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.
20 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
21 for LD and GD on x86 and x86-64, has been implemented. You will need
22 binutils-2.24 or later to enable this optimization.
24 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
25 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
26 Hat). These updates cause user visible changes, such as the fix for bug
32 * The following bugs are resolved with this release:
34 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
35 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
36 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
37 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
38 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
39 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
40 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
41 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
42 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
43 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
46 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
47 too little memory for the to-be-scanned arguments and overflow the
48 allocated buffer. The implementation now correctly computes the required
49 buffer size when using malloc, and switches to malloc from alloca as
52 * A new semaphore algorithm has been implemented in generic C code for all
53 machines. Previous custom assembly implementations of semaphore were
54 difficult to reason about or ensure that they were safe. The new version
55 of semaphore supports machines with 64-bit or 32-bit atomic operations.
56 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
57 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
59 * Port to Altera Nios II has been contributed by Mentor Graphics.
61 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
62 implementations for powerpc64/powerpc64le.
63 Implemented by Adhemerval Zanella (IBM).
65 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
66 and powerpc64le. This may improve lock scaling of existing programs on
67 HTM capable systems. The lock elision code is only enabled with
68 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
69 powerpc will issue a transaction abort on every syscall to avoid side
70 effects being visible outside transactions.
72 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
73 AArch64. Contributed by ARM Ltd.
75 * i386 memcpy functions optimized with SSE2 unaligned load/store.
77 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
78 under certain input conditions resulting in the execution of a shell for
79 command substitution when the application did not request it. The
80 implementation now checks WRDE_NOCMD immediately before executing the
81 shell and returns the error WRDE_CMDSUB as expected.
83 * CVE-2012-3406 printf-style functions could run into a stack overflow when
84 processing format strings with a large number of format specifiers.
86 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
87 infinite loop if the DNS response contained a PTR record of an unexpected
90 * The minimum GCC version that can be used to build this version of the GNU
91 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
92 still be used to compile programs using the GNU C Library.
94 * The GNU C Library is now built with -Werror by default. This can be
95 disabled by configuring with --disable-werror.
97 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
99 * The obsolete sigvec function has been removed. This was the original
100 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
101 programs have been using instead for about 25 years. Of course, ABI
102 compatibility for old binaries using sigvec remains intact.
104 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
105 with newer versions of bison.
107 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
108 The original MIPS o32 hard-float ABI requires an FPU where double-precision
109 registers overlay two consecutive single-precision registers. MIPS32R2
110 introduced a new FPU mode (FR=1) where double-precision registers extend the
111 corresponding single-precision registers which is incompatible with the
112 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
113 require the use of FR=1 making a transition necessary. New o32 ABI
114 extensions enable users to migrate over time from the original o32 ABI
115 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
116 tracks the ABI of any loaded object and verifies that new objects are
117 compatible. Mode transitions will also be requested as required and
118 unsupportable objects will be rejected. The ABI checks include both soft and
119 hard float ABIs for o32, n32 and n64.
121 GCC 5 with GNU binutils 2.25 onwards:
122 It is strongly recommended that all o32 system libraries are built using the
123 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
124 with the original and all new o32 ABI extensions. Configure a MIPS GCC
125 compiler using --with-fp-32=xx to set this by default.
129 * The following bugs are resolved with this release:
131 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
132 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
133 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
134 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
135 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
136 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
137 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
138 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
139 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
140 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
141 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
142 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
143 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
144 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
145 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
147 * Reverted change of ABI data structures for s390 and s390x:
148 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
149 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
150 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
151 are preserved pointing straight to the same implementation as the old ones.
152 Given that, new callers will simply provide a too-big buffer to these
153 functions. Any applications/libraries out there that embed jmp_buf or
154 ucontext_t in an ABI-relevant data structure that have already been rebuilt
155 against 2.19 headers will have to rebuilt again. This is necessary in any
156 case to revert the breakage in their ABI caused by the glibc change.
158 * Support for file description locks is added to systems running the
159 Linux kernel. The standard file locking interfaces are extended to
160 operate on file descriptions, not file descriptors, via the use of
161 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
162 are associated with an open file instead of a process.
164 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
166 * The minimum Linux kernel version that this version of the GNU C Library
167 can be used with is 2.6.32.
169 * Running the testsuite no longer terminates as soon as a test fails.
170 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
171 with PASS or FAIL lines for individual tests. A summary of the results is
172 printed, including a list of failing lists, and "make check" exits with
173 error status if there were any unexpected failures. "make check
174 stop-on-test-failure=y" may be used to keep the old behavior.
176 * The am33 port, which had not worked for several years, has been removed
179 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
180 supported; they now act the same as _DEFAULT_SOURCE (but generate a
181 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
182 conflicted with POSIX (support for which was removed in 2.19), the
183 interfaces those macros enabled remain available when compiling with
184 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
187 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
189 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
190 This may improve lock scaling of existing programs on TX capable systems.
191 The lock elision code is only built with --enable-lock-elision=yes and
192 then requires a GCC version supporting the TX builtins. With lock elision
193 default mutexes are elided via __builtin_tbegin, if the cpu supports
194 transactions. By default lock elision is not enabled and the elision code
197 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
198 copy the path argument. This allowed programs to cause posix_spawn to
199 deference a dangling pointer, or use an unexpected pathname argument if
200 the string was modified after the posix_spawn_file_actions_addopen
203 * All supported architectures now use the main glibc sysdeps directory
204 instead of some being in a separate "ports" directory (which was
205 distributed separately before glibc 2.17).
207 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
208 On configurations that support it (all Linux configurations), it's now
209 used regardless of the --enable-add-ons switch to configure. It is no
210 longer possible to build such configurations without pthreads support.
212 * Locale names, including those obtained from environment variables (LANG
213 and the LC_* variables), are more tightly checked for proper syntax.
214 setlocale will now fail (with EINVAL) for locale names that are overly
215 long, contain slashes without starting with a slash, or contain ".." path
216 components. (CVE-2014-0475) Previously, some valid locale names were
217 silently replaced with the "C" locale when running in AT_SECURE mode
218 (e.g., in a SUID program). This is no longer necessary because of the
221 * On x86-64, the dynamic linker's lazy-binding support is now compatible
222 with application code using Intel MPX instructions. (With all previous
223 versions, the MPX register state could be clobbered when making calls
224 into or out of a shared library.) Note that while the new dynamic
225 linker is compatible with all known x86 hardware whether or not it
226 supports Intel MPX, some x86 instruction-set emulators might fail to
227 handle the new instruction encodings. This is known to affect Valgrind
228 versions up through 3.9 (but will be fixed in the forthcoming 3.10
229 release), and might affect other tools that do instruction emulation.
231 * Support for loadable gconv transliteration modules has been removed.
232 The support for transliteration modules has been non-functional for
233 over a decade, and the removal is prompted by security defects. The
234 normal gconv conversion modules are still supported. Transliteration
235 with //TRANSLIT is still possible, and the //IGNORE specifier
236 continues to be supported. (CVE-2014-5119)
238 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
239 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
240 resulting a denial-of-service security vulnerability in applications which
241 use functions related to iconv. (CVE-2014-6040)
245 * The following bugs are resolved with this release:
247 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
248 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
249 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
250 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
251 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
252 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
253 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
254 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
255 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
256 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
257 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
258 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
259 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
260 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
261 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
262 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
263 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
264 16431, 16453, 16474, 16506, 16510, 16529
266 * Slovenian translations for glibc messages have been contributed by the
267 Translation Project's Slovenian team of translators.
269 * The public headers no longer use __unused nor __block. This change is to
270 support compiling programs that are derived from BSD sources and use
271 __unused internally, and to support compiling with Clang's -fblock
272 extension which uses __block.
274 * CVE-2012-4412 The strcoll implementation caches indices and rules for
275 large collation sequences to optimize multiple passes. This cache
276 computation may overflow for large collation sequences and may cause a
277 stack or buffer overflow. This is now fixed to use a slower algorithm
278 which does not use a cache if there is an integer overflow.
280 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
281 rules for large collation sequences to optimize multiple passes and falls
282 back to alloca if malloc fails, resulting in a possible stack overflow.
283 The implementation now falls back to an uncached collation sequence lookup
286 * CVE-2013-4788 The pointer guard used for pointer mangling was not
287 initialized for static applications resulting in the security feature
288 being disabled. The pointer guard is now correctly initialized to a
289 random value for static applications. Existing static applications need
290 to be recompiled to take advantage of the fix (bug 15754).
292 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
293 to the d_name member of struct dirent, or omit the terminating NUL
294 character. (Bugzilla #14699).
296 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
297 aligned_alloc functions could allocate too few bytes or corrupt the
298 heap when passed very large allocation size values (Bugzilla #15855,
301 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
302 for AF_INET6 has been fixed (Bugzilla #16072).
304 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
305 pap_CW, quz_PE, the_NP.
307 * Substantially revised locales: gd_GB, ht_HT
309 * The LC_ADDRESS field was updated to support country_car for almost all
312 * ISO 1427 definitions were updated.
314 * ISO 3166 definitions were updated.
316 * The localedef utility now supports --big-endian and --little-endian
317 command-line options to generate locales for a different system from that
318 for which the C library was built.
320 * Binary locale files now only depend on the endianness of the system for
321 which they are generated and not on other properties of that system. As a
322 consequence, binary files generated with new localedef may be incompatible
323 with old versions of the GNU C Library, and binary files generated with
324 old localedef may be incompatible with this version of the GNU C Library,
325 in the following circumstances:
327 + Locale files may be incompatible on m68k systems.
329 + Locale archive files (but not separate files for individual locales) may
330 be incompatible on systems where plain "char" is signed.
332 * The configure option --disable-versioning has been removed. Builds with
333 --disable-versioning had not worked for several years.
335 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
336 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
338 * SystemTap probes for malloc have been introduced.
340 * SystemTap probes for slow multiple precision fallback paths of
341 transcendental functions have been introduced.
343 * Support for powerpc64le has been added.
345 * The soft-float powerpc port now supports e500 processors.
347 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
349 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
350 set of header declarations that are enabled by default, even when other
351 feature test macros or compiler options such as -std=c99 would otherwise
352 disable some of those declarations.
354 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
355 conflict with POSIX. The libbsd-compat library (which was a dummy library
356 that did nothing) has also been removed.
358 * Preliminary documentation about Multi-Thread, Async-Signal and
359 Async-Cancel Safety has been added.
361 * Change of ABI data structures for s390 and s390x:
362 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
363 allow for future hardware extensions. All library functions that accept or
364 return these structures were versioned in order to provide backwards
365 compatibility with existing code. However, not all cases can be handled
366 with interface versioning. If an application embeds either structure into
367 another structure and that structure is passed to another compilation unit
368 which expects the newer larger-sized object then any access to the new
369 fields will result in undefined behaviour. Similarly any access to fields
370 that were moved by the enlarging of the structures will cause undefined
371 behaviour. To fix the undefined behaviour all objects that are part of the
372 final in-memory image must agree on the size of structures, and this may
373 require recompilation.
377 * The following bugs are resolved with this release:
379 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
380 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
381 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
382 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
383 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
384 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
385 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
386 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
387 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
388 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
389 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
390 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
391 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
394 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
395 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
396 Distributions can re-enable building and using pt_chown via the new configure
397 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
398 considerable security risks and should only be used if the distribution
399 understands and accepts the risks.
401 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
404 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
405 fixed (Bugzilla #15330).
407 * Add support for calling C++11 thread_local object destructors on thread
408 and program exit. This needs compiler support for offloading C++11
409 destructor calls to glibc.
411 * Improved worst case performance of libm functions with double inputs and
414 * Support for priority inherited mutexes in pthread condition variables on
415 non-x86 architectures.
417 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
419 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
421 * Optimized string functions for ARM. Implemented by Will Newton and
424 * Optimized libm functions for SPARC. Implemented by David S. Miller.
426 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
429 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
430 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
432 * Added a benchmark framework to track performance of functions in glibc.
434 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
435 It is based on draft TS 18661 and currently enabled as a GNU extension.
437 * On Linux, the clock function now uses the clock_gettime system call
438 for improved precision, rather than old times system call.
440 * Added support for version-3 tz format files. This is needed when using
441 the tz database release 2013e or later, and affects a few unusual cases --
442 currently only TZ='America/Godthab' for time stamps after 2037.
444 * Added new API functions pthread_getattr_default_np and
445 pthread_setattr_default_np to get and set the default pthread
446 attributes of a process.
448 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
449 This may improve lock scaling of existing programs on TSX capable systems.
450 When the --enable-lock-elision=yes parameter is specified at configure
451 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
454 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
455 availability). Implemented by Ryan S. Arnold.
457 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
461 * The following bugs are resolved with this release:
463 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
464 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
465 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
466 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
467 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
468 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
469 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
470 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
471 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
472 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
473 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
474 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
475 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
476 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
477 14879, 14889, 14893, 14898, 14914.
479 * Optimization of memcpy for MIPS.
481 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
482 EMFILE has been fixed (Bugzilla #14889).
484 * The add-on ports collection is now distributed in the "ports" subdirectory
485 of the main GNU C Library distribution, rather than separately.
487 * Port to ARM AArch64 contributed by Linaro.
489 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
490 Optimized versions of memcpy, memset, and memcmp added for System z10 and
492 Implemented by Andreas Krebbel.
494 * The new function secure_getenv allows secure access to the environment,
495 returning NULL if running in a SUID/SGID process. This function replaces
496 the internal function __secure_getenv.
498 * SystemTap static probes have been added into the dynamic linker.
499 Implemented by Gary Benson.
501 * Optimizations of string functions strstr, strcasestr and memmem.
502 Implemented by Maxim Kuvyrkov.
504 * The minimum Linux kernel version that this version of the GNU C Library
505 can be used with is 2.6.16.
507 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
508 powerpc POWER7. Implemented by Will Schmidt.
510 * New configure option --disable-nscd builds the C library such that it
511 never attempts to contact the Name Service Caching Daemon (nscd).
512 New configure option --disable-build-nscd avoids building nscd itself;
513 this is the default if --disable-nscd is used.
515 * Improved support for cross-compilation, including cross-testing and
516 bootstrap builds without a previously built glibc.
518 * Several testsuite tests are now able to test multiple IFUNC variants of an
519 interface, rather than just testing the one that would be chooen by
522 * New configure options --with-bugurl and --with-pkgversion, for
523 distributors to use to embed their bug-reporting and package version
524 information in --help and --version output.
526 * The ttyname and ttyname_r functions on Linux now fall back to searching for
527 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
528 allows creation of chroots without the procfs mounted on /proc.
530 * The `crypt' function now fails if passed salt bytes that violate the
531 specification for those values. On Linux, the `crypt' function will
532 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
533 enabled, and fail on encrypted strings using the MD5 or DES algorithm
534 when the mode is enabled.
536 * The `clock_*' suite of functions (declared in <time.h>) is now available
537 directly in the main C library. Previously it was necessary to link with
538 -lrt to use these functions. This change has the effect that a
539 single-threaded program that uses a function such as `clock_gettime' (and
540 is not linked with -lrt) will no longer implicitly load the pthreads
541 library at runtime and so will not suffer the overheads associated with
542 multi-thread support in other code such as the C++ runtime library.
544 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
549 * The following bugs are resolved with this release:
551 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
552 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
553 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
554 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
555 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
556 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
557 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
558 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
559 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
560 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
561 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
562 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
563 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
564 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
565 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
566 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
567 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
568 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
569 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
570 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
571 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
572 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
575 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
576 configuring glibc with:
577 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
578 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
579 Implemented by H.J. Lu.
583 + define static_assert
585 + do not declare gets
587 + declare at_quick_exit and quick_exit also for ISO C11
589 + aligned_alloc. NB: The code is deliberately allows the size parameter
590 to not be a multiple of the alignment. This is a moronic requirement
591 in the standard but it is only a requirement on the caller, not the
596 + uchar.h support added
598 + CMPLX, CMPLXF, CMPLXL added
600 Implemented by Ulrich Drepper.
602 * Support for the IA-64 has been moved to ports.
604 * Remove support for anything but ELF binary format
606 * Checking versions of poll, ppoll added.
607 Implemented by Ulrich Drepper.
609 * More generic and 64-bit performance optimizations to math functions.
610 Implemented by Ulrich Drepper.
612 * New configure option --enable-obsolete-rpc makes the deprecated RPC
613 headers and functions available at compile time as they were before
614 version 2.14. This option will be removed at some time in the future
615 after the TI-RPC library becomes fully sufficient for the needs of
616 existing applications.
618 * Compatibility code for Linux kernel versions before 2.4 has been removed.
619 Note that glibc is not expected to work with any Linux kernel version
622 * New header <sys/auxv.h> and function getauxval allowing easy access to
623 the AT_* key-value pairs passed from the Linux kernel. The header also
624 defines the HWCAP_* bits associated with the AT_HWCAP key.
626 * New locales: mag_IN
628 * New configure option --enable-systemtap builds SystemTap static probes
629 into libc for setjmp and longjmp and into libpthread for various operations.
630 So far the setjmp/longjmp probes and some of the libpthread probes are
631 provided only for i*86 and x86_64.
632 Implemented by Roland McGrath and Rayson Ho.
634 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
636 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
639 * More optimized functions for SPARC. Implemented by David S. Miller.
641 * Improved support for cross-compilation, especially bootstrap builds
642 without a previously built glibc.
644 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
645 Chris Metcalf from Tilera.
647 * Support for the old ARM ABI has been removed from ports. Only the EABI is
648 now supported for ARM processors.
650 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
651 as the name of the dynamic linker, to distinguish it from the
652 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
654 * Support for CRIS has been removed from ports.
656 * A new class of installed header has been documented for low-level
657 platform-specific functionality. PowerPC added the first instance with a
658 function to provide time base register access. Contributed by Tulio
659 Magno Quites Machado Filho.
661 * ix86 configurations now install header files that are consistent with
662 what x86-64 configurations install. These same header files can be used
663 for -m32, -m64, or -mx32 builds.
664 Contributed by H.J. Lu.
666 * Math library bug fixes. A thorough audit of all open math library bugs was
667 conducted by Joseph Myers. Significant progress was made on many math
668 library bugs resulting in more accurate exceptions and function results.
669 Many thanks to all those that contributed including Andreas Jaeger for his
670 patch review and work on the x87 trigonometric instruction issues.
672 * Timezone data is no longer installed. Timezone-related binaries and scripts
673 will continue to be installed. Users should obtain their timezone data from
674 their distribution provider or from the tzdata package at
675 <ftp://munnari.oz.au/pub/>.
679 * The following bugs are resolved with this release:
681 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
682 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
683 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
684 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
685 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
686 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
687 13484, 13506, 13515, 13523, 13524, 13538, 13540
689 * New program pldd to list loaded object of a process
690 Implemented by Ulrich Drepper.
692 * Add nss_db support back to glibc. No more dependency on Berkeley db
693 and support for initgroups lookups.
694 Implemented by Ulrich Drepper.
696 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
697 Contributed by HJ Lu.
699 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
700 Contributed by HJ Lu.
702 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
703 on x86-32 and x86-64.
704 Contributed by Liubov Dmitrieva.
706 * Optimized strchr and strrchr for SSE on x86-32.
707 Contributed by Liubov Dmitrieva.
709 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
710 for x86-64 and x86-32.
711 Contributed by Liubov Dmitrieva.
713 * New interfaces: scandirat, scandirat64
714 Implemented by Ulrich Drepper.
716 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
717 Implemented by Ulrich Drepper.
719 * nscd now also caches the netgroup database.
720 Implemented by Ulrich Drepper.
722 * Integrate libm with gcc's -ffinite-math-only option.
723 Implemented by Ulrich Drepper.
725 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
726 to math functions. Implemented by Ulrich Drepper.
728 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
729 Implemented by Ulrich Drepper.
731 * New Linux interfaces: process_vm_readv, process_vm_writev
733 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
734 Implemented by Ulrich Drepper.
736 * Optimized nearbyint and strcasecmp for PPC.
737 Implemented by Adhemerval Zanella.
739 * New locales: bho_IN, unm_US, es_CU, ta_LK
743 * The following bugs are resolved with this release:
745 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
746 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
747 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
748 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
749 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
750 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
751 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
752 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
753 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
754 12795, 12811, 12813, 12814, 12841
756 * The RPC implementation in libc is obsoleted. Old programs keep working
757 but new programs cannot be linked with the routines in libc anymore.
758 Programs in need of RPC functionality must be linked against TI-RPC.
759 The TI-RPC implementation is IPv6 enabled and there are other benefits.
761 Visible changes of this change include (obviously) the inability to link
762 programs using RPC functions without referencing the TI-RPC library and the
763 removal of the RPC headers from the glibc headers.
764 Implemented by Ulrich Drepper.
766 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
767 syncfs, setns, sendmmsg
769 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
770 yue_HK, lij_IT, mhr_RU
772 * New encodings: CP770, CP771, CP772, CP773, CP774
774 * New program sotruss to trace calls through PLTs
775 Implemented by Ulrich Drepper.
777 * The malloc hook implementation is marked deprecated and will be removed
778 from the default implementation in the next version. The design never
779 worked ever since the introduction of threads. Even programs which do
780 not create threads themselves can use multiple threads created internally.
784 * The following bugs are resolved with this release:
786 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
787 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
788 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
789 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
792 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
794 * POWER7 optimizations: memset, memcmp, strncmp
796 * New optimized string functions for x86-64: strnlen (SSE2),
797 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
798 Implemented by Ulrich Drepper.
802 * The following bugs are resolved with this release:
804 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
805 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
806 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
807 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
808 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
809 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
810 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
811 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
813 * New interfaces: pthread_getname_np, pthread_setname_np
815 * New Linux interface: recvmmsg
817 * STT_GNU_IFUNC implemented for Sparc by David Miller.
819 * The dynamic linker now recognizes supported ABI versions from the
820 EI_ABIVERSION field in the ELF header.
821 Implemented by Ulrich Drepper.
823 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
824 will not be used to fill in password fields in the passwd.byname replies.
825 Instead it is used to synthesize the shadow.byname table, should it be
826 missing. This is a useful mode in some installations involving Solaris.
827 Implemented by Ulrich Drepper.
829 * New locales: kok_IN, sq_MK, cv_RU
833 * The following bugs are resolved with this release:
835 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
836 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
837 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
838 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
839 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
840 10789, 10817, 10823, 10840, 10847
842 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
844 Implemented by Ulrich Drepper.
846 * Checking version of longjmp added that fails if an uninitialized stack
847 frame would be created. Implemented by Ulrich Drepper.
849 * STT_GNU_IFUNC is now supported in static executables.
850 Implemented by H.J. Lu.
852 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
854 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
855 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
856 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
857 Contributed by H.J. Lu.
859 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
860 Implemented by Ulrich Drepper.
862 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
864 Contributed by H.J. Lu.
866 * Support for fma instruction in AVX on x86-64.
867 Implemented by H.J. Lu and Ulrich Drepper.
869 * AVX support in x86-64 auditing support in ld.so.
870 Implemented by H.J. Lu.
872 * STB_GNU_UNIQUE support added.
873 Implemented by Ulrich Drepper.
875 * Implement second fallback mode for optimized DNS lookup for even more
876 broken environments. If two requests from the same port are not
877 handled correctly close the socket and open a new one before sending
878 the second request. The 'single-request-reopen' option in /etc/resolv.conf
879 can be used to select this mode right away, instead of rediscovering the
880 necessity is every process again.
881 Implemented by Ulrich Drepper.
883 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
884 Implemented by Adam Tkac.
886 * Optimized iconv conversions for S390x.
887 Implemented by Andreas Krebbel.
889 * Using condvars with PI mutexes is now more efficient due to kernel
890 support for requeueing to PI futexes. NPTL support added for x86-64.
891 Implemented by Ulrich Drepper.
893 * New locales: ps_AF, my_MM
897 * The following bugs are resolved with this release:
899 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
900 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
901 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
902 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
903 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
905 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
906 Implemented by Ulrich Drepper.
908 * New Linux interfaces: accept4, fallocate, fallocate64.
909 Implemented by Ulrich Drepper.
911 * Correct declarations of string function when used in C++ code. This
912 could lead to compile errors for invalid C++ code.
914 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
917 * New POSIX 2008 interface: psiginfo
918 Implemented by Ulrich Drepper.
920 * New ISO C++1x interfaces: quick_exit, at_quick_exit
921 Implemented by Ulrich Drepper.
923 * Support for selecting between multiple function definitions at runtime
924 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
926 * The libcrypt library can now use the hash function implementations in
927 NSS. Implemented by Ulrich Drepper.
929 * The malloc implementation can be compiled to be less memory efficient
930 but higher performing in multi-threaded programs.
931 Implemented by Ulrich Drepper.
933 * New locales: nan_TW@latin, ks_IN
935 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
936 Implemented by Ulrich Drepper.
938 * Extended printf hook support. It is possible to use user-defined types
939 and extend existing format specifiers.
940 Implemented by Ulrich Drepper.
942 * Handling for group shadow files has been added.
943 Implemented by Ulrich Drepper.
945 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
946 servers (the case, e.g., for some people using the built-in DNS
947 server in ADSL modems/routers). There is a once-per-process timeout
948 in case of a broken server. To avoid it, users can run nscd or put
949 'options single-request' in /etc/resolv.conf.
950 Implemented by Ulrich Drepper.
954 * The following bugs are resolved with this release:
956 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
957 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
958 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
959 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
960 6968, 6974, 6980, 6995, 7008, 7009, 7029
962 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
963 up at the same time. Implemented by Ulrich Drepper.
965 * TLS descriptors for LD and GD on x86 and x86-64.
966 Implemented by Alexandre Oliva.
968 * getaddrinfo now handles DCCP and UDPlite.
969 Implemented by Ulrich Drepper.
971 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
972 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
973 Implemented by Ulrich Drepper.
975 * New implementation of memmem, strstr, and strcasestr which is O(n).
976 Implemented by Eric Blake.
978 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
980 * Implement "e" option for popen to open file descriptor with the
981 close-on-exec flag set. Implemented by Ulrich Drepper.
983 * Implement "b" mode for fmemopen. In this mode writes writes don't
984 implicitly add a NUL byte and seeks from the end of the buffer really
985 use the buffer end, not the string length as the basis.
986 Implemented by Ulrich Drepper.
988 * Many functions, exported and internal, now atomically set the close-on-exec
989 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
991 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
993 Implemented by Pravin Satpute.
995 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
999 * The following bugs are resolved with this release:
1001 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1002 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1003 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1004 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1005 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1006 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1007 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1009 * New locales: bo_CN, bo_IN, shs_CA.
1011 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1013 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1014 Implemented by Pravin Satpute.
1016 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1018 * nscd caches now all timeouts for DNS entries
1019 Implemented by Ulrich Drepper.
1021 * nscd is more efficient and wakes up less often.
1022 Implemented by Ulrich Drepper.
1024 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1025 vdprintf, and obstack_vprintf.
1026 Implemented by Jakub Jelinek.
1028 * Faster memset for x86-64.
1029 Implemented by Harsha Jagasia and H.J. Lu.
1031 * Faster memcpy on x86.
1032 Implemented by Ulrich Drepper.
1034 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1035 Implemented by Ulrich Drepper.
1037 * Faster sqrt and sqrtf implemention for some PPC variants.
1038 Implemented by Steven Munroe.
1042 * The following bugs are resolved with this release:
1044 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1045 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1046 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1047 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1048 5071, 5103, 5104, 5112, 5113, 5184, 5186
1050 * More checking functions: fread, fread_unlocked, open*, mq_open.
1051 Implemented by Jakub Jelinek and Ulrich Drepper.
1053 * Extend fortification to C++. Implemented by Jakub Jelinek.
1055 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1056 by not recognizing 'a' as a modifier when those specs are requested.
1057 Implemented by Jakub Jelinek.
1059 * PPC optimizations to math and string functions.
1060 Implemented by Steven Munroe.
1062 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1063 options to be passed. Implemented by Ulrich Drepper.
1065 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1067 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1068 Implemented by Ulrich Drepper.
1070 * Handle private futexes in the NPTL implementation.
1071 Implemented by Jakub Jelinek and Ulrich Drepper.
1073 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1074 Implemented by Roland McGrath and Ulrich Drepper.
1076 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1078 * SHA-256 and SHA-512 based password encryption.
1079 Implemented by Ulrich Drepper.
1081 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1082 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1085 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1086 Implemented by Ulrich Drepper.
1090 * The following bugs are resolved with this release:
1092 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1093 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1094 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1095 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1096 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1097 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1098 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1101 * New Linux interfaces: epoll_pwait, sched_getcpu.
1103 * New generic interfaces: strerror_l.
1105 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1109 * The following bugs are resolved with this release:
1111 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1112 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1113 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1114 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1115 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1116 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1117 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1118 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1119 3225, 3251, 3252, 3253, 3273
1121 * For Linux, the sorting of addresses returned by getaddrinfo now also
1122 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1123 Implemented by Ulrich Drepper.
1125 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1126 Implemented by Ulrich Drepper.
1128 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1130 * New iconv module for MIK. Contributed by Alexander Shopov.
1132 * For sites with broken group and/or passwd database, the auto-propagate
1133 option of nscd can prevent creating ID lookup entries from the results
1134 of a name lookup and vice versa. This usually is no problem but some
1135 site might have problems with the default behavior.
1136 Implemented by Ulrich Drepper.
1138 * Iterating over entire database in NIS can be slow. With the
1139 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1140 to trade time for memory. The entire database will be read at once.
1141 Implemented by Ulrich Drepper.
1143 * The interfaces introduced in RFC 3542 have been implemented by
1146 * Support for the new ELF hash table format was added by Ulrich Drepper.
1148 * Support for priority inheritance mutexes added by Jakub Jelinek and
1151 * Support for priority protected mutexes added by Jakub Jelinek.
1153 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1154 or_IN, csb_PL, fy_NL, sr_ME.
1158 * More overflow detection functions.
1160 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1161 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1163 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1164 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1165 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1166 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1167 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1168 by Masahide Washizawa.
1170 * It is now possible to install audit libraries for the dynamic linker using
1171 LD_AUDIT. Implemented by Ulrich Drepper.
1173 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1174 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1175 For a libc and libpthread that works well on Linux 2.4 kernels, we
1176 recommend using the stable 2.3 branch.
1178 * The new function open_wmemstream acts like open_memstream,
1179 but uses a wchar_t wide character buffer.
1181 * The new function ppoll is an improved version of poll, similar to pselect.
1183 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1184 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1185 renameat, unlinkat, linkat, symlinkat, readlinkat.
1187 * New Linux kernel system calls: unshare,
1188 inotify_init, inotify_add_watch, inotify_rm_watch.
1190 * The euidaccess function is now also known by the alias eaccess,
1191 for compatibility with some other systems.
1193 * Timezone data updated to 2006b version.
1197 * The following bugs are resolved with this release:
1199 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1200 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1201 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1202 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1203 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1204 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1206 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1208 * As of this release, GCC 4 can be used to compile the C Library.
1210 * Timezone data updated to 2005m version.
1214 * The following bugs are resolved with this release:
1216 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1217 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1218 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1219 777, 787, 821, 822, 823, 825
1221 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1225 * Support for RFC 3678. Real implementations exist only for Linux so far.
1226 Implemented by Ulrich Drepper.
1228 * nscd can now cache entries persistently. Expiring entries are reloaded.
1229 For speedups the cache can be shared in memory with client processes.
1230 Implemented by Ulrich Drepper.
1232 * nscd can now perform SELinux checks.
1233 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1235 * getaddrinfo queries are now cached. Canonical name lookup is performed
1237 Implemented by Ulrich Drepper.
1239 * The nothrow function attribute is used when headers are used by gcc when
1240 compiling C code. This can avoid significant amounts of exception
1243 * The malloc functions perform more error checking and are stricter when
1244 it comes to reacting on errors. The default action is to terminate
1245 the process after showing an error message. Implemented by Ulrich Drepper.
1247 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1248 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1250 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1251 namespaces using the new function dlmopen(). This feature is of course,
1252 like most other dynamic loading functionality, not available in statically
1253 linked applications. Implemented by Ulrich Drepper.
1255 * Low-overhead boundary checking variants of string and some stdio functions
1256 were added. These are to be used in conjunction with a gcc patch by
1257 Jakub Jelinek which adds calls to these functions if possible.
1258 Implemented by Jakub Jelinek and Ulrich Drepper.
1260 * Old code for several operating systems and machine architectures that
1261 have not been in working condition in a long time have been removed from
1262 the main source tree maintained by the GNU C Library's maintainers.
1263 These files are now reside in the separate `ports' source module
1264 that is usable as an add-on when building the library.
1268 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1269 interrogate the dynamic linker, compatible with the Solaris interface.
1271 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1272 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1274 * getifaddrs now uses the netlink interface on Linux to get its information.
1275 Implemented by Thorsten Kukuk.
1277 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1278 Implemented by Ulrich Drepper.
1280 * support for non-executable stacks on x86 has been added. Changes mostly
1283 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1286 * getaddrinfo now performs destination address selection according to
1291 * Thread-safe interfaces for many functions that access locale data
1292 were added in version 2.3, but these features were omitted from NEWS.
1293 Many functions have variants with an `_l' suffix that take a `locale_t'
1294 object as a parameter rather than consulting the current locale.
1295 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1296 create and maintain `locale_t' objects. Additionally, the new function
1297 `uselocale' sets "the current locale" (as used by functions not so
1298 parameterized) set for an individual thread. These features were added
1299 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1301 * The functions getresuid, getresgid, setresuid, and setresgid, which
1302 have long been available on Linux, are now declared in <unistd.h>
1303 and are now also available on the Hurd.
1305 * ELF thread-local storage support (TLS) now works on x86-64.
1307 * The new dynamic string token $LIB is expanded in shared library names.
1308 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1310 * Aldy Hernandez contributed complete software floating point support for
1311 PowerPC machines with no FPU.
1313 * fexecve is implemented on Linux.
1315 * The `btowc' function should work at least twice as fast due to
1316 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1318 * With approriate thread add-ons cancelable functions are now implemented
1319 in libc.so as well. No need to call the function in libpthread. This
1320 change allowed to finally disable the incorrect and expensive handling
1321 of weak definition in ld.so.
1323 * Yet more PLT entries in libc.so have been removed. We finally arrived
1324 at the bare minimum. Startup times improved appropriately.
1326 * Support for the new Linux/x86 system call interface was added. The
1327 AT_SYSINFO auxiliary vector entry is recognized and handled.
1331 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1334 * iconv (the program and the interface) now accepts empty names (excluding
1335 options like //TRANSLIT) to mean "use charset of current locale".
1337 * localedef can now transliterate characters in strings which are not in
1338 the provided charmap. The information from the input locale is used.
1340 * Prelinking support was added for ELF targets. This requires additional
1341 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1343 * Read-only stdio streams now use mmap to speed up operation by eliminating
1344 copying and buffer underflows. To use add 'm' to the mode string of
1345 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1347 * The malloc functions were completely rewritten by Wolfram Gloger based
1348 on Doug Lea's malloc-2.7.0.c.
1350 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1351 implementation of regex.
1353 * Bruno Haible upgraded the iconv and locale implementation to support
1356 * Contents of the LC_* and LANG environment variables in the CEN style are
1357 not recognized anymore. It never was used. Change by Ulrich Drepper.
1359 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1360 thread-local storage (TLS) ABI on some platforms.
1361 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1363 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1364 EUC-JISX0213, and TSCII.
1366 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1367 BSD-compatible interface for getting all network interface addresses.
1368 Implementation for IPv4 by Roland McGrath.
1370 * Loading of locale data is faster due to the introduction of a locale
1371 archive. Implemented by Roland McGrath and Ulrich Drepper.
1373 * Startup times are significantly reduced by not using exported functions
1374 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1377 * Steven Munroe contributed a port to PowerPC64/Linux.
1381 * The Hurd now uses the GNU libio implementation of stdio rather than the
1382 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1384 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1385 with the same behavior as the Linux system call of the same name.
1389 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1390 128-bit long double format.
1392 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1393 IBM1161, and IBM1162 charsets.
1395 * Andreas Jaeger contributed a port to x86-64/Linux.
1397 * Peter Bruin contributed a port to PowerPC/Hurd.
1399 * libc functions using I/O streams now can handle wide-oriented streams
1402 * optimizations in the dynamic linker. Binaries created by recent binutils
1403 versions start up quicker due to reduced time spent on relocations.
1405 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1409 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1410 asinh, atanh, j0 for the 128-bit long double format.
1412 * Bruno Haible updated all the code handling Unicode in some form to
1413 support Unicode 3.1.
1415 * Speed of regex for single-byte locales is back to previous levels.
1416 Patch by Isamu Hasegawa.
1418 * Alpha, SPARC, and IA-64 now also using floating stacks.
1420 * Startup time of internationalized applications greatly improved through
1421 iconv cache. Use iconvconfig to generate the cache file.
1422 Contributed by Ulrich Drepper.
1424 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1425 severe performance problems. Patch by David Mosberger.
1427 * The Hurd port got a lot more functionality like AIO, various stdio
1428 extensions, etc. Mainly done by Roland McGrath.
1430 * mtrace can now lookup symbols in shared libraries.
1434 * Intel's IA-64 math library is largely integrated. It provides fast and
1435 accurate implementatations for most basic and standard math functions
1436 in float, double, and long double format.
1438 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1439 and asin for the 96-bit long double format and asin, log, tan for the
1440 128-bit long double format.
1442 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1443 The basic double functions exist today. Contributed by Abraham Ziv
1444 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1445 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1447 * An asynchronous name lookup library was added. The interface is designed
1448 after POSIX AIO. The proposal was circulated beforehand to get comments.
1449 No negative ones came in. Implemented by Ulrich Drepper.
1451 * Port to S390/64bit contributed by Martin Schwidefsky
1452 <schwidefsky@de.ibm.com>.
1454 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1455 of functions for Linux/IA-64.
1457 * The RPC code is now thread safe. Threads can now use the same service
1458 of different services at the same time. Patch by Eric Norum
1459 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1461 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1462 family of functions for Linux/S390.
1464 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1465 of functions for Linux/x86.
1467 * Port to Linux/CRIS contributed by Axis Communications.
1471 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1472 we can now check for namespace violations and missing declarations. The
1473 result is that almost all headers are now Unix-compliant (as defined in
1474 the upcoming XPG6). The negative side is that some programs might need
1475 corrections, too, if they depend on the incorrect form of the headers in
1476 previous versions which defined too many symbols and included too many
1479 * regex now handles multibyte character sets correctly.
1480 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1482 * iconv (the program) does now conform to the upcoming XPG6 and handles
1483 charmaps. Instead of the charset names the path of charmaps can be
1484 provided and the conversion happens based on this data.
1485 Contributed by Ulrich Drepper.
1487 * The locale program now provides detailed information about the installed
1492 only lists the names of the supported locales
1496 provides details such as country, language, and codeset name.
1497 Contributed by Ulrich Drepper.
1501 * The gencat program now parses the input file according to the charset
1502 selected by the LC_CTYPE category. This is important for stateful
1503 character sets. To make generating catalogs easier there is a way
1504 to overwrite the charset selected by the locale: before the first
1505 message or $ quote line the catalog can contain a line like
1507 $ codeset=ISO-8859-2
1509 to select the charset (ISO-8859-2 in this case).
1511 Implemented by Shinya Hanataka and Ulrich Drepper.
1513 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1514 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1515 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1517 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1518 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1520 * The LANGUAGE environment variable is now ignored unless the locale is
1521 changed from the default "C" locale.
1523 * The usual bug fixes.
1527 * Greg McGary added runtime support for bounds checking using gcc's
1528 new -fbounded-pointers option. ix86 target is complete. PowerPC
1531 * Thorsten Kukuk added secure mode support to nscd.
1533 * The Berkeley db libraries have been removed.
1535 Related, the nss_db module is now in a separate package since it
1536 obviously requires a database library being available.
1538 * Wide character I/O streams implemented by Ulrich Drepper.
1540 * Functions from the extended socket API added by Ulrich Drepper.
1542 * Functions feenableexcept and fedisableexcept to control the
1543 behaviour of individual exceptions have been added by Andreas Jaeger.
1545 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1547 * The resolver code has been updated from bind 8.2.3-T5B which supports
1548 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1551 This change could in some situations effect backward compatibility. Since
1552 now `_res' is a thread-local instead of a global variable, modifying it
1553 in one thread does not have any effect in other threads.
1555 The resolver library was also extended to allow IPv6 as the transport
1556 protocol for the requests. This work was done by Stig Venaas.
1558 * Compatibility code for K&R C compilers has been removed from the
1559 header files. A ISO C compiler is needed to use the library
1560 (conforming to either C89 or C99 standard).
1562 * Complete rewrite of the localedef program to support multibyte character
1563 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1564 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1565 Implemented by Ulrich Drepper.
1567 Bruno Haible significantly improved the generation and use of the data
1568 structures for the wide character tables.
1570 * Plural handling in gettext implemented by Ulrich Drepper.
1572 * The utmp daemon has been removed.
1574 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1576 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1579 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1581 * POSIX barriers implemented by Kaz Kylheku.
1583 * POSIX spawn function family implemented by Ulrich Drepper.
1585 * POSIX spinlocks are now available.
1587 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1589 * the configure option --enable-kernel=X.Y.Z allows to strip out
1590 compatibility for kernel versions before X.Y.Z. This is currently only
1591 implemented for Linux.
1593 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1594 field sin6_scope_id. This means that all programs using IPv6 should be
1595 recompiled. Don't expect binary compatibility with previous glibc
1598 * various conversion modules for IBM character sets contributed by
1601 * IA-64 port by Jes Sorensen and HJ Lu.
1615 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1617 * New xdr functions are added; some rpc functions are now 64bit clean.
1619 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1621 * Fixed known incompatibilities with glibc 2.0.
1623 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1625 * Optimized a number of functions (especially the ELF dynamic loader).
1627 * Update timezone data files.
1629 * lots of charmaps corrections
1631 * some new locale definitions and charmaps
1636 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1637 conform to POSIX member type requirements. Symbol versions have been
1638 adjusted as needed within the library, and for direct use by applications,
1639 but there is potential for problems if third-party libraries use
1640 struct timeval as part of their interface. This does not present
1641 a problem for X and other "essential" system libraries.
1643 * An additional locale model to support C++ Standard Library locale
1644 model and probably more was implemented by Ulrich Drepper.
1646 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1649 * Miles Bader provided the `argp' function family to support hierachical
1650 command line argument parsing, layered on top of getopt.
1652 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1654 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1657 * scanf recognizes the %a and %A format for scanning floating point numbers.
1659 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1660 information and interfaces for the available integer types.
1662 * about 130 new math functions were added to implement the ISO C9x math
1665 * the new header <complex.h> contains definitions of the complex math
1666 functions from ISO C 9X.
1668 * the new header <tgmath.h> defines generic macros to use complex or
1669 real valued functions.
1671 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1673 * Andreas Jaeger provided a test suite for the math library.
1675 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1677 * Ulrich Drepper added character set conversion functions (iconv).
1679 * Optimized string functions have been added.
1681 * The localedata addon is now part of glibc.
1683 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1685 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1686 daemon for NSS (nscd).
1688 Missing a better place here are some numbers on improvements. Under
1689 Linux 2.1.125 un-tar-ing the kernel sources takes
1693 using local files 12.19s 6.88s 22.91s
1695 using NIS 13.92s 8.91s 26.34s
1697 using NIS & nscd 10.37s 7.34s 25.30s
1699 using NIS+ 27.57s 30.37s 640.46s
1701 using NIS+ & nscd 10.25s 7.83s 26.51s
1703 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1705 Keep in mind that non-namelookup related operations dominate above times.
1706 It was just a common complain that using NIS+ unpacking the kernel is
1709 [1] The old nscd implementation is not available anymore since it was
1710 distributed with glibc up to version 2.0.98 and thus is now replaced.
1712 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1714 * Mark Kettenis provided a Hesiod NSS module.
1716 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1717 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1719 * rcmd can now handle netgroups (Dick Streefland).
1721 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1724 * Support for the IPv6 protocol has been added to the socket API, as per the
1725 latest draft standards.
1727 * Support for Linux 2.2 has been added.
1729 * Interface changes relative to the latest 2.0.x release:
1730 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1731 addseverity NEW: Unix98
1732 alphasort64 NEW: LFS
1733 argp_err_exit_status NEW: argp, GNU ext
1734 argp_error NEW: argp, GNU ext
1735 argp_failure NEW: argp, GNU ext
1736 argp_help NEW: argp, GNU ext
1737 argp_parse NEW: argp, GNU ext
1738 argp_program_bug_address NEW: argp, GNU ext
1739 argp_program_version NEW: argp, GNU ext
1740 argp_program_version_hook NEW: argp, GNU ext
1741 argp_state_help NEW: argp, GNU ext
1742 argp_usage NEW: argp, GNU ext
1743 authdes_create NEW: Secure RPC
1744 authdes_getucred NEW: Secure RPC
1745 authdes_pk_create NEW: Secure RPC
1746 backtrace NEW: GNU ext.
1747 backtrace_symbols NEW: GNU ext.
1748 backtrace_symbols_fd NEW: GNU ext.
1750 cacosf NEW: ISO C 9x
1751 cacosh NEW: ISO C 9x
1752 cacoshf NEW: ISO C 9x
1753 cacoshl NEW: ISO C 9x
1754 cacosl NEW: ISO C 9x
1761 casinf NEW: ISO C 9x
1762 casinh NEW: ISO C 9x
1763 casinhf NEW: ISO C 9x
1764 casinhl NEW: ISO C 9x
1765 casinl NEW: ISO C 9x
1767 catanf NEW: ISO C 9x
1768 catanh NEW: ISO C 9x
1769 catanhf NEW: ISO C 9x
1770 catanhl NEW: ISO C 9x
1771 catanl NEW: ISO C 9x
1772 cbc_crypt NEW: Secure RPC
1776 ccoshf NEW: ISO C 9x
1777 ccoshl NEW: ISO C 9x
1783 cimagf NEW: ISO C 9x
1784 cimagl NEW: ISO C 9x
1785 clearerr_locked REMOVED
1786 clntunix_create NEW: sunrpc ext
1788 clog10 NEW: ISO C 9x
1789 clog10f NEW: ISO C 9x
1790 clog10l NEW: ISO C 9x
1800 cprojf NEW: ISO C 9x
1801 cprojl NEW: ISO C 9x
1803 crealf NEW: ISO C 9x
1804 creall NEW: ISO C 9x
1809 csinhf NEW: ISO C 9x
1810 csinhl NEW: ISO C 9x
1813 csqrtf NEW: ISO C 9x
1814 csqrtl NEW: ISO C 9x
1818 ctanhf NEW: ISO C 9x
1819 ctanhl NEW: ISO C 9x
1821 des_setparity NEW: Secure RPC
1822 ecb_crypt NEW: Secure RPC
1823 endutxent NEW: Unix98
1825 exp10f NEW: ISO C 9x
1826 exp10l NEW: ISO C 9x
1830 fattach NEW: STREAMS
1831 fdetach NEW: STREAMS
1835 feclearexcept NEW: ISO C 9x
1836 fegetenv NEW: ISO C 9x
1837 fegetexceptflag NEW: ISO C 9x
1838 fegetround NEW: ISO C 9x
1839 feholdexcept NEW: ISO C 9x
1841 feraiseexcept NEW: ISO C 9x
1842 ferror_locked REMOVED
1843 fesetenv NEW: ISO C 9x
1844 fesetexceptflag NEW: ISO C 9x
1845 fesetround NEW: ISO C 9x
1846 fetestexcept NEW: ISO C 9x
1847 feupdateenv NEW: ISO C 9x
1848 fflush_locked REMOVED
1852 fgets_unlocked NEW: GNU ext.
1853 fileno_locked REMOVED
1865 fputc_locked REMOVED
1866 fputs_unlocked NEW: GNU ext.
1867 fread_unlocked NEW: GNU ext.
1872 fstatvfs NEW: Unix98
1876 ftruncate64 NEW: LFS
1878 fwrite_unlocked NEW: GNU ext.
1879 gai_strerror NEW: IPv6
1883 getchar_locked REMOVED
1885 getdate_err NEW: Unix98
1886 getdate_r NEW: GNU ext.
1888 getnameinfo NEW: IPv6
1889 getnetname NEW: Secure RPC
1890 getpmsg NEW: STREAMS
1891 getpt NEW: Unix98 PTY
1892 getrlimit64 NEW: LFS
1893 getutxent NEW: Unix98
1894 getutxid NEW: Unix98
1895 getutxline NEW: Unix98
1896 glob64 NEW: GNU ext.
1897 globfree64 NEW: GNU ext.
1898 gnu_get_libc_release NEW: GNU ext.
1899 gnu_get_libc_version NEW: GNU ext.
1900 grantpt NEW: Unix98 PTY
1901 host2netname NEW: Secure RPC
1903 iconv_close NEW: iconv
1904 iconv_open NEW: iconv
1905 if_freenameindex NEW: IPv6
1906 if_indextoname NEW: IPv6
1907 if_nameindex NEW: IPv6
1908 if_nametoindex NEW: IPv6
1909 in6addr_any NEW: IPv6
1910 in6addr_loopback NEW: IPv6
1911 inet6_isipv4mapped NEW: IPv6
1912 isastream NEW: STREAMS
1913 iswblank NEW: GNU ext.
1914 key_decryptsession NEW: Secure RPC
1915 key_decryptsession_pk NEW: Secure RPC
1916 key_encryptsession NEW: Secure RPC
1917 key_encryptsession_pk NEW: Secure RPC
1918 key_gendes NEW: Secure RPC
1919 key_get_conv NEW: Secure RPC
1920 key_secretkey_is_set NEW: Secure RPC
1921 key_setnet NEW: Secure RPC
1922 key_setsecret NEW: Secure RPC
1923 llrint NEW: ISO C 9x
1924 llrintf NEW: ISO C 9x
1925 llrintl NEW: ISO C 9x
1926 llround NEW: ISO C 9x
1927 llroundf NEW: ISO C 9x
1928 llroundl NEW: ISO C 9x
1933 lrintf NEW: ISO C 9x
1934 lrintl NEW: ISO C 9x
1935 lround NEW: ISO C 9x
1936 lroundf NEW: ISO C 9x
1937 lroundl NEW: ISO C 9x
1939 makecontext NEW: Unix98
1940 mempcpy NEW: GNU ext.
1943 modify_ldt NEW: kernel
1947 nearbyint NEW: ISO C 9x
1948 nearbyintf NEW: ISO C 9x
1949 nearbyintl NEW: ISO C 9x
1950 netname2host NEW: Secure RPC
1951 netname2user NEW: Secure RPC
1952 nexttoward NEW: ISO C 9x
1953 nexttowardf NEW: ISO C 9x
1954 nexttowardl NEW: ISO C 9x
1958 passwd2des NEW: Secure RPC
1960 pow10f NEW: GNU ext.
1961 pow10l NEW: GNU ext.
1964 printf_size NEW: GNU ext.
1965 printf_size_info NEW: GNU ext.
1966 profil_counter REMOVED
1967 pthread_mutexattr_getkind_np REPLACED
1968 pthread_mutexattr_setkind_np REPLACED
1969 ptsname NEW: Unix98 PTY
1970 ptsname_r NEW: Unix98 PTY
1972 putchar_locked REMOVED
1973 putgrent NEW: GNU ext.
1975 putpmsg NEW: STREAMS
1976 pututxline NEW: Unix98
1980 readdir64_r NEW: LFS
1981 remquo NEW: ISO C 9x
1982 remquof NEW: ISO C 9x
1983 remquol NEW: ISO C 9x
1985 roundf NEW: ISO C 9x
1986 roundl NEW: ISO C 9x
1988 scalbln NEW: ISO C 9x
1989 scalblnf NEW: ISO C 9x
1990 scalblnl NEW: ISO C 9x
1992 sendfile NEW: kernel
1993 setcontext NEW: Unix98
1994 setrlimit64 NEW: LFS
1995 setutxent NEW: Unix98
1997 sigignore NEW: Unix98
1998 sigqueue NEW: POSIX.1b
1999 sigrelse NEW: Unix98
2000 sigset NEW: POSIX.1b
2001 sigtimedwait NEW: POSIX.1b
2002 sigwaitinfo NEW: POSIX.1b
2003 sincos NEW: GNU ext.
2004 sincosf NEW: GNU ext.
2005 sincosl NEW: GNU ext.
2009 strcasestr NEW: GNU ext.
2010 strtoimax NEW: ISO C 9x
2011 strtoumax NEW: ISO C 9x
2012 strverscmp NEW: GNU ext.
2013 svcauthdes_stats NEW: Secure RPC
2014 svcunix_create NEW: sunrpc etx
2015 svcunixfd_create NEW: sunrpc ext
2016 swapcontext NEW: Unix98
2017 tcgetsid NEW: Unix98 PTY
2018 tdestroy NEW: GNU ext.
2019 tgamma NEW: ISO C 9x
2020 tgammaf NEW: ISO C 9x
2021 tgammal NEW: ISO C 9x
2025 truncf NEW: ISO C 9x
2026 truncl NEW: ISO C 9x
2028 unlockpt NEW: Unix98 PTY
2029 updwtmpx NEW: Unix98
2030 user2netname NEW: Secure RPC
2031 utmpxname NEW: Unix98
2032 versionsort NEW: GNU ext.
2033 versionsort64 NEW: GNU ext.
2035 wcscasecmp NEW: GNU ext.
2036 wcsncasecmp NEW: GNU ext.
2037 wcsnlen NEW: GNU ext.
2038 wcstoimax NEW: ISO C 9x
2039 wcstoll NEW: ISO C 9x
2040 wcstoull NEW: ISO C 9x
2041 wcstoumax NEW: ISO C 9x
2043 wordexp NEW: POSIX.2
2044 wordfree NEW: POSIX.2
2045 write_profiling REMOVED
2046 xdecrypt NEW: Secure RPC
2047 xdr_authdes_cred NEW: Secure RPC
2048 xdr_authdes_verf NEW: Secure RPC
2049 xdr_cryptkeyarg NEW: Secure RPC
2050 xdr_cryptkeyarg2 NEW: Secure RPC
2051 xdr_cryptkeyres NEW: Secure RPC
2052 xdr_getcredres NEW: Secure RPC
2053 xdr_key_netstarg NEW: Secure RPC
2054 xdr_key_netstres NEW: Secure RPC
2055 xdr_keybuf NEW: Secure RPC
2056 xdr_keystatus NEW: Secure RPC
2057 xdr_netnamestr NEW: Secure RPC
2058 xdr_sizeof NEW: Secure RPC
2059 xdr_unixcred NEW: sunrpc ext
2060 xencrypt NEW: Secure RPC
2061 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2072 * inet_ntoa is thread-safe
2074 * updwtmp is moved from libutil to libc
2076 * rewrite of cbrt function
2078 * update of timezone data
2092 * add atoll function
2094 * fix complex problems in Berkeley DB code
2096 * fix math functions
2100 * fixed lots of header problems (especially Linux/GNU specific)
2102 * dynamic loader preserves all registers
2104 * Roland McGrath provided support for handling of auxiliary objects in
2105 the ELF dynamic loader.
2107 * support for parallel builds is improved
2111 * GNU extensions are no longer declared by default. To enable them you
2112 must define the macro `_GNU_SOURCE' in your program or compile with
2115 * The library has changed from using GNU ld symbol aliases to using weak
2116 symbols where available. The ELF object file format supports weak
2117 symbols; GNU ld also supports weak symbols in the a.out format. (There
2118 is also now support for other GNU ld extensions in ELF. Use the
2119 `--with-elf' option to configure to indicate you have ELF, and
2120 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2121 of many files which contained only symbol aliases, reducing the size of
2122 the source and the compiled library; many other files were renamed to
2123 less cryptic names previously occupied by the symbol alias files.
2124 There is a new header file <elf.h> for programs which operate on
2125 files in the ELF format.
2127 * Converted to Autoconf version 2, so `configure' has more options.
2128 Run `configure --help' to see the details.
2130 * The library can now be configured to build profiling, highly-optimized
2131 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2132 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2133 `configure' enable building these extra libraries. The shared library is
2134 built by default when using both ELF and GNU ld. When shared libraries
2135 are enabled, the new library `-ldl' is available for arbitrary run-time
2136 loading of shared objects; its interface is defined in <dlfcn.h>. The
2137 new header file <link.h> gives access to the internals of the run-time
2138 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2139 application of same name on other systems and it provides information
2140 about dynamically linked binaries.
2142 * The C library now provides the run-time support code for profiling
2143 executables compiled with `-pg'. Programs can control the profiling code
2144 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2145 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2146 the support for this file format was contributed by David Mosberger-Tang.
2148 * The math code has been replaced with a math library based on fdlibm from
2149 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2150 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2151 functions. The math functions now reside in a separate library, so
2152 programs using them will need to use `-lm' their linking commands.
2154 * John C. Bowman contributed optimized ix87 assembler inline functions.
2156 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2157 mechanism similar to that found in Solaris 2. This is now used for the
2158 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2159 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2160 file controls what services are used for each individual database. This
2161 works by loading shared libraries with names specified in `nsswitch.conf',
2162 so service modules can be changed or added at any time without even
2163 relinking any program. Currently there are the file, db, and NIS based
2164 NSS services available.
2166 * The new functions `strtoq' and `strtouq' parse integer values from
2167 strings, like `strtol' and `strtoul', but they return `long long int' and
2168 `unsigned long long int' values, respectively (64-bit quantities).
2170 * The new functions `strtof' and `strtold' parse floating-point values from
2171 strings, like `strtod', but they return `float' and `long double' values,
2172 respectively (on some machines `double' and `long double' are the same).
2174 * Ulrich Drepper has contributed new implementations of the floating-point
2175 printing and reading code used in the `printf' family of functions and
2176 `strtod', `strtof', and `strtold'. These new functions are perfectly
2177 accurate, and much faster than the old ones.
2179 * The implementation of the POSIX locale model was completely rewritten by
2180 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2181 to compile the POSIX locale definition.
2183 * The former dummy implementations of the strcoll and strxfrm function are
2184 now replaced by fully functional code contributed by Ulrich Drepper. The
2185 collation information comes from the POSIX locale definitions.
2187 * The new header <langinfo.h> defines an interface for accessing
2188 various locale-dependent data (using the locale chosen with `setlocale').
2190 * Ulrich Drepper has contributed a new suite of functions for operation on
2191 wide-character and multibyte-character strings, in <wchar.h>;
2192 and classification and case conversion of wide characters, in <wctype.h>.
2193 These new functions are conforming to the ISO C, Amendement 1 specification.
2195 * There is now a second implementation of the standard I/O library available.
2196 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2197 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2199 * You can now use positional parameter specifications in format strings
2200 for the `printf' and `scanf' families of functions. For example,
2201 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2202 ``Number 6, Mr Jones''. This is mainly useful when providing different
2203 format strings for different languages, whose grammars may dictate
2204 different orderings of the values being printed. To support this
2205 feature, the interface for `register_printf_handler' has changed; see
2206 the header file <printf.h> for details.
2208 * The `printf' and `scanf' families of functions now understand a new
2209 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2210 to group numbers as indicated by the locale; for `scanf' and friends, this
2211 says to accept as valid only a number with all the proper grouping
2212 separators in the right places. In the default "C" locale, numbers are
2213 not grouped; but locales for specific countries will define the usual
2214 conventions (i.e. separate thousands with `,' in the US locale).
2216 * The pgrp functions have been regularized, slightly incompatibly but much
2217 less confusingly. The core functions are now `getpgid' and `setpgid',
2218 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2219 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2220 provided for compatibility. There is no longer an incompatible `getpgrp'
2221 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2223 * The new header file <fts.h> and suite of functions simplify programs that
2224 operate on directory trees. This code comes from 4.4 BSD.
2226 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2227 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2228 NSS scheme used in glibc.
2230 * There is a new malloc debugging hook `__memalign_hook'.
2232 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2233 `unsigned int' in <sys/types.h>. These are for compatibility only and
2234 their use is discouraged.
2236 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2237 done differently, so that it works even without GNU ld.
2239 * New function `euidaccess' checks allowed access to a file like `access',
2240 but using the effective IDs instead of the real IDs.
2242 * The time zone data files have been updated for the latest and greatest
2243 local time conventions of the countries of the world.
2245 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2248 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2249 for formatting floating-point numbers. They are provided only for
2250 compatibility; new programs should use `sprintf' instead. There are
2251 also equivalent function for the `long double' floating-point type and
2252 all functions also exist in a reentrant form.
2254 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2255 functions for maintaining the login-record files (primarily of use to
2256 system programs such as `login'), and convenient functions for
2257 allocating and initializing a pseudo-terminal (pty) device.
2259 * Ulrich Drepper has contributed new support for System V style
2260 shared memory and IPC on systems that support it.
2262 * Ulrich Drepper has contributed several miscellaneous new functions found
2263 in System V: The `hsearch' family of functions provide an effective
2264 implementation of hash tables; `a64l' and `l64a' provide a very simple
2265 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2268 * Ulrich Drepper has contributed new reentrant counterparts for the
2269 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2271 * Ulrich Drepper has contributed new, highly-optimized versions of several
2272 string functions for the i486/Pentium family of processors.
2274 * Ulrich Drepper has updated the Linux-specific code, based largely
2275 on work done in Hongjiu Lu's version of GNU libc for Linux.
2276 The GNU library now supports Linux versions 2.0.10 and later,
2277 using the ELF object file format (i[3456]86-*-linux).
2279 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2281 * David Mosberger-Tang and Richard Henderson have ported the C library
2282 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2283 dynamic linking support for ELF/Alpha.
2285 * Richard Henderson contributed several Alpha optimized assembler function
2286 for arithmetic and string handling.
2288 * Ulrich Drepper has contributed a new set of message catalog functions to
2289 support multiple languages using the <libintl.h> interface, for use with
2290 his new package GNU gettext. Translation volunteers have contributed
2291 catalogs of the library's messages in Spanish, German, and Korean.
2293 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2294 program and the `catgets' function for reading the catalog files it
2295 creates. (The <libintl.h> interface is preferred; we include the
2296 <nl_types.h> interface using `catgets' only for source compatibility with
2297 programs already written to use it.)
2299 * New header file <values.h> gives SVID-compatible names for <limits.h>
2302 * Various new macros, declarations, and small header files for compatibility
2305 * New function `group_member' is a convenient way to check if a process has
2306 a given effective group ID.
2308 * When using GCC 2.7 and later, the socket functions are now declared in a
2309 special way so that passing an argument of type `struct sockaddr_in *',
2310 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2311 `struct sockaddr *' type, does not generate a type-clash warning.
2313 * New function `error' declared in header file <error.h> is a convenient
2314 function for printing error messages and optionally exiting; this is the
2315 canonical function used in GNU programs. The new functions `err', `warn',
2316 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2317 doing the same thing.
2319 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2320 POSIX.2 `glob' function to do ~ and {...} expansion.
2322 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2323 `clearenv' which is used in POSIX.9 is also available.
2325 * New function `getsid' returns session ID number on systems that support it.
2327 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2328 files <db.h> and <mpool.h> provide a rich set of functions for several
2329 types of simple databases stored in memory and in files, and <ndbm.h> is
2330 an old `ndbm'-compatible interface using the `db' functions. Link with
2331 `-ldb' to get these functions.
2333 * New macro `strdupa' copies a string like `strdup', but uses local stack
2334 space from `alloca' instead of dynamic heap space from `malloc'.
2336 * New function `strnlen' is like `strlen' but searches only a given maximum
2337 number of characters for the null terminator. `stpncpy', `strndup' and
2338 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2341 * New function `statfs' in header <sys/statfs.h>.
2343 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2344 provide convenient functions for operating on blocks of null-terminated
2347 * A new suite of functions in <utmp.h> handle all the details of reading
2348 and writing the utmp file.
2350 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2353 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2354 completely POSIX compliant and also implemented the extended functionality
2355 to handle alternate digit representation and alternate era date formats.
2357 * Ulrich Drepper provided an implementation of the `strptime' function
2358 defined in XPG4.2 which transforms a string into a `struct tm' value.
2360 * Paul Eggert provided the tzselect shell script as part of the timezone
2361 code. The shell script makes it easy to select the correct timezone
2364 * The implementation of the malloc family of functions is completely replaced
2365 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2366 The implementation uses the mmap function (if available) and it is
2367 optimized for the use in multi threaded programs.
2369 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2370 functions. This new functionality is usable by specifying a special
2371 salt string and it is compatible with implementation on *BSD systems.
2373 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2374 `getsubopt' to handle second level command line options, `bsd_signal'
2375 to access BSD style `signal' functionality, the obsolete `regexp' style
2378 * the `lchown' function is available on system which support this
2381 * The implementation of the shadow password handling function was contributed
2384 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2386 * POSIX.1g support was added. The <sys/select.h> header is available,
2387 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2388 implementation of `getaddrinfo'.
2392 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2394 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2395 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2397 * The new function `daemon' from 4.4 BSD is useful for server programs that
2398 want to put themselves in the background.
2400 * Joel Sherrill has contributed support for several standalone boards that
2401 run without an operating system.
2403 * `printf', `scanf' and friends now accept a `q' type modifier for long
2404 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2406 * All of the code taken from BSD (notably most of the math and networking
2407 routines) has been updated from the BSD 4.4-Lite release.
2409 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2411 * The new functions `getdomainname' and `setdomainname' fetch or change the
2412 YP/NIS domain name. These are system calls which exist on systems which
2415 * The time zone data files have been updated for the latest international
2418 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2419 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2423 * The C library now includes support for Sun RPC, from Sun's free
2424 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2425 are included. (There is still no support for YP.)
2427 * Tom Quinn has contributed a port of the C library to SGI machines running
2428 Irix 4 (mips-sgi-irix4).
2430 * The new `lockf' function is a simplified interface to the locking
2431 facilities of `fcntl', included for compatibility.
2433 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2435 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2437 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2440 * The error message printed by `assert' for a failed assertion now includes
2441 the name of the program (if using GNU ld) and the name of the calling
2442 function (with versions of GCC that support this).
2444 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2446 * The library now includes the <sys/mman.h> header file and memory
2447 management functions `mmap', `munmap', `mprotect', `msync', and
2448 `madvise', on systems that support those facilities.
2450 * The interface for `mcheck' has changed slightly: the function called to
2451 abort the program when an allocation inconsistency is detected now takes
2452 an argument that indicates the type of failure. The new function
2453 `mprobe' lets you request a consistency check for a particular block at
2454 any time (checks are normally done only when you call `free' or `realloc'
2457 * It is now possible to easily cross-compile the C library, building on one
2458 system a library to run on another machine and/or operating system. All
2459 you need to do is set the variable `HOST_CC' in `configparms' to the
2460 native compiler for programs to run on the machine you are building on (a
2461 few generator programs are used on Unix systems); set `CC' to the
2464 * The new function `fexecve' (only implemented on the GNU system) executes
2465 a program file given a file descriptor already open on the file.
2469 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2470 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2472 * You can set the variable `libprefix' in `configparms' to specify a prefix
2473 to be prepended to installed library files; this makes it easy to install
2474 the GNU C library to be linked as `-lgnuc' or whatever.
2476 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2477 copies a limited number of characters from a string, and returns the
2478 address of the last character written.
2480 * You no longer need to check for whether the installed `stddef.h' is
2481 compatible with the GNU C library. configure now checks for you.
2483 * You can now define a per-stream `fileno' function to convert the
2484 stream's cookie into an integral file descriptor.
2486 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2487 allocates zero bytes of storage, and returns a unique pointer which
2488 you can pass to `realloc' or `free'. The behavior is undefined if
2489 you dereference this pointer.
2491 * The C library now runs on Sony NEWS m68k machines running either
2492 NewsOS 3 or NewsOS 4.
2494 * The new `syscall' function is a system-dependent primitive function
2495 for invoking system calls. It has the canonical behavior on Unix
2496 systems, including unreliable return values for some calls (such as
2497 `pipe', `fork' and `getppid').
2499 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2500 to `EAGAIN', which is the preferred name. On systems whose kernels
2501 use two distinct codes, the C library now translates EWOULDBLOCK to
2502 EAGAIN in every system call function.
2506 * The GNU C Library Reference Manual is now distributed with the library.
2507 `make dvi' will produce a DVI file of the printed manual.
2508 `make info' will produce Info files that you can read on line using C-h i
2509 in Emacs or the `info' program.
2510 Please send comments on the manual to bug-glibc-manual@gnu.org.
2512 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2514 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2516 * Jason Merrill has contributed a port to the Sequent Symmetry running
2517 Dynix version 3 (i386-sequent-dynix).
2519 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2520 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2522 * New function `memory_warnings' lets you arrange to get warnings when
2523 malloc is running out of memory to allocate, like Emacs gives you.
2525 * The C library now contains the relocating allocator used in Emacs 19 for
2526 its editing buffers. This allocator (ralloc) minimizes allocation
2527 overhead and fragmentation by moving allocated regions around whenever it
2528 needs to. You always refer to a ralloc'd region with a "handle" (a
2529 pointer to a pointer--an object of type `void **').
2531 * There is a new `printf' format: `%m' gives you the string corresponding
2532 to the error code in `errno'.
2534 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2535 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2536 pass, the `a' modifier says to fill in a `char **' you pass with a
2539 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2540 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2541 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2543 * `mkstemp' is a traditional Unix function to atomically create and open a
2544 uniquely-named temporary file.
2548 * The standard location for the file that says what the local timezone is
2549 has changed again. It is now `/usr/local/etc/localtime' (or more
2550 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2552 * The distribution no longer contains any files with names longer than 14
2555 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2556 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2558 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2562 * The configuration process has changed quite a bit. The `configure'
2563 script is now used just like the configuration scripts for other GNU
2564 packages. The `sysdeps' directory hierarchy is much rearranged.
2565 The file `INSTALL' explains the new scheme in detail.
2567 * The header files no longer need to be processed into ANSI C and
2568 traditional C versions. There is just one set of files to install, and
2569 it will work with ANSI or old C compilers (including `gcc -traditional').
2571 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2572 MIPS DECStation running Ultrix 4.
2574 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2575 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2576 made itself into a shared library.
2578 * Yet further improved support for the i386, running 4.3 BSD-like systems
2579 (such as Mach 3 with the Unix single-server), or System V.
2581 * New function `strncasecmp' to do case-insensitive string comparison
2582 with limited length.
2584 * New function `strsep' is a reentrant alternative to `strtok'.
2586 * New functions `scandir' and `alphasort' for searching directories.
2588 * New function `setenv' is a better interface to `putenv'.
2590 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2591 function for traversing a directory tree.
2593 * The GNU obstack package is now also part of the C library.
2594 The new function `open_obstack_stream' creates a stdio stream that
2595 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2596 formatted output directly to an obstack.
2598 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2599 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2601 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2603 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2604 things to your strings.
2606 * There are some new test programs: test-fseek, testmb, and testrand.
2608 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2609 These ports are not finished, but are a good starting place for really
2610 supporting those systems.
2612 * `/etc/localtime' is now the standard location for the file that says what
2613 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2614 This follows the general principle that `/etc' is the place for all local
2615 configuration files.
2617 * The C library header files now use `extern "C"' when used by the C++
2618 compiler, so the C library should now work with C++ code.
2620 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2621 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2624 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2625 function which uses the `merge sort' algorithm, and is said to be
2626 significantly faster than the old GNU `qsort' function. Merge sort is
2627 now the standard `qsort' function. The new algorithm can require a lot
2628 of temporary storage; so, the old sorting function is called when the
2629 required storage is not available.
2631 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2632 provides the Unix `crypt' function, plus some other entry points.
2634 * The code and header files taken from 4.4 BSD have been updated with the
2635 latest files released from Berkeley.
2637 ----------------------------------------------------------------------
2638 Copyright information:
2640 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2642 Permission is granted to anyone to make or distribute verbatim copies
2643 of this document as received, in any medium, provided that the
2644 copyright notice and this permission notice are preserved,
2645 thus giving the recipient permission to redistribute in turn.
2647 Permission is granted to distribute modified versions
2648 of this document, or of portions of it,
2649 under the above conditions, provided also that they
2650 carry prominent notices stating who last changed them.
2653 version-control: never