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, 17776, 17779, 17792,
15 17836, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967,
16 17969, 17978, 17987, 17991, 17996, 17998, 17999, 18019, 18020, 18029,
17 18030, 18032, 18036, 18038, 18039, 18042, 18043, 18046, 18047, 18068,
18 18080, 18093, 18100, 18104, 18110, 18111, 18128, 18138, 18185, 18197,
19 18206, 18210, 18211, 18247, 18287.
21 * A buffer overflow in gethostbyname_r and related functions performing DNS
22 requests has been fixed. If the NSS functions were called with a
23 misaligned buffer, the buffer length change due to pointer alignment was
24 not taken into account. This could result in application crashes or,
25 potentially arbitrary code execution, using crafted, but syntactically
26 valid DNS responses. (CVE-2015-1781)
28 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
29 for LD and GD on x86 and x86-64, has been implemented. You will need
30 binutils-2.24 or later to enable this optimization.
32 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
33 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
34 Hat). These updates cause user visible changes, such as the fix for bug
40 * The following bugs are resolved with this release:
42 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
43 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
44 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
45 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
46 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
47 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
48 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
49 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
50 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
51 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
54 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
55 too little memory for the to-be-scanned arguments and overflow the
56 allocated buffer. The implementation now correctly computes the required
57 buffer size when using malloc, and switches to malloc from alloca as
60 * A new semaphore algorithm has been implemented in generic C code for all
61 machines. Previous custom assembly implementations of semaphore were
62 difficult to reason about or ensure that they were safe. The new version
63 of semaphore supports machines with 64-bit or 32-bit atomic operations.
64 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
65 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
67 * Port to Altera Nios II has been contributed by Mentor Graphics.
69 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
70 implementations for powerpc64/powerpc64le.
71 Implemented by Adhemerval Zanella (IBM).
73 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
74 and powerpc64le. This may improve lock scaling of existing programs on
75 HTM capable systems. The lock elision code is only enabled with
76 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
77 powerpc will issue a transaction abort on every syscall to avoid side
78 effects being visible outside transactions.
80 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
81 AArch64. Contributed by ARM Ltd.
83 * i386 memcpy functions optimized with SSE2 unaligned load/store.
85 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
86 under certain input conditions resulting in the execution of a shell for
87 command substitution when the application did not request it. The
88 implementation now checks WRDE_NOCMD immediately before executing the
89 shell and returns the error WRDE_CMDSUB as expected.
91 * CVE-2012-3406 printf-style functions could run into a stack overflow when
92 processing format strings with a large number of format specifiers.
94 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
95 infinite loop if the DNS response contained a PTR record of an unexpected
98 * The minimum GCC version that can be used to build this version of the GNU
99 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
100 still be used to compile programs using the GNU C Library.
102 * The GNU C Library is now built with -Werror by default. This can be
103 disabled by configuring with --disable-werror.
105 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
107 * The obsolete sigvec function has been removed. This was the original
108 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
109 programs have been using instead for about 25 years. Of course, ABI
110 compatibility for old binaries using sigvec remains intact.
112 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
113 with newer versions of bison.
115 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
116 The original MIPS o32 hard-float ABI requires an FPU where double-precision
117 registers overlay two consecutive single-precision registers. MIPS32R2
118 introduced a new FPU mode (FR=1) where double-precision registers extend the
119 corresponding single-precision registers which is incompatible with the
120 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
121 require the use of FR=1 making a transition necessary. New o32 ABI
122 extensions enable users to migrate over time from the original o32 ABI
123 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
124 tracks the ABI of any loaded object and verifies that new objects are
125 compatible. Mode transitions will also be requested as required and
126 unsupportable objects will be rejected. The ABI checks include both soft and
127 hard float ABIs for o32, n32 and n64.
129 GCC 5 with GNU binutils 2.25 onwards:
130 It is strongly recommended that all o32 system libraries are built using the
131 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
132 with the original and all new o32 ABI extensions. Configure a MIPS GCC
133 compiler using --with-fp-32=xx to set this by default.
137 * The following bugs are resolved with this release:
139 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
140 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
141 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
142 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
143 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
144 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
145 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
146 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
147 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
148 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
149 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
150 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
151 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
152 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
153 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
155 * Reverted change of ABI data structures for s390 and s390x:
156 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
157 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
158 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
159 are preserved pointing straight to the same implementation as the old ones.
160 Given that, new callers will simply provide a too-big buffer to these
161 functions. Any applications/libraries out there that embed jmp_buf or
162 ucontext_t in an ABI-relevant data structure that have already been rebuilt
163 against 2.19 headers will have to rebuilt again. This is necessary in any
164 case to revert the breakage in their ABI caused by the glibc change.
166 * Support for file description locks is added to systems running the
167 Linux kernel. The standard file locking interfaces are extended to
168 operate on file descriptions, not file descriptors, via the use of
169 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
170 are associated with an open file instead of a process.
172 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
174 * The minimum Linux kernel version that this version of the GNU C Library
175 can be used with is 2.6.32.
177 * Running the testsuite no longer terminates as soon as a test fails.
178 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
179 with PASS or FAIL lines for individual tests. A summary of the results is
180 printed, including a list of failing lists, and "make check" exits with
181 error status if there were any unexpected failures. "make check
182 stop-on-test-failure=y" may be used to keep the old behavior.
184 * The am33 port, which had not worked for several years, has been removed
187 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
188 supported; they now act the same as _DEFAULT_SOURCE (but generate a
189 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
190 conflicted with POSIX (support for which was removed in 2.19), the
191 interfaces those macros enabled remain available when compiling with
192 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
195 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
197 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
198 This may improve lock scaling of existing programs on TX capable systems.
199 The lock elision code is only built with --enable-lock-elision=yes and
200 then requires a GCC version supporting the TX builtins. With lock elision
201 default mutexes are elided via __builtin_tbegin, if the cpu supports
202 transactions. By default lock elision is not enabled and the elision code
205 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
206 copy the path argument. This allowed programs to cause posix_spawn to
207 deference a dangling pointer, or use an unexpected pathname argument if
208 the string was modified after the posix_spawn_file_actions_addopen
211 * All supported architectures now use the main glibc sysdeps directory
212 instead of some being in a separate "ports" directory (which was
213 distributed separately before glibc 2.17).
215 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
216 On configurations that support it (all Linux configurations), it's now
217 used regardless of the --enable-add-ons switch to configure. It is no
218 longer possible to build such configurations without pthreads support.
220 * Locale names, including those obtained from environment variables (LANG
221 and the LC_* variables), are more tightly checked for proper syntax.
222 setlocale will now fail (with EINVAL) for locale names that are overly
223 long, contain slashes without starting with a slash, or contain ".." path
224 components. (CVE-2014-0475) Previously, some valid locale names were
225 silently replaced with the "C" locale when running in AT_SECURE mode
226 (e.g., in a SUID program). This is no longer necessary because of the
229 * On x86-64, the dynamic linker's lazy-binding support is now compatible
230 with application code using Intel MPX instructions. (With all previous
231 versions, the MPX register state could be clobbered when making calls
232 into or out of a shared library.) Note that while the new dynamic
233 linker is compatible with all known x86 hardware whether or not it
234 supports Intel MPX, some x86 instruction-set emulators might fail to
235 handle the new instruction encodings. This is known to affect Valgrind
236 versions up through 3.9 (but will be fixed in the forthcoming 3.10
237 release), and might affect other tools that do instruction emulation.
239 * Support for loadable gconv transliteration modules has been removed.
240 The support for transliteration modules has been non-functional for
241 over a decade, and the removal is prompted by security defects. The
242 normal gconv conversion modules are still supported. Transliteration
243 with //TRANSLIT is still possible, and the //IGNORE specifier
244 continues to be supported. (CVE-2014-5119)
246 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
247 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
248 resulting a denial-of-service security vulnerability in applications which
249 use functions related to iconv. (CVE-2014-6040)
253 * The following bugs are resolved with this release:
255 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
256 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
257 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
258 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
259 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
260 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
261 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
262 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
263 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
264 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
265 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
266 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
267 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
268 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
269 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
270 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
271 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
272 16431, 16453, 16474, 16506, 16510, 16529
274 * Slovenian translations for glibc messages have been contributed by the
275 Translation Project's Slovenian team of translators.
277 * The public headers no longer use __unused nor __block. This change is to
278 support compiling programs that are derived from BSD sources and use
279 __unused internally, and to support compiling with Clang's -fblock
280 extension which uses __block.
282 * CVE-2012-4412 The strcoll implementation caches indices and rules for
283 large collation sequences to optimize multiple passes. This cache
284 computation may overflow for large collation sequences and may cause a
285 stack or buffer overflow. This is now fixed to use a slower algorithm
286 which does not use a cache if there is an integer overflow.
288 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
289 rules for large collation sequences to optimize multiple passes and falls
290 back to alloca if malloc fails, resulting in a possible stack overflow.
291 The implementation now falls back to an uncached collation sequence lookup
294 * CVE-2013-4788 The pointer guard used for pointer mangling was not
295 initialized for static applications resulting in the security feature
296 being disabled. The pointer guard is now correctly initialized to a
297 random value for static applications. Existing static applications need
298 to be recompiled to take advantage of the fix (bug 15754).
300 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
301 to the d_name member of struct dirent, or omit the terminating NUL
302 character. (Bugzilla #14699).
304 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
305 aligned_alloc functions could allocate too few bytes or corrupt the
306 heap when passed very large allocation size values (Bugzilla #15855,
309 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
310 for AF_INET6 has been fixed (Bugzilla #16072).
312 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
313 pap_CW, quz_PE, the_NP.
315 * Substantially revised locales: gd_GB, ht_HT
317 * The LC_ADDRESS field was updated to support country_car for almost all
320 * ISO 1427 definitions were updated.
322 * ISO 3166 definitions were updated.
324 * The localedef utility now supports --big-endian and --little-endian
325 command-line options to generate locales for a different system from that
326 for which the C library was built.
328 * Binary locale files now only depend on the endianness of the system for
329 which they are generated and not on other properties of that system. As a
330 consequence, binary files generated with new localedef may be incompatible
331 with old versions of the GNU C Library, and binary files generated with
332 old localedef may be incompatible with this version of the GNU C Library,
333 in the following circumstances:
335 + Locale files may be incompatible on m68k systems.
337 + Locale archive files (but not separate files for individual locales) may
338 be incompatible on systems where plain "char" is signed.
340 * The configure option --disable-versioning has been removed. Builds with
341 --disable-versioning had not worked for several years.
343 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
344 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
346 * SystemTap probes for malloc have been introduced.
348 * SystemTap probes for slow multiple precision fallback paths of
349 transcendental functions have been introduced.
351 * Support for powerpc64le has been added.
353 * The soft-float powerpc port now supports e500 processors.
355 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
357 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
358 set of header declarations that are enabled by default, even when other
359 feature test macros or compiler options such as -std=c99 would otherwise
360 disable some of those declarations.
362 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
363 conflict with POSIX. The libbsd-compat library (which was a dummy library
364 that did nothing) has also been removed.
366 * Preliminary documentation about Multi-Thread, Async-Signal and
367 Async-Cancel Safety has been added.
369 * Change of ABI data structures for s390 and s390x:
370 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
371 allow for future hardware extensions. All library functions that accept or
372 return these structures were versioned in order to provide backwards
373 compatibility with existing code. However, not all cases can be handled
374 with interface versioning. If an application embeds either structure into
375 another structure and that structure is passed to another compilation unit
376 which expects the newer larger-sized object then any access to the new
377 fields will result in undefined behaviour. Similarly any access to fields
378 that were moved by the enlarging of the structures will cause undefined
379 behaviour. To fix the undefined behaviour all objects that are part of the
380 final in-memory image must agree on the size of structures, and this may
381 require recompilation.
385 * The following bugs are resolved with this release:
387 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
388 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
389 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
390 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
391 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
392 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
393 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
394 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
395 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
396 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
397 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
398 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
399 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
402 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
403 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
404 Distributions can re-enable building and using pt_chown via the new configure
405 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
406 considerable security risks and should only be used if the distribution
407 understands and accepts the risks.
409 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
412 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
413 fixed (Bugzilla #15330).
415 * Add support for calling C++11 thread_local object destructors on thread
416 and program exit. This needs compiler support for offloading C++11
417 destructor calls to glibc.
419 * Improved worst case performance of libm functions with double inputs and
422 * Support for priority inherited mutexes in pthread condition variables on
423 non-x86 architectures.
425 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
427 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
429 * Optimized string functions for ARM. Implemented by Will Newton and
432 * Optimized libm functions for SPARC. Implemented by David S. Miller.
434 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
437 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
438 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
440 * Added a benchmark framework to track performance of functions in glibc.
442 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
443 It is based on draft TS 18661 and currently enabled as a GNU extension.
445 * On Linux, the clock function now uses the clock_gettime system call
446 for improved precision, rather than old times system call.
448 * Added support for version-3 tz format files. This is needed when using
449 the tz database release 2013e or later, and affects a few unusual cases --
450 currently only TZ='America/Godthab' for time stamps after 2037.
452 * Added new API functions pthread_getattr_default_np and
453 pthread_setattr_default_np to get and set the default pthread
454 attributes of a process.
456 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
457 This may improve lock scaling of existing programs on TSX capable systems.
458 When the --enable-lock-elision=yes parameter is specified at configure
459 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
462 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
463 availability). Implemented by Ryan S. Arnold.
465 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
469 * The following bugs are resolved with this release:
471 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
472 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
473 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
474 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
475 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
476 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
477 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
478 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
479 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
480 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
481 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
482 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
483 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
484 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
485 14879, 14889, 14893, 14898, 14914.
487 * Optimization of memcpy for MIPS.
489 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
490 EMFILE has been fixed (Bugzilla #14889).
492 * The add-on ports collection is now distributed in the "ports" subdirectory
493 of the main GNU C Library distribution, rather than separately.
495 * Port to ARM AArch64 contributed by Linaro.
497 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
498 Optimized versions of memcpy, memset, and memcmp added for System z10 and
500 Implemented by Andreas Krebbel.
502 * The new function secure_getenv allows secure access to the environment,
503 returning NULL if running in a SUID/SGID process. This function replaces
504 the internal function __secure_getenv.
506 * SystemTap static probes have been added into the dynamic linker.
507 Implemented by Gary Benson.
509 * Optimizations of string functions strstr, strcasestr and memmem.
510 Implemented by Maxim Kuvyrkov.
512 * The minimum Linux kernel version that this version of the GNU C Library
513 can be used with is 2.6.16.
515 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
516 powerpc POWER7. Implemented by Will Schmidt.
518 * New configure option --disable-nscd builds the C library such that it
519 never attempts to contact the Name Service Caching Daemon (nscd).
520 New configure option --disable-build-nscd avoids building nscd itself;
521 this is the default if --disable-nscd is used.
523 * Improved support for cross-compilation, including cross-testing and
524 bootstrap builds without a previously built glibc.
526 * Several testsuite tests are now able to test multiple IFUNC variants of an
527 interface, rather than just testing the one that would be chooen by
530 * New configure options --with-bugurl and --with-pkgversion, for
531 distributors to use to embed their bug-reporting and package version
532 information in --help and --version output.
534 * The ttyname and ttyname_r functions on Linux now fall back to searching for
535 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
536 allows creation of chroots without the procfs mounted on /proc.
538 * The `crypt' function now fails if passed salt bytes that violate the
539 specification for those values. On Linux, the `crypt' function will
540 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
541 enabled, and fail on encrypted strings using the MD5 or DES algorithm
542 when the mode is enabled.
544 * The `clock_*' suite of functions (declared in <time.h>) is now available
545 directly in the main C library. Previously it was necessary to link with
546 -lrt to use these functions. This change has the effect that a
547 single-threaded program that uses a function such as `clock_gettime' (and
548 is not linked with -lrt) will no longer implicitly load the pthreads
549 library at runtime and so will not suffer the overheads associated with
550 multi-thread support in other code such as the C++ runtime library.
552 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
557 * The following bugs are resolved with this release:
559 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
560 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
561 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
562 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
563 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
564 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
565 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
566 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
567 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
568 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
569 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
570 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
571 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
572 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
573 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
574 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
575 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
576 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
577 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
578 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
579 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
580 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
583 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
584 configuring glibc with:
585 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
586 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
587 Implemented by H.J. Lu.
591 + define static_assert
593 + do not declare gets
595 + declare at_quick_exit and quick_exit also for ISO C11
597 + aligned_alloc. NB: The code is deliberately allows the size parameter
598 to not be a multiple of the alignment. This is a moronic requirement
599 in the standard but it is only a requirement on the caller, not the
604 + uchar.h support added
606 + CMPLX, CMPLXF, CMPLXL added
608 Implemented by Ulrich Drepper.
610 * Support for the IA-64 has been moved to ports.
612 * Remove support for anything but ELF binary format
614 * Checking versions of poll, ppoll added.
615 Implemented by Ulrich Drepper.
617 * More generic and 64-bit performance optimizations to math functions.
618 Implemented by Ulrich Drepper.
620 * New configure option --enable-obsolete-rpc makes the deprecated RPC
621 headers and functions available at compile time as they were before
622 version 2.14. This option will be removed at some time in the future
623 after the TI-RPC library becomes fully sufficient for the needs of
624 existing applications.
626 * Compatibility code for Linux kernel versions before 2.4 has been removed.
627 Note that glibc is not expected to work with any Linux kernel version
630 * New header <sys/auxv.h> and function getauxval allowing easy access to
631 the AT_* key-value pairs passed from the Linux kernel. The header also
632 defines the HWCAP_* bits associated with the AT_HWCAP key.
634 * New locales: mag_IN
636 * New configure option --enable-systemtap builds SystemTap static probes
637 into libc for setjmp and longjmp and into libpthread for various operations.
638 So far the setjmp/longjmp probes and some of the libpthread probes are
639 provided only for i*86 and x86_64.
640 Implemented by Roland McGrath and Rayson Ho.
642 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
644 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
647 * More optimized functions for SPARC. Implemented by David S. Miller.
649 * Improved support for cross-compilation, especially bootstrap builds
650 without a previously built glibc.
652 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
653 Chris Metcalf from Tilera.
655 * Support for the old ARM ABI has been removed from ports. Only the EABI is
656 now supported for ARM processors.
658 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
659 as the name of the dynamic linker, to distinguish it from the
660 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
662 * Support for CRIS has been removed from ports.
664 * A new class of installed header has been documented for low-level
665 platform-specific functionality. PowerPC added the first instance with a
666 function to provide time base register access. Contributed by Tulio
667 Magno Quites Machado Filho.
669 * ix86 configurations now install header files that are consistent with
670 what x86-64 configurations install. These same header files can be used
671 for -m32, -m64, or -mx32 builds.
672 Contributed by H.J. Lu.
674 * Math library bug fixes. A thorough audit of all open math library bugs was
675 conducted by Joseph Myers. Significant progress was made on many math
676 library bugs resulting in more accurate exceptions and function results.
677 Many thanks to all those that contributed including Andreas Jaeger for his
678 patch review and work on the x87 trigonometric instruction issues.
680 * Timezone data is no longer installed. Timezone-related binaries and scripts
681 will continue to be installed. Users should obtain their timezone data from
682 their distribution provider or from the tzdata package at
683 <ftp://munnari.oz.au/pub/>.
687 * The following bugs are resolved with this release:
689 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
690 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
691 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
692 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
693 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
694 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
695 13484, 13506, 13515, 13523, 13524, 13538, 13540
697 * New program pldd to list loaded object of a process
698 Implemented by Ulrich Drepper.
700 * Add nss_db support back to glibc. No more dependency on Berkeley db
701 and support for initgroups lookups.
702 Implemented by Ulrich Drepper.
704 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
705 Contributed by HJ Lu.
707 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
708 Contributed by HJ Lu.
710 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
711 on x86-32 and x86-64.
712 Contributed by Liubov Dmitrieva.
714 * Optimized strchr and strrchr for SSE on x86-32.
715 Contributed by Liubov Dmitrieva.
717 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
718 for x86-64 and x86-32.
719 Contributed by Liubov Dmitrieva.
721 * New interfaces: scandirat, scandirat64
722 Implemented by Ulrich Drepper.
724 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
725 Implemented by Ulrich Drepper.
727 * nscd now also caches the netgroup database.
728 Implemented by Ulrich Drepper.
730 * Integrate libm with gcc's -ffinite-math-only option.
731 Implemented by Ulrich Drepper.
733 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
734 to math functions. Implemented by Ulrich Drepper.
736 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
737 Implemented by Ulrich Drepper.
739 * New Linux interfaces: process_vm_readv, process_vm_writev
741 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
742 Implemented by Ulrich Drepper.
744 * Optimized nearbyint and strcasecmp for PPC.
745 Implemented by Adhemerval Zanella.
747 * New locales: bho_IN, unm_US, es_CU, ta_LK
751 * The following bugs are resolved with this release:
753 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
754 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
755 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
756 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
757 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
758 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
759 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
760 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
761 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
762 12795, 12811, 12813, 12814, 12841
764 * The RPC implementation in libc is obsoleted. Old programs keep working
765 but new programs cannot be linked with the routines in libc anymore.
766 Programs in need of RPC functionality must be linked against TI-RPC.
767 The TI-RPC implementation is IPv6 enabled and there are other benefits.
769 Visible changes of this change include (obviously) the inability to link
770 programs using RPC functions without referencing the TI-RPC library and the
771 removal of the RPC headers from the glibc headers.
772 Implemented by Ulrich Drepper.
774 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
775 syncfs, setns, sendmmsg
777 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
778 yue_HK, lij_IT, mhr_RU
780 * New encodings: CP770, CP771, CP772, CP773, CP774
782 * New program sotruss to trace calls through PLTs
783 Implemented by Ulrich Drepper.
785 * The malloc hook implementation is marked deprecated and will be removed
786 from the default implementation in the next version. The design never
787 worked ever since the introduction of threads. Even programs which do
788 not create threads themselves can use multiple threads created internally.
792 * The following bugs are resolved with this release:
794 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
795 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
796 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
797 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
800 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
802 * POWER7 optimizations: memset, memcmp, strncmp
804 * New optimized string functions for x86-64: strnlen (SSE2),
805 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
806 Implemented by Ulrich Drepper.
810 * The following bugs are resolved with this release:
812 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
813 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
814 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
815 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
816 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
817 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
818 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
819 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
821 * New interfaces: pthread_getname_np, pthread_setname_np
823 * New Linux interface: recvmmsg
825 * STT_GNU_IFUNC implemented for Sparc by David Miller.
827 * The dynamic linker now recognizes supported ABI versions from the
828 EI_ABIVERSION field in the ELF header.
829 Implemented by Ulrich Drepper.
831 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
832 will not be used to fill in password fields in the passwd.byname replies.
833 Instead it is used to synthesize the shadow.byname table, should it be
834 missing. This is a useful mode in some installations involving Solaris.
835 Implemented by Ulrich Drepper.
837 * New locales: kok_IN, sq_MK, cv_RU
841 * The following bugs are resolved with this release:
843 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
844 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
845 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
846 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
847 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
848 10789, 10817, 10823, 10840, 10847
850 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
852 Implemented by Ulrich Drepper.
854 * Checking version of longjmp added that fails if an uninitialized stack
855 frame would be created. Implemented by Ulrich Drepper.
857 * STT_GNU_IFUNC is now supported in static executables.
858 Implemented by H.J. Lu.
860 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
862 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
863 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
864 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
865 Contributed by H.J. Lu.
867 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
868 Implemented by Ulrich Drepper.
870 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
872 Contributed by H.J. Lu.
874 * Support for fma instruction in AVX on x86-64.
875 Implemented by H.J. Lu and Ulrich Drepper.
877 * AVX support in x86-64 auditing support in ld.so.
878 Implemented by H.J. Lu.
880 * STB_GNU_UNIQUE support added.
881 Implemented by Ulrich Drepper.
883 * Implement second fallback mode for optimized DNS lookup for even more
884 broken environments. If two requests from the same port are not
885 handled correctly close the socket and open a new one before sending
886 the second request. The 'single-request-reopen' option in /etc/resolv.conf
887 can be used to select this mode right away, instead of rediscovering the
888 necessity is every process again.
889 Implemented by Ulrich Drepper.
891 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
892 Implemented by Adam Tkac.
894 * Optimized iconv conversions for S390x.
895 Implemented by Andreas Krebbel.
897 * Using condvars with PI mutexes is now more efficient due to kernel
898 support for requeueing to PI futexes. NPTL support added for x86-64.
899 Implemented by Ulrich Drepper.
901 * New locales: ps_AF, my_MM
905 * The following bugs are resolved with this release:
907 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
908 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
909 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
910 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
911 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
913 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
914 Implemented by Ulrich Drepper.
916 * New Linux interfaces: accept4, fallocate, fallocate64.
917 Implemented by Ulrich Drepper.
919 * Correct declarations of string function when used in C++ code. This
920 could lead to compile errors for invalid C++ code.
922 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
925 * New POSIX 2008 interface: psiginfo
926 Implemented by Ulrich Drepper.
928 * New ISO C++1x interfaces: quick_exit, at_quick_exit
929 Implemented by Ulrich Drepper.
931 * Support for selecting between multiple function definitions at runtime
932 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
934 * The libcrypt library can now use the hash function implementations in
935 NSS. Implemented by Ulrich Drepper.
937 * The malloc implementation can be compiled to be less memory efficient
938 but higher performing in multi-threaded programs.
939 Implemented by Ulrich Drepper.
941 * New locales: nan_TW@latin, ks_IN
943 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
944 Implemented by Ulrich Drepper.
946 * Extended printf hook support. It is possible to use user-defined types
947 and extend existing format specifiers.
948 Implemented by Ulrich Drepper.
950 * Handling for group shadow files has been added.
951 Implemented by Ulrich Drepper.
953 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
954 servers (the case, e.g., for some people using the built-in DNS
955 server in ADSL modems/routers). There is a once-per-process timeout
956 in case of a broken server. To avoid it, users can run nscd or put
957 'options single-request' in /etc/resolv.conf.
958 Implemented by Ulrich Drepper.
962 * The following bugs are resolved with this release:
964 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
965 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
966 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
967 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
968 6968, 6974, 6980, 6995, 7008, 7009, 7029
970 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
971 up at the same time. Implemented by Ulrich Drepper.
973 * TLS descriptors for LD and GD on x86 and x86-64.
974 Implemented by Alexandre Oliva.
976 * getaddrinfo now handles DCCP and UDPlite.
977 Implemented by Ulrich Drepper.
979 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
980 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
981 Implemented by Ulrich Drepper.
983 * New implementation of memmem, strstr, and strcasestr which is O(n).
984 Implemented by Eric Blake.
986 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
988 * Implement "e" option for popen to open file descriptor with the
989 close-on-exec flag set. Implemented by Ulrich Drepper.
991 * Implement "b" mode for fmemopen. In this mode writes writes don't
992 implicitly add a NUL byte and seeks from the end of the buffer really
993 use the buffer end, not the string length as the basis.
994 Implemented by Ulrich Drepper.
996 * Many functions, exported and internal, now atomically set the close-on-exec
997 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
999 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1001 Implemented by Pravin Satpute.
1003 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1007 * The following bugs are resolved with this release:
1009 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1010 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1011 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1012 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1013 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1014 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1015 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1017 * New locales: bo_CN, bo_IN, shs_CA.
1019 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1021 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1022 Implemented by Pravin Satpute.
1024 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1026 * nscd caches now all timeouts for DNS entries
1027 Implemented by Ulrich Drepper.
1029 * nscd is more efficient and wakes up less often.
1030 Implemented by Ulrich Drepper.
1032 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1033 vdprintf, and obstack_vprintf.
1034 Implemented by Jakub Jelinek.
1036 * Faster memset for x86-64.
1037 Implemented by Harsha Jagasia and H.J. Lu.
1039 * Faster memcpy on x86.
1040 Implemented by Ulrich Drepper.
1042 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1043 Implemented by Ulrich Drepper.
1045 * Faster sqrt and sqrtf implemention for some PPC variants.
1046 Implemented by Steven Munroe.
1050 * The following bugs are resolved with this release:
1052 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1053 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1054 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1055 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1056 5071, 5103, 5104, 5112, 5113, 5184, 5186
1058 * More checking functions: fread, fread_unlocked, open*, mq_open.
1059 Implemented by Jakub Jelinek and Ulrich Drepper.
1061 * Extend fortification to C++. Implemented by Jakub Jelinek.
1063 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1064 by not recognizing 'a' as a modifier when those specs are requested.
1065 Implemented by Jakub Jelinek.
1067 * PPC optimizations to math and string functions.
1068 Implemented by Steven Munroe.
1070 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1071 options to be passed. Implemented by Ulrich Drepper.
1073 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1075 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1076 Implemented by Ulrich Drepper.
1078 * Handle private futexes in the NPTL implementation.
1079 Implemented by Jakub Jelinek and Ulrich Drepper.
1081 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1082 Implemented by Roland McGrath and Ulrich Drepper.
1084 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1086 * SHA-256 and SHA-512 based password encryption.
1087 Implemented by Ulrich Drepper.
1089 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1090 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1093 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1094 Implemented by Ulrich Drepper.
1098 * The following bugs are resolved with this release:
1100 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1101 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1102 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1103 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1104 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1105 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1106 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1109 * New Linux interfaces: epoll_pwait, sched_getcpu.
1111 * New generic interfaces: strerror_l.
1113 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1117 * The following bugs are resolved with this release:
1119 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1120 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1121 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1122 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1123 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1124 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1125 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1126 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1127 3225, 3251, 3252, 3253, 3273
1129 * For Linux, the sorting of addresses returned by getaddrinfo now also
1130 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1131 Implemented by Ulrich Drepper.
1133 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1134 Implemented by Ulrich Drepper.
1136 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1138 * New iconv module for MIK. Contributed by Alexander Shopov.
1140 * For sites with broken group and/or passwd database, the auto-propagate
1141 option of nscd can prevent creating ID lookup entries from the results
1142 of a name lookup and vice versa. This usually is no problem but some
1143 site might have problems with the default behavior.
1144 Implemented by Ulrich Drepper.
1146 * Iterating over entire database in NIS can be slow. With the
1147 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1148 to trade time for memory. The entire database will be read at once.
1149 Implemented by Ulrich Drepper.
1151 * The interfaces introduced in RFC 3542 have been implemented by
1154 * Support for the new ELF hash table format was added by Ulrich Drepper.
1156 * Support for priority inheritance mutexes added by Jakub Jelinek and
1159 * Support for priority protected mutexes added by Jakub Jelinek.
1161 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1162 or_IN, csb_PL, fy_NL, sr_ME.
1166 * More overflow detection functions.
1168 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1169 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1171 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1172 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1173 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1174 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1175 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1176 by Masahide Washizawa.
1178 * It is now possible to install audit libraries for the dynamic linker using
1179 LD_AUDIT. Implemented by Ulrich Drepper.
1181 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1182 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1183 For a libc and libpthread that works well on Linux 2.4 kernels, we
1184 recommend using the stable 2.3 branch.
1186 * The new function open_wmemstream acts like open_memstream,
1187 but uses a wchar_t wide character buffer.
1189 * The new function ppoll is an improved version of poll, similar to pselect.
1191 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1192 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1193 renameat, unlinkat, linkat, symlinkat, readlinkat.
1195 * New Linux kernel system calls: unshare,
1196 inotify_init, inotify_add_watch, inotify_rm_watch.
1198 * The euidaccess function is now also known by the alias eaccess,
1199 for compatibility with some other systems.
1201 * Timezone data updated to 2006b version.
1205 * The following bugs are resolved with this release:
1207 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1208 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1209 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1210 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1211 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1212 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1214 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1216 * As of this release, GCC 4 can be used to compile the C Library.
1218 * Timezone data updated to 2005m version.
1222 * The following bugs are resolved with this release:
1224 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1225 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1226 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1227 777, 787, 821, 822, 823, 825
1229 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1233 * Support for RFC 3678. Real implementations exist only for Linux so far.
1234 Implemented by Ulrich Drepper.
1236 * nscd can now cache entries persistently. Expiring entries are reloaded.
1237 For speedups the cache can be shared in memory with client processes.
1238 Implemented by Ulrich Drepper.
1240 * nscd can now perform SELinux checks.
1241 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1243 * getaddrinfo queries are now cached. Canonical name lookup is performed
1245 Implemented by Ulrich Drepper.
1247 * The nothrow function attribute is used when headers are used by gcc when
1248 compiling C code. This can avoid significant amounts of exception
1251 * The malloc functions perform more error checking and are stricter when
1252 it comes to reacting on errors. The default action is to terminate
1253 the process after showing an error message. Implemented by Ulrich Drepper.
1255 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1256 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1258 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1259 namespaces using the new function dlmopen(). This feature is of course,
1260 like most other dynamic loading functionality, not available in statically
1261 linked applications. Implemented by Ulrich Drepper.
1263 * Low-overhead boundary checking variants of string and some stdio functions
1264 were added. These are to be used in conjunction with a gcc patch by
1265 Jakub Jelinek which adds calls to these functions if possible.
1266 Implemented by Jakub Jelinek and Ulrich Drepper.
1268 * Old code for several operating systems and machine architectures that
1269 have not been in working condition in a long time have been removed from
1270 the main source tree maintained by the GNU C Library's maintainers.
1271 These files are now reside in the separate `ports' source module
1272 that is usable as an add-on when building the library.
1276 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1277 interrogate the dynamic linker, compatible with the Solaris interface.
1279 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1280 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1282 * getifaddrs now uses the netlink interface on Linux to get its information.
1283 Implemented by Thorsten Kukuk.
1285 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1286 Implemented by Ulrich Drepper.
1288 * support for non-executable stacks on x86 has been added. Changes mostly
1291 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1294 * getaddrinfo now performs destination address selection according to
1299 * Thread-safe interfaces for many functions that access locale data
1300 were added in version 2.3, but these features were omitted from NEWS.
1301 Many functions have variants with an `_l' suffix that take a `locale_t'
1302 object as a parameter rather than consulting the current locale.
1303 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1304 create and maintain `locale_t' objects. Additionally, the new function
1305 `uselocale' sets "the current locale" (as used by functions not so
1306 parameterized) set for an individual thread. These features were added
1307 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1309 * The functions getresuid, getresgid, setresuid, and setresgid, which
1310 have long been available on Linux, are now declared in <unistd.h>
1311 and are now also available on the Hurd.
1313 * ELF thread-local storage support (TLS) now works on x86-64.
1315 * The new dynamic string token $LIB is expanded in shared library names.
1316 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1318 * Aldy Hernandez contributed complete software floating point support for
1319 PowerPC machines with no FPU.
1321 * fexecve is implemented on Linux.
1323 * The `btowc' function should work at least twice as fast due to
1324 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1326 * With approriate thread add-ons cancelable functions are now implemented
1327 in libc.so as well. No need to call the function in libpthread. This
1328 change allowed to finally disable the incorrect and expensive handling
1329 of weak definition in ld.so.
1331 * Yet more PLT entries in libc.so have been removed. We finally arrived
1332 at the bare minimum. Startup times improved appropriately.
1334 * Support for the new Linux/x86 system call interface was added. The
1335 AT_SYSINFO auxiliary vector entry is recognized and handled.
1339 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1342 * iconv (the program and the interface) now accepts empty names (excluding
1343 options like //TRANSLIT) to mean "use charset of current locale".
1345 * localedef can now transliterate characters in strings which are not in
1346 the provided charmap. The information from the input locale is used.
1348 * Prelinking support was added for ELF targets. This requires additional
1349 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1351 * Read-only stdio streams now use mmap to speed up operation by eliminating
1352 copying and buffer underflows. To use add 'm' to the mode string of
1353 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1355 * The malloc functions were completely rewritten by Wolfram Gloger based
1356 on Doug Lea's malloc-2.7.0.c.
1358 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1359 implementation of regex.
1361 * Bruno Haible upgraded the iconv and locale implementation to support
1364 * Contents of the LC_* and LANG environment variables in the CEN style are
1365 not recognized anymore. It never was used. Change by Ulrich Drepper.
1367 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1368 thread-local storage (TLS) ABI on some platforms.
1369 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1371 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1372 EUC-JISX0213, and TSCII.
1374 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1375 BSD-compatible interface for getting all network interface addresses.
1376 Implementation for IPv4 by Roland McGrath.
1378 * Loading of locale data is faster due to the introduction of a locale
1379 archive. Implemented by Roland McGrath and Ulrich Drepper.
1381 * Startup times are significantly reduced by not using exported functions
1382 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1385 * Steven Munroe contributed a port to PowerPC64/Linux.
1389 * The Hurd now uses the GNU libio implementation of stdio rather than the
1390 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1392 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1393 with the same behavior as the Linux system call of the same name.
1397 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1398 128-bit long double format.
1400 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1401 IBM1161, and IBM1162 charsets.
1403 * Andreas Jaeger contributed a port to x86-64/Linux.
1405 * Peter Bruin contributed a port to PowerPC/Hurd.
1407 * libc functions using I/O streams now can handle wide-oriented streams
1410 * optimizations in the dynamic linker. Binaries created by recent binutils
1411 versions start up quicker due to reduced time spent on relocations.
1413 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1417 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1418 asinh, atanh, j0 for the 128-bit long double format.
1420 * Bruno Haible updated all the code handling Unicode in some form to
1421 support Unicode 3.1.
1423 * Speed of regex for single-byte locales is back to previous levels.
1424 Patch by Isamu Hasegawa.
1426 * Alpha, SPARC, and IA-64 now also using floating stacks.
1428 * Startup time of internationalized applications greatly improved through
1429 iconv cache. Use iconvconfig to generate the cache file.
1430 Contributed by Ulrich Drepper.
1432 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1433 severe performance problems. Patch by David Mosberger.
1435 * The Hurd port got a lot more functionality like AIO, various stdio
1436 extensions, etc. Mainly done by Roland McGrath.
1438 * mtrace can now lookup symbols in shared libraries.
1442 * Intel's IA-64 math library is largely integrated. It provides fast and
1443 accurate implementatations for most basic and standard math functions
1444 in float, double, and long double format.
1446 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1447 and asin for the 96-bit long double format and asin, log, tan for the
1448 128-bit long double format.
1450 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1451 The basic double functions exist today. Contributed by Abraham Ziv
1452 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1453 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1455 * An asynchronous name lookup library was added. The interface is designed
1456 after POSIX AIO. The proposal was circulated beforehand to get comments.
1457 No negative ones came in. Implemented by Ulrich Drepper.
1459 * Port to S390/64bit contributed by Martin Schwidefsky
1460 <schwidefsky@de.ibm.com>.
1462 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1463 of functions for Linux/IA-64.
1465 * The RPC code is now thread safe. Threads can now use the same service
1466 of different services at the same time. Patch by Eric Norum
1467 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1469 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1470 family of functions for Linux/S390.
1472 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1473 of functions for Linux/x86.
1475 * Port to Linux/CRIS contributed by Axis Communications.
1479 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1480 we can now check for namespace violations and missing declarations. The
1481 result is that almost all headers are now Unix-compliant (as defined in
1482 the upcoming XPG6). The negative side is that some programs might need
1483 corrections, too, if they depend on the incorrect form of the headers in
1484 previous versions which defined too many symbols and included too many
1487 * regex now handles multibyte character sets correctly.
1488 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1490 * iconv (the program) does now conform to the upcoming XPG6 and handles
1491 charmaps. Instead of the charset names the path of charmaps can be
1492 provided and the conversion happens based on this data.
1493 Contributed by Ulrich Drepper.
1495 * The locale program now provides detailed information about the installed
1500 only lists the names of the supported locales
1504 provides details such as country, language, and codeset name.
1505 Contributed by Ulrich Drepper.
1509 * The gencat program now parses the input file according to the charset
1510 selected by the LC_CTYPE category. This is important for stateful
1511 character sets. To make generating catalogs easier there is a way
1512 to overwrite the charset selected by the locale: before the first
1513 message or $ quote line the catalog can contain a line like
1515 $ codeset=ISO-8859-2
1517 to select the charset (ISO-8859-2 in this case).
1519 Implemented by Shinya Hanataka and Ulrich Drepper.
1521 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1522 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1523 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1525 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1526 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1528 * The LANGUAGE environment variable is now ignored unless the locale is
1529 changed from the default "C" locale.
1531 * The usual bug fixes.
1535 * Greg McGary added runtime support for bounds checking using gcc's
1536 new -fbounded-pointers option. ix86 target is complete. PowerPC
1539 * Thorsten Kukuk added secure mode support to nscd.
1541 * The Berkeley db libraries have been removed.
1543 Related, the nss_db module is now in a separate package since it
1544 obviously requires a database library being available.
1546 * Wide character I/O streams implemented by Ulrich Drepper.
1548 * Functions from the extended socket API added by Ulrich Drepper.
1550 * Functions feenableexcept and fedisableexcept to control the
1551 behaviour of individual exceptions have been added by Andreas Jaeger.
1553 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1555 * The resolver code has been updated from bind 8.2.3-T5B which supports
1556 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1559 This change could in some situations effect backward compatibility. Since
1560 now `_res' is a thread-local instead of a global variable, modifying it
1561 in one thread does not have any effect in other threads.
1563 The resolver library was also extended to allow IPv6 as the transport
1564 protocol for the requests. This work was done by Stig Venaas.
1566 * Compatibility code for K&R C compilers has been removed from the
1567 header files. A ISO C compiler is needed to use the library
1568 (conforming to either C89 or C99 standard).
1570 * Complete rewrite of the localedef program to support multibyte character
1571 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1572 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1573 Implemented by Ulrich Drepper.
1575 Bruno Haible significantly improved the generation and use of the data
1576 structures for the wide character tables.
1578 * Plural handling in gettext implemented by Ulrich Drepper.
1580 * The utmp daemon has been removed.
1582 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1584 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1587 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1589 * POSIX barriers implemented by Kaz Kylheku.
1591 * POSIX spawn function family implemented by Ulrich Drepper.
1593 * POSIX spinlocks are now available.
1595 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1597 * the configure option --enable-kernel=X.Y.Z allows to strip out
1598 compatibility for kernel versions before X.Y.Z. This is currently only
1599 implemented for Linux.
1601 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1602 field sin6_scope_id. This means that all programs using IPv6 should be
1603 recompiled. Don't expect binary compatibility with previous glibc
1606 * various conversion modules for IBM character sets contributed by
1609 * IA-64 port by Jes Sorensen and HJ Lu.
1623 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1625 * New xdr functions are added; some rpc functions are now 64bit clean.
1627 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1629 * Fixed known incompatibilities with glibc 2.0.
1631 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1633 * Optimized a number of functions (especially the ELF dynamic loader).
1635 * Update timezone data files.
1637 * lots of charmaps corrections
1639 * some new locale definitions and charmaps
1644 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1645 conform to POSIX member type requirements. Symbol versions have been
1646 adjusted as needed within the library, and for direct use by applications,
1647 but there is potential for problems if third-party libraries use
1648 struct timeval as part of their interface. This does not present
1649 a problem for X and other "essential" system libraries.
1651 * An additional locale model to support C++ Standard Library locale
1652 model and probably more was implemented by Ulrich Drepper.
1654 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1657 * Miles Bader provided the `argp' function family to support hierachical
1658 command line argument parsing, layered on top of getopt.
1660 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1662 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1665 * scanf recognizes the %a and %A format for scanning floating point numbers.
1667 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1668 information and interfaces for the available integer types.
1670 * about 130 new math functions were added to implement the ISO C9x math
1673 * the new header <complex.h> contains definitions of the complex math
1674 functions from ISO C 9X.
1676 * the new header <tgmath.h> defines generic macros to use complex or
1677 real valued functions.
1679 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1681 * Andreas Jaeger provided a test suite for the math library.
1683 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1685 * Ulrich Drepper added character set conversion functions (iconv).
1687 * Optimized string functions have been added.
1689 * The localedata addon is now part of glibc.
1691 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1693 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1694 daemon for NSS (nscd).
1696 Missing a better place here are some numbers on improvements. Under
1697 Linux 2.1.125 un-tar-ing the kernel sources takes
1701 using local files 12.19s 6.88s 22.91s
1703 using NIS 13.92s 8.91s 26.34s
1705 using NIS & nscd 10.37s 7.34s 25.30s
1707 using NIS+ 27.57s 30.37s 640.46s
1709 using NIS+ & nscd 10.25s 7.83s 26.51s
1711 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1713 Keep in mind that non-namelookup related operations dominate above times.
1714 It was just a common complain that using NIS+ unpacking the kernel is
1717 [1] The old nscd implementation is not available anymore since it was
1718 distributed with glibc up to version 2.0.98 and thus is now replaced.
1720 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1722 * Mark Kettenis provided a Hesiod NSS module.
1724 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1725 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1727 * rcmd can now handle netgroups (Dick Streefland).
1729 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1732 * Support for the IPv6 protocol has been added to the socket API, as per the
1733 latest draft standards.
1735 * Support for Linux 2.2 has been added.
1737 * Interface changes relative to the latest 2.0.x release:
1738 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1739 addseverity NEW: Unix98
1740 alphasort64 NEW: LFS
1741 argp_err_exit_status NEW: argp, GNU ext
1742 argp_error NEW: argp, GNU ext
1743 argp_failure NEW: argp, GNU ext
1744 argp_help NEW: argp, GNU ext
1745 argp_parse NEW: argp, GNU ext
1746 argp_program_bug_address NEW: argp, GNU ext
1747 argp_program_version NEW: argp, GNU ext
1748 argp_program_version_hook NEW: argp, GNU ext
1749 argp_state_help NEW: argp, GNU ext
1750 argp_usage NEW: argp, GNU ext
1751 authdes_create NEW: Secure RPC
1752 authdes_getucred NEW: Secure RPC
1753 authdes_pk_create NEW: Secure RPC
1754 backtrace NEW: GNU ext.
1755 backtrace_symbols NEW: GNU ext.
1756 backtrace_symbols_fd NEW: GNU ext.
1758 cacosf NEW: ISO C 9x
1759 cacosh NEW: ISO C 9x
1760 cacoshf NEW: ISO C 9x
1761 cacoshl NEW: ISO C 9x
1762 cacosl NEW: ISO C 9x
1769 casinf NEW: ISO C 9x
1770 casinh NEW: ISO C 9x
1771 casinhf NEW: ISO C 9x
1772 casinhl NEW: ISO C 9x
1773 casinl NEW: ISO C 9x
1775 catanf NEW: ISO C 9x
1776 catanh NEW: ISO C 9x
1777 catanhf NEW: ISO C 9x
1778 catanhl NEW: ISO C 9x
1779 catanl NEW: ISO C 9x
1780 cbc_crypt NEW: Secure RPC
1784 ccoshf NEW: ISO C 9x
1785 ccoshl NEW: ISO C 9x
1791 cimagf NEW: ISO C 9x
1792 cimagl NEW: ISO C 9x
1793 clearerr_locked REMOVED
1794 clntunix_create NEW: sunrpc ext
1796 clog10 NEW: ISO C 9x
1797 clog10f NEW: ISO C 9x
1798 clog10l NEW: ISO C 9x
1808 cprojf NEW: ISO C 9x
1809 cprojl NEW: ISO C 9x
1811 crealf NEW: ISO C 9x
1812 creall NEW: ISO C 9x
1817 csinhf NEW: ISO C 9x
1818 csinhl NEW: ISO C 9x
1821 csqrtf NEW: ISO C 9x
1822 csqrtl NEW: ISO C 9x
1826 ctanhf NEW: ISO C 9x
1827 ctanhl NEW: ISO C 9x
1829 des_setparity NEW: Secure RPC
1830 ecb_crypt NEW: Secure RPC
1831 endutxent NEW: Unix98
1833 exp10f NEW: ISO C 9x
1834 exp10l NEW: ISO C 9x
1838 fattach NEW: STREAMS
1839 fdetach NEW: STREAMS
1843 feclearexcept NEW: ISO C 9x
1844 fegetenv NEW: ISO C 9x
1845 fegetexceptflag NEW: ISO C 9x
1846 fegetround NEW: ISO C 9x
1847 feholdexcept NEW: ISO C 9x
1849 feraiseexcept NEW: ISO C 9x
1850 ferror_locked REMOVED
1851 fesetenv NEW: ISO C 9x
1852 fesetexceptflag NEW: ISO C 9x
1853 fesetround NEW: ISO C 9x
1854 fetestexcept NEW: ISO C 9x
1855 feupdateenv NEW: ISO C 9x
1856 fflush_locked REMOVED
1860 fgets_unlocked NEW: GNU ext.
1861 fileno_locked REMOVED
1873 fputc_locked REMOVED
1874 fputs_unlocked NEW: GNU ext.
1875 fread_unlocked NEW: GNU ext.
1880 fstatvfs NEW: Unix98
1884 ftruncate64 NEW: LFS
1886 fwrite_unlocked NEW: GNU ext.
1887 gai_strerror NEW: IPv6
1891 getchar_locked REMOVED
1893 getdate_err NEW: Unix98
1894 getdate_r NEW: GNU ext.
1896 getnameinfo NEW: IPv6
1897 getnetname NEW: Secure RPC
1898 getpmsg NEW: STREAMS
1899 getpt NEW: Unix98 PTY
1900 getrlimit64 NEW: LFS
1901 getutxent NEW: Unix98
1902 getutxid NEW: Unix98
1903 getutxline NEW: Unix98
1904 glob64 NEW: GNU ext.
1905 globfree64 NEW: GNU ext.
1906 gnu_get_libc_release NEW: GNU ext.
1907 gnu_get_libc_version NEW: GNU ext.
1908 grantpt NEW: Unix98 PTY
1909 host2netname NEW: Secure RPC
1911 iconv_close NEW: iconv
1912 iconv_open NEW: iconv
1913 if_freenameindex NEW: IPv6
1914 if_indextoname NEW: IPv6
1915 if_nameindex NEW: IPv6
1916 if_nametoindex NEW: IPv6
1917 in6addr_any NEW: IPv6
1918 in6addr_loopback NEW: IPv6
1919 inet6_isipv4mapped NEW: IPv6
1920 isastream NEW: STREAMS
1921 iswblank NEW: GNU ext.
1922 key_decryptsession NEW: Secure RPC
1923 key_decryptsession_pk NEW: Secure RPC
1924 key_encryptsession NEW: Secure RPC
1925 key_encryptsession_pk NEW: Secure RPC
1926 key_gendes NEW: Secure RPC
1927 key_get_conv NEW: Secure RPC
1928 key_secretkey_is_set NEW: Secure RPC
1929 key_setnet NEW: Secure RPC
1930 key_setsecret NEW: Secure RPC
1931 llrint NEW: ISO C 9x
1932 llrintf NEW: ISO C 9x
1933 llrintl NEW: ISO C 9x
1934 llround NEW: ISO C 9x
1935 llroundf NEW: ISO C 9x
1936 llroundl NEW: ISO C 9x
1941 lrintf NEW: ISO C 9x
1942 lrintl NEW: ISO C 9x
1943 lround NEW: ISO C 9x
1944 lroundf NEW: ISO C 9x
1945 lroundl NEW: ISO C 9x
1947 makecontext NEW: Unix98
1948 mempcpy NEW: GNU ext.
1951 modify_ldt NEW: kernel
1955 nearbyint NEW: ISO C 9x
1956 nearbyintf NEW: ISO C 9x
1957 nearbyintl NEW: ISO C 9x
1958 netname2host NEW: Secure RPC
1959 netname2user NEW: Secure RPC
1960 nexttoward NEW: ISO C 9x
1961 nexttowardf NEW: ISO C 9x
1962 nexttowardl NEW: ISO C 9x
1966 passwd2des NEW: Secure RPC
1968 pow10f NEW: GNU ext.
1969 pow10l NEW: GNU ext.
1972 printf_size NEW: GNU ext.
1973 printf_size_info NEW: GNU ext.
1974 profil_counter REMOVED
1975 pthread_mutexattr_getkind_np REPLACED
1976 pthread_mutexattr_setkind_np REPLACED
1977 ptsname NEW: Unix98 PTY
1978 ptsname_r NEW: Unix98 PTY
1980 putchar_locked REMOVED
1981 putgrent NEW: GNU ext.
1983 putpmsg NEW: STREAMS
1984 pututxline NEW: Unix98
1988 readdir64_r NEW: LFS
1989 remquo NEW: ISO C 9x
1990 remquof NEW: ISO C 9x
1991 remquol NEW: ISO C 9x
1993 roundf NEW: ISO C 9x
1994 roundl NEW: ISO C 9x
1996 scalbln NEW: ISO C 9x
1997 scalblnf NEW: ISO C 9x
1998 scalblnl NEW: ISO C 9x
2000 sendfile NEW: kernel
2001 setcontext NEW: Unix98
2002 setrlimit64 NEW: LFS
2003 setutxent NEW: Unix98
2005 sigignore NEW: Unix98
2006 sigqueue NEW: POSIX.1b
2007 sigrelse NEW: Unix98
2008 sigset NEW: POSIX.1b
2009 sigtimedwait NEW: POSIX.1b
2010 sigwaitinfo NEW: POSIX.1b
2011 sincos NEW: GNU ext.
2012 sincosf NEW: GNU ext.
2013 sincosl NEW: GNU ext.
2017 strcasestr NEW: GNU ext.
2018 strtoimax NEW: ISO C 9x
2019 strtoumax NEW: ISO C 9x
2020 strverscmp NEW: GNU ext.
2021 svcauthdes_stats NEW: Secure RPC
2022 svcunix_create NEW: sunrpc etx
2023 svcunixfd_create NEW: sunrpc ext
2024 swapcontext NEW: Unix98
2025 tcgetsid NEW: Unix98 PTY
2026 tdestroy NEW: GNU ext.
2027 tgamma NEW: ISO C 9x
2028 tgammaf NEW: ISO C 9x
2029 tgammal NEW: ISO C 9x
2033 truncf NEW: ISO C 9x
2034 truncl NEW: ISO C 9x
2036 unlockpt NEW: Unix98 PTY
2037 updwtmpx NEW: Unix98
2038 user2netname NEW: Secure RPC
2039 utmpxname NEW: Unix98
2040 versionsort NEW: GNU ext.
2041 versionsort64 NEW: GNU ext.
2043 wcscasecmp NEW: GNU ext.
2044 wcsncasecmp NEW: GNU ext.
2045 wcsnlen NEW: GNU ext.
2046 wcstoimax NEW: ISO C 9x
2047 wcstoll NEW: ISO C 9x
2048 wcstoull NEW: ISO C 9x
2049 wcstoumax NEW: ISO C 9x
2051 wordexp NEW: POSIX.2
2052 wordfree NEW: POSIX.2
2053 write_profiling REMOVED
2054 xdecrypt NEW: Secure RPC
2055 xdr_authdes_cred NEW: Secure RPC
2056 xdr_authdes_verf NEW: Secure RPC
2057 xdr_cryptkeyarg NEW: Secure RPC
2058 xdr_cryptkeyarg2 NEW: Secure RPC
2059 xdr_cryptkeyres NEW: Secure RPC
2060 xdr_getcredres NEW: Secure RPC
2061 xdr_key_netstarg NEW: Secure RPC
2062 xdr_key_netstres NEW: Secure RPC
2063 xdr_keybuf NEW: Secure RPC
2064 xdr_keystatus NEW: Secure RPC
2065 xdr_netnamestr NEW: Secure RPC
2066 xdr_sizeof NEW: Secure RPC
2067 xdr_unixcred NEW: sunrpc ext
2068 xencrypt NEW: Secure RPC
2069 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2080 * inet_ntoa is thread-safe
2082 * updwtmp is moved from libutil to libc
2084 * rewrite of cbrt function
2086 * update of timezone data
2100 * add atoll function
2102 * fix complex problems in Berkeley DB code
2104 * fix math functions
2108 * fixed lots of header problems (especially Linux/GNU specific)
2110 * dynamic loader preserves all registers
2112 * Roland McGrath provided support for handling of auxiliary objects in
2113 the ELF dynamic loader.
2115 * support for parallel builds is improved
2119 * GNU extensions are no longer declared by default. To enable them you
2120 must define the macro `_GNU_SOURCE' in your program or compile with
2123 * The library has changed from using GNU ld symbol aliases to using weak
2124 symbols where available. The ELF object file format supports weak
2125 symbols; GNU ld also supports weak symbols in the a.out format. (There
2126 is also now support for other GNU ld extensions in ELF. Use the
2127 `--with-elf' option to configure to indicate you have ELF, and
2128 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2129 of many files which contained only symbol aliases, reducing the size of
2130 the source and the compiled library; many other files were renamed to
2131 less cryptic names previously occupied by the symbol alias files.
2132 There is a new header file <elf.h> for programs which operate on
2133 files in the ELF format.
2135 * Converted to Autoconf version 2, so `configure' has more options.
2136 Run `configure --help' to see the details.
2138 * The library can now be configured to build profiling, highly-optimized
2139 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2140 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2141 `configure' enable building these extra libraries. The shared library is
2142 built by default when using both ELF and GNU ld. When shared libraries
2143 are enabled, the new library `-ldl' is available for arbitrary run-time
2144 loading of shared objects; its interface is defined in <dlfcn.h>. The
2145 new header file <link.h> gives access to the internals of the run-time
2146 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2147 application of same name on other systems and it provides information
2148 about dynamically linked binaries.
2150 * The C library now provides the run-time support code for profiling
2151 executables compiled with `-pg'. Programs can control the profiling code
2152 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2153 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2154 the support for this file format was contributed by David Mosberger-Tang.
2156 * The math code has been replaced with a math library based on fdlibm from
2157 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2158 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2159 functions. The math functions now reside in a separate library, so
2160 programs using them will need to use `-lm' their linking commands.
2162 * John C. Bowman contributed optimized ix87 assembler inline functions.
2164 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2165 mechanism similar to that found in Solaris 2. This is now used for the
2166 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2167 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2168 file controls what services are used for each individual database. This
2169 works by loading shared libraries with names specified in `nsswitch.conf',
2170 so service modules can be changed or added at any time without even
2171 relinking any program. Currently there are the file, db, and NIS based
2172 NSS services available.
2174 * The new functions `strtoq' and `strtouq' parse integer values from
2175 strings, like `strtol' and `strtoul', but they return `long long int' and
2176 `unsigned long long int' values, respectively (64-bit quantities).
2178 * The new functions `strtof' and `strtold' parse floating-point values from
2179 strings, like `strtod', but they return `float' and `long double' values,
2180 respectively (on some machines `double' and `long double' are the same).
2182 * Ulrich Drepper has contributed new implementations of the floating-point
2183 printing and reading code used in the `printf' family of functions and
2184 `strtod', `strtof', and `strtold'. These new functions are perfectly
2185 accurate, and much faster than the old ones.
2187 * The implementation of the POSIX locale model was completely rewritten by
2188 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2189 to compile the POSIX locale definition.
2191 * The former dummy implementations of the strcoll and strxfrm function are
2192 now replaced by fully functional code contributed by Ulrich Drepper. The
2193 collation information comes from the POSIX locale definitions.
2195 * The new header <langinfo.h> defines an interface for accessing
2196 various locale-dependent data (using the locale chosen with `setlocale').
2198 * Ulrich Drepper has contributed a new suite of functions for operation on
2199 wide-character and multibyte-character strings, in <wchar.h>;
2200 and classification and case conversion of wide characters, in <wctype.h>.
2201 These new functions are conforming to the ISO C, Amendement 1 specification.
2203 * There is now a second implementation of the standard I/O library available.
2204 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2205 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2207 * You can now use positional parameter specifications in format strings
2208 for the `printf' and `scanf' families of functions. For example,
2209 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2210 ``Number 6, Mr Jones''. This is mainly useful when providing different
2211 format strings for different languages, whose grammars may dictate
2212 different orderings of the values being printed. To support this
2213 feature, the interface for `register_printf_handler' has changed; see
2214 the header file <printf.h> for details.
2216 * The `printf' and `scanf' families of functions now understand a new
2217 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2218 to group numbers as indicated by the locale; for `scanf' and friends, this
2219 says to accept as valid only a number with all the proper grouping
2220 separators in the right places. In the default "C" locale, numbers are
2221 not grouped; but locales for specific countries will define the usual
2222 conventions (i.e. separate thousands with `,' in the US locale).
2224 * The pgrp functions have been regularized, slightly incompatibly but much
2225 less confusingly. The core functions are now `getpgid' and `setpgid',
2226 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2227 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2228 provided for compatibility. There is no longer an incompatible `getpgrp'
2229 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2231 * The new header file <fts.h> and suite of functions simplify programs that
2232 operate on directory trees. This code comes from 4.4 BSD.
2234 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2235 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2236 NSS scheme used in glibc.
2238 * There is a new malloc debugging hook `__memalign_hook'.
2240 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2241 `unsigned int' in <sys/types.h>. These are for compatibility only and
2242 their use is discouraged.
2244 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2245 done differently, so that it works even without GNU ld.
2247 * New function `euidaccess' checks allowed access to a file like `access',
2248 but using the effective IDs instead of the real IDs.
2250 * The time zone data files have been updated for the latest and greatest
2251 local time conventions of the countries of the world.
2253 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2256 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2257 for formatting floating-point numbers. They are provided only for
2258 compatibility; new programs should use `sprintf' instead. There are
2259 also equivalent function for the `long double' floating-point type and
2260 all functions also exist in a reentrant form.
2262 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2263 functions for maintaining the login-record files (primarily of use to
2264 system programs such as `login'), and convenient functions for
2265 allocating and initializing a pseudo-terminal (pty) device.
2267 * Ulrich Drepper has contributed new support for System V style
2268 shared memory and IPC on systems that support it.
2270 * Ulrich Drepper has contributed several miscellaneous new functions found
2271 in System V: The `hsearch' family of functions provide an effective
2272 implementation of hash tables; `a64l' and `l64a' provide a very simple
2273 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2276 * Ulrich Drepper has contributed new reentrant counterparts for the
2277 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2279 * Ulrich Drepper has contributed new, highly-optimized versions of several
2280 string functions for the i486/Pentium family of processors.
2282 * Ulrich Drepper has updated the Linux-specific code, based largely
2283 on work done in Hongjiu Lu's version of GNU libc for Linux.
2284 The GNU library now supports Linux versions 2.0.10 and later,
2285 using the ELF object file format (i[3456]86-*-linux).
2287 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2289 * David Mosberger-Tang and Richard Henderson have ported the C library
2290 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2291 dynamic linking support for ELF/Alpha.
2293 * Richard Henderson contributed several Alpha optimized assembler function
2294 for arithmetic and string handling.
2296 * Ulrich Drepper has contributed a new set of message catalog functions to
2297 support multiple languages using the <libintl.h> interface, for use with
2298 his new package GNU gettext. Translation volunteers have contributed
2299 catalogs of the library's messages in Spanish, German, and Korean.
2301 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2302 program and the `catgets' function for reading the catalog files it
2303 creates. (The <libintl.h> interface is preferred; we include the
2304 <nl_types.h> interface using `catgets' only for source compatibility with
2305 programs already written to use it.)
2307 * New header file <values.h> gives SVID-compatible names for <limits.h>
2310 * Various new macros, declarations, and small header files for compatibility
2313 * New function `group_member' is a convenient way to check if a process has
2314 a given effective group ID.
2316 * When using GCC 2.7 and later, the socket functions are now declared in a
2317 special way so that passing an argument of type `struct sockaddr_in *',
2318 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2319 `struct sockaddr *' type, does not generate a type-clash warning.
2321 * New function `error' declared in header file <error.h> is a convenient
2322 function for printing error messages and optionally exiting; this is the
2323 canonical function used in GNU programs. The new functions `err', `warn',
2324 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2325 doing the same thing.
2327 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2328 POSIX.2 `glob' function to do ~ and {...} expansion.
2330 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2331 `clearenv' which is used in POSIX.9 is also available.
2333 * New function `getsid' returns session ID number on systems that support it.
2335 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2336 files <db.h> and <mpool.h> provide a rich set of functions for several
2337 types of simple databases stored in memory and in files, and <ndbm.h> is
2338 an old `ndbm'-compatible interface using the `db' functions. Link with
2339 `-ldb' to get these functions.
2341 * New macro `strdupa' copies a string like `strdup', but uses local stack
2342 space from `alloca' instead of dynamic heap space from `malloc'.
2344 * New function `strnlen' is like `strlen' but searches only a given maximum
2345 number of characters for the null terminator. `stpncpy', `strndup' and
2346 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2349 * New function `statfs' in header <sys/statfs.h>.
2351 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2352 provide convenient functions for operating on blocks of null-terminated
2355 * A new suite of functions in <utmp.h> handle all the details of reading
2356 and writing the utmp file.
2358 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2361 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2362 completely POSIX compliant and also implemented the extended functionality
2363 to handle alternate digit representation and alternate era date formats.
2365 * Ulrich Drepper provided an implementation of the `strptime' function
2366 defined in XPG4.2 which transforms a string into a `struct tm' value.
2368 * Paul Eggert provided the tzselect shell script as part of the timezone
2369 code. The shell script makes it easy to select the correct timezone
2372 * The implementation of the malloc family of functions is completely replaced
2373 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2374 The implementation uses the mmap function (if available) and it is
2375 optimized for the use in multi threaded programs.
2377 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2378 functions. This new functionality is usable by specifying a special
2379 salt string and it is compatible with implementation on *BSD systems.
2381 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2382 `getsubopt' to handle second level command line options, `bsd_signal'
2383 to access BSD style `signal' functionality, the obsolete `regexp' style
2386 * the `lchown' function is available on system which support this
2389 * The implementation of the shadow password handling function was contributed
2392 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2394 * POSIX.1g support was added. The <sys/select.h> header is available,
2395 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2396 implementation of `getaddrinfo'.
2400 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2402 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2403 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2405 * The new function `daemon' from 4.4 BSD is useful for server programs that
2406 want to put themselves in the background.
2408 * Joel Sherrill has contributed support for several standalone boards that
2409 run without an operating system.
2411 * `printf', `scanf' and friends now accept a `q' type modifier for long
2412 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2414 * All of the code taken from BSD (notably most of the math and networking
2415 routines) has been updated from the BSD 4.4-Lite release.
2417 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2419 * The new functions `getdomainname' and `setdomainname' fetch or change the
2420 YP/NIS domain name. These are system calls which exist on systems which
2423 * The time zone data files have been updated for the latest international
2426 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2427 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2431 * The C library now includes support for Sun RPC, from Sun's free
2432 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2433 are included. (There is still no support for YP.)
2435 * Tom Quinn has contributed a port of the C library to SGI machines running
2436 Irix 4 (mips-sgi-irix4).
2438 * The new `lockf' function is a simplified interface to the locking
2439 facilities of `fcntl', included for compatibility.
2441 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2443 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2445 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2448 * The error message printed by `assert' for a failed assertion now includes
2449 the name of the program (if using GNU ld) and the name of the calling
2450 function (with versions of GCC that support this).
2452 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2454 * The library now includes the <sys/mman.h> header file and memory
2455 management functions `mmap', `munmap', `mprotect', `msync', and
2456 `madvise', on systems that support those facilities.
2458 * The interface for `mcheck' has changed slightly: the function called to
2459 abort the program when an allocation inconsistency is detected now takes
2460 an argument that indicates the type of failure. The new function
2461 `mprobe' lets you request a consistency check for a particular block at
2462 any time (checks are normally done only when you call `free' or `realloc'
2465 * It is now possible to easily cross-compile the C library, building on one
2466 system a library to run on another machine and/or operating system. All
2467 you need to do is set the variable `HOST_CC' in `configparms' to the
2468 native compiler for programs to run on the machine you are building on (a
2469 few generator programs are used on Unix systems); set `CC' to the
2472 * The new function `fexecve' (only implemented on the GNU system) executes
2473 a program file given a file descriptor already open on the file.
2477 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2478 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2480 * You can set the variable `libprefix' in `configparms' to specify a prefix
2481 to be prepended to installed library files; this makes it easy to install
2482 the GNU C library to be linked as `-lgnuc' or whatever.
2484 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2485 copies a limited number of characters from a string, and returns the
2486 address of the last character written.
2488 * You no longer need to check for whether the installed `stddef.h' is
2489 compatible with the GNU C library. configure now checks for you.
2491 * You can now define a per-stream `fileno' function to convert the
2492 stream's cookie into an integral file descriptor.
2494 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2495 allocates zero bytes of storage, and returns a unique pointer which
2496 you can pass to `realloc' or `free'. The behavior is undefined if
2497 you dereference this pointer.
2499 * The C library now runs on Sony NEWS m68k machines running either
2500 NewsOS 3 or NewsOS 4.
2502 * The new `syscall' function is a system-dependent primitive function
2503 for invoking system calls. It has the canonical behavior on Unix
2504 systems, including unreliable return values for some calls (such as
2505 `pipe', `fork' and `getppid').
2507 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2508 to `EAGAIN', which is the preferred name. On systems whose kernels
2509 use two distinct codes, the C library now translates EWOULDBLOCK to
2510 EAGAIN in every system call function.
2514 * The GNU C Library Reference Manual is now distributed with the library.
2515 `make dvi' will produce a DVI file of the printed manual.
2516 `make info' will produce Info files that you can read on line using C-h i
2517 in Emacs or the `info' program.
2518 Please send comments on the manual to bug-glibc-manual@gnu.org.
2520 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2522 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2524 * Jason Merrill has contributed a port to the Sequent Symmetry running
2525 Dynix version 3 (i386-sequent-dynix).
2527 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2528 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2530 * New function `memory_warnings' lets you arrange to get warnings when
2531 malloc is running out of memory to allocate, like Emacs gives you.
2533 * The C library now contains the relocating allocator used in Emacs 19 for
2534 its editing buffers. This allocator (ralloc) minimizes allocation
2535 overhead and fragmentation by moving allocated regions around whenever it
2536 needs to. You always refer to a ralloc'd region with a "handle" (a
2537 pointer to a pointer--an object of type `void **').
2539 * There is a new `printf' format: `%m' gives you the string corresponding
2540 to the error code in `errno'.
2542 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2543 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2544 pass, the `a' modifier says to fill in a `char **' you pass with a
2547 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2548 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2549 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2551 * `mkstemp' is a traditional Unix function to atomically create and open a
2552 uniquely-named temporary file.
2556 * The standard location for the file that says what the local timezone is
2557 has changed again. It is now `/usr/local/etc/localtime' (or more
2558 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2560 * The distribution no longer contains any files with names longer than 14
2563 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2564 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2566 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2570 * The configuration process has changed quite a bit. The `configure'
2571 script is now used just like the configuration scripts for other GNU
2572 packages. The `sysdeps' directory hierarchy is much rearranged.
2573 The file `INSTALL' explains the new scheme in detail.
2575 * The header files no longer need to be processed into ANSI C and
2576 traditional C versions. There is just one set of files to install, and
2577 it will work with ANSI or old C compilers (including `gcc -traditional').
2579 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2580 MIPS DECStation running Ultrix 4.
2582 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2583 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2584 made itself into a shared library.
2586 * Yet further improved support for the i386, running 4.3 BSD-like systems
2587 (such as Mach 3 with the Unix single-server), or System V.
2589 * New function `strncasecmp' to do case-insensitive string comparison
2590 with limited length.
2592 * New function `strsep' is a reentrant alternative to `strtok'.
2594 * New functions `scandir' and `alphasort' for searching directories.
2596 * New function `setenv' is a better interface to `putenv'.
2598 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2599 function for traversing a directory tree.
2601 * The GNU obstack package is now also part of the C library.
2602 The new function `open_obstack_stream' creates a stdio stream that
2603 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2604 formatted output directly to an obstack.
2606 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2607 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2609 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2611 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2612 things to your strings.
2614 * There are some new test programs: test-fseek, testmb, and testrand.
2616 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2617 These ports are not finished, but are a good starting place for really
2618 supporting those systems.
2620 * `/etc/localtime' is now the standard location for the file that says what
2621 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2622 This follows the general principle that `/etc' is the place for all local
2623 configuration files.
2625 * The C library header files now use `extern "C"' when used by the C++
2626 compiler, so the C library should now work with C++ code.
2628 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2629 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2632 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2633 function which uses the `merge sort' algorithm, and is said to be
2634 significantly faster than the old GNU `qsort' function. Merge sort is
2635 now the standard `qsort' function. The new algorithm can require a lot
2636 of temporary storage; so, the old sorting function is called when the
2637 required storage is not available.
2639 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2640 provides the Unix `crypt' function, plus some other entry points.
2642 * The code and header files taken from 4.4 BSD have been updated with the
2643 latest files released from Berkeley.
2645 ----------------------------------------------------------------------
2646 Copyright information:
2648 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2650 Permission is granted to anyone to make or distribute verbatim copies
2651 of this document as received, in any medium, provided that the
2652 copyright notice and this permission notice are preserved,
2653 thus giving the recipient permission to redistribute in turn.
2655 Permission is granted to distribute modified versions
2656 of this document, or of portions of it,
2657 under the above conditions, provided also that they
2658 carry prominent notices stating who last changed them.
2661 version-control: never