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, 14841, 13064, 14094, 15319, 15467, 15790, 15969, 16560, 16783,
13 17269, 17523, 17569, 17588, 17792, 17836, 17912, 17916, 17932, 17944,
14 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991, 17996, 17998,
15 17999, 18019, 18020, 18029, 18032.
17 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
18 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
19 Hat). These updates cause user visible changes, such as the fix for bug
25 * The following bugs are resolved with this release:
27 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
28 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
29 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
30 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
31 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
32 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
33 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
34 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
35 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
36 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
39 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
40 too little memory for the to-be-scanned arguments and overflow the
41 allocated buffer. The implementation now correctly computes the required
42 buffer size when using malloc, and switches to malloc from alloca as
45 * A new semaphore algorithm has been implemented in generic C code for all
46 machines. Previous custom assembly implementations of semaphore were
47 difficult to reason about or ensure that they were safe. The new version
48 of semaphore supports machines with 64-bit or 32-bit atomic operations.
49 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
50 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
52 * Port to Altera Nios II has been contributed by Mentor Graphics.
54 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
55 implementations for powerpc64/powerpc64le.
56 Implemented by Adhemerval Zanella (IBM).
58 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
59 and powerpc64le. This may improve lock scaling of existing programs on
60 HTM capable systems. The lock elision code is only enabled with
61 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
62 powerpc will issue a transaction abort on every syscall to avoid side
63 effects being visible outside transactions.
65 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
66 AArch64. Contributed by ARM Ltd.
68 * i386 memcpy functions optimized with SSE2 unaligned load/store.
70 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
71 under certain input conditions resulting in the execution of a shell for
72 command substitution when the application did not request it. The
73 implementation now checks WRDE_NOCMD immediately before executing the
74 shell and returns the error WRDE_CMDSUB as expected.
76 * CVE-2012-3406 printf-style functions could run into a stack overflow when
77 processing format strings with a large number of format specifiers.
79 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
80 infinite loop if the DNS response contained a PTR record of an unexpected
83 * The minimum GCC version that can be used to build this version of the GNU
84 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
85 still be used to compile programs using the GNU C Library.
87 * The GNU C Library is now built with -Werror by default. This can be
88 disabled by configuring with --disable-werror.
90 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
92 * The obsolete sigvec function has been removed. This was the original
93 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
94 programs have been using instead for about 25 years. Of course, ABI
95 compatibility for old binaries using sigvec remains intact.
97 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
98 with newer versions of bison.
100 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
101 The original MIPS o32 hard-float ABI requires an FPU where double-precision
102 registers overlay two consecutive single-precision registers. MIPS32R2
103 introduced a new FPU mode (FR=1) where double-precision registers extend the
104 corresponding single-precision registers which is incompatible with the
105 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
106 require the use of FR=1 making a transition necessary. New o32 ABI
107 extensions enable users to migrate over time from the original o32 ABI
108 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
109 tracks the ABI of any loaded object and verifies that new objects are
110 compatible. Mode transitions will also be requested as required and
111 unsupportable objects will be rejected. The ABI checks include both soft and
112 hard float ABIs for o32, n32 and n64.
114 GCC 5 with GNU binutils 2.25 onwards:
115 It is strongly recommended that all o32 system libraries are built using the
116 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
117 with the original and all new o32 ABI extensions. Configure a MIPS GCC
118 compiler using --with-fp-32=xx to set this by default.
122 * The following bugs are resolved with this release:
124 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
125 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
126 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
127 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
128 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
129 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
130 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
131 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
132 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
133 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
134 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
135 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
136 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
137 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
138 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
140 * Reverted change of ABI data structures for s390 and s390x:
141 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
142 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
143 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
144 are preserved pointing straight to the same implementation as the old ones.
145 Given that, new callers will simply provide a too-big buffer to these
146 functions. Any applications/libraries out there that embed jmp_buf or
147 ucontext_t in an ABI-relevant data structure that have already been rebuilt
148 against 2.19 headers will have to rebuilt again. This is necessary in any
149 case to revert the breakage in their ABI caused by the glibc change.
151 * Support for file description locks is added to systems running the
152 Linux kernel. The standard file locking interfaces are extended to
153 operate on file descriptions, not file descriptors, via the use of
154 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
155 are associated with an open file instead of a process.
157 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
159 * The minimum Linux kernel version that this version of the GNU C Library
160 can be used with is 2.6.32.
162 * Running the testsuite no longer terminates as soon as a test fails.
163 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
164 with PASS or FAIL lines for individual tests. A summary of the results is
165 printed, including a list of failing lists, and "make check" exits with
166 error status if there were any unexpected failures. "make check
167 stop-on-test-failure=y" may be used to keep the old behavior.
169 * The am33 port, which had not worked for several years, has been removed
172 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
173 supported; they now act the same as _DEFAULT_SOURCE (but generate a
174 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
175 conflicted with POSIX (support for which was removed in 2.19), the
176 interfaces those macros enabled remain available when compiling with
177 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
180 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
182 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
183 This may improve lock scaling of existing programs on TX capable systems.
184 The lock elision code is only built with --enable-lock-elision=yes and
185 then requires a GCC version supporting the TX builtins. With lock elision
186 default mutexes are elided via __builtin_tbegin, if the cpu supports
187 transactions. By default lock elision is not enabled and the elision code
190 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
191 copy the path argument. This allowed programs to cause posix_spawn to
192 deference a dangling pointer, or use an unexpected pathname argument if
193 the string was modified after the posix_spawn_file_actions_addopen
196 * All supported architectures now use the main glibc sysdeps directory
197 instead of some being in a separate "ports" directory (which was
198 distributed separately before glibc 2.17).
200 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
201 On configurations that support it (all Linux configurations), it's now
202 used regardless of the --enable-add-ons switch to configure. It is no
203 longer possible to build such configurations without pthreads support.
205 * Locale names, including those obtained from environment variables (LANG
206 and the LC_* variables), are more tightly checked for proper syntax.
207 setlocale will now fail (with EINVAL) for locale names that are overly
208 long, contain slashes without starting with a slash, or contain ".." path
209 components. (CVE-2014-0475) Previously, some valid locale names were
210 silently replaced with the "C" locale when running in AT_SECURE mode
211 (e.g., in a SUID program). This is no longer necessary because of the
214 * On x86-64, the dynamic linker's lazy-binding support is now compatible
215 with application code using Intel MPX instructions. (With all previous
216 versions, the MPX register state could be clobbered when making calls
217 into or out of a shared library.) Note that while the new dynamic
218 linker is compatible with all known x86 hardware whether or not it
219 supports Intel MPX, some x86 instruction-set emulators might fail to
220 handle the new instruction encodings. This is known to affect Valgrind
221 versions up through 3.9 (but will be fixed in the forthcoming 3.10
222 release), and might affect other tools that do instruction emulation.
224 * Support for loadable gconv transliteration modules has been removed.
225 The support for transliteration modules has been non-functional for
226 over a decade, and the removal is prompted by security defects. The
227 normal gconv conversion modules are still supported. Transliteration
228 with //TRANSLIT is still possible, and the //IGNORE specifier
229 continues to be supported. (CVE-2014-5119)
231 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
232 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
233 resulting a denial-of-service security vulnerability in applications which
234 use functions related to iconv. (CVE-2014-6040)
238 * The following bugs are resolved with this release:
240 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
241 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
242 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
243 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
244 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
245 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
246 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
247 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
248 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
249 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
250 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
251 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
252 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
253 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
254 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
255 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
256 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
257 16431, 16453, 16474, 16506, 16510, 16529
259 * Slovenian translations for glibc messages have been contributed by the
260 Translation Project's Slovenian team of translators.
262 * The public headers no longer use __unused nor __block. This change is to
263 support compiling programs that are derived from BSD sources and use
264 __unused internally, and to support compiling with Clang's -fblock
265 extension which uses __block.
267 * CVE-2012-4412 The strcoll implementation caches indices and rules for
268 large collation sequences to optimize multiple passes. This cache
269 computation may overflow for large collation sequences and may cause a
270 stack or buffer overflow. This is now fixed to use a slower algorithm
271 which does not use a cache if there is an integer overflow.
273 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
274 rules for large collation sequences to optimize multiple passes and falls
275 back to alloca if malloc fails, resulting in a possible stack overflow.
276 The implementation now falls back to an uncached collation sequence lookup
279 * CVE-2013-4788 The pointer guard used for pointer mangling was not
280 initialized for static applications resulting in the security feature
281 being disabled. The pointer guard is now correctly initialized to a
282 random value for static applications. Existing static applications need
283 to be recompiled to take advantage of the fix (bug 15754).
285 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
286 to the d_name member of struct dirent, or omit the terminating NUL
287 character. (Bugzilla #14699).
289 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
290 aligned_alloc functions could allocate too few bytes or corrupt the
291 heap when passed very large allocation size values (Bugzilla #15855,
294 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
295 for AF_INET6 has been fixed (Bugzilla #16072).
297 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
298 pap_CW, quz_PE, the_NP.
300 * Substantially revised locales: gd_GB, ht_HT
302 * The LC_ADDRESS field was updated to support country_car for almost all
305 * ISO 1427 definitions were updated.
307 * ISO 3166 definitions were updated.
309 * The localedef utility now supports --big-endian and --little-endian
310 command-line options to generate locales for a different system from that
311 for which the C library was built.
313 * Binary locale files now only depend on the endianness of the system for
314 which they are generated and not on other properties of that system. As a
315 consequence, binary files generated with new localedef may be incompatible
316 with old versions of the GNU C Library, and binary files generated with
317 old localedef may be incompatible with this version of the GNU C Library,
318 in the following circumstances:
320 + Locale files may be incompatible on m68k systems.
322 + Locale archive files (but not separate files for individual locales) may
323 be incompatible on systems where plain "char" is signed.
325 * The configure option --disable-versioning has been removed. Builds with
326 --disable-versioning had not worked for several years.
328 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
329 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
331 * SystemTap probes for malloc have been introduced.
333 * SystemTap probes for slow multiple precision fallback paths of
334 transcendental functions have been introduced.
336 * Support for powerpc64le has been added.
338 * The soft-float powerpc port now supports e500 processors.
340 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
342 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
343 set of header declarations that are enabled by default, even when other
344 feature test macros or compiler options such as -std=c99 would otherwise
345 disable some of those declarations.
347 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
348 conflict with POSIX. The libbsd-compat library (which was a dummy library
349 that did nothing) has also been removed.
351 * Preliminary documentation about Multi-Thread, Async-Signal and
352 Async-Cancel Safety has been added.
354 * Change of ABI data structures for s390 and s390x:
355 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
356 allow for future hardware extensions. All library functions that accept or
357 return these structures were versioned in order to provide backwards
358 compatibility with existing code. However, not all cases can be handled
359 with interface versioning. If an application embeds either structure into
360 another structure and that structure is passed to another compilation unit
361 which expects the newer larger-sized object then any access to the new
362 fields will result in undefined behaviour. Similarly any access to fields
363 that were moved by the enlarging of the structures will cause undefined
364 behaviour. To fix the undefined behaviour all objects that are part of the
365 final in-memory image must agree on the size of structures, and this may
366 require recompilation.
370 * The following bugs are resolved with this release:
372 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
373 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
374 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
375 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
376 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
377 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
378 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
379 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
380 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
381 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
382 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
383 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
384 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
387 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
388 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
389 Distributions can re-enable building and using pt_chown via the new configure
390 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
391 considerable security risks and should only be used if the distribution
392 understands and accepts the risks.
394 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
397 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
398 fixed (Bugzilla #15330).
400 * Add support for calling C++11 thread_local object destructors on thread
401 and program exit. This needs compiler support for offloading C++11
402 destructor calls to glibc.
404 * Improved worst case performance of libm functions with double inputs and
407 * Support for priority inherited mutexes in pthread condition variables on
408 non-x86 architectures.
410 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
412 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
414 * Optimized string functions for ARM. Implemented by Will Newton and
417 * Optimized libm functions for SPARC. Implemented by David S. Miller.
419 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
422 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
423 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
425 * Added a benchmark framework to track performance of functions in glibc.
427 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
428 It is based on draft TS 18661 and currently enabled as a GNU extension.
430 * On Linux, the clock function now uses the clock_gettime system call
431 for improved precision, rather than old times system call.
433 * Added support for version-3 tz format files. This is needed when using
434 the tz database release 2013e or later, and affects a few unusual cases --
435 currently only TZ='America/Godthab' for time stamps after 2037.
437 * Added new API functions pthread_getattr_default_np and
438 pthread_setattr_default_np to get and set the default pthread
439 attributes of a process.
441 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
442 This may improve lock scaling of existing programs on TSX capable systems.
443 When the --enable-lock-elision=yes parameter is specified at configure
444 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
447 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
448 availability). Implemented by Ryan S. Arnold.
450 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
454 * The following bugs are resolved with this release:
456 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
457 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
458 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
459 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
460 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
461 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
462 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
463 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
464 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
465 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
466 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
467 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
468 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
469 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
470 14879, 14889, 14893, 14898, 14914.
472 * Optimization of memcpy for MIPS.
474 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
475 EMFILE has been fixed (Bugzilla #14889).
477 * The add-on ports collection is now distributed in the "ports" subdirectory
478 of the main GNU C Library distribution, rather than separately.
480 * Port to ARM AArch64 contributed by Linaro.
482 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
483 Optimized versions of memcpy, memset, and memcmp added for System z10 and
485 Implemented by Andreas Krebbel.
487 * The new function secure_getenv allows secure access to the environment,
488 returning NULL if running in a SUID/SGID process. This function replaces
489 the internal function __secure_getenv.
491 * SystemTap static probes have been added into the dynamic linker.
492 Implemented by Gary Benson.
494 * Optimizations of string functions strstr, strcasestr and memmem.
495 Implemented by Maxim Kuvyrkov.
497 * The minimum Linux kernel version that this version of the GNU C Library
498 can be used with is 2.6.16.
500 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
501 powerpc POWER7. Implemented by Will Schmidt.
503 * New configure option --disable-nscd builds the C library such that it
504 never attempts to contact the Name Service Caching Daemon (nscd).
505 New configure option --disable-build-nscd avoids building nscd itself;
506 this is the default if --disable-nscd is used.
508 * Improved support for cross-compilation, including cross-testing and
509 bootstrap builds without a previously built glibc.
511 * Several testsuite tests are now able to test multiple IFUNC variants of an
512 interface, rather than just testing the one that would be chooen by
515 * New configure options --with-bugurl and --with-pkgversion, for
516 distributors to use to embed their bug-reporting and package version
517 information in --help and --version output.
519 * The ttyname and ttyname_r functions on Linux now fall back to searching for
520 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
521 allows creation of chroots without the procfs mounted on /proc.
523 * The `crypt' function now fails if passed salt bytes that violate the
524 specification for those values. On Linux, the `crypt' function will
525 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
526 enabled, and fail on encrypted strings using the MD5 or DES algorithm
527 when the mode is enabled.
529 * The `clock_*' suite of functions (declared in <time.h>) is now available
530 directly in the main C library. Previously it was necessary to link with
531 -lrt to use these functions. This change has the effect that a
532 single-threaded program that uses a function such as `clock_gettime' (and
533 is not linked with -lrt) will no longer implicitly load the pthreads
534 library at runtime and so will not suffer the overheads associated with
535 multi-thread support in other code such as the C++ runtime library.
537 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
542 * The following bugs are resolved with this release:
544 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
545 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
546 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
547 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
548 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
549 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
550 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
551 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
552 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
553 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
554 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
555 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
556 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
557 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
558 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
559 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
560 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
561 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
562 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
563 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
564 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
565 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
568 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
569 configuring glibc with:
570 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
571 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
572 Implemented by H.J. Lu.
576 + define static_assert
578 + do not declare gets
580 + declare at_quick_exit and quick_exit also for ISO C11
582 + aligned_alloc. NB: The code is deliberately allows the size parameter
583 to not be a multiple of the alignment. This is a moronic requirement
584 in the standard but it is only a requirement on the caller, not the
589 + uchar.h support added
591 + CMPLX, CMPLXF, CMPLXL added
593 Implemented by Ulrich Drepper.
595 * Support for the IA-64 has been moved to ports.
597 * Remove support for anything but ELF binary format
599 * Checking versions of poll, ppoll added.
600 Implemented by Ulrich Drepper.
602 * More generic and 64-bit performance optimizations to math functions.
603 Implemented by Ulrich Drepper.
605 * New configure option --enable-obsolete-rpc makes the deprecated RPC
606 headers and functions available at compile time as they were before
607 version 2.14. This option will be removed at some time in the future
608 after the TI-RPC library becomes fully sufficient for the needs of
609 existing applications.
611 * Compatibility code for Linux kernel versions before 2.4 has been removed.
612 Note that glibc is not expected to work with any Linux kernel version
615 * New header <sys/auxv.h> and function getauxval allowing easy access to
616 the AT_* key-value pairs passed from the Linux kernel. The header also
617 defines the HWCAP_* bits associated with the AT_HWCAP key.
619 * New locales: mag_IN
621 * New configure option --enable-systemtap builds SystemTap static probes
622 into libc for setjmp and longjmp and into libpthread for various operations.
623 So far the setjmp/longjmp probes and some of the libpthread probes are
624 provided only for i*86 and x86_64.
625 Implemented by Roland McGrath and Rayson Ho.
627 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
629 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
632 * More optimized functions for SPARC. Implemented by David S. Miller.
634 * Improved support for cross-compilation, especially bootstrap builds
635 without a previously built glibc.
637 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
638 Chris Metcalf from Tilera.
640 * Support for the old ARM ABI has been removed from ports. Only the EABI is
641 now supported for ARM processors.
643 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
644 as the name of the dynamic linker, to distinguish it from the
645 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
647 * Support for CRIS has been removed from ports.
649 * A new class of installed header has been documented for low-level
650 platform-specific functionality. PowerPC added the first instance with a
651 function to provide time base register access. Contributed by Tulio
652 Magno Quites Machado Filho.
654 * ix86 configurations now install header files that are consistent with
655 what x86-64 configurations install. These same header files can be used
656 for -m32, -m64, or -mx32 builds.
657 Contributed by H.J. Lu.
659 * Math library bug fixes. A thorough audit of all open math library bugs was
660 conducted by Joseph Myers. Significant progress was made on many math
661 library bugs resulting in more accurate exceptions and function results.
662 Many thanks to all those that contributed including Andreas Jaeger for his
663 patch review and work on the x87 trigonometric instruction issues.
665 * Timezone data is no longer installed. Timezone-related binaries and scripts
666 will continue to be installed. Users should obtain their timezone data from
667 their distribution provider or from the tzdata package at
668 <ftp://munnari.oz.au/pub/>.
672 * The following bugs are resolved with this release:
674 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
675 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
676 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
677 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
678 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
679 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
680 13484, 13506, 13515, 13523, 13524, 13538, 13540
682 * New program pldd to list loaded object of a process
683 Implemented by Ulrich Drepper.
685 * Add nss_db support back to glibc. No more dependency on Berkeley db
686 and support for initgroups lookups.
687 Implemented by Ulrich Drepper.
689 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
690 Contributed by HJ Lu.
692 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
693 Contributed by HJ Lu.
695 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
696 on x86-32 and x86-64.
697 Contributed by Liubov Dmitrieva.
699 * Optimized strchr and strrchr for SSE on x86-32.
700 Contributed by Liubov Dmitrieva.
702 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
703 for x86-64 and x86-32.
704 Contributed by Liubov Dmitrieva.
706 * New interfaces: scandirat, scandirat64
707 Implemented by Ulrich Drepper.
709 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
710 Implemented by Ulrich Drepper.
712 * nscd now also caches the netgroup database.
713 Implemented by Ulrich Drepper.
715 * Integrate libm with gcc's -ffinite-math-only option.
716 Implemented by Ulrich Drepper.
718 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
719 to math functions. Implemented by Ulrich Drepper.
721 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
722 Implemented by Ulrich Drepper.
724 * New Linux interfaces: process_vm_readv, process_vm_writev
726 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
727 Implemented by Ulrich Drepper.
729 * Optimized nearbyint and strcasecmp for PPC.
730 Implemented by Adhemerval Zanella.
732 * New locales: bho_IN, unm_US, es_CU, ta_LK
736 * The following bugs are resolved with this release:
738 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
739 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
740 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
741 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
742 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
743 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
744 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
745 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
746 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
747 12795, 12811, 12813, 12814, 12841
749 * The RPC implementation in libc is obsoleted. Old programs keep working
750 but new programs cannot be linked with the routines in libc anymore.
751 Programs in need of RPC functionality must be linked against TI-RPC.
752 The TI-RPC implementation is IPv6 enabled and there are other benefits.
754 Visible changes of this change include (obviously) the inability to link
755 programs using RPC functions without referencing the TI-RPC library and the
756 removal of the RPC headers from the glibc headers.
757 Implemented by Ulrich Drepper.
759 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
760 syncfs, setns, sendmmsg
762 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
763 yue_HK, lij_IT, mhr_RU
765 * New encodings: CP770, CP771, CP772, CP773, CP774
767 * New program sotruss to trace calls through PLTs
768 Implemented by Ulrich Drepper.
770 * The malloc hook implementation is marked deprecated and will be removed
771 from the default implementation in the next version. The design never
772 worked ever since the introduction of threads. Even programs which do
773 not create threads themselves can use multiple threads created internally.
777 * The following bugs are resolved with this release:
779 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
780 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
781 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
782 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
785 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
787 * POWER7 optimizations: memset, memcmp, strncmp
789 * New optimized string functions for x86-64: strnlen (SSE2),
790 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
791 Implemented by Ulrich Drepper.
795 * The following bugs are resolved with this release:
797 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
798 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
799 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
800 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
801 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
802 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
803 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
804 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
806 * New interfaces: pthread_getname_np, pthread_setname_np
808 * New Linux interface: recvmmsg
810 * STT_GNU_IFUNC implemented for Sparc by David Miller.
812 * The dynamic linker now recognizes supported ABI versions from the
813 EI_ABIVERSION field in the ELF header.
814 Implemented by Ulrich Drepper.
816 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
817 will not be used to fill in password fields in the passwd.byname replies.
818 Instead it is used to synthesize the shadow.byname table, should it be
819 missing. This is a useful mode in some installations involving Solaris.
820 Implemented by Ulrich Drepper.
822 * New locales: kok_IN, sq_MK, cv_RU
826 * The following bugs are resolved with this release:
828 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
829 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
830 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
831 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
832 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
833 10789, 10817, 10823, 10840, 10847
835 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
837 Implemented by Ulrich Drepper.
839 * Checking version of longjmp added that fails if an uninitialized stack
840 frame would be created. Implemented by Ulrich Drepper.
842 * STT_GNU_IFUNC is now supported in static executables.
843 Implemented by H.J. Lu.
845 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
847 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
848 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
849 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
850 Contributed by H.J. Lu.
852 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
853 Implemented by Ulrich Drepper.
855 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
857 Contributed by H.J. Lu.
859 * Support for fma instruction in AVX on x86-64.
860 Implemented by H.J. Lu and Ulrich Drepper.
862 * AVX support in x86-64 auditing support in ld.so.
863 Implemented by H.J. Lu.
865 * STB_GNU_UNIQUE support added.
866 Implemented by Ulrich Drepper.
868 * Implement second fallback mode for optimized DNS lookup for even more
869 broken environments. If two requests from the same port are not
870 handled correctly close the socket and open a new one before sending
871 the second request. The 'single-request-reopen' option in /etc/resolv.conf
872 can be used to select this mode right away, instead of rediscovering the
873 necessity is every process again.
874 Implemented by Ulrich Drepper.
876 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
877 Implemented by Adam Tkac.
879 * Optimized iconv conversions for S390x.
880 Implemented by Andreas Krebbel.
882 * Using condvars with PI mutexes is now more efficient due to kernel
883 support for requeueing to PI futexes. NPTL support added for x86-64.
884 Implemented by Ulrich Drepper.
886 * New locales: ps_AF, my_MM
890 * The following bugs are resolved with this release:
892 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
893 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
894 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
895 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
896 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
898 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
899 Implemented by Ulrich Drepper.
901 * New Linux interfaces: accept4, fallocate, fallocate64.
902 Implemented by Ulrich Drepper.
904 * Correct declarations of string function when used in C++ code. This
905 could lead to compile errors for invalid C++ code.
907 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
910 * New POSIX 2008 interface: psiginfo
911 Implemented by Ulrich Drepper.
913 * New ISO C++1x interfaces: quick_exit, at_quick_exit
914 Implemented by Ulrich Drepper.
916 * Support for selecting between multiple function definitions at runtime
917 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
919 * The libcrypt library can now use the hash function implementations in
920 NSS. Implemented by Ulrich Drepper.
922 * The malloc implementation can be compiled to be less memory efficient
923 but higher performing in multi-threaded programs.
924 Implemented by Ulrich Drepper.
926 * New locales: nan_TW@latin, ks_IN
928 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
929 Implemented by Ulrich Drepper.
931 * Extended printf hook support. It is possible to use user-defined types
932 and extend existing format specifiers.
933 Implemented by Ulrich Drepper.
935 * Handling for group shadow files has been added.
936 Implemented by Ulrich Drepper.
938 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
939 servers (the case, e.g., for some people using the built-in DNS
940 server in ADSL modems/routers). There is a once-per-process timeout
941 in case of a broken server. To avoid it, users can run nscd or put
942 'options single-request' in /etc/resolv.conf.
943 Implemented by Ulrich Drepper.
947 * The following bugs are resolved with this release:
949 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
950 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
951 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
952 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
953 6968, 6974, 6980, 6995, 7008, 7009, 7029
955 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
956 up at the same time. Implemented by Ulrich Drepper.
958 * TLS descriptors for LD and GD on x86 and x86-64.
959 Implemented by Alexandre Oliva.
961 * getaddrinfo now handles DCCP and UDPlite.
962 Implemented by Ulrich Drepper.
964 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
965 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
966 Implemented by Ulrich Drepper.
968 * New implementation of memmem, strstr, and strcasestr which is O(n).
969 Implemented by Eric Blake.
971 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
973 * Implement "e" option for popen to open file descriptor with the
974 close-on-exec flag set. Implemented by Ulrich Drepper.
976 * Implement "b" mode for fmemopen. In this mode writes writes don't
977 implicitly add a NUL byte and seeks from the end of the buffer really
978 use the buffer end, not the string length as the basis.
979 Implemented by Ulrich Drepper.
981 * Many functions, exported and internal, now atomically set the close-on-exec
982 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
984 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
986 Implemented by Pravin Satpute.
988 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
992 * The following bugs are resolved with this release:
994 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
995 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
996 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
997 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
998 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
999 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1000 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1002 * New locales: bo_CN, bo_IN, shs_CA.
1004 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1006 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1007 Implemented by Pravin Satpute.
1009 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1011 * nscd caches now all timeouts for DNS entries
1012 Implemented by Ulrich Drepper.
1014 * nscd is more efficient and wakes up less often.
1015 Implemented by Ulrich Drepper.
1017 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1018 vdprintf, and obstack_vprintf.
1019 Implemented by Jakub Jelinek.
1021 * Faster memset for x86-64.
1022 Implemented by Harsha Jagasia and H.J. Lu.
1024 * Faster memcpy on x86.
1025 Implemented by Ulrich Drepper.
1027 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1028 Implemented by Ulrich Drepper.
1030 * Faster sqrt and sqrtf implemention for some PPC variants.
1031 Implemented by Steven Munroe.
1035 * The following bugs are resolved with this release:
1037 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1038 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1039 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1040 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1041 5071, 5103, 5104, 5112, 5113, 5184, 5186
1043 * More checking functions: fread, fread_unlocked, open*, mq_open.
1044 Implemented by Jakub Jelinek and Ulrich Drepper.
1046 * Extend fortification to C++. Implemented by Jakub Jelinek.
1048 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1049 by not recognizing 'a' as a modifier when those specs are requested.
1050 Implemented by Jakub Jelinek.
1052 * PPC optimizations to math and string functions.
1053 Implemented by Steven Munroe.
1055 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1056 options to be passed. Implemented by Ulrich Drepper.
1058 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1060 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1061 Implemented by Ulrich Drepper.
1063 * Handle private futexes in the NPTL implementation.
1064 Implemented by Jakub Jelinek and Ulrich Drepper.
1066 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1067 Implemented by Roland McGrath and Ulrich Drepper.
1069 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1071 * SHA-256 and SHA-512 based password encryption.
1072 Implemented by Ulrich Drepper.
1074 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1075 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1078 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1079 Implemented by Ulrich Drepper.
1083 * The following bugs are resolved with this release:
1085 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1086 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1087 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1088 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1089 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1090 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1091 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1094 * New Linux interfaces: epoll_pwait, sched_getcpu.
1096 * New generic interfaces: strerror_l.
1098 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1102 * The following bugs are resolved with this release:
1104 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1105 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1106 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1107 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1108 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1109 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1110 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1111 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1112 3225, 3251, 3252, 3253, 3273
1114 * For Linux, the sorting of addresses returned by getaddrinfo now also
1115 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1116 Implemented by Ulrich Drepper.
1118 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1119 Implemented by Ulrich Drepper.
1121 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1123 * New iconv module for MIK. Contributed by Alexander Shopov.
1125 * For sites with broken group and/or passwd database, the auto-propagate
1126 option of nscd can prevent creating ID lookup entries from the results
1127 of a name lookup and vice versa. This usually is no problem but some
1128 site might have problems with the default behavior.
1129 Implemented by Ulrich Drepper.
1131 * Iterating over entire database in NIS can be slow. With the
1132 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1133 to trade time for memory. The entire database will be read at once.
1134 Implemented by Ulrich Drepper.
1136 * The interfaces introduced in RFC 3542 have been implemented by
1139 * Support for the new ELF hash table format was added by Ulrich Drepper.
1141 * Support for priority inheritance mutexes added by Jakub Jelinek and
1144 * Support for priority protected mutexes added by Jakub Jelinek.
1146 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1147 or_IN, csb_PL, fy_NL, sr_ME.
1151 * More overflow detection functions.
1153 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1154 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1156 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1157 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1158 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1159 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1160 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1161 by Masahide Washizawa.
1163 * It is now possible to install audit libraries for the dynamic linker using
1164 LD_AUDIT. Implemented by Ulrich Drepper.
1166 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1167 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1168 For a libc and libpthread that works well on Linux 2.4 kernels, we
1169 recommend using the stable 2.3 branch.
1171 * The new function open_wmemstream acts like open_memstream,
1172 but uses a wchar_t wide character buffer.
1174 * The new function ppoll is an improved version of poll, similar to pselect.
1176 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1177 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1178 renameat, unlinkat, linkat, symlinkat, readlinkat.
1180 * New Linux kernel system calls: unshare,
1181 inotify_init, inotify_add_watch, inotify_rm_watch.
1183 * The euidaccess function is now also known by the alias eaccess,
1184 for compatibility with some other systems.
1186 * Timezone data updated to 2006b version.
1190 * The following bugs are resolved with this release:
1192 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1193 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1194 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1195 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1196 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1197 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1199 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1201 * As of this release, GCC 4 can be used to compile the C Library.
1203 * Timezone data updated to 2005m version.
1207 * The following bugs are resolved with this release:
1209 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1210 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1211 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1212 777, 787, 821, 822, 823, 825
1214 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1218 * Support for RFC 3678. Real implementations exist only for Linux so far.
1219 Implemented by Ulrich Drepper.
1221 * nscd can now cache entries persistently. Expiring entries are reloaded.
1222 For speedups the cache can be shared in memory with client processes.
1223 Implemented by Ulrich Drepper.
1225 * nscd can now perform SELinux checks.
1226 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1228 * getaddrinfo queries are now cached. Canonical name lookup is performed
1230 Implemented by Ulrich Drepper.
1232 * The nothrow function attribute is used when headers are used by gcc when
1233 compiling C code. This can avoid significant amounts of exception
1236 * The malloc functions perform more error checking and are stricter when
1237 it comes to reacting on errors. The default action is to terminate
1238 the process after showing an error message. Implemented by Ulrich Drepper.
1240 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1241 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1243 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1244 namespaces using the new function dlmopen(). This feature is of course,
1245 like most other dynamic loading functionality, not available in statically
1246 linked applications. Implemented by Ulrich Drepper.
1248 * Low-overhead boundary checking variants of string and some stdio functions
1249 were added. These are to be used in conjunction with a gcc patch by
1250 Jakub Jelinek which adds calls to these functions if possible.
1251 Implemented by Jakub Jelinek and Ulrich Drepper.
1253 * Old code for several operating systems and machine architectures that
1254 have not been in working condition in a long time have been removed from
1255 the main source tree maintained by the GNU C Library's maintainers.
1256 These files are now reside in the separate `ports' source module
1257 that is usable as an add-on when building the library.
1261 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1262 interrogate the dynamic linker, compatible with the Solaris interface.
1264 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1265 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1267 * getifaddrs now uses the netlink interface on Linux to get its information.
1268 Implemented by Thorsten Kukuk.
1270 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1271 Implemented by Ulrich Drepper.
1273 * support for non-executable stacks on x86 has been added. Changes mostly
1276 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1279 * getaddrinfo now performs destination address selection according to
1284 * Thread-safe interfaces for many functions that access locale data
1285 were added in version 2.3, but these features were omitted from NEWS.
1286 Many functions have variants with an `_l' suffix that take a `locale_t'
1287 object as a parameter rather than consulting the current locale.
1288 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1289 create and maintain `locale_t' objects. Additionally, the new function
1290 `uselocale' sets "the current locale" (as used by functions not so
1291 parameterized) set for an individual thread. These features were added
1292 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1294 * The functions getresuid, getresgid, setresuid, and setresgid, which
1295 have long been available on Linux, are now declared in <unistd.h>
1296 and are now also available on the Hurd.
1298 * ELF thread-local storage support (TLS) now works on x86-64.
1300 * The new dynamic string token $LIB is expanded in shared library names.
1301 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1303 * Aldy Hernandez contributed complete software floating point support for
1304 PowerPC machines with no FPU.
1306 * fexecve is implemented on Linux.
1308 * The `btowc' function should work at least twice as fast due to
1309 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1311 * With approriate thread add-ons cancelable functions are now implemented
1312 in libc.so as well. No need to call the function in libpthread. This
1313 change allowed to finally disable the incorrect and expensive handling
1314 of weak definition in ld.so.
1316 * Yet more PLT entries in libc.so have been removed. We finally arrived
1317 at the bare minimum. Startup times improved appropriately.
1319 * Support for the new Linux/x86 system call interface was added. The
1320 AT_SYSINFO auxiliary vector entry is recognized and handled.
1324 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1327 * iconv (the program and the interface) now accepts empty names (excluding
1328 options like //TRANSLIT) to mean "use charset of current locale".
1330 * localedef can now transliterate characters in strings which are not in
1331 the provided charmap. The information from the input locale is used.
1333 * Prelinking support was added for ELF targets. This requires additional
1334 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1336 * Read-only stdio streams now use mmap to speed up operation by eliminating
1337 copying and buffer underflows. To use add 'm' to the mode string of
1338 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1340 * The malloc functions were completely rewritten by Wolfram Gloger based
1341 on Doug Lea's malloc-2.7.0.c.
1343 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1344 implementation of regex.
1346 * Bruno Haible upgraded the iconv and locale implementation to support
1349 * Contents of the LC_* and LANG environment variables in the CEN style are
1350 not recognized anymore. It never was used. Change by Ulrich Drepper.
1352 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1353 thread-local storage (TLS) ABI on some platforms.
1354 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1356 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1357 EUC-JISX0213, and TSCII.
1359 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1360 BSD-compatible interface for getting all network interface addresses.
1361 Implementation for IPv4 by Roland McGrath.
1363 * Loading of locale data is faster due to the introduction of a locale
1364 archive. Implemented by Roland McGrath and Ulrich Drepper.
1366 * Startup times are significantly reduced by not using exported functions
1367 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1370 * Steven Munroe contributed a port to PowerPC64/Linux.
1374 * The Hurd now uses the GNU libio implementation of stdio rather than the
1375 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1377 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1378 with the same behavior as the Linux system call of the same name.
1382 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1383 128-bit long double format.
1385 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1386 IBM1161, and IBM1162 charsets.
1388 * Andreas Jaeger contributed a port to x86-64/Linux.
1390 * Peter Bruin contributed a port to PowerPC/Hurd.
1392 * libc functions using I/O streams now can handle wide-oriented streams
1395 * optimizations in the dynamic linker. Binaries created by recent binutils
1396 versions start up quicker due to reduced time spent on relocations.
1398 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1402 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1403 asinh, atanh, j0 for the 128-bit long double format.
1405 * Bruno Haible updated all the code handling Unicode in some form to
1406 support Unicode 3.1.
1408 * Speed of regex for single-byte locales is back to previous levels.
1409 Patch by Isamu Hasegawa.
1411 * Alpha, SPARC, and IA-64 now also using floating stacks.
1413 * Startup time of internationalized applications greatly improved through
1414 iconv cache. Use iconvconfig to generate the cache file.
1415 Contributed by Ulrich Drepper.
1417 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1418 severe performance problems. Patch by David Mosberger.
1420 * The Hurd port got a lot more functionality like AIO, various stdio
1421 extensions, etc. Mainly done by Roland McGrath.
1423 * mtrace can now lookup symbols in shared libraries.
1427 * Intel's IA-64 math library is largely integrated. It provides fast and
1428 accurate implementatations for most basic and standard math functions
1429 in float, double, and long double format.
1431 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1432 and asin for the 96-bit long double format and asin, log, tan for the
1433 128-bit long double format.
1435 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1436 The basic double functions exist today. Contributed by Abraham Ziv
1437 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1438 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1440 * An asynchronous name lookup library was added. The interface is designed
1441 after POSIX AIO. The proposal was circulated beforehand to get comments.
1442 No negative ones came in. Implemented by Ulrich Drepper.
1444 * Port to S390/64bit contributed by Martin Schwidefsky
1445 <schwidefsky@de.ibm.com>.
1447 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1448 of functions for Linux/IA-64.
1450 * The RPC code is now thread safe. Threads can now use the same service
1451 of different services at the same time. Patch by Eric Norum
1452 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1454 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1455 family of functions for Linux/S390.
1457 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1458 of functions for Linux/x86.
1460 * Port to Linux/CRIS contributed by Axis Communications.
1464 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1465 we can now check for namespace violations and missing declarations. The
1466 result is that almost all headers are now Unix-compliant (as defined in
1467 the upcoming XPG6). The negative side is that some programs might need
1468 corrections, too, if they depend on the incorrect form of the headers in
1469 previous versions which defined too many symbols and included too many
1472 * regex now handles multibyte character sets correctly.
1473 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1475 * iconv (the program) does now conform to the upcoming XPG6 and handles
1476 charmaps. Instead of the charset names the path of charmaps can be
1477 provided and the conversion happens based on this data.
1478 Contributed by Ulrich Drepper.
1480 * The locale program now provides detailed information about the installed
1485 only lists the names of the supported locales
1489 provides details such as country, language, and codeset name.
1490 Contributed by Ulrich Drepper.
1494 * The gencat program now parses the input file according to the charset
1495 selected by the LC_CTYPE category. This is important for stateful
1496 character sets. To make generating catalogs easier there is a way
1497 to overwrite the charset selected by the locale: before the first
1498 message or $ quote line the catalog can contain a line like
1500 $ codeset=ISO-8859-2
1502 to select the charset (ISO-8859-2 in this case).
1504 Implemented by Shinya Hanataka and Ulrich Drepper.
1506 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1507 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1508 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1510 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1511 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1513 * The LANGUAGE environment variable is now ignored unless the locale is
1514 changed from the default "C" locale.
1516 * The usual bug fixes.
1520 * Greg McGary added runtime support for bounds checking using gcc's
1521 new -fbounded-pointers option. ix86 target is complete. PowerPC
1524 * Thorsten Kukuk added secure mode support to nscd.
1526 * The Berkeley db libraries have been removed.
1528 Related, the nss_db module is now in a separate package since it
1529 obviously requires a database library being available.
1531 * Wide character I/O streams implemented by Ulrich Drepper.
1533 * Functions from the extended socket API added by Ulrich Drepper.
1535 * Functions feenableexcept and fedisableexcept to control the
1536 behaviour of individual exceptions have been added by Andreas Jaeger.
1538 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1540 * The resolver code has been updated from bind 8.2.3-T5B which supports
1541 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1544 This change could in some situations effect backward compatibility. Since
1545 now `_res' is a thread-local instead of a global variable, modifying it
1546 in one thread does not have any effect in other threads.
1548 The resolver library was also extended to allow IPv6 as the transport
1549 protocol for the requests. This work was done by Stig Venaas.
1551 * Compatibility code for K&R C compilers has been removed from the
1552 header files. A ISO C compiler is needed to use the library
1553 (conforming to either C89 or C99 standard).
1555 * Complete rewrite of the localedef program to support multibyte character
1556 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1557 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1558 Implemented by Ulrich Drepper.
1560 Bruno Haible significantly improved the generation and use of the data
1561 structures for the wide character tables.
1563 * Plural handling in gettext implemented by Ulrich Drepper.
1565 * The utmp daemon has been removed.
1567 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1569 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1572 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1574 * POSIX barriers implemented by Kaz Kylheku.
1576 * POSIX spawn function family implemented by Ulrich Drepper.
1578 * POSIX spinlocks are now available.
1580 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1582 * the configure option --enable-kernel=X.Y.Z allows to strip out
1583 compatibility for kernel versions before X.Y.Z. This is currently only
1584 implemented for Linux.
1586 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1587 field sin6_scope_id. This means that all programs using IPv6 should be
1588 recompiled. Don't expect binary compatibility with previous glibc
1591 * various conversion modules for IBM character sets contributed by
1594 * IA-64 port by Jes Sorensen and HJ Lu.
1608 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1610 * New xdr functions are added; some rpc functions are now 64bit clean.
1612 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1614 * Fixed known incompatibilities with glibc 2.0.
1616 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1618 * Optimized a number of functions (especially the ELF dynamic loader).
1620 * Update timezone data files.
1622 * lots of charmaps corrections
1624 * some new locale definitions and charmaps
1629 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1630 conform to POSIX member type requirements. Symbol versions have been
1631 adjusted as needed within the library, and for direct use by applications,
1632 but there is potential for problems if third-party libraries use
1633 struct timeval as part of their interface. This does not present
1634 a problem for X and other "essential" system libraries.
1636 * An additional locale model to support C++ Standard Library locale
1637 model and probably more was implemented by Ulrich Drepper.
1639 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1642 * Miles Bader provided the `argp' function family to support hierachical
1643 command line argument parsing, layered on top of getopt.
1645 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1647 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1650 * scanf recognizes the %a and %A format for scanning floating point numbers.
1652 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1653 information and interfaces for the available integer types.
1655 * about 130 new math functions were added to implement the ISO C9x math
1658 * the new header <complex.h> contains definitions of the complex math
1659 functions from ISO C 9X.
1661 * the new header <tgmath.h> defines generic macros to use complex or
1662 real valued functions.
1664 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1666 * Andreas Jaeger provided a test suite for the math library.
1668 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1670 * Ulrich Drepper added character set conversion functions (iconv).
1672 * Optimized string functions have been added.
1674 * The localedata addon is now part of glibc.
1676 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1678 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1679 daemon for NSS (nscd).
1681 Missing a better place here are some numbers on improvements. Under
1682 Linux 2.1.125 un-tar-ing the kernel sources takes
1686 using local files 12.19s 6.88s 22.91s
1688 using NIS 13.92s 8.91s 26.34s
1690 using NIS & nscd 10.37s 7.34s 25.30s
1692 using NIS+ 27.57s 30.37s 640.46s
1694 using NIS+ & nscd 10.25s 7.83s 26.51s
1696 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1698 Keep in mind that non-namelookup related operations dominate above times.
1699 It was just a common complain that using NIS+ unpacking the kernel is
1702 [1] The old nscd implementation is not available anymore since it was
1703 distributed with glibc up to version 2.0.98 and thus is now replaced.
1705 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1707 * Mark Kettenis provided a Hesiod NSS module.
1709 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1710 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1712 * rcmd can now handle netgroups (Dick Streefland).
1714 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1717 * Support for the IPv6 protocol has been added to the socket API, as per the
1718 latest draft standards.
1720 * Support for Linux 2.2 has been added.
1722 * Interface changes relative to the latest 2.0.x release:
1723 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1724 addseverity NEW: Unix98
1725 alphasort64 NEW: LFS
1726 argp_err_exit_status NEW: argp, GNU ext
1727 argp_error NEW: argp, GNU ext
1728 argp_failure NEW: argp, GNU ext
1729 argp_help NEW: argp, GNU ext
1730 argp_parse NEW: argp, GNU ext
1731 argp_program_bug_address NEW: argp, GNU ext
1732 argp_program_version NEW: argp, GNU ext
1733 argp_program_version_hook NEW: argp, GNU ext
1734 argp_state_help NEW: argp, GNU ext
1735 argp_usage NEW: argp, GNU ext
1736 authdes_create NEW: Secure RPC
1737 authdes_getucred NEW: Secure RPC
1738 authdes_pk_create NEW: Secure RPC
1739 backtrace NEW: GNU ext.
1740 backtrace_symbols NEW: GNU ext.
1741 backtrace_symbols_fd NEW: GNU ext.
1743 cacosf NEW: ISO C 9x
1744 cacosh NEW: ISO C 9x
1745 cacoshf NEW: ISO C 9x
1746 cacoshl NEW: ISO C 9x
1747 cacosl NEW: ISO C 9x
1754 casinf NEW: ISO C 9x
1755 casinh NEW: ISO C 9x
1756 casinhf NEW: ISO C 9x
1757 casinhl NEW: ISO C 9x
1758 casinl NEW: ISO C 9x
1760 catanf NEW: ISO C 9x
1761 catanh NEW: ISO C 9x
1762 catanhf NEW: ISO C 9x
1763 catanhl NEW: ISO C 9x
1764 catanl NEW: ISO C 9x
1765 cbc_crypt NEW: Secure RPC
1769 ccoshf NEW: ISO C 9x
1770 ccoshl NEW: ISO C 9x
1776 cimagf NEW: ISO C 9x
1777 cimagl NEW: ISO C 9x
1778 clearerr_locked REMOVED
1779 clntunix_create NEW: sunrpc ext
1781 clog10 NEW: ISO C 9x
1782 clog10f NEW: ISO C 9x
1783 clog10l NEW: ISO C 9x
1793 cprojf NEW: ISO C 9x
1794 cprojl NEW: ISO C 9x
1796 crealf NEW: ISO C 9x
1797 creall NEW: ISO C 9x
1802 csinhf NEW: ISO C 9x
1803 csinhl NEW: ISO C 9x
1806 csqrtf NEW: ISO C 9x
1807 csqrtl NEW: ISO C 9x
1811 ctanhf NEW: ISO C 9x
1812 ctanhl NEW: ISO C 9x
1814 des_setparity NEW: Secure RPC
1815 ecb_crypt NEW: Secure RPC
1816 endutxent NEW: Unix98
1818 exp10f NEW: ISO C 9x
1819 exp10l NEW: ISO C 9x
1823 fattach NEW: STREAMS
1824 fdetach NEW: STREAMS
1828 feclearexcept NEW: ISO C 9x
1829 fegetenv NEW: ISO C 9x
1830 fegetexceptflag NEW: ISO C 9x
1831 fegetround NEW: ISO C 9x
1832 feholdexcept NEW: ISO C 9x
1834 feraiseexcept NEW: ISO C 9x
1835 ferror_locked REMOVED
1836 fesetenv NEW: ISO C 9x
1837 fesetexceptflag NEW: ISO C 9x
1838 fesetround NEW: ISO C 9x
1839 fetestexcept NEW: ISO C 9x
1840 feupdateenv NEW: ISO C 9x
1841 fflush_locked REMOVED
1845 fgets_unlocked NEW: GNU ext.
1846 fileno_locked REMOVED
1858 fputc_locked REMOVED
1859 fputs_unlocked NEW: GNU ext.
1860 fread_unlocked NEW: GNU ext.
1865 fstatvfs NEW: Unix98
1869 ftruncate64 NEW: LFS
1871 fwrite_unlocked NEW: GNU ext.
1872 gai_strerror NEW: IPv6
1876 getchar_locked REMOVED
1878 getdate_err NEW: Unix98
1879 getdate_r NEW: GNU ext.
1881 getnameinfo NEW: IPv6
1882 getnetname NEW: Secure RPC
1883 getpmsg NEW: STREAMS
1884 getpt NEW: Unix98 PTY
1885 getrlimit64 NEW: LFS
1886 getutxent NEW: Unix98
1887 getutxid NEW: Unix98
1888 getutxline NEW: Unix98
1889 glob64 NEW: GNU ext.
1890 globfree64 NEW: GNU ext.
1891 gnu_get_libc_release NEW: GNU ext.
1892 gnu_get_libc_version NEW: GNU ext.
1893 grantpt NEW: Unix98 PTY
1894 host2netname NEW: Secure RPC
1896 iconv_close NEW: iconv
1897 iconv_open NEW: iconv
1898 if_freenameindex NEW: IPv6
1899 if_indextoname NEW: IPv6
1900 if_nameindex NEW: IPv6
1901 if_nametoindex NEW: IPv6
1902 in6addr_any NEW: IPv6
1903 in6addr_loopback NEW: IPv6
1904 inet6_isipv4mapped NEW: IPv6
1905 isastream NEW: STREAMS
1906 iswblank NEW: GNU ext.
1907 key_decryptsession NEW: Secure RPC
1908 key_decryptsession_pk NEW: Secure RPC
1909 key_encryptsession NEW: Secure RPC
1910 key_encryptsession_pk NEW: Secure RPC
1911 key_gendes NEW: Secure RPC
1912 key_get_conv NEW: Secure RPC
1913 key_secretkey_is_set NEW: Secure RPC
1914 key_setnet NEW: Secure RPC
1915 key_setsecret NEW: Secure RPC
1916 llrint NEW: ISO C 9x
1917 llrintf NEW: ISO C 9x
1918 llrintl NEW: ISO C 9x
1919 llround NEW: ISO C 9x
1920 llroundf NEW: ISO C 9x
1921 llroundl NEW: ISO C 9x
1926 lrintf NEW: ISO C 9x
1927 lrintl NEW: ISO C 9x
1928 lround NEW: ISO C 9x
1929 lroundf NEW: ISO C 9x
1930 lroundl NEW: ISO C 9x
1932 makecontext NEW: Unix98
1933 mempcpy NEW: GNU ext.
1936 modify_ldt NEW: kernel
1940 nearbyint NEW: ISO C 9x
1941 nearbyintf NEW: ISO C 9x
1942 nearbyintl NEW: ISO C 9x
1943 netname2host NEW: Secure RPC
1944 netname2user NEW: Secure RPC
1945 nexttoward NEW: ISO C 9x
1946 nexttowardf NEW: ISO C 9x
1947 nexttowardl NEW: ISO C 9x
1951 passwd2des NEW: Secure RPC
1953 pow10f NEW: GNU ext.
1954 pow10l NEW: GNU ext.
1957 printf_size NEW: GNU ext.
1958 printf_size_info NEW: GNU ext.
1959 profil_counter REMOVED
1960 pthread_mutexattr_getkind_np REPLACED
1961 pthread_mutexattr_setkind_np REPLACED
1962 ptsname NEW: Unix98 PTY
1963 ptsname_r NEW: Unix98 PTY
1965 putchar_locked REMOVED
1966 putgrent NEW: GNU ext.
1968 putpmsg NEW: STREAMS
1969 pututxline NEW: Unix98
1973 readdir64_r NEW: LFS
1974 remquo NEW: ISO C 9x
1975 remquof NEW: ISO C 9x
1976 remquol NEW: ISO C 9x
1978 roundf NEW: ISO C 9x
1979 roundl NEW: ISO C 9x
1981 scalbln NEW: ISO C 9x
1982 scalblnf NEW: ISO C 9x
1983 scalblnl NEW: ISO C 9x
1985 sendfile NEW: kernel
1986 setcontext NEW: Unix98
1987 setrlimit64 NEW: LFS
1988 setutxent NEW: Unix98
1990 sigignore NEW: Unix98
1991 sigqueue NEW: POSIX.1b
1992 sigrelse NEW: Unix98
1993 sigset NEW: POSIX.1b
1994 sigtimedwait NEW: POSIX.1b
1995 sigwaitinfo NEW: POSIX.1b
1996 sincos NEW: GNU ext.
1997 sincosf NEW: GNU ext.
1998 sincosl NEW: GNU ext.
2002 strcasestr NEW: GNU ext.
2003 strtoimax NEW: ISO C 9x
2004 strtoumax NEW: ISO C 9x
2005 strverscmp NEW: GNU ext.
2006 svcauthdes_stats NEW: Secure RPC
2007 svcunix_create NEW: sunrpc etx
2008 svcunixfd_create NEW: sunrpc ext
2009 swapcontext NEW: Unix98
2010 tcgetsid NEW: Unix98 PTY
2011 tdestroy NEW: GNU ext.
2012 tgamma NEW: ISO C 9x
2013 tgammaf NEW: ISO C 9x
2014 tgammal NEW: ISO C 9x
2018 truncf NEW: ISO C 9x
2019 truncl NEW: ISO C 9x
2021 unlockpt NEW: Unix98 PTY
2022 updwtmpx NEW: Unix98
2023 user2netname NEW: Secure RPC
2024 utmpxname NEW: Unix98
2025 versionsort NEW: GNU ext.
2026 versionsort64 NEW: GNU ext.
2028 wcscasecmp NEW: GNU ext.
2029 wcsncasecmp NEW: GNU ext.
2030 wcsnlen NEW: GNU ext.
2031 wcstoimax NEW: ISO C 9x
2032 wcstoll NEW: ISO C 9x
2033 wcstoull NEW: ISO C 9x
2034 wcstoumax NEW: ISO C 9x
2036 wordexp NEW: POSIX.2
2037 wordfree NEW: POSIX.2
2038 write_profiling REMOVED
2039 xdecrypt NEW: Secure RPC
2040 xdr_authdes_cred NEW: Secure RPC
2041 xdr_authdes_verf NEW: Secure RPC
2042 xdr_cryptkeyarg NEW: Secure RPC
2043 xdr_cryptkeyarg2 NEW: Secure RPC
2044 xdr_cryptkeyres NEW: Secure RPC
2045 xdr_getcredres NEW: Secure RPC
2046 xdr_key_netstarg NEW: Secure RPC
2047 xdr_key_netstres NEW: Secure RPC
2048 xdr_keybuf NEW: Secure RPC
2049 xdr_keystatus NEW: Secure RPC
2050 xdr_netnamestr NEW: Secure RPC
2051 xdr_sizeof NEW: Secure RPC
2052 xdr_unixcred NEW: sunrpc ext
2053 xencrypt NEW: Secure RPC
2054 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2065 * inet_ntoa is thread-safe
2067 * updwtmp is moved from libutil to libc
2069 * rewrite of cbrt function
2071 * update of timezone data
2085 * add atoll function
2087 * fix complex problems in Berkeley DB code
2089 * fix math functions
2093 * fixed lots of header problems (especially Linux/GNU specific)
2095 * dynamic loader preserves all registers
2097 * Roland McGrath provided support for handling of auxiliary objects in
2098 the ELF dynamic loader.
2100 * support for parallel builds is improved
2104 * GNU extensions are no longer declared by default. To enable them you
2105 must define the macro `_GNU_SOURCE' in your program or compile with
2108 * The library has changed from using GNU ld symbol aliases to using weak
2109 symbols where available. The ELF object file format supports weak
2110 symbols; GNU ld also supports weak symbols in the a.out format. (There
2111 is also now support for other GNU ld extensions in ELF. Use the
2112 `--with-elf' option to configure to indicate you have ELF, and
2113 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2114 of many files which contained only symbol aliases, reducing the size of
2115 the source and the compiled library; many other files were renamed to
2116 less cryptic names previously occupied by the symbol alias files.
2117 There is a new header file <elf.h> for programs which operate on
2118 files in the ELF format.
2120 * Converted to Autoconf version 2, so `configure' has more options.
2121 Run `configure --help' to see the details.
2123 * The library can now be configured to build profiling, highly-optimized
2124 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2125 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2126 `configure' enable building these extra libraries. The shared library is
2127 built by default when using both ELF and GNU ld. When shared libraries
2128 are enabled, the new library `-ldl' is available for arbitrary run-time
2129 loading of shared objects; its interface is defined in <dlfcn.h>. The
2130 new header file <link.h> gives access to the internals of the run-time
2131 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2132 application of same name on other systems and it provides information
2133 about dynamically linked binaries.
2135 * The C library now provides the run-time support code for profiling
2136 executables compiled with `-pg'. Programs can control the profiling code
2137 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2138 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2139 the support for this file format was contributed by David Mosberger-Tang.
2141 * The math code has been replaced with a math library based on fdlibm from
2142 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2143 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2144 functions. The math functions now reside in a separate library, so
2145 programs using them will need to use `-lm' their linking commands.
2147 * John C. Bowman contributed optimized ix87 assembler inline functions.
2149 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2150 mechanism similar to that found in Solaris 2. This is now used for the
2151 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2152 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2153 file controls what services are used for each individual database. This
2154 works by loading shared libraries with names specified in `nsswitch.conf',
2155 so service modules can be changed or added at any time without even
2156 relinking any program. Currently there are the file, db, and NIS based
2157 NSS services available.
2159 * The new functions `strtoq' and `strtouq' parse integer values from
2160 strings, like `strtol' and `strtoul', but they return `long long int' and
2161 `unsigned long long int' values, respectively (64-bit quantities).
2163 * The new functions `strtof' and `strtold' parse floating-point values from
2164 strings, like `strtod', but they return `float' and `long double' values,
2165 respectively (on some machines `double' and `long double' are the same).
2167 * Ulrich Drepper has contributed new implementations of the floating-point
2168 printing and reading code used in the `printf' family of functions and
2169 `strtod', `strtof', and `strtold'. These new functions are perfectly
2170 accurate, and much faster than the old ones.
2172 * The implementation of the POSIX locale model was completely rewritten by
2173 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2174 to compile the POSIX locale definition.
2176 * The former dummy implementations of the strcoll and strxfrm function are
2177 now replaced by fully functional code contributed by Ulrich Drepper. The
2178 collation information comes from the POSIX locale definitions.
2180 * The new header <langinfo.h> defines an interface for accessing
2181 various locale-dependent data (using the locale chosen with `setlocale').
2183 * Ulrich Drepper has contributed a new suite of functions for operation on
2184 wide-character and multibyte-character strings, in <wchar.h>;
2185 and classification and case conversion of wide characters, in <wctype.h>.
2186 These new functions are conforming to the ISO C, Amendement 1 specification.
2188 * There is now a second implementation of the standard I/O library available.
2189 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2190 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2192 * You can now use positional parameter specifications in format strings
2193 for the `printf' and `scanf' families of functions. For example,
2194 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2195 ``Number 6, Mr Jones''. This is mainly useful when providing different
2196 format strings for different languages, whose grammars may dictate
2197 different orderings of the values being printed. To support this
2198 feature, the interface for `register_printf_handler' has changed; see
2199 the header file <printf.h> for details.
2201 * The `printf' and `scanf' families of functions now understand a new
2202 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2203 to group numbers as indicated by the locale; for `scanf' and friends, this
2204 says to accept as valid only a number with all the proper grouping
2205 separators in the right places. In the default "C" locale, numbers are
2206 not grouped; but locales for specific countries will define the usual
2207 conventions (i.e. separate thousands with `,' in the US locale).
2209 * The pgrp functions have been regularized, slightly incompatibly but much
2210 less confusingly. The core functions are now `getpgid' and `setpgid',
2211 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2212 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2213 provided for compatibility. There is no longer an incompatible `getpgrp'
2214 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2216 * The new header file <fts.h> and suite of functions simplify programs that
2217 operate on directory trees. This code comes from 4.4 BSD.
2219 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2220 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2221 NSS scheme used in glibc.
2223 * There is a new malloc debugging hook `__memalign_hook'.
2225 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2226 `unsigned int' in <sys/types.h>. These are for compatibility only and
2227 their use is discouraged.
2229 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2230 done differently, so that it works even without GNU ld.
2232 * New function `euidaccess' checks allowed access to a file like `access',
2233 but using the effective IDs instead of the real IDs.
2235 * The time zone data files have been updated for the latest and greatest
2236 local time conventions of the countries of the world.
2238 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2241 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2242 for formatting floating-point numbers. They are provided only for
2243 compatibility; new programs should use `sprintf' instead. There are
2244 also equivalent function for the `long double' floating-point type and
2245 all functions also exist in a reentrant form.
2247 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2248 functions for maintaining the login-record files (primarily of use to
2249 system programs such as `login'), and convenient functions for
2250 allocating and initializing a pseudo-terminal (pty) device.
2252 * Ulrich Drepper has contributed new support for System V style
2253 shared memory and IPC on systems that support it.
2255 * Ulrich Drepper has contributed several miscellaneous new functions found
2256 in System V: The `hsearch' family of functions provide an effective
2257 implementation of hash tables; `a64l' and `l64a' provide a very simple
2258 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2261 * Ulrich Drepper has contributed new reentrant counterparts for the
2262 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2264 * Ulrich Drepper has contributed new, highly-optimized versions of several
2265 string functions for the i486/Pentium family of processors.
2267 * Ulrich Drepper has updated the Linux-specific code, based largely
2268 on work done in Hongjiu Lu's version of GNU libc for Linux.
2269 The GNU library now supports Linux versions 2.0.10 and later,
2270 using the ELF object file format (i[3456]86-*-linux).
2272 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2274 * David Mosberger-Tang and Richard Henderson have ported the C library
2275 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2276 dynamic linking support for ELF/Alpha.
2278 * Richard Henderson contributed several Alpha optimized assembler function
2279 for arithmetic and string handling.
2281 * Ulrich Drepper has contributed a new set of message catalog functions to
2282 support multiple languages using the <libintl.h> interface, for use with
2283 his new package GNU gettext. Translation volunteers have contributed
2284 catalogs of the library's messages in Spanish, German, and Korean.
2286 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2287 program and the `catgets' function for reading the catalog files it
2288 creates. (The <libintl.h> interface is preferred; we include the
2289 <nl_types.h> interface using `catgets' only for source compatibility with
2290 programs already written to use it.)
2292 * New header file <values.h> gives SVID-compatible names for <limits.h>
2295 * Various new macros, declarations, and small header files for compatibility
2298 * New function `group_member' is a convenient way to check if a process has
2299 a given effective group ID.
2301 * When using GCC 2.7 and later, the socket functions are now declared in a
2302 special way so that passing an argument of type `struct sockaddr_in *',
2303 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2304 `struct sockaddr *' type, does not generate a type-clash warning.
2306 * New function `error' declared in header file <error.h> is a convenient
2307 function for printing error messages and optionally exiting; this is the
2308 canonical function used in GNU programs. The new functions `err', `warn',
2309 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2310 doing the same thing.
2312 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2313 POSIX.2 `glob' function to do ~ and {...} expansion.
2315 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2316 `clearenv' which is used in POSIX.9 is also available.
2318 * New function `getsid' returns session ID number on systems that support it.
2320 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2321 files <db.h> and <mpool.h> provide a rich set of functions for several
2322 types of simple databases stored in memory and in files, and <ndbm.h> is
2323 an old `ndbm'-compatible interface using the `db' functions. Link with
2324 `-ldb' to get these functions.
2326 * New macro `strdupa' copies a string like `strdup', but uses local stack
2327 space from `alloca' instead of dynamic heap space from `malloc'.
2329 * New function `strnlen' is like `strlen' but searches only a given maximum
2330 number of characters for the null terminator. `stpncpy', `strndup' and
2331 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2334 * New function `statfs' in header <sys/statfs.h>.
2336 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2337 provide convenient functions for operating on blocks of null-terminated
2340 * A new suite of functions in <utmp.h> handle all the details of reading
2341 and writing the utmp file.
2343 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2346 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2347 completely POSIX compliant and also implemented the extended functionality
2348 to handle alternate digit representation and alternate era date formats.
2350 * Ulrich Drepper provided an implementation of the `strptime' function
2351 defined in XPG4.2 which transforms a string into a `struct tm' value.
2353 * Paul Eggert provided the tzselect shell script as part of the timezone
2354 code. The shell script makes it easy to select the correct timezone
2357 * The implementation of the malloc family of functions is completely replaced
2358 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2359 The implementation uses the mmap function (if available) and it is
2360 optimized for the use in multi threaded programs.
2362 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2363 functions. This new functionality is usable by specifying a special
2364 salt string and it is compatible with implementation on *BSD systems.
2366 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2367 `getsubopt' to handle second level command line options, `bsd_signal'
2368 to access BSD style `signal' functionality, the obsolete `regexp' style
2371 * the `lchown' function is available on system which support this
2374 * The implementation of the shadow password handling function was contributed
2377 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2379 * POSIX.1g support was added. The <sys/select.h> header is available,
2380 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2381 implementation of `getaddrinfo'.
2385 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2387 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2388 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2390 * The new function `daemon' from 4.4 BSD is useful for server programs that
2391 want to put themselves in the background.
2393 * Joel Sherrill has contributed support for several standalone boards that
2394 run without an operating system.
2396 * `printf', `scanf' and friends now accept a `q' type modifier for long
2397 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2399 * All of the code taken from BSD (notably most of the math and networking
2400 routines) has been updated from the BSD 4.4-Lite release.
2402 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2404 * The new functions `getdomainname' and `setdomainname' fetch or change the
2405 YP/NIS domain name. These are system calls which exist on systems which
2408 * The time zone data files have been updated for the latest international
2411 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2412 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2416 * The C library now includes support for Sun RPC, from Sun's free
2417 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2418 are included. (There is still no support for YP.)
2420 * Tom Quinn has contributed a port of the C library to SGI machines running
2421 Irix 4 (mips-sgi-irix4).
2423 * The new `lockf' function is a simplified interface to the locking
2424 facilities of `fcntl', included for compatibility.
2426 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2428 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2430 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2433 * The error message printed by `assert' for a failed assertion now includes
2434 the name of the program (if using GNU ld) and the name of the calling
2435 function (with versions of GCC that support this).
2437 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2439 * The library now includes the <sys/mman.h> header file and memory
2440 management functions `mmap', `munmap', `mprotect', `msync', and
2441 `madvise', on systems that support those facilities.
2443 * The interface for `mcheck' has changed slightly: the function called to
2444 abort the program when an allocation inconsistency is detected now takes
2445 an argument that indicates the type of failure. The new function
2446 `mprobe' lets you request a consistency check for a particular block at
2447 any time (checks are normally done only when you call `free' or `realloc'
2450 * It is now possible to easily cross-compile the C library, building on one
2451 system a library to run on another machine and/or operating system. All
2452 you need to do is set the variable `HOST_CC' in `configparms' to the
2453 native compiler for programs to run on the machine you are building on (a
2454 few generator programs are used on Unix systems); set `CC' to the
2457 * The new function `fexecve' (only implemented on the GNU system) executes
2458 a program file given a file descriptor already open on the file.
2462 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2463 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2465 * You can set the variable `libprefix' in `configparms' to specify a prefix
2466 to be prepended to installed library files; this makes it easy to install
2467 the GNU C library to be linked as `-lgnuc' or whatever.
2469 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2470 copies a limited number of characters from a string, and returns the
2471 address of the last character written.
2473 * You no longer need to check for whether the installed `stddef.h' is
2474 compatible with the GNU C library. configure now checks for you.
2476 * You can now define a per-stream `fileno' function to convert the
2477 stream's cookie into an integral file descriptor.
2479 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2480 allocates zero bytes of storage, and returns a unique pointer which
2481 you can pass to `realloc' or `free'. The behavior is undefined if
2482 you dereference this pointer.
2484 * The C library now runs on Sony NEWS m68k machines running either
2485 NewsOS 3 or NewsOS 4.
2487 * The new `syscall' function is a system-dependent primitive function
2488 for invoking system calls. It has the canonical behavior on Unix
2489 systems, including unreliable return values for some calls (such as
2490 `pipe', `fork' and `getppid').
2492 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2493 to `EAGAIN', which is the preferred name. On systems whose kernels
2494 use two distinct codes, the C library now translates EWOULDBLOCK to
2495 EAGAIN in every system call function.
2499 * The GNU C Library Reference Manual is now distributed with the library.
2500 `make dvi' will produce a DVI file of the printed manual.
2501 `make info' will produce Info files that you can read on line using C-h i
2502 in Emacs or the `info' program.
2503 Please send comments on the manual to bug-glibc-manual@gnu.org.
2505 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2507 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2509 * Jason Merrill has contributed a port to the Sequent Symmetry running
2510 Dynix version 3 (i386-sequent-dynix).
2512 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2513 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2515 * New function `memory_warnings' lets you arrange to get warnings when
2516 malloc is running out of memory to allocate, like Emacs gives you.
2518 * The C library now contains the relocating allocator used in Emacs 19 for
2519 its editing buffers. This allocator (ralloc) minimizes allocation
2520 overhead and fragmentation by moving allocated regions around whenever it
2521 needs to. You always refer to a ralloc'd region with a "handle" (a
2522 pointer to a pointer--an object of type `void **').
2524 * There is a new `printf' format: `%m' gives you the string corresponding
2525 to the error code in `errno'.
2527 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2528 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2529 pass, the `a' modifier says to fill in a `char **' you pass with a
2532 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2533 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2534 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2536 * `mkstemp' is a traditional Unix function to atomically create and open a
2537 uniquely-named temporary file.
2541 * The standard location for the file that says what the local timezone is
2542 has changed again. It is now `/usr/local/etc/localtime' (or more
2543 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2545 * The distribution no longer contains any files with names longer than 14
2548 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2549 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2551 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2555 * The configuration process has changed quite a bit. The `configure'
2556 script is now used just like the configuration scripts for other GNU
2557 packages. The `sysdeps' directory hierarchy is much rearranged.
2558 The file `INSTALL' explains the new scheme in detail.
2560 * The header files no longer need to be processed into ANSI C and
2561 traditional C versions. There is just one set of files to install, and
2562 it will work with ANSI or old C compilers (including `gcc -traditional').
2564 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2565 MIPS DECStation running Ultrix 4.
2567 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2568 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2569 made itself into a shared library.
2571 * Yet further improved support for the i386, running 4.3 BSD-like systems
2572 (such as Mach 3 with the Unix single-server), or System V.
2574 * New function `strncasecmp' to do case-insensitive string comparison
2575 with limited length.
2577 * New function `strsep' is a reentrant alternative to `strtok'.
2579 * New functions `scandir' and `alphasort' for searching directories.
2581 * New function `setenv' is a better interface to `putenv'.
2583 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2584 function for traversing a directory tree.
2586 * The GNU obstack package is now also part of the C library.
2587 The new function `open_obstack_stream' creates a stdio stream that
2588 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2589 formatted output directly to an obstack.
2591 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2592 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2594 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2596 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2597 things to your strings.
2599 * There are some new test programs: test-fseek, testmb, and testrand.
2601 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2602 These ports are not finished, but are a good starting place for really
2603 supporting those systems.
2605 * `/etc/localtime' is now the standard location for the file that says what
2606 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2607 This follows the general principle that `/etc' is the place for all local
2608 configuration files.
2610 * The C library header files now use `extern "C"' when used by the C++
2611 compiler, so the C library should now work with C++ code.
2613 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2614 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2617 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2618 function which uses the `merge sort' algorithm, and is said to be
2619 significantly faster than the old GNU `qsort' function. Merge sort is
2620 now the standard `qsort' function. The new algorithm can require a lot
2621 of temporary storage; so, the old sorting function is called when the
2622 required storage is not available.
2624 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2625 provides the Unix `crypt' function, plus some other entry points.
2627 * The code and header files taken from 4.4 BSD have been updated with the
2628 latest files released from Berkeley.
2630 ----------------------------------------------------------------------
2631 Copyright information:
2633 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2635 Permission is granted to anyone to make or distribute verbatim copies
2636 of this document as received, in any medium, provided that the
2637 copyright notice and this permission notice are preserved,
2638 thus giving the recipient permission to redistribute in turn.
2640 Permission is granted to distribute modified versions
2641 of this document, or of portions of it,
2642 under the above conditions, provided also that they
2643 carry prominent notices stating who last changed them.
2646 version-control: never