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, 14841, 14906, 15319, 15467, 15790, 15969, 16351,
13 16512, 16560, 16783, 17090, 17269, 17523, 17542, 17569, 17588, 17620,
14 17621, 17628, 17631, 17711, 17776, 17779, 17792, 17836, 17912, 17916,
15 17932, 17944, 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991,
16 17996, 17998, 17999, 18019, 18020, 18029, 18030, 18032, 18036, 18038,
17 18039, 18042, 18043, 18046, 18047, 18068, 18080, 18093, 18104, 18110,
20 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
21 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
22 Hat). These updates cause user visible changes, such as the fix for bug
28 * The following bugs are resolved with this release:
30 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
31 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
32 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
33 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
34 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
35 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
36 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
37 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
38 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
39 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
42 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
43 too little memory for the to-be-scanned arguments and overflow the
44 allocated buffer. The implementation now correctly computes the required
45 buffer size when using malloc, and switches to malloc from alloca as
48 * A new semaphore algorithm has been implemented in generic C code for all
49 machines. Previous custom assembly implementations of semaphore were
50 difficult to reason about or ensure that they were safe. The new version
51 of semaphore supports machines with 64-bit or 32-bit atomic operations.
52 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
53 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
55 * Port to Altera Nios II has been contributed by Mentor Graphics.
57 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
58 implementations for powerpc64/powerpc64le.
59 Implemented by Adhemerval Zanella (IBM).
61 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
62 and powerpc64le. This may improve lock scaling of existing programs on
63 HTM capable systems. The lock elision code is only enabled with
64 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
65 powerpc will issue a transaction abort on every syscall to avoid side
66 effects being visible outside transactions.
68 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
69 AArch64. Contributed by ARM Ltd.
71 * i386 memcpy functions optimized with SSE2 unaligned load/store.
73 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
74 under certain input conditions resulting in the execution of a shell for
75 command substitution when the application did not request it. The
76 implementation now checks WRDE_NOCMD immediately before executing the
77 shell and returns the error WRDE_CMDSUB as expected.
79 * CVE-2012-3406 printf-style functions could run into a stack overflow when
80 processing format strings with a large number of format specifiers.
82 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
83 infinite loop if the DNS response contained a PTR record of an unexpected
86 * The minimum GCC version that can be used to build this version of the GNU
87 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
88 still be used to compile programs using the GNU C Library.
90 * The GNU C Library is now built with -Werror by default. This can be
91 disabled by configuring with --disable-werror.
93 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
95 * The obsolete sigvec function has been removed. This was the original
96 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
97 programs have been using instead for about 25 years. Of course, ABI
98 compatibility for old binaries using sigvec remains intact.
100 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
101 with newer versions of bison.
103 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
104 The original MIPS o32 hard-float ABI requires an FPU where double-precision
105 registers overlay two consecutive single-precision registers. MIPS32R2
106 introduced a new FPU mode (FR=1) where double-precision registers extend the
107 corresponding single-precision registers which is incompatible with the
108 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
109 require the use of FR=1 making a transition necessary. New o32 ABI
110 extensions enable users to migrate over time from the original o32 ABI
111 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
112 tracks the ABI of any loaded object and verifies that new objects are
113 compatible. Mode transitions will also be requested as required and
114 unsupportable objects will be rejected. The ABI checks include both soft and
115 hard float ABIs for o32, n32 and n64.
117 GCC 5 with GNU binutils 2.25 onwards:
118 It is strongly recommended that all o32 system libraries are built using the
119 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
120 with the original and all new o32 ABI extensions. Configure a MIPS GCC
121 compiler using --with-fp-32=xx to set this by default.
125 * The following bugs are resolved with this release:
127 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
128 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
129 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
130 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
131 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
132 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
133 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
134 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
135 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
136 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
137 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
138 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
139 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
140 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
141 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
143 * Reverted change of ABI data structures for s390 and s390x:
144 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
145 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
146 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
147 are preserved pointing straight to the same implementation as the old ones.
148 Given that, new callers will simply provide a too-big buffer to these
149 functions. Any applications/libraries out there that embed jmp_buf or
150 ucontext_t in an ABI-relevant data structure that have already been rebuilt
151 against 2.19 headers will have to rebuilt again. This is necessary in any
152 case to revert the breakage in their ABI caused by the glibc change.
154 * Support for file description locks is added to systems running the
155 Linux kernel. The standard file locking interfaces are extended to
156 operate on file descriptions, not file descriptors, via the use of
157 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
158 are associated with an open file instead of a process.
160 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
162 * The minimum Linux kernel version that this version of the GNU C Library
163 can be used with is 2.6.32.
165 * Running the testsuite no longer terminates as soon as a test fails.
166 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
167 with PASS or FAIL lines for individual tests. A summary of the results is
168 printed, including a list of failing lists, and "make check" exits with
169 error status if there were any unexpected failures. "make check
170 stop-on-test-failure=y" may be used to keep the old behavior.
172 * The am33 port, which had not worked for several years, has been removed
175 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
176 supported; they now act the same as _DEFAULT_SOURCE (but generate a
177 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
178 conflicted with POSIX (support for which was removed in 2.19), the
179 interfaces those macros enabled remain available when compiling with
180 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
183 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
185 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
186 This may improve lock scaling of existing programs on TX capable systems.
187 The lock elision code is only built with --enable-lock-elision=yes and
188 then requires a GCC version supporting the TX builtins. With lock elision
189 default mutexes are elided via __builtin_tbegin, if the cpu supports
190 transactions. By default lock elision is not enabled and the elision code
193 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
194 copy the path argument. This allowed programs to cause posix_spawn to
195 deference a dangling pointer, or use an unexpected pathname argument if
196 the string was modified after the posix_spawn_file_actions_addopen
199 * All supported architectures now use the main glibc sysdeps directory
200 instead of some being in a separate "ports" directory (which was
201 distributed separately before glibc 2.17).
203 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
204 On configurations that support it (all Linux configurations), it's now
205 used regardless of the --enable-add-ons switch to configure. It is no
206 longer possible to build such configurations without pthreads support.
208 * Locale names, including those obtained from environment variables (LANG
209 and the LC_* variables), are more tightly checked for proper syntax.
210 setlocale will now fail (with EINVAL) for locale names that are overly
211 long, contain slashes without starting with a slash, or contain ".." path
212 components. (CVE-2014-0475) Previously, some valid locale names were
213 silently replaced with the "C" locale when running in AT_SECURE mode
214 (e.g., in a SUID program). This is no longer necessary because of the
217 * On x86-64, the dynamic linker's lazy-binding support is now compatible
218 with application code using Intel MPX instructions. (With all previous
219 versions, the MPX register state could be clobbered when making calls
220 into or out of a shared library.) Note that while the new dynamic
221 linker is compatible with all known x86 hardware whether or not it
222 supports Intel MPX, some x86 instruction-set emulators might fail to
223 handle the new instruction encodings. This is known to affect Valgrind
224 versions up through 3.9 (but will be fixed in the forthcoming 3.10
225 release), and might affect other tools that do instruction emulation.
227 * Support for loadable gconv transliteration modules has been removed.
228 The support for transliteration modules has been non-functional for
229 over a decade, and the removal is prompted by security defects. The
230 normal gconv conversion modules are still supported. Transliteration
231 with //TRANSLIT is still possible, and the //IGNORE specifier
232 continues to be supported. (CVE-2014-5119)
234 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
235 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
236 resulting a denial-of-service security vulnerability in applications which
237 use functions related to iconv. (CVE-2014-6040)
241 * The following bugs are resolved with this release:
243 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
244 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
245 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
246 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
247 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
248 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
249 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
250 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
251 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
252 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
253 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
254 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
255 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
256 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
257 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
258 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
259 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
260 16431, 16453, 16474, 16506, 16510, 16529
262 * Slovenian translations for glibc messages have been contributed by the
263 Translation Project's Slovenian team of translators.
265 * The public headers no longer use __unused nor __block. This change is to
266 support compiling programs that are derived from BSD sources and use
267 __unused internally, and to support compiling with Clang's -fblock
268 extension which uses __block.
270 * CVE-2012-4412 The strcoll implementation caches indices and rules for
271 large collation sequences to optimize multiple passes. This cache
272 computation may overflow for large collation sequences and may cause a
273 stack or buffer overflow. This is now fixed to use a slower algorithm
274 which does not use a cache if there is an integer overflow.
276 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
277 rules for large collation sequences to optimize multiple passes and falls
278 back to alloca if malloc fails, resulting in a possible stack overflow.
279 The implementation now falls back to an uncached collation sequence lookup
282 * CVE-2013-4788 The pointer guard used for pointer mangling was not
283 initialized for static applications resulting in the security feature
284 being disabled. The pointer guard is now correctly initialized to a
285 random value for static applications. Existing static applications need
286 to be recompiled to take advantage of the fix (bug 15754).
288 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
289 to the d_name member of struct dirent, or omit the terminating NUL
290 character. (Bugzilla #14699).
292 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
293 aligned_alloc functions could allocate too few bytes or corrupt the
294 heap when passed very large allocation size values (Bugzilla #15855,
297 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
298 for AF_INET6 has been fixed (Bugzilla #16072).
300 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
301 pap_CW, quz_PE, the_NP.
303 * Substantially revised locales: gd_GB, ht_HT
305 * The LC_ADDRESS field was updated to support country_car for almost all
308 * ISO 1427 definitions were updated.
310 * ISO 3166 definitions were updated.
312 * The localedef utility now supports --big-endian and --little-endian
313 command-line options to generate locales for a different system from that
314 for which the C library was built.
316 * Binary locale files now only depend on the endianness of the system for
317 which they are generated and not on other properties of that system. As a
318 consequence, binary files generated with new localedef may be incompatible
319 with old versions of the GNU C Library, and binary files generated with
320 old localedef may be incompatible with this version of the GNU C Library,
321 in the following circumstances:
323 + Locale files may be incompatible on m68k systems.
325 + Locale archive files (but not separate files for individual locales) may
326 be incompatible on systems where plain "char" is signed.
328 * The configure option --disable-versioning has been removed. Builds with
329 --disable-versioning had not worked for several years.
331 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
332 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
334 * SystemTap probes for malloc have been introduced.
336 * SystemTap probes for slow multiple precision fallback paths of
337 transcendental functions have been introduced.
339 * Support for powerpc64le has been added.
341 * The soft-float powerpc port now supports e500 processors.
343 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
345 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
346 set of header declarations that are enabled by default, even when other
347 feature test macros or compiler options such as -std=c99 would otherwise
348 disable some of those declarations.
350 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
351 conflict with POSIX. The libbsd-compat library (which was a dummy library
352 that did nothing) has also been removed.
354 * Preliminary documentation about Multi-Thread, Async-Signal and
355 Async-Cancel Safety has been added.
357 * Change of ABI data structures for s390 and s390x:
358 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
359 allow for future hardware extensions. All library functions that accept or
360 return these structures were versioned in order to provide backwards
361 compatibility with existing code. However, not all cases can be handled
362 with interface versioning. If an application embeds either structure into
363 another structure and that structure is passed to another compilation unit
364 which expects the newer larger-sized object then any access to the new
365 fields will result in undefined behaviour. Similarly any access to fields
366 that were moved by the enlarging of the structures will cause undefined
367 behaviour. To fix the undefined behaviour all objects that are part of the
368 final in-memory image must agree on the size of structures, and this may
369 require recompilation.
373 * The following bugs are resolved with this release:
375 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
376 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
377 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
378 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
379 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
380 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
381 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
382 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
383 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
384 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
385 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
386 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
387 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
390 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
391 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
392 Distributions can re-enable building and using pt_chown via the new configure
393 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
394 considerable security risks and should only be used if the distribution
395 understands and accepts the risks.
397 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
400 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
401 fixed (Bugzilla #15330).
403 * Add support for calling C++11 thread_local object destructors on thread
404 and program exit. This needs compiler support for offloading C++11
405 destructor calls to glibc.
407 * Improved worst case performance of libm functions with double inputs and
410 * Support for priority inherited mutexes in pthread condition variables on
411 non-x86 architectures.
413 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
415 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
417 * Optimized string functions for ARM. Implemented by Will Newton and
420 * Optimized libm functions for SPARC. Implemented by David S. Miller.
422 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
425 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
426 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
428 * Added a benchmark framework to track performance of functions in glibc.
430 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
431 It is based on draft TS 18661 and currently enabled as a GNU extension.
433 * On Linux, the clock function now uses the clock_gettime system call
434 for improved precision, rather than old times system call.
436 * Added support for version-3 tz format files. This is needed when using
437 the tz database release 2013e or later, and affects a few unusual cases --
438 currently only TZ='America/Godthab' for time stamps after 2037.
440 * Added new API functions pthread_getattr_default_np and
441 pthread_setattr_default_np to get and set the default pthread
442 attributes of a process.
444 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
445 This may improve lock scaling of existing programs on TSX capable systems.
446 When the --enable-lock-elision=yes parameter is specified at configure
447 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
450 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
451 availability). Implemented by Ryan S. Arnold.
453 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
457 * The following bugs are resolved with this release:
459 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
460 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
461 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
462 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
463 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
464 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
465 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
466 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
467 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
468 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
469 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
470 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
471 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
472 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
473 14879, 14889, 14893, 14898, 14914.
475 * Optimization of memcpy for MIPS.
477 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
478 EMFILE has been fixed (Bugzilla #14889).
480 * The add-on ports collection is now distributed in the "ports" subdirectory
481 of the main GNU C Library distribution, rather than separately.
483 * Port to ARM AArch64 contributed by Linaro.
485 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
486 Optimized versions of memcpy, memset, and memcmp added for System z10 and
488 Implemented by Andreas Krebbel.
490 * The new function secure_getenv allows secure access to the environment,
491 returning NULL if running in a SUID/SGID process. This function replaces
492 the internal function __secure_getenv.
494 * SystemTap static probes have been added into the dynamic linker.
495 Implemented by Gary Benson.
497 * Optimizations of string functions strstr, strcasestr and memmem.
498 Implemented by Maxim Kuvyrkov.
500 * The minimum Linux kernel version that this version of the GNU C Library
501 can be used with is 2.6.16.
503 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
504 powerpc POWER7. Implemented by Will Schmidt.
506 * New configure option --disable-nscd builds the C library such that it
507 never attempts to contact the Name Service Caching Daemon (nscd).
508 New configure option --disable-build-nscd avoids building nscd itself;
509 this is the default if --disable-nscd is used.
511 * Improved support for cross-compilation, including cross-testing and
512 bootstrap builds without a previously built glibc.
514 * Several testsuite tests are now able to test multiple IFUNC variants of an
515 interface, rather than just testing the one that would be chooen by
518 * New configure options --with-bugurl and --with-pkgversion, for
519 distributors to use to embed their bug-reporting and package version
520 information in --help and --version output.
522 * The ttyname and ttyname_r functions on Linux now fall back to searching for
523 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
524 allows creation of chroots without the procfs mounted on /proc.
526 * The `crypt' function now fails if passed salt bytes that violate the
527 specification for those values. On Linux, the `crypt' function will
528 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
529 enabled, and fail on encrypted strings using the MD5 or DES algorithm
530 when the mode is enabled.
532 * The `clock_*' suite of functions (declared in <time.h>) is now available
533 directly in the main C library. Previously it was necessary to link with
534 -lrt to use these functions. This change has the effect that a
535 single-threaded program that uses a function such as `clock_gettime' (and
536 is not linked with -lrt) will no longer implicitly load the pthreads
537 library at runtime and so will not suffer the overheads associated with
538 multi-thread support in other code such as the C++ runtime library.
540 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
545 * The following bugs are resolved with this release:
547 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
548 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
549 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
550 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
551 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
552 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
553 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
554 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
555 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
556 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
557 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
558 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
559 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
560 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
561 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
562 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
563 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
564 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
565 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
566 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
567 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
568 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
571 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
572 configuring glibc with:
573 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
574 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
575 Implemented by H.J. Lu.
579 + define static_assert
581 + do not declare gets
583 + declare at_quick_exit and quick_exit also for ISO C11
585 + aligned_alloc. NB: The code is deliberately allows the size parameter
586 to not be a multiple of the alignment. This is a moronic requirement
587 in the standard but it is only a requirement on the caller, not the
592 + uchar.h support added
594 + CMPLX, CMPLXF, CMPLXL added
596 Implemented by Ulrich Drepper.
598 * Support for the IA-64 has been moved to ports.
600 * Remove support for anything but ELF binary format
602 * Checking versions of poll, ppoll added.
603 Implemented by Ulrich Drepper.
605 * More generic and 64-bit performance optimizations to math functions.
606 Implemented by Ulrich Drepper.
608 * New configure option --enable-obsolete-rpc makes the deprecated RPC
609 headers and functions available at compile time as they were before
610 version 2.14. This option will be removed at some time in the future
611 after the TI-RPC library becomes fully sufficient for the needs of
612 existing applications.
614 * Compatibility code for Linux kernel versions before 2.4 has been removed.
615 Note that glibc is not expected to work with any Linux kernel version
618 * New header <sys/auxv.h> and function getauxval allowing easy access to
619 the AT_* key-value pairs passed from the Linux kernel. The header also
620 defines the HWCAP_* bits associated with the AT_HWCAP key.
622 * New locales: mag_IN
624 * New configure option --enable-systemtap builds SystemTap static probes
625 into libc for setjmp and longjmp and into libpthread for various operations.
626 So far the setjmp/longjmp probes and some of the libpthread probes are
627 provided only for i*86 and x86_64.
628 Implemented by Roland McGrath and Rayson Ho.
630 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
632 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
635 * More optimized functions for SPARC. Implemented by David S. Miller.
637 * Improved support for cross-compilation, especially bootstrap builds
638 without a previously built glibc.
640 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
641 Chris Metcalf from Tilera.
643 * Support for the old ARM ABI has been removed from ports. Only the EABI is
644 now supported for ARM processors.
646 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
647 as the name of the dynamic linker, to distinguish it from the
648 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
650 * Support for CRIS has been removed from ports.
652 * A new class of installed header has been documented for low-level
653 platform-specific functionality. PowerPC added the first instance with a
654 function to provide time base register access. Contributed by Tulio
655 Magno Quites Machado Filho.
657 * ix86 configurations now install header files that are consistent with
658 what x86-64 configurations install. These same header files can be used
659 for -m32, -m64, or -mx32 builds.
660 Contributed by H.J. Lu.
662 * Math library bug fixes. A thorough audit of all open math library bugs was
663 conducted by Joseph Myers. Significant progress was made on many math
664 library bugs resulting in more accurate exceptions and function results.
665 Many thanks to all those that contributed including Andreas Jaeger for his
666 patch review and work on the x87 trigonometric instruction issues.
668 * Timezone data is no longer installed. Timezone-related binaries and scripts
669 will continue to be installed. Users should obtain their timezone data from
670 their distribution provider or from the tzdata package at
671 <ftp://munnari.oz.au/pub/>.
675 * The following bugs are resolved with this release:
677 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
678 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
679 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
680 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
681 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
682 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
683 13484, 13506, 13515, 13523, 13524, 13538, 13540
685 * New program pldd to list loaded object of a process
686 Implemented by Ulrich Drepper.
688 * Add nss_db support back to glibc. No more dependency on Berkeley db
689 and support for initgroups lookups.
690 Implemented by Ulrich Drepper.
692 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
693 Contributed by HJ Lu.
695 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
696 Contributed by HJ Lu.
698 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
699 on x86-32 and x86-64.
700 Contributed by Liubov Dmitrieva.
702 * Optimized strchr and strrchr for SSE on x86-32.
703 Contributed by Liubov Dmitrieva.
705 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
706 for x86-64 and x86-32.
707 Contributed by Liubov Dmitrieva.
709 * New interfaces: scandirat, scandirat64
710 Implemented by Ulrich Drepper.
712 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
713 Implemented by Ulrich Drepper.
715 * nscd now also caches the netgroup database.
716 Implemented by Ulrich Drepper.
718 * Integrate libm with gcc's -ffinite-math-only option.
719 Implemented by Ulrich Drepper.
721 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
722 to math functions. Implemented by Ulrich Drepper.
724 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
725 Implemented by Ulrich Drepper.
727 * New Linux interfaces: process_vm_readv, process_vm_writev
729 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
730 Implemented by Ulrich Drepper.
732 * Optimized nearbyint and strcasecmp for PPC.
733 Implemented by Adhemerval Zanella.
735 * New locales: bho_IN, unm_US, es_CU, ta_LK
739 * The following bugs are resolved with this release:
741 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
742 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
743 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
744 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
745 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
746 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
747 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
748 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
749 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
750 12795, 12811, 12813, 12814, 12841
752 * The RPC implementation in libc is obsoleted. Old programs keep working
753 but new programs cannot be linked with the routines in libc anymore.
754 Programs in need of RPC functionality must be linked against TI-RPC.
755 The TI-RPC implementation is IPv6 enabled and there are other benefits.
757 Visible changes of this change include (obviously) the inability to link
758 programs using RPC functions without referencing the TI-RPC library and the
759 removal of the RPC headers from the glibc headers.
760 Implemented by Ulrich Drepper.
762 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
763 syncfs, setns, sendmmsg
765 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
766 yue_HK, lij_IT, mhr_RU
768 * New encodings: CP770, CP771, CP772, CP773, CP774
770 * New program sotruss to trace calls through PLTs
771 Implemented by Ulrich Drepper.
773 * The malloc hook implementation is marked deprecated and will be removed
774 from the default implementation in the next version. The design never
775 worked ever since the introduction of threads. Even programs which do
776 not create threads themselves can use multiple threads created internally.
780 * The following bugs are resolved with this release:
782 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
783 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
784 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
785 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
788 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
790 * POWER7 optimizations: memset, memcmp, strncmp
792 * New optimized string functions for x86-64: strnlen (SSE2),
793 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
794 Implemented by Ulrich Drepper.
798 * The following bugs are resolved with this release:
800 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
801 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
802 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
803 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
804 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
805 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
806 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
807 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
809 * New interfaces: pthread_getname_np, pthread_setname_np
811 * New Linux interface: recvmmsg
813 * STT_GNU_IFUNC implemented for Sparc by David Miller.
815 * The dynamic linker now recognizes supported ABI versions from the
816 EI_ABIVERSION field in the ELF header.
817 Implemented by Ulrich Drepper.
819 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
820 will not be used to fill in password fields in the passwd.byname replies.
821 Instead it is used to synthesize the shadow.byname table, should it be
822 missing. This is a useful mode in some installations involving Solaris.
823 Implemented by Ulrich Drepper.
825 * New locales: kok_IN, sq_MK, cv_RU
829 * The following bugs are resolved with this release:
831 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
832 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
833 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
834 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
835 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
836 10789, 10817, 10823, 10840, 10847
838 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
840 Implemented by Ulrich Drepper.
842 * Checking version of longjmp added that fails if an uninitialized stack
843 frame would be created. Implemented by Ulrich Drepper.
845 * STT_GNU_IFUNC is now supported in static executables.
846 Implemented by H.J. Lu.
848 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
850 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
851 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
852 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
853 Contributed by H.J. Lu.
855 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
856 Implemented by Ulrich Drepper.
858 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
860 Contributed by H.J. Lu.
862 * Support for fma instruction in AVX on x86-64.
863 Implemented by H.J. Lu and Ulrich Drepper.
865 * AVX support in x86-64 auditing support in ld.so.
866 Implemented by H.J. Lu.
868 * STB_GNU_UNIQUE support added.
869 Implemented by Ulrich Drepper.
871 * Implement second fallback mode for optimized DNS lookup for even more
872 broken environments. If two requests from the same port are not
873 handled correctly close the socket and open a new one before sending
874 the second request. The 'single-request-reopen' option in /etc/resolv.conf
875 can be used to select this mode right away, instead of rediscovering the
876 necessity is every process again.
877 Implemented by Ulrich Drepper.
879 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
880 Implemented by Adam Tkac.
882 * Optimized iconv conversions for S390x.
883 Implemented by Andreas Krebbel.
885 * Using condvars with PI mutexes is now more efficient due to kernel
886 support for requeueing to PI futexes. NPTL support added for x86-64.
887 Implemented by Ulrich Drepper.
889 * New locales: ps_AF, my_MM
893 * The following bugs are resolved with this release:
895 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
896 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
897 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
898 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
899 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
901 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
902 Implemented by Ulrich Drepper.
904 * New Linux interfaces: accept4, fallocate, fallocate64.
905 Implemented by Ulrich Drepper.
907 * Correct declarations of string function when used in C++ code. This
908 could lead to compile errors for invalid C++ code.
910 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
913 * New POSIX 2008 interface: psiginfo
914 Implemented by Ulrich Drepper.
916 * New ISO C++1x interfaces: quick_exit, at_quick_exit
917 Implemented by Ulrich Drepper.
919 * Support for selecting between multiple function definitions at runtime
920 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
922 * The libcrypt library can now use the hash function implementations in
923 NSS. Implemented by Ulrich Drepper.
925 * The malloc implementation can be compiled to be less memory efficient
926 but higher performing in multi-threaded programs.
927 Implemented by Ulrich Drepper.
929 * New locales: nan_TW@latin, ks_IN
931 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
932 Implemented by Ulrich Drepper.
934 * Extended printf hook support. It is possible to use user-defined types
935 and extend existing format specifiers.
936 Implemented by Ulrich Drepper.
938 * Handling for group shadow files has been added.
939 Implemented by Ulrich Drepper.
941 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
942 servers (the case, e.g., for some people using the built-in DNS
943 server in ADSL modems/routers). There is a once-per-process timeout
944 in case of a broken server. To avoid it, users can run nscd or put
945 'options single-request' in /etc/resolv.conf.
946 Implemented by Ulrich Drepper.
950 * The following bugs are resolved with this release:
952 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
953 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
954 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
955 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
956 6968, 6974, 6980, 6995, 7008, 7009, 7029
958 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
959 up at the same time. Implemented by Ulrich Drepper.
961 * TLS descriptors for LD and GD on x86 and x86-64.
962 Implemented by Alexandre Oliva.
964 * getaddrinfo now handles DCCP and UDPlite.
965 Implemented by Ulrich Drepper.
967 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
968 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
969 Implemented by Ulrich Drepper.
971 * New implementation of memmem, strstr, and strcasestr which is O(n).
972 Implemented by Eric Blake.
974 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
976 * Implement "e" option for popen to open file descriptor with the
977 close-on-exec flag set. Implemented by Ulrich Drepper.
979 * Implement "b" mode for fmemopen. In this mode writes writes don't
980 implicitly add a NUL byte and seeks from the end of the buffer really
981 use the buffer end, not the string length as the basis.
982 Implemented by Ulrich Drepper.
984 * Many functions, exported and internal, now atomically set the close-on-exec
985 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
987 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
989 Implemented by Pravin Satpute.
991 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
995 * The following bugs are resolved with this release:
997 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
998 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
999 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1000 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1001 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1002 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1003 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1005 * New locales: bo_CN, bo_IN, shs_CA.
1007 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1009 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1010 Implemented by Pravin Satpute.
1012 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1014 * nscd caches now all timeouts for DNS entries
1015 Implemented by Ulrich Drepper.
1017 * nscd is more efficient and wakes up less often.
1018 Implemented by Ulrich Drepper.
1020 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1021 vdprintf, and obstack_vprintf.
1022 Implemented by Jakub Jelinek.
1024 * Faster memset for x86-64.
1025 Implemented by Harsha Jagasia and H.J. Lu.
1027 * Faster memcpy on x86.
1028 Implemented by Ulrich Drepper.
1030 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1031 Implemented by Ulrich Drepper.
1033 * Faster sqrt and sqrtf implemention for some PPC variants.
1034 Implemented by Steven Munroe.
1038 * The following bugs are resolved with this release:
1040 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1041 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1042 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1043 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1044 5071, 5103, 5104, 5112, 5113, 5184, 5186
1046 * More checking functions: fread, fread_unlocked, open*, mq_open.
1047 Implemented by Jakub Jelinek and Ulrich Drepper.
1049 * Extend fortification to C++. Implemented by Jakub Jelinek.
1051 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1052 by not recognizing 'a' as a modifier when those specs are requested.
1053 Implemented by Jakub Jelinek.
1055 * PPC optimizations to math and string functions.
1056 Implemented by Steven Munroe.
1058 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1059 options to be passed. Implemented by Ulrich Drepper.
1061 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1063 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1064 Implemented by Ulrich Drepper.
1066 * Handle private futexes in the NPTL implementation.
1067 Implemented by Jakub Jelinek and Ulrich Drepper.
1069 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1070 Implemented by Roland McGrath and Ulrich Drepper.
1072 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1074 * SHA-256 and SHA-512 based password encryption.
1075 Implemented by Ulrich Drepper.
1077 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1078 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1081 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1082 Implemented by Ulrich Drepper.
1086 * The following bugs are resolved with this release:
1088 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1089 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1090 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1091 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1092 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1093 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1094 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1097 * New Linux interfaces: epoll_pwait, sched_getcpu.
1099 * New generic interfaces: strerror_l.
1101 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1105 * The following bugs are resolved with this release:
1107 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1108 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1109 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1110 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1111 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1112 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1113 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1114 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1115 3225, 3251, 3252, 3253, 3273
1117 * For Linux, the sorting of addresses returned by getaddrinfo now also
1118 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1119 Implemented by Ulrich Drepper.
1121 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1122 Implemented by Ulrich Drepper.
1124 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1126 * New iconv module for MIK. Contributed by Alexander Shopov.
1128 * For sites with broken group and/or passwd database, the auto-propagate
1129 option of nscd can prevent creating ID lookup entries from the results
1130 of a name lookup and vice versa. This usually is no problem but some
1131 site might have problems with the default behavior.
1132 Implemented by Ulrich Drepper.
1134 * Iterating over entire database in NIS can be slow. With the
1135 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1136 to trade time for memory. The entire database will be read at once.
1137 Implemented by Ulrich Drepper.
1139 * The interfaces introduced in RFC 3542 have been implemented by
1142 * Support for the new ELF hash table format was added by Ulrich Drepper.
1144 * Support for priority inheritance mutexes added by Jakub Jelinek and
1147 * Support for priority protected mutexes added by Jakub Jelinek.
1149 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1150 or_IN, csb_PL, fy_NL, sr_ME.
1154 * More overflow detection functions.
1156 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1157 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1159 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1160 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1161 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1162 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1163 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1164 by Masahide Washizawa.
1166 * It is now possible to install audit libraries for the dynamic linker using
1167 LD_AUDIT. Implemented by Ulrich Drepper.
1169 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1170 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1171 For a libc and libpthread that works well on Linux 2.4 kernels, we
1172 recommend using the stable 2.3 branch.
1174 * The new function open_wmemstream acts like open_memstream,
1175 but uses a wchar_t wide character buffer.
1177 * The new function ppoll is an improved version of poll, similar to pselect.
1179 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1180 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1181 renameat, unlinkat, linkat, symlinkat, readlinkat.
1183 * New Linux kernel system calls: unshare,
1184 inotify_init, inotify_add_watch, inotify_rm_watch.
1186 * The euidaccess function is now also known by the alias eaccess,
1187 for compatibility with some other systems.
1189 * Timezone data updated to 2006b version.
1193 * The following bugs are resolved with this release:
1195 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1196 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1197 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1198 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1199 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1200 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1202 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1204 * As of this release, GCC 4 can be used to compile the C Library.
1206 * Timezone data updated to 2005m version.
1210 * The following bugs are resolved with this release:
1212 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1213 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1214 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1215 777, 787, 821, 822, 823, 825
1217 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1221 * Support for RFC 3678. Real implementations exist only for Linux so far.
1222 Implemented by Ulrich Drepper.
1224 * nscd can now cache entries persistently. Expiring entries are reloaded.
1225 For speedups the cache can be shared in memory with client processes.
1226 Implemented by Ulrich Drepper.
1228 * nscd can now perform SELinux checks.
1229 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1231 * getaddrinfo queries are now cached. Canonical name lookup is performed
1233 Implemented by Ulrich Drepper.
1235 * The nothrow function attribute is used when headers are used by gcc when
1236 compiling C code. This can avoid significant amounts of exception
1239 * The malloc functions perform more error checking and are stricter when
1240 it comes to reacting on errors. The default action is to terminate
1241 the process after showing an error message. Implemented by Ulrich Drepper.
1243 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1244 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1246 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1247 namespaces using the new function dlmopen(). This feature is of course,
1248 like most other dynamic loading functionality, not available in statically
1249 linked applications. Implemented by Ulrich Drepper.
1251 * Low-overhead boundary checking variants of string and some stdio functions
1252 were added. These are to be used in conjunction with a gcc patch by
1253 Jakub Jelinek which adds calls to these functions if possible.
1254 Implemented by Jakub Jelinek and Ulrich Drepper.
1256 * Old code for several operating systems and machine architectures that
1257 have not been in working condition in a long time have been removed from
1258 the main source tree maintained by the GNU C Library's maintainers.
1259 These files are now reside in the separate `ports' source module
1260 that is usable as an add-on when building the library.
1264 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1265 interrogate the dynamic linker, compatible with the Solaris interface.
1267 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1268 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1270 * getifaddrs now uses the netlink interface on Linux to get its information.
1271 Implemented by Thorsten Kukuk.
1273 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1274 Implemented by Ulrich Drepper.
1276 * support for non-executable stacks on x86 has been added. Changes mostly
1279 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1282 * getaddrinfo now performs destination address selection according to
1287 * Thread-safe interfaces for many functions that access locale data
1288 were added in version 2.3, but these features were omitted from NEWS.
1289 Many functions have variants with an `_l' suffix that take a `locale_t'
1290 object as a parameter rather than consulting the current locale.
1291 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1292 create and maintain `locale_t' objects. Additionally, the new function
1293 `uselocale' sets "the current locale" (as used by functions not so
1294 parameterized) set for an individual thread. These features were added
1295 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1297 * The functions getresuid, getresgid, setresuid, and setresgid, which
1298 have long been available on Linux, are now declared in <unistd.h>
1299 and are now also available on the Hurd.
1301 * ELF thread-local storage support (TLS) now works on x86-64.
1303 * The new dynamic string token $LIB is expanded in shared library names.
1304 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1306 * Aldy Hernandez contributed complete software floating point support for
1307 PowerPC machines with no FPU.
1309 * fexecve is implemented on Linux.
1311 * The `btowc' function should work at least twice as fast due to
1312 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1314 * With approriate thread add-ons cancelable functions are now implemented
1315 in libc.so as well. No need to call the function in libpthread. This
1316 change allowed to finally disable the incorrect and expensive handling
1317 of weak definition in ld.so.
1319 * Yet more PLT entries in libc.so have been removed. We finally arrived
1320 at the bare minimum. Startup times improved appropriately.
1322 * Support for the new Linux/x86 system call interface was added. The
1323 AT_SYSINFO auxiliary vector entry is recognized and handled.
1327 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1330 * iconv (the program and the interface) now accepts empty names (excluding
1331 options like //TRANSLIT) to mean "use charset of current locale".
1333 * localedef can now transliterate characters in strings which are not in
1334 the provided charmap. The information from the input locale is used.
1336 * Prelinking support was added for ELF targets. This requires additional
1337 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1339 * Read-only stdio streams now use mmap to speed up operation by eliminating
1340 copying and buffer underflows. To use add 'm' to the mode string of
1341 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1343 * The malloc functions were completely rewritten by Wolfram Gloger based
1344 on Doug Lea's malloc-2.7.0.c.
1346 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1347 implementation of regex.
1349 * Bruno Haible upgraded the iconv and locale implementation to support
1352 * Contents of the LC_* and LANG environment variables in the CEN style are
1353 not recognized anymore. It never was used. Change by Ulrich Drepper.
1355 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1356 thread-local storage (TLS) ABI on some platforms.
1357 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1359 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1360 EUC-JISX0213, and TSCII.
1362 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1363 BSD-compatible interface for getting all network interface addresses.
1364 Implementation for IPv4 by Roland McGrath.
1366 * Loading of locale data is faster due to the introduction of a locale
1367 archive. Implemented by Roland McGrath and Ulrich Drepper.
1369 * Startup times are significantly reduced by not using exported functions
1370 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1373 * Steven Munroe contributed a port to PowerPC64/Linux.
1377 * The Hurd now uses the GNU libio implementation of stdio rather than the
1378 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1380 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1381 with the same behavior as the Linux system call of the same name.
1385 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1386 128-bit long double format.
1388 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1389 IBM1161, and IBM1162 charsets.
1391 * Andreas Jaeger contributed a port to x86-64/Linux.
1393 * Peter Bruin contributed a port to PowerPC/Hurd.
1395 * libc functions using I/O streams now can handle wide-oriented streams
1398 * optimizations in the dynamic linker. Binaries created by recent binutils
1399 versions start up quicker due to reduced time spent on relocations.
1401 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1405 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1406 asinh, atanh, j0 for the 128-bit long double format.
1408 * Bruno Haible updated all the code handling Unicode in some form to
1409 support Unicode 3.1.
1411 * Speed of regex for single-byte locales is back to previous levels.
1412 Patch by Isamu Hasegawa.
1414 * Alpha, SPARC, and IA-64 now also using floating stacks.
1416 * Startup time of internationalized applications greatly improved through
1417 iconv cache. Use iconvconfig to generate the cache file.
1418 Contributed by Ulrich Drepper.
1420 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1421 severe performance problems. Patch by David Mosberger.
1423 * The Hurd port got a lot more functionality like AIO, various stdio
1424 extensions, etc. Mainly done by Roland McGrath.
1426 * mtrace can now lookup symbols in shared libraries.
1430 * Intel's IA-64 math library is largely integrated. It provides fast and
1431 accurate implementatations for most basic and standard math functions
1432 in float, double, and long double format.
1434 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1435 and asin for the 96-bit long double format and asin, log, tan for the
1436 128-bit long double format.
1438 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1439 The basic double functions exist today. Contributed by Abraham Ziv
1440 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1441 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1443 * An asynchronous name lookup library was added. The interface is designed
1444 after POSIX AIO. The proposal was circulated beforehand to get comments.
1445 No negative ones came in. Implemented by Ulrich Drepper.
1447 * Port to S390/64bit contributed by Martin Schwidefsky
1448 <schwidefsky@de.ibm.com>.
1450 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1451 of functions for Linux/IA-64.
1453 * The RPC code is now thread safe. Threads can now use the same service
1454 of different services at the same time. Patch by Eric Norum
1455 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1457 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1458 family of functions for Linux/S390.
1460 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1461 of functions for Linux/x86.
1463 * Port to Linux/CRIS contributed by Axis Communications.
1467 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1468 we can now check for namespace violations and missing declarations. The
1469 result is that almost all headers are now Unix-compliant (as defined in
1470 the upcoming XPG6). The negative side is that some programs might need
1471 corrections, too, if they depend on the incorrect form of the headers in
1472 previous versions which defined too many symbols and included too many
1475 * regex now handles multibyte character sets correctly.
1476 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1478 * iconv (the program) does now conform to the upcoming XPG6 and handles
1479 charmaps. Instead of the charset names the path of charmaps can be
1480 provided and the conversion happens based on this data.
1481 Contributed by Ulrich Drepper.
1483 * The locale program now provides detailed information about the installed
1488 only lists the names of the supported locales
1492 provides details such as country, language, and codeset name.
1493 Contributed by Ulrich Drepper.
1497 * The gencat program now parses the input file according to the charset
1498 selected by the LC_CTYPE category. This is important for stateful
1499 character sets. To make generating catalogs easier there is a way
1500 to overwrite the charset selected by the locale: before the first
1501 message or $ quote line the catalog can contain a line like
1503 $ codeset=ISO-8859-2
1505 to select the charset (ISO-8859-2 in this case).
1507 Implemented by Shinya Hanataka and Ulrich Drepper.
1509 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1510 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1511 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1513 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1514 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1516 * The LANGUAGE environment variable is now ignored unless the locale is
1517 changed from the default "C" locale.
1519 * The usual bug fixes.
1523 * Greg McGary added runtime support for bounds checking using gcc's
1524 new -fbounded-pointers option. ix86 target is complete. PowerPC
1527 * Thorsten Kukuk added secure mode support to nscd.
1529 * The Berkeley db libraries have been removed.
1531 Related, the nss_db module is now in a separate package since it
1532 obviously requires a database library being available.
1534 * Wide character I/O streams implemented by Ulrich Drepper.
1536 * Functions from the extended socket API added by Ulrich Drepper.
1538 * Functions feenableexcept and fedisableexcept to control the
1539 behaviour of individual exceptions have been added by Andreas Jaeger.
1541 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1543 * The resolver code has been updated from bind 8.2.3-T5B which supports
1544 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1547 This change could in some situations effect backward compatibility. Since
1548 now `_res' is a thread-local instead of a global variable, modifying it
1549 in one thread does not have any effect in other threads.
1551 The resolver library was also extended to allow IPv6 as the transport
1552 protocol for the requests. This work was done by Stig Venaas.
1554 * Compatibility code for K&R C compilers has been removed from the
1555 header files. A ISO C compiler is needed to use the library
1556 (conforming to either C89 or C99 standard).
1558 * Complete rewrite of the localedef program to support multibyte character
1559 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1560 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1561 Implemented by Ulrich Drepper.
1563 Bruno Haible significantly improved the generation and use of the data
1564 structures for the wide character tables.
1566 * Plural handling in gettext implemented by Ulrich Drepper.
1568 * The utmp daemon has been removed.
1570 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1572 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1575 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1577 * POSIX barriers implemented by Kaz Kylheku.
1579 * POSIX spawn function family implemented by Ulrich Drepper.
1581 * POSIX spinlocks are now available.
1583 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1585 * the configure option --enable-kernel=X.Y.Z allows to strip out
1586 compatibility for kernel versions before X.Y.Z. This is currently only
1587 implemented for Linux.
1589 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1590 field sin6_scope_id. This means that all programs using IPv6 should be
1591 recompiled. Don't expect binary compatibility with previous glibc
1594 * various conversion modules for IBM character sets contributed by
1597 * IA-64 port by Jes Sorensen and HJ Lu.
1611 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1613 * New xdr functions are added; some rpc functions are now 64bit clean.
1615 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1617 * Fixed known incompatibilities with glibc 2.0.
1619 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1621 * Optimized a number of functions (especially the ELF dynamic loader).
1623 * Update timezone data files.
1625 * lots of charmaps corrections
1627 * some new locale definitions and charmaps
1632 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1633 conform to POSIX member type requirements. Symbol versions have been
1634 adjusted as needed within the library, and for direct use by applications,
1635 but there is potential for problems if third-party libraries use
1636 struct timeval as part of their interface. This does not present
1637 a problem for X and other "essential" system libraries.
1639 * An additional locale model to support C++ Standard Library locale
1640 model and probably more was implemented by Ulrich Drepper.
1642 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1645 * Miles Bader provided the `argp' function family to support hierachical
1646 command line argument parsing, layered on top of getopt.
1648 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1650 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1653 * scanf recognizes the %a and %A format for scanning floating point numbers.
1655 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1656 information and interfaces for the available integer types.
1658 * about 130 new math functions were added to implement the ISO C9x math
1661 * the new header <complex.h> contains definitions of the complex math
1662 functions from ISO C 9X.
1664 * the new header <tgmath.h> defines generic macros to use complex or
1665 real valued functions.
1667 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1669 * Andreas Jaeger provided a test suite for the math library.
1671 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1673 * Ulrich Drepper added character set conversion functions (iconv).
1675 * Optimized string functions have been added.
1677 * The localedata addon is now part of glibc.
1679 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1681 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1682 daemon for NSS (nscd).
1684 Missing a better place here are some numbers on improvements. Under
1685 Linux 2.1.125 un-tar-ing the kernel sources takes
1689 using local files 12.19s 6.88s 22.91s
1691 using NIS 13.92s 8.91s 26.34s
1693 using NIS & nscd 10.37s 7.34s 25.30s
1695 using NIS+ 27.57s 30.37s 640.46s
1697 using NIS+ & nscd 10.25s 7.83s 26.51s
1699 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1701 Keep in mind that non-namelookup related operations dominate above times.
1702 It was just a common complain that using NIS+ unpacking the kernel is
1705 [1] The old nscd implementation is not available anymore since it was
1706 distributed with glibc up to version 2.0.98 and thus is now replaced.
1708 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1710 * Mark Kettenis provided a Hesiod NSS module.
1712 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1713 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1715 * rcmd can now handle netgroups (Dick Streefland).
1717 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1720 * Support for the IPv6 protocol has been added to the socket API, as per the
1721 latest draft standards.
1723 * Support for Linux 2.2 has been added.
1725 * Interface changes relative to the latest 2.0.x release:
1726 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1727 addseverity NEW: Unix98
1728 alphasort64 NEW: LFS
1729 argp_err_exit_status NEW: argp, GNU ext
1730 argp_error NEW: argp, GNU ext
1731 argp_failure NEW: argp, GNU ext
1732 argp_help NEW: argp, GNU ext
1733 argp_parse NEW: argp, GNU ext
1734 argp_program_bug_address NEW: argp, GNU ext
1735 argp_program_version NEW: argp, GNU ext
1736 argp_program_version_hook NEW: argp, GNU ext
1737 argp_state_help NEW: argp, GNU ext
1738 argp_usage NEW: argp, GNU ext
1739 authdes_create NEW: Secure RPC
1740 authdes_getucred NEW: Secure RPC
1741 authdes_pk_create NEW: Secure RPC
1742 backtrace NEW: GNU ext.
1743 backtrace_symbols NEW: GNU ext.
1744 backtrace_symbols_fd NEW: GNU ext.
1746 cacosf NEW: ISO C 9x
1747 cacosh NEW: ISO C 9x
1748 cacoshf NEW: ISO C 9x
1749 cacoshl NEW: ISO C 9x
1750 cacosl NEW: ISO C 9x
1757 casinf NEW: ISO C 9x
1758 casinh NEW: ISO C 9x
1759 casinhf NEW: ISO C 9x
1760 casinhl NEW: ISO C 9x
1761 casinl NEW: ISO C 9x
1763 catanf NEW: ISO C 9x
1764 catanh NEW: ISO C 9x
1765 catanhf NEW: ISO C 9x
1766 catanhl NEW: ISO C 9x
1767 catanl NEW: ISO C 9x
1768 cbc_crypt NEW: Secure RPC
1772 ccoshf NEW: ISO C 9x
1773 ccoshl NEW: ISO C 9x
1779 cimagf NEW: ISO C 9x
1780 cimagl NEW: ISO C 9x
1781 clearerr_locked REMOVED
1782 clntunix_create NEW: sunrpc ext
1784 clog10 NEW: ISO C 9x
1785 clog10f NEW: ISO C 9x
1786 clog10l NEW: ISO C 9x
1796 cprojf NEW: ISO C 9x
1797 cprojl NEW: ISO C 9x
1799 crealf NEW: ISO C 9x
1800 creall NEW: ISO C 9x
1805 csinhf NEW: ISO C 9x
1806 csinhl NEW: ISO C 9x
1809 csqrtf NEW: ISO C 9x
1810 csqrtl NEW: ISO C 9x
1814 ctanhf NEW: ISO C 9x
1815 ctanhl NEW: ISO C 9x
1817 des_setparity NEW: Secure RPC
1818 ecb_crypt NEW: Secure RPC
1819 endutxent NEW: Unix98
1821 exp10f NEW: ISO C 9x
1822 exp10l NEW: ISO C 9x
1826 fattach NEW: STREAMS
1827 fdetach NEW: STREAMS
1831 feclearexcept NEW: ISO C 9x
1832 fegetenv NEW: ISO C 9x
1833 fegetexceptflag NEW: ISO C 9x
1834 fegetround NEW: ISO C 9x
1835 feholdexcept NEW: ISO C 9x
1837 feraiseexcept NEW: ISO C 9x
1838 ferror_locked REMOVED
1839 fesetenv NEW: ISO C 9x
1840 fesetexceptflag NEW: ISO C 9x
1841 fesetround NEW: ISO C 9x
1842 fetestexcept NEW: ISO C 9x
1843 feupdateenv NEW: ISO C 9x
1844 fflush_locked REMOVED
1848 fgets_unlocked NEW: GNU ext.
1849 fileno_locked REMOVED
1861 fputc_locked REMOVED
1862 fputs_unlocked NEW: GNU ext.
1863 fread_unlocked NEW: GNU ext.
1868 fstatvfs NEW: Unix98
1872 ftruncate64 NEW: LFS
1874 fwrite_unlocked NEW: GNU ext.
1875 gai_strerror NEW: IPv6
1879 getchar_locked REMOVED
1881 getdate_err NEW: Unix98
1882 getdate_r NEW: GNU ext.
1884 getnameinfo NEW: IPv6
1885 getnetname NEW: Secure RPC
1886 getpmsg NEW: STREAMS
1887 getpt NEW: Unix98 PTY
1888 getrlimit64 NEW: LFS
1889 getutxent NEW: Unix98
1890 getutxid NEW: Unix98
1891 getutxline NEW: Unix98
1892 glob64 NEW: GNU ext.
1893 globfree64 NEW: GNU ext.
1894 gnu_get_libc_release NEW: GNU ext.
1895 gnu_get_libc_version NEW: GNU ext.
1896 grantpt NEW: Unix98 PTY
1897 host2netname NEW: Secure RPC
1899 iconv_close NEW: iconv
1900 iconv_open NEW: iconv
1901 if_freenameindex NEW: IPv6
1902 if_indextoname NEW: IPv6
1903 if_nameindex NEW: IPv6
1904 if_nametoindex NEW: IPv6
1905 in6addr_any NEW: IPv6
1906 in6addr_loopback NEW: IPv6
1907 inet6_isipv4mapped NEW: IPv6
1908 isastream NEW: STREAMS
1909 iswblank NEW: GNU ext.
1910 key_decryptsession NEW: Secure RPC
1911 key_decryptsession_pk NEW: Secure RPC
1912 key_encryptsession NEW: Secure RPC
1913 key_encryptsession_pk NEW: Secure RPC
1914 key_gendes NEW: Secure RPC
1915 key_get_conv NEW: Secure RPC
1916 key_secretkey_is_set NEW: Secure RPC
1917 key_setnet NEW: Secure RPC
1918 key_setsecret NEW: Secure RPC
1919 llrint NEW: ISO C 9x
1920 llrintf NEW: ISO C 9x
1921 llrintl NEW: ISO C 9x
1922 llround NEW: ISO C 9x
1923 llroundf NEW: ISO C 9x
1924 llroundl NEW: ISO C 9x
1929 lrintf NEW: ISO C 9x
1930 lrintl NEW: ISO C 9x
1931 lround NEW: ISO C 9x
1932 lroundf NEW: ISO C 9x
1933 lroundl NEW: ISO C 9x
1935 makecontext NEW: Unix98
1936 mempcpy NEW: GNU ext.
1939 modify_ldt NEW: kernel
1943 nearbyint NEW: ISO C 9x
1944 nearbyintf NEW: ISO C 9x
1945 nearbyintl NEW: ISO C 9x
1946 netname2host NEW: Secure RPC
1947 netname2user NEW: Secure RPC
1948 nexttoward NEW: ISO C 9x
1949 nexttowardf NEW: ISO C 9x
1950 nexttowardl NEW: ISO C 9x
1954 passwd2des NEW: Secure RPC
1956 pow10f NEW: GNU ext.
1957 pow10l NEW: GNU ext.
1960 printf_size NEW: GNU ext.
1961 printf_size_info NEW: GNU ext.
1962 profil_counter REMOVED
1963 pthread_mutexattr_getkind_np REPLACED
1964 pthread_mutexattr_setkind_np REPLACED
1965 ptsname NEW: Unix98 PTY
1966 ptsname_r NEW: Unix98 PTY
1968 putchar_locked REMOVED
1969 putgrent NEW: GNU ext.
1971 putpmsg NEW: STREAMS
1972 pututxline NEW: Unix98
1976 readdir64_r NEW: LFS
1977 remquo NEW: ISO C 9x
1978 remquof NEW: ISO C 9x
1979 remquol NEW: ISO C 9x
1981 roundf NEW: ISO C 9x
1982 roundl NEW: ISO C 9x
1984 scalbln NEW: ISO C 9x
1985 scalblnf NEW: ISO C 9x
1986 scalblnl NEW: ISO C 9x
1988 sendfile NEW: kernel
1989 setcontext NEW: Unix98
1990 setrlimit64 NEW: LFS
1991 setutxent NEW: Unix98
1993 sigignore NEW: Unix98
1994 sigqueue NEW: POSIX.1b
1995 sigrelse NEW: Unix98
1996 sigset NEW: POSIX.1b
1997 sigtimedwait NEW: POSIX.1b
1998 sigwaitinfo NEW: POSIX.1b
1999 sincos NEW: GNU ext.
2000 sincosf NEW: GNU ext.
2001 sincosl NEW: GNU ext.
2005 strcasestr NEW: GNU ext.
2006 strtoimax NEW: ISO C 9x
2007 strtoumax NEW: ISO C 9x
2008 strverscmp NEW: GNU ext.
2009 svcauthdes_stats NEW: Secure RPC
2010 svcunix_create NEW: sunrpc etx
2011 svcunixfd_create NEW: sunrpc ext
2012 swapcontext NEW: Unix98
2013 tcgetsid NEW: Unix98 PTY
2014 tdestroy NEW: GNU ext.
2015 tgamma NEW: ISO C 9x
2016 tgammaf NEW: ISO C 9x
2017 tgammal NEW: ISO C 9x
2021 truncf NEW: ISO C 9x
2022 truncl NEW: ISO C 9x
2024 unlockpt NEW: Unix98 PTY
2025 updwtmpx NEW: Unix98
2026 user2netname NEW: Secure RPC
2027 utmpxname NEW: Unix98
2028 versionsort NEW: GNU ext.
2029 versionsort64 NEW: GNU ext.
2031 wcscasecmp NEW: GNU ext.
2032 wcsncasecmp NEW: GNU ext.
2033 wcsnlen NEW: GNU ext.
2034 wcstoimax NEW: ISO C 9x
2035 wcstoll NEW: ISO C 9x
2036 wcstoull NEW: ISO C 9x
2037 wcstoumax NEW: ISO C 9x
2039 wordexp NEW: POSIX.2
2040 wordfree NEW: POSIX.2
2041 write_profiling REMOVED
2042 xdecrypt NEW: Secure RPC
2043 xdr_authdes_cred NEW: Secure RPC
2044 xdr_authdes_verf NEW: Secure RPC
2045 xdr_cryptkeyarg NEW: Secure RPC
2046 xdr_cryptkeyarg2 NEW: Secure RPC
2047 xdr_cryptkeyres NEW: Secure RPC
2048 xdr_getcredres NEW: Secure RPC
2049 xdr_key_netstarg NEW: Secure RPC
2050 xdr_key_netstres NEW: Secure RPC
2051 xdr_keybuf NEW: Secure RPC
2052 xdr_keystatus NEW: Secure RPC
2053 xdr_netnamestr NEW: Secure RPC
2054 xdr_sizeof NEW: Secure RPC
2055 xdr_unixcred NEW: sunrpc ext
2056 xencrypt NEW: Secure RPC
2057 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2068 * inet_ntoa is thread-safe
2070 * updwtmp is moved from libutil to libc
2072 * rewrite of cbrt function
2074 * update of timezone data
2088 * add atoll function
2090 * fix complex problems in Berkeley DB code
2092 * fix math functions
2096 * fixed lots of header problems (especially Linux/GNU specific)
2098 * dynamic loader preserves all registers
2100 * Roland McGrath provided support for handling of auxiliary objects in
2101 the ELF dynamic loader.
2103 * support for parallel builds is improved
2107 * GNU extensions are no longer declared by default. To enable them you
2108 must define the macro `_GNU_SOURCE' in your program or compile with
2111 * The library has changed from using GNU ld symbol aliases to using weak
2112 symbols where available. The ELF object file format supports weak
2113 symbols; GNU ld also supports weak symbols in the a.out format. (There
2114 is also now support for other GNU ld extensions in ELF. Use the
2115 `--with-elf' option to configure to indicate you have ELF, and
2116 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2117 of many files which contained only symbol aliases, reducing the size of
2118 the source and the compiled library; many other files were renamed to
2119 less cryptic names previously occupied by the symbol alias files.
2120 There is a new header file <elf.h> for programs which operate on
2121 files in the ELF format.
2123 * Converted to Autoconf version 2, so `configure' has more options.
2124 Run `configure --help' to see the details.
2126 * The library can now be configured to build profiling, highly-optimized
2127 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2128 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2129 `configure' enable building these extra libraries. The shared library is
2130 built by default when using both ELF and GNU ld. When shared libraries
2131 are enabled, the new library `-ldl' is available for arbitrary run-time
2132 loading of shared objects; its interface is defined in <dlfcn.h>. The
2133 new header file <link.h> gives access to the internals of the run-time
2134 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2135 application of same name on other systems and it provides information
2136 about dynamically linked binaries.
2138 * The C library now provides the run-time support code for profiling
2139 executables compiled with `-pg'. Programs can control the profiling code
2140 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2141 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2142 the support for this file format was contributed by David Mosberger-Tang.
2144 * The math code has been replaced with a math library based on fdlibm from
2145 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2146 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2147 functions. The math functions now reside in a separate library, so
2148 programs using them will need to use `-lm' their linking commands.
2150 * John C. Bowman contributed optimized ix87 assembler inline functions.
2152 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2153 mechanism similar to that found in Solaris 2. This is now used for the
2154 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2155 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2156 file controls what services are used for each individual database. This
2157 works by loading shared libraries with names specified in `nsswitch.conf',
2158 so service modules can be changed or added at any time without even
2159 relinking any program. Currently there are the file, db, and NIS based
2160 NSS services available.
2162 * The new functions `strtoq' and `strtouq' parse integer values from
2163 strings, like `strtol' and `strtoul', but they return `long long int' and
2164 `unsigned long long int' values, respectively (64-bit quantities).
2166 * The new functions `strtof' and `strtold' parse floating-point values from
2167 strings, like `strtod', but they return `float' and `long double' values,
2168 respectively (on some machines `double' and `long double' are the same).
2170 * Ulrich Drepper has contributed new implementations of the floating-point
2171 printing and reading code used in the `printf' family of functions and
2172 `strtod', `strtof', and `strtold'. These new functions are perfectly
2173 accurate, and much faster than the old ones.
2175 * The implementation of the POSIX locale model was completely rewritten by
2176 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2177 to compile the POSIX locale definition.
2179 * The former dummy implementations of the strcoll and strxfrm function are
2180 now replaced by fully functional code contributed by Ulrich Drepper. The
2181 collation information comes from the POSIX locale definitions.
2183 * The new header <langinfo.h> defines an interface for accessing
2184 various locale-dependent data (using the locale chosen with `setlocale').
2186 * Ulrich Drepper has contributed a new suite of functions for operation on
2187 wide-character and multibyte-character strings, in <wchar.h>;
2188 and classification and case conversion of wide characters, in <wctype.h>.
2189 These new functions are conforming to the ISO C, Amendement 1 specification.
2191 * There is now a second implementation of the standard I/O library available.
2192 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2193 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2195 * You can now use positional parameter specifications in format strings
2196 for the `printf' and `scanf' families of functions. For example,
2197 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2198 ``Number 6, Mr Jones''. This is mainly useful when providing different
2199 format strings for different languages, whose grammars may dictate
2200 different orderings of the values being printed. To support this
2201 feature, the interface for `register_printf_handler' has changed; see
2202 the header file <printf.h> for details.
2204 * The `printf' and `scanf' families of functions now understand a new
2205 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2206 to group numbers as indicated by the locale; for `scanf' and friends, this
2207 says to accept as valid only a number with all the proper grouping
2208 separators in the right places. In the default "C" locale, numbers are
2209 not grouped; but locales for specific countries will define the usual
2210 conventions (i.e. separate thousands with `,' in the US locale).
2212 * The pgrp functions have been regularized, slightly incompatibly but much
2213 less confusingly. The core functions are now `getpgid' and `setpgid',
2214 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2215 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2216 provided for compatibility. There is no longer an incompatible `getpgrp'
2217 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2219 * The new header file <fts.h> and suite of functions simplify programs that
2220 operate on directory trees. This code comes from 4.4 BSD.
2222 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2223 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2224 NSS scheme used in glibc.
2226 * There is a new malloc debugging hook `__memalign_hook'.
2228 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2229 `unsigned int' in <sys/types.h>. These are for compatibility only and
2230 their use is discouraged.
2232 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2233 done differently, so that it works even without GNU ld.
2235 * New function `euidaccess' checks allowed access to a file like `access',
2236 but using the effective IDs instead of the real IDs.
2238 * The time zone data files have been updated for the latest and greatest
2239 local time conventions of the countries of the world.
2241 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2244 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2245 for formatting floating-point numbers. They are provided only for
2246 compatibility; new programs should use `sprintf' instead. There are
2247 also equivalent function for the `long double' floating-point type and
2248 all functions also exist in a reentrant form.
2250 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2251 functions for maintaining the login-record files (primarily of use to
2252 system programs such as `login'), and convenient functions for
2253 allocating and initializing a pseudo-terminal (pty) device.
2255 * Ulrich Drepper has contributed new support for System V style
2256 shared memory and IPC on systems that support it.
2258 * Ulrich Drepper has contributed several miscellaneous new functions found
2259 in System V: The `hsearch' family of functions provide an effective
2260 implementation of hash tables; `a64l' and `l64a' provide a very simple
2261 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2264 * Ulrich Drepper has contributed new reentrant counterparts for the
2265 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2267 * Ulrich Drepper has contributed new, highly-optimized versions of several
2268 string functions for the i486/Pentium family of processors.
2270 * Ulrich Drepper has updated the Linux-specific code, based largely
2271 on work done in Hongjiu Lu's version of GNU libc for Linux.
2272 The GNU library now supports Linux versions 2.0.10 and later,
2273 using the ELF object file format (i[3456]86-*-linux).
2275 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2277 * David Mosberger-Tang and Richard Henderson have ported the C library
2278 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2279 dynamic linking support for ELF/Alpha.
2281 * Richard Henderson contributed several Alpha optimized assembler function
2282 for arithmetic and string handling.
2284 * Ulrich Drepper has contributed a new set of message catalog functions to
2285 support multiple languages using the <libintl.h> interface, for use with
2286 his new package GNU gettext. Translation volunteers have contributed
2287 catalogs of the library's messages in Spanish, German, and Korean.
2289 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2290 program and the `catgets' function for reading the catalog files it
2291 creates. (The <libintl.h> interface is preferred; we include the
2292 <nl_types.h> interface using `catgets' only for source compatibility with
2293 programs already written to use it.)
2295 * New header file <values.h> gives SVID-compatible names for <limits.h>
2298 * Various new macros, declarations, and small header files for compatibility
2301 * New function `group_member' is a convenient way to check if a process has
2302 a given effective group ID.
2304 * When using GCC 2.7 and later, the socket functions are now declared in a
2305 special way so that passing an argument of type `struct sockaddr_in *',
2306 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2307 `struct sockaddr *' type, does not generate a type-clash warning.
2309 * New function `error' declared in header file <error.h> is a convenient
2310 function for printing error messages and optionally exiting; this is the
2311 canonical function used in GNU programs. The new functions `err', `warn',
2312 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2313 doing the same thing.
2315 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2316 POSIX.2 `glob' function to do ~ and {...} expansion.
2318 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2319 `clearenv' which is used in POSIX.9 is also available.
2321 * New function `getsid' returns session ID number on systems that support it.
2323 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2324 files <db.h> and <mpool.h> provide a rich set of functions for several
2325 types of simple databases stored in memory and in files, and <ndbm.h> is
2326 an old `ndbm'-compatible interface using the `db' functions. Link with
2327 `-ldb' to get these functions.
2329 * New macro `strdupa' copies a string like `strdup', but uses local stack
2330 space from `alloca' instead of dynamic heap space from `malloc'.
2332 * New function `strnlen' is like `strlen' but searches only a given maximum
2333 number of characters for the null terminator. `stpncpy', `strndup' and
2334 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2337 * New function `statfs' in header <sys/statfs.h>.
2339 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2340 provide convenient functions for operating on blocks of null-terminated
2343 * A new suite of functions in <utmp.h> handle all the details of reading
2344 and writing the utmp file.
2346 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2349 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2350 completely POSIX compliant and also implemented the extended functionality
2351 to handle alternate digit representation and alternate era date formats.
2353 * Ulrich Drepper provided an implementation of the `strptime' function
2354 defined in XPG4.2 which transforms a string into a `struct tm' value.
2356 * Paul Eggert provided the tzselect shell script as part of the timezone
2357 code. The shell script makes it easy to select the correct timezone
2360 * The implementation of the malloc family of functions is completely replaced
2361 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2362 The implementation uses the mmap function (if available) and it is
2363 optimized for the use in multi threaded programs.
2365 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2366 functions. This new functionality is usable by specifying a special
2367 salt string and it is compatible with implementation on *BSD systems.
2369 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2370 `getsubopt' to handle second level command line options, `bsd_signal'
2371 to access BSD style `signal' functionality, the obsolete `regexp' style
2374 * the `lchown' function is available on system which support this
2377 * The implementation of the shadow password handling function was contributed
2380 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2382 * POSIX.1g support was added. The <sys/select.h> header is available,
2383 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2384 implementation of `getaddrinfo'.
2388 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2390 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2391 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2393 * The new function `daemon' from 4.4 BSD is useful for server programs that
2394 want to put themselves in the background.
2396 * Joel Sherrill has contributed support for several standalone boards that
2397 run without an operating system.
2399 * `printf', `scanf' and friends now accept a `q' type modifier for long
2400 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2402 * All of the code taken from BSD (notably most of the math and networking
2403 routines) has been updated from the BSD 4.4-Lite release.
2405 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2407 * The new functions `getdomainname' and `setdomainname' fetch or change the
2408 YP/NIS domain name. These are system calls which exist on systems which
2411 * The time zone data files have been updated for the latest international
2414 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2415 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2419 * The C library now includes support for Sun RPC, from Sun's free
2420 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2421 are included. (There is still no support for YP.)
2423 * Tom Quinn has contributed a port of the C library to SGI machines running
2424 Irix 4 (mips-sgi-irix4).
2426 * The new `lockf' function is a simplified interface to the locking
2427 facilities of `fcntl', included for compatibility.
2429 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2431 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2433 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2436 * The error message printed by `assert' for a failed assertion now includes
2437 the name of the program (if using GNU ld) and the name of the calling
2438 function (with versions of GCC that support this).
2440 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2442 * The library now includes the <sys/mman.h> header file and memory
2443 management functions `mmap', `munmap', `mprotect', `msync', and
2444 `madvise', on systems that support those facilities.
2446 * The interface for `mcheck' has changed slightly: the function called to
2447 abort the program when an allocation inconsistency is detected now takes
2448 an argument that indicates the type of failure. The new function
2449 `mprobe' lets you request a consistency check for a particular block at
2450 any time (checks are normally done only when you call `free' or `realloc'
2453 * It is now possible to easily cross-compile the C library, building on one
2454 system a library to run on another machine and/or operating system. All
2455 you need to do is set the variable `HOST_CC' in `configparms' to the
2456 native compiler for programs to run on the machine you are building on (a
2457 few generator programs are used on Unix systems); set `CC' to the
2460 * The new function `fexecve' (only implemented on the GNU system) executes
2461 a program file given a file descriptor already open on the file.
2465 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2466 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2468 * You can set the variable `libprefix' in `configparms' to specify a prefix
2469 to be prepended to installed library files; this makes it easy to install
2470 the GNU C library to be linked as `-lgnuc' or whatever.
2472 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2473 copies a limited number of characters from a string, and returns the
2474 address of the last character written.
2476 * You no longer need to check for whether the installed `stddef.h' is
2477 compatible with the GNU C library. configure now checks for you.
2479 * You can now define a per-stream `fileno' function to convert the
2480 stream's cookie into an integral file descriptor.
2482 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2483 allocates zero bytes of storage, and returns a unique pointer which
2484 you can pass to `realloc' or `free'. The behavior is undefined if
2485 you dereference this pointer.
2487 * The C library now runs on Sony NEWS m68k machines running either
2488 NewsOS 3 or NewsOS 4.
2490 * The new `syscall' function is a system-dependent primitive function
2491 for invoking system calls. It has the canonical behavior on Unix
2492 systems, including unreliable return values for some calls (such as
2493 `pipe', `fork' and `getppid').
2495 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2496 to `EAGAIN', which is the preferred name. On systems whose kernels
2497 use two distinct codes, the C library now translates EWOULDBLOCK to
2498 EAGAIN in every system call function.
2502 * The GNU C Library Reference Manual is now distributed with the library.
2503 `make dvi' will produce a DVI file of the printed manual.
2504 `make info' will produce Info files that you can read on line using C-h i
2505 in Emacs or the `info' program.
2506 Please send comments on the manual to bug-glibc-manual@gnu.org.
2508 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2510 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2512 * Jason Merrill has contributed a port to the Sequent Symmetry running
2513 Dynix version 3 (i386-sequent-dynix).
2515 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2516 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2518 * New function `memory_warnings' lets you arrange to get warnings when
2519 malloc is running out of memory to allocate, like Emacs gives you.
2521 * The C library now contains the relocating allocator used in Emacs 19 for
2522 its editing buffers. This allocator (ralloc) minimizes allocation
2523 overhead and fragmentation by moving allocated regions around whenever it
2524 needs to. You always refer to a ralloc'd region with a "handle" (a
2525 pointer to a pointer--an object of type `void **').
2527 * There is a new `printf' format: `%m' gives you the string corresponding
2528 to the error code in `errno'.
2530 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2531 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2532 pass, the `a' modifier says to fill in a `char **' you pass with a
2535 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2536 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2537 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2539 * `mkstemp' is a traditional Unix function to atomically create and open a
2540 uniquely-named temporary file.
2544 * The standard location for the file that says what the local timezone is
2545 has changed again. It is now `/usr/local/etc/localtime' (or more
2546 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2548 * The distribution no longer contains any files with names longer than 14
2551 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2552 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2554 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2558 * The configuration process has changed quite a bit. The `configure'
2559 script is now used just like the configuration scripts for other GNU
2560 packages. The `sysdeps' directory hierarchy is much rearranged.
2561 The file `INSTALL' explains the new scheme in detail.
2563 * The header files no longer need to be processed into ANSI C and
2564 traditional C versions. There is just one set of files to install, and
2565 it will work with ANSI or old C compilers (including `gcc -traditional').
2567 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2568 MIPS DECStation running Ultrix 4.
2570 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2571 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2572 made itself into a shared library.
2574 * Yet further improved support for the i386, running 4.3 BSD-like systems
2575 (such as Mach 3 with the Unix single-server), or System V.
2577 * New function `strncasecmp' to do case-insensitive string comparison
2578 with limited length.
2580 * New function `strsep' is a reentrant alternative to `strtok'.
2582 * New functions `scandir' and `alphasort' for searching directories.
2584 * New function `setenv' is a better interface to `putenv'.
2586 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2587 function for traversing a directory tree.
2589 * The GNU obstack package is now also part of the C library.
2590 The new function `open_obstack_stream' creates a stdio stream that
2591 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2592 formatted output directly to an obstack.
2594 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2595 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2597 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2599 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2600 things to your strings.
2602 * There are some new test programs: test-fseek, testmb, and testrand.
2604 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2605 These ports are not finished, but are a good starting place for really
2606 supporting those systems.
2608 * `/etc/localtime' is now the standard location for the file that says what
2609 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2610 This follows the general principle that `/etc' is the place for all local
2611 configuration files.
2613 * The C library header files now use `extern "C"' when used by the C++
2614 compiler, so the C library should now work with C++ code.
2616 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2617 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2620 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2621 function which uses the `merge sort' algorithm, and is said to be
2622 significantly faster than the old GNU `qsort' function. Merge sort is
2623 now the standard `qsort' function. The new algorithm can require a lot
2624 of temporary storage; so, the old sorting function is called when the
2625 required storage is not available.
2627 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2628 provides the Unix `crypt' function, plus some other entry points.
2630 * The code and header files taken from 4.4 BSD have been updated with the
2631 latest files released from Berkeley.
2633 ----------------------------------------------------------------------
2634 Copyright information:
2636 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2638 Permission is granted to anyone to make or distribute verbatim copies
2639 of this document as received, in any medium, provided that the
2640 copyright notice and this permission notice are preserved,
2641 thus giving the recipient permission to redistribute in turn.
2643 Permission is granted to distribute modified versions
2644 of this document, or of portions of it,
2645 under the above conditions, provided also that they
2646 carry prominent notices stating who last changed them.
2649 version-control: never