1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 16517, 16519, 16734, 17905, 18086, 18265, 18480, 18525, 18618, 18647,
13 18661, 18674, 18778, 18781, 18787, 18789, 18790.
18 * The following bugs are resolved with this release:
20 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
21 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
22 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
23 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
24 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
25 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
26 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
27 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
28 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
29 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
30 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
31 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
32 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
33 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
34 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
35 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
36 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
37 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
38 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
39 18657, 18676, 18694, 18696.
41 * Cache information can be queried via sysconf() function on s390 e.g. with
42 _SC_LEVEL1_ICACHE_SIZE as argument.
44 * A buffer overflow in gethostbyname_r and related functions performing DNS
45 requests has been fixed. If the NSS functions were called with a
46 misaligned buffer, the buffer length change due to pointer alignment was
47 not taken into account. This could result in application crashes or,
48 potentially arbitrary code execution, using crafted, but syntactically
49 valid DNS responses. (CVE-2015-1781)
51 * The time zone file parser has been made more robust against crafted time
52 zone files, avoiding heap buffer overflows related to the processing of
53 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
54 large time zone data files. Overly long time zone specifiers in the TZ
55 variable no longer result in stack overflows and crashes.
57 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
58 for LD and GD on x86 and x86-64, has been implemented. You will need
59 binutils-2.24 or later to enable this optimization.
61 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
62 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
63 Hat). These updates cause user visible changes, such as the fix for bug
66 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
67 and getXXbyYY NSS calls for the same database, causing a denial-of-service
68 condition in some applications.
70 * Added vector math library named libmvec with the following vectorized x86_64
71 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
73 The library can be disabled with --disable-mathvec. Use of the functions is
74 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
75 Shared library libmvec.so is linked in as needed when using -lm (no need to
76 specify -lmvec explicitly for not static builds).
77 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
79 * A new fmemopen implementation has been added with the goal of POSIX
80 compliance. The new implementation fixes the following long-standing
81 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
82 old implementation is still present for use be by existing binaries.
84 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
85 releases. It has been fixed to match 2.19 and older, but binaries built
86 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
88 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
89 Contributed by Roland McGrath (Google).
91 * The header <regexp.h> is deprecated, and will be removed in a future
92 release. Use of this header will trigger a deprecation warning.
93 Application developers should update their code to use <regex.h> instead.
95 This header was formerly part of SUS, but was deprecated in 1994 and
96 removed from the standard in 2001. Also, the glibc implementation
97 leaks memory. See BZ#18681 for more details.
101 * The following bugs are resolved with this release:
103 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
104 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
105 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
106 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
107 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
108 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
109 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
110 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
111 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
112 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
115 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
116 too little memory for the to-be-scanned arguments and overflow the
117 allocated buffer. The implementation now correctly computes the required
118 buffer size when using malloc, and switches to malloc from alloca as
121 * A new semaphore algorithm has been implemented in generic C code for all
122 machines. Previous custom assembly implementations of semaphore were
123 difficult to reason about or ensure that they were safe. The new version
124 of semaphore supports machines with 64-bit or 32-bit atomic operations.
125 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
126 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
128 * Port to Altera Nios II has been contributed by Mentor Graphics.
130 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
131 implementations for powerpc64/powerpc64le.
132 Implemented by Adhemerval Zanella (IBM).
134 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
135 and powerpc64le. This may improve lock scaling of existing programs on
136 HTM capable systems. The lock elision code is only enabled with
137 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
138 powerpc will issue a transaction abort on every syscall to avoid side
139 effects being visible outside transactions.
141 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
142 AArch64. Contributed by ARM Ltd.
144 * i386 memcpy functions optimized with SSE2 unaligned load/store.
146 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
147 under certain input conditions resulting in the execution of a shell for
148 command substitution when the application did not request it. The
149 implementation now checks WRDE_NOCMD immediately before executing the
150 shell and returns the error WRDE_CMDSUB as expected.
152 * CVE-2012-3406 printf-style functions could run into a stack overflow when
153 processing format strings with a large number of format specifiers.
155 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
156 infinite loop if the DNS response contained a PTR record of an unexpected
159 * The minimum GCC version that can be used to build this version of the GNU
160 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
161 still be used to compile programs using the GNU C Library.
163 * The GNU C Library is now built with -Werror by default. This can be
164 disabled by configuring with --disable-werror.
166 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
168 * The obsolete sigvec function has been removed. This was the original
169 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
170 programs have been using instead for about 25 years. Of course, ABI
171 compatibility for old binaries using sigvec remains intact.
173 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
174 with newer versions of bison.
176 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
177 The original MIPS o32 hard-float ABI requires an FPU where double-precision
178 registers overlay two consecutive single-precision registers. MIPS32R2
179 introduced a new FPU mode (FR=1) where double-precision registers extend the
180 corresponding single-precision registers which is incompatible with the
181 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
182 require the use of FR=1 making a transition necessary. New o32 ABI
183 extensions enable users to migrate over time from the original o32 ABI
184 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
185 tracks the ABI of any loaded object and verifies that new objects are
186 compatible. Mode transitions will also be requested as required and
187 unsupportable objects will be rejected. The ABI checks include both soft and
188 hard float ABIs for o32, n32 and n64.
190 GCC 5 with GNU binutils 2.25 onwards:
191 It is strongly recommended that all o32 system libraries are built using the
192 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
193 with the original and all new o32 ABI extensions. Configure a MIPS GCC
194 compiler using --with-fp-32=xx to set this by default.
198 * The following bugs are resolved with this release:
200 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
201 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
202 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
203 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
204 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
205 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
206 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
207 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
208 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
209 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
210 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
211 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
212 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
213 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
214 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
216 * Reverted change of ABI data structures for s390 and s390x:
217 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
218 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
219 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
220 are preserved pointing straight to the same implementation as the old ones.
221 Given that, new callers will simply provide a too-big buffer to these
222 functions. Any applications/libraries out there that embed jmp_buf or
223 ucontext_t in an ABI-relevant data structure that have already been rebuilt
224 against 2.19 headers will have to rebuilt again. This is necessary in any
225 case to revert the breakage in their ABI caused by the glibc change.
227 * Support for file description locks is added to systems running the
228 Linux kernel. The standard file locking interfaces are extended to
229 operate on file descriptions, not file descriptors, via the use of
230 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
231 are associated with an open file instead of a process.
233 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
235 * The minimum Linux kernel version that this version of the GNU C Library
236 can be used with is 2.6.32.
238 * Running the testsuite no longer terminates as soon as a test fails.
239 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
240 with PASS or FAIL lines for individual tests. A summary of the results is
241 printed, including a list of failing lists, and "make check" exits with
242 error status if there were any unexpected failures. "make check
243 stop-on-test-failure=y" may be used to keep the old behavior.
245 * The am33 port, which had not worked for several years, has been removed
248 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
249 supported; they now act the same as _DEFAULT_SOURCE (but generate a
250 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
251 conflicted with POSIX (support for which was removed in 2.19), the
252 interfaces those macros enabled remain available when compiling with
253 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
256 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
258 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
259 This may improve lock scaling of existing programs on TX capable systems.
260 The lock elision code is only built with --enable-lock-elision=yes and
261 then requires a GCC version supporting the TX builtins. With lock elision
262 default mutexes are elided via __builtin_tbegin, if the cpu supports
263 transactions. By default lock elision is not enabled and the elision code
266 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
267 copy the path argument. This allowed programs to cause posix_spawn to
268 deference a dangling pointer, or use an unexpected pathname argument if
269 the string was modified after the posix_spawn_file_actions_addopen
272 * All supported architectures now use the main glibc sysdeps directory
273 instead of some being in a separate "ports" directory (which was
274 distributed separately before glibc 2.17).
276 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
277 On configurations that support it (all Linux configurations), it's now
278 used regardless of the --enable-add-ons switch to configure. It is no
279 longer possible to build such configurations without pthreads support.
281 * Locale names, including those obtained from environment variables (LANG
282 and the LC_* variables), are more tightly checked for proper syntax.
283 setlocale will now fail (with EINVAL) for locale names that are overly
284 long, contain slashes without starting with a slash, or contain ".." path
285 components. (CVE-2014-0475) Previously, some valid locale names were
286 silently replaced with the "C" locale when running in AT_SECURE mode
287 (e.g., in a SUID program). This is no longer necessary because of the
290 * On x86-64, the dynamic linker's lazy-binding support is now compatible
291 with application code using Intel MPX instructions. (With all previous
292 versions, the MPX register state could be clobbered when making calls
293 into or out of a shared library.) Note that while the new dynamic
294 linker is compatible with all known x86 hardware whether or not it
295 supports Intel MPX, some x86 instruction-set emulators might fail to
296 handle the new instruction encodings. This is known to affect Valgrind
297 versions up through 3.9 (but will be fixed in the forthcoming 3.10
298 release), and might affect other tools that do instruction emulation.
300 * Support for loadable gconv transliteration modules has been removed.
301 The support for transliteration modules has been non-functional for
302 over a decade, and the removal is prompted by security defects. The
303 normal gconv conversion modules are still supported. Transliteration
304 with //TRANSLIT is still possible, and the //IGNORE specifier
305 continues to be supported. (CVE-2014-5119)
307 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
308 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
309 resulting a denial-of-service security vulnerability in applications which
310 use functions related to iconv. (CVE-2014-6040)
314 * The following bugs are resolved with this release:
316 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
317 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
318 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
319 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
320 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
321 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
322 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
323 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
324 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
325 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
326 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
327 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
328 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
329 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
330 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
331 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
332 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
333 16431, 16453, 16474, 16506, 16510, 16529
335 * Slovenian translations for glibc messages have been contributed by the
336 Translation Project's Slovenian team of translators.
338 * The public headers no longer use __unused nor __block. This change is to
339 support compiling programs that are derived from BSD sources and use
340 __unused internally, and to support compiling with Clang's -fblock
341 extension which uses __block.
343 * CVE-2012-4412 The strcoll implementation caches indices and rules for
344 large collation sequences to optimize multiple passes. This cache
345 computation may overflow for large collation sequences and may cause a
346 stack or buffer overflow. This is now fixed to use a slower algorithm
347 which does not use a cache if there is an integer overflow.
349 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
350 rules for large collation sequences to optimize multiple passes and falls
351 back to alloca if malloc fails, resulting in a possible stack overflow.
352 The implementation now falls back to an uncached collation sequence lookup
355 * CVE-2013-4788 The pointer guard used for pointer mangling was not
356 initialized for static applications resulting in the security feature
357 being disabled. The pointer guard is now correctly initialized to a
358 random value for static applications. Existing static applications need
359 to be recompiled to take advantage of the fix (bug 15754).
361 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
362 to the d_name member of struct dirent, or omit the terminating NUL
363 character. (Bugzilla #14699).
365 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
366 aligned_alloc functions could allocate too few bytes or corrupt the
367 heap when passed very large allocation size values (Bugzilla #15855,
370 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
371 for AF_INET6 has been fixed (Bugzilla #16072).
373 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
374 pap_CW, quz_PE, the_NP.
376 * Substantially revised locales: gd_GB, ht_HT
378 * The LC_ADDRESS field was updated to support country_car for almost all
381 * ISO 1427 definitions were updated.
383 * ISO 3166 definitions were updated.
385 * The localedef utility now supports --big-endian and --little-endian
386 command-line options to generate locales for a different system from that
387 for which the C library was built.
389 * Binary locale files now only depend on the endianness of the system for
390 which they are generated and not on other properties of that system. As a
391 consequence, binary files generated with new localedef may be incompatible
392 with old versions of the GNU C Library, and binary files generated with
393 old localedef may be incompatible with this version of the GNU C Library,
394 in the following circumstances:
396 + Locale files may be incompatible on m68k systems.
398 + Locale archive files (but not separate files for individual locales) may
399 be incompatible on systems where plain "char" is signed.
401 * The configure option --disable-versioning has been removed. Builds with
402 --disable-versioning had not worked for several years.
404 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
405 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
407 * SystemTap probes for malloc have been introduced.
409 * SystemTap probes for slow multiple precision fallback paths of
410 transcendental functions have been introduced.
412 * Support for powerpc64le has been added.
414 * The soft-float powerpc port now supports e500 processors.
416 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
418 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
419 set of header declarations that are enabled by default, even when other
420 feature test macros or compiler options such as -std=c99 would otherwise
421 disable some of those declarations.
423 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
424 conflict with POSIX. The libbsd-compat library (which was a dummy library
425 that did nothing) has also been removed.
427 * Preliminary documentation about Multi-Thread, Async-Signal and
428 Async-Cancel Safety has been added.
430 * Change of ABI data structures for s390 and s390x:
431 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
432 allow for future hardware extensions. All library functions that accept or
433 return these structures were versioned in order to provide backwards
434 compatibility with existing code. However, not all cases can be handled
435 with interface versioning. If an application embeds either structure into
436 another structure and that structure is passed to another compilation unit
437 which expects the newer larger-sized object then any access to the new
438 fields will result in undefined behaviour. Similarly any access to fields
439 that were moved by the enlarging of the structures will cause undefined
440 behaviour. To fix the undefined behaviour all objects that are part of the
441 final in-memory image must agree on the size of structures, and this may
442 require recompilation.
446 * The following bugs are resolved with this release:
448 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
449 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
450 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
451 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
452 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
453 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
454 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
455 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
456 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
457 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
458 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
459 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
460 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
463 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
464 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
465 Distributions can re-enable building and using pt_chown via the new configure
466 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
467 considerable security risks and should only be used if the distribution
468 understands and accepts the risks.
470 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
473 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
474 fixed (Bugzilla #15330).
476 * Add support for calling C++11 thread_local object destructors on thread
477 and program exit. This needs compiler support for offloading C++11
478 destructor calls to glibc.
480 * Improved worst case performance of libm functions with double inputs and
483 * Support for priority inherited mutexes in pthread condition variables on
484 non-x86 architectures.
486 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
488 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
490 * Optimized string functions for ARM. Implemented by Will Newton and
493 * Optimized libm functions for SPARC. Implemented by David S. Miller.
495 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
498 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
499 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
501 * Added a benchmark framework to track performance of functions in glibc.
503 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
504 It is based on draft TS 18661 and currently enabled as a GNU extension.
506 * On Linux, the clock function now uses the clock_gettime system call
507 for improved precision, rather than old times system call.
509 * Added support for version-3 tz format files. This is needed when using
510 the tz database release 2013e or later, and affects a few unusual cases --
511 currently only TZ='America/Godthab' for time stamps after 2037.
513 * Added new API functions pthread_getattr_default_np and
514 pthread_setattr_default_np to get and set the default pthread
515 attributes of a process.
517 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
518 This may improve lock scaling of existing programs on TSX capable systems.
519 When the --enable-lock-elision=yes parameter is specified at configure
520 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
523 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
524 availability). Implemented by Ryan S. Arnold.
526 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
530 * The following bugs are resolved with this release:
532 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
533 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
534 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
535 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
536 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
537 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
538 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
539 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
540 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
541 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
542 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
543 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
544 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
545 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
546 14879, 14889, 14893, 14898, 14914.
548 * Optimization of memcpy for MIPS.
550 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
551 EMFILE has been fixed (Bugzilla #14889).
553 * The add-on ports collection is now distributed in the "ports" subdirectory
554 of the main GNU C Library distribution, rather than separately.
556 * Port to ARM AArch64 contributed by Linaro.
558 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
559 Optimized versions of memcpy, memset, and memcmp added for System z10 and
561 Implemented by Andreas Krebbel.
563 * The new function secure_getenv allows secure access to the environment,
564 returning NULL if running in a SUID/SGID process. This function replaces
565 the internal function __secure_getenv.
567 * SystemTap static probes have been added into the dynamic linker.
568 Implemented by Gary Benson.
570 * Optimizations of string functions strstr, strcasestr and memmem.
571 Implemented by Maxim Kuvyrkov.
573 * The minimum Linux kernel version that this version of the GNU C Library
574 can be used with is 2.6.16.
576 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
577 powerpc POWER7. Implemented by Will Schmidt.
579 * New configure option --disable-nscd builds the C library such that it
580 never attempts to contact the Name Service Caching Daemon (nscd).
581 New configure option --disable-build-nscd avoids building nscd itself;
582 this is the default if --disable-nscd is used.
584 * Improved support for cross-compilation, including cross-testing and
585 bootstrap builds without a previously built glibc.
587 * Several testsuite tests are now able to test multiple IFUNC variants of an
588 interface, rather than just testing the one that would be chooen by
591 * New configure options --with-bugurl and --with-pkgversion, for
592 distributors to use to embed their bug-reporting and package version
593 information in --help and --version output.
595 * The ttyname and ttyname_r functions on Linux now fall back to searching for
596 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
597 allows creation of chroots without the procfs mounted on /proc.
599 * The `crypt' function now fails if passed salt bytes that violate the
600 specification for those values. On Linux, the `crypt' function will
601 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
602 enabled, and fail on encrypted strings using the MD5 or DES algorithm
603 when the mode is enabled.
605 * The `clock_*' suite of functions (declared in <time.h>) is now available
606 directly in the main C library. Previously it was necessary to link with
607 -lrt to use these functions. This change has the effect that a
608 single-threaded program that uses a function such as `clock_gettime' (and
609 is not linked with -lrt) will no longer implicitly load the pthreads
610 library at runtime and so will not suffer the overheads associated with
611 multi-thread support in other code such as the C++ runtime library.
613 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
618 * The following bugs are resolved with this release:
620 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
621 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
622 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
623 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
624 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
625 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
626 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
627 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
628 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
629 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
630 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
631 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
632 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
633 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
634 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
635 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
636 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
637 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
638 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
639 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
640 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
641 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
644 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
645 configuring glibc with:
646 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
647 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
648 Implemented by H.J. Lu.
652 + define static_assert
654 + do not declare gets
656 + declare at_quick_exit and quick_exit also for ISO C11
658 + aligned_alloc. NB: The code is deliberately allows the size parameter
659 to not be a multiple of the alignment. This is a moronic requirement
660 in the standard but it is only a requirement on the caller, not the
665 + uchar.h support added
667 + CMPLX, CMPLXF, CMPLXL added
669 Implemented by Ulrich Drepper.
671 * Support for the IA-64 has been moved to ports.
673 * Remove support for anything but ELF binary format
675 * Checking versions of poll, ppoll added.
676 Implemented by Ulrich Drepper.
678 * More generic and 64-bit performance optimizations to math functions.
679 Implemented by Ulrich Drepper.
681 * New configure option --enable-obsolete-rpc makes the deprecated RPC
682 headers and functions available at compile time as they were before
683 version 2.14. This option will be removed at some time in the future
684 after the TI-RPC library becomes fully sufficient for the needs of
685 existing applications.
687 * Compatibility code for Linux kernel versions before 2.4 has been removed.
688 Note that glibc is not expected to work with any Linux kernel version
691 * New header <sys/auxv.h> and function getauxval allowing easy access to
692 the AT_* key-value pairs passed from the Linux kernel. The header also
693 defines the HWCAP_* bits associated with the AT_HWCAP key.
695 * New locales: mag_IN
697 * New configure option --enable-systemtap builds SystemTap static probes
698 into libc for setjmp and longjmp and into libpthread for various operations.
699 So far the setjmp/longjmp probes and some of the libpthread probes are
700 provided only for i*86 and x86_64.
701 Implemented by Roland McGrath and Rayson Ho.
703 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
705 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
708 * More optimized functions for SPARC. Implemented by David S. Miller.
710 * Improved support for cross-compilation, especially bootstrap builds
711 without a previously built glibc.
713 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
714 Chris Metcalf from Tilera.
716 * Support for the old ARM ABI has been removed from ports. Only the EABI is
717 now supported for ARM processors.
719 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
720 as the name of the dynamic linker, to distinguish it from the
721 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
723 * Support for CRIS has been removed from ports.
725 * A new class of installed header has been documented for low-level
726 platform-specific functionality. PowerPC added the first instance with a
727 function to provide time base register access. Contributed by Tulio
728 Magno Quites Machado Filho.
730 * ix86 configurations now install header files that are consistent with
731 what x86-64 configurations install. These same header files can be used
732 for -m32, -m64, or -mx32 builds.
733 Contributed by H.J. Lu.
735 * Math library bug fixes. A thorough audit of all open math library bugs was
736 conducted by Joseph Myers. Significant progress was made on many math
737 library bugs resulting in more accurate exceptions and function results.
738 Many thanks to all those that contributed including Andreas Jaeger for his
739 patch review and work on the x87 trigonometric instruction issues.
741 * Timezone data is no longer installed. Timezone-related binaries and scripts
742 will continue to be installed. Users should obtain their timezone data from
743 their distribution provider or from the tzdata package at
744 <ftp://munnari.oz.au/pub/>.
748 * The following bugs are resolved with this release:
750 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
751 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
752 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
753 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
754 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
755 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
756 13484, 13506, 13515, 13523, 13524, 13538, 13540
758 * New program pldd to list loaded object of a process
759 Implemented by Ulrich Drepper.
761 * Add nss_db support back to glibc. No more dependency on Berkeley db
762 and support for initgroups lookups.
763 Implemented by Ulrich Drepper.
765 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
766 Contributed by HJ Lu.
768 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
769 Contributed by HJ Lu.
771 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
772 on x86-32 and x86-64.
773 Contributed by Liubov Dmitrieva.
775 * Optimized strchr and strrchr for SSE on x86-32.
776 Contributed by Liubov Dmitrieva.
778 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
779 for x86-64 and x86-32.
780 Contributed by Liubov Dmitrieva.
782 * New interfaces: scandirat, scandirat64
783 Implemented by Ulrich Drepper.
785 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
786 Implemented by Ulrich Drepper.
788 * nscd now also caches the netgroup database.
789 Implemented by Ulrich Drepper.
791 * Integrate libm with gcc's -ffinite-math-only option.
792 Implemented by Ulrich Drepper.
794 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
795 to math functions. Implemented by Ulrich Drepper.
797 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
798 Implemented by Ulrich Drepper.
800 * New Linux interfaces: process_vm_readv, process_vm_writev
802 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
803 Implemented by Ulrich Drepper.
805 * Optimized nearbyint and strcasecmp for PPC.
806 Implemented by Adhemerval Zanella.
808 * New locales: bho_IN, unm_US, es_CU, ta_LK
812 * The following bugs are resolved with this release:
814 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
815 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
816 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
817 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
818 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
819 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
820 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
821 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
822 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
823 12795, 12811, 12813, 12814, 12841
825 * The RPC implementation in libc is obsoleted. Old programs keep working
826 but new programs cannot be linked with the routines in libc anymore.
827 Programs in need of RPC functionality must be linked against TI-RPC.
828 The TI-RPC implementation is IPv6 enabled and there are other benefits.
830 Visible changes of this change include (obviously) the inability to link
831 programs using RPC functions without referencing the TI-RPC library and the
832 removal of the RPC headers from the glibc headers.
833 Implemented by Ulrich Drepper.
835 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
836 syncfs, setns, sendmmsg
838 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
839 yue_HK, lij_IT, mhr_RU
841 * New encodings: CP770, CP771, CP772, CP773, CP774
843 * New program sotruss to trace calls through PLTs
844 Implemented by Ulrich Drepper.
846 * The malloc hook implementation is marked deprecated and will be removed
847 from the default implementation in the next version. The design never
848 worked ever since the introduction of threads. Even programs which do
849 not create threads themselves can use multiple threads created internally.
853 * The following bugs are resolved with this release:
855 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
856 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
857 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
858 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
861 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
863 * POWER7 optimizations: memset, memcmp, strncmp
865 * New optimized string functions for x86-64: strnlen (SSE2),
866 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
867 Implemented by Ulrich Drepper.
871 * The following bugs are resolved with this release:
873 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
874 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
875 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
876 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
877 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
878 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
879 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
880 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
882 * New interfaces: pthread_getname_np, pthread_setname_np
884 * New Linux interface: recvmmsg
886 * STT_GNU_IFUNC implemented for Sparc by David Miller.
888 * The dynamic linker now recognizes supported ABI versions from the
889 EI_ABIVERSION field in the ELF header.
890 Implemented by Ulrich Drepper.
892 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
893 will not be used to fill in password fields in the passwd.byname replies.
894 Instead it is used to synthesize the shadow.byname table, should it be
895 missing. This is a useful mode in some installations involving Solaris.
896 Implemented by Ulrich Drepper.
898 * New locales: kok_IN, sq_MK, cv_RU
902 * The following bugs are resolved with this release:
904 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
905 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
906 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
907 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
908 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
909 10789, 10817, 10823, 10840, 10847
911 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
913 Implemented by Ulrich Drepper.
915 * Checking version of longjmp added that fails if an uninitialized stack
916 frame would be created. Implemented by Ulrich Drepper.
918 * STT_GNU_IFUNC is now supported in static executables.
919 Implemented by H.J. Lu.
921 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
923 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
924 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
925 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
926 Contributed by H.J. Lu.
928 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
929 Implemented by Ulrich Drepper.
931 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
933 Contributed by H.J. Lu.
935 * Support for fma instruction in AVX on x86-64.
936 Implemented by H.J. Lu and Ulrich Drepper.
938 * AVX support in x86-64 auditing support in ld.so.
939 Implemented by H.J. Lu.
941 * STB_GNU_UNIQUE support added.
942 Implemented by Ulrich Drepper.
944 * Implement second fallback mode for optimized DNS lookup for even more
945 broken environments. If two requests from the same port are not
946 handled correctly close the socket and open a new one before sending
947 the second request. The 'single-request-reopen' option in /etc/resolv.conf
948 can be used to select this mode right away, instead of rediscovering the
949 necessity is every process again.
950 Implemented by Ulrich Drepper.
952 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
953 Implemented by Adam Tkac.
955 * Optimized iconv conversions for S390x.
956 Implemented by Andreas Krebbel.
958 * Using condvars with PI mutexes is now more efficient due to kernel
959 support for requeueing to PI futexes. NPTL support added for x86-64.
960 Implemented by Ulrich Drepper.
962 * New locales: ps_AF, my_MM
966 * The following bugs are resolved with this release:
968 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
969 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
970 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
971 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
972 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
974 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
975 Implemented by Ulrich Drepper.
977 * New Linux interfaces: accept4, fallocate, fallocate64.
978 Implemented by Ulrich Drepper.
980 * Correct declarations of string function when used in C++ code. This
981 could lead to compile errors for invalid C++ code.
983 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
986 * New POSIX 2008 interface: psiginfo
987 Implemented by Ulrich Drepper.
989 * New ISO C++1x interfaces: quick_exit, at_quick_exit
990 Implemented by Ulrich Drepper.
992 * Support for selecting between multiple function definitions at runtime
993 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
995 * The libcrypt library can now use the hash function implementations in
996 NSS. Implemented by Ulrich Drepper.
998 * The malloc implementation can be compiled to be less memory efficient
999 but higher performing in multi-threaded programs.
1000 Implemented by Ulrich Drepper.
1002 * New locales: nan_TW@latin, ks_IN
1004 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1005 Implemented by Ulrich Drepper.
1007 * Extended printf hook support. It is possible to use user-defined types
1008 and extend existing format specifiers.
1009 Implemented by Ulrich Drepper.
1011 * Handling for group shadow files has been added.
1012 Implemented by Ulrich Drepper.
1014 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1015 servers (the case, e.g., for some people using the built-in DNS
1016 server in ADSL modems/routers). There is a once-per-process timeout
1017 in case of a broken server. To avoid it, users can run nscd or put
1018 'options single-request' in /etc/resolv.conf.
1019 Implemented by Ulrich Drepper.
1023 * The following bugs are resolved with this release:
1025 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1026 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1027 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1028 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1029 6968, 6974, 6980, 6995, 7008, 7009, 7029
1031 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1032 up at the same time. Implemented by Ulrich Drepper.
1034 * TLS descriptors for LD and GD on x86 and x86-64.
1035 Implemented by Alexandre Oliva.
1037 * getaddrinfo now handles DCCP and UDPlite.
1038 Implemented by Ulrich Drepper.
1040 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1041 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1042 Implemented by Ulrich Drepper.
1044 * New implementation of memmem, strstr, and strcasestr which is O(n).
1045 Implemented by Eric Blake.
1047 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1049 * Implement "e" option for popen to open file descriptor with the
1050 close-on-exec flag set. Implemented by Ulrich Drepper.
1052 * Implement "b" mode for fmemopen. In this mode writes writes don't
1053 implicitly add a NUL byte and seeks from the end of the buffer really
1054 use the buffer end, not the string length as the basis.
1055 Implemented by Ulrich Drepper.
1057 * Many functions, exported and internal, now atomically set the close-on-exec
1058 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1060 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1062 Implemented by Pravin Satpute.
1064 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1068 * The following bugs are resolved with this release:
1070 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1071 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1072 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1073 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1074 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1075 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1076 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1078 * New locales: bo_CN, bo_IN, shs_CA.
1080 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1082 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1083 Implemented by Pravin Satpute.
1085 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1087 * nscd caches now all timeouts for DNS entries
1088 Implemented by Ulrich Drepper.
1090 * nscd is more efficient and wakes up less often.
1091 Implemented by Ulrich Drepper.
1093 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1094 vdprintf, and obstack_vprintf.
1095 Implemented by Jakub Jelinek.
1097 * Faster memset for x86-64.
1098 Implemented by Harsha Jagasia and H.J. Lu.
1100 * Faster memcpy on x86.
1101 Implemented by Ulrich Drepper.
1103 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1104 Implemented by Ulrich Drepper.
1106 * Faster sqrt and sqrtf implemention for some PPC variants.
1107 Implemented by Steven Munroe.
1111 * The following bugs are resolved with this release:
1113 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1114 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1115 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1116 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1117 5071, 5103, 5104, 5112, 5113, 5184, 5186
1119 * More checking functions: fread, fread_unlocked, open*, mq_open.
1120 Implemented by Jakub Jelinek and Ulrich Drepper.
1122 * Extend fortification to C++. Implemented by Jakub Jelinek.
1124 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1125 by not recognizing 'a' as a modifier when those specs are requested.
1126 Implemented by Jakub Jelinek.
1128 * PPC optimizations to math and string functions.
1129 Implemented by Steven Munroe.
1131 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1132 options to be passed. Implemented by Ulrich Drepper.
1134 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1136 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1137 Implemented by Ulrich Drepper.
1139 * Handle private futexes in the NPTL implementation.
1140 Implemented by Jakub Jelinek and Ulrich Drepper.
1142 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1143 Implemented by Roland McGrath and Ulrich Drepper.
1145 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1147 * SHA-256 and SHA-512 based password encryption.
1148 Implemented by Ulrich Drepper.
1150 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1151 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1154 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1155 Implemented by Ulrich Drepper.
1159 * The following bugs are resolved with this release:
1161 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1162 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1163 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1164 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1165 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1166 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1167 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1170 * New Linux interfaces: epoll_pwait, sched_getcpu.
1172 * New generic interfaces: strerror_l.
1174 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1178 * The following bugs are resolved with this release:
1180 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1181 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1182 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1183 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1184 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1185 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1186 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1187 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1188 3225, 3251, 3252, 3253, 3273
1190 * For Linux, the sorting of addresses returned by getaddrinfo now also
1191 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1192 Implemented by Ulrich Drepper.
1194 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1195 Implemented by Ulrich Drepper.
1197 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1199 * New iconv module for MIK. Contributed by Alexander Shopov.
1201 * For sites with broken group and/or passwd database, the auto-propagate
1202 option of nscd can prevent creating ID lookup entries from the results
1203 of a name lookup and vice versa. This usually is no problem but some
1204 site might have problems with the default behavior.
1205 Implemented by Ulrich Drepper.
1207 * Iterating over entire database in NIS can be slow. With the
1208 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1209 to trade time for memory. The entire database will be read at once.
1210 Implemented by Ulrich Drepper.
1212 * The interfaces introduced in RFC 3542 have been implemented by
1215 * Support for the new ELF hash table format was added by Ulrich Drepper.
1217 * Support for priority inheritance mutexes added by Jakub Jelinek and
1220 * Support for priority protected mutexes added by Jakub Jelinek.
1222 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1223 or_IN, csb_PL, fy_NL, sr_ME.
1227 * More overflow detection functions.
1229 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1230 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1232 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1233 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1234 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1235 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1236 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1237 by Masahide Washizawa.
1239 * It is now possible to install audit libraries for the dynamic linker using
1240 LD_AUDIT. Implemented by Ulrich Drepper.
1242 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1243 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1244 For a libc and libpthread that works well on Linux 2.4 kernels, we
1245 recommend using the stable 2.3 branch.
1247 * The new function open_wmemstream acts like open_memstream,
1248 but uses a wchar_t wide character buffer.
1250 * The new function ppoll is an improved version of poll, similar to pselect.
1252 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1253 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1254 renameat, unlinkat, linkat, symlinkat, readlinkat.
1256 * New Linux kernel system calls: unshare,
1257 inotify_init, inotify_add_watch, inotify_rm_watch.
1259 * The euidaccess function is now also known by the alias eaccess,
1260 for compatibility with some other systems.
1262 * Timezone data updated to 2006b version.
1266 * The following bugs are resolved with this release:
1268 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1269 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1270 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1271 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1272 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1273 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1275 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1277 * As of this release, GCC 4 can be used to compile the C Library.
1279 * Timezone data updated to 2005m version.
1283 * The following bugs are resolved with this release:
1285 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1286 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1287 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1288 777, 787, 821, 822, 823, 825
1290 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1294 * Support for RFC 3678. Real implementations exist only for Linux so far.
1295 Implemented by Ulrich Drepper.
1297 * nscd can now cache entries persistently. Expiring entries are reloaded.
1298 For speedups the cache can be shared in memory with client processes.
1299 Implemented by Ulrich Drepper.
1301 * nscd can now perform SELinux checks.
1302 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1304 * getaddrinfo queries are now cached. Canonical name lookup is performed
1306 Implemented by Ulrich Drepper.
1308 * The nothrow function attribute is used when headers are used by gcc when
1309 compiling C code. This can avoid significant amounts of exception
1312 * The malloc functions perform more error checking and are stricter when
1313 it comes to reacting on errors. The default action is to terminate
1314 the process after showing an error message. Implemented by Ulrich Drepper.
1316 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1317 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1319 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1320 namespaces using the new function dlmopen(). This feature is of course,
1321 like most other dynamic loading functionality, not available in statically
1322 linked applications. Implemented by Ulrich Drepper.
1324 * Low-overhead boundary checking variants of string and some stdio functions
1325 were added. These are to be used in conjunction with a gcc patch by
1326 Jakub Jelinek which adds calls to these functions if possible.
1327 Implemented by Jakub Jelinek and Ulrich Drepper.
1329 * Old code for several operating systems and machine architectures that
1330 have not been in working condition in a long time have been removed from
1331 the main source tree maintained by the GNU C Library's maintainers.
1332 These files are now reside in the separate `ports' source module
1333 that is usable as an add-on when building the library.
1337 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1338 interrogate the dynamic linker, compatible with the Solaris interface.
1340 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1341 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1343 * getifaddrs now uses the netlink interface on Linux to get its information.
1344 Implemented by Thorsten Kukuk.
1346 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1347 Implemented by Ulrich Drepper.
1349 * support for non-executable stacks on x86 has been added. Changes mostly
1352 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1355 * getaddrinfo now performs destination address selection according to
1360 * Thread-safe interfaces for many functions that access locale data
1361 were added in version 2.3, but these features were omitted from NEWS.
1362 Many functions have variants with an `_l' suffix that take a `locale_t'
1363 object as a parameter rather than consulting the current locale.
1364 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1365 create and maintain `locale_t' objects. Additionally, the new function
1366 `uselocale' sets "the current locale" (as used by functions not so
1367 parameterized) set for an individual thread. These features were added
1368 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1370 * The functions getresuid, getresgid, setresuid, and setresgid, which
1371 have long been available on Linux, are now declared in <unistd.h>
1372 and are now also available on the Hurd.
1374 * ELF thread-local storage support (TLS) now works on x86-64.
1376 * The new dynamic string token $LIB is expanded in shared library names.
1377 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1379 * Aldy Hernandez contributed complete software floating point support for
1380 PowerPC machines with no FPU.
1382 * fexecve is implemented on Linux.
1384 * The `btowc' function should work at least twice as fast due to
1385 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1387 * With approriate thread add-ons cancelable functions are now implemented
1388 in libc.so as well. No need to call the function in libpthread. This
1389 change allowed to finally disable the incorrect and expensive handling
1390 of weak definition in ld.so.
1392 * Yet more PLT entries in libc.so have been removed. We finally arrived
1393 at the bare minimum. Startup times improved appropriately.
1395 * Support for the new Linux/x86 system call interface was added. The
1396 AT_SYSINFO auxiliary vector entry is recognized and handled.
1400 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1403 * iconv (the program and the interface) now accepts empty names (excluding
1404 options like //TRANSLIT) to mean "use charset of current locale".
1406 * localedef can now transliterate characters in strings which are not in
1407 the provided charmap. The information from the input locale is used.
1409 * Prelinking support was added for ELF targets. This requires additional
1410 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1412 * Read-only stdio streams now use mmap to speed up operation by eliminating
1413 copying and buffer underflows. To use add 'm' to the mode string of
1414 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1416 * The malloc functions were completely rewritten by Wolfram Gloger based
1417 on Doug Lea's malloc-2.7.0.c.
1419 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1420 implementation of regex.
1422 * Bruno Haible upgraded the iconv and locale implementation to support
1425 * Contents of the LC_* and LANG environment variables in the CEN style are
1426 not recognized anymore. It never was used. Change by Ulrich Drepper.
1428 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1429 thread-local storage (TLS) ABI on some platforms.
1430 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1432 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1433 EUC-JISX0213, and TSCII.
1435 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1436 BSD-compatible interface for getting all network interface addresses.
1437 Implementation for IPv4 by Roland McGrath.
1439 * Loading of locale data is faster due to the introduction of a locale
1440 archive. Implemented by Roland McGrath and Ulrich Drepper.
1442 * Startup times are significantly reduced by not using exported functions
1443 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1446 * Steven Munroe contributed a port to PowerPC64/Linux.
1450 * The Hurd now uses the GNU libio implementation of stdio rather than the
1451 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1453 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1454 with the same behavior as the Linux system call of the same name.
1458 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1459 128-bit long double format.
1461 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1462 IBM1161, and IBM1162 charsets.
1464 * Andreas Jaeger contributed a port to x86-64/Linux.
1466 * Peter Bruin contributed a port to PowerPC/Hurd.
1468 * libc functions using I/O streams now can handle wide-oriented streams
1471 * optimizations in the dynamic linker. Binaries created by recent binutils
1472 versions start up quicker due to reduced time spent on relocations.
1474 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1478 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1479 asinh, atanh, j0 for the 128-bit long double format.
1481 * Bruno Haible updated all the code handling Unicode in some form to
1482 support Unicode 3.1.
1484 * Speed of regex for single-byte locales is back to previous levels.
1485 Patch by Isamu Hasegawa.
1487 * Alpha, SPARC, and IA-64 now also using floating stacks.
1489 * Startup time of internationalized applications greatly improved through
1490 iconv cache. Use iconvconfig to generate the cache file.
1491 Contributed by Ulrich Drepper.
1493 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1494 severe performance problems. Patch by David Mosberger.
1496 * The Hurd port got a lot more functionality like AIO, various stdio
1497 extensions, etc. Mainly done by Roland McGrath.
1499 * mtrace can now lookup symbols in shared libraries.
1503 * Intel's IA-64 math library is largely integrated. It provides fast and
1504 accurate implementatations for most basic and standard math functions
1505 in float, double, and long double format.
1507 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1508 and asin for the 96-bit long double format and asin, log, tan for the
1509 128-bit long double format.
1511 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1512 The basic double functions exist today. Contributed by Abraham Ziv
1513 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1514 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1516 * An asynchronous name lookup library was added. The interface is designed
1517 after POSIX AIO. The proposal was circulated beforehand to get comments.
1518 No negative ones came in. Implemented by Ulrich Drepper.
1520 * Port to S390/64bit contributed by Martin Schwidefsky
1521 <schwidefsky@de.ibm.com>.
1523 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1524 of functions for Linux/IA-64.
1526 * The RPC code is now thread safe. Threads can now use the same service
1527 of different services at the same time. Patch by Eric Norum
1528 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1530 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1531 family of functions for Linux/S390.
1533 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1534 of functions for Linux/x86.
1536 * Port to Linux/CRIS contributed by Axis Communications.
1540 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1541 we can now check for namespace violations and missing declarations. The
1542 result is that almost all headers are now Unix-compliant (as defined in
1543 the upcoming XPG6). The negative side is that some programs might need
1544 corrections, too, if they depend on the incorrect form of the headers in
1545 previous versions which defined too many symbols and included too many
1548 * regex now handles multibyte character sets correctly.
1549 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1551 * iconv (the program) does now conform to the upcoming XPG6 and handles
1552 charmaps. Instead of the charset names the path of charmaps can be
1553 provided and the conversion happens based on this data.
1554 Contributed by Ulrich Drepper.
1556 * The locale program now provides detailed information about the installed
1561 only lists the names of the supported locales
1565 provides details such as country, language, and codeset name.
1566 Contributed by Ulrich Drepper.
1570 * The gencat program now parses the input file according to the charset
1571 selected by the LC_CTYPE category. This is important for stateful
1572 character sets. To make generating catalogs easier there is a way
1573 to overwrite the charset selected by the locale: before the first
1574 message or $ quote line the catalog can contain a line like
1576 $ codeset=ISO-8859-2
1578 to select the charset (ISO-8859-2 in this case).
1580 Implemented by Shinya Hanataka and Ulrich Drepper.
1582 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1583 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1584 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1586 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1587 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1589 * The LANGUAGE environment variable is now ignored unless the locale is
1590 changed from the default "C" locale.
1592 * The usual bug fixes.
1596 * Greg McGary added runtime support for bounds checking using gcc's
1597 new -fbounded-pointers option. ix86 target is complete. PowerPC
1600 * Thorsten Kukuk added secure mode support to nscd.
1602 * The Berkeley db libraries have been removed.
1604 Related, the nss_db module is now in a separate package since it
1605 obviously requires a database library being available.
1607 * Wide character I/O streams implemented by Ulrich Drepper.
1609 * Functions from the extended socket API added by Ulrich Drepper.
1611 * Functions feenableexcept and fedisableexcept to control the
1612 behaviour of individual exceptions have been added by Andreas Jaeger.
1614 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1616 * The resolver code has been updated from bind 8.2.3-T5B which supports
1617 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1620 This change could in some situations effect backward compatibility. Since
1621 now `_res' is a thread-local instead of a global variable, modifying it
1622 in one thread does not have any effect in other threads.
1624 The resolver library was also extended to allow IPv6 as the transport
1625 protocol for the requests. This work was done by Stig Venaas.
1627 * Compatibility code for K&R C compilers has been removed from the
1628 header files. A ISO C compiler is needed to use the library
1629 (conforming to either C89 or C99 standard).
1631 * Complete rewrite of the localedef program to support multibyte character
1632 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1633 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1634 Implemented by Ulrich Drepper.
1636 Bruno Haible significantly improved the generation and use of the data
1637 structures for the wide character tables.
1639 * Plural handling in gettext implemented by Ulrich Drepper.
1641 * The utmp daemon has been removed.
1643 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1645 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1648 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1650 * POSIX barriers implemented by Kaz Kylheku.
1652 * POSIX spawn function family implemented by Ulrich Drepper.
1654 * POSIX spinlocks are now available.
1656 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1658 * the configure option --enable-kernel=X.Y.Z allows to strip out
1659 compatibility for kernel versions before X.Y.Z. This is currently only
1660 implemented for Linux.
1662 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1663 field sin6_scope_id. This means that all programs using IPv6 should be
1664 recompiled. Don't expect binary compatibility with previous glibc
1667 * various conversion modules for IBM character sets contributed by
1670 * IA-64 port by Jes Sorensen and HJ Lu.
1684 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1686 * New xdr functions are added; some rpc functions are now 64bit clean.
1688 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1690 * Fixed known incompatibilities with glibc 2.0.
1692 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1694 * Optimized a number of functions (especially the ELF dynamic loader).
1696 * Update timezone data files.
1698 * lots of charmaps corrections
1700 * some new locale definitions and charmaps
1705 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1706 conform to POSIX member type requirements. Symbol versions have been
1707 adjusted as needed within the library, and for direct use by applications,
1708 but there is potential for problems if third-party libraries use
1709 struct timeval as part of their interface. This does not present
1710 a problem for X and other "essential" system libraries.
1712 * An additional locale model to support C++ Standard Library locale
1713 model and probably more was implemented by Ulrich Drepper.
1715 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1718 * Miles Bader provided the `argp' function family to support hierachical
1719 command line argument parsing, layered on top of getopt.
1721 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1723 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1726 * scanf recognizes the %a and %A format for scanning floating point numbers.
1728 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1729 information and interfaces for the available integer types.
1731 * about 130 new math functions were added to implement the ISO C9x math
1734 * the new header <complex.h> contains definitions of the complex math
1735 functions from ISO C 9X.
1737 * the new header <tgmath.h> defines generic macros to use complex or
1738 real valued functions.
1740 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1742 * Andreas Jaeger provided a test suite for the math library.
1744 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1746 * Ulrich Drepper added character set conversion functions (iconv).
1748 * Optimized string functions have been added.
1750 * The localedata addon is now part of glibc.
1752 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1754 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1755 daemon for NSS (nscd).
1757 Missing a better place here are some numbers on improvements. Under
1758 Linux 2.1.125 un-tar-ing the kernel sources takes
1762 using local files 12.19s 6.88s 22.91s
1764 using NIS 13.92s 8.91s 26.34s
1766 using NIS & nscd 10.37s 7.34s 25.30s
1768 using NIS+ 27.57s 30.37s 640.46s
1770 using NIS+ & nscd 10.25s 7.83s 26.51s
1772 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1774 Keep in mind that non-namelookup related operations dominate above times.
1775 It was just a common complain that using NIS+ unpacking the kernel is
1778 [1] The old nscd implementation is not available anymore since it was
1779 distributed with glibc up to version 2.0.98 and thus is now replaced.
1781 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1783 * Mark Kettenis provided a Hesiod NSS module.
1785 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1786 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1788 * rcmd can now handle netgroups (Dick Streefland).
1790 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1793 * Support for the IPv6 protocol has been added to the socket API, as per the
1794 latest draft standards.
1796 * Support for Linux 2.2 has been added.
1798 * Interface changes relative to the latest 2.0.x release:
1799 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1800 addseverity NEW: Unix98
1801 alphasort64 NEW: LFS
1802 argp_err_exit_status NEW: argp, GNU ext
1803 argp_error NEW: argp, GNU ext
1804 argp_failure NEW: argp, GNU ext
1805 argp_help NEW: argp, GNU ext
1806 argp_parse NEW: argp, GNU ext
1807 argp_program_bug_address NEW: argp, GNU ext
1808 argp_program_version NEW: argp, GNU ext
1809 argp_program_version_hook NEW: argp, GNU ext
1810 argp_state_help NEW: argp, GNU ext
1811 argp_usage NEW: argp, GNU ext
1812 authdes_create NEW: Secure RPC
1813 authdes_getucred NEW: Secure RPC
1814 authdes_pk_create NEW: Secure RPC
1815 backtrace NEW: GNU ext.
1816 backtrace_symbols NEW: GNU ext.
1817 backtrace_symbols_fd NEW: GNU ext.
1819 cacosf NEW: ISO C 9x
1820 cacosh NEW: ISO C 9x
1821 cacoshf NEW: ISO C 9x
1822 cacoshl NEW: ISO C 9x
1823 cacosl NEW: ISO C 9x
1830 casinf NEW: ISO C 9x
1831 casinh NEW: ISO C 9x
1832 casinhf NEW: ISO C 9x
1833 casinhl NEW: ISO C 9x
1834 casinl NEW: ISO C 9x
1836 catanf NEW: ISO C 9x
1837 catanh NEW: ISO C 9x
1838 catanhf NEW: ISO C 9x
1839 catanhl NEW: ISO C 9x
1840 catanl NEW: ISO C 9x
1841 cbc_crypt NEW: Secure RPC
1845 ccoshf NEW: ISO C 9x
1846 ccoshl NEW: ISO C 9x
1852 cimagf NEW: ISO C 9x
1853 cimagl NEW: ISO C 9x
1854 clearerr_locked REMOVED
1855 clntunix_create NEW: sunrpc ext
1857 clog10 NEW: ISO C 9x
1858 clog10f NEW: ISO C 9x
1859 clog10l NEW: ISO C 9x
1869 cprojf NEW: ISO C 9x
1870 cprojl NEW: ISO C 9x
1872 crealf NEW: ISO C 9x
1873 creall NEW: ISO C 9x
1878 csinhf NEW: ISO C 9x
1879 csinhl NEW: ISO C 9x
1882 csqrtf NEW: ISO C 9x
1883 csqrtl NEW: ISO C 9x
1887 ctanhf NEW: ISO C 9x
1888 ctanhl NEW: ISO C 9x
1890 des_setparity NEW: Secure RPC
1891 ecb_crypt NEW: Secure RPC
1892 endutxent NEW: Unix98
1894 exp10f NEW: ISO C 9x
1895 exp10l NEW: ISO C 9x
1899 fattach NEW: STREAMS
1900 fdetach NEW: STREAMS
1904 feclearexcept NEW: ISO C 9x
1905 fegetenv NEW: ISO C 9x
1906 fegetexceptflag NEW: ISO C 9x
1907 fegetround NEW: ISO C 9x
1908 feholdexcept NEW: ISO C 9x
1910 feraiseexcept NEW: ISO C 9x
1911 ferror_locked REMOVED
1912 fesetenv NEW: ISO C 9x
1913 fesetexceptflag NEW: ISO C 9x
1914 fesetround NEW: ISO C 9x
1915 fetestexcept NEW: ISO C 9x
1916 feupdateenv NEW: ISO C 9x
1917 fflush_locked REMOVED
1921 fgets_unlocked NEW: GNU ext.
1922 fileno_locked REMOVED
1934 fputc_locked REMOVED
1935 fputs_unlocked NEW: GNU ext.
1936 fread_unlocked NEW: GNU ext.
1941 fstatvfs NEW: Unix98
1945 ftruncate64 NEW: LFS
1947 fwrite_unlocked NEW: GNU ext.
1948 gai_strerror NEW: IPv6
1952 getchar_locked REMOVED
1954 getdate_err NEW: Unix98
1955 getdate_r NEW: GNU ext.
1957 getnameinfo NEW: IPv6
1958 getnetname NEW: Secure RPC
1959 getpmsg NEW: STREAMS
1960 getpt NEW: Unix98 PTY
1961 getrlimit64 NEW: LFS
1962 getutxent NEW: Unix98
1963 getutxid NEW: Unix98
1964 getutxline NEW: Unix98
1965 glob64 NEW: GNU ext.
1966 globfree64 NEW: GNU ext.
1967 gnu_get_libc_release NEW: GNU ext.
1968 gnu_get_libc_version NEW: GNU ext.
1969 grantpt NEW: Unix98 PTY
1970 host2netname NEW: Secure RPC
1972 iconv_close NEW: iconv
1973 iconv_open NEW: iconv
1974 if_freenameindex NEW: IPv6
1975 if_indextoname NEW: IPv6
1976 if_nameindex NEW: IPv6
1977 if_nametoindex NEW: IPv6
1978 in6addr_any NEW: IPv6
1979 in6addr_loopback NEW: IPv6
1980 inet6_isipv4mapped NEW: IPv6
1981 isastream NEW: STREAMS
1982 iswblank NEW: GNU ext.
1983 key_decryptsession NEW: Secure RPC
1984 key_decryptsession_pk NEW: Secure RPC
1985 key_encryptsession NEW: Secure RPC
1986 key_encryptsession_pk NEW: Secure RPC
1987 key_gendes NEW: Secure RPC
1988 key_get_conv NEW: Secure RPC
1989 key_secretkey_is_set NEW: Secure RPC
1990 key_setnet NEW: Secure RPC
1991 key_setsecret NEW: Secure RPC
1992 llrint NEW: ISO C 9x
1993 llrintf NEW: ISO C 9x
1994 llrintl NEW: ISO C 9x
1995 llround NEW: ISO C 9x
1996 llroundf NEW: ISO C 9x
1997 llroundl NEW: ISO C 9x
2002 lrintf NEW: ISO C 9x
2003 lrintl NEW: ISO C 9x
2004 lround NEW: ISO C 9x
2005 lroundf NEW: ISO C 9x
2006 lroundl NEW: ISO C 9x
2008 makecontext NEW: Unix98
2009 mempcpy NEW: GNU ext.
2012 modify_ldt NEW: kernel
2016 nearbyint NEW: ISO C 9x
2017 nearbyintf NEW: ISO C 9x
2018 nearbyintl NEW: ISO C 9x
2019 netname2host NEW: Secure RPC
2020 netname2user NEW: Secure RPC
2021 nexttoward NEW: ISO C 9x
2022 nexttowardf NEW: ISO C 9x
2023 nexttowardl NEW: ISO C 9x
2027 passwd2des NEW: Secure RPC
2029 pow10f NEW: GNU ext.
2030 pow10l NEW: GNU ext.
2033 printf_size NEW: GNU ext.
2034 printf_size_info NEW: GNU ext.
2035 profil_counter REMOVED
2036 pthread_mutexattr_getkind_np REPLACED
2037 pthread_mutexattr_setkind_np REPLACED
2038 ptsname NEW: Unix98 PTY
2039 ptsname_r NEW: Unix98 PTY
2041 putchar_locked REMOVED
2042 putgrent NEW: GNU ext.
2044 putpmsg NEW: STREAMS
2045 pututxline NEW: Unix98
2049 readdir64_r NEW: LFS
2050 remquo NEW: ISO C 9x
2051 remquof NEW: ISO C 9x
2052 remquol NEW: ISO C 9x
2054 roundf NEW: ISO C 9x
2055 roundl NEW: ISO C 9x
2057 scalbln NEW: ISO C 9x
2058 scalblnf NEW: ISO C 9x
2059 scalblnl NEW: ISO C 9x
2061 sendfile NEW: kernel
2062 setcontext NEW: Unix98
2063 setrlimit64 NEW: LFS
2064 setutxent NEW: Unix98
2066 sigignore NEW: Unix98
2067 sigqueue NEW: POSIX.1b
2068 sigrelse NEW: Unix98
2069 sigset NEW: POSIX.1b
2070 sigtimedwait NEW: POSIX.1b
2071 sigwaitinfo NEW: POSIX.1b
2072 sincos NEW: GNU ext.
2073 sincosf NEW: GNU ext.
2074 sincosl NEW: GNU ext.
2078 strcasestr NEW: GNU ext.
2079 strtoimax NEW: ISO C 9x
2080 strtoumax NEW: ISO C 9x
2081 strverscmp NEW: GNU ext.
2082 svcauthdes_stats NEW: Secure RPC
2083 svcunix_create NEW: sunrpc etx
2084 svcunixfd_create NEW: sunrpc ext
2085 swapcontext NEW: Unix98
2086 tcgetsid NEW: Unix98 PTY
2087 tdestroy NEW: GNU ext.
2088 tgamma NEW: ISO C 9x
2089 tgammaf NEW: ISO C 9x
2090 tgammal NEW: ISO C 9x
2094 truncf NEW: ISO C 9x
2095 truncl NEW: ISO C 9x
2097 unlockpt NEW: Unix98 PTY
2098 updwtmpx NEW: Unix98
2099 user2netname NEW: Secure RPC
2100 utmpxname NEW: Unix98
2101 versionsort NEW: GNU ext.
2102 versionsort64 NEW: GNU ext.
2104 wcscasecmp NEW: GNU ext.
2105 wcsncasecmp NEW: GNU ext.
2106 wcsnlen NEW: GNU ext.
2107 wcstoimax NEW: ISO C 9x
2108 wcstoll NEW: ISO C 9x
2109 wcstoull NEW: ISO C 9x
2110 wcstoumax NEW: ISO C 9x
2112 wordexp NEW: POSIX.2
2113 wordfree NEW: POSIX.2
2114 write_profiling REMOVED
2115 xdecrypt NEW: Secure RPC
2116 xdr_authdes_cred NEW: Secure RPC
2117 xdr_authdes_verf NEW: Secure RPC
2118 xdr_cryptkeyarg NEW: Secure RPC
2119 xdr_cryptkeyarg2 NEW: Secure RPC
2120 xdr_cryptkeyres NEW: Secure RPC
2121 xdr_getcredres NEW: Secure RPC
2122 xdr_key_netstarg NEW: Secure RPC
2123 xdr_key_netstres NEW: Secure RPC
2124 xdr_keybuf NEW: Secure RPC
2125 xdr_keystatus NEW: Secure RPC
2126 xdr_netnamestr NEW: Secure RPC
2127 xdr_sizeof NEW: Secure RPC
2128 xdr_unixcred NEW: sunrpc ext
2129 xencrypt NEW: Secure RPC
2130 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2141 * inet_ntoa is thread-safe
2143 * updwtmp is moved from libutil to libc
2145 * rewrite of cbrt function
2147 * update of timezone data
2161 * add atoll function
2163 * fix complex problems in Berkeley DB code
2165 * fix math functions
2169 * fixed lots of header problems (especially Linux/GNU specific)
2171 * dynamic loader preserves all registers
2173 * Roland McGrath provided support for handling of auxiliary objects in
2174 the ELF dynamic loader.
2176 * support for parallel builds is improved
2180 * GNU extensions are no longer declared by default. To enable them you
2181 must define the macro `_GNU_SOURCE' in your program or compile with
2184 * The library has changed from using GNU ld symbol aliases to using weak
2185 symbols where available. The ELF object file format supports weak
2186 symbols; GNU ld also supports weak symbols in the a.out format. (There
2187 is also now support for other GNU ld extensions in ELF. Use the
2188 `--with-elf' option to configure to indicate you have ELF, and
2189 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2190 of many files which contained only symbol aliases, reducing the size of
2191 the source and the compiled library; many other files were renamed to
2192 less cryptic names previously occupied by the symbol alias files.
2193 There is a new header file <elf.h> for programs which operate on
2194 files in the ELF format.
2196 * Converted to Autoconf version 2, so `configure' has more options.
2197 Run `configure --help' to see the details.
2199 * The library can now be configured to build profiling, highly-optimized
2200 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2201 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2202 `configure' enable building these extra libraries. The shared library is
2203 built by default when using both ELF and GNU ld. When shared libraries
2204 are enabled, the new library `-ldl' is available for arbitrary run-time
2205 loading of shared objects; its interface is defined in <dlfcn.h>. The
2206 new header file <link.h> gives access to the internals of the run-time
2207 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2208 application of same name on other systems and it provides information
2209 about dynamically linked binaries.
2211 * The C library now provides the run-time support code for profiling
2212 executables compiled with `-pg'. Programs can control the profiling code
2213 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2214 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2215 the support for this file format was contributed by David Mosberger-Tang.
2217 * The math code has been replaced with a math library based on fdlibm from
2218 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2219 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2220 functions. The math functions now reside in a separate library, so
2221 programs using them will need to use `-lm' their linking commands.
2223 * John C. Bowman contributed optimized ix87 assembler inline functions.
2225 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2226 mechanism similar to that found in Solaris 2. This is now used for the
2227 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2228 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2229 file controls what services are used for each individual database. This
2230 works by loading shared libraries with names specified in `nsswitch.conf',
2231 so service modules can be changed or added at any time without even
2232 relinking any program. Currently there are the file, db, and NIS based
2233 NSS services available.
2235 * The new functions `strtoq' and `strtouq' parse integer values from
2236 strings, like `strtol' and `strtoul', but they return `long long int' and
2237 `unsigned long long int' values, respectively (64-bit quantities).
2239 * The new functions `strtof' and `strtold' parse floating-point values from
2240 strings, like `strtod', but they return `float' and `long double' values,
2241 respectively (on some machines `double' and `long double' are the same).
2243 * Ulrich Drepper has contributed new implementations of the floating-point
2244 printing and reading code used in the `printf' family of functions and
2245 `strtod', `strtof', and `strtold'. These new functions are perfectly
2246 accurate, and much faster than the old ones.
2248 * The implementation of the POSIX locale model was completely rewritten by
2249 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2250 to compile the POSIX locale definition.
2252 * The former dummy implementations of the strcoll and strxfrm function are
2253 now replaced by fully functional code contributed by Ulrich Drepper. The
2254 collation information comes from the POSIX locale definitions.
2256 * The new header <langinfo.h> defines an interface for accessing
2257 various locale-dependent data (using the locale chosen with `setlocale').
2259 * Ulrich Drepper has contributed a new suite of functions for operation on
2260 wide-character and multibyte-character strings, in <wchar.h>;
2261 and classification and case conversion of wide characters, in <wctype.h>.
2262 These new functions are conforming to the ISO C, Amendement 1 specification.
2264 * There is now a second implementation of the standard I/O library available.
2265 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2266 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2268 * You can now use positional parameter specifications in format strings
2269 for the `printf' and `scanf' families of functions. For example,
2270 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2271 ``Number 6, Mr Jones''. This is mainly useful when providing different
2272 format strings for different languages, whose grammars may dictate
2273 different orderings of the values being printed. To support this
2274 feature, the interface for `register_printf_handler' has changed; see
2275 the header file <printf.h> for details.
2277 * The `printf' and `scanf' families of functions now understand a new
2278 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2279 to group numbers as indicated by the locale; for `scanf' and friends, this
2280 says to accept as valid only a number with all the proper grouping
2281 separators in the right places. In the default "C" locale, numbers are
2282 not grouped; but locales for specific countries will define the usual
2283 conventions (i.e. separate thousands with `,' in the US locale).
2285 * The pgrp functions have been regularized, slightly incompatibly but much
2286 less confusingly. The core functions are now `getpgid' and `setpgid',
2287 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2288 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2289 provided for compatibility. There is no longer an incompatible `getpgrp'
2290 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2292 * The new header file <fts.h> and suite of functions simplify programs that
2293 operate on directory trees. This code comes from 4.4 BSD.
2295 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2296 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2297 NSS scheme used in glibc.
2299 * There is a new malloc debugging hook `__memalign_hook'.
2301 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2302 `unsigned int' in <sys/types.h>. These are for compatibility only and
2303 their use is discouraged.
2305 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2306 done differently, so that it works even without GNU ld.
2308 * New function `euidaccess' checks allowed access to a file like `access',
2309 but using the effective IDs instead of the real IDs.
2311 * The time zone data files have been updated for the latest and greatest
2312 local time conventions of the countries of the world.
2314 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2317 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2318 for formatting floating-point numbers. They are provided only for
2319 compatibility; new programs should use `sprintf' instead. There are
2320 also equivalent function for the `long double' floating-point type and
2321 all functions also exist in a reentrant form.
2323 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2324 functions for maintaining the login-record files (primarily of use to
2325 system programs such as `login'), and convenient functions for
2326 allocating and initializing a pseudo-terminal (pty) device.
2328 * Ulrich Drepper has contributed new support for System V style
2329 shared memory and IPC on systems that support it.
2331 * Ulrich Drepper has contributed several miscellaneous new functions found
2332 in System V: The `hsearch' family of functions provide an effective
2333 implementation of hash tables; `a64l' and `l64a' provide a very simple
2334 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2337 * Ulrich Drepper has contributed new reentrant counterparts for the
2338 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2340 * Ulrich Drepper has contributed new, highly-optimized versions of several
2341 string functions for the i486/Pentium family of processors.
2343 * Ulrich Drepper has updated the Linux-specific code, based largely
2344 on work done in Hongjiu Lu's version of GNU libc for Linux.
2345 The GNU library now supports Linux versions 2.0.10 and later,
2346 using the ELF object file format (i[3456]86-*-linux).
2348 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2350 * David Mosberger-Tang and Richard Henderson have ported the C library
2351 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2352 dynamic linking support for ELF/Alpha.
2354 * Richard Henderson contributed several Alpha optimized assembler function
2355 for arithmetic and string handling.
2357 * Ulrich Drepper has contributed a new set of message catalog functions to
2358 support multiple languages using the <libintl.h> interface, for use with
2359 his new package GNU gettext. Translation volunteers have contributed
2360 catalogs of the library's messages in Spanish, German, and Korean.
2362 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2363 program and the `catgets' function for reading the catalog files it
2364 creates. (The <libintl.h> interface is preferred; we include the
2365 <nl_types.h> interface using `catgets' only for source compatibility with
2366 programs already written to use it.)
2368 * New header file <values.h> gives SVID-compatible names for <limits.h>
2371 * Various new macros, declarations, and small header files for compatibility
2374 * New function `group_member' is a convenient way to check if a process has
2375 a given effective group ID.
2377 * When using GCC 2.7 and later, the socket functions are now declared in a
2378 special way so that passing an argument of type `struct sockaddr_in *',
2379 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2380 `struct sockaddr *' type, does not generate a type-clash warning.
2382 * New function `error' declared in header file <error.h> is a convenient
2383 function for printing error messages and optionally exiting; this is the
2384 canonical function used in GNU programs. The new functions `err', `warn',
2385 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2386 doing the same thing.
2388 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2389 POSIX.2 `glob' function to do ~ and {...} expansion.
2391 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2392 `clearenv' which is used in POSIX.9 is also available.
2394 * New function `getsid' returns session ID number on systems that support it.
2396 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2397 files <db.h> and <mpool.h> provide a rich set of functions for several
2398 types of simple databases stored in memory and in files, and <ndbm.h> is
2399 an old `ndbm'-compatible interface using the `db' functions. Link with
2400 `-ldb' to get these functions.
2402 * New macro `strdupa' copies a string like `strdup', but uses local stack
2403 space from `alloca' instead of dynamic heap space from `malloc'.
2405 * New function `strnlen' is like `strlen' but searches only a given maximum
2406 number of characters for the null terminator. `stpncpy', `strndup' and
2407 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2410 * New function `statfs' in header <sys/statfs.h>.
2412 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2413 provide convenient functions for operating on blocks of null-terminated
2416 * A new suite of functions in <utmp.h> handle all the details of reading
2417 and writing the utmp file.
2419 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2422 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2423 completely POSIX compliant and also implemented the extended functionality
2424 to handle alternate digit representation and alternate era date formats.
2426 * Ulrich Drepper provided an implementation of the `strptime' function
2427 defined in XPG4.2 which transforms a string into a `struct tm' value.
2429 * Paul Eggert provided the tzselect shell script as part of the timezone
2430 code. The shell script makes it easy to select the correct timezone
2433 * The implementation of the malloc family of functions is completely replaced
2434 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2435 The implementation uses the mmap function (if available) and it is
2436 optimized for the use in multi threaded programs.
2438 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2439 functions. This new functionality is usable by specifying a special
2440 salt string and it is compatible with implementation on *BSD systems.
2442 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2443 `getsubopt' to handle second level command line options, `bsd_signal'
2444 to access BSD style `signal' functionality, the obsolete `regexp' style
2447 * the `lchown' function is available on system which support this
2450 * The implementation of the shadow password handling function was contributed
2453 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2455 * POSIX.1g support was added. The <sys/select.h> header is available,
2456 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2457 implementation of `getaddrinfo'.
2461 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2463 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2464 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2466 * The new function `daemon' from 4.4 BSD is useful for server programs that
2467 want to put themselves in the background.
2469 * Joel Sherrill has contributed support for several standalone boards that
2470 run without an operating system.
2472 * `printf', `scanf' and friends now accept a `q' type modifier for long
2473 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2475 * All of the code taken from BSD (notably most of the math and networking
2476 routines) has been updated from the BSD 4.4-Lite release.
2478 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2480 * The new functions `getdomainname' and `setdomainname' fetch or change the
2481 YP/NIS domain name. These are system calls which exist on systems which
2484 * The time zone data files have been updated for the latest international
2487 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2488 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2492 * The C library now includes support for Sun RPC, from Sun's free
2493 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2494 are included. (There is still no support for YP.)
2496 * Tom Quinn has contributed a port of the C library to SGI machines running
2497 Irix 4 (mips-sgi-irix4).
2499 * The new `lockf' function is a simplified interface to the locking
2500 facilities of `fcntl', included for compatibility.
2502 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2504 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2506 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2509 * The error message printed by `assert' for a failed assertion now includes
2510 the name of the program (if using GNU ld) and the name of the calling
2511 function (with versions of GCC that support this).
2513 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2515 * The library now includes the <sys/mman.h> header file and memory
2516 management functions `mmap', `munmap', `mprotect', `msync', and
2517 `madvise', on systems that support those facilities.
2519 * The interface for `mcheck' has changed slightly: the function called to
2520 abort the program when an allocation inconsistency is detected now takes
2521 an argument that indicates the type of failure. The new function
2522 `mprobe' lets you request a consistency check for a particular block at
2523 any time (checks are normally done only when you call `free' or `realloc'
2526 * It is now possible to easily cross-compile the C library, building on one
2527 system a library to run on another machine and/or operating system. All
2528 you need to do is set the variable `HOST_CC' in `configparms' to the
2529 native compiler for programs to run on the machine you are building on (a
2530 few generator programs are used on Unix systems); set `CC' to the
2533 * The new function `fexecve' (only implemented on the GNU system) executes
2534 a program file given a file descriptor already open on the file.
2538 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2539 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2541 * You can set the variable `libprefix' in `configparms' to specify a prefix
2542 to be prepended to installed library files; this makes it easy to install
2543 the GNU C library to be linked as `-lgnuc' or whatever.
2545 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2546 copies a limited number of characters from a string, and returns the
2547 address of the last character written.
2549 * You no longer need to check for whether the installed `stddef.h' is
2550 compatible with the GNU C library. configure now checks for you.
2552 * You can now define a per-stream `fileno' function to convert the
2553 stream's cookie into an integral file descriptor.
2555 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2556 allocates zero bytes of storage, and returns a unique pointer which
2557 you can pass to `realloc' or `free'. The behavior is undefined if
2558 you dereference this pointer.
2560 * The C library now runs on Sony NEWS m68k machines running either
2561 NewsOS 3 or NewsOS 4.
2563 * The new `syscall' function is a system-dependent primitive function
2564 for invoking system calls. It has the canonical behavior on Unix
2565 systems, including unreliable return values for some calls (such as
2566 `pipe', `fork' and `getppid').
2568 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2569 to `EAGAIN', which is the preferred name. On systems whose kernels
2570 use two distinct codes, the C library now translates EWOULDBLOCK to
2571 EAGAIN in every system call function.
2575 * The GNU C Library Reference Manual is now distributed with the library.
2576 `make dvi' will produce a DVI file of the printed manual.
2577 `make info' will produce Info files that you can read on line using C-h i
2578 in Emacs or the `info' program.
2579 Please send comments on the manual to bug-glibc-manual@gnu.org.
2581 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2583 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2585 * Jason Merrill has contributed a port to the Sequent Symmetry running
2586 Dynix version 3 (i386-sequent-dynix).
2588 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2589 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2591 * New function `memory_warnings' lets you arrange to get warnings when
2592 malloc is running out of memory to allocate, like Emacs gives you.
2594 * The C library now contains the relocating allocator used in Emacs 19 for
2595 its editing buffers. This allocator (ralloc) minimizes allocation
2596 overhead and fragmentation by moving allocated regions around whenever it
2597 needs to. You always refer to a ralloc'd region with a "handle" (a
2598 pointer to a pointer--an object of type `void **').
2600 * There is a new `printf' format: `%m' gives you the string corresponding
2601 to the error code in `errno'.
2603 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2604 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2605 pass, the `a' modifier says to fill in a `char **' you pass with a
2608 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2609 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2610 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2612 * `mkstemp' is a traditional Unix function to atomically create and open a
2613 uniquely-named temporary file.
2617 * The standard location for the file that says what the local timezone is
2618 has changed again. It is now `/usr/local/etc/localtime' (or more
2619 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2621 * The distribution no longer contains any files with names longer than 14
2624 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2625 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2627 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2631 * The configuration process has changed quite a bit. The `configure'
2632 script is now used just like the configuration scripts for other GNU
2633 packages. The `sysdeps' directory hierarchy is much rearranged.
2634 The file `INSTALL' explains the new scheme in detail.
2636 * The header files no longer need to be processed into ANSI C and
2637 traditional C versions. There is just one set of files to install, and
2638 it will work with ANSI or old C compilers (including `gcc -traditional').
2640 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2641 MIPS DECStation running Ultrix 4.
2643 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2644 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2645 made itself into a shared library.
2647 * Yet further improved support for the i386, running 4.3 BSD-like systems
2648 (such as Mach 3 with the Unix single-server), or System V.
2650 * New function `strncasecmp' to do case-insensitive string comparison
2651 with limited length.
2653 * New function `strsep' is a reentrant alternative to `strtok'.
2655 * New functions `scandir' and `alphasort' for searching directories.
2657 * New function `setenv' is a better interface to `putenv'.
2659 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2660 function for traversing a directory tree.
2662 * The GNU obstack package is now also part of the C library.
2663 The new function `open_obstack_stream' creates a stdio stream that
2664 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2665 formatted output directly to an obstack.
2667 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2668 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2670 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2672 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2673 things to your strings.
2675 * There are some new test programs: test-fseek, testmb, and testrand.
2677 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2678 These ports are not finished, but are a good starting place for really
2679 supporting those systems.
2681 * `/etc/localtime' is now the standard location for the file that says what
2682 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2683 This follows the general principle that `/etc' is the place for all local
2684 configuration files.
2686 * The C library header files now use `extern "C"' when used by the C++
2687 compiler, so the C library should now work with C++ code.
2689 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2690 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2693 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2694 function which uses the `merge sort' algorithm, and is said to be
2695 significantly faster than the old GNU `qsort' function. Merge sort is
2696 now the standard `qsort' function. The new algorithm can require a lot
2697 of temporary storage; so, the old sorting function is called when the
2698 required storage is not available.
2700 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2701 provides the Unix `crypt' function, plus some other entry points.
2703 * The code and header files taken from 4.4 BSD have been updated with the
2704 latest files released from Berkeley.
2706 ----------------------------------------------------------------------
2707 Copyright information:
2709 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2711 Permission is granted to anyone to make or distribute verbatim copies
2712 of this document as received, in any medium, provided that the
2713 copyright notice and this permission notice are preserved,
2714 thus giving the recipient permission to redistribute in turn.
2716 Permission is granted to distribute modified versions
2717 of this document, or of portions of it,
2718 under the above conditions, provided also that they
2719 carry prominent notices stating who last changed them.
2722 version-control: never