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, 17844, 17848
22 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
23 implementations for powerpc64/powerpc64le.
24 Implemented by Adhemerval Zanella (IBM).
26 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
27 and powerpc64le. This may improve lock scaling of existing programs on
28 HTM capable systems. The lock elision code is only enabled with
29 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
30 powerpc will issue a transaction abort on every syscall to avoid side
31 effects being visible outside transactions.
33 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
34 AArch64. Contributed by ARM Ltd.
36 * i386 memcpy functions optimized with SSE2 unaligned load/store.
38 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
39 under certain input conditions resulting in the execution of a shell for
40 command substitution when the applicaiton did not request it. The
41 implementation now checks WRDE_NOCMD immediately before executing the
42 shell and returns the error WRDE_CMDSUB as expected.
44 * CVE-2012-3406 printf-style functions could run into a stack overflow when
45 processing format strings with a large number of format specifiers.
47 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
48 infinite loop if the DNS response contained a PTR record of an unexpected
51 * The minimum GCC version that can be used to build this version of the GNU
52 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
53 still be used to compile programs using the GNU C Library.
55 * The GNU C Library is now built with -Werror by default. This can be
56 disabled by configuring with --disable-werror.
58 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
60 * The obsolete sigvec function has been removed. This was the original
61 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
62 programs have been using instead for about 25 years. Of course, ABI
63 compatibility for old binaries using sigvec remains intact.
65 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
66 with newer versions of bison.
68 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
69 The original MIPS o32 hard-float ABI requires an FPU where double-precision
70 registers overlay two consecutive single-precision registers. MIPS32R2
71 introduced a new FPU mode (FR=1) where double-precision registers extend the
72 corresponding single-precision registers which is incompatible with the
73 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
74 require the use of FR=1 making a transition necessary. New o32 ABI
75 extensions enable users to migrate over time from the original o32 ABI
76 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
77 tracks the ABI of any loaded object and verifies that new objects are
78 compatible. Mode transitions will also be requested as required and
79 unsupportable objects will be rejected. The ABI checks include both soft and
80 hard float ABIs for o32, n32 and n64.
82 GCC 5 with GNU binutils 2.25 onwards:
83 It is strongly recommended that all o32 system libraries are built using the
84 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
85 with the original and all new o32 ABI extensions. Configure a MIPS GCC
86 compiler using --with-fp-32=xx to set this by default.
90 * The following bugs are resolved with this release:
92 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
93 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
94 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
95 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
96 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
97 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
98 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
99 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
100 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
101 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
102 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
103 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
104 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
105 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
106 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
108 * Reverted change of ABI data structures for s390 and s390x:
109 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
110 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
111 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
112 are preserved pointing straight to the same implementation as the old ones.
113 Given that, new callers will simply provide a too-big buffer to these
114 functions. Any applications/libraries out there that embed jmp_buf or
115 ucontext_t in an ABI-relevant data structure that have already been rebuilt
116 against 2.19 headers will have to rebuilt again. This is necessary in any
117 case to revert the breakage in their ABI caused by the glibc change.
119 * Support for file description locks is added to systems running the
120 Linux kernel. The standard file locking interfaces are extended to
121 operate on file descriptions, not file descriptors, via the use of
122 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
123 are associated with an open file instead of a process.
125 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
127 * The minimum Linux kernel version that this version of the GNU C Library
128 can be used with is 2.6.32.
130 * Running the testsuite no longer terminates as soon as a test fails.
131 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
132 with PASS or FAIL lines for individual tests. A summary of the results is
133 printed, including a list of failing lists, and "make check" exits with
134 error status if there were any unexpected failures. "make check
135 stop-on-test-failure=y" may be used to keep the old behavior.
137 * The am33 port, which had not worked for several years, has been removed
140 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
141 supported; they now act the same as _DEFAULT_SOURCE (but generate a
142 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
143 conflicted with POSIX (support for which was removed in 2.19), the
144 interfaces those macros enabled remain available when compiling with
145 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
148 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
150 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
151 This may improve lock scaling of existing programs on TX capable systems.
152 The lock elision code is only built with --enable-lock-elision=yes and
153 then requires a GCC version supporting the TX builtins. With lock elision
154 default mutexes are elided via __builtin_tbegin, if the cpu supports
155 transactions. By default lock elision is not enabled and the elision code
158 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
159 copy the path argument. This allowed programs to cause posix_spawn to
160 deference a dangling pointer, or use an unexpected pathname argument if
161 the string was modified after the posix_spawn_file_actions_addopen
164 * All supported architectures now use the main glibc sysdeps directory
165 instead of some being in a separate "ports" directory (which was
166 distributed separately before glibc 2.17).
168 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
169 On configurations that support it (all Linux configurations), it's now
170 used regardless of the --enable-add-ons switch to configure. It is no
171 longer possible to build such configurations without pthreads support.
173 * Locale names, including those obtained from environment variables (LANG
174 and the LC_* variables), are more tightly checked for proper syntax.
175 setlocale will now fail (with EINVAL) for locale names that are overly
176 long, contain slashes without starting with a slash, or contain ".." path
177 components. (CVE-2014-0475) Previously, some valid locale names were
178 silently replaced with the "C" locale when running in AT_SECURE mode
179 (e.g., in a SUID program). This is no longer necessary because of the
182 * On x86-64, the dynamic linker's lazy-binding support is now compatible
183 with application code using Intel MPX instructions. (With all previous
184 versions, the MPX register state could be clobbered when making calls
185 into or out of a shared library.) Note that while the new dynamic
186 linker is compatible with all known x86 hardware whether or not it
187 supports Intel MPX, some x86 instruction-set emulators might fail to
188 handle the new instruction encodings. This is known to affect Valgrind
189 versions up through 3.9 (but will be fixed in the forthcoming 3.10
190 release), and might affect other tools that do instruction emulation.
192 * Support for loadable gconv transliteration modules has been removed.
193 The support for transliteration modules has been non-functional for
194 over a decade, and the removal is prompted by security defects. The
195 normal gconv conversion modules are still supported. Transliteration
196 with //TRANSLIT is still possible, and the //IGNORE specifier
197 continues to be supported. (CVE-2014-5119)
199 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
200 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
201 resulting a denial-of-service security vulnerability in applications which
202 use functions related to iconv. (CVE-2014-6040)
206 * The following bugs are resolved with this release:
208 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
209 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
210 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
211 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
212 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
213 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
214 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
215 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
216 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
217 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
218 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
219 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
220 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
221 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
222 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
223 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
224 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
225 16431, 16453, 16474, 16506, 16510, 16529
227 * Slovenian translations for glibc messages have been contributed by the
228 Translation Project's Slovenian team of translators.
230 * The public headers no longer use __unused nor __block. This change is to
231 support compiling programs that are derived from BSD sources and use
232 __unused internally, and to support compiling with Clang's -fblock
233 extension which uses __block.
235 * CVE-2012-4412 The strcoll implementation caches indices and rules for
236 large collation sequences to optimize multiple passes. This cache
237 computation may overflow for large collation sequences and may cause a
238 stack or buffer overflow. This is now fixed to use a slower algorithm
239 which does not use a cache if there is an integer overflow.
241 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
242 rules for large collation sequences to optimize multiple passes and falls
243 back to alloca if malloc fails, resulting in a possible stack overflow.
244 The implementation now falls back to an uncached collation sequence lookup
247 * CVE-2013-4788 The pointer guard used for pointer mangling was not
248 initialized for static applications resulting in the security feature
249 being disabled. The pointer guard is now correctly initialized to a
250 random value for static applications. Existing static applications need
251 to be recompiled to take advantage of the fix (bug 15754).
253 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
254 to the d_name member of struct dirent, or omit the terminating NUL
255 character. (Bugzilla #14699).
257 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
258 aligned_alloc functions could allocate too few bytes or corrupt the
259 heap when passed very large allocation size values (Bugzilla #15855,
262 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
263 for AF_INET6 has been fixed (Bugzilla #16072).
265 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
266 pap_CW, quz_PE, the_NP.
268 * Substantially revised locales: gd_GB, ht_HT
270 * The LC_ADDRESS field was updated to support country_car for almost all
273 * ISO 1427 definitions were updated.
275 * ISO 3166 definitions were updated.
277 * The localedef utility now supports --big-endian and --little-endian
278 command-line options to generate locales for a different system from that
279 for which the C library was built.
281 * Binary locale files now only depend on the endianness of the system for
282 which they are generated and not on other properties of that system. As a
283 consequence, binary files generated with new localedef may be incompatible
284 with old versions of the GNU C Library, and binary files generated with
285 old localedef may be incompatible with this version of the GNU C Library,
286 in the following circumstances:
288 + Locale files may be incompatible on m68k systems.
290 + Locale archive files (but not separate files for individual locales) may
291 be incompatible on systems where plain "char" is signed.
293 * The configure option --disable-versioning has been removed. Builds with
294 --disable-versioning had not worked for several years.
296 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
297 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
299 * SystemTap probes for malloc have been introduced.
301 * SystemTap probes for slow multiple precision fallback paths of
302 transcendental functions have been introduced.
304 * Support for powerpc64le has been added.
306 * The soft-float powerpc port now supports e500 processors.
308 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
310 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
311 set of header declarations that are enabled by default, even when other
312 feature test macros or compiler options such as -std=c99 would otherwise
313 disable some of those declarations.
315 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
316 conflict with POSIX. The libbsd-compat library (which was a dummy library
317 that did nothing) has also been removed.
319 * Preliminary documentation about Multi-Thread, Async-Signal and
320 Async-Cancel Safety has been added.
322 * Change of ABI data structures for s390 and s390x:
323 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
324 allow for future hardware extensions. All library functions that accept or
325 return these structures were versioned in order to provide backwards
326 compatibility with existing code. However, not all cases can be handled
327 with interface versioning. If an application embeds either structure into
328 another structure and that structure is passed to another compilation unit
329 which expects the newer larger-sized object then any access to the new
330 fields will result in undefined behaviour. Similarly any access to fields
331 that were moved by the enlarging of the structures will cause undefined
332 behaviour. To fix the undefined behaviour all objects that are part of the
333 final in-memory image must agree on the size of structures, and this may
334 require recompilation.
338 * The following bugs are resolved with this release:
340 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
341 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
342 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
343 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
344 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
345 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
346 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
347 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
348 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
349 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
350 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
351 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
352 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
355 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
356 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
357 Distributions can re-enable building and using pt_chown via the new configure
358 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
359 considerable security risks and should only be used if the distribution
360 understands and accepts the risks.
362 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
365 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
366 fixed (Bugzilla #15330).
368 * Add support for calling C++11 thread_local object destructors on thread
369 and program exit. This needs compiler support for offloading C++11
370 destructor calls to glibc.
372 * Improved worst case performance of libm functions with double inputs and
375 * Support for priority inherited mutexes in pthread condition variables on
376 non-x86 architectures.
378 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
380 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
382 * Optimized string functions for ARM. Implemented by Will Newton and
385 * Optimized libm functions for SPARC. Implemented by David S. Miller.
387 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
390 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
391 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
393 * Added a benchmark framework to track performance of functions in glibc.
395 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
396 It is based on draft TS 18661 and currently enabled as a GNU extension.
398 * On Linux, the clock function now uses the clock_gettime system call
399 for improved precision, rather than old times system call.
401 * Added support for version-3 tz format files. This is needed when using
402 the tz database release 2013e or later, and affects a few unusual cases --
403 currently only TZ='America/Godthab' for time stamps after 2037.
405 * Added new API functions pthread_getattr_default_np and
406 pthread_setattr_default_np to get and set the default pthread
407 attributes of a process.
409 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
410 This may improve lock scaling of existing programs on TSX capable systems.
411 When the --enable-lock-elision=yes parameter is specified at configure
412 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
415 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
416 availability). Implemented by Ryan S. Arnold.
418 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
422 * The following bugs are resolved with this release:
424 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
425 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
426 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
427 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
428 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
429 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
430 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
431 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
432 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
433 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
434 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
435 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
436 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
437 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
438 14879, 14889, 14893, 14898, 14914.
440 * Optimization of memcpy for MIPS.
442 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
443 EMFILE has been fixed (Bugzilla #14889).
445 * The add-on ports collection is now distributed in the "ports" subdirectory
446 of the main GNU C Library distribution, rather than separately.
448 * Port to ARM AArch64 contributed by Linaro.
450 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
451 Optimized versions of memcpy, memset, and memcmp added for System z10 and
453 Implemented by Andreas Krebbel.
455 * The new function secure_getenv allows secure access to the environment,
456 returning NULL if running in a SUID/SGID process. This function replaces
457 the internal function __secure_getenv.
459 * SystemTap static probes have been added into the dynamic linker.
460 Implemented by Gary Benson.
462 * Optimizations of string functions strstr, strcasestr and memmem.
463 Implemented by Maxim Kuvyrkov.
465 * The minimum Linux kernel version that this version of the GNU C Library
466 can be used with is 2.6.16.
468 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
469 powerpc POWER7. Implemented by Will Schmidt.
471 * New configure option --disable-nscd builds the C library such that it
472 never attempts to contact the Name Service Caching Daemon (nscd).
473 New configure option --disable-build-nscd avoids building nscd itself;
474 this is the default if --disable-nscd is used.
476 * Improved support for cross-compilation, including cross-testing and
477 bootstrap builds without a previously built glibc.
479 * Several testsuite tests are now able to test multiple IFUNC variants of an
480 interface, rather than just testing the one that would be chooen by
483 * New configure options --with-bugurl and --with-pkgversion, for
484 distributors to use to embed their bug-reporting and package version
485 information in --help and --version output.
487 * The ttyname and ttyname_r functions on Linux now fall back to searching for
488 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
489 allows creation of chroots without the procfs mounted on /proc.
491 * The `crypt' function now fails if passed salt bytes that violate the
492 specification for those values. On Linux, the `crypt' function will
493 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
494 enabled, and fail on encrypted strings using the MD5 or DES algorithm
495 when the mode is enabled.
497 * The `clock_*' suite of functions (declared in <time.h>) is now available
498 directly in the main C library. Previously it was necessary to link with
499 -lrt to use these functions. This change has the effect that a
500 single-threaded program that uses a function such as `clock_gettime' (and
501 is not linked with -lrt) will no longer implicitly load the pthreads
502 library at runtime and so will not suffer the overheads associated with
503 multi-thread support in other code such as the C++ runtime library.
505 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
510 * The following bugs are resolved with this release:
512 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
513 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
514 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
515 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
516 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
517 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
518 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
519 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
520 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
521 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
522 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
523 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
524 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
525 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
526 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
527 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
528 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
529 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
530 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
531 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
532 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
533 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
536 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
537 configuring glibc with:
538 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
539 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
540 Implemented by H.J. Lu.
544 + define static_assert
546 + do not declare gets
548 + declare at_quick_exit and quick_exit also for ISO C11
550 + aligned_alloc. NB: The code is deliberately allows the size parameter
551 to not be a multiple of the alignment. This is a moronic requirement
552 in the standard but it is only a requirement on the caller, not the
557 + uchar.h support added
559 + CMPLX, CMPLXF, CMPLXL added
561 Implemented by Ulrich Drepper.
563 * Support for the IA-64 has been moved to ports.
565 * Remove support for anything but ELF binary format
567 * Checking versions of poll, ppoll added.
568 Implemented by Ulrich Drepper.
570 * More generic and 64-bit performance optimizations to math functions.
571 Implemented by Ulrich Drepper.
573 * New configure option --enable-obsolete-rpc makes the deprecated RPC
574 headers and functions available at compile time as they were before
575 version 2.14. This option will be removed at some time in the future
576 after the TI-RPC library becomes fully sufficient for the needs of
577 existing applications.
579 * Compatibility code for Linux kernel versions before 2.4 has been removed.
580 Note that glibc is not expected to work with any Linux kernel version
583 * New header <sys/auxv.h> and function getauxval allowing easy access to
584 the AT_* key-value pairs passed from the Linux kernel. The header also
585 defines the HWCAP_* bits associated with the AT_HWCAP key.
587 * New locales: mag_IN
589 * New configure option --enable-systemtap builds SystemTap static probes
590 into libc for setjmp and longjmp and into libpthread for various operations.
591 So far the setjmp/longjmp probes and some of the libpthread probes are
592 provided only for i*86 and x86_64.
593 Implemented by Roland McGrath and Rayson Ho.
595 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
597 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
600 * More optimized functions for SPARC. Implemented by David S. Miller.
602 * Improved support for cross-compilation, especially bootstrap builds
603 without a previously built glibc.
605 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
606 Chris Metcalf from Tilera.
608 * Support for the old ARM ABI has been removed from ports. Only the EABI is
609 now supported for ARM processors.
611 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
612 as the name of the dynamic linker, to distinguish it from the
613 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
615 * Support for CRIS has been removed from ports.
617 * A new class of installed header has been documented for low-level
618 platform-specific functionality. PowerPC added the first instance with a
619 function to provide time base register access. Contributed by Tulio
620 Magno Quites Machado Filho.
622 * ix86 configurations now install header files that are consistent with
623 what x86-64 configurations install. These same header files can be used
624 for -m32, -m64, or -mx32 builds.
625 Contributed by H.J. Lu.
627 * Math library bug fixes. A thorough audit of all open math library bugs was
628 conducted by Joseph Myers. Significant progress was made on many math
629 library bugs resulting in more accurate exceptions and function results.
630 Many thanks to all those that contributed including Andreas Jaeger for his
631 patch review and work on the x87 trigonometric instruction issues.
633 * Timezone data is no longer installed. Timezone-related binaries and scripts
634 will continue to be installed. Users should obtain their timezone data from
635 their distribution provider or from the tzdata package at
636 <ftp://munnari.oz.au/pub/>.
640 * The following bugs are resolved with this release:
642 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
643 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
644 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
645 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
646 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
647 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
648 13484, 13506, 13515, 13523, 13524, 13538, 13540
650 * New program pldd to list loaded object of a process
651 Implemented by Ulrich Drepper.
653 * Add nss_db support back to glibc. No more dependency on Berkeley db
654 and support for initgroups lookups.
655 Implemented by Ulrich Drepper.
657 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
658 Contributed by HJ Lu.
660 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
661 Contributed by HJ Lu.
663 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
664 on x86-32 and x86-64.
665 Contributed by Liubov Dmitrieva.
667 * Optimized strchr and strrchr for SSE on x86-32.
668 Contributed by Liubov Dmitrieva.
670 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
671 for x86-64 and x86-32.
672 Contributed by Liubov Dmitrieva.
674 * New interfaces: scandirat, scandirat64
675 Implemented by Ulrich Drepper.
677 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
678 Implemented by Ulrich Drepper.
680 * nscd now also caches the netgroup database.
681 Implemented by Ulrich Drepper.
683 * Integrate libm with gcc's -ffinite-math-only option.
684 Implemented by Ulrich Drepper.
686 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
687 to math functions. Implemented by Ulrich Drepper.
689 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
690 Implemented by Ulrich Drepper.
692 * New Linux interfaces: process_vm_readv, process_vm_writev
694 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
695 Implemented by Ulrich Drepper.
697 * Optimized nearbyint and strcasecmp for PPC.
698 Implemented by Adhemerval Zanella.
700 * New locales: bho_IN, unm_US, es_CU, ta_LK
704 * The following bugs are resolved with this release:
706 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
707 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
708 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
709 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
710 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
711 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
712 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
713 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
714 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
715 12795, 12811, 12813, 12814, 12841
717 * The RPC implementation in libc is obsoleted. Old programs keep working
718 but new programs cannot be linked with the routines in libc anymore.
719 Programs in need of RPC functionality must be linked against TI-RPC.
720 The TI-RPC implementation is IPv6 enabled and there are other benefits.
722 Visible changes of this change include (obviously) the inability to link
723 programs using RPC functions without referencing the TI-RPC library and the
724 removal of the RPC headers from the glibc headers.
725 Implemented by Ulrich Drepper.
727 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
728 syncfs, setns, sendmmsg
730 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
731 yue_HK, lij_IT, mhr_RU
733 * New encodings: CP770, CP771, CP772, CP773, CP774
735 * New program sotruss to trace calls through PLTs
736 Implemented by Ulrich Drepper.
738 * The malloc hook implementation is marked deprecated and will be removed
739 from the default implementation in the next version. The design never
740 worked ever since the introduction of threads. Even programs which do
741 not create threads themselves can use multiple threads created internally.
745 * The following bugs are resolved with this release:
747 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
748 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
749 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
750 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
753 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
755 * POWER7 optimizations: memset, memcmp, strncmp
757 * New optimized string functions for x86-64: strnlen (SSE2),
758 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
759 Implemented by Ulrich Drepper.
763 * The following bugs are resolved with this release:
765 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
766 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
767 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
768 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
769 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
770 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
771 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
772 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
774 * New interfaces: pthread_getname_np, pthread_setname_np
776 * New Linux interface: recvmmsg
778 * STT_GNU_IFUNC implemented for Sparc by David Miller.
780 * The dynamic linker now recognizes supported ABI versions from the
781 EI_ABIVERSION field in the ELF header.
782 Implemented by Ulrich Drepper.
784 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
785 will not be used to fill in password fields in the passwd.byname replies.
786 Instead it is used to synthesize the shadow.byname table, should it be
787 missing. This is a useful mode in some installations involving Solaris.
788 Implemented by Ulrich Drepper.
790 * New locales: kok_IN, sq_MK, cv_RU
794 * The following bugs are resolved with this release:
796 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
797 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
798 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
799 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
800 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
801 10789, 10817, 10823, 10840, 10847
803 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
805 Implemented by Ulrich Drepper.
807 * Checking version of longjmp added that fails if an uninitialized stack
808 frame would be created. Implemented by Ulrich Drepper.
810 * STT_GNU_IFUNC is now supported in static executables.
811 Implemented by H.J. Lu.
813 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
815 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
816 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
817 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
818 Contributed by H.J. Lu.
820 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
821 Implemented by Ulrich Drepper.
823 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
825 Contributed by H.J. Lu.
827 * Support for fma instruction in AVX on x86-64.
828 Implemented by H.J. Lu and Ulrich Drepper.
830 * AVX support in x86-64 auditing support in ld.so.
831 Implemented by H.J. Lu.
833 * STB_GNU_UNIQUE support added.
834 Implemented by Ulrich Drepper.
836 * Implement second fallback mode for optimized DNS lookup for even more
837 broken environments. If two requests from the same port are not
838 handled correctly close the socket and open a new one before sending
839 the second request. The 'single-request-reopen' option in /etc/resolv.conf
840 can be used to select this mode right away, instead of rediscovering the
841 necessity is every process again.
842 Implemented by Ulrich Drepper.
844 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
845 Implemented by Adam Tkac.
847 * Optimized iconv conversions for S390x.
848 Implemented by Andreas Krebbel.
850 * Using condvars with PI mutexes is now more efficient due to kernel
851 support for requeueing to PI futexes. NPTL support added for x86-64.
852 Implemented by Ulrich Drepper.
854 * New locales: ps_AF, my_MM
858 * The following bugs are resolved with this release:
860 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
861 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
862 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
863 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
864 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
866 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
867 Implemented by Ulrich Drepper.
869 * New Linux interfaces: accept4, fallocate, fallocate64.
870 Implemented by Ulrich Drepper.
872 * Correct declarations of string function when used in C++ code. This
873 could lead to compile errors for invalid C++ code.
875 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
878 * New POSIX 2008 interface: psiginfo
879 Implemented by Ulrich Drepper.
881 * New ISO C++1x interfaces: quick_exit, at_quick_exit
882 Implemented by Ulrich Drepper.
884 * Support for selecting between multiple function definitions at runtime
885 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
887 * The libcrypt library can now use the hash function implementations in
888 NSS. Implemented by Ulrich Drepper.
890 * The malloc implementation can be compiled to be less memory efficient
891 but higher performing in multi-threaded programs.
892 Implemented by Ulrich Drepper.
894 * New locales: nan_TW@latin, ks_IN
896 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
897 Implemented by Ulrich Drepper.
899 * Extended printf hook support. It is possible to use user-defined types
900 and extend existing format specifiers.
901 Implemented by Ulrich Drepper.
903 * Handling for group shadow files has been added.
904 Implemented by Ulrich Drepper.
906 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
907 servers (the case, e.g., for some people using the built-in DNS
908 server in ADSL modems/routers). There is a once-per-process timeout
909 in case of a broken server. To avoid it, users can run nscd or put
910 'options single-request' in /etc/resolv.conf.
911 Implemented by Ulrich Drepper.
915 * The following bugs are resolved with this release:
917 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
918 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
919 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
920 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
921 6968, 6974, 6980, 6995, 7008, 7009, 7029
923 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
924 up at the same time. Implemented by Ulrich Drepper.
926 * TLS descriptors for LD and GD on x86 and x86-64.
927 Implemented by Alexandre Oliva.
929 * getaddrinfo now handles DCCP and UDPlite.
930 Implemented by Ulrich Drepper.
932 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
933 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
934 Implemented by Ulrich Drepper.
936 * New implementation of memmem, strstr, and strcasestr which is O(n).
937 Implemented by Eric Blake.
939 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
941 * Implement "e" option for popen to open file descriptor with the
942 close-on-exec flag set. Implemented by Ulrich Drepper.
944 * Implement "b" mode for fmemopen. In this mode writes writes don't
945 implicitly add a NUL byte and seeks from the end of the buffer really
946 use the buffer end, not the string length as the basis.
947 Implemented by Ulrich Drepper.
949 * Many functions, exported and internal, now atomically set the close-on-exec
950 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
952 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
954 Implemented by Pravin Satpute.
956 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
960 * The following bugs are resolved with this release:
962 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
963 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
964 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
965 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
966 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
967 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
968 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
970 * New locales: bo_CN, bo_IN, shs_CA.
972 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
974 * Sorting rules for some Indian languages (Devanagari and Gujarati).
975 Implemented by Pravin Satpute.
977 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
979 * nscd caches now all timeouts for DNS entries
980 Implemented by Ulrich Drepper.
982 * nscd is more efficient and wakes up less often.
983 Implemented by Ulrich Drepper.
985 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
986 vdprintf, and obstack_vprintf.
987 Implemented by Jakub Jelinek.
989 * Faster memset for x86-64.
990 Implemented by Harsha Jagasia and H.J. Lu.
992 * Faster memcpy on x86.
993 Implemented by Ulrich Drepper.
995 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
996 Implemented by Ulrich Drepper.
998 * Faster sqrt and sqrtf implemention for some PPC variants.
999 Implemented by Steven Munroe.
1003 * The following bugs are resolved with this release:
1005 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1006 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1007 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1008 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1009 5071, 5103, 5104, 5112, 5113, 5184, 5186
1011 * More checking functions: fread, fread_unlocked, open*, mq_open.
1012 Implemented by Jakub Jelinek and Ulrich Drepper.
1014 * Extend fortification to C++. Implemented by Jakub Jelinek.
1016 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1017 by not recognizing 'a' as a modifier when those specs are requested.
1018 Implemented by Jakub Jelinek.
1020 * PPC optimizations to math and string functions.
1021 Implemented by Steven Munroe.
1023 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1024 options to be passed. Implemented by Ulrich Drepper.
1026 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1028 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1029 Implemented by Ulrich Drepper.
1031 * Handle private futexes in the NPTL implementation.
1032 Implemented by Jakub Jelinek and Ulrich Drepper.
1034 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1035 Implemented by Roland McGrath and Ulrich Drepper.
1037 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1039 * SHA-256 and SHA-512 based password encryption.
1040 Implemented by Ulrich Drepper.
1042 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1043 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1046 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1047 Implemented by Ulrich Drepper.
1051 * The following bugs are resolved with this release:
1053 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1054 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1055 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1056 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1057 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1058 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1059 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1062 * New Linux interfaces: epoll_pwait, sched_getcpu.
1064 * New generic interfaces: strerror_l.
1066 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1070 * The following bugs are resolved with this release:
1072 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1073 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1074 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1075 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1076 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1077 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1078 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1079 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1080 3225, 3251, 3252, 3253, 3273
1082 * For Linux, the sorting of addresses returned by getaddrinfo now also
1083 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1084 Implemented by Ulrich Drepper.
1086 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1087 Implemented by Ulrich Drepper.
1089 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1091 * New iconv module for MIK. Contributed by Alexander Shopov.
1093 * For sites with broken group and/or passwd database, the auto-propagate
1094 option of nscd can prevent creating ID lookup entries from the results
1095 of a name lookup and vice versa. This usually is no problem but some
1096 site might have problems with the default behavior.
1097 Implemented by Ulrich Drepper.
1099 * Iterating over entire database in NIS can be slow. With the
1100 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1101 to trade time for memory. The entire database will be read at once.
1102 Implemented by Ulrich Drepper.
1104 * The interfaces introduced in RFC 3542 have been implemented by
1107 * Support for the new ELF hash table format was added by Ulrich Drepper.
1109 * Support for priority inheritance mutexes added by Jakub Jelinek and
1112 * Support for priority protected mutexes added by Jakub Jelinek.
1114 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1115 or_IN, csb_PL, fy_NL, sr_ME.
1119 * More overflow detection functions.
1121 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1122 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1124 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1125 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1126 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1127 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1128 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1129 by Masahide Washizawa.
1131 * It is now possible to install audit libraries for the dynamic linker using
1132 LD_AUDIT. Implemented by Ulrich Drepper.
1134 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1135 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1136 For a libc and libpthread that works well on Linux 2.4 kernels, we
1137 recommend using the stable 2.3 branch.
1139 * The new function open_wmemstream acts like open_memstream,
1140 but uses a wchar_t wide character buffer.
1142 * The new function ppoll is an improved version of poll, similar to pselect.
1144 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1145 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1146 renameat, unlinkat, linkat, symlinkat, readlinkat.
1148 * New Linux kernel system calls: unshare,
1149 inotify_init, inotify_add_watch, inotify_rm_watch.
1151 * The euidaccess function is now also known by the alias eaccess,
1152 for compatibility with some other systems.
1154 * Timezone data updated to 2006b version.
1158 * The following bugs are resolved with this release:
1160 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1161 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1162 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1163 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1164 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1165 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1167 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1169 * As of this release, GCC 4 can be used to compile the C Library.
1171 * Timezone data updated to 2005m version.
1175 * The following bugs are resolved with this release:
1177 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1178 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1179 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1180 777, 787, 821, 822, 823, 825
1182 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1186 * Support for RFC 3678. Real implementations exist only for Linux so far.
1187 Implemented by Ulrich Drepper.
1189 * nscd can now cache entries persistently. Expiring entries are reloaded.
1190 For speedups the cache can be shared in memory with client processes.
1191 Implemented by Ulrich Drepper.
1193 * nscd can now perform SELinux checks.
1194 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1196 * getaddrinfo queries are now cached. Canonical name lookup is performed
1198 Implemented by Ulrich Drepper.
1200 * The nothrow function attribute is used when headers are used by gcc when
1201 compiling C code. This can avoid significant amounts of exception
1204 * The malloc functions perform more error checking and are stricter when
1205 it comes to reacting on errors. The default action is to terminate
1206 the process after showing an error message. Implemented by Ulrich Drepper.
1208 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1209 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1211 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1212 namespaces using the new function dlmopen(). This feature is of course,
1213 like most other dynamic loading functionality, not available in statically
1214 linked applications. Implemented by Ulrich Drepper.
1216 * Low-overhead boundary checking variants of string and some stdio functions
1217 were added. These are to be used in conjunction with a gcc patch by
1218 Jakub Jelinek which adds calls to these functions if possible.
1219 Implemented by Jakub Jelinek and Ulrich Drepper.
1221 * Old code for several operating systems and machine architectures that
1222 have not been in working condition in a long time have been removed from
1223 the main source tree maintained by the GNU C Library's maintainers.
1224 These files are now reside in the separate `ports' source module
1225 that is usable as an add-on when building the library.
1229 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1230 interrogate the dynamic linker, compatible with the Solaris interface.
1232 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1233 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1235 * getifaddrs now uses the netlink interface on Linux to get its information.
1236 Implemented by Thorsten Kukuk.
1238 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1239 Implemented by Ulrich Drepper.
1241 * support for non-executable stacks on x86 has been added. Changes mostly
1244 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1247 * getaddrinfo now performs destination address selection according to
1252 * Thread-safe interfaces for many functions that access locale data
1253 were added in version 2.3, but these features were omitted from NEWS.
1254 Many functions have variants with an `_l' suffix that take a `locale_t'
1255 object as a parameter rather than consulting the current locale.
1256 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1257 create and maintain `locale_t' objects. Additionally, the new function
1258 `uselocale' sets "the current locale" (as used by functions not so
1259 parameterized) set for an individual thread. These features were added
1260 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1262 * The functions getresuid, getresgid, setresuid, and setresgid, which
1263 have long been available on Linux, are now declared in <unistd.h>
1264 and are now also available on the Hurd.
1266 * ELF thread-local storage support (TLS) now works on x86-64.
1268 * The new dynamic string token $LIB is expanded in shared library names.
1269 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1271 * Aldy Hernandez contributed complete software floating point support for
1272 PowerPC machines with no FPU.
1274 * fexecve is implemented on Linux.
1276 * The `btowc' function should work at least twice as fast due to
1277 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1279 * With approriate thread add-ons cancelable functions are now implemented
1280 in libc.so as well. No need to call the function in libpthread. This
1281 change allowed to finally disable the incorrect and expensive handling
1282 of weak definition in ld.so.
1284 * Yet more PLT entries in libc.so have been removed. We finally arrived
1285 at the bare minimum. Startup times improved appropriately.
1287 * Support for the new Linux/x86 system call interface was added. The
1288 AT_SYSINFO auxiliary vector entry is recognized and handled.
1292 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1295 * iconv (the program and the interface) now accepts empty names (excluding
1296 options like //TRANSLIT) to mean "use charset of current locale".
1298 * localedef can now transliterate characters in strings which are not in
1299 the provided charmap. The information from the input locale is used.
1301 * Prelinking support was added for ELF targets. This requires additional
1302 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1304 * Read-only stdio streams now use mmap to speed up operation by eliminating
1305 copying and buffer underflows. To use add 'm' to the mode string of
1306 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1308 * The malloc functions were completely rewritten by Wolfram Gloger based
1309 on Doug Lea's malloc-2.7.0.c.
1311 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1312 implementation of regex.
1314 * Bruno Haible upgraded the iconv and locale implementation to support
1317 * Contents of the LC_* and LANG environment variables in the CEN style are
1318 not recognized anymore. It never was used. Change by Ulrich Drepper.
1320 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1321 thread-local storage (TLS) ABI on some platforms.
1322 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1324 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1325 EUC-JISX0213, and TSCII.
1327 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1328 BSD-compatible interface for getting all network interface addresses.
1329 Implementation for IPv4 by Roland McGrath.
1331 * Loading of locale data is faster due to the introduction of a locale
1332 archive. Implemented by Roland McGrath and Ulrich Drepper.
1334 * Startup times are significantly reduced by not using exported functions
1335 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1338 * Steven Munroe contributed a port to PowerPC64/Linux.
1342 * The Hurd now uses the GNU libio implementation of stdio rather than the
1343 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1345 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1346 with the same behavior as the Linux system call of the same name.
1350 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1351 128-bit long double format.
1353 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1354 IBM1161, and IBM1162 charsets.
1356 * Andreas Jaeger contributed a port to x86-64/Linux.
1358 * Peter Bruin contributed a port to PowerPC/Hurd.
1360 * libc functions using I/O streams now can handle wide-oriented streams
1363 * optimizations in the dynamic linker. Binaries created by recent binutils
1364 versions start up quicker due to reduced time spent on relocations.
1366 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1370 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1371 asinh, atanh, j0 for the 128-bit long double format.
1373 * Bruno Haible updated all the code handling Unicode in some form to
1374 support Unicode 3.1.
1376 * Speed of regex for single-byte locales is back to previous levels.
1377 Patch by Isamu Hasegawa.
1379 * Alpha, SPARC, and IA-64 now also using floating stacks.
1381 * Startup time of internationalized applications greatly improved through
1382 iconv cache. Use iconvconfig to generate the cache file.
1383 Contributed by Ulrich Drepper.
1385 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1386 severe performance problems. Patch by David Mosberger.
1388 * The Hurd port got a lot more functionality like AIO, various stdio
1389 extensions, etc. Mainly done by Roland McGrath.
1391 * mtrace can now lookup symbols in shared libraries.
1395 * Intel's IA-64 math library is largely integrated. It provides fast and
1396 accurate implementatations for most basic and standard math functions
1397 in float, double, and long double format.
1399 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1400 and asin for the 96-bit long double format and asin, log, tan for the
1401 128-bit long double format.
1403 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1404 The basic double functions exist today. Contributed by Abraham Ziv
1405 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1406 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1408 * An asynchronous name lookup library was added. The interface is designed
1409 after POSIX AIO. The proposal was circulated beforehand to get comments.
1410 No negative ones came in. Implemented by Ulrich Drepper.
1412 * Port to S390/64bit contributed by Martin Schwidefsky
1413 <schwidefsky@de.ibm.com>.
1415 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1416 of functions for Linux/IA-64.
1418 * The RPC code is now thread safe. Threads can now use the same service
1419 of different services at the same time. Patch by Eric Norum
1420 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1422 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1423 family of functions for Linux/S390.
1425 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1426 of functions for Linux/x86.
1428 * Port to Linux/CRIS contributed by Axis Communications.
1432 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1433 we can now check for namespace violations and missing declarations. The
1434 result is that almost all headers are now Unix-compliant (as defined in
1435 the upcoming XPG6). The negative side is that some programs might need
1436 corrections, too, if they depend on the incorrect form of the headers in
1437 previous versions which defined too many symbols and included too many
1440 * regex now handles multibyte character sets correctly.
1441 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1443 * iconv (the program) does now conform to the upcoming XPG6 and handles
1444 charmaps. Instead of the charset names the path of charmaps can be
1445 provided and the conversion happens based on this data.
1446 Contributed by Ulrich Drepper.
1448 * The locale program now provides detailed information about the installed
1453 only lists the names of the supported locales
1457 provides details such as country, language, and codeset name.
1458 Contributed by Ulrich Drepper.
1462 * The gencat program now parses the input file according to the charset
1463 selected by the LC_CTYPE category. This is important for stateful
1464 character sets. To make generating catalogs easier there is a way
1465 to overwrite the charset selected by the locale: before the first
1466 message or $ quote line the catalog can contain a line like
1468 $ codeset=ISO-8859-2
1470 to select the charset (ISO-8859-2 in this case).
1472 Implemented by Shinya Hanataka and Ulrich Drepper.
1474 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1475 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1476 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1478 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1479 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1481 * The LANGUAGE environment variable is now ignored unless the locale is
1482 changed from the default "C" locale.
1484 * The usual bug fixes.
1488 * Greg McGary added runtime support for bounds checking using gcc's
1489 new -fbounded-pointers option. ix86 target is complete. PowerPC
1492 * Thorsten Kukuk added secure mode support to nscd.
1494 * The Berkeley db libraries have been removed.
1496 Related, the nss_db module is now in a separate package since it
1497 obviously requires a database library being available.
1499 * Wide character I/O streams implemented by Ulrich Drepper.
1501 * Functions from the extended socket API added by Ulrich Drepper.
1503 * Functions feenableexcept and fedisableexcept to control the
1504 behaviour of individual exceptions have been added by Andreas Jaeger.
1506 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1508 * The resolver code has been updated from bind 8.2.3-T5B which supports
1509 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1512 This change could in some situations effect backward compatibility. Since
1513 now `_res' is a thread-local instead of a global variable, modifying it
1514 in one thread does not have any effect in other threads.
1516 The resolver library was also extended to allow IPv6 as the transport
1517 protocol for the requests. This work was done by Stig Venaas.
1519 * Compatibility code for K&R C compilers has been removed from the
1520 header files. A ISO C compiler is needed to use the library
1521 (conforming to either C89 or C99 standard).
1523 * Complete rewrite of the localedef program to support multibyte character
1524 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1525 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1526 Implemented by Ulrich Drepper.
1528 Bruno Haible significantly improved the generation and use of the data
1529 structures for the wide character tables.
1531 * Plural handling in gettext implemented by Ulrich Drepper.
1533 * The utmp daemon has been removed.
1535 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1537 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1540 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1542 * POSIX barriers implemented by Kaz Kylheku.
1544 * POSIX spawn function family implemented by Ulrich Drepper.
1546 * POSIX spinlocks are now available.
1548 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1550 * the configure option --enable-kernel=X.Y.Z allows to strip out
1551 compatibility for kernel versions before X.Y.Z. This is currently only
1552 implemented for Linux.
1554 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1555 field sin6_scope_id. This means that all programs using IPv6 should be
1556 recompiled. Don't expect binary compatibility with previous glibc
1559 * various conversion modules for IBM character sets contributed by
1562 * IA-64 port by Jes Sorensen and HJ Lu.
1576 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1578 * New xdr functions are added; some rpc functions are now 64bit clean.
1580 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1582 * Fixed known incompatibilities with glibc 2.0.
1584 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1586 * Optimized a number of functions (especially the ELF dynamic loader).
1588 * Update timezone data files.
1590 * lots of charmaps corrections
1592 * some new locale definitions and charmaps
1597 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1598 conform to POSIX member type requirements. Symbol versions have been
1599 adjusted as needed within the library, and for direct use by applications,
1600 but there is potential for problems if third-party libraries use
1601 struct timeval as part of their interface. This does not present
1602 a problem for X and other "essential" system libraries.
1604 * An additional locale model to support C++ Standard Library locale
1605 model and probably more was implemented by Ulrich Drepper.
1607 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1610 * Miles Bader provided the `argp' function family to support hierachical
1611 command line argument parsing, layered on top of getopt.
1613 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1615 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1618 * scanf recognizes the %a and %A format for scanning floating point numbers.
1620 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1621 information and interfaces for the available integer types.
1623 * about 130 new math functions were added to implement the ISO C9x math
1626 * the new header <complex.h> contains definitions of the complex math
1627 functions from ISO C 9X.
1629 * the new header <tgmath.h> defines generic macros to use complex or
1630 real valued functions.
1632 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1634 * Andreas Jaeger provided a test suite for the math library.
1636 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1638 * Ulrich Drepper added character set conversion functions (iconv).
1640 * Optimized string functions have been added.
1642 * The localedata addon is now part of glibc.
1644 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1646 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1647 daemon for NSS (nscd).
1649 Missing a better place here are some numbers on improvements. Under
1650 Linux 2.1.125 un-tar-ing the kernel sources takes
1654 using local files 12.19s 6.88s 22.91s
1656 using NIS 13.92s 8.91s 26.34s
1658 using NIS & nscd 10.37s 7.34s 25.30s
1660 using NIS+ 27.57s 30.37s 640.46s
1662 using NIS+ & nscd 10.25s 7.83s 26.51s
1664 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1666 Keep in mind that non-namelookup related operations dominate above times.
1667 It was just a common complain that using NIS+ unpacking the kernel is
1670 [1] The old nscd implementation is not available anymore since it was
1671 distributed with glibc up to version 2.0.98 and thus is now replaced.
1673 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1675 * Mark Kettenis provided a Hesiod NSS module.
1677 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1678 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1680 * rcmd can now handle netgroups (Dick Streefland).
1682 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1685 * Support for the IPv6 protocol has been added to the socket API, as per the
1686 latest draft standards.
1688 * Support for Linux 2.2 has been added.
1690 * Interface changes relative to the latest 2.0.x release:
1691 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1692 addseverity NEW: Unix98
1693 alphasort64 NEW: LFS
1694 argp_err_exit_status NEW: argp, GNU ext
1695 argp_error NEW: argp, GNU ext
1696 argp_failure NEW: argp, GNU ext
1697 argp_help NEW: argp, GNU ext
1698 argp_parse NEW: argp, GNU ext
1699 argp_program_bug_address NEW: argp, GNU ext
1700 argp_program_version NEW: argp, GNU ext
1701 argp_program_version_hook NEW: argp, GNU ext
1702 argp_state_help NEW: argp, GNU ext
1703 argp_usage NEW: argp, GNU ext
1704 authdes_create NEW: Secure RPC
1705 authdes_getucred NEW: Secure RPC
1706 authdes_pk_create NEW: Secure RPC
1707 backtrace NEW: GNU ext.
1708 backtrace_symbols NEW: GNU ext.
1709 backtrace_symbols_fd NEW: GNU ext.
1711 cacosf NEW: ISO C 9x
1712 cacosh NEW: ISO C 9x
1713 cacoshf NEW: ISO C 9x
1714 cacoshl NEW: ISO C 9x
1715 cacosl NEW: ISO C 9x
1722 casinf NEW: ISO C 9x
1723 casinh NEW: ISO C 9x
1724 casinhf NEW: ISO C 9x
1725 casinhl NEW: ISO C 9x
1726 casinl NEW: ISO C 9x
1728 catanf NEW: ISO C 9x
1729 catanh NEW: ISO C 9x
1730 catanhf NEW: ISO C 9x
1731 catanhl NEW: ISO C 9x
1732 catanl NEW: ISO C 9x
1733 cbc_crypt NEW: Secure RPC
1737 ccoshf NEW: ISO C 9x
1738 ccoshl NEW: ISO C 9x
1744 cimagf NEW: ISO C 9x
1745 cimagl NEW: ISO C 9x
1746 clearerr_locked REMOVED
1747 clntunix_create NEW: sunrpc ext
1749 clog10 NEW: ISO C 9x
1750 clog10f NEW: ISO C 9x
1751 clog10l NEW: ISO C 9x
1761 cprojf NEW: ISO C 9x
1762 cprojl NEW: ISO C 9x
1764 crealf NEW: ISO C 9x
1765 creall NEW: ISO C 9x
1770 csinhf NEW: ISO C 9x
1771 csinhl NEW: ISO C 9x
1774 csqrtf NEW: ISO C 9x
1775 csqrtl NEW: ISO C 9x
1779 ctanhf NEW: ISO C 9x
1780 ctanhl NEW: ISO C 9x
1782 des_setparity NEW: Secure RPC
1783 ecb_crypt NEW: Secure RPC
1784 endutxent NEW: Unix98
1786 exp10f NEW: ISO C 9x
1787 exp10l NEW: ISO C 9x
1791 fattach NEW: STREAMS
1792 fdetach NEW: STREAMS
1796 feclearexcept NEW: ISO C 9x
1797 fegetenv NEW: ISO C 9x
1798 fegetexceptflag NEW: ISO C 9x
1799 fegetround NEW: ISO C 9x
1800 feholdexcept NEW: ISO C 9x
1802 feraiseexcept NEW: ISO C 9x
1803 ferror_locked REMOVED
1804 fesetenv NEW: ISO C 9x
1805 fesetexceptflag NEW: ISO C 9x
1806 fesetround NEW: ISO C 9x
1807 fetestexcept NEW: ISO C 9x
1808 feupdateenv NEW: ISO C 9x
1809 fflush_locked REMOVED
1813 fgets_unlocked NEW: GNU ext.
1814 fileno_locked REMOVED
1826 fputc_locked REMOVED
1827 fputs_unlocked NEW: GNU ext.
1828 fread_unlocked NEW: GNU ext.
1833 fstatvfs NEW: Unix98
1837 ftruncate64 NEW: LFS
1839 fwrite_unlocked NEW: GNU ext.
1840 gai_strerror NEW: IPv6
1844 getchar_locked REMOVED
1846 getdate_err NEW: Unix98
1847 getdate_r NEW: GNU ext.
1849 getnameinfo NEW: IPv6
1850 getnetname NEW: Secure RPC
1851 getpmsg NEW: STREAMS
1852 getpt NEW: Unix98 PTY
1853 getrlimit64 NEW: LFS
1854 getutxent NEW: Unix98
1855 getutxid NEW: Unix98
1856 getutxline NEW: Unix98
1857 glob64 NEW: GNU ext.
1858 globfree64 NEW: GNU ext.
1859 gnu_get_libc_release NEW: GNU ext.
1860 gnu_get_libc_version NEW: GNU ext.
1861 grantpt NEW: Unix98 PTY
1862 host2netname NEW: Secure RPC
1864 iconv_close NEW: iconv
1865 iconv_open NEW: iconv
1866 if_freenameindex NEW: IPv6
1867 if_indextoname NEW: IPv6
1868 if_nameindex NEW: IPv6
1869 if_nametoindex NEW: IPv6
1870 in6addr_any NEW: IPv6
1871 in6addr_loopback NEW: IPv6
1872 inet6_isipv4mapped NEW: IPv6
1873 isastream NEW: STREAMS
1874 iswblank NEW: GNU ext.
1875 key_decryptsession NEW: Secure RPC
1876 key_decryptsession_pk NEW: Secure RPC
1877 key_encryptsession NEW: Secure RPC
1878 key_encryptsession_pk NEW: Secure RPC
1879 key_gendes NEW: Secure RPC
1880 key_get_conv NEW: Secure RPC
1881 key_secretkey_is_set NEW: Secure RPC
1882 key_setnet NEW: Secure RPC
1883 key_setsecret NEW: Secure RPC
1884 llrint NEW: ISO C 9x
1885 llrintf NEW: ISO C 9x
1886 llrintl NEW: ISO C 9x
1887 llround NEW: ISO C 9x
1888 llroundf NEW: ISO C 9x
1889 llroundl NEW: ISO C 9x
1894 lrintf NEW: ISO C 9x
1895 lrintl NEW: ISO C 9x
1896 lround NEW: ISO C 9x
1897 lroundf NEW: ISO C 9x
1898 lroundl NEW: ISO C 9x
1900 makecontext NEW: Unix98
1901 mempcpy NEW: GNU ext.
1904 modify_ldt NEW: kernel
1908 nearbyint NEW: ISO C 9x
1909 nearbyintf NEW: ISO C 9x
1910 nearbyintl NEW: ISO C 9x
1911 netname2host NEW: Secure RPC
1912 netname2user NEW: Secure RPC
1913 nexttoward NEW: ISO C 9x
1914 nexttowardf NEW: ISO C 9x
1915 nexttowardl NEW: ISO C 9x
1919 passwd2des NEW: Secure RPC
1921 pow10f NEW: GNU ext.
1922 pow10l NEW: GNU ext.
1925 printf_size NEW: GNU ext.
1926 printf_size_info NEW: GNU ext.
1927 profil_counter REMOVED
1928 pthread_mutexattr_getkind_np REPLACED
1929 pthread_mutexattr_setkind_np REPLACED
1930 ptsname NEW: Unix98 PTY
1931 ptsname_r NEW: Unix98 PTY
1933 putchar_locked REMOVED
1934 putgrent NEW: GNU ext.
1936 putpmsg NEW: STREAMS
1937 pututxline NEW: Unix98
1941 readdir64_r NEW: LFS
1942 remquo NEW: ISO C 9x
1943 remquof NEW: ISO C 9x
1944 remquol NEW: ISO C 9x
1946 roundf NEW: ISO C 9x
1947 roundl NEW: ISO C 9x
1949 scalbln NEW: ISO C 9x
1950 scalblnf NEW: ISO C 9x
1951 scalblnl NEW: ISO C 9x
1953 sendfile NEW: kernel
1954 setcontext NEW: Unix98
1955 setrlimit64 NEW: LFS
1956 setutxent NEW: Unix98
1958 sigignore NEW: Unix98
1959 sigqueue NEW: POSIX.1b
1960 sigrelse NEW: Unix98
1961 sigset NEW: POSIX.1b
1962 sigtimedwait NEW: POSIX.1b
1963 sigwaitinfo NEW: POSIX.1b
1964 sincos NEW: GNU ext.
1965 sincosf NEW: GNU ext.
1966 sincosl NEW: GNU ext.
1970 strcasestr NEW: GNU ext.
1971 strtoimax NEW: ISO C 9x
1972 strtoumax NEW: ISO C 9x
1973 strverscmp NEW: GNU ext.
1974 svcauthdes_stats NEW: Secure RPC
1975 svcunix_create NEW: sunrpc etx
1976 svcunixfd_create NEW: sunrpc ext
1977 swapcontext NEW: Unix98
1978 tcgetsid NEW: Unix98 PTY
1979 tdestroy NEW: GNU ext.
1980 tgamma NEW: ISO C 9x
1981 tgammaf NEW: ISO C 9x
1982 tgammal NEW: ISO C 9x
1986 truncf NEW: ISO C 9x
1987 truncl NEW: ISO C 9x
1989 unlockpt NEW: Unix98 PTY
1990 updwtmpx NEW: Unix98
1991 user2netname NEW: Secure RPC
1992 utmpxname NEW: Unix98
1993 versionsort NEW: GNU ext.
1994 versionsort64 NEW: GNU ext.
1996 wcscasecmp NEW: GNU ext.
1997 wcsncasecmp NEW: GNU ext.
1998 wcsnlen NEW: GNU ext.
1999 wcstoimax NEW: ISO C 9x
2000 wcstoll NEW: ISO C 9x
2001 wcstoull NEW: ISO C 9x
2002 wcstoumax NEW: ISO C 9x
2004 wordexp NEW: POSIX.2
2005 wordfree NEW: POSIX.2
2006 write_profiling REMOVED
2007 xdecrypt NEW: Secure RPC
2008 xdr_authdes_cred NEW: Secure RPC
2009 xdr_authdes_verf NEW: Secure RPC
2010 xdr_cryptkeyarg NEW: Secure RPC
2011 xdr_cryptkeyarg2 NEW: Secure RPC
2012 xdr_cryptkeyres NEW: Secure RPC
2013 xdr_getcredres NEW: Secure RPC
2014 xdr_key_netstarg NEW: Secure RPC
2015 xdr_key_netstres NEW: Secure RPC
2016 xdr_keybuf NEW: Secure RPC
2017 xdr_keystatus NEW: Secure RPC
2018 xdr_netnamestr NEW: Secure RPC
2019 xdr_sizeof NEW: Secure RPC
2020 xdr_unixcred NEW: sunrpc ext
2021 xencrypt NEW: Secure RPC
2022 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2033 * inet_ntoa is thread-safe
2035 * updwtmp is moved from libutil to libc
2037 * rewrite of cbrt function
2039 * update of timezone data
2053 * add atoll function
2055 * fix complex problems in Berkeley DB code
2057 * fix math functions
2061 * fixed lots of header problems (especially Linux/GNU specific)
2063 * dynamic loader preserves all registers
2065 * Roland McGrath provided support for handling of auxiliary objects in
2066 the ELF dynamic loader.
2068 * support for parallel builds is improved
2072 * GNU extensions are no longer declared by default. To enable them you
2073 must define the macro `_GNU_SOURCE' in your program or compile with
2076 * The library has changed from using GNU ld symbol aliases to using weak
2077 symbols where available. The ELF object file format supports weak
2078 symbols; GNU ld also supports weak symbols in the a.out format. (There
2079 is also now support for other GNU ld extensions in ELF. Use the
2080 `--with-elf' option to configure to indicate you have ELF, and
2081 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2082 of many files which contained only symbol aliases, reducing the size of
2083 the source and the compiled library; many other files were renamed to
2084 less cryptic names previously occupied by the symbol alias files.
2085 There is a new header file <elf.h> for programs which operate on
2086 files in the ELF format.
2088 * Converted to Autoconf version 2, so `configure' has more options.
2089 Run `configure --help' to see the details.
2091 * The library can now be configured to build profiling, highly-optimized
2092 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2093 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2094 `configure' enable building these extra libraries. The shared library is
2095 built by default when using both ELF and GNU ld. When shared libraries
2096 are enabled, the new library `-ldl' is available for arbitrary run-time
2097 loading of shared objects; its interface is defined in <dlfcn.h>. The
2098 new header file <link.h> gives access to the internals of the run-time
2099 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2100 application of same name on other systems and it provides information
2101 about dynamically linked binaries.
2103 * The C library now provides the run-time support code for profiling
2104 executables compiled with `-pg'. Programs can control the profiling code
2105 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2106 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2107 the support for this file format was contributed by David Mosberger-Tang.
2109 * The math code has been replaced with a math library based on fdlibm from
2110 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2111 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2112 functions. The math functions now reside in a separate library, so
2113 programs using them will need to use `-lm' their linking commands.
2115 * John C. Bowman contributed optimized ix87 assembler inline functions.
2117 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2118 mechanism similar to that found in Solaris 2. This is now used for the
2119 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2120 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2121 file controls what services are used for each individual database. This
2122 works by loading shared libraries with names specified in `nsswitch.conf',
2123 so service modules can be changed or added at any time without even
2124 relinking any program. Currently there are the file, db, and NIS based
2125 NSS services available.
2127 * The new functions `strtoq' and `strtouq' parse integer values from
2128 strings, like `strtol' and `strtoul', but they return `long long int' and
2129 `unsigned long long int' values, respectively (64-bit quantities).
2131 * The new functions `strtof' and `strtold' parse floating-point values from
2132 strings, like `strtod', but they return `float' and `long double' values,
2133 respectively (on some machines `double' and `long double' are the same).
2135 * Ulrich Drepper has contributed new implementations of the floating-point
2136 printing and reading code used in the `printf' family of functions and
2137 `strtod', `strtof', and `strtold'. These new functions are perfectly
2138 accurate, and much faster than the old ones.
2140 * The implementation of the POSIX locale model was completely rewritten by
2141 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2142 to compile the POSIX locale definition.
2144 * The former dummy implementations of the strcoll and strxfrm function are
2145 now replaced by fully functional code contributed by Ulrich Drepper. The
2146 collation information comes from the POSIX locale definitions.
2148 * The new header <langinfo.h> defines an interface for accessing
2149 various locale-dependent data (using the locale chosen with `setlocale').
2151 * Ulrich Drepper has contributed a new suite of functions for operation on
2152 wide-character and multibyte-character strings, in <wchar.h>;
2153 and classification and case conversion of wide characters, in <wctype.h>.
2154 These new functions are conforming to the ISO C, Amendement 1 specification.
2156 * There is now a second implementation of the standard I/O library available.
2157 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2158 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2160 * You can now use positional parameter specifications in format strings
2161 for the `printf' and `scanf' families of functions. For example,
2162 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2163 ``Number 6, Mr Jones''. This is mainly useful when providing different
2164 format strings for different languages, whose grammars may dictate
2165 different orderings of the values being printed. To support this
2166 feature, the interface for `register_printf_handler' has changed; see
2167 the header file <printf.h> for details.
2169 * The `printf' and `scanf' families of functions now understand a new
2170 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2171 to group numbers as indicated by the locale; for `scanf' and friends, this
2172 says to accept as valid only a number with all the proper grouping
2173 separators in the right places. In the default "C" locale, numbers are
2174 not grouped; but locales for specific countries will define the usual
2175 conventions (i.e. separate thousands with `,' in the US locale).
2177 * The pgrp functions have been regularized, slightly incompatibly but much
2178 less confusingly. The core functions are now `getpgid' and `setpgid',
2179 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2180 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2181 provided for compatibility. There is no longer an incompatible `getpgrp'
2182 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2184 * The new header file <fts.h> and suite of functions simplify programs that
2185 operate on directory trees. This code comes from 4.4 BSD.
2187 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2188 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2189 NSS scheme used in glibc.
2191 * There is a new malloc debugging hook `__memalign_hook'.
2193 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2194 `unsigned int' in <sys/types.h>. These are for compatibility only and
2195 their use is discouraged.
2197 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2198 done differently, so that it works even without GNU ld.
2200 * New function `euidaccess' checks allowed access to a file like `access',
2201 but using the effective IDs instead of the real IDs.
2203 * The time zone data files have been updated for the latest and greatest
2204 local time conventions of the countries of the world.
2206 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2209 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2210 for formatting floating-point numbers. They are provided only for
2211 compatibility; new programs should use `sprintf' instead. There are
2212 also equivalent function for the `long double' floating-point type and
2213 all functions also exist in a reentrant form.
2215 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2216 functions for maintaining the login-record files (primarily of use to
2217 system programs such as `login'), and convenient functions for
2218 allocating and initializing a pseudo-terminal (pty) device.
2220 * Ulrich Drepper has contributed new support for System V style
2221 shared memory and IPC on systems that support it.
2223 * Ulrich Drepper has contributed several miscellaneous new functions found
2224 in System V: The `hsearch' family of functions provide an effective
2225 implementation of hash tables; `a64l' and `l64a' provide a very simple
2226 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2229 * Ulrich Drepper has contributed new reentrant counterparts for the
2230 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2232 * Ulrich Drepper has contributed new, highly-optimized versions of several
2233 string functions for the i486/Pentium family of processors.
2235 * Ulrich Drepper has updated the Linux-specific code, based largely
2236 on work done in Hongjiu Lu's version of GNU libc for Linux.
2237 The GNU library now supports Linux versions 2.0.10 and later,
2238 using the ELF object file format (i[3456]86-*-linux).
2240 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2242 * David Mosberger-Tang and Richard Henderson have ported the C library
2243 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2244 dynamic linking support for ELF/Alpha.
2246 * Richard Henderson contributed several Alpha optimized assembler function
2247 for arithmetic and string handling.
2249 * Ulrich Drepper has contributed a new set of message catalog functions to
2250 support multiple languages using the <libintl.h> interface, for use with
2251 his new package GNU gettext. Translation volunteers have contributed
2252 catalogs of the library's messages in Spanish, German, and Korean.
2254 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2255 program and the `catgets' function for reading the catalog files it
2256 creates. (The <libintl.h> interface is preferred; we include the
2257 <nl_types.h> interface using `catgets' only for source compatibility with
2258 programs already written to use it.)
2260 * New header file <values.h> gives SVID-compatible names for <limits.h>
2263 * Various new macros, declarations, and small header files for compatibility
2266 * New function `group_member' is a convenient way to check if a process has
2267 a given effective group ID.
2269 * When using GCC 2.7 and later, the socket functions are now declared in a
2270 special way so that passing an argument of type `struct sockaddr_in *',
2271 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2272 `struct sockaddr *' type, does not generate a type-clash warning.
2274 * New function `error' declared in header file <error.h> is a convenient
2275 function for printing error messages and optionally exiting; this is the
2276 canonical function used in GNU programs. The new functions `err', `warn',
2277 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2278 doing the same thing.
2280 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2281 POSIX.2 `glob' function to do ~ and {...} expansion.
2283 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2284 `clearenv' which is used in POSIX.9 is also available.
2286 * New function `getsid' returns session ID number on systems that support it.
2288 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2289 files <db.h> and <mpool.h> provide a rich set of functions for several
2290 types of simple databases stored in memory and in files, and <ndbm.h> is
2291 an old `ndbm'-compatible interface using the `db' functions. Link with
2292 `-ldb' to get these functions.
2294 * New macro `strdupa' copies a string like `strdup', but uses local stack
2295 space from `alloca' instead of dynamic heap space from `malloc'.
2297 * New function `strnlen' is like `strlen' but searches only a given maximum
2298 number of characters for the null terminator. `stpncpy', `strndup' and
2299 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2302 * New function `statfs' in header <sys/statfs.h>.
2304 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2305 provide convenient functions for operating on blocks of null-terminated
2308 * A new suite of functions in <utmp.h> handle all the details of reading
2309 and writing the utmp file.
2311 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2314 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2315 completely POSIX compliant and also implemented the extended functionality
2316 to handle alternate digit representation and alternate era date formats.
2318 * Ulrich Drepper provided an implementation of the `strptime' function
2319 defined in XPG4.2 which transforms a string into a `struct tm' value.
2321 * Paul Eggert provided the tzselect shell script as part of the timezone
2322 code. The shell script makes it easy to select the correct timezone
2325 * The implementation of the malloc family of functions is completely replaced
2326 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2327 The implementation uses the mmap function (if available) and it is
2328 optimized for the use in multi threaded programs.
2330 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2331 functions. This new functionality is usable by specifying a special
2332 salt string and it is compatible with implementation on *BSD systems.
2334 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2335 `getsubopt' to handle second level command line options, `bsd_signal'
2336 to access BSD style `signal' functionality, the obsolete `regexp' style
2339 * the `lchown' function is available on system which support this
2342 * The implementation of the shadow password handling function was contributed
2345 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2347 * POSIX.1g support was added. The <sys/select.h> header is available,
2348 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2349 implementation of `getaddrinfo'.
2353 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2355 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2356 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2358 * The new function `daemon' from 4.4 BSD is useful for server programs that
2359 want to put themselves in the background.
2361 * Joel Sherrill has contributed support for several standalone boards that
2362 run without an operating system.
2364 * `printf', `scanf' and friends now accept a `q' type modifier for long
2365 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2367 * All of the code taken from BSD (notably most of the math and networking
2368 routines) has been updated from the BSD 4.4-Lite release.
2370 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2372 * The new functions `getdomainname' and `setdomainname' fetch or change the
2373 YP/NIS domain name. These are system calls which exist on systems which
2376 * The time zone data files have been updated for the latest international
2379 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2380 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2384 * The C library now includes support for Sun RPC, from Sun's free
2385 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2386 are included. (There is still no support for YP.)
2388 * Tom Quinn has contributed a port of the C library to SGI machines running
2389 Irix 4 (mips-sgi-irix4).
2391 * The new `lockf' function is a simplified interface to the locking
2392 facilities of `fcntl', included for compatibility.
2394 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2396 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2398 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2401 * The error message printed by `assert' for a failed assertion now includes
2402 the name of the program (if using GNU ld) and the name of the calling
2403 function (with versions of GCC that support this).
2405 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2407 * The library now includes the <sys/mman.h> header file and memory
2408 management functions `mmap', `munmap', `mprotect', `msync', and
2409 `madvise', on systems that support those facilities.
2411 * The interface for `mcheck' has changed slightly: the function called to
2412 abort the program when an allocation inconsistency is detected now takes
2413 an argument that indicates the type of failure. The new function
2414 `mprobe' lets you request a consistency check for a particular block at
2415 any time (checks are normally done only when you call `free' or `realloc'
2418 * It is now possible to easily cross-compile the C library, building on one
2419 system a library to run on another machine and/or operating system. All
2420 you need to do is set the variable `HOST_CC' in `configparms' to the
2421 native compiler for programs to run on the machine you are building on (a
2422 few generator programs are used on Unix systems); set `CC' to the
2425 * The new function `fexecve' (only implemented on the GNU system) executes
2426 a program file given a file descriptor already open on the file.
2430 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2431 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2433 * You can set the variable `libprefix' in `configparms' to specify a prefix
2434 to be prepended to installed library files; this makes it easy to install
2435 the GNU C library to be linked as `-lgnuc' or whatever.
2437 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2438 copies a limited number of characters from a string, and returns the
2439 address of the last character written.
2441 * You no longer need to check for whether the installed `stddef.h' is
2442 compatible with the GNU C library. configure now checks for you.
2444 * You can now define a per-stream `fileno' function to convert the
2445 stream's cookie into an integral file descriptor.
2447 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2448 allocates zero bytes of storage, and returns a unique pointer which
2449 you can pass to `realloc' or `free'. The behavior is undefined if
2450 you dereference this pointer.
2452 * The C library now runs on Sony NEWS m68k machines running either
2453 NewsOS 3 or NewsOS 4.
2455 * The new `syscall' function is a system-dependent primitive function
2456 for invoking system calls. It has the canonical behavior on Unix
2457 systems, including unreliable return values for some calls (such as
2458 `pipe', `fork' and `getppid').
2460 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2461 to `EAGAIN', which is the preferred name. On systems whose kernels
2462 use two distinct codes, the C library now translates EWOULDBLOCK to
2463 EAGAIN in every system call function.
2467 * The GNU C Library Reference Manual is now distributed with the library.
2468 `make dvi' will produce a DVI file of the printed manual.
2469 `make info' will produce Info files that you can read on line using C-h i
2470 in Emacs or the `info' program.
2471 Please send comments on the manual to bug-glibc-manual@gnu.org.
2473 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2475 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2477 * Jason Merrill has contributed a port to the Sequent Symmetry running
2478 Dynix version 3 (i386-sequent-dynix).
2480 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2481 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2483 * New function `memory_warnings' lets you arrange to get warnings when
2484 malloc is running out of memory to allocate, like Emacs gives you.
2486 * The C library now contains the relocating allocator used in Emacs 19 for
2487 its editing buffers. This allocator (ralloc) minimizes allocation
2488 overhead and fragmentation by moving allocated regions around whenever it
2489 needs to. You always refer to a ralloc'd region with a "handle" (a
2490 pointer to a pointer--an object of type `void **').
2492 * There is a new `printf' format: `%m' gives you the string corresponding
2493 to the error code in `errno'.
2495 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2496 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2497 pass, the `a' modifier says to fill in a `char **' you pass with a
2500 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2501 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2502 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2504 * `mkstemp' is a traditional Unix function to atomically create and open a
2505 uniquely-named temporary file.
2509 * The standard location for the file that says what the local timezone is
2510 has changed again. It is now `/usr/local/etc/localtime' (or more
2511 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2513 * The distribution no longer contains any files with names longer than 14
2516 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2517 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2519 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2523 * The configuration process has changed quite a bit. The `configure'
2524 script is now used just like the configuration scripts for other GNU
2525 packages. The `sysdeps' directory hierarchy is much rearranged.
2526 The file `INSTALL' explains the new scheme in detail.
2528 * The header files no longer need to be processed into ANSI C and
2529 traditional C versions. There is just one set of files to install, and
2530 it will work with ANSI or old C compilers (including `gcc -traditional').
2532 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2533 MIPS DECStation running Ultrix 4.
2535 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2536 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2537 made itself into a shared library.
2539 * Yet further improved support for the i386, running 4.3 BSD-like systems
2540 (such as Mach 3 with the Unix single-server), or System V.
2542 * New function `strncasecmp' to do case-insensitive string comparison
2543 with limited length.
2545 * New function `strsep' is a reentrant alternative to `strtok'.
2547 * New functions `scandir' and `alphasort' for searching directories.
2549 * New function `setenv' is a better interface to `putenv'.
2551 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2552 function for traversing a directory tree.
2554 * The GNU obstack package is now also part of the C library.
2555 The new function `open_obstack_stream' creates a stdio stream that
2556 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2557 formatted output directly to an obstack.
2559 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2560 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2562 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2564 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2565 things to your strings.
2567 * There are some new test programs: test-fseek, testmb, and testrand.
2569 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2570 These ports are not finished, but are a good starting place for really
2571 supporting those systems.
2573 * `/etc/localtime' is now the standard location for the file that says what
2574 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2575 This follows the general principle that `/etc' is the place for all local
2576 configuration files.
2578 * The C library header files now use `extern "C"' when used by the C++
2579 compiler, so the C library should now work with C++ code.
2581 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2582 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2585 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2586 function which uses the `merge sort' algorithm, and is said to be
2587 significantly faster than the old GNU `qsort' function. Merge sort is
2588 now the standard `qsort' function. The new algorithm can require a lot
2589 of temporary storage; so, the old sorting function is called when the
2590 required storage is not available.
2592 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2593 provides the Unix `crypt' function, plus some other entry points.
2595 * The code and header files taken from 4.4 BSD have been updated with the
2596 latest files released from Berkeley.
2598 ----------------------------------------------------------------------
2599 Copyright information:
2601 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2603 Permission is granted to anyone to make or distribute verbatim copies
2604 of this document as received, in any medium, provided that the
2605 copyright notice and this permission notice are preserved,
2606 thus giving the recipient permission to redistribute in turn.
2608 Permission is granted to distribute modified versions
2609 of this document, or of portions of it,
2610 under the above conditions, provided also that they
2611 carry prominent notices stating who last changed them.
2614 version-control: never