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 4719, 13064, 14094, 15319, 15467, 15790, 16560, 17269, 17569, 17588,
13 17792, 17836, 17912, 17932, 17944, 17949, 17964, 17965, 17967, 17969,
14 17978, 17987, 17991, 17996, 17998, 17999.
16 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
17 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
18 Hat). These updates cause user visible changes, such as the fix for bug
24 * The following bugs are resolved with this release:
26 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
27 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
28 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
29 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
30 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
31 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
32 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
33 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
34 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
35 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
38 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
39 too little memory for the to-be-scanned arguments and overflow the
40 allocated buffer. The implementation now correctly computes the required
41 buffer size when using malloc, and switches to malloc from alloca as
44 * A new semaphore algorithm has been implemented in generic C code for all
45 machines. Previous custom assembly implementations of semaphore were
46 difficult to reason about or ensure that they were safe. The new version
47 of semaphore supports machines with 64-bit or 32-bit atomic operations.
48 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
49 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
51 * Port to Altera Nios II has been contributed by Mentor Graphics.
53 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
54 implementations for powerpc64/powerpc64le.
55 Implemented by Adhemerval Zanella (IBM).
57 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
58 and powerpc64le. This may improve lock scaling of existing programs on
59 HTM capable systems. The lock elision code is only enabled with
60 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
61 powerpc will issue a transaction abort on every syscall to avoid side
62 effects being visible outside transactions.
64 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
65 AArch64. Contributed by ARM Ltd.
67 * i386 memcpy functions optimized with SSE2 unaligned load/store.
69 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
70 under certain input conditions resulting in the execution of a shell for
71 command substitution when the application did not request it. The
72 implementation now checks WRDE_NOCMD immediately before executing the
73 shell and returns the error WRDE_CMDSUB as expected.
75 * CVE-2012-3406 printf-style functions could run into a stack overflow when
76 processing format strings with a large number of format specifiers.
78 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
79 infinite loop if the DNS response contained a PTR record of an unexpected
82 * The minimum GCC version that can be used to build this version of the GNU
83 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
84 still be used to compile programs using the GNU C Library.
86 * The GNU C Library is now built with -Werror by default. This can be
87 disabled by configuring with --disable-werror.
89 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
91 * The obsolete sigvec function has been removed. This was the original
92 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
93 programs have been using instead for about 25 years. Of course, ABI
94 compatibility for old binaries using sigvec remains intact.
96 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
97 with newer versions of bison.
99 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
100 The original MIPS o32 hard-float ABI requires an FPU where double-precision
101 registers overlay two consecutive single-precision registers. MIPS32R2
102 introduced a new FPU mode (FR=1) where double-precision registers extend the
103 corresponding single-precision registers which is incompatible with the
104 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
105 require the use of FR=1 making a transition necessary. New o32 ABI
106 extensions enable users to migrate over time from the original o32 ABI
107 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
108 tracks the ABI of any loaded object and verifies that new objects are
109 compatible. Mode transitions will also be requested as required and
110 unsupportable objects will be rejected. The ABI checks include both soft and
111 hard float ABIs for o32, n32 and n64.
113 GCC 5 with GNU binutils 2.25 onwards:
114 It is strongly recommended that all o32 system libraries are built using the
115 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
116 with the original and all new o32 ABI extensions. Configure a MIPS GCC
117 compiler using --with-fp-32=xx to set this by default.
121 * The following bugs are resolved with this release:
123 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
124 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
125 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
126 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
127 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
128 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
129 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
130 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
131 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
132 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
133 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
134 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
135 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
136 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
137 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
139 * Reverted change of ABI data structures for s390 and s390x:
140 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
141 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
142 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
143 are preserved pointing straight to the same implementation as the old ones.
144 Given that, new callers will simply provide a too-big buffer to these
145 functions. Any applications/libraries out there that embed jmp_buf or
146 ucontext_t in an ABI-relevant data structure that have already been rebuilt
147 against 2.19 headers will have to rebuilt again. This is necessary in any
148 case to revert the breakage in their ABI caused by the glibc change.
150 * Support for file description locks is added to systems running the
151 Linux kernel. The standard file locking interfaces are extended to
152 operate on file descriptions, not file descriptors, via the use of
153 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
154 are associated with an open file instead of a process.
156 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
158 * The minimum Linux kernel version that this version of the GNU C Library
159 can be used with is 2.6.32.
161 * Running the testsuite no longer terminates as soon as a test fails.
162 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
163 with PASS or FAIL lines for individual tests. A summary of the results is
164 printed, including a list of failing lists, and "make check" exits with
165 error status if there were any unexpected failures. "make check
166 stop-on-test-failure=y" may be used to keep the old behavior.
168 * The am33 port, which had not worked for several years, has been removed
171 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
172 supported; they now act the same as _DEFAULT_SOURCE (but generate a
173 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
174 conflicted with POSIX (support for which was removed in 2.19), the
175 interfaces those macros enabled remain available when compiling with
176 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
179 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
181 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
182 This may improve lock scaling of existing programs on TX capable systems.
183 The lock elision code is only built with --enable-lock-elision=yes and
184 then requires a GCC version supporting the TX builtins. With lock elision
185 default mutexes are elided via __builtin_tbegin, if the cpu supports
186 transactions. By default lock elision is not enabled and the elision code
189 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
190 copy the path argument. This allowed programs to cause posix_spawn to
191 deference a dangling pointer, or use an unexpected pathname argument if
192 the string was modified after the posix_spawn_file_actions_addopen
195 * All supported architectures now use the main glibc sysdeps directory
196 instead of some being in a separate "ports" directory (which was
197 distributed separately before glibc 2.17).
199 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
200 On configurations that support it (all Linux configurations), it's now
201 used regardless of the --enable-add-ons switch to configure. It is no
202 longer possible to build such configurations without pthreads support.
204 * Locale names, including those obtained from environment variables (LANG
205 and the LC_* variables), are more tightly checked for proper syntax.
206 setlocale will now fail (with EINVAL) for locale names that are overly
207 long, contain slashes without starting with a slash, or contain ".." path
208 components. (CVE-2014-0475) Previously, some valid locale names were
209 silently replaced with the "C" locale when running in AT_SECURE mode
210 (e.g., in a SUID program). This is no longer necessary because of the
213 * On x86-64, the dynamic linker's lazy-binding support is now compatible
214 with application code using Intel MPX instructions. (With all previous
215 versions, the MPX register state could be clobbered when making calls
216 into or out of a shared library.) Note that while the new dynamic
217 linker is compatible with all known x86 hardware whether or not it
218 supports Intel MPX, some x86 instruction-set emulators might fail to
219 handle the new instruction encodings. This is known to affect Valgrind
220 versions up through 3.9 (but will be fixed in the forthcoming 3.10
221 release), and might affect other tools that do instruction emulation.
223 * Support for loadable gconv transliteration modules has been removed.
224 The support for transliteration modules has been non-functional for
225 over a decade, and the removal is prompted by security defects. The
226 normal gconv conversion modules are still supported. Transliteration
227 with //TRANSLIT is still possible, and the //IGNORE specifier
228 continues to be supported. (CVE-2014-5119)
230 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
231 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
232 resulting a denial-of-service security vulnerability in applications which
233 use functions related to iconv. (CVE-2014-6040)
237 * The following bugs are resolved with this release:
239 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
240 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
241 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
242 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
243 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
244 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
245 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
246 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
247 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
248 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
249 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
250 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
251 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
252 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
253 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
254 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
255 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
256 16431, 16453, 16474, 16506, 16510, 16529
258 * Slovenian translations for glibc messages have been contributed by the
259 Translation Project's Slovenian team of translators.
261 * The public headers no longer use __unused nor __block. This change is to
262 support compiling programs that are derived from BSD sources and use
263 __unused internally, and to support compiling with Clang's -fblock
264 extension which uses __block.
266 * CVE-2012-4412 The strcoll implementation caches indices and rules for
267 large collation sequences to optimize multiple passes. This cache
268 computation may overflow for large collation sequences and may cause a
269 stack or buffer overflow. This is now fixed to use a slower algorithm
270 which does not use a cache if there is an integer overflow.
272 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
273 rules for large collation sequences to optimize multiple passes and falls
274 back to alloca if malloc fails, resulting in a possible stack overflow.
275 The implementation now falls back to an uncached collation sequence lookup
278 * CVE-2013-4788 The pointer guard used for pointer mangling was not
279 initialized for static applications resulting in the security feature
280 being disabled. The pointer guard is now correctly initialized to a
281 random value for static applications. Existing static applications need
282 to be recompiled to take advantage of the fix (bug 15754).
284 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
285 to the d_name member of struct dirent, or omit the terminating NUL
286 character. (Bugzilla #14699).
288 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
289 aligned_alloc functions could allocate too few bytes or corrupt the
290 heap when passed very large allocation size values (Bugzilla #15855,
293 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
294 for AF_INET6 has been fixed (Bugzilla #16072).
296 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
297 pap_CW, quz_PE, the_NP.
299 * Substantially revised locales: gd_GB, ht_HT
301 * The LC_ADDRESS field was updated to support country_car for almost all
304 * ISO 1427 definitions were updated.
306 * ISO 3166 definitions were updated.
308 * The localedef utility now supports --big-endian and --little-endian
309 command-line options to generate locales for a different system from that
310 for which the C library was built.
312 * Binary locale files now only depend on the endianness of the system for
313 which they are generated and not on other properties of that system. As a
314 consequence, binary files generated with new localedef may be incompatible
315 with old versions of the GNU C Library, and binary files generated with
316 old localedef may be incompatible with this version of the GNU C Library,
317 in the following circumstances:
319 + Locale files may be incompatible on m68k systems.
321 + Locale archive files (but not separate files for individual locales) may
322 be incompatible on systems where plain "char" is signed.
324 * The configure option --disable-versioning has been removed. Builds with
325 --disable-versioning had not worked for several years.
327 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
328 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
330 * SystemTap probes for malloc have been introduced.
332 * SystemTap probes for slow multiple precision fallback paths of
333 transcendental functions have been introduced.
335 * Support for powerpc64le has been added.
337 * The soft-float powerpc port now supports e500 processors.
339 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
341 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
342 set of header declarations that are enabled by default, even when other
343 feature test macros or compiler options such as -std=c99 would otherwise
344 disable some of those declarations.
346 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
347 conflict with POSIX. The libbsd-compat library (which was a dummy library
348 that did nothing) has also been removed.
350 * Preliminary documentation about Multi-Thread, Async-Signal and
351 Async-Cancel Safety has been added.
353 * Change of ABI data structures for s390 and s390x:
354 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
355 allow for future hardware extensions. All library functions that accept or
356 return these structures were versioned in order to provide backwards
357 compatibility with existing code. However, not all cases can be handled
358 with interface versioning. If an application embeds either structure into
359 another structure and that structure is passed to another compilation unit
360 which expects the newer larger-sized object then any access to the new
361 fields will result in undefined behaviour. Similarly any access to fields
362 that were moved by the enlarging of the structures will cause undefined
363 behaviour. To fix the undefined behaviour all objects that are part of the
364 final in-memory image must agree on the size of structures, and this may
365 require recompilation.
369 * The following bugs are resolved with this release:
371 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
372 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
373 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
374 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
375 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
376 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
377 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
378 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
379 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
380 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
381 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
382 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
383 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
386 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
387 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
388 Distributions can re-enable building and using pt_chown via the new configure
389 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
390 considerable security risks and should only be used if the distribution
391 understands and accepts the risks.
393 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
396 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
397 fixed (Bugzilla #15330).
399 * Add support for calling C++11 thread_local object destructors on thread
400 and program exit. This needs compiler support for offloading C++11
401 destructor calls to glibc.
403 * Improved worst case performance of libm functions with double inputs and
406 * Support for priority inherited mutexes in pthread condition variables on
407 non-x86 architectures.
409 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
411 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
413 * Optimized string functions for ARM. Implemented by Will Newton and
416 * Optimized libm functions for SPARC. Implemented by David S. Miller.
418 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
421 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
422 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
424 * Added a benchmark framework to track performance of functions in glibc.
426 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
427 It is based on draft TS 18661 and currently enabled as a GNU extension.
429 * On Linux, the clock function now uses the clock_gettime system call
430 for improved precision, rather than old times system call.
432 * Added support for version-3 tz format files. This is needed when using
433 the tz database release 2013e or later, and affects a few unusual cases --
434 currently only TZ='America/Godthab' for time stamps after 2037.
436 * Added new API functions pthread_getattr_default_np and
437 pthread_setattr_default_np to get and set the default pthread
438 attributes of a process.
440 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
441 This may improve lock scaling of existing programs on TSX capable systems.
442 When the --enable-lock-elision=yes parameter is specified at configure
443 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
446 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
447 availability). Implemented by Ryan S. Arnold.
449 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
453 * The following bugs are resolved with this release:
455 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
456 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
457 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
458 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
459 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
460 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
461 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
462 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
463 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
464 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
465 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
466 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
467 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
468 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
469 14879, 14889, 14893, 14898, 14914.
471 * Optimization of memcpy for MIPS.
473 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
474 EMFILE has been fixed (Bugzilla #14889).
476 * The add-on ports collection is now distributed in the "ports" subdirectory
477 of the main GNU C Library distribution, rather than separately.
479 * Port to ARM AArch64 contributed by Linaro.
481 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
482 Optimized versions of memcpy, memset, and memcmp added for System z10 and
484 Implemented by Andreas Krebbel.
486 * The new function secure_getenv allows secure access to the environment,
487 returning NULL if running in a SUID/SGID process. This function replaces
488 the internal function __secure_getenv.
490 * SystemTap static probes have been added into the dynamic linker.
491 Implemented by Gary Benson.
493 * Optimizations of string functions strstr, strcasestr and memmem.
494 Implemented by Maxim Kuvyrkov.
496 * The minimum Linux kernel version that this version of the GNU C Library
497 can be used with is 2.6.16.
499 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
500 powerpc POWER7. Implemented by Will Schmidt.
502 * New configure option --disable-nscd builds the C library such that it
503 never attempts to contact the Name Service Caching Daemon (nscd).
504 New configure option --disable-build-nscd avoids building nscd itself;
505 this is the default if --disable-nscd is used.
507 * Improved support for cross-compilation, including cross-testing and
508 bootstrap builds without a previously built glibc.
510 * Several testsuite tests are now able to test multiple IFUNC variants of an
511 interface, rather than just testing the one that would be chooen by
514 * New configure options --with-bugurl and --with-pkgversion, for
515 distributors to use to embed their bug-reporting and package version
516 information in --help and --version output.
518 * The ttyname and ttyname_r functions on Linux now fall back to searching for
519 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
520 allows creation of chroots without the procfs mounted on /proc.
522 * The `crypt' function now fails if passed salt bytes that violate the
523 specification for those values. On Linux, the `crypt' function will
524 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
525 enabled, and fail on encrypted strings using the MD5 or DES algorithm
526 when the mode is enabled.
528 * The `clock_*' suite of functions (declared in <time.h>) is now available
529 directly in the main C library. Previously it was necessary to link with
530 -lrt to use these functions. This change has the effect that a
531 single-threaded program that uses a function such as `clock_gettime' (and
532 is not linked with -lrt) will no longer implicitly load the pthreads
533 library at runtime and so will not suffer the overheads associated with
534 multi-thread support in other code such as the C++ runtime library.
536 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
541 * The following bugs are resolved with this release:
543 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
544 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
545 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
546 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
547 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
548 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
549 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
550 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
551 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
552 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
553 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
554 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
555 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
556 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
557 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
558 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
559 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
560 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
561 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
562 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
563 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
564 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
567 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
568 configuring glibc with:
569 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
570 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
571 Implemented by H.J. Lu.
575 + define static_assert
577 + do not declare gets
579 + declare at_quick_exit and quick_exit also for ISO C11
581 + aligned_alloc. NB: The code is deliberately allows the size parameter
582 to not be a multiple of the alignment. This is a moronic requirement
583 in the standard but it is only a requirement on the caller, not the
588 + uchar.h support added
590 + CMPLX, CMPLXF, CMPLXL added
592 Implemented by Ulrich Drepper.
594 * Support for the IA-64 has been moved to ports.
596 * Remove support for anything but ELF binary format
598 * Checking versions of poll, ppoll added.
599 Implemented by Ulrich Drepper.
601 * More generic and 64-bit performance optimizations to math functions.
602 Implemented by Ulrich Drepper.
604 * New configure option --enable-obsolete-rpc makes the deprecated RPC
605 headers and functions available at compile time as they were before
606 version 2.14. This option will be removed at some time in the future
607 after the TI-RPC library becomes fully sufficient for the needs of
608 existing applications.
610 * Compatibility code for Linux kernel versions before 2.4 has been removed.
611 Note that glibc is not expected to work with any Linux kernel version
614 * New header <sys/auxv.h> and function getauxval allowing easy access to
615 the AT_* key-value pairs passed from the Linux kernel. The header also
616 defines the HWCAP_* bits associated with the AT_HWCAP key.
618 * New locales: mag_IN
620 * New configure option --enable-systemtap builds SystemTap static probes
621 into libc for setjmp and longjmp and into libpthread for various operations.
622 So far the setjmp/longjmp probes and some of the libpthread probes are
623 provided only for i*86 and x86_64.
624 Implemented by Roland McGrath and Rayson Ho.
626 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
628 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
631 * More optimized functions for SPARC. Implemented by David S. Miller.
633 * Improved support for cross-compilation, especially bootstrap builds
634 without a previously built glibc.
636 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
637 Chris Metcalf from Tilera.
639 * Support for the old ARM ABI has been removed from ports. Only the EABI is
640 now supported for ARM processors.
642 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
643 as the name of the dynamic linker, to distinguish it from the
644 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
646 * Support for CRIS has been removed from ports.
648 * A new class of installed header has been documented for low-level
649 platform-specific functionality. PowerPC added the first instance with a
650 function to provide time base register access. Contributed by Tulio
651 Magno Quites Machado Filho.
653 * ix86 configurations now install header files that are consistent with
654 what x86-64 configurations install. These same header files can be used
655 for -m32, -m64, or -mx32 builds.
656 Contributed by H.J. Lu.
658 * Math library bug fixes. A thorough audit of all open math library bugs was
659 conducted by Joseph Myers. Significant progress was made on many math
660 library bugs resulting in more accurate exceptions and function results.
661 Many thanks to all those that contributed including Andreas Jaeger for his
662 patch review and work on the x87 trigonometric instruction issues.
664 * Timezone data is no longer installed. Timezone-related binaries and scripts
665 will continue to be installed. Users should obtain their timezone data from
666 their distribution provider or from the tzdata package at
667 <ftp://munnari.oz.au/pub/>.
671 * The following bugs are resolved with this release:
673 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
674 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
675 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
676 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
677 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
678 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
679 13484, 13506, 13515, 13523, 13524, 13538, 13540
681 * New program pldd to list loaded object of a process
682 Implemented by Ulrich Drepper.
684 * Add nss_db support back to glibc. No more dependency on Berkeley db
685 and support for initgroups lookups.
686 Implemented by Ulrich Drepper.
688 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
689 Contributed by HJ Lu.
691 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
692 Contributed by HJ Lu.
694 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
695 on x86-32 and x86-64.
696 Contributed by Liubov Dmitrieva.
698 * Optimized strchr and strrchr for SSE on x86-32.
699 Contributed by Liubov Dmitrieva.
701 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
702 for x86-64 and x86-32.
703 Contributed by Liubov Dmitrieva.
705 * New interfaces: scandirat, scandirat64
706 Implemented by Ulrich Drepper.
708 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
709 Implemented by Ulrich Drepper.
711 * nscd now also caches the netgroup database.
712 Implemented by Ulrich Drepper.
714 * Integrate libm with gcc's -ffinite-math-only option.
715 Implemented by Ulrich Drepper.
717 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
718 to math functions. Implemented by Ulrich Drepper.
720 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
721 Implemented by Ulrich Drepper.
723 * New Linux interfaces: process_vm_readv, process_vm_writev
725 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
726 Implemented by Ulrich Drepper.
728 * Optimized nearbyint and strcasecmp for PPC.
729 Implemented by Adhemerval Zanella.
731 * New locales: bho_IN, unm_US, es_CU, ta_LK
735 * The following bugs are resolved with this release:
737 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
738 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
739 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
740 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
741 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
742 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
743 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
744 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
745 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
746 12795, 12811, 12813, 12814, 12841
748 * The RPC implementation in libc is obsoleted. Old programs keep working
749 but new programs cannot be linked with the routines in libc anymore.
750 Programs in need of RPC functionality must be linked against TI-RPC.
751 The TI-RPC implementation is IPv6 enabled and there are other benefits.
753 Visible changes of this change include (obviously) the inability to link
754 programs using RPC functions without referencing the TI-RPC library and the
755 removal of the RPC headers from the glibc headers.
756 Implemented by Ulrich Drepper.
758 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
759 syncfs, setns, sendmmsg
761 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
762 yue_HK, lij_IT, mhr_RU
764 * New encodings: CP770, CP771, CP772, CP773, CP774
766 * New program sotruss to trace calls through PLTs
767 Implemented by Ulrich Drepper.
769 * The malloc hook implementation is marked deprecated and will be removed
770 from the default implementation in the next version. The design never
771 worked ever since the introduction of threads. Even programs which do
772 not create threads themselves can use multiple threads created internally.
776 * The following bugs are resolved with this release:
778 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
779 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
780 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
781 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
784 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
786 * POWER7 optimizations: memset, memcmp, strncmp
788 * New optimized string functions for x86-64: strnlen (SSE2),
789 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
790 Implemented by Ulrich Drepper.
794 * The following bugs are resolved with this release:
796 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
797 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
798 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
799 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
800 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
801 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
802 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
803 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
805 * New interfaces: pthread_getname_np, pthread_setname_np
807 * New Linux interface: recvmmsg
809 * STT_GNU_IFUNC implemented for Sparc by David Miller.
811 * The dynamic linker now recognizes supported ABI versions from the
812 EI_ABIVERSION field in the ELF header.
813 Implemented by Ulrich Drepper.
815 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
816 will not be used to fill in password fields in the passwd.byname replies.
817 Instead it is used to synthesize the shadow.byname table, should it be
818 missing. This is a useful mode in some installations involving Solaris.
819 Implemented by Ulrich Drepper.
821 * New locales: kok_IN, sq_MK, cv_RU
825 * The following bugs are resolved with this release:
827 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
828 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
829 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
830 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
831 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
832 10789, 10817, 10823, 10840, 10847
834 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
836 Implemented by Ulrich Drepper.
838 * Checking version of longjmp added that fails if an uninitialized stack
839 frame would be created. Implemented by Ulrich Drepper.
841 * STT_GNU_IFUNC is now supported in static executables.
842 Implemented by H.J. Lu.
844 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
846 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
847 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
848 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
849 Contributed by H.J. Lu.
851 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
852 Implemented by Ulrich Drepper.
854 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
856 Contributed by H.J. Lu.
858 * Support for fma instruction in AVX on x86-64.
859 Implemented by H.J. Lu and Ulrich Drepper.
861 * AVX support in x86-64 auditing support in ld.so.
862 Implemented by H.J. Lu.
864 * STB_GNU_UNIQUE support added.
865 Implemented by Ulrich Drepper.
867 * Implement second fallback mode for optimized DNS lookup for even more
868 broken environments. If two requests from the same port are not
869 handled correctly close the socket and open a new one before sending
870 the second request. The 'single-request-reopen' option in /etc/resolv.conf
871 can be used to select this mode right away, instead of rediscovering the
872 necessity is every process again.
873 Implemented by Ulrich Drepper.
875 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
876 Implemented by Adam Tkac.
878 * Optimized iconv conversions for S390x.
879 Implemented by Andreas Krebbel.
881 * Using condvars with PI mutexes is now more efficient due to kernel
882 support for requeueing to PI futexes. NPTL support added for x86-64.
883 Implemented by Ulrich Drepper.
885 * New locales: ps_AF, my_MM
889 * The following bugs are resolved with this release:
891 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
892 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
893 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
894 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
895 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
897 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
898 Implemented by Ulrich Drepper.
900 * New Linux interfaces: accept4, fallocate, fallocate64.
901 Implemented by Ulrich Drepper.
903 * Correct declarations of string function when used in C++ code. This
904 could lead to compile errors for invalid C++ code.
906 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
909 * New POSIX 2008 interface: psiginfo
910 Implemented by Ulrich Drepper.
912 * New ISO C++1x interfaces: quick_exit, at_quick_exit
913 Implemented by Ulrich Drepper.
915 * Support for selecting between multiple function definitions at runtime
916 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
918 * The libcrypt library can now use the hash function implementations in
919 NSS. Implemented by Ulrich Drepper.
921 * The malloc implementation can be compiled to be less memory efficient
922 but higher performing in multi-threaded programs.
923 Implemented by Ulrich Drepper.
925 * New locales: nan_TW@latin, ks_IN
927 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
928 Implemented by Ulrich Drepper.
930 * Extended printf hook support. It is possible to use user-defined types
931 and extend existing format specifiers.
932 Implemented by Ulrich Drepper.
934 * Handling for group shadow files has been added.
935 Implemented by Ulrich Drepper.
937 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
938 servers (the case, e.g., for some people using the built-in DNS
939 server in ADSL modems/routers). There is a once-per-process timeout
940 in case of a broken server. To avoid it, users can run nscd or put
941 'options single-request' in /etc/resolv.conf.
942 Implemented by Ulrich Drepper.
946 * The following bugs are resolved with this release:
948 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
949 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
950 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
951 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
952 6968, 6974, 6980, 6995, 7008, 7009, 7029
954 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
955 up at the same time. Implemented by Ulrich Drepper.
957 * TLS descriptors for LD and GD on x86 and x86-64.
958 Implemented by Alexandre Oliva.
960 * getaddrinfo now handles DCCP and UDPlite.
961 Implemented by Ulrich Drepper.
963 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
964 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
965 Implemented by Ulrich Drepper.
967 * New implementation of memmem, strstr, and strcasestr which is O(n).
968 Implemented by Eric Blake.
970 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
972 * Implement "e" option for popen to open file descriptor with the
973 close-on-exec flag set. Implemented by Ulrich Drepper.
975 * Implement "b" mode for fmemopen. In this mode writes writes don't
976 implicitly add a NUL byte and seeks from the end of the buffer really
977 use the buffer end, not the string length as the basis.
978 Implemented by Ulrich Drepper.
980 * Many functions, exported and internal, now atomically set the close-on-exec
981 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
983 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
985 Implemented by Pravin Satpute.
987 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
991 * The following bugs are resolved with this release:
993 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
994 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
995 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
996 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
997 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
998 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
999 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1001 * New locales: bo_CN, bo_IN, shs_CA.
1003 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1005 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1006 Implemented by Pravin Satpute.
1008 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1010 * nscd caches now all timeouts for DNS entries
1011 Implemented by Ulrich Drepper.
1013 * nscd is more efficient and wakes up less often.
1014 Implemented by Ulrich Drepper.
1016 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1017 vdprintf, and obstack_vprintf.
1018 Implemented by Jakub Jelinek.
1020 * Faster memset for x86-64.
1021 Implemented by Harsha Jagasia and H.J. Lu.
1023 * Faster memcpy on x86.
1024 Implemented by Ulrich Drepper.
1026 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1027 Implemented by Ulrich Drepper.
1029 * Faster sqrt and sqrtf implemention for some PPC variants.
1030 Implemented by Steven Munroe.
1034 * The following bugs are resolved with this release:
1036 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1037 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1038 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1039 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1040 5071, 5103, 5104, 5112, 5113, 5184, 5186
1042 * More checking functions: fread, fread_unlocked, open*, mq_open.
1043 Implemented by Jakub Jelinek and Ulrich Drepper.
1045 * Extend fortification to C++. Implemented by Jakub Jelinek.
1047 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1048 by not recognizing 'a' as a modifier when those specs are requested.
1049 Implemented by Jakub Jelinek.
1051 * PPC optimizations to math and string functions.
1052 Implemented by Steven Munroe.
1054 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1055 options to be passed. Implemented by Ulrich Drepper.
1057 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1059 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1060 Implemented by Ulrich Drepper.
1062 * Handle private futexes in the NPTL implementation.
1063 Implemented by Jakub Jelinek and Ulrich Drepper.
1065 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1066 Implemented by Roland McGrath and Ulrich Drepper.
1068 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1070 * SHA-256 and SHA-512 based password encryption.
1071 Implemented by Ulrich Drepper.
1073 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1074 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1077 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1078 Implemented by Ulrich Drepper.
1082 * The following bugs are resolved with this release:
1084 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1085 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1086 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1087 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1088 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1089 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1090 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1093 * New Linux interfaces: epoll_pwait, sched_getcpu.
1095 * New generic interfaces: strerror_l.
1097 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1101 * The following bugs are resolved with this release:
1103 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1104 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1105 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1106 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1107 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1108 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1109 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1110 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1111 3225, 3251, 3252, 3253, 3273
1113 * For Linux, the sorting of addresses returned by getaddrinfo now also
1114 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1115 Implemented by Ulrich Drepper.
1117 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1118 Implemented by Ulrich Drepper.
1120 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1122 * New iconv module for MIK. Contributed by Alexander Shopov.
1124 * For sites with broken group and/or passwd database, the auto-propagate
1125 option of nscd can prevent creating ID lookup entries from the results
1126 of a name lookup and vice versa. This usually is no problem but some
1127 site might have problems with the default behavior.
1128 Implemented by Ulrich Drepper.
1130 * Iterating over entire database in NIS can be slow. With the
1131 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1132 to trade time for memory. The entire database will be read at once.
1133 Implemented by Ulrich Drepper.
1135 * The interfaces introduced in RFC 3542 have been implemented by
1138 * Support for the new ELF hash table format was added by Ulrich Drepper.
1140 * Support for priority inheritance mutexes added by Jakub Jelinek and
1143 * Support for priority protected mutexes added by Jakub Jelinek.
1145 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1146 or_IN, csb_PL, fy_NL, sr_ME.
1150 * More overflow detection functions.
1152 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1153 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1155 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1156 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1157 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1158 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1159 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1160 by Masahide Washizawa.
1162 * It is now possible to install audit libraries for the dynamic linker using
1163 LD_AUDIT. Implemented by Ulrich Drepper.
1165 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1166 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1167 For a libc and libpthread that works well on Linux 2.4 kernels, we
1168 recommend using the stable 2.3 branch.
1170 * The new function open_wmemstream acts like open_memstream,
1171 but uses a wchar_t wide character buffer.
1173 * The new function ppoll is an improved version of poll, similar to pselect.
1175 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1176 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1177 renameat, unlinkat, linkat, symlinkat, readlinkat.
1179 * New Linux kernel system calls: unshare,
1180 inotify_init, inotify_add_watch, inotify_rm_watch.
1182 * The euidaccess function is now also known by the alias eaccess,
1183 for compatibility with some other systems.
1185 * Timezone data updated to 2006b version.
1189 * The following bugs are resolved with this release:
1191 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1192 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1193 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1194 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1195 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1196 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1198 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1200 * As of this release, GCC 4 can be used to compile the C Library.
1202 * Timezone data updated to 2005m version.
1206 * The following bugs are resolved with this release:
1208 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1209 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1210 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1211 777, 787, 821, 822, 823, 825
1213 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1217 * Support for RFC 3678. Real implementations exist only for Linux so far.
1218 Implemented by Ulrich Drepper.
1220 * nscd can now cache entries persistently. Expiring entries are reloaded.
1221 For speedups the cache can be shared in memory with client processes.
1222 Implemented by Ulrich Drepper.
1224 * nscd can now perform SELinux checks.
1225 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1227 * getaddrinfo queries are now cached. Canonical name lookup is performed
1229 Implemented by Ulrich Drepper.
1231 * The nothrow function attribute is used when headers are used by gcc when
1232 compiling C code. This can avoid significant amounts of exception
1235 * The malloc functions perform more error checking and are stricter when
1236 it comes to reacting on errors. The default action is to terminate
1237 the process after showing an error message. Implemented by Ulrich Drepper.
1239 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1240 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1242 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1243 namespaces using the new function dlmopen(). This feature is of course,
1244 like most other dynamic loading functionality, not available in statically
1245 linked applications. Implemented by Ulrich Drepper.
1247 * Low-overhead boundary checking variants of string and some stdio functions
1248 were added. These are to be used in conjunction with a gcc patch by
1249 Jakub Jelinek which adds calls to these functions if possible.
1250 Implemented by Jakub Jelinek and Ulrich Drepper.
1252 * Old code for several operating systems and machine architectures that
1253 have not been in working condition in a long time have been removed from
1254 the main source tree maintained by the GNU C Library's maintainers.
1255 These files are now reside in the separate `ports' source module
1256 that is usable as an add-on when building the library.
1260 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1261 interrogate the dynamic linker, compatible with the Solaris interface.
1263 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1264 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1266 * getifaddrs now uses the netlink interface on Linux to get its information.
1267 Implemented by Thorsten Kukuk.
1269 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1270 Implemented by Ulrich Drepper.
1272 * support for non-executable stacks on x86 has been added. Changes mostly
1275 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1278 * getaddrinfo now performs destination address selection according to
1283 * Thread-safe interfaces for many functions that access locale data
1284 were added in version 2.3, but these features were omitted from NEWS.
1285 Many functions have variants with an `_l' suffix that take a `locale_t'
1286 object as a parameter rather than consulting the current locale.
1287 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1288 create and maintain `locale_t' objects. Additionally, the new function
1289 `uselocale' sets "the current locale" (as used by functions not so
1290 parameterized) set for an individual thread. These features were added
1291 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1293 * The functions getresuid, getresgid, setresuid, and setresgid, which
1294 have long been available on Linux, are now declared in <unistd.h>
1295 and are now also available on the Hurd.
1297 * ELF thread-local storage support (TLS) now works on x86-64.
1299 * The new dynamic string token $LIB is expanded in shared library names.
1300 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1302 * Aldy Hernandez contributed complete software floating point support for
1303 PowerPC machines with no FPU.
1305 * fexecve is implemented on Linux.
1307 * The `btowc' function should work at least twice as fast due to
1308 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1310 * With approriate thread add-ons cancelable functions are now implemented
1311 in libc.so as well. No need to call the function in libpthread. This
1312 change allowed to finally disable the incorrect and expensive handling
1313 of weak definition in ld.so.
1315 * Yet more PLT entries in libc.so have been removed. We finally arrived
1316 at the bare minimum. Startup times improved appropriately.
1318 * Support for the new Linux/x86 system call interface was added. The
1319 AT_SYSINFO auxiliary vector entry is recognized and handled.
1323 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1326 * iconv (the program and the interface) now accepts empty names (excluding
1327 options like //TRANSLIT) to mean "use charset of current locale".
1329 * localedef can now transliterate characters in strings which are not in
1330 the provided charmap. The information from the input locale is used.
1332 * Prelinking support was added for ELF targets. This requires additional
1333 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1335 * Read-only stdio streams now use mmap to speed up operation by eliminating
1336 copying and buffer underflows. To use add 'm' to the mode string of
1337 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1339 * The malloc functions were completely rewritten by Wolfram Gloger based
1340 on Doug Lea's malloc-2.7.0.c.
1342 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1343 implementation of regex.
1345 * Bruno Haible upgraded the iconv and locale implementation to support
1348 * Contents of the LC_* and LANG environment variables in the CEN style are
1349 not recognized anymore. It never was used. Change by Ulrich Drepper.
1351 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1352 thread-local storage (TLS) ABI on some platforms.
1353 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1355 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1356 EUC-JISX0213, and TSCII.
1358 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1359 BSD-compatible interface for getting all network interface addresses.
1360 Implementation for IPv4 by Roland McGrath.
1362 * Loading of locale data is faster due to the introduction of a locale
1363 archive. Implemented by Roland McGrath and Ulrich Drepper.
1365 * Startup times are significantly reduced by not using exported functions
1366 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1369 * Steven Munroe contributed a port to PowerPC64/Linux.
1373 * The Hurd now uses the GNU libio implementation of stdio rather than the
1374 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1376 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1377 with the same behavior as the Linux system call of the same name.
1381 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1382 128-bit long double format.
1384 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1385 IBM1161, and IBM1162 charsets.
1387 * Andreas Jaeger contributed a port to x86-64/Linux.
1389 * Peter Bruin contributed a port to PowerPC/Hurd.
1391 * libc functions using I/O streams now can handle wide-oriented streams
1394 * optimizations in the dynamic linker. Binaries created by recent binutils
1395 versions start up quicker due to reduced time spent on relocations.
1397 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1401 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1402 asinh, atanh, j0 for the 128-bit long double format.
1404 * Bruno Haible updated all the code handling Unicode in some form to
1405 support Unicode 3.1.
1407 * Speed of regex for single-byte locales is back to previous levels.
1408 Patch by Isamu Hasegawa.
1410 * Alpha, SPARC, and IA-64 now also using floating stacks.
1412 * Startup time of internationalized applications greatly improved through
1413 iconv cache. Use iconvconfig to generate the cache file.
1414 Contributed by Ulrich Drepper.
1416 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1417 severe performance problems. Patch by David Mosberger.
1419 * The Hurd port got a lot more functionality like AIO, various stdio
1420 extensions, etc. Mainly done by Roland McGrath.
1422 * mtrace can now lookup symbols in shared libraries.
1426 * Intel's IA-64 math library is largely integrated. It provides fast and
1427 accurate implementatations for most basic and standard math functions
1428 in float, double, and long double format.
1430 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1431 and asin for the 96-bit long double format and asin, log, tan for the
1432 128-bit long double format.
1434 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1435 The basic double functions exist today. Contributed by Abraham Ziv
1436 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1437 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1439 * An asynchronous name lookup library was added. The interface is designed
1440 after POSIX AIO. The proposal was circulated beforehand to get comments.
1441 No negative ones came in. Implemented by Ulrich Drepper.
1443 * Port to S390/64bit contributed by Martin Schwidefsky
1444 <schwidefsky@de.ibm.com>.
1446 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1447 of functions for Linux/IA-64.
1449 * The RPC code is now thread safe. Threads can now use the same service
1450 of different services at the same time. Patch by Eric Norum
1451 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1453 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1454 family of functions for Linux/S390.
1456 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1457 of functions for Linux/x86.
1459 * Port to Linux/CRIS contributed by Axis Communications.
1463 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1464 we can now check for namespace violations and missing declarations. The
1465 result is that almost all headers are now Unix-compliant (as defined in
1466 the upcoming XPG6). The negative side is that some programs might need
1467 corrections, too, if they depend on the incorrect form of the headers in
1468 previous versions which defined too many symbols and included too many
1471 * regex now handles multibyte character sets correctly.
1472 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1474 * iconv (the program) does now conform to the upcoming XPG6 and handles
1475 charmaps. Instead of the charset names the path of charmaps can be
1476 provided and the conversion happens based on this data.
1477 Contributed by Ulrich Drepper.
1479 * The locale program now provides detailed information about the installed
1484 only lists the names of the supported locales
1488 provides details such as country, language, and codeset name.
1489 Contributed by Ulrich Drepper.
1493 * The gencat program now parses the input file according to the charset
1494 selected by the LC_CTYPE category. This is important for stateful
1495 character sets. To make generating catalogs easier there is a way
1496 to overwrite the charset selected by the locale: before the first
1497 message or $ quote line the catalog can contain a line like
1499 $ codeset=ISO-8859-2
1501 to select the charset (ISO-8859-2 in this case).
1503 Implemented by Shinya Hanataka and Ulrich Drepper.
1505 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1506 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1507 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1509 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1510 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1512 * The LANGUAGE environment variable is now ignored unless the locale is
1513 changed from the default "C" locale.
1515 * The usual bug fixes.
1519 * Greg McGary added runtime support for bounds checking using gcc's
1520 new -fbounded-pointers option. ix86 target is complete. PowerPC
1523 * Thorsten Kukuk added secure mode support to nscd.
1525 * The Berkeley db libraries have been removed.
1527 Related, the nss_db module is now in a separate package since it
1528 obviously requires a database library being available.
1530 * Wide character I/O streams implemented by Ulrich Drepper.
1532 * Functions from the extended socket API added by Ulrich Drepper.
1534 * Functions feenableexcept and fedisableexcept to control the
1535 behaviour of individual exceptions have been added by Andreas Jaeger.
1537 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1539 * The resolver code has been updated from bind 8.2.3-T5B which supports
1540 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1543 This change could in some situations effect backward compatibility. Since
1544 now `_res' is a thread-local instead of a global variable, modifying it
1545 in one thread does not have any effect in other threads.
1547 The resolver library was also extended to allow IPv6 as the transport
1548 protocol for the requests. This work was done by Stig Venaas.
1550 * Compatibility code for K&R C compilers has been removed from the
1551 header files. A ISO C compiler is needed to use the library
1552 (conforming to either C89 or C99 standard).
1554 * Complete rewrite of the localedef program to support multibyte character
1555 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1556 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1557 Implemented by Ulrich Drepper.
1559 Bruno Haible significantly improved the generation and use of the data
1560 structures for the wide character tables.
1562 * Plural handling in gettext implemented by Ulrich Drepper.
1564 * The utmp daemon has been removed.
1566 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1568 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1571 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1573 * POSIX barriers implemented by Kaz Kylheku.
1575 * POSIX spawn function family implemented by Ulrich Drepper.
1577 * POSIX spinlocks are now available.
1579 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1581 * the configure option --enable-kernel=X.Y.Z allows to strip out
1582 compatibility for kernel versions before X.Y.Z. This is currently only
1583 implemented for Linux.
1585 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1586 field sin6_scope_id. This means that all programs using IPv6 should be
1587 recompiled. Don't expect binary compatibility with previous glibc
1590 * various conversion modules for IBM character sets contributed by
1593 * IA-64 port by Jes Sorensen and HJ Lu.
1607 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1609 * New xdr functions are added; some rpc functions are now 64bit clean.
1611 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1613 * Fixed known incompatibilities with glibc 2.0.
1615 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1617 * Optimized a number of functions (especially the ELF dynamic loader).
1619 * Update timezone data files.
1621 * lots of charmaps corrections
1623 * some new locale definitions and charmaps
1628 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1629 conform to POSIX member type requirements. Symbol versions have been
1630 adjusted as needed within the library, and for direct use by applications,
1631 but there is potential for problems if third-party libraries use
1632 struct timeval as part of their interface. This does not present
1633 a problem for X and other "essential" system libraries.
1635 * An additional locale model to support C++ Standard Library locale
1636 model and probably more was implemented by Ulrich Drepper.
1638 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1641 * Miles Bader provided the `argp' function family to support hierachical
1642 command line argument parsing, layered on top of getopt.
1644 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1646 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1649 * scanf recognizes the %a and %A format for scanning floating point numbers.
1651 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1652 information and interfaces for the available integer types.
1654 * about 130 new math functions were added to implement the ISO C9x math
1657 * the new header <complex.h> contains definitions of the complex math
1658 functions from ISO C 9X.
1660 * the new header <tgmath.h> defines generic macros to use complex or
1661 real valued functions.
1663 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1665 * Andreas Jaeger provided a test suite for the math library.
1667 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1669 * Ulrich Drepper added character set conversion functions (iconv).
1671 * Optimized string functions have been added.
1673 * The localedata addon is now part of glibc.
1675 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1677 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1678 daemon for NSS (nscd).
1680 Missing a better place here are some numbers on improvements. Under
1681 Linux 2.1.125 un-tar-ing the kernel sources takes
1685 using local files 12.19s 6.88s 22.91s
1687 using NIS 13.92s 8.91s 26.34s
1689 using NIS & nscd 10.37s 7.34s 25.30s
1691 using NIS+ 27.57s 30.37s 640.46s
1693 using NIS+ & nscd 10.25s 7.83s 26.51s
1695 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1697 Keep in mind that non-namelookup related operations dominate above times.
1698 It was just a common complain that using NIS+ unpacking the kernel is
1701 [1] The old nscd implementation is not available anymore since it was
1702 distributed with glibc up to version 2.0.98 and thus is now replaced.
1704 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1706 * Mark Kettenis provided a Hesiod NSS module.
1708 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1709 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1711 * rcmd can now handle netgroups (Dick Streefland).
1713 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1716 * Support for the IPv6 protocol has been added to the socket API, as per the
1717 latest draft standards.
1719 * Support for Linux 2.2 has been added.
1721 * Interface changes relative to the latest 2.0.x release:
1722 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1723 addseverity NEW: Unix98
1724 alphasort64 NEW: LFS
1725 argp_err_exit_status NEW: argp, GNU ext
1726 argp_error NEW: argp, GNU ext
1727 argp_failure NEW: argp, GNU ext
1728 argp_help NEW: argp, GNU ext
1729 argp_parse NEW: argp, GNU ext
1730 argp_program_bug_address NEW: argp, GNU ext
1731 argp_program_version NEW: argp, GNU ext
1732 argp_program_version_hook NEW: argp, GNU ext
1733 argp_state_help NEW: argp, GNU ext
1734 argp_usage NEW: argp, GNU ext
1735 authdes_create NEW: Secure RPC
1736 authdes_getucred NEW: Secure RPC
1737 authdes_pk_create NEW: Secure RPC
1738 backtrace NEW: GNU ext.
1739 backtrace_symbols NEW: GNU ext.
1740 backtrace_symbols_fd NEW: GNU ext.
1742 cacosf NEW: ISO C 9x
1743 cacosh NEW: ISO C 9x
1744 cacoshf NEW: ISO C 9x
1745 cacoshl NEW: ISO C 9x
1746 cacosl NEW: ISO C 9x
1753 casinf NEW: ISO C 9x
1754 casinh NEW: ISO C 9x
1755 casinhf NEW: ISO C 9x
1756 casinhl NEW: ISO C 9x
1757 casinl NEW: ISO C 9x
1759 catanf NEW: ISO C 9x
1760 catanh NEW: ISO C 9x
1761 catanhf NEW: ISO C 9x
1762 catanhl NEW: ISO C 9x
1763 catanl NEW: ISO C 9x
1764 cbc_crypt NEW: Secure RPC
1768 ccoshf NEW: ISO C 9x
1769 ccoshl NEW: ISO C 9x
1775 cimagf NEW: ISO C 9x
1776 cimagl NEW: ISO C 9x
1777 clearerr_locked REMOVED
1778 clntunix_create NEW: sunrpc ext
1780 clog10 NEW: ISO C 9x
1781 clog10f NEW: ISO C 9x
1782 clog10l NEW: ISO C 9x
1792 cprojf NEW: ISO C 9x
1793 cprojl NEW: ISO C 9x
1795 crealf NEW: ISO C 9x
1796 creall NEW: ISO C 9x
1801 csinhf NEW: ISO C 9x
1802 csinhl NEW: ISO C 9x
1805 csqrtf NEW: ISO C 9x
1806 csqrtl NEW: ISO C 9x
1810 ctanhf NEW: ISO C 9x
1811 ctanhl NEW: ISO C 9x
1813 des_setparity NEW: Secure RPC
1814 ecb_crypt NEW: Secure RPC
1815 endutxent NEW: Unix98
1817 exp10f NEW: ISO C 9x
1818 exp10l NEW: ISO C 9x
1822 fattach NEW: STREAMS
1823 fdetach NEW: STREAMS
1827 feclearexcept NEW: ISO C 9x
1828 fegetenv NEW: ISO C 9x
1829 fegetexceptflag NEW: ISO C 9x
1830 fegetround NEW: ISO C 9x
1831 feholdexcept NEW: ISO C 9x
1833 feraiseexcept NEW: ISO C 9x
1834 ferror_locked REMOVED
1835 fesetenv NEW: ISO C 9x
1836 fesetexceptflag NEW: ISO C 9x
1837 fesetround NEW: ISO C 9x
1838 fetestexcept NEW: ISO C 9x
1839 feupdateenv NEW: ISO C 9x
1840 fflush_locked REMOVED
1844 fgets_unlocked NEW: GNU ext.
1845 fileno_locked REMOVED
1857 fputc_locked REMOVED
1858 fputs_unlocked NEW: GNU ext.
1859 fread_unlocked NEW: GNU ext.
1864 fstatvfs NEW: Unix98
1868 ftruncate64 NEW: LFS
1870 fwrite_unlocked NEW: GNU ext.
1871 gai_strerror NEW: IPv6
1875 getchar_locked REMOVED
1877 getdate_err NEW: Unix98
1878 getdate_r NEW: GNU ext.
1880 getnameinfo NEW: IPv6
1881 getnetname NEW: Secure RPC
1882 getpmsg NEW: STREAMS
1883 getpt NEW: Unix98 PTY
1884 getrlimit64 NEW: LFS
1885 getutxent NEW: Unix98
1886 getutxid NEW: Unix98
1887 getutxline NEW: Unix98
1888 glob64 NEW: GNU ext.
1889 globfree64 NEW: GNU ext.
1890 gnu_get_libc_release NEW: GNU ext.
1891 gnu_get_libc_version NEW: GNU ext.
1892 grantpt NEW: Unix98 PTY
1893 host2netname NEW: Secure RPC
1895 iconv_close NEW: iconv
1896 iconv_open NEW: iconv
1897 if_freenameindex NEW: IPv6
1898 if_indextoname NEW: IPv6
1899 if_nameindex NEW: IPv6
1900 if_nametoindex NEW: IPv6
1901 in6addr_any NEW: IPv6
1902 in6addr_loopback NEW: IPv6
1903 inet6_isipv4mapped NEW: IPv6
1904 isastream NEW: STREAMS
1905 iswblank NEW: GNU ext.
1906 key_decryptsession NEW: Secure RPC
1907 key_decryptsession_pk NEW: Secure RPC
1908 key_encryptsession NEW: Secure RPC
1909 key_encryptsession_pk NEW: Secure RPC
1910 key_gendes NEW: Secure RPC
1911 key_get_conv NEW: Secure RPC
1912 key_secretkey_is_set NEW: Secure RPC
1913 key_setnet NEW: Secure RPC
1914 key_setsecret NEW: Secure RPC
1915 llrint NEW: ISO C 9x
1916 llrintf NEW: ISO C 9x
1917 llrintl NEW: ISO C 9x
1918 llround NEW: ISO C 9x
1919 llroundf NEW: ISO C 9x
1920 llroundl NEW: ISO C 9x
1925 lrintf NEW: ISO C 9x
1926 lrintl NEW: ISO C 9x
1927 lround NEW: ISO C 9x
1928 lroundf NEW: ISO C 9x
1929 lroundl NEW: ISO C 9x
1931 makecontext NEW: Unix98
1932 mempcpy NEW: GNU ext.
1935 modify_ldt NEW: kernel
1939 nearbyint NEW: ISO C 9x
1940 nearbyintf NEW: ISO C 9x
1941 nearbyintl NEW: ISO C 9x
1942 netname2host NEW: Secure RPC
1943 netname2user NEW: Secure RPC
1944 nexttoward NEW: ISO C 9x
1945 nexttowardf NEW: ISO C 9x
1946 nexttowardl NEW: ISO C 9x
1950 passwd2des NEW: Secure RPC
1952 pow10f NEW: GNU ext.
1953 pow10l NEW: GNU ext.
1956 printf_size NEW: GNU ext.
1957 printf_size_info NEW: GNU ext.
1958 profil_counter REMOVED
1959 pthread_mutexattr_getkind_np REPLACED
1960 pthread_mutexattr_setkind_np REPLACED
1961 ptsname NEW: Unix98 PTY
1962 ptsname_r NEW: Unix98 PTY
1964 putchar_locked REMOVED
1965 putgrent NEW: GNU ext.
1967 putpmsg NEW: STREAMS
1968 pututxline NEW: Unix98
1972 readdir64_r NEW: LFS
1973 remquo NEW: ISO C 9x
1974 remquof NEW: ISO C 9x
1975 remquol NEW: ISO C 9x
1977 roundf NEW: ISO C 9x
1978 roundl NEW: ISO C 9x
1980 scalbln NEW: ISO C 9x
1981 scalblnf NEW: ISO C 9x
1982 scalblnl NEW: ISO C 9x
1984 sendfile NEW: kernel
1985 setcontext NEW: Unix98
1986 setrlimit64 NEW: LFS
1987 setutxent NEW: Unix98
1989 sigignore NEW: Unix98
1990 sigqueue NEW: POSIX.1b
1991 sigrelse NEW: Unix98
1992 sigset NEW: POSIX.1b
1993 sigtimedwait NEW: POSIX.1b
1994 sigwaitinfo NEW: POSIX.1b
1995 sincos NEW: GNU ext.
1996 sincosf NEW: GNU ext.
1997 sincosl NEW: GNU ext.
2001 strcasestr NEW: GNU ext.
2002 strtoimax NEW: ISO C 9x
2003 strtoumax NEW: ISO C 9x
2004 strverscmp NEW: GNU ext.
2005 svcauthdes_stats NEW: Secure RPC
2006 svcunix_create NEW: sunrpc etx
2007 svcunixfd_create NEW: sunrpc ext
2008 swapcontext NEW: Unix98
2009 tcgetsid NEW: Unix98 PTY
2010 tdestroy NEW: GNU ext.
2011 tgamma NEW: ISO C 9x
2012 tgammaf NEW: ISO C 9x
2013 tgammal NEW: ISO C 9x
2017 truncf NEW: ISO C 9x
2018 truncl NEW: ISO C 9x
2020 unlockpt NEW: Unix98 PTY
2021 updwtmpx NEW: Unix98
2022 user2netname NEW: Secure RPC
2023 utmpxname NEW: Unix98
2024 versionsort NEW: GNU ext.
2025 versionsort64 NEW: GNU ext.
2027 wcscasecmp NEW: GNU ext.
2028 wcsncasecmp NEW: GNU ext.
2029 wcsnlen NEW: GNU ext.
2030 wcstoimax NEW: ISO C 9x
2031 wcstoll NEW: ISO C 9x
2032 wcstoull NEW: ISO C 9x
2033 wcstoumax NEW: ISO C 9x
2035 wordexp NEW: POSIX.2
2036 wordfree NEW: POSIX.2
2037 write_profiling REMOVED
2038 xdecrypt NEW: Secure RPC
2039 xdr_authdes_cred NEW: Secure RPC
2040 xdr_authdes_verf NEW: Secure RPC
2041 xdr_cryptkeyarg NEW: Secure RPC
2042 xdr_cryptkeyarg2 NEW: Secure RPC
2043 xdr_cryptkeyres NEW: Secure RPC
2044 xdr_getcredres NEW: Secure RPC
2045 xdr_key_netstarg NEW: Secure RPC
2046 xdr_key_netstres NEW: Secure RPC
2047 xdr_keybuf NEW: Secure RPC
2048 xdr_keystatus NEW: Secure RPC
2049 xdr_netnamestr NEW: Secure RPC
2050 xdr_sizeof NEW: Secure RPC
2051 xdr_unixcred NEW: sunrpc ext
2052 xencrypt NEW: Secure RPC
2053 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2064 * inet_ntoa is thread-safe
2066 * updwtmp is moved from libutil to libc
2068 * rewrite of cbrt function
2070 * update of timezone data
2084 * add atoll function
2086 * fix complex problems in Berkeley DB code
2088 * fix math functions
2092 * fixed lots of header problems (especially Linux/GNU specific)
2094 * dynamic loader preserves all registers
2096 * Roland McGrath provided support for handling of auxiliary objects in
2097 the ELF dynamic loader.
2099 * support for parallel builds is improved
2103 * GNU extensions are no longer declared by default. To enable them you
2104 must define the macro `_GNU_SOURCE' in your program or compile with
2107 * The library has changed from using GNU ld symbol aliases to using weak
2108 symbols where available. The ELF object file format supports weak
2109 symbols; GNU ld also supports weak symbols in the a.out format. (There
2110 is also now support for other GNU ld extensions in ELF. Use the
2111 `--with-elf' option to configure to indicate you have ELF, and
2112 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2113 of many files which contained only symbol aliases, reducing the size of
2114 the source and the compiled library; many other files were renamed to
2115 less cryptic names previously occupied by the symbol alias files.
2116 There is a new header file <elf.h> for programs which operate on
2117 files in the ELF format.
2119 * Converted to Autoconf version 2, so `configure' has more options.
2120 Run `configure --help' to see the details.
2122 * The library can now be configured to build profiling, highly-optimized
2123 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2124 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2125 `configure' enable building these extra libraries. The shared library is
2126 built by default when using both ELF and GNU ld. When shared libraries
2127 are enabled, the new library `-ldl' is available for arbitrary run-time
2128 loading of shared objects; its interface is defined in <dlfcn.h>. The
2129 new header file <link.h> gives access to the internals of the run-time
2130 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2131 application of same name on other systems and it provides information
2132 about dynamically linked binaries.
2134 * The C library now provides the run-time support code for profiling
2135 executables compiled with `-pg'. Programs can control the profiling code
2136 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2137 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2138 the support for this file format was contributed by David Mosberger-Tang.
2140 * The math code has been replaced with a math library based on fdlibm from
2141 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2142 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2143 functions. The math functions now reside in a separate library, so
2144 programs using them will need to use `-lm' their linking commands.
2146 * John C. Bowman contributed optimized ix87 assembler inline functions.
2148 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2149 mechanism similar to that found in Solaris 2. This is now used for the
2150 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2151 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2152 file controls what services are used for each individual database. This
2153 works by loading shared libraries with names specified in `nsswitch.conf',
2154 so service modules can be changed or added at any time without even
2155 relinking any program. Currently there are the file, db, and NIS based
2156 NSS services available.
2158 * The new functions `strtoq' and `strtouq' parse integer values from
2159 strings, like `strtol' and `strtoul', but they return `long long int' and
2160 `unsigned long long int' values, respectively (64-bit quantities).
2162 * The new functions `strtof' and `strtold' parse floating-point values from
2163 strings, like `strtod', but they return `float' and `long double' values,
2164 respectively (on some machines `double' and `long double' are the same).
2166 * Ulrich Drepper has contributed new implementations of the floating-point
2167 printing and reading code used in the `printf' family of functions and
2168 `strtod', `strtof', and `strtold'. These new functions are perfectly
2169 accurate, and much faster than the old ones.
2171 * The implementation of the POSIX locale model was completely rewritten by
2172 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2173 to compile the POSIX locale definition.
2175 * The former dummy implementations of the strcoll and strxfrm function are
2176 now replaced by fully functional code contributed by Ulrich Drepper. The
2177 collation information comes from the POSIX locale definitions.
2179 * The new header <langinfo.h> defines an interface for accessing
2180 various locale-dependent data (using the locale chosen with `setlocale').
2182 * Ulrich Drepper has contributed a new suite of functions for operation on
2183 wide-character and multibyte-character strings, in <wchar.h>;
2184 and classification and case conversion of wide characters, in <wctype.h>.
2185 These new functions are conforming to the ISO C, Amendement 1 specification.
2187 * There is now a second implementation of the standard I/O library available.
2188 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2189 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2191 * You can now use positional parameter specifications in format strings
2192 for the `printf' and `scanf' families of functions. For example,
2193 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2194 ``Number 6, Mr Jones''. This is mainly useful when providing different
2195 format strings for different languages, whose grammars may dictate
2196 different orderings of the values being printed. To support this
2197 feature, the interface for `register_printf_handler' has changed; see
2198 the header file <printf.h> for details.
2200 * The `printf' and `scanf' families of functions now understand a new
2201 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2202 to group numbers as indicated by the locale; for `scanf' and friends, this
2203 says to accept as valid only a number with all the proper grouping
2204 separators in the right places. In the default "C" locale, numbers are
2205 not grouped; but locales for specific countries will define the usual
2206 conventions (i.e. separate thousands with `,' in the US locale).
2208 * The pgrp functions have been regularized, slightly incompatibly but much
2209 less confusingly. The core functions are now `getpgid' and `setpgid',
2210 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2211 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2212 provided for compatibility. There is no longer an incompatible `getpgrp'
2213 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2215 * The new header file <fts.h> and suite of functions simplify programs that
2216 operate on directory trees. This code comes from 4.4 BSD.
2218 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2219 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2220 NSS scheme used in glibc.
2222 * There is a new malloc debugging hook `__memalign_hook'.
2224 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2225 `unsigned int' in <sys/types.h>. These are for compatibility only and
2226 their use is discouraged.
2228 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2229 done differently, so that it works even without GNU ld.
2231 * New function `euidaccess' checks allowed access to a file like `access',
2232 but using the effective IDs instead of the real IDs.
2234 * The time zone data files have been updated for the latest and greatest
2235 local time conventions of the countries of the world.
2237 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2240 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2241 for formatting floating-point numbers. They are provided only for
2242 compatibility; new programs should use `sprintf' instead. There are
2243 also equivalent function for the `long double' floating-point type and
2244 all functions also exist in a reentrant form.
2246 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2247 functions for maintaining the login-record files (primarily of use to
2248 system programs such as `login'), and convenient functions for
2249 allocating and initializing a pseudo-terminal (pty) device.
2251 * Ulrich Drepper has contributed new support for System V style
2252 shared memory and IPC on systems that support it.
2254 * Ulrich Drepper has contributed several miscellaneous new functions found
2255 in System V: The `hsearch' family of functions provide an effective
2256 implementation of hash tables; `a64l' and `l64a' provide a very simple
2257 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2260 * Ulrich Drepper has contributed new reentrant counterparts for the
2261 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2263 * Ulrich Drepper has contributed new, highly-optimized versions of several
2264 string functions for the i486/Pentium family of processors.
2266 * Ulrich Drepper has updated the Linux-specific code, based largely
2267 on work done in Hongjiu Lu's version of GNU libc for Linux.
2268 The GNU library now supports Linux versions 2.0.10 and later,
2269 using the ELF object file format (i[3456]86-*-linux).
2271 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2273 * David Mosberger-Tang and Richard Henderson have ported the C library
2274 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2275 dynamic linking support for ELF/Alpha.
2277 * Richard Henderson contributed several Alpha optimized assembler function
2278 for arithmetic and string handling.
2280 * Ulrich Drepper has contributed a new set of message catalog functions to
2281 support multiple languages using the <libintl.h> interface, for use with
2282 his new package GNU gettext. Translation volunteers have contributed
2283 catalogs of the library's messages in Spanish, German, and Korean.
2285 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2286 program and the `catgets' function for reading the catalog files it
2287 creates. (The <libintl.h> interface is preferred; we include the
2288 <nl_types.h> interface using `catgets' only for source compatibility with
2289 programs already written to use it.)
2291 * New header file <values.h> gives SVID-compatible names for <limits.h>
2294 * Various new macros, declarations, and small header files for compatibility
2297 * New function `group_member' is a convenient way to check if a process has
2298 a given effective group ID.
2300 * When using GCC 2.7 and later, the socket functions are now declared in a
2301 special way so that passing an argument of type `struct sockaddr_in *',
2302 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2303 `struct sockaddr *' type, does not generate a type-clash warning.
2305 * New function `error' declared in header file <error.h> is a convenient
2306 function for printing error messages and optionally exiting; this is the
2307 canonical function used in GNU programs. The new functions `err', `warn',
2308 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2309 doing the same thing.
2311 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2312 POSIX.2 `glob' function to do ~ and {...} expansion.
2314 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2315 `clearenv' which is used in POSIX.9 is also available.
2317 * New function `getsid' returns session ID number on systems that support it.
2319 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2320 files <db.h> and <mpool.h> provide a rich set of functions for several
2321 types of simple databases stored in memory and in files, and <ndbm.h> is
2322 an old `ndbm'-compatible interface using the `db' functions. Link with
2323 `-ldb' to get these functions.
2325 * New macro `strdupa' copies a string like `strdup', but uses local stack
2326 space from `alloca' instead of dynamic heap space from `malloc'.
2328 * New function `strnlen' is like `strlen' but searches only a given maximum
2329 number of characters for the null terminator. `stpncpy', `strndup' and
2330 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2333 * New function `statfs' in header <sys/statfs.h>.
2335 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2336 provide convenient functions for operating on blocks of null-terminated
2339 * A new suite of functions in <utmp.h> handle all the details of reading
2340 and writing the utmp file.
2342 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2345 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2346 completely POSIX compliant and also implemented the extended functionality
2347 to handle alternate digit representation and alternate era date formats.
2349 * Ulrich Drepper provided an implementation of the `strptime' function
2350 defined in XPG4.2 which transforms a string into a `struct tm' value.
2352 * Paul Eggert provided the tzselect shell script as part of the timezone
2353 code. The shell script makes it easy to select the correct timezone
2356 * The implementation of the malloc family of functions is completely replaced
2357 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2358 The implementation uses the mmap function (if available) and it is
2359 optimized for the use in multi threaded programs.
2361 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2362 functions. This new functionality is usable by specifying a special
2363 salt string and it is compatible with implementation on *BSD systems.
2365 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2366 `getsubopt' to handle second level command line options, `bsd_signal'
2367 to access BSD style `signal' functionality, the obsolete `regexp' style
2370 * the `lchown' function is available on system which support this
2373 * The implementation of the shadow password handling function was contributed
2376 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2378 * POSIX.1g support was added. The <sys/select.h> header is available,
2379 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2380 implementation of `getaddrinfo'.
2384 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2386 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2387 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2389 * The new function `daemon' from 4.4 BSD is useful for server programs that
2390 want to put themselves in the background.
2392 * Joel Sherrill has contributed support for several standalone boards that
2393 run without an operating system.
2395 * `printf', `scanf' and friends now accept a `q' type modifier for long
2396 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2398 * All of the code taken from BSD (notably most of the math and networking
2399 routines) has been updated from the BSD 4.4-Lite release.
2401 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2403 * The new functions `getdomainname' and `setdomainname' fetch or change the
2404 YP/NIS domain name. These are system calls which exist on systems which
2407 * The time zone data files have been updated for the latest international
2410 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2411 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2415 * The C library now includes support for Sun RPC, from Sun's free
2416 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2417 are included. (There is still no support for YP.)
2419 * Tom Quinn has contributed a port of the C library to SGI machines running
2420 Irix 4 (mips-sgi-irix4).
2422 * The new `lockf' function is a simplified interface to the locking
2423 facilities of `fcntl', included for compatibility.
2425 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2427 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2429 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2432 * The error message printed by `assert' for a failed assertion now includes
2433 the name of the program (if using GNU ld) and the name of the calling
2434 function (with versions of GCC that support this).
2436 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2438 * The library now includes the <sys/mman.h> header file and memory
2439 management functions `mmap', `munmap', `mprotect', `msync', and
2440 `madvise', on systems that support those facilities.
2442 * The interface for `mcheck' has changed slightly: the function called to
2443 abort the program when an allocation inconsistency is detected now takes
2444 an argument that indicates the type of failure. The new function
2445 `mprobe' lets you request a consistency check for a particular block at
2446 any time (checks are normally done only when you call `free' or `realloc'
2449 * It is now possible to easily cross-compile the C library, building on one
2450 system a library to run on another machine and/or operating system. All
2451 you need to do is set the variable `HOST_CC' in `configparms' to the
2452 native compiler for programs to run on the machine you are building on (a
2453 few generator programs are used on Unix systems); set `CC' to the
2456 * The new function `fexecve' (only implemented on the GNU system) executes
2457 a program file given a file descriptor already open on the file.
2461 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2462 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2464 * You can set the variable `libprefix' in `configparms' to specify a prefix
2465 to be prepended to installed library files; this makes it easy to install
2466 the GNU C library to be linked as `-lgnuc' or whatever.
2468 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2469 copies a limited number of characters from a string, and returns the
2470 address of the last character written.
2472 * You no longer need to check for whether the installed `stddef.h' is
2473 compatible with the GNU C library. configure now checks for you.
2475 * You can now define a per-stream `fileno' function to convert the
2476 stream's cookie into an integral file descriptor.
2478 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2479 allocates zero bytes of storage, and returns a unique pointer which
2480 you can pass to `realloc' or `free'. The behavior is undefined if
2481 you dereference this pointer.
2483 * The C library now runs on Sony NEWS m68k machines running either
2484 NewsOS 3 or NewsOS 4.
2486 * The new `syscall' function is a system-dependent primitive function
2487 for invoking system calls. It has the canonical behavior on Unix
2488 systems, including unreliable return values for some calls (such as
2489 `pipe', `fork' and `getppid').
2491 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2492 to `EAGAIN', which is the preferred name. On systems whose kernels
2493 use two distinct codes, the C library now translates EWOULDBLOCK to
2494 EAGAIN in every system call function.
2498 * The GNU C Library Reference Manual is now distributed with the library.
2499 `make dvi' will produce a DVI file of the printed manual.
2500 `make info' will produce Info files that you can read on line using C-h i
2501 in Emacs or the `info' program.
2502 Please send comments on the manual to bug-glibc-manual@gnu.org.
2504 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2506 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2508 * Jason Merrill has contributed a port to the Sequent Symmetry running
2509 Dynix version 3 (i386-sequent-dynix).
2511 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2512 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2514 * New function `memory_warnings' lets you arrange to get warnings when
2515 malloc is running out of memory to allocate, like Emacs gives you.
2517 * The C library now contains the relocating allocator used in Emacs 19 for
2518 its editing buffers. This allocator (ralloc) minimizes allocation
2519 overhead and fragmentation by moving allocated regions around whenever it
2520 needs to. You always refer to a ralloc'd region with a "handle" (a
2521 pointer to a pointer--an object of type `void **').
2523 * There is a new `printf' format: `%m' gives you the string corresponding
2524 to the error code in `errno'.
2526 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2527 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2528 pass, the `a' modifier says to fill in a `char **' you pass with a
2531 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2532 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2533 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2535 * `mkstemp' is a traditional Unix function to atomically create and open a
2536 uniquely-named temporary file.
2540 * The standard location for the file that says what the local timezone is
2541 has changed again. It is now `/usr/local/etc/localtime' (or more
2542 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2544 * The distribution no longer contains any files with names longer than 14
2547 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2548 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2550 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2554 * The configuration process has changed quite a bit. The `configure'
2555 script is now used just like the configuration scripts for other GNU
2556 packages. The `sysdeps' directory hierarchy is much rearranged.
2557 The file `INSTALL' explains the new scheme in detail.
2559 * The header files no longer need to be processed into ANSI C and
2560 traditional C versions. There is just one set of files to install, and
2561 it will work with ANSI or old C compilers (including `gcc -traditional').
2563 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2564 MIPS DECStation running Ultrix 4.
2566 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2567 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2568 made itself into a shared library.
2570 * Yet further improved support for the i386, running 4.3 BSD-like systems
2571 (such as Mach 3 with the Unix single-server), or System V.
2573 * New function `strncasecmp' to do case-insensitive string comparison
2574 with limited length.
2576 * New function `strsep' is a reentrant alternative to `strtok'.
2578 * New functions `scandir' and `alphasort' for searching directories.
2580 * New function `setenv' is a better interface to `putenv'.
2582 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2583 function for traversing a directory tree.
2585 * The GNU obstack package is now also part of the C library.
2586 The new function `open_obstack_stream' creates a stdio stream that
2587 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2588 formatted output directly to an obstack.
2590 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2591 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2593 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2595 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2596 things to your strings.
2598 * There are some new test programs: test-fseek, testmb, and testrand.
2600 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2601 These ports are not finished, but are a good starting place for really
2602 supporting those systems.
2604 * `/etc/localtime' is now the standard location for the file that says what
2605 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2606 This follows the general principle that `/etc' is the place for all local
2607 configuration files.
2609 * The C library header files now use `extern "C"' when used by the C++
2610 compiler, so the C library should now work with C++ code.
2612 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2613 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2616 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2617 function which uses the `merge sort' algorithm, and is said to be
2618 significantly faster than the old GNU `qsort' function. Merge sort is
2619 now the standard `qsort' function. The new algorithm can require a lot
2620 of temporary storage; so, the old sorting function is called when the
2621 required storage is not available.
2623 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2624 provides the Unix `crypt' function, plus some other entry points.
2626 * The code and header files taken from 4.4 BSD have been updated with the
2627 latest files released from Berkeley.
2629 ----------------------------------------------------------------------
2630 Copyright information:
2632 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2634 Permission is granted to anyone to make or distribute verbatim copies
2635 of this document as received, in any medium, provided that the
2636 copyright notice and this permission notice are preserved,
2637 thus giving the recipient permission to redistribute in turn.
2639 Permission is granted to distribute modified versions
2640 of this document, or of portions of it,
2641 under the above conditions, provided also that they
2642 carry prominent notices stating who last changed them.
2645 version-control: never