1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 6652, 10672, 12847, 12926, 13862, 14132, 14138, 14171, 14498, 15215,
13 15884, 16009, 16191, 16469, 16617, 16619, 16657, 16740, 16857, 17192,
14 17266, 17273, 17344, 17363, 17370, 17371, 17411, 17460, 17475, 17485,
15 17501, 17506, 17508, 17522, 17555, 17570, 17571, 17572, 17573, 17574,
16 17582, 17583, 17584, 17585, 17589, 17594, 17601, 17608, 17616, 17625,
17 17630, 17633, 17634, 17635, 17647, 17653, 17657, 17658, 17664, 17665,
18 17668, 17682, 17717, 17719, 17722, 17723, 17724, 17725, 17732, 17733,
19 17744, 17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781, 17782,
20 17791, 17793, 17796, 17797, 17803, 17806, 17834
22 * Optimized strcpy, stpcpy, strncpy, stpncpy implementations for
23 powerpc64/powerpc64le.
25 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
26 and powerpc64le. This may improve lock scaling of existing programs on
27 HTM capable systems. The lock elision code is only enabled with
28 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
29 powerpc will issue a transaction abort on every syscall to avoid side
30 effects being visible outside transactions.
32 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
33 AArch64. Contributed by ARM Ltd.
35 * i386 memcpy functions optimized with SSE2 unaligned load/store.
37 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
38 under certain input conditions resulting in the execution of a shell for
39 command substitution when the applicaiton did not request it. The
40 implementation now checks WRDE_NOCMD immediately before executing the
41 shell and returns the error WRDE_CMDSUB as expected.
43 * CVE-2012-3406 printf-style functions could run into a stack overflow when
44 processing format strings with a large number of format specifiers.
46 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
47 infinite loop if the DNS response contained a PTR record of an unexpected
50 * The minimum GCC version that can be used to build this version of the GNU
51 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
52 still be used to compile programs using the GNU C Library.
54 * The GNU C Library is now built with -Werror by default. This can be
55 disabled by configuring with --disable-werror.
57 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
59 * The obsolete sigvec function has been removed. This was the original
60 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
61 programs have been using instead for about 25 years. Of course, ABI
62 compatibility for old binaries using sigvec remains intact.
64 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
65 with newer versions of bison.
67 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
68 The original MIPS o32 hard-float ABI requires an FPU where double-precision
69 registers overlay two consecutive single-precision registers. MIPS32R2
70 introduced a new FPU mode (FR=1) where double-precision registers extend the
71 corresponding single-precision registers which is incompatible with the
72 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
73 require the use of FR=1 making a transition necessary. New o32 ABI
74 extensions enable users to migrate over time from the original o32 ABI
75 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
76 tracks the ABI of any loaded object and verifies that new objects are
77 compatible. Mode transitions will also be requested as required and
78 unsupportable objects will be rejected. The ABI checks include both soft and
79 hard float ABIs for o32, n32 and n64.
81 GCC 5 with GNU binutils 2.25 onwards:
82 It is strongly recommended that all o32 system libraries are built using the
83 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
84 with the original and all new o32 ABI extensions. Configure a MIPS GCC
85 compiler using --with-fp-32=xx to set this by default.
89 * The following bugs are resolved with this release:
91 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
92 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
93 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
94 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
95 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
96 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
97 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
98 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
99 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
100 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
101 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
102 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
103 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
104 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
105 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
107 * Reverted change of ABI data structures for s390 and s390x:
108 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
109 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
110 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
111 are preserved pointing straight to the same implementation as the old ones.
112 Given that, new callers will simply provide a too-big buffer to these
113 functions. Any applications/libraries out there that embed jmp_buf or
114 ucontext_t in an ABI-relevant data structure that have already been rebuilt
115 against 2.19 headers will have to rebuilt again. This is necessary in any
116 case to revert the breakage in their ABI caused by the glibc change.
118 * Support for file description locks is added to systems running the
119 Linux kernel. The standard file locking interfaces are extended to
120 operate on file descriptions, not file descriptors, via the use of
121 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
122 are associated with an open file instead of a process.
124 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
126 * The minimum Linux kernel version that this version of the GNU C Library
127 can be used with is 2.6.32.
129 * Running the testsuite no longer terminates as soon as a test fails.
130 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
131 with PASS or FAIL lines for individual tests. A summary of the results is
132 printed, including a list of failing lists, and "make check" exits with
133 error status if there were any unexpected failures. "make check
134 stop-on-test-failure=y" may be used to keep the old behavior.
136 * The am33 port, which had not worked for several years, has been removed
139 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
140 supported; they now act the same as _DEFAULT_SOURCE (but generate a
141 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
142 conflicted with POSIX (support for which was removed in 2.19), the
143 interfaces those macros enabled remain available when compiling with
144 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
147 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
149 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
150 This may improve lock scaling of existing programs on TX capable systems.
151 The lock elision code is only built with --enable-lock-elision=yes and
152 then requires a GCC version supporting the TX builtins. With lock elision
153 default mutexes are elided via __builtin_tbegin, if the cpu supports
154 transactions. By default lock elision is not enabled and the elision code
157 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
158 copy the path argument. This allowed programs to cause posix_spawn to
159 deference a dangling pointer, or use an unexpected pathname argument if
160 the string was modified after the posix_spawn_file_actions_addopen
163 * All supported architectures now use the main glibc sysdeps directory
164 instead of some being in a separate "ports" directory (which was
165 distributed separately before glibc 2.17).
167 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
168 On configurations that support it (all Linux configurations), it's now
169 used regardless of the --enable-add-ons switch to configure. It is no
170 longer possible to build such configurations without pthreads support.
172 * Locale names, including those obtained from environment variables (LANG
173 and the LC_* variables), are more tightly checked for proper syntax.
174 setlocale will now fail (with EINVAL) for locale names that are overly
175 long, contain slashes without starting with a slash, or contain ".." path
176 components. (CVE-2014-0475) Previously, some valid locale names were
177 silently replaced with the "C" locale when running in AT_SECURE mode
178 (e.g., in a SUID program). This is no longer necessary because of the
181 * On x86-64, the dynamic linker's lazy-binding support is now compatible
182 with application code using Intel MPX instructions. (With all previous
183 versions, the MPX register state could be clobbered when making calls
184 into or out of a shared library.) Note that while the new dynamic
185 linker is compatible with all known x86 hardware whether or not it
186 supports Intel MPX, some x86 instruction-set emulators might fail to
187 handle the new instruction encodings. This is known to affect Valgrind
188 versions up through 3.9 (but will be fixed in the forthcoming 3.10
189 release), and might affect other tools that do instruction emulation.
191 * Support for loadable gconv transliteration modules has been removed.
192 The support for transliteration modules has been non-functional for
193 over a decade, and the removal is prompted by security defects. The
194 normal gconv conversion modules are still supported. Transliteration
195 with //TRANSLIT is still possible, and the //IGNORE specifier
196 continues to be supported. (CVE-2014-5119)
198 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
199 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
200 resulting a denial-of-service security vulnerability in applications which
201 use functions related to iconv. (CVE-2014-6040)
205 * The following bugs are resolved with this release:
207 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
208 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
209 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
210 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
211 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
212 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
213 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
214 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
215 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
216 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
217 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
218 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
219 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
220 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
221 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
222 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
223 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
224 16431, 16453, 16474, 16506, 16510, 16529
226 * Slovenian translations for glibc messages have been contributed by the
227 Translation Project's Slovenian team of translators.
229 * The public headers no longer use __unused nor __block. This change is to
230 support compiling programs that are derived from BSD sources and use
231 __unused internally, and to support compiling with Clang's -fblock
232 extension which uses __block.
234 * CVE-2012-4412 The strcoll implementation caches indices and rules for
235 large collation sequences to optimize multiple passes. This cache
236 computation may overflow for large collation sequences and may cause a
237 stack or buffer overflow. This is now fixed to use a slower algorithm
238 which does not use a cache if there is an integer overflow.
240 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
241 rules for large collation sequences to optimize multiple passes and falls
242 back to alloca if malloc fails, resulting in a possible stack overflow.
243 The implementation now falls back to an uncached collation sequence lookup
246 * CVE-2013-4788 The pointer guard used for pointer mangling was not
247 initialized for static applications resulting in the security feature
248 being disabled. The pointer guard is now correctly initialized to a
249 random value for static applications. Existing static applications need
250 to be recompiled to take advantage of the fix (bug 15754).
252 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
253 to the d_name member of struct dirent, or omit the terminating NUL
254 character. (Bugzilla #14699).
256 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
257 aligned_alloc functions could allocate too few bytes or corrupt the
258 heap when passed very large allocation size values (Bugzilla #15855,
261 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
262 for AF_INET6 has been fixed (Bugzilla #16072).
264 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
265 pap_CW, quz_PE, the_NP.
267 * Substantially revised locales: gd_GB, ht_HT
269 * The LC_ADDRESS field was updated to support country_car for almost all
272 * ISO 1427 definitions were updated.
274 * ISO 3166 definitions were updated.
276 * The localedef utility now supports --big-endian and --little-endian
277 command-line options to generate locales for a different system from that
278 for which the C library was built.
280 * Binary locale files now only depend on the endianness of the system for
281 which they are generated and not on other properties of that system. As a
282 consequence, binary files generated with new localedef may be incompatible
283 with old versions of the GNU C Library, and binary files generated with
284 old localedef may be incompatible with this version of the GNU C Library,
285 in the following circumstances:
287 + Locale files may be incompatible on m68k systems.
289 + Locale archive files (but not separate files for individual locales) may
290 be incompatible on systems where plain "char" is signed.
292 * The configure option --disable-versioning has been removed. Builds with
293 --disable-versioning had not worked for several years.
295 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
296 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
298 * SystemTap probes for malloc have been introduced.
300 * SystemTap probes for slow multiple precision fallback paths of
301 transcendental functions have been introduced.
303 * Support for powerpc64le has been added.
305 * The soft-float powerpc port now supports e500 processors.
307 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
309 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
310 set of header declarations that are enabled by default, even when other
311 feature test macros or compiler options such as -std=c99 would otherwise
312 disable some of those declarations.
314 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
315 conflict with POSIX. The libbsd-compat library (which was a dummy library
316 that did nothing) has also been removed.
318 * Preliminary documentation about Multi-Thread, Async-Signal and
319 Async-Cancel Safety has been added.
321 * Change of ABI data structures for s390 and s390x:
322 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
323 allow for future hardware extensions. All library functions that accept or
324 return these structures were versioned in order to provide backwards
325 compatibility with existing code. However, not all cases can be handled
326 with interface versioning. If an application embeds either structure into
327 another structure and that structure is passed to another compilation unit
328 which expects the newer larger-sized object then any access to the new
329 fields will result in undefined behaviour. Similarly any access to fields
330 that were moved by the enlarging of the structures will cause undefined
331 behaviour. To fix the undefined behaviour all objects that are part of the
332 final in-memory image must agree on the size of structures, and this may
333 require recompilation.
337 * The following bugs are resolved with this release:
339 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
340 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
341 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
342 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
343 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
344 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
345 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
346 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
347 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
348 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
349 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
350 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
351 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
354 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
355 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
356 Distributions can re-enable building and using pt_chown via the new configure
357 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
358 considerable security risks and should only be used if the distribution
359 understands and accepts the risks.
361 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
364 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
365 fixed (Bugzilla #15330).
367 * Add support for calling C++11 thread_local object destructors on thread
368 and program exit. This needs compiler support for offloading C++11
369 destructor calls to glibc.
371 * Improved worst case performance of libm functions with double inputs and
374 * Support for priority inherited mutexes in pthread condition variables on
375 non-x86 architectures.
377 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
379 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
381 * Optimized string functions for ARM. Implemented by Will Newton and
384 * Optimized libm functions for SPARC. Implemented by David S. Miller.
386 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
389 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
390 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
392 * Added a benchmark framework to track performance of functions in glibc.
394 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
395 It is based on draft TS 18661 and currently enabled as a GNU extension.
397 * On Linux, the clock function now uses the clock_gettime system call
398 for improved precision, rather than old times system call.
400 * Added support for version-3 tz format files. This is needed when using
401 the tz database release 2013e or later, and affects a few unusual cases --
402 currently only TZ='America/Godthab' for time stamps after 2037.
404 * Added new API functions pthread_getattr_default_np and
405 pthread_setattr_default_np to get and set the default pthread
406 attributes of a process.
408 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
409 This may improve lock scaling of existing programs on TSX capable systems.
410 When the --enable-lock-elision=yes parameter is specified at configure
411 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
414 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
415 availability). Implemented by Ryan S. Arnold.
417 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
421 * The following bugs are resolved with this release:
423 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
424 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
425 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
426 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
427 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
428 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
429 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
430 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
431 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
432 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
433 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
434 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
435 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
436 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
437 14879, 14889, 14893, 14898, 14914.
439 * Optimization of memcpy for MIPS.
441 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
442 EMFILE has been fixed (Bugzilla #14889).
444 * The add-on ports collection is now distributed in the "ports" subdirectory
445 of the main GNU C Library distribution, rather than separately.
447 * Port to ARM AArch64 contributed by Linaro.
449 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
450 Optimized versions of memcpy, memset, and memcmp added for System z10 and
452 Implemented by Andreas Krebbel.
454 * The new function secure_getenv allows secure access to the environment,
455 returning NULL if running in a SUID/SGID process. This function replaces
456 the internal function __secure_getenv.
458 * SystemTap static probes have been added into the dynamic linker.
459 Implemented by Gary Benson.
461 * Optimizations of string functions strstr, strcasestr and memmem.
462 Implemented by Maxim Kuvyrkov.
464 * The minimum Linux kernel version that this version of the GNU C Library
465 can be used with is 2.6.16.
467 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
468 powerpc POWER7. Implemented by Will Schmidt.
470 * New configure option --disable-nscd builds the C library such that it
471 never attempts to contact the Name Service Caching Daemon (nscd).
472 New configure option --disable-build-nscd avoids building nscd itself;
473 this is the default if --disable-nscd is used.
475 * Improved support for cross-compilation, including cross-testing and
476 bootstrap builds without a previously built glibc.
478 * Several testsuite tests are now able to test multiple IFUNC variants of an
479 interface, rather than just testing the one that would be chooen by
482 * New configure options --with-bugurl and --with-pkgversion, for
483 distributors to use to embed their bug-reporting and package version
484 information in --help and --version output.
486 * The ttyname and ttyname_r functions on Linux now fall back to searching for
487 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
488 allows creation of chroots without the procfs mounted on /proc.
490 * The `crypt' function now fails if passed salt bytes that violate the
491 specification for those values. On Linux, the `crypt' function will
492 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
493 enabled, and fail on encrypted strings using the MD5 or DES algorithm
494 when the mode is enabled.
496 * The `clock_*' suite of functions (declared in <time.h>) is now available
497 directly in the main C library. Previously it was necessary to link with
498 -lrt to use these functions. This change has the effect that a
499 single-threaded program that uses a function such as `clock_gettime' (and
500 is not linked with -lrt) will no longer implicitly load the pthreads
501 library at runtime and so will not suffer the overheads associated with
502 multi-thread support in other code such as the C++ runtime library.
504 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
509 * The following bugs are resolved with this release:
511 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
512 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
513 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
514 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
515 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
516 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
517 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
518 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
519 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
520 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
521 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
522 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
523 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
524 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
525 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
526 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
527 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
528 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
529 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
530 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
531 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
532 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
535 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
536 configuring glibc with:
537 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
538 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
539 Implemented by H.J. Lu.
543 + define static_assert
545 + do not declare gets
547 + declare at_quick_exit and quick_exit also for ISO C11
549 + aligned_alloc. NB: The code is deliberately allows the size parameter
550 to not be a multiple of the alignment. This is a moronic requirement
551 in the standard but it is only a requirement on the caller, not the
556 + uchar.h support added
558 + CMPLX, CMPLXF, CMPLXL added
560 Implemented by Ulrich Drepper.
562 * Support for the IA-64 has been moved to ports.
564 * Remove support for anything but ELF binary format
566 * Checking versions of poll, ppoll added.
567 Implemented by Ulrich Drepper.
569 * More generic and 64-bit performance optimizations to math functions.
570 Implemented by Ulrich Drepper.
572 * New configure option --enable-obsolete-rpc makes the deprecated RPC
573 headers and functions available at compile time as they were before
574 version 2.14. This option will be removed at some time in the future
575 after the TI-RPC library becomes fully sufficient for the needs of
576 existing applications.
578 * Compatibility code for Linux kernel versions before 2.4 has been removed.
579 Note that glibc is not expected to work with any Linux kernel version
582 * New header <sys/auxv.h> and function getauxval allowing easy access to
583 the AT_* key-value pairs passed from the Linux kernel. The header also
584 defines the HWCAP_* bits associated with the AT_HWCAP key.
586 * New locales: mag_IN
588 * New configure option --enable-systemtap builds SystemTap static probes
589 into libc for setjmp and longjmp and into libpthread for various operations.
590 So far the setjmp/longjmp probes and some of the libpthread probes are
591 provided only for i*86 and x86_64.
592 Implemented by Roland McGrath and Rayson Ho.
594 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
596 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
599 * More optimized functions for SPARC. Implemented by David S. Miller.
601 * Improved support for cross-compilation, especially bootstrap builds
602 without a previously built glibc.
604 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
605 Chris Metcalf from Tilera.
607 * Support for the old ARM ABI has been removed from ports. Only the EABI is
608 now supported for ARM processors.
610 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
611 as the name of the dynamic linker, to distinguish it from the
612 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
614 * Support for CRIS has been removed from ports.
616 * A new class of installed header has been documented for low-level
617 platform-specific functionality. PowerPC added the first instance with a
618 function to provide time base register access. Contributed by Tulio
619 Magno Quites Machado Filho.
621 * ix86 configurations now install header files that are consistent with
622 what x86-64 configurations install. These same header files can be used
623 for -m32, -m64, or -mx32 builds.
624 Contributed by H.J. Lu.
626 * Math library bug fixes. A thorough audit of all open math library bugs was
627 conducted by Joseph Myers. Significant progress was made on many math
628 library bugs resulting in more accurate exceptions and function results.
629 Many thanks to all those that contributed including Andreas Jaeger for his
630 patch review and work on the x87 trigonometric instruction issues.
632 * Timezone data is no longer installed. Timezone-related binaries and scripts
633 will continue to be installed. Users should obtain their timezone data from
634 their distribution provider or from the tzdata package at
635 <ftp://munnari.oz.au/pub/>.
639 * The following bugs are resolved with this release:
641 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
642 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
643 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
644 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
645 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
646 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
647 13484, 13506, 13515, 13523, 13524, 13538, 13540
649 * New program pldd to list loaded object of a process
650 Implemented by Ulrich Drepper.
652 * Add nss_db support back to glibc. No more dependency on Berkeley db
653 and support for initgroups lookups.
654 Implemented by Ulrich Drepper.
656 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
657 Contributed by HJ Lu.
659 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
660 Contributed by HJ Lu.
662 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
663 on x86-32 and x86-64.
664 Contributed by Liubov Dmitrieva.
666 * Optimized strchr and strrchr for SSE on x86-32.
667 Contributed by Liubov Dmitrieva.
669 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
670 for x86-64 and x86-32.
671 Contributed by Liubov Dmitrieva.
673 * New interfaces: scandirat, scandirat64
674 Implemented by Ulrich Drepper.
676 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
677 Implemented by Ulrich Drepper.
679 * nscd now also caches the netgroup database.
680 Implemented by Ulrich Drepper.
682 * Integrate libm with gcc's -ffinite-math-only option.
683 Implemented by Ulrich Drepper.
685 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
686 to math functions. Implemented by Ulrich Drepper.
688 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
689 Implemented by Ulrich Drepper.
691 * New Linux interfaces: process_vm_readv, process_vm_writev
693 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
694 Implemented by Ulrich Drepper.
696 * Optimized nearbyint and strcasecmp for PPC.
697 Implemented by Adhemerval Zanella.
699 * New locales: bho_IN, unm_US, es_CU, ta_LK
703 * The following bugs are resolved with this release:
705 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
706 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
707 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
708 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
709 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
710 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
711 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
712 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
713 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
714 12795, 12811, 12813, 12814, 12841
716 * The RPC implementation in libc is obsoleted. Old programs keep working
717 but new programs cannot be linked with the routines in libc anymore.
718 Programs in need of RPC functionality must be linked against TI-RPC.
719 The TI-RPC implementation is IPv6 enabled and there are other benefits.
721 Visible changes of this change include (obviously) the inability to link
722 programs using RPC functions without referencing the TI-RPC library and the
723 removal of the RPC headers from the glibc headers.
724 Implemented by Ulrich Drepper.
726 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
727 syncfs, setns, sendmmsg
729 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
730 yue_HK, lij_IT, mhr_RU
732 * New encodings: CP770, CP771, CP772, CP773, CP774
734 * New program sotruss to trace calls through PLTs
735 Implemented by Ulrich Drepper.
737 * The malloc hook implementation is marked deprecated and will be removed
738 from the default implementation in the next version. The design never
739 worked ever since the introduction of threads. Even programs which do
740 not create threads themselves can use multiple threads created internally.
744 * The following bugs are resolved with this release:
746 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
747 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
748 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
749 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
752 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
754 * POWER7 optimizations: memset, memcmp, strncmp
756 * New optimized string functions for x86-64: strnlen (SSE2),
757 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
758 Implemented by Ulrich Drepper.
762 * The following bugs are resolved with this release:
764 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
765 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
766 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
767 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
768 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
769 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
770 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
771 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
773 * New interfaces: pthread_getname_np, pthread_setname_np
775 * New Linux interface: recvmmsg
777 * STT_GNU_IFUNC implemented for Sparc by David Miller.
779 * The dynamic linker now recognizes supported ABI versions from the
780 EI_ABIVERSION field in the ELF header.
781 Implemented by Ulrich Drepper.
783 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
784 will not be used to fill in password fields in the passwd.byname replies.
785 Instead it is used to synthesize the shadow.byname table, should it be
786 missing. This is a useful mode in some installations involving Solaris.
787 Implemented by Ulrich Drepper.
789 * New locales: kok_IN, sq_MK, cv_RU
793 * The following bugs are resolved with this release:
795 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
796 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
797 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
798 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
799 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
800 10789, 10817, 10823, 10840, 10847
802 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
804 Implemented by Ulrich Drepper.
806 * Checking version of longjmp added that fails if an uninitialized stack
807 frame would be created. Implemented by Ulrich Drepper.
809 * STT_GNU_IFUNC is now supported in static executables.
810 Implemented by H.J. Lu.
812 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
814 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
815 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
816 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
817 Contributed by H.J. Lu.
819 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
820 Implemented by Ulrich Drepper.
822 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
824 Contributed by H.J. Lu.
826 * Support for fma instruction in AVX on x86-64.
827 Implemented by H.J. Lu and Ulrich Drepper.
829 * AVX support in x86-64 auditing support in ld.so.
830 Implemented by H.J. Lu.
832 * STB_GNU_UNIQUE support added.
833 Implemented by Ulrich Drepper.
835 * Implement second fallback mode for optimized DNS lookup for even more
836 broken environments. If two requests from the same port are not
837 handled correctly close the socket and open a new one before sending
838 the second request. The 'single-request-reopen' option in /etc/resolv.conf
839 can be used to select this mode right away, instead of rediscovering the
840 necessity is every process again.
841 Implemented by Ulrich Drepper.
843 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
844 Implemented by Adam Tkac.
846 * Optimized iconv conversions for S390x.
847 Implemented by Andreas Krebbel.
849 * Using condvars with PI mutexes is now more efficient due to kernel
850 support for requeueing to PI futexes. NPTL support added for x86-64.
851 Implemented by Ulrich Drepper.
853 * New locales: ps_AF, my_MM
857 * The following bugs are resolved with this release:
859 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
860 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
861 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
862 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
863 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
865 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
866 Implemented by Ulrich Drepper.
868 * New Linux interfaces: accept4, fallocate, fallocate64.
869 Implemented by Ulrich Drepper.
871 * Correct declarations of string function when used in C++ code. This
872 could lead to compile errors for invalid C++ code.
874 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
877 * New POSIX 2008 interface: psiginfo
878 Implemented by Ulrich Drepper.
880 * New ISO C++1x interfaces: quick_exit, at_quick_exit
881 Implemented by Ulrich Drepper.
883 * Support for selecting between multiple function definitions at runtime
884 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
886 * The libcrypt library can now use the hash function implementations in
887 NSS. Implemented by Ulrich Drepper.
889 * The malloc implementation can be compiled to be less memory efficient
890 but higher performing in multi-threaded programs.
891 Implemented by Ulrich Drepper.
893 * New locales: nan_TW@latin, ks_IN
895 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
896 Implemented by Ulrich Drepper.
898 * Extended printf hook support. It is possible to use user-defined types
899 and extend existing format specifiers.
900 Implemented by Ulrich Drepper.
902 * Handling for group shadow files has been added.
903 Implemented by Ulrich Drepper.
905 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
906 servers (the case, e.g., for some people using the built-in DNS
907 server in ADSL modems/routers). There is a once-per-process timeout
908 in case of a broken server. To avoid it, users can run nscd or put
909 'options single-request' in /etc/resolv.conf.
910 Implemented by Ulrich Drepper.
914 * The following bugs are resolved with this release:
916 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
917 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
918 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
919 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
920 6968, 6974, 6980, 6995, 7008, 7009, 7029
922 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
923 up at the same time. Implemented by Ulrich Drepper.
925 * TLS descriptors for LD and GD on x86 and x86-64.
926 Implemented by Alexandre Oliva.
928 * getaddrinfo now handles DCCP and UDPlite.
929 Implemented by Ulrich Drepper.
931 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
932 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
933 Implemented by Ulrich Drepper.
935 * New implementation of memmem, strstr, and strcasestr which is O(n).
936 Implemented by Eric Blake.
938 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
940 * Implement "e" option for popen to open file descriptor with the
941 close-on-exec flag set. Implemented by Ulrich Drepper.
943 * Implement "b" mode for fmemopen. In this mode writes writes don't
944 implicitly add a NUL byte and seeks from the end of the buffer really
945 use the buffer end, not the string length as the basis.
946 Implemented by Ulrich Drepper.
948 * Many functions, exported and internal, now atomically set the close-on-exec
949 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
951 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
953 Implemented by Pravin Satpute.
955 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
959 * The following bugs are resolved with this release:
961 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
962 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
963 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
964 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
965 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
966 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
967 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
969 * New locales: bo_CN, bo_IN, shs_CA.
971 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
973 * Sorting rules for some Indian languages (Devanagari and Gujarati).
974 Implemented by Pravin Satpute.
976 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
978 * nscd caches now all timeouts for DNS entries
979 Implemented by Ulrich Drepper.
981 * nscd is more efficient and wakes up less often.
982 Implemented by Ulrich Drepper.
984 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
985 vdprintf, and obstack_vprintf.
986 Implemented by Jakub Jelinek.
988 * Faster memset for x86-64.
989 Implemented by Harsha Jagasia and H.J. Lu.
991 * Faster memcpy on x86.
992 Implemented by Ulrich Drepper.
994 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
995 Implemented by Ulrich Drepper.
997 * Faster sqrt and sqrtf implemention for some PPC variants.
998 Implemented by Steven Munroe.
1002 * The following bugs are resolved with this release:
1004 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1005 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1006 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1007 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1008 5071, 5103, 5104, 5112, 5113, 5184, 5186
1010 * More checking functions: fread, fread_unlocked, open*, mq_open.
1011 Implemented by Jakub Jelinek and Ulrich Drepper.
1013 * Extend fortification to C++. Implemented by Jakub Jelinek.
1015 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1016 by not recognizing 'a' as a modifier when those specs are requested.
1017 Implemented by Jakub Jelinek.
1019 * PPC optimizations to math and string functions.
1020 Implemented by Steven Munroe.
1022 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1023 options to be passed. Implemented by Ulrich Drepper.
1025 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1027 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1028 Implemented by Ulrich Drepper.
1030 * Handle private futexes in the NPTL implementation.
1031 Implemented by Jakub Jelinek and Ulrich Drepper.
1033 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1034 Implemented by Roland McGrath and Ulrich Drepper.
1036 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1038 * SHA-256 and SHA-512 based password encryption.
1039 Implemented by Ulrich Drepper.
1041 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1042 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1045 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1046 Implemented by Ulrich Drepper.
1050 * The following bugs are resolved with this release:
1052 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1053 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1054 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1055 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1056 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1057 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1058 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1061 * New Linux interfaces: epoll_pwait, sched_getcpu.
1063 * New generic interfaces: strerror_l.
1065 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1069 * The following bugs are resolved with this release:
1071 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1072 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1073 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1074 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1075 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1076 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1077 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1078 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1079 3225, 3251, 3252, 3253, 3273
1081 * For Linux, the sorting of addresses returned by getaddrinfo now also
1082 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1083 Implemented by Ulrich Drepper.
1085 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1086 Implemented by Ulrich Drepper.
1088 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1090 * New iconv module for MIK. Contributed by Alexander Shopov.
1092 * For sites with broken group and/or passwd database, the auto-propagate
1093 option of nscd can prevent creating ID lookup entries from the results
1094 of a name lookup and vice versa. This usually is no problem but some
1095 site might have problems with the default behavior.
1096 Implemented by Ulrich Drepper.
1098 * Iterating over entire database in NIS can be slow. With the
1099 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1100 to trade time for memory. The entire database will be read at once.
1101 Implemented by Ulrich Drepper.
1103 * The interfaces introduced in RFC 3542 have been implemented by
1106 * Support for the new ELF hash table format was added by Ulrich Drepper.
1108 * Support for priority inheritance mutexes added by Jakub Jelinek and
1111 * Support for priority protected mutexes added by Jakub Jelinek.
1113 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1114 or_IN, csb_PL, fy_NL, sr_ME.
1118 * More overflow detection functions.
1120 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1121 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1123 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1124 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1125 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1126 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1127 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1128 by Masahide Washizawa.
1130 * It is now possible to install audit libraries for the dynamic linker using
1131 LD_AUDIT. Implemented by Ulrich Drepper.
1133 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1134 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1135 For a libc and libpthread that works well on Linux 2.4 kernels, we
1136 recommend using the stable 2.3 branch.
1138 * The new function open_wmemstream acts like open_memstream,
1139 but uses a wchar_t wide character buffer.
1141 * The new function ppoll is an improved version of poll, similar to pselect.
1143 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1144 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1145 renameat, unlinkat, linkat, symlinkat, readlinkat.
1147 * New Linux kernel system calls: unshare,
1148 inotify_init, inotify_add_watch, inotify_rm_watch.
1150 * The euidaccess function is now also known by the alias eaccess,
1151 for compatibility with some other systems.
1153 * Timezone data updated to 2006b version.
1157 * The following bugs are resolved with this release:
1159 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1160 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1161 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1162 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1163 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1164 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1166 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1168 * As of this release, GCC 4 can be used to compile the C Library.
1170 * Timezone data updated to 2005m version.
1174 * The following bugs are resolved with this release:
1176 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1177 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1178 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1179 777, 787, 821, 822, 823, 825
1181 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1185 * Support for RFC 3678. Real implementations exist only for Linux so far.
1186 Implemented by Ulrich Drepper.
1188 * nscd can now cache entries persistently. Expiring entries are reloaded.
1189 For speedups the cache can be shared in memory with client processes.
1190 Implemented by Ulrich Drepper.
1192 * nscd can now perform SELinux checks.
1193 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1195 * getaddrinfo queries are now cached. Canonical name lookup is performed
1197 Implemented by Ulrich Drepper.
1199 * The nothrow function attribute is used when headers are used by gcc when
1200 compiling C code. This can avoid significant amounts of exception
1203 * The malloc functions perform more error checking and are stricter when
1204 it comes to reacting on errors. The default action is to terminate
1205 the process after showing an error message. Implemented by Ulrich Drepper.
1207 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1208 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1210 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1211 namespaces using the new function dlmopen(). This feature is of course,
1212 like most other dynamic loading functionality, not available in statically
1213 linked applications. Implemented by Ulrich Drepper.
1215 * Low-overhead boundary checking variants of string and some stdio functions
1216 were added. These are to be used in conjunction with a gcc patch by
1217 Jakub Jelinek which adds calls to these functions if possible.
1218 Implemented by Jakub Jelinek and Ulrich Drepper.
1220 * Old code for several operating systems and machine architectures that
1221 have not been in working condition in a long time have been removed from
1222 the main source tree maintained by the GNU C Library's maintainers.
1223 These files are now reside in the separate `ports' source module
1224 that is usable as an add-on when building the library.
1228 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1229 interrogate the dynamic linker, compatible with the Solaris interface.
1231 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1232 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1234 * getifaddrs now uses the netlink interface on Linux to get its information.
1235 Implemented by Thorsten Kukuk.
1237 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1238 Implemented by Ulrich Drepper.
1240 * support for non-executable stacks on x86 has been added. Changes mostly
1243 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1246 * getaddrinfo now performs destination address selection according to
1251 * Thread-safe interfaces for many functions that access locale data
1252 were added in version 2.3, but these features were omitted from NEWS.
1253 Many functions have variants with an `_l' suffix that take a `locale_t'
1254 object as a parameter rather than consulting the current locale.
1255 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1256 create and maintain `locale_t' objects. Additionally, the new function
1257 `uselocale' sets "the current locale" (as used by functions not so
1258 parameterized) set for an individual thread. These features were added
1259 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1261 * The functions getresuid, getresgid, setresuid, and setresgid, which
1262 have long been available on Linux, are now declared in <unistd.h>
1263 and are now also available on the Hurd.
1265 * ELF thread-local storage support (TLS) now works on x86-64.
1267 * The new dynamic string token $LIB is expanded in shared library names.
1268 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1270 * Aldy Hernandez contributed complete software floating point support for
1271 PowerPC machines with no FPU.
1273 * fexecve is implemented on Linux.
1275 * The `btowc' function should work at least twice as fast due to
1276 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1278 * With approriate thread add-ons cancelable functions are now implemented
1279 in libc.so as well. No need to call the function in libpthread. This
1280 change allowed to finally disable the incorrect and expensive handling
1281 of weak definition in ld.so.
1283 * Yet more PLT entries in libc.so have been removed. We finally arrived
1284 at the bare minimum. Startup times improved appropriately.
1286 * Support for the new Linux/x86 system call interface was added. The
1287 AT_SYSINFO auxiliary vector entry is recognized and handled.
1291 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1294 * iconv (the program and the interface) now accepts empty names (excluding
1295 options like //TRANSLIT) to mean "use charset of current locale".
1297 * localedef can now transliterate characters in strings which are not in
1298 the provided charmap. The information from the input locale is used.
1300 * Prelinking support was added for ELF targets. This requires additional
1301 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1303 * Read-only stdio streams now use mmap to speed up operation by eliminating
1304 copying and buffer underflows. To use add 'm' to the mode string of
1305 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1307 * The malloc functions were completely rewritten by Wolfram Gloger based
1308 on Doug Lea's malloc-2.7.0.c.
1310 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1311 implementation of regex.
1313 * Bruno Haible upgraded the iconv and locale implementation to support
1316 * Contents of the LC_* and LANG environment variables in the CEN style are
1317 not recognized anymore. It never was used. Change by Ulrich Drepper.
1319 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1320 thread-local storage (TLS) ABI on some platforms.
1321 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1323 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1324 EUC-JISX0213, and TSCII.
1326 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1327 BSD-compatible interface for getting all network interface addresses.
1328 Implementation for IPv4 by Roland McGrath.
1330 * Loading of locale data is faster due to the introduction of a locale
1331 archive. Implemented by Roland McGrath and Ulrich Drepper.
1333 * Startup times are significantly reduced by not using exported functions
1334 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1337 * Steven Munroe contributed a port to PowerPC64/Linux.
1341 * The Hurd now uses the GNU libio implementation of stdio rather than the
1342 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1344 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1345 with the same behavior as the Linux system call of the same name.
1349 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1350 128-bit long double format.
1352 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1353 IBM1161, and IBM1162 charsets.
1355 * Andreas Jaeger contributed a port to x86-64/Linux.
1357 * Peter Bruin contributed a port to PowerPC/Hurd.
1359 * libc functions using I/O streams now can handle wide-oriented streams
1362 * optimizations in the dynamic linker. Binaries created by recent binutils
1363 versions start up quicker due to reduced time spent on relocations.
1365 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1369 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1370 asinh, atanh, j0 for the 128-bit long double format.
1372 * Bruno Haible updated all the code handling Unicode in some form to
1373 support Unicode 3.1.
1375 * Speed of regex for single-byte locales is back to previous levels.
1376 Patch by Isamu Hasegawa.
1378 * Alpha, SPARC, and IA-64 now also using floating stacks.
1380 * Startup time of internationalized applications greatly improved through
1381 iconv cache. Use iconvconfig to generate the cache file.
1382 Contributed by Ulrich Drepper.
1384 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1385 severe performance problems. Patch by David Mosberger.
1387 * The Hurd port got a lot more functionality like AIO, various stdio
1388 extensions, etc. Mainly done by Roland McGrath.
1390 * mtrace can now lookup symbols in shared libraries.
1394 * Intel's IA-64 math library is largely integrated. It provides fast and
1395 accurate implementatations for most basic and standard math functions
1396 in float, double, and long double format.
1398 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1399 and asin for the 96-bit long double format and asin, log, tan for the
1400 128-bit long double format.
1402 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1403 The basic double functions exist today. Contributed by Abraham Ziv
1404 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1405 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1407 * An asynchronous name lookup library was added. The interface is designed
1408 after POSIX AIO. The proposal was circulated beforehand to get comments.
1409 No negative ones came in. Implemented by Ulrich Drepper.
1411 * Port to S390/64bit contributed by Martin Schwidefsky
1412 <schwidefsky@de.ibm.com>.
1414 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1415 of functions for Linux/IA-64.
1417 * The RPC code is now thread safe. Threads can now use the same service
1418 of different services at the same time. Patch by Eric Norum
1419 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1421 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1422 family of functions for Linux/S390.
1424 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1425 of functions for Linux/x86.
1427 * Port to Linux/CRIS contributed by Axis Communications.
1431 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1432 we can now check for namespace violations and missing declarations. The
1433 result is that almost all headers are now Unix-compliant (as defined in
1434 the upcoming XPG6). The negative side is that some programs might need
1435 corrections, too, if they depend on the incorrect form of the headers in
1436 previous versions which defined too many symbols and included too many
1439 * regex now handles multibyte character sets correctly.
1440 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1442 * iconv (the program) does now conform to the upcoming XPG6 and handles
1443 charmaps. Instead of the charset names the path of charmaps can be
1444 provided and the conversion happens based on this data.
1445 Contributed by Ulrich Drepper.
1447 * The locale program now provides detailed information about the installed
1452 only lists the names of the supported locales
1456 provides details such as country, language, and codeset name.
1457 Contributed by Ulrich Drepper.
1461 * The gencat program now parses the input file according to the charset
1462 selected by the LC_CTYPE category. This is important for stateful
1463 character sets. To make generating catalogs easier there is a way
1464 to overwrite the charset selected by the locale: before the first
1465 message or $ quote line the catalog can contain a line like
1467 $ codeset=ISO-8859-2
1469 to select the charset (ISO-8859-2 in this case).
1471 Implemented by Shinya Hanataka and Ulrich Drepper.
1473 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1474 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1475 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1477 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1478 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1480 * The LANGUAGE environment variable is now ignored unless the locale is
1481 changed from the default "C" locale.
1483 * The usual bug fixes.
1487 * Greg McGary added runtime support for bounds checking using gcc's
1488 new -fbounded-pointers option. ix86 target is complete. PowerPC
1491 * Thorsten Kukuk added secure mode support to nscd.
1493 * The Berkeley db libraries have been removed.
1495 Related, the nss_db module is now in a separate package since it
1496 obviously requires a database library being available.
1498 * Wide character I/O streams implemented by Ulrich Drepper.
1500 * Functions from the extended socket API added by Ulrich Drepper.
1502 * Functions feenableexcept and fedisableexcept to control the
1503 behaviour of individual exceptions have been added by Andreas Jaeger.
1505 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1507 * The resolver code has been updated from bind 8.2.3-T5B which supports
1508 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1511 This change could in some situations effect backward compatibility. Since
1512 now `_res' is a thread-local instead of a global variable, modifying it
1513 in one thread does not have any effect in other threads.
1515 The resolver library was also extended to allow IPv6 as the transport
1516 protocol for the requests. This work was done by Stig Venaas.
1518 * Compatibility code for K&R C compilers has been removed from the
1519 header files. A ISO C compiler is needed to use the library
1520 (conforming to either C89 or C99 standard).
1522 * Complete rewrite of the localedef program to support multibyte character
1523 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1524 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1525 Implemented by Ulrich Drepper.
1527 Bruno Haible significantly improved the generation and use of the data
1528 structures for the wide character tables.
1530 * Plural handling in gettext implemented by Ulrich Drepper.
1532 * The utmp daemon has been removed.
1534 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1536 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1539 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1541 * POSIX barriers implemented by Kaz Kylheku.
1543 * POSIX spawn function family implemented by Ulrich Drepper.
1545 * POSIX spinlocks are now available.
1547 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1549 * the configure option --enable-kernel=X.Y.Z allows to strip out
1550 compatibility for kernel versions before X.Y.Z. This is currently only
1551 implemented for Linux.
1553 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1554 field sin6_scope_id. This means that all programs using IPv6 should be
1555 recompiled. Don't expect binary compatibility with previous glibc
1558 * various conversion modules for IBM character sets contributed by
1561 * IA-64 port by Jes Sorensen and HJ Lu.
1575 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1577 * New xdr functions are added; some rpc functions are now 64bit clean.
1579 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1581 * Fixed known incompatibilities with glibc 2.0.
1583 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1585 * Optimized a number of functions (especially the ELF dynamic loader).
1587 * Update timezone data files.
1589 * lots of charmaps corrections
1591 * some new locale definitions and charmaps
1596 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1597 conform to POSIX member type requirements. Symbol versions have been
1598 adjusted as needed within the library, and for direct use by applications,
1599 but there is potential for problems if third-party libraries use
1600 struct timeval as part of their interface. This does not present
1601 a problem for X and other "essential" system libraries.
1603 * An additional locale model to support C++ Standard Library locale
1604 model and probably more was implemented by Ulrich Drepper.
1606 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1609 * Miles Bader provided the `argp' function family to support hierachical
1610 command line argument parsing, layered on top of getopt.
1612 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1614 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1617 * scanf recognizes the %a and %A format for scanning floating point numbers.
1619 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1620 information and interfaces for the available integer types.
1622 * about 130 new math functions were added to implement the ISO C9x math
1625 * the new header <complex.h> contains definitions of the complex math
1626 functions from ISO C 9X.
1628 * the new header <tgmath.h> defines generic macros to use complex or
1629 real valued functions.
1631 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1633 * Andreas Jaeger provided a test suite for the math library.
1635 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1637 * Ulrich Drepper added character set conversion functions (iconv).
1639 * Optimized string functions have been added.
1641 * The localedata addon is now part of glibc.
1643 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1645 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1646 daemon for NSS (nscd).
1648 Missing a better place here are some numbers on improvements. Under
1649 Linux 2.1.125 un-tar-ing the kernel sources takes
1653 using local files 12.19s 6.88s 22.91s
1655 using NIS 13.92s 8.91s 26.34s
1657 using NIS & nscd 10.37s 7.34s 25.30s
1659 using NIS+ 27.57s 30.37s 640.46s
1661 using NIS+ & nscd 10.25s 7.83s 26.51s
1663 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1665 Keep in mind that non-namelookup related operations dominate above times.
1666 It was just a common complain that using NIS+ unpacking the kernel is
1669 [1] The old nscd implementation is not available anymore since it was
1670 distributed with glibc up to version 2.0.98 and thus is now replaced.
1672 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1674 * Mark Kettenis provided a Hesiod NSS module.
1676 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1677 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1679 * rcmd can now handle netgroups (Dick Streefland).
1681 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1684 * Support for the IPv6 protocol has been added to the socket API, as per the
1685 latest draft standards.
1687 * Support for Linux 2.2 has been added.
1689 * Interface changes relative to the latest 2.0.x release:
1690 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1691 addseverity NEW: Unix98
1692 alphasort64 NEW: LFS
1693 argp_err_exit_status NEW: argp, GNU ext
1694 argp_error NEW: argp, GNU ext
1695 argp_failure NEW: argp, GNU ext
1696 argp_help NEW: argp, GNU ext
1697 argp_parse NEW: argp, GNU ext
1698 argp_program_bug_address NEW: argp, GNU ext
1699 argp_program_version NEW: argp, GNU ext
1700 argp_program_version_hook NEW: argp, GNU ext
1701 argp_state_help NEW: argp, GNU ext
1702 argp_usage NEW: argp, GNU ext
1703 authdes_create NEW: Secure RPC
1704 authdes_getucred NEW: Secure RPC
1705 authdes_pk_create NEW: Secure RPC
1706 backtrace NEW: GNU ext.
1707 backtrace_symbols NEW: GNU ext.
1708 backtrace_symbols_fd NEW: GNU ext.
1710 cacosf NEW: ISO C 9x
1711 cacosh NEW: ISO C 9x
1712 cacoshf NEW: ISO C 9x
1713 cacoshl NEW: ISO C 9x
1714 cacosl NEW: ISO C 9x
1721 casinf NEW: ISO C 9x
1722 casinh NEW: ISO C 9x
1723 casinhf NEW: ISO C 9x
1724 casinhl NEW: ISO C 9x
1725 casinl NEW: ISO C 9x
1727 catanf NEW: ISO C 9x
1728 catanh NEW: ISO C 9x
1729 catanhf NEW: ISO C 9x
1730 catanhl NEW: ISO C 9x
1731 catanl NEW: ISO C 9x
1732 cbc_crypt NEW: Secure RPC
1736 ccoshf NEW: ISO C 9x
1737 ccoshl NEW: ISO C 9x
1743 cimagf NEW: ISO C 9x
1744 cimagl NEW: ISO C 9x
1745 clearerr_locked REMOVED
1746 clntunix_create NEW: sunrpc ext
1748 clog10 NEW: ISO C 9x
1749 clog10f NEW: ISO C 9x
1750 clog10l NEW: ISO C 9x
1760 cprojf NEW: ISO C 9x
1761 cprojl NEW: ISO C 9x
1763 crealf NEW: ISO C 9x
1764 creall NEW: ISO C 9x
1769 csinhf NEW: ISO C 9x
1770 csinhl NEW: ISO C 9x
1773 csqrtf NEW: ISO C 9x
1774 csqrtl NEW: ISO C 9x
1778 ctanhf NEW: ISO C 9x
1779 ctanhl NEW: ISO C 9x
1781 des_setparity NEW: Secure RPC
1782 ecb_crypt NEW: Secure RPC
1783 endutxent NEW: Unix98
1785 exp10f NEW: ISO C 9x
1786 exp10l NEW: ISO C 9x
1790 fattach NEW: STREAMS
1791 fdetach NEW: STREAMS
1795 feclearexcept NEW: ISO C 9x
1796 fegetenv NEW: ISO C 9x
1797 fegetexceptflag NEW: ISO C 9x
1798 fegetround NEW: ISO C 9x
1799 feholdexcept NEW: ISO C 9x
1801 feraiseexcept NEW: ISO C 9x
1802 ferror_locked REMOVED
1803 fesetenv NEW: ISO C 9x
1804 fesetexceptflag NEW: ISO C 9x
1805 fesetround NEW: ISO C 9x
1806 fetestexcept NEW: ISO C 9x
1807 feupdateenv NEW: ISO C 9x
1808 fflush_locked REMOVED
1812 fgets_unlocked NEW: GNU ext.
1813 fileno_locked REMOVED
1825 fputc_locked REMOVED
1826 fputs_unlocked NEW: GNU ext.
1827 fread_unlocked NEW: GNU ext.
1832 fstatvfs NEW: Unix98
1836 ftruncate64 NEW: LFS
1838 fwrite_unlocked NEW: GNU ext.
1839 gai_strerror NEW: IPv6
1843 getchar_locked REMOVED
1845 getdate_err NEW: Unix98
1846 getdate_r NEW: GNU ext.
1848 getnameinfo NEW: IPv6
1849 getnetname NEW: Secure RPC
1850 getpmsg NEW: STREAMS
1851 getpt NEW: Unix98 PTY
1852 getrlimit64 NEW: LFS
1853 getutxent NEW: Unix98
1854 getutxid NEW: Unix98
1855 getutxline NEW: Unix98
1856 glob64 NEW: GNU ext.
1857 globfree64 NEW: GNU ext.
1858 gnu_get_libc_release NEW: GNU ext.
1859 gnu_get_libc_version NEW: GNU ext.
1860 grantpt NEW: Unix98 PTY
1861 host2netname NEW: Secure RPC
1863 iconv_close NEW: iconv
1864 iconv_open NEW: iconv
1865 if_freenameindex NEW: IPv6
1866 if_indextoname NEW: IPv6
1867 if_nameindex NEW: IPv6
1868 if_nametoindex NEW: IPv6
1869 in6addr_any NEW: IPv6
1870 in6addr_loopback NEW: IPv6
1871 inet6_isipv4mapped NEW: IPv6
1872 isastream NEW: STREAMS
1873 iswblank NEW: GNU ext.
1874 key_decryptsession NEW: Secure RPC
1875 key_decryptsession_pk NEW: Secure RPC
1876 key_encryptsession NEW: Secure RPC
1877 key_encryptsession_pk NEW: Secure RPC
1878 key_gendes NEW: Secure RPC
1879 key_get_conv NEW: Secure RPC
1880 key_secretkey_is_set NEW: Secure RPC
1881 key_setnet NEW: Secure RPC
1882 key_setsecret NEW: Secure RPC
1883 llrint NEW: ISO C 9x
1884 llrintf NEW: ISO C 9x
1885 llrintl NEW: ISO C 9x
1886 llround NEW: ISO C 9x
1887 llroundf NEW: ISO C 9x
1888 llroundl NEW: ISO C 9x
1893 lrintf NEW: ISO C 9x
1894 lrintl NEW: ISO C 9x
1895 lround NEW: ISO C 9x
1896 lroundf NEW: ISO C 9x
1897 lroundl NEW: ISO C 9x
1899 makecontext NEW: Unix98
1900 mempcpy NEW: GNU ext.
1903 modify_ldt NEW: kernel
1907 nearbyint NEW: ISO C 9x
1908 nearbyintf NEW: ISO C 9x
1909 nearbyintl NEW: ISO C 9x
1910 netname2host NEW: Secure RPC
1911 netname2user NEW: Secure RPC
1912 nexttoward NEW: ISO C 9x
1913 nexttowardf NEW: ISO C 9x
1914 nexttowardl NEW: ISO C 9x
1918 passwd2des NEW: Secure RPC
1920 pow10f NEW: GNU ext.
1921 pow10l NEW: GNU ext.
1924 printf_size NEW: GNU ext.
1925 printf_size_info NEW: GNU ext.
1926 profil_counter REMOVED
1927 pthread_mutexattr_getkind_np REPLACED
1928 pthread_mutexattr_setkind_np REPLACED
1929 ptsname NEW: Unix98 PTY
1930 ptsname_r NEW: Unix98 PTY
1932 putchar_locked REMOVED
1933 putgrent NEW: GNU ext.
1935 putpmsg NEW: STREAMS
1936 pututxline NEW: Unix98
1940 readdir64_r NEW: LFS
1941 remquo NEW: ISO C 9x
1942 remquof NEW: ISO C 9x
1943 remquol NEW: ISO C 9x
1945 roundf NEW: ISO C 9x
1946 roundl NEW: ISO C 9x
1948 scalbln NEW: ISO C 9x
1949 scalblnf NEW: ISO C 9x
1950 scalblnl NEW: ISO C 9x
1952 sendfile NEW: kernel
1953 setcontext NEW: Unix98
1954 setrlimit64 NEW: LFS
1955 setutxent NEW: Unix98
1957 sigignore NEW: Unix98
1958 sigqueue NEW: POSIX.1b
1959 sigrelse NEW: Unix98
1960 sigset NEW: POSIX.1b
1961 sigtimedwait NEW: POSIX.1b
1962 sigwaitinfo NEW: POSIX.1b
1963 sincos NEW: GNU ext.
1964 sincosf NEW: GNU ext.
1965 sincosl NEW: GNU ext.
1969 strcasestr NEW: GNU ext.
1970 strtoimax NEW: ISO C 9x
1971 strtoumax NEW: ISO C 9x
1972 strverscmp NEW: GNU ext.
1973 svcauthdes_stats NEW: Secure RPC
1974 svcunix_create NEW: sunrpc etx
1975 svcunixfd_create NEW: sunrpc ext
1976 swapcontext NEW: Unix98
1977 tcgetsid NEW: Unix98 PTY
1978 tdestroy NEW: GNU ext.
1979 tgamma NEW: ISO C 9x
1980 tgammaf NEW: ISO C 9x
1981 tgammal NEW: ISO C 9x
1985 truncf NEW: ISO C 9x
1986 truncl NEW: ISO C 9x
1988 unlockpt NEW: Unix98 PTY
1989 updwtmpx NEW: Unix98
1990 user2netname NEW: Secure RPC
1991 utmpxname NEW: Unix98
1992 versionsort NEW: GNU ext.
1993 versionsort64 NEW: GNU ext.
1995 wcscasecmp NEW: GNU ext.
1996 wcsncasecmp NEW: GNU ext.
1997 wcsnlen NEW: GNU ext.
1998 wcstoimax NEW: ISO C 9x
1999 wcstoll NEW: ISO C 9x
2000 wcstoull NEW: ISO C 9x
2001 wcstoumax NEW: ISO C 9x
2003 wordexp NEW: POSIX.2
2004 wordfree NEW: POSIX.2
2005 write_profiling REMOVED
2006 xdecrypt NEW: Secure RPC
2007 xdr_authdes_cred NEW: Secure RPC
2008 xdr_authdes_verf NEW: Secure RPC
2009 xdr_cryptkeyarg NEW: Secure RPC
2010 xdr_cryptkeyarg2 NEW: Secure RPC
2011 xdr_cryptkeyres NEW: Secure RPC
2012 xdr_getcredres NEW: Secure RPC
2013 xdr_key_netstarg NEW: Secure RPC
2014 xdr_key_netstres NEW: Secure RPC
2015 xdr_keybuf NEW: Secure RPC
2016 xdr_keystatus NEW: Secure RPC
2017 xdr_netnamestr NEW: Secure RPC
2018 xdr_sizeof NEW: Secure RPC
2019 xdr_unixcred NEW: sunrpc ext
2020 xencrypt NEW: Secure RPC
2021 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2032 * inet_ntoa is thread-safe
2034 * updwtmp is moved from libutil to libc
2036 * rewrite of cbrt function
2038 * update of timezone data
2052 * add atoll function
2054 * fix complex problems in Berkeley DB code
2056 * fix math functions
2060 * fixed lots of header problems (especially Linux/GNU specific)
2062 * dynamic loader preserves all registers
2064 * Roland McGrath provided support for handling of auxiliary objects in
2065 the ELF dynamic loader.
2067 * support for parallel builds is improved
2071 * GNU extensions are no longer declared by default. To enable them you
2072 must define the macro `_GNU_SOURCE' in your program or compile with
2075 * The library has changed from using GNU ld symbol aliases to using weak
2076 symbols where available. The ELF object file format supports weak
2077 symbols; GNU ld also supports weak symbols in the a.out format. (There
2078 is also now support for other GNU ld extensions in ELF. Use the
2079 `--with-elf' option to configure to indicate you have ELF, and
2080 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2081 of many files which contained only symbol aliases, reducing the size of
2082 the source and the compiled library; many other files were renamed to
2083 less cryptic names previously occupied by the symbol alias files.
2084 There is a new header file <elf.h> for programs which operate on
2085 files in the ELF format.
2087 * Converted to Autoconf version 2, so `configure' has more options.
2088 Run `configure --help' to see the details.
2090 * The library can now be configured to build profiling, highly-optimized
2091 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2092 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2093 `configure' enable building these extra libraries. The shared library is
2094 built by default when using both ELF and GNU ld. When shared libraries
2095 are enabled, the new library `-ldl' is available for arbitrary run-time
2096 loading of shared objects; its interface is defined in <dlfcn.h>. The
2097 new header file <link.h> gives access to the internals of the run-time
2098 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2099 application of same name on other systems and it provides information
2100 about dynamically linked binaries.
2102 * The C library now provides the run-time support code for profiling
2103 executables compiled with `-pg'. Programs can control the profiling code
2104 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2105 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2106 the support for this file format was contributed by David Mosberger-Tang.
2108 * The math code has been replaced with a math library based on fdlibm from
2109 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2110 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2111 functions. The math functions now reside in a separate library, so
2112 programs using them will need to use `-lm' their linking commands.
2114 * John C. Bowman contributed optimized ix87 assembler inline functions.
2116 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2117 mechanism similar to that found in Solaris 2. This is now used for the
2118 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2119 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2120 file controls what services are used for each individual database. This
2121 works by loading shared libraries with names specified in `nsswitch.conf',
2122 so service modules can be changed or added at any time without even
2123 relinking any program. Currently there are the file, db, and NIS based
2124 NSS services available.
2126 * The new functions `strtoq' and `strtouq' parse integer values from
2127 strings, like `strtol' and `strtoul', but they return `long long int' and
2128 `unsigned long long int' values, respectively (64-bit quantities).
2130 * The new functions `strtof' and `strtold' parse floating-point values from
2131 strings, like `strtod', but they return `float' and `long double' values,
2132 respectively (on some machines `double' and `long double' are the same).
2134 * Ulrich Drepper has contributed new implementations of the floating-point
2135 printing and reading code used in the `printf' family of functions and
2136 `strtod', `strtof', and `strtold'. These new functions are perfectly
2137 accurate, and much faster than the old ones.
2139 * The implementation of the POSIX locale model was completely rewritten by
2140 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2141 to compile the POSIX locale definition.
2143 * The former dummy implementations of the strcoll and strxfrm function are
2144 now replaced by fully functional code contributed by Ulrich Drepper. The
2145 collation information comes from the POSIX locale definitions.
2147 * The new header <langinfo.h> defines an interface for accessing
2148 various locale-dependent data (using the locale chosen with `setlocale').
2150 * Ulrich Drepper has contributed a new suite of functions for operation on
2151 wide-character and multibyte-character strings, in <wchar.h>;
2152 and classification and case conversion of wide characters, in <wctype.h>.
2153 These new functions are conforming to the ISO C, Amendement 1 specification.
2155 * There is now a second implementation of the standard I/O library available.
2156 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2157 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2159 * You can now use positional parameter specifications in format strings
2160 for the `printf' and `scanf' families of functions. For example,
2161 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2162 ``Number 6, Mr Jones''. This is mainly useful when providing different
2163 format strings for different languages, whose grammars may dictate
2164 different orderings of the values being printed. To support this
2165 feature, the interface for `register_printf_handler' has changed; see
2166 the header file <printf.h> for details.
2168 * The `printf' and `scanf' families of functions now understand a new
2169 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2170 to group numbers as indicated by the locale; for `scanf' and friends, this
2171 says to accept as valid only a number with all the proper grouping
2172 separators in the right places. In the default "C" locale, numbers are
2173 not grouped; but locales for specific countries will define the usual
2174 conventions (i.e. separate thousands with `,' in the US locale).
2176 * The pgrp functions have been regularized, slightly incompatibly but much
2177 less confusingly. The core functions are now `getpgid' and `setpgid',
2178 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2179 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2180 provided for compatibility. There is no longer an incompatible `getpgrp'
2181 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2183 * The new header file <fts.h> and suite of functions simplify programs that
2184 operate on directory trees. This code comes from 4.4 BSD.
2186 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2187 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2188 NSS scheme used in glibc.
2190 * There is a new malloc debugging hook `__memalign_hook'.
2192 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2193 `unsigned int' in <sys/types.h>. These are for compatibility only and
2194 their use is discouraged.
2196 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2197 done differently, so that it works even without GNU ld.
2199 * New function `euidaccess' checks allowed access to a file like `access',
2200 but using the effective IDs instead of the real IDs.
2202 * The time zone data files have been updated for the latest and greatest
2203 local time conventions of the countries of the world.
2205 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2208 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2209 for formatting floating-point numbers. They are provided only for
2210 compatibility; new programs should use `sprintf' instead. There are
2211 also equivalent function for the `long double' floating-point type and
2212 all functions also exist in a reentrant form.
2214 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2215 functions for maintaining the login-record files (primarily of use to
2216 system programs such as `login'), and convenient functions for
2217 allocating and initializing a pseudo-terminal (pty) device.
2219 * Ulrich Drepper has contributed new support for System V style
2220 shared memory and IPC on systems that support it.
2222 * Ulrich Drepper has contributed several miscellaneous new functions found
2223 in System V: The `hsearch' family of functions provide an effective
2224 implementation of hash tables; `a64l' and `l64a' provide a very simple
2225 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2228 * Ulrich Drepper has contributed new reentrant counterparts for the
2229 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2231 * Ulrich Drepper has contributed new, highly-optimized versions of several
2232 string functions for the i486/Pentium family of processors.
2234 * Ulrich Drepper has updated the Linux-specific code, based largely
2235 on work done in Hongjiu Lu's version of GNU libc for Linux.
2236 The GNU library now supports Linux versions 2.0.10 and later,
2237 using the ELF object file format (i[3456]86-*-linux).
2239 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2241 * David Mosberger-Tang and Richard Henderson have ported the C library
2242 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2243 dynamic linking support for ELF/Alpha.
2245 * Richard Henderson contributed several Alpha optimized assembler function
2246 for arithmetic and string handling.
2248 * Ulrich Drepper has contributed a new set of message catalog functions to
2249 support multiple languages using the <libintl.h> interface, for use with
2250 his new package GNU gettext. Translation volunteers have contributed
2251 catalogs of the library's messages in Spanish, German, and Korean.
2253 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2254 program and the `catgets' function for reading the catalog files it
2255 creates. (The <libintl.h> interface is preferred; we include the
2256 <nl_types.h> interface using `catgets' only for source compatibility with
2257 programs already written to use it.)
2259 * New header file <values.h> gives SVID-compatible names for <limits.h>
2262 * Various new macros, declarations, and small header files for compatibility
2265 * New function `group_member' is a convenient way to check if a process has
2266 a given effective group ID.
2268 * When using GCC 2.7 and later, the socket functions are now declared in a
2269 special way so that passing an argument of type `struct sockaddr_in *',
2270 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2271 `struct sockaddr *' type, does not generate a type-clash warning.
2273 * New function `error' declared in header file <error.h> is a convenient
2274 function for printing error messages and optionally exiting; this is the
2275 canonical function used in GNU programs. The new functions `err', `warn',
2276 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2277 doing the same thing.
2279 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2280 POSIX.2 `glob' function to do ~ and {...} expansion.
2282 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2283 `clearenv' which is used in POSIX.9 is also available.
2285 * New function `getsid' returns session ID number on systems that support it.
2287 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2288 files <db.h> and <mpool.h> provide a rich set of functions for several
2289 types of simple databases stored in memory and in files, and <ndbm.h> is
2290 an old `ndbm'-compatible interface using the `db' functions. Link with
2291 `-ldb' to get these functions.
2293 * New macro `strdupa' copies a string like `strdup', but uses local stack
2294 space from `alloca' instead of dynamic heap space from `malloc'.
2296 * New function `strnlen' is like `strlen' but searches only a given maximum
2297 number of characters for the null terminator. `stpncpy', `strndup' and
2298 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2301 * New function `statfs' in header <sys/statfs.h>.
2303 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2304 provide convenient functions for operating on blocks of null-terminated
2307 * A new suite of functions in <utmp.h> handle all the details of reading
2308 and writing the utmp file.
2310 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2313 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2314 completely POSIX compliant and also implemented the extended functionality
2315 to handle alternate digit representation and alternate era date formats.
2317 * Ulrich Drepper provided an implementation of the `strptime' function
2318 defined in XPG4.2 which transforms a string into a `struct tm' value.
2320 * Paul Eggert provided the tzselect shell script as part of the timezone
2321 code. The shell script makes it easy to select the correct timezone
2324 * The implementation of the malloc family of functions is completely replaced
2325 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2326 The implementation uses the mmap function (if available) and it is
2327 optimized for the use in multi threaded programs.
2329 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2330 functions. This new functionality is usable by specifying a special
2331 salt string and it is compatible with implementation on *BSD systems.
2333 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2334 `getsubopt' to handle second level command line options, `bsd_signal'
2335 to access BSD style `signal' functionality, the obsolete `regexp' style
2338 * the `lchown' function is available on system which support this
2341 * The implementation of the shadow password handling function was contributed
2344 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2346 * POSIX.1g support was added. The <sys/select.h> header is available,
2347 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2348 implementation of `getaddrinfo'.
2352 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2354 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2355 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2357 * The new function `daemon' from 4.4 BSD is useful for server programs that
2358 want to put themselves in the background.
2360 * Joel Sherrill has contributed support for several standalone boards that
2361 run without an operating system.
2363 * `printf', `scanf' and friends now accept a `q' type modifier for long
2364 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2366 * All of the code taken from BSD (notably most of the math and networking
2367 routines) has been updated from the BSD 4.4-Lite release.
2369 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2371 * The new functions `getdomainname' and `setdomainname' fetch or change the
2372 YP/NIS domain name. These are system calls which exist on systems which
2375 * The time zone data files have been updated for the latest international
2378 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2379 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2383 * The C library now includes support for Sun RPC, from Sun's free
2384 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2385 are included. (There is still no support for YP.)
2387 * Tom Quinn has contributed a port of the C library to SGI machines running
2388 Irix 4 (mips-sgi-irix4).
2390 * The new `lockf' function is a simplified interface to the locking
2391 facilities of `fcntl', included for compatibility.
2393 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2395 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2397 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2400 * The error message printed by `assert' for a failed assertion now includes
2401 the name of the program (if using GNU ld) and the name of the calling
2402 function (with versions of GCC that support this).
2404 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2406 * The library now includes the <sys/mman.h> header file and memory
2407 management functions `mmap', `munmap', `mprotect', `msync', and
2408 `madvise', on systems that support those facilities.
2410 * The interface for `mcheck' has changed slightly: the function called to
2411 abort the program when an allocation inconsistency is detected now takes
2412 an argument that indicates the type of failure. The new function
2413 `mprobe' lets you request a consistency check for a particular block at
2414 any time (checks are normally done only when you call `free' or `realloc'
2417 * It is now possible to easily cross-compile the C library, building on one
2418 system a library to run on another machine and/or operating system. All
2419 you need to do is set the variable `HOST_CC' in `configparms' to the
2420 native compiler for programs to run on the machine you are building on (a
2421 few generator programs are used on Unix systems); set `CC' to the
2424 * The new function `fexecve' (only implemented on the GNU system) executes
2425 a program file given a file descriptor already open on the file.
2429 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2430 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2432 * You can set the variable `libprefix' in `configparms' to specify a prefix
2433 to be prepended to installed library files; this makes it easy to install
2434 the GNU C library to be linked as `-lgnuc' or whatever.
2436 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2437 copies a limited number of characters from a string, and returns the
2438 address of the last character written.
2440 * You no longer need to check for whether the installed `stddef.h' is
2441 compatible with the GNU C library. configure now checks for you.
2443 * You can now define a per-stream `fileno' function to convert the
2444 stream's cookie into an integral file descriptor.
2446 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2447 allocates zero bytes of storage, and returns a unique pointer which
2448 you can pass to `realloc' or `free'. The behavior is undefined if
2449 you dereference this pointer.
2451 * The C library now runs on Sony NEWS m68k machines running either
2452 NewsOS 3 or NewsOS 4.
2454 * The new `syscall' function is a system-dependent primitive function
2455 for invoking system calls. It has the canonical behavior on Unix
2456 systems, including unreliable return values for some calls (such as
2457 `pipe', `fork' and `getppid').
2459 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2460 to `EAGAIN', which is the preferred name. On systems whose kernels
2461 use two distinct codes, the C library now translates EWOULDBLOCK to
2462 EAGAIN in every system call function.
2466 * The GNU C Library Reference Manual is now distributed with the library.
2467 `make dvi' will produce a DVI file of the printed manual.
2468 `make info' will produce Info files that you can read on line using C-h i
2469 in Emacs or the `info' program.
2470 Please send comments on the manual to bug-glibc-manual@gnu.org.
2472 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2474 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2476 * Jason Merrill has contributed a port to the Sequent Symmetry running
2477 Dynix version 3 (i386-sequent-dynix).
2479 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2480 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2482 * New function `memory_warnings' lets you arrange to get warnings when
2483 malloc is running out of memory to allocate, like Emacs gives you.
2485 * The C library now contains the relocating allocator used in Emacs 19 for
2486 its editing buffers. This allocator (ralloc) minimizes allocation
2487 overhead and fragmentation by moving allocated regions around whenever it
2488 needs to. You always refer to a ralloc'd region with a "handle" (a
2489 pointer to a pointer--an object of type `void **').
2491 * There is a new `printf' format: `%m' gives you the string corresponding
2492 to the error code in `errno'.
2494 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2495 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2496 pass, the `a' modifier says to fill in a `char **' you pass with a
2499 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2500 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2501 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2503 * `mkstemp' is a traditional Unix function to atomically create and open a
2504 uniquely-named temporary file.
2508 * The standard location for the file that says what the local timezone is
2509 has changed again. It is now `/usr/local/etc/localtime' (or more
2510 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2512 * The distribution no longer contains any files with names longer than 14
2515 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2516 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2518 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2522 * The configuration process has changed quite a bit. The `configure'
2523 script is now used just like the configuration scripts for other GNU
2524 packages. The `sysdeps' directory hierarchy is much rearranged.
2525 The file `INSTALL' explains the new scheme in detail.
2527 * The header files no longer need to be processed into ANSI C and
2528 traditional C versions. There is just one set of files to install, and
2529 it will work with ANSI or old C compilers (including `gcc -traditional').
2531 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2532 MIPS DECStation running Ultrix 4.
2534 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2535 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2536 made itself into a shared library.
2538 * Yet further improved support for the i386, running 4.3 BSD-like systems
2539 (such as Mach 3 with the Unix single-server), or System V.
2541 * New function `strncasecmp' to do case-insensitive string comparison
2542 with limited length.
2544 * New function `strsep' is a reentrant alternative to `strtok'.
2546 * New functions `scandir' and `alphasort' for searching directories.
2548 * New function `setenv' is a better interface to `putenv'.
2550 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2551 function for traversing a directory tree.
2553 * The GNU obstack package is now also part of the C library.
2554 The new function `open_obstack_stream' creates a stdio stream that
2555 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2556 formatted output directly to an obstack.
2558 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2559 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2561 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2563 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2564 things to your strings.
2566 * There are some new test programs: test-fseek, testmb, and testrand.
2568 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2569 These ports are not finished, but are a good starting place for really
2570 supporting those systems.
2572 * `/etc/localtime' is now the standard location for the file that says what
2573 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2574 This follows the general principle that `/etc' is the place for all local
2575 configuration files.
2577 * The C library header files now use `extern "C"' when used by the C++
2578 compiler, so the C library should now work with C++ code.
2580 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2581 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2584 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2585 function which uses the `merge sort' algorithm, and is said to be
2586 significantly faster than the old GNU `qsort' function. Merge sort is
2587 now the standard `qsort' function. The new algorithm can require a lot
2588 of temporary storage; so, the old sorting function is called when the
2589 required storage is not available.
2591 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2592 provides the Unix `crypt' function, plus some other entry points.
2594 * The code and header files taken from 4.4 BSD have been updated with the
2595 latest files released from Berkeley.
2597 ----------------------------------------------------------------------
2598 Copyright information:
2600 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2602 Permission is granted to anyone to make or distribute verbatim copies
2603 of this document as received, in any medium, provided that the
2604 copyright notice and this permission notice are preserved,
2605 thus giving the recipient permission to redistribute in turn.
2607 Permission is granted to distribute modified versions
2608 of this document, or of portions of it,
2609 under the above conditions, provided also that they
2610 carry prominent notices stating who last changed them.
2613 version-control: never