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:
12 438, 4719, 6792, 13028, 13064, 14094, 14841, 14906, 14958, 15319, 15467,
13 15790, 15969, 16159, 16339, 16351, 16352, 16512, 16560, 16704, 16783,
14 16850, 17053, 17090, 17195, 17269, 17293, 17322, 17523, 17542, 17569,
15 17581, 17588, 17596, 17620, 17621, 17628, 17631, 17692, 17711, 17715,
16 17776, 17779, 17792, 17836, 17912, 17916, 17930, 17932, 17944, 17949,
17 17964, 17965, 17967, 17969, 17978, 17987, 17991, 17996, 17998, 17999,
18 18007, 18019, 18020, 18029, 18030, 18032, 18036, 18038, 18039, 18042,
19 18043, 18046, 18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110,
20 18111, 18116, 18125, 18128, 18138, 18185, 18196, 18197, 18206, 18210,
21 18211, 18217, 18220, 18221, 18234, 18244, 18247, 18287, 18319, 18324,
22 18333, 18346, 18397, 18409, 18410, 18412, 18418, 18422, 18434, 18444,
23 18468, 18469, 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18507.
25 * Cache information can be queried via sysconf() function on s390 e.g. with
26 _SC_LEVEL1_ICACHE_SIZE as argument.
28 * A buffer overflow in gethostbyname_r and related functions performing DNS
29 requests has been fixed. If the NSS functions were called with a
30 misaligned buffer, the buffer length change due to pointer alignment was
31 not taken into account. This could result in application crashes or,
32 potentially arbitrary code execution, using crafted, but syntactically
33 valid DNS responses. (CVE-2015-1781)
35 * The time zone file parser has been made more robust against crafted time
36 zone files, avoiding heap buffer overflows related to the processing of
37 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
38 large time zone data files. Overly long time zone specifiers in the TZ
39 variable no longer result in stack overflows and crashes.
41 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
42 for LD and GD on x86 and x86-64, has been implemented. You will need
43 binutils-2.24 or later to enable this optimization.
45 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
46 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
47 Hat). These updates cause user visible changes, such as the fix for bug
50 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
51 and getXXbyYY NSS calls for the same database, causing a denial-of-service
52 condition in some applications.
54 * Added vector math library named libmvec with the following vectorized x86_64
55 implementations: cos, cosf.
56 The library can be disabled with --disable-mathvec. Use of the functions is
57 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
58 The library is linked in as needed when using -lm (no need to specify -lmvec
60 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
64 * The following bugs are resolved with this release:
66 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
67 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
68 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
69 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
70 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
71 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
72 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
73 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
74 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
75 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
78 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
79 too little memory for the to-be-scanned arguments and overflow the
80 allocated buffer. The implementation now correctly computes the required
81 buffer size when using malloc, and switches to malloc from alloca as
84 * A new semaphore algorithm has been implemented in generic C code for all
85 machines. Previous custom assembly implementations of semaphore were
86 difficult to reason about or ensure that they were safe. The new version
87 of semaphore supports machines with 64-bit or 32-bit atomic operations.
88 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
89 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
91 * Port to Altera Nios II has been contributed by Mentor Graphics.
93 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
94 implementations for powerpc64/powerpc64le.
95 Implemented by Adhemerval Zanella (IBM).
97 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
98 and powerpc64le. This may improve lock scaling of existing programs on
99 HTM capable systems. The lock elision code is only enabled with
100 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
101 powerpc will issue a transaction abort on every syscall to avoid side
102 effects being visible outside transactions.
104 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
105 AArch64. Contributed by ARM Ltd.
107 * i386 memcpy functions optimized with SSE2 unaligned load/store.
109 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
110 under certain input conditions resulting in the execution of a shell for
111 command substitution when the application did not request it. The
112 implementation now checks WRDE_NOCMD immediately before executing the
113 shell and returns the error WRDE_CMDSUB as expected.
115 * CVE-2012-3406 printf-style functions could run into a stack overflow when
116 processing format strings with a large number of format specifiers.
118 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
119 infinite loop if the DNS response contained a PTR record of an unexpected
122 * The minimum GCC version that can be used to build this version of the GNU
123 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
124 still be used to compile programs using the GNU C Library.
126 * The GNU C Library is now built with -Werror by default. This can be
127 disabled by configuring with --disable-werror.
129 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
131 * The obsolete sigvec function has been removed. This was the original
132 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
133 programs have been using instead for about 25 years. Of course, ABI
134 compatibility for old binaries using sigvec remains intact.
136 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
137 with newer versions of bison.
139 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
140 The original MIPS o32 hard-float ABI requires an FPU where double-precision
141 registers overlay two consecutive single-precision registers. MIPS32R2
142 introduced a new FPU mode (FR=1) where double-precision registers extend the
143 corresponding single-precision registers which is incompatible with the
144 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
145 require the use of FR=1 making a transition necessary. New o32 ABI
146 extensions enable users to migrate over time from the original o32 ABI
147 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
148 tracks the ABI of any loaded object and verifies that new objects are
149 compatible. Mode transitions will also be requested as required and
150 unsupportable objects will be rejected. The ABI checks include both soft and
151 hard float ABIs for o32, n32 and n64.
153 GCC 5 with GNU binutils 2.25 onwards:
154 It is strongly recommended that all o32 system libraries are built using the
155 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
156 with the original and all new o32 ABI extensions. Configure a MIPS GCC
157 compiler using --with-fp-32=xx to set this by default.
161 * The following bugs are resolved with this release:
163 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
164 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
165 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
166 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
167 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
168 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
169 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
170 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
171 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
172 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
173 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
174 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
175 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
176 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
177 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
179 * Reverted change of ABI data structures for s390 and s390x:
180 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
181 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
182 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
183 are preserved pointing straight to the same implementation as the old ones.
184 Given that, new callers will simply provide a too-big buffer to these
185 functions. Any applications/libraries out there that embed jmp_buf or
186 ucontext_t in an ABI-relevant data structure that have already been rebuilt
187 against 2.19 headers will have to rebuilt again. This is necessary in any
188 case to revert the breakage in their ABI caused by the glibc change.
190 * Support for file description locks is added to systems running the
191 Linux kernel. The standard file locking interfaces are extended to
192 operate on file descriptions, not file descriptors, via the use of
193 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
194 are associated with an open file instead of a process.
196 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
198 * The minimum Linux kernel version that this version of the GNU C Library
199 can be used with is 2.6.32.
201 * Running the testsuite no longer terminates as soon as a test fails.
202 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
203 with PASS or FAIL lines for individual tests. A summary of the results is
204 printed, including a list of failing lists, and "make check" exits with
205 error status if there were any unexpected failures. "make check
206 stop-on-test-failure=y" may be used to keep the old behavior.
208 * The am33 port, which had not worked for several years, has been removed
211 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
212 supported; they now act the same as _DEFAULT_SOURCE (but generate a
213 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
214 conflicted with POSIX (support for which was removed in 2.19), the
215 interfaces those macros enabled remain available when compiling with
216 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
219 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
221 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
222 This may improve lock scaling of existing programs on TX capable systems.
223 The lock elision code is only built with --enable-lock-elision=yes and
224 then requires a GCC version supporting the TX builtins. With lock elision
225 default mutexes are elided via __builtin_tbegin, if the cpu supports
226 transactions. By default lock elision is not enabled and the elision code
229 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
230 copy the path argument. This allowed programs to cause posix_spawn to
231 deference a dangling pointer, or use an unexpected pathname argument if
232 the string was modified after the posix_spawn_file_actions_addopen
235 * All supported architectures now use the main glibc sysdeps directory
236 instead of some being in a separate "ports" directory (which was
237 distributed separately before glibc 2.17).
239 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
240 On configurations that support it (all Linux configurations), it's now
241 used regardless of the --enable-add-ons switch to configure. It is no
242 longer possible to build such configurations without pthreads support.
244 * Locale names, including those obtained from environment variables (LANG
245 and the LC_* variables), are more tightly checked for proper syntax.
246 setlocale will now fail (with EINVAL) for locale names that are overly
247 long, contain slashes without starting with a slash, or contain ".." path
248 components. (CVE-2014-0475) Previously, some valid locale names were
249 silently replaced with the "C" locale when running in AT_SECURE mode
250 (e.g., in a SUID program). This is no longer necessary because of the
253 * On x86-64, the dynamic linker's lazy-binding support is now compatible
254 with application code using Intel MPX instructions. (With all previous
255 versions, the MPX register state could be clobbered when making calls
256 into or out of a shared library.) Note that while the new dynamic
257 linker is compatible with all known x86 hardware whether or not it
258 supports Intel MPX, some x86 instruction-set emulators might fail to
259 handle the new instruction encodings. This is known to affect Valgrind
260 versions up through 3.9 (but will be fixed in the forthcoming 3.10
261 release), and might affect other tools that do instruction emulation.
263 * Support for loadable gconv transliteration modules has been removed.
264 The support for transliteration modules has been non-functional for
265 over a decade, and the removal is prompted by security defects. The
266 normal gconv conversion modules are still supported. Transliteration
267 with //TRANSLIT is still possible, and the //IGNORE specifier
268 continues to be supported. (CVE-2014-5119)
270 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
271 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
272 resulting a denial-of-service security vulnerability in applications which
273 use functions related to iconv. (CVE-2014-6040)
277 * The following bugs are resolved with this release:
279 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
280 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
281 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
282 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
283 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
284 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
285 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
286 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
287 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
288 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
289 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
290 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
291 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
292 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
293 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
294 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
295 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
296 16431, 16453, 16474, 16506, 16510, 16529
298 * Slovenian translations for glibc messages have been contributed by the
299 Translation Project's Slovenian team of translators.
301 * The public headers no longer use __unused nor __block. This change is to
302 support compiling programs that are derived from BSD sources and use
303 __unused internally, and to support compiling with Clang's -fblock
304 extension which uses __block.
306 * CVE-2012-4412 The strcoll implementation caches indices and rules for
307 large collation sequences to optimize multiple passes. This cache
308 computation may overflow for large collation sequences and may cause a
309 stack or buffer overflow. This is now fixed to use a slower algorithm
310 which does not use a cache if there is an integer overflow.
312 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
313 rules for large collation sequences to optimize multiple passes and falls
314 back to alloca if malloc fails, resulting in a possible stack overflow.
315 The implementation now falls back to an uncached collation sequence lookup
318 * CVE-2013-4788 The pointer guard used for pointer mangling was not
319 initialized for static applications resulting in the security feature
320 being disabled. The pointer guard is now correctly initialized to a
321 random value for static applications. Existing static applications need
322 to be recompiled to take advantage of the fix (bug 15754).
324 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
325 to the d_name member of struct dirent, or omit the terminating NUL
326 character. (Bugzilla #14699).
328 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
329 aligned_alloc functions could allocate too few bytes or corrupt the
330 heap when passed very large allocation size values (Bugzilla #15855,
333 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
334 for AF_INET6 has been fixed (Bugzilla #16072).
336 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
337 pap_CW, quz_PE, the_NP.
339 * Substantially revised locales: gd_GB, ht_HT
341 * The LC_ADDRESS field was updated to support country_car for almost all
344 * ISO 1427 definitions were updated.
346 * ISO 3166 definitions were updated.
348 * The localedef utility now supports --big-endian and --little-endian
349 command-line options to generate locales for a different system from that
350 for which the C library was built.
352 * Binary locale files now only depend on the endianness of the system for
353 which they are generated and not on other properties of that system. As a
354 consequence, binary files generated with new localedef may be incompatible
355 with old versions of the GNU C Library, and binary files generated with
356 old localedef may be incompatible with this version of the GNU C Library,
357 in the following circumstances:
359 + Locale files may be incompatible on m68k systems.
361 + Locale archive files (but not separate files for individual locales) may
362 be incompatible on systems where plain "char" is signed.
364 * The configure option --disable-versioning has been removed. Builds with
365 --disable-versioning had not worked for several years.
367 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
368 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
370 * SystemTap probes for malloc have been introduced.
372 * SystemTap probes for slow multiple precision fallback paths of
373 transcendental functions have been introduced.
375 * Support for powerpc64le has been added.
377 * The soft-float powerpc port now supports e500 processors.
379 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
381 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
382 set of header declarations that are enabled by default, even when other
383 feature test macros or compiler options such as -std=c99 would otherwise
384 disable some of those declarations.
386 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
387 conflict with POSIX. The libbsd-compat library (which was a dummy library
388 that did nothing) has also been removed.
390 * Preliminary documentation about Multi-Thread, Async-Signal and
391 Async-Cancel Safety has been added.
393 * Change of ABI data structures for s390 and s390x:
394 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
395 allow for future hardware extensions. All library functions that accept or
396 return these structures were versioned in order to provide backwards
397 compatibility with existing code. However, not all cases can be handled
398 with interface versioning. If an application embeds either structure into
399 another structure and that structure is passed to another compilation unit
400 which expects the newer larger-sized object then any access to the new
401 fields will result in undefined behaviour. Similarly any access to fields
402 that were moved by the enlarging of the structures will cause undefined
403 behaviour. To fix the undefined behaviour all objects that are part of the
404 final in-memory image must agree on the size of structures, and this may
405 require recompilation.
409 * The following bugs are resolved with this release:
411 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
412 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
413 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
414 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
415 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
416 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
417 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
418 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
419 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
420 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
421 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
422 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
423 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
426 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
427 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
428 Distributions can re-enable building and using pt_chown via the new configure
429 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
430 considerable security risks and should only be used if the distribution
431 understands and accepts the risks.
433 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
436 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
437 fixed (Bugzilla #15330).
439 * Add support for calling C++11 thread_local object destructors on thread
440 and program exit. This needs compiler support for offloading C++11
441 destructor calls to glibc.
443 * Improved worst case performance of libm functions with double inputs and
446 * Support for priority inherited mutexes in pthread condition variables on
447 non-x86 architectures.
449 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
451 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
453 * Optimized string functions for ARM. Implemented by Will Newton and
456 * Optimized libm functions for SPARC. Implemented by David S. Miller.
458 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
461 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
462 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
464 * Added a benchmark framework to track performance of functions in glibc.
466 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
467 It is based on draft TS 18661 and currently enabled as a GNU extension.
469 * On Linux, the clock function now uses the clock_gettime system call
470 for improved precision, rather than old times system call.
472 * Added support for version-3 tz format files. This is needed when using
473 the tz database release 2013e or later, and affects a few unusual cases --
474 currently only TZ='America/Godthab' for time stamps after 2037.
476 * Added new API functions pthread_getattr_default_np and
477 pthread_setattr_default_np to get and set the default pthread
478 attributes of a process.
480 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
481 This may improve lock scaling of existing programs on TSX capable systems.
482 When the --enable-lock-elision=yes parameter is specified at configure
483 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
486 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
487 availability). Implemented by Ryan S. Arnold.
489 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
493 * The following bugs are resolved with this release:
495 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
496 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
497 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
498 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
499 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
500 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
501 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
502 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
503 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
504 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
505 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
506 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
507 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
508 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
509 14879, 14889, 14893, 14898, 14914.
511 * Optimization of memcpy for MIPS.
513 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
514 EMFILE has been fixed (Bugzilla #14889).
516 * The add-on ports collection is now distributed in the "ports" subdirectory
517 of the main GNU C Library distribution, rather than separately.
519 * Port to ARM AArch64 contributed by Linaro.
521 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
522 Optimized versions of memcpy, memset, and memcmp added for System z10 and
524 Implemented by Andreas Krebbel.
526 * The new function secure_getenv allows secure access to the environment,
527 returning NULL if running in a SUID/SGID process. This function replaces
528 the internal function __secure_getenv.
530 * SystemTap static probes have been added into the dynamic linker.
531 Implemented by Gary Benson.
533 * Optimizations of string functions strstr, strcasestr and memmem.
534 Implemented by Maxim Kuvyrkov.
536 * The minimum Linux kernel version that this version of the GNU C Library
537 can be used with is 2.6.16.
539 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
540 powerpc POWER7. Implemented by Will Schmidt.
542 * New configure option --disable-nscd builds the C library such that it
543 never attempts to contact the Name Service Caching Daemon (nscd).
544 New configure option --disable-build-nscd avoids building nscd itself;
545 this is the default if --disable-nscd is used.
547 * Improved support for cross-compilation, including cross-testing and
548 bootstrap builds without a previously built glibc.
550 * Several testsuite tests are now able to test multiple IFUNC variants of an
551 interface, rather than just testing the one that would be chooen by
554 * New configure options --with-bugurl and --with-pkgversion, for
555 distributors to use to embed their bug-reporting and package version
556 information in --help and --version output.
558 * The ttyname and ttyname_r functions on Linux now fall back to searching for
559 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
560 allows creation of chroots without the procfs mounted on /proc.
562 * The `crypt' function now fails if passed salt bytes that violate the
563 specification for those values. On Linux, the `crypt' function will
564 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
565 enabled, and fail on encrypted strings using the MD5 or DES algorithm
566 when the mode is enabled.
568 * The `clock_*' suite of functions (declared in <time.h>) is now available
569 directly in the main C library. Previously it was necessary to link with
570 -lrt to use these functions. This change has the effect that a
571 single-threaded program that uses a function such as `clock_gettime' (and
572 is not linked with -lrt) will no longer implicitly load the pthreads
573 library at runtime and so will not suffer the overheads associated with
574 multi-thread support in other code such as the C++ runtime library.
576 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
581 * The following bugs are resolved with this release:
583 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
584 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
585 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
586 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
587 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
588 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
589 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
590 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
591 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
592 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
593 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
594 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
595 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
596 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
597 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
598 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
599 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
600 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
601 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
602 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
603 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
604 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
607 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
608 configuring glibc with:
609 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
610 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
611 Implemented by H.J. Lu.
615 + define static_assert
617 + do not declare gets
619 + declare at_quick_exit and quick_exit also for ISO C11
621 + aligned_alloc. NB: The code is deliberately allows the size parameter
622 to not be a multiple of the alignment. This is a moronic requirement
623 in the standard but it is only a requirement on the caller, not the
628 + uchar.h support added
630 + CMPLX, CMPLXF, CMPLXL added
632 Implemented by Ulrich Drepper.
634 * Support for the IA-64 has been moved to ports.
636 * Remove support for anything but ELF binary format
638 * Checking versions of poll, ppoll added.
639 Implemented by Ulrich Drepper.
641 * More generic and 64-bit performance optimizations to math functions.
642 Implemented by Ulrich Drepper.
644 * New configure option --enable-obsolete-rpc makes the deprecated RPC
645 headers and functions available at compile time as they were before
646 version 2.14. This option will be removed at some time in the future
647 after the TI-RPC library becomes fully sufficient for the needs of
648 existing applications.
650 * Compatibility code for Linux kernel versions before 2.4 has been removed.
651 Note that glibc is not expected to work with any Linux kernel version
654 * New header <sys/auxv.h> and function getauxval allowing easy access to
655 the AT_* key-value pairs passed from the Linux kernel. The header also
656 defines the HWCAP_* bits associated with the AT_HWCAP key.
658 * New locales: mag_IN
660 * New configure option --enable-systemtap builds SystemTap static probes
661 into libc for setjmp and longjmp and into libpthread for various operations.
662 So far the setjmp/longjmp probes and some of the libpthread probes are
663 provided only for i*86 and x86_64.
664 Implemented by Roland McGrath and Rayson Ho.
666 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
668 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
671 * More optimized functions for SPARC. Implemented by David S. Miller.
673 * Improved support for cross-compilation, especially bootstrap builds
674 without a previously built glibc.
676 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
677 Chris Metcalf from Tilera.
679 * Support for the old ARM ABI has been removed from ports. Only the EABI is
680 now supported for ARM processors.
682 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
683 as the name of the dynamic linker, to distinguish it from the
684 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
686 * Support for CRIS has been removed from ports.
688 * A new class of installed header has been documented for low-level
689 platform-specific functionality. PowerPC added the first instance with a
690 function to provide time base register access. Contributed by Tulio
691 Magno Quites Machado Filho.
693 * ix86 configurations now install header files that are consistent with
694 what x86-64 configurations install. These same header files can be used
695 for -m32, -m64, or -mx32 builds.
696 Contributed by H.J. Lu.
698 * Math library bug fixes. A thorough audit of all open math library bugs was
699 conducted by Joseph Myers. Significant progress was made on many math
700 library bugs resulting in more accurate exceptions and function results.
701 Many thanks to all those that contributed including Andreas Jaeger for his
702 patch review and work on the x87 trigonometric instruction issues.
704 * Timezone data is no longer installed. Timezone-related binaries and scripts
705 will continue to be installed. Users should obtain their timezone data from
706 their distribution provider or from the tzdata package at
707 <ftp://munnari.oz.au/pub/>.
711 * The following bugs are resolved with this release:
713 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
714 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
715 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
716 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
717 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
718 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
719 13484, 13506, 13515, 13523, 13524, 13538, 13540
721 * New program pldd to list loaded object of a process
722 Implemented by Ulrich Drepper.
724 * Add nss_db support back to glibc. No more dependency on Berkeley db
725 and support for initgroups lookups.
726 Implemented by Ulrich Drepper.
728 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
729 Contributed by HJ Lu.
731 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
732 Contributed by HJ Lu.
734 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
735 on x86-32 and x86-64.
736 Contributed by Liubov Dmitrieva.
738 * Optimized strchr and strrchr for SSE on x86-32.
739 Contributed by Liubov Dmitrieva.
741 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
742 for x86-64 and x86-32.
743 Contributed by Liubov Dmitrieva.
745 * New interfaces: scandirat, scandirat64
746 Implemented by Ulrich Drepper.
748 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
749 Implemented by Ulrich Drepper.
751 * nscd now also caches the netgroup database.
752 Implemented by Ulrich Drepper.
754 * Integrate libm with gcc's -ffinite-math-only option.
755 Implemented by Ulrich Drepper.
757 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
758 to math functions. Implemented by Ulrich Drepper.
760 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
761 Implemented by Ulrich Drepper.
763 * New Linux interfaces: process_vm_readv, process_vm_writev
765 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
766 Implemented by Ulrich Drepper.
768 * Optimized nearbyint and strcasecmp for PPC.
769 Implemented by Adhemerval Zanella.
771 * New locales: bho_IN, unm_US, es_CU, ta_LK
775 * The following bugs are resolved with this release:
777 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
778 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
779 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
780 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
781 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
782 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
783 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
784 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
785 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
786 12795, 12811, 12813, 12814, 12841
788 * The RPC implementation in libc is obsoleted. Old programs keep working
789 but new programs cannot be linked with the routines in libc anymore.
790 Programs in need of RPC functionality must be linked against TI-RPC.
791 The TI-RPC implementation is IPv6 enabled and there are other benefits.
793 Visible changes of this change include (obviously) the inability to link
794 programs using RPC functions without referencing the TI-RPC library and the
795 removal of the RPC headers from the glibc headers.
796 Implemented by Ulrich Drepper.
798 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
799 syncfs, setns, sendmmsg
801 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
802 yue_HK, lij_IT, mhr_RU
804 * New encodings: CP770, CP771, CP772, CP773, CP774
806 * New program sotruss to trace calls through PLTs
807 Implemented by Ulrich Drepper.
809 * The malloc hook implementation is marked deprecated and will be removed
810 from the default implementation in the next version. The design never
811 worked ever since the introduction of threads. Even programs which do
812 not create threads themselves can use multiple threads created internally.
816 * The following bugs are resolved with this release:
818 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
819 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
820 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
821 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
824 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
826 * POWER7 optimizations: memset, memcmp, strncmp
828 * New optimized string functions for x86-64: strnlen (SSE2),
829 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
830 Implemented by Ulrich Drepper.
834 * The following bugs are resolved with this release:
836 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
837 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
838 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
839 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
840 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
841 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
842 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
843 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
845 * New interfaces: pthread_getname_np, pthread_setname_np
847 * New Linux interface: recvmmsg
849 * STT_GNU_IFUNC implemented for Sparc by David Miller.
851 * The dynamic linker now recognizes supported ABI versions from the
852 EI_ABIVERSION field in the ELF header.
853 Implemented by Ulrich Drepper.
855 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
856 will not be used to fill in password fields in the passwd.byname replies.
857 Instead it is used to synthesize the shadow.byname table, should it be
858 missing. This is a useful mode in some installations involving Solaris.
859 Implemented by Ulrich Drepper.
861 * New locales: kok_IN, sq_MK, cv_RU
865 * The following bugs are resolved with this release:
867 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
868 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
869 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
870 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
871 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
872 10789, 10817, 10823, 10840, 10847
874 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
876 Implemented by Ulrich Drepper.
878 * Checking version of longjmp added that fails if an uninitialized stack
879 frame would be created. Implemented by Ulrich Drepper.
881 * STT_GNU_IFUNC is now supported in static executables.
882 Implemented by H.J. Lu.
884 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
886 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
887 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
888 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
889 Contributed by H.J. Lu.
891 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
892 Implemented by Ulrich Drepper.
894 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
896 Contributed by H.J. Lu.
898 * Support for fma instruction in AVX on x86-64.
899 Implemented by H.J. Lu and Ulrich Drepper.
901 * AVX support in x86-64 auditing support in ld.so.
902 Implemented by H.J. Lu.
904 * STB_GNU_UNIQUE support added.
905 Implemented by Ulrich Drepper.
907 * Implement second fallback mode for optimized DNS lookup for even more
908 broken environments. If two requests from the same port are not
909 handled correctly close the socket and open a new one before sending
910 the second request. The 'single-request-reopen' option in /etc/resolv.conf
911 can be used to select this mode right away, instead of rediscovering the
912 necessity is every process again.
913 Implemented by Ulrich Drepper.
915 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
916 Implemented by Adam Tkac.
918 * Optimized iconv conversions for S390x.
919 Implemented by Andreas Krebbel.
921 * Using condvars with PI mutexes is now more efficient due to kernel
922 support for requeueing to PI futexes. NPTL support added for x86-64.
923 Implemented by Ulrich Drepper.
925 * New locales: ps_AF, my_MM
929 * The following bugs are resolved with this release:
931 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
932 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
933 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
934 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
935 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
937 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
938 Implemented by Ulrich Drepper.
940 * New Linux interfaces: accept4, fallocate, fallocate64.
941 Implemented by Ulrich Drepper.
943 * Correct declarations of string function when used in C++ code. This
944 could lead to compile errors for invalid C++ code.
946 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
949 * New POSIX 2008 interface: psiginfo
950 Implemented by Ulrich Drepper.
952 * New ISO C++1x interfaces: quick_exit, at_quick_exit
953 Implemented by Ulrich Drepper.
955 * Support for selecting between multiple function definitions at runtime
956 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
958 * The libcrypt library can now use the hash function implementations in
959 NSS. Implemented by Ulrich Drepper.
961 * The malloc implementation can be compiled to be less memory efficient
962 but higher performing in multi-threaded programs.
963 Implemented by Ulrich Drepper.
965 * New locales: nan_TW@latin, ks_IN
967 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
968 Implemented by Ulrich Drepper.
970 * Extended printf hook support. It is possible to use user-defined types
971 and extend existing format specifiers.
972 Implemented by Ulrich Drepper.
974 * Handling for group shadow files has been added.
975 Implemented by Ulrich Drepper.
977 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
978 servers (the case, e.g., for some people using the built-in DNS
979 server in ADSL modems/routers). There is a once-per-process timeout
980 in case of a broken server. To avoid it, users can run nscd or put
981 'options single-request' in /etc/resolv.conf.
982 Implemented by Ulrich Drepper.
986 * The following bugs are resolved with this release:
988 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
989 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
990 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
991 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
992 6968, 6974, 6980, 6995, 7008, 7009, 7029
994 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
995 up at the same time. Implemented by Ulrich Drepper.
997 * TLS descriptors for LD and GD on x86 and x86-64.
998 Implemented by Alexandre Oliva.
1000 * getaddrinfo now handles DCCP and UDPlite.
1001 Implemented by Ulrich Drepper.
1003 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1004 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1005 Implemented by Ulrich Drepper.
1007 * New implementation of memmem, strstr, and strcasestr which is O(n).
1008 Implemented by Eric Blake.
1010 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1012 * Implement "e" option for popen to open file descriptor with the
1013 close-on-exec flag set. Implemented by Ulrich Drepper.
1015 * Implement "b" mode for fmemopen. In this mode writes writes don't
1016 implicitly add a NUL byte and seeks from the end of the buffer really
1017 use the buffer end, not the string length as the basis.
1018 Implemented by Ulrich Drepper.
1020 * Many functions, exported and internal, now atomically set the close-on-exec
1021 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1023 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1025 Implemented by Pravin Satpute.
1027 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1031 * The following bugs are resolved with this release:
1033 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1034 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1035 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1036 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1037 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1038 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1039 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1041 * New locales: bo_CN, bo_IN, shs_CA.
1043 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1045 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1046 Implemented by Pravin Satpute.
1048 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1050 * nscd caches now all timeouts for DNS entries
1051 Implemented by Ulrich Drepper.
1053 * nscd is more efficient and wakes up less often.
1054 Implemented by Ulrich Drepper.
1056 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1057 vdprintf, and obstack_vprintf.
1058 Implemented by Jakub Jelinek.
1060 * Faster memset for x86-64.
1061 Implemented by Harsha Jagasia and H.J. Lu.
1063 * Faster memcpy on x86.
1064 Implemented by Ulrich Drepper.
1066 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1067 Implemented by Ulrich Drepper.
1069 * Faster sqrt and sqrtf implemention for some PPC variants.
1070 Implemented by Steven Munroe.
1074 * The following bugs are resolved with this release:
1076 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1077 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1078 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1079 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1080 5071, 5103, 5104, 5112, 5113, 5184, 5186
1082 * More checking functions: fread, fread_unlocked, open*, mq_open.
1083 Implemented by Jakub Jelinek and Ulrich Drepper.
1085 * Extend fortification to C++. Implemented by Jakub Jelinek.
1087 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1088 by not recognizing 'a' as a modifier when those specs are requested.
1089 Implemented by Jakub Jelinek.
1091 * PPC optimizations to math and string functions.
1092 Implemented by Steven Munroe.
1094 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1095 options to be passed. Implemented by Ulrich Drepper.
1097 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1099 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1100 Implemented by Ulrich Drepper.
1102 * Handle private futexes in the NPTL implementation.
1103 Implemented by Jakub Jelinek and Ulrich Drepper.
1105 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1106 Implemented by Roland McGrath and Ulrich Drepper.
1108 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1110 * SHA-256 and SHA-512 based password encryption.
1111 Implemented by Ulrich Drepper.
1113 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1114 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1117 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1118 Implemented by Ulrich Drepper.
1122 * The following bugs are resolved with this release:
1124 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1125 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1126 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1127 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1128 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1129 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1130 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1133 * New Linux interfaces: epoll_pwait, sched_getcpu.
1135 * New generic interfaces: strerror_l.
1137 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1141 * The following bugs are resolved with this release:
1143 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1144 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1145 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1146 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1147 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1148 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1149 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1150 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1151 3225, 3251, 3252, 3253, 3273
1153 * For Linux, the sorting of addresses returned by getaddrinfo now also
1154 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1155 Implemented by Ulrich Drepper.
1157 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1158 Implemented by Ulrich Drepper.
1160 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1162 * New iconv module for MIK. Contributed by Alexander Shopov.
1164 * For sites with broken group and/or passwd database, the auto-propagate
1165 option of nscd can prevent creating ID lookup entries from the results
1166 of a name lookup and vice versa. This usually is no problem but some
1167 site might have problems with the default behavior.
1168 Implemented by Ulrich Drepper.
1170 * Iterating over entire database in NIS can be slow. With the
1171 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1172 to trade time for memory. The entire database will be read at once.
1173 Implemented by Ulrich Drepper.
1175 * The interfaces introduced in RFC 3542 have been implemented by
1178 * Support for the new ELF hash table format was added by Ulrich Drepper.
1180 * Support for priority inheritance mutexes added by Jakub Jelinek and
1183 * Support for priority protected mutexes added by Jakub Jelinek.
1185 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1186 or_IN, csb_PL, fy_NL, sr_ME.
1190 * More overflow detection functions.
1192 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1193 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1195 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1196 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1197 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1198 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1199 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1200 by Masahide Washizawa.
1202 * It is now possible to install audit libraries for the dynamic linker using
1203 LD_AUDIT. Implemented by Ulrich Drepper.
1205 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1206 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1207 For a libc and libpthread that works well on Linux 2.4 kernels, we
1208 recommend using the stable 2.3 branch.
1210 * The new function open_wmemstream acts like open_memstream,
1211 but uses a wchar_t wide character buffer.
1213 * The new function ppoll is an improved version of poll, similar to pselect.
1215 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1216 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1217 renameat, unlinkat, linkat, symlinkat, readlinkat.
1219 * New Linux kernel system calls: unshare,
1220 inotify_init, inotify_add_watch, inotify_rm_watch.
1222 * The euidaccess function is now also known by the alias eaccess,
1223 for compatibility with some other systems.
1225 * Timezone data updated to 2006b version.
1229 * The following bugs are resolved with this release:
1231 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1232 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1233 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1234 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1235 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1236 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1238 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1240 * As of this release, GCC 4 can be used to compile the C Library.
1242 * Timezone data updated to 2005m version.
1246 * The following bugs are resolved with this release:
1248 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1249 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1250 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1251 777, 787, 821, 822, 823, 825
1253 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1257 * Support for RFC 3678. Real implementations exist only for Linux so far.
1258 Implemented by Ulrich Drepper.
1260 * nscd can now cache entries persistently. Expiring entries are reloaded.
1261 For speedups the cache can be shared in memory with client processes.
1262 Implemented by Ulrich Drepper.
1264 * nscd can now perform SELinux checks.
1265 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1267 * getaddrinfo queries are now cached. Canonical name lookup is performed
1269 Implemented by Ulrich Drepper.
1271 * The nothrow function attribute is used when headers are used by gcc when
1272 compiling C code. This can avoid significant amounts of exception
1275 * The malloc functions perform more error checking and are stricter when
1276 it comes to reacting on errors. The default action is to terminate
1277 the process after showing an error message. Implemented by Ulrich Drepper.
1279 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1280 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1282 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1283 namespaces using the new function dlmopen(). This feature is of course,
1284 like most other dynamic loading functionality, not available in statically
1285 linked applications. Implemented by Ulrich Drepper.
1287 * Low-overhead boundary checking variants of string and some stdio functions
1288 were added. These are to be used in conjunction with a gcc patch by
1289 Jakub Jelinek which adds calls to these functions if possible.
1290 Implemented by Jakub Jelinek and Ulrich Drepper.
1292 * Old code for several operating systems and machine architectures that
1293 have not been in working condition in a long time have been removed from
1294 the main source tree maintained by the GNU C Library's maintainers.
1295 These files are now reside in the separate `ports' source module
1296 that is usable as an add-on when building the library.
1300 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1301 interrogate the dynamic linker, compatible with the Solaris interface.
1303 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1304 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1306 * getifaddrs now uses the netlink interface on Linux to get its information.
1307 Implemented by Thorsten Kukuk.
1309 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1310 Implemented by Ulrich Drepper.
1312 * support for non-executable stacks on x86 has been added. Changes mostly
1315 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1318 * getaddrinfo now performs destination address selection according to
1323 * Thread-safe interfaces for many functions that access locale data
1324 were added in version 2.3, but these features were omitted from NEWS.
1325 Many functions have variants with an `_l' suffix that take a `locale_t'
1326 object as a parameter rather than consulting the current locale.
1327 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1328 create and maintain `locale_t' objects. Additionally, the new function
1329 `uselocale' sets "the current locale" (as used by functions not so
1330 parameterized) set for an individual thread. These features were added
1331 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1333 * The functions getresuid, getresgid, setresuid, and setresgid, which
1334 have long been available on Linux, are now declared in <unistd.h>
1335 and are now also available on the Hurd.
1337 * ELF thread-local storage support (TLS) now works on x86-64.
1339 * The new dynamic string token $LIB is expanded in shared library names.
1340 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1342 * Aldy Hernandez contributed complete software floating point support for
1343 PowerPC machines with no FPU.
1345 * fexecve is implemented on Linux.
1347 * The `btowc' function should work at least twice as fast due to
1348 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1350 * With approriate thread add-ons cancelable functions are now implemented
1351 in libc.so as well. No need to call the function in libpthread. This
1352 change allowed to finally disable the incorrect and expensive handling
1353 of weak definition in ld.so.
1355 * Yet more PLT entries in libc.so have been removed. We finally arrived
1356 at the bare minimum. Startup times improved appropriately.
1358 * Support for the new Linux/x86 system call interface was added. The
1359 AT_SYSINFO auxiliary vector entry is recognized and handled.
1363 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1366 * iconv (the program and the interface) now accepts empty names (excluding
1367 options like //TRANSLIT) to mean "use charset of current locale".
1369 * localedef can now transliterate characters in strings which are not in
1370 the provided charmap. The information from the input locale is used.
1372 * Prelinking support was added for ELF targets. This requires additional
1373 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1375 * Read-only stdio streams now use mmap to speed up operation by eliminating
1376 copying and buffer underflows. To use add 'm' to the mode string of
1377 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1379 * The malloc functions were completely rewritten by Wolfram Gloger based
1380 on Doug Lea's malloc-2.7.0.c.
1382 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1383 implementation of regex.
1385 * Bruno Haible upgraded the iconv and locale implementation to support
1388 * Contents of the LC_* and LANG environment variables in the CEN style are
1389 not recognized anymore. It never was used. Change by Ulrich Drepper.
1391 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1392 thread-local storage (TLS) ABI on some platforms.
1393 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1395 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1396 EUC-JISX0213, and TSCII.
1398 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1399 BSD-compatible interface for getting all network interface addresses.
1400 Implementation for IPv4 by Roland McGrath.
1402 * Loading of locale data is faster due to the introduction of a locale
1403 archive. Implemented by Roland McGrath and Ulrich Drepper.
1405 * Startup times are significantly reduced by not using exported functions
1406 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1409 * Steven Munroe contributed a port to PowerPC64/Linux.
1413 * The Hurd now uses the GNU libio implementation of stdio rather than the
1414 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1416 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1417 with the same behavior as the Linux system call of the same name.
1421 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1422 128-bit long double format.
1424 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1425 IBM1161, and IBM1162 charsets.
1427 * Andreas Jaeger contributed a port to x86-64/Linux.
1429 * Peter Bruin contributed a port to PowerPC/Hurd.
1431 * libc functions using I/O streams now can handle wide-oriented streams
1434 * optimizations in the dynamic linker. Binaries created by recent binutils
1435 versions start up quicker due to reduced time spent on relocations.
1437 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1441 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1442 asinh, atanh, j0 for the 128-bit long double format.
1444 * Bruno Haible updated all the code handling Unicode in some form to
1445 support Unicode 3.1.
1447 * Speed of regex for single-byte locales is back to previous levels.
1448 Patch by Isamu Hasegawa.
1450 * Alpha, SPARC, and IA-64 now also using floating stacks.
1452 * Startup time of internationalized applications greatly improved through
1453 iconv cache. Use iconvconfig to generate the cache file.
1454 Contributed by Ulrich Drepper.
1456 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1457 severe performance problems. Patch by David Mosberger.
1459 * The Hurd port got a lot more functionality like AIO, various stdio
1460 extensions, etc. Mainly done by Roland McGrath.
1462 * mtrace can now lookup symbols in shared libraries.
1466 * Intel's IA-64 math library is largely integrated. It provides fast and
1467 accurate implementatations for most basic and standard math functions
1468 in float, double, and long double format.
1470 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1471 and asin for the 96-bit long double format and asin, log, tan for the
1472 128-bit long double format.
1474 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1475 The basic double functions exist today. Contributed by Abraham Ziv
1476 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1477 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1479 * An asynchronous name lookup library was added. The interface is designed
1480 after POSIX AIO. The proposal was circulated beforehand to get comments.
1481 No negative ones came in. Implemented by Ulrich Drepper.
1483 * Port to S390/64bit contributed by Martin Schwidefsky
1484 <schwidefsky@de.ibm.com>.
1486 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1487 of functions for Linux/IA-64.
1489 * The RPC code is now thread safe. Threads can now use the same service
1490 of different services at the same time. Patch by Eric Norum
1491 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1493 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1494 family of functions for Linux/S390.
1496 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1497 of functions for Linux/x86.
1499 * Port to Linux/CRIS contributed by Axis Communications.
1503 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1504 we can now check for namespace violations and missing declarations. The
1505 result is that almost all headers are now Unix-compliant (as defined in
1506 the upcoming XPG6). The negative side is that some programs might need
1507 corrections, too, if they depend on the incorrect form of the headers in
1508 previous versions which defined too many symbols and included too many
1511 * regex now handles multibyte character sets correctly.
1512 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1514 * iconv (the program) does now conform to the upcoming XPG6 and handles
1515 charmaps. Instead of the charset names the path of charmaps can be
1516 provided and the conversion happens based on this data.
1517 Contributed by Ulrich Drepper.
1519 * The locale program now provides detailed information about the installed
1524 only lists the names of the supported locales
1528 provides details such as country, language, and codeset name.
1529 Contributed by Ulrich Drepper.
1533 * The gencat program now parses the input file according to the charset
1534 selected by the LC_CTYPE category. This is important for stateful
1535 character sets. To make generating catalogs easier there is a way
1536 to overwrite the charset selected by the locale: before the first
1537 message or $ quote line the catalog can contain a line like
1539 $ codeset=ISO-8859-2
1541 to select the charset (ISO-8859-2 in this case).
1543 Implemented by Shinya Hanataka and Ulrich Drepper.
1545 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1546 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1547 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1549 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1550 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1552 * The LANGUAGE environment variable is now ignored unless the locale is
1553 changed from the default "C" locale.
1555 * The usual bug fixes.
1559 * Greg McGary added runtime support for bounds checking using gcc's
1560 new -fbounded-pointers option. ix86 target is complete. PowerPC
1563 * Thorsten Kukuk added secure mode support to nscd.
1565 * The Berkeley db libraries have been removed.
1567 Related, the nss_db module is now in a separate package since it
1568 obviously requires a database library being available.
1570 * Wide character I/O streams implemented by Ulrich Drepper.
1572 * Functions from the extended socket API added by Ulrich Drepper.
1574 * Functions feenableexcept and fedisableexcept to control the
1575 behaviour of individual exceptions have been added by Andreas Jaeger.
1577 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1579 * The resolver code has been updated from bind 8.2.3-T5B which supports
1580 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1583 This change could in some situations effect backward compatibility. Since
1584 now `_res' is a thread-local instead of a global variable, modifying it
1585 in one thread does not have any effect in other threads.
1587 The resolver library was also extended to allow IPv6 as the transport
1588 protocol for the requests. This work was done by Stig Venaas.
1590 * Compatibility code for K&R C compilers has been removed from the
1591 header files. A ISO C compiler is needed to use the library
1592 (conforming to either C89 or C99 standard).
1594 * Complete rewrite of the localedef program to support multibyte character
1595 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1596 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1597 Implemented by Ulrich Drepper.
1599 Bruno Haible significantly improved the generation and use of the data
1600 structures for the wide character tables.
1602 * Plural handling in gettext implemented by Ulrich Drepper.
1604 * The utmp daemon has been removed.
1606 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1608 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1611 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1613 * POSIX barriers implemented by Kaz Kylheku.
1615 * POSIX spawn function family implemented by Ulrich Drepper.
1617 * POSIX spinlocks are now available.
1619 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1621 * the configure option --enable-kernel=X.Y.Z allows to strip out
1622 compatibility for kernel versions before X.Y.Z. This is currently only
1623 implemented for Linux.
1625 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1626 field sin6_scope_id. This means that all programs using IPv6 should be
1627 recompiled. Don't expect binary compatibility with previous glibc
1630 * various conversion modules for IBM character sets contributed by
1633 * IA-64 port by Jes Sorensen and HJ Lu.
1647 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1649 * New xdr functions are added; some rpc functions are now 64bit clean.
1651 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1653 * Fixed known incompatibilities with glibc 2.0.
1655 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1657 * Optimized a number of functions (especially the ELF dynamic loader).
1659 * Update timezone data files.
1661 * lots of charmaps corrections
1663 * some new locale definitions and charmaps
1668 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1669 conform to POSIX member type requirements. Symbol versions have been
1670 adjusted as needed within the library, and for direct use by applications,
1671 but there is potential for problems if third-party libraries use
1672 struct timeval as part of their interface. This does not present
1673 a problem for X and other "essential" system libraries.
1675 * An additional locale model to support C++ Standard Library locale
1676 model and probably more was implemented by Ulrich Drepper.
1678 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1681 * Miles Bader provided the `argp' function family to support hierachical
1682 command line argument parsing, layered on top of getopt.
1684 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1686 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1689 * scanf recognizes the %a and %A format for scanning floating point numbers.
1691 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1692 information and interfaces for the available integer types.
1694 * about 130 new math functions were added to implement the ISO C9x math
1697 * the new header <complex.h> contains definitions of the complex math
1698 functions from ISO C 9X.
1700 * the new header <tgmath.h> defines generic macros to use complex or
1701 real valued functions.
1703 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1705 * Andreas Jaeger provided a test suite for the math library.
1707 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1709 * Ulrich Drepper added character set conversion functions (iconv).
1711 * Optimized string functions have been added.
1713 * The localedata addon is now part of glibc.
1715 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1717 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1718 daemon for NSS (nscd).
1720 Missing a better place here are some numbers on improvements. Under
1721 Linux 2.1.125 un-tar-ing the kernel sources takes
1725 using local files 12.19s 6.88s 22.91s
1727 using NIS 13.92s 8.91s 26.34s
1729 using NIS & nscd 10.37s 7.34s 25.30s
1731 using NIS+ 27.57s 30.37s 640.46s
1733 using NIS+ & nscd 10.25s 7.83s 26.51s
1735 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1737 Keep in mind that non-namelookup related operations dominate above times.
1738 It was just a common complain that using NIS+ unpacking the kernel is
1741 [1] The old nscd implementation is not available anymore since it was
1742 distributed with glibc up to version 2.0.98 and thus is now replaced.
1744 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1746 * Mark Kettenis provided a Hesiod NSS module.
1748 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1749 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1751 * rcmd can now handle netgroups (Dick Streefland).
1753 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1756 * Support for the IPv6 protocol has been added to the socket API, as per the
1757 latest draft standards.
1759 * Support for Linux 2.2 has been added.
1761 * Interface changes relative to the latest 2.0.x release:
1762 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1763 addseverity NEW: Unix98
1764 alphasort64 NEW: LFS
1765 argp_err_exit_status NEW: argp, GNU ext
1766 argp_error NEW: argp, GNU ext
1767 argp_failure NEW: argp, GNU ext
1768 argp_help NEW: argp, GNU ext
1769 argp_parse NEW: argp, GNU ext
1770 argp_program_bug_address NEW: argp, GNU ext
1771 argp_program_version NEW: argp, GNU ext
1772 argp_program_version_hook NEW: argp, GNU ext
1773 argp_state_help NEW: argp, GNU ext
1774 argp_usage NEW: argp, GNU ext
1775 authdes_create NEW: Secure RPC
1776 authdes_getucred NEW: Secure RPC
1777 authdes_pk_create NEW: Secure RPC
1778 backtrace NEW: GNU ext.
1779 backtrace_symbols NEW: GNU ext.
1780 backtrace_symbols_fd NEW: GNU ext.
1782 cacosf NEW: ISO C 9x
1783 cacosh NEW: ISO C 9x
1784 cacoshf NEW: ISO C 9x
1785 cacoshl NEW: ISO C 9x
1786 cacosl NEW: ISO C 9x
1793 casinf NEW: ISO C 9x
1794 casinh NEW: ISO C 9x
1795 casinhf NEW: ISO C 9x
1796 casinhl NEW: ISO C 9x
1797 casinl NEW: ISO C 9x
1799 catanf NEW: ISO C 9x
1800 catanh NEW: ISO C 9x
1801 catanhf NEW: ISO C 9x
1802 catanhl NEW: ISO C 9x
1803 catanl NEW: ISO C 9x
1804 cbc_crypt NEW: Secure RPC
1808 ccoshf NEW: ISO C 9x
1809 ccoshl NEW: ISO C 9x
1815 cimagf NEW: ISO C 9x
1816 cimagl NEW: ISO C 9x
1817 clearerr_locked REMOVED
1818 clntunix_create NEW: sunrpc ext
1820 clog10 NEW: ISO C 9x
1821 clog10f NEW: ISO C 9x
1822 clog10l NEW: ISO C 9x
1832 cprojf NEW: ISO C 9x
1833 cprojl NEW: ISO C 9x
1835 crealf NEW: ISO C 9x
1836 creall NEW: ISO C 9x
1841 csinhf NEW: ISO C 9x
1842 csinhl NEW: ISO C 9x
1845 csqrtf NEW: ISO C 9x
1846 csqrtl NEW: ISO C 9x
1850 ctanhf NEW: ISO C 9x
1851 ctanhl NEW: ISO C 9x
1853 des_setparity NEW: Secure RPC
1854 ecb_crypt NEW: Secure RPC
1855 endutxent NEW: Unix98
1857 exp10f NEW: ISO C 9x
1858 exp10l NEW: ISO C 9x
1862 fattach NEW: STREAMS
1863 fdetach NEW: STREAMS
1867 feclearexcept NEW: ISO C 9x
1868 fegetenv NEW: ISO C 9x
1869 fegetexceptflag NEW: ISO C 9x
1870 fegetround NEW: ISO C 9x
1871 feholdexcept NEW: ISO C 9x
1873 feraiseexcept NEW: ISO C 9x
1874 ferror_locked REMOVED
1875 fesetenv NEW: ISO C 9x
1876 fesetexceptflag NEW: ISO C 9x
1877 fesetround NEW: ISO C 9x
1878 fetestexcept NEW: ISO C 9x
1879 feupdateenv NEW: ISO C 9x
1880 fflush_locked REMOVED
1884 fgets_unlocked NEW: GNU ext.
1885 fileno_locked REMOVED
1897 fputc_locked REMOVED
1898 fputs_unlocked NEW: GNU ext.
1899 fread_unlocked NEW: GNU ext.
1904 fstatvfs NEW: Unix98
1908 ftruncate64 NEW: LFS
1910 fwrite_unlocked NEW: GNU ext.
1911 gai_strerror NEW: IPv6
1915 getchar_locked REMOVED
1917 getdate_err NEW: Unix98
1918 getdate_r NEW: GNU ext.
1920 getnameinfo NEW: IPv6
1921 getnetname NEW: Secure RPC
1922 getpmsg NEW: STREAMS
1923 getpt NEW: Unix98 PTY
1924 getrlimit64 NEW: LFS
1925 getutxent NEW: Unix98
1926 getutxid NEW: Unix98
1927 getutxline NEW: Unix98
1928 glob64 NEW: GNU ext.
1929 globfree64 NEW: GNU ext.
1930 gnu_get_libc_release NEW: GNU ext.
1931 gnu_get_libc_version NEW: GNU ext.
1932 grantpt NEW: Unix98 PTY
1933 host2netname NEW: Secure RPC
1935 iconv_close NEW: iconv
1936 iconv_open NEW: iconv
1937 if_freenameindex NEW: IPv6
1938 if_indextoname NEW: IPv6
1939 if_nameindex NEW: IPv6
1940 if_nametoindex NEW: IPv6
1941 in6addr_any NEW: IPv6
1942 in6addr_loopback NEW: IPv6
1943 inet6_isipv4mapped NEW: IPv6
1944 isastream NEW: STREAMS
1945 iswblank NEW: GNU ext.
1946 key_decryptsession NEW: Secure RPC
1947 key_decryptsession_pk NEW: Secure RPC
1948 key_encryptsession NEW: Secure RPC
1949 key_encryptsession_pk NEW: Secure RPC
1950 key_gendes NEW: Secure RPC
1951 key_get_conv NEW: Secure RPC
1952 key_secretkey_is_set NEW: Secure RPC
1953 key_setnet NEW: Secure RPC
1954 key_setsecret NEW: Secure RPC
1955 llrint NEW: ISO C 9x
1956 llrintf NEW: ISO C 9x
1957 llrintl NEW: ISO C 9x
1958 llround NEW: ISO C 9x
1959 llroundf NEW: ISO C 9x
1960 llroundl NEW: ISO C 9x
1965 lrintf NEW: ISO C 9x
1966 lrintl NEW: ISO C 9x
1967 lround NEW: ISO C 9x
1968 lroundf NEW: ISO C 9x
1969 lroundl NEW: ISO C 9x
1971 makecontext NEW: Unix98
1972 mempcpy NEW: GNU ext.
1975 modify_ldt NEW: kernel
1979 nearbyint NEW: ISO C 9x
1980 nearbyintf NEW: ISO C 9x
1981 nearbyintl NEW: ISO C 9x
1982 netname2host NEW: Secure RPC
1983 netname2user NEW: Secure RPC
1984 nexttoward NEW: ISO C 9x
1985 nexttowardf NEW: ISO C 9x
1986 nexttowardl NEW: ISO C 9x
1990 passwd2des NEW: Secure RPC
1992 pow10f NEW: GNU ext.
1993 pow10l NEW: GNU ext.
1996 printf_size NEW: GNU ext.
1997 printf_size_info NEW: GNU ext.
1998 profil_counter REMOVED
1999 pthread_mutexattr_getkind_np REPLACED
2000 pthread_mutexattr_setkind_np REPLACED
2001 ptsname NEW: Unix98 PTY
2002 ptsname_r NEW: Unix98 PTY
2004 putchar_locked REMOVED
2005 putgrent NEW: GNU ext.
2007 putpmsg NEW: STREAMS
2008 pututxline NEW: Unix98
2012 readdir64_r NEW: LFS
2013 remquo NEW: ISO C 9x
2014 remquof NEW: ISO C 9x
2015 remquol NEW: ISO C 9x
2017 roundf NEW: ISO C 9x
2018 roundl NEW: ISO C 9x
2020 scalbln NEW: ISO C 9x
2021 scalblnf NEW: ISO C 9x
2022 scalblnl NEW: ISO C 9x
2024 sendfile NEW: kernel
2025 setcontext NEW: Unix98
2026 setrlimit64 NEW: LFS
2027 setutxent NEW: Unix98
2029 sigignore NEW: Unix98
2030 sigqueue NEW: POSIX.1b
2031 sigrelse NEW: Unix98
2032 sigset NEW: POSIX.1b
2033 sigtimedwait NEW: POSIX.1b
2034 sigwaitinfo NEW: POSIX.1b
2035 sincos NEW: GNU ext.
2036 sincosf NEW: GNU ext.
2037 sincosl NEW: GNU ext.
2041 strcasestr NEW: GNU ext.
2042 strtoimax NEW: ISO C 9x
2043 strtoumax NEW: ISO C 9x
2044 strverscmp NEW: GNU ext.
2045 svcauthdes_stats NEW: Secure RPC
2046 svcunix_create NEW: sunrpc etx
2047 svcunixfd_create NEW: sunrpc ext
2048 swapcontext NEW: Unix98
2049 tcgetsid NEW: Unix98 PTY
2050 tdestroy NEW: GNU ext.
2051 tgamma NEW: ISO C 9x
2052 tgammaf NEW: ISO C 9x
2053 tgammal NEW: ISO C 9x
2057 truncf NEW: ISO C 9x
2058 truncl NEW: ISO C 9x
2060 unlockpt NEW: Unix98 PTY
2061 updwtmpx NEW: Unix98
2062 user2netname NEW: Secure RPC
2063 utmpxname NEW: Unix98
2064 versionsort NEW: GNU ext.
2065 versionsort64 NEW: GNU ext.
2067 wcscasecmp NEW: GNU ext.
2068 wcsncasecmp NEW: GNU ext.
2069 wcsnlen NEW: GNU ext.
2070 wcstoimax NEW: ISO C 9x
2071 wcstoll NEW: ISO C 9x
2072 wcstoull NEW: ISO C 9x
2073 wcstoumax NEW: ISO C 9x
2075 wordexp NEW: POSIX.2
2076 wordfree NEW: POSIX.2
2077 write_profiling REMOVED
2078 xdecrypt NEW: Secure RPC
2079 xdr_authdes_cred NEW: Secure RPC
2080 xdr_authdes_verf NEW: Secure RPC
2081 xdr_cryptkeyarg NEW: Secure RPC
2082 xdr_cryptkeyarg2 NEW: Secure RPC
2083 xdr_cryptkeyres NEW: Secure RPC
2084 xdr_getcredres NEW: Secure RPC
2085 xdr_key_netstarg NEW: Secure RPC
2086 xdr_key_netstres NEW: Secure RPC
2087 xdr_keybuf NEW: Secure RPC
2088 xdr_keystatus NEW: Secure RPC
2089 xdr_netnamestr NEW: Secure RPC
2090 xdr_sizeof NEW: Secure RPC
2091 xdr_unixcred NEW: sunrpc ext
2092 xencrypt NEW: Secure RPC
2093 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2104 * inet_ntoa is thread-safe
2106 * updwtmp is moved from libutil to libc
2108 * rewrite of cbrt function
2110 * update of timezone data
2124 * add atoll function
2126 * fix complex problems in Berkeley DB code
2128 * fix math functions
2132 * fixed lots of header problems (especially Linux/GNU specific)
2134 * dynamic loader preserves all registers
2136 * Roland McGrath provided support for handling of auxiliary objects in
2137 the ELF dynamic loader.
2139 * support for parallel builds is improved
2143 * GNU extensions are no longer declared by default. To enable them you
2144 must define the macro `_GNU_SOURCE' in your program or compile with
2147 * The library has changed from using GNU ld symbol aliases to using weak
2148 symbols where available. The ELF object file format supports weak
2149 symbols; GNU ld also supports weak symbols in the a.out format. (There
2150 is also now support for other GNU ld extensions in ELF. Use the
2151 `--with-elf' option to configure to indicate you have ELF, and
2152 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2153 of many files which contained only symbol aliases, reducing the size of
2154 the source and the compiled library; many other files were renamed to
2155 less cryptic names previously occupied by the symbol alias files.
2156 There is a new header file <elf.h> for programs which operate on
2157 files in the ELF format.
2159 * Converted to Autoconf version 2, so `configure' has more options.
2160 Run `configure --help' to see the details.
2162 * The library can now be configured to build profiling, highly-optimized
2163 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2164 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2165 `configure' enable building these extra libraries. The shared library is
2166 built by default when using both ELF and GNU ld. When shared libraries
2167 are enabled, the new library `-ldl' is available for arbitrary run-time
2168 loading of shared objects; its interface is defined in <dlfcn.h>. The
2169 new header file <link.h> gives access to the internals of the run-time
2170 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2171 application of same name on other systems and it provides information
2172 about dynamically linked binaries.
2174 * The C library now provides the run-time support code for profiling
2175 executables compiled with `-pg'. Programs can control the profiling code
2176 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2177 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2178 the support for this file format was contributed by David Mosberger-Tang.
2180 * The math code has been replaced with a math library based on fdlibm from
2181 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2182 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2183 functions. The math functions now reside in a separate library, so
2184 programs using them will need to use `-lm' their linking commands.
2186 * John C. Bowman contributed optimized ix87 assembler inline functions.
2188 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2189 mechanism similar to that found in Solaris 2. This is now used for the
2190 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2191 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2192 file controls what services are used for each individual database. This
2193 works by loading shared libraries with names specified in `nsswitch.conf',
2194 so service modules can be changed or added at any time without even
2195 relinking any program. Currently there are the file, db, and NIS based
2196 NSS services available.
2198 * The new functions `strtoq' and `strtouq' parse integer values from
2199 strings, like `strtol' and `strtoul', but they return `long long int' and
2200 `unsigned long long int' values, respectively (64-bit quantities).
2202 * The new functions `strtof' and `strtold' parse floating-point values from
2203 strings, like `strtod', but they return `float' and `long double' values,
2204 respectively (on some machines `double' and `long double' are the same).
2206 * Ulrich Drepper has contributed new implementations of the floating-point
2207 printing and reading code used in the `printf' family of functions and
2208 `strtod', `strtof', and `strtold'. These new functions are perfectly
2209 accurate, and much faster than the old ones.
2211 * The implementation of the POSIX locale model was completely rewritten by
2212 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2213 to compile the POSIX locale definition.
2215 * The former dummy implementations of the strcoll and strxfrm function are
2216 now replaced by fully functional code contributed by Ulrich Drepper. The
2217 collation information comes from the POSIX locale definitions.
2219 * The new header <langinfo.h> defines an interface for accessing
2220 various locale-dependent data (using the locale chosen with `setlocale').
2222 * Ulrich Drepper has contributed a new suite of functions for operation on
2223 wide-character and multibyte-character strings, in <wchar.h>;
2224 and classification and case conversion of wide characters, in <wctype.h>.
2225 These new functions are conforming to the ISO C, Amendement 1 specification.
2227 * There is now a second implementation of the standard I/O library available.
2228 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2229 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2231 * You can now use positional parameter specifications in format strings
2232 for the `printf' and `scanf' families of functions. For example,
2233 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2234 ``Number 6, Mr Jones''. This is mainly useful when providing different
2235 format strings for different languages, whose grammars may dictate
2236 different orderings of the values being printed. To support this
2237 feature, the interface for `register_printf_handler' has changed; see
2238 the header file <printf.h> for details.
2240 * The `printf' and `scanf' families of functions now understand a new
2241 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2242 to group numbers as indicated by the locale; for `scanf' and friends, this
2243 says to accept as valid only a number with all the proper grouping
2244 separators in the right places. In the default "C" locale, numbers are
2245 not grouped; but locales for specific countries will define the usual
2246 conventions (i.e. separate thousands with `,' in the US locale).
2248 * The pgrp functions have been regularized, slightly incompatibly but much
2249 less confusingly. The core functions are now `getpgid' and `setpgid',
2250 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2251 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2252 provided for compatibility. There is no longer an incompatible `getpgrp'
2253 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2255 * The new header file <fts.h> and suite of functions simplify programs that
2256 operate on directory trees. This code comes from 4.4 BSD.
2258 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2259 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2260 NSS scheme used in glibc.
2262 * There is a new malloc debugging hook `__memalign_hook'.
2264 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2265 `unsigned int' in <sys/types.h>. These are for compatibility only and
2266 their use is discouraged.
2268 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2269 done differently, so that it works even without GNU ld.
2271 * New function `euidaccess' checks allowed access to a file like `access',
2272 but using the effective IDs instead of the real IDs.
2274 * The time zone data files have been updated for the latest and greatest
2275 local time conventions of the countries of the world.
2277 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2280 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2281 for formatting floating-point numbers. They are provided only for
2282 compatibility; new programs should use `sprintf' instead. There are
2283 also equivalent function for the `long double' floating-point type and
2284 all functions also exist in a reentrant form.
2286 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2287 functions for maintaining the login-record files (primarily of use to
2288 system programs such as `login'), and convenient functions for
2289 allocating and initializing a pseudo-terminal (pty) device.
2291 * Ulrich Drepper has contributed new support for System V style
2292 shared memory and IPC on systems that support it.
2294 * Ulrich Drepper has contributed several miscellaneous new functions found
2295 in System V: The `hsearch' family of functions provide an effective
2296 implementation of hash tables; `a64l' and `l64a' provide a very simple
2297 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2300 * Ulrich Drepper has contributed new reentrant counterparts for the
2301 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2303 * Ulrich Drepper has contributed new, highly-optimized versions of several
2304 string functions for the i486/Pentium family of processors.
2306 * Ulrich Drepper has updated the Linux-specific code, based largely
2307 on work done in Hongjiu Lu's version of GNU libc for Linux.
2308 The GNU library now supports Linux versions 2.0.10 and later,
2309 using the ELF object file format (i[3456]86-*-linux).
2311 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2313 * David Mosberger-Tang and Richard Henderson have ported the C library
2314 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2315 dynamic linking support for ELF/Alpha.
2317 * Richard Henderson contributed several Alpha optimized assembler function
2318 for arithmetic and string handling.
2320 * Ulrich Drepper has contributed a new set of message catalog functions to
2321 support multiple languages using the <libintl.h> interface, for use with
2322 his new package GNU gettext. Translation volunteers have contributed
2323 catalogs of the library's messages in Spanish, German, and Korean.
2325 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2326 program and the `catgets' function for reading the catalog files it
2327 creates. (The <libintl.h> interface is preferred; we include the
2328 <nl_types.h> interface using `catgets' only for source compatibility with
2329 programs already written to use it.)
2331 * New header file <values.h> gives SVID-compatible names for <limits.h>
2334 * Various new macros, declarations, and small header files for compatibility
2337 * New function `group_member' is a convenient way to check if a process has
2338 a given effective group ID.
2340 * When using GCC 2.7 and later, the socket functions are now declared in a
2341 special way so that passing an argument of type `struct sockaddr_in *',
2342 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2343 `struct sockaddr *' type, does not generate a type-clash warning.
2345 * New function `error' declared in header file <error.h> is a convenient
2346 function for printing error messages and optionally exiting; this is the
2347 canonical function used in GNU programs. The new functions `err', `warn',
2348 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2349 doing the same thing.
2351 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2352 POSIX.2 `glob' function to do ~ and {...} expansion.
2354 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2355 `clearenv' which is used in POSIX.9 is also available.
2357 * New function `getsid' returns session ID number on systems that support it.
2359 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2360 files <db.h> and <mpool.h> provide a rich set of functions for several
2361 types of simple databases stored in memory and in files, and <ndbm.h> is
2362 an old `ndbm'-compatible interface using the `db' functions. Link with
2363 `-ldb' to get these functions.
2365 * New macro `strdupa' copies a string like `strdup', but uses local stack
2366 space from `alloca' instead of dynamic heap space from `malloc'.
2368 * New function `strnlen' is like `strlen' but searches only a given maximum
2369 number of characters for the null terminator. `stpncpy', `strndup' and
2370 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2373 * New function `statfs' in header <sys/statfs.h>.
2375 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2376 provide convenient functions for operating on blocks of null-terminated
2379 * A new suite of functions in <utmp.h> handle all the details of reading
2380 and writing the utmp file.
2382 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2385 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2386 completely POSIX compliant and also implemented the extended functionality
2387 to handle alternate digit representation and alternate era date formats.
2389 * Ulrich Drepper provided an implementation of the `strptime' function
2390 defined in XPG4.2 which transforms a string into a `struct tm' value.
2392 * Paul Eggert provided the tzselect shell script as part of the timezone
2393 code. The shell script makes it easy to select the correct timezone
2396 * The implementation of the malloc family of functions is completely replaced
2397 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2398 The implementation uses the mmap function (if available) and it is
2399 optimized for the use in multi threaded programs.
2401 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2402 functions. This new functionality is usable by specifying a special
2403 salt string and it is compatible with implementation on *BSD systems.
2405 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2406 `getsubopt' to handle second level command line options, `bsd_signal'
2407 to access BSD style `signal' functionality, the obsolete `regexp' style
2410 * the `lchown' function is available on system which support this
2413 * The implementation of the shadow password handling function was contributed
2416 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2418 * POSIX.1g support was added. The <sys/select.h> header is available,
2419 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2420 implementation of `getaddrinfo'.
2424 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2426 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2427 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2429 * The new function `daemon' from 4.4 BSD is useful for server programs that
2430 want to put themselves in the background.
2432 * Joel Sherrill has contributed support for several standalone boards that
2433 run without an operating system.
2435 * `printf', `scanf' and friends now accept a `q' type modifier for long
2436 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2438 * All of the code taken from BSD (notably most of the math and networking
2439 routines) has been updated from the BSD 4.4-Lite release.
2441 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2443 * The new functions `getdomainname' and `setdomainname' fetch or change the
2444 YP/NIS domain name. These are system calls which exist on systems which
2447 * The time zone data files have been updated for the latest international
2450 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2451 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2455 * The C library now includes support for Sun RPC, from Sun's free
2456 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2457 are included. (There is still no support for YP.)
2459 * Tom Quinn has contributed a port of the C library to SGI machines running
2460 Irix 4 (mips-sgi-irix4).
2462 * The new `lockf' function is a simplified interface to the locking
2463 facilities of `fcntl', included for compatibility.
2465 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2467 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2469 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2472 * The error message printed by `assert' for a failed assertion now includes
2473 the name of the program (if using GNU ld) and the name of the calling
2474 function (with versions of GCC that support this).
2476 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2478 * The library now includes the <sys/mman.h> header file and memory
2479 management functions `mmap', `munmap', `mprotect', `msync', and
2480 `madvise', on systems that support those facilities.
2482 * The interface for `mcheck' has changed slightly: the function called to
2483 abort the program when an allocation inconsistency is detected now takes
2484 an argument that indicates the type of failure. The new function
2485 `mprobe' lets you request a consistency check for a particular block at
2486 any time (checks are normally done only when you call `free' or `realloc'
2489 * It is now possible to easily cross-compile the C library, building on one
2490 system a library to run on another machine and/or operating system. All
2491 you need to do is set the variable `HOST_CC' in `configparms' to the
2492 native compiler for programs to run on the machine you are building on (a
2493 few generator programs are used on Unix systems); set `CC' to the
2496 * The new function `fexecve' (only implemented on the GNU system) executes
2497 a program file given a file descriptor already open on the file.
2501 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2502 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2504 * You can set the variable `libprefix' in `configparms' to specify a prefix
2505 to be prepended to installed library files; this makes it easy to install
2506 the GNU C library to be linked as `-lgnuc' or whatever.
2508 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2509 copies a limited number of characters from a string, and returns the
2510 address of the last character written.
2512 * You no longer need to check for whether the installed `stddef.h' is
2513 compatible with the GNU C library. configure now checks for you.
2515 * You can now define a per-stream `fileno' function to convert the
2516 stream's cookie into an integral file descriptor.
2518 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2519 allocates zero bytes of storage, and returns a unique pointer which
2520 you can pass to `realloc' or `free'. The behavior is undefined if
2521 you dereference this pointer.
2523 * The C library now runs on Sony NEWS m68k machines running either
2524 NewsOS 3 or NewsOS 4.
2526 * The new `syscall' function is a system-dependent primitive function
2527 for invoking system calls. It has the canonical behavior on Unix
2528 systems, including unreliable return values for some calls (such as
2529 `pipe', `fork' and `getppid').
2531 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2532 to `EAGAIN', which is the preferred name. On systems whose kernels
2533 use two distinct codes, the C library now translates EWOULDBLOCK to
2534 EAGAIN in every system call function.
2538 * The GNU C Library Reference Manual is now distributed with the library.
2539 `make dvi' will produce a DVI file of the printed manual.
2540 `make info' will produce Info files that you can read on line using C-h i
2541 in Emacs or the `info' program.
2542 Please send comments on the manual to bug-glibc-manual@gnu.org.
2544 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2546 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2548 * Jason Merrill has contributed a port to the Sequent Symmetry running
2549 Dynix version 3 (i386-sequent-dynix).
2551 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2552 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2554 * New function `memory_warnings' lets you arrange to get warnings when
2555 malloc is running out of memory to allocate, like Emacs gives you.
2557 * The C library now contains the relocating allocator used in Emacs 19 for
2558 its editing buffers. This allocator (ralloc) minimizes allocation
2559 overhead and fragmentation by moving allocated regions around whenever it
2560 needs to. You always refer to a ralloc'd region with a "handle" (a
2561 pointer to a pointer--an object of type `void **').
2563 * There is a new `printf' format: `%m' gives you the string corresponding
2564 to the error code in `errno'.
2566 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2567 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2568 pass, the `a' modifier says to fill in a `char **' you pass with a
2571 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2572 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2573 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2575 * `mkstemp' is a traditional Unix function to atomically create and open a
2576 uniquely-named temporary file.
2580 * The standard location for the file that says what the local timezone is
2581 has changed again. It is now `/usr/local/etc/localtime' (or more
2582 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2584 * The distribution no longer contains any files with names longer than 14
2587 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2588 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2590 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2594 * The configuration process has changed quite a bit. The `configure'
2595 script is now used just like the configuration scripts for other GNU
2596 packages. The `sysdeps' directory hierarchy is much rearranged.
2597 The file `INSTALL' explains the new scheme in detail.
2599 * The header files no longer need to be processed into ANSI C and
2600 traditional C versions. There is just one set of files to install, and
2601 it will work with ANSI or old C compilers (including `gcc -traditional').
2603 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2604 MIPS DECStation running Ultrix 4.
2606 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2607 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2608 made itself into a shared library.
2610 * Yet further improved support for the i386, running 4.3 BSD-like systems
2611 (such as Mach 3 with the Unix single-server), or System V.
2613 * New function `strncasecmp' to do case-insensitive string comparison
2614 with limited length.
2616 * New function `strsep' is a reentrant alternative to `strtok'.
2618 * New functions `scandir' and `alphasort' for searching directories.
2620 * New function `setenv' is a better interface to `putenv'.
2622 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2623 function for traversing a directory tree.
2625 * The GNU obstack package is now also part of the C library.
2626 The new function `open_obstack_stream' creates a stdio stream that
2627 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2628 formatted output directly to an obstack.
2630 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2631 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2633 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2635 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2636 things to your strings.
2638 * There are some new test programs: test-fseek, testmb, and testrand.
2640 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2641 These ports are not finished, but are a good starting place for really
2642 supporting those systems.
2644 * `/etc/localtime' is now the standard location for the file that says what
2645 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2646 This follows the general principle that `/etc' is the place for all local
2647 configuration files.
2649 * The C library header files now use `extern "C"' when used by the C++
2650 compiler, so the C library should now work with C++ code.
2652 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2653 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2656 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2657 function which uses the `merge sort' algorithm, and is said to be
2658 significantly faster than the old GNU `qsort' function. Merge sort is
2659 now the standard `qsort' function. The new algorithm can require a lot
2660 of temporary storage; so, the old sorting function is called when the
2661 required storage is not available.
2663 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2664 provides the Unix `crypt' function, plus some other entry points.
2666 * The code and header files taken from 4.4 BSD have been updated with the
2667 latest files released from Berkeley.
2669 ----------------------------------------------------------------------
2670 Copyright information:
2672 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2674 Permission is granted to anyone to make or distribute verbatim copies
2675 of this document as received, in any medium, provided that the
2676 copyright notice and this permission notice are preserved,
2677 thus giving the recipient permission to redistribute in turn.
2679 Permission is granted to distribute modified versions
2680 of this document, or of portions of it,
2681 under the above conditions, provided also that they
2682 carry prominent notices stating who last changed them.
2685 version-control: never