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 and stpcpy implementations for powerpc64/powerpc64le.
24 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
25 and powerpc64le. This may improve lock scaling of existing programs on
26 HTM capable systems. The lock elision code is only enabled with
27 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
28 powerpc will issue a transaction abort on every syscall to avoid side
29 effects being visible outside transactions.
31 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
32 AArch64. Contributed by ARM Ltd.
34 * i386 memcpy functions optimized with SSE2 unaligned load/store.
36 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
37 under certain input conditions resulting in the execution of a shell for
38 command substitution when the applicaiton did not request it. The
39 implementation now checks WRDE_NOCMD immediately before executing the
40 shell and returns the error WRDE_CMDSUB as expected.
42 * CVE-2012-3406 printf-style functions could run into a stack overflow when
43 processing format strings with a large number of format specifiers.
45 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
46 infinite loop if the DNS response contained a PTR record of an unexpected
49 * The minimum GCC version that can be used to build this version of the GNU
50 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
51 still be used to compile programs using the GNU C Library.
53 * The GNU C Library is now built with -Werror by default. This can be
54 disabled by configuring with --disable-werror.
56 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
58 * The obsolete sigvec function has been removed. This was the original
59 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
60 programs have been using instead for about 25 years. Of course, ABI
61 compatibility for old binaries using sigvec remains intact.
63 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
64 with newer versions of bison.
66 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
67 The original MIPS o32 hard-float ABI requires an FPU where double-precision
68 registers overlay two consecutive single-precision registers. MIPS32R2
69 introduced a new FPU mode (FR=1) where double-precision registers extend the
70 corresponding single-precision registers which is incompatible with the
71 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
72 require the use of FR=1 making a transition necessary. New o32 ABI
73 extensions enable users to migrate over time from the original o32 ABI
74 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
75 tracks the ABI of any loaded object and verifies that new objects are
76 compatible. Mode transitions will also be requested as required and
77 unsupportable objects will be rejected. The ABI checks include both soft and
78 hard float ABIs for o32, n32 and n64.
80 GCC 5 with GNU binutils 2.25 onwards:
81 It is strongly recommended that all o32 system libraries are built using the
82 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
83 with the original and all new o32 ABI extensions. Configure a MIPS GCC
84 compiler using --with-fp-32=xx to set this by default.
88 * The following bugs are resolved with this release:
90 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
91 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
92 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
93 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
94 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
95 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
96 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
97 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
98 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
99 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
100 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
101 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
102 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
103 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
104 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
106 * Reverted change of ABI data structures for s390 and s390x:
107 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
108 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
109 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
110 are preserved pointing straight to the same implementation as the old ones.
111 Given that, new callers will simply provide a too-big buffer to these
112 functions. Any applications/libraries out there that embed jmp_buf or
113 ucontext_t in an ABI-relevant data structure that have already been rebuilt
114 against 2.19 headers will have to rebuilt again. This is necessary in any
115 case to revert the breakage in their ABI caused by the glibc change.
117 * Support for file description locks is added to systems running the
118 Linux kernel. The standard file locking interfaces are extended to
119 operate on file descriptions, not file descriptors, via the use of
120 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
121 are associated with an open file instead of a process.
123 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
125 * The minimum Linux kernel version that this version of the GNU C Library
126 can be used with is 2.6.32.
128 * Running the testsuite no longer terminates as soon as a test fails.
129 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
130 with PASS or FAIL lines for individual tests. A summary of the results is
131 printed, including a list of failing lists, and "make check" exits with
132 error status if there were any unexpected failures. "make check
133 stop-on-test-failure=y" may be used to keep the old behavior.
135 * The am33 port, which had not worked for several years, has been removed
138 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
139 supported; they now act the same as _DEFAULT_SOURCE (but generate a
140 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
141 conflicted with POSIX (support for which was removed in 2.19), the
142 interfaces those macros enabled remain available when compiling with
143 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
146 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
148 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
149 This may improve lock scaling of existing programs on TX capable systems.
150 The lock elision code is only built with --enable-lock-elision=yes and
151 then requires a GCC version supporting the TX builtins. With lock elision
152 default mutexes are elided via __builtin_tbegin, if the cpu supports
153 transactions. By default lock elision is not enabled and the elision code
156 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
157 copy the path argument. This allowed programs to cause posix_spawn to
158 deference a dangling pointer, or use an unexpected pathname argument if
159 the string was modified after the posix_spawn_file_actions_addopen
162 * All supported architectures now use the main glibc sysdeps directory
163 instead of some being in a separate "ports" directory (which was
164 distributed separately before glibc 2.17).
166 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
167 On configurations that support it (all Linux configurations), it's now
168 used regardless of the --enable-add-ons switch to configure. It is no
169 longer possible to build such configurations without pthreads support.
171 * Locale names, including those obtained from environment variables (LANG
172 and the LC_* variables), are more tightly checked for proper syntax.
173 setlocale will now fail (with EINVAL) for locale names that are overly
174 long, contain slashes without starting with a slash, or contain ".." path
175 components. (CVE-2014-0475) Previously, some valid locale names were
176 silently replaced with the "C" locale when running in AT_SECURE mode
177 (e.g., in a SUID program). This is no longer necessary because of the
180 * On x86-64, the dynamic linker's lazy-binding support is now compatible
181 with application code using Intel MPX instructions. (With all previous
182 versions, the MPX register state could be clobbered when making calls
183 into or out of a shared library.) Note that while the new dynamic
184 linker is compatible with all known x86 hardware whether or not it
185 supports Intel MPX, some x86 instruction-set emulators might fail to
186 handle the new instruction encodings. This is known to affect Valgrind
187 versions up through 3.9 (but will be fixed in the forthcoming 3.10
188 release), and might affect other tools that do instruction emulation.
190 * Support for loadable gconv transliteration modules has been removed.
191 The support for transliteration modules has been non-functional for
192 over a decade, and the removal is prompted by security defects. The
193 normal gconv conversion modules are still supported. Transliteration
194 with //TRANSLIT is still possible, and the //IGNORE specifier
195 continues to be supported. (CVE-2014-5119)
197 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
198 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
199 resulting a denial-of-service security vulnerability in applications which
200 use functions related to iconv. (CVE-2014-6040)
204 * The following bugs are resolved with this release:
206 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
207 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
208 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
209 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
210 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
211 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
212 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
213 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
214 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
215 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
216 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
217 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
218 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
219 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
220 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
221 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
222 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
223 16431, 16453, 16474, 16506, 16510, 16529
225 * Slovenian translations for glibc messages have been contributed by the
226 Translation Project's Slovenian team of translators.
228 * The public headers no longer use __unused nor __block. This change is to
229 support compiling programs that are derived from BSD sources and use
230 __unused internally, and to support compiling with Clang's -fblock
231 extension which uses __block.
233 * CVE-2012-4412 The strcoll implementation caches indices and rules for
234 large collation sequences to optimize multiple passes. This cache
235 computation may overflow for large collation sequences and may cause a
236 stack or buffer overflow. This is now fixed to use a slower algorithm
237 which does not use a cache if there is an integer overflow.
239 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
240 rules for large collation sequences to optimize multiple passes and falls
241 back to alloca if malloc fails, resulting in a possible stack overflow.
242 The implementation now falls back to an uncached collation sequence lookup
245 * CVE-2013-4788 The pointer guard used for pointer mangling was not
246 initialized for static applications resulting in the security feature
247 being disabled. The pointer guard is now correctly initialized to a
248 random value for static applications. Existing static applications need
249 to be recompiled to take advantage of the fix (bug 15754).
251 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
252 to the d_name member of struct dirent, or omit the terminating NUL
253 character. (Bugzilla #14699).
255 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
256 aligned_alloc functions could allocate too few bytes or corrupt the
257 heap when passed very large allocation size values (Bugzilla #15855,
260 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
261 for AF_INET6 has been fixed (Bugzilla #16072).
263 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
264 pap_CW, quz_PE, the_NP.
266 * Substantially revised locales: gd_GB, ht_HT
268 * The LC_ADDRESS field was updated to support country_car for almost all
271 * ISO 1427 definitions were updated.
273 * ISO 3166 definitions were updated.
275 * The localedef utility now supports --big-endian and --little-endian
276 command-line options to generate locales for a different system from that
277 for which the C library was built.
279 * Binary locale files now only depend on the endianness of the system for
280 which they are generated and not on other properties of that system. As a
281 consequence, binary files generated with new localedef may be incompatible
282 with old versions of the GNU C Library, and binary files generated with
283 old localedef may be incompatible with this version of the GNU C Library,
284 in the following circumstances:
286 + Locale files may be incompatible on m68k systems.
288 + Locale archive files (but not separate files for individual locales) may
289 be incompatible on systems where plain "char" is signed.
291 * The configure option --disable-versioning has been removed. Builds with
292 --disable-versioning had not worked for several years.
294 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
295 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
297 * SystemTap probes for malloc have been introduced.
299 * SystemTap probes for slow multiple precision fallback paths of
300 transcendental functions have been introduced.
302 * Support for powerpc64le has been added.
304 * The soft-float powerpc port now supports e500 processors.
306 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
308 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
309 set of header declarations that are enabled by default, even when other
310 feature test macros or compiler options such as -std=c99 would otherwise
311 disable some of those declarations.
313 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
314 conflict with POSIX. The libbsd-compat library (which was a dummy library
315 that did nothing) has also been removed.
317 * Preliminary documentation about Multi-Thread, Async-Signal and
318 Async-Cancel Safety has been added.
320 * Change of ABI data structures for s390 and s390x:
321 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
322 allow for future hardware extensions. All library functions that accept or
323 return these structures were versioned in order to provide backwards
324 compatibility with existing code. However, not all cases can be handled
325 with interface versioning. If an application embeds either structure into
326 another structure and that structure is passed to another compilation unit
327 which expects the newer larger-sized object then any access to the new
328 fields will result in undefined behaviour. Similarly any access to fields
329 that were moved by the enlarging of the structures will cause undefined
330 behaviour. To fix the undefined behaviour all objects that are part of the
331 final in-memory image must agree on the size of structures, and this may
332 require recompilation.
336 * The following bugs are resolved with this release:
338 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
339 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
340 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
341 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
342 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
343 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
344 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
345 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
346 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
347 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
348 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
349 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
350 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
353 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
354 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
355 Distributions can re-enable building and using pt_chown via the new configure
356 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
357 considerable security risks and should only be used if the distribution
358 understands and accepts the risks.
360 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
363 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
364 fixed (Bugzilla #15330).
366 * Add support for calling C++11 thread_local object destructors on thread
367 and program exit. This needs compiler support for offloading C++11
368 destructor calls to glibc.
370 * Improved worst case performance of libm functions with double inputs and
373 * Support for priority inherited mutexes in pthread condition variables on
374 non-x86 architectures.
376 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
378 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
380 * Optimized string functions for ARM. Implemented by Will Newton and
383 * Optimized libm functions for SPARC. Implemented by David S. Miller.
385 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
388 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
389 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
391 * Added a benchmark framework to track performance of functions in glibc.
393 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
394 It is based on draft TS 18661 and currently enabled as a GNU extension.
396 * On Linux, the clock function now uses the clock_gettime system call
397 for improved precision, rather than old times system call.
399 * Added support for version-3 tz format files. This is needed when using
400 the tz database release 2013e or later, and affects a few unusual cases --
401 currently only TZ='America/Godthab' for time stamps after 2037.
403 * Added new API functions pthread_getattr_default_np and
404 pthread_setattr_default_np to get and set the default pthread
405 attributes of a process.
407 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
408 This may improve lock scaling of existing programs on TSX capable systems.
409 When the --enable-lock-elision=yes parameter is specified at configure
410 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
413 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
414 availability). Implemented by Ryan S. Arnold.
416 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
420 * The following bugs are resolved with this release:
422 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
423 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
424 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
425 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
426 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
427 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
428 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
429 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
430 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
431 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
432 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
433 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
434 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
435 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
436 14879, 14889, 14893, 14898, 14914.
438 * Optimization of memcpy for MIPS.
440 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
441 EMFILE has been fixed (Bugzilla #14889).
443 * The add-on ports collection is now distributed in the "ports" subdirectory
444 of the main GNU C Library distribution, rather than separately.
446 * Port to ARM AArch64 contributed by Linaro.
448 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
449 Optimized versions of memcpy, memset, and memcmp added for System z10 and
451 Implemented by Andreas Krebbel.
453 * The new function secure_getenv allows secure access to the environment,
454 returning NULL if running in a SUID/SGID process. This function replaces
455 the internal function __secure_getenv.
457 * SystemTap static probes have been added into the dynamic linker.
458 Implemented by Gary Benson.
460 * Optimizations of string functions strstr, strcasestr and memmem.
461 Implemented by Maxim Kuvyrkov.
463 * The minimum Linux kernel version that this version of the GNU C Library
464 can be used with is 2.6.16.
466 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
467 powerpc POWER7. Implemented by Will Schmidt.
469 * New configure option --disable-nscd builds the C library such that it
470 never attempts to contact the Name Service Caching Daemon (nscd).
471 New configure option --disable-build-nscd avoids building nscd itself;
472 this is the default if --disable-nscd is used.
474 * Improved support for cross-compilation, including cross-testing and
475 bootstrap builds without a previously built glibc.
477 * Several testsuite tests are now able to test multiple IFUNC variants of an
478 interface, rather than just testing the one that would be chooen by
481 * New configure options --with-bugurl and --with-pkgversion, for
482 distributors to use to embed their bug-reporting and package version
483 information in --help and --version output.
485 * The ttyname and ttyname_r functions on Linux now fall back to searching for
486 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
487 allows creation of chroots without the procfs mounted on /proc.
489 * The `crypt' function now fails if passed salt bytes that violate the
490 specification for those values. On Linux, the `crypt' function will
491 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
492 enabled, and fail on encrypted strings using the MD5 or DES algorithm
493 when the mode is enabled.
495 * The `clock_*' suite of functions (declared in <time.h>) is now available
496 directly in the main C library. Previously it was necessary to link with
497 -lrt to use these functions. This change has the effect that a
498 single-threaded program that uses a function such as `clock_gettime' (and
499 is not linked with -lrt) will no longer implicitly load the pthreads
500 library at runtime and so will not suffer the overheads associated with
501 multi-thread support in other code such as the C++ runtime library.
503 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
508 * The following bugs are resolved with this release:
510 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
511 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
512 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
513 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
514 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
515 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
516 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
517 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
518 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
519 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
520 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
521 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
522 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
523 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
524 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
525 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
526 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
527 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
528 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
529 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
530 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
531 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
534 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
535 configuring glibc with:
536 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
537 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
538 Implemented by H.J. Lu.
542 + define static_assert
544 + do not declare gets
546 + declare at_quick_exit and quick_exit also for ISO C11
548 + aligned_alloc. NB: The code is deliberately allows the size parameter
549 to not be a multiple of the alignment. This is a moronic requirement
550 in the standard but it is only a requirement on the caller, not the
555 + uchar.h support added
557 + CMPLX, CMPLXF, CMPLXL added
559 Implemented by Ulrich Drepper.
561 * Support for the IA-64 has been moved to ports.
563 * Remove support for anything but ELF binary format
565 * Checking versions of poll, ppoll added.
566 Implemented by Ulrich Drepper.
568 * More generic and 64-bit performance optimizations to math functions.
569 Implemented by Ulrich Drepper.
571 * New configure option --enable-obsolete-rpc makes the deprecated RPC
572 headers and functions available at compile time as they were before
573 version 2.14. This option will be removed at some time in the future
574 after the TI-RPC library becomes fully sufficient for the needs of
575 existing applications.
577 * Compatibility code for Linux kernel versions before 2.4 has been removed.
578 Note that glibc is not expected to work with any Linux kernel version
581 * New header <sys/auxv.h> and function getauxval allowing easy access to
582 the AT_* key-value pairs passed from the Linux kernel. The header also
583 defines the HWCAP_* bits associated with the AT_HWCAP key.
585 * New locales: mag_IN
587 * New configure option --enable-systemtap builds SystemTap static probes
588 into libc for setjmp and longjmp and into libpthread for various operations.
589 So far the setjmp/longjmp probes and some of the libpthread probes are
590 provided only for i*86 and x86_64.
591 Implemented by Roland McGrath and Rayson Ho.
593 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
595 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
598 * More optimized functions for SPARC. Implemented by David S. Miller.
600 * Improved support for cross-compilation, especially bootstrap builds
601 without a previously built glibc.
603 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
604 Chris Metcalf from Tilera.
606 * Support for the old ARM ABI has been removed from ports. Only the EABI is
607 now supported for ARM processors.
609 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
610 as the name of the dynamic linker, to distinguish it from the
611 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
613 * Support for CRIS has been removed from ports.
615 * A new class of installed header has been documented for low-level
616 platform-specific functionality. PowerPC added the first instance with a
617 function to provide time base register access. Contributed by Tulio
618 Magno Quites Machado Filho.
620 * ix86 configurations now install header files that are consistent with
621 what x86-64 configurations install. These same header files can be used
622 for -m32, -m64, or -mx32 builds.
623 Contributed by H.J. Lu.
625 * Math library bug fixes. A thorough audit of all open math library bugs was
626 conducted by Joseph Myers. Significant progress was made on many math
627 library bugs resulting in more accurate exceptions and function results.
628 Many thanks to all those that contributed including Andreas Jaeger for his
629 patch review and work on the x87 trigonometric instruction issues.
631 * Timezone data is no longer installed. Timezone-related binaries and scripts
632 will continue to be installed. Users should obtain their timezone data from
633 their distribution provider or from the tzdata package at
634 <ftp://munnari.oz.au/pub/>.
638 * The following bugs are resolved with this release:
640 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
641 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
642 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
643 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
644 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
645 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
646 13484, 13506, 13515, 13523, 13524, 13538, 13540
648 * New program pldd to list loaded object of a process
649 Implemented by Ulrich Drepper.
651 * Add nss_db support back to glibc. No more dependency on Berkeley db
652 and support for initgroups lookups.
653 Implemented by Ulrich Drepper.
655 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
656 Contributed by HJ Lu.
658 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
659 Contributed by HJ Lu.
661 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
662 on x86-32 and x86-64.
663 Contributed by Liubov Dmitrieva.
665 * Optimized strchr and strrchr for SSE on x86-32.
666 Contributed by Liubov Dmitrieva.
668 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
669 for x86-64 and x86-32.
670 Contributed by Liubov Dmitrieva.
672 * New interfaces: scandirat, scandirat64
673 Implemented by Ulrich Drepper.
675 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
676 Implemented by Ulrich Drepper.
678 * nscd now also caches the netgroup database.
679 Implemented by Ulrich Drepper.
681 * Integrate libm with gcc's -ffinite-math-only option.
682 Implemented by Ulrich Drepper.
684 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
685 to math functions. Implemented by Ulrich Drepper.
687 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
688 Implemented by Ulrich Drepper.
690 * New Linux interfaces: process_vm_readv, process_vm_writev
692 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
693 Implemented by Ulrich Drepper.
695 * Optimized nearbyint and strcasecmp for PPC.
696 Implemented by Adhemerval Zanella.
698 * New locales: bho_IN, unm_US, es_CU, ta_LK
702 * The following bugs are resolved with this release:
704 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
705 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
706 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
707 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
708 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
709 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
710 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
711 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
712 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
713 12795, 12811, 12813, 12814, 12841
715 * The RPC implementation in libc is obsoleted. Old programs keep working
716 but new programs cannot be linked with the routines in libc anymore.
717 Programs in need of RPC functionality must be linked against TI-RPC.
718 The TI-RPC implementation is IPv6 enabled and there are other benefits.
720 Visible changes of this change include (obviously) the inability to link
721 programs using RPC functions without referencing the TI-RPC library and the
722 removal of the RPC headers from the glibc headers.
723 Implemented by Ulrich Drepper.
725 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
726 syncfs, setns, sendmmsg
728 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
729 yue_HK, lij_IT, mhr_RU
731 * New encodings: CP770, CP771, CP772, CP773, CP774
733 * New program sotruss to trace calls through PLTs
734 Implemented by Ulrich Drepper.
736 * The malloc hook implementation is marked deprecated and will be removed
737 from the default implementation in the next version. The design never
738 worked ever since the introduction of threads. Even programs which do
739 not create threads themselves can use multiple threads created internally.
743 * The following bugs are resolved with this release:
745 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
746 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
747 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
748 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
751 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
753 * POWER7 optimizations: memset, memcmp, strncmp
755 * New optimized string functions for x86-64: strnlen (SSE2),
756 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
757 Implemented by Ulrich Drepper.
761 * The following bugs are resolved with this release:
763 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
764 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
765 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
766 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
767 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
768 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
769 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
770 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
772 * New interfaces: pthread_getname_np, pthread_setname_np
774 * New Linux interface: recvmmsg
776 * STT_GNU_IFUNC implemented for Sparc by David Miller.
778 * The dynamic linker now recognizes supported ABI versions from the
779 EI_ABIVERSION field in the ELF header.
780 Implemented by Ulrich Drepper.
782 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
783 will not be used to fill in password fields in the passwd.byname replies.
784 Instead it is used to synthesize the shadow.byname table, should it be
785 missing. This is a useful mode in some installations involving Solaris.
786 Implemented by Ulrich Drepper.
788 * New locales: kok_IN, sq_MK, cv_RU
792 * The following bugs are resolved with this release:
794 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
795 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
796 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
797 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
798 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
799 10789, 10817, 10823, 10840, 10847
801 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
803 Implemented by Ulrich Drepper.
805 * Checking version of longjmp added that fails if an uninitialized stack
806 frame would be created. Implemented by Ulrich Drepper.
808 * STT_GNU_IFUNC is now supported in static executables.
809 Implemented by H.J. Lu.
811 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
813 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
814 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
815 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
816 Contributed by H.J. Lu.
818 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
819 Implemented by Ulrich Drepper.
821 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
823 Contributed by H.J. Lu.
825 * Support for fma instruction in AVX on x86-64.
826 Implemented by H.J. Lu and Ulrich Drepper.
828 * AVX support in x86-64 auditing support in ld.so.
829 Implemented by H.J. Lu.
831 * STB_GNU_UNIQUE support added.
832 Implemented by Ulrich Drepper.
834 * Implement second fallback mode for optimized DNS lookup for even more
835 broken environments. If two requests from the same port are not
836 handled correctly close the socket and open a new one before sending
837 the second request. The 'single-request-reopen' option in /etc/resolv.conf
838 can be used to select this mode right away, instead of rediscovering the
839 necessity is every process again.
840 Implemented by Ulrich Drepper.
842 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
843 Implemented by Adam Tkac.
845 * Optimized iconv conversions for S390x.
846 Implemented by Andreas Krebbel.
848 * Using condvars with PI mutexes is now more efficient due to kernel
849 support for requeueing to PI futexes. NPTL support added for x86-64.
850 Implemented by Ulrich Drepper.
852 * New locales: ps_AF, my_MM
856 * The following bugs are resolved with this release:
858 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
859 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
860 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
861 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
862 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
864 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
865 Implemented by Ulrich Drepper.
867 * New Linux interfaces: accept4, fallocate, fallocate64.
868 Implemented by Ulrich Drepper.
870 * Correct declarations of string function when used in C++ code. This
871 could lead to compile errors for invalid C++ code.
873 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
876 * New POSIX 2008 interface: psiginfo
877 Implemented by Ulrich Drepper.
879 * New ISO C++1x interfaces: quick_exit, at_quick_exit
880 Implemented by Ulrich Drepper.
882 * Support for selecting between multiple function definitions at runtime
883 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
885 * The libcrypt library can now use the hash function implementations in
886 NSS. Implemented by Ulrich Drepper.
888 * The malloc implementation can be compiled to be less memory efficient
889 but higher performing in multi-threaded programs.
890 Implemented by Ulrich Drepper.
892 * New locales: nan_TW@latin, ks_IN
894 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
895 Implemented by Ulrich Drepper.
897 * Extended printf hook support. It is possible to use user-defined types
898 and extend existing format specifiers.
899 Implemented by Ulrich Drepper.
901 * Handling for group shadow files has been added.
902 Implemented by Ulrich Drepper.
904 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
905 servers (the case, e.g., for some people using the built-in DNS
906 server in ADSL modems/routers). There is a once-per-process timeout
907 in case of a broken server. To avoid it, users can run nscd or put
908 'options single-request' in /etc/resolv.conf.
909 Implemented by Ulrich Drepper.
913 * The following bugs are resolved with this release:
915 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
916 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
917 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
918 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
919 6968, 6974, 6980, 6995, 7008, 7009, 7029
921 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
922 up at the same time. Implemented by Ulrich Drepper.
924 * TLS descriptors for LD and GD on x86 and x86-64.
925 Implemented by Alexandre Oliva.
927 * getaddrinfo now handles DCCP and UDPlite.
928 Implemented by Ulrich Drepper.
930 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
931 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
932 Implemented by Ulrich Drepper.
934 * New implementation of memmem, strstr, and strcasestr which is O(n).
935 Implemented by Eric Blake.
937 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
939 * Implement "e" option for popen to open file descriptor with the
940 close-on-exec flag set. Implemented by Ulrich Drepper.
942 * Implement "b" mode for fmemopen. In this mode writes writes don't
943 implicitly add a NUL byte and seeks from the end of the buffer really
944 use the buffer end, not the string length as the basis.
945 Implemented by Ulrich Drepper.
947 * Many functions, exported and internal, now atomically set the close-on-exec
948 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
950 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
952 Implemented by Pravin Satpute.
954 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
958 * The following bugs are resolved with this release:
960 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
961 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
962 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
963 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
964 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
965 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
966 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
968 * New locales: bo_CN, bo_IN, shs_CA.
970 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
972 * Sorting rules for some Indian languages (Devanagari and Gujarati).
973 Implemented by Pravin Satpute.
975 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
977 * nscd caches now all timeouts for DNS entries
978 Implemented by Ulrich Drepper.
980 * nscd is more efficient and wakes up less often.
981 Implemented by Ulrich Drepper.
983 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
984 vdprintf, and obstack_vprintf.
985 Implemented by Jakub Jelinek.
987 * Faster memset for x86-64.
988 Implemented by Harsha Jagasia and H.J. Lu.
990 * Faster memcpy on x86.
991 Implemented by Ulrich Drepper.
993 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
994 Implemented by Ulrich Drepper.
996 * Faster sqrt and sqrtf implemention for some PPC variants.
997 Implemented by Steven Munroe.
1001 * The following bugs are resolved with this release:
1003 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1004 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1005 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1006 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1007 5071, 5103, 5104, 5112, 5113, 5184, 5186
1009 * More checking functions: fread, fread_unlocked, open*, mq_open.
1010 Implemented by Jakub Jelinek and Ulrich Drepper.
1012 * Extend fortification to C++. Implemented by Jakub Jelinek.
1014 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1015 by not recognizing 'a' as a modifier when those specs are requested.
1016 Implemented by Jakub Jelinek.
1018 * PPC optimizations to math and string functions.
1019 Implemented by Steven Munroe.
1021 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1022 options to be passed. Implemented by Ulrich Drepper.
1024 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1026 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1027 Implemented by Ulrich Drepper.
1029 * Handle private futexes in the NPTL implementation.
1030 Implemented by Jakub Jelinek and Ulrich Drepper.
1032 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1033 Implemented by Roland McGrath and Ulrich Drepper.
1035 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1037 * SHA-256 and SHA-512 based password encryption.
1038 Implemented by Ulrich Drepper.
1040 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1041 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1044 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1045 Implemented by Ulrich Drepper.
1049 * The following bugs are resolved with this release:
1051 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1052 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1053 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1054 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1055 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1056 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1057 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1060 * New Linux interfaces: epoll_pwait, sched_getcpu.
1062 * New generic interfaces: strerror_l.
1064 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1068 * The following bugs are resolved with this release:
1070 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1071 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1072 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1073 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1074 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1075 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1076 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1077 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1078 3225, 3251, 3252, 3253, 3273
1080 * For Linux, the sorting of addresses returned by getaddrinfo now also
1081 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1082 Implemented by Ulrich Drepper.
1084 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1085 Implemented by Ulrich Drepper.
1087 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1089 * New iconv module for MIK. Contributed by Alexander Shopov.
1091 * For sites with broken group and/or passwd database, the auto-propagate
1092 option of nscd can prevent creating ID lookup entries from the results
1093 of a name lookup and vice versa. This usually is no problem but some
1094 site might have problems with the default behavior.
1095 Implemented by Ulrich Drepper.
1097 * Iterating over entire database in NIS can be slow. With the
1098 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1099 to trade time for memory. The entire database will be read at once.
1100 Implemented by Ulrich Drepper.
1102 * The interfaces introduced in RFC 3542 have been implemented by
1105 * Support for the new ELF hash table format was added by Ulrich Drepper.
1107 * Support for priority inheritance mutexes added by Jakub Jelinek and
1110 * Support for priority protected mutexes added by Jakub Jelinek.
1112 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1113 or_IN, csb_PL, fy_NL, sr_ME.
1117 * More overflow detection functions.
1119 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1120 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1122 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1123 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1124 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1125 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1126 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1127 by Masahide Washizawa.
1129 * It is now possible to install audit libraries for the dynamic linker using
1130 LD_AUDIT. Implemented by Ulrich Drepper.
1132 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1133 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1134 For a libc and libpthread that works well on Linux 2.4 kernels, we
1135 recommend using the stable 2.3 branch.
1137 * The new function open_wmemstream acts like open_memstream,
1138 but uses a wchar_t wide character buffer.
1140 * The new function ppoll is an improved version of poll, similar to pselect.
1142 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1143 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1144 renameat, unlinkat, linkat, symlinkat, readlinkat.
1146 * New Linux kernel system calls: unshare,
1147 inotify_init, inotify_add_watch, inotify_rm_watch.
1149 * The euidaccess function is now also known by the alias eaccess,
1150 for compatibility with some other systems.
1152 * Timezone data updated to 2006b version.
1156 * The following bugs are resolved with this release:
1158 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1159 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1160 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1161 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1162 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1163 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1165 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1167 * As of this release, GCC 4 can be used to compile the C Library.
1169 * Timezone data updated to 2005m version.
1173 * The following bugs are resolved with this release:
1175 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1176 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1177 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1178 777, 787, 821, 822, 823, 825
1180 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1184 * Support for RFC 3678. Real implementations exist only for Linux so far.
1185 Implemented by Ulrich Drepper.
1187 * nscd can now cache entries persistently. Expiring entries are reloaded.
1188 For speedups the cache can be shared in memory with client processes.
1189 Implemented by Ulrich Drepper.
1191 * nscd can now perform SELinux checks.
1192 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1194 * getaddrinfo queries are now cached. Canonical name lookup is performed
1196 Implemented by Ulrich Drepper.
1198 * The nothrow function attribute is used when headers are used by gcc when
1199 compiling C code. This can avoid significant amounts of exception
1202 * The malloc functions perform more error checking and are stricter when
1203 it comes to reacting on errors. The default action is to terminate
1204 the process after showing an error message. Implemented by Ulrich Drepper.
1206 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1207 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1209 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1210 namespaces using the new function dlmopen(). This feature is of course,
1211 like most other dynamic loading functionality, not available in statically
1212 linked applications. Implemented by Ulrich Drepper.
1214 * Low-overhead boundary checking variants of string and some stdio functions
1215 were added. These are to be used in conjunction with a gcc patch by
1216 Jakub Jelinek which adds calls to these functions if possible.
1217 Implemented by Jakub Jelinek and Ulrich Drepper.
1219 * Old code for several operating systems and machine architectures that
1220 have not been in working condition in a long time have been removed from
1221 the main source tree maintained by the GNU C Library's maintainers.
1222 These files are now reside in the separate `ports' source module
1223 that is usable as an add-on when building the library.
1227 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1228 interrogate the dynamic linker, compatible with the Solaris interface.
1230 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1231 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1233 * getifaddrs now uses the netlink interface on Linux to get its information.
1234 Implemented by Thorsten Kukuk.
1236 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1237 Implemented by Ulrich Drepper.
1239 * support for non-executable stacks on x86 has been added. Changes mostly
1242 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1245 * getaddrinfo now performs destination address selection according to
1250 * Thread-safe interfaces for many functions that access locale data
1251 were added in version 2.3, but these features were omitted from NEWS.
1252 Many functions have variants with an `_l' suffix that take a `locale_t'
1253 object as a parameter rather than consulting the current locale.
1254 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1255 create and maintain `locale_t' objects. Additionally, the new function
1256 `uselocale' sets "the current locale" (as used by functions not so
1257 parameterized) set for an individual thread. These features were added
1258 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1260 * The functions getresuid, getresgid, setresuid, and setresgid, which
1261 have long been available on Linux, are now declared in <unistd.h>
1262 and are now also available on the Hurd.
1264 * ELF thread-local storage support (TLS) now works on x86-64.
1266 * The new dynamic string token $LIB is expanded in shared library names.
1267 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1269 * Aldy Hernandez contributed complete software floating point support for
1270 PowerPC machines with no FPU.
1272 * fexecve is implemented on Linux.
1274 * The `btowc' function should work at least twice as fast due to
1275 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1277 * With approriate thread add-ons cancelable functions are now implemented
1278 in libc.so as well. No need to call the function in libpthread. This
1279 change allowed to finally disable the incorrect and expensive handling
1280 of weak definition in ld.so.
1282 * Yet more PLT entries in libc.so have been removed. We finally arrived
1283 at the bare minimum. Startup times improved appropriately.
1285 * Support for the new Linux/x86 system call interface was added. The
1286 AT_SYSINFO auxiliary vector entry is recognized and handled.
1290 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1293 * iconv (the program and the interface) now accepts empty names (excluding
1294 options like //TRANSLIT) to mean "use charset of current locale".
1296 * localedef can now transliterate characters in strings which are not in
1297 the provided charmap. The information from the input locale is used.
1299 * Prelinking support was added for ELF targets. This requires additional
1300 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1302 * Read-only stdio streams now use mmap to speed up operation by eliminating
1303 copying and buffer underflows. To use add 'm' to the mode string of
1304 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1306 * The malloc functions were completely rewritten by Wolfram Gloger based
1307 on Doug Lea's malloc-2.7.0.c.
1309 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1310 implementation of regex.
1312 * Bruno Haible upgraded the iconv and locale implementation to support
1315 * Contents of the LC_* and LANG environment variables in the CEN style are
1316 not recognized anymore. It never was used. Change by Ulrich Drepper.
1318 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1319 thread-local storage (TLS) ABI on some platforms.
1320 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1322 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1323 EUC-JISX0213, and TSCII.
1325 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1326 BSD-compatible interface for getting all network interface addresses.
1327 Implementation for IPv4 by Roland McGrath.
1329 * Loading of locale data is faster due to the introduction of a locale
1330 archive. Implemented by Roland McGrath and Ulrich Drepper.
1332 * Startup times are significantly reduced by not using exported functions
1333 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1336 * Steven Munroe contributed a port to PowerPC64/Linux.
1340 * The Hurd now uses the GNU libio implementation of stdio rather than the
1341 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1343 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1344 with the same behavior as the Linux system call of the same name.
1348 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1349 128-bit long double format.
1351 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1352 IBM1161, and IBM1162 charsets.
1354 * Andreas Jaeger contributed a port to x86-64/Linux.
1356 * Peter Bruin contributed a port to PowerPC/Hurd.
1358 * libc functions using I/O streams now can handle wide-oriented streams
1361 * optimizations in the dynamic linker. Binaries created by recent binutils
1362 versions start up quicker due to reduced time spent on relocations.
1364 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1368 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1369 asinh, atanh, j0 for the 128-bit long double format.
1371 * Bruno Haible updated all the code handling Unicode in some form to
1372 support Unicode 3.1.
1374 * Speed of regex for single-byte locales is back to previous levels.
1375 Patch by Isamu Hasegawa.
1377 * Alpha, SPARC, and IA-64 now also using floating stacks.
1379 * Startup time of internationalized applications greatly improved through
1380 iconv cache. Use iconvconfig to generate the cache file.
1381 Contributed by Ulrich Drepper.
1383 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1384 severe performance problems. Patch by David Mosberger.
1386 * The Hurd port got a lot more functionality like AIO, various stdio
1387 extensions, etc. Mainly done by Roland McGrath.
1389 * mtrace can now lookup symbols in shared libraries.
1393 * Intel's IA-64 math library is largely integrated. It provides fast and
1394 accurate implementatations for most basic and standard math functions
1395 in float, double, and long double format.
1397 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1398 and asin for the 96-bit long double format and asin, log, tan for the
1399 128-bit long double format.
1401 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1402 The basic double functions exist today. Contributed by Abraham Ziv
1403 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1404 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1406 * An asynchronous name lookup library was added. The interface is designed
1407 after POSIX AIO. The proposal was circulated beforehand to get comments.
1408 No negative ones came in. Implemented by Ulrich Drepper.
1410 * Port to S390/64bit contributed by Martin Schwidefsky
1411 <schwidefsky@de.ibm.com>.
1413 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1414 of functions for Linux/IA-64.
1416 * The RPC code is now thread safe. Threads can now use the same service
1417 of different services at the same time. Patch by Eric Norum
1418 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1420 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1421 family of functions for Linux/S390.
1423 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1424 of functions for Linux/x86.
1426 * Port to Linux/CRIS contributed by Axis Communications.
1430 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1431 we can now check for namespace violations and missing declarations. The
1432 result is that almost all headers are now Unix-compliant (as defined in
1433 the upcoming XPG6). The negative side is that some programs might need
1434 corrections, too, if they depend on the incorrect form of the headers in
1435 previous versions which defined too many symbols and included too many
1438 * regex now handles multibyte character sets correctly.
1439 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1441 * iconv (the program) does now conform to the upcoming XPG6 and handles
1442 charmaps. Instead of the charset names the path of charmaps can be
1443 provided and the conversion happens based on this data.
1444 Contributed by Ulrich Drepper.
1446 * The locale program now provides detailed information about the installed
1451 only lists the names of the supported locales
1455 provides details such as country, language, and codeset name.
1456 Contributed by Ulrich Drepper.
1460 * The gencat program now parses the input file according to the charset
1461 selected by the LC_CTYPE category. This is important for stateful
1462 character sets. To make generating catalogs easier there is a way
1463 to overwrite the charset selected by the locale: before the first
1464 message or $ quote line the catalog can contain a line like
1466 $ codeset=ISO-8859-2
1468 to select the charset (ISO-8859-2 in this case).
1470 Implemented by Shinya Hanataka and Ulrich Drepper.
1472 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1473 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1474 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1476 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1477 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1479 * The LANGUAGE environment variable is now ignored unless the locale is
1480 changed from the default "C" locale.
1482 * The usual bug fixes.
1486 * Greg McGary added runtime support for bounds checking using gcc's
1487 new -fbounded-pointers option. ix86 target is complete. PowerPC
1490 * Thorsten Kukuk added secure mode support to nscd.
1492 * The Berkeley db libraries have been removed.
1494 Related, the nss_db module is now in a separate package since it
1495 obviously requires a database library being available.
1497 * Wide character I/O streams implemented by Ulrich Drepper.
1499 * Functions from the extended socket API added by Ulrich Drepper.
1501 * Functions feenableexcept and fedisableexcept to control the
1502 behaviour of individual exceptions have been added by Andreas Jaeger.
1504 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1506 * The resolver code has been updated from bind 8.2.3-T5B which supports
1507 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1510 This change could in some situations effect backward compatibility. Since
1511 now `_res' is a thread-local instead of a global variable, modifying it
1512 in one thread does not have any effect in other threads.
1514 The resolver library was also extended to allow IPv6 as the transport
1515 protocol for the requests. This work was done by Stig Venaas.
1517 * Compatibility code for K&R C compilers has been removed from the
1518 header files. A ISO C compiler is needed to use the library
1519 (conforming to either C89 or C99 standard).
1521 * Complete rewrite of the localedef program to support multibyte character
1522 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1523 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1524 Implemented by Ulrich Drepper.
1526 Bruno Haible significantly improved the generation and use of the data
1527 structures for the wide character tables.
1529 * Plural handling in gettext implemented by Ulrich Drepper.
1531 * The utmp daemon has been removed.
1533 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1535 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1538 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1540 * POSIX barriers implemented by Kaz Kylheku.
1542 * POSIX spawn function family implemented by Ulrich Drepper.
1544 * POSIX spinlocks are now available.
1546 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1548 * the configure option --enable-kernel=X.Y.Z allows to strip out
1549 compatibility for kernel versions before X.Y.Z. This is currently only
1550 implemented for Linux.
1552 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1553 field sin6_scope_id. This means that all programs using IPv6 should be
1554 recompiled. Don't expect binary compatibility with previous glibc
1557 * various conversion modules for IBM character sets contributed by
1560 * IA-64 port by Jes Sorensen and HJ Lu.
1574 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1576 * New xdr functions are added; some rpc functions are now 64bit clean.
1578 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1580 * Fixed known incompatibilities with glibc 2.0.
1582 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1584 * Optimized a number of functions (especially the ELF dynamic loader).
1586 * Update timezone data files.
1588 * lots of charmaps corrections
1590 * some new locale definitions and charmaps
1595 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1596 conform to POSIX member type requirements. Symbol versions have been
1597 adjusted as needed within the library, and for direct use by applications,
1598 but there is potential for problems if third-party libraries use
1599 struct timeval as part of their interface. This does not present
1600 a problem for X and other "essential" system libraries.
1602 * An additional locale model to support C++ Standard Library locale
1603 model and probably more was implemented by Ulrich Drepper.
1605 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1608 * Miles Bader provided the `argp' function family to support hierachical
1609 command line argument parsing, layered on top of getopt.
1611 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1613 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1616 * scanf recognizes the %a and %A format for scanning floating point numbers.
1618 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1619 information and interfaces for the available integer types.
1621 * about 130 new math functions were added to implement the ISO C9x math
1624 * the new header <complex.h> contains definitions of the complex math
1625 functions from ISO C 9X.
1627 * the new header <tgmath.h> defines generic macros to use complex or
1628 real valued functions.
1630 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1632 * Andreas Jaeger provided a test suite for the math library.
1634 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1636 * Ulrich Drepper added character set conversion functions (iconv).
1638 * Optimized string functions have been added.
1640 * The localedata addon is now part of glibc.
1642 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1644 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1645 daemon for NSS (nscd).
1647 Missing a better place here are some numbers on improvements. Under
1648 Linux 2.1.125 un-tar-ing the kernel sources takes
1652 using local files 12.19s 6.88s 22.91s
1654 using NIS 13.92s 8.91s 26.34s
1656 using NIS & nscd 10.37s 7.34s 25.30s
1658 using NIS+ 27.57s 30.37s 640.46s
1660 using NIS+ & nscd 10.25s 7.83s 26.51s
1662 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1664 Keep in mind that non-namelookup related operations dominate above times.
1665 It was just a common complain that using NIS+ unpacking the kernel is
1668 [1] The old nscd implementation is not available anymore since it was
1669 distributed with glibc up to version 2.0.98 and thus is now replaced.
1671 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1673 * Mark Kettenis provided a Hesiod NSS module.
1675 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1676 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1678 * rcmd can now handle netgroups (Dick Streefland).
1680 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1683 * Support for the IPv6 protocol has been added to the socket API, as per the
1684 latest draft standards.
1686 * Support for Linux 2.2 has been added.
1688 * Interface changes relative to the latest 2.0.x release:
1689 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1690 addseverity NEW: Unix98
1691 alphasort64 NEW: LFS
1692 argp_err_exit_status NEW: argp, GNU ext
1693 argp_error NEW: argp, GNU ext
1694 argp_failure NEW: argp, GNU ext
1695 argp_help NEW: argp, GNU ext
1696 argp_parse NEW: argp, GNU ext
1697 argp_program_bug_address NEW: argp, GNU ext
1698 argp_program_version NEW: argp, GNU ext
1699 argp_program_version_hook NEW: argp, GNU ext
1700 argp_state_help NEW: argp, GNU ext
1701 argp_usage NEW: argp, GNU ext
1702 authdes_create NEW: Secure RPC
1703 authdes_getucred NEW: Secure RPC
1704 authdes_pk_create NEW: Secure RPC
1705 backtrace NEW: GNU ext.
1706 backtrace_symbols NEW: GNU ext.
1707 backtrace_symbols_fd NEW: GNU ext.
1709 cacosf NEW: ISO C 9x
1710 cacosh NEW: ISO C 9x
1711 cacoshf NEW: ISO C 9x
1712 cacoshl NEW: ISO C 9x
1713 cacosl NEW: ISO C 9x
1720 casinf NEW: ISO C 9x
1721 casinh NEW: ISO C 9x
1722 casinhf NEW: ISO C 9x
1723 casinhl NEW: ISO C 9x
1724 casinl NEW: ISO C 9x
1726 catanf NEW: ISO C 9x
1727 catanh NEW: ISO C 9x
1728 catanhf NEW: ISO C 9x
1729 catanhl NEW: ISO C 9x
1730 catanl NEW: ISO C 9x
1731 cbc_crypt NEW: Secure RPC
1735 ccoshf NEW: ISO C 9x
1736 ccoshl NEW: ISO C 9x
1742 cimagf NEW: ISO C 9x
1743 cimagl NEW: ISO C 9x
1744 clearerr_locked REMOVED
1745 clntunix_create NEW: sunrpc ext
1747 clog10 NEW: ISO C 9x
1748 clog10f NEW: ISO C 9x
1749 clog10l NEW: ISO C 9x
1759 cprojf NEW: ISO C 9x
1760 cprojl NEW: ISO C 9x
1762 crealf NEW: ISO C 9x
1763 creall NEW: ISO C 9x
1768 csinhf NEW: ISO C 9x
1769 csinhl NEW: ISO C 9x
1772 csqrtf NEW: ISO C 9x
1773 csqrtl NEW: ISO C 9x
1777 ctanhf NEW: ISO C 9x
1778 ctanhl NEW: ISO C 9x
1780 des_setparity NEW: Secure RPC
1781 ecb_crypt NEW: Secure RPC
1782 endutxent NEW: Unix98
1784 exp10f NEW: ISO C 9x
1785 exp10l NEW: ISO C 9x
1789 fattach NEW: STREAMS
1790 fdetach NEW: STREAMS
1794 feclearexcept NEW: ISO C 9x
1795 fegetenv NEW: ISO C 9x
1796 fegetexceptflag NEW: ISO C 9x
1797 fegetround NEW: ISO C 9x
1798 feholdexcept NEW: ISO C 9x
1800 feraiseexcept NEW: ISO C 9x
1801 ferror_locked REMOVED
1802 fesetenv NEW: ISO C 9x
1803 fesetexceptflag NEW: ISO C 9x
1804 fesetround NEW: ISO C 9x
1805 fetestexcept NEW: ISO C 9x
1806 feupdateenv NEW: ISO C 9x
1807 fflush_locked REMOVED
1811 fgets_unlocked NEW: GNU ext.
1812 fileno_locked REMOVED
1824 fputc_locked REMOVED
1825 fputs_unlocked NEW: GNU ext.
1826 fread_unlocked NEW: GNU ext.
1831 fstatvfs NEW: Unix98
1835 ftruncate64 NEW: LFS
1837 fwrite_unlocked NEW: GNU ext.
1838 gai_strerror NEW: IPv6
1842 getchar_locked REMOVED
1844 getdate_err NEW: Unix98
1845 getdate_r NEW: GNU ext.
1847 getnameinfo NEW: IPv6
1848 getnetname NEW: Secure RPC
1849 getpmsg NEW: STREAMS
1850 getpt NEW: Unix98 PTY
1851 getrlimit64 NEW: LFS
1852 getutxent NEW: Unix98
1853 getutxid NEW: Unix98
1854 getutxline NEW: Unix98
1855 glob64 NEW: GNU ext.
1856 globfree64 NEW: GNU ext.
1857 gnu_get_libc_release NEW: GNU ext.
1858 gnu_get_libc_version NEW: GNU ext.
1859 grantpt NEW: Unix98 PTY
1860 host2netname NEW: Secure RPC
1862 iconv_close NEW: iconv
1863 iconv_open NEW: iconv
1864 if_freenameindex NEW: IPv6
1865 if_indextoname NEW: IPv6
1866 if_nameindex NEW: IPv6
1867 if_nametoindex NEW: IPv6
1868 in6addr_any NEW: IPv6
1869 in6addr_loopback NEW: IPv6
1870 inet6_isipv4mapped NEW: IPv6
1871 isastream NEW: STREAMS
1872 iswblank NEW: GNU ext.
1873 key_decryptsession NEW: Secure RPC
1874 key_decryptsession_pk NEW: Secure RPC
1875 key_encryptsession NEW: Secure RPC
1876 key_encryptsession_pk NEW: Secure RPC
1877 key_gendes NEW: Secure RPC
1878 key_get_conv NEW: Secure RPC
1879 key_secretkey_is_set NEW: Secure RPC
1880 key_setnet NEW: Secure RPC
1881 key_setsecret NEW: Secure RPC
1882 llrint NEW: ISO C 9x
1883 llrintf NEW: ISO C 9x
1884 llrintl NEW: ISO C 9x
1885 llround NEW: ISO C 9x
1886 llroundf NEW: ISO C 9x
1887 llroundl NEW: ISO C 9x
1892 lrintf NEW: ISO C 9x
1893 lrintl NEW: ISO C 9x
1894 lround NEW: ISO C 9x
1895 lroundf NEW: ISO C 9x
1896 lroundl NEW: ISO C 9x
1898 makecontext NEW: Unix98
1899 mempcpy NEW: GNU ext.
1902 modify_ldt NEW: kernel
1906 nearbyint NEW: ISO C 9x
1907 nearbyintf NEW: ISO C 9x
1908 nearbyintl NEW: ISO C 9x
1909 netname2host NEW: Secure RPC
1910 netname2user NEW: Secure RPC
1911 nexttoward NEW: ISO C 9x
1912 nexttowardf NEW: ISO C 9x
1913 nexttowardl NEW: ISO C 9x
1917 passwd2des NEW: Secure RPC
1919 pow10f NEW: GNU ext.
1920 pow10l NEW: GNU ext.
1923 printf_size NEW: GNU ext.
1924 printf_size_info NEW: GNU ext.
1925 profil_counter REMOVED
1926 pthread_mutexattr_getkind_np REPLACED
1927 pthread_mutexattr_setkind_np REPLACED
1928 ptsname NEW: Unix98 PTY
1929 ptsname_r NEW: Unix98 PTY
1931 putchar_locked REMOVED
1932 putgrent NEW: GNU ext.
1934 putpmsg NEW: STREAMS
1935 pututxline NEW: Unix98
1939 readdir64_r NEW: LFS
1940 remquo NEW: ISO C 9x
1941 remquof NEW: ISO C 9x
1942 remquol NEW: ISO C 9x
1944 roundf NEW: ISO C 9x
1945 roundl NEW: ISO C 9x
1947 scalbln NEW: ISO C 9x
1948 scalblnf NEW: ISO C 9x
1949 scalblnl NEW: ISO C 9x
1951 sendfile NEW: kernel
1952 setcontext NEW: Unix98
1953 setrlimit64 NEW: LFS
1954 setutxent NEW: Unix98
1956 sigignore NEW: Unix98
1957 sigqueue NEW: POSIX.1b
1958 sigrelse NEW: Unix98
1959 sigset NEW: POSIX.1b
1960 sigtimedwait NEW: POSIX.1b
1961 sigwaitinfo NEW: POSIX.1b
1962 sincos NEW: GNU ext.
1963 sincosf NEW: GNU ext.
1964 sincosl NEW: GNU ext.
1968 strcasestr NEW: GNU ext.
1969 strtoimax NEW: ISO C 9x
1970 strtoumax NEW: ISO C 9x
1971 strverscmp NEW: GNU ext.
1972 svcauthdes_stats NEW: Secure RPC
1973 svcunix_create NEW: sunrpc etx
1974 svcunixfd_create NEW: sunrpc ext
1975 swapcontext NEW: Unix98
1976 tcgetsid NEW: Unix98 PTY
1977 tdestroy NEW: GNU ext.
1978 tgamma NEW: ISO C 9x
1979 tgammaf NEW: ISO C 9x
1980 tgammal NEW: ISO C 9x
1984 truncf NEW: ISO C 9x
1985 truncl NEW: ISO C 9x
1987 unlockpt NEW: Unix98 PTY
1988 updwtmpx NEW: Unix98
1989 user2netname NEW: Secure RPC
1990 utmpxname NEW: Unix98
1991 versionsort NEW: GNU ext.
1992 versionsort64 NEW: GNU ext.
1994 wcscasecmp NEW: GNU ext.
1995 wcsncasecmp NEW: GNU ext.
1996 wcsnlen NEW: GNU ext.
1997 wcstoimax NEW: ISO C 9x
1998 wcstoll NEW: ISO C 9x
1999 wcstoull NEW: ISO C 9x
2000 wcstoumax NEW: ISO C 9x
2002 wordexp NEW: POSIX.2
2003 wordfree NEW: POSIX.2
2004 write_profiling REMOVED
2005 xdecrypt NEW: Secure RPC
2006 xdr_authdes_cred NEW: Secure RPC
2007 xdr_authdes_verf NEW: Secure RPC
2008 xdr_cryptkeyarg NEW: Secure RPC
2009 xdr_cryptkeyarg2 NEW: Secure RPC
2010 xdr_cryptkeyres NEW: Secure RPC
2011 xdr_getcredres NEW: Secure RPC
2012 xdr_key_netstarg NEW: Secure RPC
2013 xdr_key_netstres NEW: Secure RPC
2014 xdr_keybuf NEW: Secure RPC
2015 xdr_keystatus NEW: Secure RPC
2016 xdr_netnamestr NEW: Secure RPC
2017 xdr_sizeof NEW: Secure RPC
2018 xdr_unixcred NEW: sunrpc ext
2019 xencrypt NEW: Secure RPC
2020 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2031 * inet_ntoa is thread-safe
2033 * updwtmp is moved from libutil to libc
2035 * rewrite of cbrt function
2037 * update of timezone data
2051 * add atoll function
2053 * fix complex problems in Berkeley DB code
2055 * fix math functions
2059 * fixed lots of header problems (especially Linux/GNU specific)
2061 * dynamic loader preserves all registers
2063 * Roland McGrath provided support for handling of auxiliary objects in
2064 the ELF dynamic loader.
2066 * support for parallel builds is improved
2070 * GNU extensions are no longer declared by default. To enable them you
2071 must define the macro `_GNU_SOURCE' in your program or compile with
2074 * The library has changed from using GNU ld symbol aliases to using weak
2075 symbols where available. The ELF object file format supports weak
2076 symbols; GNU ld also supports weak symbols in the a.out format. (There
2077 is also now support for other GNU ld extensions in ELF. Use the
2078 `--with-elf' option to configure to indicate you have ELF, and
2079 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2080 of many files which contained only symbol aliases, reducing the size of
2081 the source and the compiled library; many other files were renamed to
2082 less cryptic names previously occupied by the symbol alias files.
2083 There is a new header file <elf.h> for programs which operate on
2084 files in the ELF format.
2086 * Converted to Autoconf version 2, so `configure' has more options.
2087 Run `configure --help' to see the details.
2089 * The library can now be configured to build profiling, highly-optimized
2090 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2091 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2092 `configure' enable building these extra libraries. The shared library is
2093 built by default when using both ELF and GNU ld. When shared libraries
2094 are enabled, the new library `-ldl' is available for arbitrary run-time
2095 loading of shared objects; its interface is defined in <dlfcn.h>. The
2096 new header file <link.h> gives access to the internals of the run-time
2097 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2098 application of same name on other systems and it provides information
2099 about dynamically linked binaries.
2101 * The C library now provides the run-time support code for profiling
2102 executables compiled with `-pg'. Programs can control the profiling code
2103 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2104 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2105 the support for this file format was contributed by David Mosberger-Tang.
2107 * The math code has been replaced with a math library based on fdlibm from
2108 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2109 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2110 functions. The math functions now reside in a separate library, so
2111 programs using them will need to use `-lm' their linking commands.
2113 * John C. Bowman contributed optimized ix87 assembler inline functions.
2115 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2116 mechanism similar to that found in Solaris 2. This is now used for the
2117 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2118 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2119 file controls what services are used for each individual database. This
2120 works by loading shared libraries with names specified in `nsswitch.conf',
2121 so service modules can be changed or added at any time without even
2122 relinking any program. Currently there are the file, db, and NIS based
2123 NSS services available.
2125 * The new functions `strtoq' and `strtouq' parse integer values from
2126 strings, like `strtol' and `strtoul', but they return `long long int' and
2127 `unsigned long long int' values, respectively (64-bit quantities).
2129 * The new functions `strtof' and `strtold' parse floating-point values from
2130 strings, like `strtod', but they return `float' and `long double' values,
2131 respectively (on some machines `double' and `long double' are the same).
2133 * Ulrich Drepper has contributed new implementations of the floating-point
2134 printing and reading code used in the `printf' family of functions and
2135 `strtod', `strtof', and `strtold'. These new functions are perfectly
2136 accurate, and much faster than the old ones.
2138 * The implementation of the POSIX locale model was completely rewritten by
2139 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2140 to compile the POSIX locale definition.
2142 * The former dummy implementations of the strcoll and strxfrm function are
2143 now replaced by fully functional code contributed by Ulrich Drepper. The
2144 collation information comes from the POSIX locale definitions.
2146 * The new header <langinfo.h> defines an interface for accessing
2147 various locale-dependent data (using the locale chosen with `setlocale').
2149 * Ulrich Drepper has contributed a new suite of functions for operation on
2150 wide-character and multibyte-character strings, in <wchar.h>;
2151 and classification and case conversion of wide characters, in <wctype.h>.
2152 These new functions are conforming to the ISO C, Amendement 1 specification.
2154 * There is now a second implementation of the standard I/O library available.
2155 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2156 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2158 * You can now use positional parameter specifications in format strings
2159 for the `printf' and `scanf' families of functions. For example,
2160 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2161 ``Number 6, Mr Jones''. This is mainly useful when providing different
2162 format strings for different languages, whose grammars may dictate
2163 different orderings of the values being printed. To support this
2164 feature, the interface for `register_printf_handler' has changed; see
2165 the header file <printf.h> for details.
2167 * The `printf' and `scanf' families of functions now understand a new
2168 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2169 to group numbers as indicated by the locale; for `scanf' and friends, this
2170 says to accept as valid only a number with all the proper grouping
2171 separators in the right places. In the default "C" locale, numbers are
2172 not grouped; but locales for specific countries will define the usual
2173 conventions (i.e. separate thousands with `,' in the US locale).
2175 * The pgrp functions have been regularized, slightly incompatibly but much
2176 less confusingly. The core functions are now `getpgid' and `setpgid',
2177 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2178 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2179 provided for compatibility. There is no longer an incompatible `getpgrp'
2180 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2182 * The new header file <fts.h> and suite of functions simplify programs that
2183 operate on directory trees. This code comes from 4.4 BSD.
2185 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2186 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2187 NSS scheme used in glibc.
2189 * There is a new malloc debugging hook `__memalign_hook'.
2191 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2192 `unsigned int' in <sys/types.h>. These are for compatibility only and
2193 their use is discouraged.
2195 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2196 done differently, so that it works even without GNU ld.
2198 * New function `euidaccess' checks allowed access to a file like `access',
2199 but using the effective IDs instead of the real IDs.
2201 * The time zone data files have been updated for the latest and greatest
2202 local time conventions of the countries of the world.
2204 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2207 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2208 for formatting floating-point numbers. They are provided only for
2209 compatibility; new programs should use `sprintf' instead. There are
2210 also equivalent function for the `long double' floating-point type and
2211 all functions also exist in a reentrant form.
2213 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2214 functions for maintaining the login-record files (primarily of use to
2215 system programs such as `login'), and convenient functions for
2216 allocating and initializing a pseudo-terminal (pty) device.
2218 * Ulrich Drepper has contributed new support for System V style
2219 shared memory and IPC on systems that support it.
2221 * Ulrich Drepper has contributed several miscellaneous new functions found
2222 in System V: The `hsearch' family of functions provide an effective
2223 implementation of hash tables; `a64l' and `l64a' provide a very simple
2224 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2227 * Ulrich Drepper has contributed new reentrant counterparts for the
2228 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2230 * Ulrich Drepper has contributed new, highly-optimized versions of several
2231 string functions for the i486/Pentium family of processors.
2233 * Ulrich Drepper has updated the Linux-specific code, based largely
2234 on work done in Hongjiu Lu's version of GNU libc for Linux.
2235 The GNU library now supports Linux versions 2.0.10 and later,
2236 using the ELF object file format (i[3456]86-*-linux).
2238 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2240 * David Mosberger-Tang and Richard Henderson have ported the C library
2241 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2242 dynamic linking support for ELF/Alpha.
2244 * Richard Henderson contributed several Alpha optimized assembler function
2245 for arithmetic and string handling.
2247 * Ulrich Drepper has contributed a new set of message catalog functions to
2248 support multiple languages using the <libintl.h> interface, for use with
2249 his new package GNU gettext. Translation volunteers have contributed
2250 catalogs of the library's messages in Spanish, German, and Korean.
2252 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2253 program and the `catgets' function for reading the catalog files it
2254 creates. (The <libintl.h> interface is preferred; we include the
2255 <nl_types.h> interface using `catgets' only for source compatibility with
2256 programs already written to use it.)
2258 * New header file <values.h> gives SVID-compatible names for <limits.h>
2261 * Various new macros, declarations, and small header files for compatibility
2264 * New function `group_member' is a convenient way to check if a process has
2265 a given effective group ID.
2267 * When using GCC 2.7 and later, the socket functions are now declared in a
2268 special way so that passing an argument of type `struct sockaddr_in *',
2269 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2270 `struct sockaddr *' type, does not generate a type-clash warning.
2272 * New function `error' declared in header file <error.h> is a convenient
2273 function for printing error messages and optionally exiting; this is the
2274 canonical function used in GNU programs. The new functions `err', `warn',
2275 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2276 doing the same thing.
2278 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2279 POSIX.2 `glob' function to do ~ and {...} expansion.
2281 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2282 `clearenv' which is used in POSIX.9 is also available.
2284 * New function `getsid' returns session ID number on systems that support it.
2286 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2287 files <db.h> and <mpool.h> provide a rich set of functions for several
2288 types of simple databases stored in memory and in files, and <ndbm.h> is
2289 an old `ndbm'-compatible interface using the `db' functions. Link with
2290 `-ldb' to get these functions.
2292 * New macro `strdupa' copies a string like `strdup', but uses local stack
2293 space from `alloca' instead of dynamic heap space from `malloc'.
2295 * New function `strnlen' is like `strlen' but searches only a given maximum
2296 number of characters for the null terminator. `stpncpy', `strndup' and
2297 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2300 * New function `statfs' in header <sys/statfs.h>.
2302 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2303 provide convenient functions for operating on blocks of null-terminated
2306 * A new suite of functions in <utmp.h> handle all the details of reading
2307 and writing the utmp file.
2309 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2312 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2313 completely POSIX compliant and also implemented the extended functionality
2314 to handle alternate digit representation and alternate era date formats.
2316 * Ulrich Drepper provided an implementation of the `strptime' function
2317 defined in XPG4.2 which transforms a string into a `struct tm' value.
2319 * Paul Eggert provided the tzselect shell script as part of the timezone
2320 code. The shell script makes it easy to select the correct timezone
2323 * The implementation of the malloc family of functions is completely replaced
2324 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2325 The implementation uses the mmap function (if available) and it is
2326 optimized for the use in multi threaded programs.
2328 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2329 functions. This new functionality is usable by specifying a special
2330 salt string and it is compatible with implementation on *BSD systems.
2332 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2333 `getsubopt' to handle second level command line options, `bsd_signal'
2334 to access BSD style `signal' functionality, the obsolete `regexp' style
2337 * the `lchown' function is available on system which support this
2340 * The implementation of the shadow password handling function was contributed
2343 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2345 * POSIX.1g support was added. The <sys/select.h> header is available,
2346 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2347 implementation of `getaddrinfo'.
2351 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2353 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2354 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2356 * The new function `daemon' from 4.4 BSD is useful for server programs that
2357 want to put themselves in the background.
2359 * Joel Sherrill has contributed support for several standalone boards that
2360 run without an operating system.
2362 * `printf', `scanf' and friends now accept a `q' type modifier for long
2363 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2365 * All of the code taken from BSD (notably most of the math and networking
2366 routines) has been updated from the BSD 4.4-Lite release.
2368 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2370 * The new functions `getdomainname' and `setdomainname' fetch or change the
2371 YP/NIS domain name. These are system calls which exist on systems which
2374 * The time zone data files have been updated for the latest international
2377 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2378 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2382 * The C library now includes support for Sun RPC, from Sun's free
2383 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2384 are included. (There is still no support for YP.)
2386 * Tom Quinn has contributed a port of the C library to SGI machines running
2387 Irix 4 (mips-sgi-irix4).
2389 * The new `lockf' function is a simplified interface to the locking
2390 facilities of `fcntl', included for compatibility.
2392 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2394 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2396 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2399 * The error message printed by `assert' for a failed assertion now includes
2400 the name of the program (if using GNU ld) and the name of the calling
2401 function (with versions of GCC that support this).
2403 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2405 * The library now includes the <sys/mman.h> header file and memory
2406 management functions `mmap', `munmap', `mprotect', `msync', and
2407 `madvise', on systems that support those facilities.
2409 * The interface for `mcheck' has changed slightly: the function called to
2410 abort the program when an allocation inconsistency is detected now takes
2411 an argument that indicates the type of failure. The new function
2412 `mprobe' lets you request a consistency check for a particular block at
2413 any time (checks are normally done only when you call `free' or `realloc'
2416 * It is now possible to easily cross-compile the C library, building on one
2417 system a library to run on another machine and/or operating system. All
2418 you need to do is set the variable `HOST_CC' in `configparms' to the
2419 native compiler for programs to run on the machine you are building on (a
2420 few generator programs are used on Unix systems); set `CC' to the
2423 * The new function `fexecve' (only implemented on the GNU system) executes
2424 a program file given a file descriptor already open on the file.
2428 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2429 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2431 * You can set the variable `libprefix' in `configparms' to specify a prefix
2432 to be prepended to installed library files; this makes it easy to install
2433 the GNU C library to be linked as `-lgnuc' or whatever.
2435 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2436 copies a limited number of characters from a string, and returns the
2437 address of the last character written.
2439 * You no longer need to check for whether the installed `stddef.h' is
2440 compatible with the GNU C library. configure now checks for you.
2442 * You can now define a per-stream `fileno' function to convert the
2443 stream's cookie into an integral file descriptor.
2445 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2446 allocates zero bytes of storage, and returns a unique pointer which
2447 you can pass to `realloc' or `free'. The behavior is undefined if
2448 you dereference this pointer.
2450 * The C library now runs on Sony NEWS m68k machines running either
2451 NewsOS 3 or NewsOS 4.
2453 * The new `syscall' function is a system-dependent primitive function
2454 for invoking system calls. It has the canonical behavior on Unix
2455 systems, including unreliable return values for some calls (such as
2456 `pipe', `fork' and `getppid').
2458 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2459 to `EAGAIN', which is the preferred name. On systems whose kernels
2460 use two distinct codes, the C library now translates EWOULDBLOCK to
2461 EAGAIN in every system call function.
2465 * The GNU C Library Reference Manual is now distributed with the library.
2466 `make dvi' will produce a DVI file of the printed manual.
2467 `make info' will produce Info files that you can read on line using C-h i
2468 in Emacs or the `info' program.
2469 Please send comments on the manual to bug-glibc-manual@gnu.org.
2471 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2473 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2475 * Jason Merrill has contributed a port to the Sequent Symmetry running
2476 Dynix version 3 (i386-sequent-dynix).
2478 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2479 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2481 * New function `memory_warnings' lets you arrange to get warnings when
2482 malloc is running out of memory to allocate, like Emacs gives you.
2484 * The C library now contains the relocating allocator used in Emacs 19 for
2485 its editing buffers. This allocator (ralloc) minimizes allocation
2486 overhead and fragmentation by moving allocated regions around whenever it
2487 needs to. You always refer to a ralloc'd region with a "handle" (a
2488 pointer to a pointer--an object of type `void **').
2490 * There is a new `printf' format: `%m' gives you the string corresponding
2491 to the error code in `errno'.
2493 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2494 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2495 pass, the `a' modifier says to fill in a `char **' you pass with a
2498 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2499 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2500 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2502 * `mkstemp' is a traditional Unix function to atomically create and open a
2503 uniquely-named temporary file.
2507 * The standard location for the file that says what the local timezone is
2508 has changed again. It is now `/usr/local/etc/localtime' (or more
2509 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2511 * The distribution no longer contains any files with names longer than 14
2514 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2515 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2517 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2521 * The configuration process has changed quite a bit. The `configure'
2522 script is now used just like the configuration scripts for other GNU
2523 packages. The `sysdeps' directory hierarchy is much rearranged.
2524 The file `INSTALL' explains the new scheme in detail.
2526 * The header files no longer need to be processed into ANSI C and
2527 traditional C versions. There is just one set of files to install, and
2528 it will work with ANSI or old C compilers (including `gcc -traditional').
2530 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2531 MIPS DECStation running Ultrix 4.
2533 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2534 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2535 made itself into a shared library.
2537 * Yet further improved support for the i386, running 4.3 BSD-like systems
2538 (such as Mach 3 with the Unix single-server), or System V.
2540 * New function `strncasecmp' to do case-insensitive string comparison
2541 with limited length.
2543 * New function `strsep' is a reentrant alternative to `strtok'.
2545 * New functions `scandir' and `alphasort' for searching directories.
2547 * New function `setenv' is a better interface to `putenv'.
2549 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2550 function for traversing a directory tree.
2552 * The GNU obstack package is now also part of the C library.
2553 The new function `open_obstack_stream' creates a stdio stream that
2554 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2555 formatted output directly to an obstack.
2557 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2558 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2560 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2562 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2563 things to your strings.
2565 * There are some new test programs: test-fseek, testmb, and testrand.
2567 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2568 These ports are not finished, but are a good starting place for really
2569 supporting those systems.
2571 * `/etc/localtime' is now the standard location for the file that says what
2572 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2573 This follows the general principle that `/etc' is the place for all local
2574 configuration files.
2576 * The C library header files now use `extern "C"' when used by the C++
2577 compiler, so the C library should now work with C++ code.
2579 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2580 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2583 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2584 function which uses the `merge sort' algorithm, and is said to be
2585 significantly faster than the old GNU `qsort' function. Merge sort is
2586 now the standard `qsort' function. The new algorithm can require a lot
2587 of temporary storage; so, the old sorting function is called when the
2588 required storage is not available.
2590 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2591 provides the Unix `crypt' function, plus some other entry points.
2593 * The code and header files taken from 4.4 BSD have been updated with the
2594 latest files released from Berkeley.
2596 ----------------------------------------------------------------------
2597 Copyright information:
2599 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2601 Permission is granted to anyone to make or distribute verbatim copies
2602 of this document as received, in any medium, provided that the
2603 copyright notice and this permission notice are preserved,
2604 thus giving the recipient permission to redistribute in turn.
2606 Permission is granted to distribute modified versions
2607 of this document, or of portions of it,
2608 under the above conditions, provided also that they
2609 carry prominent notices stating who last changed them.
2612 version-control: never