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, 15319, 15467, 15790, 16560, 17569, 17792, 17912, 17932, 17944,
13 17949, 17964, 17965, 17967, 17969, 17978, 17987, 17991, 17996, 17999.
17 * The following bugs are resolved with this release:
19 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
20 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
21 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
22 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
23 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
24 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
25 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
26 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
27 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
28 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
31 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
32 too little memory for the to-be-scanned arguments and overflow the
33 allocated buffer. The implementation now correctly computes the required
34 buffer size when using malloc, and switches to malloc from alloca as
37 * A new semaphore algorithm has been implemented in generic C code for all
38 machines. Previous custom assembly implementations of semaphore were
39 difficult to reason about or ensure that they were safe. The new version
40 of semaphore supports machines with 64-bit or 32-bit atomic operations.
41 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
42 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
44 * Port to Altera Nios II has been contributed by Mentor Graphics.
46 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
47 implementations for powerpc64/powerpc64le.
48 Implemented by Adhemerval Zanella (IBM).
50 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
51 and powerpc64le. This may improve lock scaling of existing programs on
52 HTM capable systems. The lock elision code is only enabled with
53 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
54 powerpc will issue a transaction abort on every syscall to avoid side
55 effects being visible outside transactions.
57 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
58 AArch64. Contributed by ARM Ltd.
60 * i386 memcpy functions optimized with SSE2 unaligned load/store.
62 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
63 under certain input conditions resulting in the execution of a shell for
64 command substitution when the application did not request it. The
65 implementation now checks WRDE_NOCMD immediately before executing the
66 shell and returns the error WRDE_CMDSUB as expected.
68 * CVE-2012-3406 printf-style functions could run into a stack overflow when
69 processing format strings with a large number of format specifiers.
71 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
72 infinite loop if the DNS response contained a PTR record of an unexpected
75 * The minimum GCC version that can be used to build this version of the GNU
76 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
77 still be used to compile programs using the GNU C Library.
79 * The GNU C Library is now built with -Werror by default. This can be
80 disabled by configuring with --disable-werror.
82 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
84 * The obsolete sigvec function has been removed. This was the original
85 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
86 programs have been using instead for about 25 years. Of course, ABI
87 compatibility for old binaries using sigvec remains intact.
89 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
90 with newer versions of bison.
92 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
93 The original MIPS o32 hard-float ABI requires an FPU where double-precision
94 registers overlay two consecutive single-precision registers. MIPS32R2
95 introduced a new FPU mode (FR=1) where double-precision registers extend the
96 corresponding single-precision registers which is incompatible with the
97 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
98 require the use of FR=1 making a transition necessary. New o32 ABI
99 extensions enable users to migrate over time from the original o32 ABI
100 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
101 tracks the ABI of any loaded object and verifies that new objects are
102 compatible. Mode transitions will also be requested as required and
103 unsupportable objects will be rejected. The ABI checks include both soft and
104 hard float ABIs for o32, n32 and n64.
106 GCC 5 with GNU binutils 2.25 onwards:
107 It is strongly recommended that all o32 system libraries are built using the
108 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
109 with the original and all new o32 ABI extensions. Configure a MIPS GCC
110 compiler using --with-fp-32=xx to set this by default.
114 * The following bugs are resolved with this release:
116 6804, 9894, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347, 15514,
117 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198, 16275,
118 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447, 16516,
119 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600, 16609,
120 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639, 16642,
121 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689, 16695,
122 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739, 16740,
123 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791, 16796,
124 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849, 16854,
125 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912, 16915,
126 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958, 16965,
127 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022, 17031,
128 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078, 17079,
129 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150, 17153,
130 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
132 * Reverted change of ABI data structures for s390 and s390x:
133 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
134 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
135 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
136 are preserved pointing straight to the same implementation as the old ones.
137 Given that, new callers will simply provide a too-big buffer to these
138 functions. Any applications/libraries out there that embed jmp_buf or
139 ucontext_t in an ABI-relevant data structure that have already been rebuilt
140 against 2.19 headers will have to rebuilt again. This is necessary in any
141 case to revert the breakage in their ABI caused by the glibc change.
143 * Support for file description locks is added to systems running the
144 Linux kernel. The standard file locking interfaces are extended to
145 operate on file descriptions, not file descriptors, via the use of
146 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
147 are associated with an open file instead of a process.
149 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
151 * The minimum Linux kernel version that this version of the GNU C Library
152 can be used with is 2.6.32.
154 * Running the testsuite no longer terminates as soon as a test fails.
155 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
156 with PASS or FAIL lines for individual tests. A summary of the results is
157 printed, including a list of failing lists, and "make check" exits with
158 error status if there were any unexpected failures. "make check
159 stop-on-test-failure=y" may be used to keep the old behavior.
161 * The am33 port, which had not worked for several years, has been removed
164 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
165 supported; they now act the same as _DEFAULT_SOURCE (but generate a
166 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
167 conflicted with POSIX (support for which was removed in 2.19), the
168 interfaces those macros enabled remain available when compiling with
169 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
172 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
174 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
175 This may improve lock scaling of existing programs on TX capable systems.
176 The lock elision code is only built with --enable-lock-elision=yes and
177 then requires a GCC version supporting the TX builtins. With lock elision
178 default mutexes are elided via __builtin_tbegin, if the cpu supports
179 transactions. By default lock elision is not enabled and the elision code
182 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
183 copy the path argument. This allowed programs to cause posix_spawn to
184 deference a dangling pointer, or use an unexpected pathname argument if
185 the string was modified after the posix_spawn_file_actions_addopen
188 * All supported architectures now use the main glibc sysdeps directory
189 instead of some being in a separate "ports" directory (which was
190 distributed separately before glibc 2.17).
192 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
193 On configurations that support it (all Linux configurations), it's now
194 used regardless of the --enable-add-ons switch to configure. It is no
195 longer possible to build such configurations without pthreads support.
197 * Locale names, including those obtained from environment variables (LANG
198 and the LC_* variables), are more tightly checked for proper syntax.
199 setlocale will now fail (with EINVAL) for locale names that are overly
200 long, contain slashes without starting with a slash, or contain ".." path
201 components. (CVE-2014-0475) Previously, some valid locale names were
202 silently replaced with the "C" locale when running in AT_SECURE mode
203 (e.g., in a SUID program). This is no longer necessary because of the
206 * On x86-64, the dynamic linker's lazy-binding support is now compatible
207 with application code using Intel MPX instructions. (With all previous
208 versions, the MPX register state could be clobbered when making calls
209 into or out of a shared library.) Note that while the new dynamic
210 linker is compatible with all known x86 hardware whether or not it
211 supports Intel MPX, some x86 instruction-set emulators might fail to
212 handle the new instruction encodings. This is known to affect Valgrind
213 versions up through 3.9 (but will be fixed in the forthcoming 3.10
214 release), and might affect other tools that do instruction emulation.
216 * Support for loadable gconv transliteration modules has been removed.
217 The support for transliteration modules has been non-functional for
218 over a decade, and the removal is prompted by security defects. The
219 normal gconv conversion modules are still supported. Transliteration
220 with //TRANSLIT is still possible, and the //IGNORE specifier
221 continues to be supported. (CVE-2014-5119)
223 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
224 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
225 resulting a denial-of-service security vulnerability in applications which
226 use functions related to iconv. (CVE-2014-6040)
230 * The following bugs are resolved with this release:
232 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
233 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
234 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
235 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
236 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
237 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
238 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
239 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
240 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
241 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
242 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
243 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
244 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
245 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
246 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
247 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
248 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
249 16431, 16453, 16474, 16506, 16510, 16529
251 * Slovenian translations for glibc messages have been contributed by the
252 Translation Project's Slovenian team of translators.
254 * The public headers no longer use __unused nor __block. This change is to
255 support compiling programs that are derived from BSD sources and use
256 __unused internally, and to support compiling with Clang's -fblock
257 extension which uses __block.
259 * CVE-2012-4412 The strcoll implementation caches indices and rules for
260 large collation sequences to optimize multiple passes. This cache
261 computation may overflow for large collation sequences and may cause a
262 stack or buffer overflow. This is now fixed to use a slower algorithm
263 which does not use a cache if there is an integer overflow.
265 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
266 rules for large collation sequences to optimize multiple passes and falls
267 back to alloca if malloc fails, resulting in a possible stack overflow.
268 The implementation now falls back to an uncached collation sequence lookup
271 * CVE-2013-4788 The pointer guard used for pointer mangling was not
272 initialized for static applications resulting in the security feature
273 being disabled. The pointer guard is now correctly initialized to a
274 random value for static applications. Existing static applications need
275 to be recompiled to take advantage of the fix (bug 15754).
277 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
278 to the d_name member of struct dirent, or omit the terminating NUL
279 character. (Bugzilla #14699).
281 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
282 aligned_alloc functions could allocate too few bytes or corrupt the
283 heap when passed very large allocation size values (Bugzilla #15855,
286 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
287 for AF_INET6 has been fixed (Bugzilla #16072).
289 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
290 pap_CW, quz_PE, the_NP.
292 * Substantially revised locales: gd_GB, ht_HT
294 * The LC_ADDRESS field was updated to support country_car for almost all
297 * ISO 1427 definitions were updated.
299 * ISO 3166 definitions were updated.
301 * The localedef utility now supports --big-endian and --little-endian
302 command-line options to generate locales for a different system from that
303 for which the C library was built.
305 * Binary locale files now only depend on the endianness of the system for
306 which they are generated and not on other properties of that system. As a
307 consequence, binary files generated with new localedef may be incompatible
308 with old versions of the GNU C Library, and binary files generated with
309 old localedef may be incompatible with this version of the GNU C Library,
310 in the following circumstances:
312 + Locale files may be incompatible on m68k systems.
314 + Locale archive files (but not separate files for individual locales) may
315 be incompatible on systems where plain "char" is signed.
317 * The configure option --disable-versioning has been removed. Builds with
318 --disable-versioning had not worked for several years.
320 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
321 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
323 * SystemTap probes for malloc have been introduced.
325 * SystemTap probes for slow multiple precision fallback paths of
326 transcendental functions have been introduced.
328 * Support for powerpc64le has been added.
330 * The soft-float powerpc port now supports e500 processors.
332 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
334 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
335 set of header declarations that are enabled by default, even when other
336 feature test macros or compiler options such as -std=c99 would otherwise
337 disable some of those declarations.
339 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
340 conflict with POSIX. The libbsd-compat library (which was a dummy library
341 that did nothing) has also been removed.
343 * Preliminary documentation about Multi-Thread, Async-Signal and
344 Async-Cancel Safety has been added.
346 * Change of ABI data structures for s390 and s390x:
347 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
348 allow for future hardware extensions. All library functions that accept or
349 return these structures were versioned in order to provide backwards
350 compatibility with existing code. However, not all cases can be handled
351 with interface versioning. If an application embeds either structure into
352 another structure and that structure is passed to another compilation unit
353 which expects the newer larger-sized object then any access to the new
354 fields will result in undefined behaviour. Similarly any access to fields
355 that were moved by the enlarging of the structures will cause undefined
356 behaviour. To fix the undefined behaviour all objects that are part of the
357 final in-memory image must agree on the size of structures, and this may
358 require recompilation.
362 * The following bugs are resolved with this release:
364 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
365 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
366 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
367 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
368 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
369 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
370 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
371 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
372 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
373 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
374 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
375 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
376 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
379 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
380 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
381 Distributions can re-enable building and using pt_chown via the new configure
382 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
383 considerable security risks and should only be used if the distribution
384 understands and accepts the risks.
386 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
389 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
390 fixed (Bugzilla #15330).
392 * Add support for calling C++11 thread_local object destructors on thread
393 and program exit. This needs compiler support for offloading C++11
394 destructor calls to glibc.
396 * Improved worst case performance of libm functions with double inputs and
399 * Support for priority inherited mutexes in pthread condition variables on
400 non-x86 architectures.
402 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
404 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
406 * Optimized string functions for ARM. Implemented by Will Newton and
409 * Optimized libm functions for SPARC. Implemented by David S. Miller.
411 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
414 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
415 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
417 * Added a benchmark framework to track performance of functions in glibc.
419 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
420 It is based on draft TS 18661 and currently enabled as a GNU extension.
422 * On Linux, the clock function now uses the clock_gettime system call
423 for improved precision, rather than old times system call.
425 * Added support for version-3 tz format files. This is needed when using
426 the tz database release 2013e or later, and affects a few unusual cases --
427 currently only TZ='America/Godthab' for time stamps after 2037.
429 * Added new API functions pthread_getattr_default_np and
430 pthread_setattr_default_np to get and set the default pthread
431 attributes of a process.
433 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
434 This may improve lock scaling of existing programs on TSX capable systems.
435 When the --enable-lock-elision=yes parameter is specified at configure
436 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
439 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
440 availability). Implemented by Ryan S. Arnold.
442 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
446 * The following bugs are resolved with this release:
448 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
449 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
450 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
451 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
452 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
453 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
454 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
455 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
456 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
457 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
458 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
459 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
460 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
461 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
462 14879, 14889, 14893, 14898, 14914.
464 * Optimization of memcpy for MIPS.
466 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
467 EMFILE has been fixed (Bugzilla #14889).
469 * The add-on ports collection is now distributed in the "ports" subdirectory
470 of the main GNU C Library distribution, rather than separately.
472 * Port to ARM AArch64 contributed by Linaro.
474 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
475 Optimized versions of memcpy, memset, and memcmp added for System z10 and
477 Implemented by Andreas Krebbel.
479 * The new function secure_getenv allows secure access to the environment,
480 returning NULL if running in a SUID/SGID process. This function replaces
481 the internal function __secure_getenv.
483 * SystemTap static probes have been added into the dynamic linker.
484 Implemented by Gary Benson.
486 * Optimizations of string functions strstr, strcasestr and memmem.
487 Implemented by Maxim Kuvyrkov.
489 * The minimum Linux kernel version that this version of the GNU C Library
490 can be used with is 2.6.16.
492 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
493 powerpc POWER7. Implemented by Will Schmidt.
495 * New configure option --disable-nscd builds the C library such that it
496 never attempts to contact the Name Service Caching Daemon (nscd).
497 New configure option --disable-build-nscd avoids building nscd itself;
498 this is the default if --disable-nscd is used.
500 * Improved support for cross-compilation, including cross-testing and
501 bootstrap builds without a previously built glibc.
503 * Several testsuite tests are now able to test multiple IFUNC variants of an
504 interface, rather than just testing the one that would be chooen by
507 * New configure options --with-bugurl and --with-pkgversion, for
508 distributors to use to embed their bug-reporting and package version
509 information in --help and --version output.
511 * The ttyname and ttyname_r functions on Linux now fall back to searching for
512 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
513 allows creation of chroots without the procfs mounted on /proc.
515 * The `crypt' function now fails if passed salt bytes that violate the
516 specification for those values. On Linux, the `crypt' function will
517 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
518 enabled, and fail on encrypted strings using the MD5 or DES algorithm
519 when the mode is enabled.
521 * The `clock_*' suite of functions (declared in <time.h>) is now available
522 directly in the main C library. Previously it was necessary to link with
523 -lrt to use these functions. This change has the effect that a
524 single-threaded program that uses a function such as `clock_gettime' (and
525 is not linked with -lrt) will no longer implicitly load the pthreads
526 library at runtime and so will not suffer the overheads associated with
527 multi-thread support in other code such as the C++ runtime library.
529 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
534 * The following bugs are resolved with this release:
536 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
537 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
538 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
539 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
540 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
541 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
542 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
543 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
544 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
545 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
546 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
547 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
548 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
549 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
550 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
551 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
552 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
553 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
554 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
555 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
556 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
557 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
560 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
561 configuring glibc with:
562 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
563 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
564 Implemented by H.J. Lu.
568 + define static_assert
570 + do not declare gets
572 + declare at_quick_exit and quick_exit also for ISO C11
574 + aligned_alloc. NB: The code is deliberately allows the size parameter
575 to not be a multiple of the alignment. This is a moronic requirement
576 in the standard but it is only a requirement on the caller, not the
581 + uchar.h support added
583 + CMPLX, CMPLXF, CMPLXL added
585 Implemented by Ulrich Drepper.
587 * Support for the IA-64 has been moved to ports.
589 * Remove support for anything but ELF binary format
591 * Checking versions of poll, ppoll added.
592 Implemented by Ulrich Drepper.
594 * More generic and 64-bit performance optimizations to math functions.
595 Implemented by Ulrich Drepper.
597 * New configure option --enable-obsolete-rpc makes the deprecated RPC
598 headers and functions available at compile time as they were before
599 version 2.14. This option will be removed at some time in the future
600 after the TI-RPC library becomes fully sufficient for the needs of
601 existing applications.
603 * Compatibility code for Linux kernel versions before 2.4 has been removed.
604 Note that glibc is not expected to work with any Linux kernel version
607 * New header <sys/auxv.h> and function getauxval allowing easy access to
608 the AT_* key-value pairs passed from the Linux kernel. The header also
609 defines the HWCAP_* bits associated with the AT_HWCAP key.
611 * New locales: mag_IN
613 * New configure option --enable-systemtap builds SystemTap static probes
614 into libc for setjmp and longjmp and into libpthread for various operations.
615 So far the setjmp/longjmp probes and some of the libpthread probes are
616 provided only for i*86 and x86_64.
617 Implemented by Roland McGrath and Rayson Ho.
619 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
621 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
624 * More optimized functions for SPARC. Implemented by David S. Miller.
626 * Improved support for cross-compilation, especially bootstrap builds
627 without a previously built glibc.
629 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
630 Chris Metcalf from Tilera.
632 * Support for the old ARM ABI has been removed from ports. Only the EABI is
633 now supported for ARM processors.
635 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
636 as the name of the dynamic linker, to distinguish it from the
637 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
639 * Support for CRIS has been removed from ports.
641 * A new class of installed header has been documented for low-level
642 platform-specific functionality. PowerPC added the first instance with a
643 function to provide time base register access. Contributed by Tulio
644 Magno Quites Machado Filho.
646 * ix86 configurations now install header files that are consistent with
647 what x86-64 configurations install. These same header files can be used
648 for -m32, -m64, or -mx32 builds.
649 Contributed by H.J. Lu.
651 * Math library bug fixes. A thorough audit of all open math library bugs was
652 conducted by Joseph Myers. Significant progress was made on many math
653 library bugs resulting in more accurate exceptions and function results.
654 Many thanks to all those that contributed including Andreas Jaeger for his
655 patch review and work on the x87 trigonometric instruction issues.
657 * Timezone data is no longer installed. Timezone-related binaries and scripts
658 will continue to be installed. Users should obtain their timezone data from
659 their distribution provider or from the tzdata package at
660 <ftp://munnari.oz.au/pub/>.
664 * The following bugs are resolved with this release:
666 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
667 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
668 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
669 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
670 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
671 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
672 13484, 13506, 13515, 13523, 13524, 13538, 13540
674 * New program pldd to list loaded object of a process
675 Implemented by Ulrich Drepper.
677 * Add nss_db support back to glibc. No more dependency on Berkeley db
678 and support for initgroups lookups.
679 Implemented by Ulrich Drepper.
681 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
682 Contributed by HJ Lu.
684 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
685 Contributed by HJ Lu.
687 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
688 on x86-32 and x86-64.
689 Contributed by Liubov Dmitrieva.
691 * Optimized strchr and strrchr for SSE on x86-32.
692 Contributed by Liubov Dmitrieva.
694 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
695 for x86-64 and x86-32.
696 Contributed by Liubov Dmitrieva.
698 * New interfaces: scandirat, scandirat64
699 Implemented by Ulrich Drepper.
701 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
702 Implemented by Ulrich Drepper.
704 * nscd now also caches the netgroup database.
705 Implemented by Ulrich Drepper.
707 * Integrate libm with gcc's -ffinite-math-only option.
708 Implemented by Ulrich Drepper.
710 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
711 to math functions. Implemented by Ulrich Drepper.
713 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
714 Implemented by Ulrich Drepper.
716 * New Linux interfaces: process_vm_readv, process_vm_writev
718 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
719 Implemented by Ulrich Drepper.
721 * Optimized nearbyint and strcasecmp for PPC.
722 Implemented by Adhemerval Zanella.
724 * New locales: bho_IN, unm_US, es_CU, ta_LK
728 * The following bugs are resolved with this release:
730 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
731 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
732 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
733 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
734 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
735 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
736 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
737 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
738 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
739 12795, 12811, 12813, 12814, 12841
741 * The RPC implementation in libc is obsoleted. Old programs keep working
742 but new programs cannot be linked with the routines in libc anymore.
743 Programs in need of RPC functionality must be linked against TI-RPC.
744 The TI-RPC implementation is IPv6 enabled and there are other benefits.
746 Visible changes of this change include (obviously) the inability to link
747 programs using RPC functions without referencing the TI-RPC library and the
748 removal of the RPC headers from the glibc headers.
749 Implemented by Ulrich Drepper.
751 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
752 syncfs, setns, sendmmsg
754 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
755 yue_HK, lij_IT, mhr_RU
757 * New encodings: CP770, CP771, CP772, CP773, CP774
759 * New program sotruss to trace calls through PLTs
760 Implemented by Ulrich Drepper.
762 * The malloc hook implementation is marked deprecated and will be removed
763 from the default implementation in the next version. The design never
764 worked ever since the introduction of threads. Even programs which do
765 not create threads themselves can use multiple threads created internally.
769 * The following bugs are resolved with this release:
771 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
772 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
773 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
774 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
777 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
779 * POWER7 optimizations: memset, memcmp, strncmp
781 * New optimized string functions for x86-64: strnlen (SSE2),
782 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
783 Implemented by Ulrich Drepper.
787 * The following bugs are resolved with this release:
789 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
790 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
791 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
792 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
793 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
794 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
795 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
796 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
798 * New interfaces: pthread_getname_np, pthread_setname_np
800 * New Linux interface: recvmmsg
802 * STT_GNU_IFUNC implemented for Sparc by David Miller.
804 * The dynamic linker now recognizes supported ABI versions from the
805 EI_ABIVERSION field in the ELF header.
806 Implemented by Ulrich Drepper.
808 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
809 will not be used to fill in password fields in the passwd.byname replies.
810 Instead it is used to synthesize the shadow.byname table, should it be
811 missing. This is a useful mode in some installations involving Solaris.
812 Implemented by Ulrich Drepper.
814 * New locales: kok_IN, sq_MK, cv_RU
818 * The following bugs are resolved with this release:
820 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
821 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
822 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
823 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
824 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
825 10789, 10817, 10823, 10840, 10847
827 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
829 Implemented by Ulrich Drepper.
831 * Checking version of longjmp added that fails if an uninitialized stack
832 frame would be created. Implemented by Ulrich Drepper.
834 * STT_GNU_IFUNC is now supported in static executables.
835 Implemented by H.J. Lu.
837 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
839 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
840 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
841 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
842 Contributed by H.J. Lu.
844 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
845 Implemented by Ulrich Drepper.
847 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
849 Contributed by H.J. Lu.
851 * Support for fma instruction in AVX on x86-64.
852 Implemented by H.J. Lu and Ulrich Drepper.
854 * AVX support in x86-64 auditing support in ld.so.
855 Implemented by H.J. Lu.
857 * STB_GNU_UNIQUE support added.
858 Implemented by Ulrich Drepper.
860 * Implement second fallback mode for optimized DNS lookup for even more
861 broken environments. If two requests from the same port are not
862 handled correctly close the socket and open a new one before sending
863 the second request. The 'single-request-reopen' option in /etc/resolv.conf
864 can be used to select this mode right away, instead of rediscovering the
865 necessity is every process again.
866 Implemented by Ulrich Drepper.
868 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
869 Implemented by Adam Tkac.
871 * Optimized iconv conversions for S390x.
872 Implemented by Andreas Krebbel.
874 * Using condvars with PI mutexes is now more efficient due to kernel
875 support for requeueing to PI futexes. NPTL support added for x86-64.
876 Implemented by Ulrich Drepper.
878 * New locales: ps_AF, my_MM
882 * The following bugs are resolved with this release:
884 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
885 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
886 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
887 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
888 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
890 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
891 Implemented by Ulrich Drepper.
893 * New Linux interfaces: accept4, fallocate, fallocate64.
894 Implemented by Ulrich Drepper.
896 * Correct declarations of string function when used in C++ code. This
897 could lead to compile errors for invalid C++ code.
899 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
902 * New POSIX 2008 interface: psiginfo
903 Implemented by Ulrich Drepper.
905 * New ISO C++1x interfaces: quick_exit, at_quick_exit
906 Implemented by Ulrich Drepper.
908 * Support for selecting between multiple function definitions at runtime
909 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
911 * The libcrypt library can now use the hash function implementations in
912 NSS. Implemented by Ulrich Drepper.
914 * The malloc implementation can be compiled to be less memory efficient
915 but higher performing in multi-threaded programs.
916 Implemented by Ulrich Drepper.
918 * New locales: nan_TW@latin, ks_IN
920 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
921 Implemented by Ulrich Drepper.
923 * Extended printf hook support. It is possible to use user-defined types
924 and extend existing format specifiers.
925 Implemented by Ulrich Drepper.
927 * Handling for group shadow files has been added.
928 Implemented by Ulrich Drepper.
930 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
931 servers (the case, e.g., for some people using the built-in DNS
932 server in ADSL modems/routers). There is a once-per-process timeout
933 in case of a broken server. To avoid it, users can run nscd or put
934 'options single-request' in /etc/resolv.conf.
935 Implemented by Ulrich Drepper.
939 * The following bugs are resolved with this release:
941 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
942 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
943 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
944 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
945 6968, 6974, 6980, 6995, 7008, 7009, 7029
947 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
948 up at the same time. Implemented by Ulrich Drepper.
950 * TLS descriptors for LD and GD on x86 and x86-64.
951 Implemented by Alexandre Oliva.
953 * getaddrinfo now handles DCCP and UDPlite.
954 Implemented by Ulrich Drepper.
956 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
957 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
958 Implemented by Ulrich Drepper.
960 * New implementation of memmem, strstr, and strcasestr which is O(n).
961 Implemented by Eric Blake.
963 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
965 * Implement "e" option for popen to open file descriptor with the
966 close-on-exec flag set. Implemented by Ulrich Drepper.
968 * Implement "b" mode for fmemopen. In this mode writes writes don't
969 implicitly add a NUL byte and seeks from the end of the buffer really
970 use the buffer end, not the string length as the basis.
971 Implemented by Ulrich Drepper.
973 * Many functions, exported and internal, now atomically set the close-on-exec
974 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
976 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
978 Implemented by Pravin Satpute.
980 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
984 * The following bugs are resolved with this release:
986 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
987 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
988 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
989 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
990 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
991 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
992 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
994 * New locales: bo_CN, bo_IN, shs_CA.
996 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
998 * Sorting rules for some Indian languages (Devanagari and Gujarati).
999 Implemented by Pravin Satpute.
1001 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1003 * nscd caches now all timeouts for DNS entries
1004 Implemented by Ulrich Drepper.
1006 * nscd is more efficient and wakes up less often.
1007 Implemented by Ulrich Drepper.
1009 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1010 vdprintf, and obstack_vprintf.
1011 Implemented by Jakub Jelinek.
1013 * Faster memset for x86-64.
1014 Implemented by Harsha Jagasia and H.J. Lu.
1016 * Faster memcpy on x86.
1017 Implemented by Ulrich Drepper.
1019 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1020 Implemented by Ulrich Drepper.
1022 * Faster sqrt and sqrtf implemention for some PPC variants.
1023 Implemented by Steven Munroe.
1027 * The following bugs are resolved with this release:
1029 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1030 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1031 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1032 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1033 5071, 5103, 5104, 5112, 5113, 5184, 5186
1035 * More checking functions: fread, fread_unlocked, open*, mq_open.
1036 Implemented by Jakub Jelinek and Ulrich Drepper.
1038 * Extend fortification to C++. Implemented by Jakub Jelinek.
1040 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1041 by not recognizing 'a' as a modifier when those specs are requested.
1042 Implemented by Jakub Jelinek.
1044 * PPC optimizations to math and string functions.
1045 Implemented by Steven Munroe.
1047 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1048 options to be passed. Implemented by Ulrich Drepper.
1050 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1052 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1053 Implemented by Ulrich Drepper.
1055 * Handle private futexes in the NPTL implementation.
1056 Implemented by Jakub Jelinek and Ulrich Drepper.
1058 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1059 Implemented by Roland McGrath and Ulrich Drepper.
1061 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1063 * SHA-256 and SHA-512 based password encryption.
1064 Implemented by Ulrich Drepper.
1066 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1067 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1070 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1071 Implemented by Ulrich Drepper.
1075 * The following bugs are resolved with this release:
1077 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1078 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1079 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1080 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1081 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1082 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1083 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1086 * New Linux interfaces: epoll_pwait, sched_getcpu.
1088 * New generic interfaces: strerror_l.
1090 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1094 * The following bugs are resolved with this release:
1096 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1097 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1098 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1099 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1100 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1101 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1102 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1103 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1104 3225, 3251, 3252, 3253, 3273
1106 * For Linux, the sorting of addresses returned by getaddrinfo now also
1107 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1108 Implemented by Ulrich Drepper.
1110 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1111 Implemented by Ulrich Drepper.
1113 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1115 * New iconv module for MIK. Contributed by Alexander Shopov.
1117 * For sites with broken group and/or passwd database, the auto-propagate
1118 option of nscd can prevent creating ID lookup entries from the results
1119 of a name lookup and vice versa. This usually is no problem but some
1120 site might have problems with the default behavior.
1121 Implemented by Ulrich Drepper.
1123 * Iterating over entire database in NIS can be slow. With the
1124 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1125 to trade time for memory. The entire database will be read at once.
1126 Implemented by Ulrich Drepper.
1128 * The interfaces introduced in RFC 3542 have been implemented by
1131 * Support for the new ELF hash table format was added by Ulrich Drepper.
1133 * Support for priority inheritance mutexes added by Jakub Jelinek and
1136 * Support for priority protected mutexes added by Jakub Jelinek.
1138 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1139 or_IN, csb_PL, fy_NL, sr_ME.
1143 * More overflow detection functions.
1145 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1146 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1148 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1149 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1150 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1151 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1152 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1153 by Masahide Washizawa.
1155 * It is now possible to install audit libraries for the dynamic linker using
1156 LD_AUDIT. Implemented by Ulrich Drepper.
1158 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1159 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1160 For a libc and libpthread that works well on Linux 2.4 kernels, we
1161 recommend using the stable 2.3 branch.
1163 * The new function open_wmemstream acts like open_memstream,
1164 but uses a wchar_t wide character buffer.
1166 * The new function ppoll is an improved version of poll, similar to pselect.
1168 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1169 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1170 renameat, unlinkat, linkat, symlinkat, readlinkat.
1172 * New Linux kernel system calls: unshare,
1173 inotify_init, inotify_add_watch, inotify_rm_watch.
1175 * The euidaccess function is now also known by the alias eaccess,
1176 for compatibility with some other systems.
1178 * Timezone data updated to 2006b version.
1182 * The following bugs are resolved with this release:
1184 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1185 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1186 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1187 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1188 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1189 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1191 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1193 * As of this release, GCC 4 can be used to compile the C Library.
1195 * Timezone data updated to 2005m version.
1199 * The following bugs are resolved with this release:
1201 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1202 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1203 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1204 777, 787, 821, 822, 823, 825
1206 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1210 * Support for RFC 3678. Real implementations exist only for Linux so far.
1211 Implemented by Ulrich Drepper.
1213 * nscd can now cache entries persistently. Expiring entries are reloaded.
1214 For speedups the cache can be shared in memory with client processes.
1215 Implemented by Ulrich Drepper.
1217 * nscd can now perform SELinux checks.
1218 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1220 * getaddrinfo queries are now cached. Canonical name lookup is performed
1222 Implemented by Ulrich Drepper.
1224 * The nothrow function attribute is used when headers are used by gcc when
1225 compiling C code. This can avoid significant amounts of exception
1228 * The malloc functions perform more error checking and are stricter when
1229 it comes to reacting on errors. The default action is to terminate
1230 the process after showing an error message. Implemented by Ulrich Drepper.
1232 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1233 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1235 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1236 namespaces using the new function dlmopen(). This feature is of course,
1237 like most other dynamic loading functionality, not available in statically
1238 linked applications. Implemented by Ulrich Drepper.
1240 * Low-overhead boundary checking variants of string and some stdio functions
1241 were added. These are to be used in conjunction with a gcc patch by
1242 Jakub Jelinek which adds calls to these functions if possible.
1243 Implemented by Jakub Jelinek and Ulrich Drepper.
1245 * Old code for several operating systems and machine architectures that
1246 have not been in working condition in a long time have been removed from
1247 the main source tree maintained by the GNU C Library's maintainers.
1248 These files are now reside in the separate `ports' source module
1249 that is usable as an add-on when building the library.
1253 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1254 interrogate the dynamic linker, compatible with the Solaris interface.
1256 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1257 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1259 * getifaddrs now uses the netlink interface on Linux to get its information.
1260 Implemented by Thorsten Kukuk.
1262 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1263 Implemented by Ulrich Drepper.
1265 * support for non-executable stacks on x86 has been added. Changes mostly
1268 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1271 * getaddrinfo now performs destination address selection according to
1276 * Thread-safe interfaces for many functions that access locale data
1277 were added in version 2.3, but these features were omitted from NEWS.
1278 Many functions have variants with an `_l' suffix that take a `locale_t'
1279 object as a parameter rather than consulting the current locale.
1280 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1281 create and maintain `locale_t' objects. Additionally, the new function
1282 `uselocale' sets "the current locale" (as used by functions not so
1283 parameterized) set for an individual thread. These features were added
1284 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1286 * The functions getresuid, getresgid, setresuid, and setresgid, which
1287 have long been available on Linux, are now declared in <unistd.h>
1288 and are now also available on the Hurd.
1290 * ELF thread-local storage support (TLS) now works on x86-64.
1292 * The new dynamic string token $LIB is expanded in shared library names.
1293 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1295 * Aldy Hernandez contributed complete software floating point support for
1296 PowerPC machines with no FPU.
1298 * fexecve is implemented on Linux.
1300 * The `btowc' function should work at least twice as fast due to
1301 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1303 * With approriate thread add-ons cancelable functions are now implemented
1304 in libc.so as well. No need to call the function in libpthread. This
1305 change allowed to finally disable the incorrect and expensive handling
1306 of weak definition in ld.so.
1308 * Yet more PLT entries in libc.so have been removed. We finally arrived
1309 at the bare minimum. Startup times improved appropriately.
1311 * Support for the new Linux/x86 system call interface was added. The
1312 AT_SYSINFO auxiliary vector entry is recognized and handled.
1316 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1319 * iconv (the program and the interface) now accepts empty names (excluding
1320 options like //TRANSLIT) to mean "use charset of current locale".
1322 * localedef can now transliterate characters in strings which are not in
1323 the provided charmap. The information from the input locale is used.
1325 * Prelinking support was added for ELF targets. This requires additional
1326 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1328 * Read-only stdio streams now use mmap to speed up operation by eliminating
1329 copying and buffer underflows. To use add 'm' to the mode string of
1330 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1332 * The malloc functions were completely rewritten by Wolfram Gloger based
1333 on Doug Lea's malloc-2.7.0.c.
1335 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1336 implementation of regex.
1338 * Bruno Haible upgraded the iconv and locale implementation to support
1341 * Contents of the LC_* and LANG environment variables in the CEN style are
1342 not recognized anymore. It never was used. Change by Ulrich Drepper.
1344 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1345 thread-local storage (TLS) ABI on some platforms.
1346 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1348 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1349 EUC-JISX0213, and TSCII.
1351 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1352 BSD-compatible interface for getting all network interface addresses.
1353 Implementation for IPv4 by Roland McGrath.
1355 * Loading of locale data is faster due to the introduction of a locale
1356 archive. Implemented by Roland McGrath and Ulrich Drepper.
1358 * Startup times are significantly reduced by not using exported functions
1359 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1362 * Steven Munroe contributed a port to PowerPC64/Linux.
1366 * The Hurd now uses the GNU libio implementation of stdio rather than the
1367 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1369 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1370 with the same behavior as the Linux system call of the same name.
1374 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1375 128-bit long double format.
1377 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1378 IBM1161, and IBM1162 charsets.
1380 * Andreas Jaeger contributed a port to x86-64/Linux.
1382 * Peter Bruin contributed a port to PowerPC/Hurd.
1384 * libc functions using I/O streams now can handle wide-oriented streams
1387 * optimizations in the dynamic linker. Binaries created by recent binutils
1388 versions start up quicker due to reduced time spent on relocations.
1390 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1394 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1395 asinh, atanh, j0 for the 128-bit long double format.
1397 * Bruno Haible updated all the code handling Unicode in some form to
1398 support Unicode 3.1.
1400 * Speed of regex for single-byte locales is back to previous levels.
1401 Patch by Isamu Hasegawa.
1403 * Alpha, SPARC, and IA-64 now also using floating stacks.
1405 * Startup time of internationalized applications greatly improved through
1406 iconv cache. Use iconvconfig to generate the cache file.
1407 Contributed by Ulrich Drepper.
1409 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1410 severe performance problems. Patch by David Mosberger.
1412 * The Hurd port got a lot more functionality like AIO, various stdio
1413 extensions, etc. Mainly done by Roland McGrath.
1415 * mtrace can now lookup symbols in shared libraries.
1419 * Intel's IA-64 math library is largely integrated. It provides fast and
1420 accurate implementatations for most basic and standard math functions
1421 in float, double, and long double format.
1423 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1424 and asin for the 96-bit long double format and asin, log, tan for the
1425 128-bit long double format.
1427 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1428 The basic double functions exist today. Contributed by Abraham Ziv
1429 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1430 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1432 * An asynchronous name lookup library was added. The interface is designed
1433 after POSIX AIO. The proposal was circulated beforehand to get comments.
1434 No negative ones came in. Implemented by Ulrich Drepper.
1436 * Port to S390/64bit contributed by Martin Schwidefsky
1437 <schwidefsky@de.ibm.com>.
1439 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1440 of functions for Linux/IA-64.
1442 * The RPC code is now thread safe. Threads can now use the same service
1443 of different services at the same time. Patch by Eric Norum
1444 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1446 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1447 family of functions for Linux/S390.
1449 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1450 of functions for Linux/x86.
1452 * Port to Linux/CRIS contributed by Axis Communications.
1456 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1457 we can now check for namespace violations and missing declarations. The
1458 result is that almost all headers are now Unix-compliant (as defined in
1459 the upcoming XPG6). The negative side is that some programs might need
1460 corrections, too, if they depend on the incorrect form of the headers in
1461 previous versions which defined too many symbols and included too many
1464 * regex now handles multibyte character sets correctly.
1465 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1467 * iconv (the program) does now conform to the upcoming XPG6 and handles
1468 charmaps. Instead of the charset names the path of charmaps can be
1469 provided and the conversion happens based on this data.
1470 Contributed by Ulrich Drepper.
1472 * The locale program now provides detailed information about the installed
1477 only lists the names of the supported locales
1481 provides details such as country, language, and codeset name.
1482 Contributed by Ulrich Drepper.
1486 * The gencat program now parses the input file according to the charset
1487 selected by the LC_CTYPE category. This is important for stateful
1488 character sets. To make generating catalogs easier there is a way
1489 to overwrite the charset selected by the locale: before the first
1490 message or $ quote line the catalog can contain a line like
1492 $ codeset=ISO-8859-2
1494 to select the charset (ISO-8859-2 in this case).
1496 Implemented by Shinya Hanataka and Ulrich Drepper.
1498 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1499 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1500 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1502 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1503 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1505 * The LANGUAGE environment variable is now ignored unless the locale is
1506 changed from the default "C" locale.
1508 * The usual bug fixes.
1512 * Greg McGary added runtime support for bounds checking using gcc's
1513 new -fbounded-pointers option. ix86 target is complete. PowerPC
1516 * Thorsten Kukuk added secure mode support to nscd.
1518 * The Berkeley db libraries have been removed.
1520 Related, the nss_db module is now in a separate package since it
1521 obviously requires a database library being available.
1523 * Wide character I/O streams implemented by Ulrich Drepper.
1525 * Functions from the extended socket API added by Ulrich Drepper.
1527 * Functions feenableexcept and fedisableexcept to control the
1528 behaviour of individual exceptions have been added by Andreas Jaeger.
1530 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1532 * The resolver code has been updated from bind 8.2.3-T5B which supports
1533 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1536 This change could in some situations effect backward compatibility. Since
1537 now `_res' is a thread-local instead of a global variable, modifying it
1538 in one thread does not have any effect in other threads.
1540 The resolver library was also extended to allow IPv6 as the transport
1541 protocol for the requests. This work was done by Stig Venaas.
1543 * Compatibility code for K&R C compilers has been removed from the
1544 header files. A ISO C compiler is needed to use the library
1545 (conforming to either C89 or C99 standard).
1547 * Complete rewrite of the localedef program to support multibyte character
1548 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1549 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1550 Implemented by Ulrich Drepper.
1552 Bruno Haible significantly improved the generation and use of the data
1553 structures for the wide character tables.
1555 * Plural handling in gettext implemented by Ulrich Drepper.
1557 * The utmp daemon has been removed.
1559 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1561 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1564 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1566 * POSIX barriers implemented by Kaz Kylheku.
1568 * POSIX spawn function family implemented by Ulrich Drepper.
1570 * POSIX spinlocks are now available.
1572 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1574 * the configure option --enable-kernel=X.Y.Z allows to strip out
1575 compatibility for kernel versions before X.Y.Z. This is currently only
1576 implemented for Linux.
1578 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1579 field sin6_scope_id. This means that all programs using IPv6 should be
1580 recompiled. Don't expect binary compatibility with previous glibc
1583 * various conversion modules for IBM character sets contributed by
1586 * IA-64 port by Jes Sorensen and HJ Lu.
1600 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1602 * New xdr functions are added; some rpc functions are now 64bit clean.
1604 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1606 * Fixed known incompatibilities with glibc 2.0.
1608 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1610 * Optimized a number of functions (especially the ELF dynamic loader).
1612 * Update timezone data files.
1614 * lots of charmaps corrections
1616 * some new locale definitions and charmaps
1621 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1622 conform to POSIX member type requirements. Symbol versions have been
1623 adjusted as needed within the library, and for direct use by applications,
1624 but there is potential for problems if third-party libraries use
1625 struct timeval as part of their interface. This does not present
1626 a problem for X and other "essential" system libraries.
1628 * An additional locale model to support C++ Standard Library locale
1629 model and probably more was implemented by Ulrich Drepper.
1631 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1634 * Miles Bader provided the `argp' function family to support hierachical
1635 command line argument parsing, layered on top of getopt.
1637 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1639 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1642 * scanf recognizes the %a and %A format for scanning floating point numbers.
1644 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1645 information and interfaces for the available integer types.
1647 * about 130 new math functions were added to implement the ISO C9x math
1650 * the new header <complex.h> contains definitions of the complex math
1651 functions from ISO C 9X.
1653 * the new header <tgmath.h> defines generic macros to use complex or
1654 real valued functions.
1656 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1658 * Andreas Jaeger provided a test suite for the math library.
1660 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1662 * Ulrich Drepper added character set conversion functions (iconv).
1664 * Optimized string functions have been added.
1666 * The localedata addon is now part of glibc.
1668 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1670 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1671 daemon for NSS (nscd).
1673 Missing a better place here are some numbers on improvements. Under
1674 Linux 2.1.125 un-tar-ing the kernel sources takes
1678 using local files 12.19s 6.88s 22.91s
1680 using NIS 13.92s 8.91s 26.34s
1682 using NIS & nscd 10.37s 7.34s 25.30s
1684 using NIS+ 27.57s 30.37s 640.46s
1686 using NIS+ & nscd 10.25s 7.83s 26.51s
1688 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1690 Keep in mind that non-namelookup related operations dominate above times.
1691 It was just a common complain that using NIS+ unpacking the kernel is
1694 [1] The old nscd implementation is not available anymore since it was
1695 distributed with glibc up to version 2.0.98 and thus is now replaced.
1697 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1699 * Mark Kettenis provided a Hesiod NSS module.
1701 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1702 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1704 * rcmd can now handle netgroups (Dick Streefland).
1706 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1709 * Support for the IPv6 protocol has been added to the socket API, as per the
1710 latest draft standards.
1712 * Support for Linux 2.2 has been added.
1714 * Interface changes relative to the latest 2.0.x release:
1715 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1716 addseverity NEW: Unix98
1717 alphasort64 NEW: LFS
1718 argp_err_exit_status NEW: argp, GNU ext
1719 argp_error NEW: argp, GNU ext
1720 argp_failure NEW: argp, GNU ext
1721 argp_help NEW: argp, GNU ext
1722 argp_parse NEW: argp, GNU ext
1723 argp_program_bug_address NEW: argp, GNU ext
1724 argp_program_version NEW: argp, GNU ext
1725 argp_program_version_hook NEW: argp, GNU ext
1726 argp_state_help NEW: argp, GNU ext
1727 argp_usage NEW: argp, GNU ext
1728 authdes_create NEW: Secure RPC
1729 authdes_getucred NEW: Secure RPC
1730 authdes_pk_create NEW: Secure RPC
1731 backtrace NEW: GNU ext.
1732 backtrace_symbols NEW: GNU ext.
1733 backtrace_symbols_fd NEW: GNU ext.
1735 cacosf NEW: ISO C 9x
1736 cacosh NEW: ISO C 9x
1737 cacoshf NEW: ISO C 9x
1738 cacoshl NEW: ISO C 9x
1739 cacosl NEW: ISO C 9x
1746 casinf NEW: ISO C 9x
1747 casinh NEW: ISO C 9x
1748 casinhf NEW: ISO C 9x
1749 casinhl NEW: ISO C 9x
1750 casinl NEW: ISO C 9x
1752 catanf NEW: ISO C 9x
1753 catanh NEW: ISO C 9x
1754 catanhf NEW: ISO C 9x
1755 catanhl NEW: ISO C 9x
1756 catanl NEW: ISO C 9x
1757 cbc_crypt NEW: Secure RPC
1761 ccoshf NEW: ISO C 9x
1762 ccoshl NEW: ISO C 9x
1768 cimagf NEW: ISO C 9x
1769 cimagl NEW: ISO C 9x
1770 clearerr_locked REMOVED
1771 clntunix_create NEW: sunrpc ext
1773 clog10 NEW: ISO C 9x
1774 clog10f NEW: ISO C 9x
1775 clog10l NEW: ISO C 9x
1785 cprojf NEW: ISO C 9x
1786 cprojl NEW: ISO C 9x
1788 crealf NEW: ISO C 9x
1789 creall NEW: ISO C 9x
1794 csinhf NEW: ISO C 9x
1795 csinhl NEW: ISO C 9x
1798 csqrtf NEW: ISO C 9x
1799 csqrtl NEW: ISO C 9x
1803 ctanhf NEW: ISO C 9x
1804 ctanhl NEW: ISO C 9x
1806 des_setparity NEW: Secure RPC
1807 ecb_crypt NEW: Secure RPC
1808 endutxent NEW: Unix98
1810 exp10f NEW: ISO C 9x
1811 exp10l NEW: ISO C 9x
1815 fattach NEW: STREAMS
1816 fdetach NEW: STREAMS
1820 feclearexcept NEW: ISO C 9x
1821 fegetenv NEW: ISO C 9x
1822 fegetexceptflag NEW: ISO C 9x
1823 fegetround NEW: ISO C 9x
1824 feholdexcept NEW: ISO C 9x
1826 feraiseexcept NEW: ISO C 9x
1827 ferror_locked REMOVED
1828 fesetenv NEW: ISO C 9x
1829 fesetexceptflag NEW: ISO C 9x
1830 fesetround NEW: ISO C 9x
1831 fetestexcept NEW: ISO C 9x
1832 feupdateenv NEW: ISO C 9x
1833 fflush_locked REMOVED
1837 fgets_unlocked NEW: GNU ext.
1838 fileno_locked REMOVED
1850 fputc_locked REMOVED
1851 fputs_unlocked NEW: GNU ext.
1852 fread_unlocked NEW: GNU ext.
1857 fstatvfs NEW: Unix98
1861 ftruncate64 NEW: LFS
1863 fwrite_unlocked NEW: GNU ext.
1864 gai_strerror NEW: IPv6
1868 getchar_locked REMOVED
1870 getdate_err NEW: Unix98
1871 getdate_r NEW: GNU ext.
1873 getnameinfo NEW: IPv6
1874 getnetname NEW: Secure RPC
1875 getpmsg NEW: STREAMS
1876 getpt NEW: Unix98 PTY
1877 getrlimit64 NEW: LFS
1878 getutxent NEW: Unix98
1879 getutxid NEW: Unix98
1880 getutxline NEW: Unix98
1881 glob64 NEW: GNU ext.
1882 globfree64 NEW: GNU ext.
1883 gnu_get_libc_release NEW: GNU ext.
1884 gnu_get_libc_version NEW: GNU ext.
1885 grantpt NEW: Unix98 PTY
1886 host2netname NEW: Secure RPC
1888 iconv_close NEW: iconv
1889 iconv_open NEW: iconv
1890 if_freenameindex NEW: IPv6
1891 if_indextoname NEW: IPv6
1892 if_nameindex NEW: IPv6
1893 if_nametoindex NEW: IPv6
1894 in6addr_any NEW: IPv6
1895 in6addr_loopback NEW: IPv6
1896 inet6_isipv4mapped NEW: IPv6
1897 isastream NEW: STREAMS
1898 iswblank NEW: GNU ext.
1899 key_decryptsession NEW: Secure RPC
1900 key_decryptsession_pk NEW: Secure RPC
1901 key_encryptsession NEW: Secure RPC
1902 key_encryptsession_pk NEW: Secure RPC
1903 key_gendes NEW: Secure RPC
1904 key_get_conv NEW: Secure RPC
1905 key_secretkey_is_set NEW: Secure RPC
1906 key_setnet NEW: Secure RPC
1907 key_setsecret NEW: Secure RPC
1908 llrint NEW: ISO C 9x
1909 llrintf NEW: ISO C 9x
1910 llrintl NEW: ISO C 9x
1911 llround NEW: ISO C 9x
1912 llroundf NEW: ISO C 9x
1913 llroundl NEW: ISO C 9x
1918 lrintf NEW: ISO C 9x
1919 lrintl NEW: ISO C 9x
1920 lround NEW: ISO C 9x
1921 lroundf NEW: ISO C 9x
1922 lroundl NEW: ISO C 9x
1924 makecontext NEW: Unix98
1925 mempcpy NEW: GNU ext.
1928 modify_ldt NEW: kernel
1932 nearbyint NEW: ISO C 9x
1933 nearbyintf NEW: ISO C 9x
1934 nearbyintl NEW: ISO C 9x
1935 netname2host NEW: Secure RPC
1936 netname2user NEW: Secure RPC
1937 nexttoward NEW: ISO C 9x
1938 nexttowardf NEW: ISO C 9x
1939 nexttowardl NEW: ISO C 9x
1943 passwd2des NEW: Secure RPC
1945 pow10f NEW: GNU ext.
1946 pow10l NEW: GNU ext.
1949 printf_size NEW: GNU ext.
1950 printf_size_info NEW: GNU ext.
1951 profil_counter REMOVED
1952 pthread_mutexattr_getkind_np REPLACED
1953 pthread_mutexattr_setkind_np REPLACED
1954 ptsname NEW: Unix98 PTY
1955 ptsname_r NEW: Unix98 PTY
1957 putchar_locked REMOVED
1958 putgrent NEW: GNU ext.
1960 putpmsg NEW: STREAMS
1961 pututxline NEW: Unix98
1965 readdir64_r NEW: LFS
1966 remquo NEW: ISO C 9x
1967 remquof NEW: ISO C 9x
1968 remquol NEW: ISO C 9x
1970 roundf NEW: ISO C 9x
1971 roundl NEW: ISO C 9x
1973 scalbln NEW: ISO C 9x
1974 scalblnf NEW: ISO C 9x
1975 scalblnl NEW: ISO C 9x
1977 sendfile NEW: kernel
1978 setcontext NEW: Unix98
1979 setrlimit64 NEW: LFS
1980 setutxent NEW: Unix98
1982 sigignore NEW: Unix98
1983 sigqueue NEW: POSIX.1b
1984 sigrelse NEW: Unix98
1985 sigset NEW: POSIX.1b
1986 sigtimedwait NEW: POSIX.1b
1987 sigwaitinfo NEW: POSIX.1b
1988 sincos NEW: GNU ext.
1989 sincosf NEW: GNU ext.
1990 sincosl NEW: GNU ext.
1994 strcasestr NEW: GNU ext.
1995 strtoimax NEW: ISO C 9x
1996 strtoumax NEW: ISO C 9x
1997 strverscmp NEW: GNU ext.
1998 svcauthdes_stats NEW: Secure RPC
1999 svcunix_create NEW: sunrpc etx
2000 svcunixfd_create NEW: sunrpc ext
2001 swapcontext NEW: Unix98
2002 tcgetsid NEW: Unix98 PTY
2003 tdestroy NEW: GNU ext.
2004 tgamma NEW: ISO C 9x
2005 tgammaf NEW: ISO C 9x
2006 tgammal NEW: ISO C 9x
2010 truncf NEW: ISO C 9x
2011 truncl NEW: ISO C 9x
2013 unlockpt NEW: Unix98 PTY
2014 updwtmpx NEW: Unix98
2015 user2netname NEW: Secure RPC
2016 utmpxname NEW: Unix98
2017 versionsort NEW: GNU ext.
2018 versionsort64 NEW: GNU ext.
2020 wcscasecmp NEW: GNU ext.
2021 wcsncasecmp NEW: GNU ext.
2022 wcsnlen NEW: GNU ext.
2023 wcstoimax NEW: ISO C 9x
2024 wcstoll NEW: ISO C 9x
2025 wcstoull NEW: ISO C 9x
2026 wcstoumax NEW: ISO C 9x
2028 wordexp NEW: POSIX.2
2029 wordfree NEW: POSIX.2
2030 write_profiling REMOVED
2031 xdecrypt NEW: Secure RPC
2032 xdr_authdes_cred NEW: Secure RPC
2033 xdr_authdes_verf NEW: Secure RPC
2034 xdr_cryptkeyarg NEW: Secure RPC
2035 xdr_cryptkeyarg2 NEW: Secure RPC
2036 xdr_cryptkeyres NEW: Secure RPC
2037 xdr_getcredres NEW: Secure RPC
2038 xdr_key_netstarg NEW: Secure RPC
2039 xdr_key_netstres NEW: Secure RPC
2040 xdr_keybuf NEW: Secure RPC
2041 xdr_keystatus NEW: Secure RPC
2042 xdr_netnamestr NEW: Secure RPC
2043 xdr_sizeof NEW: Secure RPC
2044 xdr_unixcred NEW: sunrpc ext
2045 xencrypt NEW: Secure RPC
2046 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2057 * inet_ntoa is thread-safe
2059 * updwtmp is moved from libutil to libc
2061 * rewrite of cbrt function
2063 * update of timezone data
2077 * add atoll function
2079 * fix complex problems in Berkeley DB code
2081 * fix math functions
2085 * fixed lots of header problems (especially Linux/GNU specific)
2087 * dynamic loader preserves all registers
2089 * Roland McGrath provided support for handling of auxiliary objects in
2090 the ELF dynamic loader.
2092 * support for parallel builds is improved
2096 * GNU extensions are no longer declared by default. To enable them you
2097 must define the macro `_GNU_SOURCE' in your program or compile with
2100 * The library has changed from using GNU ld symbol aliases to using weak
2101 symbols where available. The ELF object file format supports weak
2102 symbols; GNU ld also supports weak symbols in the a.out format. (There
2103 is also now support for other GNU ld extensions in ELF. Use the
2104 `--with-elf' option to configure to indicate you have ELF, and
2105 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2106 of many files which contained only symbol aliases, reducing the size of
2107 the source and the compiled library; many other files were renamed to
2108 less cryptic names previously occupied by the symbol alias files.
2109 There is a new header file <elf.h> for programs which operate on
2110 files in the ELF format.
2112 * Converted to Autoconf version 2, so `configure' has more options.
2113 Run `configure --help' to see the details.
2115 * The library can now be configured to build profiling, highly-optimized
2116 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2117 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2118 `configure' enable building these extra libraries. The shared library is
2119 built by default when using both ELF and GNU ld. When shared libraries
2120 are enabled, the new library `-ldl' is available for arbitrary run-time
2121 loading of shared objects; its interface is defined in <dlfcn.h>. The
2122 new header file <link.h> gives access to the internals of the run-time
2123 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2124 application of same name on other systems and it provides information
2125 about dynamically linked binaries.
2127 * The C library now provides the run-time support code for profiling
2128 executables compiled with `-pg'. Programs can control the profiling code
2129 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2130 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2131 the support for this file format was contributed by David Mosberger-Tang.
2133 * The math code has been replaced with a math library based on fdlibm from
2134 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2135 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2136 functions. The math functions now reside in a separate library, so
2137 programs using them will need to use `-lm' their linking commands.
2139 * John C. Bowman contributed optimized ix87 assembler inline functions.
2141 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2142 mechanism similar to that found in Solaris 2. This is now used for the
2143 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2144 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2145 file controls what services are used for each individual database. This
2146 works by loading shared libraries with names specified in `nsswitch.conf',
2147 so service modules can be changed or added at any time without even
2148 relinking any program. Currently there are the file, db, and NIS based
2149 NSS services available.
2151 * The new functions `strtoq' and `strtouq' parse integer values from
2152 strings, like `strtol' and `strtoul', but they return `long long int' and
2153 `unsigned long long int' values, respectively (64-bit quantities).
2155 * The new functions `strtof' and `strtold' parse floating-point values from
2156 strings, like `strtod', but they return `float' and `long double' values,
2157 respectively (on some machines `double' and `long double' are the same).
2159 * Ulrich Drepper has contributed new implementations of the floating-point
2160 printing and reading code used in the `printf' family of functions and
2161 `strtod', `strtof', and `strtold'. These new functions are perfectly
2162 accurate, and much faster than the old ones.
2164 * The implementation of the POSIX locale model was completely rewritten by
2165 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2166 to compile the POSIX locale definition.
2168 * The former dummy implementations of the strcoll and strxfrm function are
2169 now replaced by fully functional code contributed by Ulrich Drepper. The
2170 collation information comes from the POSIX locale definitions.
2172 * The new header <langinfo.h> defines an interface for accessing
2173 various locale-dependent data (using the locale chosen with `setlocale').
2175 * Ulrich Drepper has contributed a new suite of functions for operation on
2176 wide-character and multibyte-character strings, in <wchar.h>;
2177 and classification and case conversion of wide characters, in <wctype.h>.
2178 These new functions are conforming to the ISO C, Amendement 1 specification.
2180 * There is now a second implementation of the standard I/O library available.
2181 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2182 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2184 * You can now use positional parameter specifications in format strings
2185 for the `printf' and `scanf' families of functions. For example,
2186 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2187 ``Number 6, Mr Jones''. This is mainly useful when providing different
2188 format strings for different languages, whose grammars may dictate
2189 different orderings of the values being printed. To support this
2190 feature, the interface for `register_printf_handler' has changed; see
2191 the header file <printf.h> for details.
2193 * The `printf' and `scanf' families of functions now understand a new
2194 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2195 to group numbers as indicated by the locale; for `scanf' and friends, this
2196 says to accept as valid only a number with all the proper grouping
2197 separators in the right places. In the default "C" locale, numbers are
2198 not grouped; but locales for specific countries will define the usual
2199 conventions (i.e. separate thousands with `,' in the US locale).
2201 * The pgrp functions have been regularized, slightly incompatibly but much
2202 less confusingly. The core functions are now `getpgid' and `setpgid',
2203 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2204 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2205 provided for compatibility. There is no longer an incompatible `getpgrp'
2206 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2208 * The new header file <fts.h> and suite of functions simplify programs that
2209 operate on directory trees. This code comes from 4.4 BSD.
2211 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2212 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2213 NSS scheme used in glibc.
2215 * There is a new malloc debugging hook `__memalign_hook'.
2217 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2218 `unsigned int' in <sys/types.h>. These are for compatibility only and
2219 their use is discouraged.
2221 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2222 done differently, so that it works even without GNU ld.
2224 * New function `euidaccess' checks allowed access to a file like `access',
2225 but using the effective IDs instead of the real IDs.
2227 * The time zone data files have been updated for the latest and greatest
2228 local time conventions of the countries of the world.
2230 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2233 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2234 for formatting floating-point numbers. They are provided only for
2235 compatibility; new programs should use `sprintf' instead. There are
2236 also equivalent function for the `long double' floating-point type and
2237 all functions also exist in a reentrant form.
2239 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2240 functions for maintaining the login-record files (primarily of use to
2241 system programs such as `login'), and convenient functions for
2242 allocating and initializing a pseudo-terminal (pty) device.
2244 * Ulrich Drepper has contributed new support for System V style
2245 shared memory and IPC on systems that support it.
2247 * Ulrich Drepper has contributed several miscellaneous new functions found
2248 in System V: The `hsearch' family of functions provide an effective
2249 implementation of hash tables; `a64l' and `l64a' provide a very simple
2250 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2253 * Ulrich Drepper has contributed new reentrant counterparts for the
2254 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2256 * Ulrich Drepper has contributed new, highly-optimized versions of several
2257 string functions for the i486/Pentium family of processors.
2259 * Ulrich Drepper has updated the Linux-specific code, based largely
2260 on work done in Hongjiu Lu's version of GNU libc for Linux.
2261 The GNU library now supports Linux versions 2.0.10 and later,
2262 using the ELF object file format (i[3456]86-*-linux).
2264 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2266 * David Mosberger-Tang and Richard Henderson have ported the C library
2267 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2268 dynamic linking support for ELF/Alpha.
2270 * Richard Henderson contributed several Alpha optimized assembler function
2271 for arithmetic and string handling.
2273 * Ulrich Drepper has contributed a new set of message catalog functions to
2274 support multiple languages using the <libintl.h> interface, for use with
2275 his new package GNU gettext. Translation volunteers have contributed
2276 catalogs of the library's messages in Spanish, German, and Korean.
2278 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2279 program and the `catgets' function for reading the catalog files it
2280 creates. (The <libintl.h> interface is preferred; we include the
2281 <nl_types.h> interface using `catgets' only for source compatibility with
2282 programs already written to use it.)
2284 * New header file <values.h> gives SVID-compatible names for <limits.h>
2287 * Various new macros, declarations, and small header files for compatibility
2290 * New function `group_member' is a convenient way to check if a process has
2291 a given effective group ID.
2293 * When using GCC 2.7 and later, the socket functions are now declared in a
2294 special way so that passing an argument of type `struct sockaddr_in *',
2295 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2296 `struct sockaddr *' type, does not generate a type-clash warning.
2298 * New function `error' declared in header file <error.h> is a convenient
2299 function for printing error messages and optionally exiting; this is the
2300 canonical function used in GNU programs. The new functions `err', `warn',
2301 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2302 doing the same thing.
2304 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2305 POSIX.2 `glob' function to do ~ and {...} expansion.
2307 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2308 `clearenv' which is used in POSIX.9 is also available.
2310 * New function `getsid' returns session ID number on systems that support it.
2312 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2313 files <db.h> and <mpool.h> provide a rich set of functions for several
2314 types of simple databases stored in memory and in files, and <ndbm.h> is
2315 an old `ndbm'-compatible interface using the `db' functions. Link with
2316 `-ldb' to get these functions.
2318 * New macro `strdupa' copies a string like `strdup', but uses local stack
2319 space from `alloca' instead of dynamic heap space from `malloc'.
2321 * New function `strnlen' is like `strlen' but searches only a given maximum
2322 number of characters for the null terminator. `stpncpy', `strndup' and
2323 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2326 * New function `statfs' in header <sys/statfs.h>.
2328 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2329 provide convenient functions for operating on blocks of null-terminated
2332 * A new suite of functions in <utmp.h> handle all the details of reading
2333 and writing the utmp file.
2335 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2338 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2339 completely POSIX compliant and also implemented the extended functionality
2340 to handle alternate digit representation and alternate era date formats.
2342 * Ulrich Drepper provided an implementation of the `strptime' function
2343 defined in XPG4.2 which transforms a string into a `struct tm' value.
2345 * Paul Eggert provided the tzselect shell script as part of the timezone
2346 code. The shell script makes it easy to select the correct timezone
2349 * The implementation of the malloc family of functions is completely replaced
2350 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2351 The implementation uses the mmap function (if available) and it is
2352 optimized for the use in multi threaded programs.
2354 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2355 functions. This new functionality is usable by specifying a special
2356 salt string and it is compatible with implementation on *BSD systems.
2358 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2359 `getsubopt' to handle second level command line options, `bsd_signal'
2360 to access BSD style `signal' functionality, the obsolete `regexp' style
2363 * the `lchown' function is available on system which support this
2366 * The implementation of the shadow password handling function was contributed
2369 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2371 * POSIX.1g support was added. The <sys/select.h> header is available,
2372 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2373 implementation of `getaddrinfo'.
2377 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2379 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2380 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2382 * The new function `daemon' from 4.4 BSD is useful for server programs that
2383 want to put themselves in the background.
2385 * Joel Sherrill has contributed support for several standalone boards that
2386 run without an operating system.
2388 * `printf', `scanf' and friends now accept a `q' type modifier for long
2389 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2391 * All of the code taken from BSD (notably most of the math and networking
2392 routines) has been updated from the BSD 4.4-Lite release.
2394 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2396 * The new functions `getdomainname' and `setdomainname' fetch or change the
2397 YP/NIS domain name. These are system calls which exist on systems which
2400 * The time zone data files have been updated for the latest international
2403 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2404 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2408 * The C library now includes support for Sun RPC, from Sun's free
2409 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2410 are included. (There is still no support for YP.)
2412 * Tom Quinn has contributed a port of the C library to SGI machines running
2413 Irix 4 (mips-sgi-irix4).
2415 * The new `lockf' function is a simplified interface to the locking
2416 facilities of `fcntl', included for compatibility.
2418 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2420 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2422 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2425 * The error message printed by `assert' for a failed assertion now includes
2426 the name of the program (if using GNU ld) and the name of the calling
2427 function (with versions of GCC that support this).
2429 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2431 * The library now includes the <sys/mman.h> header file and memory
2432 management functions `mmap', `munmap', `mprotect', `msync', and
2433 `madvise', on systems that support those facilities.
2435 * The interface for `mcheck' has changed slightly: the function called to
2436 abort the program when an allocation inconsistency is detected now takes
2437 an argument that indicates the type of failure. The new function
2438 `mprobe' lets you request a consistency check for a particular block at
2439 any time (checks are normally done only when you call `free' or `realloc'
2442 * It is now possible to easily cross-compile the C library, building on one
2443 system a library to run on another machine and/or operating system. All
2444 you need to do is set the variable `HOST_CC' in `configparms' to the
2445 native compiler for programs to run on the machine you are building on (a
2446 few generator programs are used on Unix systems); set `CC' to the
2449 * The new function `fexecve' (only implemented on the GNU system) executes
2450 a program file given a file descriptor already open on the file.
2454 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2455 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2457 * You can set the variable `libprefix' in `configparms' to specify a prefix
2458 to be prepended to installed library files; this makes it easy to install
2459 the GNU C library to be linked as `-lgnuc' or whatever.
2461 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2462 copies a limited number of characters from a string, and returns the
2463 address of the last character written.
2465 * You no longer need to check for whether the installed `stddef.h' is
2466 compatible with the GNU C library. configure now checks for you.
2468 * You can now define a per-stream `fileno' function to convert the
2469 stream's cookie into an integral file descriptor.
2471 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2472 allocates zero bytes of storage, and returns a unique pointer which
2473 you can pass to `realloc' or `free'. The behavior is undefined if
2474 you dereference this pointer.
2476 * The C library now runs on Sony NEWS m68k machines running either
2477 NewsOS 3 or NewsOS 4.
2479 * The new `syscall' function is a system-dependent primitive function
2480 for invoking system calls. It has the canonical behavior on Unix
2481 systems, including unreliable return values for some calls (such as
2482 `pipe', `fork' and `getppid').
2484 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2485 to `EAGAIN', which is the preferred name. On systems whose kernels
2486 use two distinct codes, the C library now translates EWOULDBLOCK to
2487 EAGAIN in every system call function.
2491 * The GNU C Library Reference Manual is now distributed with the library.
2492 `make dvi' will produce a DVI file of the printed manual.
2493 `make info' will produce Info files that you can read on line using C-h i
2494 in Emacs or the `info' program.
2495 Please send comments on the manual to bug-glibc-manual@gnu.org.
2497 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2499 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2501 * Jason Merrill has contributed a port to the Sequent Symmetry running
2502 Dynix version 3 (i386-sequent-dynix).
2504 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2505 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2507 * New function `memory_warnings' lets you arrange to get warnings when
2508 malloc is running out of memory to allocate, like Emacs gives you.
2510 * The C library now contains the relocating allocator used in Emacs 19 for
2511 its editing buffers. This allocator (ralloc) minimizes allocation
2512 overhead and fragmentation by moving allocated regions around whenever it
2513 needs to. You always refer to a ralloc'd region with a "handle" (a
2514 pointer to a pointer--an object of type `void **').
2516 * There is a new `printf' format: `%m' gives you the string corresponding
2517 to the error code in `errno'.
2519 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2520 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2521 pass, the `a' modifier says to fill in a `char **' you pass with a
2524 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2525 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2526 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2528 * `mkstemp' is a traditional Unix function to atomically create and open a
2529 uniquely-named temporary file.
2533 * The standard location for the file that says what the local timezone is
2534 has changed again. It is now `/usr/local/etc/localtime' (or more
2535 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2537 * The distribution no longer contains any files with names longer than 14
2540 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2541 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2543 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2547 * The configuration process has changed quite a bit. The `configure'
2548 script is now used just like the configuration scripts for other GNU
2549 packages. The `sysdeps' directory hierarchy is much rearranged.
2550 The file `INSTALL' explains the new scheme in detail.
2552 * The header files no longer need to be processed into ANSI C and
2553 traditional C versions. There is just one set of files to install, and
2554 it will work with ANSI or old C compilers (including `gcc -traditional').
2556 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2557 MIPS DECStation running Ultrix 4.
2559 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2560 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2561 made itself into a shared library.
2563 * Yet further improved support for the i386, running 4.3 BSD-like systems
2564 (such as Mach 3 with the Unix single-server), or System V.
2566 * New function `strncasecmp' to do case-insensitive string comparison
2567 with limited length.
2569 * New function `strsep' is a reentrant alternative to `strtok'.
2571 * New functions `scandir' and `alphasort' for searching directories.
2573 * New function `setenv' is a better interface to `putenv'.
2575 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2576 function for traversing a directory tree.
2578 * The GNU obstack package is now also part of the C library.
2579 The new function `open_obstack_stream' creates a stdio stream that
2580 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2581 formatted output directly to an obstack.
2583 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2584 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2586 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2588 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2589 things to your strings.
2591 * There are some new test programs: test-fseek, testmb, and testrand.
2593 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2594 These ports are not finished, but are a good starting place for really
2595 supporting those systems.
2597 * `/etc/localtime' is now the standard location for the file that says what
2598 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2599 This follows the general principle that `/etc' is the place for all local
2600 configuration files.
2602 * The C library header files now use `extern "C"' when used by the C++
2603 compiler, so the C library should now work with C++ code.
2605 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2606 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2609 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2610 function which uses the `merge sort' algorithm, and is said to be
2611 significantly faster than the old GNU `qsort' function. Merge sort is
2612 now the standard `qsort' function. The new algorithm can require a lot
2613 of temporary storage; so, the old sorting function is called when the
2614 required storage is not available.
2616 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2617 provides the Unix `crypt' function, plus some other entry points.
2619 * The code and header files taken from 4.4 BSD have been updated with the
2620 latest files released from Berkeley.
2622 ----------------------------------------------------------------------
2623 Copyright information:
2625 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2627 Permission is granted to anyone to make or distribute verbatim copies
2628 of this document as received, in any medium, provided that the
2629 copyright notice and this permission notice are preserved,
2630 thus giving the recipient permission to redistribute in turn.
2632 Permission is granted to distribute modified versions
2633 of this document, or of portions of it,
2634 under the above conditions, provided also that they
2635 carry prominent notices stating who last changed them.
2638 version-control: never