1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The following bugs are resolved with this release:
12 438, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152, 14094,
13 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969, 16159, 16339,
14 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538, 16559, 16560,
15 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293, 17322, 17403,
16 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620, 17621, 17628,
17 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833, 17836, 17841,
18 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965, 17967, 17969,
19 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007, 18019, 18020,
20 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042, 18043, 18046,
21 18047, 18049, 18068, 18080, 18093, 18100, 18104, 18110, 18111, 18116,
22 18125, 18128, 18134, 18138, 18185, 18196, 18197, 18206, 18210, 18211,
23 18217, 18219, 18220, 18221, 18234, 18244, 18245, 18247, 18287, 18319,
24 18324, 18333, 18346, 18371, 18383, 18397, 18400, 18409, 18410, 18412,
25 18418, 18422, 18434, 18444, 18468, 18469, 18470, 18479, 18483, 18495,
26 18496, 18497, 18498, 18502, 18507, 18508, 18512, 18513, 18519, 18520,
27 18522, 18527, 18528, 18529, 18530, 18532, 18533, 18534, 18536, 18539,
28 18540, 18542, 18544, 18545, 18546, 18547, 18549, 18553, 18557, 18558,
29 18569, 18583, 18585, 18586, 18592, 18593, 18594, 18602, 18612, 18613,
30 18619, 18633, 18641, 18643, 18648, 18657, 18676, 18694, 18696.
32 * Cache information can be queried via sysconf() function on s390 e.g. with
33 _SC_LEVEL1_ICACHE_SIZE as argument.
35 * A buffer overflow in gethostbyname_r and related functions performing DNS
36 requests has been fixed. If the NSS functions were called with a
37 misaligned buffer, the buffer length change due to pointer alignment was
38 not taken into account. This could result in application crashes or,
39 potentially arbitrary code execution, using crafted, but syntactically
40 valid DNS responses. (CVE-2015-1781)
42 * The time zone file parser has been made more robust against crafted time
43 zone files, avoiding heap buffer overflows related to the processing of
44 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
45 large time zone data files. Overly long time zone specifiers in the TZ
46 variable no longer result in stack overflows and crashes.
48 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
49 for LD and GD on x86 and x86-64, has been implemented. You will need
50 binutils-2.24 or later to enable this optimization.
52 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
53 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
54 Hat). These updates cause user visible changes, such as the fix for bug
57 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
58 and getXXbyYY NSS calls for the same database, causing a denial-of-service
59 condition in some applications.
61 * Added vector math library named libmvec with the following vectorized x86_64
62 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
64 The library can be disabled with --disable-mathvec. Use of the functions is
65 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
66 Shared library libmvec.so is linked in as needed when using -lm (no need to
67 specify -lmvec explicitly for not static builds).
68 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
70 * A new fmemopen implementation has been added with the goal of POSIX
71 compliance. The new implementation fixes the following long-standing
72 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
73 old implementation is still present for use be by existing binaries.
75 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
76 releases. It has been fixed to match 2.19 and older, but binaries built
77 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
79 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
80 Contributed by Roland McGrath (Google).
84 * The following bugs are resolved with this release:
86 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
87 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
88 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
89 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
90 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
91 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
92 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
93 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
94 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
95 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
98 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
99 too little memory for the to-be-scanned arguments and overflow the
100 allocated buffer. The implementation now correctly computes the required
101 buffer size when using malloc, and switches to malloc from alloca as
104 * A new semaphore algorithm has been implemented in generic C code for all
105 machines. Previous custom assembly implementations of semaphore were
106 difficult to reason about or ensure that they were safe. The new version
107 of semaphore supports machines with 64-bit or 32-bit atomic operations.
108 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
109 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
111 * Port to Altera Nios II has been contributed by Mentor Graphics.
113 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
114 implementations for powerpc64/powerpc64le.
115 Implemented by Adhemerval Zanella (IBM).
117 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
118 and powerpc64le. This may improve lock scaling of existing programs on
119 HTM capable systems. The lock elision code is only enabled with
120 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
121 powerpc will issue a transaction abort on every syscall to avoid side
122 effects being visible outside transactions.
124 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
125 AArch64. Contributed by ARM Ltd.
127 * i386 memcpy functions optimized with SSE2 unaligned load/store.
129 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
130 under certain input conditions resulting in the execution of a shell for
131 command substitution when the application did not request it. The
132 implementation now checks WRDE_NOCMD immediately before executing the
133 shell and returns the error WRDE_CMDSUB as expected.
135 * CVE-2012-3406 printf-style functions could run into a stack overflow when
136 processing format strings with a large number of format specifiers.
138 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
139 infinite loop if the DNS response contained a PTR record of an unexpected
142 * The minimum GCC version that can be used to build this version of the GNU
143 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
144 still be used to compile programs using the GNU C Library.
146 * The GNU C Library is now built with -Werror by default. This can be
147 disabled by configuring with --disable-werror.
149 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
151 * The obsolete sigvec function has been removed. This was the original
152 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
153 programs have been using instead for about 25 years. Of course, ABI
154 compatibility for old binaries using sigvec remains intact.
156 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
157 with newer versions of bison.
159 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
160 The original MIPS o32 hard-float ABI requires an FPU where double-precision
161 registers overlay two consecutive single-precision registers. MIPS32R2
162 introduced a new FPU mode (FR=1) where double-precision registers extend the
163 corresponding single-precision registers which is incompatible with the
164 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
165 require the use of FR=1 making a transition necessary. New o32 ABI
166 extensions enable users to migrate over time from the original o32 ABI
167 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
168 tracks the ABI of any loaded object and verifies that new objects are
169 compatible. Mode transitions will also be requested as required and
170 unsupportable objects will be rejected. The ABI checks include both soft and
171 hard float ABIs for o32, n32 and n64.
173 GCC 5 with GNU binutils 2.25 onwards:
174 It is strongly recommended that all o32 system libraries are built using the
175 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
176 with the original and all new o32 ABI extensions. Configure a MIPS GCC
177 compiler using --with-fp-32=xx to set this by default.
181 * The following bugs are resolved with this release:
183 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
184 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
185 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
186 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
187 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
188 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
189 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
190 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
191 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
192 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
193 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
194 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
195 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
196 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
197 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
199 * Reverted change of ABI data structures for s390 and s390x:
200 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
201 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
202 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
203 are preserved pointing straight to the same implementation as the old ones.
204 Given that, new callers will simply provide a too-big buffer to these
205 functions. Any applications/libraries out there that embed jmp_buf or
206 ucontext_t in an ABI-relevant data structure that have already been rebuilt
207 against 2.19 headers will have to rebuilt again. This is necessary in any
208 case to revert the breakage in their ABI caused by the glibc change.
210 * Support for file description locks is added to systems running the
211 Linux kernel. The standard file locking interfaces are extended to
212 operate on file descriptions, not file descriptors, via the use of
213 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
214 are associated with an open file instead of a process.
216 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
218 * The minimum Linux kernel version that this version of the GNU C Library
219 can be used with is 2.6.32.
221 * Running the testsuite no longer terminates as soon as a test fails.
222 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
223 with PASS or FAIL lines for individual tests. A summary of the results is
224 printed, including a list of failing lists, and "make check" exits with
225 error status if there were any unexpected failures. "make check
226 stop-on-test-failure=y" may be used to keep the old behavior.
228 * The am33 port, which had not worked for several years, has been removed
231 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
232 supported; they now act the same as _DEFAULT_SOURCE (but generate a
233 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
234 conflicted with POSIX (support for which was removed in 2.19), the
235 interfaces those macros enabled remain available when compiling with
236 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
239 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
241 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
242 This may improve lock scaling of existing programs on TX capable systems.
243 The lock elision code is only built with --enable-lock-elision=yes and
244 then requires a GCC version supporting the TX builtins. With lock elision
245 default mutexes are elided via __builtin_tbegin, if the cpu supports
246 transactions. By default lock elision is not enabled and the elision code
249 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
250 copy the path argument. This allowed programs to cause posix_spawn to
251 deference a dangling pointer, or use an unexpected pathname argument if
252 the string was modified after the posix_spawn_file_actions_addopen
255 * All supported architectures now use the main glibc sysdeps directory
256 instead of some being in a separate "ports" directory (which was
257 distributed separately before glibc 2.17).
259 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
260 On configurations that support it (all Linux configurations), it's now
261 used regardless of the --enable-add-ons switch to configure. It is no
262 longer possible to build such configurations without pthreads support.
264 * Locale names, including those obtained from environment variables (LANG
265 and the LC_* variables), are more tightly checked for proper syntax.
266 setlocale will now fail (with EINVAL) for locale names that are overly
267 long, contain slashes without starting with a slash, or contain ".." path
268 components. (CVE-2014-0475) Previously, some valid locale names were
269 silently replaced with the "C" locale when running in AT_SECURE mode
270 (e.g., in a SUID program). This is no longer necessary because of the
273 * On x86-64, the dynamic linker's lazy-binding support is now compatible
274 with application code using Intel MPX instructions. (With all previous
275 versions, the MPX register state could be clobbered when making calls
276 into or out of a shared library.) Note that while the new dynamic
277 linker is compatible with all known x86 hardware whether or not it
278 supports Intel MPX, some x86 instruction-set emulators might fail to
279 handle the new instruction encodings. This is known to affect Valgrind
280 versions up through 3.9 (but will be fixed in the forthcoming 3.10
281 release), and might affect other tools that do instruction emulation.
283 * Support for loadable gconv transliteration modules has been removed.
284 The support for transliteration modules has been non-functional for
285 over a decade, and the removal is prompted by security defects. The
286 normal gconv conversion modules are still supported. Transliteration
287 with //TRANSLIT is still possible, and the //IGNORE specifier
288 continues to be supported. (CVE-2014-5119)
290 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
291 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
292 resulting a denial-of-service security vulnerability in applications which
293 use functions related to iconv. (CVE-2014-6040)
297 * The following bugs are resolved with this release:
299 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
300 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
301 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
302 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
303 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
304 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
305 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
306 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
307 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
308 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
309 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
310 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
311 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
312 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
313 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
314 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
315 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
316 16431, 16453, 16474, 16506, 16510, 16529
318 * Slovenian translations for glibc messages have been contributed by the
319 Translation Project's Slovenian team of translators.
321 * The public headers no longer use __unused nor __block. This change is to
322 support compiling programs that are derived from BSD sources and use
323 __unused internally, and to support compiling with Clang's -fblock
324 extension which uses __block.
326 * CVE-2012-4412 The strcoll implementation caches indices and rules for
327 large collation sequences to optimize multiple passes. This cache
328 computation may overflow for large collation sequences and may cause a
329 stack or buffer overflow. This is now fixed to use a slower algorithm
330 which does not use a cache if there is an integer overflow.
332 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
333 rules for large collation sequences to optimize multiple passes and falls
334 back to alloca if malloc fails, resulting in a possible stack overflow.
335 The implementation now falls back to an uncached collation sequence lookup
338 * CVE-2013-4788 The pointer guard used for pointer mangling was not
339 initialized for static applications resulting in the security feature
340 being disabled. The pointer guard is now correctly initialized to a
341 random value for static applications. Existing static applications need
342 to be recompiled to take advantage of the fix (bug 15754).
344 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
345 to the d_name member of struct dirent, or omit the terminating NUL
346 character. (Bugzilla #14699).
348 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
349 aligned_alloc functions could allocate too few bytes or corrupt the
350 heap when passed very large allocation size values (Bugzilla #15855,
353 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
354 for AF_INET6 has been fixed (Bugzilla #16072).
356 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
357 pap_CW, quz_PE, the_NP.
359 * Substantially revised locales: gd_GB, ht_HT
361 * The LC_ADDRESS field was updated to support country_car for almost all
364 * ISO 1427 definitions were updated.
366 * ISO 3166 definitions were updated.
368 * The localedef utility now supports --big-endian and --little-endian
369 command-line options to generate locales for a different system from that
370 for which the C library was built.
372 * Binary locale files now only depend on the endianness of the system for
373 which they are generated and not on other properties of that system. As a
374 consequence, binary files generated with new localedef may be incompatible
375 with old versions of the GNU C Library, and binary files generated with
376 old localedef may be incompatible with this version of the GNU C Library,
377 in the following circumstances:
379 + Locale files may be incompatible on m68k systems.
381 + Locale archive files (but not separate files for individual locales) may
382 be incompatible on systems where plain "char" is signed.
384 * The configure option --disable-versioning has been removed. Builds with
385 --disable-versioning had not worked for several years.
387 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
388 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
390 * SystemTap probes for malloc have been introduced.
392 * SystemTap probes for slow multiple precision fallback paths of
393 transcendental functions have been introduced.
395 * Support for powerpc64le has been added.
397 * The soft-float powerpc port now supports e500 processors.
399 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
401 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
402 set of header declarations that are enabled by default, even when other
403 feature test macros or compiler options such as -std=c99 would otherwise
404 disable some of those declarations.
406 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
407 conflict with POSIX. The libbsd-compat library (which was a dummy library
408 that did nothing) has also been removed.
410 * Preliminary documentation about Multi-Thread, Async-Signal and
411 Async-Cancel Safety has been added.
413 * Change of ABI data structures for s390 and s390x:
414 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
415 allow for future hardware extensions. All library functions that accept or
416 return these structures were versioned in order to provide backwards
417 compatibility with existing code. However, not all cases can be handled
418 with interface versioning. If an application embeds either structure into
419 another structure and that structure is passed to another compilation unit
420 which expects the newer larger-sized object then any access to the new
421 fields will result in undefined behaviour. Similarly any access to fields
422 that were moved by the enlarging of the structures will cause undefined
423 behaviour. To fix the undefined behaviour all objects that are part of the
424 final in-memory image must agree on the size of structures, and this may
425 require recompilation.
429 * The following bugs are resolved with this release:
431 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
432 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
433 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
434 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14952,
435 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003, 15006,
436 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062, 15078,
437 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234, 15283,
438 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336,
439 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381, 15394,
440 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424, 15426,
441 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485, 15488,
442 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577, 15583,
443 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711, 15755,
446 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
447 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
448 Distributions can re-enable building and using pt_chown via the new configure
449 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
450 considerable security risks and should only be used if the distribution
451 understands and accepts the risks.
453 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
456 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
457 fixed (Bugzilla #15330).
459 * Add support for calling C++11 thread_local object destructors on thread
460 and program exit. This needs compiler support for offloading C++11
461 destructor calls to glibc.
463 * Improved worst case performance of libm functions with double inputs and
466 * Support for priority inherited mutexes in pthread condition variables on
467 non-x86 architectures.
469 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
471 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
473 * Optimized string functions for ARM. Implemented by Will Newton and
476 * Optimized libm functions for SPARC. Implemented by David S. Miller.
478 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
481 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
482 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
484 * Added a benchmark framework to track performance of functions in glibc.
486 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
487 It is based on draft TS 18661 and currently enabled as a GNU extension.
489 * On Linux, the clock function now uses the clock_gettime system call
490 for improved precision, rather than old times system call.
492 * Added support for version-3 tz format files. This is needed when using
493 the tz database release 2013e or later, and affects a few unusual cases --
494 currently only TZ='America/Godthab' for time stamps after 2037.
496 * Added new API functions pthread_getattr_default_np and
497 pthread_setattr_default_np to get and set the default pthread
498 attributes of a process.
500 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
501 This may improve lock scaling of existing programs on TSX capable systems.
502 When the --enable-lock-elision=yes parameter is specified at configure
503 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
506 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
507 availability). Implemented by Ryan S. Arnold.
509 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
513 * The following bugs are resolved with this release:
515 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
516 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
517 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
518 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
519 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
520 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
521 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
522 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
523 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
524 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
525 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
526 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
527 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
528 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
529 14879, 14889, 14893, 14898, 14914.
531 * Optimization of memcpy for MIPS.
533 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
534 EMFILE has been fixed (Bugzilla #14889).
536 * The add-on ports collection is now distributed in the "ports" subdirectory
537 of the main GNU C Library distribution, rather than separately.
539 * Port to ARM AArch64 contributed by Linaro.
541 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
542 Optimized versions of memcpy, memset, and memcmp added for System z10 and
544 Implemented by Andreas Krebbel.
546 * The new function secure_getenv allows secure access to the environment,
547 returning NULL if running in a SUID/SGID process. This function replaces
548 the internal function __secure_getenv.
550 * SystemTap static probes have been added into the dynamic linker.
551 Implemented by Gary Benson.
553 * Optimizations of string functions strstr, strcasestr and memmem.
554 Implemented by Maxim Kuvyrkov.
556 * The minimum Linux kernel version that this version of the GNU C Library
557 can be used with is 2.6.16.
559 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
560 powerpc POWER7. Implemented by Will Schmidt.
562 * New configure option --disable-nscd builds the C library such that it
563 never attempts to contact the Name Service Caching Daemon (nscd).
564 New configure option --disable-build-nscd avoids building nscd itself;
565 this is the default if --disable-nscd is used.
567 * Improved support for cross-compilation, including cross-testing and
568 bootstrap builds without a previously built glibc.
570 * Several testsuite tests are now able to test multiple IFUNC variants of an
571 interface, rather than just testing the one that would be chooen by
574 * New configure options --with-bugurl and --with-pkgversion, for
575 distributors to use to embed their bug-reporting and package version
576 information in --help and --version output.
578 * The ttyname and ttyname_r functions on Linux now fall back to searching for
579 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
580 allows creation of chroots without the procfs mounted on /proc.
582 * The `crypt' function now fails if passed salt bytes that violate the
583 specification for those values. On Linux, the `crypt' function will
584 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
585 enabled, and fail on encrypted strings using the MD5 or DES algorithm
586 when the mode is enabled.
588 * The `clock_*' suite of functions (declared in <time.h>) is now available
589 directly in the main C library. Previously it was necessary to link with
590 -lrt to use these functions. This change has the effect that a
591 single-threaded program that uses a function such as `clock_gettime' (and
592 is not linked with -lrt) will no longer implicitly load the pthreads
593 library at runtime and so will not suffer the overheads associated with
594 multi-thread support in other code such as the C++ runtime library.
596 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
601 * The following bugs are resolved with this release:
603 174, 208, 350, 369, 411, 706, 766, 887, 2074, 2541, 2547, 2548, 2550,
604 2551, 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678,
605 3335, 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596,
606 4822, 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794,
607 6884, 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135,
608 10140, 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 11174,
609 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
610 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
611 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
612 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
613 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
614 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
615 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
616 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
617 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
618 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
619 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
620 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
621 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
622 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
623 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
624 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
627 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
628 configuring glibc with:
629 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
630 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
631 Implemented by H.J. Lu.
635 + define static_assert
637 + do not declare gets
639 + declare at_quick_exit and quick_exit also for ISO C11
641 + aligned_alloc. NB: The code is deliberately allows the size parameter
642 to not be a multiple of the alignment. This is a moronic requirement
643 in the standard but it is only a requirement on the caller, not the
648 + uchar.h support added
650 + CMPLX, CMPLXF, CMPLXL added
652 Implemented by Ulrich Drepper.
654 * Support for the IA-64 has been moved to ports.
656 * Remove support for anything but ELF binary format
658 * Checking versions of poll, ppoll added.
659 Implemented by Ulrich Drepper.
661 * More generic and 64-bit performance optimizations to math functions.
662 Implemented by Ulrich Drepper.
664 * New configure option --enable-obsolete-rpc makes the deprecated RPC
665 headers and functions available at compile time as they were before
666 version 2.14. This option will be removed at some time in the future
667 after the TI-RPC library becomes fully sufficient for the needs of
668 existing applications.
670 * Compatibility code for Linux kernel versions before 2.4 has been removed.
671 Note that glibc is not expected to work with any Linux kernel version
674 * New header <sys/auxv.h> and function getauxval allowing easy access to
675 the AT_* key-value pairs passed from the Linux kernel. The header also
676 defines the HWCAP_* bits associated with the AT_HWCAP key.
678 * New locales: mag_IN
680 * New configure option --enable-systemtap builds SystemTap static probes
681 into libc for setjmp and longjmp and into libpthread for various operations.
682 So far the setjmp/longjmp probes and some of the libpthread probes are
683 provided only for i*86 and x86_64.
684 Implemented by Roland McGrath and Rayson Ho.
686 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
688 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
691 * More optimized functions for SPARC. Implemented by David S. Miller.
693 * Improved support for cross-compilation, especially bootstrap builds
694 without a previously built glibc.
696 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
697 Chris Metcalf from Tilera.
699 * Support for the old ARM ABI has been removed from ports. Only the EABI is
700 now supported for ARM processors.
702 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
703 as the name of the dynamic linker, to distinguish it from the
704 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
706 * Support for CRIS has been removed from ports.
708 * A new class of installed header has been documented for low-level
709 platform-specific functionality. PowerPC added the first instance with a
710 function to provide time base register access. Contributed by Tulio
711 Magno Quites Machado Filho.
713 * ix86 configurations now install header files that are consistent with
714 what x86-64 configurations install. These same header files can be used
715 for -m32, -m64, or -mx32 builds.
716 Contributed by H.J. Lu.
718 * Math library bug fixes. A thorough audit of all open math library bugs was
719 conducted by Joseph Myers. Significant progress was made on many math
720 library bugs resulting in more accurate exceptions and function results.
721 Many thanks to all those that contributed including Andreas Jaeger for his
722 patch review and work on the x87 trigonometric instruction issues.
724 * Timezone data is no longer installed. Timezone-related binaries and scripts
725 will continue to be installed. Users should obtain their timezone data from
726 their distribution provider or from the tzdata package at
727 <ftp://munnari.oz.au/pub/>.
731 * The following bugs are resolved with this release:
733 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
734 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
735 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
736 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
737 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
738 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
739 13484, 13506, 13515, 13523, 13524, 13538, 13540
741 * New program pldd to list loaded object of a process
742 Implemented by Ulrich Drepper.
744 * Add nss_db support back to glibc. No more dependency on Berkeley db
745 and support for initgroups lookups.
746 Implemented by Ulrich Drepper.
748 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
749 Contributed by HJ Lu.
751 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
752 Contributed by HJ Lu.
754 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
755 on x86-32 and x86-64.
756 Contributed by Liubov Dmitrieva.
758 * Optimized strchr and strrchr for SSE on x86-32.
759 Contributed by Liubov Dmitrieva.
761 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
762 for x86-64 and x86-32.
763 Contributed by Liubov Dmitrieva.
765 * New interfaces: scandirat, scandirat64
766 Implemented by Ulrich Drepper.
768 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
769 Implemented by Ulrich Drepper.
771 * nscd now also caches the netgroup database.
772 Implemented by Ulrich Drepper.
774 * Integrate libm with gcc's -ffinite-math-only option.
775 Implemented by Ulrich Drepper.
777 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
778 to math functions. Implemented by Ulrich Drepper.
780 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
781 Implemented by Ulrich Drepper.
783 * New Linux interfaces: process_vm_readv, process_vm_writev
785 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
786 Implemented by Ulrich Drepper.
788 * Optimized nearbyint and strcasecmp for PPC.
789 Implemented by Adhemerval Zanella.
791 * New locales: bho_IN, unm_US, es_CU, ta_LK
795 * The following bugs are resolved with this release:
797 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
798 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
799 11781, 11799, 11820, 11837, 11857, 11869, 11892, 11895, 11901, 11945,
800 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
801 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
802 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
803 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
804 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
805 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
806 12795, 12811, 12813, 12814, 12841
808 * The RPC implementation in libc is obsoleted. Old programs keep working
809 but new programs cannot be linked with the routines in libc anymore.
810 Programs in need of RPC functionality must be linked against TI-RPC.
811 The TI-RPC implementation is IPv6 enabled and there are other benefits.
813 Visible changes of this change include (obviously) the inability to link
814 programs using RPC functions without referencing the TI-RPC library and the
815 removal of the RPC headers from the glibc headers.
816 Implemented by Ulrich Drepper.
818 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
819 syncfs, setns, sendmmsg
821 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
822 yue_HK, lij_IT, mhr_RU
824 * New encodings: CP770, CP771, CP772, CP773, CP774
826 * New program sotruss to trace calls through PLTs
827 Implemented by Ulrich Drepper.
829 * The malloc hook implementation is marked deprecated and will be removed
830 from the default implementation in the next version. The design never
831 worked ever since the introduction of threads. Even programs which do
832 not create threads themselves can use multiple threads created internally.
836 * The following bugs are resolved with this release:
838 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
839 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
840 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
841 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
844 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
846 * POWER7 optimizations: memset, memcmp, strncmp
848 * New optimized string functions for x86-64: strnlen (SSE2),
849 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
850 Implemented by Ulrich Drepper.
854 * The following bugs are resolved with this release:
856 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
857 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
858 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
859 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
860 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
861 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
862 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
863 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
865 * New interfaces: pthread_getname_np, pthread_setname_np
867 * New Linux interface: recvmmsg
869 * STT_GNU_IFUNC implemented for Sparc by David Miller.
871 * The dynamic linker now recognizes supported ABI versions from the
872 EI_ABIVERSION field in the ELF header.
873 Implemented by Ulrich Drepper.
875 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
876 will not be used to fill in password fields in the passwd.byname replies.
877 Instead it is used to synthesize the shadow.byname table, should it be
878 missing. This is a useful mode in some installations involving Solaris.
879 Implemented by Ulrich Drepper.
881 * New locales: kok_IN, sq_MK, cv_RU
885 * The following bugs are resolved with this release:
887 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
888 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
889 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
890 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
891 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
892 10789, 10817, 10823, 10840, 10847
894 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
896 Implemented by Ulrich Drepper.
898 * Checking version of longjmp added that fails if an uninitialized stack
899 frame would be created. Implemented by Ulrich Drepper.
901 * STT_GNU_IFUNC is now supported in static executables.
902 Implemented by H.J. Lu.
904 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
906 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
907 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
908 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
909 Contributed by H.J. Lu.
911 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
912 Implemented by Ulrich Drepper.
914 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
916 Contributed by H.J. Lu.
918 * Support for fma instruction in AVX on x86-64.
919 Implemented by H.J. Lu and Ulrich Drepper.
921 * AVX support in x86-64 auditing support in ld.so.
922 Implemented by H.J. Lu.
924 * STB_GNU_UNIQUE support added.
925 Implemented by Ulrich Drepper.
927 * Implement second fallback mode for optimized DNS lookup for even more
928 broken environments. If two requests from the same port are not
929 handled correctly close the socket and open a new one before sending
930 the second request. The 'single-request-reopen' option in /etc/resolv.conf
931 can be used to select this mode right away, instead of rediscovering the
932 necessity is every process again.
933 Implemented by Ulrich Drepper.
935 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
936 Implemented by Adam Tkac.
938 * Optimized iconv conversions for S390x.
939 Implemented by Andreas Krebbel.
941 * Using condvars with PI mutexes is now more efficient due to kernel
942 support for requeueing to PI futexes. NPTL support added for x86-64.
943 Implemented by Ulrich Drepper.
945 * New locales: ps_AF, my_MM
949 * The following bugs are resolved with this release:
951 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
952 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
953 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
954 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
955 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
957 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
958 Implemented by Ulrich Drepper.
960 * New Linux interfaces: accept4, fallocate, fallocate64.
961 Implemented by Ulrich Drepper.
963 * Correct declarations of string function when used in C++ code. This
964 could lead to compile errors for invalid C++ code.
966 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
969 * New POSIX 2008 interface: psiginfo
970 Implemented by Ulrich Drepper.
972 * New ISO C++1x interfaces: quick_exit, at_quick_exit
973 Implemented by Ulrich Drepper.
975 * Support for selecting between multiple function definitions at runtime
976 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
978 * The libcrypt library can now use the hash function implementations in
979 NSS. Implemented by Ulrich Drepper.
981 * The malloc implementation can be compiled to be less memory efficient
982 but higher performing in multi-threaded programs.
983 Implemented by Ulrich Drepper.
985 * New locales: nan_TW@latin, ks_IN
987 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
988 Implemented by Ulrich Drepper.
990 * Extended printf hook support. It is possible to use user-defined types
991 and extend existing format specifiers.
992 Implemented by Ulrich Drepper.
994 * Handling for group shadow files has been added.
995 Implemented by Ulrich Drepper.
997 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
998 servers (the case, e.g., for some people using the built-in DNS
999 server in ADSL modems/routers). There is a once-per-process timeout
1000 in case of a broken server. To avoid it, users can run nscd or put
1001 'options single-request' in /etc/resolv.conf.
1002 Implemented by Ulrich Drepper.
1006 * The following bugs are resolved with this release:
1008 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1009 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1010 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1011 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1012 6968, 6974, 6980, 6995, 7008, 7009, 7029
1014 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1015 up at the same time. Implemented by Ulrich Drepper.
1017 * TLS descriptors for LD and GD on x86 and x86-64.
1018 Implemented by Alexandre Oliva.
1020 * getaddrinfo now handles DCCP and UDPlite.
1021 Implemented by Ulrich Drepper.
1023 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1024 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1025 Implemented by Ulrich Drepper.
1027 * New implementation of memmem, strstr, and strcasestr which is O(n).
1028 Implemented by Eric Blake.
1030 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1032 * Implement "e" option for popen to open file descriptor with the
1033 close-on-exec flag set. Implemented by Ulrich Drepper.
1035 * Implement "b" mode for fmemopen. In this mode writes writes don't
1036 implicitly add a NUL byte and seeks from the end of the buffer really
1037 use the buffer end, not the string length as the basis.
1038 Implemented by Ulrich Drepper.
1040 * Many functions, exported and internal, now atomically set the close-on-exec
1041 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1043 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1045 Implemented by Pravin Satpute.
1047 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1051 * The following bugs are resolved with this release:
1053 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1054 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1055 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1056 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1057 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1058 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1059 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1061 * New locales: bo_CN, bo_IN, shs_CA.
1063 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1065 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1066 Implemented by Pravin Satpute.
1068 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1070 * nscd caches now all timeouts for DNS entries
1071 Implemented by Ulrich Drepper.
1073 * nscd is more efficient and wakes up less often.
1074 Implemented by Ulrich Drepper.
1076 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1077 vdprintf, and obstack_vprintf.
1078 Implemented by Jakub Jelinek.
1080 * Faster memset for x86-64.
1081 Implemented by Harsha Jagasia and H.J. Lu.
1083 * Faster memcpy on x86.
1084 Implemented by Ulrich Drepper.
1086 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1087 Implemented by Ulrich Drepper.
1089 * Faster sqrt and sqrtf implemention for some PPC variants.
1090 Implemented by Steven Munroe.
1094 * The following bugs are resolved with this release:
1096 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1097 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1098 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1099 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1100 5071, 5103, 5104, 5112, 5113, 5184, 5186
1102 * More checking functions: fread, fread_unlocked, open*, mq_open.
1103 Implemented by Jakub Jelinek and Ulrich Drepper.
1105 * Extend fortification to C++. Implemented by Jakub Jelinek.
1107 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1108 by not recognizing 'a' as a modifier when those specs are requested.
1109 Implemented by Jakub Jelinek.
1111 * PPC optimizations to math and string functions.
1112 Implemented by Steven Munroe.
1114 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1115 options to be passed. Implemented by Ulrich Drepper.
1117 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1119 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1120 Implemented by Ulrich Drepper.
1122 * Handle private futexes in the NPTL implementation.
1123 Implemented by Jakub Jelinek and Ulrich Drepper.
1125 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1126 Implemented by Roland McGrath and Ulrich Drepper.
1128 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1130 * SHA-256 and SHA-512 based password encryption.
1131 Implemented by Ulrich Drepper.
1133 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1134 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1137 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1138 Implemented by Ulrich Drepper.
1142 * The following bugs are resolved with this release:
1144 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1145 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1146 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1147 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1148 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1149 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1150 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1153 * New Linux interfaces: epoll_pwait, sched_getcpu.
1155 * New generic interfaces: strerror_l.
1157 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1161 * The following bugs are resolved with this release:
1163 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1164 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1165 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1166 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1167 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1168 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1169 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1170 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1171 3225, 3251, 3252, 3253, 3273
1173 * For Linux, the sorting of addresses returned by getaddrinfo now also
1174 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1175 Implemented by Ulrich Drepper.
1177 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1178 Implemented by Ulrich Drepper.
1180 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1182 * New iconv module for MIK. Contributed by Alexander Shopov.
1184 * For sites with broken group and/or passwd database, the auto-propagate
1185 option of nscd can prevent creating ID lookup entries from the results
1186 of a name lookup and vice versa. This usually is no problem but some
1187 site might have problems with the default behavior.
1188 Implemented by Ulrich Drepper.
1190 * Iterating over entire database in NIS can be slow. With the
1191 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1192 to trade time for memory. The entire database will be read at once.
1193 Implemented by Ulrich Drepper.
1195 * The interfaces introduced in RFC 3542 have been implemented by
1198 * Support for the new ELF hash table format was added by Ulrich Drepper.
1200 * Support for priority inheritance mutexes added by Jakub Jelinek and
1203 * Support for priority protected mutexes added by Jakub Jelinek.
1205 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1206 or_IN, csb_PL, fy_NL, sr_ME.
1210 * More overflow detection functions.
1212 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1213 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1215 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1216 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1217 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1218 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1219 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1220 by Masahide Washizawa.
1222 * It is now possible to install audit libraries for the dynamic linker using
1223 LD_AUDIT. Implemented by Ulrich Drepper.
1225 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1226 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1227 For a libc and libpthread that works well on Linux 2.4 kernels, we
1228 recommend using the stable 2.3 branch.
1230 * The new function open_wmemstream acts like open_memstream,
1231 but uses a wchar_t wide character buffer.
1233 * The new function ppoll is an improved version of poll, similar to pselect.
1235 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1236 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1237 renameat, unlinkat, linkat, symlinkat, readlinkat.
1239 * New Linux kernel system calls: unshare,
1240 inotify_init, inotify_add_watch, inotify_rm_watch.
1242 * The euidaccess function is now also known by the alias eaccess,
1243 for compatibility with some other systems.
1245 * Timezone data updated to 2006b version.
1249 * The following bugs are resolved with this release:
1251 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1252 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1253 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1254 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1255 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1256 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1258 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1260 * As of this release, GCC 4 can be used to compile the C Library.
1262 * Timezone data updated to 2005m version.
1266 * The following bugs are resolved with this release:
1268 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1269 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1270 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1271 777, 787, 821, 822, 823, 825
1273 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1277 * Support for RFC 3678. Real implementations exist only for Linux so far.
1278 Implemented by Ulrich Drepper.
1280 * nscd can now cache entries persistently. Expiring entries are reloaded.
1281 For speedups the cache can be shared in memory with client processes.
1282 Implemented by Ulrich Drepper.
1284 * nscd can now perform SELinux checks.
1285 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1287 * getaddrinfo queries are now cached. Canonical name lookup is performed
1289 Implemented by Ulrich Drepper.
1291 * The nothrow function attribute is used when headers are used by gcc when
1292 compiling C code. This can avoid significant amounts of exception
1295 * The malloc functions perform more error checking and are stricter when
1296 it comes to reacting on errors. The default action is to terminate
1297 the process after showing an error message. Implemented by Ulrich Drepper.
1299 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1300 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1302 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1303 namespaces using the new function dlmopen(). This feature is of course,
1304 like most other dynamic loading functionality, not available in statically
1305 linked applications. Implemented by Ulrich Drepper.
1307 * Low-overhead boundary checking variants of string and some stdio functions
1308 were added. These are to be used in conjunction with a gcc patch by
1309 Jakub Jelinek which adds calls to these functions if possible.
1310 Implemented by Jakub Jelinek and Ulrich Drepper.
1312 * Old code for several operating systems and machine architectures that
1313 have not been in working condition in a long time have been removed from
1314 the main source tree maintained by the GNU C Library's maintainers.
1315 These files are now reside in the separate `ports' source module
1316 that is usable as an add-on when building the library.
1320 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1321 interrogate the dynamic linker, compatible with the Solaris interface.
1323 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1324 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1326 * getifaddrs now uses the netlink interface on Linux to get its information.
1327 Implemented by Thorsten Kukuk.
1329 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1330 Implemented by Ulrich Drepper.
1332 * support for non-executable stacks on x86 has been added. Changes mostly
1335 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1338 * getaddrinfo now performs destination address selection according to
1343 * Thread-safe interfaces for many functions that access locale data
1344 were added in version 2.3, but these features were omitted from NEWS.
1345 Many functions have variants with an `_l' suffix that take a `locale_t'
1346 object as a parameter rather than consulting the current locale.
1347 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1348 create and maintain `locale_t' objects. Additionally, the new function
1349 `uselocale' sets "the current locale" (as used by functions not so
1350 parameterized) set for an individual thread. These features were added
1351 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1353 * The functions getresuid, getresgid, setresuid, and setresgid, which
1354 have long been available on Linux, are now declared in <unistd.h>
1355 and are now also available on the Hurd.
1357 * ELF thread-local storage support (TLS) now works on x86-64.
1359 * The new dynamic string token $LIB is expanded in shared library names.
1360 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1362 * Aldy Hernandez contributed complete software floating point support for
1363 PowerPC machines with no FPU.
1365 * fexecve is implemented on Linux.
1367 * The `btowc' function should work at least twice as fast due to
1368 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1370 * With approriate thread add-ons cancelable functions are now implemented
1371 in libc.so as well. No need to call the function in libpthread. This
1372 change allowed to finally disable the incorrect and expensive handling
1373 of weak definition in ld.so.
1375 * Yet more PLT entries in libc.so have been removed. We finally arrived
1376 at the bare minimum. Startup times improved appropriately.
1378 * Support for the new Linux/x86 system call interface was added. The
1379 AT_SYSINFO auxiliary vector entry is recognized and handled.
1383 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1386 * iconv (the program and the interface) now accepts empty names (excluding
1387 options like //TRANSLIT) to mean "use charset of current locale".
1389 * localedef can now transliterate characters in strings which are not in
1390 the provided charmap. The information from the input locale is used.
1392 * Prelinking support was added for ELF targets. This requires additional
1393 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1395 * Read-only stdio streams now use mmap to speed up operation by eliminating
1396 copying and buffer underflows. To use add 'm' to the mode string of
1397 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1399 * The malloc functions were completely rewritten by Wolfram Gloger based
1400 on Doug Lea's malloc-2.7.0.c.
1402 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1403 implementation of regex.
1405 * Bruno Haible upgraded the iconv and locale implementation to support
1408 * Contents of the LC_* and LANG environment variables in the CEN style are
1409 not recognized anymore. It never was used. Change by Ulrich Drepper.
1411 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1412 thread-local storage (TLS) ABI on some platforms.
1413 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1415 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1416 EUC-JISX0213, and TSCII.
1418 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1419 BSD-compatible interface for getting all network interface addresses.
1420 Implementation for IPv4 by Roland McGrath.
1422 * Loading of locale data is faster due to the introduction of a locale
1423 archive. Implemented by Roland McGrath and Ulrich Drepper.
1425 * Startup times are significantly reduced by not using exported functions
1426 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1429 * Steven Munroe contributed a port to PowerPC64/Linux.
1433 * The Hurd now uses the GNU libio implementation of stdio rather than the
1434 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1436 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1437 with the same behavior as the Linux system call of the same name.
1441 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1442 128-bit long double format.
1444 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1445 IBM1161, and IBM1162 charsets.
1447 * Andreas Jaeger contributed a port to x86-64/Linux.
1449 * Peter Bruin contributed a port to PowerPC/Hurd.
1451 * libc functions using I/O streams now can handle wide-oriented streams
1454 * optimizations in the dynamic linker. Binaries created by recent binutils
1455 versions start up quicker due to reduced time spent on relocations.
1457 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1461 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1462 asinh, atanh, j0 for the 128-bit long double format.
1464 * Bruno Haible updated all the code handling Unicode in some form to
1465 support Unicode 3.1.
1467 * Speed of regex for single-byte locales is back to previous levels.
1468 Patch by Isamu Hasegawa.
1470 * Alpha, SPARC, and IA-64 now also using floating stacks.
1472 * Startup time of internationalized applications greatly improved through
1473 iconv cache. Use iconvconfig to generate the cache file.
1474 Contributed by Ulrich Drepper.
1476 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1477 severe performance problems. Patch by David Mosberger.
1479 * The Hurd port got a lot more functionality like AIO, various stdio
1480 extensions, etc. Mainly done by Roland McGrath.
1482 * mtrace can now lookup symbols in shared libraries.
1486 * Intel's IA-64 math library is largely integrated. It provides fast and
1487 accurate implementatations for most basic and standard math functions
1488 in float, double, and long double format.
1490 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1491 and asin for the 96-bit long double format and asin, log, tan for the
1492 128-bit long double format.
1494 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1495 The basic double functions exist today. Contributed by Abraham Ziv
1496 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1497 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1499 * An asynchronous name lookup library was added. The interface is designed
1500 after POSIX AIO. The proposal was circulated beforehand to get comments.
1501 No negative ones came in. Implemented by Ulrich Drepper.
1503 * Port to S390/64bit contributed by Martin Schwidefsky
1504 <schwidefsky@de.ibm.com>.
1506 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1507 of functions for Linux/IA-64.
1509 * The RPC code is now thread safe. Threads can now use the same service
1510 of different services at the same time. Patch by Eric Norum
1511 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1513 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1514 family of functions for Linux/S390.
1516 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1517 of functions for Linux/x86.
1519 * Port to Linux/CRIS contributed by Axis Communications.
1523 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1524 we can now check for namespace violations and missing declarations. The
1525 result is that almost all headers are now Unix-compliant (as defined in
1526 the upcoming XPG6). The negative side is that some programs might need
1527 corrections, too, if they depend on the incorrect form of the headers in
1528 previous versions which defined too many symbols and included too many
1531 * regex now handles multibyte character sets correctly.
1532 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1534 * iconv (the program) does now conform to the upcoming XPG6 and handles
1535 charmaps. Instead of the charset names the path of charmaps can be
1536 provided and the conversion happens based on this data.
1537 Contributed by Ulrich Drepper.
1539 * The locale program now provides detailed information about the installed
1544 only lists the names of the supported locales
1548 provides details such as country, language, and codeset name.
1549 Contributed by Ulrich Drepper.
1553 * The gencat program now parses the input file according to the charset
1554 selected by the LC_CTYPE category. This is important for stateful
1555 character sets. To make generating catalogs easier there is a way
1556 to overwrite the charset selected by the locale: before the first
1557 message or $ quote line the catalog can contain a line like
1559 $ codeset=ISO-8859-2
1561 to select the charset (ISO-8859-2 in this case).
1563 Implemented by Shinya Hanataka and Ulrich Drepper.
1565 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1566 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1567 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1569 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1570 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1572 * The LANGUAGE environment variable is now ignored unless the locale is
1573 changed from the default "C" locale.
1575 * The usual bug fixes.
1579 * Greg McGary added runtime support for bounds checking using gcc's
1580 new -fbounded-pointers option. ix86 target is complete. PowerPC
1583 * Thorsten Kukuk added secure mode support to nscd.
1585 * The Berkeley db libraries have been removed.
1587 Related, the nss_db module is now in a separate package since it
1588 obviously requires a database library being available.
1590 * Wide character I/O streams implemented by Ulrich Drepper.
1592 * Functions from the extended socket API added by Ulrich Drepper.
1594 * Functions feenableexcept and fedisableexcept to control the
1595 behaviour of individual exceptions have been added by Andreas Jaeger.
1597 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1599 * The resolver code has been updated from bind 8.2.3-T5B which supports
1600 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1603 This change could in some situations effect backward compatibility. Since
1604 now `_res' is a thread-local instead of a global variable, modifying it
1605 in one thread does not have any effect in other threads.
1607 The resolver library was also extended to allow IPv6 as the transport
1608 protocol for the requests. This work was done by Stig Venaas.
1610 * Compatibility code for K&R C compilers has been removed from the
1611 header files. A ISO C compiler is needed to use the library
1612 (conforming to either C89 or C99 standard).
1614 * Complete rewrite of the localedef program to support multibyte character
1615 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1616 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1617 Implemented by Ulrich Drepper.
1619 Bruno Haible significantly improved the generation and use of the data
1620 structures for the wide character tables.
1622 * Plural handling in gettext implemented by Ulrich Drepper.
1624 * The utmp daemon has been removed.
1626 * The port to MIPS-Linux has been finished by Andreas Jaeger.
1628 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
1631 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
1633 * POSIX barriers implemented by Kaz Kylheku.
1635 * POSIX spawn function family implemented by Ulrich Drepper.
1637 * POSIX spinlocks are now available.
1639 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
1641 * the configure option --enable-kernel=X.Y.Z allows to strip out
1642 compatibility for kernel versions before X.Y.Z. This is currently only
1643 implemented for Linux.
1645 * the sockaddr_in6 structure changed. The IPv6 working group added a new
1646 field sin6_scope_id. This means that all programs using IPv6 should be
1647 recompiled. Don't expect binary compatibility with previous glibc
1650 * various conversion modules for IBM character sets contributed by
1653 * IA-64 port by Jes Sorensen and HJ Lu.
1667 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
1669 * New xdr functions are added; some rpc functions are now 64bit clean.
1671 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
1673 * Fixed known incompatibilities with glibc 2.0.
1675 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
1677 * Optimized a number of functions (especially the ELF dynamic loader).
1679 * Update timezone data files.
1681 * lots of charmaps corrections
1683 * some new locale definitions and charmaps
1688 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
1689 conform to POSIX member type requirements. Symbol versions have been
1690 adjusted as needed within the library, and for direct use by applications,
1691 but there is potential for problems if third-party libraries use
1692 struct timeval as part of their interface. This does not present
1693 a problem for X and other "essential" system libraries.
1695 * An additional locale model to support C++ Standard Library locale
1696 model and probably more was implemented by Ulrich Drepper.
1698 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
1701 * Miles Bader provided the `argp' function family to support hierachical
1702 command line argument parsing, layered on top of getopt.
1704 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
1706 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
1709 * scanf recognizes the %a and %A format for scanning floating point numbers.
1711 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
1712 information and interfaces for the available integer types.
1714 * about 130 new math functions were added to implement the ISO C9x math
1717 * the new header <complex.h> contains definitions of the complex math
1718 functions from ISO C 9X.
1720 * the new header <tgmath.h> defines generic macros to use complex or
1721 real valued functions.
1723 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
1725 * Andreas Jaeger provided a test suite for the math library.
1727 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
1729 * Ulrich Drepper added character set conversion functions (iconv).
1731 * Optimized string functions have been added.
1733 * The localedata addon is now part of glibc.
1735 * An implementation of profiling shared libraries was added by Ulrich Drepper.
1737 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
1738 daemon for NSS (nscd).
1740 Missing a better place here are some numbers on improvements. Under
1741 Linux 2.1.125 un-tar-ing the kernel sources takes
1745 using local files 12.19s 6.88s 22.91s
1747 using NIS 13.92s 8.91s 26.34s
1749 using NIS & nscd 10.37s 7.34s 25.30s
1751 using NIS+ 27.57s 30.37s 640.46s
1753 using NIS+ & nscd 10.25s 7.83s 26.51s
1755 using NIS & old nscd [1] 13.83s 8.32s 29.60s
1757 Keep in mind that non-namelookup related operations dominate above times.
1758 It was just a common complain that using NIS+ unpacking the kernel is
1761 [1] The old nscd implementation is not available anymore since it was
1762 distributed with glibc up to version 2.0.98 and thus is now replaced.
1764 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
1766 * Mark Kettenis provided a Hesiod NSS module.
1768 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
1769 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
1771 * rcmd can now handle netgroups (Dick Streefland).
1773 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
1776 * Support for the IPv6 protocol has been added to the socket API, as per the
1777 latest draft standards.
1779 * Support for Linux 2.2 has been added.
1781 * Interface changes relative to the latest 2.0.x release:
1782 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1783 addseverity NEW: Unix98
1784 alphasort64 NEW: LFS
1785 argp_err_exit_status NEW: argp, GNU ext
1786 argp_error NEW: argp, GNU ext
1787 argp_failure NEW: argp, GNU ext
1788 argp_help NEW: argp, GNU ext
1789 argp_parse NEW: argp, GNU ext
1790 argp_program_bug_address NEW: argp, GNU ext
1791 argp_program_version NEW: argp, GNU ext
1792 argp_program_version_hook NEW: argp, GNU ext
1793 argp_state_help NEW: argp, GNU ext
1794 argp_usage NEW: argp, GNU ext
1795 authdes_create NEW: Secure RPC
1796 authdes_getucred NEW: Secure RPC
1797 authdes_pk_create NEW: Secure RPC
1798 backtrace NEW: GNU ext.
1799 backtrace_symbols NEW: GNU ext.
1800 backtrace_symbols_fd NEW: GNU ext.
1802 cacosf NEW: ISO C 9x
1803 cacosh NEW: ISO C 9x
1804 cacoshf NEW: ISO C 9x
1805 cacoshl NEW: ISO C 9x
1806 cacosl NEW: ISO C 9x
1813 casinf NEW: ISO C 9x
1814 casinh NEW: ISO C 9x
1815 casinhf NEW: ISO C 9x
1816 casinhl NEW: ISO C 9x
1817 casinl NEW: ISO C 9x
1819 catanf NEW: ISO C 9x
1820 catanh NEW: ISO C 9x
1821 catanhf NEW: ISO C 9x
1822 catanhl NEW: ISO C 9x
1823 catanl NEW: ISO C 9x
1824 cbc_crypt NEW: Secure RPC
1828 ccoshf NEW: ISO C 9x
1829 ccoshl NEW: ISO C 9x
1835 cimagf NEW: ISO C 9x
1836 cimagl NEW: ISO C 9x
1837 clearerr_locked REMOVED
1838 clntunix_create NEW: sunrpc ext
1840 clog10 NEW: ISO C 9x
1841 clog10f NEW: ISO C 9x
1842 clog10l NEW: ISO C 9x
1852 cprojf NEW: ISO C 9x
1853 cprojl NEW: ISO C 9x
1855 crealf NEW: ISO C 9x
1856 creall NEW: ISO C 9x
1861 csinhf NEW: ISO C 9x
1862 csinhl NEW: ISO C 9x
1865 csqrtf NEW: ISO C 9x
1866 csqrtl NEW: ISO C 9x
1870 ctanhf NEW: ISO C 9x
1871 ctanhl NEW: ISO C 9x
1873 des_setparity NEW: Secure RPC
1874 ecb_crypt NEW: Secure RPC
1875 endutxent NEW: Unix98
1877 exp10f NEW: ISO C 9x
1878 exp10l NEW: ISO C 9x
1882 fattach NEW: STREAMS
1883 fdetach NEW: STREAMS
1887 feclearexcept NEW: ISO C 9x
1888 fegetenv NEW: ISO C 9x
1889 fegetexceptflag NEW: ISO C 9x
1890 fegetround NEW: ISO C 9x
1891 feholdexcept NEW: ISO C 9x
1893 feraiseexcept NEW: ISO C 9x
1894 ferror_locked REMOVED
1895 fesetenv NEW: ISO C 9x
1896 fesetexceptflag NEW: ISO C 9x
1897 fesetround NEW: ISO C 9x
1898 fetestexcept NEW: ISO C 9x
1899 feupdateenv NEW: ISO C 9x
1900 fflush_locked REMOVED
1904 fgets_unlocked NEW: GNU ext.
1905 fileno_locked REMOVED
1917 fputc_locked REMOVED
1918 fputs_unlocked NEW: GNU ext.
1919 fread_unlocked NEW: GNU ext.
1924 fstatvfs NEW: Unix98
1928 ftruncate64 NEW: LFS
1930 fwrite_unlocked NEW: GNU ext.
1931 gai_strerror NEW: IPv6
1935 getchar_locked REMOVED
1937 getdate_err NEW: Unix98
1938 getdate_r NEW: GNU ext.
1940 getnameinfo NEW: IPv6
1941 getnetname NEW: Secure RPC
1942 getpmsg NEW: STREAMS
1943 getpt NEW: Unix98 PTY
1944 getrlimit64 NEW: LFS
1945 getutxent NEW: Unix98
1946 getutxid NEW: Unix98
1947 getutxline NEW: Unix98
1948 glob64 NEW: GNU ext.
1949 globfree64 NEW: GNU ext.
1950 gnu_get_libc_release NEW: GNU ext.
1951 gnu_get_libc_version NEW: GNU ext.
1952 grantpt NEW: Unix98 PTY
1953 host2netname NEW: Secure RPC
1955 iconv_close NEW: iconv
1956 iconv_open NEW: iconv
1957 if_freenameindex NEW: IPv6
1958 if_indextoname NEW: IPv6
1959 if_nameindex NEW: IPv6
1960 if_nametoindex NEW: IPv6
1961 in6addr_any NEW: IPv6
1962 in6addr_loopback NEW: IPv6
1963 inet6_isipv4mapped NEW: IPv6
1964 isastream NEW: STREAMS
1965 iswblank NEW: GNU ext.
1966 key_decryptsession NEW: Secure RPC
1967 key_decryptsession_pk NEW: Secure RPC
1968 key_encryptsession NEW: Secure RPC
1969 key_encryptsession_pk NEW: Secure RPC
1970 key_gendes NEW: Secure RPC
1971 key_get_conv NEW: Secure RPC
1972 key_secretkey_is_set NEW: Secure RPC
1973 key_setnet NEW: Secure RPC
1974 key_setsecret NEW: Secure RPC
1975 llrint NEW: ISO C 9x
1976 llrintf NEW: ISO C 9x
1977 llrintl NEW: ISO C 9x
1978 llround NEW: ISO C 9x
1979 llroundf NEW: ISO C 9x
1980 llroundl NEW: ISO C 9x
1985 lrintf NEW: ISO C 9x
1986 lrintl NEW: ISO C 9x
1987 lround NEW: ISO C 9x
1988 lroundf NEW: ISO C 9x
1989 lroundl NEW: ISO C 9x
1991 makecontext NEW: Unix98
1992 mempcpy NEW: GNU ext.
1995 modify_ldt NEW: kernel
1999 nearbyint NEW: ISO C 9x
2000 nearbyintf NEW: ISO C 9x
2001 nearbyintl NEW: ISO C 9x
2002 netname2host NEW: Secure RPC
2003 netname2user NEW: Secure RPC
2004 nexttoward NEW: ISO C 9x
2005 nexttowardf NEW: ISO C 9x
2006 nexttowardl NEW: ISO C 9x
2010 passwd2des NEW: Secure RPC
2012 pow10f NEW: GNU ext.
2013 pow10l NEW: GNU ext.
2016 printf_size NEW: GNU ext.
2017 printf_size_info NEW: GNU ext.
2018 profil_counter REMOVED
2019 pthread_mutexattr_getkind_np REPLACED
2020 pthread_mutexattr_setkind_np REPLACED
2021 ptsname NEW: Unix98 PTY
2022 ptsname_r NEW: Unix98 PTY
2024 putchar_locked REMOVED
2025 putgrent NEW: GNU ext.
2027 putpmsg NEW: STREAMS
2028 pututxline NEW: Unix98
2032 readdir64_r NEW: LFS
2033 remquo NEW: ISO C 9x
2034 remquof NEW: ISO C 9x
2035 remquol NEW: ISO C 9x
2037 roundf NEW: ISO C 9x
2038 roundl NEW: ISO C 9x
2040 scalbln NEW: ISO C 9x
2041 scalblnf NEW: ISO C 9x
2042 scalblnl NEW: ISO C 9x
2044 sendfile NEW: kernel
2045 setcontext NEW: Unix98
2046 setrlimit64 NEW: LFS
2047 setutxent NEW: Unix98
2049 sigignore NEW: Unix98
2050 sigqueue NEW: POSIX.1b
2051 sigrelse NEW: Unix98
2052 sigset NEW: POSIX.1b
2053 sigtimedwait NEW: POSIX.1b
2054 sigwaitinfo NEW: POSIX.1b
2055 sincos NEW: GNU ext.
2056 sincosf NEW: GNU ext.
2057 sincosl NEW: GNU ext.
2061 strcasestr NEW: GNU ext.
2062 strtoimax NEW: ISO C 9x
2063 strtoumax NEW: ISO C 9x
2064 strverscmp NEW: GNU ext.
2065 svcauthdes_stats NEW: Secure RPC
2066 svcunix_create NEW: sunrpc etx
2067 svcunixfd_create NEW: sunrpc ext
2068 swapcontext NEW: Unix98
2069 tcgetsid NEW: Unix98 PTY
2070 tdestroy NEW: GNU ext.
2071 tgamma NEW: ISO C 9x
2072 tgammaf NEW: ISO C 9x
2073 tgammal NEW: ISO C 9x
2077 truncf NEW: ISO C 9x
2078 truncl NEW: ISO C 9x
2080 unlockpt NEW: Unix98 PTY
2081 updwtmpx NEW: Unix98
2082 user2netname NEW: Secure RPC
2083 utmpxname NEW: Unix98
2084 versionsort NEW: GNU ext.
2085 versionsort64 NEW: GNU ext.
2087 wcscasecmp NEW: GNU ext.
2088 wcsncasecmp NEW: GNU ext.
2089 wcsnlen NEW: GNU ext.
2090 wcstoimax NEW: ISO C 9x
2091 wcstoll NEW: ISO C 9x
2092 wcstoull NEW: ISO C 9x
2093 wcstoumax NEW: ISO C 9x
2095 wordexp NEW: POSIX.2
2096 wordfree NEW: POSIX.2
2097 write_profiling REMOVED
2098 xdecrypt NEW: Secure RPC
2099 xdr_authdes_cred NEW: Secure RPC
2100 xdr_authdes_verf NEW: Secure RPC
2101 xdr_cryptkeyarg NEW: Secure RPC
2102 xdr_cryptkeyarg2 NEW: Secure RPC
2103 xdr_cryptkeyres NEW: Secure RPC
2104 xdr_getcredres NEW: Secure RPC
2105 xdr_key_netstarg NEW: Secure RPC
2106 xdr_key_netstres NEW: Secure RPC
2107 xdr_keybuf NEW: Secure RPC
2108 xdr_keystatus NEW: Secure RPC
2109 xdr_netnamestr NEW: Secure RPC
2110 xdr_sizeof NEW: Secure RPC
2111 xdr_unixcred NEW: sunrpc ext
2112 xencrypt NEW: Secure RPC
2113 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2124 * inet_ntoa is thread-safe
2126 * updwtmp is moved from libutil to libc
2128 * rewrite of cbrt function
2130 * update of timezone data
2144 * add atoll function
2146 * fix complex problems in Berkeley DB code
2148 * fix math functions
2152 * fixed lots of header problems (especially Linux/GNU specific)
2154 * dynamic loader preserves all registers
2156 * Roland McGrath provided support for handling of auxiliary objects in
2157 the ELF dynamic loader.
2159 * support for parallel builds is improved
2163 * GNU extensions are no longer declared by default. To enable them you
2164 must define the macro `_GNU_SOURCE' in your program or compile with
2167 * The library has changed from using GNU ld symbol aliases to using weak
2168 symbols where available. The ELF object file format supports weak
2169 symbols; GNU ld also supports weak symbols in the a.out format. (There
2170 is also now support for other GNU ld extensions in ELF. Use the
2171 `--with-elf' option to configure to indicate you have ELF, and
2172 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2173 of many files which contained only symbol aliases, reducing the size of
2174 the source and the compiled library; many other files were renamed to
2175 less cryptic names previously occupied by the symbol alias files.
2176 There is a new header file <elf.h> for programs which operate on
2177 files in the ELF format.
2179 * Converted to Autoconf version 2, so `configure' has more options.
2180 Run `configure --help' to see the details.
2182 * The library can now be configured to build profiling, highly-optimized
2183 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2184 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2185 `configure' enable building these extra libraries. The shared library is
2186 built by default when using both ELF and GNU ld. When shared libraries
2187 are enabled, the new library `-ldl' is available for arbitrary run-time
2188 loading of shared objects; its interface is defined in <dlfcn.h>. The
2189 new header file <link.h> gives access to the internals of the run-time
2190 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2191 application of same name on other systems and it provides information
2192 about dynamically linked binaries.
2194 * The C library now provides the run-time support code for profiling
2195 executables compiled with `-pg'. Programs can control the profiling code
2196 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2197 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2198 the support for this file format was contributed by David Mosberger-Tang.
2200 * The math code has been replaced with a math library based on fdlibm from
2201 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2202 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2203 functions. The math functions now reside in a separate library, so
2204 programs using them will need to use `-lm' their linking commands.
2206 * John C. Bowman contributed optimized ix87 assembler inline functions.
2208 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2209 mechanism similar to that found in Solaris 2. This is now used for the
2210 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2211 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2212 file controls what services are used for each individual database. This
2213 works by loading shared libraries with names specified in `nsswitch.conf',
2214 so service modules can be changed or added at any time without even
2215 relinking any program. Currently there are the file, db, and NIS based
2216 NSS services available.
2218 * The new functions `strtoq' and `strtouq' parse integer values from
2219 strings, like `strtol' and `strtoul', but they return `long long int' and
2220 `unsigned long long int' values, respectively (64-bit quantities).
2222 * The new functions `strtof' and `strtold' parse floating-point values from
2223 strings, like `strtod', but they return `float' and `long double' values,
2224 respectively (on some machines `double' and `long double' are the same).
2226 * Ulrich Drepper has contributed new implementations of the floating-point
2227 printing and reading code used in the `printf' family of functions and
2228 `strtod', `strtof', and `strtold'. These new functions are perfectly
2229 accurate, and much faster than the old ones.
2231 * The implementation of the POSIX locale model was completely rewritten by
2232 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2233 to compile the POSIX locale definition.
2235 * The former dummy implementations of the strcoll and strxfrm function are
2236 now replaced by fully functional code contributed by Ulrich Drepper. The
2237 collation information comes from the POSIX locale definitions.
2239 * The new header <langinfo.h> defines an interface for accessing
2240 various locale-dependent data (using the locale chosen with `setlocale').
2242 * Ulrich Drepper has contributed a new suite of functions for operation on
2243 wide-character and multibyte-character strings, in <wchar.h>;
2244 and classification and case conversion of wide characters, in <wctype.h>.
2245 These new functions are conforming to the ISO C, Amendement 1 specification.
2247 * There is now a second implementation of the standard I/O library available.
2248 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2249 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2251 * You can now use positional parameter specifications in format strings
2252 for the `printf' and `scanf' families of functions. For example,
2253 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2254 ``Number 6, Mr Jones''. This is mainly useful when providing different
2255 format strings for different languages, whose grammars may dictate
2256 different orderings of the values being printed. To support this
2257 feature, the interface for `register_printf_handler' has changed; see
2258 the header file <printf.h> for details.
2260 * The `printf' and `scanf' families of functions now understand a new
2261 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2262 to group numbers as indicated by the locale; for `scanf' and friends, this
2263 says to accept as valid only a number with all the proper grouping
2264 separators in the right places. In the default "C" locale, numbers are
2265 not grouped; but locales for specific countries will define the usual
2266 conventions (i.e. separate thousands with `,' in the US locale).
2268 * The pgrp functions have been regularized, slightly incompatibly but much
2269 less confusingly. The core functions are now `getpgid' and `setpgid',
2270 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2271 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2272 provided for compatibility. There is no longer an incompatible `getpgrp'
2273 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2275 * The new header file <fts.h> and suite of functions simplify programs that
2276 operate on directory trees. This code comes from 4.4 BSD.
2278 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2279 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2280 NSS scheme used in glibc.
2282 * There is a new malloc debugging hook `__memalign_hook'.
2284 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2285 `unsigned int' in <sys/types.h>. These are for compatibility only and
2286 their use is discouraged.
2288 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2289 done differently, so that it works even without GNU ld.
2291 * New function `euidaccess' checks allowed access to a file like `access',
2292 but using the effective IDs instead of the real IDs.
2294 * The time zone data files have been updated for the latest and greatest
2295 local time conventions of the countries of the world.
2297 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2300 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2301 for formatting floating-point numbers. They are provided only for
2302 compatibility; new programs should use `sprintf' instead. There are
2303 also equivalent function for the `long double' floating-point type and
2304 all functions also exist in a reentrant form.
2306 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2307 functions for maintaining the login-record files (primarily of use to
2308 system programs such as `login'), and convenient functions for
2309 allocating and initializing a pseudo-terminal (pty) device.
2311 * Ulrich Drepper has contributed new support for System V style
2312 shared memory and IPC on systems that support it.
2314 * Ulrich Drepper has contributed several miscellaneous new functions found
2315 in System V: The `hsearch' family of functions provide an effective
2316 implementation of hash tables; `a64l' and `l64a' provide a very simple
2317 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2320 * Ulrich Drepper has contributed new reentrant counterparts for the
2321 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2323 * Ulrich Drepper has contributed new, highly-optimized versions of several
2324 string functions for the i486/Pentium family of processors.
2326 * Ulrich Drepper has updated the Linux-specific code, based largely
2327 on work done in Hongjiu Lu's version of GNU libc for Linux.
2328 The GNU library now supports Linux versions 2.0.10 and later,
2329 using the ELF object file format (i[3456]86-*-linux).
2331 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2333 * David Mosberger-Tang and Richard Henderson have ported the C library
2334 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2335 dynamic linking support for ELF/Alpha.
2337 * Richard Henderson contributed several Alpha optimized assembler function
2338 for arithmetic and string handling.
2340 * Ulrich Drepper has contributed a new set of message catalog functions to
2341 support multiple languages using the <libintl.h> interface, for use with
2342 his new package GNU gettext. Translation volunteers have contributed
2343 catalogs of the library's messages in Spanish, German, and Korean.
2345 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2346 program and the `catgets' function for reading the catalog files it
2347 creates. (The <libintl.h> interface is preferred; we include the
2348 <nl_types.h> interface using `catgets' only for source compatibility with
2349 programs already written to use it.)
2351 * New header file <values.h> gives SVID-compatible names for <limits.h>
2354 * Various new macros, declarations, and small header files for compatibility
2357 * New function `group_member' is a convenient way to check if a process has
2358 a given effective group ID.
2360 * When using GCC 2.7 and later, the socket functions are now declared in a
2361 special way so that passing an argument of type `struct sockaddr_in *',
2362 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2363 `struct sockaddr *' type, does not generate a type-clash warning.
2365 * New function `error' declared in header file <error.h> is a convenient
2366 function for printing error messages and optionally exiting; this is the
2367 canonical function used in GNU programs. The new functions `err', `warn',
2368 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2369 doing the same thing.
2371 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2372 POSIX.2 `glob' function to do ~ and {...} expansion.
2374 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2375 `clearenv' which is used in POSIX.9 is also available.
2377 * New function `getsid' returns session ID number on systems that support it.
2379 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2380 files <db.h> and <mpool.h> provide a rich set of functions for several
2381 types of simple databases stored in memory and in files, and <ndbm.h> is
2382 an old `ndbm'-compatible interface using the `db' functions. Link with
2383 `-ldb' to get these functions.
2385 * New macro `strdupa' copies a string like `strdup', but uses local stack
2386 space from `alloca' instead of dynamic heap space from `malloc'.
2388 * New function `strnlen' is like `strlen' but searches only a given maximum
2389 number of characters for the null terminator. `stpncpy', `strndup' and
2390 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2393 * New function `statfs' in header <sys/statfs.h>.
2395 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2396 provide convenient functions for operating on blocks of null-terminated
2399 * A new suite of functions in <utmp.h> handle all the details of reading
2400 and writing the utmp file.
2402 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2405 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2406 completely POSIX compliant and also implemented the extended functionality
2407 to handle alternate digit representation and alternate era date formats.
2409 * Ulrich Drepper provided an implementation of the `strptime' function
2410 defined in XPG4.2 which transforms a string into a `struct tm' value.
2412 * Paul Eggert provided the tzselect shell script as part of the timezone
2413 code. The shell script makes it easy to select the correct timezone
2416 * The implementation of the malloc family of functions is completely replaced
2417 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2418 The implementation uses the mmap function (if available) and it is
2419 optimized for the use in multi threaded programs.
2421 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2422 functions. This new functionality is usable by specifying a special
2423 salt string and it is compatible with implementation on *BSD systems.
2425 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2426 `getsubopt' to handle second level command line options, `bsd_signal'
2427 to access BSD style `signal' functionality, the obsolete `regexp' style
2430 * the `lchown' function is available on system which support this
2433 * The implementation of the shadow password handling function was contributed
2436 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2438 * POSIX.1g support was added. The <sys/select.h> header is available,
2439 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2440 implementation of `getaddrinfo'.
2444 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2446 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2447 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2449 * The new function `daemon' from 4.4 BSD is useful for server programs that
2450 want to put themselves in the background.
2452 * Joel Sherrill has contributed support for several standalone boards that
2453 run without an operating system.
2455 * `printf', `scanf' and friends now accept a `q' type modifier for long
2456 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2458 * All of the code taken from BSD (notably most of the math and networking
2459 routines) has been updated from the BSD 4.4-Lite release.
2461 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2463 * The new functions `getdomainname' and `setdomainname' fetch or change the
2464 YP/NIS domain name. These are system calls which exist on systems which
2467 * The time zone data files have been updated for the latest international
2470 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2471 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2475 * The C library now includes support for Sun RPC, from Sun's free
2476 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2477 are included. (There is still no support for YP.)
2479 * Tom Quinn has contributed a port of the C library to SGI machines running
2480 Irix 4 (mips-sgi-irix4).
2482 * The new `lockf' function is a simplified interface to the locking
2483 facilities of `fcntl', included for compatibility.
2485 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2487 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2489 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2492 * The error message printed by `assert' for a failed assertion now includes
2493 the name of the program (if using GNU ld) and the name of the calling
2494 function (with versions of GCC that support this).
2496 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2498 * The library now includes the <sys/mman.h> header file and memory
2499 management functions `mmap', `munmap', `mprotect', `msync', and
2500 `madvise', on systems that support those facilities.
2502 * The interface for `mcheck' has changed slightly: the function called to
2503 abort the program when an allocation inconsistency is detected now takes
2504 an argument that indicates the type of failure. The new function
2505 `mprobe' lets you request a consistency check for a particular block at
2506 any time (checks are normally done only when you call `free' or `realloc'
2509 * It is now possible to easily cross-compile the C library, building on one
2510 system a library to run on another machine and/or operating system. All
2511 you need to do is set the variable `HOST_CC' in `configparms' to the
2512 native compiler for programs to run on the machine you are building on (a
2513 few generator programs are used on Unix systems); set `CC' to the
2516 * The new function `fexecve' (only implemented on the GNU system) executes
2517 a program file given a file descriptor already open on the file.
2521 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2522 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2524 * You can set the variable `libprefix' in `configparms' to specify a prefix
2525 to be prepended to installed library files; this makes it easy to install
2526 the GNU C library to be linked as `-lgnuc' or whatever.
2528 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2529 copies a limited number of characters from a string, and returns the
2530 address of the last character written.
2532 * You no longer need to check for whether the installed `stddef.h' is
2533 compatible with the GNU C library. configure now checks for you.
2535 * You can now define a per-stream `fileno' function to convert the
2536 stream's cookie into an integral file descriptor.
2538 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2539 allocates zero bytes of storage, and returns a unique pointer which
2540 you can pass to `realloc' or `free'. The behavior is undefined if
2541 you dereference this pointer.
2543 * The C library now runs on Sony NEWS m68k machines running either
2544 NewsOS 3 or NewsOS 4.
2546 * The new `syscall' function is a system-dependent primitive function
2547 for invoking system calls. It has the canonical behavior on Unix
2548 systems, including unreliable return values for some calls (such as
2549 `pipe', `fork' and `getppid').
2551 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2552 to `EAGAIN', which is the preferred name. On systems whose kernels
2553 use two distinct codes, the C library now translates EWOULDBLOCK to
2554 EAGAIN in every system call function.
2558 * The GNU C Library Reference Manual is now distributed with the library.
2559 `make dvi' will produce a DVI file of the printed manual.
2560 `make info' will produce Info files that you can read on line using C-h i
2561 in Emacs or the `info' program.
2562 Please send comments on the manual to bug-glibc-manual@gnu.org.
2564 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2566 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2568 * Jason Merrill has contributed a port to the Sequent Symmetry running
2569 Dynix version 3 (i386-sequent-dynix).
2571 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2572 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2574 * New function `memory_warnings' lets you arrange to get warnings when
2575 malloc is running out of memory to allocate, like Emacs gives you.
2577 * The C library now contains the relocating allocator used in Emacs 19 for
2578 its editing buffers. This allocator (ralloc) minimizes allocation
2579 overhead and fragmentation by moving allocated regions around whenever it
2580 needs to. You always refer to a ralloc'd region with a "handle" (a
2581 pointer to a pointer--an object of type `void **').
2583 * There is a new `printf' format: `%m' gives you the string corresponding
2584 to the error code in `errno'.
2586 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2587 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2588 pass, the `a' modifier says to fill in a `char **' you pass with a
2591 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2592 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2593 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2595 * `mkstemp' is a traditional Unix function to atomically create and open a
2596 uniquely-named temporary file.
2600 * The standard location for the file that says what the local timezone is
2601 has changed again. It is now `/usr/local/etc/localtime' (or more
2602 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2604 * The distribution no longer contains any files with names longer than 14
2607 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2608 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2610 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2614 * The configuration process has changed quite a bit. The `configure'
2615 script is now used just like the configuration scripts for other GNU
2616 packages. The `sysdeps' directory hierarchy is much rearranged.
2617 The file `INSTALL' explains the new scheme in detail.
2619 * The header files no longer need to be processed into ANSI C and
2620 traditional C versions. There is just one set of files to install, and
2621 it will work with ANSI or old C compilers (including `gcc -traditional').
2623 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
2624 MIPS DECStation running Ultrix 4.
2626 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
2627 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
2628 made itself into a shared library.
2630 * Yet further improved support for the i386, running 4.3 BSD-like systems
2631 (such as Mach 3 with the Unix single-server), or System V.
2633 * New function `strncasecmp' to do case-insensitive string comparison
2634 with limited length.
2636 * New function `strsep' is a reentrant alternative to `strtok'.
2638 * New functions `scandir' and `alphasort' for searching directories.
2640 * New function `setenv' is a better interface to `putenv'.
2642 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
2643 function for traversing a directory tree.
2645 * The GNU obstack package is now also part of the C library.
2646 The new function `open_obstack_stream' creates a stdio stream that
2647 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
2648 formatted output directly to an obstack.
2650 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
2651 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
2653 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
2655 * The new functions `strfry' and `memfrob' do mysterious and wonderful
2656 things to your strings.
2658 * There are some new test programs: test-fseek, testmb, and testrand.
2660 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
2661 These ports are not finished, but are a good starting place for really
2662 supporting those systems.
2664 * `/etc/localtime' is now the standard location for the file that says what
2665 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
2666 This follows the general principle that `/etc' is the place for all local
2667 configuration files.
2669 * The C library header files now use `extern "C"' when used by the C++
2670 compiler, so the C library should now work with C++ code.
2672 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
2673 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
2676 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
2677 function which uses the `merge sort' algorithm, and is said to be
2678 significantly faster than the old GNU `qsort' function. Merge sort is
2679 now the standard `qsort' function. The new algorithm can require a lot
2680 of temporary storage; so, the old sorting function is called when the
2681 required storage is not available.
2683 * The C library now includes Michael Glad's Ultra Fast Crypt, which
2684 provides the Unix `crypt' function, plus some other entry points.
2686 * The code and header files taken from 4.4 BSD have been updated with the
2687 latest files released from Berkeley.
2689 ----------------------------------------------------------------------
2690 Copyright information:
2692 Copyright (C) 1992-2015 Free Software Foundation, Inc.
2694 Permission is granted to anyone to make or distribute verbatim copies
2695 of this document as received, in any medium, provided that the
2696 copyright notice and this permission notice are preserved,
2697 thus giving the recipient permission to redistribute in turn.
2699 Permission is granted to distribute modified versions
2700 of this document, or of portions of it,
2701 under the above conditions, provided also that they
2702 carry prominent notices stating who last changed them.
2705 version-control: never