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, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
13 15215, 15884, 16009, 16191, 16469, 16617, 16619, 16657, 16740, 16857,
14 17192, 17266, 17273, 17344, 17363, 17370, 17371, 17411, 17460, 17475,
15 17485, 17501, 17506, 17508, 17522, 17555, 17570, 17571, 17572, 17573,
16 17574, 17582, 17583, 17584, 17585, 17589, 17594, 17601, 17608, 17616,
17 17625, 17630, 17633, 17634, 17635, 17647, 17653, 17657, 17658, 17664,
18 17665, 17668, 17682, 17717, 17719, 17722, 17723, 17724, 17725, 17732,
19 17733, 17744, 17745, 17746, 17747, 17748, 17775, 17777, 17780, 17781,
20 17782, 17791, 17793, 17796, 17797, 17803, 17806, 17834, 17844, 17848
22 * A new semaphore algorithm has been implemented in generic C code for all
23 machines. Previous custom assembly implementations of semaphore were
24 difficult to reason about or ensure that they were safe. The new version
25 of semaphore supports machines with 64-bit or 32-bit atomic operations.
26 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
27 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
29 * Port to Altera Nios II has been contributed by Mentor Graphics.
31 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
32 implementations for powerpc64/powerpc64le.
33 Implemented by Adhemerval Zanella (IBM).
35 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
36 and powerpc64le. This may improve lock scaling of existing programs on
37 HTM capable systems. The lock elision code is only enabled with
38 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
39 powerpc will issue a transaction abort on every syscall to avoid side
40 effects being visible outside transactions.
42 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
43 AArch64. Contributed by ARM Ltd.
45 * i386 memcpy functions optimized with SSE2 unaligned load/store.
47 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
48 under certain input conditions resulting in the execution of a shell for
49 command substitution when the applicaiton did not request it. The
50 implementation now checks WRDE_NOCMD immediately before executing the
51 shell and returns the error WRDE_CMDSUB as expected.
53 * CVE-2012-3406 printf-style functions could run into a stack overflow when
54 processing format strings with a large number of format specifiers.
56 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
57 infinite loop if the DNS response contained a PTR record of an unexpected
60 * The minimum GCC version that can be used to build this version of the GNU
61 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
62 still be used to compile programs using the GNU C Library.
64 * The GNU C Library is now built with -Werror by default. This can be
65 disabled by configuring with --disable-werror.
67 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
69 * The obsolete sigvec function has been removed. This was the original
70 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
71 programs have been using instead for about 25 years. Of course, ABI
72 compatibility for old binaries using sigvec remains intact.
74 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
75 with newer versions of bison.
77 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
78 The original MIPS o32 hard-float ABI requires an FPU where double-precision
79 registers overlay two consecutive single-precision registers. MIPS32R2
80 introduced a new FPU mode (FR=1) where double-precision registers extend the
81 corresponding single-precision registers which is incompatible with the
82 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
83 require the use of FR=1 making a transition necessary. New o32 ABI
84 extensions enable users to migrate over time from the original o32 ABI
85 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
86 tracks the ABI of any loaded object and verifies that new objects are
87 compatible. Mode transitions will also be requested as required and
88 unsupportable objects will be rejected. The ABI checks include both soft and
89 hard float ABIs for o32, n32 and n64.
91 GCC 5 with GNU binutils 2.25 onwards:
92 It is strongly recommended that all o32 system libraries are built using the
93 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
94 with the original and all new o32 ABI extensions. Configure a MIPS GCC
95 compiler using --with-fp-32=xx to set this by default.
99 * The following bugs are resolved with this release:
101 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
102 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
103 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
104 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
105 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
106 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
107 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
108 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
109 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
110 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
111 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
112 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
113 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
114 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
115 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
117 * Reverted change of ABI data structures for s390 and s390x:
118 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
119 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
120 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
121 are preserved pointing straight to the same implementation as the old ones.
122 Given that, new callers will simply provide a too-big buffer to these
123 functions. Any applications/libraries out there that embed jmp_buf or
124 ucontext_t in an ABI-relevant data structure that have already been rebuilt
125 against 2.19 headers will have to rebuilt again. This is necessary in any
126 case to revert the breakage in their ABI caused by the glibc change.
128 * Support for file description locks is added to systems running the
129 Linux kernel. The standard file locking interfaces are extended to
130 operate on file descriptions, not file descriptors, via the use of
131 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
132 are associated with an open file instead of a process.
134 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
136 * The minimum Linux kernel version that this version of the GNU C Library
137 can be used with is 2.6.32.
139 * Running the testsuite no longer terminates as soon as a test fails.
140 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
141 with PASS or FAIL lines for individual tests. A summary of the results is
142 printed, including a list of failing lists, and "make check" exits with
143 error status if there were any unexpected failures. "make check
144 stop-on-test-failure=y" may be used to keep the old behavior.
146 * The am33 port, which had not worked for several years, has been removed
149 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
150 supported; they now act the same as _DEFAULT_SOURCE (but generate a
151 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
152 conflicted with POSIX (support for which was removed in 2.19), the
153 interfaces those macros enabled remain available when compiling with
154 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
157 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
159 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
160 This may improve lock scaling of existing programs on TX capable systems.
161 The lock elision code is only built with --enable-lock-elision=yes and
162 then requires a GCC version supporting the TX builtins. With lock elision
163 default mutexes are elided via __builtin_tbegin, if the cpu supports
164 transactions. By default lock elision is not enabled and the elision code
167 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
168 copy the path argument. This allowed programs to cause posix_spawn to
169 deference a dangling pointer, or use an unexpected pathname argument if
170 the string was modified after the posix_spawn_file_actions_addopen
173 * All supported architectures now use the main glibc sysdeps directory
174 instead of some being in a separate "ports" directory (which was
175 distributed separately before glibc 2.17).
177 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
178 On configurations that support it (all Linux configurations), it's now
179 used regardless of the --enable-add-ons switch to configure. It is no
180 longer possible to build such configurations without pthreads support.
182 * Locale names, including those obtained from environment variables (LANG
183 and the LC_* variables), are more tightly checked for proper syntax.
184 setlocale will now fail (with EINVAL) for locale names that are overly
185 long, contain slashes without starting with a slash, or contain ".." path
186 components. (CVE-2014-0475) Previously, some valid locale names were
187 silently replaced with the "C" locale when running in AT_SECURE mode
188 (e.g., in a SUID program). This is no longer necessary because of the
191 * On x86-64, the dynamic linker's lazy-binding support is now compatible
192 with application code using Intel MPX instructions. (With all previous
193 versions, the MPX register state could be clobbered when making calls
194 into or out of a shared library.) Note that while the new dynamic
195 linker is compatible with all known x86 hardware whether or not it
196 supports Intel MPX, some x86 instruction-set emulators might fail to
197 handle the new instruction encodings. This is known to affect Valgrind
198 versions up through 3.9 (but will be fixed in the forthcoming 3.10
199 release), and might affect other tools that do instruction emulation.
201 * Support for loadable gconv transliteration modules has been removed.
202 The support for transliteration modules has been non-functional for
203 over a decade, and the removal is prompted by security defects. The
204 normal gconv conversion modules are still supported. Transliteration
205 with //TRANSLIT is still possible, and the //IGNORE specifier
206 continues to be supported. (CVE-2014-5119)
208 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
209 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
210 resulting a denial-of-service security vulnerability in applications which
211 use functions related to iconv. (CVE-2014-6040)
215 * The following bugs are resolved with this release:
217 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
218 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
219 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
220 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
221 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
222 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
223 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
224 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
225 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
226 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
227 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
228 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
229 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
230 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
231 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
232 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
233 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
234 16431, 16453, 16474, 16506, 16510, 16529
236 * Slovenian translations for glibc messages have been contributed by the
237 Translation Project's Slovenian team of translators.
239 * The public headers no longer use __unused nor __block. This change is to
240 support compiling programs that are derived from BSD sources and use
241 __unused internally, and to support compiling with Clang's -fblock
242 extension which uses __block.
244 * CVE-2012-4412 The strcoll implementation caches indices and rules for
245 large collation sequences to optimize multiple passes. This cache
246 computation may overflow for large collation sequences and may cause a
247 stack or buffer overflow. This is now fixed to use a slower algorithm
248 which does not use a cache if there is an integer overflow.
250 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
251 rules for large collation sequences to optimize multiple passes and falls
252 back to alloca if malloc fails, resulting in a possible stack overflow.
253 The implementation now falls back to an uncached collation sequence lookup
256 * CVE-2013-4788 The pointer guard used for pointer mangling was not
257 initialized for static applications resulting in the security feature
258 being disabled. The pointer guard is now correctly initialized to a
259 random value for static applications. Existing static applications need
260 to be recompiled to take advantage of the fix (bug 15754).
262 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
263 to the d_name member of struct dirent, or omit the terminating NUL
264 character. (Bugzilla #14699).
266 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
267 aligned_alloc functions could allocate too few bytes or corrupt the
268 heap when passed very large allocation size values (Bugzilla #15855,
271 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
272 for AF_INET6 has been fixed (Bugzilla #16072).
274 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
275 pap_CW, quz_PE, the_NP.
277 * Substantially revised locales: gd_GB, ht_HT
279 * The LC_ADDRESS field was updated to support country_car for almost all
282 * ISO 1427 definitions were updated.
284 * ISO 3166 definitions were updated.
286 * The localedef utility now supports --big-endian and --little-endian
287 command-line options to generate locales for a different system from that
288 for which the C library was built.
290 * Binary locale files now only depend on the endianness of the system for
291 which they are generated and not on other properties of that system. As a
292 consequence, binary files generated with new localedef may be incompatible
293 with old versions of the GNU C Library, and binary files generated with
294 old localedef may be incompatible with this version of the GNU C Library,
295 in the following circumstances:
297 + Locale files may be incompatible on m68k systems.
299 + Locale archive files (but not separate files for individual locales) may
300 be incompatible on systems where plain "char" is signed.
302 * The configure option --disable-versioning has been removed. Builds with
303 --disable-versioning had not worked for several years.
305 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
306 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
308 * SystemTap probes for malloc have been introduced.
310 * SystemTap probes for slow multiple precision fallback paths of
311 transcendental functions have been introduced.
313 * Support for powerpc64le has been added.
315 * The soft-float powerpc port now supports e500 processors.
317 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
319 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
320 set of header declarations that are enabled by default, even when other
321 feature test macros or compiler options such as -std=c99 would otherwise
322 disable some of those declarations.
324 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
325 conflict with POSIX. The libbsd-compat library (which was a dummy library
326 that did nothing) has also been removed.
328 * Preliminary documentation about Multi-Thread, Async-Signal and
329 Async-Cancel Safety has been added.
331 * Change of ABI data structures for s390 and s390x:
332 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
333 allow for future hardware extensions. All library functions that accept or
334 return these structures were versioned in order to provide backwards
335 compatibility with existing code. However, not all cases can be handled
336 with interface versioning. If an application embeds either structure into
337 another structure and that structure is passed to another compilation unit
338 which expects the newer larger-sized object then any access to the new
339 fields will result in undefined behaviour. Similarly any access to fields
340 that were moved by the enlarging of the structures will cause undefined
341 behaviour. To fix the undefined behaviour all objects that are part of the
342 final in-memory image must agree on the size of structures, and this may
343 require recompilation.
347 * The following bugs are resolved with this release:
349 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
350 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
351 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
352 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
353 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
354 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
355 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
356 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
357 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
358 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
359 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
360 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
361 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
364 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
365 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
366 Distributions can re-enable building and using pt_chown via the new configure
367 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
368 considerable security risks and should only be used if the distribution
369 understands and accepts the risks.
371 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
374 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
375 fixed (Bugzilla #15330).
377 * Add support for calling C++11 thread_local object destructors on thread
378 and program exit. This needs compiler support for offloading C++11
379 destructor calls to glibc.
381 * Improved worst case performance of libm functions with double inputs and
384 * Support for priority inherited mutexes in pthread condition variables on
385 non-x86 architectures.
387 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
389 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
391 * Optimized string functions for ARM. Implemented by Will Newton and
394 * Optimized libm functions for SPARC. Implemented by David S. Miller.
396 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
399 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
400 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
402 * Added a benchmark framework to track performance of functions in glibc.
404 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
405 It is based on draft TS 18661 and currently enabled as a GNU extension.
407 * On Linux, the clock function now uses the clock_gettime system call
408 for improved precision, rather than old times system call.
410 * Added support for version-3 tz format files. This is needed when using
411 the tz database release 2013e or later, and affects a few unusual cases --
412 currently only TZ='America/Godthab' for time stamps after 2037.
414 * Added new API functions pthread_getattr_default_np and
415 pthread_setattr_default_np to get and set the default pthread
416 attributes of a process.
418 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
419 This may improve lock scaling of existing programs on TSX capable systems.
420 When the --enable-lock-elision=yes parameter is specified at configure
421 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
424 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
425 availability). Implemented by Ryan S. Arnold.
427 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
431 * The following bugs are resolved with this release:
433 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
434 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
435 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
436 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
437 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
438 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
439 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
440 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
441 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
442 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
443 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
444 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
445 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
446 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
447 14879, 14889, 14893, 14898, 14914.
449 * Optimization of memcpy for MIPS.
451 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
452 EMFILE has been fixed (Bugzilla #14889).
454 * The add-on ports collection is now distributed in the "ports" subdirectory
455 of the main GNU C Library distribution, rather than separately.
457 * Port to ARM AArch64 contributed by Linaro.
459 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
460 Optimized versions of memcpy, memset, and memcmp added for System z10 and
462 Implemented by Andreas Krebbel.
464 * The new function secure_getenv allows secure access to the environment,
465 returning NULL if running in a SUID/SGID process. This function replaces
466 the internal function __secure_getenv.
468 * SystemTap static probes have been added into the dynamic linker.
469 Implemented by Gary Benson.
471 * Optimizations of string functions strstr, strcasestr and memmem.
472 Implemented by Maxim Kuvyrkov.
474 * The minimum Linux kernel version that this version of the GNU C Library
475 can be used with is 2.6.16.
477 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
478 powerpc POWER7. Implemented by Will Schmidt.
480 * New configure option --disable-nscd builds the C library such that it
481 never attempts to contact the Name Service Caching Daemon (nscd).
482 New configure option --disable-build-nscd avoids building nscd itself;
483 this is the default if --disable-nscd is used.
485 * Improved support for cross-compilation, including cross-testing and
486 bootstrap builds without a previously built glibc.
488 * Several testsuite tests are now able to test multiple IFUNC variants of an
489 interface, rather than just testing the one that would be chooen by
492 * New configure options --with-bugurl and --with-pkgversion, for
493 distributors to use to embed their bug-reporting and package version
494 information in --help and --version output.
496 * The ttyname and ttyname_r functions on Linux now fall back to searching for
497 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
498 allows creation of chroots without the procfs mounted on /proc.
500 * The `crypt' function now fails if passed salt bytes that violate the
501 specification for those values. On Linux, the `crypt' function will
502 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
503 enabled, and fail on encrypted strings using the MD5 or DES algorithm
504 when the mode is enabled.
506 * The `clock_*' suite of functions (declared in <time.h>) is now available
507 directly in the main C library. Previously it was necessary to link with
508 -lrt to use these functions. This change has the effect that a
509 single-threaded program that uses a function such as `clock_gettime' (and
510 is not linked with -lrt) will no longer implicitly load the pthreads
511 library at runtime and so will not suffer the overheads associated with
512 multi-thread support in other code such as the C++ runtime library.
514 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
519 * The following bugs are resolved with this release:
521 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
522 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
523 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
524 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
525 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
526 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
527 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
528 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
529 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
530 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
531 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
532 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
533 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
534 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
535 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
536 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
537 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
538 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
539 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
540 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
541 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
542 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
545 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
546 configuring glibc with:
547 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
548 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
549 Implemented by H.J. Lu.
553 + define static_assert
555 + do not declare gets
557 + declare at_quick_exit and quick_exit also for ISO C11
559 + aligned_alloc. NB: The code is deliberately allows the size parameter
560 to not be a multiple of the alignment. This is a moronic requirement
561 in the standard but it is only a requirement on the caller, not the
566 + uchar.h support added
568 + CMPLX, CMPLXF, CMPLXL added
570 Implemented by Ulrich Drepper.
572 * Support for the IA-64 has been moved to ports.
574 * Remove support for anything but ELF binary format
576 * Checking versions of poll, ppoll added.
577 Implemented by Ulrich Drepper.
579 * More generic and 64-bit performance optimizations to math functions.
580 Implemented by Ulrich Drepper.
582 * New configure option --enable-obsolete-rpc makes the deprecated RPC
583 headers and functions available at compile time as they were before
584 version 2.14. This option will be removed at some time in the future
585 after the TI-RPC library becomes fully sufficient for the needs of
586 existing applications.
588 * Compatibility code for Linux kernel versions before 2.4 has been removed.
589 Note that glibc is not expected to work with any Linux kernel version
592 * New header <sys/auxv.h> and function getauxval allowing easy access to
593 the AT_* key-value pairs passed from the Linux kernel. The header also
594 defines the HWCAP_* bits associated with the AT_HWCAP key.
596 * New locales: mag_IN
598 * New configure option --enable-systemtap builds SystemTap static probes
599 into libc for setjmp and longjmp and into libpthread for various operations.
600 So far the setjmp/longjmp probes and some of the libpthread probes are
601 provided only for i*86 and x86_64.
602 Implemented by Roland McGrath and Rayson Ho.
604 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
606 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
609 * More optimized functions for SPARC. Implemented by David S. Miller.
611 * Improved support for cross-compilation, especially bootstrap builds
612 without a previously built glibc.
614 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
615 Chris Metcalf from Tilera.
617 * Support for the old ARM ABI has been removed from ports. Only the EABI is
618 now supported for ARM processors.
620 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
621 as the name of the dynamic linker, to distinguish it from the
622 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
624 * Support for CRIS has been removed from ports.
626 * A new class of installed header has been documented for low-level
627 platform-specific functionality. PowerPC added the first instance with a
628 function to provide time base register access. Contributed by Tulio
629 Magno Quites Machado Filho.
631 * ix86 configurations now install header files that are consistent with
632 what x86-64 configurations install. These same header files can be used
633 for -m32, -m64, or -mx32 builds.
634 Contributed by H.J. Lu.
636 * Math library bug fixes. A thorough audit of all open math library bugs was
637 conducted by Joseph Myers. Significant progress was made on many math
638 library bugs resulting in more accurate exceptions and function results.
639 Many thanks to all those that contributed including Andreas Jaeger for his
640 patch review and work on the x87 trigonometric instruction issues.
642 * Timezone data is no longer installed. Timezone-related binaries and scripts
643 will continue to be installed. Users should obtain their timezone data from
644 their distribution provider or from the tzdata package at
645 <ftp://munnari.oz.au/pub/>.
649 * The following bugs are resolved with this release:
651 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
652 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
653 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
654 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
655 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
656 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
657 13484, 13506, 13515, 13523, 13524, 13538, 13540
659 * New program pldd to list loaded object of a process
660 Implemented by Ulrich Drepper.
662 * Add nss_db support back to glibc. No more dependency on Berkeley db
663 and support for initgroups lookups.
664 Implemented by Ulrich Drepper.
666 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
667 Contributed by HJ Lu.
669 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
670 Contributed by HJ Lu.
672 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
673 on x86-32 and x86-64.
674 Contributed by Liubov Dmitrieva.
676 * Optimized strchr and strrchr for SSE on x86-32.
677 Contributed by Liubov Dmitrieva.
679 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
680 for x86-64 and x86-32.
681 Contributed by Liubov Dmitrieva.
683 * New interfaces: scandirat, scandirat64
684 Implemented by Ulrich Drepper.
686 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
687 Implemented by Ulrich Drepper.
689 * nscd now also caches the netgroup database.
690 Implemented by Ulrich Drepper.
692 * Integrate libm with gcc's -ffinite-math-only option.
693 Implemented by Ulrich Drepper.
695 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
696 to math functions. Implemented by Ulrich Drepper.
698 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
699 Implemented by Ulrich Drepper.
701 * New Linux interfaces: process_vm_readv, process_vm_writev
703 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
704 Implemented by Ulrich Drepper.
706 * Optimized nearbyint and strcasecmp for PPC.
707 Implemented by Adhemerval Zanella.
709 * New locales: bho_IN, unm_US, es_CU, ta_LK
713 * The following bugs are resolved with this release:
715 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
716 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
717 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
718 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
719 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
720 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
721 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
722 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
723 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
724 12795, 12811, 12813, 12814, 12841
726 * The RPC implementation in libc is obsoleted. Old programs keep working
727 but new programs cannot be linked with the routines in libc anymore.
728 Programs in need of RPC functionality must be linked against TI-RPC.
729 The TI-RPC implementation is IPv6 enabled and there are other benefits.
731 Visible changes of this change include (obviously) the inability to link
732 programs using RPC functions without referencing the TI-RPC library and the
733 removal of the RPC headers from the glibc headers.
734 Implemented by Ulrich Drepper.
736 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
737 syncfs, setns, sendmmsg
739 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
740 yue_HK, lij_IT, mhr_RU
742 * New encodings: CP770, CP771, CP772, CP773, CP774
744 * New program sotruss to trace calls through PLTs
745 Implemented by Ulrich Drepper.
747 * The malloc hook implementation is marked deprecated and will be removed
748 from the default implementation in the next version. The design never
749 worked ever since the introduction of threads. Even programs which do
750 not create threads themselves can use multiple threads created internally.
754 * The following bugs are resolved with this release:
756 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
757 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
758 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
759 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
762 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
764 * POWER7 optimizations: memset, memcmp, strncmp
766 * New optimized string functions for x86-64: strnlen (SSE2),
767 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
768 Implemented by Ulrich Drepper.
772 * The following bugs are resolved with this release:
774 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
775 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
776 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
777 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
778 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
779 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
780 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
781 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
783 * New interfaces: pthread_getname_np, pthread_setname_np
785 * New Linux interface: recvmmsg
787 * STT_GNU_IFUNC implemented for Sparc by David Miller.
789 * The dynamic linker now recognizes supported ABI versions from the
790 EI_ABIVERSION field in the ELF header.
791 Implemented by Ulrich Drepper.
793 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
794 will not be used to fill in password fields in the passwd.byname replies.
795 Instead it is used to synthesize the shadow.byname table, should it be
796 missing. This is a useful mode in some installations involving Solaris.
797 Implemented by Ulrich Drepper.
799 * New locales: kok_IN, sq_MK, cv_RU
803 * The following bugs are resolved with this release:
805 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
806 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
807 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
808 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
809 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
810 10789, 10817, 10823, 10840, 10847
812 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
814 Implemented by Ulrich Drepper.
816 * Checking version of longjmp added that fails if an uninitialized stack
817 frame would be created. Implemented by Ulrich Drepper.
819 * STT_GNU_IFUNC is now supported in static executables.
820 Implemented by H.J. Lu.
822 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
824 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
825 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
826 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
827 Contributed by H.J. Lu.
829 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
830 Implemented by Ulrich Drepper.
832 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
834 Contributed by H.J. Lu.
836 * Support for fma instruction in AVX on x86-64.
837 Implemented by H.J. Lu and Ulrich Drepper.
839 * AVX support in x86-64 auditing support in ld.so.
840 Implemented by H.J. Lu.
842 * STB_GNU_UNIQUE support added.
843 Implemented by Ulrich Drepper.
845 * Implement second fallback mode for optimized DNS lookup for even more
846 broken environments. If two requests from the same port are not
847 handled correctly close the socket and open a new one before sending
848 the second request. The 'single-request-reopen' option in /etc/resolv.conf
849 can be used to select this mode right away, instead of rediscovering the
850 necessity is every process again.
851 Implemented by Ulrich Drepper.
853 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
854 Implemented by Adam Tkac.
856 * Optimized iconv conversions for S390x.
857 Implemented by Andreas Krebbel.
859 * Using condvars with PI mutexes is now more efficient due to kernel
860 support for requeueing to PI futexes. NPTL support added for x86-64.
861 Implemented by Ulrich Drepper.
863 * New locales: ps_AF, my_MM
867 * The following bugs are resolved with this release:
869 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
870 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
871 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
872 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
873 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
875 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
876 Implemented by Ulrich Drepper.
878 * New Linux interfaces: accept4, fallocate, fallocate64.
879 Implemented by Ulrich Drepper.
881 * Correct declarations of string function when used in C++ code. This
882 could lead to compile errors for invalid C++ code.
884 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
887 * New POSIX 2008 interface: psiginfo
888 Implemented by Ulrich Drepper.
890 * New ISO C++1x interfaces: quick_exit, at_quick_exit
891 Implemented by Ulrich Drepper.
893 * Support for selecting between multiple function definitions at runtime
894 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
896 * The libcrypt library can now use the hash function implementations in
897 NSS. Implemented by Ulrich Drepper.
899 * The malloc implementation can be compiled to be less memory efficient
900 but higher performing in multi-threaded programs.
901 Implemented by Ulrich Drepper.
903 * New locales: nan_TW@latin, ks_IN
905 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
906 Implemented by Ulrich Drepper.
908 * Extended printf hook support. It is possible to use user-defined types
909 and extend existing format specifiers.
910 Implemented by Ulrich Drepper.
912 * Handling for group shadow files has been added.
913 Implemented by Ulrich Drepper.
915 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
916 servers (the case, e.g., for some people using the built-in DNS
917 server in ADSL modems/routers). There is a once-per-process timeout
918 in case of a broken server. To avoid it, users can run nscd or put
919 'options single-request' in /etc/resolv.conf.
920 Implemented by Ulrich Drepper.
924 * The following bugs are resolved with this release:
926 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
927 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
928 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
929 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
930 6968, 6974, 6980, 6995, 7008, 7009, 7029
932 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
933 up at the same time. Implemented by Ulrich Drepper.
935 * TLS descriptors for LD and GD on x86 and x86-64.
936 Implemented by Alexandre Oliva.
938 * getaddrinfo now handles DCCP and UDPlite.
939 Implemented by Ulrich Drepper.
941 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
942 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
943 Implemented by Ulrich Drepper.
945 * New implementation of memmem, strstr, and strcasestr which is O(n).
946 Implemented by Eric Blake.
948 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
950 * Implement "e" option for popen to open file descriptor with the
951 close-on-exec flag set. Implemented by Ulrich Drepper.
953 * Implement "b" mode for fmemopen. In this mode writes writes don't
954 implicitly add a NUL byte and seeks from the end of the buffer really
955 use the buffer end, not the string length as the basis.
956 Implemented by Ulrich Drepper.
958 * Many functions, exported and internal, now atomically set the close-on-exec
959 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
961 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
963 Implemented by Pravin Satpute.
965 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
969 * The following bugs are resolved with this release:
971 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
972 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
973 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
974 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
975 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
976 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
977 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
979 * New locales: bo_CN, bo_IN, shs_CA.
981 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
983 * Sorting rules for some Indian languages (Devanagari and Gujarati).
984 Implemented by Pravin Satpute.
986 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
988 * nscd caches now all timeouts for DNS entries
989 Implemented by Ulrich Drepper.
991 * nscd is more efficient and wakes up less often.
992 Implemented by Ulrich Drepper.
994 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
995 vdprintf, and obstack_vprintf.
996 Implemented by Jakub Jelinek.
998 * Faster memset for x86-64.
999 Implemented by Harsha Jagasia and H.J. Lu.
1001 * Faster memcpy on x86.
1002 Implemented by Ulrich Drepper.
1004 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1005 Implemented by Ulrich Drepper.
1007 * Faster sqrt and sqrtf implemention for some PPC variants.
1008 Implemented by Steven Munroe.
1012 * The following bugs are resolved with this release:
1014 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1015 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1016 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1017 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1018 5071, 5103, 5104, 5112, 5113, 5184, 5186
1020 * More checking functions: fread, fread_unlocked, open*, mq_open.
1021 Implemented by Jakub Jelinek and Ulrich Drepper.
1023 * Extend fortification to C++. Implemented by Jakub Jelinek.
1025 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1026 by not recognizing 'a' as a modifier when those specs are requested.
1027 Implemented by Jakub Jelinek.
1029 * PPC optimizations to math and string functions.
1030 Implemented by Steven Munroe.
1032 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1033 options to be passed. Implemented by Ulrich Drepper.
1035 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1037 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1038 Implemented by Ulrich Drepper.
1040 * Handle private futexes in the NPTL implementation.
1041 Implemented by Jakub Jelinek and Ulrich Drepper.
1043 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1044 Implemented by Roland McGrath and Ulrich Drepper.
1046 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1048 * SHA-256 and SHA-512 based password encryption.
1049 Implemented by Ulrich Drepper.
1051 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1052 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1055 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1056 Implemented by Ulrich Drepper.
1060 * The following bugs are resolved with this release:
1062 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1063 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1064 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1065 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1066 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1067 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1068 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1071 * New Linux interfaces: epoll_pwait, sched_getcpu.
1073 * New generic interfaces: strerror_l.
1075 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1079 * The following bugs are resolved with this release:
1081 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1082 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1083 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1084 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1085 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1086 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1087 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1088 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1089 3225, 3251, 3252, 3253, 3273
1091 * For Linux, the sorting of addresses returned by getaddrinfo now also
1092 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1093 Implemented by Ulrich Drepper.
1095 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1096 Implemented by Ulrich Drepper.
1098 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1100 * New iconv module for MIK. Contributed by Alexander Shopov.
1102 * For sites with broken group and/or passwd database, the auto-propagate
1103 option of nscd can prevent creating ID lookup entries from the results
1104 of a name lookup and vice versa. This usually is no problem but some
1105 site might have problems with the default behavior.
1106 Implemented by Ulrich Drepper.
1108 * Iterating over entire database in NIS can be slow. With the
1109 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1110 to trade time for memory. The entire database will be read at once.
1111 Implemented by Ulrich Drepper.
1113 * The interfaces introduced in RFC 3542 have been implemented by
1116 * Support for the new ELF hash table format was added by Ulrich Drepper.
1118 * Support for priority inheritance mutexes added by Jakub Jelinek and
1121 * Support for priority protected mutexes added by Jakub Jelinek.
1123 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1124 or_IN, csb_PL, fy_NL, sr_ME.
1128 * More overflow detection functions.
1130 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1131 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1133 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1134 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1135 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1136 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1137 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1138 by Masahide Washizawa.
1140 * It is now possible to install audit libraries for the dynamic linker using
1141 LD_AUDIT. Implemented by Ulrich Drepper.
1143 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1144 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1145 For a libc and libpthread that works well on Linux 2.4 kernels, we
1146 recommend using the stable 2.3 branch.
1148 * The new function open_wmemstream acts like open_memstream,
1149 but uses a wchar_t wide character buffer.
1151 * The new function ppoll is an improved version of poll, similar to pselect.
1153 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1154 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1155 renameat, unlinkat, linkat, symlinkat, readlinkat.
1157 * New Linux kernel system calls: unshare,
1158 inotify_init, inotify_add_watch, inotify_rm_watch.
1160 * The euidaccess function is now also known by the alias eaccess,
1161 for compatibility with some other systems.
1163 * Timezone data updated to 2006b version.
1167 * The following bugs are resolved with this release:
1169 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1170 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1171 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1172 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1173 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1174 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1176 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1178 * As of this release, GCC 4 can be used to compile the C Library.
1180 * Timezone data updated to 2005m version.
1184 * The following bugs are resolved with this release:
1186 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1187 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1188 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1189 777, 787, 821, 822, 823, 825
1191 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1195 * Support for RFC 3678. Real implementations exist only for Linux so far.
1196 Implemented by Ulrich Drepper.
1198 * nscd can now cache entries persistently. Expiring entries are reloaded.
1199 For speedups the cache can be shared in memory with client processes.
1200 Implemented by Ulrich Drepper.
1202 * nscd can now perform SELinux checks.
1203 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1205 * getaddrinfo queries are now cached. Canonical name lookup is performed
1207 Implemented by Ulrich Drepper.
1209 * The nothrow function attribute is used when headers are used by gcc when
1210 compiling C code. This can avoid significant amounts of exception
1213 * The malloc functions perform more error checking and are stricter when
1214 it comes to reacting on errors. The default action is to terminate
1215 the process after showing an error message. Implemented by Ulrich Drepper.
1217 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1218 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1220 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1221 namespaces using the new function dlmopen(). This feature is of course,
1222 like most other dynamic loading functionality, not available in statically
1223 linked applications. Implemented by Ulrich Drepper.
1225 * Low-overhead boundary checking variants of string and some stdio functions
1226 were added. These are to be used in conjunction with a gcc patch by
1227 Jakub Jelinek which adds calls to these functions if possible.
1228 Implemented by Jakub Jelinek and Ulrich Drepper.
1230 * Old code for several operating systems and machine architectures that
1231 have not been in working condition in a long time have been removed from
1232 the main source tree maintained by the GNU C Library's maintainers.
1233 These files are now reside in the separate `ports' source module
1234 that is usable as an add-on when building the library.
1238 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1239 interrogate the dynamic linker, compatible with the Solaris interface.
1241 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1242 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1244 * getifaddrs now uses the netlink interface on Linux to get its information.
1245 Implemented by Thorsten Kukuk.
1247 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1248 Implemented by Ulrich Drepper.
1250 * support for non-executable stacks on x86 has been added. Changes mostly
1253 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1256 * getaddrinfo now performs destination address selection according to
1261 * Thread-safe interfaces for many functions that access locale data
1262 were added in version 2.3, but these features were omitted from NEWS.
1263 Many functions have variants with an `_l' suffix that take a `locale_t'
1264 object as a parameter rather than consulting the current locale.
1265 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1266 create and maintain `locale_t' objects. Additionally, the new function
1267 `uselocale' sets "the current locale" (as used by functions not so
1268 parameterized) set for an individual thread. These features were added
1269 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1271 * The functions getresuid, getresgid, setresuid, and setresgid, which
1272 have long been available on Linux, are now declared in <unistd.h>
1273 and are now also available on the Hurd.
1275 * ELF thread-local storage support (TLS) now works on x86-64.
1277 * The new dynamic string token $LIB is expanded in shared library names.
1278 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1280 * Aldy Hernandez contributed complete software floating point support for
1281 PowerPC machines with no FPU.
1283 * fexecve is implemented on Linux.
1285 * The `btowc' function should work at least twice as fast due to
1286 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1288 * With approriate thread add-ons cancelable functions are now implemented
1289 in libc.so as well. No need to call the function in libpthread. This
1290 change allowed to finally disable the incorrect and expensive handling
1291 of weak definition in ld.so.
1293 * Yet more PLT entries in libc.so have been removed. We finally arrived
1294 at the bare minimum. Startup times improved appropriately.
1296 * Support for the new Linux/x86 system call interface was added. The
1297 AT_SYSINFO auxiliary vector entry is recognized and handled.
1301 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1304 * iconv (the program and the interface) now accepts empty names (excluding
1305 options like //TRANSLIT) to mean "use charset of current locale".
1307 * localedef can now transliterate characters in strings which are not in
1308 the provided charmap. The information from the input locale is used.
1310 * Prelinking support was added for ELF targets. This requires additional
1311 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1313 * Read-only stdio streams now use mmap to speed up operation by eliminating
1314 copying and buffer underflows. To use add 'm' to the mode string of
1315 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1317 * The malloc functions were completely rewritten by Wolfram Gloger based
1318 on Doug Lea's malloc-2.7.0.c.
1320 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1321 implementation of regex.
1323 * Bruno Haible upgraded the iconv and locale implementation to support
1326 * Contents of the LC_* and LANG environment variables in the CEN style are
1327 not recognized anymore. It never was used. Change by Ulrich Drepper.
1329 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1330 thread-local storage (TLS) ABI on some platforms.
1331 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1333 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1334 EUC-JISX0213, and TSCII.
1336 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1337 BSD-compatible interface for getting all network interface addresses.
1338 Implementation for IPv4 by Roland McGrath.
1340 * Loading of locale data is faster due to the introduction of a locale
1341 archive. Implemented by Roland McGrath and Ulrich Drepper.
1343 * Startup times are significantly reduced by not using exported functions
1344 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1347 * Steven Munroe contributed a port to PowerPC64/Linux.
1351 * The Hurd now uses the GNU libio implementation of stdio rather than the
1352 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1354 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1355 with the same behavior as the Linux system call of the same name.
1359 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1360 128-bit long double format.
1362 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1363 IBM1161, and IBM1162 charsets.
1365 * Andreas Jaeger contributed a port to x86-64/Linux.
1367 * Peter Bruin contributed a port to PowerPC/Hurd.
1369 * libc functions using I/O streams now can handle wide-oriented streams
1372 * optimizations in the dynamic linker. Binaries created by recent binutils
1373 versions start up quicker due to reduced time spent on relocations.
1375 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1379 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1380 asinh, atanh, j0 for the 128-bit long double format.
1382 * Bruno Haible updated all the code handling Unicode in some form to
1383 support Unicode 3.1.
1385 * Speed of regex for single-byte locales is back to previous levels.
1386 Patch by Isamu Hasegawa.
1388 * Alpha, SPARC, and IA-64 now also using floating stacks.
1390 * Startup time of internationalized applications greatly improved through
1391 iconv cache. Use iconvconfig to generate the cache file.
1392 Contributed by Ulrich Drepper.
1394 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1395 severe performance problems. Patch by David Mosberger.
1397 * The Hurd port got a lot more functionality like AIO, various stdio
1398 extensions, etc. Mainly done by Roland McGrath.
1400 * mtrace can now lookup symbols in shared libraries.
1404 * Intel's IA-64 math library is largely integrated. It provides fast and
1405 accurate implementatations for most basic and standard math functions
1406 in float, double, and long double format.
1408 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1409 and asin for the 96-bit long double format and asin, log, tan for the
1410 128-bit long double format.
1412 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1413 The basic double functions exist today. Contributed by Abraham Ziv
1414 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1415 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1417 * An asynchronous name lookup library was added. The interface is designed
1418 after POSIX AIO. The proposal was circulated beforehand to get comments.
1419 No negative ones came in. Implemented by Ulrich Drepper.
1421 * Port to S390/64bit contributed by Martin Schwidefsky
1422 <schwidefsky@de.ibm.com>.
1424 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1425 of functions for Linux/IA-64.
1427 * The RPC code is now thread safe. Threads can now use the same service
1428 of different services at the same time. Patch by Eric Norum
1429 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1431 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1432 family of functions for Linux/S390.
1434 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1435 of functions for Linux/x86.
1437 * Port to Linux/CRIS contributed by Axis Communications.
1441 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1442 we can now check for namespace violations and missing declarations. The
1443 result is that almost all headers are now Unix-compliant (as defined in
1444 the upcoming XPG6). The negative side is that some programs might need
1445 corrections, too, if they depend on the incorrect form of the headers in
1446 previous versions which defined too many symbols and included too many
1449 * regex now handles multibyte character sets correctly.
1450 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1452 * iconv (the program) does now conform to the upcoming XPG6 and handles
1453 charmaps. Instead of the charset names the path of charmaps can be
1454 provided and the conversion happens based on this data.
1455 Contributed by Ulrich Drepper.
1457 * The locale program now provides detailed information about the installed
1462 only lists the names of the supported locales
1466 provides details such as country, language, and codeset name.
1467 Contributed by Ulrich Drepper.
1471 * The gencat program now parses the input file according to the charset
1472 selected by the LC_CTYPE category. This is important for stateful
1473 character sets. To make generating catalogs easier there is a way
1474 to overwrite the charset selected by the locale: before the first
1475 message or $ quote line the catalog can contain a line like
1477 $ codeset=ISO-8859-2
1479 to select the charset (ISO-8859-2 in this case).
1481 Implemented by Shinya Hanataka and Ulrich Drepper.
1483 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1484 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1485 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1487 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1488 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1490 * The LANGUAGE environment variable is now ignored unless the locale is
1491 changed from the default "C" locale.
1493 * The usual bug fixes.
1497 * Greg McGary added runtime support for bounds checking using gcc's
1498 new -fbounded-pointers option. ix86 target is complete. PowerPC
1501 * Thorsten Kukuk added secure mode support to nscd.
1503 * The Berkeley db libraries have been removed.
1505 Related, the nss_db module is now in a separate package since it
1506 obviously requires a database library being available.
1508 * Wide character I/O streams implemented by Ulrich Drepper.
1510 * Functions from the extended socket API added by Ulrich Drepper.
1512 * Functions feenableexcept and fedisableexcept to control the
1513 behaviour of individual exceptions have been added by Andreas Jaeger.
1515 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1517 * The resolver code has been updated from bind 8.2.3-T5B which supports
1518 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1521 This change could in some situations effect backward compatibility. Since
1522 now `_res' is a thread-local instead of a global variable, modifying it
1523 in one thread does not have any effect in other threads.
1525 The resolver library was also extended to allow IPv6 as the transport
1526 protocol for the requests. This work was done by Stig Venaas.
1528 * Compatibility code for K&R C compilers has been removed from the
1529 header files. A ISO C compiler is needed to use the library
1530 (conforming to either C89 or C99 standard).
1532 * Complete rewrite of the localedef program to support multibyte character
1533 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1534 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1535 Implemented by Ulrich Drepper.
1537 Bruno Haible significantly improved the generation and use of the data
1538 structures for the wide character tables.
1540 * Plural handling in gettext implemented by Ulrich Drepper.
1542 * The utmp daemon has been removed.
1544 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1546 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1549 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1551 * POSIX barriers implemented by Kaz Kylheku.
1553 * POSIX spawn function family implemented by Ulrich Drepper.
1555 * POSIX spinlocks are now available.
1557 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1559 * the configure option --enable-kernel=X.Y.Z allows to strip out
1560 compatibility for kernel versions before X.Y.Z. This is currently only
1561 implemented for Linux.
1563 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1564 field sin6_scope_id. This means that all programs using IPv6 should be
1565 recompiled. Don't expect binary compatibility with previous glibc
1568 * various conversion modules for IBM character sets contributed by
1571 * IA-64 port by Jes Sorensen and HJ Lu.
1585 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1587 * New xdr functions are added; some rpc functions are now 64bit clean.
1589 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1591 * Fixed known incompatibilities with glibc 2.0.
1593 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1595 * Optimized a number of functions (especially the ELF dynamic loader).
1597 * Update timezone data files.
1599 * lots of charmaps corrections
1601 * some new locale definitions and charmaps
1606 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1607 conform to POSIX member type requirements. Symbol versions have been
1608 adjusted as needed within the library, and for direct use by applications,
1609 but there is potential for problems if third-party libraries use
1610 struct timeval as part of their interface. This does not present
1611 a problem for X and other "essential" system libraries.
1613 * An additional locale model to support C++ Standard Library locale
1614 model and probably more was implemented by Ulrich Drepper.
1616 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1619 * Miles Bader provided the `argp' function family to support hierachical
1620 command line argument parsing, layered on top of getopt.
1622 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1624 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1627 * scanf recognizes the %a and %A format for scanning floating point numbers.
1629 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1630 information and interfaces for the available integer types.
1632 * about 130 new math functions were added to implement the ISO C9x math
1635 * the new header <complex.h> contains definitions of the complex math
1636 functions from ISO C 9X.
1638 * the new header <tgmath.h> defines generic macros to use complex or
1639 real valued functions.
1641 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1643 * Andreas Jaeger provided a test suite for the math library.
1645 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1647 * Ulrich Drepper added character set conversion functions (iconv).
1649 * Optimized string functions have been added.
1651 * The localedata addon is now part of glibc.
1653 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1655 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1656 daemon for NSS (nscd).
1658 Missing a better place here are some numbers on improvements. Under
1659 Linux 2.1.125 un-tar-ing the kernel sources takes
1663 using local files 12.19s 6.88s 22.91s
1665 using NIS 13.92s 8.91s 26.34s
1667 using NIS & nscd 10.37s 7.34s 25.30s
1669 using NIS+ 27.57s 30.37s 640.46s
1671 using NIS+ & nscd 10.25s 7.83s 26.51s
1673 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1675 Keep in mind that non-namelookup related operations dominate above times.
1676 It was just a common complain that using NIS+ unpacking the kernel is
1679 [1] The old nscd implementation is not available anymore since it was
1680 distributed with glibc up to version 2.0.98 and thus is now replaced.
1682 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1684 * Mark Kettenis provided a Hesiod NSS module.
1686 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1687 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1689 * rcmd can now handle netgroups (Dick Streefland).
1691 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1694 * Support for the IPv6 protocol has been added to the socket API, as per the
1695 latest draft standards.
1697 * Support for Linux 2.2 has been added.
1699 * Interface changes relative to the latest 2.0.x release:
1700 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1701 addseverity NEW: Unix98
1702 alphasort64 NEW: LFS
1703 argp_err_exit_status NEW: argp, GNU ext
1704 argp_error NEW: argp, GNU ext
1705 argp_failure NEW: argp, GNU ext
1706 argp_help NEW: argp, GNU ext
1707 argp_parse NEW: argp, GNU ext
1708 argp_program_bug_address NEW: argp, GNU ext
1709 argp_program_version NEW: argp, GNU ext
1710 argp_program_version_hook NEW: argp, GNU ext
1711 argp_state_help NEW: argp, GNU ext
1712 argp_usage NEW: argp, GNU ext
1713 authdes_create NEW: Secure RPC
1714 authdes_getucred NEW: Secure RPC
1715 authdes_pk_create NEW: Secure RPC
1716 backtrace NEW: GNU ext.
1717 backtrace_symbols NEW: GNU ext.
1718 backtrace_symbols_fd NEW: GNU ext.
1720 cacosf NEW: ISO C 9x
1721 cacosh NEW: ISO C 9x
1722 cacoshf NEW: ISO C 9x
1723 cacoshl NEW: ISO C 9x
1724 cacosl NEW: ISO C 9x
1731 casinf NEW: ISO C 9x
1732 casinh NEW: ISO C 9x
1733 casinhf NEW: ISO C 9x
1734 casinhl NEW: ISO C 9x
1735 casinl NEW: ISO C 9x
1737 catanf NEW: ISO C 9x
1738 catanh NEW: ISO C 9x
1739 catanhf NEW: ISO C 9x
1740 catanhl NEW: ISO C 9x
1741 catanl NEW: ISO C 9x
1742 cbc_crypt NEW: Secure RPC
1746 ccoshf NEW: ISO C 9x
1747 ccoshl NEW: ISO C 9x
1753 cimagf NEW: ISO C 9x
1754 cimagl NEW: ISO C 9x
1755 clearerr_locked REMOVED
1756 clntunix_create NEW: sunrpc ext
1758 clog10 NEW: ISO C 9x
1759 clog10f NEW: ISO C 9x
1760 clog10l NEW: ISO C 9x
1770 cprojf NEW: ISO C 9x
1771 cprojl NEW: ISO C 9x
1773 crealf NEW: ISO C 9x
1774 creall NEW: ISO C 9x
1779 csinhf NEW: ISO C 9x
1780 csinhl NEW: ISO C 9x
1783 csqrtf NEW: ISO C 9x
1784 csqrtl NEW: ISO C 9x
1788 ctanhf NEW: ISO C 9x
1789 ctanhl NEW: ISO C 9x
1791 des_setparity NEW: Secure RPC
1792 ecb_crypt NEW: Secure RPC
1793 endutxent NEW: Unix98
1795 exp10f NEW: ISO C 9x
1796 exp10l NEW: ISO C 9x
1800 fattach NEW: STREAMS
1801 fdetach NEW: STREAMS
1805 feclearexcept NEW: ISO C 9x
1806 fegetenv NEW: ISO C 9x
1807 fegetexceptflag NEW: ISO C 9x
1808 fegetround NEW: ISO C 9x
1809 feholdexcept NEW: ISO C 9x
1811 feraiseexcept NEW: ISO C 9x
1812 ferror_locked REMOVED
1813 fesetenv NEW: ISO C 9x
1814 fesetexceptflag NEW: ISO C 9x
1815 fesetround NEW: ISO C 9x
1816 fetestexcept NEW: ISO C 9x
1817 feupdateenv NEW: ISO C 9x
1818 fflush_locked REMOVED
1822 fgets_unlocked NEW: GNU ext.
1823 fileno_locked REMOVED
1835 fputc_locked REMOVED
1836 fputs_unlocked NEW: GNU ext.
1837 fread_unlocked NEW: GNU ext.
1842 fstatvfs NEW: Unix98
1846 ftruncate64 NEW: LFS
1848 fwrite_unlocked NEW: GNU ext.
1849 gai_strerror NEW: IPv6
1853 getchar_locked REMOVED
1855 getdate_err NEW: Unix98
1856 getdate_r NEW: GNU ext.
1858 getnameinfo NEW: IPv6
1859 getnetname NEW: Secure RPC
1860 getpmsg NEW: STREAMS
1861 getpt NEW: Unix98 PTY
1862 getrlimit64 NEW: LFS
1863 getutxent NEW: Unix98
1864 getutxid NEW: Unix98
1865 getutxline NEW: Unix98
1866 glob64 NEW: GNU ext.
1867 globfree64 NEW: GNU ext.
1868 gnu_get_libc_release NEW: GNU ext.
1869 gnu_get_libc_version NEW: GNU ext.
1870 grantpt NEW: Unix98 PTY
1871 host2netname NEW: Secure RPC
1873 iconv_close NEW: iconv
1874 iconv_open NEW: iconv
1875 if_freenameindex NEW: IPv6
1876 if_indextoname NEW: IPv6
1877 if_nameindex NEW: IPv6
1878 if_nametoindex NEW: IPv6
1879 in6addr_any NEW: IPv6
1880 in6addr_loopback NEW: IPv6
1881 inet6_isipv4mapped NEW: IPv6
1882 isastream NEW: STREAMS
1883 iswblank NEW: GNU ext.
1884 key_decryptsession NEW: Secure RPC
1885 key_decryptsession_pk NEW: Secure RPC
1886 key_encryptsession NEW: Secure RPC
1887 key_encryptsession_pk NEW: Secure RPC
1888 key_gendes NEW: Secure RPC
1889 key_get_conv NEW: Secure RPC
1890 key_secretkey_is_set NEW: Secure RPC
1891 key_setnet NEW: Secure RPC
1892 key_setsecret NEW: Secure RPC
1893 llrint NEW: ISO C 9x
1894 llrintf NEW: ISO C 9x
1895 llrintl NEW: ISO C 9x
1896 llround NEW: ISO C 9x
1897 llroundf NEW: ISO C 9x
1898 llroundl NEW: ISO C 9x
1903 lrintf NEW: ISO C 9x
1904 lrintl NEW: ISO C 9x
1905 lround NEW: ISO C 9x
1906 lroundf NEW: ISO C 9x
1907 lroundl NEW: ISO C 9x
1909 makecontext NEW: Unix98
1910 mempcpy NEW: GNU ext.
1913 modify_ldt NEW: kernel
1917 nearbyint NEW: ISO C 9x
1918 nearbyintf NEW: ISO C 9x
1919 nearbyintl NEW: ISO C 9x
1920 netname2host NEW: Secure RPC
1921 netname2user NEW: Secure RPC
1922 nexttoward NEW: ISO C 9x
1923 nexttowardf NEW: ISO C 9x
1924 nexttowardl NEW: ISO C 9x
1928 passwd2des NEW: Secure RPC
1930 pow10f NEW: GNU ext.
1931 pow10l NEW: GNU ext.
1934 printf_size NEW: GNU ext.
1935 printf_size_info NEW: GNU ext.
1936 profil_counter REMOVED
1937 pthread_mutexattr_getkind_np REPLACED
1938 pthread_mutexattr_setkind_np REPLACED
1939 ptsname NEW: Unix98 PTY
1940 ptsname_r NEW: Unix98 PTY
1942 putchar_locked REMOVED
1943 putgrent NEW: GNU ext.
1945 putpmsg NEW: STREAMS
1946 pututxline NEW: Unix98
1950 readdir64_r NEW: LFS
1951 remquo NEW: ISO C 9x
1952 remquof NEW: ISO C 9x
1953 remquol NEW: ISO C 9x
1955 roundf NEW: ISO C 9x
1956 roundl NEW: ISO C 9x
1958 scalbln NEW: ISO C 9x
1959 scalblnf NEW: ISO C 9x
1960 scalblnl NEW: ISO C 9x
1962 sendfile NEW: kernel
1963 setcontext NEW: Unix98
1964 setrlimit64 NEW: LFS
1965 setutxent NEW: Unix98
1967 sigignore NEW: Unix98
1968 sigqueue NEW: POSIX.1b
1969 sigrelse NEW: Unix98
1970 sigset NEW: POSIX.1b
1971 sigtimedwait NEW: POSIX.1b
1972 sigwaitinfo NEW: POSIX.1b
1973 sincos NEW: GNU ext.
1974 sincosf NEW: GNU ext.
1975 sincosl NEW: GNU ext.
1979 strcasestr NEW: GNU ext.
1980 strtoimax NEW: ISO C 9x
1981 strtoumax NEW: ISO C 9x
1982 strverscmp NEW: GNU ext.
1983 svcauthdes_stats NEW: Secure RPC
1984 svcunix_create NEW: sunrpc etx
1985 svcunixfd_create NEW: sunrpc ext
1986 swapcontext NEW: Unix98
1987 tcgetsid NEW: Unix98 PTY
1988 tdestroy NEW: GNU ext.
1989 tgamma NEW: ISO C 9x
1990 tgammaf NEW: ISO C 9x
1991 tgammal NEW: ISO C 9x
1995 truncf NEW: ISO C 9x
1996 truncl NEW: ISO C 9x
1998 unlockpt NEW: Unix98 PTY
1999 updwtmpx NEW: Unix98
2000 user2netname NEW: Secure RPC
2001 utmpxname NEW: Unix98
2002 versionsort NEW: GNU ext.
2003 versionsort64 NEW: GNU ext.
2005 wcscasecmp NEW: GNU ext.
2006 wcsncasecmp NEW: GNU ext.
2007 wcsnlen NEW: GNU ext.
2008 wcstoimax NEW: ISO C 9x
2009 wcstoll NEW: ISO C 9x
2010 wcstoull NEW: ISO C 9x
2011 wcstoumax NEW: ISO C 9x
2013 wordexp NEW: POSIX.2
2014 wordfree NEW: POSIX.2
2015 write_profiling REMOVED
2016 xdecrypt NEW: Secure RPC
2017 xdr_authdes_cred NEW: Secure RPC
2018 xdr_authdes_verf NEW: Secure RPC
2019 xdr_cryptkeyarg NEW: Secure RPC
2020 xdr_cryptkeyarg2 NEW: Secure RPC
2021 xdr_cryptkeyres NEW: Secure RPC
2022 xdr_getcredres NEW: Secure RPC
2023 xdr_key_netstarg NEW: Secure RPC
2024 xdr_key_netstres NEW: Secure RPC
2025 xdr_keybuf NEW: Secure RPC
2026 xdr_keystatus NEW: Secure RPC
2027 xdr_netnamestr NEW: Secure RPC
2028 xdr_sizeof NEW: Secure RPC
2029 xdr_unixcred NEW: sunrpc ext
2030 xencrypt NEW: Secure RPC
2031 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2042 * inet_ntoa is thread-safe
2044 * updwtmp is moved from libutil to libc
2046 * rewrite of cbrt function
2048 * update of timezone data
2062 * add atoll function
2064 * fix complex problems in Berkeley DB code
2066 * fix math functions
2070 * fixed lots of header problems (especially Linux/GNU specific)
2072 * dynamic loader preserves all registers
2074 * Roland McGrath provided support for handling of auxiliary objects in
2075 the ELF dynamic loader.
2077 * support for parallel builds is improved
2081 * GNU extensions are no longer declared by default. To enable them you
2082 must define the macro `_GNU_SOURCE' in your program or compile with
2085 * The library has changed from using GNU ld symbol aliases to using weak
2086 symbols where available. The ELF object file format supports weak
2087 symbols; GNU ld also supports weak symbols in the a.out format. (There
2088 is also now support for other GNU ld extensions in ELF. Use the
2089 `--with-elf' option to configure to indicate you have ELF, and
2090 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2091 of many files which contained only symbol aliases, reducing the size of
2092 the source and the compiled library; many other files were renamed to
2093 less cryptic names previously occupied by the symbol alias files.
2094 There is a new header file <elf.h> for programs which operate on
2095 files in the ELF format.
2097 * Converted to Autoconf version 2, so `configure' has more options.
2098 Run `configure --help' to see the details.
2100 * The library can now be configured to build profiling, highly-optimized
2101 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2102 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2103 `configure' enable building these extra libraries. The shared library is
2104 built by default when using both ELF and GNU ld. When shared libraries
2105 are enabled, the new library `-ldl' is available for arbitrary run-time
2106 loading of shared objects; its interface is defined in <dlfcn.h>. The
2107 new header file <link.h> gives access to the internals of the run-time
2108 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2109 application of same name on other systems and it provides information
2110 about dynamically linked binaries.
2112 * The C library now provides the run-time support code for profiling
2113 executables compiled with `-pg'. Programs can control the profiling code
2114 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2115 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2116 the support for this file format was contributed by David Mosberger-Tang.
2118 * The math code has been replaced with a math library based on fdlibm from
2119 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2120 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2121 functions. The math functions now reside in a separate library, so
2122 programs using them will need to use `-lm' their linking commands.
2124 * John C. Bowman contributed optimized ix87 assembler inline functions.
2126 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2127 mechanism similar to that found in Solaris 2. This is now used for the
2128 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2129 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2130 file controls what services are used for each individual database. This
2131 works by loading shared libraries with names specified in `nsswitch.conf',
2132 so service modules can be changed or added at any time without even
2133 relinking any program. Currently there are the file, db, and NIS based
2134 NSS services available.
2136 * The new functions `strtoq' and `strtouq' parse integer values from
2137 strings, like `strtol' and `strtoul', but they return `long long int' and
2138 `unsigned long long int' values, respectively (64-bit quantities).
2140 * The new functions `strtof' and `strtold' parse floating-point values from
2141 strings, like `strtod', but they return `float' and `long double' values,
2142 respectively (on some machines `double' and `long double' are the same).
2144 * Ulrich Drepper has contributed new implementations of the floating-point
2145 printing and reading code used in the `printf' family of functions and
2146 `strtod', `strtof', and `strtold'. These new functions are perfectly
2147 accurate, and much faster than the old ones.
2149 * The implementation of the POSIX locale model was completely rewritten by
2150 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2151 to compile the POSIX locale definition.
2153 * The former dummy implementations of the strcoll and strxfrm function are
2154 now replaced by fully functional code contributed by Ulrich Drepper. The
2155 collation information comes from the POSIX locale definitions.
2157 * The new header <langinfo.h> defines an interface for accessing
2158 various locale-dependent data (using the locale chosen with `setlocale').
2160 * Ulrich Drepper has contributed a new suite of functions for operation on
2161 wide-character and multibyte-character strings, in <wchar.h>;
2162 and classification and case conversion of wide characters, in <wctype.h>.
2163 These new functions are conforming to the ISO C, Amendement 1 specification.
2165 * There is now a second implementation of the standard I/O library available.
2166 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2167 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2169 * You can now use positional parameter specifications in format strings
2170 for the `printf' and `scanf' families of functions. For example,
2171 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2172 ``Number 6, Mr Jones''. This is mainly useful when providing different
2173 format strings for different languages, whose grammars may dictate
2174 different orderings of the values being printed. To support this
2175 feature, the interface for `register_printf_handler' has changed; see
2176 the header file <printf.h> for details.
2178 * The `printf' and `scanf' families of functions now understand a new
2179 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2180 to group numbers as indicated by the locale; for `scanf' and friends, this
2181 says to accept as valid only a number with all the proper grouping
2182 separators in the right places. In the default "C" locale, numbers are
2183 not grouped; but locales for specific countries will define the usual
2184 conventions (i.e. separate thousands with `,' in the US locale).
2186 * The pgrp functions have been regularized, slightly incompatibly but much
2187 less confusingly. The core functions are now `getpgid' and `setpgid',
2188 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2189 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2190 provided for compatibility. There is no longer an incompatible `getpgrp'
2191 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2193 * The new header file <fts.h> and suite of functions simplify programs that
2194 operate on directory trees. This code comes from 4.4 BSD.
2196 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2197 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2198 NSS scheme used in glibc.
2200 * There is a new malloc debugging hook `__memalign_hook'.
2202 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2203 `unsigned int' in <sys/types.h>. These are for compatibility only and
2204 their use is discouraged.
2206 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2207 done differently, so that it works even without GNU ld.
2209 * New function `euidaccess' checks allowed access to a file like `access',
2210 but using the effective IDs instead of the real IDs.
2212 * The time zone data files have been updated for the latest and greatest
2213 local time conventions of the countries of the world.
2215 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2218 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2219 for formatting floating-point numbers. They are provided only for
2220 compatibility; new programs should use `sprintf' instead. There are
2221 also equivalent function for the `long double' floating-point type and
2222 all functions also exist in a reentrant form.
2224 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2225 functions for maintaining the login-record files (primarily of use to
2226 system programs such as `login'), and convenient functions for
2227 allocating and initializing a pseudo-terminal (pty) device.
2229 * Ulrich Drepper has contributed new support for System V style
2230 shared memory and IPC on systems that support it.
2232 * Ulrich Drepper has contributed several miscellaneous new functions found
2233 in System V: The `hsearch' family of functions provide an effective
2234 implementation of hash tables; `a64l' and `l64a' provide a very simple
2235 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2238 * Ulrich Drepper has contributed new reentrant counterparts for the
2239 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2241 * Ulrich Drepper has contributed new, highly-optimized versions of several
2242 string functions for the i486/Pentium family of processors.
2244 * Ulrich Drepper has updated the Linux-specific code, based largely
2245 on work done in Hongjiu Lu's version of GNU libc for Linux.
2246 The GNU library now supports Linux versions 2.0.10 and later,
2247 using the ELF object file format (i[3456]86-*-linux).
2249 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2251 * David Mosberger-Tang and Richard Henderson have ported the C library
2252 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2253 dynamic linking support for ELF/Alpha.
2255 * Richard Henderson contributed several Alpha optimized assembler function
2256 for arithmetic and string handling.
2258 * Ulrich Drepper has contributed a new set of message catalog functions to
2259 support multiple languages using the <libintl.h> interface, for use with
2260 his new package GNU gettext. Translation volunteers have contributed
2261 catalogs of the library's messages in Spanish, German, and Korean.
2263 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2264 program and the `catgets' function for reading the catalog files it
2265 creates. (The <libintl.h> interface is preferred; we include the
2266 <nl_types.h> interface using `catgets' only for source compatibility with
2267 programs already written to use it.)
2269 * New header file <values.h> gives SVID-compatible names for <limits.h>
2272 * Various new macros, declarations, and small header files for compatibility
2275 * New function `group_member' is a convenient way to check if a process has
2276 a given effective group ID.
2278 * When using GCC 2.7 and later, the socket functions are now declared in a
2279 special way so that passing an argument of type `struct sockaddr_in *',
2280 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2281 `struct sockaddr *' type, does not generate a type-clash warning.
2283 * New function `error' declared in header file <error.h> is a convenient
2284 function for printing error messages and optionally exiting; this is the
2285 canonical function used in GNU programs. The new functions `err', `warn',
2286 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2287 doing the same thing.
2289 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2290 POSIX.2 `glob' function to do ~ and {...} expansion.
2292 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2293 `clearenv' which is used in POSIX.9 is also available.
2295 * New function `getsid' returns session ID number on systems that support it.
2297 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2298 files <db.h> and <mpool.h> provide a rich set of functions for several
2299 types of simple databases stored in memory and in files, and <ndbm.h> is
2300 an old `ndbm'-compatible interface using the `db' functions. Link with
2301 `-ldb' to get these functions.
2303 * New macro `strdupa' copies a string like `strdup', but uses local stack
2304 space from `alloca' instead of dynamic heap space from `malloc'.
2306 * New function `strnlen' is like `strlen' but searches only a given maximum
2307 number of characters for the null terminator. `stpncpy', `strndup' and
2308 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2311 * New function `statfs' in header <sys/statfs.h>.
2313 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2314 provide convenient functions for operating on blocks of null-terminated
2317 * A new suite of functions in <utmp.h> handle all the details of reading
2318 and writing the utmp file.
2320 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2323 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2324 completely POSIX compliant and also implemented the extended functionality
2325 to handle alternate digit representation and alternate era date formats.
2327 * Ulrich Drepper provided an implementation of the `strptime' function
2328 defined in XPG4.2 which transforms a string into a `struct tm' value.
2330 * Paul Eggert provided the tzselect shell script as part of the timezone
2331 code. The shell script makes it easy to select the correct timezone
2334 * The implementation of the malloc family of functions is completely replaced
2335 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2336 The implementation uses the mmap function (if available) and it is
2337 optimized for the use in multi threaded programs.
2339 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2340 functions. This new functionality is usable by specifying a special
2341 salt string and it is compatible with implementation on *BSD systems.
2343 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2344 `getsubopt' to handle second level command line options, `bsd_signal'
2345 to access BSD style `signal' functionality, the obsolete `regexp' style
2348 * the `lchown' function is available on system which support this
2351 * The implementation of the shadow password handling function was contributed
2354 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2356 * POSIX.1g support was added. The <sys/select.h> header is available,
2357 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2358 implementation of `getaddrinfo'.
2362 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2364 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2365 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2367 * The new function `daemon' from 4.4 BSD is useful for server programs that
2368 want to put themselves in the background.
2370 * Joel Sherrill has contributed support for several standalone boards that
2371 run without an operating system.
2373 * `printf', `scanf' and friends now accept a `q' type modifier for long
2374 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2376 * All of the code taken from BSD (notably most of the math and networking
2377 routines) has been updated from the BSD 4.4-Lite release.
2379 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2381 * The new functions `getdomainname' and `setdomainname' fetch or change the
2382 YP/NIS domain name. These are system calls which exist on systems which
2385 * The time zone data files have been updated for the latest international
2388 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2389 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2393 * The C library now includes support for Sun RPC, from Sun's free
2394 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2395 are included. (There is still no support for YP.)
2397 * Tom Quinn has contributed a port of the C library to SGI machines running
2398 Irix 4 (mips-sgi-irix4).
2400 * The new `lockf' function is a simplified interface to the locking
2401 facilities of `fcntl', included for compatibility.
2403 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2405 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2407 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2410 * The error message printed by `assert' for a failed assertion now includes
2411 the name of the program (if using GNU ld) and the name of the calling
2412 function (with versions of GCC that support this).
2414 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2416 * The library now includes the <sys/mman.h> header file and memory
2417 management functions `mmap', `munmap', `mprotect', `msync', and
2418 `madvise', on systems that support those facilities.
2420 * The interface for `mcheck' has changed slightly: the function called to
2421 abort the program when an allocation inconsistency is detected now takes
2422 an argument that indicates the type of failure. The new function
2423 `mprobe' lets you request a consistency check for a particular block at
2424 any time (checks are normally done only when you call `free' or `realloc'
2427 * It is now possible to easily cross-compile the C library, building on one
2428 system a library to run on another machine and/or operating system. All
2429 you need to do is set the variable `HOST_CC' in `configparms' to the
2430 native compiler for programs to run on the machine you are building on (a
2431 few generator programs are used on Unix systems); set `CC' to the
2434 * The new function `fexecve' (only implemented on the GNU system) executes
2435 a program file given a file descriptor already open on the file.
2439 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2440 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2442 * You can set the variable `libprefix' in `configparms' to specify a prefix
2443 to be prepended to installed library files; this makes it easy to install
2444 the GNU C library to be linked as `-lgnuc' or whatever.
2446 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2447 copies a limited number of characters from a string, and returns the
2448 address of the last character written.
2450 * You no longer need to check for whether the installed `stddef.h' is
2451 compatible with the GNU C library. configure now checks for you.
2453 * You can now define a per-stream `fileno' function to convert the
2454 stream's cookie into an integral file descriptor.
2456 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2457 allocates zero bytes of storage, and returns a unique pointer which
2458 you can pass to `realloc' or `free'. The behavior is undefined if
2459 you dereference this pointer.
2461 * The C library now runs on Sony NEWS m68k machines running either
2462 NewsOS 3 or NewsOS 4.
2464 * The new `syscall' function is a system-dependent primitive function
2465 for invoking system calls. It has the canonical behavior on Unix
2466 systems, including unreliable return values for some calls (such as
2467 `pipe', `fork' and `getppid').
2469 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2470 to `EAGAIN', which is the preferred name. On systems whose kernels
2471 use two distinct codes, the C library now translates EWOULDBLOCK to
2472 EAGAIN in every system call function.
2476 * The GNU C Library Reference Manual is now distributed with the library.
2477 `make dvi' will produce a DVI file of the printed manual.
2478 `make info' will produce Info files that you can read on line using C-h i
2479 in Emacs or the `info' program.
2480 Please send comments on the manual to bug-glibc-manual@gnu.org.
2482 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2484 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2486 * Jason Merrill has contributed a port to the Sequent Symmetry running
2487 Dynix version 3 (i386-sequent-dynix).
2489 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2490 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2492 * New function `memory_warnings' lets you arrange to get warnings when
2493 malloc is running out of memory to allocate, like Emacs gives you.
2495 * The C library now contains the relocating allocator used in Emacs 19 for
2496 its editing buffers. This allocator (ralloc) minimizes allocation
2497 overhead and fragmentation by moving allocated regions around whenever it
2498 needs to. You always refer to a ralloc'd region with a "handle" (a
2499 pointer to a pointer--an object of type `void **').
2501 * There is a new `printf' format: `%m' gives you the string corresponding
2502 to the error code in `errno'.
2504 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2505 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2506 pass, the `a' modifier says to fill in a `char **' you pass with a
2509 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2510 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2511 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2513 * `mkstemp' is a traditional Unix function to atomically create and open a
2514 uniquely-named temporary file.
2518 * The standard location for the file that says what the local timezone is
2519 has changed again. It is now `/usr/local/etc/localtime' (or more
2520 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2522 * The distribution no longer contains any files with names longer than 14
2525 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2526 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2528 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2532 * The configuration process has changed quite a bit. The `configure'
2533 script is now used just like the configuration scripts for other GNU
2534 packages. The `sysdeps' directory hierarchy is much rearranged.
2535 The file `INSTALL' explains the new scheme in detail.
2537 * The header files no longer need to be processed into ANSI C and
2538 traditional C versions. There is just one set of files to install, and
2539 it will work with ANSI or old C compilers (including `gcc -traditional').
2541 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2542 MIPS DECStation running Ultrix 4.
2544 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2545 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2546 made itself into a shared library.
2548 * Yet further improved support for the i386, running 4.3 BSD-like systems
2549 (such as Mach 3 with the Unix single-server), or System V.
2551 * New function `strncasecmp' to do case-insensitive string comparison
2552 with limited length.
2554 * New function `strsep' is a reentrant alternative to `strtok'.
2556 * New functions `scandir' and `alphasort' for searching directories.
2558 * New function `setenv' is a better interface to `putenv'.
2560 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2561 function for traversing a directory tree.
2563 * The GNU obstack package is now also part of the C library.
2564 The new function `open_obstack_stream' creates a stdio stream that
2565 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2566 formatted output directly to an obstack.
2568 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2569 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2571 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2573 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2574 things to your strings.
2576 * There are some new test programs: test-fseek, testmb, and testrand.
2578 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2579 These ports are not finished, but are a good starting place for really
2580 supporting those systems.
2582 * `/etc/localtime' is now the standard location for the file that says what
2583 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2584 This follows the general principle that `/etc' is the place for all local
2585 configuration files.
2587 * The C library header files now use `extern "C"' when used by the C++
2588 compiler, so the C library should now work with C++ code.
2590 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2591 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2594 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2595 function which uses the `merge sort' algorithm, and is said to be
2596 significantly faster than the old GNU `qsort' function. Merge sort is
2597 now the standard `qsort' function. The new algorithm can require a lot
2598 of temporary storage; so, the old sorting function is called when the
2599 required storage is not available.
2601 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2602 provides the Unix `crypt' function, plus some other entry points.
2604 * The code and header files taken from 4.4 BSD have been updated with the
2605 latest files released from Berkeley.
2607 ----------------------------------------------------------------------
2608 Copyright information:
2610 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2612 Permission is granted to anyone to make or distribute verbatim copies
2613 of this document as received, in any medium, provided that the
2614 copyright notice and this permission notice are preserved,
2615 thus giving the recipient permission to redistribute in turn.
2617 Permission is granted to distribute modified versions
2618 of this document, or of portions of it,
2619 under the above conditions, provided also that they
2620 carry prominent notices stating who last changed them.
2623 version-control: never