1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 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 feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
36 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
37 the femode_t type and the FE_DFL_MODE macro.
39 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
40 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
41 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
42 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
43 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
44 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
45 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
46 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
47 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
48 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
49 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
52 * New <math.h> features are added from TS 18661-1:2014:
54 - Comparison macros: iseqsig.
56 - Classification macros: iscanonical, issubnormal, iszero.
58 - Total order functions: totalorder, totalorderf, totalorderl,
59 totalordermag, totalordermagf, totalordermagl.
61 - NaN functions: getpayload, getpayloadf, getpayloadl.
63 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
64 for the Linux quota interface which predates kernel version 2.4.22 has
67 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
68 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
69 “no-ip6-dotint” had already been the default, and support for the
70 “ip6-dotint” option was removed from the Internet in 2006.
72 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
73 flag from <resolv.h> have been removed. The option relied on a
74 backwards-incompatible DNS extension which was never deployed on the
77 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
78 in the <resolv.h> header file have been deprecated. They were already
81 * DNSSEC-related declarations and definitions have been removed from the
82 <arpa/nameser.h> header file, and libresolv will no longer attempt to
83 decode the data part of DNSSEC record types. Previous versions of glibc
84 only implemented minimal support for the previous version of DNSSEC, which
85 is incompatible with the currently deployed version.
87 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
88 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
89 <arpa/nameser.h> header file because the distinction between RR types and
90 meta-RR types is not officially standardized, subject to revision, and
91 thus not suitable for encoding in a macro.
93 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
94 and rhook members of the res_state type in <resolv.h> have been removed.
95 The glibc stub resolver did not support these hooks, but the header file
98 * For multi-arch support it is recommended to use a GCC which has
99 been built with support for GNU indirect functions. This ensures
100 that correct debugging information is generated for functions
101 selected by IFUNC resolvers. This support can either be enabled by
102 configuring GCC with '--enable-gnu-indirect-function', or by
103 enabling it by default by setting 'default_gnu_indirect_function'
104 variable for a particular architecture in the GCC source file
107 Security related changes:
109 On ARM EABI (32-bit), generating a backtrace for execution contexts which
110 have been created with makecontext could fail to terminate due to a
111 missing .cantunwind annotation. This has been observed to lead to a hang
112 (denial of service) in some Go applications compiled with gccgo. Reported
113 by Andreas Schwab. (CVE-2016-6323)
115 The following bugs are resolved with this release:
117 [The release manager will add the list generated by
118 scripts/list-fixed-bugs.py just before the release.]
122 * The minimum Linux kernel version that this version of the GNU C Library
123 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
124 kernel version 2.6.32 or later suffices (on architectures that already
125 required kernel versions more recent than 3.2, those requirements remain
126 unchanged). Linux 3.2 or later kernel headers are required on all
129 * The pap_AN locale has been deleted. This has been deprecated for a long
130 time. It has been replaced by pap_AW & pap_CW, both of which have long
131 been included in previous releases.
133 * The readdir_r and readdir64_r functions have been deprecated. It is
134 recommended to use readdir and readdir64 instead.
136 * The type “union wait” has been removed. It was deprecated in the early
137 1990s and never part of POSIX. Application code should use the int type
138 instead of “union wait”.
140 * A new NSS action is added to facilitate large distributed system
141 administration. The action, MERGE, allows remote user stores like LDAP
142 to be merged into local user stores like /etc/groups in order to provide
143 easy to use, updated, and managed sets of merged credentials. The new
144 action can be used by configuring it in /etc/nsswitch.conf:
145 group: files [SUCCESS=merge] nis
146 Implemented by Stephen Gallagher (Red Hat).
148 * The deprecated __malloc_initialize_hook variable has been removed from the
151 * The long unused localedef --old-style option has been removed. It hasn't
152 done anything in over 16 years. Scripts using this option can safely
155 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
156 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
157 return the next representable value in the direction of positive infinity
158 and the nextdown functions return the next representable value in the
159 direction of negative infinity. These are currently enabled as GNU
162 Security related changes:
164 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
165 could result in a stack overflow when getnetbyname was called with an
166 overly long name. (CVE-2016-3075)
168 * Previously, getaddrinfo copied large amounts of address data to the stack,
169 even after the fix for CVE-2013-4458 has been applied, potentially
170 resulting in a stack overflow. getaddrinfo now uses a heap allocation
171 instead. Reported by Michael Petlan. (CVE-2016-3706)
173 * The glob function suffered from a stack-based buffer overflow when it was
174 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
175 Reported by Alexander Cherepanov. (CVE-2016-1234)
177 * The Sun RPC UDP client could exhaust all available stack space when
178 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
179 alloca plugin for GCC. (CVE-2016-4429)
181 * The IPv6 name server management code in libresolv could result in a memory
182 leak for each thread which is created, performs a failing naming lookup,
183 and exits. Over time, this could result in a denial of service due to
184 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
186 The following bugs are resolved with this release:
188 [1170] localedata: ne_NP: update Nepali locale definition file
189 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
191 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
192 [6796] math: fdim() does not set errno on overflow
193 [10354] libc: posix_spawn should use vfork() in more cases than presently
194 [11213] localedata: localedata: add copyright disclaimer to locale files
195 [12143] localedata: chr_US: new Cherokee locale
196 [12450] localedata: sgs_LT: new locale
197 [12676] localedata: ln_CD: new locale
198 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
200 [13304] math: fma, fmaf, fmal produce wrong results
201 [14259] build: --localedir arg to configure is ignored
202 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
203 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
204 [14934] localedata: es_CL: wrong first weekday chilean locale
205 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
207 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
209 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
210 [15368] nptl: raise() is not async-signal-safe
211 [15479] math: ceil, floor, round and trunc raise inexact exception
212 [15578] localedata: kk_KZ: various updates
213 [16003] localedata: pap_AN: punt old locale
214 [16137] localedata: iw_IL: punt old locale
215 [16190] localedata: eo: new esperanto locale
216 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
217 [16742] malloc: race condition: pthread_atfork() called before first
218 malloc() results in unexpected locking behaviour/deadlocks
219 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
221 [16983] localedata: postal_fmt does not allow %l and %n modifiers
222 [17565] localedata: pt_PT: wrong (work-)week start
223 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
224 [17950] build: Build fails with -msse
225 [18205] localedata: be_BY*: wrong first_weekday and first_workday
226 [18433] libc: posix_spawn does not return correctly upon failure to
228 [18453] localedata: charmaps/IBM875: incorrect codes
229 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
231 [18896] localedata: he_IL: improvements for currency
232 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
234 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
236 [19056] libc: Deprecate readdir_r
237 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
239 [19198] localedata: nl_NL: small improvements for Dutch locales
240 [19257] network: Per-thread memory leak in __res_vinit with IPv6
241 nameservers (CVE-2016-5417)
242 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
244 [19400] locale: Language missing in "iso-639.def", trivial fix in
246 [19431] malloc: Deadlock between fflush, getdelim, and fork
247 [19505] libc: Incorrect file descriptor validity checks in
248 posix_spawn_file_actions_add{open,close,dup2}
249 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
251 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
252 `intl/{gettextP,loadinfo}.h'
253 [19534] libc: execle, execlp may use malloc
254 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
255 [19573] network: res_nclose and __res_maybe_init disagree about name
256 server initialization, breaking Hesiod
257 [19575] localedata: Status of GB18030 tables
258 [19581] localedata: sr_* date_fmt string contains additional newline
259 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
261 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
262 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
263 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
264 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
266 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
268 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
270 [19610] dynamic-link: ldconfig -X removes stale symbolic links
271 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
272 [19633] locale: strfmon_l applies global locale to number formatting
273 [19642] network: Memory leak in getnameinfo
274 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
275 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
277 [19654] math: [x86_64] Need testcase for BZ #19590 fix
278 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
280 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
281 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
283 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
285 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
287 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
288 pointers and lengths in error-case.
289 [19727] locale: Converting from/to UTF-xx with iconv() does not always
290 report errors on UTF-16 surrogates values.
291 [19755] nscd: nscd assertion failure in gc
292 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
293 [19759] libc: mempcpy shouldn't be inlined
294 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
295 [19765] libc: s390 needs an optimized mempcpy
296 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
297 NAME_MAX limit assumption (CVE-2016-1234)
298 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
299 [19787] network: Missing and incorrect truncation checks in getnameinfo
300 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
302 [19791] network: Assertion failure in res_query.c with un-connectable name
304 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
305 [19822] math: libm.so install clobbers old version
306 [19825] network: resolv: send_vc can return uninitialized data in second
307 response to getaddrinfo
308 [19830] network: nss_dns: should check RDATA length against buffer length
309 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
310 confronted with A/AAAA records of invalid size
311 [19837] nss: nss_db: No retries for some long lines with a larger buffer
312 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
313 [19853] stdio: Printing IBM long double in decimal with high precision is
315 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
316 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
317 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
319 [19865] network: Assertion failure or memory leak in
320 _nss_dns_getcanonname_r
321 [19868] network: nss_dns: netent code does not skip over non-PTR records
322 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
324 [19881] string: Improve x86-64 memset
325 [19907] string: Incorrect memcpy tests
326 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
328 [19925] libc: termios.h XCASE namespace
329 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
330 [19929] libc: limits.h NL_NMAX namespace
331 [19931] stdio: Memory leak in vfprintf
332 [19957] libc: clone(CLONE_VM) access invalid parent memory
333 [19963] localedata: en_IL: New locale
334 [19989] stdio: stdio.h cuserid namespace
335 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
337 [19996] locale: langinfo.h nl_langinfo_l namespace
338 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
339 [20010] network: getaddrinfo: Stack overflow in hostent translation
341 [20012] stdio: libio: fmemopen append mode failure
342 [20014] stdio: stdio.h namespace for pre-threads POSIX
343 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
344 [20023] libc: fcntl.h timespec namespace
345 [20024] math: [x86_64] vectorized sincos trashes the stack
346 [20031] network: nss_hesiod: Heap overflow in get_txt_records
347 [20041] time: sys/time.h timespec namespace
348 [20043] libc: unistd.h missing cuserid for UNIX98 and before
349 [20044] libc: unistd.h missing pthread_atfork for UNIX98
350 [20051] libc: ttyslot in wrong header under wrong conditions
351 [20054] libc: gethostname not declared for XPG4
352 [20055] libc: termios.h missing tcgetsid for XPG4
353 [20072] dynamic-link: x86 init_cpu_features is called twice in static
355 [20073] libc: sys/stat.h fchmod namespace
356 [20074] libc: stdlib.h rand_r namespace
357 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
358 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
360 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
361 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
363 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
364 [20119] libc: Wrong mask for processors level type from CPUID
365 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
366 AS not supporting AVX512
367 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
369 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
370 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
372 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
373 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
374 [20178] libc: posix_spawn{p} should not call exit
375 [20191] stdio: libio: vtables hardening
376 [20195] string: FMA4 detection requires CPUID execution with register
378 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
379 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
381 [20212] math: acos (sNaN) returns sNaN
382 [20213] math: asin (sNaN) returns sNaN
383 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
384 [20218] math: [i386] asinhl (sNaN) returns sNaN
385 [20219] math: [i386] atanhl (sNaN) returns sNaN
386 [20222] stdio: fopencookie: Mangle function pointers
387 [20224] math: [i386] cbrtl (sNaN) returns sNaN
388 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
389 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
391 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
392 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
393 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
394 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
395 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
396 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
397 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
398 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
399 [20240] math: modf (sNaN) returns sNaN
400 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
401 [20250] math: frexp (sNaN) returns sNaN
402 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
403 [20255] math: [i386] fdim, fdimf return with excess range and precision /
405 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
406 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
407 subscript is below array bounds [-Werror=array-bounds]
408 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
409 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
411 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
412 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
414 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
416 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
417 [20316] localedata: id_ID: Februari instead of Pebruari
418 [20327] string: POWER8 strcasecmp returns incorrect result
419 [20347] math: Failure: Test: j0_downward (0xap+0)
420 [20348] libc: FAIL: misc/tst-preadvwritev64
421 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
422 [20350] libc: There is no test for p{read,write}64
423 [20357] math: Incorrect cos result for 1.5174239687223976
424 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
428 * Unicode 8.0.0 Support: Character encoding, character type info, and
429 transliteration tables are all updated to Unicode 8.0.0, using new
430 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
431 These updates cause user visible changes, such as the fixes for bugs
432 89, 16061, and 18568.
434 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
435 kernel-internal CPU set size. This means that requests that change the
436 CPU affinity which failed before (for example, an all-ones CPU mask) will
437 now succeed. Applications that need to determine the effective CPU
438 affinities need to call sched_getaffinity or pthread_getaffinity_np after
439 setting it because the kernel can adjust it (and the previous size check
440 would not detect this in the majority of cases).
442 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
443 the following new symbols are used: fts64_children, fts64_close,
444 fts64_open, fts64_read and fts64_set.
446 * getaddrinfo now detects certain invalid responses on an internal netlink
447 socket. If such responses are received, an affected process will
448 terminate with an error message of "Unexpected error <number> on netlink
449 descriptor <number>" or "Unexpected netlink response of size <number> on
450 descriptor <number>". The most likely cause for these errors is a
451 multi-threaded application which erroneously closes and reuses the netlink
452 file descriptor while it is used by getaddrinfo.
454 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
455 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
456 unnecessary serialization of memory allocation requests across threads.
457 The defect is now corrected. Users should see a substantial increase in
458 the concurent throughput of allocation requests for applications which
459 trigger this bug. Affected applications typically create and
460 destroy threads frequently. (Bug 19048 was reported and analyzed by
463 * There is now a --disable-timezone-tools configure option for disabling the
464 building and installing of the timezone related utilities (zic, zdump, and
465 tzselect). This is useful for people who build the timezone data and code
466 independent of the GNU C Library.
468 * The obsolete header <regexp.h> has been removed. Programs that require
469 this header must be updated to use <regex.h> instead.
471 * The obsolete functions bdflush, create_module, get_kernel_syms,
472 query_module and uselib are no longer available to newly linked binaries;
473 the header <sys/kdaemon.h> has been removed. These functions and header
474 were specific to systems using the Linux kernel and could not usefully be
475 used with the GNU C Library on systems with version 2.6 or later of the
478 * Optimized string, wcsmbs and memory functions for IBM z13.
479 Implemented by Stefan Liebler.
481 * Newly linked programs that define a variable called signgam will no longer
482 have it set by the lgamma, lgammaf and lgammal functions. Programs that
483 require signgam to be set by those functions must ensure that they use the
484 variable provided by the GNU C Library and declared in <math.h>, without
485 defining their own copy.
487 * The minimum GCC version that can be used to build this version of the GNU
488 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
489 still be used to compile programs using the GNU C Library.
491 Security related changes:
493 * An out-of-bounds value in a broken-out struct tm argument to strftime no
494 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
496 * The LD_POINTER_GUARD environment variable can no longer be used to disable
497 the pointer guard feature. It is always enabled. Previously,
498 LD_POINTER_GUARD could be used to disable security hardening in binaries
499 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
502 * An integer overflow in hcreate and hcreate_r could lead to an
503 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
505 * The catopen function no longer has unbounded stack usage. Reported by
508 * The nan, nanf and nanl functions no longer have unbounded stack usage
509 depending on the length of the string passed as an argument to the
510 functions. Reported by Joseph Myers. (CVE-2014-9761)
512 * A stack-based buffer overflow was found in libresolv when invoked from
513 libnss_dns, allowing specially crafted DNS responses to seize control
514 of execution flow in the DNS client. The buffer overflow occurs in
515 the functions send_dg (send datagram) and send_vc (send TCP) for the
516 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
517 family. The use of AF_UNSPEC triggers the low-level resolver code to
518 send out two parallel queries for A and AAAA. A mismanagement of the
519 buffers used for those queries could result in the response of a query
520 writing beyond the alloca allocated buffer created by
521 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
522 the overflow. Thanks to the Google Security Team and Red Hat for
523 reporting the security impact of this issue, and Robert Holiday of
524 Ciena for reporting the related bug 18665. (CVE-2015-7547)
526 The following bugs are resolved with this release:
528 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
529 [887] math: Math library function "logb" and "nextafter" inconsistent
530 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
531 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
532 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
533 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
535 [4404] localedata: German translation of "Alarm clock" is misleading
536 [6799] math: nextafter() and nexttoward() doen't set errno on
537 overflow/underflow errors
538 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
540 [10432] nis: _nss_nis_setnetgrent assertion failure
541 [11460] libc: fts has no LFS support
542 [12926] network: getaddrinfo()/make_request() may spin forever
543 [13065] nptl: Race condition in pthread barriers
544 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
545 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
547 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
548 [14912] libc: Rename non-installed bits/*.h headers
549 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
550 [15367] math: Let gcc use __builtin_isinf
551 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
552 [15421] math: lgamma wrongly sets signgam for ISO C
553 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
554 FE_INVALID with argument out of range
555 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
557 [15786] dynamic-link: ifunc resolver functions can smash function
559 [15918] math: Unnecessary check for equality in hypotf()
560 [16061] localedata: Review / update transliteration data
561 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
563 [16141] time: strptime %z offset restriction
564 [16171] math: drem should be alias of remainder
565 [16296] math: fegetround is pure?
566 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
567 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
569 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
570 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
572 [16422] math: [powerpc] math-float, math-double failing llrint tests with
573 "Exception "Inexact" set" on ppc32
574 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
575 [16517] math: Missing underflow exception from tanf/tan/tanl
576 [16519] math: Missing underflow exception from sinhf
577 [16520] math: Missing underflow exception from tanhf
578 [16521] math: Missing underflow exception from exp2
579 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
581 [16734] stdio: fopen calls mmap to allocate its buffer
582 [16961] math: nan function incorrect handling of bad sequences
583 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
584 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
585 [16985] locale: localedef: confusing error message when opening output
587 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
588 [17197] locale: Redundant shift character in iconv conversion output at
590 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
591 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
592 [17250] dynamic-link: static linking breaks nss loading
593 (getaddrinfo/getpwnam/etc...)
594 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
596 [17441] math: isnan() should use __builtin_isnan() in GCC
597 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
598 (related to lock elision)
599 [17787] manual: Exponent on page 324 of the PDF ends prematurely
600 [17886] time: strptime should be able to parse "Z" as a timezone with %z
601 [17887] time: strptime should be able to parse "+01:00" style timezones
602 [17905] libc: catopen() Multiple unbounded stack allocations
604 [18084] libc: backtrace (..., 0) dumps core on x86
605 [18086] libc: nice() sets errno to 0 on success
606 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
607 is too large (CVE-2015-8778)
608 [18251] dynamic-link: SONAME missing when audit modules provides path
609 [18265] libc: add attributes for wchar string and memory functions
610 [18370] math: csqrt missing underflows
611 [18421] libc: [hppa] read-only segment has dynamic relocations
612 [18472] libc: Obsolete syscall wrappers should be compat symbols
613 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
614 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
615 [18525] localedata: Remove locale timezone information
616 [18560] libc: [powerpc] spurious bits/ipc.h definitions
617 [18568] localedata: Update locale data to Unicode 8.0
618 [18589] locale: sort-test.sh fails at random
619 [18595] math: ctan, ctanh missing underflows
620 [18604] libc: assert macro-expands its argument
621 [18610] math: S390: fetestexcept() reports any exception if DXC-code
622 contains a vector instruction exception.
623 [18611] math: j1, jn missing errno setting on underflow
624 [18618] localedata: sync Chechen locale definitions with other *_RU
626 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
627 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
628 [18665] network: In send_dg, the recvfrom function is NOT always using the
629 buffer size of a newly created buffer (CVE-2015-7547)
630 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
632 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
634 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
635 [18699] math: tilegx cproj() for various complex infinities does not yield
637 [18724] libc: Harden put*ent functions against data injection
638 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
639 [18755] build: build errors with -DNDEBUG
640 [18757] stdio: fmemopen fails to set errno on failure
641 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
643 [18781] libc: openat64 lacks O_LARGEFILE
644 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
645 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
646 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
647 [18790] math: [ldbl-128ibm] tanhl inaccurate
648 [18795] libc: stpncpy fortification misses buffer lengths that are
650 [18796] build: build fails for --disable-mathvec
651 [18803] math: hypot missing underflows
652 [18820] stdio: fmemopen may leak memory on failure
653 [18823] math: csqrt spurious underflows
654 [18824] math: fma spurious underflows
655 [18825] math: pow missing underflows
656 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
657 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
658 [18870] build: sem_open.c fails to compile with missing symbol
660 [18872] stdio: Fix memory leak in printf_positional
661 [18873] libc: posix_fallocate overflow check ineffective
662 [18875] math: Excess precision leads incorrect libm
663 [18877] libc: arm: mmap offset regression
664 [18887] libc: memory corruption when using getmntent on blank lines
665 [18918] localedata: hu_HU: change time to HH:MM:SS format
666 [18921] libc: Regression: extraneous stat() and fstat() performed by
668 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
669 binaries (CVE-2015-8777)
670 [18951] math: tgamma missing underflows
671 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
673 [18953] localedata: lt_LT: change currency symbol to the euro
674 [18956] math: powf inaccuracy
675 [18961] math: [i386] exp missing underflows
676 [18966] math: [i386] exp10 missing underflows
677 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
678 [18969] build: multiple string test failures due to missing locale
680 [18970] libc: Reference of pthread_setcancelstate in libc.a
681 [18977] math: float / long double Bessel functions not in XSI POSIX
682 [18980] math: i386 libm functions return with excess range and precision
683 [18981] math: i386 scalb*, ldexp return with excess range and precision
684 [18982] stdio: va_list and vprintf
685 [18985] time: Passing out of range data to strftime() causes a segfault
687 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
688 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
689 [19012] locale: iconv_open leaks memory on error path
690 [19016] math: clog, clog10 inaccuracy
691 [19018] nptl: Mangle function pointers in tls_dtor_list
692 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
693 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
694 [19048] malloc: malloc: arena free list can become cyclic, increasing
696 [19049] math: [powerpc] erfc incorrect zero sign
697 [19050] math: [powerpc] log* incorrect zero sign
698 [19058] math: [x86_64] Link fail with -fopenmp and -flto
699 [19059] math: nexttoward overflow incorrect in non-default rounding modes
700 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
701 [19074] network: Data race in _res_hconf_reorder_addrs
702 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
703 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
704 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
706 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
708 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
709 [19086] manual: posix_fallocate64 documented argument order is wrong.
710 [19088] math: lround, llround missing exceptions close to overflow
712 [19094] math: lrint, llrint missing exceptions close to overflow threshold
713 [19095] math: dbl-64 lrint incorrect for 64-bit long
714 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
715 [19124] dynamic-link: ld.so failed to build with older assmebler
716 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
717 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
718 [19134] math: [powerpc32] lround, lroundf spurious exceptions
719 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
720 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
721 pthread_setaffinity_np
722 [19156] math: [ldbl-128] j0l spurious underflows
723 [19164] nptl: tst-getcpu fails with many possible CPUs
724 [19168] math: math/test-ildoubl and math/test-ldouble failure
725 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
726 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
728 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
729 (FE_NOMASK_ENV) do not clear SSE exceptions
730 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
731 _int_new_arena/reused_arena
732 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
733 [19201] math: dbl-64 remainder incorrect sign of zero result
734 [19205] math: bits/math-finite.h conditions do not match math.h and
736 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
737 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
738 for C99-based standards
739 [19212] libc: features.h not -Wundef clean
740 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
742 [19214] libc: Family and model identification for AMD CPU's are incorrect.
743 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
744 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
746 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
748 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
750 [19242] libc: strtol incorrect in Turkish locales
751 [19243] malloc: reused_arena can pick an arena on the free list, leading
752 to an assertion failure and reference count corruption
753 [19253] time: tzset() ineffective when temporary TZ did not include DST
755 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
756 [19270] math: [hppa] Shared libm missing __isnanl
757 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
758 MAP_HUGETLB and MAP_STACK defines
759 [19313] nptl: Wrong __cpu_mask for x32
760 [19347] libc: grantpt: try to force a specific gid even without pt_chown
761 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
762 [19350] math: [ldbl-128ibm] sinhl spurious overflows
763 [19351] math: [ldbl-128ibm] logl inaccurate near 1
764 [19363] time: x32: times() return value wrongly truncates/sign extends
766 [19367] dynamic-link: Improve branch prediction on Silvermont
767 [19369] network: Default domain name not reset by res_ninit when "search"
768 / "domain" entry is removed from resolv.conf
769 [19375] math: powerpc: incorrect results for POWER7 logb with negative
771 [19385] localedata: bg_BG: time separator should be colon, not comma
772 [19408] libc: linux personality syscall wrapper may erroneously return an
773 error on 32-bit architectures
774 [19415] libc: dladdr returns wrong names on hppa
775 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
776 IBM905, IBM907, and IBM909
777 [19439] math: Unix98 isinf and isnan functions conflict with C++11
778 [19443] build: build failures with -DDEBUG
779 [19451] build: Make check fails on test-double-vlen2
780 [19462] libc: Glibc failed to build with -Os
781 [19465] math: Wrong code with -Os
782 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
784 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
786 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
787 [19486] math: S390: Math tests fail with "Exception Inexact set".
788 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
789 [19550] libc: [mips] mmap negative offset handling inconsistent with other
791 [19590] math: Fail to build shared objects that use libmvec.so functions.
795 * The following bugs are resolved with this release:
797 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
798 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
799 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
800 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
801 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
802 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
803 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
804 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
805 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
806 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
807 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
808 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
809 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
810 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
811 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
812 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
813 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
814 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
815 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
816 18657, 18676, 18694, 18696, 18887.
818 * Cache information can be queried via sysconf() function on s390 e.g. with
819 _SC_LEVEL1_ICACHE_SIZE as argument.
821 * A buffer overflow in gethostbyname_r and related functions performing DNS
822 requests has been fixed. If the NSS functions were called with a
823 misaligned buffer, the buffer length change due to pointer alignment was
824 not taken into account. This could result in application crashes or,
825 potentially arbitrary code execution, using crafted, but syntactically
826 valid DNS responses. (CVE-2015-1781)
828 * The time zone file parser has been made more robust against crafted time
829 zone files, avoiding heap buffer overflows related to the processing of
830 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
831 large time zone data files. Overly long time zone specifiers in the TZ
832 variable no longer result in stack overflows and crashes.
834 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
835 for LD and GD on x86 and x86-64, has been implemented. You will need
836 binutils-2.24 or later to enable this optimization.
838 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
839 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
840 Hat). These updates cause user visible changes, such as the fix for bug
843 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
844 and getXXbyYY NSS calls for the same database, causing a denial-of-service
845 condition in some applications.
847 * Added vector math library named libmvec with the following vectorized x86_64
848 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
850 The library can be disabled with --disable-mathvec. Use of the functions is
851 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
852 Shared library libmvec.so is linked in as needed when using -lm (no need to
853 specify -lmvec explicitly for not static builds).
854 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
856 * A new fmemopen implementation has been added with the goal of POSIX
857 compliance. The new implementation fixes the following long-standing
858 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
859 old implementation is still present for use be by existing binaries.
861 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
862 releases. It has been fixed to match 2.19 and older, but binaries built
863 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
865 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
866 Contributed by Roland McGrath (Google).
868 * The header <regexp.h> is deprecated, and will be removed in a future
869 release. Use of this header will trigger a deprecation warning.
870 Application developers should update their code to use <regex.h> instead.
872 This header was formerly part of SUS, but was deprecated in 1994 and
873 removed from the standard in 2001. Also, the glibc implementation
874 leaks memory. See BZ#18681 for more details.
878 * The following bugs are resolved with this release:
880 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
881 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
882 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
883 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
884 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
885 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
886 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
887 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
888 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
889 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
892 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
893 too little memory for the to-be-scanned arguments and overflow the
894 allocated buffer. The implementation now correctly computes the required
895 buffer size when using malloc, and switches to malloc from alloca as
898 * A new semaphore algorithm has been implemented in generic C code for all
899 machines. Previous custom assembly implementations of semaphore were
900 difficult to reason about or ensure that they were safe. The new version
901 of semaphore supports machines with 64-bit or 32-bit atomic operations.
902 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
903 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
905 * Port to Altera Nios II has been contributed by Mentor Graphics.
907 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
908 implementations for powerpc64/powerpc64le.
909 Implemented by Adhemerval Zanella (IBM).
911 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
912 and powerpc64le. This may improve lock scaling of existing programs on
913 HTM capable systems. The lock elision code is only enabled with
914 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
915 powerpc will issue a transaction abort on every syscall to avoid side
916 effects being visible outside transactions.
918 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
919 AArch64. Contributed by ARM Ltd.
921 * i386 memcpy functions optimized with SSE2 unaligned load/store.
923 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
924 under certain input conditions resulting in the execution of a shell for
925 command substitution when the application did not request it. The
926 implementation now checks WRDE_NOCMD immediately before executing the
927 shell and returns the error WRDE_CMDSUB as expected.
929 * CVE-2012-3406 printf-style functions could run into a stack overflow when
930 processing format strings with a large number of format specifiers.
932 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
933 infinite loop if the DNS response contained a PTR record of an unexpected
936 * The minimum GCC version that can be used to build this version of the GNU
937 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
938 still be used to compile programs using the GNU C Library.
940 * The GNU C Library is now built with -Werror by default. This can be
941 disabled by configuring with --disable-werror.
943 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
945 * The obsolete sigvec function has been removed. This was the original
946 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
947 programs have been using instead for about 25 years. Of course, ABI
948 compatibility for old binaries using sigvec remains intact.
950 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
951 with newer versions of bison.
953 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
954 The original MIPS o32 hard-float ABI requires an FPU where double-precision
955 registers overlay two consecutive single-precision registers. MIPS32R2
956 introduced a new FPU mode (FR=1) where double-precision registers extend the
957 corresponding single-precision registers which is incompatible with the
958 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
959 require the use of FR=1 making a transition necessary. New o32 ABI
960 extensions enable users to migrate over time from the original o32 ABI
961 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
962 tracks the ABI of any loaded object and verifies that new objects are
963 compatible. Mode transitions will also be requested as required and
964 unsupportable objects will be rejected. The ABI checks include both soft and
965 hard float ABIs for o32, n32 and n64.
967 GCC 5 with GNU binutils 2.25 onwards:
968 It is strongly recommended that all o32 system libraries are built using the
969 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
970 with the original and all new o32 ABI extensions. Configure a MIPS GCC
971 compiler using --with-fp-32=xx to set this by default.
975 * The following bugs are resolved with this release:
977 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
978 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
979 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
980 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
981 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
982 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
983 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
984 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
985 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
986 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
987 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
988 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
989 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
990 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
991 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
993 * Reverted change of ABI data structures for s390 and s390x:
994 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
995 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
996 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
997 are preserved pointing straight to the same implementation as the old ones.
998 Given that, new callers will simply provide a too-big buffer to these
999 functions. Any applications/libraries out there that embed jmp_buf or
1000 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1001 against 2.19 headers will have to rebuilt again. This is necessary in any
1002 case to revert the breakage in their ABI caused by the glibc change.
1004 * Support for file description locks is added to systems running the
1005 Linux kernel. The standard file locking interfaces are extended to
1006 operate on file descriptions, not file descriptors, via the use of
1007 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1008 are associated with an open file instead of a process.
1010 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1012 * The minimum Linux kernel version that this version of the GNU C Library
1013 can be used with is 2.6.32.
1015 * Running the testsuite no longer terminates as soon as a test fails.
1016 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1017 with PASS or FAIL lines for individual tests. A summary of the results is
1018 printed, including a list of failing lists, and "make check" exits with
1019 error status if there were any unexpected failures. "make check
1020 stop-on-test-failure=y" may be used to keep the old behavior.
1022 * The am33 port, which had not worked for several years, has been removed
1025 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1026 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1027 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1028 conflicted with POSIX (support for which was removed in 2.19), the
1029 interfaces those macros enabled remain available when compiling with
1030 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1031 test macros defined.
1033 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1035 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1036 This may improve lock scaling of existing programs on TX capable systems.
1037 The lock elision code is only built with --enable-lock-elision=yes and
1038 then requires a GCC version supporting the TX builtins. With lock elision
1039 default mutexes are elided via __builtin_tbegin, if the cpu supports
1040 transactions. By default lock elision is not enabled and the elision code
1043 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1044 copy the path argument. This allowed programs to cause posix_spawn to
1045 deference a dangling pointer, or use an unexpected pathname argument if
1046 the string was modified after the posix_spawn_file_actions_addopen
1049 * All supported architectures now use the main glibc sysdeps directory
1050 instead of some being in a separate "ports" directory (which was
1051 distributed separately before glibc 2.17).
1053 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1054 On configurations that support it (all Linux configurations), it's now
1055 used regardless of the --enable-add-ons switch to configure. It is no
1056 longer possible to build such configurations without pthreads support.
1058 * Locale names, including those obtained from environment variables (LANG
1059 and the LC_* variables), are more tightly checked for proper syntax.
1060 setlocale will now fail (with EINVAL) for locale names that are overly
1061 long, contain slashes without starting with a slash, or contain ".." path
1062 components. (CVE-2014-0475) Previously, some valid locale names were
1063 silently replaced with the "C" locale when running in AT_SECURE mode
1064 (e.g., in a SUID program). This is no longer necessary because of the
1067 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1068 with application code using Intel MPX instructions. (With all previous
1069 versions, the MPX register state could be clobbered when making calls
1070 into or out of a shared library.) Note that while the new dynamic
1071 linker is compatible with all known x86 hardware whether or not it
1072 supports Intel MPX, some x86 instruction-set emulators might fail to
1073 handle the new instruction encodings. This is known to affect Valgrind
1074 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1075 release), and might affect other tools that do instruction emulation.
1077 * Support for loadable gconv transliteration modules has been removed.
1078 The support for transliteration modules has been non-functional for
1079 over a decade, and the removal is prompted by security defects. The
1080 normal gconv conversion modules are still supported. Transliteration
1081 with //TRANSLIT is still possible, and the //IGNORE specifier
1082 continues to be supported. (CVE-2014-5119)
1084 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1085 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1086 resulting a denial-of-service security vulnerability in applications which
1087 use functions related to iconv. (CVE-2014-6040)
1091 * The following bugs are resolved with this release:
1093 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1094 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1095 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1096 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1097 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1098 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1099 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1100 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1101 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1102 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1103 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1104 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1105 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1106 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1107 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1108 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1109 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1110 16431, 16453, 16474, 16506, 16510, 16529
1112 * Slovenian translations for glibc messages have been contributed by the
1113 Translation Project's Slovenian team of translators.
1115 * The public headers no longer use __unused nor __block. This change is to
1116 support compiling programs that are derived from BSD sources and use
1117 __unused internally, and to support compiling with Clang's -fblock
1118 extension which uses __block.
1120 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1121 large collation sequences to optimize multiple passes. This cache
1122 computation may overflow for large collation sequences and may cause a
1123 stack or buffer overflow. This is now fixed to use a slower algorithm
1124 which does not use a cache if there is an integer overflow.
1126 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1127 rules for large collation sequences to optimize multiple passes and falls
1128 back to alloca if malloc fails, resulting in a possible stack overflow.
1129 The implementation now falls back to an uncached collation sequence lookup
1132 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1133 initialized for static applications resulting in the security feature
1134 being disabled. The pointer guard is now correctly initialized to a
1135 random value for static applications. Existing static applications need
1136 to be recompiled to take advantage of the fix (bug 15754).
1138 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1139 to the d_name member of struct dirent, or omit the terminating NUL
1140 character. (Bugzilla #14699).
1142 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1143 aligned_alloc functions could allocate too few bytes or corrupt the
1144 heap when passed very large allocation size values (Bugzilla #15855,
1147 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1148 for AF_INET6 has been fixed (Bugzilla #16072).
1150 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1151 pap_CW, quz_PE, the_NP.
1153 * Substantially revised locales: gd_GB, ht_HT
1155 * The LC_ADDRESS field was updated to support country_car for almost all
1158 * ISO 1427 definitions were updated.
1160 * ISO 3166 definitions were updated.
1162 * The localedef utility now supports --big-endian and --little-endian
1163 command-line options to generate locales for a different system from that
1164 for which the C library was built.
1166 * Binary locale files now only depend on the endianness of the system for
1167 which they are generated and not on other properties of that system. As a
1168 consequence, binary files generated with new localedef may be incompatible
1169 with old versions of the GNU C Library, and binary files generated with
1170 old localedef may be incompatible with this version of the GNU C Library,
1171 in the following circumstances:
1173 + Locale files may be incompatible on m68k systems.
1175 + Locale archive files (but not separate files for individual locales) may
1176 be incompatible on systems where plain "char" is signed.
1178 * The configure option --disable-versioning has been removed. Builds with
1179 --disable-versioning had not worked for several years.
1181 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1182 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1184 * SystemTap probes for malloc have been introduced.
1186 * SystemTap probes for slow multiple precision fallback paths of
1187 transcendental functions have been introduced.
1189 * Support for powerpc64le has been added.
1191 * The soft-float powerpc port now supports e500 processors.
1193 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1195 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1196 set of header declarations that are enabled by default, even when other
1197 feature test macros or compiler options such as -std=c99 would otherwise
1198 disable some of those declarations.
1200 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1201 conflict with POSIX. The libbsd-compat library (which was a dummy library
1202 that did nothing) has also been removed.
1204 * Preliminary documentation about Multi-Thread, Async-Signal and
1205 Async-Cancel Safety has been added.
1207 * Change of ABI data structures for s390 and s390x:
1208 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1209 allow for future hardware extensions. All library functions that accept or
1210 return these structures were versioned in order to provide backwards
1211 compatibility with existing code. However, not all cases can be handled
1212 with interface versioning. If an application embeds either structure into
1213 another structure and that structure is passed to another compilation unit
1214 which expects the newer larger-sized object then any access to the new
1215 fields will result in undefined behaviour. Similarly any access to fields
1216 that were moved by the enlarging of the structures will cause undefined
1217 behaviour. To fix the undefined behaviour all objects that are part of the
1218 final in-memory image must agree on the size of structures, and this may
1219 require recompilation.
1223 * The following bugs are resolved with this release:
1225 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1226 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1227 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1228 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1229 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1230 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1231 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1232 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1233 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1234 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1235 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1236 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1237 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1240 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1241 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1242 Distributions can re-enable building and using pt_chown via the new configure
1243 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1244 considerable security risks and should only be used if the distribution
1245 understands and accepts the risks.
1247 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1250 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1251 fixed (Bugzilla #15330).
1253 * Add support for calling C++11 thread_local object destructors on thread
1254 and program exit. This needs compiler support for offloading C++11
1255 destructor calls to glibc.
1257 * Improved worst case performance of libm functions with double inputs and
1260 * Support for priority inherited mutexes in pthread condition variables on
1261 non-x86 architectures.
1263 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1265 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1267 * Optimized string functions for ARM. Implemented by Will Newton and
1270 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1272 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1275 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1276 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1278 * Added a benchmark framework to track performance of functions in glibc.
1280 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1281 It is based on draft TS 18661 and currently enabled as a GNU extension.
1283 * On Linux, the clock function now uses the clock_gettime system call
1284 for improved precision, rather than old times system call.
1286 * Added support for version-3 tz format files. This is needed when using
1287 the tz database release 2013e or later, and affects a few unusual cases --
1288 currently only TZ='America/Godthab' for time stamps after 2037.
1290 * Added new API functions pthread_getattr_default_np and
1291 pthread_setattr_default_np to get and set the default pthread
1292 attributes of a process.
1294 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1295 This may improve lock scaling of existing programs on TSX capable systems.
1296 When the --enable-lock-elision=yes parameter is specified at configure
1297 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1300 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1301 availability). Implemented by Ryan S. Arnold.
1303 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1307 * The following bugs are resolved with this release:
1309 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1310 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1311 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1312 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1313 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1314 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1315 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1316 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1317 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1318 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1319 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1320 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1321 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1322 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1323 14879, 14889, 14893, 14898, 14914.
1325 * Optimization of memcpy for MIPS.
1327 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1328 EMFILE has been fixed (Bugzilla #14889).
1330 * The add-on ports collection is now distributed in the "ports" subdirectory
1331 of the main GNU C Library distribution, rather than separately.
1333 * Port to ARM AArch64 contributed by Linaro.
1335 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1336 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1338 Implemented by Andreas Krebbel.
1340 * The new function secure_getenv allows secure access to the environment,
1341 returning NULL if running in a SUID/SGID process. This function replaces
1342 the internal function __secure_getenv.
1344 * SystemTap static probes have been added into the dynamic linker.
1345 Implemented by Gary Benson.
1347 * Optimizations of string functions strstr, strcasestr and memmem.
1348 Implemented by Maxim Kuvyrkov.
1350 * The minimum Linux kernel version that this version of the GNU C Library
1351 can be used with is 2.6.16.
1353 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1354 powerpc POWER7. Implemented by Will Schmidt.
1356 * New configure option --disable-nscd builds the C library such that it
1357 never attempts to contact the Name Service Caching Daemon (nscd).
1358 New configure option --disable-build-nscd avoids building nscd itself;
1359 this is the default if --disable-nscd is used.
1361 * Improved support for cross-compilation, including cross-testing and
1362 bootstrap builds without a previously built glibc.
1364 * Several testsuite tests are now able to test multiple IFUNC variants of an
1365 interface, rather than just testing the one that would be chooen by
1368 * New configure options --with-bugurl and --with-pkgversion, for
1369 distributors to use to embed their bug-reporting and package version
1370 information in --help and --version output.
1372 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1373 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1374 allows creation of chroots without the procfs mounted on /proc.
1376 * The `crypt' function now fails if passed salt bytes that violate the
1377 specification for those values. On Linux, the `crypt' function will
1378 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1379 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1380 when the mode is enabled.
1382 * The `clock_*' suite of functions (declared in <time.h>) is now available
1383 directly in the main C library. Previously it was necessary to link with
1384 -lrt to use these functions. This change has the effect that a
1385 single-threaded program that uses a function such as `clock_gettime' (and
1386 is not linked with -lrt) will no longer implicitly load the pthreads
1387 library at runtime and so will not suffer the overheads associated with
1388 multi-thread support in other code such as the C++ runtime library.
1390 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1395 * The following bugs are resolved with this release:
1397 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1398 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1399 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1400 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1401 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1402 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1403 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1404 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1405 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1406 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1407 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1408 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1409 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1410 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1411 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1412 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1413 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1414 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1415 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1416 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1417 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1418 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1421 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1422 configuring glibc with:
1423 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1424 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1425 Implemented by H.J. Lu.
1429 + define static_assert
1431 + do not declare gets
1433 + declare at_quick_exit and quick_exit also for ISO C11
1435 + aligned_alloc. NB: The code is deliberately allows the size parameter
1436 to not be a multiple of the alignment. This is a moronic requirement
1437 in the standard but it is only a requirement on the caller, not the
1440 + timespec_get added
1442 + uchar.h support added
1444 + CMPLX, CMPLXF, CMPLXL added
1446 Implemented by Ulrich Drepper.
1448 * Support for the IA-64 has been moved to ports.
1450 * Remove support for anything but ELF binary format
1452 * Checking versions of poll, ppoll added.
1453 Implemented by Ulrich Drepper.
1455 * More generic and 64-bit performance optimizations to math functions.
1456 Implemented by Ulrich Drepper.
1458 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1459 headers and functions available at compile time as they were before
1460 version 2.14. This option will be removed at some time in the future
1461 after the TI-RPC library becomes fully sufficient for the needs of
1462 existing applications.
1464 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1465 Note that glibc is not expected to work with any Linux kernel version
1468 * New header <sys/auxv.h> and function getauxval allowing easy access to
1469 the AT_* key-value pairs passed from the Linux kernel. The header also
1470 defines the HWCAP_* bits associated with the AT_HWCAP key.
1472 * New locales: mag_IN
1474 * New configure option --enable-systemtap builds SystemTap static probes
1475 into libc for setjmp and longjmp and into libpthread for various operations.
1476 So far the setjmp/longjmp probes and some of the libpthread probes are
1477 provided only for i*86 and x86_64.
1478 Implemented by Roland McGrath and Rayson Ho.
1480 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1482 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1485 * More optimized functions for SPARC. Implemented by David S. Miller.
1487 * Improved support for cross-compilation, especially bootstrap builds
1488 without a previously built glibc.
1490 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1491 Chris Metcalf from Tilera.
1493 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1494 now supported for ARM processors.
1496 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1497 as the name of the dynamic linker, to distinguish it from the
1498 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1500 * Support for CRIS has been removed from ports.
1502 * A new class of installed header has been documented for low-level
1503 platform-specific functionality. PowerPC added the first instance with a
1504 function to provide time base register access. Contributed by Tulio
1505 Magno Quites Machado Filho.
1507 * ix86 configurations now install header files that are consistent with
1508 what x86-64 configurations install. These same header files can be used
1509 for -m32, -m64, or -mx32 builds.
1510 Contributed by H.J. Lu.
1512 * Math library bug fixes. A thorough audit of all open math library bugs was
1513 conducted by Joseph Myers. Significant progress was made on many math
1514 library bugs resulting in more accurate exceptions and function results.
1515 Many thanks to all those that contributed including Andreas Jaeger for his
1516 patch review and work on the x87 trigonometric instruction issues.
1518 * Timezone data is no longer installed. Timezone-related binaries and scripts
1519 will continue to be installed. Users should obtain their timezone data from
1520 their distribution provider or from the tzdata package at
1521 <ftp://munnari.oz.au/pub/>.
1525 * The following bugs are resolved with this release:
1527 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1528 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1529 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1530 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1531 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1532 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1533 13484, 13506, 13515, 13523, 13524, 13538, 13540
1535 * New program pldd to list loaded object of a process
1536 Implemented by Ulrich Drepper.
1538 * Add nss_db support back to glibc. No more dependency on Berkeley db
1539 and support for initgroups lookups.
1540 Implemented by Ulrich Drepper.
1542 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1543 Contributed by HJ Lu.
1545 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1546 Contributed by HJ Lu.
1548 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1549 on x86-32 and x86-64.
1550 Contributed by Liubov Dmitrieva.
1552 * Optimized strchr and strrchr for SSE on x86-32.
1553 Contributed by Liubov Dmitrieva.
1555 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1556 for x86-64 and x86-32.
1557 Contributed by Liubov Dmitrieva.
1559 * New interfaces: scandirat, scandirat64
1560 Implemented by Ulrich Drepper.
1562 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1563 Implemented by Ulrich Drepper.
1565 * nscd now also caches the netgroup database.
1566 Implemented by Ulrich Drepper.
1568 * Integrate libm with gcc's -ffinite-math-only option.
1569 Implemented by Ulrich Drepper.
1571 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1572 to math functions. Implemented by Ulrich Drepper.
1574 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1575 Implemented by Ulrich Drepper.
1577 * New Linux interfaces: process_vm_readv, process_vm_writev
1579 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1580 Implemented by Ulrich Drepper.
1582 * Optimized nearbyint and strcasecmp for PPC.
1583 Implemented by Adhemerval Zanella.
1585 * New locales: bho_IN, unm_US, es_CU, ta_LK
1589 * The following bugs are resolved with this release:
1591 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1592 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1593 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1594 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1595 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1596 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1597 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1598 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1599 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1600 12795, 12811, 12813, 12814, 12841
1602 * The RPC implementation in libc is obsoleted. Old programs keep working
1603 but new programs cannot be linked with the routines in libc anymore.
1604 Programs in need of RPC functionality must be linked against TI-RPC.
1605 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1607 Visible changes of this change include (obviously) the inability to link
1608 programs using RPC functions without referencing the TI-RPC library and the
1609 removal of the RPC headers from the glibc headers.
1610 Implemented by Ulrich Drepper.
1612 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1613 syncfs, setns, sendmmsg
1615 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1616 yue_HK, lij_IT, mhr_RU
1618 * New encodings: CP770, CP771, CP772, CP773, CP774
1620 * New program sotruss to trace calls through PLTs
1621 Implemented by Ulrich Drepper.
1623 * The malloc hook implementation is marked deprecated and will be removed
1624 from the default implementation in the next version. The design never
1625 worked ever since the introduction of threads. Even programs which do
1626 not create threads themselves can use multiple threads created internally.
1630 * The following bugs are resolved with this release:
1632 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1633 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1634 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1635 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1638 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1640 * POWER7 optimizations: memset, memcmp, strncmp
1642 * New optimized string functions for x86-64: strnlen (SSE2),
1643 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1644 Implemented by Ulrich Drepper.
1648 * The following bugs are resolved with this release:
1650 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1651 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1652 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1653 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1654 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1655 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1656 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1657 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1659 * New interfaces: pthread_getname_np, pthread_setname_np
1661 * New Linux interface: recvmmsg
1663 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1665 * The dynamic linker now recognizes supported ABI versions from the
1666 EI_ABIVERSION field in the ELF header.
1667 Implemented by Ulrich Drepper.
1669 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1670 will not be used to fill in password fields in the passwd.byname replies.
1671 Instead it is used to synthesize the shadow.byname table, should it be
1672 missing. This is a useful mode in some installations involving Solaris.
1673 Implemented by Ulrich Drepper.
1675 * New locales: kok_IN, sq_MK, cv_RU
1679 * The following bugs are resolved with this release:
1681 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1682 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1683 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1684 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1685 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1686 10789, 10817, 10823, 10840, 10847
1688 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1690 Implemented by Ulrich Drepper.
1692 * Checking version of longjmp added that fails if an uninitialized stack
1693 frame would be created. Implemented by Ulrich Drepper.
1695 * STT_GNU_IFUNC is now supported in static executables.
1696 Implemented by H.J. Lu.
1698 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1700 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1701 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1702 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1703 Contributed by H.J. Lu.
1705 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1706 Implemented by Ulrich Drepper.
1708 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1710 Contributed by H.J. Lu.
1712 * Support for fma instruction in AVX on x86-64.
1713 Implemented by H.J. Lu and Ulrich Drepper.
1715 * AVX support in x86-64 auditing support in ld.so.
1716 Implemented by H.J. Lu.
1718 * STB_GNU_UNIQUE support added.
1719 Implemented by Ulrich Drepper.
1721 * Implement second fallback mode for optimized DNS lookup for even more
1722 broken environments. If two requests from the same port are not
1723 handled correctly close the socket and open a new one before sending
1724 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1725 can be used to select this mode right away, instead of rediscovering the
1726 necessity is every process again.
1727 Implemented by Ulrich Drepper.
1729 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1730 Implemented by Adam Tkac.
1732 * Optimized iconv conversions for S390x.
1733 Implemented by Andreas Krebbel.
1735 * Using condvars with PI mutexes is now more efficient due to kernel
1736 support for requeueing to PI futexes. NPTL support added for x86-64.
1737 Implemented by Ulrich Drepper.
1739 * New locales: ps_AF, my_MM
1743 * The following bugs are resolved with this release:
1745 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1746 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1747 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1748 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1749 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1751 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1752 Implemented by Ulrich Drepper.
1754 * New Linux interfaces: accept4, fallocate, fallocate64.
1755 Implemented by Ulrich Drepper.
1757 * Correct declarations of string function when used in C++ code. This
1758 could lead to compile errors for invalid C++ code.
1760 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1763 * New POSIX 2008 interface: psiginfo
1764 Implemented by Ulrich Drepper.
1766 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1767 Implemented by Ulrich Drepper.
1769 * Support for selecting between multiple function definitions at runtime
1770 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1772 * The libcrypt library can now use the hash function implementations in
1773 NSS. Implemented by Ulrich Drepper.
1775 * The malloc implementation can be compiled to be less memory efficient
1776 but higher performing in multi-threaded programs.
1777 Implemented by Ulrich Drepper.
1779 * New locales: nan_TW@latin, ks_IN
1781 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1782 Implemented by Ulrich Drepper.
1784 * Extended printf hook support. It is possible to use user-defined types
1785 and extend existing format specifiers.
1786 Implemented by Ulrich Drepper.
1788 * Handling for group shadow files has been added.
1789 Implemented by Ulrich Drepper.
1791 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1792 servers (the case, e.g., for some people using the built-in DNS
1793 server in ADSL modems/routers). There is a once-per-process timeout
1794 in case of a broken server. To avoid it, users can run nscd or put
1795 'options single-request' in /etc/resolv.conf.
1796 Implemented by Ulrich Drepper.
1800 * The following bugs are resolved with this release:
1802 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1803 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1804 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1805 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1806 6968, 6974, 6980, 6995, 7008, 7009, 7029
1808 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1809 up at the same time. Implemented by Ulrich Drepper.
1811 * TLS descriptors for LD and GD on x86 and x86-64.
1812 Implemented by Alexandre Oliva.
1814 * getaddrinfo now handles DCCP and UDPlite.
1815 Implemented by Ulrich Drepper.
1817 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1818 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1819 Implemented by Ulrich Drepper.
1821 * New implementation of memmem, strstr, and strcasestr which is O(n).
1822 Implemented by Eric Blake.
1824 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1826 * Implement "e" option for popen to open file descriptor with the
1827 close-on-exec flag set. Implemented by Ulrich Drepper.
1829 * Implement "b" mode for fmemopen. In this mode writes writes don't
1830 implicitly add a NUL byte and seeks from the end of the buffer really
1831 use the buffer end, not the string length as the basis.
1832 Implemented by Ulrich Drepper.
1834 * Many functions, exported and internal, now atomically set the close-on-exec
1835 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1837 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1839 Implemented by Pravin Satpute.
1841 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1845 * The following bugs are resolved with this release:
1847 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1848 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1849 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1850 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1851 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1852 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1853 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1855 * New locales: bo_CN, bo_IN, shs_CA.
1857 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1859 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1860 Implemented by Pravin Satpute.
1862 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1864 * nscd caches now all timeouts for DNS entries
1865 Implemented by Ulrich Drepper.
1867 * nscd is more efficient and wakes up less often.
1868 Implemented by Ulrich Drepper.
1870 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1871 vdprintf, and obstack_vprintf.
1872 Implemented by Jakub Jelinek.
1874 * Faster memset for x86-64.
1875 Implemented by Harsha Jagasia and H.J. Lu.
1877 * Faster memcpy on x86.
1878 Implemented by Ulrich Drepper.
1880 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1881 Implemented by Ulrich Drepper.
1883 * Faster sqrt and sqrtf implemention for some PPC variants.
1884 Implemented by Steven Munroe.
1888 * The following bugs are resolved with this release:
1890 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1891 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1892 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1893 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1894 5071, 5103, 5104, 5112, 5113, 5184, 5186
1896 * More checking functions: fread, fread_unlocked, open*, mq_open.
1897 Implemented by Jakub Jelinek and Ulrich Drepper.
1899 * Extend fortification to C++. Implemented by Jakub Jelinek.
1901 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1902 by not recognizing 'a' as a modifier when those specs are requested.
1903 Implemented by Jakub Jelinek.
1905 * PPC optimizations to math and string functions.
1906 Implemented by Steven Munroe.
1908 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1909 options to be passed. Implemented by Ulrich Drepper.
1911 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1913 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1914 Implemented by Ulrich Drepper.
1916 * Handle private futexes in the NPTL implementation.
1917 Implemented by Jakub Jelinek and Ulrich Drepper.
1919 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1920 Implemented by Roland McGrath and Ulrich Drepper.
1922 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1924 * SHA-256 and SHA-512 based password encryption.
1925 Implemented by Ulrich Drepper.
1927 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1928 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1931 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1932 Implemented by Ulrich Drepper.
1936 * The following bugs are resolved with this release:
1938 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1939 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1940 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1941 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1942 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1943 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1944 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1947 * New Linux interfaces: epoll_pwait, sched_getcpu.
1949 * New generic interfaces: strerror_l.
1951 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1955 * The following bugs are resolved with this release:
1957 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1958 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1959 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1960 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1961 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1962 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1963 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1964 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1965 3225, 3251, 3252, 3253, 3273
1967 * For Linux, the sorting of addresses returned by getaddrinfo now also
1968 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1969 Implemented by Ulrich Drepper.
1971 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1972 Implemented by Ulrich Drepper.
1974 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1976 * New iconv module for MIK. Contributed by Alexander Shopov.
1978 * For sites with broken group and/or passwd database, the auto-propagate
1979 option of nscd can prevent creating ID lookup entries from the results
1980 of a name lookup and vice versa. This usually is no problem but some
1981 site might have problems with the default behavior.
1982 Implemented by Ulrich Drepper.
1984 * Iterating over entire database in NIS can be slow. With the
1985 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1986 to trade time for memory. The entire database will be read at once.
1987 Implemented by Ulrich Drepper.
1989 * The interfaces introduced in RFC 3542 have been implemented by
1992 * Support for the new ELF hash table format was added by Ulrich Drepper.
1994 * Support for priority inheritance mutexes added by Jakub Jelinek and
1997 * Support for priority protected mutexes added by Jakub Jelinek.
1999 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2000 or_IN, csb_PL, fy_NL, sr_ME.
2004 * More overflow detection functions.
2006 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2007 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2009 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2010 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2011 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2012 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2013 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2014 by Masahide Washizawa.
2016 * It is now possible to install audit libraries for the dynamic linker using
2017 LD_AUDIT. Implemented by Ulrich Drepper.
2019 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2020 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2021 For a libc and libpthread that works well on Linux 2.4 kernels, we
2022 recommend using the stable 2.3 branch.
2024 * The new function open_wmemstream acts like open_memstream,
2025 but uses a wchar_t wide character buffer.
2027 * The new function ppoll is an improved version of poll, similar to pselect.
2029 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2030 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2031 renameat, unlinkat, linkat, symlinkat, readlinkat.
2033 * New Linux kernel system calls: unshare,
2034 inotify_init, inotify_add_watch, inotify_rm_watch.
2036 * The euidaccess function is now also known by the alias eaccess,
2037 for compatibility with some other systems.
2039 * Timezone data updated to 2006b version.
2043 * The following bugs are resolved with this release:
2045 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2046 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2047 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2048 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2049 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2050 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2052 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2054 * As of this release, GCC 4 can be used to compile the C Library.
2056 * Timezone data updated to 2005m version.
2060 * The following bugs are resolved with this release:
2062 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2063 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2064 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2065 777, 787, 821, 822, 823, 825
2067 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2071 * Support for RFC 3678. Real implementations exist only for Linux so far.
2072 Implemented by Ulrich Drepper.
2074 * nscd can now cache entries persistently. Expiring entries are reloaded.
2075 For speedups the cache can be shared in memory with client processes.
2076 Implemented by Ulrich Drepper.
2078 * nscd can now perform SELinux checks.
2079 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2081 * getaddrinfo queries are now cached. Canonical name lookup is performed
2083 Implemented by Ulrich Drepper.
2085 * The nothrow function attribute is used when headers are used by gcc when
2086 compiling C code. This can avoid significant amounts of exception
2089 * The malloc functions perform more error checking and are stricter when
2090 it comes to reacting on errors. The default action is to terminate
2091 the process after showing an error message. Implemented by Ulrich Drepper.
2093 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2094 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2096 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2097 namespaces using the new function dlmopen(). This feature is of course,
2098 like most other dynamic loading functionality, not available in statically
2099 linked applications. Implemented by Ulrich Drepper.
2101 * Low-overhead boundary checking variants of string and some stdio functions
2102 were added. These are to be used in conjunction with a gcc patch by
2103 Jakub Jelinek which adds calls to these functions if possible.
2104 Implemented by Jakub Jelinek and Ulrich Drepper.
2106 * Old code for several operating systems and machine architectures that
2107 have not been in working condition in a long time have been removed from
2108 the main source tree maintained by the GNU C Library's maintainers.
2109 These files are now reside in the separate `ports' source module
2110 that is usable as an add-on when building the library.
2114 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2115 interrogate the dynamic linker, compatible with the Solaris interface.
2117 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2118 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2120 * getifaddrs now uses the netlink interface on Linux to get its information.
2121 Implemented by Thorsten Kukuk.
2123 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2124 Implemented by Ulrich Drepper.
2126 * support for non-executable stacks on x86 has been added. Changes mostly
2129 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2132 * getaddrinfo now performs destination address selection according to
2137 * Thread-safe interfaces for many functions that access locale data
2138 were added in version 2.3, but these features were omitted from NEWS.
2139 Many functions have variants with an `_l' suffix that take a `locale_t'
2140 object as a parameter rather than consulting the current locale.
2141 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2142 create and maintain `locale_t' objects. Additionally, the new function
2143 `uselocale' sets "the current locale" (as used by functions not so
2144 parameterized) set for an individual thread. These features were added
2145 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2147 * The functions getresuid, getresgid, setresuid, and setresgid, which
2148 have long been available on Linux, are now declared in <unistd.h>
2149 and are now also available on the Hurd.
2151 * ELF thread-local storage support (TLS) now works on x86-64.
2153 * The new dynamic string token $LIB is expanded in shared library names.
2154 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2156 * Aldy Hernandez contributed complete software floating point support for
2157 PowerPC machines with no FPU.
2159 * fexecve is implemented on Linux.
2161 * The `btowc' function should work at least twice as fast due to
2162 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2164 * With approriate thread add-ons cancelable functions are now implemented
2165 in libc.so as well. No need to call the function in libpthread. This
2166 change allowed to finally disable the incorrect and expensive handling
2167 of weak definition in ld.so.
2169 * Yet more PLT entries in libc.so have been removed. We finally arrived
2170 at the bare minimum. Startup times improved appropriately.
2172 * Support for the new Linux/x86 system call interface was added. The
2173 AT_SYSINFO auxiliary vector entry is recognized and handled.
2177 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2180 * iconv (the program and the interface) now accepts empty names (excluding
2181 options like //TRANSLIT) to mean "use charset of current locale".
2183 * localedef can now transliterate characters in strings which are not in
2184 the provided charmap. The information from the input locale is used.
2186 * Prelinking support was added for ELF targets. This requires additional
2187 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2189 * Read-only stdio streams now use mmap to speed up operation by eliminating
2190 copying and buffer underflows. To use add 'm' to the mode string of
2191 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2193 * The malloc functions were completely rewritten by Wolfram Gloger based
2194 on Doug Lea's malloc-2.7.0.c.
2196 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2197 implementation of regex.
2199 * Bruno Haible upgraded the iconv and locale implementation to support
2202 * Contents of the LC_* and LANG environment variables in the CEN style are
2203 not recognized anymore. It never was used. Change by Ulrich Drepper.
2205 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2206 thread-local storage (TLS) ABI on some platforms.
2207 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2209 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2210 EUC-JISX0213, and TSCII.
2212 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2213 BSD-compatible interface for getting all network interface addresses.
2214 Implementation for IPv4 by Roland McGrath.
2216 * Loading of locale data is faster due to the introduction of a locale
2217 archive. Implemented by Roland McGrath and Ulrich Drepper.
2219 * Startup times are significantly reduced by not using exported functions
2220 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2223 * Steven Munroe contributed a port to PowerPC64/Linux.
2227 * The Hurd now uses the GNU libio implementation of stdio rather than the
2228 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2230 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2231 with the same behavior as the Linux system call of the same name.
2235 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2236 128-bit long double format.
2238 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2239 IBM1161, and IBM1162 charsets.
2241 * Andreas Jaeger contributed a port to x86-64/Linux.
2243 * Peter Bruin contributed a port to PowerPC/Hurd.
2245 * libc functions using I/O streams now can handle wide-oriented streams
2248 * optimizations in the dynamic linker. Binaries created by recent binutils
2249 versions start up quicker due to reduced time spent on relocations.
2251 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2255 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2256 asinh, atanh, j0 for the 128-bit long double format.
2258 * Bruno Haible updated all the code handling Unicode in some form to
2259 support Unicode 3.1.
2261 * Speed of regex for single-byte locales is back to previous levels.
2262 Patch by Isamu Hasegawa.
2264 * Alpha, SPARC, and IA-64 now also using floating stacks.
2266 * Startup time of internationalized applications greatly improved through
2267 iconv cache. Use iconvconfig to generate the cache file.
2268 Contributed by Ulrich Drepper.
2270 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2271 severe performance problems. Patch by David Mosberger.
2273 * The Hurd port got a lot more functionality like AIO, various stdio
2274 extensions, etc. Mainly done by Roland McGrath.
2276 * mtrace can now lookup symbols in shared libraries.
2280 * Intel's IA-64 math library is largely integrated. It provides fast and
2281 accurate implementatations for most basic and standard math functions
2282 in float, double, and long double format.
2284 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2285 and asin for the 96-bit long double format and asin, log, tan for the
2286 128-bit long double format.
2288 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2289 The basic double functions exist today. Contributed by Abraham Ziv
2290 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2291 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2293 * An asynchronous name lookup library was added. The interface is designed
2294 after POSIX AIO. The proposal was circulated beforehand to get comments.
2295 No negative ones came in. Implemented by Ulrich Drepper.
2297 * Port to S390/64bit contributed by Martin Schwidefsky
2298 <schwidefsky@de.ibm.com>.
2300 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2301 of functions for Linux/IA-64.
2303 * The RPC code is now thread safe. Threads can now use the same service
2304 of different services at the same time. Patch by Eric Norum
2305 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2307 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2308 family of functions for Linux/S390.
2310 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2311 of functions for Linux/x86.
2313 * Port to Linux/CRIS contributed by Axis Communications.
2317 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2318 we can now check for namespace violations and missing declarations. The
2319 result is that almost all headers are now Unix-compliant (as defined in
2320 the upcoming XPG6). The negative side is that some programs might need
2321 corrections, too, if they depend on the incorrect form of the headers in
2322 previous versions which defined too many symbols and included too many
2325 * regex now handles multibyte character sets correctly.
2326 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2328 * iconv (the program) does now conform to the upcoming XPG6 and handles
2329 charmaps. Instead of the charset names the path of charmaps can be
2330 provided and the conversion happens based on this data.
2331 Contributed by Ulrich Drepper.
2333 * The locale program now provides detailed information about the installed
2338 only lists the names of the supported locales
2342 provides details such as country, language, and codeset name.
2343 Contributed by Ulrich Drepper.
2347 * The gencat program now parses the input file according to the charset
2348 selected by the LC_CTYPE category. This is important for stateful
2349 character sets. To make generating catalogs easier there is a way
2350 to overwrite the charset selected by the locale: before the first
2351 message or $ quote line the catalog can contain a line like
2353 $ codeset=ISO-8859-2
2355 to select the charset (ISO-8859-2 in this case).
2357 Implemented by Shinya Hanataka and Ulrich Drepper.
2359 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2360 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2361 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2363 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2364 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2366 * The LANGUAGE environment variable is now ignored unless the locale is
2367 changed from the default "C" locale.
2369 * The usual bug fixes.
2373 * Greg McGary added runtime support for bounds checking using gcc's
2374 new -fbounded-pointers option. ix86 target is complete. PowerPC
2377 * Thorsten Kukuk added secure mode support to nscd.
2379 * The Berkeley db libraries have been removed.
2381 Related, the nss_db module is now in a separate package since it
2382 obviously requires a database library being available.
2384 * Wide character I/O streams implemented by Ulrich Drepper.
2386 * Functions from the extended socket API added by Ulrich Drepper.
2388 * Functions feenableexcept and fedisableexcept to control the
2389 behaviour of individual exceptions have been added by Andreas Jaeger.
2391 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2393 * The resolver code has been updated from bind 8.2.3-T5B which supports
2394 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2397 This change could in some situations effect backward compatibility. Since
2398 now `_res' is a thread-local instead of a global variable, modifying it
2399 in one thread does not have any effect in other threads.
2401 The resolver library was also extended to allow IPv6 as the transport
2402 protocol for the requests. This work was done by Stig Venaas.
2404 * Compatibility code for K&R C compilers has been removed from the
2405 header files. A ISO C compiler is needed to use the library
2406 (conforming to either C89 or C99 standard).
2408 * Complete rewrite of the localedef program to support multibyte character
2409 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2410 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2411 Implemented by Ulrich Drepper.
2413 Bruno Haible significantly improved the generation and use of the data
2414 structures for the wide character tables.
2416 * Plural handling in gettext implemented by Ulrich Drepper.
2418 * The utmp daemon has been removed.
2420 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2422 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2425 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2427 * POSIX barriers implemented by Kaz Kylheku.
2429 * POSIX spawn function family implemented by Ulrich Drepper.
2431 * POSIX spinlocks are now available.
2433 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2435 * the configure option --enable-kernel=X.Y.Z allows to strip out
2436 compatibility for kernel versions before X.Y.Z. This is currently only
2437 implemented for Linux.
2439 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2440 field sin6_scope_id. This means that all programs using IPv6 should be
2441 recompiled. Don't expect binary compatibility with previous glibc
2444 * various conversion modules for IBM character sets contributed by
2447 * IA-64 port by Jes Sorensen and HJ Lu.
2461 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2463 * New xdr functions are added; some rpc functions are now 64bit clean.
2465 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2467 * Fixed known incompatibilities with glibc 2.0.
2469 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2471 * Optimized a number of functions (especially the ELF dynamic loader).
2473 * Update timezone data files.
2475 * lots of charmaps corrections
2477 * some new locale definitions and charmaps
2482 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2483 conform to POSIX member type requirements. Symbol versions have been
2484 adjusted as needed within the library, and for direct use by applications,
2485 but there is potential for problems if third-party libraries use
2486 struct timeval as part of their interface. This does not present
2487 a problem for X and other "essential" system libraries.
2489 * An additional locale model to support C++ Standard Library locale
2490 model and probably more was implemented by Ulrich Drepper.
2492 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2495 * Miles Bader provided the `argp' function family to support hierachical
2496 command line argument parsing, layered on top of getopt.
2498 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2500 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2503 * scanf recognizes the %a and %A format for scanning floating point numbers.
2505 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2506 information and interfaces for the available integer types.
2508 * about 130 new math functions were added to implement the ISO C9x math
2511 * the new header <complex.h> contains definitions of the complex math
2512 functions from ISO C 9X.
2514 * the new header <tgmath.h> defines generic macros to use complex or
2515 real valued functions.
2517 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2519 * Andreas Jaeger provided a test suite for the math library.
2521 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2523 * Ulrich Drepper added character set conversion functions (iconv).
2525 * Optimized string functions have been added.
2527 * The localedata addon is now part of glibc.
2529 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2531 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2532 daemon for NSS (nscd).
2534 Missing a better place here are some numbers on improvements. Under
2535 Linux 2.1.125 un-tar-ing the kernel sources takes
2539 using local files 12.19s 6.88s 22.91s
2541 using NIS 13.92s 8.91s 26.34s
2543 using NIS & nscd 10.37s 7.34s 25.30s
2545 using NIS+ 27.57s 30.37s 640.46s
2547 using NIS+ & nscd 10.25s 7.83s 26.51s
2549 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2551 Keep in mind that non-namelookup related operations dominate above times.
2552 It was just a common complain that using NIS+ unpacking the kernel is
2555 [1] The old nscd implementation is not available anymore since it was
2556 distributed with glibc up to version 2.0.98 and thus is now replaced.
2558 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2560 * Mark Kettenis provided a Hesiod NSS module.
2562 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2563 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2565 * rcmd can now handle netgroups (Dick Streefland).
2567 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2570 * Support for the IPv6 protocol has been added to the socket API, as per the
2571 latest draft standards.
2573 * Support for Linux 2.2 has been added.
2575 * Interface changes relative to the latest 2.0.x release:
2576 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2577 addseverity NEW: Unix98
2578 alphasort64 NEW: LFS
2579 argp_err_exit_status NEW: argp, GNU ext
2580 argp_error NEW: argp, GNU ext
2581 argp_failure NEW: argp, GNU ext
2582 argp_help NEW: argp, GNU ext
2583 argp_parse NEW: argp, GNU ext
2584 argp_program_bug_address NEW: argp, GNU ext
2585 argp_program_version NEW: argp, GNU ext
2586 argp_program_version_hook NEW: argp, GNU ext
2587 argp_state_help NEW: argp, GNU ext
2588 argp_usage NEW: argp, GNU ext
2589 authdes_create NEW: Secure RPC
2590 authdes_getucred NEW: Secure RPC
2591 authdes_pk_create NEW: Secure RPC
2592 backtrace NEW: GNU ext.
2593 backtrace_symbols NEW: GNU ext.
2594 backtrace_symbols_fd NEW: GNU ext.
2596 cacosf NEW: ISO C 9x
2597 cacosh NEW: ISO C 9x
2598 cacoshf NEW: ISO C 9x
2599 cacoshl NEW: ISO C 9x
2600 cacosl NEW: ISO C 9x
2607 casinf NEW: ISO C 9x
2608 casinh NEW: ISO C 9x
2609 casinhf NEW: ISO C 9x
2610 casinhl NEW: ISO C 9x
2611 casinl NEW: ISO C 9x
2613 catanf NEW: ISO C 9x
2614 catanh NEW: ISO C 9x
2615 catanhf NEW: ISO C 9x
2616 catanhl NEW: ISO C 9x
2617 catanl NEW: ISO C 9x
2618 cbc_crypt NEW: Secure RPC
2622 ccoshf NEW: ISO C 9x
2623 ccoshl NEW: ISO C 9x
2629 cimagf NEW: ISO C 9x
2630 cimagl NEW: ISO C 9x
2631 clearerr_locked REMOVED
2632 clntunix_create NEW: sunrpc ext
2634 clog10 NEW: ISO C 9x
2635 clog10f NEW: ISO C 9x
2636 clog10l NEW: ISO C 9x
2646 cprojf NEW: ISO C 9x
2647 cprojl NEW: ISO C 9x
2649 crealf NEW: ISO C 9x
2650 creall NEW: ISO C 9x
2655 csinhf NEW: ISO C 9x
2656 csinhl NEW: ISO C 9x
2659 csqrtf NEW: ISO C 9x
2660 csqrtl NEW: ISO C 9x
2664 ctanhf NEW: ISO C 9x
2665 ctanhl NEW: ISO C 9x
2667 des_setparity NEW: Secure RPC
2668 ecb_crypt NEW: Secure RPC
2669 endutxent NEW: Unix98
2671 exp10f NEW: ISO C 9x
2672 exp10l NEW: ISO C 9x
2676 fattach NEW: STREAMS
2677 fdetach NEW: STREAMS
2681 feclearexcept NEW: ISO C 9x
2682 fegetenv NEW: ISO C 9x
2683 fegetexceptflag NEW: ISO C 9x
2684 fegetround NEW: ISO C 9x
2685 feholdexcept NEW: ISO C 9x
2687 feraiseexcept NEW: ISO C 9x
2688 ferror_locked REMOVED
2689 fesetenv NEW: ISO C 9x
2690 fesetexceptflag NEW: ISO C 9x
2691 fesetround NEW: ISO C 9x
2692 fetestexcept NEW: ISO C 9x
2693 feupdateenv NEW: ISO C 9x
2694 fflush_locked REMOVED
2698 fgets_unlocked NEW: GNU ext.
2699 fileno_locked REMOVED
2711 fputc_locked REMOVED
2712 fputs_unlocked NEW: GNU ext.
2713 fread_unlocked NEW: GNU ext.
2718 fstatvfs NEW: Unix98
2722 ftruncate64 NEW: LFS
2724 fwrite_unlocked NEW: GNU ext.
2725 gai_strerror NEW: IPv6
2729 getchar_locked REMOVED
2731 getdate_err NEW: Unix98
2732 getdate_r NEW: GNU ext.
2734 getnameinfo NEW: IPv6
2735 getnetname NEW: Secure RPC
2736 getpmsg NEW: STREAMS
2737 getpt NEW: Unix98 PTY
2738 getrlimit64 NEW: LFS
2739 getutxent NEW: Unix98
2740 getutxid NEW: Unix98
2741 getutxline NEW: Unix98
2742 glob64 NEW: GNU ext.
2743 globfree64 NEW: GNU ext.
2744 gnu_get_libc_release NEW: GNU ext.
2745 gnu_get_libc_version NEW: GNU ext.
2746 grantpt NEW: Unix98 PTY
2747 host2netname NEW: Secure RPC
2749 iconv_close NEW: iconv
2750 iconv_open NEW: iconv
2751 if_freenameindex NEW: IPv6
2752 if_indextoname NEW: IPv6
2753 if_nameindex NEW: IPv6
2754 if_nametoindex NEW: IPv6
2755 in6addr_any NEW: IPv6
2756 in6addr_loopback NEW: IPv6
2757 inet6_isipv4mapped NEW: IPv6
2758 isastream NEW: STREAMS
2759 iswblank NEW: GNU ext.
2760 key_decryptsession NEW: Secure RPC
2761 key_decryptsession_pk NEW: Secure RPC
2762 key_encryptsession NEW: Secure RPC
2763 key_encryptsession_pk NEW: Secure RPC
2764 key_gendes NEW: Secure RPC
2765 key_get_conv NEW: Secure RPC
2766 key_secretkey_is_set NEW: Secure RPC
2767 key_setnet NEW: Secure RPC
2768 key_setsecret NEW: Secure RPC
2769 llrint NEW: ISO C 9x
2770 llrintf NEW: ISO C 9x
2771 llrintl NEW: ISO C 9x
2772 llround NEW: ISO C 9x
2773 llroundf NEW: ISO C 9x
2774 llroundl NEW: ISO C 9x
2779 lrintf NEW: ISO C 9x
2780 lrintl NEW: ISO C 9x
2781 lround NEW: ISO C 9x
2782 lroundf NEW: ISO C 9x
2783 lroundl NEW: ISO C 9x
2785 makecontext NEW: Unix98
2786 mempcpy NEW: GNU ext.
2789 modify_ldt NEW: kernel
2793 nearbyint NEW: ISO C 9x
2794 nearbyintf NEW: ISO C 9x
2795 nearbyintl NEW: ISO C 9x
2796 netname2host NEW: Secure RPC
2797 netname2user NEW: Secure RPC
2798 nexttoward NEW: ISO C 9x
2799 nexttowardf NEW: ISO C 9x
2800 nexttowardl NEW: ISO C 9x
2804 passwd2des NEW: Secure RPC
2806 pow10f NEW: GNU ext.
2807 pow10l NEW: GNU ext.
2810 printf_size NEW: GNU ext.
2811 printf_size_info NEW: GNU ext.
2812 profil_counter REMOVED
2813 pthread_mutexattr_getkind_np REPLACED
2814 pthread_mutexattr_setkind_np REPLACED
2815 ptsname NEW: Unix98 PTY
2816 ptsname_r NEW: Unix98 PTY
2818 putchar_locked REMOVED
2819 putgrent NEW: GNU ext.
2821 putpmsg NEW: STREAMS
2822 pututxline NEW: Unix98
2826 readdir64_r NEW: LFS
2827 remquo NEW: ISO C 9x
2828 remquof NEW: ISO C 9x
2829 remquol NEW: ISO C 9x
2831 roundf NEW: ISO C 9x
2832 roundl NEW: ISO C 9x
2834 scalbln NEW: ISO C 9x
2835 scalblnf NEW: ISO C 9x
2836 scalblnl NEW: ISO C 9x
2838 sendfile NEW: kernel
2839 setcontext NEW: Unix98
2840 setrlimit64 NEW: LFS
2841 setutxent NEW: Unix98
2843 sigignore NEW: Unix98
2844 sigqueue NEW: POSIX.1b
2845 sigrelse NEW: Unix98
2846 sigset NEW: POSIX.1b
2847 sigtimedwait NEW: POSIX.1b
2848 sigwaitinfo NEW: POSIX.1b
2849 sincos NEW: GNU ext.
2850 sincosf NEW: GNU ext.
2851 sincosl NEW: GNU ext.
2855 strcasestr NEW: GNU ext.
2856 strtoimax NEW: ISO C 9x
2857 strtoumax NEW: ISO C 9x
2858 strverscmp NEW: GNU ext.
2859 svcauthdes_stats NEW: Secure RPC
2860 svcunix_create NEW: sunrpc etx
2861 svcunixfd_create NEW: sunrpc ext
2862 swapcontext NEW: Unix98
2863 tcgetsid NEW: Unix98 PTY
2864 tdestroy NEW: GNU ext.
2865 tgamma NEW: ISO C 9x
2866 tgammaf NEW: ISO C 9x
2867 tgammal NEW: ISO C 9x
2871 truncf NEW: ISO C 9x
2872 truncl NEW: ISO C 9x
2874 unlockpt NEW: Unix98 PTY
2875 updwtmpx NEW: Unix98
2876 user2netname NEW: Secure RPC
2877 utmpxname NEW: Unix98
2878 versionsort NEW: GNU ext.
2879 versionsort64 NEW: GNU ext.
2881 wcscasecmp NEW: GNU ext.
2882 wcsncasecmp NEW: GNU ext.
2883 wcsnlen NEW: GNU ext.
2884 wcstoimax NEW: ISO C 9x
2885 wcstoll NEW: ISO C 9x
2886 wcstoull NEW: ISO C 9x
2887 wcstoumax NEW: ISO C 9x
2889 wordexp NEW: POSIX.2
2890 wordfree NEW: POSIX.2
2891 write_profiling REMOVED
2892 xdecrypt NEW: Secure RPC
2893 xdr_authdes_cred NEW: Secure RPC
2894 xdr_authdes_verf NEW: Secure RPC
2895 xdr_cryptkeyarg NEW: Secure RPC
2896 xdr_cryptkeyarg2 NEW: Secure RPC
2897 xdr_cryptkeyres NEW: Secure RPC
2898 xdr_getcredres NEW: Secure RPC
2899 xdr_key_netstarg NEW: Secure RPC
2900 xdr_key_netstres NEW: Secure RPC
2901 xdr_keybuf NEW: Secure RPC
2902 xdr_keystatus NEW: Secure RPC
2903 xdr_netnamestr NEW: Secure RPC
2904 xdr_sizeof NEW: Secure RPC
2905 xdr_unixcred NEW: sunrpc ext
2906 xencrypt NEW: Secure RPC
2907 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2918 * inet_ntoa is thread-safe
2920 * updwtmp is moved from libutil to libc
2922 * rewrite of cbrt function
2924 * update of timezone data
2938 * add atoll function
2940 * fix complex problems in Berkeley DB code
2942 * fix math functions
2946 * fixed lots of header problems (especially Linux/GNU specific)
2948 * dynamic loader preserves all registers
2950 * Roland McGrath provided support for handling of auxiliary objects in
2951 the ELF dynamic loader.
2953 * support for parallel builds is improved
2957 * GNU extensions are no longer declared by default. To enable them you
2958 must define the macro `_GNU_SOURCE' in your program or compile with
2961 * The library has changed from using GNU ld symbol aliases to using weak
2962 symbols where available. The ELF object file format supports weak
2963 symbols; GNU ld also supports weak symbols in the a.out format. (There
2964 is also now support for other GNU ld extensions in ELF. Use the
2965 `--with-elf' option to configure to indicate you have ELF, and
2966 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2967 of many files which contained only symbol aliases, reducing the size of
2968 the source and the compiled library; many other files were renamed to
2969 less cryptic names previously occupied by the symbol alias files.
2970 There is a new header file <elf.h> for programs which operate on
2971 files in the ELF format.
2973 * Converted to Autoconf version 2, so `configure' has more options.
2974 Run `configure --help' to see the details.
2976 * The library can now be configured to build profiling, highly-optimized
2977 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2978 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2979 `configure' enable building these extra libraries. The shared library is
2980 built by default when using both ELF and GNU ld. When shared libraries
2981 are enabled, the new library `-ldl' is available for arbitrary run-time
2982 loading of shared objects; its interface is defined in <dlfcn.h>. The
2983 new header file <link.h> gives access to the internals of the run-time
2984 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2985 application of same name on other systems and it provides information
2986 about dynamically linked binaries.
2988 * The C library now provides the run-time support code for profiling
2989 executables compiled with `-pg'. Programs can control the profiling code
2990 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2991 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2992 the support for this file format was contributed by David Mosberger-Tang.
2994 * The math code has been replaced with a math library based on fdlibm from
2995 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2996 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2997 functions. The math functions now reside in a separate library, so
2998 programs using them will need to use `-lm' their linking commands.
3000 * John C. Bowman contributed optimized ix87 assembler inline functions.
3002 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3003 mechanism similar to that found in Solaris 2. This is now used for the
3004 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3005 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3006 file controls what services are used for each individual database. This
3007 works by loading shared libraries with names specified in `nsswitch.conf',
3008 so service modules can be changed or added at any time without even
3009 relinking any program. Currently there are the file, db, and NIS based
3010 NSS services available.
3012 * The new functions `strtoq' and `strtouq' parse integer values from
3013 strings, like `strtol' and `strtoul', but they return `long long int' and
3014 `unsigned long long int' values, respectively (64-bit quantities).
3016 * The new functions `strtof' and `strtold' parse floating-point values from
3017 strings, like `strtod', but they return `float' and `long double' values,
3018 respectively (on some machines `double' and `long double' are the same).
3020 * Ulrich Drepper has contributed new implementations of the floating-point
3021 printing and reading code used in the `printf' family of functions and
3022 `strtod', `strtof', and `strtold'. These new functions are perfectly
3023 accurate, and much faster than the old ones.
3025 * The implementation of the POSIX locale model was completely rewritten by
3026 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3027 to compile the POSIX locale definition.
3029 * The former dummy implementations of the strcoll and strxfrm function are
3030 now replaced by fully functional code contributed by Ulrich Drepper. The
3031 collation information comes from the POSIX locale definitions.
3033 * The new header <langinfo.h> defines an interface for accessing
3034 various locale-dependent data (using the locale chosen with `setlocale').
3036 * Ulrich Drepper has contributed a new suite of functions for operation on
3037 wide-character and multibyte-character strings, in <wchar.h>;
3038 and classification and case conversion of wide characters, in <wctype.h>.
3039 These new functions are conforming to the ISO C, Amendement 1 specification.
3041 * There is now a second implementation of the standard I/O library available.
3042 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3043 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3045 * You can now use positional parameter specifications in format strings
3046 for the `printf' and `scanf' families of functions. For example,
3047 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3048 ``Number 6, Mr Jones''. This is mainly useful when providing different
3049 format strings for different languages, whose grammars may dictate
3050 different orderings of the values being printed. To support this
3051 feature, the interface for `register_printf_handler' has changed; see
3052 the header file <printf.h> for details.
3054 * The `printf' and `scanf' families of functions now understand a new
3055 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3056 to group numbers as indicated by the locale; for `scanf' and friends, this
3057 says to accept as valid only a number with all the proper grouping
3058 separators in the right places. In the default "C" locale, numbers are
3059 not grouped; but locales for specific countries will define the usual
3060 conventions (i.e. separate thousands with `,' in the US locale).
3062 * The pgrp functions have been regularized, slightly incompatibly but much
3063 less confusingly. The core functions are now `getpgid' and `setpgid',
3064 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3065 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3066 provided for compatibility. There is no longer an incompatible `getpgrp'
3067 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3069 * The new header file <fts.h> and suite of functions simplify programs that
3070 operate on directory trees. This code comes from 4.4 BSD.
3072 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3073 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3074 NSS scheme used in glibc.
3076 * There is a new malloc debugging hook `__memalign_hook'.
3078 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3079 `unsigned int' in <sys/types.h>. These are for compatibility only and
3080 their use is discouraged.
3082 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3083 done differently, so that it works even without GNU ld.
3085 * New function `euidaccess' checks allowed access to a file like `access',
3086 but using the effective IDs instead of the real IDs.
3088 * The time zone data files have been updated for the latest and greatest
3089 local time conventions of the countries of the world.
3091 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3094 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3095 for formatting floating-point numbers. They are provided only for
3096 compatibility; new programs should use `sprintf' instead. There are
3097 also equivalent function for the `long double' floating-point type and
3098 all functions also exist in a reentrant form.
3100 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3101 functions for maintaining the login-record files (primarily of use to
3102 system programs such as `login'), and convenient functions for
3103 allocating and initializing a pseudo-terminal (pty) device.
3105 * Ulrich Drepper has contributed new support for System V style
3106 shared memory and IPC on systems that support it.
3108 * Ulrich Drepper has contributed several miscellaneous new functions found
3109 in System V: The `hsearch' family of functions provide an effective
3110 implementation of hash tables; `a64l' and `l64a' provide a very simple
3111 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3114 * Ulrich Drepper has contributed new reentrant counterparts for the
3115 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3117 * Ulrich Drepper has contributed new, highly-optimized versions of several
3118 string functions for the i486/Pentium family of processors.
3120 * Ulrich Drepper has updated the Linux-specific code, based largely
3121 on work done in Hongjiu Lu's version of GNU libc for Linux.
3122 The GNU library now supports Linux versions 2.0.10 and later,
3123 using the ELF object file format (i[3456]86-*-linux).
3125 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3127 * David Mosberger-Tang and Richard Henderson have ported the C library
3128 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3129 dynamic linking support for ELF/Alpha.
3131 * Richard Henderson contributed several Alpha optimized assembler function
3132 for arithmetic and string handling.
3134 * Ulrich Drepper has contributed a new set of message catalog functions to
3135 support multiple languages using the <libintl.h> interface, for use with
3136 his new package GNU gettext. Translation volunteers have contributed
3137 catalogs of the library's messages in Spanish, German, and Korean.
3139 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3140 program and the `catgets' function for reading the catalog files it
3141 creates. (The <libintl.h> interface is preferred; we include the
3142 <nl_types.h> interface using `catgets' only for source compatibility with
3143 programs already written to use it.)
3145 * New header file <values.h> gives SVID-compatible names for <limits.h>
3148 * Various new macros, declarations, and small header files for compatibility
3151 * New function `group_member' is a convenient way to check if a process has
3152 a given effective group ID.
3154 * When using GCC 2.7 and later, the socket functions are now declared in a
3155 special way so that passing an argument of type `struct sockaddr_in *',
3156 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3157 `struct sockaddr *' type, does not generate a type-clash warning.
3159 * New function `error' declared in header file <error.h> is a convenient
3160 function for printing error messages and optionally exiting; this is the
3161 canonical function used in GNU programs. The new functions `err', `warn',
3162 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3163 doing the same thing.
3165 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3166 POSIX.2 `glob' function to do ~ and {...} expansion.
3168 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3169 `clearenv' which is used in POSIX.9 is also available.
3171 * New function `getsid' returns session ID number on systems that support it.
3173 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3174 files <db.h> and <mpool.h> provide a rich set of functions for several
3175 types of simple databases stored in memory and in files, and <ndbm.h> is
3176 an old `ndbm'-compatible interface using the `db' functions. Link with
3177 `-ldb' to get these functions.
3179 * New macro `strdupa' copies a string like `strdup', but uses local stack
3180 space from `alloca' instead of dynamic heap space from `malloc'.
3182 * New function `strnlen' is like `strlen' but searches only a given maximum
3183 number of characters for the null terminator. `stpncpy', `strndup' and
3184 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3187 * New function `statfs' in header <sys/statfs.h>.
3189 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3190 provide convenient functions for operating on blocks of null-terminated
3193 * A new suite of functions in <utmp.h> handle all the details of reading
3194 and writing the utmp file.
3196 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3199 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3200 completely POSIX compliant and also implemented the extended functionality
3201 to handle alternate digit representation and alternate era date formats.
3203 * Ulrich Drepper provided an implementation of the `strptime' function
3204 defined in XPG4.2 which transforms a string into a `struct tm' value.
3206 * Paul Eggert provided the tzselect shell script as part of the timezone
3207 code. The shell script makes it easy to select the correct timezone
3210 * The implementation of the malloc family of functions is completely replaced
3211 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3212 The implementation uses the mmap function (if available) and it is
3213 optimized for the use in multi threaded programs.
3215 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3216 functions. This new functionality is usable by specifying a special
3217 salt string and it is compatible with implementation on *BSD systems.
3219 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3220 `getsubopt' to handle second level command line options, `bsd_signal'
3221 to access BSD style `signal' functionality, the obsolete `regexp' style
3224 * the `lchown' function is available on system which support this
3227 * The implementation of the shadow password handling function was contributed
3230 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3232 * POSIX.1g support was added. The <sys/select.h> header is available,
3233 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3234 implementation of `getaddrinfo'.
3238 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3240 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3241 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3243 * The new function `daemon' from 4.4 BSD is useful for server programs that
3244 want to put themselves in the background.
3246 * Joel Sherrill has contributed support for several standalone boards that
3247 run without an operating system.
3249 * `printf', `scanf' and friends now accept a `q' type modifier for long
3250 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3252 * All of the code taken from BSD (notably most of the math and networking
3253 routines) has been updated from the BSD 4.4-Lite release.
3255 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3257 * The new functions `getdomainname' and `setdomainname' fetch or change the
3258 YP/NIS domain name. These are system calls which exist on systems which
3261 * The time zone data files have been updated for the latest international
3264 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3265 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3269 * The C library now includes support for Sun RPC, from Sun's free
3270 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3271 are included. (There is still no support for YP.)
3273 * Tom Quinn has contributed a port of the C library to SGI machines running
3274 Irix 4 (mips-sgi-irix4).
3276 * The new `lockf' function is a simplified interface to the locking
3277 facilities of `fcntl', included for compatibility.
3279 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3281 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3283 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3286 * The error message printed by `assert' for a failed assertion now includes
3287 the name of the program (if using GNU ld) and the name of the calling
3288 function (with versions of GCC that support this).
3290 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3292 * The library now includes the <sys/mman.h> header file and memory
3293 management functions `mmap', `munmap', `mprotect', `msync', and
3294 `madvise', on systems that support those facilities.
3296 * The interface for `mcheck' has changed slightly: the function called to
3297 abort the program when an allocation inconsistency is detected now takes
3298 an argument that indicates the type of failure. The new function
3299 `mprobe' lets you request a consistency check for a particular block at
3300 any time (checks are normally done only when you call `free' or `realloc'
3303 * It is now possible to easily cross-compile the C library, building on one
3304 system a library to run on another machine and/or operating system. All
3305 you need to do is set the variable `HOST_CC' in `configparms' to the
3306 native compiler for programs to run on the machine you are building on (a
3307 few generator programs are used on Unix systems); set `CC' to the
3310 * The new function `fexecve' (only implemented on the GNU system) executes
3311 a program file given a file descriptor already open on the file.
3315 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3316 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3318 * You can set the variable `libprefix' in `configparms' to specify a prefix
3319 to be prepended to installed library files; this makes it easy to install
3320 the GNU C library to be linked as `-lgnuc' or whatever.
3322 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3323 copies a limited number of characters from a string, and returns the
3324 address of the last character written.
3326 * You no longer need to check for whether the installed `stddef.h' is
3327 compatible with the GNU C library. configure now checks for you.
3329 * You can now define a per-stream `fileno' function to convert the
3330 stream's cookie into an integral file descriptor.
3332 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3333 allocates zero bytes of storage, and returns a unique pointer which
3334 you can pass to `realloc' or `free'. The behavior is undefined if
3335 you dereference this pointer.
3337 * The C library now runs on Sony NEWS m68k machines running either
3338 NewsOS 3 or NewsOS 4.
3340 * The new `syscall' function is a system-dependent primitive function
3341 for invoking system calls. It has the canonical behavior on Unix
3342 systems, including unreliable return values for some calls (such as
3343 `pipe', `fork' and `getppid').
3345 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3346 to `EAGAIN', which is the preferred name. On systems whose kernels
3347 use two distinct codes, the C library now translates EWOULDBLOCK to
3348 EAGAIN in every system call function.
3352 * The GNU C Library Reference Manual is now distributed with the library.
3353 `make dvi' will produce a DVI file of the printed manual.
3354 `make info' will produce Info files that you can read on line using C-h i
3355 in Emacs or the `info' program.
3356 Please send comments on the manual to bug-glibc-manual@gnu.org.
3358 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3360 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3362 * Jason Merrill has contributed a port to the Sequent Symmetry running
3363 Dynix version 3 (i386-sequent-dynix).
3365 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3366 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3368 * New function `memory_warnings' lets you arrange to get warnings when
3369 malloc is running out of memory to allocate, like Emacs gives you.
3371 * The C library now contains the relocating allocator used in Emacs 19 for
3372 its editing buffers. This allocator (ralloc) minimizes allocation
3373 overhead and fragmentation by moving allocated regions around whenever it
3374 needs to. You always refer to a ralloc'd region with a "handle" (a
3375 pointer to a pointer--an object of type `void **').
3377 * There is a new `printf' format: `%m' gives you the string corresponding
3378 to the error code in `errno'.
3380 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3381 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3382 pass, the `a' modifier says to fill in a `char **' you pass with a
3385 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3386 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3387 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3389 * `mkstemp' is a traditional Unix function to atomically create and open a
3390 uniquely-named temporary file.
3394 * The standard location for the file that says what the local timezone is
3395 has changed again. It is now `/usr/local/etc/localtime' (or more
3396 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3398 * The distribution no longer contains any files with names longer than 14
3401 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3402 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3404 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3408 * The configuration process has changed quite a bit. The `configure'
3409 script is now used just like the configuration scripts for other GNU
3410 packages. The `sysdeps' directory hierarchy is much rearranged.
3411 The file `INSTALL' explains the new scheme in detail.
3413 * The header files no longer need to be processed into ANSI C and
3414 traditional C versions. There is just one set of files to install, and
3415 it will work with ANSI or old C compilers (including `gcc -traditional').
3417 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3418 MIPS DECStation running Ultrix 4.
3420 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3421 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3422 made itself into a shared library.
3424 * Yet further improved support for the i386, running 4.3 BSD-like systems
3425 (such as Mach 3 with the Unix single-server), or System V.
3427 * New function `strncasecmp' to do case-insensitive string comparison
3428 with limited length.
3430 * New function `strsep' is a reentrant alternative to `strtok'.
3432 * New functions `scandir' and `alphasort' for searching directories.
3434 * New function `setenv' is a better interface to `putenv'.
3436 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3437 function for traversing a directory tree.
3439 * The GNU obstack package is now also part of the C library.
3440 The new function `open_obstack_stream' creates a stdio stream that
3441 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3442 formatted output directly to an obstack.
3444 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3445 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3447 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3449 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3450 things to your strings.
3452 * There are some new test programs: test-fseek, testmb, and testrand.
3454 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3455 These ports are not finished, but are a good starting place for really
3456 supporting those systems.
3458 * `/etc/localtime' is now the standard location for the file that says what
3459 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3460 This follows the general principle that `/etc' is the place for all local
3461 configuration files.
3463 * The C library header files now use `extern "C"' when used by the C++
3464 compiler, so the C library should now work with C++ code.
3466 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3467 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3470 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3471 function which uses the `merge sort' algorithm, and is said to be
3472 significantly faster than the old GNU `qsort' function. Merge sort is
3473 now the standard `qsort' function. The new algorithm can require a lot
3474 of temporary storage; so, the old sorting function is called when the
3475 required storage is not available.
3477 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3478 provides the Unix `crypt' function, plus some other entry points.
3480 * The code and header files taken from 4.4 BSD have been updated with the
3481 latest files released from Berkeley.
3483 ----------------------------------------------------------------------
3484 Copyright information:
3486 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3488 Permission is granted to anyone to make or distribute verbatim copies
3489 of this document as received, in any medium, provided that the
3490 copyright notice and this permission notice are preserved,
3491 thus giving the recipient permission to redistribute in turn.
3493 Permission is granted to distribute modified versions
3494 of this document, or of portions of it,
3495 under the above conditions, provided also that they
3496 carry prominent notices stating who last changed them.
3499 version-control: never