1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2019 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * The entry for the new Japanese era has been added for ja_JP locale.
14 Deprecated and removed features, and other changes affecting compatibility:
16 * The copy_file_range function fails with ENOSYS if the kernel does not
17 support the system call of the same name. Previously, user space
18 emulation was performed, but its behavior did not match the kernel
19 behavior, which was deemed too confusing. Applications which use the
20 copy_file_range function will have to be run on kernels which implement
21 the copy_file_range system call. Support for most architectures was added
22 in version 4.5 of the mainline Linux kernel.
24 The following bugs are resolved with this release:
26 [16573] malloc: Set and reset all hooks for tracing
28 [20568] Fix crash in _IO_wfile_sync
29 [24155] x32 memcmp can treat positive length as 0 (if sign bit in RDX is set) (CVE-2019-7309)
30 [24164] Systemtap probes need to use "nr" constraint on 32-bit Arm
31 [24161] __run_fork_handlers self-deadlocks in malloc/tst-mallocfork2
32 [24211] Use-after-free in Systemtap probe in pthread_join
33 [24228] old x86 applications that use legacy libio crash on exit
34 [24476] dlfcn: Guard __dlerror_main_freeres with __libc_once_get (once)
35 [24744] io: Remove the copy_file_range emulation
36 [24986] alpha: new getegid, geteuid and getppid syscalls used
38 [25203] libio: Disable vtable validation for pre-2.1 interposed handles
39 [25204] Ignore LD_PREFER_MAP_32BIT_EXEC for SUID programs
40 [25225] ld.so fails to link on x86 if GCC defaults to -fcf-protection
41 [25232] No const correctness for strchr et al. for Clang++
43 Security related changes:
45 CVE-2019-7309: x86-64 memcmp used signed Jcc instructions to check
46 size. For x86-64, memcmp on an object size larger than SSIZE_MAX
47 has undefined behavior. On x32, the size_t argument may be passed
48 in the lower 32 bits of the 64-bit RDX register with non-zero upper
49 32 bits. When it happened with the sign bit of RDX register set,
50 memcmp gave the wrong result since it treated the size argument as
51 zero. Reported by H.J. Lu.
53 CVE-2019-9169: Attempted case-insensitive regular-expression match
54 via proceed_next_node in posix/regexec.c leads to heap-based buffer
55 over-read. Reported by Hongxu Chen.
57 CVE-2019-19126: ld.so failed to ignore the LD_PREFER_MAP_32BIT_EXEC
58 environment variable during program execution after a security
59 transition, allowing local attackers to restrict the possible mapping
60 addresses for loaded libraries and thus bypass ASLR for a setuid
61 program. Reported by Marcin KoĆcielnicki.
68 * The getcpu wrapper function has been added, which returns the currently
69 used CPU and NUMA node. This function is Linux-specific.
71 * A new convenience target has been added for distribution maintainers
72 to build and install all locales as directories with files. The new
73 target is run by issuing the following command in your build tree:
74 'make localedata/install-locale-files', with an optional DESTDIR
75 to set the install root if you wish to install into a non-default
78 * Optimized generic exp, exp2, log, log2, pow, sinf, cosf, sincosf and tanf.
80 * The reallocarray function is now declared under _DEFAULT_SOURCE, not just
81 for _GNU_SOURCE, to match BSD environments.
83 * For powercp64le ABI, Transactional Lock Elision is now enabled iff kernel
84 indicates that it will abort the transaction prior to entering the kernel
85 (PPC_FEATURE2_HTM_NOSC on hwcap2). On older kernels the transaction is
86 suspended, and this caused some undefined side-effects issues by aborting
87 transactions manually. Glibc avoided it by abort transactions manually on
88 each syscall, but it lead to performance issues on newer kernels where the
89 HTM state is saved and restore lazily (the state being saved even when the
90 process actually does not use HTM).
92 * The functions posix_spawn_file_actions_addchdir_np and
93 posix_spawn_file_actions_addfchdir_np have been added, enabling
94 posix_spawn and posix_spawnp to run the new process in a different
95 directory. These functions are GNU extensions. The function
96 posix_spawn_file_actions_addchdir_np is similar to the Solaris function
99 * The popen and system do not run atfork handlers anymore (BZ#17490).
100 Although it is a possible POSIX violation, the POSIX rationale in
101 pthread_atfork documentation regarding atfork handlers is to handle
102 inconsistent mutex state after a fork call in a multi-threaded process.
103 In both popen and system there is no direct access to user-defined mutexes.
105 * Support for the C-SKY ABIV2 running on Linux has been added. This port
106 requires at least binutils-2.32, gcc-9.0, and linux-4.20. Two ABIs are
108 - C-SKY ABIV2 soft-float little-endian
109 - C-SKY ABIV2 hard-float little-endian
111 * strftime's default formatting of a locale's alternative year (%Ey)
112 has been changed to zero-pad the year to a minimum of two digits,
113 like "%y". This improves the display of Japanese era years during
114 the first nine years of a new era, and is expected to be harmless
115 for all other locales (only Japanese locales regularly have
116 alternative year numbers less than 10). Zero-padding can be
117 overridden with the '_' or '-' flags (which are GNU extensions).
119 * As a GNU extension, the '_' and '-' flags can now be applied to
120 "%EY" to control how the year number is formatted; they have the
121 same effect that they would on "%Ey".
123 Deprecated and removed features, and other changes affecting compatibility:
125 * The glibc.tune tunable namespace has been renamed to glibc.cpu and the
126 tunable glibc.tune.cpu has been renamed to glibc.cpu.name.
128 * The type of the pr_uid and pr_gid members of struct elf_prpsinfo, defined
129 in <sys/procfs.h>, has been corrected to match the type actually used by
130 the Linux kernel. This affects the size and layout of that structure on
131 MicroBlaze, MIPS (n64 ABI only), Nios II and RISC-V.
133 * For the MIPS n32 ABI, the type of the pr_sigpend and pr_sighold members of
134 struct elf_prstatus, and the pr_flag member of struct elf_prpsinfo,
135 defined in <sys/procfs.h>, has been corrected to match the type actually
136 used by the Linux kernel. This affects the size and layout of those
139 * An archaic GNU extension to scanf, under which '%as', '%aS', and '%a[...]'
140 meant to scan a string and allocate space for it with malloc, is now
141 restricted to programs compiled in C89 or C++98 mode with _GNU_SOURCE
142 defined. This extension conflicts with C99's use of '%a' to scan a
143 hexadecimal floating-point number, which is now available to programs
144 compiled as C99 or C++11 or higher, regardless of _GNU_SOURCE.
146 POSIX.1-2008 includes the feature of allocating a buffer for string input
147 with malloc, using the modifier letter 'm' instead. Programs using
148 '%as', '%aS', or '%a[...]' with the old GNU meaning should change to
149 '%ms', '%mS', or '%m[...]' respectively. Programs that wish to use the
150 C99 '%a' no longer need to avoid _GNU_SOURCE.
152 GCC's -Wformat warnings can detect most uses of this extension, as long
153 as all functions that call vscanf, vfscanf, or vsscanf are annotated with
154 __attribute__ ((format (scanf, ...))).
156 Changes to build and runtime requirements:
158 * Python 3.4 or later is required to build the GNU C Library.
160 * On most architectures, GCC 5 or later is required to build the GNU C
161 Library. (On powerpc64le, GCC 6.2 or later is still required, as before.)
163 Older GCC versions and non-GNU compilers are still supported when
164 compiling programs that use the GNU C Library.
166 Security related changes:
168 CVE-2018-19591: A file descriptor leak in if_nametoindex can lead to a
169 denial of service due to resource exhaustion when processing getaddrinfo
170 calls with crafted host names. Reported by Guido Vranken.
172 CVE-2019-6488: On x32, the size_t parameter may be passed in the lower
173 32 bits of a 64-bit register with with non-zero upper 32 bit. When it
174 happened, accessing the 32-bit size_t value as the full 64-bit register
175 in the assembly string/memory functions would cause a buffer overflow.
178 CVE-2016-10739: The getaddrinfo function could successfully parse IPv4
179 addresses with arbitrary trailing characters, potentially leading to data
180 or command injection issues in applications.
182 The following bugs are resolved with this release:
184 [10425] localedata: it_IT/it_CH: LC_TIME format is wrong
185 [10496] localedata: 12h time representation in multiple locales faulty
186 [10797] localedata: it_IT locale numeric does not have a separator for
188 [11319] libc: dprintf doesn't handle errors properly
189 [16346] time: mktime: potentially unsafe use of localtime_offset
190 [17248] build: glibc should not sort CFLAGS (support gcc plugins and
192 [17405] libc: Implement posix_spawn_file_actions_addchdir_np,
193 posix_spawn_file_actions_addfchdir_np
194 [17426] localedata: Indian locales: set the correct date format
195 [17490] stdio: popen should not invoke atfork handlers
196 [17783] libc: TIOCSER_TEMT conditions inconsistent
197 [18040] regex: use-after-free in regexec/get_subexp
198 [18093] libc: Corrupted aux-cache causes ldconfig to segfault
199 [20018] network: getaddrinfo should reject IP addresses with trailing
200 characters (CVE-2016-10739)
201 [20209] localedata: Spelling mistake for Sunday in Greenlandic kl_GL
202 [20271] libc: Missing "\n" in __libc_fatal calls
203 [20480] dynamic-link: Patch: ifunc not executable, crashes sudo qemu
204 [20544] libc: RFE: atexit, __cxa_atexit, on_exit should assert function
205 pointer argument is non-NULL
206 [21037] stdio: open_memstream and freopen
207 [21286] libc: bits/siginfo.h is missing enum definition for TRAP_HWBKPT
208 [21716] time: Crash in glibc's mktime in low-memory situations
209 [22834] stdio: Subprocess forked by popen may crash in Linux when
210 multithreads call popen
211 [22927] network: crash in vn_gai_enqueue_request if requests_tail was NULL
212 and pthread_create fails.
213 [23032] hurd: sysdeps/htl/pt-barrier-init.c:39: bad call to memcmp ?
214 [23125] libc: riscv64: endless loop when throwing an exception from a
216 [23275] nptl: Race in pthread_mutex_lock while promoting to
217 PTHREAD_MUTEX_ELISION_NP.
218 [23400] libc: stdlib/test-bz22786.c creates temporary files in glibc
220 [23479] math: [mips] bits/fenv.h should not define some macros for soft-
222 [23490] libc: sysdeps/unix/sysv/linux/x86/tst-cet-property-2.c:49: off by
224 [23497] libc: readdir64@GLIBC_2.1 cannot parse the kernel directory stream
225 [23509] dynamic-link: CET enabled glibc is incompatible with the older
227 [23520] nscd: nscd: Use-after-free in addgetnetgrentX and its callers
228 [23521] nss: get_next_alias nss_files file stream leak
229 [23538] nptl: Hang in pthread_cond_broadcast
230 [23562] libc: Wrong type for si_band in Linux-specific siginfo_t
231 [23578] regex: Invalid memory access if regex pattern contains NUL byte
232 [23579] libc: Errors misreported in preadv2
233 [23597] build: support/test-container.c doesn't work with different
235 [23603] time: mktime signed integer overflow on large timestamps
236 [23606] libc: Missing ENDBR32 in sysdeps/i386/start.S
237 [23614] libc: powerpc: missing CFI register information in __mpn_*
239 [23637] string: Generic strstr/strcasestr fails with huge needles
240 [23640] libc: no way to easily clear FD_CLOEXEC in
241 posix_spawn_file_actions_adddup2()
242 [23649] libc: [microblaze/mips/nios2/riscv] sys/procfs.h pr_uid, pr_gid
244 [23656] libc: [mips n32] sys/procfs.h pr_sigpend, pr_sighold, pr_flag have
246 [23679] libc: gethostid: Missing NULL check for gethostbyname_r result
247 [23689] libc: Bug in documentation for rusage.ru_ixrss in
248 bits/types/struct_rusage.h
249 [23690] dynamic-link: Segfault in _dl_profile_fixup with a high number of
251 [23707] dynamic-link: Missing unwind info in sysdeps/powerpc/powerpc32/dl-
253 [23709] string: glibc 2.25 lacks sse2 optimized strstr()
254 [23716] dynamic-link: _dl_runtime_resolve_shstk isn't selected properly
255 [23717] libc: glibc: stdlib/tst-setcontext9 test suite failure on
257 [23724] localedata: Albanian date formats are incorrect
258 [23735] math: libnldbl_nonshared.a references internal libm symbols
259 [23740] localedata: kl_GL: Month names and date formats need update
260 [23744] regex: regex refactorings to remove BE, avoid duplication
261 [23745] time: mktime fix for Gnulib + coreutils
262 [23758] time: Improve the width of alternate representation for year in
264 [23783] libc: [mips] Missing CMSPAR bits/termios.h
265 [23789] time: mktime does not set errno on failure
266 [23791] localedata: Wrong monetary format for ca_ES locale
267 [23793] locale: c32rtomb and mbrtoc32 should not alias wcrtomb and mbrtowc
268 [23794] locale: c16rtomb does not handle surrogate pairs
269 [23821] libc: si_band in siginfo_t has wrong type long int on sparc64
270 [23822] math: ia64 static libm.a is missing exp2f, log2f and powf symbols
271 [23836] time: time/tst-mktime2 test failure on Arm (32-bit)
272 [23848] libc: [sparc] Some socket syscalls wrongly assumed to be present
273 [23861] nptl: rdlock stalls indefinitely on an unlocked pthread rwlock
274 [23862] libc: [sh] missing kernel-features.h undefines
275 [23864] libc: [riscv] missing kernel-features.h undefines
276 [23867] libc: [arm/microblaze] __ASSUME_MLOCK2 incorrect
277 [23907] malloc: Incorrect double-free malloc tcache check disregards
279 [23913] libc: off-by-one in function maybe_script_execute in
280 sysdeps/posix/spawni.c
281 [23915] libc: [arm] __ASSUME_COPY_FILE_RANGE incorrect
282 [23923] locale: Add --no-hard-links option to localedef
283 [23927] network: Linux if_nametoindex() does not close descriptor
285 [23961] math: powf can overflow to inf without setting errno in non-
286 nearest rounding mode
287 [23967] libc: [2.28 Regression]: New sigaction implementation breaks m68k
288 [23972] libc: __old_getdents64 uses wrong d_off value on overflow
289 [23993] libc: glibc 2.29 doesn't build with gcc 4.9
290 [23995] localedata: Remove execution flags from localedata/locales/bi_VU
291 [24011] localedata: Fixed small type in comment for locale bs_BA
292 [24018] libc: gettext() may return NULL
293 [24022] build: riscv build failure with Linux kernel 4.20-rc7
294 [24023] build: [2.29 Regression] FAIL: elf/check-localplt
295 [24024] string: strerror() might set errno to ENOMEM due to -fno-math-
297 [24027] malloc: glibc: realloc() ncopies 32-bit integer overflow
298 [24034] libc: tst-cancel21-static fails with SIGBUS on pre-ARMv7 when
300 [24046] localedata: en_US locale doesn't define date_fmt
301 [24063] manual: @var{errno} should be @code{errno}
302 [24066] soft-fp: Inconsistent _FP_W_TYPE_SIZE check
303 [24088] libc: VSCR field is not being correctly read in ucontext_t on
305 [24096] time: Specifying '_' or '-' flag for "%EY" does not produce the
307 [24097] string: Can't use 64-bit register for size_t in assembly codes for
309 [24110] hurd: SS_DISABLE never set in stack_t value returned by
311 [24112] network: Do not send DNS queries for non-host names (where all
312 answers will be rejected)
313 [24130] libc: alpha __remqu corrupts $f3 register
320 * The localization data for ISO 14651 is updated to match the 2016
321 Edition 4 release of the standard, this matches data provided by
322 Unicode 9.0.0. This update introduces significant improvements to the
323 collation of Unicode characters. This release deviates slightly from
324 the standard in that the collation element ordering for lowercase and
325 uppercase LATIN script characters is adjusted to ensure that regular
326 expressions with ranges like [a-z] and [A-Z] don't interleave e.g. A
327 is not matched by [a-z]. With the update many locales have been
328 updated to take advantage of the new collation information. The new
329 collation information has increased the size of the compiled locale
330 archive or binary locales.
332 * The GNU C Library can now be compiled with support for Intel CET, AKA
333 Intel Control-flow Enforcement Technology. When the library is built
334 with --enable-cet, the resulting glibc is protected with indirect
335 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
336 compatible with all existing executables and shared libraries. This
337 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
338 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
339 capable of multi-byte NOPs, like x86-64 processors as well as Intel
340 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
341 x86_64 and x32 on non-CET processors. --enable-cet has been tested
342 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
345 * The GNU C Library now has correct support for ABSOLUTE symbols
346 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
347 relocated incorrectly or in some cases discarded. The GNU linker can
348 make use of the newer semantics, but it must communicate it to the
349 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
350 field) to indicate such support is required.
352 * Unicode 11.0.0 Support: Character encoding, character type info, and
353 transliteration tables are all updated to Unicode 11.0.0, using
354 generator scripts contributed by Mike FABIAN (Red Hat).
356 * <math.h> functions that round their results to a narrower type are added
357 from TS 18661-1:2014 and TS 18661-3:2015:
359 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
362 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
365 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
368 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
371 * Two grammatical forms of month names are now supported for the following
372 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
373 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
374 support two grammatical forms in abbreviated month names: Catalan, Greek,
377 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
378 include the support for two grammatical forms of month names.
380 * Building and running on GNU/Hurd systems now works without out-of-tree
383 * The renameat2 function has been added, a variant of the renameat function
384 which has a flags argument. If the flags are zero, the renameat2 function
385 acts like renameat. If the flag is not zero and there is no kernel
386 support for renameat2, the function will fail with an errno value of
387 EINVAL. This is different from the existing gnulib function renameatu,
388 which performs a plain rename operation in case of a RENAME_NOREPLACE
389 flags and a non-existing destination (and therefore has a race condition
390 that can clobber the destination inadvertently).
392 * The statx function has been added, a variant of the fstatat64
393 function with an additional flags argument. If there is no direct
394 kernel support for statx, glibc provides basic stat support based on
395 the fstatat64 function.
397 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
398 library if installed. libidn2 version 2.0.5 or later is recommended. If
399 libidn2 is not available, internationalized domain names are not encoded
400 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
401 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
402 with an encoding error.) Flags which used to change the IDN encoding and
403 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
404 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
405 deprecated. They no longer have any effect.
407 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
408 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
409 range of ELF gABI expressions including such constructs as
410 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
411 have been further restricted, and where in the past a dynamic string
412 token sequence may have been interpreted as a literal string it will
413 now cause a load failure. These load failures were always considered
414 unspecified behaviour from the perspective of the dynamic loader, and
415 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
416 results in a load failure now.
418 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
419 implementation includes all the standard functions provided by
422 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
423 thrd_detach, thrd_exit, and thrd_join for thread management.
425 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
426 mtx_destroy for mutual exclusion.
428 - call_once for function call synchronization.
430 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
431 cnd_wait for conditional variables.
433 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
435 Application developers must link against libpthread to use ISO C threads.
437 Deprecated and removed features, and other changes affecting compatibility:
439 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
440 installed. Software that was using either header should be updated to
441 use standard <stdio.h> interfaces instead.
443 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
444 This was never required by the C standard, and the macros just expanded
445 to call alternative names for the same functions. If you hoped getc and
446 putc would provide performance improvements over fgetc and fputc, instead
447 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
448 necessary, flockfile and funlockfile.
450 * All stdio functions now treat end-of-file as a sticky condition. If you
451 read from a file until EOF, and then the file is enlarged by another
452 process, you must call clearerr or another function with the same effect
453 (e.g. fseek, rewind) before you can read the additional data. This
454 corrects a longstanding C99 conformance bug. It is most likely to affect
455 programs that use stdio to read interactive input from a terminal.
458 * The macros 'major', 'minor', and 'makedev' are now only available from
459 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
460 headers that happen to include <sys/types.h>. These macros are rarely
461 used, not part of POSIX nor XSI, and their names frequently collide with
462 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
465 <sys/sysmacros.h> is a GNU extension. Portable programs that require
466 these macros should first include <sys/types.h>, and then include
467 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
469 * The tilegx*-*-linux-gnu configurations are no longer supported.
471 * The obsolete function ustat is no longer available to newly linked
472 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
473 function has been deprecated in favor of fstatfs and statfs.
475 * The obsolete function nfsservctl is no longer available to newly linked
476 binaries. This function was specific to systems using the Linux kernel
477 and could not usefully be used with the GNU C Library on systems with
478 version 3.1 or later of the Linux kernel.
480 * The obsolete function name llseek is no longer available to newly linked
481 binaries. This function was specific to systems using the Linux kernel
482 and was not declared in a header. Programs should use the lseek64 name
483 for this function instead.
485 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
486 getaddrinfo and getnameinfo functions have been deprecated. The behavior
487 previously selected by them is now always enabled.
489 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
490 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
491 restriction (rejecting '_' in host names, among other things) has been
492 removed, for increased compatibility with non-IDN name resolution.
494 * The fcntl function now have a Long File Support variant named fcntl64. It
495 is added to fix some Linux Open File Description (OFD) locks usage on non
496 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
497 fcntl and LFS support is handled transparently. Also for Linux, the OFD
498 locks act as a cancellation entrypoint.
500 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
501 ecb_crypt, and des_setparity are no longer available to newly linked
502 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
503 longer installed. These functions encrypted and decrypted data with the
504 DES block cipher, which is no longer considered secure. Software that
505 still uses these functions should switch to a modern cryptography library,
508 * Reflecting the removal of the encrypt and setkey functions above, the
509 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
510 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
513 * The obsolete function fcrypt is no longer available to newly linked
514 binaries. It was just another name for the standard function crypt,
515 and it has not appeared in any header file in many years.
517 * We have tentative plans to hand off maintenance of the passphrase-hashing
518 library, libcrypt, to a separate development project that will, we hope,
519 keep up better with new passphrase-hashing algorithms. We will continue
520 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
521 'crypt_r' should not need to change at all; however, distributions will
522 need to install <crypt.h> and libcrypt from a separate project.
524 In this release, if the configure option --disable-crypt is used, glibc
525 will not install <crypt.h> or libcrypt, making room for the separate
526 project's versions of these files. The plan is to make this the default
527 behavior in a future release.
529 Changes to build and runtime requirements:
531 GNU make 4.0 or later is now required to build glibc.
533 Security related changes:
535 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
536 been fixed by removing the glibc-internal IDNA implementation and using
537 the system-provided libidn2 library instead. Originally reported by Hanno
538 Böck and Christian Weisgerber.
540 CVE-2017-18269: An SSE2-based memmove implementation for the i386
541 architecture could corrupt memory. Reported by Max Horn.
543 CVE-2018-11236: Very long pathname arguments to realpath function could
544 result in an integer overflow and buffer overflow. Reported by Alexey
547 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
548 architecture could write beyond the target buffer, resulting in a buffer
549 overflow. Reported by Andreas Schwab.
551 The following bugs are resolved with this release:
553 [1190] stdio: fgetc()/fread() behaviour is not POSIX compliant
554 [6889] manual: 'PWD' mentioned but not specified
555 [13575] libc: SSIZE_MAX defined as LONG_MAX is inconsistent with ssize_t,
556 when __WORDSIZE != 64
557 [13762] regex: re_search etc. should return -2 on memory exhaustion
558 [13888] build: /tmp usage during testing
559 [13932] math: dbl-64 pow unexpectedly slow for some inputs
560 [14092] nptl: Support C11 threads
561 [14095] localedata: Review / update collation data from Unicode / ISO
563 [14508] libc: -Wformat warnings
564 [14553] libc: Namespace pollution loff_t in sys/types.h
565 [14890] libc: Make NT_PRFPREG canonical.
566 [15105] libc: Extra PLT references with -Os
567 [15512] libc: __bswap_constant_16 not compiled when -Werror -Wsign-
569 [16335] manual: Feature test macro documentation incomplete and out of
571 [16552] libc: Unify umount implementations in terms of umount2
572 [17082] libc: htons et al.: statement-expressions prevent use on global
573 scope with -O1 and higher
574 [17343] libc: Signed integer overflow in /stdlib/random_r.c
575 [17438] localedata: pt_BR: wrong d_fmt delimiter
576 [17662] libc: please implement binding for the new renameat2 syscall
577 [17721] libc: __restrict defined as /* Ignore */ even in c11
578 [17979] libc: inconsistency between uchar.h and stdint.h
579 [18018] dynamic-link: Additional $ORIGIN handling issues (CVE-2011-0536)
580 [18023] libc: extend_alloca is broken (questionable pointer comparison,
581 horrible machine code)
582 [18124] libc: hppa: setcontext erroneously returns -1 as exit code for
584 [18471] libc: llseek should be a compat symbol
585 [18473] soft-fp: [powerpc-nofpu] __sqrtsf2, __sqrtdf2 should be compat
587 [18991] nss: nss_files skips large entry in database
588 [19239] libc: Including stdlib.h ends up with macros major and minor being
590 [19463] libc: linknamespace failures when compiled with -Os
591 [19485] localedata: csb_PL: Update month translations + add yesstr/nostr
592 [19527] locale: Normalized charset name not recognized by setlocale
593 [19667] string: Missing Sanity Check for malloc calls in file 'testcopy.c'
594 [19668] libc: Missing Sanity Check for malloc() in file 'tst-setcontext-
596 [19728] network: out of bounds stack read in libidn function
597 idna_to_ascii_4i (CVE-2016-6261)
598 [19729] network: out of bounds heap read on invalid utf-8 inputs in
599 stringprep_utf8_nfkc_normalize (CVE-2016-6263)
600 [19818] dynamic-link: Absolute (SHN_ABS) symbols incorrectly relocated by
602 [20079] libc: Add SHT_X86_64_UNWIND to elf.h
603 [20251] libc: 32bit programs pass garbage in struct flock for OFD locks
604 [20419] dynamic-link: files with large allocated notes crash in
606 [20530] libc: bswap_16 should use __builtin_bswap16() when available
607 [20890] dynamic-link: ldconfig: fsync the files before atomic rename
608 [20980] manual: CFLAGS environment variable replaces vital options
609 [21163] regex: Assertion failure in pop_fail_stack when executing a
610 malformed regexp (CVE-2015-8985)
611 [21234] manual: use of CFLAGS makes glibc detect no optimization
612 [21269] dynamic-link: i386 sigaction sa_restorer handling is wrong
613 [21313] build: Compile Error GCC 5.4.0 MIPS with -0S
614 [21314] build: Compile Error GCC 5.2.0 MIPS with -0s
615 [21508] locale: intl/tst-gettext failure with latest msgfmt
616 [21547] localedata: Tibetan script collation broken (Dzongkha and Tibetan)
617 [21812] network: getifaddrs() returns entries with ifa_name == NULL
618 [21895] libc: ppc64 setjmp/longjmp not fully interoperable with static
620 [21942] dynamic-link: _dl_dst_substitute incorrectly handles $ORIGIN: with
622 [22241] localedata: New locale: Yakut (Sakha) locale for Russia (sah_RU)
623 [22247] network: Integer overflow in the decode_digit function in
624 puny_decode.c in libidn (CVE-2017-14062)
625 [22342] nscd: NSCD not properly caching netgroup
626 [22391] nptl: Signal function clear NPTL internal symbols inconsistently
627 [22550] localedata: es_ES locale (and other es_* locales): collation
628 should treat ñ as a primary different character, sync the collation
629 for Spanish with CLDR
630 [22638] dynamic-link: sparc: static binaries are broken if glibc is built
631 by gcc configured with --enable-default-pie
632 [22639] time: year 2039 bug for localtime etc. on 64-bit platforms
633 [22644] string: memmove-sse2-unaligned on 32bit x86 produces garbage when
634 crossing 2GB threshold (CVE-2017-18269)
635 [22646] localedata: redundant data (LC_TIME) for es_CL, es_CU, es_EC and
637 [22735] time: Misleading typo in time.h source comment regarding
639 [22753] libc: preadv2/pwritev2 fallback code should handle offset=-1
640 [22761] libc: No trailing `%n' conversion specifier in FMT passed from
641 `__assert_perror_fail ()' to `__assert_fail_base ()'
642 [22766] libc: all glibc internal dlopen should use RTLD_NOW for robust
644 [22786] libc: Stack buffer overflow in realpath() if input size is close
645 to SSIZE_MAX (CVE-2018-11236)
646 [22787] dynamic-link: _dl_check_caller returns false when libc is linked
647 through an absolute DT_NEEDED path
648 [22792] build: tcb-offsets.h dependency dropped
649 [22797] libc: pkey_get() uses non-reserved name of argument
650 [22807] libc: PTRACE_* constants missing for powerpc
651 [22818] glob: posix/tst-glob_lstat_compat failure on alpha
652 [22827] dynamic-link: RISC-V ELF64 parser mis-reads flag in ldconfig
653 [22830] malloc: malloc_stats doesn't restore cancellation state on stderr
654 [22848] localedata: ca_ES: update date definitions from CLDR
655 [22862] build: _DEFAULT_SOURCE is defined even when _ISOC11_SOURCE is
656 [22884] math: RISCV fmax/fmin handle signalling NANs incorrectly
657 [22896] localedata: Update locale data for an_ES
658 [22902] math: float128 test failures with GCC 8
659 [22918] libc: multiple common of `__nss_shadow_database'
660 [22919] libc: sparc32: backtrace yields infinite backtrace with
662 [22926] libc: FTBFS on powerpcspe
663 [22932] localedata: lt_LT: Update of abbreviated month names from CLDR
665 [22937] localedata: Greek (el_GR, el_CY) locales actually need ab_alt_mon
666 [22947] libc: FAIL: misc/tst-preadvwritev2
667 [22963] localedata: cs_CZ: Add alternative month names
668 [22987] math: [powerpc/sparc] fdim inlines errno, exceptions handling
669 [22996] localedata: change LC_PAPER to en_US in es_BO locale
670 [22998] dynamic-link: execstack tests are disabled when SELinux is
672 [23005] network: Crash in __res_context_send after memory allocation
674 [23007] math: strtod cannot handle -nan
675 [23024] nss: getlogin_r is performing NSS lookups when loginid isn't set
676 [23036] regex: regex equivalence class regression
677 [23037] libc: initialize msg_flags to zero for sendmmsg() calls
678 [23069] libc: sigaction broken on riscv64-linux-gnu
679 [23094] localedata: hr_HR: wrong thousands_sep and mon_thousands_sep
680 [23102] dynamic-link: Incorrect parsing of multiple consecutive $variable
681 patterns in runpath entries (e.g. $ORIGIN$ORIGIN)
682 [23137] nptl: s390: pthread_join sometimes block indefinitely (on 31bit
683 and libc build with -Os)
684 [23140] localedata: More languages need two forms of month names
685 [23145] libc: _init/_fini aren't marked as hidden
686 [23152] localedata: gd_GB: Fix typo in "May" (abbreviated)
687 [23171] math: C++ iseqsig for long double converts arguments to double
688 [23178] nscd: sudo will fail when it is run in concurrent with commands
689 that changes /etc/passwd
690 [23196] string: __mempcpy_avx512_no_vzeroupper mishandles large copies
692 [23206] dynamic-link: static-pie + dlopen breaks debugger interaction
693 [23208] localedata: New locale - Lower Sorbian (dsb)
694 [23233] regex: Memory leak in build_charclass_op function in file
696 [23236] stdio: Harden function pointers in _IO_str_fields
697 [23250] nptl: Offset of __private_ss differs from GCC
698 [23253] math: tgamma test suite failures on i686 with -march=x86-64
699 -mtune=generic -mfpmath=sse
700 [23259] dynamic-link: Unsubstituted ${ORIGIN} remains in DT_NEEDED for
702 [23264] libc: posix_spawnp wrongly executes ENOEXEC in non compat mode
703 [23266] nis: stringop-truncation warning with new gcc8.1 in nisplus-
705 [23272] math: fma(INFINITY,INFIITY,0.0) should be INFINITY
706 [23277] math: nan function should not have const attribute
707 [23279] math: scanf and strtod wrong for some hex floating-point
708 [23280] math: wscanf rounds wrong; wcstod is ok for negative numbers and
710 [23290] localedata: IBM273 is not equivalent to ISO-8859-1
711 [23303] build: undefined reference to symbol
712 '__parse_hwcap_and_convert_at_platform@@GLIBC_2.23'
713 [23307] dynamic-link: Absolute symbols whose value is zero ignored in
715 [23313] stdio: libio vtables validation and standard file object
717 [23329] libc: The __libc_freeres infrastructure is not properly run across
719 [23349] libc: Various glibc headers no longer compatible with
721 [23351] malloc: Remove unused code related to heap dumps and malloc
723 [23363] stdio: stdio-common/tst-printf.c has non-free license
724 [23396] regex: Regex equivalence regression in single-byte locales
725 [23422] localedata: oc_FR: More updates of locale data
726 [23442] build: New warning with GCC 8
727 [23448] libc: Out of bounds access in IBM-1390 converter
728 [23456] libc: Wrong index_cpu_LZCNT
729 [23458] build: tst-get-cpu-features-static isn't added to tests
730 [23459] libc: COMMON_CPUID_INDEX_80000001 isn't populated for Intel
732 [23467] dynamic-link: x86/CET: A property note parser bug
739 * The GNU C Library can now be compiled with support for building static
740 PIE executables (See --enable-static-pie in INSTALL). These static PIE
741 executables are like static executables but can be loaded at any address
742 and provide additional security hardening benefits at the cost of some
743 memory and performance. When the library is built with --enable-static-pie
744 the resulting libc.a is usable with GCC 8 and above to create static PIE
745 executables using the GCC option '-static-pie'. This feature is currently
746 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
747 aarch64 with binutils 2.30 or later.
749 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
750 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
753 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
755 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
757 * In order to support faster and safer process termination the malloc API
758 family of functions will no longer print a failure address and stack
759 backtrace after detecting heap corruption. The goal is to minimize the
760 amount of work done after corruption is detected and to avoid potential
761 security issues in continued process execution. Reducing shutdown time
762 leads to lower overall process restart latency, so there is benefit both
763 from a security and performance perspective.
765 * The abort function terminates the process immediately, without flushing
766 stdio streams. Previous glibc versions used to flush streams, resulting
767 in deadlocks and further data corruption. This change also affects
768 process aborts as the result of assertion failures.
770 * On platforms where long double has the IEEE binary128 format (aarch64,
771 alpha, mips64, riscv, s390 and sparc), the math library now implements
772 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
773 These are the same interfaces added in version 2.26 for some platforms where
774 this format is supported but is not the format of long double.
776 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
777 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
778 implements interfaces for that type, as defined by ISO/IEC TS
779 18661-3:2015. These are corresponding interfaces to those supported for
782 * The math library now implements interfaces for the _Float32, _Float64 and
783 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
784 corresponding interfaces to those supported for _Float128.
786 * glibc now implements the memfd_create and mlock2 functions on Linux.
788 * Support for memory protection keys was added. The <sys/mman.h> header now
789 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
792 * The copy_file_range function was added.
794 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
796 * The ldconfig utility now processes `include' directives using the C/POSIX
797 collation ordering. Previous glibc versions used locale-specific
798 ordering, the change might break systems that relied on that.
800 * Support for two grammatical forms of month names has been added.
801 In a call to strftime, the "%B" and "%b" format specifiers will now
802 produce the grammatical form required when the month is used as part
803 of a complete date. New "%OB" and "%Ob" specifiers produce the form
804 required when the month is named by itself. For instance, in Greek
805 and in many Slavic and Baltic languages, "%B" will produce the month
806 in genitive case, and "%OB" will produce the month in nominative case.
808 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
809 are all valid and will all accept any known form of month
810 name---standalone or complete, abbreviated or full. In a call to
811 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
812 the strings used by "%B" and "%b", respectively. New query
813 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
814 used by "%OB" and "%Ob", respectively.
816 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
817 define the strings for %OB and %Ob, respectively; these have the
818 same syntax as "mon" and "abmon". These arrays are optional; if they
819 are not provided then they have the same content as "mon" and "abmon",
822 These features are provided for locales which define "alt_mon" and/or
823 "ab_alt_mon" in their locale source data. This release includes such
824 alternative month name data for the following languages: Belarusian,
825 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
827 This feature is currently a GNU extension, but it is expected to
828 be added to the next revision of POSIX, and it is also already
829 available on some BSD-derived operating systems.
831 This feature will cause existing statically compiled applications
832 to fail to load locales and fall back to the builtin C/POSIX locales.
833 See notes below for other changes affecting compatibility.
835 * Support for the RISC-V ISA running on Linux has been added. This port
836 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
837 for the following ISA and ABI pairs:
843 Deprecated and removed features, and other changes affecting compatibility:
845 * Statically compiled applications attempting to load locales compiled for the
846 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
847 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
848 support for two grammatical forms of the month names, also extends the locale
849 data binary format. Static applications needing locale support must be
850 recompiled to match the runtime and data they are deployed with. In some
851 distributions there is an upgrade window where dynamically linked applications
852 may use a new library but the old locale data and also fall back to the
853 builtin C/POSIX locales; restarting the application process is sufficient to
856 * Support for statically linked applications which call dlopen is deprecated
857 and will be removed in a future version of glibc. Applications which call
858 dlopen need to be linked dynamically instead.
860 * Support for old programs which use internal stdio data structures and
861 functions is deprecated. This includes programs which use the C++ streams
862 provided by libstdc++ in GCC 2.95. Programs which use the internal
863 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
864 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
865 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
866 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
867 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
868 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
869 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
870 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
871 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
872 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
873 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
874 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
875 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
876 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
877 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
878 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
879 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
880 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
881 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
882 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
883 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
884 future version of glibc. Unlike other symbol removals, these old
885 applications will not be supported using compatibility symbols.
887 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
888 defined by <sys/ptrace.h>.
890 * libm no longer supports SVID error handling (calling a user-provided
891 matherr function on error) or the _LIB_VERSION variable to control error
892 handling. (SVID error handling and the _LIB_VERSION variable still work
893 for binaries linked against older versions of the GNU C Library.) The
894 libieee.a library is no longer provided. math.h no longer defines struct
895 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
896 TLOSS, PLOSS and HUGE.
898 * The libm functions pow10, pow10f and pow10l are no longer supported for
899 new programs. Programs should use the standard names exp10, exp10f and
900 exp10l for these functions instead.
902 * The mcontext_t type is no longer the same as struct sigcontext. On
903 platforms where it was previously the same, this changes the C++ name
904 mangling for interfaces involving this type.
906 * The add-ons mechanism for building additional packages at the same time as
907 glibc has been removed. The --enable-add-ons configure option is now
910 * The --without-fp configure option is now ignored. Whether hardware
911 floating-point instructions are used is now configured based on whether
912 the compiler used at configure time (without any options implied by a
913 --with-cpu= configure option) uses such instructions.
915 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
916 the specified string can be parsed as a domain name.
918 * In the malloc_info output, the <heap> element may contain another <aspace>
919 element, "subheaps", which contains the number of sub-heaps.
921 * The libresolv function p_secstodate is no longer supported for new
924 * The tilepro-*-linux-gnu configuration is no longer supported.
926 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
927 and will be removed in a future release. Software that is still using
928 either header should be updated to use standard <stdio.h> interfaces
931 libio.h was originally the header for a set of supported GNU extensions,
932 but they have not been maintained as such in many years, they are now
933 standing in the way of improvements to stdio, and we don't think there are
934 any remaining external users. _G_config.h was never intended for public
935 use, but predates the bits convention.
937 Changes to build and runtime requirements:
939 * bison version 2.7 or later is required to generate code in the 'intl'
942 Security related changes:
944 CVE-2009-5064: The ldd script would sometimes run the program under
945 examination directly, without preventing code execution through the
946 dynamic linker. (The glibc project disputes that this is a security
947 vulnerability; only trusted binaries must be examined using the ldd
950 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
951 suffered from a one-byte overflow during ~ operator processing (either
952 on the stack or the heap, depending on the length of the user name).
953 Reported by Tim RĂŒhsen.
955 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
956 would sometimes fail to free memory allocated during ~ operator
957 processing, leading to a memory leak and, potentially, to a denial
960 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
961 without GLOB_NOESCAPE, could write past the end of a buffer while
962 unescaping user names. Reported by Tim RĂŒhsen.
964 CVE-2017-17426: The malloc function, when called with an object size near
965 the value SIZE_MAX, would return a pointer to a buffer which is too small,
966 instead of NULL. This was a regression introduced with the new malloc
967 thread cache in glibc 2.26. Reported by Iain Buclaw.
969 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
970 to the allocation of too much memory. (This is not a security bug per se,
971 it is mentioned here only because of the CVE assignment.) Reported by
974 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
975 of the number of search path components. (This is not a security
976 vulnerability per se because no trust boundary is crossed if the fix for
977 CVE-2017-1000366 has been applied, but it is mentioned here only because
978 of the CVE assignment.) Reported by Qualys.
980 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
981 for AT_SECURE or SUID binaries could be used to load libraries from the
984 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
985 succeeds without returning an absolute path due to unexpected behaviour
986 of the Linux kernel getcwd syscall. Reported by halfdog.
988 CVE-2018-6485: The posix_memalign and memalign functions, when called with
989 an object size near the value of SIZE_MAX, would return a pointer to a
990 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
992 CVE-2018-6551: The malloc function, when called with an object size near
993 the value of SIZE_MAX, would return a pointer to a buffer which is too
994 small, instead of NULL.
996 The following bugs are resolved with this release:
998 [866] glob: glob should match dangling symlinks
999 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
1000 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
1002 [5997] math: Very slow execution of sinf function
1003 [10580] localedata: hr_HR: updated locale
1004 [10871] locale: 'mon' array should contain both nominative and genitive
1006 [12349] localedata: eu_ES: incorrect thousands separator
1007 [13605] localedata: shn_MM: new Shan locale
1008 [13805] localedata: ru_RU: currency should use ',' as radix point
1009 [13953] localedata: km_KH: locale update
1010 [13994] localedata: mjw_IN: new locale
1011 [14121] build: make writes .mo files in po directory
1012 [14333] libc: Fix the race between atexit() and exit()
1013 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
1014 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
1016 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
1017 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
1018 width Latin characters
1019 [15332] localedata: es_CU: locale update
1020 [15436] stdio: Don't close or flush stdio streams on abort
1021 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
1023 [16148] localedata: ca_ES: incorrect thousands separator
1024 [16750] dynamic-link: ldd should not try to execute the binaries
1026 [16777] localedata: pl_PL: incorrect thousands separator in locale
1027 [16905] localedata: hanzi: new collation
1028 [17563] localedata: cmn_TW: add hanzi collation
1029 [17750] localedata: wrong collation order of diacritics in most locales
1030 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
1032 [17956] build: Build fails on missing definitions from header file
1033 nss/nss.h when Mozilla NSS is used for cryptography
1034 [18203] libc: realpath() does not handle unreachable paths correctly
1035 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
1036 [18812] localedata: kab_DZ: new Kabyle Algeria locale
1037 [18822] libc: Internal functions are called via PLT
1038 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
1039 [19170] libc: __gmon_start__ defined in hppa in crtn.S
1040 [19574] libc: glibc should support building static PIE binaries
1041 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
1043 [19971] glob: glob: Do not skip entries with zero d_ino values
1044 [19982] localedata: fr.po: spelling mistake for error code EXDEV
1045 [20008] localedata: km_KH: convert to translit_neutral
1046 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
1047 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
1048 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
1049 [20482] localedata: de_CH: abbreviated weekdays should be two letters
1050 [20498] localedata: miq_NI: new MĂskitu / Miskito (miq) language locale
1052 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
1053 they're set, wrong errors returned by gaih_inet when lookup functions
1055 [20756] localedata: [PATCH] Use Unicode wise thousands separator
1056 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
1058 [20952] localedata: yuw_PG: new locale
1059 [21084] localedata: charmaps/IBM858: new codepage
1060 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
1061 [21242] libc: assert gives pedantic warning in old gcc versions
1062 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
1063 __regcall calling convention
1064 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
1065 [21326] libc: C99 functions are not declared for C++11 and later if
1066 _GNU_SOURCE is not predefined by g++
1067 [21457] libc: sys/ucontext.h namespace
1068 [21530] libc: tmpfile() should be implemented using O_TMPFILE
1069 [21660] math: GCC fails to compile a formula with tgmath.h
1070 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
1071 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
1072 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
1073 [21684] math: tgmath.h handling of complex integers
1074 [21685] math: tgmath.h handling of bit-fields
1075 [21686] math: tgmath.h handling of __int128
1076 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1078 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
1080 [21750] localedata: column width of characters incompatible with classical
1082 [21754] malloc: malloc: Perform as little work as possible after heap
1083 consistency check failures
1084 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
1085 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
1086 [21791] string: Unused XXX_chk_XXX functions in libc.a
1087 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
1089 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
1091 [21845] localedata: Added new Locale bho_NP
1092 [21853] localedata: Fix abday Which looks same as day in zh_SG
1093 [21854] localedata: Added New Locale en_SC
1094 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
1095 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
1096 _dl_runtime_resolve_avx_slow
1097 [21885] network: getaddrinfo: gethosts does not release resolver context
1098 on memory allocation failure
1099 [21899] libc: XPG4.2 sigaction namespace
1100 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
1102 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
1104 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
1105 errno value, causing getaddrinfo to fail
1106 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
1107 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
1108 instead of EAI_NODATA
1109 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
1110 constant PTRACE_SEIZE_DEVEL
1111 [21930] math: C-only gcc builtins used in <math.h> isinf
1112 [21932] network: Unpaired __resolv_context_get in generic get*_r
1114 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
1115 [21944] libc: sigval namespace
1116 [21951] localedata: Update hanzi collation by stroke
1117 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
1118 sysdeps/x86_64/fpu/e_expf.S
1119 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
1120 allocation in syscall loops)
1121 [21959] localedata: Fix Country name for xh_ZA
1122 [21960] localedata: Fix abmon for bem_ZM
1123 [21966] math: AVX2 mathvec functions use FMA without checking
1124 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
1125 [21971] localedata: Added New Locale for mfe_MU
1126 [21972] libc: assert macro requires operator== (int) for its argument type
1127 [21973] math: [sparc] libm missing sqrtl compat symbol
1128 [21974] libc: Remove __bb_init_func and __bb_exit_func
1129 [21982] string: stratcliff.c: error: assuming signed overflow does not
1131 [21986] stdio: __guess_grouping is called incorrectly
1132 [21987] math: [sparc32] wrong bits/long-double.h installed
1133 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
1135 [22022] localedata: Missing country_name for mni_IN
1136 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
1138 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
1140 [22026] locale: iconv_open: heap overflow on gconv_init failure
1141 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
1142 [22035] math: [m68k] bits/math-inline.h macro namespace
1143 [22038] localedata: Fix abbreviated weeks and months for Somali
1144 [22044] localedata: Remove redundant data for Limburgish Language
1145 [22050] malloc: Linking with -lmcheck does not hook
1146 __malloc_initialize_hook correctly
1147 [22051] libc: zero terminator in the middle of glibc's .eh_frame
1148 [22052] malloc: malloc failed to compile with GCC 7 and -O3
1149 [22070] localedata: charmaps/UTF-8: wcwidth for
1150 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
1151 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
1152 Jungseong and Jongseong) should be 0
1153 [22078] nss: nss_files performance issue in multi mode
1154 [22082] math: bits/math-finite.h exp10 condition
1155 [22086] libc: pcprofiledump incorrect cross-endian condition
1156 [22093] dynamic-link: ld.so no longer searches in .../x86_64
1157 [22095] network: Name server address allocation memory leak in resolv.conf
1159 [22096] network: __resolv_conf_attach can incorrectly free passed conf
1161 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
1162 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
1164 [22111] malloc: malloc: per thread cache is not returned when thread exits
1165 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
1166 [22134] libc: [linux] implement fexecve with execveat
1167 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
1169 [22145] libc: ttyname() gives up too early in the face of namespaces
1170 [22146] math: C++ build issue with float128 on x86_64
1171 [22153] nptl: nptl: save error code before process termination
1172 [22156] libc: [hppa,ia64,microblaze] Executable stack default
1173 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
1174 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
1175 [22165] libc: [hppa] Text relocations in libc.so
1176 [22180] libc: destructor registered via __cxa_atexit is called twice
1177 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
1178 symlinks") cause "make" segfaults
1179 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
1181 [22207] libc: FAIL: stdlib/test-atexit-race
1182 [22225] math: nearbyint arithmetic moved before feholdexcept
1183 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
1184 [22235] math: iscanonical in C++ and float128
1185 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
1186 the svid compat wrapper
1187 [22244] math: ynf and yn are wrong without the svid compat wrapper
1188 [22273] libc: Improper assert in Linux posix_spawn implementation
1189 [22284] libc: -pg -pie doesn't work
1190 [22292] locale: localedef exits with error 4 when it should be error 1
1191 [22294] locale: Allow "" for int_currency_symbol definition in locales.
1192 [22295] locale: Don't warn on non-symbolic characters in locale sources in
1194 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
1195 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
1197 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
1198 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
1199 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
1200 [22322] libc: [mips64] wrong bits/long-double.h installed
1201 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
1202 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
1204 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
1205 [22343] malloc: Integer overflow in posix_memalign
1206 [22347] libc: getrandom() returns the number of bytes that were copied to
1207 the buffer even though the comments say "Return 0 on success and -1 on
1209 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
1210 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
1212 [22370] dynamic-link: Incorrect note padding check
1213 [22375] libc: malloc returns pointer from tcache_get when should return
1214 NULL (CVE-2017-17426)
1215 [22377] math: iseqsig, float128 and C++
1216 [22382] localedata: Error in tpi_PG locale
1217 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
1218 inside the ASCII printable range
1219 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
1221 [22403] localedata: Slash needs escaping in some locales
1222 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
1223 [22409] network: res_hnok does not accept some host names used on the
1225 [22412] network: res_dnok, res_hnok should perform syntax checks
1226 [22413] network: ns_name_pton ignores syntactically invalid trailing
1228 [22415] stdio: setvbuf can lead to invalid free/segfault
1229 [22432] build: Non-deterministic build
1230 [22439] malloc: malloc_info should compute summary statistics for all sub-
1232 [22442] network: if_nametoindex could report index for the wrong
1233 networking interface
1234 [22446] build: aliasing violation calling readlink in handle_request
1235 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
1236 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
1237 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
1238 __nscd_hash/__nss_hash
1239 [22463] network: p_secstodate overflow handling
1240 [22469] localedata: pl_PL LC_COLLATE does not use i18n
1241 [22478] libc: sigwait can fail with EINTR
1242 [22505] libc: ldconfig processes include directive in locale-specific
1244 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
1245 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
1246 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
1247 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
1248 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
1249 [22534] localedata: Collation rules for Serbian and Bosnian should be the
1250 same as for Croatian
1251 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
1252 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
1253 [22577] libc: missing newline after "cannot allocate TLS data structures
1255 [22588] manual: manual/conf.texi: missing underscore in front of
1257 [22593] math: nextafter and nexttoward are declared with const attribute
1258 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
1259 [22603] string: ia64 memchr overflows internal pointer check
1260 [22605] libc: SH clone does not set the exit code correctly
1261 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
1263 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
1264 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
1265 modified in case of success
1266 [22614] build: gcc: error: unrecognized command line option â-no-pieâ
1267 [22615] manual: manual: ambiguous wording about errno value in case of
1269 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
1271 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
1272 binaries or if /proc is not mounted (CVE-2017-16997)
1273 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
1274 [22630] build: $(no-pie-ldflag) is no longer effective
1275 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
1276 [22635] nptl: pthread_self returns NULL before libpthread is loaded
1277 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
1278 [22637] nptl: guard size is subtracted from thread stack size instead of
1280 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
1281 [22657] localedata: hu_HU: Avoid double space in date
1282 [22660] math: fmax, fmin sNaN handling on alpha
1283 [22664] libc: New warning of GCC8
1284 [22665] math: alpha: ceil and floor raise inexact exceptions
1285 [22666] math: alpha: trunc raise inexact exceptions
1286 [22667] libc: makecontext lacks stack alignment on i386
1287 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
1288 [22679] libc: getcwd(3) can succeed without returning an absolute path
1290 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
1291 elision and tunables
1292 [22687] math: [powerpc-nofpu] complex long double functions spurious
1294 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
1295 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
1296 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
1298 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
1299 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
1301 [22701] nis: Incomplete removal of libnsl
1302 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
1303 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
1304 [22715] dynamic-link: FAIL: elf/tst-audit10
1305 [22719] libc: Backtrace tests fail on hppa
1306 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
1307 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
1308 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
1309 before the first call to crypt_r () in crypt/badsalttest.c
1316 * A per-thread cache has been added to malloc. Access to the cache requires
1317 no locks and therefore significantly accelerates the fast path to allocate
1318 and free small amounts of memory. Refilling an empty cache requires locking
1319 the underlying arena. Performance measurements show significant gains in a
1320 wide variety of user workloads. Workloads were captured using a special
1321 instrumented malloc and analyzed with a malloc simulator. Contributed by
1322 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
1324 * Unicode 10.0.0 Support: Character encoding, character type info, and
1325 transliteration tables are all updated to Unicode 10.0.0, using
1326 generator scripts contributed by Mike FABIAN (Red Hat).
1327 These updates cause user visible changes, especially the changes in
1328 wcwidth for many emoji characters cause problems when emoji sequences
1329 are rendered with pango, see for example:
1330 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
1332 * Collation of Hungarian has been overhauled and is now consistent with "The
1333 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
1336 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
1338 - The GNU C Library will now detect when /etc/resolv.conf has been
1339 modified and reload the changed configuration. The new resolver option
1340 âno-reloadâ (RES_NORELOAD) disables this behavior.
1342 - The GNU C Library now supports an arbitrary number of search domains
1343 (configured using the âsearchâ directive in /etc/resolv.conf);
1344 previously, there was a hard limit of six domains. For backward
1345 compatibility, applications that directly modify the â_resâ global
1346 object are still limited to six search domains.
1348 - When the ârotateâ (RES_ROTATE) resolver option is active, the GNU C
1349 Library will now randomly pick a name server from the configuration as a
1350 starting point. (Previously, the second name server was always used.)
1352 * The tunables feature is now enabled by default. This allows users to tweak
1353 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
1355 * New function reallocarray, which resizes an allocated block (like realloc)
1356 to the product of two sizes, with a guaranteed clean failure upon integer
1357 overflow in the multiplication. Originally from OpenBSD, contributed by
1358 Dennis Wölfing and RĂŒdiger Sonderfeld.
1360 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
1361 These are extended versions of preadv and pwritev, respectively, taking an
1362 additional flags argument. The set of supported flags depends on the
1363 running kernel; full support currently requires kernel 4.7 or later.
1365 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
1366 create a new session ID for the spawned process. This feature is
1367 scheduled to be added to the next major revision of POSIX; for the time
1368 being, it is available under _GNU_SOURCE.
1370 * errno.h is now safe to use from C-preprocessed assembly language on all
1371 supported operating systems. In this context, it will only define the
1372 Exxxx constants, as preprocessor macros expanding to integer literals.
1374 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
1375 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
1376 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
1377 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
1379 To compile programs that use this feature, the compiler must support
1380 128-bit floating point with the type name _Float128 (as defined by TS
1381 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
1382 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
1383 must be defined to make the new interfaces visible.
1385 The new functions and macros correspond to those present for other
1386 floating-point types (except for a few obsolescent interfaces not
1387 supported for the new type), with F128 or f128 suffixes; for example,
1388 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
1389 printf or scanf formats for the new type; the strfromf128 and strtof128
1390 interfaces should be used instead.
1392 Deprecated and removed features, and other changes affecting compatibility:
1394 * The synchronization that pthread_spin_unlock performs has been changed to
1395 now be equivalent to a C11 atomic store with release memory order to the
1396 spin lock's memory location. Previously, several (but not all)
1397 architectures used stronger synchronization (e.g., containing what is
1398 often called a full barrier). This change can improve performance, but
1399 may affect odd fringe uses of spin locks that depend on the previous
1400 behavior (e.g., using spin locks as atomic variables to try to implement
1401 Dekker's mutual exclusion algorithm).
1403 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
1406 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
1407 will only be built and installed when the GNU C Library is configured with
1408 --enable-obsolete-rpc. This allows alternative RPC implementations, such
1409 as TIRPC or rpcsvc-proto, to be used.
1411 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
1412 libnss_compat, are deprecated, and will not be built or installed by
1415 The NIS(+) support library, libnsl, is also deprecated. By default, a
1416 compatibility shared library will be built and installed, but not headers
1417 or development libraries. Only a few NIS-related programs require this
1418 library. (In particular, the GNU C Library has never required programs
1419 that use 'gethostbyname' to be linked with libnsl.)
1421 Replacement implementations based on TIRPC, which additionally support
1422 IPv6, are available from <https://github.com/thkukuk/>. The configure
1423 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
1424 name service modules, to be built and installed.
1426 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
1427 support is enabled, the configured recursive resolver must support EDNS.
1428 (Responding to EDNS-enabled queries with responses which are not
1429 EDNS-enabled is fine, but FORMERR responses are not.)
1431 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
1432 servers have not supported this opcode for a long time.
1434 * The _res_opcodes variable has been removed from libresolv. It had been
1435 exported by accident.
1437 * <string.h> no longer includes inline versions of any string functions,
1438 as this kind of optimization is better done by the compiler. The macros
1439 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
1441 * The nonstandard header <xlocale.h> has been removed. Most programs should
1442 use <locale.h> instead. If you have a specific need for the definition of
1443 locale_t with no other declarations, please contact
1444 libc-alpha@sourceware.org and explain.
1446 * The obsolete header <sys/ultrasound.h> has been removed.
1448 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
1450 * The obsolete function cfree has been removed. Applications should use
1453 * The stack_t type no longer has the name struct sigaltstack. This changes
1454 the C++ name mangling for interfaces involving this type.
1456 * The ucontext_t type no longer has the name struct ucontext. This changes
1457 the C++ name mangling for interfaces involving this type.
1459 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
1460 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
1461 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
1462 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
1463 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
1464 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
1465 fpregset_t type no longer has the name struct fpu. This changes the C++
1466 name mangling for interfaces involving those types.
1468 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
1469 synced with the kernel:
1471 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
1472 are not supported on this architecture and have been removed.
1474 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
1475 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
1476 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
1478 Programs that assume the GET/SETREGS ptrace requests are universally
1479 available will now fail to build, instead of malfunctioning at runtime.
1481 Changes to build and runtime requirements:
1483 * Linux kernel 3.2 or later is required at runtime, on all architectures
1484 supported by that kernel. (This is a change from version 2.25 only for
1487 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
1489 * On most architectures, GCC 4.9 or later is required to build the GNU C
1490 Library. On powerpc64le, GCC 6.2 or later is required.
1492 Older GCC versions and non-GNU compilers are still supported when
1493 compiling programs that use the GNU C Library. (We do not know exactly
1494 how old, and some GNU extensions to C may be _de facto_ required. If you
1495 are interested in helping us make this statement less vague, please
1496 contact libc-alpha@sourceware.org.)
1498 Security related changes:
1500 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1501 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1503 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1504 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1506 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1507 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1510 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1511 fixed (CVE-2017-12133).
1513 The following bugs are resolved with this release:
1515 [984] network: Respond to changed resolv.conf in gethostbyname
1516 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1517 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1519 [12189] libc: __stack_chk_fail should not attempt a backtrace
1521 [14096] time: Race condition on timezone/tst-timezone.out
1522 [14172] localedata: az_IR: new locale
1523 [14995] build: glibc fails to build if gold is the default linker, even if
1525 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1526 [16637] network: inet_pton function is accepting IPv6 with bad format
1527 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1528 x86 and other generic code
1529 [16875] localedata: ko_KR: fix lang_name
1530 [17225] localedata: ar_SY: localized month names for May and June are
1532 [17297] localedata: da_DK: wrong date_fmt string
1533 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1534 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1535 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1536 [19066] localedata: ar_SA abbreviated day and month names are in English
1537 [19569] network: resolv: Support an arbitrary number of search domains
1538 [19570] network: Implement random DNS server selection in the stub
1540 [19838] locale: localedef fails on PA-RISC
1541 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1542 order of 0D36 and 0D37
1543 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1545 [20098] libc: FAIL: debug/backtrace-tst on hppa
1546 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1548 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1550 [20313] localedata: Update locale data to Unicode 9.0
1551 [20424] manual: Document how to provide a malloc replacement
1552 [20496] localedata: agr_PE: new language locale AwajĂșn / Aguaruna (agr)
1554 [20686] locale: Add el_GR@euro to SUPPORTED.
1555 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1556 failures consistently
1557 [21015] dynamic-link: Document and fix --enable-bind-now
1558 [21016] nptl: pthread_cond support is broken on hppa
1559 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1560 frame-pointer on i386
1561 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1563 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1564 [21088] libc: Build fails with --enable-static-nss
1565 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1566 generic c code is used
1567 [21109] libc: Tunables broken on big-endian
1568 [21112] math: powf has large ulp errors with base close to 1 and exponent
1570 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1572 [21120] malloc: glibc malloc is incompatible with GCC 7
1573 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1575 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1576 (-0.0) when linking with -lieee
1577 [21171] math: log10, log2 and lgamma return incorrect results
1578 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1579 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1580 [21207] localedata: ce_RU: update weekdays from CLDR
1581 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1582 [21217] localedata: Update months from CLDR-31
1583 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1584 [21243] libc: support_delete_temp_file should issue warning for failed
1586 [21244] libc: support resolv_test_start() socket fd close should be
1588 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1589 new posix_spawn implementation
1590 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1591 leads to lower CPU frequency
1592 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1593 [21261] libc: [sparc64] bits/setjmp.h namespace
1594 [21267] network: [mips] bits/socket.h IOC* namespace
1595 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1596 [21270] libc: mmap64 silently truncates large offset values
1597 [21275] libc: posix_spawn always crashes on ia64 now
1598 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1599 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1600 [21289] libc: Incorrect declaration for 32-bit platforms with
1601 _FILE_OFFSET_BITS=64 causes build error
1602 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1603 not support gethostbyname4_r
1604 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1606 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1608 [21340] libc: Support POSIX_SPAWN_SETSID
1609 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1610 [21359] network: ns_name_pack needs additional byte in destination buffer
1611 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1612 against fragmentation attacks (CVE-2017-12132)
1613 [21369] network: resolv: Remove EDNS fallback
1614 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1616 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1617 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1618 [21393] stdio: Missing dup3 error check in freopen, freopen64
1619 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1620 [21399] localedata: Bad description for U00EC in
1621 localedata/charmaps/CP1254
1622 [21411] malloc: realloc documentation error
1623 [21426] network: sys/socket.h uio.h namespace
1624 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1625 [21445] libc: signal.h bsd_signal namespace
1626 [21455] network: Network headers stdint.h namespace
1627 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1629 [21475] network: resolv: Overlong search path is truncated mid-label
1630 [21511] libc: sigstack namespace
1631 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1632 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1633 bits/syscall.h: No such file or directory
1634 [21517] libc: struct sigaltstack namespace
1635 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1636 [21533] localedata: Update locale data to Unicode 10.0
1638 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1639 junk at end of line, first unrecognized character is `@'
1640 [21538] libc: SIG_HOLD missing for XPG4
1641 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1642 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1643 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1644 [21543] libc: sigevent namespace
1645 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1646 size for general purpose registers in mcontext_t structure
1647 [21550] libc: sigwait namespace
1648 [21552] libc: XPG4 bsd_signal namespace
1649 [21554] libc: sigpause namespace
1650 [21560] libc: sys/wait.h signal.h namespace
1651 [21561] libc: waitid namespace
1652 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1653 '/usr/include/stdlib.h': Permission denied
1654 [21575] libc: sys/wait.h missing struct rusage definition
1655 [21584] libc: sigaltstack etc namespace
1656 [21597] libc: siginterrupt namespace
1657 [21607] math: hppa: FAIL: math/test-tgmath
1658 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1660 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1661 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1662 stack and heap (CVE-2017-1000366)
1663 [21625] libc: wait3 namespace
1664 [21654] nss: Incorrect pointer alignment in NSS group merge result
1666 [21657] network: Parse interface zone id for node-local multicast
1667 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1669 [21666] libc: .symver is used on common symbol
1670 [21668] network: resolv: res_init cross-thread broadcast introduces race
1672 [21687] math: tgmath.h totalorder, totalordermag return type
1673 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1675 [21696] libc: Incorrect assumption of of __cpu_mask in
1676 posix/sched_cpucount.c
1677 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1678 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1680 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1681 leading to relocation crash
1682 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1683 `resolv_conf_matches (resp, conf)' failed.
1684 [21710] localedata: Added Samoan language locale for Samoa
1685 [21711] localedata: Pashto yesstr/nostr locale are missing
1686 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1687 __have_pthread_attr_t can cause redefinition of typedef âpthread_attr_tâ
1688 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1689 [21723] localedata: yesstr/nostr missing for Chinese language locale
1690 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1692 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1694 [21728] localedata: New Locale for Tongan language
1695 [21729] localedata: incorrect LC_NAME fields for hi_IN
1696 [21733] localedata: yesstr and nostr are missing for zh_HK
1697 [21734] localedata: Missing yesstr and nostr are for kw_GB
1698 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1699 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1700 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1701 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1703 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1705 [21749] localedata: Wrong abbreviated day name (âabdayâ) for
1707 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1708 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1709 [21759] localedata: missing yesstr and nostr for Tigrinya
1710 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1711 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1712 [21767] localedata: Missing Bislama locales
1713 [21768] localedata: Missing yesstr and nostr for aa_ET
1714 [21770] localedata: Missing Field in li_NL
1715 [21778] nptl: Robust mutex may deadlock
1716 [21779] libc: MicroBlaze segfaults when loading libpthread
1717 [21783] localedata: Fix int_select international_call_prefixes
1718 [21784] localedata: Inconsistency in country_isbn
1719 [21788] localedata: Missing Country Postal Abbreviations
1720 [21794] localedata: Added-country_isbn-for-Italy
1721 [21795] localedata: Add/Fix country_isbn for France
1722 [21796] localedata: Added country_isbn for Republic of Korea
1723 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1724 [21799] localedata: Added int_select international_call_prefixes
1725 [21801] localedata: Added int_select international_call_prefixes
1726 [21804] nptl: Double semicolon in thread-shared-types.h
1727 [21807] localedata: LC_ADDRESS fix for pap_CW
1728 [21808] localedata: Fix LC_ADDRESS for pap_AW
1729 [21821] localedata: Added country_name in mai_IN
1730 [21822] localedata: Fix LC_TIME for mai_IN
1731 [21823] localedata: missing yesstr, nostr for sa_IN
1732 [21825] localedata: Fix name_mrs for mag_IN
1733 [21828] localedata: 2.26 changelog should mention user visible changes
1735 [21835] localedata: Added Maithili language locale for Nepal
1736 [21838] localedata: Removed redundant data for the_NP
1737 [21839] localedata: Fix LC_MONETARY for ta_LK
1738 [21844] localedata: Fix Latin characters and Months Sequence.
1739 [21848] localedata: Fix mai_NP Title Name
1744 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1745 24731-2:2010, is supported to enable declarations of functions from that
1746 TR. Note that not all functions from that TR are supported by the GNU C
1749 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1750 18661-1:2014, is supported to enable declarations of functions and macros
1751 from that TS. Note that not all features from that TS are supported by
1754 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1755 18661-4:2015, is supported to enable declarations of functions and macros
1756 from that TS. Note that most features from that TS are not supported by
1759 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1760 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1761 Since the GNU C Library defaults to a much newer revision of POSIX, this
1762 will only affect programs that specifically request an old conformance
1763 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1764 see a change in the visible declarations, but a program compiled with
1765 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1768 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1769 defined by all multithreaded code, but glibc has not required this for
1772 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1773 means that in a future release, the macros âmajorâ, âminorâ, and âmakedevâ
1774 will only be available from <sys/sysmacros.h>.
1776 These macros are not part of POSIX nor XSI, and their names frequently
1777 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1778 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1779 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1782 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1783 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1784 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1786 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1787 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1788 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1789 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1790 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1791 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1792 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1793 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1794 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1795 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1796 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1799 * New <math.h> features are added from TS 18661-1:2014:
1801 - Signaling NaN macros: SNANF, SNAN, SNANL.
1803 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1804 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1805 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1807 - llogb functions: the llogb, llogbf and llogbl functions, and the
1808 FP_LLOGB0 and FP_LLOGBNAN macros.
1810 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1813 - Comparison macros: iseqsig.
1815 - Classification macros: iscanonical, issubnormal, iszero.
1817 - Total order functions: totalorder, totalorderf, totalorderl,
1818 totalordermag, totalordermagf, totalordermagl.
1820 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1822 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1823 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1825 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1826 are added to libc. They convert a floating-point number into string.
1828 * Most of glibc can now be built with the stack smashing protector enabled.
1829 It is recommended to build glibc with --enable-stack-protector=strong.
1830 Implemented by Nick Alcock (Oracle).
1832 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1833 intended to be used instead of memset() to erase sensitive data after use;
1834 the compiler will not optimize out calls to explicit_bzero even if they
1835 are "unnecessary" (in the sense that no _correct_ program can observe the
1836 effects of the memory clear).
1838 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1839 to float instead of double. This does not affect the ABI of any libraries
1840 that are part of the GNU C Library, but may affect the ABI of other
1841 libraries that use this type in their interfaces.
1843 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1844 float_t and double_t types are now defined to long double instead of float
1845 and double. These options are not the default, and this does not affect
1846 the ABI of any libraries that are part of the GNU C Library, but it may
1847 affect the ABI of other libraries that use this type in their interfaces,
1848 if they are compiled or used with those options.
1850 * The getentropy and getrandom functions, and the <sys/random.h> header file
1853 * The buffer size for byte-oriented stdio streams is now limited to 8192
1854 bytes by default. Previously, on Linux, the default buffer size on most
1855 file systems was 4096 bytes (and thus remains unchanged), except on
1856 network file systems, where the buffer size was unpredictable and could be
1857 as large as several megabytes.
1859 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1860 for the Linux quota interface which predates kernel version 2.4.22 has
1863 * The malloc_get_state and malloc_set_state functions have been removed.
1864 Already-existing binaries that dynamically link to these functions will
1865 get a hidden implementation in which malloc_get_state is a stub. As far
1866 as we know, these functions are used only by GNU Emacs and this change
1867 will not adversely affect already-built Emacs executables. Any undumped
1868 Emacs executables, which normally exist only during an Emacs build, should
1869 be rebuilt by re-running â./configure; makeâ in the Emacs build tree.
1871 * The âip6-dotintâ and âno-ip6-dotintâ resolver options, and the
1872 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1873 âno-ip6-dotintâ had already been the default, and support for the
1874 âip6-dotintâ option was removed from the Internet in 2006.
1876 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1877 flag from <resolv.h> have been removed. The option relied on a
1878 backwards-incompatible DNS extension which was never deployed on the
1881 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1882 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1883 They were already unimplemented.
1885 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1886 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1887 removed again from the IETF name lookup interface specification in RFC
1888 2553. Applications should use getaddrinfo instead.
1890 * DNSSEC-related declarations and definitions have been removed from the
1891 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1892 decode the data part of DNSSEC record types. Previous versions of glibc
1893 only implemented minimal support for the previous version of DNSSEC, which
1894 is incompatible with the currently deployed version.
1896 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1897 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1898 <arpa/nameser.h> header file because the distinction between RR types and
1899 meta-RR types is not officially standardized, subject to revision, and
1900 thus not suitable for encoding in a macro.
1902 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1903 and rhook members of the res_state type in <resolv.h> have been removed.
1904 The glibc stub resolver did not support these hooks, but the header file
1905 did not reflect that.
1907 * For multi-arch support it is recommended to use a GCC which has
1908 been built with support for GNU indirect functions. This ensures
1909 that correct debugging information is generated for functions
1910 selected by IFUNC resolvers. This support can either be enabled by
1911 configuring GCC with '--enable-gnu-indirect-function', or by
1912 enabling it by default by setting 'default_gnu_indirect_function'
1913 variable for a particular architecture in the GCC source file
1916 * GDB pretty printers have been added for mutex and condition variable
1917 structures in POSIX Threads. When installed and loaded in gdb these pretty
1918 printers show various pthread variables in human-readable form when read
1919 using the 'print' or 'display' commands in gdb.
1921 * Tunables feature added to allow tweaking of the runtime for an application
1922 program. This feature can be enabled with the '--enable-tunables' configure
1923 flag. The GNU C Library manual has details on usage and README.tunables has
1924 instructions on adding new tunables to the library.
1926 * A new version of condition variables functions have been implemented in
1927 the NPTL implementation of POSIX Threads to provide stronger ordering
1930 * A new version of pthread_rwlock functions have been implemented to use a more
1931 scalable algorithm primarily through not using a critical section anymore to
1934 Security related changes:
1936 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1937 have been created with makecontext could fail to terminate due to a
1938 missing .cantunwind annotation. This has been observed to lead to a hang
1939 (denial of service) in some Go applications compiled with gccgo. Reported
1940 by Andreas Schwab. (CVE-2016-6323)
1942 * The DNS stub resolver functions would crash due to a NULL pointer
1943 dereference when processing a query with a valid DNS question type which
1944 was used internally in the implementation. The stub resolver now uses a
1945 question type which is outside the range of valid question type values.
1948 The following bugs are resolved with this release:
1950 [4099] stdio: Overly agressive caching by stream i/o functions.
1951 [7065] build: Support building glibc with -fstack-protector or -fstack-
1953 [9842] localedata: en_CA: incorrect date format
1954 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1955 before it started waiting
1956 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1957 [15765] nptl: sem_open is wrongly a cancellation point
1958 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1959 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1961 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1962 library linked with pthread
1963 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1964 "FIXME: Ingo" issue)
1965 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1966 [17252] libc: getrandom and getentropy syscall
1967 [17730] malloc: thread-local storage is sometimes improperly free()'d
1968 after being __libc_memalign()'d
1969 [18241] stdio: failed fseek on memstream does not set errno and can fail
1971 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
1973 [18463] nptl: pthread_cond_broadcast issue when surrounded by
1974 PTHREAD_PRIO_INHERIT mutex on ARM
1975 [18784] network: res_query and related function crash for special record
1976 type queries (CVE-2015-5180)
1977 [19380] math: strtod does not raise "inexact"
1978 [19387] string: Integer overflow in memchr
1979 [19390] string: Integer overflow in strncat
1980 [19398] build: linknamespace tests fail with massively parallel build
1981 [19402] nptl: Deadlock with robust shared mutex and asynchronous
1983 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
1984 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
1985 [19514] libc: [PATCH] Fix spelling errors in spelling
1986 "implement"/"implementation" in several places
1987 [19582] network: Deprecate RES_USE_INET6
1988 [19673] manual: clog10 docs appear to be erroneous
1989 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
1990 causes a segmentation fault
1991 [19826] libc: invalid pointer returned from __tls_get_addr with static
1993 [20016] network: resolv: Remove hooks support from the API
1994 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
1996 [20033] math: [x86_64] vectorized math function don't call the __finite
1998 [20116] nptl: use after free in pthread_create
1999 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
2000 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
2002 [20311] nptl: please install proc_service.h
2003 [20366] libc: Compilation errors in installed headers in strict-compliance
2005 [20370] malloc: malloc: Arena free list management is still racy
2006 (incorrect fix in bug 19243)
2007 [20386] libc: assert (X = 0) does not result in GCC warning
2008 [20432] malloc: malloc: Minimize interface required for interposition
2009 [20435] libc: Missing unwind info in __startcontext causes infinite loop
2010 in _Unwind_Backtrace (CVE-2016-6323)
2011 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
2012 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
2014 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
2015 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
2016 [20477] network: resolv: incorrect double-checked locking related to
2018 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
2020 [20495] math: x86_64 performance degradation due to AVX/SSE transition
2022 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
2023 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
2024 cause transition penalty
2025 [20517] math: sparcv9 missing fdiml compat symbol
2026 [20524] manual: strverscmp is inconsistent
2027 [20525] libc: <sys/quota.h> should be based on kernel headers
2028 [20539] math: GCC 7 -static -lm fails to link at -O3
2029 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
2031 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
2033 [20591] network: Remove obsolete DNSSEC support
2034 [20592] network: DNS resource record type classification macros in
2035 <arpa/nameser.h> are incorrect
2036 [20593] network: Update DNS RR type definitions
2037 [20611] network: getaddrinfo accepts invalid numeric scope IDs
2038 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
2040 [20629] network: libresolv: Remove support for bitstring labels
2042 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
2043 assertion: "maxidx >= 2"
2044 [20660] math: [arm] Use VSQRT
2045 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
2046 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
2047 [20689] libc: Test for FMA should also check for AVX.
2048 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
2049 [20715] math: iszero macro breaks existing code
2050 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
2051 [20728] libc: powerpc: Missing TOC stub in clone
2052 [20729] build: glibc-2.24 fails to build for i486 with -Os
2053 [20750] build: Build fails with default PIE enabled gcc-6.x
2054 [20768] math: [alpha] sqrt fegetenv namespace
2055 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
2057 [20787] math: float_t is defined as float incorrectly on x86_64 even if
2058 __FLT_EVAL_METHOD__ is 2
2059 [20790] network: rpcgen buffer overrun in get_prog_declaration
2060 [20822] nptl: race condition in __lll_unlock_elision on powerpc
2061 [20829] libc: crypt snprintf namespace
2062 [20847] libc: tst-vfork3 failure
2063 [20855] math: Default bits/mathdef.h has inappropriate float_t
2064 [20859] math: [sh4] FP_ILOGB0 invalid
2065 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
2066 U+20AC), not same as GBK
2067 [20915] dynamic-link: global-dynamic TLS broken on aarch64
2068 [20916] math: pow handling of sNaN arguments
2069 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
2070 [20919] math: Bad pow (qNaN, 0) result with -lieee
2071 [20940] math: hypot sNaN handling
2072 [20947] math: fmax, fmin sNaN handling
2073 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
2074 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
2076 [20971] string: powerpc64/power7 memchr overflows internal pointer check
2077 [20973] nptl: robust mutexes: Lost wake-ups
2078 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
2079 [20978] nis: strlen on null pointer in nss_nisplus
2080 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
2082 [21014] string: i686 memchr overflows internal pointer check
2083 [21019] libc: [mips] n32 lseek incorrect on overflow
2084 [21022] libc: [microblaze] __backtrace get_frame_size namespace
2085 [21026] libc: [MIPS] readahead syscall is broken on n64
2086 [21028] math: Fallback fesetexceptflag should always succeed
2087 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
2088 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
2090 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
2091 [21061] librt: [microblaze] librt lost clock_* exports
2092 [21073] libc: tunables: insecure environment variables passed to
2093 subprocesses with AT_SECURE
2094 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
2098 * The minimum Linux kernel version that this version of the GNU C Library
2099 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
2100 kernel version 2.6.32 or later suffices (on architectures that already
2101 required kernel versions more recent than 3.2, those requirements remain
2102 unchanged). Linux 3.2 or later kernel headers are required on all
2105 * The pap_AN locale has been deleted. This has been deprecated for a long
2106 time. It has been replaced by pap_AW & pap_CW, both of which have long
2107 been included in previous releases.
2109 * The readdir_r and readdir64_r functions have been deprecated. It is
2110 recommended to use readdir and readdir64 instead.
2112 * The type âunion waitâ has been removed. It was deprecated in the early
2113 1990s and never part of POSIX. Application code should use the int type
2114 instead of âunion waitâ.
2116 * A new NSS action is added to facilitate large distributed system
2117 administration. The action, MERGE, allows remote user stores like LDAP
2118 to be merged into local user stores like /etc/groups in order to provide
2119 easy to use, updated, and managed sets of merged credentials. The new
2120 action can be used by configuring it in /etc/nsswitch.conf:
2121 group: files [SUCCESS=merge] nis
2122 Implemented by Stephen Gallagher (Red Hat).
2124 * The deprecated __malloc_initialize_hook variable has been removed from the
2127 * The long unused localedef --old-style option has been removed. It hasn't
2128 done anything in over 16 years. Scripts using this option can safely
2131 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
2132 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
2133 return the next representable value in the direction of positive infinity
2134 and the nextdown functions return the next representable value in the
2135 direction of negative infinity. These are currently enabled as GNU
2138 Security related changes:
2140 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
2141 could result in a stack overflow when getnetbyname was called with an
2142 overly long name. (CVE-2016-3075)
2144 * Previously, getaddrinfo copied large amounts of address data to the stack,
2145 even after the fix for CVE-2013-4458 has been applied, potentially
2146 resulting in a stack overflow. getaddrinfo now uses a heap allocation
2147 instead. Reported by Michael Petlan. (CVE-2016-3706)
2149 * The glob function suffered from a stack-based buffer overflow when it was
2150 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
2151 Reported by Alexander Cherepanov. (CVE-2016-1234)
2153 * The Sun RPC UDP client could exhaust all available stack space when
2154 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
2155 alloca plugin for GCC. (CVE-2016-4429)
2157 * The IPv6 name server management code in libresolv could result in a memory
2158 leak for each thread which is created, performs a failing naming lookup,
2159 and exits. Over time, this could result in a denial of service due to
2160 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
2162 The following bugs are resolved with this release:
2164 [1170] localedata: ne_NP: update Nepali locale definition file
2165 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
2167 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
2168 [6796] math: fdim() does not set errno on overflow
2169 [10354] libc: posix_spawn should use vfork() in more cases than presently
2170 [11213] localedata: localedata: add copyright disclaimer to locale files
2171 [12143] localedata: chr_US: new Cherokee locale
2172 [12450] localedata: sgs_LT: new locale
2173 [12676] localedata: ln_CD: new locale
2174 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
2176 [13304] math: fma, fmaf, fmal produce wrong results
2177 [14259] build: --localedir arg to configure is ignored
2178 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
2179 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
2180 [14934] localedata: es_CL: wrong first weekday chilean locale
2181 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
2183 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
2185 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
2186 [15368] nptl: raise() is not async-signal-safe
2187 [15479] math: ceil, floor, round and trunc raise inexact exception
2188 [15578] localedata: kk_KZ: various updates
2189 [16003] localedata: pap_AN: punt old locale
2190 [16137] localedata: iw_IL: punt old locale
2191 [16190] localedata: eo: new esperanto locale
2192 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
2193 [16742] malloc: race condition: pthread_atfork() called before first
2194 malloc() results in unexpected locking behaviour/deadlocks
2195 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
2197 [16983] localedata: postal_fmt does not allow %l and %n modifiers
2198 [17565] localedata: pt_PT: wrong (work-)week start
2199 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
2200 [17950] build: Build fails with -msse
2201 [18205] localedata: be_BY*: wrong first_weekday and first_workday
2202 [18433] libc: posix_spawn does not return correctly upon failure to
2204 [18453] localedata: charmaps/IBM875: incorrect codes
2205 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
2207 [18896] localedata: he_IL: improvements for currency
2208 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
2209 Romanian locale data
2210 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
2212 [19056] libc: Deprecate readdir_r
2213 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
2215 [19198] localedata: nl_NL: small improvements for Dutch locales
2216 [19257] network: Per-thread memory leak in __res_vinit with IPv6
2217 nameservers (CVE-2016-5417)
2218 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
2220 [19400] locale: Language missing in "iso-639.def", trivial fix in
2222 [19431] malloc: Deadlock between fflush, getdelim, and fork
2223 [19505] libc: Incorrect file descriptor validity checks in
2224 posix_spawn_file_actions_add{open,close,dup2}
2225 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
2226 when using RTLD_NEXT
2227 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
2228 `intl/{gettextP,loadinfo}.h'
2229 [19534] libc: execle, execlp may use malloc
2230 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
2231 [19573] network: res_nclose and __res_maybe_init disagree about name
2232 server initialization, breaking Hesiod
2233 [19575] localedata: Status of GB18030 tables
2234 [19581] localedata: sr_* date_fmt string contains additional newline
2235 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
2237 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
2238 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
2239 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
2240 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
2242 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
2244 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
2246 [19610] dynamic-link: ldconfig -X removes stale symbolic links
2247 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
2248 [19633] locale: strfmon_l applies global locale to number formatting
2249 [19642] network: Memory leak in getnameinfo
2250 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
2251 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
2253 [19654] math: [x86_64] Need testcase for BZ #19590 fix
2254 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
2256 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
2257 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
2259 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
2261 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
2263 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
2264 pointers and lengths in error-case.
2265 [19727] locale: Converting from/to UTF-xx with iconv() does not always
2266 report errors on UTF-16 surrogates values.
2267 [19755] nscd: nscd assertion failure in gc
2268 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
2269 [19759] libc: mempcpy shouldn't be inlined
2270 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
2271 [19765] libc: s390 needs an optimized mempcpy
2272 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
2273 NAME_MAX limit assumption (CVE-2016-1234)
2274 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
2275 [19787] network: Missing and incorrect truncation checks in getnameinfo
2276 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
2278 [19791] network: Assertion failure in res_query.c with un-connectable name
2280 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
2281 [19822] math: libm.so install clobbers old version
2282 [19825] network: resolv: send_vc can return uninitialized data in second
2283 response to getaddrinfo
2284 [19830] network: nss_dns: should check RDATA length against buffer length
2285 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
2286 confronted with A/AAAA records of invalid size
2287 [19837] nss: nss_db: No retries for some long lines with a larger buffer
2288 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
2289 [19853] stdio: Printing IBM long double in decimal with high precision is
2291 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
2292 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
2293 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
2295 [19865] network: Assertion failure or memory leak in
2296 _nss_dns_getcanonname_r
2297 [19868] network: nss_dns: netent code does not skip over non-PTR records
2298 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
2300 [19881] string: Improve x86-64 memset
2301 [19907] string: Incorrect memcpy tests
2302 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
2304 [19925] libc: termios.h XCASE namespace
2305 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
2306 [19929] libc: limits.h NL_NMAX namespace
2307 [19931] stdio: Memory leak in vfprintf
2308 [19957] libc: clone(CLONE_VM) access invalid parent memory
2309 [19963] localedata: en_IL: New locale
2310 [19989] stdio: stdio.h cuserid namespace
2311 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
2313 [19996] locale: langinfo.h nl_langinfo_l namespace
2314 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
2315 [20010] network: getaddrinfo: Stack overflow in hostent translation
2317 [20012] stdio: libio: fmemopen append mode failure
2318 [20014] stdio: stdio.h namespace for pre-threads POSIX
2319 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
2320 [20023] libc: fcntl.h timespec namespace
2321 [20024] math: [x86_64] vectorized sincos trashes the stack
2322 [20031] network: nss_hesiod: Heap overflow in get_txt_records
2323 [20041] time: sys/time.h timespec namespace
2324 [20043] libc: unistd.h missing cuserid for UNIX98 and before
2325 [20044] libc: unistd.h missing pthread_atfork for UNIX98
2326 [20051] libc: ttyslot in wrong header under wrong conditions
2327 [20054] libc: gethostname not declared for XPG4
2328 [20055] libc: termios.h missing tcgetsid for XPG4
2329 [20072] dynamic-link: x86 init_cpu_features is called twice in static
2331 [20073] libc: sys/stat.h fchmod namespace
2332 [20074] libc: stdlib.h rand_r namespace
2333 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
2334 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
2336 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
2337 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
2339 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
2340 [20119] libc: Wrong mask for processors level type from CPUID
2341 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
2342 AS not supporting AVX512
2343 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
2345 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
2346 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
2348 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
2349 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
2350 [20178] libc: posix_spawn{p} should not call exit
2351 [20191] stdio: libio: vtables hardening
2352 [20195] string: FMA4 detection requires CPUID execution with register
2354 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
2355 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
2357 [20212] math: acos (sNaN) returns sNaN
2358 [20213] math: asin (sNaN) returns sNaN
2359 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
2360 [20218] math: [i386] asinhl (sNaN) returns sNaN
2361 [20219] math: [i386] atanhl (sNaN) returns sNaN
2362 [20222] stdio: fopencookie: Mangle function pointers
2363 [20224] math: [i386] cbrtl (sNaN) returns sNaN
2364 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
2365 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
2367 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
2368 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
2369 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
2370 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
2371 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
2372 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
2373 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
2374 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
2375 [20240] math: modf (sNaN) returns sNaN
2376 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
2377 [20250] math: frexp (sNaN) returns sNaN
2378 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
2379 [20255] math: [i386] fdim, fdimf return with excess range and precision /
2381 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
2382 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
2383 subscript is below array bounds [-Werror=array-bounds]
2384 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
2385 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
2387 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
2388 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
2390 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
2391 "invalid" exceptions
2392 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
2393 [20316] localedata: id_ID: Februari instead of Pebruari
2394 [20327] string: POWER8 strcasecmp returns incorrect result
2395 [20347] math: Failure: Test: j0_downward (0xap+0)
2396 [20348] libc: FAIL: misc/tst-preadvwritev64
2397 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
2398 [20350] libc: There is no test for p{read,write}64
2399 [20357] math: Incorrect cos result for 1.5174239687223976
2400 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
2404 * Unicode 8.0.0 Support: Character encoding, character type info, and
2405 transliteration tables are all updated to Unicode 8.0.0, using new
2406 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
2407 These updates cause user visible changes, such as the fixes for bugs
2408 89, 16061, and 18568.
2410 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
2411 kernel-internal CPU set size. This means that requests that change the
2412 CPU affinity which failed before (for example, an all-ones CPU mask) will
2413 now succeed. Applications that need to determine the effective CPU
2414 affinities need to call sched_getaffinity or pthread_getaffinity_np after
2415 setting it because the kernel can adjust it (and the previous size check
2416 would not detect this in the majority of cases).
2418 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
2419 the following new symbols are used: fts64_children, fts64_close,
2420 fts64_open, fts64_read and fts64_set.
2422 * getaddrinfo now detects certain invalid responses on an internal netlink
2423 socket. If such responses are received, an affected process will
2424 terminate with an error message of "Unexpected error <number> on netlink
2425 descriptor <number>" or "Unexpected netlink response of size <number> on
2426 descriptor <number>". The most likely cause for these errors is a
2427 multi-threaded application which erroneously closes and reuses the netlink
2428 file descriptor while it is used by getaddrinfo.
2430 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
2431 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
2432 unnecessary serialization of memory allocation requests across threads.
2433 The defect is now corrected. Users should see a substantial increase in
2434 the concurent throughput of allocation requests for applications which
2435 trigger this bug. Affected applications typically create and
2436 destroy threads frequently. (Bug 19048 was reported and analyzed by
2439 * There is now a --disable-timezone-tools configure option for disabling the
2440 building and installing of the timezone related utilities (zic, zdump, and
2441 tzselect). This is useful for people who build the timezone data and code
2442 independent of the GNU C Library.
2444 * The obsolete header <regexp.h> has been removed. Programs that require
2445 this header must be updated to use <regex.h> instead.
2447 * The obsolete functions bdflush, create_module, get_kernel_syms,
2448 query_module and uselib are no longer available to newly linked binaries;
2449 the header <sys/kdaemon.h> has been removed. These functions and header
2450 were specific to systems using the Linux kernel and could not usefully be
2451 used with the GNU C Library on systems with version 2.6 or later of the
2454 * Optimized string, wcsmbs and memory functions for IBM z13.
2455 Implemented by Stefan Liebler.
2457 * Newly linked programs that define a variable called signgam will no longer
2458 have it set by the lgamma, lgammaf and lgammal functions. Programs that
2459 require signgam to be set by those functions must ensure that they use the
2460 variable provided by the GNU C Library and declared in <math.h>, without
2461 defining their own copy.
2463 * The minimum GCC version that can be used to build this version of the GNU
2464 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
2465 still be used to compile programs using the GNU C Library.
2467 Security related changes:
2469 * An out-of-bounds value in a broken-out struct tm argument to strftime no
2470 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
2472 * The LD_POINTER_GUARD environment variable can no longer be used to disable
2473 the pointer guard feature. It is always enabled. Previously,
2474 LD_POINTER_GUARD could be used to disable security hardening in binaries
2475 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
2478 * An integer overflow in hcreate and hcreate_r could lead to an
2479 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
2481 * The catopen function no longer has unbounded stack usage. Reported by
2482 Max. (CVE-2015-8779)
2484 * The nan, nanf and nanl functions no longer have unbounded stack usage
2485 depending on the length of the string passed as an argument to the
2486 functions. Reported by Joseph Myers. (CVE-2014-9761)
2488 * A stack-based buffer overflow was found in libresolv when invoked from
2489 libnss_dns, allowing specially crafted DNS responses to seize control
2490 of execution flow in the DNS client. The buffer overflow occurs in
2491 the functions send_dg (send datagram) and send_vc (send TCP) for the
2492 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
2493 family. The use of AF_UNSPEC triggers the low-level resolver code to
2494 send out two parallel queries for A and AAAA. A mismanagement of the
2495 buffers used for those queries could result in the response of a query
2496 writing beyond the alloca allocated buffer created by
2497 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2498 the overflow. Thanks to the Google Security Team and Red Hat for
2499 reporting the security impact of this issue, and Robert Holiday of
2500 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2502 The following bugs are resolved with this release:
2504 [89] localedata: Locales nb_NO and nn_NO should transliterate ÊÞÄ
2505 [887] math: Math library function "logb" and "nextafter" inconsistent
2506 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2507 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2508 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2509 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2511 [4404] localedata: German translation of "Alarm clock" is misleading
2512 [6799] math: nextafter() and nexttoward() doen't set errno on
2513 overflow/underflow errors
2514 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2516 [10432] nis: _nss_nis_setnetgrent assertion failure
2517 [11460] libc: fts has no LFS support
2518 [12926] network: getaddrinfo()/make_request() may spin forever
2519 [13065] nptl: Race condition in pthread barriers
2520 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2521 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2523 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2524 [14912] libc: Rename non-installed bits/*.h headers
2525 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2526 [15367] math: Let gcc use __builtin_isinf
2527 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2528 [15421] math: lgamma wrongly sets signgam for ISO C
2529 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2530 FE_INVALID with argument out of range
2531 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2533 [15786] dynamic-link: ifunc resolver functions can smash function
2535 [15918] math: Unnecessary check for equality in hypotf()
2536 [16061] localedata: Review / update transliteration data
2537 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2539 [16141] time: strptime %z offset restriction
2540 [16171] math: drem should be alias of remainder
2541 [16296] math: fegetround is pure?
2542 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2543 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2545 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2546 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2548 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2549 "Exception "Inexact" set" on ppc32
2550 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2551 [16517] math: Missing underflow exception from tanf/tan/tanl
2552 [16519] math: Missing underflow exception from sinhf
2553 [16520] math: Missing underflow exception from tanhf
2554 [16521] math: Missing underflow exception from exp2
2555 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2557 [16734] stdio: fopen calls mmap to allocate its buffer
2558 [16961] math: nan function incorrect handling of bad sequences
2559 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2560 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2561 [16985] locale: localedef: confusing error message when opening output
2563 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2564 [17197] locale: Redundant shift character in iconv conversion output at
2566 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2567 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2568 [17250] dynamic-link: static linking breaks nss loading
2569 (getaddrinfo/getpwnam/etc...)
2570 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2572 [17441] math: isnan() should use __builtin_isnan() in GCC
2573 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2574 (related to lock elision)
2575 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2576 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2577 [17887] time: strptime should be able to parse "+01:00" style timezones
2578 [17905] libc: catopen() Multiple unbounded stack allocations
2580 [18084] libc: backtrace (..., 0) dumps core on x86
2581 [18086] libc: nice() sets errno to 0 on success
2582 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2583 is too large (CVE-2015-8778)
2584 [18251] dynamic-link: SONAME missing when audit modules provides path
2585 [18265] libc: add attributes for wchar string and memory functions
2586 [18370] math: csqrt missing underflows
2587 [18421] libc: [hppa] read-only segment has dynamic relocations
2588 [18472] libc: Obsolete syscall wrappers should be compat symbols
2589 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2590 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2591 [18525] localedata: Remove locale timezone information
2592 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2593 [18568] localedata: Update locale data to Unicode 8.0
2594 [18589] locale: sort-test.sh fails at random
2595 [18595] math: ctan, ctanh missing underflows
2596 [18604] libc: assert macro-expands its argument
2597 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2598 contains a vector instruction exception.
2599 [18611] math: j1, jn missing errno setting on underflow
2600 [18618] localedata: sync Chechen locale definitions with other *_RU
2602 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2603 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2604 [18665] network: In send_dg, the recvfrom function is NOT always using the
2605 buffer size of a newly created buffer (CVE-2015-7547)
2606 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2608 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2610 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2611 [18699] math: tilegx cproj() for various complex infinities does not yield
2613 [18724] libc: Harden put*ent functions against data injection
2614 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2615 [18755] build: build errors with -DNDEBUG
2616 [18757] stdio: fmemopen fails to set errno on failure
2617 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2619 [18781] libc: openat64 lacks O_LARGEFILE
2620 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2621 error: canât find a register in class âR1_REGSâ while reloading âasmâ
2622 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2623 [18790] math: [ldbl-128ibm] tanhl inaccurate
2624 [18795] libc: stpncpy fortification misses buffer lengths that are
2625 statically too large
2626 [18796] build: build fails for --disable-mathvec
2627 [18803] math: hypot missing underflows
2628 [18820] stdio: fmemopen may leak memory on failure
2629 [18823] math: csqrt spurious underflows
2630 [18824] math: fma spurious underflows
2631 [18825] math: pow missing underflows
2632 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2633 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2634 [18870] build: sem_open.c fails to compile with missing symbol
2636 [18872] stdio: Fix memory leak in printf_positional
2637 [18873] libc: posix_fallocate overflow check ineffective
2638 [18875] math: Excess precision leads incorrect libm
2639 [18877] libc: arm: mmap offset regression
2640 [18887] libc: memory corruption when using getmntent on blank lines
2641 [18918] localedata: hu_HU: change time to HH:MM:SS format
2642 [18921] libc: Regression: extraneous stat() and fstat() performed by
2644 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2645 binaries (CVE-2015-8777)
2646 [18951] math: tgamma missing underflows
2647 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2649 [18953] localedata: lt_LT: change currency symbol to the euro
2650 [18956] math: powf inaccuracy
2651 [18961] math: [i386] exp missing underflows
2652 [18966] math: [i386] exp10 missing underflows
2653 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2654 [18969] build: multiple string test failures due to missing locale
2656 [18970] libc: Reference of pthread_setcancelstate in libc.a
2657 [18977] math: float / long double Bessel functions not in XSI POSIX
2658 [18980] math: i386 libm functions return with excess range and precision
2659 [18981] math: i386 scalb*, ldexp return with excess range and precision
2660 [18982] stdio: va_list and vprintf
2661 [18985] time: Passing out of range data to strftime() causes a segfault
2663 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2664 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2665 [19012] locale: iconv_open leaks memory on error path
2666 [19016] math: clog, clog10 inaccuracy
2667 [19018] nptl: Mangle function pointers in tls_dtor_list
2668 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2669 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2670 [19048] malloc: malloc: arena free list can become cyclic, increasing
2672 [19049] math: [powerpc] erfc incorrect zero sign
2673 [19050] math: [powerpc] log* incorrect zero sign
2674 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2675 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2676 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2677 [19074] network: Data race in _res_hconf_reorder_addrs
2678 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2679 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2680 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2682 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2684 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2685 [19086] manual: posix_fallocate64 documented argument order is wrong.
2686 [19088] math: lround, llround missing exceptions close to overflow
2688 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2689 [19095] math: dbl-64 lrint incorrect for 64-bit long
2690 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2691 [19124] dynamic-link: ld.so failed to build with older assmebler
2692 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2693 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2694 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2695 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2696 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2697 pthread_setaffinity_np
2698 [19156] math: [ldbl-128] j0l spurious underflows
2699 [19164] nptl: tst-getcpu fails with many possible CPUs
2700 [19168] math: math/test-ildoubl and math/test-ldouble failure
2701 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2702 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2704 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2705 (FE_NOMASK_ENV) do not clear SSE exceptions
2706 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2707 _int_new_arena/reused_arena
2708 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2709 [19201] math: dbl-64 remainder incorrect sign of zero result
2710 [19205] math: bits/math-finite.h conditions do not match math.h and
2712 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2713 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2714 for C99-based standards
2715 [19212] libc: features.h not -Wundef clean
2716 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2718 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2719 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2720 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2722 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2723 "inexact" exceptions
2724 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2726 [19242] libc: strtol incorrect in Turkish locales
2727 [19243] malloc: reused_arena can pick an arena on the free list, leading
2728 to an assertion failure and reference count corruption
2729 [19253] time: tzset() ineffective when temporary TZ did not include DST
2731 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2732 [19270] math: [hppa] Shared libm missing __isnanl
2733 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2734 MAP_HUGETLB and MAP_STACK defines
2735 [19313] nptl: Wrong __cpu_mask for x32
2736 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2737 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2738 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2739 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2740 [19363] time: x32: times() return value wrongly truncates/sign extends
2742 [19367] dynamic-link: Improve branch prediction on Silvermont
2743 [19369] network: Default domain name not reset by res_ninit when "search"
2744 / "domain" entry is removed from resolv.conf
2745 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2747 [19385] localedata: bg_BG: time separator should be colon, not comma
2748 [19408] libc: linux personality syscall wrapper may erroneously return an
2749 error on 32-bit architectures
2750 [19415] libc: dladdr returns wrong names on hppa
2751 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2752 IBM905, IBM907, and IBM909
2753 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2754 [19443] build: build failures with -DDEBUG
2755 [19451] build: Make check fails on test-double-vlen2
2756 [19462] libc: Glibc failed to build with -Os
2757 [19465] math: Wrong code with -Os
2758 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2760 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2762 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2763 [19486] math: S390: Math tests fail with "Exception Inexact set".
2764 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2765 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2767 [19590] math: Fail to build shared objects that use libmvec.so functions.
2771 * The following bugs are resolved with this release:
2773 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2774 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2775 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2776 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2777 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2778 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2779 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2780 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2781 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2782 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2783 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2784 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2785 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2786 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2787 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2788 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2789 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2790 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2791 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2792 18657, 18676, 18694, 18696, 18887.
2794 * Cache information can be queried via sysconf() function on s390 e.g. with
2795 _SC_LEVEL1_ICACHE_SIZE as argument.
2797 * A buffer overflow in gethostbyname_r and related functions performing DNS
2798 requests has been fixed. If the NSS functions were called with a
2799 misaligned buffer, the buffer length change due to pointer alignment was
2800 not taken into account. This could result in application crashes or,
2801 potentially arbitrary code execution, using crafted, but syntactically
2802 valid DNS responses. (CVE-2015-1781)
2804 * The time zone file parser has been made more robust against crafted time
2805 zone files, avoiding heap buffer overflows related to the processing of
2806 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2807 large time zone data files. Overly long time zone specifiers in the TZ
2808 variable no longer result in stack overflows and crashes.
2810 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2811 for LD and GD on x86 and x86-64, has been implemented. You will need
2812 binutils-2.24 or later to enable this optimization.
2814 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2815 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2816 Hat). These updates cause user visible changes, such as the fix for bug
2819 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2820 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2821 condition in some applications.
2823 * Added vector math library named libmvec with the following vectorized x86_64
2824 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2826 The library can be disabled with --disable-mathvec. Use of the functions is
2827 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2828 Shared library libmvec.so is linked in as needed when using -lm (no need to
2829 specify -lmvec explicitly for not static builds).
2830 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2832 * A new fmemopen implementation has been added with the goal of POSIX
2833 compliance. The new implementation fixes the following long-standing
2834 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2835 old implementation is still present for use be by existing binaries.
2837 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2838 releases. It has been fixed to match 2.19 and older, but binaries built
2839 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2841 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2842 Contributed by Roland McGrath (Google).
2844 * The header <regexp.h> is deprecated, and will be removed in a future
2845 release. Use of this header will trigger a deprecation warning.
2846 Application developers should update their code to use <regex.h> instead.
2848 This header was formerly part of SUS, but was deprecated in 1994 and
2849 removed from the standard in 2001. Also, the glibc implementation
2850 leaks memory. See BZ#18681 for more details.
2854 * The following bugs are resolved with this release:
2856 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2857 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2858 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2859 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2860 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2861 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2862 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2863 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2864 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2865 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2868 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2869 too little memory for the to-be-scanned arguments and overflow the
2870 allocated buffer. The implementation now correctly computes the required
2871 buffer size when using malloc, and switches to malloc from alloca as
2874 * A new semaphore algorithm has been implemented in generic C code for all
2875 machines. Previous custom assembly implementations of semaphore were
2876 difficult to reason about or ensure that they were safe. The new version
2877 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2878 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2879 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2881 * Port to Altera Nios II has been contributed by Mentor Graphics.
2883 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2884 implementations for powerpc64/powerpc64le.
2885 Implemented by Adhemerval Zanella (IBM).
2887 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2888 and powerpc64le. This may improve lock scaling of existing programs on
2889 HTM capable systems. The lock elision code is only enabled with
2890 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2891 powerpc will issue a transaction abort on every syscall to avoid side
2892 effects being visible outside transactions.
2894 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2895 AArch64. Contributed by ARM Ltd.
2897 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2899 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2900 under certain input conditions resulting in the execution of a shell for
2901 command substitution when the application did not request it. The
2902 implementation now checks WRDE_NOCMD immediately before executing the
2903 shell and returns the error WRDE_CMDSUB as expected.
2905 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2906 processing format strings with a large number of format specifiers.
2908 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2909 infinite loop if the DNS response contained a PTR record of an unexpected
2912 * The minimum GCC version that can be used to build this version of the GNU
2913 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2914 still be used to compile programs using the GNU C Library.
2916 * The GNU C Library is now built with -Werror by default. This can be
2917 disabled by configuring with --disable-werror.
2919 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2921 * The obsolete sigvec function has been removed. This was the original
2922 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2923 programs have been using instead for about 25 years. Of course, ABI
2924 compatibility for old binaries using sigvec remains intact.
2926 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2927 with newer versions of bison.
2929 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2930 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2931 registers overlay two consecutive single-precision registers. MIPS32R2
2932 introduced a new FPU mode (FR=1) where double-precision registers extend the
2933 corresponding single-precision registers which is incompatible with the
2934 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2935 require the use of FR=1 making a transition necessary. New o32 ABI
2936 extensions enable users to migrate over time from the original o32 ABI
2937 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2938 tracks the ABI of any loaded object and verifies that new objects are
2939 compatible. Mode transitions will also be requested as required and
2940 unsupportable objects will be rejected. The ABI checks include both soft and
2941 hard float ABIs for o32, n32 and n64.
2943 GCC 5 with GNU binutils 2.25 onwards:
2944 It is strongly recommended that all o32 system libraries are built using the
2945 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2946 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2947 compiler using --with-fp-32=xx to set this by default.
2951 * The following bugs are resolved with this release:
2953 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2954 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2955 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2956 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2957 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2958 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2959 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2960 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2961 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2962 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2963 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2964 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2965 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2966 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2967 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2969 * Reverted change of ABI data structures for s390 and s390x:
2970 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2971 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2972 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
2973 are preserved pointing straight to the same implementation as the old ones.
2974 Given that, new callers will simply provide a too-big buffer to these
2975 functions. Any applications/libraries out there that embed jmp_buf or
2976 ucontext_t in an ABI-relevant data structure that have already been rebuilt
2977 against 2.19 headers will have to rebuilt again. This is necessary in any
2978 case to revert the breakage in their ABI caused by the glibc change.
2980 * Support for file description locks is added to systems running the
2981 Linux kernel. The standard file locking interfaces are extended to
2982 operate on file descriptions, not file descriptors, via the use of
2983 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
2984 are associated with an open file instead of a process.
2986 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
2988 * The minimum Linux kernel version that this version of the GNU C Library
2989 can be used with is 2.6.32.
2991 * Running the testsuite no longer terminates as soon as a test fails.
2992 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
2993 with PASS or FAIL lines for individual tests. A summary of the results is
2994 printed, including a list of failing lists, and "make check" exits with
2995 error status if there were any unexpected failures. "make check
2996 stop-on-test-failure=y" may be used to keep the old behavior.
2998 * The am33 port, which had not worked for several years, has been removed
3001 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
3002 supported; they now act the same as _DEFAULT_SOURCE (but generate a
3003 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
3004 conflicted with POSIX (support for which was removed in 2.19), the
3005 interfaces those macros enabled remain available when compiling with
3006 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
3007 test macros defined.
3009 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
3011 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
3012 This may improve lock scaling of existing programs on TX capable systems.
3013 The lock elision code is only built with --enable-lock-elision=yes and
3014 then requires a GCC version supporting the TX builtins. With lock elision
3015 default mutexes are elided via __builtin_tbegin, if the cpu supports
3016 transactions. By default lock elision is not enabled and the elision code
3019 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
3020 copy the path argument. This allowed programs to cause posix_spawn to
3021 deference a dangling pointer, or use an unexpected pathname argument if
3022 the string was modified after the posix_spawn_file_actions_addopen
3025 * All supported architectures now use the main glibc sysdeps directory
3026 instead of some being in a separate "ports" directory (which was
3027 distributed separately before glibc 2.17).
3029 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
3030 On configurations that support it (all Linux configurations), it's now
3031 used regardless of the --enable-add-ons switch to configure. It is no
3032 longer possible to build such configurations without pthreads support.
3034 * Locale names, including those obtained from environment variables (LANG
3035 and the LC_* variables), are more tightly checked for proper syntax.
3036 setlocale will now fail (with EINVAL) for locale names that are overly
3037 long, contain slashes without starting with a slash, or contain ".." path
3038 components. (CVE-2014-0475) Previously, some valid locale names were
3039 silently replaced with the "C" locale when running in AT_SECURE mode
3040 (e.g., in a SUID program). This is no longer necessary because of the
3043 * On x86-64, the dynamic linker's lazy-binding support is now compatible
3044 with application code using Intel MPX instructions. (With all previous
3045 versions, the MPX register state could be clobbered when making calls
3046 into or out of a shared library.) Note that while the new dynamic
3047 linker is compatible with all known x86 hardware whether or not it
3048 supports Intel MPX, some x86 instruction-set emulators might fail to
3049 handle the new instruction encodings. This is known to affect Valgrind
3050 versions up through 3.9 (but will be fixed in the forthcoming 3.10
3051 release), and might affect other tools that do instruction emulation.
3053 * Support for loadable gconv transliteration modules has been removed.
3054 The support for transliteration modules has been non-functional for
3055 over a decade, and the removal is prompted by security defects. The
3056 normal gconv conversion modules are still supported. Transliteration
3057 with //TRANSLIT is still possible, and the //IGNORE specifier
3058 continues to be supported. (CVE-2014-5119)
3060 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
3061 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
3062 resulting a denial-of-service security vulnerability in applications which
3063 use functions related to iconv. (CVE-2014-6040)
3067 * The following bugs are resolved with this release:
3069 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
3070 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
3071 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
3072 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
3073 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
3074 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
3075 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
3076 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
3077 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
3078 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
3079 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
3080 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
3081 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
3082 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
3083 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
3084 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
3085 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
3086 16431, 16453, 16474, 16506, 16510, 16529
3088 * Slovenian translations for glibc messages have been contributed by the
3089 Translation Project's Slovenian team of translators.
3091 * The public headers no longer use __unused nor __block. This change is to
3092 support compiling programs that are derived from BSD sources and use
3093 __unused internally, and to support compiling with Clang's -fblock
3094 extension which uses __block.
3096 * CVE-2012-4412 The strcoll implementation caches indices and rules for
3097 large collation sequences to optimize multiple passes. This cache
3098 computation may overflow for large collation sequences and may cause a
3099 stack or buffer overflow. This is now fixed to use a slower algorithm
3100 which does not use a cache if there is an integer overflow.
3102 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
3103 rules for large collation sequences to optimize multiple passes and falls
3104 back to alloca if malloc fails, resulting in a possible stack overflow.
3105 The implementation now falls back to an uncached collation sequence lookup
3108 * CVE-2013-4788 The pointer guard used for pointer mangling was not
3109 initialized for static applications resulting in the security feature
3110 being disabled. The pointer guard is now correctly initialized to a
3111 random value for static applications. Existing static applications need
3112 to be recompiled to take advantage of the fix (bug 15754).
3114 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
3115 to the d_name member of struct dirent, or omit the terminating NUL
3116 character. (Bugzilla #14699).
3118 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
3119 aligned_alloc functions could allocate too few bytes or corrupt the
3120 heap when passed very large allocation size values (Bugzilla #15855,
3123 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
3124 for AF_INET6 has been fixed (Bugzilla #16072).
3126 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
3127 pap_CW, quz_PE, the_NP.
3129 * Substantially revised locales: gd_GB, ht_HT
3131 * The LC_ADDRESS field was updated to support country_car for almost all
3134 * ISO 1427 definitions were updated.
3136 * ISO 3166 definitions were updated.
3138 * The localedef utility now supports --big-endian and --little-endian
3139 command-line options to generate locales for a different system from that
3140 for which the C library was built.
3142 * Binary locale files now only depend on the endianness of the system for
3143 which they are generated and not on other properties of that system. As a
3144 consequence, binary files generated with new localedef may be incompatible
3145 with old versions of the GNU C Library, and binary files generated with
3146 old localedef may be incompatible with this version of the GNU C Library,
3147 in the following circumstances:
3149 + Locale files may be incompatible on m68k systems.
3151 + Locale archive files (but not separate files for individual locales) may
3152 be incompatible on systems where plain "char" is signed.
3154 * The configure option --disable-versioning has been removed. Builds with
3155 --disable-versioning had not worked for several years.
3157 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
3158 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
3160 * SystemTap probes for malloc have been introduced.
3162 * SystemTap probes for slow multiple precision fallback paths of
3163 transcendental functions have been introduced.
3165 * Support for powerpc64le has been added.
3167 * The soft-float powerpc port now supports e500 processors.
3169 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
3171 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
3172 set of header declarations that are enabled by default, even when other
3173 feature test macros or compiler options such as -std=c99 would otherwise
3174 disable some of those declarations.
3176 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
3177 conflict with POSIX. The libbsd-compat library (which was a dummy library
3178 that did nothing) has also been removed.
3180 * Preliminary documentation about Multi-Thread, Async-Signal and
3181 Async-Cancel Safety has been added.
3183 * Change of ABI data structures for s390 and s390x:
3184 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
3185 allow for future hardware extensions. All library functions that accept or
3186 return these structures were versioned in order to provide backwards
3187 compatibility with existing code. However, not all cases can be handled
3188 with interface versioning. If an application embeds either structure into
3189 another structure and that structure is passed to another compilation unit
3190 which expects the newer larger-sized object then any access to the new
3191 fields will result in undefined behaviour. Similarly any access to fields
3192 that were moved by the enlarging of the structures will cause undefined
3193 behaviour. To fix the undefined behaviour all objects that are part of the
3194 final in-memory image must agree on the size of structures, and this may
3195 require recompilation.
3199 * The following bugs are resolved with this release:
3201 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
3202 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
3203 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
3204 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
3205 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
3206 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
3207 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
3208 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
3209 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
3210 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
3211 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
3212 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
3213 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
3216 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
3217 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
3218 Distributions can re-enable building and using pt_chown via the new configure
3219 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
3220 considerable security risks and should only be used if the distribution
3221 understands and accepts the risks.
3223 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
3226 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
3227 fixed (Bugzilla #15330).
3229 * Add support for calling C++11 thread_local object destructors on thread
3230 and program exit. This needs compiler support for offloading C++11
3231 destructor calls to glibc.
3233 * Improved worst case performance of libm functions with double inputs and
3236 * Support for priority inherited mutexes in pthread condition variables on
3237 non-x86 architectures.
3239 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
3241 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
3243 * Optimized string functions for ARM. Implemented by Will Newton and
3246 * Optimized libm functions for SPARC. Implemented by David S. Miller.
3248 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
3251 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
3252 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
3254 * Added a benchmark framework to track performance of functions in glibc.
3256 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
3257 It is based on draft TS 18661 and currently enabled as a GNU extension.
3259 * On Linux, the clock function now uses the clock_gettime system call
3260 for improved precision, rather than old times system call.
3262 * Added support for version-3 tz format files. This is needed when using
3263 the tz database release 2013e or later, and affects a few unusual cases --
3264 currently only TZ='America/Godthab' for time stamps after 2037.
3266 * Added new API functions pthread_getattr_default_np and
3267 pthread_setattr_default_np to get and set the default pthread
3268 attributes of a process.
3270 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
3271 This may improve lock scaling of existing programs on TSX capable systems.
3272 When the --enable-lock-elision=yes parameter is specified at configure
3273 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
3276 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
3277 availability). Implemented by Ryan S. Arnold.
3279 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
3283 * The following bugs are resolved with this release:
3285 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
3286 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
3287 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
3288 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
3289 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
3290 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
3291 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
3292 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
3293 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
3294 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
3295 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
3296 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
3297 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
3298 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
3299 14879, 14889, 14893, 14898, 14914.
3301 * Optimization of memcpy for MIPS.
3303 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
3304 EMFILE has been fixed (Bugzilla #14889).
3306 * The add-on ports collection is now distributed in the "ports" subdirectory
3307 of the main GNU C Library distribution, rather than separately.
3309 * Port to ARM AArch64 contributed by Linaro.
3311 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
3312 Optimized versions of memcpy, memset, and memcmp added for System z10 and
3314 Implemented by Andreas Krebbel.
3316 * The new function secure_getenv allows secure access to the environment,
3317 returning NULL if running in a SUID/SGID process. This function replaces
3318 the internal function __secure_getenv.
3320 * SystemTap static probes have been added into the dynamic linker.
3321 Implemented by Gary Benson.
3323 * Optimizations of string functions strstr, strcasestr and memmem.
3324 Implemented by Maxim Kuvyrkov.
3326 * The minimum Linux kernel version that this version of the GNU C Library
3327 can be used with is 2.6.16.
3329 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
3330 powerpc POWER7. Implemented by Will Schmidt.
3332 * New configure option --disable-nscd builds the C library such that it
3333 never attempts to contact the Name Service Caching Daemon (nscd).
3334 New configure option --disable-build-nscd avoids building nscd itself;
3335 this is the default if --disable-nscd is used.
3337 * Improved support for cross-compilation, including cross-testing and
3338 bootstrap builds without a previously built glibc.
3340 * Several testsuite tests are now able to test multiple IFUNC variants of an
3341 interface, rather than just testing the one that would be chooen by
3344 * New configure options --with-bugurl and --with-pkgversion, for
3345 distributors to use to embed their bug-reporting and package version
3346 information in --help and --version output.
3348 * The ttyname and ttyname_r functions on Linux now fall back to searching for
3349 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
3350 allows creation of chroots without the procfs mounted on /proc.
3352 * The `crypt' function now fails if passed salt bytes that violate the
3353 specification for those values. On Linux, the `crypt' function will
3354 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
3355 enabled, and fail on encrypted strings using the MD5 or DES algorithm
3356 when the mode is enabled.
3358 * The `clock_*' suite of functions (declared in <time.h>) is now available
3359 directly in the main C library. Previously it was necessary to link with
3360 -lrt to use these functions. This change has the effect that a
3361 single-threaded program that uses a function such as `clock_gettime' (and
3362 is not linked with -lrt) will no longer implicitly load the pthreads
3363 library at runtime and so will not suffer the overheads associated with
3364 multi-thread support in other code such as the C++ runtime library.
3366 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
3371 * The following bugs are resolved with this release:
3373 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
3374 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
3375 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
3376 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
3377 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
3378 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
3379 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
3380 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
3381 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
3382 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
3383 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
3384 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
3385 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
3386 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
3387 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
3388 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
3389 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
3390 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
3391 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
3392 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
3393 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
3394 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
3397 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
3398 configuring glibc with:
3399 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
3400 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
3401 Implemented by H.J. Lu.
3405 + define static_assert
3407 + do not declare gets
3409 + declare at_quick_exit and quick_exit also for ISO C11
3411 + aligned_alloc. NB: The code is deliberately allows the size parameter
3412 to not be a multiple of the alignment. This is a moronic requirement
3413 in the standard but it is only a requirement on the caller, not the
3416 + timespec_get added
3418 + uchar.h support added
3420 + CMPLX, CMPLXF, CMPLXL added
3422 Implemented by Ulrich Drepper.
3424 * Support for the IA-64 has been moved to ports.
3426 * Remove support for anything but ELF binary format
3428 * Checking versions of poll, ppoll added.
3429 Implemented by Ulrich Drepper.
3431 * More generic and 64-bit performance optimizations to math functions.
3432 Implemented by Ulrich Drepper.
3434 * New configure option --enable-obsolete-rpc makes the deprecated RPC
3435 headers and functions available at compile time as they were before
3436 version 2.14. This option will be removed at some time in the future
3437 after the TI-RPC library becomes fully sufficient for the needs of
3438 existing applications.
3440 * Compatibility code for Linux kernel versions before 2.4 has been removed.
3441 Note that glibc is not expected to work with any Linux kernel version
3444 * New header <sys/auxv.h> and function getauxval allowing easy access to
3445 the AT_* key-value pairs passed from the Linux kernel. The header also
3446 defines the HWCAP_* bits associated with the AT_HWCAP key.
3448 * New locales: mag_IN
3450 * New configure option --enable-systemtap builds SystemTap static probes
3451 into libc for setjmp and longjmp and into libpthread for various operations.
3452 So far the setjmp/longjmp probes and some of the libpthread probes are
3453 provided only for i*86 and x86_64.
3454 Implemented by Roland McGrath and Rayson Ho.
3456 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
3458 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
3461 * More optimized functions for SPARC. Implemented by David S. Miller.
3463 * Improved support for cross-compilation, especially bootstrap builds
3464 without a previously built glibc.
3466 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
3467 Chris Metcalf from Tilera.
3469 * Support for the old ARM ABI has been removed from ports. Only the EABI is
3470 now supported for ARM processors.
3472 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
3473 as the name of the dynamic linker, to distinguish it from the
3474 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
3476 * Support for CRIS has been removed from ports.
3478 * A new class of installed header has been documented for low-level
3479 platform-specific functionality. PowerPC added the first instance with a
3480 function to provide time base register access. Contributed by Tulio
3481 Magno Quites Machado Filho.
3483 * ix86 configurations now install header files that are consistent with
3484 what x86-64 configurations install. These same header files can be used
3485 for -m32, -m64, or -mx32 builds.
3486 Contributed by H.J. Lu.
3488 * Math library bug fixes. A thorough audit of all open math library bugs was
3489 conducted by Joseph Myers. Significant progress was made on many math
3490 library bugs resulting in more accurate exceptions and function results.
3491 Many thanks to all those that contributed including Andreas Jaeger for his
3492 patch review and work on the x87 trigonometric instruction issues.
3494 * Timezone data is no longer installed. Timezone-related binaries and scripts
3495 will continue to be installed. Users should obtain their timezone data from
3496 their distribution provider or from the tzdata package at
3497 <ftp://munnari.oz.au/pub/>.
3501 * The following bugs are resolved with this release:
3503 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3504 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3505 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3506 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3507 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3508 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3509 13484, 13506, 13515, 13523, 13524, 13538, 13540
3511 * New program pldd to list loaded object of a process
3512 Implemented by Ulrich Drepper.
3514 * Add nss_db support back to glibc. No more dependency on Berkeley db
3515 and support for initgroups lookups.
3516 Implemented by Ulrich Drepper.
3518 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3519 Contributed by HJ Lu.
3521 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3522 Contributed by HJ Lu.
3524 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3525 on x86-32 and x86-64.
3526 Contributed by Liubov Dmitrieva.
3528 * Optimized strchr and strrchr for SSE on x86-32.
3529 Contributed by Liubov Dmitrieva.
3531 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3532 for x86-64 and x86-32.
3533 Contributed by Liubov Dmitrieva.
3535 * New interfaces: scandirat, scandirat64
3536 Implemented by Ulrich Drepper.
3538 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3539 Implemented by Ulrich Drepper.
3541 * nscd now also caches the netgroup database.
3542 Implemented by Ulrich Drepper.
3544 * Integrate libm with gcc's -ffinite-math-only option.
3545 Implemented by Ulrich Drepper.
3547 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3548 to math functions. Implemented by Ulrich Drepper.
3550 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3551 Implemented by Ulrich Drepper.
3553 * New Linux interfaces: process_vm_readv, process_vm_writev
3555 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3556 Implemented by Ulrich Drepper.
3558 * Optimized nearbyint and strcasecmp for PPC.
3559 Implemented by Adhemerval Zanella.
3561 * New locales: bho_IN, unm_US, es_CU, ta_LK
3565 * The following bugs are resolved with this release:
3567 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3568 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3569 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3570 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3571 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3572 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3573 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3574 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3575 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3576 12795, 12811, 12813, 12814, 12841
3578 * The RPC implementation in libc is obsoleted. Old programs keep working
3579 but new programs cannot be linked with the routines in libc anymore.
3580 Programs in need of RPC functionality must be linked against TI-RPC.
3581 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3583 Visible changes of this change include (obviously) the inability to link
3584 programs using RPC functions without referencing the TI-RPC library and the
3585 removal of the RPC headers from the glibc headers.
3586 Implemented by Ulrich Drepper.
3588 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3589 syncfs, setns, sendmmsg
3591 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3592 yue_HK, lij_IT, mhr_RU
3594 * New encodings: CP770, CP771, CP772, CP773, CP774
3596 * New program sotruss to trace calls through PLTs
3597 Implemented by Ulrich Drepper.
3599 * The malloc hook implementation is marked deprecated and will be removed
3600 from the default implementation in the next version. The design never
3601 worked ever since the introduction of threads. Even programs which do
3602 not create threads themselves can use multiple threads created internally.
3606 * The following bugs are resolved with this release:
3608 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3609 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3610 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3611 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3614 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3616 * POWER7 optimizations: memset, memcmp, strncmp
3618 * New optimized string functions for x86-64: strnlen (SSE2),
3619 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3620 Implemented by Ulrich Drepper.
3624 * The following bugs are resolved with this release:
3626 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3627 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3628 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3629 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3630 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3631 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3632 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3633 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3635 * New interfaces: pthread_getname_np, pthread_setname_np
3637 * New Linux interface: recvmmsg
3639 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3641 * The dynamic linker now recognizes supported ABI versions from the
3642 EI_ABIVERSION field in the ELF header.
3643 Implemented by Ulrich Drepper.
3645 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3646 will not be used to fill in password fields in the passwd.byname replies.
3647 Instead it is used to synthesize the shadow.byname table, should it be
3648 missing. This is a useful mode in some installations involving Solaris.
3649 Implemented by Ulrich Drepper.
3651 * New locales: kok_IN, sq_MK, cv_RU
3655 * The following bugs are resolved with this release:
3657 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3658 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3659 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3660 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3661 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3662 10789, 10817, 10823, 10840, 10847
3664 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3666 Implemented by Ulrich Drepper.
3668 * Checking version of longjmp added that fails if an uninitialized stack
3669 frame would be created. Implemented by Ulrich Drepper.
3671 * STT_GNU_IFUNC is now supported in static executables.
3672 Implemented by H.J. Lu.
3674 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3676 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3677 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3678 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3679 Contributed by H.J. Lu.
3681 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3682 Implemented by Ulrich Drepper.
3684 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3686 Contributed by H.J. Lu.
3688 * Support for fma instruction in AVX on x86-64.
3689 Implemented by H.J. Lu and Ulrich Drepper.
3691 * AVX support in x86-64 auditing support in ld.so.
3692 Implemented by H.J. Lu.
3694 * STB_GNU_UNIQUE support added.
3695 Implemented by Ulrich Drepper.
3697 * Implement second fallback mode for optimized DNS lookup for even more
3698 broken environments. If two requests from the same port are not
3699 handled correctly close the socket and open a new one before sending
3700 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3701 can be used to select this mode right away, instead of rediscovering the
3702 necessity is every process again.
3703 Implemented by Ulrich Drepper.
3705 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3706 Implemented by Adam Tkac.
3708 * Optimized iconv conversions for S390x.
3709 Implemented by Andreas Krebbel.
3711 * Using condvars with PI mutexes is now more efficient due to kernel
3712 support for requeueing to PI futexes. NPTL support added for x86-64.
3713 Implemented by Ulrich Drepper.
3715 * New locales: ps_AF, my_MM
3719 * The following bugs are resolved with this release:
3721 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3722 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3723 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3724 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3725 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3727 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3728 Implemented by Ulrich Drepper.
3730 * New Linux interfaces: accept4, fallocate, fallocate64.
3731 Implemented by Ulrich Drepper.
3733 * Correct declarations of string function when used in C++ code. This
3734 could lead to compile errors for invalid C++ code.
3736 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3739 * New POSIX 2008 interface: psiginfo
3740 Implemented by Ulrich Drepper.
3742 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3743 Implemented by Ulrich Drepper.
3745 * Support for selecting between multiple function definitions at runtime
3746 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3748 * The libcrypt library can now use the hash function implementations in
3749 NSS. Implemented by Ulrich Drepper.
3751 * The malloc implementation can be compiled to be less memory efficient
3752 but higher performing in multi-threaded programs.
3753 Implemented by Ulrich Drepper.
3755 * New locales: nan_TW@latin, ks_IN
3757 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3758 Implemented by Ulrich Drepper.
3760 * Extended printf hook support. It is possible to use user-defined types
3761 and extend existing format specifiers.
3762 Implemented by Ulrich Drepper.
3764 * Handling for group shadow files has been added.
3765 Implemented by Ulrich Drepper.
3767 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3768 servers (the case, e.g., for some people using the built-in DNS
3769 server in ADSL modems/routers). There is a once-per-process timeout
3770 in case of a broken server. To avoid it, users can run nscd or put
3771 'options single-request' in /etc/resolv.conf.
3772 Implemented by Ulrich Drepper.
3776 * The following bugs are resolved with this release:
3778 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3779 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3780 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3781 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3782 6968, 6974, 6980, 6995, 7008, 7009, 7029
3784 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3785 up at the same time. Implemented by Ulrich Drepper.
3787 * TLS descriptors for LD and GD on x86 and x86-64.
3788 Implemented by Alexandre Oliva.
3790 * getaddrinfo now handles DCCP and UDPlite.
3791 Implemented by Ulrich Drepper.
3793 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3794 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3795 Implemented by Ulrich Drepper.
3797 * New implementation of memmem, strstr, and strcasestr which is O(n).
3798 Implemented by Eric Blake.
3800 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3802 * Implement "e" option for popen to open file descriptor with the
3803 close-on-exec flag set. Implemented by Ulrich Drepper.
3805 * Implement "b" mode for fmemopen. In this mode writes writes don't
3806 implicitly add a NUL byte and seeks from the end of the buffer really
3807 use the buffer end, not the string length as the basis.
3808 Implemented by Ulrich Drepper.
3810 * Many functions, exported and internal, now atomically set the close-on-exec
3811 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3813 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3815 Implemented by Pravin Satpute.
3817 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3821 * The following bugs are resolved with this release:
3823 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3824 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3825 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3826 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3827 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3828 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3829 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3831 * New locales: bo_CN, bo_IN, shs_CA.
3833 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3835 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3836 Implemented by Pravin Satpute.
3838 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3840 * nscd caches now all timeouts for DNS entries
3841 Implemented by Ulrich Drepper.
3843 * nscd is more efficient and wakes up less often.
3844 Implemented by Ulrich Drepper.
3846 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3847 vdprintf, and obstack_vprintf.
3848 Implemented by Jakub Jelinek.
3850 * Faster memset for x86-64.
3851 Implemented by Harsha Jagasia and H.J. Lu.
3853 * Faster memcpy on x86.
3854 Implemented by Ulrich Drepper.
3856 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3857 Implemented by Ulrich Drepper.
3859 * Faster sqrt and sqrtf implemention for some PPC variants.
3860 Implemented by Steven Munroe.
3864 * The following bugs are resolved with this release:
3866 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3867 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3868 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3869 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3870 5071, 5103, 5104, 5112, 5113, 5184, 5186
3872 * More checking functions: fread, fread_unlocked, open*, mq_open.
3873 Implemented by Jakub Jelinek and Ulrich Drepper.
3875 * Extend fortification to C++. Implemented by Jakub Jelinek.
3877 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3878 by not recognizing 'a' as a modifier when those specs are requested.
3879 Implemented by Jakub Jelinek.
3881 * PPC optimizations to math and string functions.
3882 Implemented by Steven Munroe.
3884 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3885 options to be passed. Implemented by Ulrich Drepper.
3887 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3889 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3890 Implemented by Ulrich Drepper.
3892 * Handle private futexes in the NPTL implementation.
3893 Implemented by Jakub Jelinek and Ulrich Drepper.
3895 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3896 Implemented by Roland McGrath and Ulrich Drepper.
3898 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3900 * SHA-256 and SHA-512 based password encryption.
3901 Implemented by Ulrich Drepper.
3903 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3904 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3907 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3908 Implemented by Ulrich Drepper.
3912 * The following bugs are resolved with this release:
3914 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3915 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3916 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3917 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3918 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3919 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3920 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3923 * New Linux interfaces: epoll_pwait, sched_getcpu.
3925 * New generic interfaces: strerror_l.
3927 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3931 * The following bugs are resolved with this release:
3933 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3934 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3935 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3936 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3937 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3938 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3939 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3940 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3941 3225, 3251, 3252, 3253, 3273
3943 * For Linux, the sorting of addresses returned by getaddrinfo now also
3944 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3945 Implemented by Ulrich Drepper.
3947 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3948 Implemented by Ulrich Drepper.
3950 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3952 * New iconv module for MIK. Contributed by Alexander Shopov.
3954 * For sites with broken group and/or passwd database, the auto-propagate
3955 option of nscd can prevent creating ID lookup entries from the results
3956 of a name lookup and vice versa. This usually is no problem but some
3957 site might have problems with the default behavior.
3958 Implemented by Ulrich Drepper.
3960 * Iterating over entire database in NIS can be slow. With the
3961 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3962 to trade time for memory. The entire database will be read at once.
3963 Implemented by Ulrich Drepper.
3965 * The interfaces introduced in RFC 3542 have been implemented by
3968 * Support for the new ELF hash table format was added by Ulrich Drepper.
3970 * Support for priority inheritance mutexes added by Jakub Jelinek and
3973 * Support for priority protected mutexes added by Jakub Jelinek.
3975 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
3976 or_IN, csb_PL, fy_NL, sr_ME.
3980 * More overflow detection functions.
3982 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
3983 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
3985 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
3986 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
3987 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
3988 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
3989 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
3990 by Masahide Washizawa.
3992 * It is now possible to install audit libraries for the dynamic linker using
3993 LD_AUDIT. Implemented by Ulrich Drepper.
3995 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
3996 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
3997 For a libc and libpthread that works well on Linux 2.4 kernels, we
3998 recommend using the stable 2.3 branch.
4000 * The new function open_wmemstream acts like open_memstream,
4001 but uses a wchar_t wide character buffer.
4003 * The new function ppoll is an improved version of poll, similar to pselect.
4005 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
4006 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
4007 renameat, unlinkat, linkat, symlinkat, readlinkat.
4009 * New Linux kernel system calls: unshare,
4010 inotify_init, inotify_add_watch, inotify_rm_watch.
4012 * The euidaccess function is now also known by the alias eaccess,
4013 for compatibility with some other systems.
4015 * Timezone data updated to 2006b version.
4019 * The following bugs are resolved with this release:
4021 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
4022 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
4023 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
4024 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
4025 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
4026 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
4028 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4030 * As of this release, GCC 4 can be used to compile the C Library.
4032 * Timezone data updated to 2005m version.
4036 * The following bugs are resolved with this release:
4038 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
4039 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
4040 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
4041 777, 787, 821, 822, 823, 825
4043 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
4047 * Support for RFC 3678. Real implementations exist only for Linux so far.
4048 Implemented by Ulrich Drepper.
4050 * nscd can now cache entries persistently. Expiring entries are reloaded.
4051 For speedups the cache can be shared in memory with client processes.
4052 Implemented by Ulrich Drepper.
4054 * nscd can now perform SELinux checks.
4055 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
4057 * getaddrinfo queries are now cached. Canonical name lookup is performed
4059 Implemented by Ulrich Drepper.
4061 * The nothrow function attribute is used when headers are used by gcc when
4062 compiling C code. This can avoid significant amounts of exception
4065 * The malloc functions perform more error checking and are stricter when
4066 it comes to reacting on errors. The default action is to terminate
4067 the process after showing an error message. Implemented by Ulrich Drepper.
4069 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
4070 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
4072 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
4073 namespaces using the new function dlmopen(). This feature is of course,
4074 like most other dynamic loading functionality, not available in statically
4075 linked applications. Implemented by Ulrich Drepper.
4077 * Low-overhead boundary checking variants of string and some stdio functions
4078 were added. These are to be used in conjunction with a gcc patch by
4079 Jakub Jelinek which adds calls to these functions if possible.
4080 Implemented by Jakub Jelinek and Ulrich Drepper.
4082 * Old code for several operating systems and machine architectures that
4083 have not been in working condition in a long time have been removed from
4084 the main source tree maintained by the GNU C Library's maintainers.
4085 These files are now reside in the separate `ports' source module
4086 that is usable as an add-on when building the library.
4090 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
4091 interrogate the dynamic linker, compatible with the Solaris interface.
4093 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
4094 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
4096 * getifaddrs now uses the netlink interface on Linux to get its information.
4097 Implemented by Thorsten Kukuk.
4099 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
4100 Implemented by Ulrich Drepper.
4102 * support for non-executable stacks on x86 has been added. Changes mostly
4105 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
4108 * getaddrinfo now performs destination address selection according to
4113 * Thread-safe interfaces for many functions that access locale data
4114 were added in version 2.3, but these features were omitted from NEWS.
4115 Many functions have variants with an `_l' suffix that take a `locale_t'
4116 object as a parameter rather than consulting the current locale.
4117 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
4118 create and maintain `locale_t' objects. Additionally, the new function
4119 `uselocale' sets "the current locale" (as used by functions not so
4120 parameterized) set for an individual thread. These features were added
4121 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
4123 * The functions getresuid, getresgid, setresuid, and setresgid, which
4124 have long been available on Linux, are now declared in <unistd.h>
4125 and are now also available on the Hurd.
4127 * ELF thread-local storage support (TLS) now works on x86-64.
4129 * The new dynamic string token $LIB is expanded in shared library names.
4130 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
4132 * Aldy Hernandez contributed complete software floating point support for
4133 PowerPC machines with no FPU.
4135 * fexecve is implemented on Linux.
4137 * The `btowc' function should work at least twice as fast due to
4138 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
4140 * With approriate thread add-ons cancelable functions are now implemented
4141 in libc.so as well. No need to call the function in libpthread. This
4142 change allowed to finally disable the incorrect and expensive handling
4143 of weak definition in ld.so.
4145 * Yet more PLT entries in libc.so have been removed. We finally arrived
4146 at the bare minimum. Startup times improved appropriately.
4148 * Support for the new Linux/x86 system call interface was added. The
4149 AT_SYSINFO auxiliary vector entry is recognized and handled.
4153 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
4156 * iconv (the program and the interface) now accepts empty names (excluding
4157 options like //TRANSLIT) to mean "use charset of current locale".
4159 * localedef can now transliterate characters in strings which are not in
4160 the provided charmap. The information from the input locale is used.
4162 * Prelinking support was added for ELF targets. This requires additional
4163 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
4165 * Read-only stdio streams now use mmap to speed up operation by eliminating
4166 copying and buffer underflows. To use add 'm' to the mode string of
4167 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
4169 * The malloc functions were completely rewritten by Wolfram Gloger based
4170 on Doug Lea's malloc-2.7.0.c.
4172 * Isamu Hasegawa contributed a completely new and POSIX-conformant
4173 implementation of regex.
4175 * Bruno Haible upgraded the iconv and locale implementation to support
4178 * Contents of the LC_* and LANG environment variables in the CEN style are
4179 not recognized anymore. It never was used. Change by Ulrich Drepper.
4181 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
4182 thread-local storage (TLS) ABI on some platforms.
4183 Changes by Ulrich Drepper. SH support by Kaz Kojima.
4185 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
4186 EUC-JISX0213, and TSCII.
4188 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
4189 BSD-compatible interface for getting all network interface addresses.
4190 Implementation for IPv4 by Roland McGrath.
4192 * Loading of locale data is faster due to the introduction of a locale
4193 archive. Implemented by Roland McGrath and Ulrich Drepper.
4195 * Startup times are significantly reduced by not using exported functions
4196 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
4199 * Steven Munroe contributed a port to PowerPC64/Linux.
4203 * The Hurd now uses the GNU libio implementation of stdio rather than the
4204 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
4206 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
4207 with the same behavior as the Linux system call of the same name.
4211 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
4212 128-bit long double format.
4214 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
4215 IBM1161, and IBM1162 charsets.
4217 * Andreas Jaeger contributed a port to x86-64/Linux.
4219 * Peter Bruin contributed a port to PowerPC/Hurd.
4221 * libc functions using I/O streams now can handle wide-oriented streams
4224 * optimizations in the dynamic linker. Binaries created by recent binutils
4225 versions start up quicker due to reduced time spent on relocations.
4227 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
4231 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
4232 asinh, atanh, j0 for the 128-bit long double format.
4234 * Bruno Haible updated all the code handling Unicode in some form to
4235 support Unicode 3.1.
4237 * Speed of regex for single-byte locales is back to previous levels.
4238 Patch by Isamu Hasegawa.
4240 * Alpha, SPARC, and IA-64 now also using floating stacks.
4242 * Startup time of internationalized applications greatly improved through
4243 iconv cache. Use iconvconfig to generate the cache file.
4244 Contributed by Ulrich Drepper.
4246 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
4247 severe performance problems. Patch by David Mosberger.
4249 * The Hurd port got a lot more functionality like AIO, various stdio
4250 extensions, etc. Mainly done by Roland McGrath.
4252 * mtrace can now lookup symbols in shared libraries.
4256 * Intel's IA-64 math library is largely integrated. It provides fast and
4257 accurate implementatations for most basic and standard math functions
4258 in float, double, and long double format.
4260 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
4261 and asin for the 96-bit long double format and asin, log, tan for the
4262 128-bit long double format.
4264 * The beginning of a last-bit accurate math library by IBM Haifa were added.
4265 The basic double functions exist today. Contributed by Abraham Ziv
4266 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
4267 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
4269 * An asynchronous name lookup library was added. The interface is designed
4270 after POSIX AIO. The proposal was circulated beforehand to get comments.
4271 No negative ones came in. Implemented by Ulrich Drepper.
4273 * Port to S390/64bit contributed by Martin Schwidefsky
4274 <schwidefsky@de.ibm.com>.
4276 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
4277 of functions for Linux/IA-64.
4279 * The RPC code is now thread safe. Threads can now use the same service
4280 of different services at the same time. Patch by Eric Norum
4281 <eric.norum@usask.ca> with some help by Ulrich Drepper.
4283 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
4284 family of functions for Linux/S390.
4286 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
4287 of functions for Linux/x86.
4289 * Port to Linux/CRIS contributed by Axis Communications.
4293 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
4294 we can now check for namespace violations and missing declarations. The
4295 result is that almost all headers are now Unix-compliant (as defined in
4296 the upcoming XPG6). The negative side is that some programs might need
4297 corrections, too, if they depend on the incorrect form of the headers in
4298 previous versions which defined too many symbols and included too many
4301 * regex now handles multibyte character sets correctly.
4302 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
4304 * iconv (the program) does now conform to the upcoming XPG6 and handles
4305 charmaps. Instead of the charset names the path of charmaps can be
4306 provided and the conversion happens based on this data.
4307 Contributed by Ulrich Drepper.
4309 * The locale program now provides detailed information about the installed
4314 only lists the names of the supported locales
4318 provides details such as country, language, and codeset name.
4319 Contributed by Ulrich Drepper.
4323 * The gencat program now parses the input file according to the charset
4324 selected by the LC_CTYPE category. This is important for stateful
4325 character sets. To make generating catalogs easier there is a way
4326 to overwrite the charset selected by the locale: before the first
4327 message or $ quote line the catalog can contain a line like
4329 $ codeset=ISO-8859-2
4331 to select the charset (ISO-8859-2 in this case).
4333 Implemented by Shinya Hanataka and Ulrich Drepper.
4335 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
4336 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
4337 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
4339 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
4340 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
4342 * The LANGUAGE environment variable is now ignored unless the locale is
4343 changed from the default "C" locale.
4345 * The usual bug fixes.
4349 * Greg McGary added runtime support for bounds checking using gcc's
4350 new -fbounded-pointers option. ix86 target is complete. PowerPC
4353 * Thorsten Kukuk added secure mode support to nscd.
4355 * The Berkeley db libraries have been removed.
4357 Related, the nss_db module is now in a separate package since it
4358 obviously requires a database library being available.
4360 * Wide character I/O streams implemented by Ulrich Drepper.
4362 * Functions from the extended socket API added by Ulrich Drepper.
4364 * Functions feenableexcept and fedisableexcept to control the
4365 behaviour of individual exceptions have been added by Andreas Jaeger.
4367 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
4369 * The resolver code has been updated from bind 8.2.3-T5B which supports
4370 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
4373 This change could in some situations effect backward compatibility. Since
4374 now `_res' is a thread-local instead of a global variable, modifying it
4375 in one thread does not have any effect in other threads.
4377 The resolver library was also extended to allow IPv6 as the transport
4378 protocol for the requests. This work was done by Stig Venaas.
4380 * Compatibility code for K&R C compilers has been removed from the
4381 header files. A ISO C compiler is needed to use the library
4382 (conforming to either C89 or C99 standard).
4384 * Complete rewrite of the localedef program to support multibyte character
4385 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
4386 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
4387 Implemented by Ulrich Drepper.
4389 Bruno Haible significantly improved the generation and use of the data
4390 structures for the wide character tables.
4392 * Plural handling in gettext implemented by Ulrich Drepper.
4394 * The utmp daemon has been removed.
4396 * The port to MIPS-Linux has been finished by Andreas Jaeger.
4398 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
4401 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
4403 * POSIX barriers implemented by Kaz Kylheku.
4405 * POSIX spawn function family implemented by Ulrich Drepper.
4407 * POSIX spinlocks are now available.
4409 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
4411 * the configure option --enable-kernel=X.Y.Z allows to strip out
4412 compatibility for kernel versions before X.Y.Z. This is currently only
4413 implemented for Linux.
4415 * the sockaddr_in6 structure changed. The IPv6 working group added a new
4416 field sin6_scope_id. This means that all programs using IPv6 should be
4417 recompiled. Don't expect binary compatibility with previous glibc
4420 * various conversion modules for IBM character sets contributed by
4423 * IA-64 port by Jes Sorensen and HJ Lu.
4437 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
4439 * New xdr functions are added; some rpc functions are now 64bit clean.
4441 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
4443 * Fixed known incompatibilities with glibc 2.0.
4445 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
4447 * Optimized a number of functions (especially the ELF dynamic loader).
4449 * Update timezone data files.
4451 * lots of charmaps corrections
4453 * some new locale definitions and charmaps
4458 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
4459 conform to POSIX member type requirements. Symbol versions have been
4460 adjusted as needed within the library, and for direct use by applications,
4461 but there is potential for problems if third-party libraries use
4462 struct timeval as part of their interface. This does not present
4463 a problem for X and other "essential" system libraries.
4465 * An additional locale model to support C++ Standard Library locale
4466 model and probably more was implemented by Ulrich Drepper.
4468 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
4471 * Miles Bader provided the `argp' function family to support hierachical
4472 command line argument parsing, layered on top of getopt.
4474 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
4476 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
4479 * scanf recognizes the %a and %A format for scanning floating point numbers.
4481 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
4482 information and interfaces for the available integer types.
4484 * about 130 new math functions were added to implement the ISO C9x math
4487 * the new header <complex.h> contains definitions of the complex math
4488 functions from ISO C 9X.
4490 * the new header <tgmath.h> defines generic macros to use complex or
4491 real valued functions.
4493 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
4495 * Andreas Jaeger provided a test suite for the math library.
4497 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4499 * Ulrich Drepper added character set conversion functions (iconv).
4501 * Optimized string functions have been added.
4503 * The localedata addon is now part of glibc.
4505 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4507 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4508 daemon for NSS (nscd).
4510 Missing a better place here are some numbers on improvements. Under
4511 Linux 2.1.125 un-tar-ing the kernel sources takes
4515 using local files 12.19s 6.88s 22.91s
4517 using NIS 13.92s 8.91s 26.34s
4519 using NIS & nscd 10.37s 7.34s 25.30s
4521 using NIS+ 27.57s 30.37s 640.46s
4523 using NIS+ & nscd 10.25s 7.83s 26.51s
4525 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4527 Keep in mind that non-namelookup related operations dominate above times.
4528 It was just a common complain that using NIS+ unpacking the kernel is
4531 [1] The old nscd implementation is not available anymore since it was
4532 distributed with glibc up to version 2.0.98 and thus is now replaced.
4534 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4536 * Mark Kettenis provided a Hesiod NSS module.
4538 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4539 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4541 * rcmd can now handle netgroups (Dick Streefland).
4543 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4546 * Support for the IPv6 protocol has been added to the socket API, as per the
4547 latest draft standards.
4549 * Support for Linux 2.2 has been added.
4551 * Interface changes relative to the latest 2.0.x release:
4552 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4553 addseverity NEW: Unix98
4554 alphasort64 NEW: LFS
4555 argp_err_exit_status NEW: argp, GNU ext
4556 argp_error NEW: argp, GNU ext
4557 argp_failure NEW: argp, GNU ext
4558 argp_help NEW: argp, GNU ext
4559 argp_parse NEW: argp, GNU ext
4560 argp_program_bug_address NEW: argp, GNU ext
4561 argp_program_version NEW: argp, GNU ext
4562 argp_program_version_hook NEW: argp, GNU ext
4563 argp_state_help NEW: argp, GNU ext
4564 argp_usage NEW: argp, GNU ext
4565 authdes_create NEW: Secure RPC
4566 authdes_getucred NEW: Secure RPC
4567 authdes_pk_create NEW: Secure RPC
4568 backtrace NEW: GNU ext.
4569 backtrace_symbols NEW: GNU ext.
4570 backtrace_symbols_fd NEW: GNU ext.
4572 cacosf NEW: ISO C 9x
4573 cacosh NEW: ISO C 9x
4574 cacoshf NEW: ISO C 9x
4575 cacoshl NEW: ISO C 9x
4576 cacosl NEW: ISO C 9x
4583 casinf NEW: ISO C 9x
4584 casinh NEW: ISO C 9x
4585 casinhf NEW: ISO C 9x
4586 casinhl NEW: ISO C 9x
4587 casinl NEW: ISO C 9x
4589 catanf NEW: ISO C 9x
4590 catanh NEW: ISO C 9x
4591 catanhf NEW: ISO C 9x
4592 catanhl NEW: ISO C 9x
4593 catanl NEW: ISO C 9x
4594 cbc_crypt NEW: Secure RPC
4598 ccoshf NEW: ISO C 9x
4599 ccoshl NEW: ISO C 9x
4605 cimagf NEW: ISO C 9x
4606 cimagl NEW: ISO C 9x
4607 clearerr_locked REMOVED
4608 clntunix_create NEW: sunrpc ext
4610 clog10 NEW: ISO C 9x
4611 clog10f NEW: ISO C 9x
4612 clog10l NEW: ISO C 9x
4622 cprojf NEW: ISO C 9x
4623 cprojl NEW: ISO C 9x
4625 crealf NEW: ISO C 9x
4626 creall NEW: ISO C 9x
4631 csinhf NEW: ISO C 9x
4632 csinhl NEW: ISO C 9x
4635 csqrtf NEW: ISO C 9x
4636 csqrtl NEW: ISO C 9x
4640 ctanhf NEW: ISO C 9x
4641 ctanhl NEW: ISO C 9x
4643 des_setparity NEW: Secure RPC
4644 ecb_crypt NEW: Secure RPC
4645 endutxent NEW: Unix98
4647 exp10f NEW: ISO C 9x
4648 exp10l NEW: ISO C 9x
4652 fattach NEW: STREAMS
4653 fdetach NEW: STREAMS
4657 feclearexcept NEW: ISO C 9x
4658 fegetenv NEW: ISO C 9x
4659 fegetexceptflag NEW: ISO C 9x
4660 fegetround NEW: ISO C 9x
4661 feholdexcept NEW: ISO C 9x
4663 feraiseexcept NEW: ISO C 9x
4664 ferror_locked REMOVED
4665 fesetenv NEW: ISO C 9x
4666 fesetexceptflag NEW: ISO C 9x
4667 fesetround NEW: ISO C 9x
4668 fetestexcept NEW: ISO C 9x
4669 feupdateenv NEW: ISO C 9x
4670 fflush_locked REMOVED
4674 fgets_unlocked NEW: GNU ext.
4675 fileno_locked REMOVED
4687 fputc_locked REMOVED
4688 fputs_unlocked NEW: GNU ext.
4689 fread_unlocked NEW: GNU ext.
4694 fstatvfs NEW: Unix98
4698 ftruncate64 NEW: LFS
4700 fwrite_unlocked NEW: GNU ext.
4701 gai_strerror NEW: IPv6
4705 getchar_locked REMOVED
4707 getdate_err NEW: Unix98
4708 getdate_r NEW: GNU ext.
4710 getnameinfo NEW: IPv6
4711 getnetname NEW: Secure RPC
4712 getpmsg NEW: STREAMS
4713 getpt NEW: Unix98 PTY
4714 getrlimit64 NEW: LFS
4715 getutxent NEW: Unix98
4716 getutxid NEW: Unix98
4717 getutxline NEW: Unix98
4718 glob64 NEW: GNU ext.
4719 globfree64 NEW: GNU ext.
4720 gnu_get_libc_release NEW: GNU ext.
4721 gnu_get_libc_version NEW: GNU ext.
4722 grantpt NEW: Unix98 PTY
4723 host2netname NEW: Secure RPC
4725 iconv_close NEW: iconv
4726 iconv_open NEW: iconv
4727 if_freenameindex NEW: IPv6
4728 if_indextoname NEW: IPv6
4729 if_nameindex NEW: IPv6
4730 if_nametoindex NEW: IPv6
4731 in6addr_any NEW: IPv6
4732 in6addr_loopback NEW: IPv6
4733 inet6_isipv4mapped NEW: IPv6
4734 isastream NEW: STREAMS
4735 iswblank NEW: GNU ext.
4736 key_decryptsession NEW: Secure RPC
4737 key_decryptsession_pk NEW: Secure RPC
4738 key_encryptsession NEW: Secure RPC
4739 key_encryptsession_pk NEW: Secure RPC
4740 key_gendes NEW: Secure RPC
4741 key_get_conv NEW: Secure RPC
4742 key_secretkey_is_set NEW: Secure RPC
4743 key_setnet NEW: Secure RPC
4744 key_setsecret NEW: Secure RPC
4745 llrint NEW: ISO C 9x
4746 llrintf NEW: ISO C 9x
4747 llrintl NEW: ISO C 9x
4748 llround NEW: ISO C 9x
4749 llroundf NEW: ISO C 9x
4750 llroundl NEW: ISO C 9x
4755 lrintf NEW: ISO C 9x
4756 lrintl NEW: ISO C 9x
4757 lround NEW: ISO C 9x
4758 lroundf NEW: ISO C 9x
4759 lroundl NEW: ISO C 9x
4761 makecontext NEW: Unix98
4762 mempcpy NEW: GNU ext.
4765 modify_ldt NEW: kernel
4769 nearbyint NEW: ISO C 9x
4770 nearbyintf NEW: ISO C 9x
4771 nearbyintl NEW: ISO C 9x
4772 netname2host NEW: Secure RPC
4773 netname2user NEW: Secure RPC
4774 nexttoward NEW: ISO C 9x
4775 nexttowardf NEW: ISO C 9x
4776 nexttowardl NEW: ISO C 9x
4780 passwd2des NEW: Secure RPC
4782 pow10f NEW: GNU ext.
4783 pow10l NEW: GNU ext.
4786 printf_size NEW: GNU ext.
4787 printf_size_info NEW: GNU ext.
4788 profil_counter REMOVED
4789 pthread_mutexattr_getkind_np REPLACED
4790 pthread_mutexattr_setkind_np REPLACED
4791 ptsname NEW: Unix98 PTY
4792 ptsname_r NEW: Unix98 PTY
4794 putchar_locked REMOVED
4795 putgrent NEW: GNU ext.
4797 putpmsg NEW: STREAMS
4798 pututxline NEW: Unix98
4802 readdir64_r NEW: LFS
4803 remquo NEW: ISO C 9x
4804 remquof NEW: ISO C 9x
4805 remquol NEW: ISO C 9x
4807 roundf NEW: ISO C 9x
4808 roundl NEW: ISO C 9x
4810 scalbln NEW: ISO C 9x
4811 scalblnf NEW: ISO C 9x
4812 scalblnl NEW: ISO C 9x
4814 sendfile NEW: kernel
4815 setcontext NEW: Unix98
4816 setrlimit64 NEW: LFS
4817 setutxent NEW: Unix98
4819 sigignore NEW: Unix98
4820 sigqueue NEW: POSIX.1b
4821 sigrelse NEW: Unix98
4822 sigset NEW: POSIX.1b
4823 sigtimedwait NEW: POSIX.1b
4824 sigwaitinfo NEW: POSIX.1b
4825 sincos NEW: GNU ext.
4826 sincosf NEW: GNU ext.
4827 sincosl NEW: GNU ext.
4831 strcasestr NEW: GNU ext.
4832 strtoimax NEW: ISO C 9x
4833 strtoumax NEW: ISO C 9x
4834 strverscmp NEW: GNU ext.
4835 svcauthdes_stats NEW: Secure RPC
4836 svcunix_create NEW: sunrpc etx
4837 svcunixfd_create NEW: sunrpc ext
4838 swapcontext NEW: Unix98
4839 tcgetsid NEW: Unix98 PTY
4840 tdestroy NEW: GNU ext.
4841 tgamma NEW: ISO C 9x
4842 tgammaf NEW: ISO C 9x
4843 tgammal NEW: ISO C 9x
4847 truncf NEW: ISO C 9x
4848 truncl NEW: ISO C 9x
4850 unlockpt NEW: Unix98 PTY
4851 updwtmpx NEW: Unix98
4852 user2netname NEW: Secure RPC
4853 utmpxname NEW: Unix98
4854 versionsort NEW: GNU ext.
4855 versionsort64 NEW: GNU ext.
4857 wcscasecmp NEW: GNU ext.
4858 wcsncasecmp NEW: GNU ext.
4859 wcsnlen NEW: GNU ext.
4860 wcstoimax NEW: ISO C 9x
4861 wcstoll NEW: ISO C 9x
4862 wcstoull NEW: ISO C 9x
4863 wcstoumax NEW: ISO C 9x
4865 wordexp NEW: POSIX.2
4866 wordfree NEW: POSIX.2
4867 write_profiling REMOVED
4868 xdecrypt NEW: Secure RPC
4869 xdr_authdes_cred NEW: Secure RPC
4870 xdr_authdes_verf NEW: Secure RPC
4871 xdr_cryptkeyarg NEW: Secure RPC
4872 xdr_cryptkeyarg2 NEW: Secure RPC
4873 xdr_cryptkeyres NEW: Secure RPC
4874 xdr_getcredres NEW: Secure RPC
4875 xdr_key_netstarg NEW: Secure RPC
4876 xdr_key_netstres NEW: Secure RPC
4877 xdr_keybuf NEW: Secure RPC
4878 xdr_keystatus NEW: Secure RPC
4879 xdr_netnamestr NEW: Secure RPC
4880 xdr_sizeof NEW: Secure RPC
4881 xdr_unixcred NEW: sunrpc ext
4882 xencrypt NEW: Secure RPC
4883 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4894 * inet_ntoa is thread-safe
4896 * updwtmp is moved from libutil to libc
4898 * rewrite of cbrt function
4900 * update of timezone data
4914 * add atoll function
4916 * fix complex problems in Berkeley DB code
4918 * fix math functions
4922 * fixed lots of header problems (especially Linux/GNU specific)
4924 * dynamic loader preserves all registers
4926 * Roland McGrath provided support for handling of auxiliary objects in
4927 the ELF dynamic loader.
4929 * support for parallel builds is improved
4933 * GNU extensions are no longer declared by default. To enable them you
4934 must define the macro `_GNU_SOURCE' in your program or compile with
4937 * The library has changed from using GNU ld symbol aliases to using weak
4938 symbols where available. The ELF object file format supports weak
4939 symbols; GNU ld also supports weak symbols in the a.out format. (There
4940 is also now support for other GNU ld extensions in ELF. Use the
4941 `--with-elf' option to configure to indicate you have ELF, and
4942 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4943 of many files which contained only symbol aliases, reducing the size of
4944 the source and the compiled library; many other files were renamed to
4945 less cryptic names previously occupied by the symbol alias files.
4946 There is a new header file <elf.h> for programs which operate on
4947 files in the ELF format.
4949 * Converted to Autoconf version 2, so `configure' has more options.
4950 Run `configure --help' to see the details.
4952 * The library can now be configured to build profiling, highly-optimized
4953 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4954 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4955 `configure' enable building these extra libraries. The shared library is
4956 built by default when using both ELF and GNU ld. When shared libraries
4957 are enabled, the new library `-ldl' is available for arbitrary run-time
4958 loading of shared objects; its interface is defined in <dlfcn.h>. The
4959 new header file <link.h> gives access to the internals of the run-time
4960 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4961 application of same name on other systems and it provides information
4962 about dynamically linked binaries.
4964 * The C library now provides the run-time support code for profiling
4965 executables compiled with `-pg'. Programs can control the profiling code
4966 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4967 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4968 the support for this file format was contributed by David Mosberger-Tang.
4970 * The math code has been replaced with a math library based on fdlibm from
4971 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4972 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
4973 functions. The math functions now reside in a separate library, so
4974 programs using them will need to use `-lm' their linking commands.
4976 * John C. Bowman contributed optimized ix87 assembler inline functions.
4978 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
4979 mechanism similar to that found in Solaris 2. This is now used for the
4980 group, passwd, hosts, networks, services, protocols, rpc, ethers,
4981 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
4982 file controls what services are used for each individual database. This
4983 works by loading shared libraries with names specified in `nsswitch.conf',
4984 so service modules can be changed or added at any time without even
4985 relinking any program. Currently there are the file, db, and NIS based
4986 NSS services available.
4988 * The new functions `strtoq' and `strtouq' parse integer values from
4989 strings, like `strtol' and `strtoul', but they return `long long int' and
4990 `unsigned long long int' values, respectively (64-bit quantities).
4992 * The new functions `strtof' and `strtold' parse floating-point values from
4993 strings, like `strtod', but they return `float' and `long double' values,
4994 respectively (on some machines `double' and `long double' are the same).
4996 * Ulrich Drepper has contributed new implementations of the floating-point
4997 printing and reading code used in the `printf' family of functions and
4998 `strtod', `strtof', and `strtold'. These new functions are perfectly
4999 accurate, and much faster than the old ones.
5001 * The implementation of the POSIX locale model was completely rewritten by
5002 Ulrich Drepper. This includes the new programs `localedef' and `locale'
5003 to compile the POSIX locale definition.
5005 * The former dummy implementations of the strcoll and strxfrm function are
5006 now replaced by fully functional code contributed by Ulrich Drepper. The
5007 collation information comes from the POSIX locale definitions.
5009 * The new header <langinfo.h> defines an interface for accessing
5010 various locale-dependent data (using the locale chosen with `setlocale').
5012 * Ulrich Drepper has contributed a new suite of functions for operation on
5013 wide-character and multibyte-character strings, in <wchar.h>;
5014 and classification and case conversion of wide characters, in <wctype.h>.
5015 These new functions are conforming to the ISO C, Amendement 1 specification.
5017 * There is now a second implementation of the standard I/O library available.
5018 It comes from GNU libg++ as was written by Per Bothner, heavily modified
5019 by Hongjiu Lu and made thread safe by Ulrich Drepper.
5021 * You can now use positional parameter specifications in format strings
5022 for the `printf' and `scanf' families of functions. For example,
5023 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
5024 ``Number 6, Mr Jones''. This is mainly useful when providing different
5025 format strings for different languages, whose grammars may dictate
5026 different orderings of the values being printed. To support this
5027 feature, the interface for `register_printf_handler' has changed; see
5028 the header file <printf.h> for details.
5030 * The `printf' and `scanf' families of functions now understand a new
5031 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
5032 to group numbers as indicated by the locale; for `scanf' and friends, this
5033 says to accept as valid only a number with all the proper grouping
5034 separators in the right places. In the default "C" locale, numbers are
5035 not grouped; but locales for specific countries will define the usual
5036 conventions (i.e. separate thousands with `,' in the US locale).
5038 * The pgrp functions have been regularized, slightly incompatibly but much
5039 less confusingly. The core functions are now `getpgid' and `setpgid',
5040 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
5041 argument) and BSD `setpgrp' (identical to `setpgid') functions are
5042 provided for compatibility. There is no longer an incompatible `getpgrp'
5043 with an argument declared under _BSD_SOURCE; no BSD code uses it.
5045 * The new header file <fts.h> and suite of functions simplify programs that
5046 operate on directory trees. This code comes from 4.4 BSD.
5048 * The resolver code has been updated from the BIND 4.9.5-P1 release.
5049 Parts of the code were heavily modified by Ulrich Drepper to fit in the
5050 NSS scheme used in glibc.
5052 * There is a new malloc debugging hook `__memalign_hook'.
5054 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
5055 `unsigned int' in <sys/types.h>. These are for compatibility only and
5056 their use is discouraged.
5058 * The `-lmcheck' library to enable standard malloc debugging hooks is now
5059 done differently, so that it works even without GNU ld.
5061 * New function `euidaccess' checks allowed access to a file like `access',
5062 but using the effective IDs instead of the real IDs.
5064 * The time zone data files have been updated for the latest and greatest
5065 local time conventions of the countries of the world.
5067 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
5070 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
5071 for formatting floating-point numbers. They are provided only for
5072 compatibility; new programs should use `sprintf' instead. There are
5073 also equivalent function for the `long double' floating-point type and
5074 all functions also exist in a reentrant form.
5076 * The new auxiliary library `-lutil' from 4.4 BSD contains various
5077 functions for maintaining the login-record files (primarily of use to
5078 system programs such as `login'), and convenient functions for
5079 allocating and initializing a pseudo-terminal (pty) device.
5081 * Ulrich Drepper has contributed new support for System V style
5082 shared memory and IPC on systems that support it.
5084 * Ulrich Drepper has contributed several miscellaneous new functions found
5085 in System V: The `hsearch' family of functions provide an effective
5086 implementation of hash tables; `a64l' and `l64a' provide a very simple
5087 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
5090 * Ulrich Drepper has contributed new reentrant counterparts for the
5091 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
5093 * Ulrich Drepper has contributed new, highly-optimized versions of several
5094 string functions for the i486/Pentium family of processors.
5096 * Ulrich Drepper has updated the Linux-specific code, based largely
5097 on work done in Hongjiu Lu's version of GNU libc for Linux.
5098 The GNU library now supports Linux versions 2.0.10 and later,
5099 using the ELF object file format (i[3456]86-*-linux).
5101 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
5103 * David Mosberger-Tang and Richard Henderson have ported the C library
5104 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
5105 dynamic linking support for ELF/Alpha.
5107 * Richard Henderson contributed several Alpha optimized assembler function
5108 for arithmetic and string handling.
5110 * Ulrich Drepper has contributed a new set of message catalog functions to
5111 support multiple languages using the <libintl.h> interface, for use with
5112 his new package GNU gettext. Translation volunteers have contributed
5113 catalogs of the library's messages in Spanish, German, and Korean.
5115 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
5116 program and the `catgets' function for reading the catalog files it
5117 creates. (The <libintl.h> interface is preferred; we include the
5118 <nl_types.h> interface using `catgets' only for source compatibility with
5119 programs already written to use it.)
5121 * New header file <values.h> gives SVID-compatible names for <limits.h>
5124 * Various new macros, declarations, and small header files for compatibility
5127 * New function `group_member' is a convenient way to check if a process has
5128 a given effective group ID.
5130 * When using GCC 2.7 and later, the socket functions are now declared in a
5131 special way so that passing an argument of type `struct sockaddr_in *',
5132 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
5133 `struct sockaddr *' type, does not generate a type-clash warning.
5135 * New function `error' declared in header file <error.h> is a convenient
5136 function for printing error messages and optionally exiting; this is the
5137 canonical function used in GNU programs. The new functions `err', `warn',
5138 and friends in header file <err.h> are the canonical 4.4 BSD interface for
5139 doing the same thing.
5141 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
5142 POSIX.2 `glob' function to do ~ and {...} expansion.
5144 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
5145 `clearenv' which is used in POSIX.9 is also available.
5147 * New function `getsid' returns session ID number on systems that support it.
5149 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
5150 files <db.h> and <mpool.h> provide a rich set of functions for several
5151 types of simple databases stored in memory and in files, and <ndbm.h> is
5152 an old `ndbm'-compatible interface using the `db' functions. Link with
5153 `-ldb' to get these functions.
5155 * New macro `strdupa' copies a string like `strdup', but uses local stack
5156 space from `alloca' instead of dynamic heap space from `malloc'.
5158 * New function `strnlen' is like `strlen' but searches only a given maximum
5159 number of characters for the null terminator. `stpncpy', `strndup' and
5160 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
5163 * New function `statfs' in header <sys/statfs.h>.
5165 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
5166 provide convenient functions for operating on blocks of null-terminated
5169 * A new suite of functions in <utmp.h> handle all the details of reading
5170 and writing the utmp file.
5172 * An implementation of the NIS/YP(tm) based NSS service was contributed by
5175 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
5176 completely POSIX compliant and also implemented the extended functionality
5177 to handle alternate digit representation and alternate era date formats.
5179 * Ulrich Drepper provided an implementation of the `strptime' function
5180 defined in XPG4.2 which transforms a string into a `struct tm' value.
5182 * Paul Eggert provided the tzselect shell script as part of the timezone
5183 code. The shell script makes it easy to select the correct timezone
5186 * The implementation of the malloc family of functions is completely replaced
5187 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
5188 The implementation uses the mmap function (if available) and it is
5189 optimized for the use in multi threaded programs.
5191 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
5192 functions. This new functionality is usable by specifying a special
5193 salt string and it is compatible with implementation on *BSD systems.
5195 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
5196 `getsubopt' to handle second level command line options, `bsd_signal'
5197 to access BSD style `signal' functionality, the obsolete `regexp' style
5200 * the `lchown' function is available on system which support this
5203 * The implementation of the shadow password handling function was contributed
5206 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
5208 * POSIX.1g support was added. The <sys/select.h> header is available,
5209 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
5210 implementation of `getaddrinfo'.
5214 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
5216 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
5217 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
5219 * The new function `daemon' from 4.4 BSD is useful for server programs that
5220 want to put themselves in the background.
5222 * Joel Sherrill has contributed support for several standalone boards that
5223 run without an operating system.
5225 * `printf', `scanf' and friends now accept a `q' type modifier for long
5226 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
5228 * All of the code taken from BSD (notably most of the math and networking
5229 routines) has been updated from the BSD 4.4-Lite release.
5231 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
5233 * The new functions `getdomainname' and `setdomainname' fetch or change the
5234 YP/NIS domain name. These are system calls which exist on systems which
5237 * The time zone data files have been updated for the latest international
5240 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
5241 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
5245 * The C library now includes support for Sun RPC, from Sun's free
5246 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
5247 are included. (There is still no support for YP.)
5249 * Tom Quinn has contributed a port of the C library to SGI machines running
5250 Irix 4 (mips-sgi-irix4).
5252 * The new `lockf' function is a simplified interface to the locking
5253 facilities of `fcntl', included for compatibility.
5255 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
5257 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
5259 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
5262 * The error message printed by `assert' for a failed assertion now includes
5263 the name of the program (if using GNU ld) and the name of the calling
5264 function (with versions of GCC that support this).
5266 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
5268 * The library now includes the <sys/mman.h> header file and memory
5269 management functions `mmap', `munmap', `mprotect', `msync', and
5270 `madvise', on systems that support those facilities.
5272 * The interface for `mcheck' has changed slightly: the function called to
5273 abort the program when an allocation inconsistency is detected now takes
5274 an argument that indicates the type of failure. The new function
5275 `mprobe' lets you request a consistency check for a particular block at
5276 any time (checks are normally done only when you call `free' or `realloc'
5279 * It is now possible to easily cross-compile the C library, building on one
5280 system a library to run on another machine and/or operating system. All
5281 you need to do is set the variable `HOST_CC' in `configparms' to the
5282 native compiler for programs to run on the machine you are building on (a
5283 few generator programs are used on Unix systems); set `CC' to the
5286 * The new function `fexecve' (only implemented on the GNU system) executes
5287 a program file given a file descriptor already open on the file.
5291 * Brendan Kehoe has contributed most of a port to the DEC Alpha
5292 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
5294 * You can set the variable `libprefix' in `configparms' to specify a prefix
5295 to be prepended to installed library files; this makes it easy to install
5296 the GNU C library to be linked as `-lgnuc' or whatever.
5298 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
5299 copies a limited number of characters from a string, and returns the
5300 address of the last character written.
5302 * You no longer need to check for whether the installed `stddef.h' is
5303 compatible with the GNU C library. configure now checks for you.
5305 * You can now define a per-stream `fileno' function to convert the
5306 stream's cookie into an integral file descriptor.
5308 * ``malloc (0)'' no longer returns a null pointer. Instead, it
5309 allocates zero bytes of storage, and returns a unique pointer which
5310 you can pass to `realloc' or `free'. The behavior is undefined if
5311 you dereference this pointer.
5313 * The C library now runs on Sony NEWS m68k machines running either
5314 NewsOS 3 or NewsOS 4.
5316 * The new `syscall' function is a system-dependent primitive function
5317 for invoking system calls. It has the canonical behavior on Unix
5318 systems, including unreliable return values for some calls (such as
5319 `pipe', `fork' and `getppid').
5321 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
5322 to `EAGAIN', which is the preferred name. On systems whose kernels
5323 use two distinct codes, the C library now translates EWOULDBLOCK to
5324 EAGAIN in every system call function.
5328 * The GNU C Library Reference Manual is now distributed with the library.
5329 `make dvi' will produce a DVI file of the printed manual.
5330 `make info' will produce Info files that you can read on line using C-h i
5331 in Emacs or the `info' program.
5332 Please send comments on the manual to bug-glibc-manual@gnu.org.
5334 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
5336 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
5338 * Jason Merrill has contributed a port to the Sequent Symmetry running
5339 Dynix version 3 (i386-sequent-dynix).
5341 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
5342 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
5344 * New function `memory_warnings' lets you arrange to get warnings when
5345 malloc is running out of memory to allocate, like Emacs gives you.
5347 * The C library now contains the relocating allocator used in Emacs 19 for
5348 its editing buffers. This allocator (ralloc) minimizes allocation
5349 overhead and fragmentation by moving allocated regions around whenever it
5350 needs to. You always refer to a ralloc'd region with a "handle" (a
5351 pointer to a pointer--an object of type `void **').
5353 * There is a new `printf' format: `%m' gives you the string corresponding
5354 to the error code in `errno'.
5356 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
5357 or `%[' conversion, but instead of filling in a fixed-sized buffer you
5358 pass, the `a' modifier says to fill in a `char **' you pass with a
5361 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
5362 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
5363 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
5365 * `mkstemp' is a traditional Unix function to atomically create and open a
5366 uniquely-named temporary file.
5370 * The standard location for the file that says what the local timezone is
5371 has changed again. It is now `/usr/local/etc/localtime' (or more
5372 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
5374 * The distribution no longer contains any files with names longer than 14
5377 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
5378 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
5380 * New functions `ttyslot' and `syslog' from 4.4 BSD.
5384 * The configuration process has changed quite a bit. The `configure'
5385 script is now used just like the configuration scripts for other GNU
5386 packages. The `sysdeps' directory hierarchy is much rearranged.
5387 The file `INSTALL' explains the new scheme in detail.
5389 * The header files no longer need to be processed into ANSI C and
5390 traditional C versions. There is just one set of files to install, and
5391 it will work with ANSI or old C compilers (including `gcc -traditional').
5393 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
5394 MIPS DECStation running Ultrix 4.
5396 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
5397 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
5398 made itself into a shared library.
5400 * Yet further improved support for the i386, running 4.3 BSD-like systems
5401 (such as Mach 3 with the Unix single-server), or System V.
5403 * New function `strncasecmp' to do case-insensitive string comparison
5404 with limited length.
5406 * New function `strsep' is a reentrant alternative to `strtok'.
5408 * New functions `scandir' and `alphasort' for searching directories.
5410 * New function `setenv' is a better interface to `putenv'.
5412 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
5413 function for traversing a directory tree.
5415 * The GNU obstack package is now also part of the C library.
5416 The new function `open_obstack_stream' creates a stdio stream that
5417 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
5418 formatted output directly to an obstack.
5420 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
5421 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
5423 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
5425 * The new functions `strfry' and `memfrob' do mysterious and wonderful
5426 things to your strings.
5428 * There are some new test programs: test-fseek, testmb, and testrand.
5430 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
5431 These ports are not finished, but are a good starting place for really
5432 supporting those systems.
5434 * `/etc/localtime' is now the standard location for the file that says what
5435 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
5436 This follows the general principle that `/etc' is the place for all local
5437 configuration files.
5439 * The C library header files now use `extern "C"' when used by the C++
5440 compiler, so the C library should now work with C++ code.
5442 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
5443 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
5446 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
5447 function which uses the `merge sort' algorithm, and is said to be
5448 significantly faster than the old GNU `qsort' function. Merge sort is
5449 now the standard `qsort' function. The new algorithm can require a lot
5450 of temporary storage; so, the old sorting function is called when the
5451 required storage is not available.
5453 * The C library now includes Michael Glad's Ultra Fast Crypt, which
5454 provides the Unix `crypt' function, plus some other entry points.
5456 * The code and header files taken from 4.4 BSD have been updated with the
5457 latest files released from Berkeley.
5459 ----------------------------------------------------------------------
5460 Copyright information:
5462 Copyright (C) 1992-2019 Free Software Foundation, Inc.
5464 Permission is granted to anyone to make or distribute verbatim copies
5465 of this document as received, in any medium, provided that the
5466 copyright notice and this permission notice are preserved,
5467 thus giving the recipient permission to redistribute in turn.
5469 Permission is granted to distribute modified versions
5470 of this document, or of portions of it,
5471 under the above conditions, provided also that they
5472 carry prominent notices stating who last changed them.
5475 version-control: never