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 fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
11 the following new symbols are used: fts64_children, fts64_close,
12 fts64_open, fts64_read and fts64_set.
14 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
15 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
16 unnecessary serialization of memory allocation requests across threads.
17 The defect is now corrected. Users should see a substantial increase in
18 the concurent throughput of allocation requests for applications which
19 trigger this bug. Affected applications typically create create and
20 destroy threads frequently. (Bug 19048 was reported and analyzed by
23 * There is now a --disable-timezone-tools configure option for disabling the
24 building and installing of the timezone related utilities (zic, zdump, and
25 tzselect). This is useful for people who build the timezone data and code
26 independent of the GNU C Library.
28 * The LD_POINTER_GUARD environment variable can no longer be used to
29 disable the pointer guard feature. It is always enabled.
31 * The obsolete header <regexp.h> has been removed. Programs that require
32 this header must be updated to use <regex.h> instead.
34 * Optimized string, wcsmbs and memory functions for IBM z13.
35 Implemented by Stefan Liebler.
37 * The minimum GCC version that can be used to build this version of the GNU
38 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
39 still be used to compile programs using the GNU C Library.
41 * The following bugs are resolved with this release:
43 [The release manager will add the list generated by
44 scripts/list-fixed-bugs.py just before the release.]
48 * The following bugs are resolved with this release:
50 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
51 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
52 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
53 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
54 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
55 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
56 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
57 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
58 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
59 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
60 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
61 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
62 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
63 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
64 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
65 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
66 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
67 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
68 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
69 18657, 18676, 18694, 18696, 18887.
71 * Cache information can be queried via sysconf() function on s390 e.g. with
72 _SC_LEVEL1_ICACHE_SIZE as argument.
74 * A buffer overflow in gethostbyname_r and related functions performing DNS
75 requests has been fixed. If the NSS functions were called with a
76 misaligned buffer, the buffer length change due to pointer alignment was
77 not taken into account. This could result in application crashes or,
78 potentially arbitrary code execution, using crafted, but syntactically
79 valid DNS responses. (CVE-2015-1781)
81 * The time zone file parser has been made more robust against crafted time
82 zone files, avoiding heap buffer overflows related to the processing of
83 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
84 large time zone data files. Overly long time zone specifiers in the TZ
85 variable no longer result in stack overflows and crashes.
87 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
88 for LD and GD on x86 and x86-64, has been implemented. You will need
89 binutils-2.24 or later to enable this optimization.
91 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
92 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
93 Hat). These updates cause user visible changes, such as the fix for bug
96 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
97 and getXXbyYY NSS calls for the same database, causing a denial-of-service
98 condition in some applications.
100 * Added vector math library named libmvec with the following vectorized x86_64
101 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
103 The library can be disabled with --disable-mathvec. Use of the functions is
104 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
105 Shared library libmvec.so is linked in as needed when using -lm (no need to
106 specify -lmvec explicitly for not static builds).
107 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
109 * A new fmemopen implementation has been added with the goal of POSIX
110 compliance. The new implementation fixes the following long-standing
111 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
112 old implementation is still present for use be by existing binaries.
114 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
115 releases. It has been fixed to match 2.19 and older, but binaries built
116 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
118 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
119 Contributed by Roland McGrath (Google).
121 * The header <regexp.h> is deprecated, and will be removed in a future
122 release. Use of this header will trigger a deprecation warning.
123 Application developers should update their code to use <regex.h> instead.
125 This header was formerly part of SUS, but was deprecated in 1994 and
126 removed from the standard in 2001. Also, the glibc implementation
127 leaks memory. See BZ#18681 for more details.
131 * The following bugs are resolved with this release:
133 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
134 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
135 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
136 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
137 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
138 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
139 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
140 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
141 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
142 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
145 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
146 too little memory for the to-be-scanned arguments and overflow the
147 allocated buffer. The implementation now correctly computes the required
148 buffer size when using malloc, and switches to malloc from alloca as
151 * A new semaphore algorithm has been implemented in generic C code for all
152 machines. Previous custom assembly implementations of semaphore were
153 difficult to reason about or ensure that they were safe. The new version
154 of semaphore supports machines with 64-bit or 32-bit atomic operations.
155 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
156 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
158 * Port to Altera Nios II has been contributed by Mentor Graphics.
160 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
161 implementations for powerpc64/powerpc64le.
162 Implemented by Adhemerval Zanella (IBM).
164 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
165 and powerpc64le. This may improve lock scaling of existing programs on
166 HTM capable systems. The lock elision code is only enabled with
167 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
168 powerpc will issue a transaction abort on every syscall to avoid side
169 effects being visible outside transactions.
171 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
172 AArch64. Contributed by ARM Ltd.
174 * i386 memcpy functions optimized with SSE2 unaligned load/store.
176 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
177 under certain input conditions resulting in the execution of a shell for
178 command substitution when the application did not request it. The
179 implementation now checks WRDE_NOCMD immediately before executing the
180 shell and returns the error WRDE_CMDSUB as expected.
182 * CVE-2012-3406 printf-style functions could run into a stack overflow when
183 processing format strings with a large number of format specifiers.
185 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
186 infinite loop if the DNS response contained a PTR record of an unexpected
189 * The minimum GCC version that can be used to build this version of the GNU
190 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
191 still be used to compile programs using the GNU C Library.
193 * The GNU C Library is now built with -Werror by default. This can be
194 disabled by configuring with --disable-werror.
196 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
198 * The obsolete sigvec function has been removed. This was the original
199 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
200 programs have been using instead for about 25 years. Of course, ABI
201 compatibility for old binaries using sigvec remains intact.
203 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
204 with newer versions of bison.
206 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
207 The original MIPS o32 hard-float ABI requires an FPU where double-precision
208 registers overlay two consecutive single-precision registers. MIPS32R2
209 introduced a new FPU mode (FR=1) where double-precision registers extend the
210 corresponding single-precision registers which is incompatible with the
211 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
212 require the use of FR=1 making a transition necessary. New o32 ABI
213 extensions enable users to migrate over time from the original o32 ABI
214 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
215 tracks the ABI of any loaded object and verifies that new objects are
216 compatible. Mode transitions will also be requested as required and
217 unsupportable objects will be rejected. The ABI checks include both soft and
218 hard float ABIs for o32, n32 and n64.
220 GCC 5 with GNU binutils 2.25 onwards:
221 It is strongly recommended that all o32 system libraries are built using the
222 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
223 with the original and all new o32 ABI extensions. Configure a MIPS GCC
224 compiler using --with-fp-32=xx to set this by default.
228 * The following bugs are resolved with this release:
230 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
231 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
232 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
233 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
234 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
235 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
236 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
237 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
238 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
239 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
240 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
241 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
242 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
243 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
244 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
246 * Reverted change of ABI data structures for s390 and s390x:
247 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
248 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
249 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
250 are preserved pointing straight to the same implementation as the old ones.
251 Given that, new callers will simply provide a too-big buffer to these
252 functions. Any applications/libraries out there that embed jmp_buf or
253 ucontext_t in an ABI-relevant data structure that have already been rebuilt
254 against 2.19 headers will have to rebuilt again. This is necessary in any
255 case to revert the breakage in their ABI caused by the glibc change.
257 * Support for file description locks is added to systems running the
258 Linux kernel. The standard file locking interfaces are extended to
259 operate on file descriptions, not file descriptors, via the use of
260 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
261 are associated with an open file instead of a process.
263 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
265 * The minimum Linux kernel version that this version of the GNU C Library
266 can be used with is 2.6.32.
268 * Running the testsuite no longer terminates as soon as a test fails.
269 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
270 with PASS or FAIL lines for individual tests. A summary of the results is
271 printed, including a list of failing lists, and "make check" exits with
272 error status if there were any unexpected failures. "make check
273 stop-on-test-failure=y" may be used to keep the old behavior.
275 * The am33 port, which had not worked for several years, has been removed
278 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
279 supported; they now act the same as _DEFAULT_SOURCE (but generate a
280 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
281 conflicted with POSIX (support for which was removed in 2.19), the
282 interfaces those macros enabled remain available when compiling with
283 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
286 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
288 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
289 This may improve lock scaling of existing programs on TX capable systems.
290 The lock elision code is only built with --enable-lock-elision=yes and
291 then requires a GCC version supporting the TX builtins. With lock elision
292 default mutexes are elided via __builtin_tbegin, if the cpu supports
293 transactions. By default lock elision is not enabled and the elision code
296 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
297 copy the path argument. This allowed programs to cause posix_spawn to
298 deference a dangling pointer, or use an unexpected pathname argument if
299 the string was modified after the posix_spawn_file_actions_addopen
302 * All supported architectures now use the main glibc sysdeps directory
303 instead of some being in a separate "ports" directory (which was
304 distributed separately before glibc 2.17).
306 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
307 On configurations that support it (all Linux configurations), it's now
308 used regardless of the --enable-add-ons switch to configure. It is no
309 longer possible to build such configurations without pthreads support.
311 * Locale names, including those obtained from environment variables (LANG
312 and the LC_* variables), are more tightly checked for proper syntax.
313 setlocale will now fail (with EINVAL) for locale names that are overly
314 long, contain slashes without starting with a slash, or contain ".." path
315 components. (CVE-2014-0475) Previously, some valid locale names were
316 silently replaced with the "C" locale when running in AT_SECURE mode
317 (e.g., in a SUID program). This is no longer necessary because of the
320 * On x86-64, the dynamic linker's lazy-binding support is now compatible
321 with application code using Intel MPX instructions. (With all previous
322 versions, the MPX register state could be clobbered when making calls
323 into or out of a shared library.) Note that while the new dynamic
324 linker is compatible with all known x86 hardware whether or not it
325 supports Intel MPX, some x86 instruction-set emulators might fail to
326 handle the new instruction encodings. This is known to affect Valgrind
327 versions up through 3.9 (but will be fixed in the forthcoming 3.10
328 release), and might affect other tools that do instruction emulation.
330 * Support for loadable gconv transliteration modules has been removed.
331 The support for transliteration modules has been non-functional for
332 over a decade, and the removal is prompted by security defects. The
333 normal gconv conversion modules are still supported. Transliteration
334 with //TRANSLIT is still possible, and the //IGNORE specifier
335 continues to be supported. (CVE-2014-5119)
337 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
338 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
339 resulting a denial-of-service security vulnerability in applications which
340 use functions related to iconv. (CVE-2014-6040)
344 * The following bugs are resolved with this release:
346 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
347 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
348 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
349 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
350 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
351 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
352 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
353 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
354 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
355 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
356 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
357 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
358 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
359 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
360 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
361 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
362 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
363 16431, 16453, 16474, 16506, 16510, 16529
365 * Slovenian translations for glibc messages have been contributed by the
366 Translation Project's Slovenian team of translators.
368 * The public headers no longer use __unused nor __block. This change is to
369 support compiling programs that are derived from BSD sources and use
370 __unused internally, and to support compiling with Clang's -fblock
371 extension which uses __block.
373 * CVE-2012-4412 The strcoll implementation caches indices and rules for
374 large collation sequences to optimize multiple passes. This cache
375 computation may overflow for large collation sequences and may cause a
376 stack or buffer overflow. This is now fixed to use a slower algorithm
377 which does not use a cache if there is an integer overflow.
379 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
380 rules for large collation sequences to optimize multiple passes and falls
381 back to alloca if malloc fails, resulting in a possible stack overflow.
382 The implementation now falls back to an uncached collation sequence lookup
385 * CVE-2013-4788 The pointer guard used for pointer mangling was not
386 initialized for static applications resulting in the security feature
387 being disabled. The pointer guard is now correctly initialized to a
388 random value for static applications. Existing static applications need
389 to be recompiled to take advantage of the fix (bug 15754).
391 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
392 to the d_name member of struct dirent, or omit the terminating NUL
393 character. (Bugzilla #14699).
395 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
396 aligned_alloc functions could allocate too few bytes or corrupt the
397 heap when passed very large allocation size values (Bugzilla #15855,
400 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
401 for AF_INET6 has been fixed (Bugzilla #16072).
403 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
404 pap_CW, quz_PE, the_NP.
406 * Substantially revised locales: gd_GB, ht_HT
408 * The LC_ADDRESS field was updated to support country_car for almost all
411 * ISO 1427 definitions were updated.
413 * ISO 3166 definitions were updated.
415 * The localedef utility now supports --big-endian and --little-endian
416 command-line options to generate locales for a different system from that
417 for which the C library was built.
419 * Binary locale files now only depend on the endianness of the system for
420 which they are generated and not on other properties of that system. As a
421 consequence, binary files generated with new localedef may be incompatible
422 with old versions of the GNU C Library, and binary files generated with
423 old localedef may be incompatible with this version of the GNU C Library,
424 in the following circumstances:
426 + Locale files may be incompatible on m68k systems.
428 + Locale archive files (but not separate files for individual locales) may
429 be incompatible on systems where plain "char" is signed.
431 * The configure option --disable-versioning has been removed. Builds with
432 --disable-versioning had not worked for several years.
434 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
435 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
437 * SystemTap probes for malloc have been introduced.
439 * SystemTap probes for slow multiple precision fallback paths of
440 transcendental functions have been introduced.
442 * Support for powerpc64le has been added.
444 * The soft-float powerpc port now supports e500 processors.
446 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
448 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
449 set of header declarations that are enabled by default, even when other
450 feature test macros or compiler options such as -std=c99 would otherwise
451 disable some of those declarations.
453 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
454 conflict with POSIX. The libbsd-compat library (which was a dummy library
455 that did nothing) has also been removed.
457 * Preliminary documentation about Multi-Thread, Async-Signal and
458 Async-Cancel Safety has been added.
460 * Change of ABI data structures for s390 and s390x:
461 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
462 allow for future hardware extensions. All library functions that accept or
463 return these structures were versioned in order to provide backwards
464 compatibility with existing code. However, not all cases can be handled
465 with interface versioning. If an application embeds either structure into
466 another structure and that structure is passed to another compilation unit
467 which expects the newer larger-sized object then any access to the new
468 fields will result in undefined behaviour. Similarly any access to fields
469 that were moved by the enlarging of the structures will cause undefined
470 behaviour. To fix the undefined behaviour all objects that are part of the
471 final in-memory image must agree on the size of structures, and this may
472 require recompilation.
476 * The following bugs are resolved with this release:
478 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
479 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
480 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
481 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
482 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
483 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
484 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
485 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
486 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
487 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
488 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
489 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
490 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
493 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
494 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
495 Distributions can re-enable building and using pt_chown via the new configure
496 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
497 considerable security risks and should only be used if the distribution
498 understands and accepts the risks.
500 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
503 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
504 fixed (Bugzilla #15330).
506 * Add support for calling C++11 thread_local object destructors on thread
507 and program exit. This needs compiler support for offloading C++11
508 destructor calls to glibc.
510 * Improved worst case performance of libm functions with double inputs and
513 * Support for priority inherited mutexes in pthread condition variables on
514 non-x86 architectures.
516 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
518 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
520 * Optimized string functions for ARM. Implemented by Will Newton and
523 * Optimized libm functions for SPARC. Implemented by David S. Miller.
525 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
528 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
529 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
531 * Added a benchmark framework to track performance of functions in glibc.
533 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
534 It is based on draft TS 18661 and currently enabled as a GNU extension.
536 * On Linux, the clock function now uses the clock_gettime system call
537 for improved precision, rather than old times system call.
539 * Added support for version-3 tz format files. This is needed when using
540 the tz database release 2013e or later, and affects a few unusual cases --
541 currently only TZ='America/Godthab' for time stamps after 2037.
543 * Added new API functions pthread_getattr_default_np and
544 pthread_setattr_default_np to get and set the default pthread
545 attributes of a process.
547 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
548 This may improve lock scaling of existing programs on TSX capable systems.
549 When the --enable-lock-elision=yes parameter is specified at configure
550 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
553 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
554 availability). Implemented by Ryan S. Arnold.
556 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
560 * The following bugs are resolved with this release:
562 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
563 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
564 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
565 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
566 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
567 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
568 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
569 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
570 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
571 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
572 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
573 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
574 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
575 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
576 14879, 14889, 14893, 14898, 14914.
578 * Optimization of memcpy for MIPS.
580 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
581 EMFILE has been fixed (Bugzilla #14889).
583 * The add-on ports collection is now distributed in the "ports" subdirectory
584 of the main GNU C Library distribution, rather than separately.
586 * Port to ARM AArch64 contributed by Linaro.
588 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
589 Optimized versions of memcpy, memset, and memcmp added for System z10 and
591 Implemented by Andreas Krebbel.
593 * The new function secure_getenv allows secure access to the environment,
594 returning NULL if running in a SUID/SGID process. This function replaces
595 the internal function __secure_getenv.
597 * SystemTap static probes have been added into the dynamic linker.
598 Implemented by Gary Benson.
600 * Optimizations of string functions strstr, strcasestr and memmem.
601 Implemented by Maxim Kuvyrkov.
603 * The minimum Linux kernel version that this version of the GNU C Library
604 can be used with is 2.6.16.
606 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
607 powerpc POWER7. Implemented by Will Schmidt.
609 * New configure option --disable-nscd builds the C library such that it
610 never attempts to contact the Name Service Caching Daemon (nscd).
611 New configure option --disable-build-nscd avoids building nscd itself;
612 this is the default if --disable-nscd is used.
614 * Improved support for cross-compilation, including cross-testing and
615 bootstrap builds without a previously built glibc.
617 * Several testsuite tests are now able to test multiple IFUNC variants of an
618 interface, rather than just testing the one that would be chooen by
621 * New configure options --with-bugurl and --with-pkgversion, for
622 distributors to use to embed their bug-reporting and package version
623 information in --help and --version output.
625 * The ttyname and ttyname_r functions on Linux now fall back to searching for
626 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
627 allows creation of chroots without the procfs mounted on /proc.
629 * The `crypt' function now fails if passed salt bytes that violate the
630 specification for those values. On Linux, the `crypt' function will
631 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
632 enabled, and fail on encrypted strings using the MD5 or DES algorithm
633 when the mode is enabled.
635 * The `clock_*' suite of functions (declared in <time.h>) is now available
636 directly in the main C library. Previously it was necessary to link with
637 -lrt to use these functions. This change has the effect that a
638 single-threaded program that uses a function such as `clock_gettime' (and
639 is not linked with -lrt) will no longer implicitly load the pthreads
640 library at runtime and so will not suffer the overheads associated with
641 multi-thread support in other code such as the C++ runtime library.
643 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
648 * The following bugs are resolved with this release:
650 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
651 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
652 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
653 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
654 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
655 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
656 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
657 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
658 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
659 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
660 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
661 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
662 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
663 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
664 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
665 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
666 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
667 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
668 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
669 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
670 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
671 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
674 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
675 configuring glibc with:
676 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
677 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
678 Implemented by H.J. Lu.
682 + define static_assert
684 + do not declare gets
686 + declare at_quick_exit and quick_exit also for ISO C11
688 + aligned_alloc. NB: The code is deliberately allows the size parameter
689 to not be a multiple of the alignment. This is a moronic requirement
690 in the standard but it is only a requirement on the caller, not the
695 + uchar.h support added
697 + CMPLX, CMPLXF, CMPLXL added
699 Implemented by Ulrich Drepper.
701 * Support for the IA-64 has been moved to ports.
703 * Remove support for anything but ELF binary format
705 * Checking versions of poll, ppoll added.
706 Implemented by Ulrich Drepper.
708 * More generic and 64-bit performance optimizations to math functions.
709 Implemented by Ulrich Drepper.
711 * New configure option --enable-obsolete-rpc makes the deprecated RPC
712 headers and functions available at compile time as they were before
713 version 2.14. This option will be removed at some time in the future
714 after the TI-RPC library becomes fully sufficient for the needs of
715 existing applications.
717 * Compatibility code for Linux kernel versions before 2.4 has been removed.
718 Note that glibc is not expected to work with any Linux kernel version
721 * New header <sys/auxv.h> and function getauxval allowing easy access to
722 the AT_* key-value pairs passed from the Linux kernel. The header also
723 defines the HWCAP_* bits associated with the AT_HWCAP key.
725 * New locales: mag_IN
727 * New configure option --enable-systemtap builds SystemTap static probes
728 into libc for setjmp and longjmp and into libpthread for various operations.
729 So far the setjmp/longjmp probes and some of the libpthread probes are
730 provided only for i*86 and x86_64.
731 Implemented by Roland McGrath and Rayson Ho.
733 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
735 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
738 * More optimized functions for SPARC. Implemented by David S. Miller.
740 * Improved support for cross-compilation, especially bootstrap builds
741 without a previously built glibc.
743 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
744 Chris Metcalf from Tilera.
746 * Support for the old ARM ABI has been removed from ports. Only the EABI is
747 now supported for ARM processors.
749 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
750 as the name of the dynamic linker, to distinguish it from the
751 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
753 * Support for CRIS has been removed from ports.
755 * A new class of installed header has been documented for low-level
756 platform-specific functionality. PowerPC added the first instance with a
757 function to provide time base register access. Contributed by Tulio
758 Magno Quites Machado Filho.
760 * ix86 configurations now install header files that are consistent with
761 what x86-64 configurations install. These same header files can be used
762 for -m32, -m64, or -mx32 builds.
763 Contributed by H.J. Lu.
765 * Math library bug fixes. A thorough audit of all open math library bugs was
766 conducted by Joseph Myers. Significant progress was made on many math
767 library bugs resulting in more accurate exceptions and function results.
768 Many thanks to all those that contributed including Andreas Jaeger for his
769 patch review and work on the x87 trigonometric instruction issues.
771 * Timezone data is no longer installed. Timezone-related binaries and scripts
772 will continue to be installed. Users should obtain their timezone data from
773 their distribution provider or from the tzdata package at
774 <ftp://munnari.oz.au/pub/>.
778 * The following bugs are resolved with this release:
780 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
781 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
782 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
783 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
784 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
785 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
786 13484, 13506, 13515, 13523, 13524, 13538, 13540
788 * New program pldd to list loaded object of a process
789 Implemented by Ulrich Drepper.
791 * Add nss_db support back to glibc. No more dependency on Berkeley db
792 and support for initgroups lookups.
793 Implemented by Ulrich Drepper.
795 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
796 Contributed by HJ Lu.
798 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
799 Contributed by HJ Lu.
801 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
802 on x86-32 and x86-64.
803 Contributed by Liubov Dmitrieva.
805 * Optimized strchr and strrchr for SSE on x86-32.
806 Contributed by Liubov Dmitrieva.
808 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
809 for x86-64 and x86-32.
810 Contributed by Liubov Dmitrieva.
812 * New interfaces: scandirat, scandirat64
813 Implemented by Ulrich Drepper.
815 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
816 Implemented by Ulrich Drepper.
818 * nscd now also caches the netgroup database.
819 Implemented by Ulrich Drepper.
821 * Integrate libm with gcc's -ffinite-math-only option.
822 Implemented by Ulrich Drepper.
824 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
825 to math functions. Implemented by Ulrich Drepper.
827 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
828 Implemented by Ulrich Drepper.
830 * New Linux interfaces: process_vm_readv, process_vm_writev
832 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
833 Implemented by Ulrich Drepper.
835 * Optimized nearbyint and strcasecmp for PPC.
836 Implemented by Adhemerval Zanella.
838 * New locales: bho_IN, unm_US, es_CU, ta_LK
842 * The following bugs are resolved with this release:
844 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
845 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
846 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
847 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
848 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
849 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
850 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
851 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
852 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
853 12795, 12811, 12813, 12814, 12841
855 * The RPC implementation in libc is obsoleted. Old programs keep working
856 but new programs cannot be linked with the routines in libc anymore.
857 Programs in need of RPC functionality must be linked against TI-RPC.
858 The TI-RPC implementation is IPv6 enabled and there are other benefits.
860 Visible changes of this change include (obviously) the inability to link
861 programs using RPC functions without referencing the TI-RPC library and the
862 removal of the RPC headers from the glibc headers.
863 Implemented by Ulrich Drepper.
865 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
866 syncfs, setns, sendmmsg
868 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
869 yue_HK, lij_IT, mhr_RU
871 * New encodings: CP770, CP771, CP772, CP773, CP774
873 * New program sotruss to trace calls through PLTs
874 Implemented by Ulrich Drepper.
876 * The malloc hook implementation is marked deprecated and will be removed
877 from the default implementation in the next version. The design never
878 worked ever since the introduction of threads. Even programs which do
879 not create threads themselves can use multiple threads created internally.
883 * The following bugs are resolved with this release:
885 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
886 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
887 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
888 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
891 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
893 * POWER7 optimizations: memset, memcmp, strncmp
895 * New optimized string functions for x86-64: strnlen (SSE2),
896 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
897 Implemented by Ulrich Drepper.
901 * The following bugs are resolved with this release:
903 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
904 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
905 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
906 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
907 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
908 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
909 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
910 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
912 * New interfaces: pthread_getname_np, pthread_setname_np
914 * New Linux interface: recvmmsg
916 * STT_GNU_IFUNC implemented for Sparc by David Miller.
918 * The dynamic linker now recognizes supported ABI versions from the
919 EI_ABIVERSION field in the ELF header.
920 Implemented by Ulrich Drepper.
922 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
923 will not be used to fill in password fields in the passwd.byname replies.
924 Instead it is used to synthesize the shadow.byname table, should it be
925 missing. This is a useful mode in some installations involving Solaris.
926 Implemented by Ulrich Drepper.
928 * New locales: kok_IN, sq_MK, cv_RU
932 * The following bugs are resolved with this release:
934 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
935 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
936 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
937 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
938 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
939 10789, 10817, 10823, 10840, 10847
941 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
943 Implemented by Ulrich Drepper.
945 * Checking version of longjmp added that fails if an uninitialized stack
946 frame would be created. Implemented by Ulrich Drepper.
948 * STT_GNU_IFUNC is now supported in static executables.
949 Implemented by H.J. Lu.
951 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
953 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
954 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
955 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
956 Contributed by H.J. Lu.
958 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
959 Implemented by Ulrich Drepper.
961 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
963 Contributed by H.J. Lu.
965 * Support for fma instruction in AVX on x86-64.
966 Implemented by H.J. Lu and Ulrich Drepper.
968 * AVX support in x86-64 auditing support in ld.so.
969 Implemented by H.J. Lu.
971 * STB_GNU_UNIQUE support added.
972 Implemented by Ulrich Drepper.
974 * Implement second fallback mode for optimized DNS lookup for even more
975 broken environments. If two requests from the same port are not
976 handled correctly close the socket and open a new one before sending
977 the second request. The 'single-request-reopen' option in /etc/resolv.conf
978 can be used to select this mode right away, instead of rediscovering the
979 necessity is every process again.
980 Implemented by Ulrich Drepper.
982 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
983 Implemented by Adam Tkac.
985 * Optimized iconv conversions for S390x.
986 Implemented by Andreas Krebbel.
988 * Using condvars with PI mutexes is now more efficient due to kernel
989 support for requeueing to PI futexes. NPTL support added for x86-64.
990 Implemented by Ulrich Drepper.
992 * New locales: ps_AF, my_MM
996 * The following bugs are resolved with this release:
998 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
999 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1000 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1001 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1002 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1004 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1005 Implemented by Ulrich Drepper.
1007 * New Linux interfaces: accept4, fallocate, fallocate64.
1008 Implemented by Ulrich Drepper.
1010 * Correct declarations of string function when used in C++ code. This
1011 could lead to compile errors for invalid C++ code.
1013 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1016 * New POSIX 2008 interface: psiginfo
1017 Implemented by Ulrich Drepper.
1019 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1020 Implemented by Ulrich Drepper.
1022 * Support for selecting between multiple function definitions at runtime
1023 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1025 * The libcrypt library can now use the hash function implementations in
1026 NSS. Implemented by Ulrich Drepper.
1028 * The malloc implementation can be compiled to be less memory efficient
1029 but higher performing in multi-threaded programs.
1030 Implemented by Ulrich Drepper.
1032 * New locales: nan_TW@latin, ks_IN
1034 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1035 Implemented by Ulrich Drepper.
1037 * Extended printf hook support. It is possible to use user-defined types
1038 and extend existing format specifiers.
1039 Implemented by Ulrich Drepper.
1041 * Handling for group shadow files has been added.
1042 Implemented by Ulrich Drepper.
1044 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1045 servers (the case, e.g., for some people using the built-in DNS
1046 server in ADSL modems/routers). There is a once-per-process timeout
1047 in case of a broken server. To avoid it, users can run nscd or put
1048 'options single-request' in /etc/resolv.conf.
1049 Implemented by Ulrich Drepper.
1053 * The following bugs are resolved with this release:
1055 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1056 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1057 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1058 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1059 6968, 6974, 6980, 6995, 7008, 7009, 7029
1061 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1062 up at the same time. Implemented by Ulrich Drepper.
1064 * TLS descriptors for LD and GD on x86 and x86-64.
1065 Implemented by Alexandre Oliva.
1067 * getaddrinfo now handles DCCP and UDPlite.
1068 Implemented by Ulrich Drepper.
1070 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1071 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1072 Implemented by Ulrich Drepper.
1074 * New implementation of memmem, strstr, and strcasestr which is O(n).
1075 Implemented by Eric Blake.
1077 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1079 * Implement "e" option for popen to open file descriptor with the
1080 close-on-exec flag set. Implemented by Ulrich Drepper.
1082 * Implement "b" mode for fmemopen. In this mode writes writes don't
1083 implicitly add a NUL byte and seeks from the end of the buffer really
1084 use the buffer end, not the string length as the basis.
1085 Implemented by Ulrich Drepper.
1087 * Many functions, exported and internal, now atomically set the close-on-exec
1088 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1090 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1092 Implemented by Pravin Satpute.
1094 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1098 * The following bugs are resolved with this release:
1100 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1101 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1102 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1103 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1104 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1105 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1106 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1108 * New locales: bo_CN, bo_IN, shs_CA.
1110 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1112 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1113 Implemented by Pravin Satpute.
1115 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1117 * nscd caches now all timeouts for DNS entries
1118 Implemented by Ulrich Drepper.
1120 * nscd is more efficient and wakes up less often.
1121 Implemented by Ulrich Drepper.
1123 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1124 vdprintf, and obstack_vprintf.
1125 Implemented by Jakub Jelinek.
1127 * Faster memset for x86-64.
1128 Implemented by Harsha Jagasia and H.J. Lu.
1130 * Faster memcpy on x86.
1131 Implemented by Ulrich Drepper.
1133 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1134 Implemented by Ulrich Drepper.
1136 * Faster sqrt and sqrtf implemention for some PPC variants.
1137 Implemented by Steven Munroe.
1141 * The following bugs are resolved with this release:
1143 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1144 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1145 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1146 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1147 5071, 5103, 5104, 5112, 5113, 5184, 5186
1149 * More checking functions: fread, fread_unlocked, open*, mq_open.
1150 Implemented by Jakub Jelinek and Ulrich Drepper.
1152 * Extend fortification to C++. Implemented by Jakub Jelinek.
1154 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1155 by not recognizing 'a' as a modifier when those specs are requested.
1156 Implemented by Jakub Jelinek.
1158 * PPC optimizations to math and string functions.
1159 Implemented by Steven Munroe.
1161 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1162 options to be passed. Implemented by Ulrich Drepper.
1164 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1166 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1167 Implemented by Ulrich Drepper.
1169 * Handle private futexes in the NPTL implementation.
1170 Implemented by Jakub Jelinek and Ulrich Drepper.
1172 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1173 Implemented by Roland McGrath and Ulrich Drepper.
1175 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1177 * SHA-256 and SHA-512 based password encryption.
1178 Implemented by Ulrich Drepper.
1180 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1181 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1184 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1185 Implemented by Ulrich Drepper.
1189 * The following bugs are resolved with this release:
1191 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1192 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1193 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1194 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1195 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1196 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1197 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1200 * New Linux interfaces: epoll_pwait, sched_getcpu.
1202 * New generic interfaces: strerror_l.
1204 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1208 * The following bugs are resolved with this release:
1210 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1211 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1212 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1213 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1214 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1215 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1216 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1217 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1218 3225, 3251, 3252, 3253, 3273
1220 * For Linux, the sorting of addresses returned by getaddrinfo now also
1221 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1222 Implemented by Ulrich Drepper.
1224 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1225 Implemented by Ulrich Drepper.
1227 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1229 * New iconv module for MIK. Contributed by Alexander Shopov.
1231 * For sites with broken group and/or passwd database, the auto-propagate
1232 option of nscd can prevent creating ID lookup entries from the results
1233 of a name lookup and vice versa. This usually is no problem but some
1234 site might have problems with the default behavior.
1235 Implemented by Ulrich Drepper.
1237 * Iterating over entire database in NIS can be slow. With the
1238 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1239 to trade time for memory. The entire database will be read at once.
1240 Implemented by Ulrich Drepper.
1242 * The interfaces introduced in RFC 3542 have been implemented by
1245 * Support for the new ELF hash table format was added by Ulrich Drepper.
1247 * Support for priority inheritance mutexes added by Jakub Jelinek and
1250 * Support for priority protected mutexes added by Jakub Jelinek.
1252 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1253 or_IN, csb_PL, fy_NL, sr_ME.
1257 * More overflow detection functions.
1259 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1260 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1262 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1263 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1264 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1265 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1266 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1267 by Masahide Washizawa.
1269 * It is now possible to install audit libraries for the dynamic linker using
1270 LD_AUDIT. Implemented by Ulrich Drepper.
1272 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1273 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1274 For a libc and libpthread that works well on Linux 2.4 kernels, we
1275 recommend using the stable 2.3 branch.
1277 * The new function open_wmemstream acts like open_memstream,
1278 but uses a wchar_t wide character buffer.
1280 * The new function ppoll is an improved version of poll, similar to pselect.
1282 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1283 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1284 renameat, unlinkat, linkat, symlinkat, readlinkat.
1286 * New Linux kernel system calls: unshare,
1287 inotify_init, inotify_add_watch, inotify_rm_watch.
1289 * The euidaccess function is now also known by the alias eaccess,
1290 for compatibility with some other systems.
1292 * Timezone data updated to 2006b version.
1296 * The following bugs are resolved with this release:
1298 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1299 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1300 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1301 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1302 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1303 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1305 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1307 * As of this release, GCC 4 can be used to compile the C Library.
1309 * Timezone data updated to 2005m version.
1313 * The following bugs are resolved with this release:
1315 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1316 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1317 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1318 777, 787, 821, 822, 823, 825
1320 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1324 * Support for RFC 3678. Real implementations exist only for Linux so far.
1325 Implemented by Ulrich Drepper.
1327 * nscd can now cache entries persistently. Expiring entries are reloaded.
1328 For speedups the cache can be shared in memory with client processes.
1329 Implemented by Ulrich Drepper.
1331 * nscd can now perform SELinux checks.
1332 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1334 * getaddrinfo queries are now cached. Canonical name lookup is performed
1336 Implemented by Ulrich Drepper.
1338 * The nothrow function attribute is used when headers are used by gcc when
1339 compiling C code. This can avoid significant amounts of exception
1342 * The malloc functions perform more error checking and are stricter when
1343 it comes to reacting on errors. The default action is to terminate
1344 the process after showing an error message. Implemented by Ulrich Drepper.
1346 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1347 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1349 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1350 namespaces using the new function dlmopen(). This feature is of course,
1351 like most other dynamic loading functionality, not available in statically
1352 linked applications. Implemented by Ulrich Drepper.
1354 * Low-overhead boundary checking variants of string and some stdio functions
1355 were added. These are to be used in conjunction with a gcc patch by
1356 Jakub Jelinek which adds calls to these functions if possible.
1357 Implemented by Jakub Jelinek and Ulrich Drepper.
1359 * Old code for several operating systems and machine architectures that
1360 have not been in working condition in a long time have been removed from
1361 the main source tree maintained by the GNU C Library's maintainers.
1362 These files are now reside in the separate `ports' source module
1363 that is usable as an add-on when building the library.
1367 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1368 interrogate the dynamic linker, compatible with the Solaris interface.
1370 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1371 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1373 * getifaddrs now uses the netlink interface on Linux to get its information.
1374 Implemented by Thorsten Kukuk.
1376 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1377 Implemented by Ulrich Drepper.
1379 * support for non-executable stacks on x86 has been added. Changes mostly
1382 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1385 * getaddrinfo now performs destination address selection according to
1390 * Thread-safe interfaces for many functions that access locale data
1391 were added in version 2.3, but these features were omitted from NEWS.
1392 Many functions have variants with an `_l' suffix that take a `locale_t'
1393 object as a parameter rather than consulting the current locale.
1394 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1395 create and maintain `locale_t' objects. Additionally, the new function
1396 `uselocale' sets "the current locale" (as used by functions not so
1397 parameterized) set for an individual thread. These features were added
1398 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1400 * The functions getresuid, getresgid, setresuid, and setresgid, which
1401 have long been available on Linux, are now declared in <unistd.h>
1402 and are now also available on the Hurd.
1404 * ELF thread-local storage support (TLS) now works on x86-64.
1406 * The new dynamic string token $LIB is expanded in shared library names.
1407 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1409 * Aldy Hernandez contributed complete software floating point support for
1410 PowerPC machines with no FPU.
1412 * fexecve is implemented on Linux.
1414 * The `btowc' function should work at least twice as fast due to
1415 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1417 * With approriate thread add-ons cancelable functions are now implemented
1418 in libc.so as well. No need to call the function in libpthread. This
1419 change allowed to finally disable the incorrect and expensive handling
1420 of weak definition in ld.so.
1422 * Yet more PLT entries in libc.so have been removed. We finally arrived
1423 at the bare minimum. Startup times improved appropriately.
1425 * Support for the new Linux/x86 system call interface was added. The
1426 AT_SYSINFO auxiliary vector entry is recognized and handled.
1430 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1433 * iconv (the program and the interface) now accepts empty names (excluding
1434 options like //TRANSLIT) to mean "use charset of current locale".
1436 * localedef can now transliterate characters in strings which are not in
1437 the provided charmap. The information from the input locale is used.
1439 * Prelinking support was added for ELF targets. This requires additional
1440 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1442 * Read-only stdio streams now use mmap to speed up operation by eliminating
1443 copying and buffer underflows. To use add 'm' to the mode string of
1444 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1446 * The malloc functions were completely rewritten by Wolfram Gloger based
1447 on Doug Lea's malloc-2.7.0.c.
1449 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1450 implementation of regex.
1452 * Bruno Haible upgraded the iconv and locale implementation to support
1455 * Contents of the LC_* and LANG environment variables in the CEN style are
1456 not recognized anymore. It never was used. Change by Ulrich Drepper.
1458 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1459 thread-local storage (TLS) ABI on some platforms.
1460 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1462 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1463 EUC-JISX0213, and TSCII.
1465 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1466 BSD-compatible interface for getting all network interface addresses.
1467 Implementation for IPv4 by Roland McGrath.
1469 * Loading of locale data is faster due to the introduction of a locale
1470 archive. Implemented by Roland McGrath and Ulrich Drepper.
1472 * Startup times are significantly reduced by not using exported functions
1473 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1476 * Steven Munroe contributed a port to PowerPC64/Linux.
1480 * The Hurd now uses the GNU libio implementation of stdio rather than the
1481 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1483 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1484 with the same behavior as the Linux system call of the same name.
1488 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1489 128-bit long double format.
1491 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1492 IBM1161, and IBM1162 charsets.
1494 * Andreas Jaeger contributed a port to x86-64/Linux.
1496 * Peter Bruin contributed a port to PowerPC/Hurd.
1498 * libc functions using I/O streams now can handle wide-oriented streams
1501 * optimizations in the dynamic linker. Binaries created by recent binutils
1502 versions start up quicker due to reduced time spent on relocations.
1504 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1508 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1509 asinh, atanh, j0 for the 128-bit long double format.
1511 * Bruno Haible updated all the code handling Unicode in some form to
1512 support Unicode 3.1.
1514 * Speed of regex for single-byte locales is back to previous levels.
1515 Patch by Isamu Hasegawa.
1517 * Alpha, SPARC, and IA-64 now also using floating stacks.
1519 * Startup time of internationalized applications greatly improved through
1520 iconv cache. Use iconvconfig to generate the cache file.
1521 Contributed by Ulrich Drepper.
1523 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1524 severe performance problems. Patch by David Mosberger.
1526 * The Hurd port got a lot more functionality like AIO, various stdio
1527 extensions, etc. Mainly done by Roland McGrath.
1529 * mtrace can now lookup symbols in shared libraries.
1533 * Intel's IA-64 math library is largely integrated. It provides fast and
1534 accurate implementatations for most basic and standard math functions
1535 in float, double, and long double format.
1537 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1538 and asin for the 96-bit long double format and asin, log, tan for the
1539 128-bit long double format.
1541 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1542 The basic double functions exist today. Contributed by Abraham Ziv
1543 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1544 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1546 * An asynchronous name lookup library was added. The interface is designed
1547 after POSIX AIO. The proposal was circulated beforehand to get comments.
1548 No negative ones came in. Implemented by Ulrich Drepper.
1550 * Port to S390/64bit contributed by Martin Schwidefsky
1551 <schwidefsky@de.ibm.com>.
1553 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1554 of functions for Linux/IA-64.
1556 * The RPC code is now thread safe. Threads can now use the same service
1557 of different services at the same time. Patch by Eric Norum
1558 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1560 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1561 family of functions for Linux/S390.
1563 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1564 of functions for Linux/x86.
1566 * Port to Linux/CRIS contributed by Axis Communications.
1570 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1571 we can now check for namespace violations and missing declarations. The
1572 result is that almost all headers are now Unix-compliant (as defined in
1573 the upcoming XPG6). The negative side is that some programs might need
1574 corrections, too, if they depend on the incorrect form of the headers in
1575 previous versions which defined too many symbols and included too many
1578 * regex now handles multibyte character sets correctly.
1579 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1581 * iconv (the program) does now conform to the upcoming XPG6 and handles
1582 charmaps. Instead of the charset names the path of charmaps can be
1583 provided and the conversion happens based on this data.
1584 Contributed by Ulrich Drepper.
1586 * The locale program now provides detailed information about the installed
1591 only lists the names of the supported locales
1595 provides details such as country, language, and codeset name.
1596 Contributed by Ulrich Drepper.
1600 * The gencat program now parses the input file according to the charset
1601 selected by the LC_CTYPE category. This is important for stateful
1602 character sets. To make generating catalogs easier there is a way
1603 to overwrite the charset selected by the locale: before the first
1604 message or $ quote line the catalog can contain a line like
1606 $ codeset=ISO-8859-2
1608 to select the charset (ISO-8859-2 in this case).
1610 Implemented by Shinya Hanataka and Ulrich Drepper.
1612 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1613 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1614 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1616 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1617 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1619 * The LANGUAGE environment variable is now ignored unless the locale is
1620 changed from the default "C" locale.
1622 * The usual bug fixes.
1626 * Greg McGary added runtime support for bounds checking using gcc's
1627 new -fbounded-pointers option. ix86 target is complete. PowerPC
1630 * Thorsten Kukuk added secure mode support to nscd.
1632 * The Berkeley db libraries have been removed.
1634 Related, the nss_db module is now in a separate package since it
1635 obviously requires a database library being available.
1637 * Wide character I/O streams implemented by Ulrich Drepper.
1639 * Functions from the extended socket API added by Ulrich Drepper.
1641 * Functions feenableexcept and fedisableexcept to control the
1642 behaviour of individual exceptions have been added by Andreas Jaeger.
1644 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1646 * The resolver code has been updated from bind 8.2.3-T5B which supports
1647 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1650 This change could in some situations effect backward compatibility. Since
1651 now `_res' is a thread-local instead of a global variable, modifying it
1652 in one thread does not have any effect in other threads.
1654 The resolver library was also extended to allow IPv6 as the transport
1655 protocol for the requests. This work was done by Stig Venaas.
1657 * Compatibility code for K&R C compilers has been removed from the
1658 header files. A ISO C compiler is needed to use the library
1659 (conforming to either C89 or C99 standard).
1661 * Complete rewrite of the localedef program to support multibyte character
1662 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1663 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1664 Implemented by Ulrich Drepper.
1666 Bruno Haible significantly improved the generation and use of the data
1667 structures for the wide character tables.
1669 * Plural handling in gettext implemented by Ulrich Drepper.
1671 * The utmp daemon has been removed.
1673 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1675 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1678 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1680 * POSIX barriers implemented by Kaz Kylheku.
1682 * POSIX spawn function family implemented by Ulrich Drepper.
1684 * POSIX spinlocks are now available.
1686 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1688 * the configure option --enable-kernel=X.Y.Z allows to strip out
1689 compatibility for kernel versions before X.Y.Z. This is currently only
1690 implemented for Linux.
1692 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1693 field sin6_scope_id. This means that all programs using IPv6 should be
1694 recompiled. Don't expect binary compatibility with previous glibc
1697 * various conversion modules for IBM character sets contributed by
1700 * IA-64 port by Jes Sorensen and HJ Lu.
1714 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1716 * New xdr functions are added; some rpc functions are now 64bit clean.
1718 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1720 * Fixed known incompatibilities with glibc 2.0.
1722 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1724 * Optimized a number of functions (especially the ELF dynamic loader).
1726 * Update timezone data files.
1728 * lots of charmaps corrections
1730 * some new locale definitions and charmaps
1735 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1736 conform to POSIX member type requirements. Symbol versions have been
1737 adjusted as needed within the library, and for direct use by applications,
1738 but there is potential for problems if third-party libraries use
1739 struct timeval as part of their interface. This does not present
1740 a problem for X and other "essential" system libraries.
1742 * An additional locale model to support C++ Standard Library locale
1743 model and probably more was implemented by Ulrich Drepper.
1745 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1748 * Miles Bader provided the `argp' function family to support hierachical
1749 command line argument parsing, layered on top of getopt.
1751 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1753 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1756 * scanf recognizes the %a and %A format for scanning floating point numbers.
1758 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1759 information and interfaces for the available integer types.
1761 * about 130 new math functions were added to implement the ISO C9x math
1764 * the new header <complex.h> contains definitions of the complex math
1765 functions from ISO C 9X.
1767 * the new header <tgmath.h> defines generic macros to use complex or
1768 real valued functions.
1770 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1772 * Andreas Jaeger provided a test suite for the math library.
1774 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1776 * Ulrich Drepper added character set conversion functions (iconv).
1778 * Optimized string functions have been added.
1780 * The localedata addon is now part of glibc.
1782 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1784 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1785 daemon for NSS (nscd).
1787 Missing a better place here are some numbers on improvements. Under
1788 Linux 2.1.125 un-tar-ing the kernel sources takes
1792 using local files 12.19s 6.88s 22.91s
1794 using NIS 13.92s 8.91s 26.34s
1796 using NIS & nscd 10.37s 7.34s 25.30s
1798 using NIS+ 27.57s 30.37s 640.46s
1800 using NIS+ & nscd 10.25s 7.83s 26.51s
1802 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1804 Keep in mind that non-namelookup related operations dominate above times.
1805 It was just a common complain that using NIS+ unpacking the kernel is
1808 [1] The old nscd implementation is not available anymore since it was
1809 distributed with glibc up to version 2.0.98 and thus is now replaced.
1811 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1813 * Mark Kettenis provided a Hesiod NSS module.
1815 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1816 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1818 * rcmd can now handle netgroups (Dick Streefland).
1820 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1823 * Support for the IPv6 protocol has been added to the socket API, as per the
1824 latest draft standards.
1826 * Support for Linux 2.2 has been added.
1828 * Interface changes relative to the latest 2.0.x release:
1829 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1830 addseverity NEW: Unix98
1831 alphasort64 NEW: LFS
1832 argp_err_exit_status NEW: argp, GNU ext
1833 argp_error NEW: argp, GNU ext
1834 argp_failure NEW: argp, GNU ext
1835 argp_help NEW: argp, GNU ext
1836 argp_parse NEW: argp, GNU ext
1837 argp_program_bug_address NEW: argp, GNU ext
1838 argp_program_version NEW: argp, GNU ext
1839 argp_program_version_hook NEW: argp, GNU ext
1840 argp_state_help NEW: argp, GNU ext
1841 argp_usage NEW: argp, GNU ext
1842 authdes_create NEW: Secure RPC
1843 authdes_getucred NEW: Secure RPC
1844 authdes_pk_create NEW: Secure RPC
1845 backtrace NEW: GNU ext.
1846 backtrace_symbols NEW: GNU ext.
1847 backtrace_symbols_fd NEW: GNU ext.
1849 cacosf NEW: ISO C 9x
1850 cacosh NEW: ISO C 9x
1851 cacoshf NEW: ISO C 9x
1852 cacoshl NEW: ISO C 9x
1853 cacosl NEW: ISO C 9x
1860 casinf NEW: ISO C 9x
1861 casinh NEW: ISO C 9x
1862 casinhf NEW: ISO C 9x
1863 casinhl NEW: ISO C 9x
1864 casinl NEW: ISO C 9x
1866 catanf NEW: ISO C 9x
1867 catanh NEW: ISO C 9x
1868 catanhf NEW: ISO C 9x
1869 catanhl NEW: ISO C 9x
1870 catanl NEW: ISO C 9x
1871 cbc_crypt NEW: Secure RPC
1875 ccoshf NEW: ISO C 9x
1876 ccoshl NEW: ISO C 9x
1882 cimagf NEW: ISO C 9x
1883 cimagl NEW: ISO C 9x
1884 clearerr_locked REMOVED
1885 clntunix_create NEW: sunrpc ext
1887 clog10 NEW: ISO C 9x
1888 clog10f NEW: ISO C 9x
1889 clog10l NEW: ISO C 9x
1899 cprojf NEW: ISO C 9x
1900 cprojl NEW: ISO C 9x
1902 crealf NEW: ISO C 9x
1903 creall NEW: ISO C 9x
1908 csinhf NEW: ISO C 9x
1909 csinhl NEW: ISO C 9x
1912 csqrtf NEW: ISO C 9x
1913 csqrtl NEW: ISO C 9x
1917 ctanhf NEW: ISO C 9x
1918 ctanhl NEW: ISO C 9x
1920 des_setparity NEW: Secure RPC
1921 ecb_crypt NEW: Secure RPC
1922 endutxent NEW: Unix98
1924 exp10f NEW: ISO C 9x
1925 exp10l NEW: ISO C 9x
1929 fattach NEW: STREAMS
1930 fdetach NEW: STREAMS
1934 feclearexcept NEW: ISO C 9x
1935 fegetenv NEW: ISO C 9x
1936 fegetexceptflag NEW: ISO C 9x
1937 fegetround NEW: ISO C 9x
1938 feholdexcept NEW: ISO C 9x
1940 feraiseexcept NEW: ISO C 9x
1941 ferror_locked REMOVED
1942 fesetenv NEW: ISO C 9x
1943 fesetexceptflag NEW: ISO C 9x
1944 fesetround NEW: ISO C 9x
1945 fetestexcept NEW: ISO C 9x
1946 feupdateenv NEW: ISO C 9x
1947 fflush_locked REMOVED
1951 fgets_unlocked NEW: GNU ext.
1952 fileno_locked REMOVED
1964 fputc_locked REMOVED
1965 fputs_unlocked NEW: GNU ext.
1966 fread_unlocked NEW: GNU ext.
1971 fstatvfs NEW: Unix98
1975 ftruncate64 NEW: LFS
1977 fwrite_unlocked NEW: GNU ext.
1978 gai_strerror NEW: IPv6
1982 getchar_locked REMOVED
1984 getdate_err NEW: Unix98
1985 getdate_r NEW: GNU ext.
1987 getnameinfo NEW: IPv6
1988 getnetname NEW: Secure RPC
1989 getpmsg NEW: STREAMS
1990 getpt NEW: Unix98 PTY
1991 getrlimit64 NEW: LFS
1992 getutxent NEW: Unix98
1993 getutxid NEW: Unix98
1994 getutxline NEW: Unix98
1995 glob64 NEW: GNU ext.
1996 globfree64 NEW: GNU ext.
1997 gnu_get_libc_release NEW: GNU ext.
1998 gnu_get_libc_version NEW: GNU ext.
1999 grantpt NEW: Unix98 PTY
2000 host2netname NEW: Secure RPC
2002 iconv_close NEW: iconv
2003 iconv_open NEW: iconv
2004 if_freenameindex NEW: IPv6
2005 if_indextoname NEW: IPv6
2006 if_nameindex NEW: IPv6
2007 if_nametoindex NEW: IPv6
2008 in6addr_any NEW: IPv6
2009 in6addr_loopback NEW: IPv6
2010 inet6_isipv4mapped NEW: IPv6
2011 isastream NEW: STREAMS
2012 iswblank NEW: GNU ext.
2013 key_decryptsession NEW: Secure RPC
2014 key_decryptsession_pk NEW: Secure RPC
2015 key_encryptsession NEW: Secure RPC
2016 key_encryptsession_pk NEW: Secure RPC
2017 key_gendes NEW: Secure RPC
2018 key_get_conv NEW: Secure RPC
2019 key_secretkey_is_set NEW: Secure RPC
2020 key_setnet NEW: Secure RPC
2021 key_setsecret NEW: Secure RPC
2022 llrint NEW: ISO C 9x
2023 llrintf NEW: ISO C 9x
2024 llrintl NEW: ISO C 9x
2025 llround NEW: ISO C 9x
2026 llroundf NEW: ISO C 9x
2027 llroundl NEW: ISO C 9x
2032 lrintf NEW: ISO C 9x
2033 lrintl NEW: ISO C 9x
2034 lround NEW: ISO C 9x
2035 lroundf NEW: ISO C 9x
2036 lroundl NEW: ISO C 9x
2038 makecontext NEW: Unix98
2039 mempcpy NEW: GNU ext.
2042 modify_ldt NEW: kernel
2046 nearbyint NEW: ISO C 9x
2047 nearbyintf NEW: ISO C 9x
2048 nearbyintl NEW: ISO C 9x
2049 netname2host NEW: Secure RPC
2050 netname2user NEW: Secure RPC
2051 nexttoward NEW: ISO C 9x
2052 nexttowardf NEW: ISO C 9x
2053 nexttowardl NEW: ISO C 9x
2057 passwd2des NEW: Secure RPC
2059 pow10f NEW: GNU ext.
2060 pow10l NEW: GNU ext.
2063 printf_size NEW: GNU ext.
2064 printf_size_info NEW: GNU ext.
2065 profil_counter REMOVED
2066 pthread_mutexattr_getkind_np REPLACED
2067 pthread_mutexattr_setkind_np REPLACED
2068 ptsname NEW: Unix98 PTY
2069 ptsname_r NEW: Unix98 PTY
2071 putchar_locked REMOVED
2072 putgrent NEW: GNU ext.
2074 putpmsg NEW: STREAMS
2075 pututxline NEW: Unix98
2079 readdir64_r NEW: LFS
2080 remquo NEW: ISO C 9x
2081 remquof NEW: ISO C 9x
2082 remquol NEW: ISO C 9x
2084 roundf NEW: ISO C 9x
2085 roundl NEW: ISO C 9x
2087 scalbln NEW: ISO C 9x
2088 scalblnf NEW: ISO C 9x
2089 scalblnl NEW: ISO C 9x
2091 sendfile NEW: kernel
2092 setcontext NEW: Unix98
2093 setrlimit64 NEW: LFS
2094 setutxent NEW: Unix98
2096 sigignore NEW: Unix98
2097 sigqueue NEW: POSIX.1b
2098 sigrelse NEW: Unix98
2099 sigset NEW: POSIX.1b
2100 sigtimedwait NEW: POSIX.1b
2101 sigwaitinfo NEW: POSIX.1b
2102 sincos NEW: GNU ext.
2103 sincosf NEW: GNU ext.
2104 sincosl NEW: GNU ext.
2108 strcasestr NEW: GNU ext.
2109 strtoimax NEW: ISO C 9x
2110 strtoumax NEW: ISO C 9x
2111 strverscmp NEW: GNU ext.
2112 svcauthdes_stats NEW: Secure RPC
2113 svcunix_create NEW: sunrpc etx
2114 svcunixfd_create NEW: sunrpc ext
2115 swapcontext NEW: Unix98
2116 tcgetsid NEW: Unix98 PTY
2117 tdestroy NEW: GNU ext.
2118 tgamma NEW: ISO C 9x
2119 tgammaf NEW: ISO C 9x
2120 tgammal NEW: ISO C 9x
2124 truncf NEW: ISO C 9x
2125 truncl NEW: ISO C 9x
2127 unlockpt NEW: Unix98 PTY
2128 updwtmpx NEW: Unix98
2129 user2netname NEW: Secure RPC
2130 utmpxname NEW: Unix98
2131 versionsort NEW: GNU ext.
2132 versionsort64 NEW: GNU ext.
2134 wcscasecmp NEW: GNU ext.
2135 wcsncasecmp NEW: GNU ext.
2136 wcsnlen NEW: GNU ext.
2137 wcstoimax NEW: ISO C 9x
2138 wcstoll NEW: ISO C 9x
2139 wcstoull NEW: ISO C 9x
2140 wcstoumax NEW: ISO C 9x
2142 wordexp NEW: POSIX.2
2143 wordfree NEW: POSIX.2
2144 write_profiling REMOVED
2145 xdecrypt NEW: Secure RPC
2146 xdr_authdes_cred NEW: Secure RPC
2147 xdr_authdes_verf NEW: Secure RPC
2148 xdr_cryptkeyarg NEW: Secure RPC
2149 xdr_cryptkeyarg2 NEW: Secure RPC
2150 xdr_cryptkeyres NEW: Secure RPC
2151 xdr_getcredres NEW: Secure RPC
2152 xdr_key_netstarg NEW: Secure RPC
2153 xdr_key_netstres NEW: Secure RPC
2154 xdr_keybuf NEW: Secure RPC
2155 xdr_keystatus NEW: Secure RPC
2156 xdr_netnamestr NEW: Secure RPC
2157 xdr_sizeof NEW: Secure RPC
2158 xdr_unixcred NEW: sunrpc ext
2159 xencrypt NEW: Secure RPC
2160 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2171 * inet_ntoa is thread-safe
2173 * updwtmp is moved from libutil to libc
2175 * rewrite of cbrt function
2177 * update of timezone data
2191 * add atoll function
2193 * fix complex problems in Berkeley DB code
2195 * fix math functions
2199 * fixed lots of header problems (especially Linux/GNU specific)
2201 * dynamic loader preserves all registers
2203 * Roland McGrath provided support for handling of auxiliary objects in
2204 the ELF dynamic loader.
2206 * support for parallel builds is improved
2210 * GNU extensions are no longer declared by default. To enable them you
2211 must define the macro `_GNU_SOURCE' in your program or compile with
2214 * The library has changed from using GNU ld symbol aliases to using weak
2215 symbols where available. The ELF object file format supports weak
2216 symbols; GNU ld also supports weak symbols in the a.out format. (There
2217 is also now support for other GNU ld extensions in ELF. Use the
2218 `--with-elf' option to configure to indicate you have ELF, and
2219 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2220 of many files which contained only symbol aliases, reducing the size of
2221 the source and the compiled library; many other files were renamed to
2222 less cryptic names previously occupied by the symbol alias files.
2223 There is a new header file <elf.h> for programs which operate on
2224 files in the ELF format.
2226 * Converted to Autoconf version 2, so `configure' has more options.
2227 Run `configure --help' to see the details.
2229 * The library can now be configured to build profiling, highly-optimized
2230 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2231 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2232 `configure' enable building these extra libraries. The shared library is
2233 built by default when using both ELF and GNU ld. When shared libraries
2234 are enabled, the new library `-ldl' is available for arbitrary run-time
2235 loading of shared objects; its interface is defined in <dlfcn.h>. The
2236 new header file <link.h> gives access to the internals of the run-time
2237 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2238 application of same name on other systems and it provides information
2239 about dynamically linked binaries.
2241 * The C library now provides the run-time support code for profiling
2242 executables compiled with `-pg'. Programs can control the profiling code
2243 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2244 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2245 the support for this file format was contributed by David Mosberger-Tang.
2247 * The math code has been replaced with a math library based on fdlibm from
2248 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2249 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2250 functions. The math functions now reside in a separate library, so
2251 programs using them will need to use `-lm' their linking commands.
2253 * John C. Bowman contributed optimized ix87 assembler inline functions.
2255 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2256 mechanism similar to that found in Solaris 2. This is now used for the
2257 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2258 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2259 file controls what services are used for each individual database. This
2260 works by loading shared libraries with names specified in `nsswitch.conf',
2261 so service modules can be changed or added at any time without even
2262 relinking any program. Currently there are the file, db, and NIS based
2263 NSS services available.
2265 * The new functions `strtoq' and `strtouq' parse integer values from
2266 strings, like `strtol' and `strtoul', but they return `long long int' and
2267 `unsigned long long int' values, respectively (64-bit quantities).
2269 * The new functions `strtof' and `strtold' parse floating-point values from
2270 strings, like `strtod', but they return `float' and `long double' values,
2271 respectively (on some machines `double' and `long double' are the same).
2273 * Ulrich Drepper has contributed new implementations of the floating-point
2274 printing and reading code used in the `printf' family of functions and
2275 `strtod', `strtof', and `strtold'. These new functions are perfectly
2276 accurate, and much faster than the old ones.
2278 * The implementation of the POSIX locale model was completely rewritten by
2279 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2280 to compile the POSIX locale definition.
2282 * The former dummy implementations of the strcoll and strxfrm function are
2283 now replaced by fully functional code contributed by Ulrich Drepper. The
2284 collation information comes from the POSIX locale definitions.
2286 * The new header <langinfo.h> defines an interface for accessing
2287 various locale-dependent data (using the locale chosen with `setlocale').
2289 * Ulrich Drepper has contributed a new suite of functions for operation on
2290 wide-character and multibyte-character strings, in <wchar.h>;
2291 and classification and case conversion of wide characters, in <wctype.h>.
2292 These new functions are conforming to the ISO C, Amendement 1 specification.
2294 * There is now a second implementation of the standard I/O library available.
2295 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2296 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2298 * You can now use positional parameter specifications in format strings
2299 for the `printf' and `scanf' families of functions. For example,
2300 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2301 ``Number 6, Mr Jones''. This is mainly useful when providing different
2302 format strings for different languages, whose grammars may dictate
2303 different orderings of the values being printed. To support this
2304 feature, the interface for `register_printf_handler' has changed; see
2305 the header file <printf.h> for details.
2307 * The `printf' and `scanf' families of functions now understand a new
2308 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2309 to group numbers as indicated by the locale; for `scanf' and friends, this
2310 says to accept as valid only a number with all the proper grouping
2311 separators in the right places. In the default "C" locale, numbers are
2312 not grouped; but locales for specific countries will define the usual
2313 conventions (i.e. separate thousands with `,' in the US locale).
2315 * The pgrp functions have been regularized, slightly incompatibly but much
2316 less confusingly. The core functions are now `getpgid' and `setpgid',
2317 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2318 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2319 provided for compatibility. There is no longer an incompatible `getpgrp'
2320 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2322 * The new header file <fts.h> and suite of functions simplify programs that
2323 operate on directory trees. This code comes from 4.4 BSD.
2325 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2326 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2327 NSS scheme used in glibc.
2329 * There is a new malloc debugging hook `__memalign_hook'.
2331 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2332 `unsigned int' in <sys/types.h>. These are for compatibility only and
2333 their use is discouraged.
2335 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2336 done differently, so that it works even without GNU ld.
2338 * New function `euidaccess' checks allowed access to a file like `access',
2339 but using the effective IDs instead of the real IDs.
2341 * The time zone data files have been updated for the latest and greatest
2342 local time conventions of the countries of the world.
2344 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2347 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2348 for formatting floating-point numbers. They are provided only for
2349 compatibility; new programs should use `sprintf' instead. There are
2350 also equivalent function for the `long double' floating-point type and
2351 all functions also exist in a reentrant form.
2353 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2354 functions for maintaining the login-record files (primarily of use to
2355 system programs such as `login'), and convenient functions for
2356 allocating and initializing a pseudo-terminal (pty) device.
2358 * Ulrich Drepper has contributed new support for System V style
2359 shared memory and IPC on systems that support it.
2361 * Ulrich Drepper has contributed several miscellaneous new functions found
2362 in System V: The `hsearch' family of functions provide an effective
2363 implementation of hash tables; `a64l' and `l64a' provide a very simple
2364 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2367 * Ulrich Drepper has contributed new reentrant counterparts for the
2368 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2370 * Ulrich Drepper has contributed new, highly-optimized versions of several
2371 string functions for the i486/Pentium family of processors.
2373 * Ulrich Drepper has updated the Linux-specific code, based largely
2374 on work done in Hongjiu Lu's version of GNU libc for Linux.
2375 The GNU library now supports Linux versions 2.0.10 and later,
2376 using the ELF object file format (i[3456]86-*-linux).
2378 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2380 * David Mosberger-Tang and Richard Henderson have ported the C library
2381 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2382 dynamic linking support for ELF/Alpha.
2384 * Richard Henderson contributed several Alpha optimized assembler function
2385 for arithmetic and string handling.
2387 * Ulrich Drepper has contributed a new set of message catalog functions to
2388 support multiple languages using the <libintl.h> interface, for use with
2389 his new package GNU gettext. Translation volunteers have contributed
2390 catalogs of the library's messages in Spanish, German, and Korean.
2392 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2393 program and the `catgets' function for reading the catalog files it
2394 creates. (The <libintl.h> interface is preferred; we include the
2395 <nl_types.h> interface using `catgets' only for source compatibility with
2396 programs already written to use it.)
2398 * New header file <values.h> gives SVID-compatible names for <limits.h>
2401 * Various new macros, declarations, and small header files for compatibility
2404 * New function `group_member' is a convenient way to check if a process has
2405 a given effective group ID.
2407 * When using GCC 2.7 and later, the socket functions are now declared in a
2408 special way so that passing an argument of type `struct sockaddr_in *',
2409 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2410 `struct sockaddr *' type, does not generate a type-clash warning.
2412 * New function `error' declared in header file <error.h> is a convenient
2413 function for printing error messages and optionally exiting; this is the
2414 canonical function used in GNU programs. The new functions `err', `warn',
2415 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2416 doing the same thing.
2418 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2419 POSIX.2 `glob' function to do ~ and {...} expansion.
2421 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2422 `clearenv' which is used in POSIX.9 is also available.
2424 * New function `getsid' returns session ID number on systems that support it.
2426 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2427 files <db.h> and <mpool.h> provide a rich set of functions for several
2428 types of simple databases stored in memory and in files, and <ndbm.h> is
2429 an old `ndbm'-compatible interface using the `db' functions. Link with
2430 `-ldb' to get these functions.
2432 * New macro `strdupa' copies a string like `strdup', but uses local stack
2433 space from `alloca' instead of dynamic heap space from `malloc'.
2435 * New function `strnlen' is like `strlen' but searches only a given maximum
2436 number of characters for the null terminator. `stpncpy', `strndup' and
2437 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2440 * New function `statfs' in header <sys/statfs.h>.
2442 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2443 provide convenient functions for operating on blocks of null-terminated
2446 * A new suite of functions in <utmp.h> handle all the details of reading
2447 and writing the utmp file.
2449 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2452 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2453 completely POSIX compliant and also implemented the extended functionality
2454 to handle alternate digit representation and alternate era date formats.
2456 * Ulrich Drepper provided an implementation of the `strptime' function
2457 defined in XPG4.2 which transforms a string into a `struct tm' value.
2459 * Paul Eggert provided the tzselect shell script as part of the timezone
2460 code. The shell script makes it easy to select the correct timezone
2463 * The implementation of the malloc family of functions is completely replaced
2464 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2465 The implementation uses the mmap function (if available) and it is
2466 optimized for the use in multi threaded programs.
2468 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2469 functions. This new functionality is usable by specifying a special
2470 salt string and it is compatible with implementation on *BSD systems.
2472 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2473 `getsubopt' to handle second level command line options, `bsd_signal'
2474 to access BSD style `signal' functionality, the obsolete `regexp' style
2477 * the `lchown' function is available on system which support this
2480 * The implementation of the shadow password handling function was contributed
2483 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2485 * POSIX.1g support was added. The <sys/select.h> header is available,
2486 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2487 implementation of `getaddrinfo'.
2491 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2493 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2494 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2496 * The new function `daemon' from 4.4 BSD is useful for server programs that
2497 want to put themselves in the background.
2499 * Joel Sherrill has contributed support for several standalone boards that
2500 run without an operating system.
2502 * `printf', `scanf' and friends now accept a `q' type modifier for long
2503 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2505 * All of the code taken from BSD (notably most of the math and networking
2506 routines) has been updated from the BSD 4.4-Lite release.
2508 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2510 * The new functions `getdomainname' and `setdomainname' fetch or change the
2511 YP/NIS domain name. These are system calls which exist on systems which
2514 * The time zone data files have been updated for the latest international
2517 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2518 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2522 * The C library now includes support for Sun RPC, from Sun's free
2523 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2524 are included. (There is still no support for YP.)
2526 * Tom Quinn has contributed a port of the C library to SGI machines running
2527 Irix 4 (mips-sgi-irix4).
2529 * The new `lockf' function is a simplified interface to the locking
2530 facilities of `fcntl', included for compatibility.
2532 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2534 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2536 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2539 * The error message printed by `assert' for a failed assertion now includes
2540 the name of the program (if using GNU ld) and the name of the calling
2541 function (with versions of GCC that support this).
2543 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2545 * The library now includes the <sys/mman.h> header file and memory
2546 management functions `mmap', `munmap', `mprotect', `msync', and
2547 `madvise', on systems that support those facilities.
2549 * The interface for `mcheck' has changed slightly: the function called to
2550 abort the program when an allocation inconsistency is detected now takes
2551 an argument that indicates the type of failure. The new function
2552 `mprobe' lets you request a consistency check for a particular block at
2553 any time (checks are normally done only when you call `free' or `realloc'
2556 * It is now possible to easily cross-compile the C library, building on one
2557 system a library to run on another machine and/or operating system. All
2558 you need to do is set the variable `HOST_CC' in `configparms' to the
2559 native compiler for programs to run on the machine you are building on (a
2560 few generator programs are used on Unix systems); set `CC' to the
2563 * The new function `fexecve' (only implemented on the GNU system) executes
2564 a program file given a file descriptor already open on the file.
2568 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2569 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2571 * You can set the variable `libprefix' in `configparms' to specify a prefix
2572 to be prepended to installed library files; this makes it easy to install
2573 the GNU C library to be linked as `-lgnuc' or whatever.
2575 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2576 copies a limited number of characters from a string, and returns the
2577 address of the last character written.
2579 * You no longer need to check for whether the installed `stddef.h' is
2580 compatible with the GNU C library. configure now checks for you.
2582 * You can now define a per-stream `fileno' function to convert the
2583 stream's cookie into an integral file descriptor.
2585 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2586 allocates zero bytes of storage, and returns a unique pointer which
2587 you can pass to `realloc' or `free'. The behavior is undefined if
2588 you dereference this pointer.
2590 * The C library now runs on Sony NEWS m68k machines running either
2591 NewsOS 3 or NewsOS 4.
2593 * The new `syscall' function is a system-dependent primitive function
2594 for invoking system calls. It has the canonical behavior on Unix
2595 systems, including unreliable return values for some calls (such as
2596 `pipe', `fork' and `getppid').
2598 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2599 to `EAGAIN', which is the preferred name. On systems whose kernels
2600 use two distinct codes, the C library now translates EWOULDBLOCK to
2601 EAGAIN in every system call function.
2605 * The GNU C Library Reference Manual is now distributed with the library.
2606 `make dvi' will produce a DVI file of the printed manual.
2607 `make info' will produce Info files that you can read on line using C-h i
2608 in Emacs or the `info' program.
2609 Please send comments on the manual to bug-glibc-manual@gnu.org.
2611 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2613 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2615 * Jason Merrill has contributed a port to the Sequent Symmetry running
2616 Dynix version 3 (i386-sequent-dynix).
2618 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2619 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2621 * New function `memory_warnings' lets you arrange to get warnings when
2622 malloc is running out of memory to allocate, like Emacs gives you.
2624 * The C library now contains the relocating allocator used in Emacs 19 for
2625 its editing buffers. This allocator (ralloc) minimizes allocation
2626 overhead and fragmentation by moving allocated regions around whenever it
2627 needs to. You always refer to a ralloc'd region with a "handle" (a
2628 pointer to a pointer--an object of type `void **').
2630 * There is a new `printf' format: `%m' gives you the string corresponding
2631 to the error code in `errno'.
2633 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2634 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2635 pass, the `a' modifier says to fill in a `char **' you pass with a
2638 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2639 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2640 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2642 * `mkstemp' is a traditional Unix function to atomically create and open a
2643 uniquely-named temporary file.
2647 * The standard location for the file that says what the local timezone is
2648 has changed again. It is now `/usr/local/etc/localtime' (or more
2649 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2651 * The distribution no longer contains any files with names longer than 14
2654 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2655 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2657 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2661 * The configuration process has changed quite a bit. The `configure'
2662 script is now used just like the configuration scripts for other GNU
2663 packages. The `sysdeps' directory hierarchy is much rearranged.
2664 The file `INSTALL' explains the new scheme in detail.
2666 * The header files no longer need to be processed into ANSI C and
2667 traditional C versions. There is just one set of files to install, and
2668 it will work with ANSI or old C compilers (including `gcc -traditional').
2670 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2671 MIPS DECStation running Ultrix 4.
2673 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2674 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2675 made itself into a shared library.
2677 * Yet further improved support for the i386, running 4.3 BSD-like systems
2678 (such as Mach 3 with the Unix single-server), or System V.
2680 * New function `strncasecmp' to do case-insensitive string comparison
2681 with limited length.
2683 * New function `strsep' is a reentrant alternative to `strtok'.
2685 * New functions `scandir' and `alphasort' for searching directories.
2687 * New function `setenv' is a better interface to `putenv'.
2689 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2690 function for traversing a directory tree.
2692 * The GNU obstack package is now also part of the C library.
2693 The new function `open_obstack_stream' creates a stdio stream that
2694 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2695 formatted output directly to an obstack.
2697 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2698 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2700 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2702 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2703 things to your strings.
2705 * There are some new test programs: test-fseek, testmb, and testrand.
2707 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2708 These ports are not finished, but are a good starting place for really
2709 supporting those systems.
2711 * `/etc/localtime' is now the standard location for the file that says what
2712 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2713 This follows the general principle that `/etc' is the place for all local
2714 configuration files.
2716 * The C library header files now use `extern "C"' when used by the C++
2717 compiler, so the C library should now work with C++ code.
2719 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2720 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2723 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2724 function which uses the `merge sort' algorithm, and is said to be
2725 significantly faster than the old GNU `qsort' function. Merge sort is
2726 now the standard `qsort' function. The new algorithm can require a lot
2727 of temporary storage; so, the old sorting function is called when the
2728 required storage is not available.
2730 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2731 provides the Unix `crypt' function, plus some other entry points.
2733 * The code and header files taken from 4.4 BSD have been updated with the
2734 latest files released from Berkeley.
2736 ----------------------------------------------------------------------
2737 Copyright information:
2739 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2741 Permission is granted to anyone to make or distribute verbatim copies
2742 of this document as received, in any medium, provided that the
2743 copyright notice and this permission notice are preserved,
2744 thus giving the recipient permission to redistribute in turn.
2746 Permission is granted to distribute modified versions
2747 of this document, or of portions of it,
2748 under the above conditions, provided also that they
2749 carry prominent notices stating who last changed them.
2752 version-control: never