1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 4719, 13064, 14094, 14841, 14906, 15319, 15467, 15790, 15969, 16351,
13 16512, 16560, 16783, 16850, 17090, 17195, 17269, 17523, 17542, 17569,
14 17588, 17596, 17620, 17621, 17628, 17631, 17711, 17776, 17779, 17792,
15 17836, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967,
16 17969, 17978, 17987, 17991, 17996, 17998, 17999, 18019, 18020, 18029,
17 18030, 18032, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18068,
18 18080, 18093, 18100, 18104, 18110, 18111, 18128, 18138, 18185, 18197,
21 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
22 for LD and GD on x86 and x86-64, has been implemented. You will need
23 binutils-2.24 or later to enable this optimization.
25 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
26 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
27 Hat). These updates cause user visible changes, such as the fix for bug
33 * The following bugs are resolved with this release:
35 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
36 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
37 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
38 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
39 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
40 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
41 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
42 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
43 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
44 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
47 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
48 too little memory for the to-be-scanned arguments and overflow the
49 allocated buffer. The implementation now correctly computes the required
50 buffer size when using malloc, and switches to malloc from alloca as
53 * A new semaphore algorithm has been implemented in generic C code for all
54 machines. Previous custom assembly implementations of semaphore were
55 difficult to reason about or ensure that they were safe. The new version
56 of semaphore supports machines with 64-bit or 32-bit atomic operations.
57 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
58 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
60 * Port to Altera Nios II has been contributed by Mentor Graphics.
62 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
63 implementations for powerpc64/powerpc64le.
64 Implemented by Adhemerval Zanella (IBM).
66 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
67 and powerpc64le. This may improve lock scaling of existing programs on
68 HTM capable systems. The lock elision code is only enabled with
69 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
70 powerpc will issue a transaction abort on every syscall to avoid side
71 effects being visible outside transactions.
73 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
74 AArch64. Contributed by ARM Ltd.
76 * i386 memcpy functions optimized with SSE2 unaligned load/store.
78 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
79 under certain input conditions resulting in the execution of a shell for
80 command substitution when the application did not request it. The
81 implementation now checks WRDE_NOCMD immediately before executing the
82 shell and returns the error WRDE_CMDSUB as expected.
84 * CVE-2012-3406 printf-style functions could run into a stack overflow when
85 processing format strings with a large number of format specifiers.
87 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
88 infinite loop if the DNS response contained a PTR record of an unexpected
91 * The minimum GCC version that can be used to build this version of the GNU
92 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
93 still be used to compile programs using the GNU C Library.
95 * The GNU C Library is now built with -Werror by default. This can be
96 disabled by configuring with --disable-werror.
98 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
100 * The obsolete sigvec function has been removed. This was the original
101 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
102 programs have been using instead for about 25 years. Of course, ABI
103 compatibility for old binaries using sigvec remains intact.
105 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
106 with newer versions of bison.
108 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
109 The original MIPS o32 hard-float ABI requires an FPU where double-precision
110 registers overlay two consecutive single-precision registers. MIPS32R2
111 introduced a new FPU mode (FR=1) where double-precision registers extend the
112 corresponding single-precision registers which is incompatible with the
113 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
114 require the use of FR=1 making a transition necessary. New o32 ABI
115 extensions enable users to migrate over time from the original o32 ABI
116 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
117 tracks the ABI of any loaded object and verifies that new objects are
118 compatible. Mode transitions will also be requested as required and
119 unsupportable objects will be rejected. The ABI checks include both soft and
120 hard float ABIs for o32, n32 and n64.
122 GCC 5 with GNU binutils 2.25 onwards:
123 It is strongly recommended that all o32 system libraries are built using the
124 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
125 with the original and all new o32 ABI extensions. Configure a MIPS GCC
126 compiler using --with-fp-32=xx to set this by default.
130 * The following bugs are resolved with this release:
132 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
133 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
134 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
135 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
136 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
137 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
138 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
139 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
140 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
141 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
142 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
143 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
144 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
145 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
146 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
148 * Reverted change of ABI data structures for s390 and s390x:
149 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
150 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
151 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
152 are preserved pointing straight to the same implementation as the old ones.
153 Given that, new callers will simply provide a too-big buffer to these
154 functions. Any applications/libraries out there that embed jmp_buf or
155 ucontext_t in an ABI-relevant data structure that have already been rebuilt
156 against 2.19 headers will have to rebuilt again. This is necessary in any
157 case to revert the breakage in their ABI caused by the glibc change.
159 * Support for file description locks is added to systems running the
160 Linux kernel. The standard file locking interfaces are extended to
161 operate on file descriptions, not file descriptors, via the use of
162 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
163 are associated with an open file instead of a process.
165 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
167 * The minimum Linux kernel version that this version of the GNU C Library
168 can be used with is 2.6.32.
170 * Running the testsuite no longer terminates as soon as a test fails.
171 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
172 with PASS or FAIL lines for individual tests. A summary of the results is
173 printed, including a list of failing lists, and "make check" exits with
174 error status if there were any unexpected failures. "make check
175 stop-on-test-failure=y" may be used to keep the old behavior.
177 * The am33 port, which had not worked for several years, has been removed
180 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
181 supported; they now act the same as _DEFAULT_SOURCE (but generate a
182 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
183 conflicted with POSIX (support for which was removed in 2.19), the
184 interfaces those macros enabled remain available when compiling with
185 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
188 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
190 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
191 This may improve lock scaling of existing programs on TX capable systems.
192 The lock elision code is only built with --enable-lock-elision=yes and
193 then requires a GCC version supporting the TX builtins. With lock elision
194 default mutexes are elided via __builtin_tbegin, if the cpu supports
195 transactions. By default lock elision is not enabled and the elision code
198 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
199 copy the path argument. This allowed programs to cause posix_spawn to
200 deference a dangling pointer, or use an unexpected pathname argument if
201 the string was modified after the posix_spawn_file_actions_addopen
204 * All supported architectures now use the main glibc sysdeps directory
205 instead of some being in a separate "ports" directory (which was
206 distributed separately before glibc 2.17).
208 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
209 On configurations that support it (all Linux configurations), it's now
210 used regardless of the --enable-add-ons switch to configure. It is no
211 longer possible to build such configurations without pthreads support.
213 * Locale names, including those obtained from environment variables (LANG
214 and the LC_* variables), are more tightly checked for proper syntax.
215 setlocale will now fail (with EINVAL) for locale names that are overly
216 long, contain slashes without starting with a slash, or contain ".." path
217 components. (CVE-2014-0475) Previously, some valid locale names were
218 silently replaced with the "C" locale when running in AT_SECURE mode
219 (e.g., in a SUID program). This is no longer necessary because of the
222 * On x86-64, the dynamic linker's lazy-binding support is now compatible
223 with application code using Intel MPX instructions. (With all previous
224 versions, the MPX register state could be clobbered when making calls
225 into or out of a shared library.) Note that while the new dynamic
226 linker is compatible with all known x86 hardware whether or not it
227 supports Intel MPX, some x86 instruction-set emulators might fail to
228 handle the new instruction encodings. This is known to affect Valgrind
229 versions up through 3.9 (but will be fixed in the forthcoming 3.10
230 release), and might affect other tools that do instruction emulation.
232 * Support for loadable gconv transliteration modules has been removed.
233 The support for transliteration modules has been non-functional for
234 over a decade, and the removal is prompted by security defects. The
235 normal gconv conversion modules are still supported. Transliteration
236 with //TRANSLIT is still possible, and the //IGNORE specifier
237 continues to be supported. (CVE-2014-5119)
239 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
240 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
241 resulting a denial-of-service security vulnerability in applications which
242 use functions related to iconv. (CVE-2014-6040)
246 * The following bugs are resolved with this release:
248 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
249 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
250 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
251 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
252 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
253 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
254 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
255 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
256 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
257 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
258 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
259 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
260 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
261 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
262 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
263 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
264 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
265 16431, 16453, 16474, 16506, 16510, 16529
267 * Slovenian translations for glibc messages have been contributed by the
268 Translation Project's Slovenian team of translators.
270 * The public headers no longer use __unused nor __block. This change is to
271 support compiling programs that are derived from BSD sources and use
272 __unused internally, and to support compiling with Clang's -fblock
273 extension which uses __block.
275 * CVE-2012-4412 The strcoll implementation caches indices and rules for
276 large collation sequences to optimize multiple passes. This cache
277 computation may overflow for large collation sequences and may cause a
278 stack or buffer overflow. This is now fixed to use a slower algorithm
279 which does not use a cache if there is an integer overflow.
281 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
282 rules for large collation sequences to optimize multiple passes and falls
283 back to alloca if malloc fails, resulting in a possible stack overflow.
284 The implementation now falls back to an uncached collation sequence lookup
287 * CVE-2013-4788 The pointer guard used for pointer mangling was not
288 initialized for static applications resulting in the security feature
289 being disabled. The pointer guard is now correctly initialized to a
290 random value for static applications. Existing static applications need
291 to be recompiled to take advantage of the fix (bug 15754).
293 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
294 to the d_name member of struct dirent, or omit the terminating NUL
295 character. (Bugzilla #14699).
297 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
298 aligned_alloc functions could allocate too few bytes or corrupt the
299 heap when passed very large allocation size values (Bugzilla #15855,
302 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
303 for AF_INET6 has been fixed (Bugzilla #16072).
305 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
306 pap_CW, quz_PE, the_NP.
308 * Substantially revised locales: gd_GB, ht_HT
310 * The LC_ADDRESS field was updated to support country_car for almost all
313 * ISO 1427 definitions were updated.
315 * ISO 3166 definitions were updated.
317 * The localedef utility now supports --big-endian and --little-endian
318 command-line options to generate locales for a different system from that
319 for which the C library was built.
321 * Binary locale files now only depend on the endianness of the system for
322 which they are generated and not on other properties of that system. As a
323 consequence, binary files generated with new localedef may be incompatible
324 with old versions of the GNU C Library, and binary files generated with
325 old localedef may be incompatible with this version of the GNU C Library,
326 in the following circumstances:
328 + Locale files may be incompatible on m68k systems.
330 + Locale archive files (but not separate files for individual locales) may
331 be incompatible on systems where plain "char" is signed.
333 * The configure option --disable-versioning has been removed. Builds with
334 --disable-versioning had not worked for several years.
336 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
337 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
339 * SystemTap probes for malloc have been introduced.
341 * SystemTap probes for slow multiple precision fallback paths of
342 transcendental functions have been introduced.
344 * Support for powerpc64le has been added.
346 * The soft-float powerpc port now supports e500 processors.
348 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
350 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
351 set of header declarations that are enabled by default, even when other
352 feature test macros or compiler options such as -std=c99 would otherwise
353 disable some of those declarations.
355 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
356 conflict with POSIX. The libbsd-compat library (which was a dummy library
357 that did nothing) has also been removed.
359 * Preliminary documentation about Multi-Thread, Async-Signal and
360 Async-Cancel Safety has been added.
362 * Change of ABI data structures for s390 and s390x:
363 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
364 allow for future hardware extensions. All library functions that accept or
365 return these structures were versioned in order to provide backwards
366 compatibility with existing code. However, not all cases can be handled
367 with interface versioning. If an application embeds either structure into
368 another structure and that structure is passed to another compilation unit
369 which expects the newer larger-sized object then any access to the new
370 fields will result in undefined behaviour. Similarly any access to fields
371 that were moved by the enlarging of the structures will cause undefined
372 behaviour. To fix the undefined behaviour all objects that are part of the
373 final in-memory image must agree on the size of structures, and this may
374 require recompilation.
378 * The following bugs are resolved with this release:
380 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
381 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
382 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
383 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
384 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
385 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
386 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
387 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
388 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
389 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
390 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
391 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
392 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
395 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
396 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
397 Distributions can re-enable building and using pt_chown via the new configure
398 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
399 considerable security risks and should only be used if the distribution
400 understands and accepts the risks.
402 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
405 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
406 fixed (Bugzilla #15330).
408 * Add support for calling C++11 thread_local object destructors on thread
409 and program exit. This needs compiler support for offloading C++11
410 destructor calls to glibc.
412 * Improved worst case performance of libm functions with double inputs and
415 * Support for priority inherited mutexes in pthread condition variables on
416 non-x86 architectures.
418 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
420 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
422 * Optimized string functions for ARM. Implemented by Will Newton and
425 * Optimized libm functions for SPARC. Implemented by David S. Miller.
427 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
430 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
431 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
433 * Added a benchmark framework to track performance of functions in glibc.
435 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
436 It is based on draft TS 18661 and currently enabled as a GNU extension.
438 * On Linux, the clock function now uses the clock_gettime system call
439 for improved precision, rather than old times system call.
441 * Added support for version-3 tz format files. This is needed when using
442 the tz database release 2013e or later, and affects a few unusual cases --
443 currently only TZ='America/Godthab' for time stamps after 2037.
445 * Added new API functions pthread_getattr_default_np and
446 pthread_setattr_default_np to get and set the default pthread
447 attributes of a process.
449 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
450 This may improve lock scaling of existing programs on TSX capable systems.
451 When the --enable-lock-elision=yes parameter is specified at configure
452 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
455 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
456 availability). Implemented by Ryan S. Arnold.
458 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
462 * The following bugs are resolved with this release:
464 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
465 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
466 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
467 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
468 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
469 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
470 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
471 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
472 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
473 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
474 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
475 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
476 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
477 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
478 14879, 14889, 14893, 14898, 14914.
480 * Optimization of memcpy for MIPS.
482 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
483 EMFILE has been fixed (Bugzilla #14889).
485 * The add-on ports collection is now distributed in the "ports" subdirectory
486 of the main GNU C Library distribution, rather than separately.
488 * Port to ARM AArch64 contributed by Linaro.
490 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
491 Optimized versions of memcpy, memset, and memcmp added for System z10 and
493 Implemented by Andreas Krebbel.
495 * The new function secure_getenv allows secure access to the environment,
496 returning NULL if running in a SUID/SGID process. This function replaces
497 the internal function __secure_getenv.
499 * SystemTap static probes have been added into the dynamic linker.
500 Implemented by Gary Benson.
502 * Optimizations of string functions strstr, strcasestr and memmem.
503 Implemented by Maxim Kuvyrkov.
505 * The minimum Linux kernel version that this version of the GNU C Library
506 can be used with is 2.6.16.
508 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
509 powerpc POWER7. Implemented by Will Schmidt.
511 * New configure option --disable-nscd builds the C library such that it
512 never attempts to contact the Name Service Caching Daemon (nscd).
513 New configure option --disable-build-nscd avoids building nscd itself;
514 this is the default if --disable-nscd is used.
516 * Improved support for cross-compilation, including cross-testing and
517 bootstrap builds without a previously built glibc.
519 * Several testsuite tests are now able to test multiple IFUNC variants of an
520 interface, rather than just testing the one that would be chooen by
523 * New configure options --with-bugurl and --with-pkgversion, for
524 distributors to use to embed their bug-reporting and package version
525 information in --help and --version output.
527 * The ttyname and ttyname_r functions on Linux now fall back to searching for
528 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
529 allows creation of chroots without the procfs mounted on /proc.
531 * The `crypt' function now fails if passed salt bytes that violate the
532 specification for those values. On Linux, the `crypt' function will
533 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
534 enabled, and fail on encrypted strings using the MD5 or DES algorithm
535 when the mode is enabled.
537 * The `clock_*' suite of functions (declared in <time.h>) is now available
538 directly in the main C library. Previously it was necessary to link with
539 -lrt to use these functions. This change has the effect that a
540 single-threaded program that uses a function such as `clock_gettime' (and
541 is not linked with -lrt) will no longer implicitly load the pthreads
542 library at runtime and so will not suffer the overheads associated with
543 multi-thread support in other code such as the C++ runtime library.
545 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
550 * The following bugs are resolved with this release:
552 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
553 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
554 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
555 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
556 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
557 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
558 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
559 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
560 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
561 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
562 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
563 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
564 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
565 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
566 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
567 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
568 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
569 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
570 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
571 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
572 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
573 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
576 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
577 configuring glibc with:
578 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
579 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
580 Implemented by H.J. Lu.
584 + define static_assert
586 + do not declare gets
588 + declare at_quick_exit and quick_exit also for ISO C11
590 + aligned_alloc. NB: The code is deliberately allows the size parameter
591 to not be a multiple of the alignment. This is a moronic requirement
592 in the standard but it is only a requirement on the caller, not the
597 + uchar.h support added
599 + CMPLX, CMPLXF, CMPLXL added
601 Implemented by Ulrich Drepper.
603 * Support for the IA-64 has been moved to ports.
605 * Remove support for anything but ELF binary format
607 * Checking versions of poll, ppoll added.
608 Implemented by Ulrich Drepper.
610 * More generic and 64-bit performance optimizations to math functions.
611 Implemented by Ulrich Drepper.
613 * New configure option --enable-obsolete-rpc makes the deprecated RPC
614 headers and functions available at compile time as they were before
615 version 2.14. This option will be removed at some time in the future
616 after the TI-RPC library becomes fully sufficient for the needs of
617 existing applications.
619 * Compatibility code for Linux kernel versions before 2.4 has been removed.
620 Note that glibc is not expected to work with any Linux kernel version
623 * New header <sys/auxv.h> and function getauxval allowing easy access to
624 the AT_* key-value pairs passed from the Linux kernel. The header also
625 defines the HWCAP_* bits associated with the AT_HWCAP key.
627 * New locales: mag_IN
629 * New configure option --enable-systemtap builds SystemTap static probes
630 into libc for setjmp and longjmp and into libpthread for various operations.
631 So far the setjmp/longjmp probes and some of the libpthread probes are
632 provided only for i*86 and x86_64.
633 Implemented by Roland McGrath and Rayson Ho.
635 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
637 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
640 * More optimized functions for SPARC. Implemented by David S. Miller.
642 * Improved support for cross-compilation, especially bootstrap builds
643 without a previously built glibc.
645 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
646 Chris Metcalf from Tilera.
648 * Support for the old ARM ABI has been removed from ports. Only the EABI is
649 now supported for ARM processors.
651 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
652 as the name of the dynamic linker, to distinguish it from the
653 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
655 * Support for CRIS has been removed from ports.
657 * A new class of installed header has been documented for low-level
658 platform-specific functionality. PowerPC added the first instance with a
659 function to provide time base register access. Contributed by Tulio
660 Magno Quites Machado Filho.
662 * ix86 configurations now install header files that are consistent with
663 what x86-64 configurations install. These same header files can be used
664 for -m32, -m64, or -mx32 builds.
665 Contributed by H.J. Lu.
667 * Math library bug fixes. A thorough audit of all open math library bugs was
668 conducted by Joseph Myers. Significant progress was made on many math
669 library bugs resulting in more accurate exceptions and function results.
670 Many thanks to all those that contributed including Andreas Jaeger for his
671 patch review and work on the x87 trigonometric instruction issues.
673 * Timezone data is no longer installed. Timezone-related binaries and scripts
674 will continue to be installed. Users should obtain their timezone data from
675 their distribution provider or from the tzdata package at
676 <ftp://munnari.oz.au/pub/>.
680 * The following bugs are resolved with this release:
682 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
683 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
684 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
685 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
686 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
687 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
688 13484, 13506, 13515, 13523, 13524, 13538, 13540
690 * New program pldd to list loaded object of a process
691 Implemented by Ulrich Drepper.
693 * Add nss_db support back to glibc. No more dependency on Berkeley db
694 and support for initgroups lookups.
695 Implemented by Ulrich Drepper.
697 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
698 Contributed by HJ Lu.
700 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
701 Contributed by HJ Lu.
703 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
704 on x86-32 and x86-64.
705 Contributed by Liubov Dmitrieva.
707 * Optimized strchr and strrchr for SSE on x86-32.
708 Contributed by Liubov Dmitrieva.
710 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
711 for x86-64 and x86-32.
712 Contributed by Liubov Dmitrieva.
714 * New interfaces: scandirat, scandirat64
715 Implemented by Ulrich Drepper.
717 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
718 Implemented by Ulrich Drepper.
720 * nscd now also caches the netgroup database.
721 Implemented by Ulrich Drepper.
723 * Integrate libm with gcc's -ffinite-math-only option.
724 Implemented by Ulrich Drepper.
726 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
727 to math functions. Implemented by Ulrich Drepper.
729 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
730 Implemented by Ulrich Drepper.
732 * New Linux interfaces: process_vm_readv, process_vm_writev
734 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
735 Implemented by Ulrich Drepper.
737 * Optimized nearbyint and strcasecmp for PPC.
738 Implemented by Adhemerval Zanella.
740 * New locales: bho_IN, unm_US, es_CU, ta_LK
744 * The following bugs are resolved with this release:
746 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
747 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
748 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
749 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
750 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
751 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
752 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
753 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
754 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
755 12795, 12811, 12813, 12814, 12841
757 * The RPC implementation in libc is obsoleted. Old programs keep working
758 but new programs cannot be linked with the routines in libc anymore.
759 Programs in need of RPC functionality must be linked against TI-RPC.
760 The TI-RPC implementation is IPv6 enabled and there are other benefits.
762 Visible changes of this change include (obviously) the inability to link
763 programs using RPC functions without referencing the TI-RPC library and the
764 removal of the RPC headers from the glibc headers.
765 Implemented by Ulrich Drepper.
767 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
768 syncfs, setns, sendmmsg
770 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
771 yue_HK, lij_IT, mhr_RU
773 * New encodings: CP770, CP771, CP772, CP773, CP774
775 * New program sotruss to trace calls through PLTs
776 Implemented by Ulrich Drepper.
778 * The malloc hook implementation is marked deprecated and will be removed
779 from the default implementation in the next version. The design never
780 worked ever since the introduction of threads. Even programs which do
781 not create threads themselves can use multiple threads created internally.
785 * The following bugs are resolved with this release:
787 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
788 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
789 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
790 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
793 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
795 * POWER7 optimizations: memset, memcmp, strncmp
797 * New optimized string functions for x86-64: strnlen (SSE2),
798 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
799 Implemented by Ulrich Drepper.
803 * The following bugs are resolved with this release:
805 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
806 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
807 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
808 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
809 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
810 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
811 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
812 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
814 * New interfaces: pthread_getname_np, pthread_setname_np
816 * New Linux interface: recvmmsg
818 * STT_GNU_IFUNC implemented for Sparc by David Miller.
820 * The dynamic linker now recognizes supported ABI versions from the
821 EI_ABIVERSION field in the ELF header.
822 Implemented by Ulrich Drepper.
824 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
825 will not be used to fill in password fields in the passwd.byname replies.
826 Instead it is used to synthesize the shadow.byname table, should it be
827 missing. This is a useful mode in some installations involving Solaris.
828 Implemented by Ulrich Drepper.
830 * New locales: kok_IN, sq_MK, cv_RU
834 * The following bugs are resolved with this release:
836 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
837 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
838 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
839 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
840 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
841 10789, 10817, 10823, 10840, 10847
843 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
845 Implemented by Ulrich Drepper.
847 * Checking version of longjmp added that fails if an uninitialized stack
848 frame would be created. Implemented by Ulrich Drepper.
850 * STT_GNU_IFUNC is now supported in static executables.
851 Implemented by H.J. Lu.
853 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
855 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
856 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
857 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
858 Contributed by H.J. Lu.
860 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
861 Implemented by Ulrich Drepper.
863 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
865 Contributed by H.J. Lu.
867 * Support for fma instruction in AVX on x86-64.
868 Implemented by H.J. Lu and Ulrich Drepper.
870 * AVX support in x86-64 auditing support in ld.so.
871 Implemented by H.J. Lu.
873 * STB_GNU_UNIQUE support added.
874 Implemented by Ulrich Drepper.
876 * Implement second fallback mode for optimized DNS lookup for even more
877 broken environments. If two requests from the same port are not
878 handled correctly close the socket and open a new one before sending
879 the second request. The 'single-request-reopen' option in /etc/resolv.conf
880 can be used to select this mode right away, instead of rediscovering the
881 necessity is every process again.
882 Implemented by Ulrich Drepper.
884 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
885 Implemented by Adam Tkac.
887 * Optimized iconv conversions for S390x.
888 Implemented by Andreas Krebbel.
890 * Using condvars with PI mutexes is now more efficient due to kernel
891 support for requeueing to PI futexes. NPTL support added for x86-64.
892 Implemented by Ulrich Drepper.
894 * New locales: ps_AF, my_MM
898 * The following bugs are resolved with this release:
900 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
901 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
902 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
903 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
904 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
906 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
907 Implemented by Ulrich Drepper.
909 * New Linux interfaces: accept4, fallocate, fallocate64.
910 Implemented by Ulrich Drepper.
912 * Correct declarations of string function when used in C++ code. This
913 could lead to compile errors for invalid C++ code.
915 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
918 * New POSIX 2008 interface: psiginfo
919 Implemented by Ulrich Drepper.
921 * New ISO C++1x interfaces: quick_exit, at_quick_exit
922 Implemented by Ulrich Drepper.
924 * Support for selecting between multiple function definitions at runtime
925 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
927 * The libcrypt library can now use the hash function implementations in
928 NSS. Implemented by Ulrich Drepper.
930 * The malloc implementation can be compiled to be less memory efficient
931 but higher performing in multi-threaded programs.
932 Implemented by Ulrich Drepper.
934 * New locales: nan_TW@latin, ks_IN
936 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
937 Implemented by Ulrich Drepper.
939 * Extended printf hook support. It is possible to use user-defined types
940 and extend existing format specifiers.
941 Implemented by Ulrich Drepper.
943 * Handling for group shadow files has been added.
944 Implemented by Ulrich Drepper.
946 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
947 servers (the case, e.g., for some people using the built-in DNS
948 server in ADSL modems/routers). There is a once-per-process timeout
949 in case of a broken server. To avoid it, users can run nscd or put
950 'options single-request' in /etc/resolv.conf.
951 Implemented by Ulrich Drepper.
955 * The following bugs are resolved with this release:
957 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
958 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
959 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
960 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
961 6968, 6974, 6980, 6995, 7008, 7009, 7029
963 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
964 up at the same time. Implemented by Ulrich Drepper.
966 * TLS descriptors for LD and GD on x86 and x86-64.
967 Implemented by Alexandre Oliva.
969 * getaddrinfo now handles DCCP and UDPlite.
970 Implemented by Ulrich Drepper.
972 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
973 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
974 Implemented by Ulrich Drepper.
976 * New implementation of memmem, strstr, and strcasestr which is O(n).
977 Implemented by Eric Blake.
979 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
981 * Implement "e" option for popen to open file descriptor with the
982 close-on-exec flag set. Implemented by Ulrich Drepper.
984 * Implement "b" mode for fmemopen. In this mode writes writes don't
985 implicitly add a NUL byte and seeks from the end of the buffer really
986 use the buffer end, not the string length as the basis.
987 Implemented by Ulrich Drepper.
989 * Many functions, exported and internal, now atomically set the close-on-exec
990 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
992 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
994 Implemented by Pravin Satpute.
996 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1000 * The following bugs are resolved with this release:
1002 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1003 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1004 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1005 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1006 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1007 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1008 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1010 * New locales: bo_CN, bo_IN, shs_CA.
1012 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1014 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1015 Implemented by Pravin Satpute.
1017 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1019 * nscd caches now all timeouts for DNS entries
1020 Implemented by Ulrich Drepper.
1022 * nscd is more efficient and wakes up less often.
1023 Implemented by Ulrich Drepper.
1025 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1026 vdprintf, and obstack_vprintf.
1027 Implemented by Jakub Jelinek.
1029 * Faster memset for x86-64.
1030 Implemented by Harsha Jagasia and H.J. Lu.
1032 * Faster memcpy on x86.
1033 Implemented by Ulrich Drepper.
1035 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1036 Implemented by Ulrich Drepper.
1038 * Faster sqrt and sqrtf implemention for some PPC variants.
1039 Implemented by Steven Munroe.
1043 * The following bugs are resolved with this release:
1045 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1046 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1047 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1048 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1049 5071, 5103, 5104, 5112, 5113, 5184, 5186
1051 * More checking functions: fread, fread_unlocked, open*, mq_open.
1052 Implemented by Jakub Jelinek and Ulrich Drepper.
1054 * Extend fortification to C++. Implemented by Jakub Jelinek.
1056 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1057 by not recognizing 'a' as a modifier when those specs are requested.
1058 Implemented by Jakub Jelinek.
1060 * PPC optimizations to math and string functions.
1061 Implemented by Steven Munroe.
1063 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1064 options to be passed. Implemented by Ulrich Drepper.
1066 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1068 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1069 Implemented by Ulrich Drepper.
1071 * Handle private futexes in the NPTL implementation.
1072 Implemented by Jakub Jelinek and Ulrich Drepper.
1074 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1075 Implemented by Roland McGrath and Ulrich Drepper.
1077 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1079 * SHA-256 and SHA-512 based password encryption.
1080 Implemented by Ulrich Drepper.
1082 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1083 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1086 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1087 Implemented by Ulrich Drepper.
1091 * The following bugs are resolved with this release:
1093 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1094 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1095 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1096 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1097 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1098 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1099 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1102 * New Linux interfaces: epoll_pwait, sched_getcpu.
1104 * New generic interfaces: strerror_l.
1106 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1110 * The following bugs are resolved with this release:
1112 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1113 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1114 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1115 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1116 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1117 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1118 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1119 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1120 3225, 3251, 3252, 3253, 3273
1122 * For Linux, the sorting of addresses returned by getaddrinfo now also
1123 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1124 Implemented by Ulrich Drepper.
1126 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1127 Implemented by Ulrich Drepper.
1129 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1131 * New iconv module for MIK. Contributed by Alexander Shopov.
1133 * For sites with broken group and/or passwd database, the auto-propagate
1134 option of nscd can prevent creating ID lookup entries from the results
1135 of a name lookup and vice versa. This usually is no problem but some
1136 site might have problems with the default behavior.
1137 Implemented by Ulrich Drepper.
1139 * Iterating over entire database in NIS can be slow. With the
1140 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1141 to trade time for memory. The entire database will be read at once.
1142 Implemented by Ulrich Drepper.
1144 * The interfaces introduced in RFC 3542 have been implemented by
1147 * Support for the new ELF hash table format was added by Ulrich Drepper.
1149 * Support for priority inheritance mutexes added by Jakub Jelinek and
1152 * Support for priority protected mutexes added by Jakub Jelinek.
1154 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1155 or_IN, csb_PL, fy_NL, sr_ME.
1159 * More overflow detection functions.
1161 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1162 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1164 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1165 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1166 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1167 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1168 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1169 by Masahide Washizawa.
1171 * It is now possible to install audit libraries for the dynamic linker using
1172 LD_AUDIT. Implemented by Ulrich Drepper.
1174 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1175 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1176 For a libc and libpthread that works well on Linux 2.4 kernels, we
1177 recommend using the stable 2.3 branch.
1179 * The new function open_wmemstream acts like open_memstream,
1180 but uses a wchar_t wide character buffer.
1182 * The new function ppoll is an improved version of poll, similar to pselect.
1184 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1185 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1186 renameat, unlinkat, linkat, symlinkat, readlinkat.
1188 * New Linux kernel system calls: unshare,
1189 inotify_init, inotify_add_watch, inotify_rm_watch.
1191 * The euidaccess function is now also known by the alias eaccess,
1192 for compatibility with some other systems.
1194 * Timezone data updated to 2006b version.
1198 * The following bugs are resolved with this release:
1200 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1201 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1202 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1203 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1204 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1205 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1207 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1209 * As of this release, GCC 4 can be used to compile the C Library.
1211 * Timezone data updated to 2005m version.
1215 * The following bugs are resolved with this release:
1217 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1218 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1219 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1220 777, 787, 821, 822, 823, 825
1222 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1226 * Support for RFC 3678. Real implementations exist only for Linux so far.
1227 Implemented by Ulrich Drepper.
1229 * nscd can now cache entries persistently. Expiring entries are reloaded.
1230 For speedups the cache can be shared in memory with client processes.
1231 Implemented by Ulrich Drepper.
1233 * nscd can now perform SELinux checks.
1234 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1236 * getaddrinfo queries are now cached. Canonical name lookup is performed
1238 Implemented by Ulrich Drepper.
1240 * The nothrow function attribute is used when headers are used by gcc when
1241 compiling C code. This can avoid significant amounts of exception
1244 * The malloc functions perform more error checking and are stricter when
1245 it comes to reacting on errors. The default action is to terminate
1246 the process after showing an error message. Implemented by Ulrich Drepper.
1248 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1249 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1251 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1252 namespaces using the new function dlmopen(). This feature is of course,
1253 like most other dynamic loading functionality, not available in statically
1254 linked applications. Implemented by Ulrich Drepper.
1256 * Low-overhead boundary checking variants of string and some stdio functions
1257 were added. These are to be used in conjunction with a gcc patch by
1258 Jakub Jelinek which adds calls to these functions if possible.
1259 Implemented by Jakub Jelinek and Ulrich Drepper.
1261 * Old code for several operating systems and machine architectures that
1262 have not been in working condition in a long time have been removed from
1263 the main source tree maintained by the GNU C Library's maintainers.
1264 These files are now reside in the separate `ports' source module
1265 that is usable as an add-on when building the library.
1269 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1270 interrogate the dynamic linker, compatible with the Solaris interface.
1272 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1273 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1275 * getifaddrs now uses the netlink interface on Linux to get its information.
1276 Implemented by Thorsten Kukuk.
1278 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1279 Implemented by Ulrich Drepper.
1281 * support for non-executable stacks on x86 has been added. Changes mostly
1284 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1287 * getaddrinfo now performs destination address selection according to
1292 * Thread-safe interfaces for many functions that access locale data
1293 were added in version 2.3, but these features were omitted from NEWS.
1294 Many functions have variants with an `_l' suffix that take a `locale_t'
1295 object as a parameter rather than consulting the current locale.
1296 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1297 create and maintain `locale_t' objects. Additionally, the new function
1298 `uselocale' sets "the current locale" (as used by functions not so
1299 parameterized) set for an individual thread. These features were added
1300 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1302 * The functions getresuid, getresgid, setresuid, and setresgid, which
1303 have long been available on Linux, are now declared in <unistd.h>
1304 and are now also available on the Hurd.
1306 * ELF thread-local storage support (TLS) now works on x86-64.
1308 * The new dynamic string token $LIB is expanded in shared library names.
1309 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1311 * Aldy Hernandez contributed complete software floating point support for
1312 PowerPC machines with no FPU.
1314 * fexecve is implemented on Linux.
1316 * The `btowc' function should work at least twice as fast due to
1317 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1319 * With approriate thread add-ons cancelable functions are now implemented
1320 in libc.so as well. No need to call the function in libpthread. This
1321 change allowed to finally disable the incorrect and expensive handling
1322 of weak definition in ld.so.
1324 * Yet more PLT entries in libc.so have been removed. We finally arrived
1325 at the bare minimum. Startup times improved appropriately.
1327 * Support for the new Linux/x86 system call interface was added. The
1328 AT_SYSINFO auxiliary vector entry is recognized and handled.
1332 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1335 * iconv (the program and the interface) now accepts empty names (excluding
1336 options like //TRANSLIT) to mean "use charset of current locale".
1338 * localedef can now transliterate characters in strings which are not in
1339 the provided charmap. The information from the input locale is used.
1341 * Prelinking support was added for ELF targets. This requires additional
1342 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1344 * Read-only stdio streams now use mmap to speed up operation by eliminating
1345 copying and buffer underflows. To use add 'm' to the mode string of
1346 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1348 * The malloc functions were completely rewritten by Wolfram Gloger based
1349 on Doug Lea's malloc-2.7.0.c.
1351 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1352 implementation of regex.
1354 * Bruno Haible upgraded the iconv and locale implementation to support
1357 * Contents of the LC_* and LANG environment variables in the CEN style are
1358 not recognized anymore. It never was used. Change by Ulrich Drepper.
1360 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1361 thread-local storage (TLS) ABI on some platforms.
1362 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1364 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1365 EUC-JISX0213, and TSCII.
1367 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1368 BSD-compatible interface for getting all network interface addresses.
1369 Implementation for IPv4 by Roland McGrath.
1371 * Loading of locale data is faster due to the introduction of a locale
1372 archive. Implemented by Roland McGrath and Ulrich Drepper.
1374 * Startup times are significantly reduced by not using exported functions
1375 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1378 * Steven Munroe contributed a port to PowerPC64/Linux.
1382 * The Hurd now uses the GNU libio implementation of stdio rather than the
1383 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1385 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1386 with the same behavior as the Linux system call of the same name.
1390 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1391 128-bit long double format.
1393 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1394 IBM1161, and IBM1162 charsets.
1396 * Andreas Jaeger contributed a port to x86-64/Linux.
1398 * Peter Bruin contributed a port to PowerPC/Hurd.
1400 * libc functions using I/O streams now can handle wide-oriented streams
1403 * optimizations in the dynamic linker. Binaries created by recent binutils
1404 versions start up quicker due to reduced time spent on relocations.
1406 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1410 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1411 asinh, atanh, j0 for the 128-bit long double format.
1413 * Bruno Haible updated all the code handling Unicode in some form to
1414 support Unicode 3.1.
1416 * Speed of regex for single-byte locales is back to previous levels.
1417 Patch by Isamu Hasegawa.
1419 * Alpha, SPARC, and IA-64 now also using floating stacks.
1421 * Startup time of internationalized applications greatly improved through
1422 iconv cache. Use iconvconfig to generate the cache file.
1423 Contributed by Ulrich Drepper.
1425 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1426 severe performance problems. Patch by David Mosberger.
1428 * The Hurd port got a lot more functionality like AIO, various stdio
1429 extensions, etc. Mainly done by Roland McGrath.
1431 * mtrace can now lookup symbols in shared libraries.
1435 * Intel's IA-64 math library is largely integrated. It provides fast and
1436 accurate implementatations for most basic and standard math functions
1437 in float, double, and long double format.
1439 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1440 and asin for the 96-bit long double format and asin, log, tan for the
1441 128-bit long double format.
1443 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1444 The basic double functions exist today. Contributed by Abraham Ziv
1445 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1446 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1448 * An asynchronous name lookup library was added. The interface is designed
1449 after POSIX AIO. The proposal was circulated beforehand to get comments.
1450 No negative ones came in. Implemented by Ulrich Drepper.
1452 * Port to S390/64bit contributed by Martin Schwidefsky
1453 <schwidefsky@de.ibm.com>.
1455 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1456 of functions for Linux/IA-64.
1458 * The RPC code is now thread safe. Threads can now use the same service
1459 of different services at the same time. Patch by Eric Norum
1460 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1462 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1463 family of functions for Linux/S390.
1465 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1466 of functions for Linux/x86.
1468 * Port to Linux/CRIS contributed by Axis Communications.
1472 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1473 we can now check for namespace violations and missing declarations. The
1474 result is that almost all headers are now Unix-compliant (as defined in
1475 the upcoming XPG6). The negative side is that some programs might need
1476 corrections, too, if they depend on the incorrect form of the headers in
1477 previous versions which defined too many symbols and included too many
1480 * regex now handles multibyte character sets correctly.
1481 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1483 * iconv (the program) does now conform to the upcoming XPG6 and handles
1484 charmaps. Instead of the charset names the path of charmaps can be
1485 provided and the conversion happens based on this data.
1486 Contributed by Ulrich Drepper.
1488 * The locale program now provides detailed information about the installed
1493 only lists the names of the supported locales
1497 provides details such as country, language, and codeset name.
1498 Contributed by Ulrich Drepper.
1502 * The gencat program now parses the input file according to the charset
1503 selected by the LC_CTYPE category. This is important for stateful
1504 character sets. To make generating catalogs easier there is a way
1505 to overwrite the charset selected by the locale: before the first
1506 message or $ quote line the catalog can contain a line like
1508 $ codeset=ISO-8859-2
1510 to select the charset (ISO-8859-2 in this case).
1512 Implemented by Shinya Hanataka and Ulrich Drepper.
1514 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1515 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1516 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1518 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1519 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1521 * The LANGUAGE environment variable is now ignored unless the locale is
1522 changed from the default "C" locale.
1524 * The usual bug fixes.
1528 * Greg McGary added runtime support for bounds checking using gcc's
1529 new -fbounded-pointers option. ix86 target is complete. PowerPC
1532 * Thorsten Kukuk added secure mode support to nscd.
1534 * The Berkeley db libraries have been removed.
1536 Related, the nss_db module is now in a separate package since it
1537 obviously requires a database library being available.
1539 * Wide character I/O streams implemented by Ulrich Drepper.
1541 * Functions from the extended socket API added by Ulrich Drepper.
1543 * Functions feenableexcept and fedisableexcept to control the
1544 behaviour of individual exceptions have been added by Andreas Jaeger.
1546 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1548 * The resolver code has been updated from bind 8.2.3-T5B which supports
1549 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1552 This change could in some situations effect backward compatibility. Since
1553 now `_res' is a thread-local instead of a global variable, modifying it
1554 in one thread does not have any effect in other threads.
1556 The resolver library was also extended to allow IPv6 as the transport
1557 protocol for the requests. This work was done by Stig Venaas.
1559 * Compatibility code for K&R C compilers has been removed from the
1560 header files. A ISO C compiler is needed to use the library
1561 (conforming to either C89 or C99 standard).
1563 * Complete rewrite of the localedef program to support multibyte character
1564 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1565 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1566 Implemented by Ulrich Drepper.
1568 Bruno Haible significantly improved the generation and use of the data
1569 structures for the wide character tables.
1571 * Plural handling in gettext implemented by Ulrich Drepper.
1573 * The utmp daemon has been removed.
1575 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1577 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1580 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1582 * POSIX barriers implemented by Kaz Kylheku.
1584 * POSIX spawn function family implemented by Ulrich Drepper.
1586 * POSIX spinlocks are now available.
1588 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1590 * the configure option --enable-kernel=X.Y.Z allows to strip out
1591 compatibility for kernel versions before X.Y.Z. This is currently only
1592 implemented for Linux.
1594 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1595 field sin6_scope_id. This means that all programs using IPv6 should be
1596 recompiled. Don't expect binary compatibility with previous glibc
1599 * various conversion modules for IBM character sets contributed by
1602 * IA-64 port by Jes Sorensen and HJ Lu.
1616 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1618 * New xdr functions are added; some rpc functions are now 64bit clean.
1620 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1622 * Fixed known incompatibilities with glibc 2.0.
1624 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1626 * Optimized a number of functions (especially the ELF dynamic loader).
1628 * Update timezone data files.
1630 * lots of charmaps corrections
1632 * some new locale definitions and charmaps
1637 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1638 conform to POSIX member type requirements. Symbol versions have been
1639 adjusted as needed within the library, and for direct use by applications,
1640 but there is potential for problems if third-party libraries use
1641 struct timeval as part of their interface. This does not present
1642 a problem for X and other "essential" system libraries.
1644 * An additional locale model to support C++ Standard Library locale
1645 model and probably more was implemented by Ulrich Drepper.
1647 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1650 * Miles Bader provided the `argp' function family to support hierachical
1651 command line argument parsing, layered on top of getopt.
1653 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1655 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1658 * scanf recognizes the %a and %A format for scanning floating point numbers.
1660 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1661 information and interfaces for the available integer types.
1663 * about 130 new math functions were added to implement the ISO C9x math
1666 * the new header <complex.h> contains definitions of the complex math
1667 functions from ISO C 9X.
1669 * the new header <tgmath.h> defines generic macros to use complex or
1670 real valued functions.
1672 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1674 * Andreas Jaeger provided a test suite for the math library.
1676 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1678 * Ulrich Drepper added character set conversion functions (iconv).
1680 * Optimized string functions have been added.
1682 * The localedata addon is now part of glibc.
1684 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1686 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1687 daemon for NSS (nscd).
1689 Missing a better place here are some numbers on improvements. Under
1690 Linux 2.1.125 un-tar-ing the kernel sources takes
1694 using local files 12.19s 6.88s 22.91s
1696 using NIS 13.92s 8.91s 26.34s
1698 using NIS & nscd 10.37s 7.34s 25.30s
1700 using NIS+ 27.57s 30.37s 640.46s
1702 using NIS+ & nscd 10.25s 7.83s 26.51s
1704 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1706 Keep in mind that non-namelookup related operations dominate above times.
1707 It was just a common complain that using NIS+ unpacking the kernel is
1710 [1] The old nscd implementation is not available anymore since it was
1711 distributed with glibc up to version 2.0.98 and thus is now replaced.
1713 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1715 * Mark Kettenis provided a Hesiod NSS module.
1717 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1718 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1720 * rcmd can now handle netgroups (Dick Streefland).
1722 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1725 * Support for the IPv6 protocol has been added to the socket API, as per the
1726 latest draft standards.
1728 * Support for Linux 2.2 has been added.
1730 * Interface changes relative to the latest 2.0.x release:
1731 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1732 addseverity NEW: Unix98
1733 alphasort64 NEW: LFS
1734 argp_err_exit_status NEW: argp, GNU ext
1735 argp_error NEW: argp, GNU ext
1736 argp_failure NEW: argp, GNU ext
1737 argp_help NEW: argp, GNU ext
1738 argp_parse NEW: argp, GNU ext
1739 argp_program_bug_address NEW: argp, GNU ext
1740 argp_program_version NEW: argp, GNU ext
1741 argp_program_version_hook NEW: argp, GNU ext
1742 argp_state_help NEW: argp, GNU ext
1743 argp_usage NEW: argp, GNU ext
1744 authdes_create NEW: Secure RPC
1745 authdes_getucred NEW: Secure RPC
1746 authdes_pk_create NEW: Secure RPC
1747 backtrace NEW: GNU ext.
1748 backtrace_symbols NEW: GNU ext.
1749 backtrace_symbols_fd NEW: GNU ext.
1751 cacosf NEW: ISO C 9x
1752 cacosh NEW: ISO C 9x
1753 cacoshf NEW: ISO C 9x
1754 cacoshl NEW: ISO C 9x
1755 cacosl NEW: ISO C 9x
1762 casinf NEW: ISO C 9x
1763 casinh NEW: ISO C 9x
1764 casinhf NEW: ISO C 9x
1765 casinhl NEW: ISO C 9x
1766 casinl NEW: ISO C 9x
1768 catanf NEW: ISO C 9x
1769 catanh NEW: ISO C 9x
1770 catanhf NEW: ISO C 9x
1771 catanhl NEW: ISO C 9x
1772 catanl NEW: ISO C 9x
1773 cbc_crypt NEW: Secure RPC
1777 ccoshf NEW: ISO C 9x
1778 ccoshl NEW: ISO C 9x
1784 cimagf NEW: ISO C 9x
1785 cimagl NEW: ISO C 9x
1786 clearerr_locked REMOVED
1787 clntunix_create NEW: sunrpc ext
1789 clog10 NEW: ISO C 9x
1790 clog10f NEW: ISO C 9x
1791 clog10l NEW: ISO C 9x
1801 cprojf NEW: ISO C 9x
1802 cprojl NEW: ISO C 9x
1804 crealf NEW: ISO C 9x
1805 creall NEW: ISO C 9x
1810 csinhf NEW: ISO C 9x
1811 csinhl NEW: ISO C 9x
1814 csqrtf NEW: ISO C 9x
1815 csqrtl NEW: ISO C 9x
1819 ctanhf NEW: ISO C 9x
1820 ctanhl NEW: ISO C 9x
1822 des_setparity NEW: Secure RPC
1823 ecb_crypt NEW: Secure RPC
1824 endutxent NEW: Unix98
1826 exp10f NEW: ISO C 9x
1827 exp10l NEW: ISO C 9x
1831 fattach NEW: STREAMS
1832 fdetach NEW: STREAMS
1836 feclearexcept NEW: ISO C 9x
1837 fegetenv NEW: ISO C 9x
1838 fegetexceptflag NEW: ISO C 9x
1839 fegetround NEW: ISO C 9x
1840 feholdexcept NEW: ISO C 9x
1842 feraiseexcept NEW: ISO C 9x
1843 ferror_locked REMOVED
1844 fesetenv NEW: ISO C 9x
1845 fesetexceptflag NEW: ISO C 9x
1846 fesetround NEW: ISO C 9x
1847 fetestexcept NEW: ISO C 9x
1848 feupdateenv NEW: ISO C 9x
1849 fflush_locked REMOVED
1853 fgets_unlocked NEW: GNU ext.
1854 fileno_locked REMOVED
1866 fputc_locked REMOVED
1867 fputs_unlocked NEW: GNU ext.
1868 fread_unlocked NEW: GNU ext.
1873 fstatvfs NEW: Unix98
1877 ftruncate64 NEW: LFS
1879 fwrite_unlocked NEW: GNU ext.
1880 gai_strerror NEW: IPv6
1884 getchar_locked REMOVED
1886 getdate_err NEW: Unix98
1887 getdate_r NEW: GNU ext.
1889 getnameinfo NEW: IPv6
1890 getnetname NEW: Secure RPC
1891 getpmsg NEW: STREAMS
1892 getpt NEW: Unix98 PTY
1893 getrlimit64 NEW: LFS
1894 getutxent NEW: Unix98
1895 getutxid NEW: Unix98
1896 getutxline NEW: Unix98
1897 glob64 NEW: GNU ext.
1898 globfree64 NEW: GNU ext.
1899 gnu_get_libc_release NEW: GNU ext.
1900 gnu_get_libc_version NEW: GNU ext.
1901 grantpt NEW: Unix98 PTY
1902 host2netname NEW: Secure RPC
1904 iconv_close NEW: iconv
1905 iconv_open NEW: iconv
1906 if_freenameindex NEW: IPv6
1907 if_indextoname NEW: IPv6
1908 if_nameindex NEW: IPv6
1909 if_nametoindex NEW: IPv6
1910 in6addr_any NEW: IPv6
1911 in6addr_loopback NEW: IPv6
1912 inet6_isipv4mapped NEW: IPv6
1913 isastream NEW: STREAMS
1914 iswblank NEW: GNU ext.
1915 key_decryptsession NEW: Secure RPC
1916 key_decryptsession_pk NEW: Secure RPC
1917 key_encryptsession NEW: Secure RPC
1918 key_encryptsession_pk NEW: Secure RPC
1919 key_gendes NEW: Secure RPC
1920 key_get_conv NEW: Secure RPC
1921 key_secretkey_is_set NEW: Secure RPC
1922 key_setnet NEW: Secure RPC
1923 key_setsecret NEW: Secure RPC
1924 llrint NEW: ISO C 9x
1925 llrintf NEW: ISO C 9x
1926 llrintl NEW: ISO C 9x
1927 llround NEW: ISO C 9x
1928 llroundf NEW: ISO C 9x
1929 llroundl NEW: ISO C 9x
1934 lrintf NEW: ISO C 9x
1935 lrintl NEW: ISO C 9x
1936 lround NEW: ISO C 9x
1937 lroundf NEW: ISO C 9x
1938 lroundl NEW: ISO C 9x
1940 makecontext NEW: Unix98
1941 mempcpy NEW: GNU ext.
1944 modify_ldt NEW: kernel
1948 nearbyint NEW: ISO C 9x
1949 nearbyintf NEW: ISO C 9x
1950 nearbyintl NEW: ISO C 9x
1951 netname2host NEW: Secure RPC
1952 netname2user NEW: Secure RPC
1953 nexttoward NEW: ISO C 9x
1954 nexttowardf NEW: ISO C 9x
1955 nexttowardl NEW: ISO C 9x
1959 passwd2des NEW: Secure RPC
1961 pow10f NEW: GNU ext.
1962 pow10l NEW: GNU ext.
1965 printf_size NEW: GNU ext.
1966 printf_size_info NEW: GNU ext.
1967 profil_counter REMOVED
1968 pthread_mutexattr_getkind_np REPLACED
1969 pthread_mutexattr_setkind_np REPLACED
1970 ptsname NEW: Unix98 PTY
1971 ptsname_r NEW: Unix98 PTY
1973 putchar_locked REMOVED
1974 putgrent NEW: GNU ext.
1976 putpmsg NEW: STREAMS
1977 pututxline NEW: Unix98
1981 readdir64_r NEW: LFS
1982 remquo NEW: ISO C 9x
1983 remquof NEW: ISO C 9x
1984 remquol NEW: ISO C 9x
1986 roundf NEW: ISO C 9x
1987 roundl NEW: ISO C 9x
1989 scalbln NEW: ISO C 9x
1990 scalblnf NEW: ISO C 9x
1991 scalblnl NEW: ISO C 9x
1993 sendfile NEW: kernel
1994 setcontext NEW: Unix98
1995 setrlimit64 NEW: LFS
1996 setutxent NEW: Unix98
1998 sigignore NEW: Unix98
1999 sigqueue NEW: POSIX.1b
2000 sigrelse NEW: Unix98
2001 sigset NEW: POSIX.1b
2002 sigtimedwait NEW: POSIX.1b
2003 sigwaitinfo NEW: POSIX.1b
2004 sincos NEW: GNU ext.
2005 sincosf NEW: GNU ext.
2006 sincosl NEW: GNU ext.
2010 strcasestr NEW: GNU ext.
2011 strtoimax NEW: ISO C 9x
2012 strtoumax NEW: ISO C 9x
2013 strverscmp NEW: GNU ext.
2014 svcauthdes_stats NEW: Secure RPC
2015 svcunix_create NEW: sunrpc etx
2016 svcunixfd_create NEW: sunrpc ext
2017 swapcontext NEW: Unix98
2018 tcgetsid NEW: Unix98 PTY
2019 tdestroy NEW: GNU ext.
2020 tgamma NEW: ISO C 9x
2021 tgammaf NEW: ISO C 9x
2022 tgammal NEW: ISO C 9x
2026 truncf NEW: ISO C 9x
2027 truncl NEW: ISO C 9x
2029 unlockpt NEW: Unix98 PTY
2030 updwtmpx NEW: Unix98
2031 user2netname NEW: Secure RPC
2032 utmpxname NEW: Unix98
2033 versionsort NEW: GNU ext.
2034 versionsort64 NEW: GNU ext.
2036 wcscasecmp NEW: GNU ext.
2037 wcsncasecmp NEW: GNU ext.
2038 wcsnlen NEW: GNU ext.
2039 wcstoimax NEW: ISO C 9x
2040 wcstoll NEW: ISO C 9x
2041 wcstoull NEW: ISO C 9x
2042 wcstoumax NEW: ISO C 9x
2044 wordexp NEW: POSIX.2
2045 wordfree NEW: POSIX.2
2046 write_profiling REMOVED
2047 xdecrypt NEW: Secure RPC
2048 xdr_authdes_cred NEW: Secure RPC
2049 xdr_authdes_verf NEW: Secure RPC
2050 xdr_cryptkeyarg NEW: Secure RPC
2051 xdr_cryptkeyarg2 NEW: Secure RPC
2052 xdr_cryptkeyres NEW: Secure RPC
2053 xdr_getcredres NEW: Secure RPC
2054 xdr_key_netstarg NEW: Secure RPC
2055 xdr_key_netstres NEW: Secure RPC
2056 xdr_keybuf NEW: Secure RPC
2057 xdr_keystatus NEW: Secure RPC
2058 xdr_netnamestr NEW: Secure RPC
2059 xdr_sizeof NEW: Secure RPC
2060 xdr_unixcred NEW: sunrpc ext
2061 xencrypt NEW: Secure RPC
2062 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2073 * inet_ntoa is thread-safe
2075 * updwtmp is moved from libutil to libc
2077 * rewrite of cbrt function
2079 * update of timezone data
2093 * add atoll function
2095 * fix complex problems in Berkeley DB code
2097 * fix math functions
2101 * fixed lots of header problems (especially Linux/GNU specific)
2103 * dynamic loader preserves all registers
2105 * Roland McGrath provided support for handling of auxiliary objects in
2106 the ELF dynamic loader.
2108 * support for parallel builds is improved
2112 * GNU extensions are no longer declared by default. To enable them you
2113 must define the macro `_GNU_SOURCE' in your program or compile with
2116 * The library has changed from using GNU ld symbol aliases to using weak
2117 symbols where available. The ELF object file format supports weak
2118 symbols; GNU ld also supports weak symbols in the a.out format. (There
2119 is also now support for other GNU ld extensions in ELF. Use the
2120 `--with-elf' option to configure to indicate you have ELF, and
2121 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2122 of many files which contained only symbol aliases, reducing the size of
2123 the source and the compiled library; many other files were renamed to
2124 less cryptic names previously occupied by the symbol alias files.
2125 There is a new header file <elf.h> for programs which operate on
2126 files in the ELF format.
2128 * Converted to Autoconf version 2, so `configure' has more options.
2129 Run `configure --help' to see the details.
2131 * The library can now be configured to build profiling, highly-optimized
2132 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2133 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2134 `configure' enable building these extra libraries. The shared library is
2135 built by default when using both ELF and GNU ld. When shared libraries
2136 are enabled, the new library `-ldl' is available for arbitrary run-time
2137 loading of shared objects; its interface is defined in <dlfcn.h>. The
2138 new header file <link.h> gives access to the internals of the run-time
2139 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2140 application of same name on other systems and it provides information
2141 about dynamically linked binaries.
2143 * The C library now provides the run-time support code for profiling
2144 executables compiled with `-pg'. Programs can control the profiling code
2145 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2146 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2147 the support for this file format was contributed by David Mosberger-Tang.
2149 * The math code has been replaced with a math library based on fdlibm from
2150 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2151 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2152 functions. The math functions now reside in a separate library, so
2153 programs using them will need to use `-lm' their linking commands.
2155 * John C. Bowman contributed optimized ix87 assembler inline functions.
2157 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2158 mechanism similar to that found in Solaris 2. This is now used for the
2159 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2160 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2161 file controls what services are used for each individual database. This
2162 works by loading shared libraries with names specified in `nsswitch.conf',
2163 so service modules can be changed or added at any time without even
2164 relinking any program. Currently there are the file, db, and NIS based
2165 NSS services available.
2167 * The new functions `strtoq' and `strtouq' parse integer values from
2168 strings, like `strtol' and `strtoul', but they return `long long int' and
2169 `unsigned long long int' values, respectively (64-bit quantities).
2171 * The new functions `strtof' and `strtold' parse floating-point values from
2172 strings, like `strtod', but they return `float' and `long double' values,
2173 respectively (on some machines `double' and `long double' are the same).
2175 * Ulrich Drepper has contributed new implementations of the floating-point
2176 printing and reading code used in the `printf' family of functions and
2177 `strtod', `strtof', and `strtold'. These new functions are perfectly
2178 accurate, and much faster than the old ones.
2180 * The implementation of the POSIX locale model was completely rewritten by
2181 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2182 to compile the POSIX locale definition.
2184 * The former dummy implementations of the strcoll and strxfrm function are
2185 now replaced by fully functional code contributed by Ulrich Drepper. The
2186 collation information comes from the POSIX locale definitions.
2188 * The new header <langinfo.h> defines an interface for accessing
2189 various locale-dependent data (using the locale chosen with `setlocale').
2191 * Ulrich Drepper has contributed a new suite of functions for operation on
2192 wide-character and multibyte-character strings, in <wchar.h>;
2193 and classification and case conversion of wide characters, in <wctype.h>.
2194 These new functions are conforming to the ISO C, Amendement 1 specification.
2196 * There is now a second implementation of the standard I/O library available.
2197 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2198 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2200 * You can now use positional parameter specifications in format strings
2201 for the `printf' and `scanf' families of functions. For example,
2202 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2203 ``Number 6, Mr Jones''. This is mainly useful when providing different
2204 format strings for different languages, whose grammars may dictate
2205 different orderings of the values being printed. To support this
2206 feature, the interface for `register_printf_handler' has changed; see
2207 the header file <printf.h> for details.
2209 * The `printf' and `scanf' families of functions now understand a new
2210 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2211 to group numbers as indicated by the locale; for `scanf' and friends, this
2212 says to accept as valid only a number with all the proper grouping
2213 separators in the right places. In the default "C" locale, numbers are
2214 not grouped; but locales for specific countries will define the usual
2215 conventions (i.e. separate thousands with `,' in the US locale).
2217 * The pgrp functions have been regularized, slightly incompatibly but much
2218 less confusingly. The core functions are now `getpgid' and `setpgid',
2219 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2220 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2221 provided for compatibility. There is no longer an incompatible `getpgrp'
2222 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2224 * The new header file <fts.h> and suite of functions simplify programs that
2225 operate on directory trees. This code comes from 4.4 BSD.
2227 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2228 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2229 NSS scheme used in glibc.
2231 * There is a new malloc debugging hook `__memalign_hook'.
2233 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2234 `unsigned int' in <sys/types.h>. These are for compatibility only and
2235 their use is discouraged.
2237 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2238 done differently, so that it works even without GNU ld.
2240 * New function `euidaccess' checks allowed access to a file like `access',
2241 but using the effective IDs instead of the real IDs.
2243 * The time zone data files have been updated for the latest and greatest
2244 local time conventions of the countries of the world.
2246 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2249 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2250 for formatting floating-point numbers. They are provided only for
2251 compatibility; new programs should use `sprintf' instead. There are
2252 also equivalent function for the `long double' floating-point type and
2253 all functions also exist in a reentrant form.
2255 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2256 functions for maintaining the login-record files (primarily of use to
2257 system programs such as `login'), and convenient functions for
2258 allocating and initializing a pseudo-terminal (pty) device.
2260 * Ulrich Drepper has contributed new support for System V style
2261 shared memory and IPC on systems that support it.
2263 * Ulrich Drepper has contributed several miscellaneous new functions found
2264 in System V: The `hsearch' family of functions provide an effective
2265 implementation of hash tables; `a64l' and `l64a' provide a very simple
2266 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2269 * Ulrich Drepper has contributed new reentrant counterparts for the
2270 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2272 * Ulrich Drepper has contributed new, highly-optimized versions of several
2273 string functions for the i486/Pentium family of processors.
2275 * Ulrich Drepper has updated the Linux-specific code, based largely
2276 on work done in Hongjiu Lu's version of GNU libc for Linux.
2277 The GNU library now supports Linux versions 2.0.10 and later,
2278 using the ELF object file format (i[3456]86-*-linux).
2280 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2282 * David Mosberger-Tang and Richard Henderson have ported the C library
2283 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2284 dynamic linking support for ELF/Alpha.
2286 * Richard Henderson contributed several Alpha optimized assembler function
2287 for arithmetic and string handling.
2289 * Ulrich Drepper has contributed a new set of message catalog functions to
2290 support multiple languages using the <libintl.h> interface, for use with
2291 his new package GNU gettext. Translation volunteers have contributed
2292 catalogs of the library's messages in Spanish, German, and Korean.
2294 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2295 program and the `catgets' function for reading the catalog files it
2296 creates. (The <libintl.h> interface is preferred; we include the
2297 <nl_types.h> interface using `catgets' only for source compatibility with
2298 programs already written to use it.)
2300 * New header file <values.h> gives SVID-compatible names for <limits.h>
2303 * Various new macros, declarations, and small header files for compatibility
2306 * New function `group_member' is a convenient way to check if a process has
2307 a given effective group ID.
2309 * When using GCC 2.7 and later, the socket functions are now declared in a
2310 special way so that passing an argument of type `struct sockaddr_in *',
2311 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2312 `struct sockaddr *' type, does not generate a type-clash warning.
2314 * New function `error' declared in header file <error.h> is a convenient
2315 function for printing error messages and optionally exiting; this is the
2316 canonical function used in GNU programs. The new functions `err', `warn',
2317 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2318 doing the same thing.
2320 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2321 POSIX.2 `glob' function to do ~ and {...} expansion.
2323 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2324 `clearenv' which is used in POSIX.9 is also available.
2326 * New function `getsid' returns session ID number on systems that support it.
2328 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2329 files <db.h> and <mpool.h> provide a rich set of functions for several
2330 types of simple databases stored in memory and in files, and <ndbm.h> is
2331 an old `ndbm'-compatible interface using the `db' functions. Link with
2332 `-ldb' to get these functions.
2334 * New macro `strdupa' copies a string like `strdup', but uses local stack
2335 space from `alloca' instead of dynamic heap space from `malloc'.
2337 * New function `strnlen' is like `strlen' but searches only a given maximum
2338 number of characters for the null terminator. `stpncpy', `strndup' and
2339 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2342 * New function `statfs' in header <sys/statfs.h>.
2344 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2345 provide convenient functions for operating on blocks of null-terminated
2348 * A new suite of functions in <utmp.h> handle all the details of reading
2349 and writing the utmp file.
2351 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2354 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2355 completely POSIX compliant and also implemented the extended functionality
2356 to handle alternate digit representation and alternate era date formats.
2358 * Ulrich Drepper provided an implementation of the `strptime' function
2359 defined in XPG4.2 which transforms a string into a `struct tm' value.
2361 * Paul Eggert provided the tzselect shell script as part of the timezone
2362 code. The shell script makes it easy to select the correct timezone
2365 * The implementation of the malloc family of functions is completely replaced
2366 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2367 The implementation uses the mmap function (if available) and it is
2368 optimized for the use in multi threaded programs.
2370 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2371 functions. This new functionality is usable by specifying a special
2372 salt string and it is compatible with implementation on *BSD systems.
2374 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2375 `getsubopt' to handle second level command line options, `bsd_signal'
2376 to access BSD style `signal' functionality, the obsolete `regexp' style
2379 * the `lchown' function is available on system which support this
2382 * The implementation of the shadow password handling function was contributed
2385 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2387 * POSIX.1g support was added. The <sys/select.h> header is available,
2388 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2389 implementation of `getaddrinfo'.
2393 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2395 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2396 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2398 * The new function `daemon' from 4.4 BSD is useful for server programs that
2399 want to put themselves in the background.
2401 * Joel Sherrill has contributed support for several standalone boards that
2402 run without an operating system.
2404 * `printf', `scanf' and friends now accept a `q' type modifier for long
2405 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2407 * All of the code taken from BSD (notably most of the math and networking
2408 routines) has been updated from the BSD 4.4-Lite release.
2410 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2412 * The new functions `getdomainname' and `setdomainname' fetch or change the
2413 YP/NIS domain name. These are system calls which exist on systems which
2416 * The time zone data files have been updated for the latest international
2419 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2420 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2424 * The C library now includes support for Sun RPC, from Sun's free
2425 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2426 are included. (There is still no support for YP.)
2428 * Tom Quinn has contributed a port of the C library to SGI machines running
2429 Irix 4 (mips-sgi-irix4).
2431 * The new `lockf' function is a simplified interface to the locking
2432 facilities of `fcntl', included for compatibility.
2434 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2436 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2438 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2441 * The error message printed by `assert' for a failed assertion now includes
2442 the name of the program (if using GNU ld) and the name of the calling
2443 function (with versions of GCC that support this).
2445 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2447 * The library now includes the <sys/mman.h> header file and memory
2448 management functions `mmap', `munmap', `mprotect', `msync', and
2449 `madvise', on systems that support those facilities.
2451 * The interface for `mcheck' has changed slightly: the function called to
2452 abort the program when an allocation inconsistency is detected now takes
2453 an argument that indicates the type of failure. The new function
2454 `mprobe' lets you request a consistency check for a particular block at
2455 any time (checks are normally done only when you call `free' or `realloc'
2458 * It is now possible to easily cross-compile the C library, building on one
2459 system a library to run on another machine and/or operating system. All
2460 you need to do is set the variable `HOST_CC' in `configparms' to the
2461 native compiler for programs to run on the machine you are building on (a
2462 few generator programs are used on Unix systems); set `CC' to the
2465 * The new function `fexecve' (only implemented on the GNU system) executes
2466 a program file given a file descriptor already open on the file.
2470 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2471 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2473 * You can set the variable `libprefix' in `configparms' to specify a prefix
2474 to be prepended to installed library files; this makes it easy to install
2475 the GNU C library to be linked as `-lgnuc' or whatever.
2477 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2478 copies a limited number of characters from a string, and returns the
2479 address of the last character written.
2481 * You no longer need to check for whether the installed `stddef.h' is
2482 compatible with the GNU C library. configure now checks for you.
2484 * You can now define a per-stream `fileno' function to convert the
2485 stream's cookie into an integral file descriptor.
2487 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2488 allocates zero bytes of storage, and returns a unique pointer which
2489 you can pass to `realloc' or `free'. The behavior is undefined if
2490 you dereference this pointer.
2492 * The C library now runs on Sony NEWS m68k machines running either
2493 NewsOS 3 or NewsOS 4.
2495 * The new `syscall' function is a system-dependent primitive function
2496 for invoking system calls. It has the canonical behavior on Unix
2497 systems, including unreliable return values for some calls (such as
2498 `pipe', `fork' and `getppid').
2500 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2501 to `EAGAIN', which is the preferred name. On systems whose kernels
2502 use two distinct codes, the C library now translates EWOULDBLOCK to
2503 EAGAIN in every system call function.
2507 * The GNU C Library Reference Manual is now distributed with the library.
2508 `make dvi' will produce a DVI file of the printed manual.
2509 `make info' will produce Info files that you can read on line using C-h i
2510 in Emacs or the `info' program.
2511 Please send comments on the manual to bug-glibc-manual@gnu.org.
2513 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2515 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2517 * Jason Merrill has contributed a port to the Sequent Symmetry running
2518 Dynix version 3 (i386-sequent-dynix).
2520 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2521 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2523 * New function `memory_warnings' lets you arrange to get warnings when
2524 malloc is running out of memory to allocate, like Emacs gives you.
2526 * The C library now contains the relocating allocator used in Emacs 19 for
2527 its editing buffers. This allocator (ralloc) minimizes allocation
2528 overhead and fragmentation by moving allocated regions around whenever it
2529 needs to. You always refer to a ralloc'd region with a "handle" (a
2530 pointer to a pointer--an object of type `void **').
2532 * There is a new `printf' format: `%m' gives you the string corresponding
2533 to the error code in `errno'.
2535 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2536 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2537 pass, the `a' modifier says to fill in a `char **' you pass with a
2540 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2541 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2542 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2544 * `mkstemp' is a traditional Unix function to atomically create and open a
2545 uniquely-named temporary file.
2549 * The standard location for the file that says what the local timezone is
2550 has changed again. It is now `/usr/local/etc/localtime' (or more
2551 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2553 * The distribution no longer contains any files with names longer than 14
2556 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2557 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2559 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2563 * The configuration process has changed quite a bit. The `configure'
2564 script is now used just like the configuration scripts for other GNU
2565 packages. The `sysdeps' directory hierarchy is much rearranged.
2566 The file `INSTALL' explains the new scheme in detail.
2568 * The header files no longer need to be processed into ANSI C and
2569 traditional C versions. There is just one set of files to install, and
2570 it will work with ANSI or old C compilers (including `gcc -traditional').
2572 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2573 MIPS DECStation running Ultrix 4.
2575 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2576 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2577 made itself into a shared library.
2579 * Yet further improved support for the i386, running 4.3 BSD-like systems
2580 (such as Mach 3 with the Unix single-server), or System V.
2582 * New function `strncasecmp' to do case-insensitive string comparison
2583 with limited length.
2585 * New function `strsep' is a reentrant alternative to `strtok'.
2587 * New functions `scandir' and `alphasort' for searching directories.
2589 * New function `setenv' is a better interface to `putenv'.
2591 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2592 function for traversing a directory tree.
2594 * The GNU obstack package is now also part of the C library.
2595 The new function `open_obstack_stream' creates a stdio stream that
2596 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2597 formatted output directly to an obstack.
2599 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2600 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2602 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2604 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2605 things to your strings.
2607 * There are some new test programs: test-fseek, testmb, and testrand.
2609 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2610 These ports are not finished, but are a good starting place for really
2611 supporting those systems.
2613 * `/etc/localtime' is now the standard location for the file that says what
2614 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2615 This follows the general principle that `/etc' is the place for all local
2616 configuration files.
2618 * The C library header files now use `extern "C"' when used by the C++
2619 compiler, so the C library should now work with C++ code.
2621 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2622 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2625 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2626 function which uses the `merge sort' algorithm, and is said to be
2627 significantly faster than the old GNU `qsort' function. Merge sort is
2628 now the standard `qsort' function. The new algorithm can require a lot
2629 of temporary storage; so, the old sorting function is called when the
2630 required storage is not available.
2632 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2633 provides the Unix `crypt' function, plus some other entry points.
2635 * The code and header files taken from 4.4 BSD have been updated with the
2636 latest files released from Berkeley.
2638 ----------------------------------------------------------------------
2639 Copyright information:
2641 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2643 Permission is granted to anyone to make or distribute verbatim copies
2644 of this document as received, in any medium, provided that the
2645 copyright notice and this permission notice are preserved,
2646 thus giving the recipient permission to redistribute in turn.
2648 Permission is granted to distribute modified versions
2649 of this document, or of portions of it,
2650 under the above conditions, provided also that they
2651 carry prominent notices stating who last changed them.
2654 version-control: never