1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 4719, 13064, 14094, 14841, 15319, 15467, 15790, 15969, 16351, 16512,
13 16560, 16783, 17269, 17523, 17569, 17588, 17631, 17711, 17776, 17779,
14 17792, 17836, 17912, 17916, 17932, 17944, 17949, 17964, 17965, 17967,
15 17969, 17978, 17987, 17991, 17996, 17998, 17999, 18019, 18020, 18029,
16 18030, 18032, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18068,
19 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
20 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
21 Hat). These updates cause user visible changes, such as the fix for bug
27 * The following bugs are resolved with this release:
29 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
30 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
31 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
32 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
33 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
34 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
35 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
36 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
37 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
38 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
41 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
42 too little memory for the to-be-scanned arguments and overflow the
43 allocated buffer. The implementation now correctly computes the required
44 buffer size when using malloc, and switches to malloc from alloca as
47 * A new semaphore algorithm has been implemented in generic C code for all
48 machines. Previous custom assembly implementations of semaphore were
49 difficult to reason about or ensure that they were safe. The new version
50 of semaphore supports machines with 64-bit or 32-bit atomic operations.
51 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
52 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
54 * Port to Altera Nios II has been contributed by Mentor Graphics.
56 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
57 implementations for powerpc64/powerpc64le.
58 Implemented by Adhemerval Zanella (IBM).
60 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
61 and powerpc64le. This may improve lock scaling of existing programs on
62 HTM capable systems. The lock elision code is only enabled with
63 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
64 powerpc will issue a transaction abort on every syscall to avoid side
65 effects being visible outside transactions.
67 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
68 AArch64. Contributed by ARM Ltd.
70 * i386 memcpy functions optimized with SSE2 unaligned load/store.
72 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
73 under certain input conditions resulting in the execution of a shell for
74 command substitution when the application did not request it. The
75 implementation now checks WRDE_NOCMD immediately before executing the
76 shell and returns the error WRDE_CMDSUB as expected.
78 * CVE-2012-3406 printf-style functions could run into a stack overflow when
79 processing format strings with a large number of format specifiers.
81 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
82 infinite loop if the DNS response contained a PTR record of an unexpected
85 * The minimum GCC version that can be used to build this version of the GNU
86 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
87 still be used to compile programs using the GNU C Library.
89 * The GNU C Library is now built with -Werror by default. This can be
90 disabled by configuring with --disable-werror.
92 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
94 * The obsolete sigvec function has been removed. This was the original
95 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
96 programs have been using instead for about 25 years. Of course, ABI
97 compatibility for old binaries using sigvec remains intact.
99 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
100 with newer versions of bison.
102 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
103 The original MIPS o32 hard-float ABI requires an FPU where double-precision
104 registers overlay two consecutive single-precision registers. MIPS32R2
105 introduced a new FPU mode (FR=1) where double-precision registers extend the
106 corresponding single-precision registers which is incompatible with the
107 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
108 require the use of FR=1 making a transition necessary. New o32 ABI
109 extensions enable users to migrate over time from the original o32 ABI
110 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
111 tracks the ABI of any loaded object and verifies that new objects are
112 compatible. Mode transitions will also be requested as required and
113 unsupportable objects will be rejected. The ABI checks include both soft and
114 hard float ABIs for o32, n32 and n64.
116 GCC 5 with GNU binutils 2.25 onwards:
117 It is strongly recommended that all o32 system libraries are built using the
118 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
119 with the original and all new o32 ABI extensions. Configure a MIPS GCC
120 compiler using --with-fp-32=xx to set this by default.
124 * The following bugs are resolved with this release:
126 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
127 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
128 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
129 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
130 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
131 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
132 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
133 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
134 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
135 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
136 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
137 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
138 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
139 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
140 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
142 * Reverted change of ABI data structures for s390 and s390x:
143 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
144 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
145 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
146 are preserved pointing straight to the same implementation as the old ones.
147 Given that, new callers will simply provide a too-big buffer to these
148 functions. Any applications/libraries out there that embed jmp_buf or
149 ucontext_t in an ABI-relevant data structure that have already been rebuilt
150 against 2.19 headers will have to rebuilt again. This is necessary in any
151 case to revert the breakage in their ABI caused by the glibc change.
153 * Support for file description locks is added to systems running the
154 Linux kernel. The standard file locking interfaces are extended to
155 operate on file descriptions, not file descriptors, via the use of
156 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
157 are associated with an open file instead of a process.
159 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
161 * The minimum Linux kernel version that this version of the GNU C Library
162 can be used with is 2.6.32.
164 * Running the testsuite no longer terminates as soon as a test fails.
165 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
166 with PASS or FAIL lines for individual tests. A summary of the results is
167 printed, including a list of failing lists, and "make check" exits with
168 error status if there were any unexpected failures. "make check
169 stop-on-test-failure=y" may be used to keep the old behavior.
171 * The am33 port, which had not worked for several years, has been removed
174 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
175 supported; they now act the same as _DEFAULT_SOURCE (but generate a
176 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
177 conflicted with POSIX (support for which was removed in 2.19), the
178 interfaces those macros enabled remain available when compiling with
179 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
182 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
184 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
185 This may improve lock scaling of existing programs on TX capable systems.
186 The lock elision code is only built with --enable-lock-elision=yes and
187 then requires a GCC version supporting the TX builtins. With lock elision
188 default mutexes are elided via __builtin_tbegin, if the cpu supports
189 transactions. By default lock elision is not enabled and the elision code
192 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
193 copy the path argument. This allowed programs to cause posix_spawn to
194 deference a dangling pointer, or use an unexpected pathname argument if
195 the string was modified after the posix_spawn_file_actions_addopen
198 * All supported architectures now use the main glibc sysdeps directory
199 instead of some being in a separate "ports" directory (which was
200 distributed separately before glibc 2.17).
202 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
203 On configurations that support it (all Linux configurations), it's now
204 used regardless of the --enable-add-ons switch to configure. It is no
205 longer possible to build such configurations without pthreads support.
207 * Locale names, including those obtained from environment variables (LANG
208 and the LC_* variables), are more tightly checked for proper syntax.
209 setlocale will now fail (with EINVAL) for locale names that are overly
210 long, contain slashes without starting with a slash, or contain ".." path
211 components. (CVE-2014-0475) Previously, some valid locale names were
212 silently replaced with the "C" locale when running in AT_SECURE mode
213 (e.g., in a SUID program). This is no longer necessary because of the
216 * On x86-64, the dynamic linker's lazy-binding support is now compatible
217 with application code using Intel MPX instructions. (With all previous
218 versions, the MPX register state could be clobbered when making calls
219 into or out of a shared library.) Note that while the new dynamic
220 linker is compatible with all known x86 hardware whether or not it
221 supports Intel MPX, some x86 instruction-set emulators might fail to
222 handle the new instruction encodings. This is known to affect Valgrind
223 versions up through 3.9 (but will be fixed in the forthcoming 3.10
224 release), and might affect other tools that do instruction emulation.
226 * Support for loadable gconv transliteration modules has been removed.
227 The support for transliteration modules has been non-functional for
228 over a decade, and the removal is prompted by security defects. The
229 normal gconv conversion modules are still supported. Transliteration
230 with //TRANSLIT is still possible, and the //IGNORE specifier
231 continues to be supported. (CVE-2014-5119)
233 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
234 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
235 resulting a denial-of-service security vulnerability in applications which
236 use functions related to iconv. (CVE-2014-6040)
240 * The following bugs are resolved with this release:
242 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
243 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
244 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
245 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
246 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
247 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
248 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
249 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
250 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
251 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
252 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
253 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
254 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
255 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
256 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
257 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
258 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
259 16431, 16453, 16474, 16506, 16510, 16529
261 * Slovenian translations for glibc messages have been contributed by the
262 Translation Project's Slovenian team of translators.
264 * The public headers no longer use __unused nor __block. This change is to
265 support compiling programs that are derived from BSD sources and use
266 __unused internally, and to support compiling with Clang's -fblock
267 extension which uses __block.
269 * CVE-2012-4412 The strcoll implementation caches indices and rules for
270 large collation sequences to optimize multiple passes. This cache
271 computation may overflow for large collation sequences and may cause a
272 stack or buffer overflow. This is now fixed to use a slower algorithm
273 which does not use a cache if there is an integer overflow.
275 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
276 rules for large collation sequences to optimize multiple passes and falls
277 back to alloca if malloc fails, resulting in a possible stack overflow.
278 The implementation now falls back to an uncached collation sequence lookup
281 * CVE-2013-4788 The pointer guard used for pointer mangling was not
282 initialized for static applications resulting in the security feature
283 being disabled. The pointer guard is now correctly initialized to a
284 random value for static applications. Existing static applications need
285 to be recompiled to take advantage of the fix (bug 15754).
287 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
288 to the d_name member of struct dirent, or omit the terminating NUL
289 character. (Bugzilla #14699).
291 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
292 aligned_alloc functions could allocate too few bytes or corrupt the
293 heap when passed very large allocation size values (Bugzilla #15855,
296 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
297 for AF_INET6 has been fixed (Bugzilla #16072).
299 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
300 pap_CW, quz_PE, the_NP.
302 * Substantially revised locales: gd_GB, ht_HT
304 * The LC_ADDRESS field was updated to support country_car for almost all
307 * ISO 1427 definitions were updated.
309 * ISO 3166 definitions were updated.
311 * The localedef utility now supports --big-endian and --little-endian
312 command-line options to generate locales for a different system from that
313 for which the C library was built.
315 * Binary locale files now only depend on the endianness of the system for
316 which they are generated and not on other properties of that system. As a
317 consequence, binary files generated with new localedef may be incompatible
318 with old versions of the GNU C Library, and binary files generated with
319 old localedef may be incompatible with this version of the GNU C Library,
320 in the following circumstances:
322 + Locale files may be incompatible on m68k systems.
324 + Locale archive files (but not separate files for individual locales) may
325 be incompatible on systems where plain "char" is signed.
327 * The configure option --disable-versioning has been removed. Builds with
328 --disable-versioning had not worked for several years.
330 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
331 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
333 * SystemTap probes for malloc have been introduced.
335 * SystemTap probes for slow multiple precision fallback paths of
336 transcendental functions have been introduced.
338 * Support for powerpc64le has been added.
340 * The soft-float powerpc port now supports e500 processors.
342 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
344 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
345 set of header declarations that are enabled by default, even when other
346 feature test macros or compiler options such as -std=c99 would otherwise
347 disable some of those declarations.
349 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
350 conflict with POSIX. The libbsd-compat library (which was a dummy library
351 that did nothing) has also been removed.
353 * Preliminary documentation about Multi-Thread, Async-Signal and
354 Async-Cancel Safety has been added.
356 * Change of ABI data structures for s390 and s390x:
357 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
358 allow for future hardware extensions. All library functions that accept or
359 return these structures were versioned in order to provide backwards
360 compatibility with existing code. However, not all cases can be handled
361 with interface versioning. If an application embeds either structure into
362 another structure and that structure is passed to another compilation unit
363 which expects the newer larger-sized object then any access to the new
364 fields will result in undefined behaviour. Similarly any access to fields
365 that were moved by the enlarging of the structures will cause undefined
366 behaviour. To fix the undefined behaviour all objects that are part of the
367 final in-memory image must agree on the size of structures, and this may
368 require recompilation.
372 * The following bugs are resolved with this release:
374 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
375 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
376 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
377 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
378 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
379 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
380 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
381 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
382 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
383 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
384 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
385 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
386 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
389 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
390 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
391 Distributions can re-enable building and using pt_chown via the new configure
392 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
393 considerable security risks and should only be used if the distribution
394 understands and accepts the risks.
396 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
399 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
400 fixed (Bugzilla #15330).
402 * Add support for calling C++11 thread_local object destructors on thread
403 and program exit. This needs compiler support for offloading C++11
404 destructor calls to glibc.
406 * Improved worst case performance of libm functions with double inputs and
409 * Support for priority inherited mutexes in pthread condition variables on
410 non-x86 architectures.
412 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
414 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
416 * Optimized string functions for ARM. Implemented by Will Newton and
419 * Optimized libm functions for SPARC. Implemented by David S. Miller.
421 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
424 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
425 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
427 * Added a benchmark framework to track performance of functions in glibc.
429 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
430 It is based on draft TS 18661 and currently enabled as a GNU extension.
432 * On Linux, the clock function now uses the clock_gettime system call
433 for improved precision, rather than old times system call.
435 * Added support for version-3 tz format files. This is needed when using
436 the tz database release 2013e or later, and affects a few unusual cases --
437 currently only TZ='America/Godthab' for time stamps after 2037.
439 * Added new API functions pthread_getattr_default_np and
440 pthread_setattr_default_np to get and set the default pthread
441 attributes of a process.
443 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
444 This may improve lock scaling of existing programs on TSX capable systems.
445 When the --enable-lock-elision=yes parameter is specified at configure
446 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
449 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
450 availability). Implemented by Ryan S. Arnold.
452 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
456 * The following bugs are resolved with this release:
458 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
459 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
460 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
461 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
462 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
463 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
464 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
465 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
466 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
467 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
468 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
469 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
470 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
471 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
472 14879, 14889, 14893, 14898, 14914.
474 * Optimization of memcpy for MIPS.
476 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
477 EMFILE has been fixed (Bugzilla #14889).
479 * The add-on ports collection is now distributed in the "ports" subdirectory
480 of the main GNU C Library distribution, rather than separately.
482 * Port to ARM AArch64 contributed by Linaro.
484 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
485 Optimized versions of memcpy, memset, and memcmp added for System z10 and
487 Implemented by Andreas Krebbel.
489 * The new function secure_getenv allows secure access to the environment,
490 returning NULL if running in a SUID/SGID process. This function replaces
491 the internal function __secure_getenv.
493 * SystemTap static probes have been added into the dynamic linker.
494 Implemented by Gary Benson.
496 * Optimizations of string functions strstr, strcasestr and memmem.
497 Implemented by Maxim Kuvyrkov.
499 * The minimum Linux kernel version that this version of the GNU C Library
500 can be used with is 2.6.16.
502 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
503 powerpc POWER7. Implemented by Will Schmidt.
505 * New configure option --disable-nscd builds the C library such that it
506 never attempts to contact the Name Service Caching Daemon (nscd).
507 New configure option --disable-build-nscd avoids building nscd itself;
508 this is the default if --disable-nscd is used.
510 * Improved support for cross-compilation, including cross-testing and
511 bootstrap builds without a previously built glibc.
513 * Several testsuite tests are now able to test multiple IFUNC variants of an
514 interface, rather than just testing the one that would be chooen by
517 * New configure options --with-bugurl and --with-pkgversion, for
518 distributors to use to embed their bug-reporting and package version
519 information in --help and --version output.
521 * The ttyname and ttyname_r functions on Linux now fall back to searching for
522 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
523 allows creation of chroots without the procfs mounted on /proc.
525 * The `crypt' function now fails if passed salt bytes that violate the
526 specification for those values. On Linux, the `crypt' function will
527 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
528 enabled, and fail on encrypted strings using the MD5 or DES algorithm
529 when the mode is enabled.
531 * The `clock_*' suite of functions (declared in <time.h>) is now available
532 directly in the main C library. Previously it was necessary to link with
533 -lrt to use these functions. This change has the effect that a
534 single-threaded program that uses a function such as `clock_gettime' (and
535 is not linked with -lrt) will no longer implicitly load the pthreads
536 library at runtime and so will not suffer the overheads associated with
537 multi-thread support in other code such as the C++ runtime library.
539 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
544 * The following bugs are resolved with this release:
546 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
547 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
548 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
549 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
550 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
551 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
552 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
553 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
554 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
555 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
556 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
557 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
558 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
559 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
560 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
561 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
562 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
563 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
564 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
565 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
566 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
567 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
570 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
571 configuring glibc with:
572 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
573 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
574 Implemented by H.J. Lu.
578 + define static_assert
580 + do not declare gets
582 + declare at_quick_exit and quick_exit also for ISO C11
584 + aligned_alloc. NB: The code is deliberately allows the size parameter
585 to not be a multiple of the alignment. This is a moronic requirement
586 in the standard but it is only a requirement on the caller, not the
591 + uchar.h support added
593 + CMPLX, CMPLXF, CMPLXL added
595 Implemented by Ulrich Drepper.
597 * Support for the IA-64 has been moved to ports.
599 * Remove support for anything but ELF binary format
601 * Checking versions of poll, ppoll added.
602 Implemented by Ulrich Drepper.
604 * More generic and 64-bit performance optimizations to math functions.
605 Implemented by Ulrich Drepper.
607 * New configure option --enable-obsolete-rpc makes the deprecated RPC
608 headers and functions available at compile time as they were before
609 version 2.14. This option will be removed at some time in the future
610 after the TI-RPC library becomes fully sufficient for the needs of
611 existing applications.
613 * Compatibility code for Linux kernel versions before 2.4 has been removed.
614 Note that glibc is not expected to work with any Linux kernel version
617 * New header <sys/auxv.h> and function getauxval allowing easy access to
618 the AT_* key-value pairs passed from the Linux kernel. The header also
619 defines the HWCAP_* bits associated with the AT_HWCAP key.
621 * New locales: mag_IN
623 * New configure option --enable-systemtap builds SystemTap static probes
624 into libc for setjmp and longjmp and into libpthread for various operations.
625 So far the setjmp/longjmp probes and some of the libpthread probes are
626 provided only for i*86 and x86_64.
627 Implemented by Roland McGrath and Rayson Ho.
629 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
631 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
634 * More optimized functions for SPARC. Implemented by David S. Miller.
636 * Improved support for cross-compilation, especially bootstrap builds
637 without a previously built glibc.
639 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
640 Chris Metcalf from Tilera.
642 * Support for the old ARM ABI has been removed from ports. Only the EABI is
643 now supported for ARM processors.
645 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
646 as the name of the dynamic linker, to distinguish it from the
647 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
649 * Support for CRIS has been removed from ports.
651 * A new class of installed header has been documented for low-level
652 platform-specific functionality. PowerPC added the first instance with a
653 function to provide time base register access. Contributed by Tulio
654 Magno Quites Machado Filho.
656 * ix86 configurations now install header files that are consistent with
657 what x86-64 configurations install. These same header files can be used
658 for -m32, -m64, or -mx32 builds.
659 Contributed by H.J. Lu.
661 * Math library bug fixes. A thorough audit of all open math library bugs was
662 conducted by Joseph Myers. Significant progress was made on many math
663 library bugs resulting in more accurate exceptions and function results.
664 Many thanks to all those that contributed including Andreas Jaeger for his
665 patch review and work on the x87 trigonometric instruction issues.
667 * Timezone data is no longer installed. Timezone-related binaries and scripts
668 will continue to be installed. Users should obtain their timezone data from
669 their distribution provider or from the tzdata package at
670 <ftp://munnari.oz.au/pub/>.
674 * The following bugs are resolved with this release:
676 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
677 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
678 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
679 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
680 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
681 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
682 13484, 13506, 13515, 13523, 13524, 13538, 13540
684 * New program pldd to list loaded object of a process
685 Implemented by Ulrich Drepper.
687 * Add nss_db support back to glibc. No more dependency on Berkeley db
688 and support for initgroups lookups.
689 Implemented by Ulrich Drepper.
691 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
692 Contributed by HJ Lu.
694 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
695 Contributed by HJ Lu.
697 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
698 on x86-32 and x86-64.
699 Contributed by Liubov Dmitrieva.
701 * Optimized strchr and strrchr for SSE on x86-32.
702 Contributed by Liubov Dmitrieva.
704 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
705 for x86-64 and x86-32.
706 Contributed by Liubov Dmitrieva.
708 * New interfaces: scandirat, scandirat64
709 Implemented by Ulrich Drepper.
711 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
712 Implemented by Ulrich Drepper.
714 * nscd now also caches the netgroup database.
715 Implemented by Ulrich Drepper.
717 * Integrate libm with gcc's -ffinite-math-only option.
718 Implemented by Ulrich Drepper.
720 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
721 to math functions. Implemented by Ulrich Drepper.
723 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
724 Implemented by Ulrich Drepper.
726 * New Linux interfaces: process_vm_readv, process_vm_writev
728 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
729 Implemented by Ulrich Drepper.
731 * Optimized nearbyint and strcasecmp for PPC.
732 Implemented by Adhemerval Zanella.
734 * New locales: bho_IN, unm_US, es_CU, ta_LK
738 * The following bugs are resolved with this release:
740 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
741 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
742 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
743 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
744 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
745 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
746 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
747 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
748 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
749 12795, 12811, 12813, 12814, 12841
751 * The RPC implementation in libc is obsoleted. Old programs keep working
752 but new programs cannot be linked with the routines in libc anymore.
753 Programs in need of RPC functionality must be linked against TI-RPC.
754 The TI-RPC implementation is IPv6 enabled and there are other benefits.
756 Visible changes of this change include (obviously) the inability to link
757 programs using RPC functions without referencing the TI-RPC library and the
758 removal of the RPC headers from the glibc headers.
759 Implemented by Ulrich Drepper.
761 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
762 syncfs, setns, sendmmsg
764 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
765 yue_HK, lij_IT, mhr_RU
767 * New encodings: CP770, CP771, CP772, CP773, CP774
769 * New program sotruss to trace calls through PLTs
770 Implemented by Ulrich Drepper.
772 * The malloc hook implementation is marked deprecated and will be removed
773 from the default implementation in the next version. The design never
774 worked ever since the introduction of threads. Even programs which do
775 not create threads themselves can use multiple threads created internally.
779 * The following bugs are resolved with this release:
781 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
782 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
783 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
784 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
787 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
789 * POWER7 optimizations: memset, memcmp, strncmp
791 * New optimized string functions for x86-64: strnlen (SSE2),
792 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
793 Implemented by Ulrich Drepper.
797 * The following bugs are resolved with this release:
799 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
800 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
801 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
802 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
803 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
804 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
805 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
806 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
808 * New interfaces: pthread_getname_np, pthread_setname_np
810 * New Linux interface: recvmmsg
812 * STT_GNU_IFUNC implemented for Sparc by David Miller.
814 * The dynamic linker now recognizes supported ABI versions from the
815 EI_ABIVERSION field in the ELF header.
816 Implemented by Ulrich Drepper.
818 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
819 will not be used to fill in password fields in the passwd.byname replies.
820 Instead it is used to synthesize the shadow.byname table, should it be
821 missing. This is a useful mode in some installations involving Solaris.
822 Implemented by Ulrich Drepper.
824 * New locales: kok_IN, sq_MK, cv_RU
828 * The following bugs are resolved with this release:
830 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
831 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
832 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
833 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
834 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
835 10789, 10817, 10823, 10840, 10847
837 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
839 Implemented by Ulrich Drepper.
841 * Checking version of longjmp added that fails if an uninitialized stack
842 frame would be created. Implemented by Ulrich Drepper.
844 * STT_GNU_IFUNC is now supported in static executables.
845 Implemented by H.J. Lu.
847 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
849 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
850 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
851 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
852 Contributed by H.J. Lu.
854 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
855 Implemented by Ulrich Drepper.
857 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
859 Contributed by H.J. Lu.
861 * Support for fma instruction in AVX on x86-64.
862 Implemented by H.J. Lu and Ulrich Drepper.
864 * AVX support in x86-64 auditing support in ld.so.
865 Implemented by H.J. Lu.
867 * STB_GNU_UNIQUE support added.
868 Implemented by Ulrich Drepper.
870 * Implement second fallback mode for optimized DNS lookup for even more
871 broken environments. If two requests from the same port are not
872 handled correctly close the socket and open a new one before sending
873 the second request. The 'single-request-reopen' option in /etc/resolv.conf
874 can be used to select this mode right away, instead of rediscovering the
875 necessity is every process again.
876 Implemented by Ulrich Drepper.
878 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
879 Implemented by Adam Tkac.
881 * Optimized iconv conversions for S390x.
882 Implemented by Andreas Krebbel.
884 * Using condvars with PI mutexes is now more efficient due to kernel
885 support for requeueing to PI futexes. NPTL support added for x86-64.
886 Implemented by Ulrich Drepper.
888 * New locales: ps_AF, my_MM
892 * The following bugs are resolved with this release:
894 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
895 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
896 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
897 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
898 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
900 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
901 Implemented by Ulrich Drepper.
903 * New Linux interfaces: accept4, fallocate, fallocate64.
904 Implemented by Ulrich Drepper.
906 * Correct declarations of string function when used in C++ code. This
907 could lead to compile errors for invalid C++ code.
909 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
912 * New POSIX 2008 interface: psiginfo
913 Implemented by Ulrich Drepper.
915 * New ISO C++1x interfaces: quick_exit, at_quick_exit
916 Implemented by Ulrich Drepper.
918 * Support for selecting between multiple function definitions at runtime
919 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
921 * The libcrypt library can now use the hash function implementations in
922 NSS. Implemented by Ulrich Drepper.
924 * The malloc implementation can be compiled to be less memory efficient
925 but higher performing in multi-threaded programs.
926 Implemented by Ulrich Drepper.
928 * New locales: nan_TW@latin, ks_IN
930 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
931 Implemented by Ulrich Drepper.
933 * Extended printf hook support. It is possible to use user-defined types
934 and extend existing format specifiers.
935 Implemented by Ulrich Drepper.
937 * Handling for group shadow files has been added.
938 Implemented by Ulrich Drepper.
940 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
941 servers (the case, e.g., for some people using the built-in DNS
942 server in ADSL modems/routers). There is a once-per-process timeout
943 in case of a broken server. To avoid it, users can run nscd or put
944 'options single-request' in /etc/resolv.conf.
945 Implemented by Ulrich Drepper.
949 * The following bugs are resolved with this release:
951 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
952 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
953 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
954 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
955 6968, 6974, 6980, 6995, 7008, 7009, 7029
957 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
958 up at the same time. Implemented by Ulrich Drepper.
960 * TLS descriptors for LD and GD on x86 and x86-64.
961 Implemented by Alexandre Oliva.
963 * getaddrinfo now handles DCCP and UDPlite.
964 Implemented by Ulrich Drepper.
966 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
967 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
968 Implemented by Ulrich Drepper.
970 * New implementation of memmem, strstr, and strcasestr which is O(n).
971 Implemented by Eric Blake.
973 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
975 * Implement "e" option for popen to open file descriptor with the
976 close-on-exec flag set. Implemented by Ulrich Drepper.
978 * Implement "b" mode for fmemopen. In this mode writes writes don't
979 implicitly add a NUL byte and seeks from the end of the buffer really
980 use the buffer end, not the string length as the basis.
981 Implemented by Ulrich Drepper.
983 * Many functions, exported and internal, now atomically set the close-on-exec
984 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
986 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
988 Implemented by Pravin Satpute.
990 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
994 * The following bugs are resolved with this release:
996 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
997 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
998 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
999 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1000 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1001 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1002 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1004 * New locales: bo_CN, bo_IN, shs_CA.
1006 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1008 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1009 Implemented by Pravin Satpute.
1011 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1013 * nscd caches now all timeouts for DNS entries
1014 Implemented by Ulrich Drepper.
1016 * nscd is more efficient and wakes up less often.
1017 Implemented by Ulrich Drepper.
1019 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1020 vdprintf, and obstack_vprintf.
1021 Implemented by Jakub Jelinek.
1023 * Faster memset for x86-64.
1024 Implemented by Harsha Jagasia and H.J. Lu.
1026 * Faster memcpy on x86.
1027 Implemented by Ulrich Drepper.
1029 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1030 Implemented by Ulrich Drepper.
1032 * Faster sqrt and sqrtf implemention for some PPC variants.
1033 Implemented by Steven Munroe.
1037 * The following bugs are resolved with this release:
1039 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1040 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1041 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1042 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1043 5071, 5103, 5104, 5112, 5113, 5184, 5186
1045 * More checking functions: fread, fread_unlocked, open*, mq_open.
1046 Implemented by Jakub Jelinek and Ulrich Drepper.
1048 * Extend fortification to C++. Implemented by Jakub Jelinek.
1050 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1051 by not recognizing 'a' as a modifier when those specs are requested.
1052 Implemented by Jakub Jelinek.
1054 * PPC optimizations to math and string functions.
1055 Implemented by Steven Munroe.
1057 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1058 options to be passed. Implemented by Ulrich Drepper.
1060 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1062 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1063 Implemented by Ulrich Drepper.
1065 * Handle private futexes in the NPTL implementation.
1066 Implemented by Jakub Jelinek and Ulrich Drepper.
1068 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1069 Implemented by Roland McGrath and Ulrich Drepper.
1071 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1073 * SHA-256 and SHA-512 based password encryption.
1074 Implemented by Ulrich Drepper.
1076 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1077 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1080 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1081 Implemented by Ulrich Drepper.
1085 * The following bugs are resolved with this release:
1087 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1088 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1089 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1090 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1091 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1092 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1093 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1096 * New Linux interfaces: epoll_pwait, sched_getcpu.
1098 * New generic interfaces: strerror_l.
1100 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1104 * The following bugs are resolved with this release:
1106 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1107 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1108 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1109 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1110 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1111 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1112 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1113 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1114 3225, 3251, 3252, 3253, 3273
1116 * For Linux, the sorting of addresses returned by getaddrinfo now also
1117 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1118 Implemented by Ulrich Drepper.
1120 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1121 Implemented by Ulrich Drepper.
1123 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1125 * New iconv module for MIK. Contributed by Alexander Shopov.
1127 * For sites with broken group and/or passwd database, the auto-propagate
1128 option of nscd can prevent creating ID lookup entries from the results
1129 of a name lookup and vice versa. This usually is no problem but some
1130 site might have problems with the default behavior.
1131 Implemented by Ulrich Drepper.
1133 * Iterating over entire database in NIS can be slow. With the
1134 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1135 to trade time for memory. The entire database will be read at once.
1136 Implemented by Ulrich Drepper.
1138 * The interfaces introduced in RFC 3542 have been implemented by
1141 * Support for the new ELF hash table format was added by Ulrich Drepper.
1143 * Support for priority inheritance mutexes added by Jakub Jelinek and
1146 * Support for priority protected mutexes added by Jakub Jelinek.
1148 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1149 or_IN, csb_PL, fy_NL, sr_ME.
1153 * More overflow detection functions.
1155 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1156 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1158 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1159 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1160 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1161 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1162 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1163 by Masahide Washizawa.
1165 * It is now possible to install audit libraries for the dynamic linker using
1166 LD_AUDIT. Implemented by Ulrich Drepper.
1168 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1169 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1170 For a libc and libpthread that works well on Linux 2.4 kernels, we
1171 recommend using the stable 2.3 branch.
1173 * The new function open_wmemstream acts like open_memstream,
1174 but uses a wchar_t wide character buffer.
1176 * The new function ppoll is an improved version of poll, similar to pselect.
1178 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1179 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1180 renameat, unlinkat, linkat, symlinkat, readlinkat.
1182 * New Linux kernel system calls: unshare,
1183 inotify_init, inotify_add_watch, inotify_rm_watch.
1185 * The euidaccess function is now also known by the alias eaccess,
1186 for compatibility with some other systems.
1188 * Timezone data updated to 2006b version.
1192 * The following bugs are resolved with this release:
1194 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1195 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1196 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1197 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1198 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1199 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1201 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1203 * As of this release, GCC 4 can be used to compile the C Library.
1205 * Timezone data updated to 2005m version.
1209 * The following bugs are resolved with this release:
1211 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1212 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1213 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1214 777, 787, 821, 822, 823, 825
1216 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1220 * Support for RFC 3678. Real implementations exist only for Linux so far.
1221 Implemented by Ulrich Drepper.
1223 * nscd can now cache entries persistently. Expiring entries are reloaded.
1224 For speedups the cache can be shared in memory with client processes.
1225 Implemented by Ulrich Drepper.
1227 * nscd can now perform SELinux checks.
1228 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1230 * getaddrinfo queries are now cached. Canonical name lookup is performed
1232 Implemented by Ulrich Drepper.
1234 * The nothrow function attribute is used when headers are used by gcc when
1235 compiling C code. This can avoid significant amounts of exception
1238 * The malloc functions perform more error checking and are stricter when
1239 it comes to reacting on errors. The default action is to terminate
1240 the process after showing an error message. Implemented by Ulrich Drepper.
1242 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1243 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1245 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1246 namespaces using the new function dlmopen(). This feature is of course,
1247 like most other dynamic loading functionality, not available in statically
1248 linked applications. Implemented by Ulrich Drepper.
1250 * Low-overhead boundary checking variants of string and some stdio functions
1251 were added. These are to be used in conjunction with a gcc patch by
1252 Jakub Jelinek which adds calls to these functions if possible.
1253 Implemented by Jakub Jelinek and Ulrich Drepper.
1255 * Old code for several operating systems and machine architectures that
1256 have not been in working condition in a long time have been removed from
1257 the main source tree maintained by the GNU C Library's maintainers.
1258 These files are now reside in the separate `ports' source module
1259 that is usable as an add-on when building the library.
1263 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1264 interrogate the dynamic linker, compatible with the Solaris interface.
1266 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1267 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1269 * getifaddrs now uses the netlink interface on Linux to get its information.
1270 Implemented by Thorsten Kukuk.
1272 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1273 Implemented by Ulrich Drepper.
1275 * support for non-executable stacks on x86 has been added. Changes mostly
1278 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1281 * getaddrinfo now performs destination address selection according to
1286 * Thread-safe interfaces for many functions that access locale data
1287 were added in version 2.3, but these features were omitted from NEWS.
1288 Many functions have variants with an `_l' suffix that take a `locale_t'
1289 object as a parameter rather than consulting the current locale.
1290 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1291 create and maintain `locale_t' objects. Additionally, the new function
1292 `uselocale' sets "the current locale" (as used by functions not so
1293 parameterized) set for an individual thread. These features were added
1294 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1296 * The functions getresuid, getresgid, setresuid, and setresgid, which
1297 have long been available on Linux, are now declared in <unistd.h>
1298 and are now also available on the Hurd.
1300 * ELF thread-local storage support (TLS) now works on x86-64.
1302 * The new dynamic string token $LIB is expanded in shared library names.
1303 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1305 * Aldy Hernandez contributed complete software floating point support for
1306 PowerPC machines with no FPU.
1308 * fexecve is implemented on Linux.
1310 * The `btowc' function should work at least twice as fast due to
1311 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1313 * With approriate thread add-ons cancelable functions are now implemented
1314 in libc.so as well. No need to call the function in libpthread. This
1315 change allowed to finally disable the incorrect and expensive handling
1316 of weak definition in ld.so.
1318 * Yet more PLT entries in libc.so have been removed. We finally arrived
1319 at the bare minimum. Startup times improved appropriately.
1321 * Support for the new Linux/x86 system call interface was added. The
1322 AT_SYSINFO auxiliary vector entry is recognized and handled.
1326 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1329 * iconv (the program and the interface) now accepts empty names (excluding
1330 options like //TRANSLIT) to mean "use charset of current locale".
1332 * localedef can now transliterate characters in strings which are not in
1333 the provided charmap. The information from the input locale is used.
1335 * Prelinking support was added for ELF targets. This requires additional
1336 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1338 * Read-only stdio streams now use mmap to speed up operation by eliminating
1339 copying and buffer underflows. To use add 'm' to the mode string of
1340 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1342 * The malloc functions were completely rewritten by Wolfram Gloger based
1343 on Doug Lea's malloc-2.7.0.c.
1345 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1346 implementation of regex.
1348 * Bruno Haible upgraded the iconv and locale implementation to support
1351 * Contents of the LC_* and LANG environment variables in the CEN style are
1352 not recognized anymore. It never was used. Change by Ulrich Drepper.
1354 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1355 thread-local storage (TLS) ABI on some platforms.
1356 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1358 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1359 EUC-JISX0213, and TSCII.
1361 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1362 BSD-compatible interface for getting all network interface addresses.
1363 Implementation for IPv4 by Roland McGrath.
1365 * Loading of locale data is faster due to the introduction of a locale
1366 archive. Implemented by Roland McGrath and Ulrich Drepper.
1368 * Startup times are significantly reduced by not using exported functions
1369 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1372 * Steven Munroe contributed a port to PowerPC64/Linux.
1376 * The Hurd now uses the GNU libio implementation of stdio rather than the
1377 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1379 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1380 with the same behavior as the Linux system call of the same name.
1384 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1385 128-bit long double format.
1387 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1388 IBM1161, and IBM1162 charsets.
1390 * Andreas Jaeger contributed a port to x86-64/Linux.
1392 * Peter Bruin contributed a port to PowerPC/Hurd.
1394 * libc functions using I/O streams now can handle wide-oriented streams
1397 * optimizations in the dynamic linker. Binaries created by recent binutils
1398 versions start up quicker due to reduced time spent on relocations.
1400 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1404 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1405 asinh, atanh, j0 for the 128-bit long double format.
1407 * Bruno Haible updated all the code handling Unicode in some form to
1408 support Unicode 3.1.
1410 * Speed of regex for single-byte locales is back to previous levels.
1411 Patch by Isamu Hasegawa.
1413 * Alpha, SPARC, and IA-64 now also using floating stacks.
1415 * Startup time of internationalized applications greatly improved through
1416 iconv cache. Use iconvconfig to generate the cache file.
1417 Contributed by Ulrich Drepper.
1419 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1420 severe performance problems. Patch by David Mosberger.
1422 * The Hurd port got a lot more functionality like AIO, various stdio
1423 extensions, etc. Mainly done by Roland McGrath.
1425 * mtrace can now lookup symbols in shared libraries.
1429 * Intel's IA-64 math library is largely integrated. It provides fast and
1430 accurate implementatations for most basic and standard math functions
1431 in float, double, and long double format.
1433 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1434 and asin for the 96-bit long double format and asin, log, tan for the
1435 128-bit long double format.
1437 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1438 The basic double functions exist today. Contributed by Abraham Ziv
1439 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1440 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1442 * An asynchronous name lookup library was added. The interface is designed
1443 after POSIX AIO. The proposal was circulated beforehand to get comments.
1444 No negative ones came in. Implemented by Ulrich Drepper.
1446 * Port to S390/64bit contributed by Martin Schwidefsky
1447 <schwidefsky@de.ibm.com>.
1449 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1450 of functions for Linux/IA-64.
1452 * The RPC code is now thread safe. Threads can now use the same service
1453 of different services at the same time. Patch by Eric Norum
1454 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1456 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1457 family of functions for Linux/S390.
1459 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1460 of functions for Linux/x86.
1462 * Port to Linux/CRIS contributed by Axis Communications.
1466 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1467 we can now check for namespace violations and missing declarations. The
1468 result is that almost all headers are now Unix-compliant (as defined in
1469 the upcoming XPG6). The negative side is that some programs might need
1470 corrections, too, if they depend on the incorrect form of the headers in
1471 previous versions which defined too many symbols and included too many
1474 * regex now handles multibyte character sets correctly.
1475 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1477 * iconv (the program) does now conform to the upcoming XPG6 and handles
1478 charmaps. Instead of the charset names the path of charmaps can be
1479 provided and the conversion happens based on this data.
1480 Contributed by Ulrich Drepper.
1482 * The locale program now provides detailed information about the installed
1487 only lists the names of the supported locales
1491 provides details such as country, language, and codeset name.
1492 Contributed by Ulrich Drepper.
1496 * The gencat program now parses the input file according to the charset
1497 selected by the LC_CTYPE category. This is important for stateful
1498 character sets. To make generating catalogs easier there is a way
1499 to overwrite the charset selected by the locale: before the first
1500 message or $ quote line the catalog can contain a line like
1502 $ codeset=ISO-8859-2
1504 to select the charset (ISO-8859-2 in this case).
1506 Implemented by Shinya Hanataka and Ulrich Drepper.
1508 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1509 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1510 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1512 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1513 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1515 * The LANGUAGE environment variable is now ignored unless the locale is
1516 changed from the default "C" locale.
1518 * The usual bug fixes.
1522 * Greg McGary added runtime support for bounds checking using gcc's
1523 new -fbounded-pointers option. ix86 target is complete. PowerPC
1526 * Thorsten Kukuk added secure mode support to nscd.
1528 * The Berkeley db libraries have been removed.
1530 Related, the nss_db module is now in a separate package since it
1531 obviously requires a database library being available.
1533 * Wide character I/O streams implemented by Ulrich Drepper.
1535 * Functions from the extended socket API added by Ulrich Drepper.
1537 * Functions feenableexcept and fedisableexcept to control the
1538 behaviour of individual exceptions have been added by Andreas Jaeger.
1540 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1542 * The resolver code has been updated from bind 8.2.3-T5B which supports
1543 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1546 This change could in some situations effect backward compatibility. Since
1547 now `_res' is a thread-local instead of a global variable, modifying it
1548 in one thread does not have any effect in other threads.
1550 The resolver library was also extended to allow IPv6 as the transport
1551 protocol for the requests. This work was done by Stig Venaas.
1553 * Compatibility code for K&R C compilers has been removed from the
1554 header files. A ISO C compiler is needed to use the library
1555 (conforming to either C89 or C99 standard).
1557 * Complete rewrite of the localedef program to support multibyte character
1558 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1559 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1560 Implemented by Ulrich Drepper.
1562 Bruno Haible significantly improved the generation and use of the data
1563 structures for the wide character tables.
1565 * Plural handling in gettext implemented by Ulrich Drepper.
1567 * The utmp daemon has been removed.
1569 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1571 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1574 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1576 * POSIX barriers implemented by Kaz Kylheku.
1578 * POSIX spawn function family implemented by Ulrich Drepper.
1580 * POSIX spinlocks are now available.
1582 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1584 * the configure option --enable-kernel=X.Y.Z allows to strip out
1585 compatibility for kernel versions before X.Y.Z. This is currently only
1586 implemented for Linux.
1588 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1589 field sin6_scope_id. This means that all programs using IPv6 should be
1590 recompiled. Don't expect binary compatibility with previous glibc
1593 * various conversion modules for IBM character sets contributed by
1596 * IA-64 port by Jes Sorensen and HJ Lu.
1610 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1612 * New xdr functions are added; some rpc functions are now 64bit clean.
1614 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1616 * Fixed known incompatibilities with glibc 2.0.
1618 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1620 * Optimized a number of functions (especially the ELF dynamic loader).
1622 * Update timezone data files.
1624 * lots of charmaps corrections
1626 * some new locale definitions and charmaps
1631 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1632 conform to POSIX member type requirements. Symbol versions have been
1633 adjusted as needed within the library, and for direct use by applications,
1634 but there is potential for problems if third-party libraries use
1635 struct timeval as part of their interface. This does not present
1636 a problem for X and other "essential" system libraries.
1638 * An additional locale model to support C++ Standard Library locale
1639 model and probably more was implemented by Ulrich Drepper.
1641 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1644 * Miles Bader provided the `argp' function family to support hierachical
1645 command line argument parsing, layered on top of getopt.
1647 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1649 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1652 * scanf recognizes the %a and %A format for scanning floating point numbers.
1654 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1655 information and interfaces for the available integer types.
1657 * about 130 new math functions were added to implement the ISO C9x math
1660 * the new header <complex.h> contains definitions of the complex math
1661 functions from ISO C 9X.
1663 * the new header <tgmath.h> defines generic macros to use complex or
1664 real valued functions.
1666 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1668 * Andreas Jaeger provided a test suite for the math library.
1670 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1672 * Ulrich Drepper added character set conversion functions (iconv).
1674 * Optimized string functions have been added.
1676 * The localedata addon is now part of glibc.
1678 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1680 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1681 daemon for NSS (nscd).
1683 Missing a better place here are some numbers on improvements. Under
1684 Linux 2.1.125 un-tar-ing the kernel sources takes
1688 using local files 12.19s 6.88s 22.91s
1690 using NIS 13.92s 8.91s 26.34s
1692 using NIS & nscd 10.37s 7.34s 25.30s
1694 using NIS+ 27.57s 30.37s 640.46s
1696 using NIS+ & nscd 10.25s 7.83s 26.51s
1698 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1700 Keep in mind that non-namelookup related operations dominate above times.
1701 It was just a common complain that using NIS+ unpacking the kernel is
1704 [1] The old nscd implementation is not available anymore since it was
1705 distributed with glibc up to version 2.0.98 and thus is now replaced.
1707 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1709 * Mark Kettenis provided a Hesiod NSS module.
1711 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1712 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1714 * rcmd can now handle netgroups (Dick Streefland).
1716 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1719 * Support for the IPv6 protocol has been added to the socket API, as per the
1720 latest draft standards.
1722 * Support for Linux 2.2 has been added.
1724 * Interface changes relative to the latest 2.0.x release:
1725 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1726 addseverity NEW: Unix98
1727 alphasort64 NEW: LFS
1728 argp_err_exit_status NEW: argp, GNU ext
1729 argp_error NEW: argp, GNU ext
1730 argp_failure NEW: argp, GNU ext
1731 argp_help NEW: argp, GNU ext
1732 argp_parse NEW: argp, GNU ext
1733 argp_program_bug_address NEW: argp, GNU ext
1734 argp_program_version NEW: argp, GNU ext
1735 argp_program_version_hook NEW: argp, GNU ext
1736 argp_state_help NEW: argp, GNU ext
1737 argp_usage NEW: argp, GNU ext
1738 authdes_create NEW: Secure RPC
1739 authdes_getucred NEW: Secure RPC
1740 authdes_pk_create NEW: Secure RPC
1741 backtrace NEW: GNU ext.
1742 backtrace_symbols NEW: GNU ext.
1743 backtrace_symbols_fd NEW: GNU ext.
1745 cacosf NEW: ISO C 9x
1746 cacosh NEW: ISO C 9x
1747 cacoshf NEW: ISO C 9x
1748 cacoshl NEW: ISO C 9x
1749 cacosl NEW: ISO C 9x
1756 casinf NEW: ISO C 9x
1757 casinh NEW: ISO C 9x
1758 casinhf NEW: ISO C 9x
1759 casinhl NEW: ISO C 9x
1760 casinl NEW: ISO C 9x
1762 catanf NEW: ISO C 9x
1763 catanh NEW: ISO C 9x
1764 catanhf NEW: ISO C 9x
1765 catanhl NEW: ISO C 9x
1766 catanl NEW: ISO C 9x
1767 cbc_crypt NEW: Secure RPC
1771 ccoshf NEW: ISO C 9x
1772 ccoshl NEW: ISO C 9x
1778 cimagf NEW: ISO C 9x
1779 cimagl NEW: ISO C 9x
1780 clearerr_locked REMOVED
1781 clntunix_create NEW: sunrpc ext
1783 clog10 NEW: ISO C 9x
1784 clog10f NEW: ISO C 9x
1785 clog10l NEW: ISO C 9x
1795 cprojf NEW: ISO C 9x
1796 cprojl NEW: ISO C 9x
1798 crealf NEW: ISO C 9x
1799 creall NEW: ISO C 9x
1804 csinhf NEW: ISO C 9x
1805 csinhl NEW: ISO C 9x
1808 csqrtf NEW: ISO C 9x
1809 csqrtl NEW: ISO C 9x
1813 ctanhf NEW: ISO C 9x
1814 ctanhl NEW: ISO C 9x
1816 des_setparity NEW: Secure RPC
1817 ecb_crypt NEW: Secure RPC
1818 endutxent NEW: Unix98
1820 exp10f NEW: ISO C 9x
1821 exp10l NEW: ISO C 9x
1825 fattach NEW: STREAMS
1826 fdetach NEW: STREAMS
1830 feclearexcept NEW: ISO C 9x
1831 fegetenv NEW: ISO C 9x
1832 fegetexceptflag NEW: ISO C 9x
1833 fegetround NEW: ISO C 9x
1834 feholdexcept NEW: ISO C 9x
1836 feraiseexcept NEW: ISO C 9x
1837 ferror_locked REMOVED
1838 fesetenv NEW: ISO C 9x
1839 fesetexceptflag NEW: ISO C 9x
1840 fesetround NEW: ISO C 9x
1841 fetestexcept NEW: ISO C 9x
1842 feupdateenv NEW: ISO C 9x
1843 fflush_locked REMOVED
1847 fgets_unlocked NEW: GNU ext.
1848 fileno_locked REMOVED
1860 fputc_locked REMOVED
1861 fputs_unlocked NEW: GNU ext.
1862 fread_unlocked NEW: GNU ext.
1867 fstatvfs NEW: Unix98
1871 ftruncate64 NEW: LFS
1873 fwrite_unlocked NEW: GNU ext.
1874 gai_strerror NEW: IPv6
1878 getchar_locked REMOVED
1880 getdate_err NEW: Unix98
1881 getdate_r NEW: GNU ext.
1883 getnameinfo NEW: IPv6
1884 getnetname NEW: Secure RPC
1885 getpmsg NEW: STREAMS
1886 getpt NEW: Unix98 PTY
1887 getrlimit64 NEW: LFS
1888 getutxent NEW: Unix98
1889 getutxid NEW: Unix98
1890 getutxline NEW: Unix98
1891 glob64 NEW: GNU ext.
1892 globfree64 NEW: GNU ext.
1893 gnu_get_libc_release NEW: GNU ext.
1894 gnu_get_libc_version NEW: GNU ext.
1895 grantpt NEW: Unix98 PTY
1896 host2netname NEW: Secure RPC
1898 iconv_close NEW: iconv
1899 iconv_open NEW: iconv
1900 if_freenameindex NEW: IPv6
1901 if_indextoname NEW: IPv6
1902 if_nameindex NEW: IPv6
1903 if_nametoindex NEW: IPv6
1904 in6addr_any NEW: IPv6
1905 in6addr_loopback NEW: IPv6
1906 inet6_isipv4mapped NEW: IPv6
1907 isastream NEW: STREAMS
1908 iswblank NEW: GNU ext.
1909 key_decryptsession NEW: Secure RPC
1910 key_decryptsession_pk NEW: Secure RPC
1911 key_encryptsession NEW: Secure RPC
1912 key_encryptsession_pk NEW: Secure RPC
1913 key_gendes NEW: Secure RPC
1914 key_get_conv NEW: Secure RPC
1915 key_secretkey_is_set NEW: Secure RPC
1916 key_setnet NEW: Secure RPC
1917 key_setsecret NEW: Secure RPC
1918 llrint NEW: ISO C 9x
1919 llrintf NEW: ISO C 9x
1920 llrintl NEW: ISO C 9x
1921 llround NEW: ISO C 9x
1922 llroundf NEW: ISO C 9x
1923 llroundl NEW: ISO C 9x
1928 lrintf NEW: ISO C 9x
1929 lrintl NEW: ISO C 9x
1930 lround NEW: ISO C 9x
1931 lroundf NEW: ISO C 9x
1932 lroundl NEW: ISO C 9x
1934 makecontext NEW: Unix98
1935 mempcpy NEW: GNU ext.
1938 modify_ldt NEW: kernel
1942 nearbyint NEW: ISO C 9x
1943 nearbyintf NEW: ISO C 9x
1944 nearbyintl NEW: ISO C 9x
1945 netname2host NEW: Secure RPC
1946 netname2user NEW: Secure RPC
1947 nexttoward NEW: ISO C 9x
1948 nexttowardf NEW: ISO C 9x
1949 nexttowardl NEW: ISO C 9x
1953 passwd2des NEW: Secure RPC
1955 pow10f NEW: GNU ext.
1956 pow10l NEW: GNU ext.
1959 printf_size NEW: GNU ext.
1960 printf_size_info NEW: GNU ext.
1961 profil_counter REMOVED
1962 pthread_mutexattr_getkind_np REPLACED
1963 pthread_mutexattr_setkind_np REPLACED
1964 ptsname NEW: Unix98 PTY
1965 ptsname_r NEW: Unix98 PTY
1967 putchar_locked REMOVED
1968 putgrent NEW: GNU ext.
1970 putpmsg NEW: STREAMS
1971 pututxline NEW: Unix98
1975 readdir64_r NEW: LFS
1976 remquo NEW: ISO C 9x
1977 remquof NEW: ISO C 9x
1978 remquol NEW: ISO C 9x
1980 roundf NEW: ISO C 9x
1981 roundl NEW: ISO C 9x
1983 scalbln NEW: ISO C 9x
1984 scalblnf NEW: ISO C 9x
1985 scalblnl NEW: ISO C 9x
1987 sendfile NEW: kernel
1988 setcontext NEW: Unix98
1989 setrlimit64 NEW: LFS
1990 setutxent NEW: Unix98
1992 sigignore NEW: Unix98
1993 sigqueue NEW: POSIX.1b
1994 sigrelse NEW: Unix98
1995 sigset NEW: POSIX.1b
1996 sigtimedwait NEW: POSIX.1b
1997 sigwaitinfo NEW: POSIX.1b
1998 sincos NEW: GNU ext.
1999 sincosf NEW: GNU ext.
2000 sincosl NEW: GNU ext.
2004 strcasestr NEW: GNU ext.
2005 strtoimax NEW: ISO C 9x
2006 strtoumax NEW: ISO C 9x
2007 strverscmp NEW: GNU ext.
2008 svcauthdes_stats NEW: Secure RPC
2009 svcunix_create NEW: sunrpc etx
2010 svcunixfd_create NEW: sunrpc ext
2011 swapcontext NEW: Unix98
2012 tcgetsid NEW: Unix98 PTY
2013 tdestroy NEW: GNU ext.
2014 tgamma NEW: ISO C 9x
2015 tgammaf NEW: ISO C 9x
2016 tgammal NEW: ISO C 9x
2020 truncf NEW: ISO C 9x
2021 truncl NEW: ISO C 9x
2023 unlockpt NEW: Unix98 PTY
2024 updwtmpx NEW: Unix98
2025 user2netname NEW: Secure RPC
2026 utmpxname NEW: Unix98
2027 versionsort NEW: GNU ext.
2028 versionsort64 NEW: GNU ext.
2030 wcscasecmp NEW: GNU ext.
2031 wcsncasecmp NEW: GNU ext.
2032 wcsnlen NEW: GNU ext.
2033 wcstoimax NEW: ISO C 9x
2034 wcstoll NEW: ISO C 9x
2035 wcstoull NEW: ISO C 9x
2036 wcstoumax NEW: ISO C 9x
2038 wordexp NEW: POSIX.2
2039 wordfree NEW: POSIX.2
2040 write_profiling REMOVED
2041 xdecrypt NEW: Secure RPC
2042 xdr_authdes_cred NEW: Secure RPC
2043 xdr_authdes_verf NEW: Secure RPC
2044 xdr_cryptkeyarg NEW: Secure RPC
2045 xdr_cryptkeyarg2 NEW: Secure RPC
2046 xdr_cryptkeyres NEW: Secure RPC
2047 xdr_getcredres NEW: Secure RPC
2048 xdr_key_netstarg NEW: Secure RPC
2049 xdr_key_netstres NEW: Secure RPC
2050 xdr_keybuf NEW: Secure RPC
2051 xdr_keystatus NEW: Secure RPC
2052 xdr_netnamestr NEW: Secure RPC
2053 xdr_sizeof NEW: Secure RPC
2054 xdr_unixcred NEW: sunrpc ext
2055 xencrypt NEW: Secure RPC
2056 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2067 * inet_ntoa is thread-safe
2069 * updwtmp is moved from libutil to libc
2071 * rewrite of cbrt function
2073 * update of timezone data
2087 * add atoll function
2089 * fix complex problems in Berkeley DB code
2091 * fix math functions
2095 * fixed lots of header problems (especially Linux/GNU specific)
2097 * dynamic loader preserves all registers
2099 * Roland McGrath provided support for handling of auxiliary objects in
2100 the ELF dynamic loader.
2102 * support for parallel builds is improved
2106 * GNU extensions are no longer declared by default. To enable them you
2107 must define the macro `_GNU_SOURCE' in your program or compile with
2110 * The library has changed from using GNU ld symbol aliases to using weak
2111 symbols where available. The ELF object file format supports weak
2112 symbols; GNU ld also supports weak symbols in the a.out format. (There
2113 is also now support for other GNU ld extensions in ELF. Use the
2114 `--with-elf' option to configure to indicate you have ELF, and
2115 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2116 of many files which contained only symbol aliases, reducing the size of
2117 the source and the compiled library; many other files were renamed to
2118 less cryptic names previously occupied by the symbol alias files.
2119 There is a new header file <elf.h> for programs which operate on
2120 files in the ELF format.
2122 * Converted to Autoconf version 2, so `configure' has more options.
2123 Run `configure --help' to see the details.
2125 * The library can now be configured to build profiling, highly-optimized
2126 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2127 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2128 `configure' enable building these extra libraries. The shared library is
2129 built by default when using both ELF and GNU ld. When shared libraries
2130 are enabled, the new library `-ldl' is available for arbitrary run-time
2131 loading of shared objects; its interface is defined in <dlfcn.h>. The
2132 new header file <link.h> gives access to the internals of the run-time
2133 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2134 application of same name on other systems and it provides information
2135 about dynamically linked binaries.
2137 * The C library now provides the run-time support code for profiling
2138 executables compiled with `-pg'. Programs can control the profiling code
2139 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2140 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2141 the support for this file format was contributed by David Mosberger-Tang.
2143 * The math code has been replaced with a math library based on fdlibm from
2144 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2145 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2146 functions. The math functions now reside in a separate library, so
2147 programs using them will need to use `-lm' their linking commands.
2149 * John C. Bowman contributed optimized ix87 assembler inline functions.
2151 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2152 mechanism similar to that found in Solaris 2. This is now used for the
2153 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2154 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2155 file controls what services are used for each individual database. This
2156 works by loading shared libraries with names specified in `nsswitch.conf',
2157 so service modules can be changed or added at any time without even
2158 relinking any program. Currently there are the file, db, and NIS based
2159 NSS services available.
2161 * The new functions `strtoq' and `strtouq' parse integer values from
2162 strings, like `strtol' and `strtoul', but they return `long long int' and
2163 `unsigned long long int' values, respectively (64-bit quantities).
2165 * The new functions `strtof' and `strtold' parse floating-point values from
2166 strings, like `strtod', but they return `float' and `long double' values,
2167 respectively (on some machines `double' and `long double' are the same).
2169 * Ulrich Drepper has contributed new implementations of the floating-point
2170 printing and reading code used in the `printf' family of functions and
2171 `strtod', `strtof', and `strtold'. These new functions are perfectly
2172 accurate, and much faster than the old ones.
2174 * The implementation of the POSIX locale model was completely rewritten by
2175 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2176 to compile the POSIX locale definition.
2178 * The former dummy implementations of the strcoll and strxfrm function are
2179 now replaced by fully functional code contributed by Ulrich Drepper. The
2180 collation information comes from the POSIX locale definitions.
2182 * The new header <langinfo.h> defines an interface for accessing
2183 various locale-dependent data (using the locale chosen with `setlocale').
2185 * Ulrich Drepper has contributed a new suite of functions for operation on
2186 wide-character and multibyte-character strings, in <wchar.h>;
2187 and classification and case conversion of wide characters, in <wctype.h>.
2188 These new functions are conforming to the ISO C, Amendement 1 specification.
2190 * There is now a second implementation of the standard I/O library available.
2191 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2192 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2194 * You can now use positional parameter specifications in format strings
2195 for the `printf' and `scanf' families of functions. For example,
2196 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2197 ``Number 6, Mr Jones''. This is mainly useful when providing different
2198 format strings for different languages, whose grammars may dictate
2199 different orderings of the values being printed. To support this
2200 feature, the interface for `register_printf_handler' has changed; see
2201 the header file <printf.h> for details.
2203 * The `printf' and `scanf' families of functions now understand a new
2204 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2205 to group numbers as indicated by the locale; for `scanf' and friends, this
2206 says to accept as valid only a number with all the proper grouping
2207 separators in the right places. In the default "C" locale, numbers are
2208 not grouped; but locales for specific countries will define the usual
2209 conventions (i.e. separate thousands with `,' in the US locale).
2211 * The pgrp functions have been regularized, slightly incompatibly but much
2212 less confusingly. The core functions are now `getpgid' and `setpgid',
2213 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2214 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2215 provided for compatibility. There is no longer an incompatible `getpgrp'
2216 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2218 * The new header file <fts.h> and suite of functions simplify programs that
2219 operate on directory trees. This code comes from 4.4 BSD.
2221 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2222 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2223 NSS scheme used in glibc.
2225 * There is a new malloc debugging hook `__memalign_hook'.
2227 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2228 `unsigned int' in <sys/types.h>. These are for compatibility only and
2229 their use is discouraged.
2231 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2232 done differently, so that it works even without GNU ld.
2234 * New function `euidaccess' checks allowed access to a file like `access',
2235 but using the effective IDs instead of the real IDs.
2237 * The time zone data files have been updated for the latest and greatest
2238 local time conventions of the countries of the world.
2240 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2243 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2244 for formatting floating-point numbers. They are provided only for
2245 compatibility; new programs should use `sprintf' instead. There are
2246 also equivalent function for the `long double' floating-point type and
2247 all functions also exist in a reentrant form.
2249 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2250 functions for maintaining the login-record files (primarily of use to
2251 system programs such as `login'), and convenient functions for
2252 allocating and initializing a pseudo-terminal (pty) device.
2254 * Ulrich Drepper has contributed new support for System V style
2255 shared memory and IPC on systems that support it.
2257 * Ulrich Drepper has contributed several miscellaneous new functions found
2258 in System V: The `hsearch' family of functions provide an effective
2259 implementation of hash tables; `a64l' and `l64a' provide a very simple
2260 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2263 * Ulrich Drepper has contributed new reentrant counterparts for the
2264 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2266 * Ulrich Drepper has contributed new, highly-optimized versions of several
2267 string functions for the i486/Pentium family of processors.
2269 * Ulrich Drepper has updated the Linux-specific code, based largely
2270 on work done in Hongjiu Lu's version of GNU libc for Linux.
2271 The GNU library now supports Linux versions 2.0.10 and later,
2272 using the ELF object file format (i[3456]86-*-linux).
2274 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2276 * David Mosberger-Tang and Richard Henderson have ported the C library
2277 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2278 dynamic linking support for ELF/Alpha.
2280 * Richard Henderson contributed several Alpha optimized assembler function
2281 for arithmetic and string handling.
2283 * Ulrich Drepper has contributed a new set of message catalog functions to
2284 support multiple languages using the <libintl.h> interface, for use with
2285 his new package GNU gettext. Translation volunteers have contributed
2286 catalogs of the library's messages in Spanish, German, and Korean.
2288 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2289 program and the `catgets' function for reading the catalog files it
2290 creates. (The <libintl.h> interface is preferred; we include the
2291 <nl_types.h> interface using `catgets' only for source compatibility with
2292 programs already written to use it.)
2294 * New header file <values.h> gives SVID-compatible names for <limits.h>
2297 * Various new macros, declarations, and small header files for compatibility
2300 * New function `group_member' is a convenient way to check if a process has
2301 a given effective group ID.
2303 * When using GCC 2.7 and later, the socket functions are now declared in a
2304 special way so that passing an argument of type `struct sockaddr_in *',
2305 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2306 `struct sockaddr *' type, does not generate a type-clash warning.
2308 * New function `error' declared in header file <error.h> is a convenient
2309 function for printing error messages and optionally exiting; this is the
2310 canonical function used in GNU programs. The new functions `err', `warn',
2311 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2312 doing the same thing.
2314 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2315 POSIX.2 `glob' function to do ~ and {...} expansion.
2317 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2318 `clearenv' which is used in POSIX.9 is also available.
2320 * New function `getsid' returns session ID number on systems that support it.
2322 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2323 files <db.h> and <mpool.h> provide a rich set of functions for several
2324 types of simple databases stored in memory and in files, and <ndbm.h> is
2325 an old `ndbm'-compatible interface using the `db' functions. Link with
2326 `-ldb' to get these functions.
2328 * New macro `strdupa' copies a string like `strdup', but uses local stack
2329 space from `alloca' instead of dynamic heap space from `malloc'.
2331 * New function `strnlen' is like `strlen' but searches only a given maximum
2332 number of characters for the null terminator. `stpncpy', `strndup' and
2333 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2336 * New function `statfs' in header <sys/statfs.h>.
2338 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2339 provide convenient functions for operating on blocks of null-terminated
2342 * A new suite of functions in <utmp.h> handle all the details of reading
2343 and writing the utmp file.
2345 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2348 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2349 completely POSIX compliant and also implemented the extended functionality
2350 to handle alternate digit representation and alternate era date formats.
2352 * Ulrich Drepper provided an implementation of the `strptime' function
2353 defined in XPG4.2 which transforms a string into a `struct tm' value.
2355 * Paul Eggert provided the tzselect shell script as part of the timezone
2356 code. The shell script makes it easy to select the correct timezone
2359 * The implementation of the malloc family of functions is completely replaced
2360 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2361 The implementation uses the mmap function (if available) and it is
2362 optimized for the use in multi threaded programs.
2364 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2365 functions. This new functionality is usable by specifying a special
2366 salt string and it is compatible with implementation on *BSD systems.
2368 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2369 `getsubopt' to handle second level command line options, `bsd_signal'
2370 to access BSD style `signal' functionality, the obsolete `regexp' style
2373 * the `lchown' function is available on system which support this
2376 * The implementation of the shadow password handling function was contributed
2379 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2381 * POSIX.1g support was added. The <sys/select.h> header is available,
2382 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2383 implementation of `getaddrinfo'.
2387 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2389 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2390 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2392 * The new function `daemon' from 4.4 BSD is useful for server programs that
2393 want to put themselves in the background.
2395 * Joel Sherrill has contributed support for several standalone boards that
2396 run without an operating system.
2398 * `printf', `scanf' and friends now accept a `q' type modifier for long
2399 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2401 * All of the code taken from BSD (notably most of the math and networking
2402 routines) has been updated from the BSD 4.4-Lite release.
2404 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2406 * The new functions `getdomainname' and `setdomainname' fetch or change the
2407 YP/NIS domain name. These are system calls which exist on systems which
2410 * The time zone data files have been updated for the latest international
2413 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2414 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2418 * The C library now includes support for Sun RPC, from Sun's free
2419 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2420 are included. (There is still no support for YP.)
2422 * Tom Quinn has contributed a port of the C library to SGI machines running
2423 Irix 4 (mips-sgi-irix4).
2425 * The new `lockf' function is a simplified interface to the locking
2426 facilities of `fcntl', included for compatibility.
2428 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2430 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2432 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2435 * The error message printed by `assert' for a failed assertion now includes
2436 the name of the program (if using GNU ld) and the name of the calling
2437 function (with versions of GCC that support this).
2439 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2441 * The library now includes the <sys/mman.h> header file and memory
2442 management functions `mmap', `munmap', `mprotect', `msync', and
2443 `madvise', on systems that support those facilities.
2445 * The interface for `mcheck' has changed slightly: the function called to
2446 abort the program when an allocation inconsistency is detected now takes
2447 an argument that indicates the type of failure. The new function
2448 `mprobe' lets you request a consistency check for a particular block at
2449 any time (checks are normally done only when you call `free' or `realloc'
2452 * It is now possible to easily cross-compile the C library, building on one
2453 system a library to run on another machine and/or operating system. All
2454 you need to do is set the variable `HOST_CC' in `configparms' to the
2455 native compiler for programs to run on the machine you are building on (a
2456 few generator programs are used on Unix systems); set `CC' to the
2459 * The new function `fexecve' (only implemented on the GNU system) executes
2460 a program file given a file descriptor already open on the file.
2464 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2465 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2467 * You can set the variable `libprefix' in `configparms' to specify a prefix
2468 to be prepended to installed library files; this makes it easy to install
2469 the GNU C library to be linked as `-lgnuc' or whatever.
2471 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2472 copies a limited number of characters from a string, and returns the
2473 address of the last character written.
2475 * You no longer need to check for whether the installed `stddef.h' is
2476 compatible with the GNU C library. configure now checks for you.
2478 * You can now define a per-stream `fileno' function to convert the
2479 stream's cookie into an integral file descriptor.
2481 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2482 allocates zero bytes of storage, and returns a unique pointer which
2483 you can pass to `realloc' or `free'. The behavior is undefined if
2484 you dereference this pointer.
2486 * The C library now runs on Sony NEWS m68k machines running either
2487 NewsOS 3 or NewsOS 4.
2489 * The new `syscall' function is a system-dependent primitive function
2490 for invoking system calls. It has the canonical behavior on Unix
2491 systems, including unreliable return values for some calls (such as
2492 `pipe', `fork' and `getppid').
2494 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2495 to `EAGAIN', which is the preferred name. On systems whose kernels
2496 use two distinct codes, the C library now translates EWOULDBLOCK to
2497 EAGAIN in every system call function.
2501 * The GNU C Library Reference Manual is now distributed with the library.
2502 `make dvi' will produce a DVI file of the printed manual.
2503 `make info' will produce Info files that you can read on line using C-h i
2504 in Emacs or the `info' program.
2505 Please send comments on the manual to bug-glibc-manual@gnu.org.
2507 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2509 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2511 * Jason Merrill has contributed a port to the Sequent Symmetry running
2512 Dynix version 3 (i386-sequent-dynix).
2514 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2515 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2517 * New function `memory_warnings' lets you arrange to get warnings when
2518 malloc is running out of memory to allocate, like Emacs gives you.
2520 * The C library now contains the relocating allocator used in Emacs 19 for
2521 its editing buffers. This allocator (ralloc) minimizes allocation
2522 overhead and fragmentation by moving allocated regions around whenever it
2523 needs to. You always refer to a ralloc'd region with a "handle" (a
2524 pointer to a pointer--an object of type `void **').
2526 * There is a new `printf' format: `%m' gives you the string corresponding
2527 to the error code in `errno'.
2529 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2530 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2531 pass, the `a' modifier says to fill in a `char **' you pass with a
2534 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2535 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2536 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2538 * `mkstemp' is a traditional Unix function to atomically create and open a
2539 uniquely-named temporary file.
2543 * The standard location for the file that says what the local timezone is
2544 has changed again. It is now `/usr/local/etc/localtime' (or more
2545 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2547 * The distribution no longer contains any files with names longer than 14
2550 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2551 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2553 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2557 * The configuration process has changed quite a bit. The `configure'
2558 script is now used just like the configuration scripts for other GNU
2559 packages. The `sysdeps' directory hierarchy is much rearranged.
2560 The file `INSTALL' explains the new scheme in detail.
2562 * The header files no longer need to be processed into ANSI C and
2563 traditional C versions. There is just one set of files to install, and
2564 it will work with ANSI or old C compilers (including `gcc -traditional').
2566 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2567 MIPS DECStation running Ultrix 4.
2569 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2570 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2571 made itself into a shared library.
2573 * Yet further improved support for the i386, running 4.3 BSD-like systems
2574 (such as Mach 3 with the Unix single-server), or System V.
2576 * New function `strncasecmp' to do case-insensitive string comparison
2577 with limited length.
2579 * New function `strsep' is a reentrant alternative to `strtok'.
2581 * New functions `scandir' and `alphasort' for searching directories.
2583 * New function `setenv' is a better interface to `putenv'.
2585 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2586 function for traversing a directory tree.
2588 * The GNU obstack package is now also part of the C library.
2589 The new function `open_obstack_stream' creates a stdio stream that
2590 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2591 formatted output directly to an obstack.
2593 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2594 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2596 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2598 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2599 things to your strings.
2601 * There are some new test programs: test-fseek, testmb, and testrand.
2603 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2604 These ports are not finished, but are a good starting place for really
2605 supporting those systems.
2607 * `/etc/localtime' is now the standard location for the file that says what
2608 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2609 This follows the general principle that `/etc' is the place for all local
2610 configuration files.
2612 * The C library header files now use `extern "C"' when used by the C++
2613 compiler, so the C library should now work with C++ code.
2615 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2616 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2619 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2620 function which uses the `merge sort' algorithm, and is said to be
2621 significantly faster than the old GNU `qsort' function. Merge sort is
2622 now the standard `qsort' function. The new algorithm can require a lot
2623 of temporary storage; so, the old sorting function is called when the
2624 required storage is not available.
2626 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2627 provides the Unix `crypt' function, plus some other entry points.
2629 * The code and header files taken from 4.4 BSD have been updated with the
2630 latest files released from Berkeley.
2632 ----------------------------------------------------------------------
2633 Copyright information:
2635 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2637 Permission is granted to anyone to make or distribute verbatim copies
2638 of this document as received, in any medium, provided that the
2639 copyright notice and this permission notice are preserved,
2640 thus giving the recipient permission to redistribute in turn.
2642 Permission is granted to distribute modified versions
2643 of this document, or of portions of it,
2644 under the above conditions, provided also that they
2645 carry prominent notices stating who last changed them.
2648 version-control: never