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:
12 887, 2542, 2543, 2558, 2898, 4404, 6803, 10432, 14341, 14912, 15367,
13 15384, 15470, 15491, 15786, 15918, 16068, 16141, 16171, 16296, 16347,
14 16399, 16415, 16422, 16517, 16519, 16520, 16521, 16620, 16734, 16973,
15 16985, 17118, 17243, 17244, 17250, 17404, 17441, 17787, 17886, 17887,
16 17905, 18084, 18086, 18240, 18265, 18370, 18421, 18480, 18525, 18595,
17 18589, 18610, 18611, 18618, 18647, 18661, 18674, 18675, 18681, 18699,
18 18724, 18743, 18757, 18778, 18781, 18787, 18789, 18790, 18795, 18796,
19 18803, 18820, 18823, 18824, 18825, 18857, 18863, 18870, 18872, 18873,
20 18875, 18887, 18918, 18921, 18928, 18951, 18952, 18953, 18956, 18961,
21 18966, 18967, 18969, 18970, 18977, 18980, 18981, 18982, 18985, 19003,
22 19007, 19012, 19016, 19018, 19032, 19046, 19048, 19049, 19050, 19059,
23 19071, 19074, 19076, 19077, 19078, 19079, 19085, 19086, 19088, 19094,
24 19095, 19124, 19125, 19129, 19134, 19137, 19156, 19174, 19181.
26 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
27 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
28 unnecessary serialization of memory allocation requests across threads.
29 The defect is now corrected. Users should see a substantial increase in
30 the concurent throughput of allocation requests for applications which
31 trigger this bug. Affected applications typically create create and
32 destroy threads frequently. (Bug 19048 was reported and analyzed by
35 * There is now a --disable-timezone-tools configure option for disabling the
36 building and installing of the timezone related utilities (zic, zdump, and
37 tzselect). This is useful for people who build the timezone data and code
38 independent of the GNU C Library.
40 * The LD_POINTER_GUARD environment variable can no longer be used to
41 disable the pointer guard feature. It is always enabled.
43 * The obsolete header <regexp.h> has been removed. Programs that require
44 this header must be updated to use <regex.h> instead.
46 * Optimized string, wcsmbs and memory functions for IBM z13.
47 Implemented by Stefan Liebler.
49 * The minimum GCC version that can be used to build this version of the GNU
50 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
51 still be used to compile programs using the GNU C Library.
55 * The following bugs are resolved with this release:
57 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
58 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
59 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
60 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
61 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
62 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
63 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
64 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
65 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
66 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
67 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
68 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
69 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
70 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
71 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
72 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
73 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
74 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
75 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
76 18657, 18676, 18694, 18696, 18887.
78 * Cache information can be queried via sysconf() function on s390 e.g. with
79 _SC_LEVEL1_ICACHE_SIZE as argument.
81 * A buffer overflow in gethostbyname_r and related functions performing DNS
82 requests has been fixed. If the NSS functions were called with a
83 misaligned buffer, the buffer length change due to pointer alignment was
84 not taken into account. This could result in application crashes or,
85 potentially arbitrary code execution, using crafted, but syntactically
86 valid DNS responses. (CVE-2015-1781)
88 * The time zone file parser has been made more robust against crafted time
89 zone files, avoiding heap buffer overflows related to the processing of
90 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
91 large time zone data files. Overly long time zone specifiers in the TZ
92 variable no longer result in stack overflows and crashes.
94 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
95 for LD and GD on x86 and x86-64, has been implemented. You will need
96 binutils-2.24 or later to enable this optimization.
98 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
99 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
100 Hat). These updates cause user visible changes, such as the fix for bug
103 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
104 and getXXbyYY NSS calls for the same database, causing a denial-of-service
105 condition in some applications.
107 * Added vector math library named libmvec with the following vectorized x86_64
108 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
110 The library can be disabled with --disable-mathvec. Use of the functions is
111 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
112 Shared library libmvec.so is linked in as needed when using -lm (no need to
113 specify -lmvec explicitly for not static builds).
114 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
116 * A new fmemopen implementation has been added with the goal of POSIX
117 compliance. The new implementation fixes the following long-standing
118 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
119 old implementation is still present for use be by existing binaries.
121 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
122 releases. It has been fixed to match 2.19 and older, but binaries built
123 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
125 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
126 Contributed by Roland McGrath (Google).
128 * The header <regexp.h> is deprecated, and will be removed in a future
129 release. Use of this header will trigger a deprecation warning.
130 Application developers should update their code to use <regex.h> instead.
132 This header was formerly part of SUS, but was deprecated in 1994 and
133 removed from the standard in 2001. Also, the glibc implementation
134 leaks memory. See BZ#18681 for more details.
138 * The following bugs are resolved with this release:
140 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
141 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
142 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
143 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
144 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
145 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
146 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
147 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
148 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
149 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
152 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
153 too little memory for the to-be-scanned arguments and overflow the
154 allocated buffer. The implementation now correctly computes the required
155 buffer size when using malloc, and switches to malloc from alloca as
158 * A new semaphore algorithm has been implemented in generic C code for all
159 machines. Previous custom assembly implementations of semaphore were
160 difficult to reason about or ensure that they were safe. The new version
161 of semaphore supports machines with 64-bit or 32-bit atomic operations.
162 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
163 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
165 * Port to Altera Nios II has been contributed by Mentor Graphics.
167 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
168 implementations for powerpc64/powerpc64le.
169 Implemented by Adhemerval Zanella (IBM).
171 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
172 and powerpc64le. This may improve lock scaling of existing programs on
173 HTM capable systems. The lock elision code is only enabled with
174 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
175 powerpc will issue a transaction abort on every syscall to avoid side
176 effects being visible outside transactions.
178 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
179 AArch64. Contributed by ARM Ltd.
181 * i386 memcpy functions optimized with SSE2 unaligned load/store.
183 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
184 under certain input conditions resulting in the execution of a shell for
185 command substitution when the application did not request it. The
186 implementation now checks WRDE_NOCMD immediately before executing the
187 shell and returns the error WRDE_CMDSUB as expected.
189 * CVE-2012-3406 printf-style functions could run into a stack overflow when
190 processing format strings with a large number of format specifiers.
192 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
193 infinite loop if the DNS response contained a PTR record of an unexpected
196 * The minimum GCC version that can be used to build this version of the GNU
197 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
198 still be used to compile programs using the GNU C Library.
200 * The GNU C Library is now built with -Werror by default. This can be
201 disabled by configuring with --disable-werror.
203 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
205 * The obsolete sigvec function has been removed. This was the original
206 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
207 programs have been using instead for about 25 years. Of course, ABI
208 compatibility for old binaries using sigvec remains intact.
210 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
211 with newer versions of bison.
213 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
214 The original MIPS o32 hard-float ABI requires an FPU where double-precision
215 registers overlay two consecutive single-precision registers. MIPS32R2
216 introduced a new FPU mode (FR=1) where double-precision registers extend the
217 corresponding single-precision registers which is incompatible with the
218 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
219 require the use of FR=1 making a transition necessary. New o32 ABI
220 extensions enable users to migrate over time from the original o32 ABI
221 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
222 tracks the ABI of any loaded object and verifies that new objects are
223 compatible. Mode transitions will also be requested as required and
224 unsupportable objects will be rejected. The ABI checks include both soft and
225 hard float ABIs for o32, n32 and n64.
227 GCC 5 with GNU binutils 2.25 onwards:
228 It is strongly recommended that all o32 system libraries are built using the
229 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
230 with the original and all new o32 ABI extensions. Configure a MIPS GCC
231 compiler using --with-fp-32=xx to set this by default.
235 * The following bugs are resolved with this release:
237 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
238 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
239 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
240 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
241 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
242 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
243 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
244 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
245 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
246 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
247 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
248 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
249 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
250 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
251 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
253 * Reverted change of ABI data structures for s390 and s390x:
254 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
255 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
256 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
257 are preserved pointing straight to the same implementation as the old ones.
258 Given that, new callers will simply provide a too-big buffer to these
259 functions. Any applications/libraries out there that embed jmp_buf or
260 ucontext_t in an ABI-relevant data structure that have already been rebuilt
261 against 2.19 headers will have to rebuilt again. This is necessary in any
262 case to revert the breakage in their ABI caused by the glibc change.
264 * Support for file description locks is added to systems running the
265 Linux kernel. The standard file locking interfaces are extended to
266 operate on file descriptions, not file descriptors, via the use of
267 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
268 are associated with an open file instead of a process.
270 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
272 * The minimum Linux kernel version that this version of the GNU C Library
273 can be used with is 2.6.32.
275 * Running the testsuite no longer terminates as soon as a test fails.
276 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
277 with PASS or FAIL lines for individual tests. A summary of the results is
278 printed, including a list of failing lists, and "make check" exits with
279 error status if there were any unexpected failures. "make check
280 stop-on-test-failure=y" may be used to keep the old behavior.
282 * The am33 port, which had not worked for several years, has been removed
285 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
286 supported; they now act the same as _DEFAULT_SOURCE (but generate a
287 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
288 conflicted with POSIX (support for which was removed in 2.19), the
289 interfaces those macros enabled remain available when compiling with
290 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
293 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
295 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
296 This may improve lock scaling of existing programs on TX capable systems.
297 The lock elision code is only built with --enable-lock-elision=yes and
298 then requires a GCC version supporting the TX builtins. With lock elision
299 default mutexes are elided via __builtin_tbegin, if the cpu supports
300 transactions. By default lock elision is not enabled and the elision code
303 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
304 copy the path argument. This allowed programs to cause posix_spawn to
305 deference a dangling pointer, or use an unexpected pathname argument if
306 the string was modified after the posix_spawn_file_actions_addopen
309 * All supported architectures now use the main glibc sysdeps directory
310 instead of some being in a separate "ports" directory (which was
311 distributed separately before glibc 2.17).
313 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
314 On configurations that support it (all Linux configurations), it's now
315 used regardless of the --enable-add-ons switch to configure. It is no
316 longer possible to build such configurations without pthreads support.
318 * Locale names, including those obtained from environment variables (LANG
319 and the LC_* variables), are more tightly checked for proper syntax.
320 setlocale will now fail (with EINVAL) for locale names that are overly
321 long, contain slashes without starting with a slash, or contain ".." path
322 components. (CVE-2014-0475) Previously, some valid locale names were
323 silently replaced with the "C" locale when running in AT_SECURE mode
324 (e.g., in a SUID program). This is no longer necessary because of the
327 * On x86-64, the dynamic linker's lazy-binding support is now compatible
328 with application code using Intel MPX instructions. (With all previous
329 versions, the MPX register state could be clobbered when making calls
330 into or out of a shared library.) Note that while the new dynamic
331 linker is compatible with all known x86 hardware whether or not it
332 supports Intel MPX, some x86 instruction-set emulators might fail to
333 handle the new instruction encodings. This is known to affect Valgrind
334 versions up through 3.9 (but will be fixed in the forthcoming 3.10
335 release), and might affect other tools that do instruction emulation.
337 * Support for loadable gconv transliteration modules has been removed.
338 The support for transliteration modules has been non-functional for
339 over a decade, and the removal is prompted by security defects. The
340 normal gconv conversion modules are still supported. Transliteration
341 with //TRANSLIT is still possible, and the //IGNORE specifier
342 continues to be supported. (CVE-2014-5119)
344 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
345 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
346 resulting a denial-of-service security vulnerability in applications which
347 use functions related to iconv. (CVE-2014-6040)
351 * The following bugs are resolved with this release:
353 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
354 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
355 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
356 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
357 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
358 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
359 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
360 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
361 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
362 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
363 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
364 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
365 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
366 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
367 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
368 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
369 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
370 16431, 16453, 16474, 16506, 16510, 16529
372 * Slovenian translations for glibc messages have been contributed by the
373 Translation Project's Slovenian team of translators.
375 * The public headers no longer use __unused nor __block. This change is to
376 support compiling programs that are derived from BSD sources and use
377 __unused internally, and to support compiling with Clang's -fblock
378 extension which uses __block.
380 * CVE-2012-4412 The strcoll implementation caches indices and rules for
381 large collation sequences to optimize multiple passes. This cache
382 computation may overflow for large collation sequences and may cause a
383 stack or buffer overflow. This is now fixed to use a slower algorithm
384 which does not use a cache if there is an integer overflow.
386 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
387 rules for large collation sequences to optimize multiple passes and falls
388 back to alloca if malloc fails, resulting in a possible stack overflow.
389 The implementation now falls back to an uncached collation sequence lookup
392 * CVE-2013-4788 The pointer guard used for pointer mangling was not
393 initialized for static applications resulting in the security feature
394 being disabled. The pointer guard is now correctly initialized to a
395 random value for static applications. Existing static applications need
396 to be recompiled to take advantage of the fix (bug 15754).
398 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
399 to the d_name member of struct dirent, or omit the terminating NUL
400 character. (Bugzilla #14699).
402 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
403 aligned_alloc functions could allocate too few bytes or corrupt the
404 heap when passed very large allocation size values (Bugzilla #15855,
407 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
408 for AF_INET6 has been fixed (Bugzilla #16072).
410 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
411 pap_CW, quz_PE, the_NP.
413 * Substantially revised locales: gd_GB, ht_HT
415 * The LC_ADDRESS field was updated to support country_car for almost all
418 * ISO 1427 definitions were updated.
420 * ISO 3166 definitions were updated.
422 * The localedef utility now supports --big-endian and --little-endian
423 command-line options to generate locales for a different system from that
424 for which the C library was built.
426 * Binary locale files now only depend on the endianness of the system for
427 which they are generated and not on other properties of that system. As a
428 consequence, binary files generated with new localedef may be incompatible
429 with old versions of the GNU C Library, and binary files generated with
430 old localedef may be incompatible with this version of the GNU C Library,
431 in the following circumstances:
433 + Locale files may be incompatible on m68k systems.
435 + Locale archive files (but not separate files for individual locales) may
436 be incompatible on systems where plain "char" is signed.
438 * The configure option --disable-versioning has been removed. Builds with
439 --disable-versioning had not worked for several years.
441 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
442 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
444 * SystemTap probes for malloc have been introduced.
446 * SystemTap probes for slow multiple precision fallback paths of
447 transcendental functions have been introduced.
449 * Support for powerpc64le has been added.
451 * The soft-float powerpc port now supports e500 processors.
453 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
455 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
456 set of header declarations that are enabled by default, even when other
457 feature test macros or compiler options such as -std=c99 would otherwise
458 disable some of those declarations.
460 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
461 conflict with POSIX. The libbsd-compat library (which was a dummy library
462 that did nothing) has also been removed.
464 * Preliminary documentation about Multi-Thread, Async-Signal and
465 Async-Cancel Safety has been added.
467 * Change of ABI data structures for s390 and s390x:
468 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
469 allow for future hardware extensions. All library functions that accept or
470 return these structures were versioned in order to provide backwards
471 compatibility with existing code. However, not all cases can be handled
472 with interface versioning. If an application embeds either structure into
473 another structure and that structure is passed to another compilation unit
474 which expects the newer larger-sized object then any access to the new
475 fields will result in undefined behaviour. Similarly any access to fields
476 that were moved by the enlarging of the structures will cause undefined
477 behaviour. To fix the undefined behaviour all objects that are part of the
478 final in-memory image must agree on the size of structures, and this may
479 require recompilation.
483 * The following bugs are resolved with this release:
485 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
486 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
487 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
488 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
489 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
490 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
491 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
492 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
493 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
494 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
495 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
496 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
497 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
500 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
501 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
502 Distributions can re-enable building and using pt_chown via the new configure
503 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
504 considerable security risks and should only be used if the distribution
505 understands and accepts the risks.
507 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
510 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
511 fixed (Bugzilla #15330).
513 * Add support for calling C++11 thread_local object destructors on thread
514 and program exit. This needs compiler support for offloading C++11
515 destructor calls to glibc.
517 * Improved worst case performance of libm functions with double inputs and
520 * Support for priority inherited mutexes in pthread condition variables on
521 non-x86 architectures.
523 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
525 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
527 * Optimized string functions for ARM. Implemented by Will Newton and
530 * Optimized libm functions for SPARC. Implemented by David S. Miller.
532 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
535 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
536 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
538 * Added a benchmark framework to track performance of functions in glibc.
540 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
541 It is based on draft TS 18661 and currently enabled as a GNU extension.
543 * On Linux, the clock function now uses the clock_gettime system call
544 for improved precision, rather than old times system call.
546 * Added support for version-3 tz format files. This is needed when using
547 the tz database release 2013e or later, and affects a few unusual cases --
548 currently only TZ='America/Godthab' for time stamps after 2037.
550 * Added new API functions pthread_getattr_default_np and
551 pthread_setattr_default_np to get and set the default pthread
552 attributes of a process.
554 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
555 This may improve lock scaling of existing programs on TSX capable systems.
556 When the --enable-lock-elision=yes parameter is specified at configure
557 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
560 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
561 availability). Implemented by Ryan S. Arnold.
563 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
567 * The following bugs are resolved with this release:
569 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
570 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
571 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
572 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
573 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
574 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
575 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
576 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
577 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
578 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
579 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
580 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
581 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
582 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
583 14879, 14889, 14893, 14898, 14914.
585 * Optimization of memcpy for MIPS.
587 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
588 EMFILE has been fixed (Bugzilla #14889).
590 * The add-on ports collection is now distributed in the "ports" subdirectory
591 of the main GNU C Library distribution, rather than separately.
593 * Port to ARM AArch64 contributed by Linaro.
595 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
596 Optimized versions of memcpy, memset, and memcmp added for System z10 and
598 Implemented by Andreas Krebbel.
600 * The new function secure_getenv allows secure access to the environment,
601 returning NULL if running in a SUID/SGID process. This function replaces
602 the internal function __secure_getenv.
604 * SystemTap static probes have been added into the dynamic linker.
605 Implemented by Gary Benson.
607 * Optimizations of string functions strstr, strcasestr and memmem.
608 Implemented by Maxim Kuvyrkov.
610 * The minimum Linux kernel version that this version of the GNU C Library
611 can be used with is 2.6.16.
613 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
614 powerpc POWER7. Implemented by Will Schmidt.
616 * New configure option --disable-nscd builds the C library such that it
617 never attempts to contact the Name Service Caching Daemon (nscd).
618 New configure option --disable-build-nscd avoids building nscd itself;
619 this is the default if --disable-nscd is used.
621 * Improved support for cross-compilation, including cross-testing and
622 bootstrap builds without a previously built glibc.
624 * Several testsuite tests are now able to test multiple IFUNC variants of an
625 interface, rather than just testing the one that would be chooen by
628 * New configure options --with-bugurl and --with-pkgversion, for
629 distributors to use to embed their bug-reporting and package version
630 information in --help and --version output.
632 * The ttyname and ttyname_r functions on Linux now fall back to searching for
633 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
634 allows creation of chroots without the procfs mounted on /proc.
636 * The `crypt' function now fails if passed salt bytes that violate the
637 specification for those values. On Linux, the `crypt' function will
638 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
639 enabled, and fail on encrypted strings using the MD5 or DES algorithm
640 when the mode is enabled.
642 * The `clock_*' suite of functions (declared in <time.h>) is now available
643 directly in the main C library. Previously it was necessary to link with
644 -lrt to use these functions. This change has the effect that a
645 single-threaded program that uses a function such as `clock_gettime' (and
646 is not linked with -lrt) will no longer implicitly load the pthreads
647 library at runtime and so will not suffer the overheads associated with
648 multi-thread support in other code such as the C++ runtime library.
650 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
655 * The following bugs are resolved with this release:
657 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
658 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
659 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
660 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
661 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
662 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
663 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
664 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
665 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
666 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
667 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
668 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
669 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
670 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
671 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
672 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
673 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
674 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
675 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
676 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
677 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
678 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
681 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
682 configuring glibc with:
683 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
684 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
685 Implemented by H.J. Lu.
689 + define static_assert
691 + do not declare gets
693 + declare at_quick_exit and quick_exit also for ISO C11
695 + aligned_alloc. NB: The code is deliberately allows the size parameter
696 to not be a multiple of the alignment. This is a moronic requirement
697 in the standard but it is only a requirement on the caller, not the
702 + uchar.h support added
704 + CMPLX, CMPLXF, CMPLXL added
706 Implemented by Ulrich Drepper.
708 * Support for the IA-64 has been moved to ports.
710 * Remove support for anything but ELF binary format
712 * Checking versions of poll, ppoll added.
713 Implemented by Ulrich Drepper.
715 * More generic and 64-bit performance optimizations to math functions.
716 Implemented by Ulrich Drepper.
718 * New configure option --enable-obsolete-rpc makes the deprecated RPC
719 headers and functions available at compile time as they were before
720 version 2.14. This option will be removed at some time in the future
721 after the TI-RPC library becomes fully sufficient for the needs of
722 existing applications.
724 * Compatibility code for Linux kernel versions before 2.4 has been removed.
725 Note that glibc is not expected to work with any Linux kernel version
728 * New header <sys/auxv.h> and function getauxval allowing easy access to
729 the AT_* key-value pairs passed from the Linux kernel. The header also
730 defines the HWCAP_* bits associated with the AT_HWCAP key.
732 * New locales: mag_IN
734 * New configure option --enable-systemtap builds SystemTap static probes
735 into libc for setjmp and longjmp and into libpthread for various operations.
736 So far the setjmp/longjmp probes and some of the libpthread probes are
737 provided only for i*86 and x86_64.
738 Implemented by Roland McGrath and Rayson Ho.
740 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
742 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
745 * More optimized functions for SPARC. Implemented by David S. Miller.
747 * Improved support for cross-compilation, especially bootstrap builds
748 without a previously built glibc.
750 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
751 Chris Metcalf from Tilera.
753 * Support for the old ARM ABI has been removed from ports. Only the EABI is
754 now supported for ARM processors.
756 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
757 as the name of the dynamic linker, to distinguish it from the
758 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
760 * Support for CRIS has been removed from ports.
762 * A new class of installed header has been documented for low-level
763 platform-specific functionality. PowerPC added the first instance with a
764 function to provide time base register access. Contributed by Tulio
765 Magno Quites Machado Filho.
767 * ix86 configurations now install header files that are consistent with
768 what x86-64 configurations install. These same header files can be used
769 for -m32, -m64, or -mx32 builds.
770 Contributed by H.J. Lu.
772 * Math library bug fixes. A thorough audit of all open math library bugs was
773 conducted by Joseph Myers. Significant progress was made on many math
774 library bugs resulting in more accurate exceptions and function results.
775 Many thanks to all those that contributed including Andreas Jaeger for his
776 patch review and work on the x87 trigonometric instruction issues.
778 * Timezone data is no longer installed. Timezone-related binaries and scripts
779 will continue to be installed. Users should obtain their timezone data from
780 their distribution provider or from the tzdata package at
781 <ftp://munnari.oz.au/pub/>.
785 * The following bugs are resolved with this release:
787 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
788 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
789 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
790 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
791 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
792 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
793 13484, 13506, 13515, 13523, 13524, 13538, 13540
795 * New program pldd to list loaded object of a process
796 Implemented by Ulrich Drepper.
798 * Add nss_db support back to glibc. No more dependency on Berkeley db
799 and support for initgroups lookups.
800 Implemented by Ulrich Drepper.
802 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
803 Contributed by HJ Lu.
805 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
806 Contributed by HJ Lu.
808 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
809 on x86-32 and x86-64.
810 Contributed by Liubov Dmitrieva.
812 * Optimized strchr and strrchr for SSE on x86-32.
813 Contributed by Liubov Dmitrieva.
815 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
816 for x86-64 and x86-32.
817 Contributed by Liubov Dmitrieva.
819 * New interfaces: scandirat, scandirat64
820 Implemented by Ulrich Drepper.
822 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
823 Implemented by Ulrich Drepper.
825 * nscd now also caches the netgroup database.
826 Implemented by Ulrich Drepper.
828 * Integrate libm with gcc's -ffinite-math-only option.
829 Implemented by Ulrich Drepper.
831 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
832 to math functions. Implemented by Ulrich Drepper.
834 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
835 Implemented by Ulrich Drepper.
837 * New Linux interfaces: process_vm_readv, process_vm_writev
839 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
840 Implemented by Ulrich Drepper.
842 * Optimized nearbyint and strcasecmp for PPC.
843 Implemented by Adhemerval Zanella.
845 * New locales: bho_IN, unm_US, es_CU, ta_LK
849 * The following bugs are resolved with this release:
851 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
852 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
853 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
854 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
855 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
856 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
857 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
858 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
859 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
860 12795, 12811, 12813, 12814, 12841
862 * The RPC implementation in libc is obsoleted. Old programs keep working
863 but new programs cannot be linked with the routines in libc anymore.
864 Programs in need of RPC functionality must be linked against TI-RPC.
865 The TI-RPC implementation is IPv6 enabled and there are other benefits.
867 Visible changes of this change include (obviously) the inability to link
868 programs using RPC functions without referencing the TI-RPC library and the
869 removal of the RPC headers from the glibc headers.
870 Implemented by Ulrich Drepper.
872 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
873 syncfs, setns, sendmmsg
875 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
876 yue_HK, lij_IT, mhr_RU
878 * New encodings: CP770, CP771, CP772, CP773, CP774
880 * New program sotruss to trace calls through PLTs
881 Implemented by Ulrich Drepper.
883 * The malloc hook implementation is marked deprecated and will be removed
884 from the default implementation in the next version. The design never
885 worked ever since the introduction of threads. Even programs which do
886 not create threads themselves can use multiple threads created internally.
890 * The following bugs are resolved with this release:
892 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
893 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
894 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
895 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
898 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
900 * POWER7 optimizations: memset, memcmp, strncmp
902 * New optimized string functions for x86-64: strnlen (SSE2),
903 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
904 Implemented by Ulrich Drepper.
908 * The following bugs are resolved with this release:
910 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
911 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
912 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
913 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
914 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
915 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
916 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
917 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
919 * New interfaces: pthread_getname_np, pthread_setname_np
921 * New Linux interface: recvmmsg
923 * STT_GNU_IFUNC implemented for Sparc by David Miller.
925 * The dynamic linker now recognizes supported ABI versions from the
926 EI_ABIVERSION field in the ELF header.
927 Implemented by Ulrich Drepper.
929 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
930 will not be used to fill in password fields in the passwd.byname replies.
931 Instead it is used to synthesize the shadow.byname table, should it be
932 missing. This is a useful mode in some installations involving Solaris.
933 Implemented by Ulrich Drepper.
935 * New locales: kok_IN, sq_MK, cv_RU
939 * The following bugs are resolved with this release:
941 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
942 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
943 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
944 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
945 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
946 10789, 10817, 10823, 10840, 10847
948 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
950 Implemented by Ulrich Drepper.
952 * Checking version of longjmp added that fails if an uninitialized stack
953 frame would be created. Implemented by Ulrich Drepper.
955 * STT_GNU_IFUNC is now supported in static executables.
956 Implemented by H.J. Lu.
958 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
960 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
961 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
962 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
963 Contributed by H.J. Lu.
965 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
966 Implemented by Ulrich Drepper.
968 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
970 Contributed by H.J. Lu.
972 * Support for fma instruction in AVX on x86-64.
973 Implemented by H.J. Lu and Ulrich Drepper.
975 * AVX support in x86-64 auditing support in ld.so.
976 Implemented by H.J. Lu.
978 * STB_GNU_UNIQUE support added.
979 Implemented by Ulrich Drepper.
981 * Implement second fallback mode for optimized DNS lookup for even more
982 broken environments. If two requests from the same port are not
983 handled correctly close the socket and open a new one before sending
984 the second request. The 'single-request-reopen' option in /etc/resolv.conf
985 can be used to select this mode right away, instead of rediscovering the
986 necessity is every process again.
987 Implemented by Ulrich Drepper.
989 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
990 Implemented by Adam Tkac.
992 * Optimized iconv conversions for S390x.
993 Implemented by Andreas Krebbel.
995 * Using condvars with PI mutexes is now more efficient due to kernel
996 support for requeueing to PI futexes. NPTL support added for x86-64.
997 Implemented by Ulrich Drepper.
999 * New locales: ps_AF, my_MM
1003 * The following bugs are resolved with this release:
1005 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1006 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1007 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1008 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1009 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1011 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1012 Implemented by Ulrich Drepper.
1014 * New Linux interfaces: accept4, fallocate, fallocate64.
1015 Implemented by Ulrich Drepper.
1017 * Correct declarations of string function when used in C++ code. This
1018 could lead to compile errors for invalid C++ code.
1020 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1023 * New POSIX 2008 interface: psiginfo
1024 Implemented by Ulrich Drepper.
1026 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1027 Implemented by Ulrich Drepper.
1029 * Support for selecting between multiple function definitions at runtime
1030 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1032 * The libcrypt library can now use the hash function implementations in
1033 NSS. Implemented by Ulrich Drepper.
1035 * The malloc implementation can be compiled to be less memory efficient
1036 but higher performing in multi-threaded programs.
1037 Implemented by Ulrich Drepper.
1039 * New locales: nan_TW@latin, ks_IN
1041 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1042 Implemented by Ulrich Drepper.
1044 * Extended printf hook support. It is possible to use user-defined types
1045 and extend existing format specifiers.
1046 Implemented by Ulrich Drepper.
1048 * Handling for group shadow files has been added.
1049 Implemented by Ulrich Drepper.
1051 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1052 servers (the case, e.g., for some people using the built-in DNS
1053 server in ADSL modems/routers). There is a once-per-process timeout
1054 in case of a broken server. To avoid it, users can run nscd or put
1055 'options single-request' in /etc/resolv.conf.
1056 Implemented by Ulrich Drepper.
1060 * The following bugs are resolved with this release:
1062 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1063 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1064 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1065 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1066 6968, 6974, 6980, 6995, 7008, 7009, 7029
1068 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1069 up at the same time. Implemented by Ulrich Drepper.
1071 * TLS descriptors for LD and GD on x86 and x86-64.
1072 Implemented by Alexandre Oliva.
1074 * getaddrinfo now handles DCCP and UDPlite.
1075 Implemented by Ulrich Drepper.
1077 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1078 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1079 Implemented by Ulrich Drepper.
1081 * New implementation of memmem, strstr, and strcasestr which is O(n).
1082 Implemented by Eric Blake.
1084 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1086 * Implement "e" option for popen to open file descriptor with the
1087 close-on-exec flag set. Implemented by Ulrich Drepper.
1089 * Implement "b" mode for fmemopen. In this mode writes writes don't
1090 implicitly add a NUL byte and seeks from the end of the buffer really
1091 use the buffer end, not the string length as the basis.
1092 Implemented by Ulrich Drepper.
1094 * Many functions, exported and internal, now atomically set the close-on-exec
1095 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1097 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1099 Implemented by Pravin Satpute.
1101 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1105 * The following bugs are resolved with this release:
1107 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1108 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1109 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1110 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1111 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1112 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1113 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1115 * New locales: bo_CN, bo_IN, shs_CA.
1117 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1119 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1120 Implemented by Pravin Satpute.
1122 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1124 * nscd caches now all timeouts for DNS entries
1125 Implemented by Ulrich Drepper.
1127 * nscd is more efficient and wakes up less often.
1128 Implemented by Ulrich Drepper.
1130 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1131 vdprintf, and obstack_vprintf.
1132 Implemented by Jakub Jelinek.
1134 * Faster memset for x86-64.
1135 Implemented by Harsha Jagasia and H.J. Lu.
1137 * Faster memcpy on x86.
1138 Implemented by Ulrich Drepper.
1140 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1141 Implemented by Ulrich Drepper.
1143 * Faster sqrt and sqrtf implemention for some PPC variants.
1144 Implemented by Steven Munroe.
1148 * The following bugs are resolved with this release:
1150 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1151 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1152 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1153 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1154 5071, 5103, 5104, 5112, 5113, 5184, 5186
1156 * More checking functions: fread, fread_unlocked, open*, mq_open.
1157 Implemented by Jakub Jelinek and Ulrich Drepper.
1159 * Extend fortification to C++. Implemented by Jakub Jelinek.
1161 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1162 by not recognizing 'a' as a modifier when those specs are requested.
1163 Implemented by Jakub Jelinek.
1165 * PPC optimizations to math and string functions.
1166 Implemented by Steven Munroe.
1168 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1169 options to be passed. Implemented by Ulrich Drepper.
1171 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1173 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1174 Implemented by Ulrich Drepper.
1176 * Handle private futexes in the NPTL implementation.
1177 Implemented by Jakub Jelinek and Ulrich Drepper.
1179 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1180 Implemented by Roland McGrath and Ulrich Drepper.
1182 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1184 * SHA-256 and SHA-512 based password encryption.
1185 Implemented by Ulrich Drepper.
1187 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1188 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1191 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1192 Implemented by Ulrich Drepper.
1196 * The following bugs are resolved with this release:
1198 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1199 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1200 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1201 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1202 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1203 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1204 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1207 * New Linux interfaces: epoll_pwait, sched_getcpu.
1209 * New generic interfaces: strerror_l.
1211 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1215 * The following bugs are resolved with this release:
1217 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1218 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1219 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1220 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1221 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1222 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1223 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1224 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1225 3225, 3251, 3252, 3253, 3273
1227 * For Linux, the sorting of addresses returned by getaddrinfo now also
1228 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1229 Implemented by Ulrich Drepper.
1231 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1232 Implemented by Ulrich Drepper.
1234 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1236 * New iconv module for MIK. Contributed by Alexander Shopov.
1238 * For sites with broken group and/or passwd database, the auto-propagate
1239 option of nscd can prevent creating ID lookup entries from the results
1240 of a name lookup and vice versa. This usually is no problem but some
1241 site might have problems with the default behavior.
1242 Implemented by Ulrich Drepper.
1244 * Iterating over entire database in NIS can be slow. With the
1245 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1246 to trade time for memory. The entire database will be read at once.
1247 Implemented by Ulrich Drepper.
1249 * The interfaces introduced in RFC 3542 have been implemented by
1252 * Support for the new ELF hash table format was added by Ulrich Drepper.
1254 * Support for priority inheritance mutexes added by Jakub Jelinek and
1257 * Support for priority protected mutexes added by Jakub Jelinek.
1259 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1260 or_IN, csb_PL, fy_NL, sr_ME.
1264 * More overflow detection functions.
1266 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1267 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1269 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1270 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1271 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1272 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1273 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1274 by Masahide Washizawa.
1276 * It is now possible to install audit libraries for the dynamic linker using
1277 LD_AUDIT. Implemented by Ulrich Drepper.
1279 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1280 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1281 For a libc and libpthread that works well on Linux 2.4 kernels, we
1282 recommend using the stable 2.3 branch.
1284 * The new function open_wmemstream acts like open_memstream,
1285 but uses a wchar_t wide character buffer.
1287 * The new function ppoll is an improved version of poll, similar to pselect.
1289 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1290 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1291 renameat, unlinkat, linkat, symlinkat, readlinkat.
1293 * New Linux kernel system calls: unshare,
1294 inotify_init, inotify_add_watch, inotify_rm_watch.
1296 * The euidaccess function is now also known by the alias eaccess,
1297 for compatibility with some other systems.
1299 * Timezone data updated to 2006b version.
1303 * The following bugs are resolved with this release:
1305 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1306 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1307 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1308 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1309 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1310 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1312 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1314 * As of this release, GCC 4 can be used to compile the C Library.
1316 * Timezone data updated to 2005m version.
1320 * The following bugs are resolved with this release:
1322 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1323 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1324 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1325 777, 787, 821, 822, 823, 825
1327 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1331 * Support for RFC 3678. Real implementations exist only for Linux so far.
1332 Implemented by Ulrich Drepper.
1334 * nscd can now cache entries persistently. Expiring entries are reloaded.
1335 For speedups the cache can be shared in memory with client processes.
1336 Implemented by Ulrich Drepper.
1338 * nscd can now perform SELinux checks.
1339 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1341 * getaddrinfo queries are now cached. Canonical name lookup is performed
1343 Implemented by Ulrich Drepper.
1345 * The nothrow function attribute is used when headers are used by gcc when
1346 compiling C code. This can avoid significant amounts of exception
1349 * The malloc functions perform more error checking and are stricter when
1350 it comes to reacting on errors. The default action is to terminate
1351 the process after showing an error message. Implemented by Ulrich Drepper.
1353 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1354 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1356 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1357 namespaces using the new function dlmopen(). This feature is of course,
1358 like most other dynamic loading functionality, not available in statically
1359 linked applications. Implemented by Ulrich Drepper.
1361 * Low-overhead boundary checking variants of string and some stdio functions
1362 were added. These are to be used in conjunction with a gcc patch by
1363 Jakub Jelinek which adds calls to these functions if possible.
1364 Implemented by Jakub Jelinek and Ulrich Drepper.
1366 * Old code for several operating systems and machine architectures that
1367 have not been in working condition in a long time have been removed from
1368 the main source tree maintained by the GNU C Library's maintainers.
1369 These files are now reside in the separate `ports' source module
1370 that is usable as an add-on when building the library.
1374 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1375 interrogate the dynamic linker, compatible with the Solaris interface.
1377 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1378 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1380 * getifaddrs now uses the netlink interface on Linux to get its information.
1381 Implemented by Thorsten Kukuk.
1383 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1384 Implemented by Ulrich Drepper.
1386 * support for non-executable stacks on x86 has been added. Changes mostly
1389 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1392 * getaddrinfo now performs destination address selection according to
1397 * Thread-safe interfaces for many functions that access locale data
1398 were added in version 2.3, but these features were omitted from NEWS.
1399 Many functions have variants with an `_l' suffix that take a `locale_t'
1400 object as a parameter rather than consulting the current locale.
1401 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1402 create and maintain `locale_t' objects. Additionally, the new function
1403 `uselocale' sets "the current locale" (as used by functions not so
1404 parameterized) set for an individual thread. These features were added
1405 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1407 * The functions getresuid, getresgid, setresuid, and setresgid, which
1408 have long been available on Linux, are now declared in <unistd.h>
1409 and are now also available on the Hurd.
1411 * ELF thread-local storage support (TLS) now works on x86-64.
1413 * The new dynamic string token $LIB is expanded in shared library names.
1414 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1416 * Aldy Hernandez contributed complete software floating point support for
1417 PowerPC machines with no FPU.
1419 * fexecve is implemented on Linux.
1421 * The `btowc' function should work at least twice as fast due to
1422 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1424 * With approriate thread add-ons cancelable functions are now implemented
1425 in libc.so as well. No need to call the function in libpthread. This
1426 change allowed to finally disable the incorrect and expensive handling
1427 of weak definition in ld.so.
1429 * Yet more PLT entries in libc.so have been removed. We finally arrived
1430 at the bare minimum. Startup times improved appropriately.
1432 * Support for the new Linux/x86 system call interface was added. The
1433 AT_SYSINFO auxiliary vector entry is recognized and handled.
1437 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1440 * iconv (the program and the interface) now accepts empty names (excluding
1441 options like //TRANSLIT) to mean "use charset of current locale".
1443 * localedef can now transliterate characters in strings which are not in
1444 the provided charmap. The information from the input locale is used.
1446 * Prelinking support was added for ELF targets. This requires additional
1447 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1449 * Read-only stdio streams now use mmap to speed up operation by eliminating
1450 copying and buffer underflows. To use add 'm' to the mode string of
1451 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1453 * The malloc functions were completely rewritten by Wolfram Gloger based
1454 on Doug Lea's malloc-2.7.0.c.
1456 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1457 implementation of regex.
1459 * Bruno Haible upgraded the iconv and locale implementation to support
1462 * Contents of the LC_* and LANG environment variables in the CEN style are
1463 not recognized anymore. It never was used. Change by Ulrich Drepper.
1465 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1466 thread-local storage (TLS) ABI on some platforms.
1467 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1469 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1470 EUC-JISX0213, and TSCII.
1472 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1473 BSD-compatible interface for getting all network interface addresses.
1474 Implementation for IPv4 by Roland McGrath.
1476 * Loading of locale data is faster due to the introduction of a locale
1477 archive. Implemented by Roland McGrath and Ulrich Drepper.
1479 * Startup times are significantly reduced by not using exported functions
1480 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1483 * Steven Munroe contributed a port to PowerPC64/Linux.
1487 * The Hurd now uses the GNU libio implementation of stdio rather than the
1488 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1490 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1491 with the same behavior as the Linux system call of the same name.
1495 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1496 128-bit long double format.
1498 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1499 IBM1161, and IBM1162 charsets.
1501 * Andreas Jaeger contributed a port to x86-64/Linux.
1503 * Peter Bruin contributed a port to PowerPC/Hurd.
1505 * libc functions using I/O streams now can handle wide-oriented streams
1508 * optimizations in the dynamic linker. Binaries created by recent binutils
1509 versions start up quicker due to reduced time spent on relocations.
1511 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1515 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1516 asinh, atanh, j0 for the 128-bit long double format.
1518 * Bruno Haible updated all the code handling Unicode in some form to
1519 support Unicode 3.1.
1521 * Speed of regex for single-byte locales is back to previous levels.
1522 Patch by Isamu Hasegawa.
1524 * Alpha, SPARC, and IA-64 now also using floating stacks.
1526 * Startup time of internationalized applications greatly improved through
1527 iconv cache. Use iconvconfig to generate the cache file.
1528 Contributed by Ulrich Drepper.
1530 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1531 severe performance problems. Patch by David Mosberger.
1533 * The Hurd port got a lot more functionality like AIO, various stdio
1534 extensions, etc. Mainly done by Roland McGrath.
1536 * mtrace can now lookup symbols in shared libraries.
1540 * Intel's IA-64 math library is largely integrated. It provides fast and
1541 accurate implementatations for most basic and standard math functions
1542 in float, double, and long double format.
1544 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1545 and asin for the 96-bit long double format and asin, log, tan for the
1546 128-bit long double format.
1548 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1549 The basic double functions exist today. Contributed by Abraham Ziv
1550 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1551 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1553 * An asynchronous name lookup library was added. The interface is designed
1554 after POSIX AIO. The proposal was circulated beforehand to get comments.
1555 No negative ones came in. Implemented by Ulrich Drepper.
1557 * Port to S390/64bit contributed by Martin Schwidefsky
1558 <schwidefsky@de.ibm.com>.
1560 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1561 of functions for Linux/IA-64.
1563 * The RPC code is now thread safe. Threads can now use the same service
1564 of different services at the same time. Patch by Eric Norum
1565 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1567 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1568 family of functions for Linux/S390.
1570 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1571 of functions for Linux/x86.
1573 * Port to Linux/CRIS contributed by Axis Communications.
1577 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1578 we can now check for namespace violations and missing declarations. The
1579 result is that almost all headers are now Unix-compliant (as defined in
1580 the upcoming XPG6). The negative side is that some programs might need
1581 corrections, too, if they depend on the incorrect form of the headers in
1582 previous versions which defined too many symbols and included too many
1585 * regex now handles multibyte character sets correctly.
1586 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1588 * iconv (the program) does now conform to the upcoming XPG6 and handles
1589 charmaps. Instead of the charset names the path of charmaps can be
1590 provided and the conversion happens based on this data.
1591 Contributed by Ulrich Drepper.
1593 * The locale program now provides detailed information about the installed
1598 only lists the names of the supported locales
1602 provides details such as country, language, and codeset name.
1603 Contributed by Ulrich Drepper.
1607 * The gencat program now parses the input file according to the charset
1608 selected by the LC_CTYPE category. This is important for stateful
1609 character sets. To make generating catalogs easier there is a way
1610 to overwrite the charset selected by the locale: before the first
1611 message or $ quote line the catalog can contain a line like
1613 $ codeset=ISO-8859-2
1615 to select the charset (ISO-8859-2 in this case).
1617 Implemented by Shinya Hanataka and Ulrich Drepper.
1619 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1620 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1621 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1623 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1624 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1626 * The LANGUAGE environment variable is now ignored unless the locale is
1627 changed from the default "C" locale.
1629 * The usual bug fixes.
1633 * Greg McGary added runtime support for bounds checking using gcc's
1634 new -fbounded-pointers option. ix86 target is complete. PowerPC
1637 * Thorsten Kukuk added secure mode support to nscd.
1639 * The Berkeley db libraries have been removed.
1641 Related, the nss_db module is now in a separate package since it
1642 obviously requires a database library being available.
1644 * Wide character I/O streams implemented by Ulrich Drepper.
1646 * Functions from the extended socket API added by Ulrich Drepper.
1648 * Functions feenableexcept and fedisableexcept to control the
1649 behaviour of individual exceptions have been added by Andreas Jaeger.
1651 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1653 * The resolver code has been updated from bind 8.2.3-T5B which supports
1654 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1657 This change could in some situations effect backward compatibility. Since
1658 now `_res' is a thread-local instead of a global variable, modifying it
1659 in one thread does not have any effect in other threads.
1661 The resolver library was also extended to allow IPv6 as the transport
1662 protocol for the requests. This work was done by Stig Venaas.
1664 * Compatibility code for K&R C compilers has been removed from the
1665 header files. A ISO C compiler is needed to use the library
1666 (conforming to either C89 or C99 standard).
1668 * Complete rewrite of the localedef program to support multibyte character
1669 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1670 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1671 Implemented by Ulrich Drepper.
1673 Bruno Haible significantly improved the generation and use of the data
1674 structures for the wide character tables.
1676 * Plural handling in gettext implemented by Ulrich Drepper.
1678 * The utmp daemon has been removed.
1680 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1682 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1685 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1687 * POSIX barriers implemented by Kaz Kylheku.
1689 * POSIX spawn function family implemented by Ulrich Drepper.
1691 * POSIX spinlocks are now available.
1693 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1695 * the configure option --enable-kernel=X.Y.Z allows to strip out
1696 compatibility for kernel versions before X.Y.Z. This is currently only
1697 implemented for Linux.
1699 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1700 field sin6_scope_id. This means that all programs using IPv6 should be
1701 recompiled. Don't expect binary compatibility with previous glibc
1704 * various conversion modules for IBM character sets contributed by
1707 * IA-64 port by Jes Sorensen and HJ Lu.
1721 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1723 * New xdr functions are added; some rpc functions are now 64bit clean.
1725 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1727 * Fixed known incompatibilities with glibc 2.0.
1729 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1731 * Optimized a number of functions (especially the ELF dynamic loader).
1733 * Update timezone data files.
1735 * lots of charmaps corrections
1737 * some new locale definitions and charmaps
1742 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1743 conform to POSIX member type requirements. Symbol versions have been
1744 adjusted as needed within the library, and for direct use by applications,
1745 but there is potential for problems if third-party libraries use
1746 struct timeval as part of their interface. This does not present
1747 a problem for X and other "essential" system libraries.
1749 * An additional locale model to support C++ Standard Library locale
1750 model and probably more was implemented by Ulrich Drepper.
1752 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1755 * Miles Bader provided the `argp' function family to support hierachical
1756 command line argument parsing, layered on top of getopt.
1758 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1760 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1763 * scanf recognizes the %a and %A format for scanning floating point numbers.
1765 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1766 information and interfaces for the available integer types.
1768 * about 130 new math functions were added to implement the ISO C9x math
1771 * the new header <complex.h> contains definitions of the complex math
1772 functions from ISO C 9X.
1774 * the new header <tgmath.h> defines generic macros to use complex or
1775 real valued functions.
1777 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1779 * Andreas Jaeger provided a test suite for the math library.
1781 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1783 * Ulrich Drepper added character set conversion functions (iconv).
1785 * Optimized string functions have been added.
1787 * The localedata addon is now part of glibc.
1789 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1791 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1792 daemon for NSS (nscd).
1794 Missing a better place here are some numbers on improvements. Under
1795 Linux 2.1.125 un-tar-ing the kernel sources takes
1799 using local files 12.19s 6.88s 22.91s
1801 using NIS 13.92s 8.91s 26.34s
1803 using NIS & nscd 10.37s 7.34s 25.30s
1805 using NIS+ 27.57s 30.37s 640.46s
1807 using NIS+ & nscd 10.25s 7.83s 26.51s
1809 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1811 Keep in mind that non-namelookup related operations dominate above times.
1812 It was just a common complain that using NIS+ unpacking the kernel is
1815 [1] The old nscd implementation is not available anymore since it was
1816 distributed with glibc up to version 2.0.98 and thus is now replaced.
1818 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1820 * Mark Kettenis provided a Hesiod NSS module.
1822 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1823 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1825 * rcmd can now handle netgroups (Dick Streefland).
1827 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1830 * Support for the IPv6 protocol has been added to the socket API, as per the
1831 latest draft standards.
1833 * Support for Linux 2.2 has been added.
1835 * Interface changes relative to the latest 2.0.x release:
1836 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1837 addseverity NEW: Unix98
1838 alphasort64 NEW: LFS
1839 argp_err_exit_status NEW: argp, GNU ext
1840 argp_error NEW: argp, GNU ext
1841 argp_failure NEW: argp, GNU ext
1842 argp_help NEW: argp, GNU ext
1843 argp_parse NEW: argp, GNU ext
1844 argp_program_bug_address NEW: argp, GNU ext
1845 argp_program_version NEW: argp, GNU ext
1846 argp_program_version_hook NEW: argp, GNU ext
1847 argp_state_help NEW: argp, GNU ext
1848 argp_usage NEW: argp, GNU ext
1849 authdes_create NEW: Secure RPC
1850 authdes_getucred NEW: Secure RPC
1851 authdes_pk_create NEW: Secure RPC
1852 backtrace NEW: GNU ext.
1853 backtrace_symbols NEW: GNU ext.
1854 backtrace_symbols_fd NEW: GNU ext.
1856 cacosf NEW: ISO C 9x
1857 cacosh NEW: ISO C 9x
1858 cacoshf NEW: ISO C 9x
1859 cacoshl NEW: ISO C 9x
1860 cacosl NEW: ISO C 9x
1867 casinf NEW: ISO C 9x
1868 casinh NEW: ISO C 9x
1869 casinhf NEW: ISO C 9x
1870 casinhl NEW: ISO C 9x
1871 casinl NEW: ISO C 9x
1873 catanf NEW: ISO C 9x
1874 catanh NEW: ISO C 9x
1875 catanhf NEW: ISO C 9x
1876 catanhl NEW: ISO C 9x
1877 catanl NEW: ISO C 9x
1878 cbc_crypt NEW: Secure RPC
1882 ccoshf NEW: ISO C 9x
1883 ccoshl NEW: ISO C 9x
1889 cimagf NEW: ISO C 9x
1890 cimagl NEW: ISO C 9x
1891 clearerr_locked REMOVED
1892 clntunix_create NEW: sunrpc ext
1894 clog10 NEW: ISO C 9x
1895 clog10f NEW: ISO C 9x
1896 clog10l NEW: ISO C 9x
1906 cprojf NEW: ISO C 9x
1907 cprojl NEW: ISO C 9x
1909 crealf NEW: ISO C 9x
1910 creall NEW: ISO C 9x
1915 csinhf NEW: ISO C 9x
1916 csinhl NEW: ISO C 9x
1919 csqrtf NEW: ISO C 9x
1920 csqrtl NEW: ISO C 9x
1924 ctanhf NEW: ISO C 9x
1925 ctanhl NEW: ISO C 9x
1927 des_setparity NEW: Secure RPC
1928 ecb_crypt NEW: Secure RPC
1929 endutxent NEW: Unix98
1931 exp10f NEW: ISO C 9x
1932 exp10l NEW: ISO C 9x
1936 fattach NEW: STREAMS
1937 fdetach NEW: STREAMS
1941 feclearexcept NEW: ISO C 9x
1942 fegetenv NEW: ISO C 9x
1943 fegetexceptflag NEW: ISO C 9x
1944 fegetround NEW: ISO C 9x
1945 feholdexcept NEW: ISO C 9x
1947 feraiseexcept NEW: ISO C 9x
1948 ferror_locked REMOVED
1949 fesetenv NEW: ISO C 9x
1950 fesetexceptflag NEW: ISO C 9x
1951 fesetround NEW: ISO C 9x
1952 fetestexcept NEW: ISO C 9x
1953 feupdateenv NEW: ISO C 9x
1954 fflush_locked REMOVED
1958 fgets_unlocked NEW: GNU ext.
1959 fileno_locked REMOVED
1971 fputc_locked REMOVED
1972 fputs_unlocked NEW: GNU ext.
1973 fread_unlocked NEW: GNU ext.
1978 fstatvfs NEW: Unix98
1982 ftruncate64 NEW: LFS
1984 fwrite_unlocked NEW: GNU ext.
1985 gai_strerror NEW: IPv6
1989 getchar_locked REMOVED
1991 getdate_err NEW: Unix98
1992 getdate_r NEW: GNU ext.
1994 getnameinfo NEW: IPv6
1995 getnetname NEW: Secure RPC
1996 getpmsg NEW: STREAMS
1997 getpt NEW: Unix98 PTY
1998 getrlimit64 NEW: LFS
1999 getutxent NEW: Unix98
2000 getutxid NEW: Unix98
2001 getutxline NEW: Unix98
2002 glob64 NEW: GNU ext.
2003 globfree64 NEW: GNU ext.
2004 gnu_get_libc_release NEW: GNU ext.
2005 gnu_get_libc_version NEW: GNU ext.
2006 grantpt NEW: Unix98 PTY
2007 host2netname NEW: Secure RPC
2009 iconv_close NEW: iconv
2010 iconv_open NEW: iconv
2011 if_freenameindex NEW: IPv6
2012 if_indextoname NEW: IPv6
2013 if_nameindex NEW: IPv6
2014 if_nametoindex NEW: IPv6
2015 in6addr_any NEW: IPv6
2016 in6addr_loopback NEW: IPv6
2017 inet6_isipv4mapped NEW: IPv6
2018 isastream NEW: STREAMS
2019 iswblank NEW: GNU ext.
2020 key_decryptsession NEW: Secure RPC
2021 key_decryptsession_pk NEW: Secure RPC
2022 key_encryptsession NEW: Secure RPC
2023 key_encryptsession_pk NEW: Secure RPC
2024 key_gendes NEW: Secure RPC
2025 key_get_conv NEW: Secure RPC
2026 key_secretkey_is_set NEW: Secure RPC
2027 key_setnet NEW: Secure RPC
2028 key_setsecret NEW: Secure RPC
2029 llrint NEW: ISO C 9x
2030 llrintf NEW: ISO C 9x
2031 llrintl NEW: ISO C 9x
2032 llround NEW: ISO C 9x
2033 llroundf NEW: ISO C 9x
2034 llroundl NEW: ISO C 9x
2039 lrintf NEW: ISO C 9x
2040 lrintl NEW: ISO C 9x
2041 lround NEW: ISO C 9x
2042 lroundf NEW: ISO C 9x
2043 lroundl NEW: ISO C 9x
2045 makecontext NEW: Unix98
2046 mempcpy NEW: GNU ext.
2049 modify_ldt NEW: kernel
2053 nearbyint NEW: ISO C 9x
2054 nearbyintf NEW: ISO C 9x
2055 nearbyintl NEW: ISO C 9x
2056 netname2host NEW: Secure RPC
2057 netname2user NEW: Secure RPC
2058 nexttoward NEW: ISO C 9x
2059 nexttowardf NEW: ISO C 9x
2060 nexttowardl NEW: ISO C 9x
2064 passwd2des NEW: Secure RPC
2066 pow10f NEW: GNU ext.
2067 pow10l NEW: GNU ext.
2070 printf_size NEW: GNU ext.
2071 printf_size_info NEW: GNU ext.
2072 profil_counter REMOVED
2073 pthread_mutexattr_getkind_np REPLACED
2074 pthread_mutexattr_setkind_np REPLACED
2075 ptsname NEW: Unix98 PTY
2076 ptsname_r NEW: Unix98 PTY
2078 putchar_locked REMOVED
2079 putgrent NEW: GNU ext.
2081 putpmsg NEW: STREAMS
2082 pututxline NEW: Unix98
2086 readdir64_r NEW: LFS
2087 remquo NEW: ISO C 9x
2088 remquof NEW: ISO C 9x
2089 remquol NEW: ISO C 9x
2091 roundf NEW: ISO C 9x
2092 roundl NEW: ISO C 9x
2094 scalbln NEW: ISO C 9x
2095 scalblnf NEW: ISO C 9x
2096 scalblnl NEW: ISO C 9x
2098 sendfile NEW: kernel
2099 setcontext NEW: Unix98
2100 setrlimit64 NEW: LFS
2101 setutxent NEW: Unix98
2103 sigignore NEW: Unix98
2104 sigqueue NEW: POSIX.1b
2105 sigrelse NEW: Unix98
2106 sigset NEW: POSIX.1b
2107 sigtimedwait NEW: POSIX.1b
2108 sigwaitinfo NEW: POSIX.1b
2109 sincos NEW: GNU ext.
2110 sincosf NEW: GNU ext.
2111 sincosl NEW: GNU ext.
2115 strcasestr NEW: GNU ext.
2116 strtoimax NEW: ISO C 9x
2117 strtoumax NEW: ISO C 9x
2118 strverscmp NEW: GNU ext.
2119 svcauthdes_stats NEW: Secure RPC
2120 svcunix_create NEW: sunrpc etx
2121 svcunixfd_create NEW: sunrpc ext
2122 swapcontext NEW: Unix98
2123 tcgetsid NEW: Unix98 PTY
2124 tdestroy NEW: GNU ext.
2125 tgamma NEW: ISO C 9x
2126 tgammaf NEW: ISO C 9x
2127 tgammal NEW: ISO C 9x
2131 truncf NEW: ISO C 9x
2132 truncl NEW: ISO C 9x
2134 unlockpt NEW: Unix98 PTY
2135 updwtmpx NEW: Unix98
2136 user2netname NEW: Secure RPC
2137 utmpxname NEW: Unix98
2138 versionsort NEW: GNU ext.
2139 versionsort64 NEW: GNU ext.
2141 wcscasecmp NEW: GNU ext.
2142 wcsncasecmp NEW: GNU ext.
2143 wcsnlen NEW: GNU ext.
2144 wcstoimax NEW: ISO C 9x
2145 wcstoll NEW: ISO C 9x
2146 wcstoull NEW: ISO C 9x
2147 wcstoumax NEW: ISO C 9x
2149 wordexp NEW: POSIX.2
2150 wordfree NEW: POSIX.2
2151 write_profiling REMOVED
2152 xdecrypt NEW: Secure RPC
2153 xdr_authdes_cred NEW: Secure RPC
2154 xdr_authdes_verf NEW: Secure RPC
2155 xdr_cryptkeyarg NEW: Secure RPC
2156 xdr_cryptkeyarg2 NEW: Secure RPC
2157 xdr_cryptkeyres NEW: Secure RPC
2158 xdr_getcredres NEW: Secure RPC
2159 xdr_key_netstarg NEW: Secure RPC
2160 xdr_key_netstres NEW: Secure RPC
2161 xdr_keybuf NEW: Secure RPC
2162 xdr_keystatus NEW: Secure RPC
2163 xdr_netnamestr NEW: Secure RPC
2164 xdr_sizeof NEW: Secure RPC
2165 xdr_unixcred NEW: sunrpc ext
2166 xencrypt NEW: Secure RPC
2167 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2178 * inet_ntoa is thread-safe
2180 * updwtmp is moved from libutil to libc
2182 * rewrite of cbrt function
2184 * update of timezone data
2198 * add atoll function
2200 * fix complex problems in Berkeley DB code
2202 * fix math functions
2206 * fixed lots of header problems (especially Linux/GNU specific)
2208 * dynamic loader preserves all registers
2210 * Roland McGrath provided support for handling of auxiliary objects in
2211 the ELF dynamic loader.
2213 * support for parallel builds is improved
2217 * GNU extensions are no longer declared by default. To enable them you
2218 must define the macro `_GNU_SOURCE' in your program or compile with
2221 * The library has changed from using GNU ld symbol aliases to using weak
2222 symbols where available. The ELF object file format supports weak
2223 symbols; GNU ld also supports weak symbols in the a.out format. (There
2224 is also now support for other GNU ld extensions in ELF. Use the
2225 `--with-elf' option to configure to indicate you have ELF, and
2226 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2227 of many files which contained only symbol aliases, reducing the size of
2228 the source and the compiled library; many other files were renamed to
2229 less cryptic names previously occupied by the symbol alias files.
2230 There is a new header file <elf.h> for programs which operate on
2231 files in the ELF format.
2233 * Converted to Autoconf version 2, so `configure' has more options.
2234 Run `configure --help' to see the details.
2236 * The library can now be configured to build profiling, highly-optimized
2237 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2238 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2239 `configure' enable building these extra libraries. The shared library is
2240 built by default when using both ELF and GNU ld. When shared libraries
2241 are enabled, the new library `-ldl' is available for arbitrary run-time
2242 loading of shared objects; its interface is defined in <dlfcn.h>. The
2243 new header file <link.h> gives access to the internals of the run-time
2244 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2245 application of same name on other systems and it provides information
2246 about dynamically linked binaries.
2248 * The C library now provides the run-time support code for profiling
2249 executables compiled with `-pg'. Programs can control the profiling code
2250 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2251 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2252 the support for this file format was contributed by David Mosberger-Tang.
2254 * The math code has been replaced with a math library based on fdlibm from
2255 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2256 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2257 functions. The math functions now reside in a separate library, so
2258 programs using them will need to use `-lm' their linking commands.
2260 * John C. Bowman contributed optimized ix87 assembler inline functions.
2262 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2263 mechanism similar to that found in Solaris 2. This is now used for the
2264 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2265 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2266 file controls what services are used for each individual database. This
2267 works by loading shared libraries with names specified in `nsswitch.conf',
2268 so service modules can be changed or added at any time without even
2269 relinking any program. Currently there are the file, db, and NIS based
2270 NSS services available.
2272 * The new functions `strtoq' and `strtouq' parse integer values from
2273 strings, like `strtol' and `strtoul', but they return `long long int' and
2274 `unsigned long long int' values, respectively (64-bit quantities).
2276 * The new functions `strtof' and `strtold' parse floating-point values from
2277 strings, like `strtod', but they return `float' and `long double' values,
2278 respectively (on some machines `double' and `long double' are the same).
2280 * Ulrich Drepper has contributed new implementations of the floating-point
2281 printing and reading code used in the `printf' family of functions and
2282 `strtod', `strtof', and `strtold'. These new functions are perfectly
2283 accurate, and much faster than the old ones.
2285 * The implementation of the POSIX locale model was completely rewritten by
2286 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2287 to compile the POSIX locale definition.
2289 * The former dummy implementations of the strcoll and strxfrm function are
2290 now replaced by fully functional code contributed by Ulrich Drepper. The
2291 collation information comes from the POSIX locale definitions.
2293 * The new header <langinfo.h> defines an interface for accessing
2294 various locale-dependent data (using the locale chosen with `setlocale').
2296 * Ulrich Drepper has contributed a new suite of functions for operation on
2297 wide-character and multibyte-character strings, in <wchar.h>;
2298 and classification and case conversion of wide characters, in <wctype.h>.
2299 These new functions are conforming to the ISO C, Amendement 1 specification.
2301 * There is now a second implementation of the standard I/O library available.
2302 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2303 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2305 * You can now use positional parameter specifications in format strings
2306 for the `printf' and `scanf' families of functions. For example,
2307 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2308 ``Number 6, Mr Jones''. This is mainly useful when providing different
2309 format strings for different languages, whose grammars may dictate
2310 different orderings of the values being printed. To support this
2311 feature, the interface for `register_printf_handler' has changed; see
2312 the header file <printf.h> for details.
2314 * The `printf' and `scanf' families of functions now understand a new
2315 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2316 to group numbers as indicated by the locale; for `scanf' and friends, this
2317 says to accept as valid only a number with all the proper grouping
2318 separators in the right places. In the default "C" locale, numbers are
2319 not grouped; but locales for specific countries will define the usual
2320 conventions (i.e. separate thousands with `,' in the US locale).
2322 * The pgrp functions have been regularized, slightly incompatibly but much
2323 less confusingly. The core functions are now `getpgid' and `setpgid',
2324 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2325 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2326 provided for compatibility. There is no longer an incompatible `getpgrp'
2327 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2329 * The new header file <fts.h> and suite of functions simplify programs that
2330 operate on directory trees. This code comes from 4.4 BSD.
2332 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2333 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2334 NSS scheme used in glibc.
2336 * There is a new malloc debugging hook `__memalign_hook'.
2338 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2339 `unsigned int' in <sys/types.h>. These are for compatibility only and
2340 their use is discouraged.
2342 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2343 done differently, so that it works even without GNU ld.
2345 * New function `euidaccess' checks allowed access to a file like `access',
2346 but using the effective IDs instead of the real IDs.
2348 * The time zone data files have been updated for the latest and greatest
2349 local time conventions of the countries of the world.
2351 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2354 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2355 for formatting floating-point numbers. They are provided only for
2356 compatibility; new programs should use `sprintf' instead. There are
2357 also equivalent function for the `long double' floating-point type and
2358 all functions also exist in a reentrant form.
2360 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2361 functions for maintaining the login-record files (primarily of use to
2362 system programs such as `login'), and convenient functions for
2363 allocating and initializing a pseudo-terminal (pty) device.
2365 * Ulrich Drepper has contributed new support for System V style
2366 shared memory and IPC on systems that support it.
2368 * Ulrich Drepper has contributed several miscellaneous new functions found
2369 in System V: The `hsearch' family of functions provide an effective
2370 implementation of hash tables; `a64l' and `l64a' provide a very simple
2371 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2374 * Ulrich Drepper has contributed new reentrant counterparts for the
2375 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2377 * Ulrich Drepper has contributed new, highly-optimized versions of several
2378 string functions for the i486/Pentium family of processors.
2380 * Ulrich Drepper has updated the Linux-specific code, based largely
2381 on work done in Hongjiu Lu's version of GNU libc for Linux.
2382 The GNU library now supports Linux versions 2.0.10 and later,
2383 using the ELF object file format (i[3456]86-*-linux).
2385 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2387 * David Mosberger-Tang and Richard Henderson have ported the C library
2388 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2389 dynamic linking support for ELF/Alpha.
2391 * Richard Henderson contributed several Alpha optimized assembler function
2392 for arithmetic and string handling.
2394 * Ulrich Drepper has contributed a new set of message catalog functions to
2395 support multiple languages using the <libintl.h> interface, for use with
2396 his new package GNU gettext. Translation volunteers have contributed
2397 catalogs of the library's messages in Spanish, German, and Korean.
2399 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2400 program and the `catgets' function for reading the catalog files it
2401 creates. (The <libintl.h> interface is preferred; we include the
2402 <nl_types.h> interface using `catgets' only for source compatibility with
2403 programs already written to use it.)
2405 * New header file <values.h> gives SVID-compatible names for <limits.h>
2408 * Various new macros, declarations, and small header files for compatibility
2411 * New function `group_member' is a convenient way to check if a process has
2412 a given effective group ID.
2414 * When using GCC 2.7 and later, the socket functions are now declared in a
2415 special way so that passing an argument of type `struct sockaddr_in *',
2416 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2417 `struct sockaddr *' type, does not generate a type-clash warning.
2419 * New function `error' declared in header file <error.h> is a convenient
2420 function for printing error messages and optionally exiting; this is the
2421 canonical function used in GNU programs. The new functions `err', `warn',
2422 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2423 doing the same thing.
2425 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2426 POSIX.2 `glob' function to do ~ and {...} expansion.
2428 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2429 `clearenv' which is used in POSIX.9 is also available.
2431 * New function `getsid' returns session ID number on systems that support it.
2433 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2434 files <db.h> and <mpool.h> provide a rich set of functions for several
2435 types of simple databases stored in memory and in files, and <ndbm.h> is
2436 an old `ndbm'-compatible interface using the `db' functions. Link with
2437 `-ldb' to get these functions.
2439 * New macro `strdupa' copies a string like `strdup', but uses local stack
2440 space from `alloca' instead of dynamic heap space from `malloc'.
2442 * New function `strnlen' is like `strlen' but searches only a given maximum
2443 number of characters for the null terminator. `stpncpy', `strndup' and
2444 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2447 * New function `statfs' in header <sys/statfs.h>.
2449 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2450 provide convenient functions for operating on blocks of null-terminated
2453 * A new suite of functions in <utmp.h> handle all the details of reading
2454 and writing the utmp file.
2456 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2459 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2460 completely POSIX compliant and also implemented the extended functionality
2461 to handle alternate digit representation and alternate era date formats.
2463 * Ulrich Drepper provided an implementation of the `strptime' function
2464 defined in XPG4.2 which transforms a string into a `struct tm' value.
2466 * Paul Eggert provided the tzselect shell script as part of the timezone
2467 code. The shell script makes it easy to select the correct timezone
2470 * The implementation of the malloc family of functions is completely replaced
2471 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2472 The implementation uses the mmap function (if available) and it is
2473 optimized for the use in multi threaded programs.
2475 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2476 functions. This new functionality is usable by specifying a special
2477 salt string and it is compatible with implementation on *BSD systems.
2479 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2480 `getsubopt' to handle second level command line options, `bsd_signal'
2481 to access BSD style `signal' functionality, the obsolete `regexp' style
2484 * the `lchown' function is available on system which support this
2487 * The implementation of the shadow password handling function was contributed
2490 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2492 * POSIX.1g support was added. The <sys/select.h> header is available,
2493 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2494 implementation of `getaddrinfo'.
2498 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2500 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2501 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2503 * The new function `daemon' from 4.4 BSD is useful for server programs that
2504 want to put themselves in the background.
2506 * Joel Sherrill has contributed support for several standalone boards that
2507 run without an operating system.
2509 * `printf', `scanf' and friends now accept a `q' type modifier for long
2510 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2512 * All of the code taken from BSD (notably most of the math and networking
2513 routines) has been updated from the BSD 4.4-Lite release.
2515 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2517 * The new functions `getdomainname' and `setdomainname' fetch or change the
2518 YP/NIS domain name. These are system calls which exist on systems which
2521 * The time zone data files have been updated for the latest international
2524 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2525 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2529 * The C library now includes support for Sun RPC, from Sun's free
2530 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2531 are included. (There is still no support for YP.)
2533 * Tom Quinn has contributed a port of the C library to SGI machines running
2534 Irix 4 (mips-sgi-irix4).
2536 * The new `lockf' function is a simplified interface to the locking
2537 facilities of `fcntl', included for compatibility.
2539 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2541 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2543 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2546 * The error message printed by `assert' for a failed assertion now includes
2547 the name of the program (if using GNU ld) and the name of the calling
2548 function (with versions of GCC that support this).
2550 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2552 * The library now includes the <sys/mman.h> header file and memory
2553 management functions `mmap', `munmap', `mprotect', `msync', and
2554 `madvise', on systems that support those facilities.
2556 * The interface for `mcheck' has changed slightly: the function called to
2557 abort the program when an allocation inconsistency is detected now takes
2558 an argument that indicates the type of failure. The new function
2559 `mprobe' lets you request a consistency check for a particular block at
2560 any time (checks are normally done only when you call `free' or `realloc'
2563 * It is now possible to easily cross-compile the C library, building on one
2564 system a library to run on another machine and/or operating system. All
2565 you need to do is set the variable `HOST_CC' in `configparms' to the
2566 native compiler for programs to run on the machine you are building on (a
2567 few generator programs are used on Unix systems); set `CC' to the
2570 * The new function `fexecve' (only implemented on the GNU system) executes
2571 a program file given a file descriptor already open on the file.
2575 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2576 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2578 * You can set the variable `libprefix' in `configparms' to specify a prefix
2579 to be prepended to installed library files; this makes it easy to install
2580 the GNU C library to be linked as `-lgnuc' or whatever.
2582 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2583 copies a limited number of characters from a string, and returns the
2584 address of the last character written.
2586 * You no longer need to check for whether the installed `stddef.h' is
2587 compatible with the GNU C library. configure now checks for you.
2589 * You can now define a per-stream `fileno' function to convert the
2590 stream's cookie into an integral file descriptor.
2592 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2593 allocates zero bytes of storage, and returns a unique pointer which
2594 you can pass to `realloc' or `free'. The behavior is undefined if
2595 you dereference this pointer.
2597 * The C library now runs on Sony NEWS m68k machines running either
2598 NewsOS 3 or NewsOS 4.
2600 * The new `syscall' function is a system-dependent primitive function
2601 for invoking system calls. It has the canonical behavior on Unix
2602 systems, including unreliable return values for some calls (such as
2603 `pipe', `fork' and `getppid').
2605 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2606 to `EAGAIN', which is the preferred name. On systems whose kernels
2607 use two distinct codes, the C library now translates EWOULDBLOCK to
2608 EAGAIN in every system call function.
2612 * The GNU C Library Reference Manual is now distributed with the library.
2613 `make dvi' will produce a DVI file of the printed manual.
2614 `make info' will produce Info files that you can read on line using C-h i
2615 in Emacs or the `info' program.
2616 Please send comments on the manual to bug-glibc-manual@gnu.org.
2618 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2620 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2622 * Jason Merrill has contributed a port to the Sequent Symmetry running
2623 Dynix version 3 (i386-sequent-dynix).
2625 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2626 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2628 * New function `memory_warnings' lets you arrange to get warnings when
2629 malloc is running out of memory to allocate, like Emacs gives you.
2631 * The C library now contains the relocating allocator used in Emacs 19 for
2632 its editing buffers. This allocator (ralloc) minimizes allocation
2633 overhead and fragmentation by moving allocated regions around whenever it
2634 needs to. You always refer to a ralloc'd region with a "handle" (a
2635 pointer to a pointer--an object of type `void **').
2637 * There is a new `printf' format: `%m' gives you the string corresponding
2638 to the error code in `errno'.
2640 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2641 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2642 pass, the `a' modifier says to fill in a `char **' you pass with a
2645 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2646 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2647 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2649 * `mkstemp' is a traditional Unix function to atomically create and open a
2650 uniquely-named temporary file.
2654 * The standard location for the file that says what the local timezone is
2655 has changed again. It is now `/usr/local/etc/localtime' (or more
2656 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2658 * The distribution no longer contains any files with names longer than 14
2661 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2662 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2664 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2668 * The configuration process has changed quite a bit. The `configure'
2669 script is now used just like the configuration scripts for other GNU
2670 packages. The `sysdeps' directory hierarchy is much rearranged.
2671 The file `INSTALL' explains the new scheme in detail.
2673 * The header files no longer need to be processed into ANSI C and
2674 traditional C versions. There is just one set of files to install, and
2675 it will work with ANSI or old C compilers (including `gcc -traditional').
2677 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2678 MIPS DECStation running Ultrix 4.
2680 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2681 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2682 made itself into a shared library.
2684 * Yet further improved support for the i386, running 4.3 BSD-like systems
2685 (such as Mach 3 with the Unix single-server), or System V.
2687 * New function `strncasecmp' to do case-insensitive string comparison
2688 with limited length.
2690 * New function `strsep' is a reentrant alternative to `strtok'.
2692 * New functions `scandir' and `alphasort' for searching directories.
2694 * New function `setenv' is a better interface to `putenv'.
2696 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2697 function for traversing a directory tree.
2699 * The GNU obstack package is now also part of the C library.
2700 The new function `open_obstack_stream' creates a stdio stream that
2701 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2702 formatted output directly to an obstack.
2704 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2705 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2707 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2709 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2710 things to your strings.
2712 * There are some new test programs: test-fseek, testmb, and testrand.
2714 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2715 These ports are not finished, but are a good starting place for really
2716 supporting those systems.
2718 * `/etc/localtime' is now the standard location for the file that says what
2719 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2720 This follows the general principle that `/etc' is the place for all local
2721 configuration files.
2723 * The C library header files now use `extern "C"' when used by the C++
2724 compiler, so the C library should now work with C++ code.
2726 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2727 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2730 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2731 function which uses the `merge sort' algorithm, and is said to be
2732 significantly faster than the old GNU `qsort' function. Merge sort is
2733 now the standard `qsort' function. The new algorithm can require a lot
2734 of temporary storage; so, the old sorting function is called when the
2735 required storage is not available.
2737 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2738 provides the Unix `crypt' function, plus some other entry points.
2740 * The code and header files taken from 4.4 BSD have been updated with the
2741 latest files released from Berkeley.
2743 ----------------------------------------------------------------------
2744 Copyright information:
2746 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2748 Permission is granted to anyone to make or distribute verbatim copies
2749 of this document as received, in any medium, provided that the
2750 copyright notice and this permission notice are preserved,
2751 thus giving the recipient permission to redistribute in turn.
2753 Permission is granted to distribute modified versions
2754 of this document, or of portions of it,
2755 under the above conditions, provided also that they
2756 carry prominent notices stating who last changed them.
2759 version-control: never