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, 6792, 13064, 14094, 14841, 14906, 15319, 15467, 15790, 15969, 16351,
13 16512, 16560, 16783, 16850, 17090, 17195, 17269, 17523, 17542, 17569,
14 17588, 17596, 17620, 17621, 17628, 17631, 17711, 17715, 17776, 17779,
15 17792, 17836, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
16 17967, 17969, 17978, 17987, 17991, 17996, 17998, 17999, 18019, 18020,
17 18029, 18030, 18032, 18036, 18038, 18039, 18042, 18043, 18046, 18047,
18 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18128, 18138, 18185,
19 18197, 18206, 18210, 18211, 18247, 18287.
21 * Cache information can be queried via sysconf() function on s390 e.g. with
22 _SC_LEVEL1_ICACHE_SIZE as argument.
24 * A buffer overflow in gethostbyname_r and related functions performing DNS
25 requests has been fixed. If the NSS functions were called with a
26 misaligned buffer, the buffer length change due to pointer alignment was
27 not taken into account. This could result in application crashes or,
28 potentially arbitrary code execution, using crafted, but syntactically
29 valid DNS responses. (CVE-2015-1781)
31 * The time zone file parser has been made more robust against crafted time
32 zone files, avoiding heap buffer overflows related to the processing of
33 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
34 large time zone data files. Overly long time zone specifiers in the TZ
35 variable no longer result in stack overflows and crashes.
37 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
38 for LD and GD on x86 and x86-64, has been implemented. You will need
39 binutils-2.24 or later to enable this optimization.
41 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
42 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
43 Hat). These updates cause user visible changes, such as the fix for bug
49 * The following bugs are resolved with this release:
51 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
52 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
53 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
54 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
55 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
56 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
57 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
58 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
59 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
60 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
63 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
64 too little memory for the to-be-scanned arguments and overflow the
65 allocated buffer. The implementation now correctly computes the required
66 buffer size when using malloc, and switches to malloc from alloca as
69 * A new semaphore algorithm has been implemented in generic C code for all
70 machines. Previous custom assembly implementations of semaphore were
71 difficult to reason about or ensure that they were safe. The new version
72 of semaphore supports machines with 64-bit or 32-bit atomic operations.
73 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
74 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
76 * Port to Altera Nios II has been contributed by Mentor Graphics.
78 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
79 implementations for powerpc64/powerpc64le.
80 Implemented by Adhemerval Zanella (IBM).
82 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
83 and powerpc64le. This may improve lock scaling of existing programs on
84 HTM capable systems. The lock elision code is only enabled with
85 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
86 powerpc will issue a transaction abort on every syscall to avoid side
87 effects being visible outside transactions.
89 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
90 AArch64. Contributed by ARM Ltd.
92 * i386 memcpy functions optimized with SSE2 unaligned load/store.
94 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
95 under certain input conditions resulting in the execution of a shell for
96 command substitution when the application did not request it. The
97 implementation now checks WRDE_NOCMD immediately before executing the
98 shell and returns the error WRDE_CMDSUB as expected.
100 * CVE-2012-3406 printf-style functions could run into a stack overflow when
101 processing format strings with a large number of format specifiers.
103 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
104 infinite loop if the DNS response contained a PTR record of an unexpected
107 * The minimum GCC version that can be used to build this version of the GNU
108 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
109 still be used to compile programs using the GNU C Library.
111 * The GNU C Library is now built with -Werror by default. This can be
112 disabled by configuring with --disable-werror.
114 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
116 * The obsolete sigvec function has been removed. This was the original
117 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
118 programs have been using instead for about 25 years. Of course, ABI
119 compatibility for old binaries using sigvec remains intact.
121 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
122 with newer versions of bison.
124 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
125 The original MIPS o32 hard-float ABI requires an FPU where double-precision
126 registers overlay two consecutive single-precision registers. MIPS32R2
127 introduced a new FPU mode (FR=1) where double-precision registers extend the
128 corresponding single-precision registers which is incompatible with the
129 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
130 require the use of FR=1 making a transition necessary. New o32 ABI
131 extensions enable users to migrate over time from the original o32 ABI
132 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
133 tracks the ABI of any loaded object and verifies that new objects are
134 compatible. Mode transitions will also be requested as required and
135 unsupportable objects will be rejected. The ABI checks include both soft and
136 hard float ABIs for o32, n32 and n64.
138 GCC 5 with GNU binutils 2.25 onwards:
139 It is strongly recommended that all o32 system libraries are built using the
140 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
141 with the original and all new o32 ABI extensions. Configure a MIPS GCC
142 compiler using --with-fp-32=xx to set this by default.
146 * The following bugs are resolved with this release:
148 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
149 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
150 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
151 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
152 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
153 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
154 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
155 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
156 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
157 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
158 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
159 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
160 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
161 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
162 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
164 * Reverted change of ABI data structures for s390 and s390x:
165 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
166 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
167 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
168 are preserved pointing straight to the same implementation as the old ones.
169 Given that, new callers will simply provide a too-big buffer to these
170 functions. Any applications/libraries out there that embed jmp_buf or
171 ucontext_t in an ABI-relevant data structure that have already been rebuilt
172 against 2.19 headers will have to rebuilt again. This is necessary in any
173 case to revert the breakage in their ABI caused by the glibc change.
175 * Support for file description locks is added to systems running the
176 Linux kernel. The standard file locking interfaces are extended to
177 operate on file descriptions, not file descriptors, via the use of
178 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
179 are associated with an open file instead of a process.
181 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
183 * The minimum Linux kernel version that this version of the GNU C Library
184 can be used with is 2.6.32.
186 * Running the testsuite no longer terminates as soon as a test fails.
187 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
188 with PASS or FAIL lines for individual tests. A summary of the results is
189 printed, including a list of failing lists, and "make check" exits with
190 error status if there were any unexpected failures. "make check
191 stop-on-test-failure=y" may be used to keep the old behavior.
193 * The am33 port, which had not worked for several years, has been removed
196 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
197 supported; they now act the same as _DEFAULT_SOURCE (but generate a
198 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
199 conflicted with POSIX (support for which was removed in 2.19), the
200 interfaces those macros enabled remain available when compiling with
201 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
204 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
206 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
207 This may improve lock scaling of existing programs on TX capable systems.
208 The lock elision code is only built with --enable-lock-elision=yes and
209 then requires a GCC version supporting the TX builtins. With lock elision
210 default mutexes are elided via __builtin_tbegin, if the cpu supports
211 transactions. By default lock elision is not enabled and the elision code
214 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
215 copy the path argument. This allowed programs to cause posix_spawn to
216 deference a dangling pointer, or use an unexpected pathname argument if
217 the string was modified after the posix_spawn_file_actions_addopen
220 * All supported architectures now use the main glibc sysdeps directory
221 instead of some being in a separate "ports" directory (which was
222 distributed separately before glibc 2.17).
224 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
225 On configurations that support it (all Linux configurations), it's now
226 used regardless of the --enable-add-ons switch to configure. It is no
227 longer possible to build such configurations without pthreads support.
229 * Locale names, including those obtained from environment variables (LANG
230 and the LC_* variables), are more tightly checked for proper syntax.
231 setlocale will now fail (with EINVAL) for locale names that are overly
232 long, contain slashes without starting with a slash, or contain ".." path
233 components. (CVE-2014-0475) Previously, some valid locale names were
234 silently replaced with the "C" locale when running in AT_SECURE mode
235 (e.g., in a SUID program). This is no longer necessary because of the
238 * On x86-64, the dynamic linker's lazy-binding support is now compatible
239 with application code using Intel MPX instructions. (With all previous
240 versions, the MPX register state could be clobbered when making calls
241 into or out of a shared library.) Note that while the new dynamic
242 linker is compatible with all known x86 hardware whether or not it
243 supports Intel MPX, some x86 instruction-set emulators might fail to
244 handle the new instruction encodings. This is known to affect Valgrind
245 versions up through 3.9 (but will be fixed in the forthcoming 3.10
246 release), and might affect other tools that do instruction emulation.
248 * Support for loadable gconv transliteration modules has been removed.
249 The support for transliteration modules has been non-functional for
250 over a decade, and the removal is prompted by security defects. The
251 normal gconv conversion modules are still supported. Transliteration
252 with //TRANSLIT is still possible, and the //IGNORE specifier
253 continues to be supported. (CVE-2014-5119)
255 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
256 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
257 resulting a denial-of-service security vulnerability in applications which
258 use functions related to iconv. (CVE-2014-6040)
262 * The following bugs are resolved with this release:
264 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
265 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
266 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
267 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
268 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
269 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
270 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
271 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
272 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
273 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
274 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
275 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
276 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
277 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
278 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
279 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
280 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
281 16431, 16453, 16474, 16506, 16510, 16529
283 * Slovenian translations for glibc messages have been contributed by the
284 Translation Project's Slovenian team of translators.
286 * The public headers no longer use __unused nor __block. This change is to
287 support compiling programs that are derived from BSD sources and use
288 __unused internally, and to support compiling with Clang's -fblock
289 extension which uses __block.
291 * CVE-2012-4412 The strcoll implementation caches indices and rules for
292 large collation sequences to optimize multiple passes. This cache
293 computation may overflow for large collation sequences and may cause a
294 stack or buffer overflow. This is now fixed to use a slower algorithm
295 which does not use a cache if there is an integer overflow.
297 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
298 rules for large collation sequences to optimize multiple passes and falls
299 back to alloca if malloc fails, resulting in a possible stack overflow.
300 The implementation now falls back to an uncached collation sequence lookup
303 * CVE-2013-4788 The pointer guard used for pointer mangling was not
304 initialized for static applications resulting in the security feature
305 being disabled. The pointer guard is now correctly initialized to a
306 random value for static applications. Existing static applications need
307 to be recompiled to take advantage of the fix (bug 15754).
309 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
310 to the d_name member of struct dirent, or omit the terminating NUL
311 character. (Bugzilla #14699).
313 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
314 aligned_alloc functions could allocate too few bytes or corrupt the
315 heap when passed very large allocation size values (Bugzilla #15855,
318 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
319 for AF_INET6 has been fixed (Bugzilla #16072).
321 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
322 pap_CW, quz_PE, the_NP.
324 * Substantially revised locales: gd_GB, ht_HT
326 * The LC_ADDRESS field was updated to support country_car for almost all
329 * ISO 1427 definitions were updated.
331 * ISO 3166 definitions were updated.
333 * The localedef utility now supports --big-endian and --little-endian
334 command-line options to generate locales for a different system from that
335 for which the C library was built.
337 * Binary locale files now only depend on the endianness of the system for
338 which they are generated and not on other properties of that system. As a
339 consequence, binary files generated with new localedef may be incompatible
340 with old versions of the GNU C Library, and binary files generated with
341 old localedef may be incompatible with this version of the GNU C Library,
342 in the following circumstances:
344 + Locale files may be incompatible on m68k systems.
346 + Locale archive files (but not separate files for individual locales) may
347 be incompatible on systems where plain "char" is signed.
349 * The configure option --disable-versioning has been removed. Builds with
350 --disable-versioning had not worked for several years.
352 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
353 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
355 * SystemTap probes for malloc have been introduced.
357 * SystemTap probes for slow multiple precision fallback paths of
358 transcendental functions have been introduced.
360 * Support for powerpc64le has been added.
362 * The soft-float powerpc port now supports e500 processors.
364 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
366 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
367 set of header declarations that are enabled by default, even when other
368 feature test macros or compiler options such as -std=c99 would otherwise
369 disable some of those declarations.
371 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
372 conflict with POSIX. The libbsd-compat library (which was a dummy library
373 that did nothing) has also been removed.
375 * Preliminary documentation about Multi-Thread, Async-Signal and
376 Async-Cancel Safety has been added.
378 * Change of ABI data structures for s390 and s390x:
379 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
380 allow for future hardware extensions. All library functions that accept or
381 return these structures were versioned in order to provide backwards
382 compatibility with existing code. However, not all cases can be handled
383 with interface versioning. If an application embeds either structure into
384 another structure and that structure is passed to another compilation unit
385 which expects the newer larger-sized object then any access to the new
386 fields will result in undefined behaviour. Similarly any access to fields
387 that were moved by the enlarging of the structures will cause undefined
388 behaviour. To fix the undefined behaviour all objects that are part of the
389 final in-memory image must agree on the size of structures, and this may
390 require recompilation.
394 * The following bugs are resolved with this release:
396 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
397 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
398 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
399 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
400 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
401 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
402 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
403 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
404 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
405 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
406 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
407 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
408 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
411 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
412 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
413 Distributions can re-enable building and using pt_chown via the new configure
414 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
415 considerable security risks and should only be used if the distribution
416 understands and accepts the risks.
418 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
421 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
422 fixed (Bugzilla #15330).
424 * Add support for calling C++11 thread_local object destructors on thread
425 and program exit. This needs compiler support for offloading C++11
426 destructor calls to glibc.
428 * Improved worst case performance of libm functions with double inputs and
431 * Support for priority inherited mutexes in pthread condition variables on
432 non-x86 architectures.
434 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
436 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
438 * Optimized string functions for ARM. Implemented by Will Newton and
441 * Optimized libm functions for SPARC. Implemented by David S. Miller.
443 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
446 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
447 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
449 * Added a benchmark framework to track performance of functions in glibc.
451 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
452 It is based on draft TS 18661 and currently enabled as a GNU extension.
454 * On Linux, the clock function now uses the clock_gettime system call
455 for improved precision, rather than old times system call.
457 * Added support for version-3 tz format files. This is needed when using
458 the tz database release 2013e or later, and affects a few unusual cases --
459 currently only TZ='America/Godthab' for time stamps after 2037.
461 * Added new API functions pthread_getattr_default_np and
462 pthread_setattr_default_np to get and set the default pthread
463 attributes of a process.
465 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
466 This may improve lock scaling of existing programs on TSX capable systems.
467 When the --enable-lock-elision=yes parameter is specified at configure
468 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
471 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
472 availability). Implemented by Ryan S. Arnold.
474 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
478 * The following bugs are resolved with this release:
480 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
481 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
482 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
483 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
484 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
485 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
486 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
487 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
488 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
489 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
490 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
491 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
492 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
493 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
494 14879, 14889, 14893, 14898, 14914.
496 * Optimization of memcpy for MIPS.
498 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
499 EMFILE has been fixed (Bugzilla #14889).
501 * The add-on ports collection is now distributed in the "ports" subdirectory
502 of the main GNU C Library distribution, rather than separately.
504 * Port to ARM AArch64 contributed by Linaro.
506 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
507 Optimized versions of memcpy, memset, and memcmp added for System z10 and
509 Implemented by Andreas Krebbel.
511 * The new function secure_getenv allows secure access to the environment,
512 returning NULL if running in a SUID/SGID process. This function replaces
513 the internal function __secure_getenv.
515 * SystemTap static probes have been added into the dynamic linker.
516 Implemented by Gary Benson.
518 * Optimizations of string functions strstr, strcasestr and memmem.
519 Implemented by Maxim Kuvyrkov.
521 * The minimum Linux kernel version that this version of the GNU C Library
522 can be used with is 2.6.16.
524 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
525 powerpc POWER7. Implemented by Will Schmidt.
527 * New configure option --disable-nscd builds the C library such that it
528 never attempts to contact the Name Service Caching Daemon (nscd).
529 New configure option --disable-build-nscd avoids building nscd itself;
530 this is the default if --disable-nscd is used.
532 * Improved support for cross-compilation, including cross-testing and
533 bootstrap builds without a previously built glibc.
535 * Several testsuite tests are now able to test multiple IFUNC variants of an
536 interface, rather than just testing the one that would be chooen by
539 * New configure options --with-bugurl and --with-pkgversion, for
540 distributors to use to embed their bug-reporting and package version
541 information in --help and --version output.
543 * The ttyname and ttyname_r functions on Linux now fall back to searching for
544 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
545 allows creation of chroots without the procfs mounted on /proc.
547 * The `crypt' function now fails if passed salt bytes that violate the
548 specification for those values. On Linux, the `crypt' function will
549 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
550 enabled, and fail on encrypted strings using the MD5 or DES algorithm
551 when the mode is enabled.
553 * The `clock_*' suite of functions (declared in <time.h>) is now available
554 directly in the main C library. Previously it was necessary to link with
555 -lrt to use these functions. This change has the effect that a
556 single-threaded program that uses a function such as `clock_gettime' (and
557 is not linked with -lrt) will no longer implicitly load the pthreads
558 library at runtime and so will not suffer the overheads associated with
559 multi-thread support in other code such as the C++ runtime library.
561 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
566 * The following bugs are resolved with this release:
568 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
569 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
570 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
571 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
572 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
573 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
574 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
575 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
576 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
577 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
578 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
579 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
580 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
581 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
582 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
583 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
584 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
585 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
586 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
587 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
588 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
589 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
592 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
593 configuring glibc with:
594 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
595 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
596 Implemented by H.J. Lu.
600 + define static_assert
602 + do not declare gets
604 + declare at_quick_exit and quick_exit also for ISO C11
606 + aligned_alloc. NB: The code is deliberately allows the size parameter
607 to not be a multiple of the alignment. This is a moronic requirement
608 in the standard but it is only a requirement on the caller, not the
613 + uchar.h support added
615 + CMPLX, CMPLXF, CMPLXL added
617 Implemented by Ulrich Drepper.
619 * Support for the IA-64 has been moved to ports.
621 * Remove support for anything but ELF binary format
623 * Checking versions of poll, ppoll added.
624 Implemented by Ulrich Drepper.
626 * More generic and 64-bit performance optimizations to math functions.
627 Implemented by Ulrich Drepper.
629 * New configure option --enable-obsolete-rpc makes the deprecated RPC
630 headers and functions available at compile time as they were before
631 version 2.14. This option will be removed at some time in the future
632 after the TI-RPC library becomes fully sufficient for the needs of
633 existing applications.
635 * Compatibility code for Linux kernel versions before 2.4 has been removed.
636 Note that glibc is not expected to work with any Linux kernel version
639 * New header <sys/auxv.h> and function getauxval allowing easy access to
640 the AT_* key-value pairs passed from the Linux kernel. The header also
641 defines the HWCAP_* bits associated with the AT_HWCAP key.
643 * New locales: mag_IN
645 * New configure option --enable-systemtap builds SystemTap static probes
646 into libc for setjmp and longjmp and into libpthread for various operations.
647 So far the setjmp/longjmp probes and some of the libpthread probes are
648 provided only for i*86 and x86_64.
649 Implemented by Roland McGrath and Rayson Ho.
651 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
653 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
656 * More optimized functions for SPARC. Implemented by David S. Miller.
658 * Improved support for cross-compilation, especially bootstrap builds
659 without a previously built glibc.
661 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
662 Chris Metcalf from Tilera.
664 * Support for the old ARM ABI has been removed from ports. Only the EABI is
665 now supported for ARM processors.
667 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
668 as the name of the dynamic linker, to distinguish it from the
669 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
671 * Support for CRIS has been removed from ports.
673 * A new class of installed header has been documented for low-level
674 platform-specific functionality. PowerPC added the first instance with a
675 function to provide time base register access. Contributed by Tulio
676 Magno Quites Machado Filho.
678 * ix86 configurations now install header files that are consistent with
679 what x86-64 configurations install. These same header files can be used
680 for -m32, -m64, or -mx32 builds.
681 Contributed by H.J. Lu.
683 * Math library bug fixes. A thorough audit of all open math library bugs was
684 conducted by Joseph Myers. Significant progress was made on many math
685 library bugs resulting in more accurate exceptions and function results.
686 Many thanks to all those that contributed including Andreas Jaeger for his
687 patch review and work on the x87 trigonometric instruction issues.
689 * Timezone data is no longer installed. Timezone-related binaries and scripts
690 will continue to be installed. Users should obtain their timezone data from
691 their distribution provider or from the tzdata package at
692 <ftp://munnari.oz.au/pub/>.
696 * The following bugs are resolved with this release:
698 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
699 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
700 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
701 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
702 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
703 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
704 13484, 13506, 13515, 13523, 13524, 13538, 13540
706 * New program pldd to list loaded object of a process
707 Implemented by Ulrich Drepper.
709 * Add nss_db support back to glibc. No more dependency on Berkeley db
710 and support for initgroups lookups.
711 Implemented by Ulrich Drepper.
713 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
714 Contributed by HJ Lu.
716 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
717 Contributed by HJ Lu.
719 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
720 on x86-32 and x86-64.
721 Contributed by Liubov Dmitrieva.
723 * Optimized strchr and strrchr for SSE on x86-32.
724 Contributed by Liubov Dmitrieva.
726 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
727 for x86-64 and x86-32.
728 Contributed by Liubov Dmitrieva.
730 * New interfaces: scandirat, scandirat64
731 Implemented by Ulrich Drepper.
733 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
734 Implemented by Ulrich Drepper.
736 * nscd now also caches the netgroup database.
737 Implemented by Ulrich Drepper.
739 * Integrate libm with gcc's -ffinite-math-only option.
740 Implemented by Ulrich Drepper.
742 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
743 to math functions. Implemented by Ulrich Drepper.
745 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
746 Implemented by Ulrich Drepper.
748 * New Linux interfaces: process_vm_readv, process_vm_writev
750 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
751 Implemented by Ulrich Drepper.
753 * Optimized nearbyint and strcasecmp for PPC.
754 Implemented by Adhemerval Zanella.
756 * New locales: bho_IN, unm_US, es_CU, ta_LK
760 * The following bugs are resolved with this release:
762 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
763 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
764 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
765 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
766 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
767 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
768 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
769 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
770 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
771 12795, 12811, 12813, 12814, 12841
773 * The RPC implementation in libc is obsoleted. Old programs keep working
774 but new programs cannot be linked with the routines in libc anymore.
775 Programs in need of RPC functionality must be linked against TI-RPC.
776 The TI-RPC implementation is IPv6 enabled and there are other benefits.
778 Visible changes of this change include (obviously) the inability to link
779 programs using RPC functions without referencing the TI-RPC library and the
780 removal of the RPC headers from the glibc headers.
781 Implemented by Ulrich Drepper.
783 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
784 syncfs, setns, sendmmsg
786 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
787 yue_HK, lij_IT, mhr_RU
789 * New encodings: CP770, CP771, CP772, CP773, CP774
791 * New program sotruss to trace calls through PLTs
792 Implemented by Ulrich Drepper.
794 * The malloc hook implementation is marked deprecated and will be removed
795 from the default implementation in the next version. The design never
796 worked ever since the introduction of threads. Even programs which do
797 not create threads themselves can use multiple threads created internally.
801 * The following bugs are resolved with this release:
803 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
804 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
805 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
806 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
809 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
811 * POWER7 optimizations: memset, memcmp, strncmp
813 * New optimized string functions for x86-64: strnlen (SSE2),
814 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
815 Implemented by Ulrich Drepper.
819 * The following bugs are resolved with this release:
821 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
822 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
823 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
824 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
825 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
826 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
827 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
828 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
830 * New interfaces: pthread_getname_np, pthread_setname_np
832 * New Linux interface: recvmmsg
834 * STT_GNU_IFUNC implemented for Sparc by David Miller.
836 * The dynamic linker now recognizes supported ABI versions from the
837 EI_ABIVERSION field in the ELF header.
838 Implemented by Ulrich Drepper.
840 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
841 will not be used to fill in password fields in the passwd.byname replies.
842 Instead it is used to synthesize the shadow.byname table, should it be
843 missing. This is a useful mode in some installations involving Solaris.
844 Implemented by Ulrich Drepper.
846 * New locales: kok_IN, sq_MK, cv_RU
850 * The following bugs are resolved with this release:
852 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
853 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
854 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
855 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
856 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
857 10789, 10817, 10823, 10840, 10847
859 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
861 Implemented by Ulrich Drepper.
863 * Checking version of longjmp added that fails if an uninitialized stack
864 frame would be created. Implemented by Ulrich Drepper.
866 * STT_GNU_IFUNC is now supported in static executables.
867 Implemented by H.J. Lu.
869 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
871 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
872 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
873 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
874 Contributed by H.J. Lu.
876 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
877 Implemented by Ulrich Drepper.
879 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
881 Contributed by H.J. Lu.
883 * Support for fma instruction in AVX on x86-64.
884 Implemented by H.J. Lu and Ulrich Drepper.
886 * AVX support in x86-64 auditing support in ld.so.
887 Implemented by H.J. Lu.
889 * STB_GNU_UNIQUE support added.
890 Implemented by Ulrich Drepper.
892 * Implement second fallback mode for optimized DNS lookup for even more
893 broken environments. If two requests from the same port are not
894 handled correctly close the socket and open a new one before sending
895 the second request. The 'single-request-reopen' option in /etc/resolv.conf
896 can be used to select this mode right away, instead of rediscovering the
897 necessity is every process again.
898 Implemented by Ulrich Drepper.
900 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
901 Implemented by Adam Tkac.
903 * Optimized iconv conversions for S390x.
904 Implemented by Andreas Krebbel.
906 * Using condvars with PI mutexes is now more efficient due to kernel
907 support for requeueing to PI futexes. NPTL support added for x86-64.
908 Implemented by Ulrich Drepper.
910 * New locales: ps_AF, my_MM
914 * The following bugs are resolved with this release:
916 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
917 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
918 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
919 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
920 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
922 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
923 Implemented by Ulrich Drepper.
925 * New Linux interfaces: accept4, fallocate, fallocate64.
926 Implemented by Ulrich Drepper.
928 * Correct declarations of string function when used in C++ code. This
929 could lead to compile errors for invalid C++ code.
931 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
934 * New POSIX 2008 interface: psiginfo
935 Implemented by Ulrich Drepper.
937 * New ISO C++1x interfaces: quick_exit, at_quick_exit
938 Implemented by Ulrich Drepper.
940 * Support for selecting between multiple function definitions at runtime
941 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
943 * The libcrypt library can now use the hash function implementations in
944 NSS. Implemented by Ulrich Drepper.
946 * The malloc implementation can be compiled to be less memory efficient
947 but higher performing in multi-threaded programs.
948 Implemented by Ulrich Drepper.
950 * New locales: nan_TW@latin, ks_IN
952 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
953 Implemented by Ulrich Drepper.
955 * Extended printf hook support. It is possible to use user-defined types
956 and extend existing format specifiers.
957 Implemented by Ulrich Drepper.
959 * Handling for group shadow files has been added.
960 Implemented by Ulrich Drepper.
962 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
963 servers (the case, e.g., for some people using the built-in DNS
964 server in ADSL modems/routers). There is a once-per-process timeout
965 in case of a broken server. To avoid it, users can run nscd or put
966 'options single-request' in /etc/resolv.conf.
967 Implemented by Ulrich Drepper.
971 * The following bugs are resolved with this release:
973 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
974 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
975 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
976 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
977 6968, 6974, 6980, 6995, 7008, 7009, 7029
979 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
980 up at the same time. Implemented by Ulrich Drepper.
982 * TLS descriptors for LD and GD on x86 and x86-64.
983 Implemented by Alexandre Oliva.
985 * getaddrinfo now handles DCCP and UDPlite.
986 Implemented by Ulrich Drepper.
988 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
989 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
990 Implemented by Ulrich Drepper.
992 * New implementation of memmem, strstr, and strcasestr which is O(n).
993 Implemented by Eric Blake.
995 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
997 * Implement "e" option for popen to open file descriptor with the
998 close-on-exec flag set. Implemented by Ulrich Drepper.
1000 * Implement "b" mode for fmemopen. In this mode writes writes don't
1001 implicitly add a NUL byte and seeks from the end of the buffer really
1002 use the buffer end, not the string length as the basis.
1003 Implemented by Ulrich Drepper.
1005 * Many functions, exported and internal, now atomically set the close-on-exec
1006 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1008 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1010 Implemented by Pravin Satpute.
1012 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1016 * The following bugs are resolved with this release:
1018 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1019 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1020 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1021 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1022 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1023 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1024 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1026 * New locales: bo_CN, bo_IN, shs_CA.
1028 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1030 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1031 Implemented by Pravin Satpute.
1033 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1035 * nscd caches now all timeouts for DNS entries
1036 Implemented by Ulrich Drepper.
1038 * nscd is more efficient and wakes up less often.
1039 Implemented by Ulrich Drepper.
1041 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1042 vdprintf, and obstack_vprintf.
1043 Implemented by Jakub Jelinek.
1045 * Faster memset for x86-64.
1046 Implemented by Harsha Jagasia and H.J. Lu.
1048 * Faster memcpy on x86.
1049 Implemented by Ulrich Drepper.
1051 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1052 Implemented by Ulrich Drepper.
1054 * Faster sqrt and sqrtf implemention for some PPC variants.
1055 Implemented by Steven Munroe.
1059 * The following bugs are resolved with this release:
1061 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1062 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1063 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1064 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1065 5071, 5103, 5104, 5112, 5113, 5184, 5186
1067 * More checking functions: fread, fread_unlocked, open*, mq_open.
1068 Implemented by Jakub Jelinek and Ulrich Drepper.
1070 * Extend fortification to C++. Implemented by Jakub Jelinek.
1072 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1073 by not recognizing 'a' as a modifier when those specs are requested.
1074 Implemented by Jakub Jelinek.
1076 * PPC optimizations to math and string functions.
1077 Implemented by Steven Munroe.
1079 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1080 options to be passed. Implemented by Ulrich Drepper.
1082 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1084 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1085 Implemented by Ulrich Drepper.
1087 * Handle private futexes in the NPTL implementation.
1088 Implemented by Jakub Jelinek and Ulrich Drepper.
1090 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1091 Implemented by Roland McGrath and Ulrich Drepper.
1093 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1095 * SHA-256 and SHA-512 based password encryption.
1096 Implemented by Ulrich Drepper.
1098 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1099 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1102 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1103 Implemented by Ulrich Drepper.
1107 * The following bugs are resolved with this release:
1109 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1110 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1111 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1112 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1113 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1114 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1115 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1118 * New Linux interfaces: epoll_pwait, sched_getcpu.
1120 * New generic interfaces: strerror_l.
1122 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1126 * The following bugs are resolved with this release:
1128 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1129 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1130 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1131 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1132 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1133 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1134 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1135 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1136 3225, 3251, 3252, 3253, 3273
1138 * For Linux, the sorting of addresses returned by getaddrinfo now also
1139 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1140 Implemented by Ulrich Drepper.
1142 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1143 Implemented by Ulrich Drepper.
1145 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1147 * New iconv module for MIK. Contributed by Alexander Shopov.
1149 * For sites with broken group and/or passwd database, the auto-propagate
1150 option of nscd can prevent creating ID lookup entries from the results
1151 of a name lookup and vice versa. This usually is no problem but some
1152 site might have problems with the default behavior.
1153 Implemented by Ulrich Drepper.
1155 * Iterating over entire database in NIS can be slow. With the
1156 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1157 to trade time for memory. The entire database will be read at once.
1158 Implemented by Ulrich Drepper.
1160 * The interfaces introduced in RFC 3542 have been implemented by
1163 * Support for the new ELF hash table format was added by Ulrich Drepper.
1165 * Support for priority inheritance mutexes added by Jakub Jelinek and
1168 * Support for priority protected mutexes added by Jakub Jelinek.
1170 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1171 or_IN, csb_PL, fy_NL, sr_ME.
1175 * More overflow detection functions.
1177 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1178 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1180 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1181 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1182 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1183 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1184 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1185 by Masahide Washizawa.
1187 * It is now possible to install audit libraries for the dynamic linker using
1188 LD_AUDIT. Implemented by Ulrich Drepper.
1190 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1191 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1192 For a libc and libpthread that works well on Linux 2.4 kernels, we
1193 recommend using the stable 2.3 branch.
1195 * The new function open_wmemstream acts like open_memstream,
1196 but uses a wchar_t wide character buffer.
1198 * The new function ppoll is an improved version of poll, similar to pselect.
1200 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1201 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1202 renameat, unlinkat, linkat, symlinkat, readlinkat.
1204 * New Linux kernel system calls: unshare,
1205 inotify_init, inotify_add_watch, inotify_rm_watch.
1207 * The euidaccess function is now also known by the alias eaccess,
1208 for compatibility with some other systems.
1210 * Timezone data updated to 2006b version.
1214 * The following bugs are resolved with this release:
1216 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1217 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1218 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1219 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1220 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1221 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1223 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1225 * As of this release, GCC 4 can be used to compile the C Library.
1227 * Timezone data updated to 2005m version.
1231 * The following bugs are resolved with this release:
1233 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1234 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1235 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1236 777, 787, 821, 822, 823, 825
1238 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1242 * Support for RFC 3678. Real implementations exist only for Linux so far.
1243 Implemented by Ulrich Drepper.
1245 * nscd can now cache entries persistently. Expiring entries are reloaded.
1246 For speedups the cache can be shared in memory with client processes.
1247 Implemented by Ulrich Drepper.
1249 * nscd can now perform SELinux checks.
1250 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1252 * getaddrinfo queries are now cached. Canonical name lookup is performed
1254 Implemented by Ulrich Drepper.
1256 * The nothrow function attribute is used when headers are used by gcc when
1257 compiling C code. This can avoid significant amounts of exception
1260 * The malloc functions perform more error checking and are stricter when
1261 it comes to reacting on errors. The default action is to terminate
1262 the process after showing an error message. Implemented by Ulrich Drepper.
1264 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1265 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1267 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1268 namespaces using the new function dlmopen(). This feature is of course,
1269 like most other dynamic loading functionality, not available in statically
1270 linked applications. Implemented by Ulrich Drepper.
1272 * Low-overhead boundary checking variants of string and some stdio functions
1273 were added. These are to be used in conjunction with a gcc patch by
1274 Jakub Jelinek which adds calls to these functions if possible.
1275 Implemented by Jakub Jelinek and Ulrich Drepper.
1277 * Old code for several operating systems and machine architectures that
1278 have not been in working condition in a long time have been removed from
1279 the main source tree maintained by the GNU C Library's maintainers.
1280 These files are now reside in the separate `ports' source module
1281 that is usable as an add-on when building the library.
1285 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1286 interrogate the dynamic linker, compatible with the Solaris interface.
1288 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1289 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1291 * getifaddrs now uses the netlink interface on Linux to get its information.
1292 Implemented by Thorsten Kukuk.
1294 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1295 Implemented by Ulrich Drepper.
1297 * support for non-executable stacks on x86 has been added. Changes mostly
1300 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1303 * getaddrinfo now performs destination address selection according to
1308 * Thread-safe interfaces for many functions that access locale data
1309 were added in version 2.3, but these features were omitted from NEWS.
1310 Many functions have variants with an `_l' suffix that take a `locale_t'
1311 object as a parameter rather than consulting the current locale.
1312 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1313 create and maintain `locale_t' objects. Additionally, the new function
1314 `uselocale' sets "the current locale" (as used by functions not so
1315 parameterized) set for an individual thread. These features were added
1316 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1318 * The functions getresuid, getresgid, setresuid, and setresgid, which
1319 have long been available on Linux, are now declared in <unistd.h>
1320 and are now also available on the Hurd.
1322 * ELF thread-local storage support (TLS) now works on x86-64.
1324 * The new dynamic string token $LIB is expanded in shared library names.
1325 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1327 * Aldy Hernandez contributed complete software floating point support for
1328 PowerPC machines with no FPU.
1330 * fexecve is implemented on Linux.
1332 * The `btowc' function should work at least twice as fast due to
1333 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1335 * With approriate thread add-ons cancelable functions are now implemented
1336 in libc.so as well. No need to call the function in libpthread. This
1337 change allowed to finally disable the incorrect and expensive handling
1338 of weak definition in ld.so.
1340 * Yet more PLT entries in libc.so have been removed. We finally arrived
1341 at the bare minimum. Startup times improved appropriately.
1343 * Support for the new Linux/x86 system call interface was added. The
1344 AT_SYSINFO auxiliary vector entry is recognized and handled.
1348 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1351 * iconv (the program and the interface) now accepts empty names (excluding
1352 options like //TRANSLIT) to mean "use charset of current locale".
1354 * localedef can now transliterate characters in strings which are not in
1355 the provided charmap. The information from the input locale is used.
1357 * Prelinking support was added for ELF targets. This requires additional
1358 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1360 * Read-only stdio streams now use mmap to speed up operation by eliminating
1361 copying and buffer underflows. To use add 'm' to the mode string of
1362 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1364 * The malloc functions were completely rewritten by Wolfram Gloger based
1365 on Doug Lea's malloc-2.7.0.c.
1367 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1368 implementation of regex.
1370 * Bruno Haible upgraded the iconv and locale implementation to support
1373 * Contents of the LC_* and LANG environment variables in the CEN style are
1374 not recognized anymore. It never was used. Change by Ulrich Drepper.
1376 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1377 thread-local storage (TLS) ABI on some platforms.
1378 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1380 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1381 EUC-JISX0213, and TSCII.
1383 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1384 BSD-compatible interface for getting all network interface addresses.
1385 Implementation for IPv4 by Roland McGrath.
1387 * Loading of locale data is faster due to the introduction of a locale
1388 archive. Implemented by Roland McGrath and Ulrich Drepper.
1390 * Startup times are significantly reduced by not using exported functions
1391 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1394 * Steven Munroe contributed a port to PowerPC64/Linux.
1398 * The Hurd now uses the GNU libio implementation of stdio rather than the
1399 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1401 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1402 with the same behavior as the Linux system call of the same name.
1406 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1407 128-bit long double format.
1409 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1410 IBM1161, and IBM1162 charsets.
1412 * Andreas Jaeger contributed a port to x86-64/Linux.
1414 * Peter Bruin contributed a port to PowerPC/Hurd.
1416 * libc functions using I/O streams now can handle wide-oriented streams
1419 * optimizations in the dynamic linker. Binaries created by recent binutils
1420 versions start up quicker due to reduced time spent on relocations.
1422 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1426 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1427 asinh, atanh, j0 for the 128-bit long double format.
1429 * Bruno Haible updated all the code handling Unicode in some form to
1430 support Unicode 3.1.
1432 * Speed of regex for single-byte locales is back to previous levels.
1433 Patch by Isamu Hasegawa.
1435 * Alpha, SPARC, and IA-64 now also using floating stacks.
1437 * Startup time of internationalized applications greatly improved through
1438 iconv cache. Use iconvconfig to generate the cache file.
1439 Contributed by Ulrich Drepper.
1441 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1442 severe performance problems. Patch by David Mosberger.
1444 * The Hurd port got a lot more functionality like AIO, various stdio
1445 extensions, etc. Mainly done by Roland McGrath.
1447 * mtrace can now lookup symbols in shared libraries.
1451 * Intel's IA-64 math library is largely integrated. It provides fast and
1452 accurate implementatations for most basic and standard math functions
1453 in float, double, and long double format.
1455 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1456 and asin for the 96-bit long double format and asin, log, tan for the
1457 128-bit long double format.
1459 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1460 The basic double functions exist today. Contributed by Abraham Ziv
1461 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1462 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1464 * An asynchronous name lookup library was added. The interface is designed
1465 after POSIX AIO. The proposal was circulated beforehand to get comments.
1466 No negative ones came in. Implemented by Ulrich Drepper.
1468 * Port to S390/64bit contributed by Martin Schwidefsky
1469 <schwidefsky@de.ibm.com>.
1471 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1472 of functions for Linux/IA-64.
1474 * The RPC code is now thread safe. Threads can now use the same service
1475 of different services at the same time. Patch by Eric Norum
1476 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1478 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1479 family of functions for Linux/S390.
1481 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1482 of functions for Linux/x86.
1484 * Port to Linux/CRIS contributed by Axis Communications.
1488 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1489 we can now check for namespace violations and missing declarations. The
1490 result is that almost all headers are now Unix-compliant (as defined in
1491 the upcoming XPG6). The negative side is that some programs might need
1492 corrections, too, if they depend on the incorrect form of the headers in
1493 previous versions which defined too many symbols and included too many
1496 * regex now handles multibyte character sets correctly.
1497 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1499 * iconv (the program) does now conform to the upcoming XPG6 and handles
1500 charmaps. Instead of the charset names the path of charmaps can be
1501 provided and the conversion happens based on this data.
1502 Contributed by Ulrich Drepper.
1504 * The locale program now provides detailed information about the installed
1509 only lists the names of the supported locales
1513 provides details such as country, language, and codeset name.
1514 Contributed by Ulrich Drepper.
1518 * The gencat program now parses the input file according to the charset
1519 selected by the LC_CTYPE category. This is important for stateful
1520 character sets. To make generating catalogs easier there is a way
1521 to overwrite the charset selected by the locale: before the first
1522 message or $ quote line the catalog can contain a line like
1524 $ codeset=ISO-8859-2
1526 to select the charset (ISO-8859-2 in this case).
1528 Implemented by Shinya Hanataka and Ulrich Drepper.
1530 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1531 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1532 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1534 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1535 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1537 * The LANGUAGE environment variable is now ignored unless the locale is
1538 changed from the default "C" locale.
1540 * The usual bug fixes.
1544 * Greg McGary added runtime support for bounds checking using gcc's
1545 new -fbounded-pointers option. ix86 target is complete. PowerPC
1548 * Thorsten Kukuk added secure mode support to nscd.
1550 * The Berkeley db libraries have been removed.
1552 Related, the nss_db module is now in a separate package since it
1553 obviously requires a database library being available.
1555 * Wide character I/O streams implemented by Ulrich Drepper.
1557 * Functions from the extended socket API added by Ulrich Drepper.
1559 * Functions feenableexcept and fedisableexcept to control the
1560 behaviour of individual exceptions have been added by Andreas Jaeger.
1562 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1564 * The resolver code has been updated from bind 8.2.3-T5B which supports
1565 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1568 This change could in some situations effect backward compatibility. Since
1569 now `_res' is a thread-local instead of a global variable, modifying it
1570 in one thread does not have any effect in other threads.
1572 The resolver library was also extended to allow IPv6 as the transport
1573 protocol for the requests. This work was done by Stig Venaas.
1575 * Compatibility code for K&R C compilers has been removed from the
1576 header files. A ISO C compiler is needed to use the library
1577 (conforming to either C89 or C99 standard).
1579 * Complete rewrite of the localedef program to support multibyte character
1580 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1581 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1582 Implemented by Ulrich Drepper.
1584 Bruno Haible significantly improved the generation and use of the data
1585 structures for the wide character tables.
1587 * Plural handling in gettext implemented by Ulrich Drepper.
1589 * The utmp daemon has been removed.
1591 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1593 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1596 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1598 * POSIX barriers implemented by Kaz Kylheku.
1600 * POSIX spawn function family implemented by Ulrich Drepper.
1602 * POSIX spinlocks are now available.
1604 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1606 * the configure option --enable-kernel=X.Y.Z allows to strip out
1607 compatibility for kernel versions before X.Y.Z. This is currently only
1608 implemented for Linux.
1610 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1611 field sin6_scope_id. This means that all programs using IPv6 should be
1612 recompiled. Don't expect binary compatibility with previous glibc
1615 * various conversion modules for IBM character sets contributed by
1618 * IA-64 port by Jes Sorensen and HJ Lu.
1632 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1634 * New xdr functions are added; some rpc functions are now 64bit clean.
1636 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1638 * Fixed known incompatibilities with glibc 2.0.
1640 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1642 * Optimized a number of functions (especially the ELF dynamic loader).
1644 * Update timezone data files.
1646 * lots of charmaps corrections
1648 * some new locale definitions and charmaps
1653 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1654 conform to POSIX member type requirements. Symbol versions have been
1655 adjusted as needed within the library, and for direct use by applications,
1656 but there is potential for problems if third-party libraries use
1657 struct timeval as part of their interface. This does not present
1658 a problem for X and other "essential" system libraries.
1660 * An additional locale model to support C++ Standard Library locale
1661 model and probably more was implemented by Ulrich Drepper.
1663 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1666 * Miles Bader provided the `argp' function family to support hierachical
1667 command line argument parsing, layered on top of getopt.
1669 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1671 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1674 * scanf recognizes the %a and %A format for scanning floating point numbers.
1676 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1677 information and interfaces for the available integer types.
1679 * about 130 new math functions were added to implement the ISO C9x math
1682 * the new header <complex.h> contains definitions of the complex math
1683 functions from ISO C 9X.
1685 * the new header <tgmath.h> defines generic macros to use complex or
1686 real valued functions.
1688 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1690 * Andreas Jaeger provided a test suite for the math library.
1692 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1694 * Ulrich Drepper added character set conversion functions (iconv).
1696 * Optimized string functions have been added.
1698 * The localedata addon is now part of glibc.
1700 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1702 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1703 daemon for NSS (nscd).
1705 Missing a better place here are some numbers on improvements. Under
1706 Linux 2.1.125 un-tar-ing the kernel sources takes
1710 using local files 12.19s 6.88s 22.91s
1712 using NIS 13.92s 8.91s 26.34s
1714 using NIS & nscd 10.37s 7.34s 25.30s
1716 using NIS+ 27.57s 30.37s 640.46s
1718 using NIS+ & nscd 10.25s 7.83s 26.51s
1720 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1722 Keep in mind that non-namelookup related operations dominate above times.
1723 It was just a common complain that using NIS+ unpacking the kernel is
1726 [1] The old nscd implementation is not available anymore since it was
1727 distributed with glibc up to version 2.0.98 and thus is now replaced.
1729 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1731 * Mark Kettenis provided a Hesiod NSS module.
1733 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1734 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1736 * rcmd can now handle netgroups (Dick Streefland).
1738 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1741 * Support for the IPv6 protocol has been added to the socket API, as per the
1742 latest draft standards.
1744 * Support for Linux 2.2 has been added.
1746 * Interface changes relative to the latest 2.0.x release:
1747 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1748 addseverity NEW: Unix98
1749 alphasort64 NEW: LFS
1750 argp_err_exit_status NEW: argp, GNU ext
1751 argp_error NEW: argp, GNU ext
1752 argp_failure NEW: argp, GNU ext
1753 argp_help NEW: argp, GNU ext
1754 argp_parse NEW: argp, GNU ext
1755 argp_program_bug_address NEW: argp, GNU ext
1756 argp_program_version NEW: argp, GNU ext
1757 argp_program_version_hook NEW: argp, GNU ext
1758 argp_state_help NEW: argp, GNU ext
1759 argp_usage NEW: argp, GNU ext
1760 authdes_create NEW: Secure RPC
1761 authdes_getucred NEW: Secure RPC
1762 authdes_pk_create NEW: Secure RPC
1763 backtrace NEW: GNU ext.
1764 backtrace_symbols NEW: GNU ext.
1765 backtrace_symbols_fd NEW: GNU ext.
1767 cacosf NEW: ISO C 9x
1768 cacosh NEW: ISO C 9x
1769 cacoshf NEW: ISO C 9x
1770 cacoshl NEW: ISO C 9x
1771 cacosl NEW: ISO C 9x
1778 casinf NEW: ISO C 9x
1779 casinh NEW: ISO C 9x
1780 casinhf NEW: ISO C 9x
1781 casinhl NEW: ISO C 9x
1782 casinl NEW: ISO C 9x
1784 catanf NEW: ISO C 9x
1785 catanh NEW: ISO C 9x
1786 catanhf NEW: ISO C 9x
1787 catanhl NEW: ISO C 9x
1788 catanl NEW: ISO C 9x
1789 cbc_crypt NEW: Secure RPC
1793 ccoshf NEW: ISO C 9x
1794 ccoshl NEW: ISO C 9x
1800 cimagf NEW: ISO C 9x
1801 cimagl NEW: ISO C 9x
1802 clearerr_locked REMOVED
1803 clntunix_create NEW: sunrpc ext
1805 clog10 NEW: ISO C 9x
1806 clog10f NEW: ISO C 9x
1807 clog10l NEW: ISO C 9x
1817 cprojf NEW: ISO C 9x
1818 cprojl NEW: ISO C 9x
1820 crealf NEW: ISO C 9x
1821 creall NEW: ISO C 9x
1826 csinhf NEW: ISO C 9x
1827 csinhl NEW: ISO C 9x
1830 csqrtf NEW: ISO C 9x
1831 csqrtl NEW: ISO C 9x
1835 ctanhf NEW: ISO C 9x
1836 ctanhl NEW: ISO C 9x
1838 des_setparity NEW: Secure RPC
1839 ecb_crypt NEW: Secure RPC
1840 endutxent NEW: Unix98
1842 exp10f NEW: ISO C 9x
1843 exp10l NEW: ISO C 9x
1847 fattach NEW: STREAMS
1848 fdetach NEW: STREAMS
1852 feclearexcept NEW: ISO C 9x
1853 fegetenv NEW: ISO C 9x
1854 fegetexceptflag NEW: ISO C 9x
1855 fegetround NEW: ISO C 9x
1856 feholdexcept NEW: ISO C 9x
1858 feraiseexcept NEW: ISO C 9x
1859 ferror_locked REMOVED
1860 fesetenv NEW: ISO C 9x
1861 fesetexceptflag NEW: ISO C 9x
1862 fesetround NEW: ISO C 9x
1863 fetestexcept NEW: ISO C 9x
1864 feupdateenv NEW: ISO C 9x
1865 fflush_locked REMOVED
1869 fgets_unlocked NEW: GNU ext.
1870 fileno_locked REMOVED
1882 fputc_locked REMOVED
1883 fputs_unlocked NEW: GNU ext.
1884 fread_unlocked NEW: GNU ext.
1889 fstatvfs NEW: Unix98
1893 ftruncate64 NEW: LFS
1895 fwrite_unlocked NEW: GNU ext.
1896 gai_strerror NEW: IPv6
1900 getchar_locked REMOVED
1902 getdate_err NEW: Unix98
1903 getdate_r NEW: GNU ext.
1905 getnameinfo NEW: IPv6
1906 getnetname NEW: Secure RPC
1907 getpmsg NEW: STREAMS
1908 getpt NEW: Unix98 PTY
1909 getrlimit64 NEW: LFS
1910 getutxent NEW: Unix98
1911 getutxid NEW: Unix98
1912 getutxline NEW: Unix98
1913 glob64 NEW: GNU ext.
1914 globfree64 NEW: GNU ext.
1915 gnu_get_libc_release NEW: GNU ext.
1916 gnu_get_libc_version NEW: GNU ext.
1917 grantpt NEW: Unix98 PTY
1918 host2netname NEW: Secure RPC
1920 iconv_close NEW: iconv
1921 iconv_open NEW: iconv
1922 if_freenameindex NEW: IPv6
1923 if_indextoname NEW: IPv6
1924 if_nameindex NEW: IPv6
1925 if_nametoindex NEW: IPv6
1926 in6addr_any NEW: IPv6
1927 in6addr_loopback NEW: IPv6
1928 inet6_isipv4mapped NEW: IPv6
1929 isastream NEW: STREAMS
1930 iswblank NEW: GNU ext.
1931 key_decryptsession NEW: Secure RPC
1932 key_decryptsession_pk NEW: Secure RPC
1933 key_encryptsession NEW: Secure RPC
1934 key_encryptsession_pk NEW: Secure RPC
1935 key_gendes NEW: Secure RPC
1936 key_get_conv NEW: Secure RPC
1937 key_secretkey_is_set NEW: Secure RPC
1938 key_setnet NEW: Secure RPC
1939 key_setsecret NEW: Secure RPC
1940 llrint NEW: ISO C 9x
1941 llrintf NEW: ISO C 9x
1942 llrintl NEW: ISO C 9x
1943 llround NEW: ISO C 9x
1944 llroundf NEW: ISO C 9x
1945 llroundl NEW: ISO C 9x
1950 lrintf NEW: ISO C 9x
1951 lrintl NEW: ISO C 9x
1952 lround NEW: ISO C 9x
1953 lroundf NEW: ISO C 9x
1954 lroundl NEW: ISO C 9x
1956 makecontext NEW: Unix98
1957 mempcpy NEW: GNU ext.
1960 modify_ldt NEW: kernel
1964 nearbyint NEW: ISO C 9x
1965 nearbyintf NEW: ISO C 9x
1966 nearbyintl NEW: ISO C 9x
1967 netname2host NEW: Secure RPC
1968 netname2user NEW: Secure RPC
1969 nexttoward NEW: ISO C 9x
1970 nexttowardf NEW: ISO C 9x
1971 nexttowardl NEW: ISO C 9x
1975 passwd2des NEW: Secure RPC
1977 pow10f NEW: GNU ext.
1978 pow10l NEW: GNU ext.
1981 printf_size NEW: GNU ext.
1982 printf_size_info NEW: GNU ext.
1983 profil_counter REMOVED
1984 pthread_mutexattr_getkind_np REPLACED
1985 pthread_mutexattr_setkind_np REPLACED
1986 ptsname NEW: Unix98 PTY
1987 ptsname_r NEW: Unix98 PTY
1989 putchar_locked REMOVED
1990 putgrent NEW: GNU ext.
1992 putpmsg NEW: STREAMS
1993 pututxline NEW: Unix98
1997 readdir64_r NEW: LFS
1998 remquo NEW: ISO C 9x
1999 remquof NEW: ISO C 9x
2000 remquol NEW: ISO C 9x
2002 roundf NEW: ISO C 9x
2003 roundl NEW: ISO C 9x
2005 scalbln NEW: ISO C 9x
2006 scalblnf NEW: ISO C 9x
2007 scalblnl NEW: ISO C 9x
2009 sendfile NEW: kernel
2010 setcontext NEW: Unix98
2011 setrlimit64 NEW: LFS
2012 setutxent NEW: Unix98
2014 sigignore NEW: Unix98
2015 sigqueue NEW: POSIX.1b
2016 sigrelse NEW: Unix98
2017 sigset NEW: POSIX.1b
2018 sigtimedwait NEW: POSIX.1b
2019 sigwaitinfo NEW: POSIX.1b
2020 sincos NEW: GNU ext.
2021 sincosf NEW: GNU ext.
2022 sincosl NEW: GNU ext.
2026 strcasestr NEW: GNU ext.
2027 strtoimax NEW: ISO C 9x
2028 strtoumax NEW: ISO C 9x
2029 strverscmp NEW: GNU ext.
2030 svcauthdes_stats NEW: Secure RPC
2031 svcunix_create NEW: sunrpc etx
2032 svcunixfd_create NEW: sunrpc ext
2033 swapcontext NEW: Unix98
2034 tcgetsid NEW: Unix98 PTY
2035 tdestroy NEW: GNU ext.
2036 tgamma NEW: ISO C 9x
2037 tgammaf NEW: ISO C 9x
2038 tgammal NEW: ISO C 9x
2042 truncf NEW: ISO C 9x
2043 truncl NEW: ISO C 9x
2045 unlockpt NEW: Unix98 PTY
2046 updwtmpx NEW: Unix98
2047 user2netname NEW: Secure RPC
2048 utmpxname NEW: Unix98
2049 versionsort NEW: GNU ext.
2050 versionsort64 NEW: GNU ext.
2052 wcscasecmp NEW: GNU ext.
2053 wcsncasecmp NEW: GNU ext.
2054 wcsnlen NEW: GNU ext.
2055 wcstoimax NEW: ISO C 9x
2056 wcstoll NEW: ISO C 9x
2057 wcstoull NEW: ISO C 9x
2058 wcstoumax NEW: ISO C 9x
2060 wordexp NEW: POSIX.2
2061 wordfree NEW: POSIX.2
2062 write_profiling REMOVED
2063 xdecrypt NEW: Secure RPC
2064 xdr_authdes_cred NEW: Secure RPC
2065 xdr_authdes_verf NEW: Secure RPC
2066 xdr_cryptkeyarg NEW: Secure RPC
2067 xdr_cryptkeyarg2 NEW: Secure RPC
2068 xdr_cryptkeyres NEW: Secure RPC
2069 xdr_getcredres NEW: Secure RPC
2070 xdr_key_netstarg NEW: Secure RPC
2071 xdr_key_netstres NEW: Secure RPC
2072 xdr_keybuf NEW: Secure RPC
2073 xdr_keystatus NEW: Secure RPC
2074 xdr_netnamestr NEW: Secure RPC
2075 xdr_sizeof NEW: Secure RPC
2076 xdr_unixcred NEW: sunrpc ext
2077 xencrypt NEW: Secure RPC
2078 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2089 * inet_ntoa is thread-safe
2091 * updwtmp is moved from libutil to libc
2093 * rewrite of cbrt function
2095 * update of timezone data
2109 * add atoll function
2111 * fix complex problems in Berkeley DB code
2113 * fix math functions
2117 * fixed lots of header problems (especially Linux/GNU specific)
2119 * dynamic loader preserves all registers
2121 * Roland McGrath provided support for handling of auxiliary objects in
2122 the ELF dynamic loader.
2124 * support for parallel builds is improved
2128 * GNU extensions are no longer declared by default. To enable them you
2129 must define the macro `_GNU_SOURCE' in your program or compile with
2132 * The library has changed from using GNU ld symbol aliases to using weak
2133 symbols where available. The ELF object file format supports weak
2134 symbols; GNU ld also supports weak symbols in the a.out format. (There
2135 is also now support for other GNU ld extensions in ELF. Use the
2136 `--with-elf' option to configure to indicate you have ELF, and
2137 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2138 of many files which contained only symbol aliases, reducing the size of
2139 the source and the compiled library; many other files were renamed to
2140 less cryptic names previously occupied by the symbol alias files.
2141 There is a new header file <elf.h> for programs which operate on
2142 files in the ELF format.
2144 * Converted to Autoconf version 2, so `configure' has more options.
2145 Run `configure --help' to see the details.
2147 * The library can now be configured to build profiling, highly-optimized
2148 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2149 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2150 `configure' enable building these extra libraries. The shared library is
2151 built by default when using both ELF and GNU ld. When shared libraries
2152 are enabled, the new library `-ldl' is available for arbitrary run-time
2153 loading of shared objects; its interface is defined in <dlfcn.h>. The
2154 new header file <link.h> gives access to the internals of the run-time
2155 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2156 application of same name on other systems and it provides information
2157 about dynamically linked binaries.
2159 * The C library now provides the run-time support code for profiling
2160 executables compiled with `-pg'. Programs can control the profiling code
2161 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2162 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2163 the support for this file format was contributed by David Mosberger-Tang.
2165 * The math code has been replaced with a math library based on fdlibm from
2166 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2167 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2168 functions. The math functions now reside in a separate library, so
2169 programs using them will need to use `-lm' their linking commands.
2171 * John C. Bowman contributed optimized ix87 assembler inline functions.
2173 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2174 mechanism similar to that found in Solaris 2. This is now used for the
2175 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2176 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2177 file controls what services are used for each individual database. This
2178 works by loading shared libraries with names specified in `nsswitch.conf',
2179 so service modules can be changed or added at any time without even
2180 relinking any program. Currently there are the file, db, and NIS based
2181 NSS services available.
2183 * The new functions `strtoq' and `strtouq' parse integer values from
2184 strings, like `strtol' and `strtoul', but they return `long long int' and
2185 `unsigned long long int' values, respectively (64-bit quantities).
2187 * The new functions `strtof' and `strtold' parse floating-point values from
2188 strings, like `strtod', but they return `float' and `long double' values,
2189 respectively (on some machines `double' and `long double' are the same).
2191 * Ulrich Drepper has contributed new implementations of the floating-point
2192 printing and reading code used in the `printf' family of functions and
2193 `strtod', `strtof', and `strtold'. These new functions are perfectly
2194 accurate, and much faster than the old ones.
2196 * The implementation of the POSIX locale model was completely rewritten by
2197 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2198 to compile the POSIX locale definition.
2200 * The former dummy implementations of the strcoll and strxfrm function are
2201 now replaced by fully functional code contributed by Ulrich Drepper. The
2202 collation information comes from the POSIX locale definitions.
2204 * The new header <langinfo.h> defines an interface for accessing
2205 various locale-dependent data (using the locale chosen with `setlocale').
2207 * Ulrich Drepper has contributed a new suite of functions for operation on
2208 wide-character and multibyte-character strings, in <wchar.h>;
2209 and classification and case conversion of wide characters, in <wctype.h>.
2210 These new functions are conforming to the ISO C, Amendement 1 specification.
2212 * There is now a second implementation of the standard I/O library available.
2213 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2214 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2216 * You can now use positional parameter specifications in format strings
2217 for the `printf' and `scanf' families of functions. For example,
2218 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2219 ``Number 6, Mr Jones''. This is mainly useful when providing different
2220 format strings for different languages, whose grammars may dictate
2221 different orderings of the values being printed. To support this
2222 feature, the interface for `register_printf_handler' has changed; see
2223 the header file <printf.h> for details.
2225 * The `printf' and `scanf' families of functions now understand a new
2226 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2227 to group numbers as indicated by the locale; for `scanf' and friends, this
2228 says to accept as valid only a number with all the proper grouping
2229 separators in the right places. In the default "C" locale, numbers are
2230 not grouped; but locales for specific countries will define the usual
2231 conventions (i.e. separate thousands with `,' in the US locale).
2233 * The pgrp functions have been regularized, slightly incompatibly but much
2234 less confusingly. The core functions are now `getpgid' and `setpgid',
2235 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2236 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2237 provided for compatibility. There is no longer an incompatible `getpgrp'
2238 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2240 * The new header file <fts.h> and suite of functions simplify programs that
2241 operate on directory trees. This code comes from 4.4 BSD.
2243 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2244 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2245 NSS scheme used in glibc.
2247 * There is a new malloc debugging hook `__memalign_hook'.
2249 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2250 `unsigned int' in <sys/types.h>. These are for compatibility only and
2251 their use is discouraged.
2253 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2254 done differently, so that it works even without GNU ld.
2256 * New function `euidaccess' checks allowed access to a file like `access',
2257 but using the effective IDs instead of the real IDs.
2259 * The time zone data files have been updated for the latest and greatest
2260 local time conventions of the countries of the world.
2262 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2265 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2266 for formatting floating-point numbers. They are provided only for
2267 compatibility; new programs should use `sprintf' instead. There are
2268 also equivalent function for the `long double' floating-point type and
2269 all functions also exist in a reentrant form.
2271 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2272 functions for maintaining the login-record files (primarily of use to
2273 system programs such as `login'), and convenient functions for
2274 allocating and initializing a pseudo-terminal (pty) device.
2276 * Ulrich Drepper has contributed new support for System V style
2277 shared memory and IPC on systems that support it.
2279 * Ulrich Drepper has contributed several miscellaneous new functions found
2280 in System V: The `hsearch' family of functions provide an effective
2281 implementation of hash tables; `a64l' and `l64a' provide a very simple
2282 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2285 * Ulrich Drepper has contributed new reentrant counterparts for the
2286 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2288 * Ulrich Drepper has contributed new, highly-optimized versions of several
2289 string functions for the i486/Pentium family of processors.
2291 * Ulrich Drepper has updated the Linux-specific code, based largely
2292 on work done in Hongjiu Lu's version of GNU libc for Linux.
2293 The GNU library now supports Linux versions 2.0.10 and later,
2294 using the ELF object file format (i[3456]86-*-linux).
2296 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2298 * David Mosberger-Tang and Richard Henderson have ported the C library
2299 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2300 dynamic linking support for ELF/Alpha.
2302 * Richard Henderson contributed several Alpha optimized assembler function
2303 for arithmetic and string handling.
2305 * Ulrich Drepper has contributed a new set of message catalog functions to
2306 support multiple languages using the <libintl.h> interface, for use with
2307 his new package GNU gettext. Translation volunteers have contributed
2308 catalogs of the library's messages in Spanish, German, and Korean.
2310 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2311 program and the `catgets' function for reading the catalog files it
2312 creates. (The <libintl.h> interface is preferred; we include the
2313 <nl_types.h> interface using `catgets' only for source compatibility with
2314 programs already written to use it.)
2316 * New header file <values.h> gives SVID-compatible names for <limits.h>
2319 * Various new macros, declarations, and small header files for compatibility
2322 * New function `group_member' is a convenient way to check if a process has
2323 a given effective group ID.
2325 * When using GCC 2.7 and later, the socket functions are now declared in a
2326 special way so that passing an argument of type `struct sockaddr_in *',
2327 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2328 `struct sockaddr *' type, does not generate a type-clash warning.
2330 * New function `error' declared in header file <error.h> is a convenient
2331 function for printing error messages and optionally exiting; this is the
2332 canonical function used in GNU programs. The new functions `err', `warn',
2333 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2334 doing the same thing.
2336 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2337 POSIX.2 `glob' function to do ~ and {...} expansion.
2339 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2340 `clearenv' which is used in POSIX.9 is also available.
2342 * New function `getsid' returns session ID number on systems that support it.
2344 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2345 files <db.h> and <mpool.h> provide a rich set of functions for several
2346 types of simple databases stored in memory and in files, and <ndbm.h> is
2347 an old `ndbm'-compatible interface using the `db' functions. Link with
2348 `-ldb' to get these functions.
2350 * New macro `strdupa' copies a string like `strdup', but uses local stack
2351 space from `alloca' instead of dynamic heap space from `malloc'.
2353 * New function `strnlen' is like `strlen' but searches only a given maximum
2354 number of characters for the null terminator. `stpncpy', `strndup' and
2355 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2358 * New function `statfs' in header <sys/statfs.h>.
2360 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2361 provide convenient functions for operating on blocks of null-terminated
2364 * A new suite of functions in <utmp.h> handle all the details of reading
2365 and writing the utmp file.
2367 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2370 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2371 completely POSIX compliant and also implemented the extended functionality
2372 to handle alternate digit representation and alternate era date formats.
2374 * Ulrich Drepper provided an implementation of the `strptime' function
2375 defined in XPG4.2 which transforms a string into a `struct tm' value.
2377 * Paul Eggert provided the tzselect shell script as part of the timezone
2378 code. The shell script makes it easy to select the correct timezone
2381 * The implementation of the malloc family of functions is completely replaced
2382 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2383 The implementation uses the mmap function (if available) and it is
2384 optimized for the use in multi threaded programs.
2386 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2387 functions. This new functionality is usable by specifying a special
2388 salt string and it is compatible with implementation on *BSD systems.
2390 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2391 `getsubopt' to handle second level command line options, `bsd_signal'
2392 to access BSD style `signal' functionality, the obsolete `regexp' style
2395 * the `lchown' function is available on system which support this
2398 * The implementation of the shadow password handling function was contributed
2401 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2403 * POSIX.1g support was added. The <sys/select.h> header is available,
2404 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2405 implementation of `getaddrinfo'.
2409 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2411 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2412 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2414 * The new function `daemon' from 4.4 BSD is useful for server programs that
2415 want to put themselves in the background.
2417 * Joel Sherrill has contributed support for several standalone boards that
2418 run without an operating system.
2420 * `printf', `scanf' and friends now accept a `q' type modifier for long
2421 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2423 * All of the code taken from BSD (notably most of the math and networking
2424 routines) has been updated from the BSD 4.4-Lite release.
2426 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2428 * The new functions `getdomainname' and `setdomainname' fetch or change the
2429 YP/NIS domain name. These are system calls which exist on systems which
2432 * The time zone data files have been updated for the latest international
2435 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2436 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2440 * The C library now includes support for Sun RPC, from Sun's free
2441 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2442 are included. (There is still no support for YP.)
2444 * Tom Quinn has contributed a port of the C library to SGI machines running
2445 Irix 4 (mips-sgi-irix4).
2447 * The new `lockf' function is a simplified interface to the locking
2448 facilities of `fcntl', included for compatibility.
2450 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2452 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2454 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2457 * The error message printed by `assert' for a failed assertion now includes
2458 the name of the program (if using GNU ld) and the name of the calling
2459 function (with versions of GCC that support this).
2461 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2463 * The library now includes the <sys/mman.h> header file and memory
2464 management functions `mmap', `munmap', `mprotect', `msync', and
2465 `madvise', on systems that support those facilities.
2467 * The interface for `mcheck' has changed slightly: the function called to
2468 abort the program when an allocation inconsistency is detected now takes
2469 an argument that indicates the type of failure. The new function
2470 `mprobe' lets you request a consistency check for a particular block at
2471 any time (checks are normally done only when you call `free' or `realloc'
2474 * It is now possible to easily cross-compile the C library, building on one
2475 system a library to run on another machine and/or operating system. All
2476 you need to do is set the variable `HOST_CC' in `configparms' to the
2477 native compiler for programs to run on the machine you are building on (a
2478 few generator programs are used on Unix systems); set `CC' to the
2481 * The new function `fexecve' (only implemented on the GNU system) executes
2482 a program file given a file descriptor already open on the file.
2486 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2487 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2489 * You can set the variable `libprefix' in `configparms' to specify a prefix
2490 to be prepended to installed library files; this makes it easy to install
2491 the GNU C library to be linked as `-lgnuc' or whatever.
2493 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2494 copies a limited number of characters from a string, and returns the
2495 address of the last character written.
2497 * You no longer need to check for whether the installed `stddef.h' is
2498 compatible with the GNU C library. configure now checks for you.
2500 * You can now define a per-stream `fileno' function to convert the
2501 stream's cookie into an integral file descriptor.
2503 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2504 allocates zero bytes of storage, and returns a unique pointer which
2505 you can pass to `realloc' or `free'. The behavior is undefined if
2506 you dereference this pointer.
2508 * The C library now runs on Sony NEWS m68k machines running either
2509 NewsOS 3 or NewsOS 4.
2511 * The new `syscall' function is a system-dependent primitive function
2512 for invoking system calls. It has the canonical behavior on Unix
2513 systems, including unreliable return values for some calls (such as
2514 `pipe', `fork' and `getppid').
2516 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2517 to `EAGAIN', which is the preferred name. On systems whose kernels
2518 use two distinct codes, the C library now translates EWOULDBLOCK to
2519 EAGAIN in every system call function.
2523 * The GNU C Library Reference Manual is now distributed with the library.
2524 `make dvi' will produce a DVI file of the printed manual.
2525 `make info' will produce Info files that you can read on line using C-h i
2526 in Emacs or the `info' program.
2527 Please send comments on the manual to bug-glibc-manual@gnu.org.
2529 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2531 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2533 * Jason Merrill has contributed a port to the Sequent Symmetry running
2534 Dynix version 3 (i386-sequent-dynix).
2536 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2537 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2539 * New function `memory_warnings' lets you arrange to get warnings when
2540 malloc is running out of memory to allocate, like Emacs gives you.
2542 * The C library now contains the relocating allocator used in Emacs 19 for
2543 its editing buffers. This allocator (ralloc) minimizes allocation
2544 overhead and fragmentation by moving allocated regions around whenever it
2545 needs to. You always refer to a ralloc'd region with a "handle" (a
2546 pointer to a pointer--an object of type `void **').
2548 * There is a new `printf' format: `%m' gives you the string corresponding
2549 to the error code in `errno'.
2551 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2552 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2553 pass, the `a' modifier says to fill in a `char **' you pass with a
2556 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2557 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2558 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2560 * `mkstemp' is a traditional Unix function to atomically create and open a
2561 uniquely-named temporary file.
2565 * The standard location for the file that says what the local timezone is
2566 has changed again. It is now `/usr/local/etc/localtime' (or more
2567 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2569 * The distribution no longer contains any files with names longer than 14
2572 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2573 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2575 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2579 * The configuration process has changed quite a bit. The `configure'
2580 script is now used just like the configuration scripts for other GNU
2581 packages. The `sysdeps' directory hierarchy is much rearranged.
2582 The file `INSTALL' explains the new scheme in detail.
2584 * The header files no longer need to be processed into ANSI C and
2585 traditional C versions. There is just one set of files to install, and
2586 it will work with ANSI or old C compilers (including `gcc -traditional').
2588 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2589 MIPS DECStation running Ultrix 4.
2591 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2592 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2593 made itself into a shared library.
2595 * Yet further improved support for the i386, running 4.3 BSD-like systems
2596 (such as Mach 3 with the Unix single-server), or System V.
2598 * New function `strncasecmp' to do case-insensitive string comparison
2599 with limited length.
2601 * New function `strsep' is a reentrant alternative to `strtok'.
2603 * New functions `scandir' and `alphasort' for searching directories.
2605 * New function `setenv' is a better interface to `putenv'.
2607 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2608 function for traversing a directory tree.
2610 * The GNU obstack package is now also part of the C library.
2611 The new function `open_obstack_stream' creates a stdio stream that
2612 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2613 formatted output directly to an obstack.
2615 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2616 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2618 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2620 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2621 things to your strings.
2623 * There are some new test programs: test-fseek, testmb, and testrand.
2625 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2626 These ports are not finished, but are a good starting place for really
2627 supporting those systems.
2629 * `/etc/localtime' is now the standard location for the file that says what
2630 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2631 This follows the general principle that `/etc' is the place for all local
2632 configuration files.
2634 * The C library header files now use `extern "C"' when used by the C++
2635 compiler, so the C library should now work with C++ code.
2637 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2638 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2641 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2642 function which uses the `merge sort' algorithm, and is said to be
2643 significantly faster than the old GNU `qsort' function. Merge sort is
2644 now the standard `qsort' function. The new algorithm can require a lot
2645 of temporary storage; so, the old sorting function is called when the
2646 required storage is not available.
2648 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2649 provides the Unix `crypt' function, plus some other entry points.
2651 * The code and header files taken from 4.4 BSD have been updated with the
2652 latest files released from Berkeley.
2654 ----------------------------------------------------------------------
2655 Copyright information:
2657 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2659 Permission is granted to anyone to make or distribute verbatim copies
2660 of this document as received, in any medium, provided that the
2661 copyright notice and this permission notice are preserved,
2662 thus giving the recipient permission to redistribute in turn.
2664 Permission is granted to distribute modified versions
2665 of this document, or of portions of it,
2666 under the above conditions, provided also that they
2667 carry prominent notices stating who last changed them.
2670 version-control: never