 [21795] localedata: Add/Fix country_isbn for France
1723 [21796] localedata: Added country_isbn for Republic of Korea
1724 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1725 [21799] localedata: Added int_select international_call_prefixes
1726 [21801] localedata: Added int_select international_call_prefixes
1727 [21804] nptl: Double semicolon in thread-shared-types.h
1728 [21807] localedata: LC_ADDRESS fix for pap_CW
1729 [21808] localedata: Fix LC_ADDRESS for pap_AW
1730 [21821] localedata: Added country_name in mai_IN
1731 [21822] localedata: Fix LC_TIME for mai_IN
1732 [21823] localedata: missing yesstr, nostr for sa_IN
1733 [21825] localedata: Fix name_mrs for mag_IN
1734 [21828] localedata: 2.26 changelog should mention user visible changes
1736 [21835] localedata: Added Maithili language locale for Nepal
1737 [21838] localedata: Removed redundant data for the_NP
1738 [21839] localedata: Fix LC_MONETARY for ta_LK
1739 [21844] localedata: Fix Latin characters and Months Sequence.
1740 [21848] localedata: Fix mai_NP Title Name
1745 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1746 24731-2:2010, is supported to enable declarations of functions from that
1747 TR. Note that not all functions from that TR are supported by the GNU C
1750 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1751 18661-1:2014, is supported to enable declarations of functions and macros
1752 from that TS. Note that not all features from that TS are supported by
1755 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1756 18661-4:2015, is supported to enable declarations of functions and macros
1757 from that TS. Note that most features from that TS are not supported by
1760 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1761 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1762 Since the GNU C Library defaults to a much newer revision of POSIX, this
1763 will only affect programs that specifically request an old conformance
1764 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1765 see a change in the visible declarations, but a program compiled with
1766 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1769 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1770 defined by all multithreaded code, but glibc has not required this for
1773 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1774 means that in a future release, the macros “major”, “minor”, and “makedev”
1775 will only be available from <sys/sysmacros.h>.
1777 These macros are not part of POSIX nor XSI, and their names frequently
1778 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1779 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1780 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1783 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1784 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1785 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1787 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1788 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1789 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1790 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1791 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1792 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1793 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1794 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1795 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1796 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1797 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1800 * New <math.h> features are added from TS 18661-1:2014:
1802 - Signaling NaN macros: SNANF, SNAN, SNANL.
1804 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1805 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1806 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1808 - llogb functions: the llogb, llogbf and llogbl functions, and the
1809 FP_LLOGB0 and FP_LLOGBNAN macros.
1811 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1814 - Comparison macros: iseqsig.
1816 - Classification macros: iscanonical, issubnormal, iszero.
1818 - Total order functions: totalorder, totalorderf, totalorderl,
1819 totalordermag, totalordermagf, totalordermagl.
1821 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1823 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1824 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1826 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1827 are added to libc. They convert a floating-point number into string.
1829 * Most of glibc can now be built with the stack smashing protector enabled.
1830 It is recommended to build glibc with --enable-stack-protector=strong.
1831 Implemented by Nick Alcock (Oracle).
1833 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1834 intended to be used instead of memset() to erase sensitive data after use;
1835 the compiler will not optimize out calls to explicit_bzero even if they
1836 are "unnecessary" (in the sense that no _correct_ program can observe the
1837 effects of the memory clear).
1839 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1840 to float instead of double. This does not affect the ABI of any libraries
1841 that are part of the GNU C Library, but may affect the ABI of other
1842 libraries that use this type in their interfaces.
1844 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1845 float_t and double_t types are now defined to long double instead of float
1846 and double. These options are not the default, and this does not affect
1847 the ABI of any libraries that are part of the GNU C Library, but it may
1848 affect the ABI of other libraries that use this type in their interfaces,
1849 if they are compiled or used with those options.
1851 * The getentropy and getrandom functions, and the <sys/random.h> header file
1854 * The buffer size for byte-oriented stdio streams is now limited to 8192
1855 bytes by default. Previously, on Linux, the default buffer size on most
1856 file systems was 4096 bytes (and thus remains unchanged), except on
1857 network file systems, where the buffer size was unpredictable and could be
1858 as large as several megabytes.
1860 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1861 for the Linux quota interface which predates kernel version 2.4.22 has
1864 * The malloc_get_state and malloc_set_state functions have been removed.
1865 Already-existing binaries that dynamically link to these functions will
1866 get a hidden implementation in which malloc_get_state is a stub. As far
1867 as we know, these functions are used only by GNU Emacs and this change
1868 will not adversely affect already-built Emacs executables. Any undumped
1869 Emacs executables, which normally exist only during an Emacs build, should
1870 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1872 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1873 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1874 “no-ip6-dotint” had already been the default, and support for the
1875 “ip6-dotint” option was removed from the Internet in 2006.
1877 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1878 flag from <resolv.h> have been removed. The option relied on a
1879 backwards-incompatible DNS extension which was never deployed on the
1882 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1883 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1884 They were already unimplemented.
1886 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1887 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1888 removed again from the IETF name lookup interface specification in RFC
1889 2553. Applications should use getaddrinfo instead.
1891 * DNSSEC-related declarations and definitions have been removed from the
1892 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1893 decode the data part of DNSSEC record types. Previous versions of glibc
1894 only implemented minimal support for the previous version of DNSSEC, which
1895 is incompatible with the currently deployed version.
1897 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1898 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1899 <arpa/nameser.h> header file because the distinction between RR types and
1900 meta-RR types is not officially standardized, subject to revision, and
1901 thus not suitable for encoding in a macro.
1903 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1904 and rhook members of the res_state type in <resolv.h> have been removed.
1905 The glibc stub resolver did not support these hooks, but the header file
1906 did not reflect that.
1908 * For multi-arch support it is recommended to use a GCC which has
1909 been built with support for GNU indirect functions. This ensures
1910 that correct debugging information is generated for functions
1911 selected by IFUNC resolvers. This support can either be enabled by
1912 configuring GCC with '--enable-gnu-indirect-function', or by
1913 enabling it by default by setting 'default_gnu_indirect_function'
1914 variable for a particular architecture in the GCC source file
1917 * GDB pretty printers have been added for mutex and condition variable
1918 structures in POSIX Threads. When installed and loaded in gdb these pretty
1919 printers show various pthread variables in human-readable form when read
1920 using the 'print' or 'display' commands in gdb.
1922 * Tunables feature added to allow tweaking of the runtime for an application
1923 program. This feature can be enabled with the '--enable-tunables' configure
1924 flag. The GNU C Library manual has details on usage and README.tunables has
1925 instructions on adding new tunables to the library.
1927 * A new version of condition variables functions have been implemented in
1928 the NPTL implementation of POSIX Threads to provide stronger ordering
1931 * A new version of pthread_rwlock functions have been implemented to use a more
1932 scalable algorithm primarily through not using a critical section anymore to
1935 Security related changes:
1937 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1938 have been created with makecontext could fail to terminate due to a
1939 missing .cantunwind annotation. This has been observed to lead to a hang
1940 (denial of service) in some Go applications compiled with gccgo. Reported
1941 by Andreas Schwab. (CVE-2016-6323)
1943 * The DNS stub resolver functions would crash due to a NULL pointer
1944 dereference when processing a query with a valid DNS question type which
1945 was used internally in the implementation. The stub resolver now uses a
1946 question type which is outside the range of valid question type values.
1949 The following bugs are resolved with this release:
1951 [4099] stdio: Overly agressive caching by stream i/o functions.
1952 [7065] build: Support building glibc with -fstack-protector or -fstack-
1954 [9842] localedata: en_CA: incorrect date format
1955 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1956 before it started waiting
1957 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1958 [15765] nptl: sem_open is wrongly a cancellation point
1959 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1960 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1962 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1963 library linked with pthread
1964 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1965 "FIXME: Ingo" issue)
1966 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1967 [17252] libc: getrandom and getentropy syscall
1968 [17730] malloc: thread-local storage is sometimes improperly free()'d
1969 after being __libc_memalign()'d
1970 [18241] stdio: failed fseek on memstream does not set errno and can fail
1972 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
1974 [18463] nptl: pthread_cond_broadcast issue when surrounded by
1975 PTHREAD_PRIO_INHERIT mutex on ARM
1976 [18784] network: res_query and related function crash for special record
1977 type queries (CVE-2015-5180)
1978 [19380] math: strtod does not raise "inexact"
1979 [19387] string: Integer overflow in memchr
1980 [19390] string: Integer overflow in strncat
1981 [19398] build: linknamespace tests fail with massively parallel build
1982 [19402] nptl: Deadlock with robust shared mutex and asynchronous
1984 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
1985 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
1986 [19514] libc: [PATCH] Fix spelling errors in spelling
1987 "implement"/"implementation" in several places
1988 [19582] network: Deprecate RES_USE_INET6
1989 [19673] manual: clog10 docs appear to be erroneous
1990 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
1991 causes a segmentation fault
1992 [19826] libc: invalid pointer returned from __tls_get_addr with static
1994 [20016] network: resolv: Remove hooks support from the API
1995 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
1997 [20033] math: [x86_64] vectorized math function don't call the __finite
1999 [20116] nptl: use after free in pthread_create
2000 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2001 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2003 [20311] nptl: please install proc_service.h
2004 [20366] libc: Compilation errors in installed headers in strict-compliance
2006 [20370] malloc: malloc: Arena free list management is still racy
2007 (incorrect fix in bug 19243)
2008 [20386] libc: assert (X = 0) does not result in GCC warning
2009 [20432] malloc: malloc: Minimize interface required for interposition
2010 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2011 in _Unwind_Backtrace (CVE-2016-6323)
2012 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2013 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2015 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2016 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2017 [20477] network: resolv: incorrect double-checked locking related to
2019 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2021 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2023 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2024 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2025 cause transition penalty
2026 [20517] math: sparcv9 missing fdiml compat symbol
2027 [20524] manual: strverscmp is inconsistent
2028 [20525] libc: <sys/quota.h> should be based on kernel headers
2029 [20539] math: GCC 7 -static -lm fails to link at -O3
2030 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2032 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2034 [20591] network: Remove obsolete DNSSEC support
2035 [20592] network: DNS resource record type classification macros in
2036 <arpa/nameser.h> are incorrect
2037 [20593] network: Update DNS RR type definitions
2038 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2039 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2041 [20629] network: libresolv: Remove support for bitstring labels
2043 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2044 assertion: "maxidx >= 2"
2045 [20660] math: [arm] Use VSQRT
2046 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2047 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2048 [20689] libc: Test for FMA should also check for AVX.
2049 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2050 [20715] math: iszero macro breaks existing code
2051 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2052 [20728] libc: powerpc: Missing TOC stub in clone
2053 [20729] build: glibc-2.24 fails to build for i486 with -Os
2054 [20750] build: Build fails with default PIE enabled gcc-6.x
2055 [20768] math: [alpha] sqrt fegetenv namespace
2056 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2058 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2059 __FLT_EVAL_METHOD__ is 2
2060 [20790] network: rpcgen buffer overrun in get_prog_declaration
2061 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2062 [20829] libc: crypt snprintf namespace
2063 [20847] libc: tst-vfork3 failure
2064 [20855] math: Default bits/mathdef.h has inappropriate float_t
2065 [20859] math: [sh4] FP_ILOGB0 invalid
2066 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2067 U+20AC), not same as GBK
2068 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2069 [20916] math: pow handling of sNaN arguments
2070 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2071 [20919] math: Bad pow (qNaN, 0) result with -lieee
2072 [20940] math: hypot sNaN handling
2073 [20947] math: fmax, fmin sNaN handling
2074 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2075 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2077 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2078 [20973] nptl: robust mutexes: Lost wake-ups
2079 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2080 [20978] nis: strlen on null pointer in nss_nisplus
2081 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2083 [21014] string: i686 memchr overflows internal pointer check
2084 [21019] libc: [mips] n32 lseek incorrect on overflow
2085 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2086 [21026] libc: [MIPS] readahead syscall is broken on n64
2087 [21028] math: Fallback fesetexceptflag should always succeed
2088 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2089 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2091 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2092 [21061] librt: [microblaze] librt lost clock_* exports
2093 [21073] libc: tunables: insecure environment variables passed to
2094 subprocesses with AT_SECURE
2095 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2099 * The minimum Linux kernel version that this version of the GNU C Library
2100 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2101 kernel version 2.6.32 or later suffices (on architectures that already
2102 required kernel versions more recent than 3.2, those requirements remain
2103 unchanged). Linux 3.2 or later kernel headers are required on all
2106 * The pap_AN locale has been deleted. This has been deprecated for a long
2107 time. It has been replaced by pap_AW & pap_CW, both of which have long
2108 been included in previous releases.
2110 * The readdir_r and readdir64_r functions have been deprecated. It is
2111 recommended to use readdir and readdir64 instead.
2113 * The type “union wait” has been removed. It was deprecated in the early
2114 1990s and never part of POSIX. Application code should use the int type
2115 instead of “union wait”.
2117 * A new NSS action is added to facilitate large distributed system
2118 administration. The action, MERGE, allows remote user stores like LDAP
2119 to be merged into local user stores like /etc/groups in order to provide
2120 easy to use, updated, and managed sets of merged credentials. The new
2121 action can be used by configuring it in /etc/nsswitch.conf:
2122 group: files [SUCCESS=merge] nis
2123 Implemented by Stephen Gallagher (Red Hat).
2125 * The deprecated __malloc_initialize_hook variable has been removed from the
2128 * The long unused localedef --old-style option has been removed. It hasn't
2129 done anything in over 16 years. Scripts using this option can safely
2132 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2133 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2134 return the next representable value in the direction of positive infinity
2135 and the nextdown functions return the next representable value in the
2136 direction of negative infinity. These are currently enabled as GNU
2139 Security related changes:
2141 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2142 could result in a stack overflow when getnetbyname was called with an
2143 overly long name. (CVE-2016-3075)
2145 * Previously, getaddrinfo copied large amounts of address data to the stack,
2146 even after the fix for CVE-2013-4458 has been applied, potentially
2147 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2148 instead. Reported by Michael Petlan. (CVE-2016-3706)
2150 * The glob function suffered from a stack-based buffer overflow when it was
2151 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2152 Reported by Alexander Cherepanov. (CVE-2016-1234)
2154 * The Sun RPC UDP client could exhaust all available stack space when
2155 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2156 alloca plugin for GCC. (CVE-2016-4429)
2158 * The IPv6 name server management code in libresolv could result in a memory
2159 leak for each thread which is created, performs a failing naming lookup,
2160 and exits. Over time, this could result in a denial of service due to
2161 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2163 The following bugs are resolved with this release:
2165 [1170] localedata: ne_NP: update Nepali locale definition file
2166 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2168 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2169 [6796] math: fdim() does not set errno on overflow
2170 [10354] libc: posix_spawn should use vfork() in more cases than presently
2171 [11213] localedata: localedata: add copyright disclaimer to locale files
2172 [12143] localedata: chr_US: new Cherokee locale
2173 [12450] localedata: sgs_LT: new locale
2174 [12676] localedata: ln_CD: new locale
2175 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2177 [13304] math: fma, fmaf, fmal produce wrong results
2178 [14259] build: --localedir arg to configure is ignored
2179 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2180 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2181 [14934] localedata: es_CL: wrong first weekday chilean locale
2182 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2184 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2186 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2187 [15368] nptl: raise() is not async-signal-safe
2188 [15479] math: ceil, floor, round and trunc raise inexact exception
2189 [15578] localedata: kk_KZ: various updates
2190 [16003] localedata: pap_AN: punt old locale
2191 [16137] localedata: iw_IL: punt old locale
2192 [16190] localedata: eo: new esperanto locale
2193 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2194 [16742] malloc: race condition: pthread_atfork() called before first
2195 malloc() results in unexpected locking behaviour/deadlocks
2196 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2198 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2199 [17565] localedata: pt_PT: wrong (work-)week start
2200 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2201 [17950] build: Build fails with -msse
2202 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2203 [18433] libc: posix_spawn does not return correctly upon failure to
2205 [18453] localedata: charmaps/IBM875: incorrect codes
2206 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2208 [18896] localedata: he_IL: improvements for currency
2209 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2210 Romanian locale data
2211 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2213 [19056] libc: Deprecate readdir_r
2214 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2216 [19198] localedata: nl_NL: small improvements for Dutch locales
2217 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2218 nameservers (CVE-2016-5417)
2219 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2221 [19400] locale: Language missing in "iso-639.def", trivial fix in
2223 [19431] malloc: Deadlock between fflush, getdelim, and fork
2224 [19505] libc: Incorrect file descriptor validity checks in
2225 posix_spawn_file_actions_add{open,close,dup2}
2226 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2227 when using RTLD_NEXT
2228 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2229 `intl/{gettextP,loadinfo}.h'
2230 [19534] libc: execle, execlp may use malloc
2231 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2232 [19573] network: res_nclose and __res_maybe_init disagree about name
2233 server initialization, breaking Hesiod
2234 [19575] localedata: Status of GB18030 tables
2235 [19581] localedata: sr_* date_fmt string contains additional newline
2236 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2238 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2239 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2240 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2241 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2243 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2245 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2247 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2248 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2249 [19633] locale: strfmon_l applies global locale to number formatting
2250 [19642] network: Memory leak in getnameinfo
2251 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2252 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2254 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2255 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2257 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2258 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2260 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2262 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2264 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2265 pointers and lengths in error-case.
2266 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2267 report errors on UTF-16 surrogates values.
2268 [19755] nscd: nscd assertion failure in gc
2269 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2270 [19759] libc: mempcpy shouldn't be inlined
2271 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2272 [19765] libc: s390 needs an optimized mempcpy
2273 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2274 NAME_MAX limit assumption (CVE-2016-1234)
2275 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2276 [19787] network: Missing and incorrect truncation checks in getnameinfo
2277 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2279 [19791] network: Assertion failure in res_query.c with un-connectable name
2281 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2282 [19822] math: libm.so install clobbers old version
2283 [19825] network: resolv: send_vc can return uninitialized data in second
2284 response to getaddrinfo
2285 [19830] network: nss_dns: should check RDATA length against buffer length
2286 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2287 confronted with A/AAAA records of invalid size
2288 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2289 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2290 [19853] stdio: Printing IBM long double in decimal with high precision is
2292 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2293 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2294 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2296 [19865] network: Assertion failure or memory leak in
2297 _nss_dns_getcanonname_r
2298 [19868] network: nss_dns: netent code does not skip over non-PTR records
2299 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2301 [19881] string: Improve x86-64 memset
2302 [19907] string: Incorrect memcpy tests
2303 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2305 [19925] libc: termios.h XCASE namespace
2306 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2307 [19929] libc: limits.h NL_NMAX namespace
2308 [19931] stdio: Memory leak in vfprintf
2309 [19957] libc: clone(CLONE_VM) access invalid parent memory
2310 [19963] localedata: en_IL: New locale
2311 [19989] stdio: stdio.h cuserid namespace
2312 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2314 [19996] locale: langinfo.h nl_langinfo_l namespace
2315 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2316 [20010] network: getaddrinfo: Stack overflow in hostent translation
2318 [20012] stdio: libio: fmemopen append mode failure
2319 [20014] stdio: stdio.h namespace for pre-threads POSIX
2320 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2321 [20023] libc: fcntl.h timespec namespace
2322 [20024] math: [x86_64] vectorized sincos trashes the stack
2323 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2324 [20041] time: sys/time.h timespec namespace
2325 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2326 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2327 [20051] libc: ttyslot in wrong header under wrong conditions
2328 [20054] libc: gethostname not declared for XPG4
2329 [20055] libc: termios.h missing tcgetsid for XPG4
2330 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2332 [20073] libc: sys/stat.h fchmod namespace
2333 [20074] libc: stdlib.h rand_r namespace
2334 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2335 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2337 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2338 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2340 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2341 [20119] libc: Wrong mask for processors level type from CPUID
2342 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2343 AS not supporting AVX512
2344 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2346 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2347 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2349 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2350 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2351 [20178] libc: posix_spawn{p} should not call exit
2352 [20191] stdio: libio: vtables hardening
2353 [20195] string: FMA4 detection requires CPUID execution with register
2355 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2356 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2358 [20212] math: acos (sNaN) returns sNaN
2359 [20213] math: asin (sNaN) returns sNaN
2360 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2361 [20218] math: [i386] asinhl (sNaN) returns sNaN
2362 [20219] math: [i386] atanhl (sNaN) returns sNaN
2363 [20222] stdio: fopencookie: Mangle function pointers
2364 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2365 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2366 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2368 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2369 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2370 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2371 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2372 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2373 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2374 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2375 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2376 [20240] math: modf (sNaN) returns sNaN
2377 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2378 [20250] math: frexp (sNaN) returns sNaN
2379 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2380 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2382 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2383 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2384 subscript is below array bounds [-Werror=array-bounds]
2385 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2386 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2388 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2389 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2391 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2392 "invalid" exceptions
2393 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2394 [20316] localedata: id_ID: Februari instead of Pebruari
2395 [20327] string: POWER8 strcasecmp returns incorrect result
2396 [20347] math: Failure: Test: j0_downward (0xap+0)
2397 [20348] libc: FAIL: misc/tst-preadvwritev64
2398 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2399 [20350] libc: There is no test for p{read,write}64
2400 [20357] math: Incorrect cos result for 1.5174239687223976
2401 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2405 * Unicode 8.0.0 Support: Character encoding, character type info, and
2406 transliteration tables are all updated to Unicode 8.0.0, using new
2407 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2408 These updates cause user visible changes, such as the fixes for bugs
2409 89, 16061, and 18568.
2411 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2412 kernel-internal CPU set size. This means that requests that change the
2413 CPU affinity which failed before (for example, an all-ones CPU mask) will
2414 now succeed. Applications that need to determine the effective CPU
2415 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2416 setting it because the kernel can adjust it (and the previous size check
2417 would not detect this in the majority of cases).
2419 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2420 the following new symbols are used: fts64_children, fts64_close,
2421 fts64_open, fts64_read and fts64_set.
2423 * getaddrinfo now detects certain invalid responses on an internal netlink
2424 socket. If such responses are received, an affected process will
2425 terminate with an error message of "Unexpected error <number> on netlink
2426 descriptor <number>" or "Unexpected netlink response of size <number> on
2427 descriptor <number>". The most likely cause for these errors is a
2428 multi-threaded application which erroneously closes and reuses the netlink
2429 file descriptor while it is used by getaddrinfo.
2431 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2432 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2433 unnecessary serialization of memory allocation requests across threads.
2434 The defect is now corrected. Users should see a substantial increase in
2435 the concurent throughput of allocation requests for applications which
2436 trigger this bug. Affected applications typically create and
2437 destroy threads frequently. (Bug 19048 was reported and analyzed by
2440 * There is now a --disable-timezone-tools configure option for disabling the
2441 building and installing of the timezone related utilities (zic, zdump, and
2442 tzselect). This is useful for people who build the timezone data and code
2443 independent of the GNU C Library.
2445 * The obsolete header <regexp.h> has been removed. Programs that require
2446 this header must be updated to use <regex.h> instead.
2448 * The obsolete functions bdflush, create_module, get_kernel_syms,
2449 query_module and uselib are no longer available to newly linked binaries;
2450 the header <sys/kdaemon.h> has been removed. These functions and header
2451 were specific to systems using the Linux kernel and could not usefully be
2452 used with the GNU C Library on systems with version 2.6 or later of the
2455 * Optimized string, wcsmbs and memory functions for IBM z13.
2456 Implemented by Stefan Liebler.
2458 * Newly linked programs that define a variable called signgam will no longer
2459 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2460 require signgam to be set by those functions must ensure that they use the
2461 variable provided by the GNU C Library and declared in <math.h>, without
2462 defining their own copy.
2464 * The minimum GCC version that can be used to build this version of the GNU
2465 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2466 still be used to compile programs using the GNU C Library.
2468 Security related changes:
2470 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2471 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2473 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2474 the pointer guard feature. It is always enabled. Previously,
2475 LD_POINTER_GUARD could be used to disable security hardening in binaries
2476 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2479 * An integer overflow in hcreate and hcreate_r could lead to an
2480 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2482 * The catopen function no longer has unbounded stack usage. Reported by
2483 Max. (CVE-2015-8779)
2485 * The nan, nanf and nanl functions no longer have unbounded stack usage
2486 depending on the length of the string passed as an argument to the
2487 functions. Reported by Joseph Myers. (CVE-2014-9761)
2489 * A stack-based buffer overflow was found in libresolv when invoked from
2490 libnss_dns, allowing specially crafted DNS responses to seize control
2491 of execution flow in the DNS client. The buffer overflow occurs in
2492 the functions send_dg (send datagram) and send_vc (send TCP) for the
2493 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2494 family. The use of AF_UNSPEC triggers the low-level resolver code to
2495 send out two parallel queries for A and AAAA. A mismanagement of the
2496 buffers used for those queries could result in the response of a query
2497 writing beyond the alloca allocated buffer created by
2498 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2499 the overflow. Thanks to the Google Security Team and Red Hat for
2500 reporting the security impact of this issue, and Robert Holiday of
2501 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2503 The following bugs are resolved with this release:
2505 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2506 [887] math: Math library function "logb" and "nextafter" inconsistent
2507 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2508 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2509 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2510 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2512 [4404] localedata: German translation of "Alarm clock" is misleading
2513 [6799] math: nextafter() and nexttoward() doen't set errno on
2514 overflow/underflow errors
2515 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2517 [10432] nis: _nss_nis_setnetgrent assertion failure
2518 [11460] libc: fts has no LFS support
2519 [12926] network: getaddrinfo()/make_request() may spin forever
2520 [13065] nptl: Race condition in pthread barriers
2521 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2522 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2524 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2525 [14912] libc: Rename non-installed bits/*.h headers
2526 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2527 [15367] math: Let gcc use __builtin_isinf
2528 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2529 [15421] math: lgamma wrongly sets signgam for ISO C
2530 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2531 FE_INVALID with argument out of range
2532 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2534 [15786] dynamic-link: ifunc resolver functions can smash function
2536 [15918] math: Unnecessary check for equality in hypotf()
2537 [16061] localedata: Review / update transliteration data
2538 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2540 [16141] time: strptime %z offset restriction
2541 [16171] math: drem should be alias of remainder
2542 [16296] math: fegetround is pure?
2543 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2544 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2546 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2547 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2549 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2550 "Exception "Inexact" set" on ppc32
2551 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2552 [16517] math: Missing underflow exception from tanf/tan/tanl
2553 [16519] math: Missing underflow exception from sinhf
2554 [16520] math: Missing underflow exception from tanhf
2555 [16521] math: Missing underflow exception from exp2
2556 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2558 [16734] stdio: fopen calls mmap to allocate its buffer
2559 [16961] math: nan function incorrect handling of bad sequences
2560 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2561 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2562 [16985] locale: localedef: confusing error message when opening output
2564 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2565 [17197] locale: Redundant shift character in iconv conversion output at
2567 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2568 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2569 [17250] dynamic-link: static linking breaks nss loading
2570 (getaddrinfo/getpwnam/etc...)
2571 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2573 [17441] math: isnan() should use __builtin_isnan() in GCC
2574 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2575 (related to lock elision)
2576 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2577 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2578 [17887] time: strptime should be able to parse "+01:00" style timezones
2579 [17905] libc: catopen() Multiple unbounded stack allocations
2581 [18084] libc: backtrace (..., 0) dumps core on x86
2582 [18086] libc: nice() sets errno to 0 on success
2583 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2584 is too large (CVE-2015-8778)
2585 [18251] dynamic-link: SONAME missing when audit modules provides path
2586 [18265] libc: add attributes for wchar string and memory functions
2587 [18370] math: csqrt missing underflows
2588 [18421] libc: [hppa] read-only segment has dynamic relocations
2589 [18472] libc: Obsolete syscall wrappers should be compat symbols
2590 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2591 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2592 [18525] localedata: Remove locale timezone information
2593 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2594 [18568] localedata: Update locale data to Unicode 8.0
2595 [18589] locale: sort-test.sh fails at random
2596 [18595] math: ctan, ctanh missing underflows
2597 [18604] libc: assert macro-expands its argument
2598 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2599 contains a vector instruction exception.
2600 [18611] math: j1, jn missing errno setting on underflow
2601 [18618] localedata: sync Chechen locale definitions with other *_RU
2603 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2604 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2605 [18665] network: In send_dg, the recvfrom function is NOT always using the
2606 buffer size of a newly created buffer (CVE-2015-7547)
2607 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2609 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2611 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2612 [18699] math: tilegx cproj() for various complex infinities does not yield
2614 [18724] libc: Harden put*ent functions against data injection
2615 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2616 [18755] build: build errors with -DNDEBUG
2617 [18757] stdio: fmemopen fails to set errno on failure
2618 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2620 [18781] libc: openat64 lacks O_LARGEFILE
2621 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2622 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2623 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2624 [18790] math: [ldbl-128ibm] tanhl inaccurate
2625 [18795] libc: stpncpy fortification misses buffer lengths that are
2626 statically too large
2627 [18796] build: build fails for --disable-mathvec
2628 [18803] math: hypot missing underflows
2629 [18820] stdio: fmemopen may leak memory on failure
2630 [18823] math: csqrt spurious underflows
2631 [18824] math: fma spurious underflows
2632 [18825] math: pow missing underflows
2633 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2634 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2635 [18870] build: sem_open.c fails to compile with missing symbol
2637 [18872] stdio: Fix memory leak in printf_positional
2638 [18873] libc: posix_fallocate overflow check ineffective
2639 [18875] math: Excess precision leads incorrect libm
2640 [18877] libc: arm: mmap offset regression
2641 [18887] libc: memory corruption when using getmntent on blank lines
2642 [18918] localedata: hu_HU: change time to HH:MM:SS format
2643 [18921] libc: Regression: extraneous stat() and fstat() performed by
2645 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2646 binaries (CVE-2015-8777)
2647 [18951] math: tgamma missing underflows
2648 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2650 [18953] localedata: lt_LT: change currency symbol to the euro
2651 [18956] math: powf inaccuracy
2652 [18961] math: [i386] exp missing underflows
2653 [18966] math: [i386] exp10 missing underflows
2654 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2655 [18969] build: multiple string test failures due to missing locale
2657 [18970] libc: Reference of pthread_setcancelstate in libc.a
2658 [18977] math: float / long double Bessel functions not in XSI POSIX
2659 [18980] math: i386 libm functions return with excess range and precision
2660 [18981] math: i386 scalb*, ldexp return with excess range and precision
2661 [18982] stdio: va_list and vprintf
2662 [18985] time: Passing out of range data to strftime() causes a segfault
2664 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2665 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2666 [19012] locale: iconv_open leaks memory on error path
2667 [19016] math: clog, clog10 inaccuracy
2668 [19018] nptl: Mangle function pointers in tls_dtor_list
2669 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2670 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2671 [19048] malloc: malloc: arena free list can become cyclic, increasing
2673 [19049] math: [powerpc] erfc incorrect zero sign
2674 [19050] math: [powerpc] log* incorrect zero sign
2675 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2676 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2677 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2678 [19074] network: Data race in _res_hconf_reorder_addrs
2679 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2680 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2681 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2683 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2685 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2686 [19086] manual: posix_fallocate64 documented argument order is wrong.
2687 [19088] math: lround, llround missing exceptions close to overflow
2689 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2690 [19095] math: dbl-64 lrint incorrect for 64-bit long
2691 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2692 [19124] dynamic-link: ld.so failed to build with older assmebler
2693 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2694 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2695 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2696 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2697 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2698 pthread_setaffinity_np
2699 [19156] math: [ldbl-128] j0l spurious underflows
2700 [19164] nptl: tst-getcpu fails with many possible CPUs
2701 [19168] math: math/test-ildoubl and math/test-ldouble failure
2702 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2703 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2705 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2706 (FE_NOMASK_ENV) do not clear SSE exceptions
2707 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2708 _int_new_arena/reused_arena
2709 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2710 [19201] math: dbl-64 remainder incorrect sign of zero result
2711 [19205] math: bits/math-finite.h conditions do not match math.h and
2713 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2714 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2715 for C99-based standards
2716 [19212] libc: features.h not -Wundef clean
2717 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2719 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2720 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2721 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2723 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2724 "inexact" exceptions
2725 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2727 [19242] libc: strtol incorrect in Turkish locales
2728 [19243] malloc: reused_arena can pick an arena on the free list, leading
2729 to an assertion failure and reference count corruption
2730 [19253] time: tzset() ineffective when temporary TZ did not include DST
2732 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2733 [19270] math: [hppa] Shared libm missing __isnanl
2734 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2735 MAP_HUGETLB and MAP_STACK defines
2736 [19313] nptl: Wrong __cpu_mask for x32
2737 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2738 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2739 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2740 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2741 [19363] time: x32: times() return value wrongly truncates/sign extends
2743 [19367] dynamic-link: Improve branch prediction on Silvermont
2744 [19369] network: Default domain name not reset by res_ninit when "search"
2745 / "domain" entry is removed from resolv.conf
2746 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2748 [19385] localedata: bg_BG: time separator should be colon, not comma
2749 [19408] libc: linux personality syscall wrapper may erroneously return an
2750 error on 32-bit architectures
2751 [19415] libc: dladdr returns wrong names on hppa
2752 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2753 IBM905, IBM907, and IBM909
2754 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2755 [19443] build: build failures with -DDEBUG
2756 [19451] build: Make check fails on test-double-vlen2
2757 [19462] libc: Glibc failed to build with -Os
2758 [19465] math: Wrong code with -Os
2759 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2761 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2763 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2764 [19486] math: S390: Math tests fail with "Exception Inexact set".
2765 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2766 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2768 [19590] math: Fail to build shared objects that use libmvec.so functions.
2772 * The following bugs are resolved with this release:
2774 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2775 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2776 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2777 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2778 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2779 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2780 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2781 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2782 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2783 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2784 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2785 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2786 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2787 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2788 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2789 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2790 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2791 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2792 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2793 18657, 18676, 18694, 18696, 18887.
2795 * Cache information can be queried via sysconf() function on s390 e.g. with
2796 _SC_LEVEL1_ICACHE_SIZE as argument.
2798 * A buffer overflow in gethostbyname_r and related functions performing DNS
2799 requests has been fixed. If the NSS functions were called with a
2800 misaligned buffer, the buffer length change due to pointer alignment was
2801 not taken into account. This could result in application crashes or,
2802 potentially arbitrary code execution, using crafted, but syntactically
2803 valid DNS responses. (CVE-2015-1781)
2805 * The time zone file parser has been made more robust against crafted time
2806 zone files, avoiding heap buffer overflows related to the processing of
2807 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2808 large time zone data files. Overly long time zone specifiers in the TZ
2809 variable no longer result in stack overflows and crashes.
2811 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2812 for LD and GD on x86 and x86-64, has been implemented. You will need
2813 binutils-2.24 or later to enable this optimization.
2815 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2816 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2817 Hat). These updates cause user visible changes, such as the fix for bug
2820 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2821 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2822 condition in some applications.
2824 * Added vector math library named libmvec with the following vectorized x86_64
2825 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2827 The library can be disabled with --disable-mathvec. Use of the functions is
2828 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2829 Shared library libmvec.so is linked in as needed when using -lm (no need to
2830 specify -lmvec explicitly for not static builds).
2831 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2833 * A new fmemopen implementation has been added with the goal of POSIX
2834 compliance. The new implementation fixes the following long-standing
2835 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2836 old implementation is still present for use be by existing binaries.
2838 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2839 releases. It has been fixed to match 2.19 and older, but binaries built
2840 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2842 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2843 Contributed by Roland McGrath (Google).
2845 * The header <regexp.h> is deprecated, and will be removed in a future
2846 release. Use of this header will trigger a deprecation warning.
2847 Application developers should update their code to use <regex.h> instead.
2849 This header was formerly part of SUS, but was deprecated in 1994 and
2850 removed from the standard in 2001. Also, the glibc implementation
2851 leaks memory. See BZ#18681 for more details.
2855 * The following bugs are resolved with this release:
2857 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2858 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2859 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2860 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2861 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2862 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2863 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2864 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2865 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2866 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2869 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2870 too little memory for the to-be-scanned arguments and overflow the
2871 allocated buffer. The implementation now correctly computes the required
2872 buffer size when using malloc, and switches to malloc from alloca as
2875 * A new semaphore algorithm has been implemented in generic C code for all
2876 machines. Previous custom assembly implementations of semaphore were
2877 difficult to reason about or ensure that they were safe. The new version
2878 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2879 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2880 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2882 * Port to Altera Nios II has been contributed by Mentor Graphics.
2884 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2885 implementations for powerpc64/powerpc64le.
2886 Implemented by Adhemerval Zanella (IBM).
2888 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2889 and powerpc64le. This may improve lock scaling of existing programs on
2890 HTM capable systems. The lock elision code is only enabled with
2891 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2892 powerpc will issue a transaction abort on every syscall to avoid side
2893 effects being visible outside transactions.
2895 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2896 AArch64. Contributed by ARM Ltd.
2898 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2900 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2901 under certain input conditions resulting in the execution of a shell for
2902 command substitution when the application did not request it. The
2903 implementation now checks WRDE_NOCMD immediately before executing the
2904 shell and returns the error WRDE_CMDSUB as expected.
2906 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2907 processing format strings with a large number of format specifiers.
2909 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2910 infinite loop if the DNS response contained a PTR record of an unexpected
2913 * The minimum GCC version that can be used to build this version of the GNU
2914 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2915 still be used to compile programs using the GNU C Library.
2917 * The GNU C Library is now built with -Werror by default. This can be
2918 disabled by configuring with --disable-werror.
2920 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2922 * The obsolete sigvec function has been removed. This was the original
2923 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2924 programs have been using instead for about 25 years. Of course, ABI
2925 compatibility for old binaries using sigvec remains intact.
2927 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2928 with newer versions of bison.
2930 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2931 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2932 registers overlay two consecutive single-precision registers. MIPS32R2
2933 introduced a new FPU mode (FR=1) where double-precision registers extend the
2934 corresponding single-precision registers which is incompatible with the
2935 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2936 require the use of FR=1 making a transition necessary. New o32 ABI
2937 extensions enable users to migrate over time from the original o32 ABI
2938 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2939 tracks the ABI of any loaded object and verifies that new objects are
2940 compatible. Mode transitions will also be requested as required and
2941 unsupportable objects will be rejected. The ABI checks include both soft and
2942 hard float ABIs for o32, n32 and n64.
2944 GCC 5 with GNU binutils 2.25 onwards:
2945 It is strongly recommended that all o32 system libraries are built using the
2946 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2947 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2948 compiler using --with-fp-32=xx to set this by default.
2952 * The following bugs are resolved with this release:
2954 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2955 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2956 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2957 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2958 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2959 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2960 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2961 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2962 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2963 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2964 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2965 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2966 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2967 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2968 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2970 * Reverted change of ABI data structures for s390 and s390x:
2971 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2972 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2973 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
2974 are preserved pointing straight to the same implementation as the old ones.
2975 Given that, new callers will simply provide a too-big buffer to these
2976 functions. Any applications/libraries out there that embed jmp_buf or
2977 ucontext_t in an ABI-relevant data structure that have already been rebuilt
2978 against 2.19 headers will have to rebuilt again. This is necessary in any
2979 case to revert the breakage in their ABI caused by the glibc change.
2981 * Support for file description locks is added to systems running the
2982 Linux kernel. The standard file locking interfaces are extended to
2983 operate on file descriptions, not file descriptors, via the use of
2984 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
2985 are associated with an open file instead of a process.
2987 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
2989 * The minimum Linux kernel version that this version of the GNU C Library
2990 can be used with is 2.6.32.
2992 * Running the testsuite no longer terminates as soon as a test fails.
2993 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
2994 with PASS or FAIL lines for individual tests. A summary of the results is
2995 printed, including a list of failing lists, and "make check" exits with
2996 error status if there were any unexpected failures. "make check
2997 stop-on-test-failure=y" may be used to keep the old behavior.
2999 * The am33 port, which had not worked for several years, has been removed
3002 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3003 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3004 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3005 conflicted with POSIX (support for which was removed in 2.19), the
3006 interfaces those macros enabled remain available when compiling with
3007 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3008 test macros defined.
3010 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3012 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3013 This may improve lock scaling of existing programs on TX capable systems.
3014 The lock elision code is only built with --enable-lock-elision=yes and
3015 then requires a GCC version supporting the TX builtins. With lock elision
3016 default mutexes are elided via __builtin_tbegin, if the cpu supports
3017 transactions. By default lock elision is not enabled and the elision code
3020 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3021 copy the path argument. This allowed programs to cause posix_spawn to
3022 deference a dangling pointer, or use an unexpected pathname argument if
3023 the string was modified after the posix_spawn_file_actions_addopen
3026 * All supported architectures now use the main glibc sysdeps directory
3027 instead of some being in a separate "ports" directory (which was
3028 distributed separately before glibc 2.17).
3030 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3031 On configurations that support it (all Linux configurations), it's now
3032 used regardless of the --enable-add-ons switch to configure. It is no
3033 longer possible to build such configurations without pthreads support.
3035 * Locale names, including those obtained from environment variables (LANG
3036 and the LC_* variables), are more tightly checked for proper syntax.
3037 setlocale will now fail (with EINVAL) for locale names that are overly
3038 long, contain slashes without starting with a slash, or contain ".." path
3039 components. (CVE-2014-0475) Previously, some valid locale names were
3040 silently replaced with the "C" locale when running in AT_SECURE mode
3041 (e.g., in a SUID program). This is no longer necessary because of the
3044 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3045 with application code using Intel MPX instructions. (With all previous
3046 versions, the MPX register state could be clobbered when making calls
3047 into or out of a shared library.) Note that while the new dynamic
3048 linker is compatible with all known x86 hardware whether or not it
3049 supports Intel MPX, some x86 instruction-set emulators might fail to
3050 handle the new instruction encodings. This is known to affect Valgrind
3051 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3052 release), and might affect other tools that do instruction emulation.
3054 * Support for loadable gconv transliteration modules has been removed.
3055 The support for transliteration modules has been non-functional for
3056 over a decade, and the removal is prompted by security defects. The
3057 normal gconv conversion modules are still supported. Transliteration
3058 with //TRANSLIT is still possible, and the //IGNORE specifier
3059 continues to be supported. (CVE-2014-5119)
3061 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3062 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3063 resulting a denial-of-service security vulnerability in applications which
3064 use functions related to iconv. (CVE-2014-6040)
3068 * The following bugs are resolved with this release:
3070 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3071 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3072 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3073 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3074 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3075 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3076 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3077 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3078 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3079 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3080 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3081 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3082 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3083 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3084 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3085 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3086 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3087 16431, 16453, 16474, 16506, 16510, 16529
3089 * Slovenian translations for glibc messages have been contributed by the
3090 Translation Project's Slovenian team of translators.
3092 * The public headers no longer use __unused nor __block. This change is to
3093 support compiling programs that are derived from BSD sources and use
3094 __unused internally, and to support compiling with Clang's -fblock
3095 extension which uses __block.
3097 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3098 large collation sequences to optimize multiple passes. This cache
3099 computation may overflow for large collation sequences and may cause a
3100 stack or buffer overflow. This is now fixed to use a slower algorithm
3101 which does not use a cache if there is an integer overflow.
3103 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3104 rules for large collation sequences to optimize multiple passes and falls
3105 back to alloca if malloc fails, resulting in a possible stack overflow.
3106 The implementation now falls back to an uncached collation sequence lookup
3109 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3110 initialized for static applications resulting in the security feature
3111 being disabled. The pointer guard is now correctly initialized to a
3112 random value for static applications. Existing static applications need
3113 to be recompiled to take advantage of the fix (bug 15754).
3115 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3116 to the d_name member of struct dirent, or omit the terminating NUL
3117 character. (Bugzilla #14699).
3119 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3120 aligned_alloc functions could allocate too few bytes or corrupt the
3121 heap when passed very large allocation size values (Bugzilla #15855,
3124 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3125 for AF_INET6 has been fixed (Bugzilla #16072).
3127 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3128 pap_CW, quz_PE, the_NP.
3130 * Substantially revised locales: gd_GB, ht_HT
3132 * The LC_ADDRESS field was updated to support country_car for almost all
3135 * ISO 1427 definitions were updated.
3137 * ISO 3166 definitions were updated.
3139 * The localedef utility now supports --big-endian and --little-endian
3140 command-line options to generate locales for a different system from that
3141 for which the C library was built.
3143 * Binary locale files now only depend on the endianness of the system for
3144 which they are generated and not on other properties of that system. As a
3145 consequence, binary files generated with new localedef may be incompatible
3146 with old versions of the GNU C Library, and binary files generated with
3147 old localedef may be incompatible with this version of the GNU C Library,
3148 in the following circumstances:
3150 + Locale files may be incompatible on m68k systems.
3152 + Locale archive files (but not separate files for individual locales) may
3153 be incompatible on systems where plain "char" is signed.
3155 * The configure option --disable-versioning has been removed. Builds with
3156 --disable-versioning had not worked for several years.
3158 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3159 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3161 * SystemTap probes for malloc have been introduced.
3163 * SystemTap probes for slow multiple precision fallback paths of
3164 transcendental functions have been introduced.
3166 * Support for powerpc64le has been added.
3168 * The soft-float powerpc port now supports e500 processors.
3170 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3172 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3173 set of header declarations that are enabled by default, even when other
3174 feature test macros or compiler options such as -std=c99 would otherwise
3175 disable some of those declarations.
3177 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3178 conflict with POSIX. The libbsd-compat library (which was a dummy library
3179 that did nothing) has also been removed.
3181 * Preliminary documentation about Multi-Thread, Async-Signal and
3182 Async-Cancel Safety has been added.
3184 * Change of ABI data structures for s390 and s390x:
3185 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3186 allow for future hardware extensions. All library functions that accept or
3187 return these structures were versioned in order to provide backwards
3188 compatibility with existing code. However, not all cases can be handled
3189 with interface versioning. If an application embeds either structure into
3190 another structure and that structure is passed to another compilation unit
3191 which expects the newer larger-sized object then any access to the new
3192 fields will result in undefined behaviour. Similarly any access to fields
3193 that were moved by the enlarging of the structures will cause undefined
3194 behaviour. To fix the undefined behaviour all objects that are part of the
3195 final in-memory image must agree on the size of structures, and this may
3196 require recompilation.
3200 * The following bugs are resolved with this release:
3202 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3203 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3204 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3205 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3206 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3207 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3208 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3209 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3210 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3211 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3212 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3213 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3214 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3217 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3218 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3219 Distributions can re-enable building and using pt_chown via the new configure
3220 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3221 considerable security risks and should only be used if the distribution
3222 understands and accepts the risks.
3224 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3227 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3228 fixed (Bugzilla #15330).
3230 * Add support for calling C++11 thread_local object destructors on thread
3231 and program exit. This needs compiler support for offloading C++11
3232 destructor calls to glibc.
3234 * Improved worst case performance of libm functions with double inputs and
3237 * Support for priority inherited mutexes in pthread condition variables on
3238 non-x86 architectures.
3240 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3242 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3244 * Optimized string functions for ARM. Implemented by Will Newton and
3247 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3249 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3252 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3253 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3255 * Added a benchmark framework to track performance of functions in glibc.
3257 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3258 It is based on draft TS 18661 and currently enabled as a GNU extension.
3260 * On Linux, the clock function now uses the clock_gettime system call
3261 for improved precision, rather than old times system call.
3263 * Added support for version-3 tz format files. This is needed when using
3264 the tz database release 2013e or later, and affects a few unusual cases --
3265 currently only TZ='America/Godthab' for time stamps after 2037.
3267 * Added new API functions pthread_getattr_default_np and
3268 pthread_setattr_default_np to get and set the default pthread
3269 attributes of a process.
3271 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3272 This may improve lock scaling of existing programs on TSX capable systems.
3273 When the --enable-lock-elision=yes parameter is specified at configure
3274 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3277 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3278 availability). Implemented by Ryan S. Arnold.
3280 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3284 * The following bugs are resolved with this release:
3286 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3287 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3288 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3289 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3290 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3291 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3292 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3293 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3294 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3295 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3296 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3297 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3298 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3299 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3300 14879, 14889, 14893, 14898, 14914.
3302 * Optimization of memcpy for MIPS.
3304 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3305 EMFILE has been fixed (Bugzilla #14889).
3307 * The add-on ports collection is now distributed in the "ports" subdirectory
3308 of the main GNU C Library distribution, rather than separately.
3310 * Port to ARM AArch64 contributed by Linaro.
3312 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3313 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3315 Implemented by Andreas Krebbel.
3317 * The new function secure_getenv allows secure access to the environment,
3318 returning NULL if running in a SUID/SGID process. This function replaces
3319 the internal function __secure_getenv.
3321 * SystemTap static probes have been added into the dynamic linker.
3322 Implemented by Gary Benson.
3324 * Optimizations of string functions strstr, strcasestr and memmem.
3325 Implemented by Maxim Kuvyrkov.
3327 * The minimum Linux kernel version that this version of the GNU C Library
3328 can be used with is 2.6.16.
3330 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3331 powerpc POWER7. Implemented by Will Schmidt.
3333 * New configure option --disable-nscd builds the C library such that it
3334 never attempts to contact the Name Service Caching Daemon (nscd).
3335 New configure option --disable-build-nscd avoids building nscd itself;
3336 this is the default if --disable-nscd is used.
3338 * Improved support for cross-compilation, including cross-testing and
3339 bootstrap builds without a previously built glibc.
3341 * Several testsuite tests are now able to test multiple IFUNC variants of an
3342 interface, rather than just testing the one that would be chooen by
3345 * New configure options --with-bugurl and --with-pkgversion, for
3346 distributors to use to embed their bug-reporting and package version
3347 information in --help and --version output.
3349 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3350 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3351 allows creation of chroots without the procfs mounted on /proc.
3353 * The `crypt' function now fails if passed salt bytes that violate the
3354 specification for those values. On Linux, the `crypt' function will
3355 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3356 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3357 when the mode is enabled.
3359 * The `clock_*' suite of functions (declared in <time.h>) is now available
3360 directly in the main C library. Previously it was necessary to link with
3361 -lrt to use these functions. This change has the effect that a
3362 single-threaded program that uses a function such as `clock_gettime' (and
3363 is not linked with -lrt) will no longer implicitly load the pthreads
3364 library at runtime and so will not suffer the overheads associated with
3365 multi-thread support in other code such as the C++ runtime library.
3367 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3372 * The following bugs are resolved with this release:
3374 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3375 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3376 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3377 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3378 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3379 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3380 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3381 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3382 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3383 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3384 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3385 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3386 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3387 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3388 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3389 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3390 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3391 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3392 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3393 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3394 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3395 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3398 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3399 configuring glibc with:
3400 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3401 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3402 Implemented by H.J. Lu.
3406 + define static_assert
3408 + do not declare gets
3410 + declare at_quick_exit and quick_exit also for ISO C11
3412 + aligned_alloc. NB: The code is deliberately allows the size parameter
3413 to not be a multiple of the alignment. This is a moronic requirement
3414 in the standard but it is only a requirement on the caller, not the
3417 + timespec_get added
3419 + uchar.h support added
3421 + CMPLX, CMPLXF, CMPLXL added
3423 Implemented by Ulrich Drepper.
3425 * Support for the IA-64 has been moved to ports.
3427 * Remove support for anything but ELF binary format
3429 * Checking versions of poll, ppoll added.
3430 Implemented by Ulrich Drepper.
3432 * More generic and 64-bit performance optimizations to math functions.
3433 Implemented by Ulrich Drepper.
3435 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3436 headers and functions available at compile time as they were before
3437 version 2.14. This option will be removed at some time in the future
3438 after the TI-RPC library becomes fully sufficient for the needs of
3439 existing applications.
3441 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3442 Note that glibc is not expected to work with any Linux kernel version
3445 * New header <sys/auxv.h> and function getauxval allowing easy access to
3446 the AT_* key-value pairs passed from the Linux kernel. The header also
3447 defines the HWCAP_* bits associated with the AT_HWCAP key.
3449 * New locales: mag_IN
3451 * New configure option --enable-systemtap builds SystemTap static probes
3452 into libc for setjmp and longjmp and into libpthread for various operations.
3453 So far the setjmp/longjmp probes and some of the libpthread probes are
3454 provided only for i*86 and x86_64.
3455 Implemented by Roland McGrath and Rayson Ho.
3457 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3459 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3462 * More optimized functions for SPARC. Implemented by David S. Miller.
3464 * Improved support for cross-compilation, especially bootstrap builds
3465 without a previously built glibc.
3467 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3468 Chris Metcalf from Tilera.
3470 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3471 now supported for ARM processors.
3473 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3474 as the name of the dynamic linker, to distinguish it from the
3475 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3477 * Support for CRIS has been removed from ports.
3479 * A new class of installed header has been documented for low-level
3480 platform-specific functionality. PowerPC added the first instance with a
3481 function to provide time base register access. Contributed by Tulio
3482 Magno Quites Machado Filho.
3484 * ix86 configurations now install header files that are consistent with
3485 what x86-64 configurations install. These same header files can be used
3486 for -m32, -m64, or -mx32 builds.
3487 Contributed by H.J. Lu.
3489 * Math library bug fixes. A thorough audit of all open math library bugs was
3490 conducted by Joseph Myers. Significant progress was made on many math
3491 library bugs resulting in more accurate exceptions and function results.
3492 Many thanks to all those that contributed including Andreas Jaeger for his
3493 patch review and work on the x87 trigonometric instruction issues.
3495 * Timezone data is no longer installed. Timezone-related binaries and scripts
3496 will continue to be installed. Users should obtain their timezone data from
3497 their distribution provider or from the tzdata package at
3498 <ftp://munnari.oz.au/pub/>.
3502 * The following bugs are resolved with this release:
3504 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3505 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3506 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3507 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3508 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3509 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3510 13484, 13506, 13515, 13523, 13524, 13538, 13540
3512 * New program pldd to list loaded object of a process
3513 Implemented by Ulrich Drepper.
3515 * Add nss_db support back to glibc. No more dependency on Berkeley db
3516 and support for initgroups lookups.
3517 Implemented by Ulrich Drepper.
3519 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3520 Contributed by HJ Lu.
3522 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3523 Contributed by HJ Lu.
3525 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3526 on x86-32 and x86-64.
3527 Contributed by Liubov Dmitrieva.
3529 * Optimized strchr and strrchr for SSE on x86-32.
3530 Contributed by Liubov Dmitrieva.
3532 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3533 for x86-64 and x86-32.
3534 Contributed by Liubov Dmitrieva.
3536 * New interfaces: scandirat, scandirat64
3537 Implemented by Ulrich Drepper.
3539 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3540 Implemented by Ulrich Drepper.
3542 * nscd now also caches the netgroup database.
3543 Implemented by Ulrich Drepper.
3545 * Integrate libm with gcc's -ffinite-math-only option.
3546 Implemented by Ulrich Drepper.
3548 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3549 to math functions. Implemented by Ulrich Drepper.
3551 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3552 Implemented by Ulrich Drepper.
3554 * New Linux interfaces: process_vm_readv, process_vm_writev
3556 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3557 Implemented by Ulrich Drepper.
3559 * Optimized nearbyint and strcasecmp for PPC.
3560 Implemented by Adhemerval Zanella.
3562 * New locales: bho_IN, unm_US, es_CU, ta_LK
3566 * The following bugs are resolved with this release:
3568 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3569 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3570 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3571 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3572 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3573 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3574 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3575 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3576 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3577 12795, 12811, 12813, 12814, 12841
3579 * The RPC implementation in libc is obsoleted. Old programs keep working
3580 but new programs cannot be linked with the routines in libc anymore.
3581 Programs in need of RPC functionality must be linked against TI-RPC.
3582 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3584 Visible changes of this change include (obviously) the inability to link
3585 programs using RPC functions without referencing the TI-RPC library and the
3586 removal of the RPC headers from the glibc headers.
3587 Implemented by Ulrich Drepper.
3589 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3590 syncfs, setns, sendmmsg
3592 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3593 yue_HK, lij_IT, mhr_RU
3595 * New encodings: CP770, CP771, CP772, CP773, CP774
3597 * New program sotruss to trace calls through PLTs
3598 Implemented by Ulrich Drepper.
3600 * The malloc hook implementation is marked deprecated and will be removed
3601 from the default implementation in the next version. The design never
3602 worked ever since the introduction of threads. Even programs which do
3603 not create threads themselves can use multiple threads created internally.
3607 * The following bugs are resolved with this release:
3609 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3610 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3611 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3612 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3615 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3617 * POWER7 optimizations: memset, memcmp, strncmp
3619 * New optimized string functions for x86-64: strnlen (SSE2),
3620 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3621 Implemented by Ulrich Drepper.
3625 * The following bugs are resolved with this release:
3627 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3628 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3629 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3630 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3631 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3632 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3633 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3634 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3636 * New interfaces: pthread_getname_np, pthread_setname_np
3638 * New Linux interface: recvmmsg
3640 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3642 * The dynamic linker now recognizes supported ABI versions from the
3643 EI_ABIVERSION field in the ELF header.
3644 Implemented by Ulrich Drepper.
3646 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3647 will not be used to fill in password fields in the passwd.byname replies.
3648 Instead it is used to synthesize the shadow.byname table, should it be
3649 missing. This is a useful mode in some installations involving Solaris.
3650 Implemented by Ulrich Drepper.
3652 * New locales: kok_IN, sq_MK, cv_RU
3656 * The following bugs are resolved with this release:
3658 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3659 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3660 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3661 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3662 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3663 10789, 10817, 10823, 10840, 10847
3665 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3667 Implemented by Ulrich Drepper.
3669 * Checking version of longjmp added that fails if an uninitialized stack
3670 frame would be created. Implemented by Ulrich Drepper.
3672 * STT_GNU_IFUNC is now supported in static executables.
3673 Implemented by H.J. Lu.
3675 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3677 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3678 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3679 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3680 Contributed by H.J. Lu.
3682 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3683 Implemented by Ulrich Drepper.
3685 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3687 Contributed by H.J. Lu.
3689 * Support for fma instruction in AVX on x86-64.
3690 Implemented by H.J. Lu and Ulrich Drepper.
3692 * AVX support in x86-64 auditing support in ld.so.
3693 Implemented by H.J. Lu.
3695 * STB_GNU_UNIQUE support added.
3696 Implemented by Ulrich Drepper.
3698 * Implement second fallback mode for optimized DNS lookup for even more
3699 broken environments. If two requests from the same port are not
3700 handled correctly close the socket and open a new one before sending
3701 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3702 can be used to select this mode right away, instead of rediscovering the
3703 necessity is every process again.
3704 Implemented by Ulrich Drepper.
3706 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3707 Implemented by Adam Tkac.
3709 * Optimized iconv conversions for S390x.
3710 Implemented by Andreas Krebbel.
3712 * Using condvars with PI mutexes is now more efficient due to kernel
3713 support for requeueing to PI futexes. NPTL support added for x86-64.
3714 Implemented by Ulrich Drepper.
3716 * New locales: ps_AF, my_MM
3720 * The following bugs are resolved with this release:
3722 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3723 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3724 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3725 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3726 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3728 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3729 Implemented by Ulrich Drepper.
3731 * New Linux interfaces: accept4, fallocate, fallocate64.
3732 Implemented by Ulrich Drepper.
3734 * Correct declarations of string function when used in C++ code. This
3735 could lead to compile errors for invalid C++ code.
3737 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3740 * New POSIX 2008 interface: psiginfo
3741 Implemented by Ulrich Drepper.
3743 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3744 Implemented by Ulrich Drepper.
3746 * Support for selecting between multiple function definitions at runtime
3747 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3749 * The libcrypt library can now use the hash function implementations in
3750 NSS. Implemented by Ulrich Drepper.
3752 * The malloc implementation can be compiled to be less memory efficient
3753 but higher performing in multi-threaded programs.
3754 Implemented by Ulrich Drepper.
3756 * New locales: nan_TW@latin, ks_IN
3758 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3759 Implemented by Ulrich Drepper.
3761 * Extended printf hook support. It is possible to use user-defined types
3762 and extend existing format specifiers.
3763 Implemented by Ulrich Drepper.
3765 * Handling for group shadow files has been added.
3766 Implemented by Ulrich Drepper.
3768 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3769 servers (the case, e.g., for some people using the built-in DNS
3770 server in ADSL modems/routers). There is a once-per-process timeout
3771 in case of a broken server. To avoid it, users can run nscd or put
3772 'options single-request' in /etc/resolv.conf.
3773 Implemented by Ulrich Drepper.
3777 * The following bugs are resolved with this release:
3779 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3780 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3781 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3782 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3783 6968, 6974, 6980, 6995, 7008, 7009, 7029
3785 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3786 up at the same time. Implemented by Ulrich Drepper.
3788 * TLS descriptors for LD and GD on x86 and x86-64.
3789 Implemented by Alexandre Oliva.
3791 * getaddrinfo now handles DCCP and UDPlite.
3792 Implemented by Ulrich Drepper.
3794 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3795 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3796 Implemented by Ulrich Drepper.
3798 * New implementation of memmem, strstr, and strcasestr which is O(n).
3799 Implemented by Eric Blake.
3801 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3803 * Implement "e" option for popen to open file descriptor with the
3804 close-on-exec flag set. Implemented by Ulrich Drepper.
3806 * Implement "b" mode for fmemopen. In this mode writes writes don't
3807 implicitly add a NUL byte and seeks from the end of the buffer really
3808 use the buffer end, not the string length as the basis.
3809 Implemented by Ulrich Drepper.
3811 * Many functions, exported and internal, now atomically set the close-on-exec
3812 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3814 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3816 Implemented by Pravin Satpute.
3818 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3822 * The following bugs are resolved with this release:
3824 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3825 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3826 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3827 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3828 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3829 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3830 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3832 * New locales: bo_CN, bo_IN, shs_CA.
3834 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3836 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3837 Implemented by Pravin Satpute.
3839 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3841 * nscd caches now all timeouts for DNS entries
3842 Implemented by Ulrich Drepper.
3844 * nscd is more efficient and wakes up less often.
3845 Implemented by Ulrich Drepper.
3847 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3848 vdprintf, and obstack_vprintf.
3849 Implemented by Jakub Jelinek.
3851 * Faster memset for x86-64.
3852 Implemented by Harsha Jagasia and H.J. Lu.
3854 * Faster memcpy on x86.
3855 Implemented by Ulrich Drepper.
3857 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3858 Implemented by Ulrich Drepper.
3860 * Faster sqrt and sqrtf implemention for some PPC variants.
3861 Implemented by Steven Munroe.
3865 * The following bugs are resolved with this release:
3867 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3868 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3869 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3870 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3871 5071, 5103, 5104, 5112, 5113, 5184, 5186
3873 * More checking functions: fread, fread_unlocked, open*, mq_open.
3874 Implemented by Jakub Jelinek and Ulrich Drepper.
3876 * Extend fortification to C++. Implemented by Jakub Jelinek.
3878 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3879 by not recognizing 'a' as a modifier when those specs are requested.
3880 Implemented by Jakub Jelinek.
3882 * PPC optimizations to math and string functions.
3883 Implemented by Steven Munroe.
3885 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3886 options to be passed. Implemented by Ulrich Drepper.
3888 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3890 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3891 Implemented by Ulrich Drepper.
3893 * Handle private futexes in the NPTL implementation.
3894 Implemented by Jakub Jelinek and Ulrich Drepper.
3896 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3897 Implemented by Roland McGrath and Ulrich Drepper.
3899 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3901 * SHA-256 and SHA-512 based password encryption.
3902 Implemented by Ulrich Drepper.
3904 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3905 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3908 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3909 Implemented by Ulrich Drepper.
3913 * The following bugs are resolved with this release:
3915 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3916 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3917 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3918 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3919 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3920 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3921 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3924 * New Linux interfaces: epoll_pwait, sched_getcpu.
3926 * New generic interfaces: strerror_l.
3928 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3932 * The following bugs are resolved with this release:
3934 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3935 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3936 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3937 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3938 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3939 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3940 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3941 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3942 3225, 3251, 3252, 3253, 3273
3944 * For Linux, the sorting of addresses returned by getaddrinfo now also
3945 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3946 Implemented by Ulrich Drepper.
3948 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3949 Implemented by Ulrich Drepper.
3951 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3953 * New iconv module for MIK. Contributed by Alexander Shopov.
3955 * For sites with broken group and/or passwd database, the auto-propagate
3956 option of nscd can prevent creating ID lookup entries from the results
3957 of a name lookup and vice versa. This usually is no problem but some
3958 site might have problems with the default behavior.
3959 Implemented by Ulrich Drepper.
3961 * Iterating over entire database in NIS can be slow. With the
3962 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3963 to trade time for memory. The entire database will be read at once.
3964 Implemented by Ulrich Drepper.
3966 * The interfaces introduced in RFC 3542 have been implemented by
3969 * Support for the new ELF hash table format was added by Ulrich Drepper.
3971 * Support for priority inheritance mutexes added by Jakub Jelinek and
3974 * Support for priority protected mutexes added by Jakub Jelinek.
3976 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
3977 or_IN, csb_PL, fy_NL, sr_ME.
3981 * More overflow detection functions.
3983 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
3984 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
3986 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
3987 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
3988 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
3989 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
3990 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
3991 by Masahide Washizawa.
3993 * It is now possible to install audit libraries for the dynamic linker using
3994 LD_AUDIT. Implemented by Ulrich Drepper.
3996 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
3997 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
3998 For a libc and libpthread that works well on Linux 2.4 kernels, we
3999 recommend using the stable 2.3 branch.
4001 * The new function open_wmemstream acts like open_memstream,
4002 but uses a wchar_t wide character buffer.
4004 * The new function ppoll is an improved version of poll, similar to pselect.
4006 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4007 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4008 renameat, unlinkat, linkat, symlinkat, readlinkat.
4010 * New Linux kernel system calls: unshare,
4011 inotify_init, inotify_add_watch, inotify_rm_watch.
4013 * The euidaccess function is now also known by the alias eaccess,
4014 for compatibility with some other systems.
4016 * Timezone data updated to 2006b version.
4020 * The following bugs are resolved with this release:
4022 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4023 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4024 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4025 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4026 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4027 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4029 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4031 * As of this release, GCC 4 can be used to compile the C Library.
4033 * Timezone data updated to 2005m version.
4037 * The following bugs are resolved with this release:
4039 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4040 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4041 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4042 777, 787, 821, 822, 823, 825
4044 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4048 * Support for RFC 3678. Real implementations exist only for Linux so far.
4049 Implemented by Ulrich Drepper.
4051 * nscd can now cache entries persistently. Expiring entries are reloaded.
4052 For speedups the cache can be shared in memory with client processes.
4053 Implemented by Ulrich Drepper.
4055 * nscd can now perform SELinux checks.
4056 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4058 * getaddrinfo queries are now cached. Canonical name lookup is performed
4060 Implemented by Ulrich Drepper.
4062 * The nothrow function attribute is used when headers are used by gcc when
4063 compiling C code. This can avoid significant amounts of exception
4066 * The malloc functions perform more error checking and are stricter when
4067 it comes to reacting on errors. The default action is to terminate
4068 the process after showing an error message. Implemented by Ulrich Drepper.
4070 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4071 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4073 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4074 namespaces using the new function dlmopen(). This feature is of course,
4075 like most other dynamic loading functionality, not available in statically
4076 linked applications. Implemented by Ulrich Drepper.
4078 * Low-overhead boundary checking variants of string and some stdio functions
4079 were added. These are to be used in conjunction with a gcc patch by
4080 Jakub Jelinek which adds calls to these functions if possible.
4081 Implemented by Jakub Jelinek and Ulrich Drepper.
4083 * Old code for several operating systems and machine architectures that
4084 have not been in working condition in a long time have been removed from
4085 the main source tree maintained by the GNU C Library's maintainers.
4086 These files are now reside in the separate `ports' source module
4087 that is usable as an add-on when building the library.
4091 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4092 interrogate the dynamic linker, compatible with the Solaris interface.
4094 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4095 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4097 * getifaddrs now uses the netlink interface on Linux to get its information.
4098 Implemented by Thorsten Kukuk.
4100 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4101 Implemented by Ulrich Drepper.
4103 * support for non-executable stacks on x86 has been added. Changes mostly
4106 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4109 * getaddrinfo now performs destination address selection according to
4114 * Thread-safe interfaces for many functions that access locale data
4115 were added in version 2.3, but these features were omitted from NEWS.
4116 Many functions have variants with an `_l' suffix that take a `locale_t'
4117 object as a parameter rather than consulting the current locale.
4118 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4119 create and maintain `locale_t' objects. Additionally, the new function
4120 `uselocale' sets "the current locale" (as used by functions not so
4121 parameterized) set for an individual thread. These features were added
4122 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4124 * The functions getresuid, getresgid, setresuid, and setresgid, which
4125 have long been available on Linux, are now declared in <unistd.h>
4126 and are now also available on the Hurd.
4128 * ELF thread-local storage support (TLS) now works on x86-64.
4130 * The new dynamic string token $LIB is expanded in shared library names.
4131 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4133 * Aldy Hernandez contributed complete software floating point support for
4134 PowerPC machines with no FPU.
4136 * fexecve is implemented on Linux.
4138 * The `btowc' function should work at least twice as fast due to
4139 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4141 * With approriate thread add-ons cancelable functions are now implemented
4142 in libc.so as well. No need to call the function in libpthread. This
4143 change allowed to finally disable the incorrect and expensive handling
4144 of weak definition in ld.so.
4146 * Yet more PLT entries in libc.so have been removed. We finally arrived
4147 at the bare minimum. Startup times improved appropriately.
4149 * Support for the new Linux/x86 system call interface was added. The
4150 AT_SYSINFO auxiliary vector entry is recognized and handled.
4154 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4157 * iconv (the program and the interface) now accepts empty names (excluding
4158 options like //TRANSLIT) to mean "use charset of current locale".
4160 * localedef can now transliterate characters in strings which are not in
4161 the provided charmap. The information from the input locale is used.
4163 * Prelinking support was added for ELF targets. This requires additional
4164 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4166 * Read-only stdio streams now use mmap to speed up operation by eliminating
4167 copying and buffer underflows. To use add 'm' to the mode string of
4168 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4170 * The malloc functions were completely rewritten by Wolfram Gloger based
4171 on Doug Lea's malloc-2.7.0.c.
4173 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4174 implementation of regex.
4176 * Bruno Haible upgraded the iconv and locale implementation to support
4179 * Contents of the LC_* and LANG environment variables in the CEN style are
4180 not recognized anymore. It never was used. Change by Ulrich Drepper.
4182 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4183 thread-local storage (TLS) ABI on some platforms.
4184 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4186 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4187 EUC-JISX0213, and TSCII.
4189 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4190 BSD-compatible interface for getting all network interface addresses.
4191 Implementation for IPv4 by Roland McGrath.
4193 * Loading of locale data is faster due to the introduction of a locale
4194 archive. Implemented by Roland McGrath and Ulrich Drepper.
4196 * Startup times are significantly reduced by not using exported functions
4197 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4200 * Steven Munroe contributed a port to PowerPC64/Linux.
4204 * The Hurd now uses the GNU libio implementation of stdio rather than the
4205 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4207 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4208 with the same behavior as the Linux system call of the same name.
4212 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4213 128-bit long double format.
4215 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4216 IBM1161, and IBM1162 charsets.
4218 * Andreas Jaeger contributed a port to x86-64/Linux.
4220 * Peter Bruin contributed a port to PowerPC/Hurd.
4222 * libc functions using I/O streams now can handle wide-oriented streams
4225 * optimizations in the dynamic linker. Binaries created by recent binutils
4226 versions start up quicker due to reduced time spent on relocations.
4228 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4232 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4233 asinh, atanh, j0 for the 128-bit long double format.
4235 * Bruno Haible updated all the code handling Unicode in some form to
4236 support Unicode 3.1.
4238 * Speed of regex for single-byte locales is back to previous levels.
4239 Patch by Isamu Hasegawa.
4241 * Alpha, SPARC, and IA-64 now also using floating stacks.
4243 * Startup time of internationalized applications greatly improved through
4244 iconv cache. Use iconvconfig to generate the cache file.
4245 Contributed by Ulrich Drepper.
4247 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4248 severe performance problems. Patch by David Mosberger.
4250 * The Hurd port got a lot more functionality like AIO, various stdio
4251 extensions, etc. Mainly done by Roland McGrath.
4253 * mtrace can now lookup symbols in shared libraries.
4257 * Intel's IA-64 math library is largely integrated. It provides fast and
4258 accurate implementatations for most basic and standard math functions
4259 in float, double, and long double format.
4261 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4262 and asin for the 96-bit long double format and asin, log, tan for the
4263 128-bit long double format.
4265 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4266 The basic double functions exist today. Contributed by Abraham Ziv
4267 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4268 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4270 * An asynchronous name lookup library was added. The interface is designed
4271 after POSIX AIO. The proposal was circulated beforehand to get comments.
4272 No negative ones came in. Implemented by Ulrich Drepper.
4274 * Port to S390/64bit contributed by Martin Schwidefsky
4275 <schwidefsky@de.ibm.com>.
4277 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4278 of functions for Linux/IA-64.
4280 * The RPC code is now thread safe. Threads can now use the same service
4281 of different services at the same time. Patch by Eric Norum
4282 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4284 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4285 family of functions for Linux/S390.
4287 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4288 of functions for Linux/x86.
4290 * Port to Linux/CRIS contributed by Axis Communications.
4294 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4295 we can now check for namespace violations and missing declarations. The
4296 result is that almost all headers are now Unix-compliant (as defined in
4297 the upcoming XPG6). The negative side is that some programs might need
4298 corrections, too, if they depend on the incorrect form of the headers in
4299 previous versions which defined too many symbols and included too many
4302 * regex now handles multibyte character sets correctly.
4303 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4305 * iconv (the program) does now conform to the upcoming XPG6 and handles
4306 charmaps. Instead of the charset names the path of charmaps can be
4307 provided and the conversion happens based on this data.
4308 Contributed by Ulrich Drepper.
4310 * The locale program now provides detailed information about the installed
4315 only lists the names of the supported locales
4319 provides details such as country, language, and codeset name.
4320 Contributed by Ulrich Drepper.
4324 * The gencat program now parses the input file according to the charset
4325 selected by the LC_CTYPE category. This is important for stateful
4326 character sets. To make generating catalogs easier there is a way
4327 to overwrite the charset selected by the locale: before the first
4328 message or $ quote line the catalog can contain a line like
4330 $ codeset=ISO-8859-2
4332 to select the charset (ISO-8859-2 in this case).
4334 Implemented by Shinya Hanataka and Ulrich Drepper.
4336 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4337 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4338 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4340 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4341 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4343 * The LANGUAGE environment variable is now ignored unless the locale is
4344 changed from the default "C" locale.
4346 * The usual bug fixes.
4350 * Greg McGary added runtime support for bounds checking using gcc's
4351 new -fbounded-pointers option. ix86 target is complete. PowerPC
4354 * Thorsten Kukuk added secure mode support to nscd.
4356 * The Berkeley db libraries have been removed.
4358 Related, the nss_db module is now in a separate package since it
4359 obviously requires a database library being available.
4361 * Wide character I/O streams implemented by Ulrich Drepper.
4363 * Functions from the extended socket API added by Ulrich Drepper.
4365 * Functions feenableexcept and fedisableexcept to control the
4366 behaviour of individual exceptions have been added by Andreas Jaeger.
4368 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4370 * The resolver code has been updated from bind 8.2.3-T5B which supports
4371 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4374 This change could in some situations effect backward compatibility. Since
4375 now `_res' is a thread-local instead of a global variable, modifying it
4376 in one thread does not have any effect in other threads.
4378 The resolver library was also extended to allow IPv6 as the transport
4379 protocol for the requests. This work was done by Stig Venaas.
4381 * Compatibility code for K&R C compilers has been removed from the
4382 header files. A ISO C compiler is needed to use the library
4383 (conforming to either C89 or C99 standard).
4385 * Complete rewrite of the localedef program to support multibyte character
4386 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4387 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4388 Implemented by Ulrich Drepper.
4390 Bruno Haible significantly improved the generation and use of the data
4391 structures for the wide character tables.
4393 * Plural handling in gettext implemented by Ulrich Drepper.
4395 * The utmp daemon has been removed.
4397 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4399 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4402 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4404 * POSIX barriers implemented by Kaz Kylheku.
4406 * POSIX spawn function family implemented by Ulrich Drepper.
4408 * POSIX spinlocks are now available.
4410 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4412 * the configure option --enable-kernel=X.Y.Z allows to strip out
4413 compatibility for kernel versions before X.Y.Z. This is currently only
4414 implemented for Linux.
4416 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4417 field sin6_scope_id. This means that all programs using IPv6 should be
4418 recompiled. Don't expect binary compatibility with previous glibc
4421 * various conversion modules for IBM character sets contributed by
4424 * IA-64 port by Jes Sorensen and HJ Lu.
4438 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4440 * New xdr functions are added; some rpc functions are now 64bit clean.
4442 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4444 * Fixed known incompatibilities with glibc 2.0.
4446 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4448 * Optimized a number of functions (especially the ELF dynamic loader).
4450 * Update timezone data files.
4452 * lots of charmaps corrections
4454 * some new locale definitions and charmaps
4459 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4460 conform to POSIX member type requirements. Symbol versions have been
4461 adjusted as needed within the library, and for direct use by applications,
4462 but there is potential for problems if third-party libraries use
4463 struct timeval as part of their interface. This does not present
4464 a problem for X and other "essential" system libraries.
4466 * An additional locale model to support C++ Standard Library locale
4467 model and probably more was implemented by Ulrich Drepper.
4469 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4472 * Miles Bader provided the `argp' function family to support hierachical
4473 command line argument parsing, layered on top of getopt.
4475 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4477 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4480 * scanf recognizes the %a and %A format for scanning floating point numbers.
4482 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4483 information and interfaces for the available integer types.
4485 * about 130 new math functions were added to implement the ISO C9x math
4488 * the new header <complex.h> contains definitions of the complex math
4489 functions from ISO C 9X.
4491 * the new header <tgmath.h> defines generic macros to use complex or
4492 real valued functions.
4494 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4496 * Andreas Jaeger provided a test suite for the math library.
4498 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4500 * Ulrich Drepper added character set conversion functions (iconv).
4502 * Optimized string functions have been added.
4504 * The localedata addon is now part of glibc.
4506 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4508 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4509 daemon for NSS (nscd).
4511 Missing a better place here are some numbers on improvements. Under
4512 Linux 2.1.125 un-tar-ing the kernel sources takes
4516 using local files 12.19s 6.88s 22.91s
4518 using NIS 13.92s 8.91s 26.34s
4520 using NIS & nscd 10.37s 7.34s 25.30s
4522 using NIS+ 27.57s 30.37s 640.46s
4524 using NIS+ & nscd 10.25s 7.83s 26.51s
4526 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4528 Keep in mind that non-namelookup related operations dominate above times.
4529 It was just a common complain that using NIS+ unpacking the kernel is
4532 [1] The old nscd implementation is not available anymore since it was
4533 distributed with glibc up to version 2.0.98 and thus is now replaced.
4535 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4537 * Mark Kettenis provided a Hesiod NSS module.
4539 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4540 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4542 * rcmd can now handle netgroups (Dick Streefland).
4544 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4547 * Support for the IPv6 protocol has been added to the socket API, as per the
4548 latest draft standards.
4550 * Support for Linux 2.2 has been added.
4552 * Interface changes relative to the latest 2.0.x release:
4553 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4554 addseverity NEW: Unix98
4555 alphasort64 NEW: LFS
4556 argp_err_exit_status NEW: argp, GNU ext
4557 argp_error NEW: argp, GNU ext
4558 argp_failure NEW: argp, GNU ext
4559 argp_help NEW: argp, GNU ext
4560 argp_parse NEW: argp, GNU ext
4561 argp_program_bug_address NEW: argp, GNU ext
4562 argp_program_version NEW: argp, GNU ext
4563 argp_program_version_hook NEW: argp, GNU ext
4564 argp_state_help NEW: argp, GNU ext
4565 argp_usage NEW: argp, GNU ext
4566 authdes_create NEW: Secure RPC
4567 authdes_getucred NEW: Secure RPC
4568 authdes_pk_create NEW: Secure RPC
4569 backtrace NEW: GNU ext.
4570 backtrace_symbols NEW: GNU ext.
4571 backtrace_symbols_fd NEW: GNU ext.
4573 cacosf NEW: ISO C 9x
4574 cacosh NEW: ISO C 9x
4575 cacoshf NEW: ISO C 9x
4576 cacoshl NEW: ISO C 9x
4577 cacosl NEW: ISO C 9x
4584 casinf NEW: ISO C 9x
4585 casinh NEW: ISO C 9x
4586 casinhf NEW: ISO C 9x
4587 casinhl NEW: ISO C 9x
4588 casinl NEW: ISO C 9x
4590 catanf NEW: ISO C 9x
4591 catanh NEW: ISO C 9x
4592 catanhf NEW: ISO C 9x
4593 catanhl NEW: ISO C 9x
4594 catanl NEW: ISO C 9x
4595 cbc_crypt NEW: Secure RPC
4599 ccoshf NEW: ISO C 9x
4600 ccoshl NEW: ISO C 9x
4606 cimagf NEW: ISO C 9x
4607 cimagl NEW: ISO C 9x
4608 clearerr_locked REMOVED
4609 clntunix_create NEW: sunrpc ext
4611 clog10 NEW: ISO C 9x
4612 clog10f NEW: ISO C 9x
4613 clog10l NEW: ISO C 9x
4623 cprojf NEW: ISO C 9x
4624 cprojl NEW: ISO C 9x
4626 crealf NEW: ISO C 9x
4627 creall NEW: ISO C 9x
4632 csinhf NEW: ISO C 9x
4633 csinhl NEW: ISO C 9x
4636 csqrtf NEW: ISO C 9x
4637 csqrtl NEW: ISO C 9x
4641 ctanhf NEW: ISO C 9x
4642 ctanhl NEW: ISO C 9x
4644 des_setparity NEW: Secure RPC
4645 ecb_crypt NEW: Secure RPC
4646 endutxent NEW: Unix98
4648 exp10f NEW: ISO C 9x
4649 exp10l NEW: ISO C 9x
4653 fattach NEW: STREAMS
4654 fdetach NEW: STREAMS
4658 feclearexcept NEW: ISO C 9x
4659 fegetenv NEW: ISO C 9x
4660 fegetexceptflag NEW: ISO C 9x
4661 fegetround NEW: ISO C 9x
4662 feholdexcept NEW: ISO C 9x
4664 feraiseexcept NEW: ISO C 9x
4665 ferror_locked REMOVED
4666 fesetenv NEW: ISO C 9x
4667 fesetexceptflag NEW: ISO C 9x
4668 fesetround NEW: ISO C 9x
4669 fetestexcept NEW: ISO C 9x
4670 feupdateenv NEW: ISO C 9x
4671 fflush_locked REMOVED
4675 fgets_unlocked NEW: GNU ext.
4676 fileno_locked REMOVED
4688 fputc_locked REMOVED
4689 fputs_unlocked NEW: GNU ext.
4690 fread_unlocked NEW: GNU ext.
4695 fstatvfs NEW: Unix98
4699 ftruncate64 NEW: LFS
4701 fwrite_unlocked NEW: GNU ext.
4702 gai_strerror NEW: IPv6
4706 getchar_locked REMOVED
4708 getdate_err NEW: Unix98
4709 getdate_r NEW: GNU ext.
4711 getnameinfo NEW: IPv6
4712 getnetname NEW: Secure RPC
4713 getpmsg NEW: STREAMS
4714 getpt NEW: Unix98 PTY
4715 getrlimit64 NEW: LFS
4716 getutxent NEW: Unix98
4717 getutxid NEW: Unix98
4718 getutxline NEW: Unix98
4719 glob64 NEW: GNU ext.
4720 globfree64 NEW: GNU ext.
4721 gnu_get_libc_release NEW: GNU ext.
4722 gnu_get_libc_version NEW: GNU ext.
4723 grantpt NEW: Unix98 PTY
4724 host2netname NEW: Secure RPC
4726 iconv_close NEW: iconv
4727 iconv_open NEW: iconv
4728 if_freenameindex NEW: IPv6
4729 if_indextoname NEW: IPv6
4730 if_nameindex NEW: IPv6
4731 if_nametoindex NEW: IPv6
4732 in6addr_any NEW: IPv6
4733 in6addr_loopback NEW: IPv6
4734 inet6_isipv4mapped NEW: IPv6
4735 isastream NEW: STREAMS
4736 iswblank NEW: GNU ext.
4737 key_decryptsession NEW: Secure RPC
4738 key_decryptsession_pk NEW: Secure RPC
4739 key_encryptsession NEW: Secure RPC
4740 key_encryptsession_pk NEW: Secure RPC
4741 key_gendes NEW: Secure RPC
4742 key_get_conv NEW: Secure RPC
4743 key_secretkey_is_set NEW: Secure RPC
4744 key_setnet NEW: Secure RPC
4745 key_setsecret NEW: Secure RPC
4746 llrint NEW: ISO C 9x
4747 llrintf NEW: ISO C 9x
4748 llrintl NEW: ISO C 9x
4749 llround NEW: ISO C 9x
4750 llroundf NEW: ISO C 9x
4751 llroundl NEW: ISO C 9x
4756 lrintf NEW: ISO C 9x
4757 lrintl NEW: ISO C 9x
4758 lround NEW: ISO C 9x
4759 lroundf NEW: ISO C 9x
4760 lroundl NEW: ISO C 9x
4762 makecontext NEW: Unix98
4763 mempcpy NEW: GNU ext.
4766 modify_ldt NEW: kernel
4770 nearbyint NEW: ISO C 9x
4771 nearbyintf NEW: ISO C 9x
4772 nearbyintl NEW: ISO C 9x
4773 netname2host NEW: Secure RPC
4774 netname2user NEW: Secure RPC
4775 nexttoward NEW: ISO C 9x
4776 nexttowardf NEW: ISO C 9x
4777 nexttowardl NEW: ISO C 9x
4781 passwd2des NEW: Secure RPC
4783 pow10f NEW: GNU ext.
4784 pow10l NEW: GNU ext.
4787 printf_size NEW: GNU ext.
4788 printf_size_info NEW: GNU ext.
4789 profil_counter REMOVED
4790 pthread_mutexattr_getkind_np REPLACED
4791 pthread_mutexattr_setkind_np REPLACED
4792 ptsname NEW: Unix98 PTY
4793 ptsname_r NEW: Unix98 PTY
4795 putchar_locked REMOVED
4796 putgrent NEW: GNU ext.
4798 putpmsg NEW: STREAMS
4799 pututxline NEW: Unix98
4803 readdir64_r NEW: LFS
4804 remquo NEW: ISO C 9x
4805 remquof NEW: ISO C 9x
4806 remquol NEW: ISO C 9x
4808 roundf NEW: ISO C 9x
4809 roundl NEW: ISO C 9x
4811 scalbln NEW: ISO C 9x
4812 scalblnf NEW: ISO C 9x
4813 scalblnl NEW: ISO C 9x
4815 sendfile NEW: kernel
4816 setcontext NEW: Unix98
4817 setrlimit64 NEW: LFS
4818 setutxent NEW: Unix98
4820 sigignore NEW: Unix98
4821 sigqueue NEW: POSIX.1b
4822 sigrelse NEW: Unix98
4823 sigset NEW: POSIX.1b
4824 sigtimedwait NEW: POSIX.1b
4825 sigwaitinfo NEW: POSIX.1b
4826 sincos NEW: GNU ext.
4827 sincosf NEW: GNU ext.
4828 sincosl NEW: GNU ext.
4832 strcasestr NEW: GNU ext.
4833 strtoimax NEW: ISO C 9x
4834 strtoumax NEW: ISO C 9x
4835 strverscmp NEW: GNU ext.
4836 svcauthdes_stats NEW: Secure RPC
4837 svcunix_create NEW: sunrpc etx
4838 svcunixfd_create NEW: sunrpc ext
4839 swapcontext NEW: Unix98
4840 tcgetsid NEW: Unix98 PTY
4841 tdestroy NEW: GNU ext.
4842 tgamma NEW: ISO C 9x
4843 tgammaf NEW: ISO C 9x
4844 tgammal NEW: ISO C 9x
4848 truncf NEW: ISO C 9x
4849 truncl NEW: ISO C 9x
4851 unlockpt NEW: Unix98 PTY
4852 updwtmpx NEW: Unix98
4853 user2netname NEW: Secure RPC
4854 utmpxname NEW: Unix98
4855 versionsort NEW: GNU ext.
4856 versionsort64 NEW: GNU ext.
4858 wcscasecmp NEW: GNU ext.
4859 wcsncasecmp NEW: GNU ext.
4860 wcsnlen NEW: GNU ext.
4861 wcstoimax NEW: ISO C 9x
4862 wcstoll NEW: ISO C 9x
4863 wcstoull NEW: ISO C 9x
4864 wcstoumax NEW: ISO C 9x
4866 wordexp NEW: POSIX.2
4867 wordfree NEW: POSIX.2
4868 write_profiling REMOVED
4869 xdecrypt NEW: Secure RPC
4870 xdr_authdes_cred NEW: Secure RPC
4871 xdr_authdes_verf NEW: Secure RPC
4872 xdr_cryptkeyarg NEW: Secure RPC
4873 xdr_cryptkeyarg2 NEW: Secure RPC
4874 xdr_cryptkeyres NEW: Secure RPC
4875 xdr_getcredres NEW: Secure RPC
4876 xdr_key_netstarg NEW: Secure RPC
4877 xdr_key_netstres NEW: Secure RPC
4878 xdr_keybuf NEW: Secure RPC
4879 xdr_keystatus NEW: Secure RPC
4880 xdr_netnamestr NEW: Secure RPC
4881 xdr_sizeof NEW: Secure RPC
4882 xdr_unixcred NEW: sunrpc ext
4883 xencrypt NEW: Secure RPC
4884 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4895 * inet_ntoa is thread-safe
4897 * updwtmp is moved from libutil to libc
4899 * rewrite of cbrt function
4901 * update of timezone data
4915 * add atoll function
4917 * fix complex problems in Berkeley DB code
4919 * fix math functions
4923 * fixed lots of header problems (especially Linux/GNU specific)
4925 * dynamic loader preserves all registers
4927 * Roland McGrath provided support for handling of auxiliary objects in
4928 the ELF dynamic loader.
4930 * support for parallel builds is improved
4934 * GNU extensions are no longer declared by default. To enable them you
4935 must define the macro `_GNU_SOURCE' in your program or compile with
4938 * The library has changed from using GNU ld symbol aliases to using weak
4939 symbols where available. The ELF object file format supports weak
4940 symbols; GNU ld also supports weak symbols in the a.out format. (There
4941 is also now support for other GNU ld extensions in ELF. Use the
4942 `--with-elf' option to configure to indicate you have ELF, and
4943 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4944 of many files which contained only symbol aliases, reducing the size of
4945 the source and the compiled library; many other files were renamed to
4946 less cryptic names previously occupied by the symbol alias files.
4947 There is a new header file <elf.h> for programs which operate on
4948 files in the ELF format.
4950 * Converted to Autoconf version 2, so `configure' has more options.
4951 Run `configure --help' to see the details.
4953 * The library can now be configured to build profiling, highly-optimized
4954 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4955 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4956 `configure' enable building these extra libraries. The shared library is
4957 built by default when using both ELF and GNU ld. When shared libraries
4958 are enabled, the new library `-ldl' is available for arbitrary run-time
4959 loading of shared objects; its interface is defined in <dlfcn.h>. The
4960 new header file <link.h> gives access to the internals of the run-time
4961 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4962 application of same name on other systems and it provides information
4963 about dynamically linked binaries.
4965 * The C library now provides the run-time support code for profiling
4966 executables compiled with `-pg'. Programs can control the profiling code
4967 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4968 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4969 the support for this file format was contributed by David Mosberger-Tang.
4971 * The math code has been replaced with a math library based on fdlibm from
4972 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4973 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
4974 functions. The math functions now reside in a separate library, so
4975 programs using them will need to use `-lm' their linking commands.
4977 * John C. Bowman contributed optimized ix87 assembler inline functions.
4979 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
4980 mechanism similar to that found in Solaris 2. This is now used for the
4981 group, passwd, hosts, networks, services, protocols, rpc, ethers,
4982 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
4983 file controls what services are used for each individual database. This
4984 works by loading shared libraries with names specified in `nsswitch.conf',
4985 so service modules can be changed or added at any time without even
4986 relinking any program. Currently there are the file, db, and NIS based
4987 NSS services available.
4989 * The new functions `strtoq' and `strtouq' parse integer values from
4990 strings, like `strtol' and `strtoul', but they return `long long int' and
4991 `unsigned long long int' values, respectively (64-bit quantities).
4993 * The new functions `strtof' and `strtold' parse floating-point values from
4994 strings, like `strtod', but they return `float' and `long double' values,
4995 respectively (on some machines `double' and `long double' are the same).
4997 * Ulrich Drepper has contributed new implementations of the floating-point
4998 printing and reading code used in the `printf' family of functions and
4999 `strtod', `strtof', and `strtold'. These new functions are perfectly
5000 accurate, and much faster than the old ones.
5002 * The implementation of the POSIX locale model was completely rewritten by
5003 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5004 to compile the POSIX locale definition.
5006 * The former dummy implementations of the strcoll and strxfrm function are
5007 now replaced by fully functional code contributed by Ulrich Drepper. The
5008 collation information comes from the POSIX locale definitions.
5010 * The new header <langinfo.h> defines an interface for accessing
5011 various locale-dependent data (using the locale chosen with `setlocale').
5013 * Ulrich Drepper has contributed a new suite of functions for operation on
5014 wide-character and multibyte-character strings, in <wchar.h>;
5015 and classification and case conversion of wide characters, in <wctype.h>.
5016 These new functions are conforming to the ISO C, Amendement 1 specification.
5018 * There is now a second implementation of the standard I/O library available.
5019 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5020 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5022 * You can now use positional parameter specifications in format strings
5023 for the `printf' and `scanf' families of functions. For example,
5024 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5025 ``Number 6, Mr Jones''. This is mainly useful when providing different
5026 format strings for different languages, whose grammars may dictate
5027 different orderings of the values being printed. To support this
5028 feature, the interface for `register_printf_handler' has changed; see
5029 the header file <printf.h> for details.
5031 * The `printf' and `scanf' families of functions now understand a new
5032 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5033 to group numbers as indicated by the locale; for `scanf' and friends, this
5034 says to accept as valid only a number with all the proper grouping
5035 separators in the right places. In the default "C" locale, numbers are
5036 not grouped; but locales for specific countries will define the usual
5037 conventions (i.e. separate thousands with `,' in the US locale).
5039 * The pgrp functions have been regularized, slightly incompatibly but much
5040 less confusingly. The core functions are now `getpgid' and `setpgid',
5041 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5042 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5043 provided for compatibility. There is no longer an incompatible `getpgrp'
5044 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5046 * The new header file <fts.h> and suite of functions simplify programs that
5047 operate on directory trees. This code comes from 4.4 BSD.
5049 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5050 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5051 NSS scheme used in glibc.
5053 * There is a new malloc debugging hook `__memalign_hook'.
5055 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5056 `unsigned int' in <sys/types.h>. These are for compatibility only and
5057 their use is discouraged.
5059 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5060 done differently, so that it works even without GNU ld.
5062 * New function `euidaccess' checks allowed access to a file like `access',
5063 but using the effective IDs instead of the real IDs.
5065 * The time zone data files have been updated for the latest and greatest
5066 local time conventions of the countries of the world.
5068 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5071 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5072 for formatting floating-point numbers. They are provided only for
5073 compatibility; new programs should use `sprintf' instead. There are
5074 also equivalent function for the `long double' floating-point type and
5075 all functions also exist in a reentrant form.
5077 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5078 functions for maintaining the login-record files (primarily of use to
5079 system programs such as `login'), and convenient functions for
5080 allocating and initializing a pseudo-terminal (pty) device.
5082 * Ulrich Drepper has contributed new support for System V style
5083 shared memory and IPC on systems that support it.
5085 * Ulrich Drepper has contributed several miscellaneous new functions found
5086 in System V: The `hsearch' family of functions provide an effective
5087 implementation of hash tables; `a64l' and `l64a' provide a very simple
5088 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5091 * Ulrich Drepper has contributed new reentrant counterparts for the
5092 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5094 * Ulrich Drepper has contributed new, highly-optimized versions of several
5095 string functions for the i486/Pentium family of processors.
5097 * Ulrich Drepper has updated the Linux-specific code, based largely
5098 on work done in Hongjiu Lu's version of GNU libc for Linux.
5099 The GNU library now supports Linux versions 2.0.10 and later,
5100 using the ELF object file format (i[3456]86-*-linux).
5102 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5104 * David Mosberger-Tang and Richard Henderson have ported the C library
5105 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5106 dynamic linking support for ELF/Alpha.
5108 * Richard Henderson contributed several Alpha optimized assembler function
5109 for arithmetic and string handling.
5111 * Ulrich Drepper has contributed a new set of message catalog functions to
5112 support multiple languages using the <libintl.h> interface, for use with
5113 his new package GNU gettext. Translation volunteers have contributed
5114 catalogs of the library's messages in Spanish, German, and Korean.
5116 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5117 program and the `catgets' function for reading the catalog files it
5118 creates. (The <libintl.h> interface is preferred; we include the
5119 <nl_types.h> interface using `catgets' only for source compatibility with
5120 programs already written to use it.)
5122 * New header file <values.h> gives SVID-compatible names for <limits.h>
5125 * Various new macros, declarations, and small header files for compatibility
5128 * New function `group_member' is a convenient way to check if a process has
5129 a given effective group ID.
5131 * When using GCC 2.7 and later, the socket functions are now declared in a
5132 special way so that passing an argument of type `struct sockaddr_in *',
5133 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5134 `struct sockaddr *' type, does not generate a type-clash warning.
5136 * New function `error' declared in header file <error.h> is a convenient
5137 function for printing error messages and optionally exiting; this is the
5138 canonical function used in GNU programs. The new functions `err', `warn',
5139 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5140 doing the same thing.
5142 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5143 POSIX.2 `glob' function to do ~ and {...} expansion.
5145 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5146 `clearenv' which is used in POSIX.9 is also available.
5148 * New function `getsid' returns session ID number on systems that support it.
5150 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5151 files <db.h> and <mpool.h> provide a rich set of functions for several
5152 types of simple databases stored in memory and in files, and <ndbm.h> is
5153 an old `ndbm'-compatible interface using the `db' functions. Link with
5154 `-ldb' to get these functions.
5156 * New macro `strdupa' copies a string like `strdup', but uses local stack
5157 space from `alloca' instead of dynamic heap space from `malloc'.
5159 * New function `strnlen' is like `strlen' but searches only a given maximum
5160 number of characters for the null terminator. `stpncpy', `strndup' and
5161 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5164 * New function `statfs' in header <sys/statfs.h>.
5166 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5167 provide convenient functions for operating on blocks of null-terminated
5170 * A new suite of functions in <utmp.h> handle all the details of reading
5171 and writing the utmp file.
5173 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5176 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5177 completely POSIX compliant and also implemented the extended functionality
5178 to handle alternate digit representation and alternate era date formats.
5180 * Ulrich Drepper provided an implementation of the `strptime' function
5181 defined in XPG4.2 which transforms a string into a `struct tm' value.
5183 * Paul Eggert provided the tzselect shell script as part of the timezone
5184 code. The shell script makes it easy to select the correct timezone
5187 * The implementation of the malloc family of functions is completely replaced
5188 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5189 The implementation uses the mmap function (if available) and it is
5190 optimized for the use in multi threaded programs.
5192 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5193 functions. This new functionality is usable by specifying a special
5194 salt string and it is compatible with implementation on *BSD systems.
5196 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5197 `getsubopt' to handle second level command line options, `bsd_signal'
5198 to access BSD style `signal' functionality, the obsolete `regexp' style
5201 * the `lchown' function is available on system which support this
5204 * The implementation of the shadow password handling function was contributed
5207 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5209 * POSIX.1g support was added. The <sys/select.h> header is available,
5210 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5211 implementation of `getaddrinfo'.
5215 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5217 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5218 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5220 * The new function `daemon' from 4.4 BSD is useful for server programs that
5221 want to put themselves in the background.
5223 * Joel Sherrill has contributed support for several standalone boards that
5224 run without an operating system.
5226 * `printf', `scanf' and friends now accept a `q' type modifier for long
5227 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5229 * All of the code taken from BSD (notably most of the math and networking
5230 routines) has been updated from the BSD 4.4-Lite release.
5232 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5234 * The new functions `getdomainname' and `setdomainname' fetch or change the
5235 YP/NIS domain name. These are system calls which exist on systems which
5238 * The time zone data files have been updated for the latest international
5241 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5242 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5246 * The C library now includes support for Sun RPC, from Sun's free
5247 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5248 are included. (There is still no support for YP.)
5250 * Tom Quinn has contributed a port of the C library to SGI machines running
5251 Irix 4 (mips-sgi-irix4).
5253 * The new `lockf' function is a simplified interface to the locking
5254 facilities of `fcntl', included for compatibility.
5256 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5258 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5260 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5263 * The error message printed by `assert' for a failed assertion now includes
5264 the name of the program (if using GNU ld) and the name of the calling
5265 function (with versions of GCC that support this).
5267 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5269 * The library now includes the <sys/mman.h> header file and memory
5270 management functions `mmap', `munmap', `mprotect', `msync', and
5271 `madvise', on systems that support those facilities.
5273 * The interface for `mcheck' has changed slightly: the function called to
5274 abort the program when an allocation inconsistency is detected now takes
5275 an argument that indicates the type of failure. The new function
5276 `mprobe' lets you request a consistency check for a particular block at
5277 any time (checks are normally done only when you call `free' or `realloc'
5280 * It is now possible to easily cross-compile the C library, building on one
5281 system a library to run on another machine and/or operating system. All
5282 you need to do is set the variable `HOST_CC' in `configparms' to the
5283 native compiler for programs to run on the machine you are building on (a
5284 few generator programs are used on Unix systems); set `CC' to the
5287 * The new function `fexecve' (only implemented on the GNU system) executes
5288 a program file given a file descriptor already open on the file.
5292 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5293 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5295 * You can set the variable `libprefix' in `configparms' to specify a prefix
5296 to be prepended to installed library files; this makes it easy to install
5297 the GNU C library to be linked as `-lgnuc' or whatever.
5299 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5300 copies a limited number of characters from a string, and returns the
5301 address of the last character written.
5303 * You no longer need to check for whether the installed `stddef.h' is
5304 compatible with the GNU C library. configure now checks for you.
5306 * You can now define a per-stream `fileno' function to convert the
5307 stream's cookie into an integral file descriptor.
5309 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5310 allocates zero bytes of storage, and returns a unique pointer which
5311 you can pass to `realloc' or `free'. The behavior is undefined if
5312 you dereference this pointer.
5314 * The C library now runs on Sony NEWS m68k machines running either
5315 NewsOS 3 or NewsOS 4.
5317 * The new `syscall' function is a system-dependent primitive function
5318 for invoking system calls. It has the canonical behavior on Unix
5319 systems, including unreliable return values for some calls (such as
5320 `pipe', `fork' and `getppid').
5322 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5323 to `EAGAIN', which is the preferred name. On systems whose kernels
5324 use two distinct codes, the C library now translates EWOULDBLOCK to
5325 EAGAIN in every system call function.
5329 * The GNU C Library Reference Manual is now distributed with the library.
5330 `make dvi' will produce a DVI file of the printed manual.
5331 `make info' will produce Info files that you can read on line using C-h i
5332 in Emacs or the `info' program.
5333 Please send comments on the manual to bug-glibc-manual@gnu.org.
5335 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5337 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5339 * Jason Merrill has contributed a port to the Sequent Symmetry running
5340 Dynix version 3 (i386-sequent-dynix).
5342 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5343 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5345 * New function `memory_warnings' lets you arrange to get warnings when
5346 malloc is running out of memory to allocate, like Emacs gives you.
5348 * The C library now contains the relocating allocator used in Emacs 19 for
5349 its editing buffers. This allocator (ralloc) minimizes allocation
5350 overhead and fragmentation by moving allocated regions around whenever it
5351 needs to. You always refer to a ralloc'd region with a "handle" (a
5352 pointer to a pointer--an object of type `void **').
5354 * There is a new `printf' format: `%m' gives you the string corresponding
5355 to the error code in `errno'.
5357 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5358 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5359 pass, the `a' modifier says to fill in a `char **' you pass with a
5362 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5363 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5364 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5366 * `mkstemp' is a traditional Unix function to atomically create and open a
5367 uniquely-named temporary file.
5371 * The standard location for the file that says what the local timezone is
5372 has changed again. It is now `/usr/local/etc/localtime' (or more
5373 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5375 * The distribution no longer contains any files with names longer than 14
5378 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5379 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5381 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5385 * The configuration process has changed quite a bit. The `configure'
5386 script is now used just like the configuration scripts for other GNU
5387 packages. The `sysdeps' directory hierarchy is much rearranged.
5388 The file `INSTALL' explains the new scheme in detail.
5390 * The header files no longer need to be processed into ANSI C and
5391 traditional C versions. There is just one set of files to install, and
5392 it will work with ANSI or old C compilers (including `gcc -traditional').
5394 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5395 MIPS DECStation running Ultrix 4.
5397 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5398 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5399 made itself into a shared library.
5401 * Yet further improved support for the i386, running 4.3 BSD-like systems
5402 (such as Mach 3 with the Unix single-server), or System V.
5404 * New function `strncasecmp' to do case-insensitive string comparison
5405 with limited length.
5407 * New function `strsep' is a reentrant alternative to `strtok'.
5409 * New functions `scandir' and `alphasort' for searching directories.
5411 * New function `setenv' is a better interface to `putenv'.
5413 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5414 function for traversing a directory tree.
5416 * The GNU obstack package is now also part of the C library.
5417 The new function `open_obstack_stream' creates a stdio stream that
5418 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5419 formatted output directly to an obstack.
5421 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5422 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5424 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5426 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5427 things to your strings.
5429 * There are some new test programs: test-fseek, testmb, and testrand.
5431 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5432 These ports are not finished, but are a good starting place for really
5433 supporting those systems.
5435 * `/etc/localtime' is now the standard location for the file that says what
5436 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5437 This follows the general principle that `/etc' is the place for all local
5438 configuration files.
5440 * The C library header files now use `extern "C"' when used by the C++
5441 compiler, so the C library should now work with C++ code.
5443 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5444 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5447 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5448 function which uses the `merge sort' algorithm, and is said to be
5449 significantly faster than the old GNU `qsort' function. Merge sort is
5450 now the standard `qsort' function. The new algorithm can require a lot
5451 of temporary storage; so, the old sorting function is called when the
5452 required storage is not available.
5454 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5455 provides the Unix `crypt' function, plus some other entry points.
5457 * The code and header files taken from 4.4 BSD have been updated with the
5458 latest files released from Berkeley.
5460 ----------------------------------------------------------------------
5461 Copyright information:
5463 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5465 Permission is granted to anyone to make or distribute verbatim copies
5466 of this document as received, in any medium, provided that the
5467 copyright notice and this permission notice are preserved,
5468 thus giving the recipient permission to redistribute in turn.
5470 Permission is granted to distribute modified versions
5471 of this document, or of portions of it,
5472 under the above conditions, provided also that they
5473 carry prominent notices stating who last changed them.
5476 version-control: never