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 - Signaling NaN macros: SNANF, SNAN, SNANL.
56 - Comparison macros: iseqsig.
58 - Classification macros: iscanonical, issubnormal, iszero.
60 - Total order functions: totalorder, totalorderf, totalorderl,
61 totalordermag, totalordermagf, totalordermagl.
63 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
65 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
66 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
68 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
69 are added to libc. They convert a floating-point number into string.
71 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
72 to float instead of double. This does not affect the ABI of any libraries
73 that are part of the GNU C Library, but may affect the ABI of other
74 libraries that use this type in their interfaces.
76 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
77 float_t and double_t types are now defined to long double instead of float
78 and double. These options are not the default, and this does not affect
79 the ABI of any libraries that are part of the GNU C Library, but it may
80 affect the ABI of other libraries that use this type in their interfaces,
81 if they are compiled or used with those options.
83 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
84 for the Linux quota interface which predates kernel version 2.4.22 has
87 * The malloc_get_state and malloc_set_state functions have been removed.
88 Already-existing binaries that dynamically link to these functions will
89 get a hidden implementation in which malloc_get_state is a stub. As far
90 as we know, these functions are used only by GNU Emacs and this change
91 will not adversely affect already-built Emacs executables. Any undumped
92 Emacs executables, which normally exist only during an Emacs build, should
93 be rebuilt by re-running “./configure; make” in the Emacs build tree.
95 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
96 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
97 “no-ip6-dotint” had already been the default, and support for the
98 “ip6-dotint” option was removed from the Internet in 2006.
100 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
101 flag from <resolv.h> have been removed. The option relied on a
102 backwards-incompatible DNS extension which was never deployed on the
105 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
106 in the <resolv.h> header file have been deprecated. They were already
109 * DNSSEC-related declarations and definitions have been removed from the
110 <arpa/nameser.h> header file, and libresolv will no longer attempt to
111 decode the data part of DNSSEC record types. Previous versions of glibc
112 only implemented minimal support for the previous version of DNSSEC, which
113 is incompatible with the currently deployed version.
115 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
116 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
117 <arpa/nameser.h> header file because the distinction between RR types and
118 meta-RR types is not officially standardized, subject to revision, and
119 thus not suitable for encoding in a macro.
121 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
122 and rhook members of the res_state type in <resolv.h> have been removed.
123 The glibc stub resolver did not support these hooks, but the header file
124 did not reflect that.
126 * For multi-arch support it is recommended to use a GCC which has
127 been built with support for GNU indirect functions. This ensures
128 that correct debugging information is generated for functions
129 selected by IFUNC resolvers. This support can either be enabled by
130 configuring GCC with '--enable-gnu-indirect-function', or by
131 enabling it by default by setting 'default_gnu_indirect_function'
132 variable for a particular architecture in the GCC source file
135 Security related changes:
137 On ARM EABI (32-bit), generating a backtrace for execution contexts which
138 have been created with makecontext could fail to terminate due to a
139 missing .cantunwind annotation. This has been observed to lead to a hang
140 (denial of service) in some Go applications compiled with gccgo. Reported
141 by Andreas Schwab. (CVE-2016-6323)
143 The following bugs are resolved with this release:
145 [The release manager will add the list generated by
146 scripts/list-fixed-bugs.py just before the release.]
150 * The minimum Linux kernel version that this version of the GNU C Library
151 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
152 kernel version 2.6.32 or later suffices (on architectures that already
153 required kernel versions more recent than 3.2, those requirements remain
154 unchanged). Linux 3.2 or later kernel headers are required on all
157 * The pap_AN locale has been deleted. This has been deprecated for a long
158 time. It has been replaced by pap_AW & pap_CW, both of which have long
159 been included in previous releases.
161 * The readdir_r and readdir64_r functions have been deprecated. It is
162 recommended to use readdir and readdir64 instead.
164 * The type “union wait” has been removed. It was deprecated in the early
165 1990s and never part of POSIX. Application code should use the int type
166 instead of “union wait”.
168 * A new NSS action is added to facilitate large distributed system
169 administration. The action, MERGE, allows remote user stores like LDAP
170 to be merged into local user stores like /etc/groups in order to provide
171 easy to use, updated, and managed sets of merged credentials. The new
172 action can be used by configuring it in /etc/nsswitch.conf:
173 group: files [SUCCESS=merge] nis
174 Implemented by Stephen Gallagher (Red Hat).
176 * The deprecated __malloc_initialize_hook variable has been removed from the
179 * The long unused localedef --old-style option has been removed. It hasn't
180 done anything in over 16 years. Scripts using this option can safely
183 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
184 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
185 return the next representable value in the direction of positive infinity
186 and the nextdown functions return the next representable value in the
187 direction of negative infinity. These are currently enabled as GNU
190 Security related changes:
192 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
193 could result in a stack overflow when getnetbyname was called with an
194 overly long name. (CVE-2016-3075)
196 * Previously, getaddrinfo copied large amounts of address data to the stack,
197 even after the fix for CVE-2013-4458 has been applied, potentially
198 resulting in a stack overflow. getaddrinfo now uses a heap allocation
199 instead. Reported by Michael Petlan. (CVE-2016-3706)
201 * The glob function suffered from a stack-based buffer overflow when it was
202 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
203 Reported by Alexander Cherepanov. (CVE-2016-1234)
205 * The Sun RPC UDP client could exhaust all available stack space when
206 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
207 alloca plugin for GCC. (CVE-2016-4429)
209 * The IPv6 name server management code in libresolv could result in a memory
210 leak for each thread which is created, performs a failing naming lookup,
211 and exits. Over time, this could result in a denial of service due to
212 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
214 The following bugs are resolved with this release:
216 [1170] localedata: ne_NP: update Nepali locale definition file
217 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
219 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
220 [6796] math: fdim() does not set errno on overflow
221 [10354] libc: posix_spawn should use vfork() in more cases than presently
222 [11213] localedata: localedata: add copyright disclaimer to locale files
223 [12143] localedata: chr_US: new Cherokee locale
224 [12450] localedata: sgs_LT: new locale
225 [12676] localedata: ln_CD: new locale
226 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
228 [13304] math: fma, fmaf, fmal produce wrong results
229 [14259] build: --localedir arg to configure is ignored
230 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
231 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
232 [14934] localedata: es_CL: wrong first weekday chilean locale
233 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
235 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
237 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
238 [15368] nptl: raise() is not async-signal-safe
239 [15479] math: ceil, floor, round and trunc raise inexact exception
240 [15578] localedata: kk_KZ: various updates
241 [16003] localedata: pap_AN: punt old locale
242 [16137] localedata: iw_IL: punt old locale
243 [16190] localedata: eo: new esperanto locale
244 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
245 [16742] malloc: race condition: pthread_atfork() called before first
246 malloc() results in unexpected locking behaviour/deadlocks
247 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
249 [16983] localedata: postal_fmt does not allow %l and %n modifiers
250 [17565] localedata: pt_PT: wrong (work-)week start
251 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
252 [17950] build: Build fails with -msse
253 [18205] localedata: be_BY*: wrong first_weekday and first_workday
254 [18433] libc: posix_spawn does not return correctly upon failure to
256 [18453] localedata: charmaps/IBM875: incorrect codes
257 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
259 [18896] localedata: he_IL: improvements for currency
260 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
262 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
264 [19056] libc: Deprecate readdir_r
265 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
267 [19198] localedata: nl_NL: small improvements for Dutch locales
268 [19257] network: Per-thread memory leak in __res_vinit with IPv6
269 nameservers (CVE-2016-5417)
270 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
272 [19400] locale: Language missing in "iso-639.def", trivial fix in
274 [19431] malloc: Deadlock between fflush, getdelim, and fork
275 [19505] libc: Incorrect file descriptor validity checks in
276 posix_spawn_file_actions_add{open,close,dup2}
277 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
279 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
280 `intl/{gettextP,loadinfo}.h'
281 [19534] libc: execle, execlp may use malloc
282 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
283 [19573] network: res_nclose and __res_maybe_init disagree about name
284 server initialization, breaking Hesiod
285 [19575] localedata: Status of GB18030 tables
286 [19581] localedata: sr_* date_fmt string contains additional newline
287 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
289 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
290 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
291 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
292 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
294 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
296 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
298 [19610] dynamic-link: ldconfig -X removes stale symbolic links
299 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
300 [19633] locale: strfmon_l applies global locale to number formatting
301 [19642] network: Memory leak in getnameinfo
302 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
303 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
305 [19654] math: [x86_64] Need testcase for BZ #19590 fix
306 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
308 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
309 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
311 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
313 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
315 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
316 pointers and lengths in error-case.
317 [19727] locale: Converting from/to UTF-xx with iconv() does not always
318 report errors on UTF-16 surrogates values.
319 [19755] nscd: nscd assertion failure in gc
320 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
321 [19759] libc: mempcpy shouldn't be inlined
322 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
323 [19765] libc: s390 needs an optimized mempcpy
324 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
325 NAME_MAX limit assumption (CVE-2016-1234)
326 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
327 [19787] network: Missing and incorrect truncation checks in getnameinfo
328 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
330 [19791] network: Assertion failure in res_query.c with un-connectable name
332 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
333 [19822] math: libm.so install clobbers old version
334 [19825] network: resolv: send_vc can return uninitialized data in second
335 response to getaddrinfo
336 [19830] network: nss_dns: should check RDATA length against buffer length
337 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
338 confronted with A/AAAA records of invalid size
339 [19837] nss: nss_db: No retries for some long lines with a larger buffer
340 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
341 [19853] stdio: Printing IBM long double in decimal with high precision is
343 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
344 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
345 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
347 [19865] network: Assertion failure or memory leak in
348 _nss_dns_getcanonname_r
349 [19868] network: nss_dns: netent code does not skip over non-PTR records
350 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
352 [19881] string: Improve x86-64 memset
353 [19907] string: Incorrect memcpy tests
354 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
356 [19925] libc: termios.h XCASE namespace
357 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
358 [19929] libc: limits.h NL_NMAX namespace
359 [19931] stdio: Memory leak in vfprintf
360 [19957] libc: clone(CLONE_VM) access invalid parent memory
361 [19963] localedata: en_IL: New locale
362 [19989] stdio: stdio.h cuserid namespace
363 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
365 [19996] locale: langinfo.h nl_langinfo_l namespace
366 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
367 [20010] network: getaddrinfo: Stack overflow in hostent translation
369 [20012] stdio: libio: fmemopen append mode failure
370 [20014] stdio: stdio.h namespace for pre-threads POSIX
371 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
372 [20023] libc: fcntl.h timespec namespace
373 [20024] math: [x86_64] vectorized sincos trashes the stack
374 [20031] network: nss_hesiod: Heap overflow in get_txt_records
375 [20041] time: sys/time.h timespec namespace
376 [20043] libc: unistd.h missing cuserid for UNIX98 and before
377 [20044] libc: unistd.h missing pthread_atfork for UNIX98
378 [20051] libc: ttyslot in wrong header under wrong conditions
379 [20054] libc: gethostname not declared for XPG4
380 [20055] libc: termios.h missing tcgetsid for XPG4
381 [20072] dynamic-link: x86 init_cpu_features is called twice in static
383 [20073] libc: sys/stat.h fchmod namespace
384 [20074] libc: stdlib.h rand_r namespace
385 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
386 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
388 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
389 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
391 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
392 [20119] libc: Wrong mask for processors level type from CPUID
393 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
394 AS not supporting AVX512
395 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
397 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
398 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
400 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
401 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
402 [20178] libc: posix_spawn{p} should not call exit
403 [20191] stdio: libio: vtables hardening
404 [20195] string: FMA4 detection requires CPUID execution with register
406 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
407 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
409 [20212] math: acos (sNaN) returns sNaN
410 [20213] math: asin (sNaN) returns sNaN
411 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
412 [20218] math: [i386] asinhl (sNaN) returns sNaN
413 [20219] math: [i386] atanhl (sNaN) returns sNaN
414 [20222] stdio: fopencookie: Mangle function pointers
415 [20224] math: [i386] cbrtl (sNaN) returns sNaN
416 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
417 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
419 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
420 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
421 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
422 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
423 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
424 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
425 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
426 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
427 [20240] math: modf (sNaN) returns sNaN
428 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
429 [20250] math: frexp (sNaN) returns sNaN
430 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
431 [20255] math: [i386] fdim, fdimf return with excess range and precision /
433 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
434 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
435 subscript is below array bounds [-Werror=array-bounds]
436 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
437 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
439 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
440 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
442 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
444 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
445 [20316] localedata: id_ID: Februari instead of Pebruari
446 [20327] string: POWER8 strcasecmp returns incorrect result
447 [20347] math: Failure: Test: j0_downward (0xap+0)
448 [20348] libc: FAIL: misc/tst-preadvwritev64
449 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
450 [20350] libc: There is no test for p{read,write}64
451 [20357] math: Incorrect cos result for 1.5174239687223976
452 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
456 * Unicode 8.0.0 Support: Character encoding, character type info, and
457 transliteration tables are all updated to Unicode 8.0.0, using new
458 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
459 These updates cause user visible changes, such as the fixes for bugs
460 89, 16061, and 18568.
462 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
463 kernel-internal CPU set size. This means that requests that change the
464 CPU affinity which failed before (for example, an all-ones CPU mask) will
465 now succeed. Applications that need to determine the effective CPU
466 affinities need to call sched_getaffinity or pthread_getaffinity_np after
467 setting it because the kernel can adjust it (and the previous size check
468 would not detect this in the majority of cases).
470 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
471 the following new symbols are used: fts64_children, fts64_close,
472 fts64_open, fts64_read and fts64_set.
474 * getaddrinfo now detects certain invalid responses on an internal netlink
475 socket. If such responses are received, an affected process will
476 terminate with an error message of "Unexpected error <number> on netlink
477 descriptor <number>" or "Unexpected netlink response of size <number> on
478 descriptor <number>". The most likely cause for these errors is a
479 multi-threaded application which erroneously closes and reuses the netlink
480 file descriptor while it is used by getaddrinfo.
482 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
483 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
484 unnecessary serialization of memory allocation requests across threads.
485 The defect is now corrected. Users should see a substantial increase in
486 the concurent throughput of allocation requests for applications which
487 trigger this bug. Affected applications typically create and
488 destroy threads frequently. (Bug 19048 was reported and analyzed by
491 * There is now a --disable-timezone-tools configure option for disabling the
492 building and installing of the timezone related utilities (zic, zdump, and
493 tzselect). This is useful for people who build the timezone data and code
494 independent of the GNU C Library.
496 * The obsolete header <regexp.h> has been removed. Programs that require
497 this header must be updated to use <regex.h> instead.
499 * The obsolete functions bdflush, create_module, get_kernel_syms,
500 query_module and uselib are no longer available to newly linked binaries;
501 the header <sys/kdaemon.h> has been removed. These functions and header
502 were specific to systems using the Linux kernel and could not usefully be
503 used with the GNU C Library on systems with version 2.6 or later of the
506 * Optimized string, wcsmbs and memory functions for IBM z13.
507 Implemented by Stefan Liebler.
509 * Newly linked programs that define a variable called signgam will no longer
510 have it set by the lgamma, lgammaf and lgammal functions. Programs that
511 require signgam to be set by those functions must ensure that they use the
512 variable provided by the GNU C Library and declared in <math.h>, without
513 defining their own copy.
515 * The minimum GCC version that can be used to build this version of the GNU
516 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
517 still be used to compile programs using the GNU C Library.
519 Security related changes:
521 * An out-of-bounds value in a broken-out struct tm argument to strftime no
522 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
524 * The LD_POINTER_GUARD environment variable can no longer be used to disable
525 the pointer guard feature. It is always enabled. Previously,
526 LD_POINTER_GUARD could be used to disable security hardening in binaries
527 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
530 * An integer overflow in hcreate and hcreate_r could lead to an
531 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
533 * The catopen function no longer has unbounded stack usage. Reported by
536 * The nan, nanf and nanl functions no longer have unbounded stack usage
537 depending on the length of the string passed as an argument to the
538 functions. Reported by Joseph Myers. (CVE-2014-9761)
540 * A stack-based buffer overflow was found in libresolv when invoked from
541 libnss_dns, allowing specially crafted DNS responses to seize control
542 of execution flow in the DNS client. The buffer overflow occurs in
543 the functions send_dg (send datagram) and send_vc (send TCP) for the
544 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
545 family. The use of AF_UNSPEC triggers the low-level resolver code to
546 send out two parallel queries for A and AAAA. A mismanagement of the
547 buffers used for those queries could result in the response of a query
548 writing beyond the alloca allocated buffer created by
549 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
550 the overflow. Thanks to the Google Security Team and Red Hat for
551 reporting the security impact of this issue, and Robert Holiday of
552 Ciena for reporting the related bug 18665. (CVE-2015-7547)
554 The following bugs are resolved with this release:
556 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
557 [887] math: Math library function "logb" and "nextafter" inconsistent
558 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
559 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
560 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
561 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
563 [4404] localedata: German translation of "Alarm clock" is misleading
564 [6799] math: nextafter() and nexttoward() doen't set errno on
565 overflow/underflow errors
566 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
568 [10432] nis: _nss_nis_setnetgrent assertion failure
569 [11460] libc: fts has no LFS support
570 [12926] network: getaddrinfo()/make_request() may spin forever
571 [13065] nptl: Race condition in pthread barriers
572 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
573 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
575 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
576 [14912] libc: Rename non-installed bits/*.h headers
577 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
578 [15367] math: Let gcc use __builtin_isinf
579 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
580 [15421] math: lgamma wrongly sets signgam for ISO C
581 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
582 FE_INVALID with argument out of range
583 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
585 [15786] dynamic-link: ifunc resolver functions can smash function
587 [15918] math: Unnecessary check for equality in hypotf()
588 [16061] localedata: Review / update transliteration data
589 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
591 [16141] time: strptime %z offset restriction
592 [16171] math: drem should be alias of remainder
593 [16296] math: fegetround is pure?
594 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
595 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
597 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
598 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
600 [16422] math: [powerpc] math-float, math-double failing llrint tests with
601 "Exception "Inexact" set" on ppc32
602 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
603 [16517] math: Missing underflow exception from tanf/tan/tanl
604 [16519] math: Missing underflow exception from sinhf
605 [16520] math: Missing underflow exception from tanhf
606 [16521] math: Missing underflow exception from exp2
607 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
609 [16734] stdio: fopen calls mmap to allocate its buffer
610 [16961] math: nan function incorrect handling of bad sequences
611 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
612 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
613 [16985] locale: localedef: confusing error message when opening output
615 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
616 [17197] locale: Redundant shift character in iconv conversion output at
618 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
619 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
620 [17250] dynamic-link: static linking breaks nss loading
621 (getaddrinfo/getpwnam/etc...)
622 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
624 [17441] math: isnan() should use __builtin_isnan() in GCC
625 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
626 (related to lock elision)
627 [17787] manual: Exponent on page 324 of the PDF ends prematurely
628 [17886] time: strptime should be able to parse "Z" as a timezone with %z
629 [17887] time: strptime should be able to parse "+01:00" style timezones
630 [17905] libc: catopen() Multiple unbounded stack allocations
632 [18084] libc: backtrace (..., 0) dumps core on x86
633 [18086] libc: nice() sets errno to 0 on success
634 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
635 is too large (CVE-2015-8778)
636 [18251] dynamic-link: SONAME missing when audit modules provides path
637 [18265] libc: add attributes for wchar string and memory functions
638 [18370] math: csqrt missing underflows
639 [18421] libc: [hppa] read-only segment has dynamic relocations
640 [18472] libc: Obsolete syscall wrappers should be compat symbols
641 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
642 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
643 [18525] localedata: Remove locale timezone information
644 [18560] libc: [powerpc] spurious bits/ipc.h definitions
645 [18568] localedata: Update locale data to Unicode 8.0
646 [18589] locale: sort-test.sh fails at random
647 [18595] math: ctan, ctanh missing underflows
648 [18604] libc: assert macro-expands its argument
649 [18610] math: S390: fetestexcept() reports any exception if DXC-code
650 contains a vector instruction exception.
651 [18611] math: j1, jn missing errno setting on underflow
652 [18618] localedata: sync Chechen locale definitions with other *_RU
654 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
655 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
656 [18665] network: In send_dg, the recvfrom function is NOT always using the
657 buffer size of a newly created buffer (CVE-2015-7547)
658 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
660 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
662 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
663 [18699] math: tilegx cproj() for various complex infinities does not yield
665 [18724] libc: Harden put*ent functions against data injection
666 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
667 [18755] build: build errors with -DNDEBUG
668 [18757] stdio: fmemopen fails to set errno on failure
669 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
671 [18781] libc: openat64 lacks O_LARGEFILE
672 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
673 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
674 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
675 [18790] math: [ldbl-128ibm] tanhl inaccurate
676 [18795] libc: stpncpy fortification misses buffer lengths that are
678 [18796] build: build fails for --disable-mathvec
679 [18803] math: hypot missing underflows
680 [18820] stdio: fmemopen may leak memory on failure
681 [18823] math: csqrt spurious underflows
682 [18824] math: fma spurious underflows
683 [18825] math: pow missing underflows
684 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
685 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
686 [18870] build: sem_open.c fails to compile with missing symbol
688 [18872] stdio: Fix memory leak in printf_positional
689 [18873] libc: posix_fallocate overflow check ineffective
690 [18875] math: Excess precision leads incorrect libm
691 [18877] libc: arm: mmap offset regression
692 [18887] libc: memory corruption when using getmntent on blank lines
693 [18918] localedata: hu_HU: change time to HH:MM:SS format
694 [18921] libc: Regression: extraneous stat() and fstat() performed by
696 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
697 binaries (CVE-2015-8777)
698 [18951] math: tgamma missing underflows
699 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
701 [18953] localedata: lt_LT: change currency symbol to the euro
702 [18956] math: powf inaccuracy
703 [18961] math: [i386] exp missing underflows
704 [18966] math: [i386] exp10 missing underflows
705 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
706 [18969] build: multiple string test failures due to missing locale
708 [18970] libc: Reference of pthread_setcancelstate in libc.a
709 [18977] math: float / long double Bessel functions not in XSI POSIX
710 [18980] math: i386 libm functions return with excess range and precision
711 [18981] math: i386 scalb*, ldexp return with excess range and precision
712 [18982] stdio: va_list and vprintf
713 [18985] time: Passing out of range data to strftime() causes a segfault
715 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
716 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
717 [19012] locale: iconv_open leaks memory on error path
718 [19016] math: clog, clog10 inaccuracy
719 [19018] nptl: Mangle function pointers in tls_dtor_list
720 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
721 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
722 [19048] malloc: malloc: arena free list can become cyclic, increasing
724 [19049] math: [powerpc] erfc incorrect zero sign
725 [19050] math: [powerpc] log* incorrect zero sign
726 [19058] math: [x86_64] Link fail with -fopenmp and -flto
727 [19059] math: nexttoward overflow incorrect in non-default rounding modes
728 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
729 [19074] network: Data race in _res_hconf_reorder_addrs
730 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
731 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
732 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
734 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
736 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
737 [19086] manual: posix_fallocate64 documented argument order is wrong.
738 [19088] math: lround, llround missing exceptions close to overflow
740 [19094] math: lrint, llrint missing exceptions close to overflow threshold
741 [19095] math: dbl-64 lrint incorrect for 64-bit long
742 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
743 [19124] dynamic-link: ld.so failed to build with older assmebler
744 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
745 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
746 [19134] math: [powerpc32] lround, lroundf spurious exceptions
747 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
748 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
749 pthread_setaffinity_np
750 [19156] math: [ldbl-128] j0l spurious underflows
751 [19164] nptl: tst-getcpu fails with many possible CPUs
752 [19168] math: math/test-ildoubl and math/test-ldouble failure
753 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
754 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
756 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
757 (FE_NOMASK_ENV) do not clear SSE exceptions
758 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
759 _int_new_arena/reused_arena
760 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
761 [19201] math: dbl-64 remainder incorrect sign of zero result
762 [19205] math: bits/math-finite.h conditions do not match math.h and
764 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
765 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
766 for C99-based standards
767 [19212] libc: features.h not -Wundef clean
768 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
770 [19214] libc: Family and model identification for AMD CPU's are incorrect.
771 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
772 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
774 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
776 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
778 [19242] libc: strtol incorrect in Turkish locales
779 [19243] malloc: reused_arena can pick an arena on the free list, leading
780 to an assertion failure and reference count corruption
781 [19253] time: tzset() ineffective when temporary TZ did not include DST
783 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
784 [19270] math: [hppa] Shared libm missing __isnanl
785 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
786 MAP_HUGETLB and MAP_STACK defines
787 [19313] nptl: Wrong __cpu_mask for x32
788 [19347] libc: grantpt: try to force a specific gid even without pt_chown
789 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
790 [19350] math: [ldbl-128ibm] sinhl spurious overflows
791 [19351] math: [ldbl-128ibm] logl inaccurate near 1
792 [19363] time: x32: times() return value wrongly truncates/sign extends
794 [19367] dynamic-link: Improve branch prediction on Silvermont
795 [19369] network: Default domain name not reset by res_ninit when "search"
796 / "domain" entry is removed from resolv.conf
797 [19375] math: powerpc: incorrect results for POWER7 logb with negative
799 [19385] localedata: bg_BG: time separator should be colon, not comma
800 [19408] libc: linux personality syscall wrapper may erroneously return an
801 error on 32-bit architectures
802 [19415] libc: dladdr returns wrong names on hppa
803 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
804 IBM905, IBM907, and IBM909
805 [19439] math: Unix98 isinf and isnan functions conflict with C++11
806 [19443] build: build failures with -DDEBUG
807 [19451] build: Make check fails on test-double-vlen2
808 [19462] libc: Glibc failed to build with -Os
809 [19465] math: Wrong code with -Os
810 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
812 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
814 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
815 [19486] math: S390: Math tests fail with "Exception Inexact set".
816 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
817 [19550] libc: [mips] mmap negative offset handling inconsistent with other
819 [19590] math: Fail to build shared objects that use libmvec.so functions.
823 * The following bugs are resolved with this release:
825 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
826 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
827 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
828 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
829 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
830 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
831 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
832 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
833 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
834 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
835 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
836 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
837 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
838 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
839 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
840 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
841 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
842 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
843 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
844 18657, 18676, 18694, 18696, 18887.
846 * Cache information can be queried via sysconf() function on s390 e.g. with
847 _SC_LEVEL1_ICACHE_SIZE as argument.
849 * A buffer overflow in gethostbyname_r and related functions performing DNS
850 requests has been fixed. If the NSS functions were called with a
851 misaligned buffer, the buffer length change due to pointer alignment was
852 not taken into account. This could result in application crashes or,
853 potentially arbitrary code execution, using crafted, but syntactically
854 valid DNS responses. (CVE-2015-1781)
856 * The time zone file parser has been made more robust against crafted time
857 zone files, avoiding heap buffer overflows related to the processing of
858 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
859 large time zone data files. Overly long time zone specifiers in the TZ
860 variable no longer result in stack overflows and crashes.
862 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
863 for LD and GD on x86 and x86-64, has been implemented. You will need
864 binutils-2.24 or later to enable this optimization.
866 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
867 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
868 Hat). These updates cause user visible changes, such as the fix for bug
871 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
872 and getXXbyYY NSS calls for the same database, causing a denial-of-service
873 condition in some applications.
875 * Added vector math library named libmvec with the following vectorized x86_64
876 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
878 The library can be disabled with --disable-mathvec. Use of the functions is
879 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
880 Shared library libmvec.so is linked in as needed when using -lm (no need to
881 specify -lmvec explicitly for not static builds).
882 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
884 * A new fmemopen implementation has been added with the goal of POSIX
885 compliance. The new implementation fixes the following long-standing
886 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
887 old implementation is still present for use be by existing binaries.
889 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
890 releases. It has been fixed to match 2.19 and older, but binaries built
891 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
893 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
894 Contributed by Roland McGrath (Google).
896 * The header <regexp.h> is deprecated, and will be removed in a future
897 release. Use of this header will trigger a deprecation warning.
898 Application developers should update their code to use <regex.h> instead.
900 This header was formerly part of SUS, but was deprecated in 1994 and
901 removed from the standard in 2001. Also, the glibc implementation
902 leaks memory. See BZ#18681 for more details.
906 * The following bugs are resolved with this release:
908 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
909 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
910 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
911 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
912 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
913 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
914 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
915 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
916 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
917 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
920 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
921 too little memory for the to-be-scanned arguments and overflow the
922 allocated buffer. The implementation now correctly computes the required
923 buffer size when using malloc, and switches to malloc from alloca as
926 * A new semaphore algorithm has been implemented in generic C code for all
927 machines. Previous custom assembly implementations of semaphore were
928 difficult to reason about or ensure that they were safe. The new version
929 of semaphore supports machines with 64-bit or 32-bit atomic operations.
930 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
931 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
933 * Port to Altera Nios II has been contributed by Mentor Graphics.
935 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
936 implementations for powerpc64/powerpc64le.
937 Implemented by Adhemerval Zanella (IBM).
939 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
940 and powerpc64le. This may improve lock scaling of existing programs on
941 HTM capable systems. The lock elision code is only enabled with
942 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
943 powerpc will issue a transaction abort on every syscall to avoid side
944 effects being visible outside transactions.
946 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
947 AArch64. Contributed by ARM Ltd.
949 * i386 memcpy functions optimized with SSE2 unaligned load/store.
951 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
952 under certain input conditions resulting in the execution of a shell for
953 command substitution when the application did not request it. The
954 implementation now checks WRDE_NOCMD immediately before executing the
955 shell and returns the error WRDE_CMDSUB as expected.
957 * CVE-2012-3406 printf-style functions could run into a stack overflow when
958 processing format strings with a large number of format specifiers.
960 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
961 infinite loop if the DNS response contained a PTR record of an unexpected
964 * The minimum GCC version that can be used to build this version of the GNU
965 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
966 still be used to compile programs using the GNU C Library.
968 * The GNU C Library is now built with -Werror by default. This can be
969 disabled by configuring with --disable-werror.
971 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
973 * The obsolete sigvec function has been removed. This was the original
974 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
975 programs have been using instead for about 25 years. Of course, ABI
976 compatibility for old binaries using sigvec remains intact.
978 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
979 with newer versions of bison.
981 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
982 The original MIPS o32 hard-float ABI requires an FPU where double-precision
983 registers overlay two consecutive single-precision registers. MIPS32R2
984 introduced a new FPU mode (FR=1) where double-precision registers extend the
985 corresponding single-precision registers which is incompatible with the
986 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
987 require the use of FR=1 making a transition necessary. New o32 ABI
988 extensions enable users to migrate over time from the original o32 ABI
989 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
990 tracks the ABI of any loaded object and verifies that new objects are
991 compatible. Mode transitions will also be requested as required and
992 unsupportable objects will be rejected. The ABI checks include both soft and
993 hard float ABIs for o32, n32 and n64.
995 GCC 5 with GNU binutils 2.25 onwards:
996 It is strongly recommended that all o32 system libraries are built using the
997 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
998 with the original and all new o32 ABI extensions. Configure a MIPS GCC
999 compiler using --with-fp-32=xx to set this by default.
1003 * The following bugs are resolved with this release:
1005 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1006 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1007 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1008 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1009 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1010 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1011 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1012 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1013 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1014 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1015 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1016 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1017 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1018 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1019 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1021 * Reverted change of ABI data structures for s390 and s390x:
1022 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1023 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1024 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1025 are preserved pointing straight to the same implementation as the old ones.
1026 Given that, new callers will simply provide a too-big buffer to these
1027 functions. Any applications/libraries out there that embed jmp_buf or
1028 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1029 against 2.19 headers will have to rebuilt again. This is necessary in any
1030 case to revert the breakage in their ABI caused by the glibc change.
1032 * Support for file description locks is added to systems running the
1033 Linux kernel. The standard file locking interfaces are extended to
1034 operate on file descriptions, not file descriptors, via the use of
1035 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1036 are associated with an open file instead of a process.
1038 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1040 * The minimum Linux kernel version that this version of the GNU C Library
1041 can be used with is 2.6.32.
1043 * Running the testsuite no longer terminates as soon as a test fails.
1044 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1045 with PASS or FAIL lines for individual tests. A summary of the results is
1046 printed, including a list of failing lists, and "make check" exits with
1047 error status if there were any unexpected failures. "make check
1048 stop-on-test-failure=y" may be used to keep the old behavior.
1050 * The am33 port, which had not worked for several years, has been removed
1053 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1054 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1055 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1056 conflicted with POSIX (support for which was removed in 2.19), the
1057 interfaces those macros enabled remain available when compiling with
1058 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1059 test macros defined.
1061 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1063 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1064 This may improve lock scaling of existing programs on TX capable systems.
1065 The lock elision code is only built with --enable-lock-elision=yes and
1066 then requires a GCC version supporting the TX builtins. With lock elision
1067 default mutexes are elided via __builtin_tbegin, if the cpu supports
1068 transactions. By default lock elision is not enabled and the elision code
1071 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1072 copy the path argument. This allowed programs to cause posix_spawn to
1073 deference a dangling pointer, or use an unexpected pathname argument if
1074 the string was modified after the posix_spawn_file_actions_addopen
1077 * All supported architectures now use the main glibc sysdeps directory
1078 instead of some being in a separate "ports" directory (which was
1079 distributed separately before glibc 2.17).
1081 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1082 On configurations that support it (all Linux configurations), it's now
1083 used regardless of the --enable-add-ons switch to configure. It is no
1084 longer possible to build such configurations without pthreads support.
1086 * Locale names, including those obtained from environment variables (LANG
1087 and the LC_* variables), are more tightly checked for proper syntax.
1088 setlocale will now fail (with EINVAL) for locale names that are overly
1089 long, contain slashes without starting with a slash, or contain ".." path
1090 components. (CVE-2014-0475) Previously, some valid locale names were
1091 silently replaced with the "C" locale when running in AT_SECURE mode
1092 (e.g., in a SUID program). This is no longer necessary because of the
1095 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1096 with application code using Intel MPX instructions. (With all previous
1097 versions, the MPX register state could be clobbered when making calls
1098 into or out of a shared library.) Note that while the new dynamic
1099 linker is compatible with all known x86 hardware whether or not it
1100 supports Intel MPX, some x86 instruction-set emulators might fail to
1101 handle the new instruction encodings. This is known to affect Valgrind
1102 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1103 release), and might affect other tools that do instruction emulation.
1105 * Support for loadable gconv transliteration modules has been removed.
1106 The support for transliteration modules has been non-functional for
1107 over a decade, and the removal is prompted by security defects. The
1108 normal gconv conversion modules are still supported. Transliteration
1109 with //TRANSLIT is still possible, and the //IGNORE specifier
1110 continues to be supported. (CVE-2014-5119)
1112 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1113 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1114 resulting a denial-of-service security vulnerability in applications which
1115 use functions related to iconv. (CVE-2014-6040)
1119 * The following bugs are resolved with this release:
1121 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1122 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1123 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1124 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1125 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1126 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1127 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1128 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1129 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1130 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1131 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1132 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1133 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1134 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1135 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1136 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1137 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1138 16431, 16453, 16474, 16506, 16510, 16529
1140 * Slovenian translations for glibc messages have been contributed by the
1141 Translation Project's Slovenian team of translators.
1143 * The public headers no longer use __unused nor __block. This change is to
1144 support compiling programs that are derived from BSD sources and use
1145 __unused internally, and to support compiling with Clang's -fblock
1146 extension which uses __block.
1148 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1149 large collation sequences to optimize multiple passes. This cache
1150 computation may overflow for large collation sequences and may cause a
1151 stack or buffer overflow. This is now fixed to use a slower algorithm
1152 which does not use a cache if there is an integer overflow.
1154 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1155 rules for large collation sequences to optimize multiple passes and falls
1156 back to alloca if malloc fails, resulting in a possible stack overflow.
1157 The implementation now falls back to an uncached collation sequence lookup
1160 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1161 initialized for static applications resulting in the security feature
1162 being disabled. The pointer guard is now correctly initialized to a
1163 random value for static applications. Existing static applications need
1164 to be recompiled to take advantage of the fix (bug 15754).
1166 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1167 to the d_name member of struct dirent, or omit the terminating NUL
1168 character. (Bugzilla #14699).
1170 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1171 aligned_alloc functions could allocate too few bytes or corrupt the
1172 heap when passed very large allocation size values (Bugzilla #15855,
1175 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1176 for AF_INET6 has been fixed (Bugzilla #16072).
1178 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1179 pap_CW, quz_PE, the_NP.
1181 * Substantially revised locales: gd_GB, ht_HT
1183 * The LC_ADDRESS field was updated to support country_car for almost all
1186 * ISO 1427 definitions were updated.
1188 * ISO 3166 definitions were updated.
1190 * The localedef utility now supports --big-endian and --little-endian
1191 command-line options to generate locales for a different system from that
1192 for which the C library was built.
1194 * Binary locale files now only depend on the endianness of the system for
1195 which they are generated and not on other properties of that system. As a
1196 consequence, binary files generated with new localedef may be incompatible
1197 with old versions of the GNU C Library, and binary files generated with
1198 old localedef may be incompatible with this version of the GNU C Library,
1199 in the following circumstances:
1201 + Locale files may be incompatible on m68k systems.
1203 + Locale archive files (but not separate files for individual locales) may
1204 be incompatible on systems where plain "char" is signed.
1206 * The configure option --disable-versioning has been removed. Builds with
1207 --disable-versioning had not worked for several years.
1209 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1210 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1212 * SystemTap probes for malloc have been introduced.
1214 * SystemTap probes for slow multiple precision fallback paths of
1215 transcendental functions have been introduced.
1217 * Support for powerpc64le has been added.
1219 * The soft-float powerpc port now supports e500 processors.
1221 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1223 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1224 set of header declarations that are enabled by default, even when other
1225 feature test macros or compiler options such as -std=c99 would otherwise
1226 disable some of those declarations.
1228 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1229 conflict with POSIX. The libbsd-compat library (which was a dummy library
1230 that did nothing) has also been removed.
1232 * Preliminary documentation about Multi-Thread, Async-Signal and
1233 Async-Cancel Safety has been added.
1235 * Change of ABI data structures for s390 and s390x:
1236 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1237 allow for future hardware extensions. All library functions that accept or
1238 return these structures were versioned in order to provide backwards
1239 compatibility with existing code. However, not all cases can be handled
1240 with interface versioning. If an application embeds either structure into
1241 another structure and that structure is passed to another compilation unit
1242 which expects the newer larger-sized object then any access to the new
1243 fields will result in undefined behaviour. Similarly any access to fields
1244 that were moved by the enlarging of the structures will cause undefined
1245 behaviour. To fix the undefined behaviour all objects that are part of the
1246 final in-memory image must agree on the size of structures, and this may
1247 require recompilation.
1251 * The following bugs are resolved with this release:
1253 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1254 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1255 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1256 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1257 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1258 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1259 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1260 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1261 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1262 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1263 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1264 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1265 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1268 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1269 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1270 Distributions can re-enable building and using pt_chown via the new configure
1271 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1272 considerable security risks and should only be used if the distribution
1273 understands and accepts the risks.
1275 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1278 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1279 fixed (Bugzilla #15330).
1281 * Add support for calling C++11 thread_local object destructors on thread
1282 and program exit. This needs compiler support for offloading C++11
1283 destructor calls to glibc.
1285 * Improved worst case performance of libm functions with double inputs and
1288 * Support for priority inherited mutexes in pthread condition variables on
1289 non-x86 architectures.
1291 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1293 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1295 * Optimized string functions for ARM. Implemented by Will Newton and
1298 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1300 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1303 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1304 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1306 * Added a benchmark framework to track performance of functions in glibc.
1308 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1309 It is based on draft TS 18661 and currently enabled as a GNU extension.
1311 * On Linux, the clock function now uses the clock_gettime system call
1312 for improved precision, rather than old times system call.
1314 * Added support for version-3 tz format files. This is needed when using
1315 the tz database release 2013e or later, and affects a few unusual cases --
1316 currently only TZ='America/Godthab' for time stamps after 2037.
1318 * Added new API functions pthread_getattr_default_np and
1319 pthread_setattr_default_np to get and set the default pthread
1320 attributes of a process.
1322 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1323 This may improve lock scaling of existing programs on TSX capable systems.
1324 When the --enable-lock-elision=yes parameter is specified at configure
1325 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1328 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1329 availability). Implemented by Ryan S. Arnold.
1331 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1335 * The following bugs are resolved with this release:
1337 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1338 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1339 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1340 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1341 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1342 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1343 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1344 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1345 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1346 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1347 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1348 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1349 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1350 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1351 14879, 14889, 14893, 14898, 14914.
1353 * Optimization of memcpy for MIPS.
1355 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1356 EMFILE has been fixed (Bugzilla #14889).
1358 * The add-on ports collection is now distributed in the "ports" subdirectory
1359 of the main GNU C Library distribution, rather than separately.
1361 * Port to ARM AArch64 contributed by Linaro.
1363 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1364 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1366 Implemented by Andreas Krebbel.
1368 * The new function secure_getenv allows secure access to the environment,
1369 returning NULL if running in a SUID/SGID process. This function replaces
1370 the internal function __secure_getenv.
1372 * SystemTap static probes have been added into the dynamic linker.
1373 Implemented by Gary Benson.
1375 * Optimizations of string functions strstr, strcasestr and memmem.
1376 Implemented by Maxim Kuvyrkov.
1378 * The minimum Linux kernel version that this version of the GNU C Library
1379 can be used with is 2.6.16.
1381 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1382 powerpc POWER7. Implemented by Will Schmidt.
1384 * New configure option --disable-nscd builds the C library such that it
1385 never attempts to contact the Name Service Caching Daemon (nscd).
1386 New configure option --disable-build-nscd avoids building nscd itself;
1387 this is the default if --disable-nscd is used.
1389 * Improved support for cross-compilation, including cross-testing and
1390 bootstrap builds without a previously built glibc.
1392 * Several testsuite tests are now able to test multiple IFUNC variants of an
1393 interface, rather than just testing the one that would be chooen by
1396 * New configure options --with-bugurl and --with-pkgversion, for
1397 distributors to use to embed their bug-reporting and package version
1398 information in --help and --version output.
1400 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1401 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1402 allows creation of chroots without the procfs mounted on /proc.
1404 * The `crypt' function now fails if passed salt bytes that violate the
1405 specification for those values. On Linux, the `crypt' function will
1406 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1407 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1408 when the mode is enabled.
1410 * The `clock_*' suite of functions (declared in <time.h>) is now available
1411 directly in the main C library. Previously it was necessary to link with
1412 -lrt to use these functions. This change has the effect that a
1413 single-threaded program that uses a function such as `clock_gettime' (and
1414 is not linked with -lrt) will no longer implicitly load the pthreads
1415 library at runtime and so will not suffer the overheads associated with
1416 multi-thread support in other code such as the C++ runtime library.
1418 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1423 * The following bugs are resolved with this release:
1425 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1426 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1427 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1428 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1429 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1430 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1431 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1432 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1433 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1434 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1435 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1436 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1437 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1438 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1439 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1440 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1441 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1442 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1443 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1444 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1445 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1446 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1449 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1450 configuring glibc with:
1451 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1452 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1453 Implemented by H.J. Lu.
1457 + define static_assert
1459 + do not declare gets
1461 + declare at_quick_exit and quick_exit also for ISO C11
1463 + aligned_alloc. NB: The code is deliberately allows the size parameter
1464 to not be a multiple of the alignment. This is a moronic requirement
1465 in the standard but it is only a requirement on the caller, not the
1468 + timespec_get added
1470 + uchar.h support added
1472 + CMPLX, CMPLXF, CMPLXL added
1474 Implemented by Ulrich Drepper.
1476 * Support for the IA-64 has been moved to ports.
1478 * Remove support for anything but ELF binary format
1480 * Checking versions of poll, ppoll added.
1481 Implemented by Ulrich Drepper.
1483 * More generic and 64-bit performance optimizations to math functions.
1484 Implemented by Ulrich Drepper.
1486 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1487 headers and functions available at compile time as they were before
1488 version 2.14. This option will be removed at some time in the future
1489 after the TI-RPC library becomes fully sufficient for the needs of
1490 existing applications.
1492 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1493 Note that glibc is not expected to work with any Linux kernel version
1496 * New header <sys/auxv.h> and function getauxval allowing easy access to
1497 the AT_* key-value pairs passed from the Linux kernel. The header also
1498 defines the HWCAP_* bits associated with the AT_HWCAP key.
1500 * New locales: mag_IN
1502 * New configure option --enable-systemtap builds SystemTap static probes
1503 into libc for setjmp and longjmp and into libpthread for various operations.
1504 So far the setjmp/longjmp probes and some of the libpthread probes are
1505 provided only for i*86 and x86_64.
1506 Implemented by Roland McGrath and Rayson Ho.
1508 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1510 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1513 * More optimized functions for SPARC. Implemented by David S. Miller.
1515 * Improved support for cross-compilation, especially bootstrap builds
1516 without a previously built glibc.
1518 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1519 Chris Metcalf from Tilera.
1521 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1522 now supported for ARM processors.
1524 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1525 as the name of the dynamic linker, to distinguish it from the
1526 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1528 * Support for CRIS has been removed from ports.
1530 * A new class of installed header has been documented for low-level
1531 platform-specific functionality. PowerPC added the first instance with a
1532 function to provide time base register access. Contributed by Tulio
1533 Magno Quites Machado Filho.
1535 * ix86 configurations now install header files that are consistent with
1536 what x86-64 configurations install. These same header files can be used
1537 for -m32, -m64, or -mx32 builds.
1538 Contributed by H.J. Lu.
1540 * Math library bug fixes. A thorough audit of all open math library bugs was
1541 conducted by Joseph Myers. Significant progress was made on many math
1542 library bugs resulting in more accurate exceptions and function results.
1543 Many thanks to all those that contributed including Andreas Jaeger for his
1544 patch review and work on the x87 trigonometric instruction issues.
1546 * Timezone data is no longer installed. Timezone-related binaries and scripts
1547 will continue to be installed. Users should obtain their timezone data from
1548 their distribution provider or from the tzdata package at
1549 <ftp://munnari.oz.au/pub/>.
1553 * The following bugs are resolved with this release:
1555 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1556 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1557 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1558 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1559 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1560 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1561 13484, 13506, 13515, 13523, 13524, 13538, 13540
1563 * New program pldd to list loaded object of a process
1564 Implemented by Ulrich Drepper.
1566 * Add nss_db support back to glibc. No more dependency on Berkeley db
1567 and support for initgroups lookups.
1568 Implemented by Ulrich Drepper.
1570 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1571 Contributed by HJ Lu.
1573 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1574 Contributed by HJ Lu.
1576 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1577 on x86-32 and x86-64.
1578 Contributed by Liubov Dmitrieva.
1580 * Optimized strchr and strrchr for SSE on x86-32.
1581 Contributed by Liubov Dmitrieva.
1583 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1584 for x86-64 and x86-32.
1585 Contributed by Liubov Dmitrieva.
1587 * New interfaces: scandirat, scandirat64
1588 Implemented by Ulrich Drepper.
1590 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1591 Implemented by Ulrich Drepper.
1593 * nscd now also caches the netgroup database.
1594 Implemented by Ulrich Drepper.
1596 * Integrate libm with gcc's -ffinite-math-only option.
1597 Implemented by Ulrich Drepper.
1599 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1600 to math functions. Implemented by Ulrich Drepper.
1602 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1603 Implemented by Ulrich Drepper.
1605 * New Linux interfaces: process_vm_readv, process_vm_writev
1607 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1608 Implemented by Ulrich Drepper.
1610 * Optimized nearbyint and strcasecmp for PPC.
1611 Implemented by Adhemerval Zanella.
1613 * New locales: bho_IN, unm_US, es_CU, ta_LK
1617 * The following bugs are resolved with this release:
1619 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1620 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1621 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1622 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1623 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1624 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1625 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1626 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1627 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1628 12795, 12811, 12813, 12814, 12841
1630 * The RPC implementation in libc is obsoleted. Old programs keep working
1631 but new programs cannot be linked with the routines in libc anymore.
1632 Programs in need of RPC functionality must be linked against TI-RPC.
1633 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1635 Visible changes of this change include (obviously) the inability to link
1636 programs using RPC functions without referencing the TI-RPC library and the
1637 removal of the RPC headers from the glibc headers.
1638 Implemented by Ulrich Drepper.
1640 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1641 syncfs, setns, sendmmsg
1643 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1644 yue_HK, lij_IT, mhr_RU
1646 * New encodings: CP770, CP771, CP772, CP773, CP774
1648 * New program sotruss to trace calls through PLTs
1649 Implemented by Ulrich Drepper.
1651 * The malloc hook implementation is marked deprecated and will be removed
1652 from the default implementation in the next version. The design never
1653 worked ever since the introduction of threads. Even programs which do
1654 not create threads themselves can use multiple threads created internally.
1658 * The following bugs are resolved with this release:
1660 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1661 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1662 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1663 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1666 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1668 * POWER7 optimizations: memset, memcmp, strncmp
1670 * New optimized string functions for x86-64: strnlen (SSE2),
1671 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1672 Implemented by Ulrich Drepper.
1676 * The following bugs are resolved with this release:
1678 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1679 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1680 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1681 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1682 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1683 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1684 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1685 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1687 * New interfaces: pthread_getname_np, pthread_setname_np
1689 * New Linux interface: recvmmsg
1691 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1693 * The dynamic linker now recognizes supported ABI versions from the
1694 EI_ABIVERSION field in the ELF header.
1695 Implemented by Ulrich Drepper.
1697 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1698 will not be used to fill in password fields in the passwd.byname replies.
1699 Instead it is used to synthesize the shadow.byname table, should it be
1700 missing. This is a useful mode in some installations involving Solaris.
1701 Implemented by Ulrich Drepper.
1703 * New locales: kok_IN, sq_MK, cv_RU
1707 * The following bugs are resolved with this release:
1709 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1710 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1711 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1712 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1713 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1714 10789, 10817, 10823, 10840, 10847
1716 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1718 Implemented by Ulrich Drepper.
1720 * Checking version of longjmp added that fails if an uninitialized stack
1721 frame would be created. Implemented by Ulrich Drepper.
1723 * STT_GNU_IFUNC is now supported in static executables.
1724 Implemented by H.J. Lu.
1726 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1728 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1729 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1730 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1731 Contributed by H.J. Lu.
1733 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1734 Implemented by Ulrich Drepper.
1736 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1738 Contributed by H.J. Lu.
1740 * Support for fma instruction in AVX on x86-64.
1741 Implemented by H.J. Lu and Ulrich Drepper.
1743 * AVX support in x86-64 auditing support in ld.so.
1744 Implemented by H.J. Lu.
1746 * STB_GNU_UNIQUE support added.
1747 Implemented by Ulrich Drepper.
1749 * Implement second fallback mode for optimized DNS lookup for even more
1750 broken environments. If two requests from the same port are not
1751 handled correctly close the socket and open a new one before sending
1752 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1753 can be used to select this mode right away, instead of rediscovering the
1754 necessity is every process again.
1755 Implemented by Ulrich Drepper.
1757 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1758 Implemented by Adam Tkac.
1760 * Optimized iconv conversions for S390x.
1761 Implemented by Andreas Krebbel.
1763 * Using condvars with PI mutexes is now more efficient due to kernel
1764 support for requeueing to PI futexes. NPTL support added for x86-64.
1765 Implemented by Ulrich Drepper.
1767 * New locales: ps_AF, my_MM
1771 * The following bugs are resolved with this release:
1773 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1774 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1775 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1776 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1777 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1779 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1780 Implemented by Ulrich Drepper.
1782 * New Linux interfaces: accept4, fallocate, fallocate64.
1783 Implemented by Ulrich Drepper.
1785 * Correct declarations of string function when used in C++ code. This
1786 could lead to compile errors for invalid C++ code.
1788 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1791 * New POSIX 2008 interface: psiginfo
1792 Implemented by Ulrich Drepper.
1794 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1795 Implemented by Ulrich Drepper.
1797 * Support for selecting between multiple function definitions at runtime
1798 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1800 * The libcrypt library can now use the hash function implementations in
1801 NSS. Implemented by Ulrich Drepper.
1803 * The malloc implementation can be compiled to be less memory efficient
1804 but higher performing in multi-threaded programs.
1805 Implemented by Ulrich Drepper.
1807 * New locales: nan_TW@latin, ks_IN
1809 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1810 Implemented by Ulrich Drepper.
1812 * Extended printf hook support. It is possible to use user-defined types
1813 and extend existing format specifiers.
1814 Implemented by Ulrich Drepper.
1816 * Handling for group shadow files has been added.
1817 Implemented by Ulrich Drepper.
1819 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1820 servers (the case, e.g., for some people using the built-in DNS
1821 server in ADSL modems/routers). There is a once-per-process timeout
1822 in case of a broken server. To avoid it, users can run nscd or put
1823 'options single-request' in /etc/resolv.conf.
1824 Implemented by Ulrich Drepper.
1828 * The following bugs are resolved with this release:
1830 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1831 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1832 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1833 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1834 6968, 6974, 6980, 6995, 7008, 7009, 7029
1836 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1837 up at the same time. Implemented by Ulrich Drepper.
1839 * TLS descriptors for LD and GD on x86 and x86-64.
1840 Implemented by Alexandre Oliva.
1842 * getaddrinfo now handles DCCP and UDPlite.
1843 Implemented by Ulrich Drepper.
1845 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1846 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1847 Implemented by Ulrich Drepper.
1849 * New implementation of memmem, strstr, and strcasestr which is O(n).
1850 Implemented by Eric Blake.
1852 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1854 * Implement "e" option for popen to open file descriptor with the
1855 close-on-exec flag set. Implemented by Ulrich Drepper.
1857 * Implement "b" mode for fmemopen. In this mode writes writes don't
1858 implicitly add a NUL byte and seeks from the end of the buffer really
1859 use the buffer end, not the string length as the basis.
1860 Implemented by Ulrich Drepper.
1862 * Many functions, exported and internal, now atomically set the close-on-exec
1863 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1865 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1867 Implemented by Pravin Satpute.
1869 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1873 * The following bugs are resolved with this release:
1875 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1876 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1877 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1878 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1879 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1880 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1881 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1883 * New locales: bo_CN, bo_IN, shs_CA.
1885 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1887 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1888 Implemented by Pravin Satpute.
1890 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1892 * nscd caches now all timeouts for DNS entries
1893 Implemented by Ulrich Drepper.
1895 * nscd is more efficient and wakes up less often.
1896 Implemented by Ulrich Drepper.
1898 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1899 vdprintf, and obstack_vprintf.
1900 Implemented by Jakub Jelinek.
1902 * Faster memset for x86-64.
1903 Implemented by Harsha Jagasia and H.J. Lu.
1905 * Faster memcpy on x86.
1906 Implemented by Ulrich Drepper.
1908 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1909 Implemented by Ulrich Drepper.
1911 * Faster sqrt and sqrtf implemention for some PPC variants.
1912 Implemented by Steven Munroe.
1916 * The following bugs are resolved with this release:
1918 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1919 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1920 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1921 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1922 5071, 5103, 5104, 5112, 5113, 5184, 5186
1924 * More checking functions: fread, fread_unlocked, open*, mq_open.
1925 Implemented by Jakub Jelinek and Ulrich Drepper.
1927 * Extend fortification to C++. Implemented by Jakub Jelinek.
1929 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1930 by not recognizing 'a' as a modifier when those specs are requested.
1931 Implemented by Jakub Jelinek.
1933 * PPC optimizations to math and string functions.
1934 Implemented by Steven Munroe.
1936 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1937 options to be passed. Implemented by Ulrich Drepper.
1939 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1941 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1942 Implemented by Ulrich Drepper.
1944 * Handle private futexes in the NPTL implementation.
1945 Implemented by Jakub Jelinek and Ulrich Drepper.
1947 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1948 Implemented by Roland McGrath and Ulrich Drepper.
1950 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1952 * SHA-256 and SHA-512 based password encryption.
1953 Implemented by Ulrich Drepper.
1955 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1956 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1959 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1960 Implemented by Ulrich Drepper.
1964 * The following bugs are resolved with this release:
1966 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1967 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1968 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1969 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1970 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1971 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1972 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1975 * New Linux interfaces: epoll_pwait, sched_getcpu.
1977 * New generic interfaces: strerror_l.
1979 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1983 * The following bugs are resolved with this release:
1985 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1986 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1987 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1988 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1989 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1990 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1991 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1992 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1993 3225, 3251, 3252, 3253, 3273
1995 * For Linux, the sorting of addresses returned by getaddrinfo now also
1996 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1997 Implemented by Ulrich Drepper.
1999 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2000 Implemented by Ulrich Drepper.
2002 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2004 * New iconv module for MIK. Contributed by Alexander Shopov.
2006 * For sites with broken group and/or passwd database, the auto-propagate
2007 option of nscd can prevent creating ID lookup entries from the results
2008 of a name lookup and vice versa. This usually is no problem but some
2009 site might have problems with the default behavior.
2010 Implemented by Ulrich Drepper.
2012 * Iterating over entire database in NIS can be slow. With the
2013 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2014 to trade time for memory. The entire database will be read at once.
2015 Implemented by Ulrich Drepper.
2017 * The interfaces introduced in RFC 3542 have been implemented by
2020 * Support for the new ELF hash table format was added by Ulrich Drepper.
2022 * Support for priority inheritance mutexes added by Jakub Jelinek and
2025 * Support for priority protected mutexes added by Jakub Jelinek.
2027 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2028 or_IN, csb_PL, fy_NL, sr_ME.
2032 * More overflow detection functions.
2034 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2035 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2037 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2038 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2039 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2040 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2041 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2042 by Masahide Washizawa.
2044 * It is now possible to install audit libraries for the dynamic linker using
2045 LD_AUDIT. Implemented by Ulrich Drepper.
2047 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2048 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2049 For a libc and libpthread that works well on Linux 2.4 kernels, we
2050 recommend using the stable 2.3 branch.
2052 * The new function open_wmemstream acts like open_memstream,
2053 but uses a wchar_t wide character buffer.
2055 * The new function ppoll is an improved version of poll, similar to pselect.
2057 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2058 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2059 renameat, unlinkat, linkat, symlinkat, readlinkat.
2061 * New Linux kernel system calls: unshare,
2062 inotify_init, inotify_add_watch, inotify_rm_watch.
2064 * The euidaccess function is now also known by the alias eaccess,
2065 for compatibility with some other systems.
2067 * Timezone data updated to 2006b version.
2071 * The following bugs are resolved with this release:
2073 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2074 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2075 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2076 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2077 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2078 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2080 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2082 * As of this release, GCC 4 can be used to compile the C Library.
2084 * Timezone data updated to 2005m version.
2088 * The following bugs are resolved with this release:
2090 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2091 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2092 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2093 777, 787, 821, 822, 823, 825
2095 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2099 * Support for RFC 3678. Real implementations exist only for Linux so far.
2100 Implemented by Ulrich Drepper.
2102 * nscd can now cache entries persistently. Expiring entries are reloaded.
2103 For speedups the cache can be shared in memory with client processes.
2104 Implemented by Ulrich Drepper.
2106 * nscd can now perform SELinux checks.
2107 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2109 * getaddrinfo queries are now cached. Canonical name lookup is performed
2111 Implemented by Ulrich Drepper.
2113 * The nothrow function attribute is used when headers are used by gcc when
2114 compiling C code. This can avoid significant amounts of exception
2117 * The malloc functions perform more error checking and are stricter when
2118 it comes to reacting on errors. The default action is to terminate
2119 the process after showing an error message. Implemented by Ulrich Drepper.
2121 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2122 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2124 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2125 namespaces using the new function dlmopen(). This feature is of course,
2126 like most other dynamic loading functionality, not available in statically
2127 linked applications. Implemented by Ulrich Drepper.
2129 * Low-overhead boundary checking variants of string and some stdio functions
2130 were added. These are to be used in conjunction with a gcc patch by
2131 Jakub Jelinek which adds calls to these functions if possible.
2132 Implemented by Jakub Jelinek and Ulrich Drepper.
2134 * Old code for several operating systems and machine architectures that
2135 have not been in working condition in a long time have been removed from
2136 the main source tree maintained by the GNU C Library's maintainers.
2137 These files are now reside in the separate `ports' source module
2138 that is usable as an add-on when building the library.
2142 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2143 interrogate the dynamic linker, compatible with the Solaris interface.
2145 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2146 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2148 * getifaddrs now uses the netlink interface on Linux to get its information.
2149 Implemented by Thorsten Kukuk.
2151 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2152 Implemented by Ulrich Drepper.
2154 * support for non-executable stacks on x86 has been added. Changes mostly
2157 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2160 * getaddrinfo now performs destination address selection according to
2165 * Thread-safe interfaces for many functions that access locale data
2166 were added in version 2.3, but these features were omitted from NEWS.
2167 Many functions have variants with an `_l' suffix that take a `locale_t'
2168 object as a parameter rather than consulting the current locale.
2169 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2170 create and maintain `locale_t' objects. Additionally, the new function
2171 `uselocale' sets "the current locale" (as used by functions not so
2172 parameterized) set for an individual thread. These features were added
2173 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2175 * The functions getresuid, getresgid, setresuid, and setresgid, which
2176 have long been available on Linux, are now declared in <unistd.h>
2177 and are now also available on the Hurd.
2179 * ELF thread-local storage support (TLS) now works on x86-64.
2181 * The new dynamic string token $LIB is expanded in shared library names.
2182 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2184 * Aldy Hernandez contributed complete software floating point support for
2185 PowerPC machines with no FPU.
2187 * fexecve is implemented on Linux.
2189 * The `btowc' function should work at least twice as fast due to
2190 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2192 * With approriate thread add-ons cancelable functions are now implemented
2193 in libc.so as well. No need to call the function in libpthread. This
2194 change allowed to finally disable the incorrect and expensive handling
2195 of weak definition in ld.so.
2197 * Yet more PLT entries in libc.so have been removed. We finally arrived
2198 at the bare minimum. Startup times improved appropriately.
2200 * Support for the new Linux/x86 system call interface was added. The
2201 AT_SYSINFO auxiliary vector entry is recognized and handled.
2205 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2208 * iconv (the program and the interface) now accepts empty names (excluding
2209 options like //TRANSLIT) to mean "use charset of current locale".
2211 * localedef can now transliterate characters in strings which are not in
2212 the provided charmap. The information from the input locale is used.
2214 * Prelinking support was added for ELF targets. This requires additional
2215 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2217 * Read-only stdio streams now use mmap to speed up operation by eliminating
2218 copying and buffer underflows. To use add 'm' to the mode string of
2219 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2221 * The malloc functions were completely rewritten by Wolfram Gloger based
2222 on Doug Lea's malloc-2.7.0.c.
2224 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2225 implementation of regex.
2227 * Bruno Haible upgraded the iconv and locale implementation to support
2230 * Contents of the LC_* and LANG environment variables in the CEN style are
2231 not recognized anymore. It never was used. Change by Ulrich Drepper.
2233 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2234 thread-local storage (TLS) ABI on some platforms.
2235 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2237 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2238 EUC-JISX0213, and TSCII.
2240 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2241 BSD-compatible interface for getting all network interface addresses.
2242 Implementation for IPv4 by Roland McGrath.
2244 * Loading of locale data is faster due to the introduction of a locale
2245 archive. Implemented by Roland McGrath and Ulrich Drepper.
2247 * Startup times are significantly reduced by not using exported functions
2248 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2251 * Steven Munroe contributed a port to PowerPC64/Linux.
2255 * The Hurd now uses the GNU libio implementation of stdio rather than the
2256 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2258 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2259 with the same behavior as the Linux system call of the same name.
2263 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2264 128-bit long double format.
2266 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2267 IBM1161, and IBM1162 charsets.
2269 * Andreas Jaeger contributed a port to x86-64/Linux.
2271 * Peter Bruin contributed a port to PowerPC/Hurd.
2273 * libc functions using I/O streams now can handle wide-oriented streams
2276 * optimizations in the dynamic linker. Binaries created by recent binutils
2277 versions start up quicker due to reduced time spent on relocations.
2279 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2283 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2284 asinh, atanh, j0 for the 128-bit long double format.
2286 * Bruno Haible updated all the code handling Unicode in some form to
2287 support Unicode 3.1.
2289 * Speed of regex for single-byte locales is back to previous levels.
2290 Patch by Isamu Hasegawa.
2292 * Alpha, SPARC, and IA-64 now also using floating stacks.
2294 * Startup time of internationalized applications greatly improved through
2295 iconv cache. Use iconvconfig to generate the cache file.
2296 Contributed by Ulrich Drepper.
2298 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2299 severe performance problems. Patch by David Mosberger.
2301 * The Hurd port got a lot more functionality like AIO, various stdio
2302 extensions, etc. Mainly done by Roland McGrath.
2304 * mtrace can now lookup symbols in shared libraries.
2308 * Intel's IA-64 math library is largely integrated. It provides fast and
2309 accurate implementatations for most basic and standard math functions
2310 in float, double, and long double format.
2312 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2313 and asin for the 96-bit long double format and asin, log, tan for the
2314 128-bit long double format.
2316 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2317 The basic double functions exist today. Contributed by Abraham Ziv
2318 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2319 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2321 * An asynchronous name lookup library was added. The interface is designed
2322 after POSIX AIO. The proposal was circulated beforehand to get comments.
2323 No negative ones came in. Implemented by Ulrich Drepper.
2325 * Port to S390/64bit contributed by Martin Schwidefsky
2326 <schwidefsky@de.ibm.com>.
2328 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2329 of functions for Linux/IA-64.
2331 * The RPC code is now thread safe. Threads can now use the same service
2332 of different services at the same time. Patch by Eric Norum
2333 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2335 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2336 family of functions for Linux/S390.
2338 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2339 of functions for Linux/x86.
2341 * Port to Linux/CRIS contributed by Axis Communications.
2345 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2346 we can now check for namespace violations and missing declarations. The
2347 result is that almost all headers are now Unix-compliant (as defined in
2348 the upcoming XPG6). The negative side is that some programs might need
2349 corrections, too, if they depend on the incorrect form of the headers in
2350 previous versions which defined too many symbols and included too many
2353 * regex now handles multibyte character sets correctly.
2354 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2356 * iconv (the program) does now conform to the upcoming XPG6 and handles
2357 charmaps. Instead of the charset names the path of charmaps can be
2358 provided and the conversion happens based on this data.
2359 Contributed by Ulrich Drepper.
2361 * The locale program now provides detailed information about the installed
2366 only lists the names of the supported locales
2370 provides details such as country, language, and codeset name.
2371 Contributed by Ulrich Drepper.
2375 * The gencat program now parses the input file according to the charset
2376 selected by the LC_CTYPE category. This is important for stateful
2377 character sets. To make generating catalogs easier there is a way
2378 to overwrite the charset selected by the locale: before the first
2379 message or $ quote line the catalog can contain a line like
2381 $ codeset=ISO-8859-2
2383 to select the charset (ISO-8859-2 in this case).
2385 Implemented by Shinya Hanataka and Ulrich Drepper.
2387 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2388 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2389 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2391 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2392 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2394 * The LANGUAGE environment variable is now ignored unless the locale is
2395 changed from the default "C" locale.
2397 * The usual bug fixes.
2401 * Greg McGary added runtime support for bounds checking using gcc's
2402 new -fbounded-pointers option. ix86 target is complete. PowerPC
2405 * Thorsten Kukuk added secure mode support to nscd.
2407 * The Berkeley db libraries have been removed.
2409 Related, the nss_db module is now in a separate package since it
2410 obviously requires a database library being available.
2412 * Wide character I/O streams implemented by Ulrich Drepper.
2414 * Functions from the extended socket API added by Ulrich Drepper.
2416 * Functions feenableexcept and fedisableexcept to control the
2417 behaviour of individual exceptions have been added by Andreas Jaeger.
2419 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2421 * The resolver code has been updated from bind 8.2.3-T5B which supports
2422 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2425 This change could in some situations effect backward compatibility. Since
2426 now `_res' is a thread-local instead of a global variable, modifying it
2427 in one thread does not have any effect in other threads.
2429 The resolver library was also extended to allow IPv6 as the transport
2430 protocol for the requests. This work was done by Stig Venaas.
2432 * Compatibility code for K&R C compilers has been removed from the
2433 header files. A ISO C compiler is needed to use the library
2434 (conforming to either C89 or C99 standard).
2436 * Complete rewrite of the localedef program to support multibyte character
2437 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2438 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2439 Implemented by Ulrich Drepper.
2441 Bruno Haible significantly improved the generation and use of the data
2442 structures for the wide character tables.
2444 * Plural handling in gettext implemented by Ulrich Drepper.
2446 * The utmp daemon has been removed.
2448 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2450 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2453 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2455 * POSIX barriers implemented by Kaz Kylheku.
2457 * POSIX spawn function family implemented by Ulrich Drepper.
2459 * POSIX spinlocks are now available.
2461 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2463 * the configure option --enable-kernel=X.Y.Z allows to strip out
2464 compatibility for kernel versions before X.Y.Z. This is currently only
2465 implemented for Linux.
2467 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2468 field sin6_scope_id. This means that all programs using IPv6 should be
2469 recompiled. Don't expect binary compatibility with previous glibc
2472 * various conversion modules for IBM character sets contributed by
2475 * IA-64 port by Jes Sorensen and HJ Lu.
2489 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2491 * New xdr functions are added; some rpc functions are now 64bit clean.
2493 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2495 * Fixed known incompatibilities with glibc 2.0.
2497 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2499 * Optimized a number of functions (especially the ELF dynamic loader).
2501 * Update timezone data files.
2503 * lots of charmaps corrections
2505 * some new locale definitions and charmaps
2510 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2511 conform to POSIX member type requirements. Symbol versions have been
2512 adjusted as needed within the library, and for direct use by applications,
2513 but there is potential for problems if third-party libraries use
2514 struct timeval as part of their interface. This does not present
2515 a problem for X and other "essential" system libraries.
2517 * An additional locale model to support C++ Standard Library locale
2518 model and probably more was implemented by Ulrich Drepper.
2520 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2523 * Miles Bader provided the `argp' function family to support hierachical
2524 command line argument parsing, layered on top of getopt.
2526 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2528 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2531 * scanf recognizes the %a and %A format for scanning floating point numbers.
2533 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2534 information and interfaces for the available integer types.
2536 * about 130 new math functions were added to implement the ISO C9x math
2539 * the new header <complex.h> contains definitions of the complex math
2540 functions from ISO C 9X.
2542 * the new header <tgmath.h> defines generic macros to use complex or
2543 real valued functions.
2545 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2547 * Andreas Jaeger provided a test suite for the math library.
2549 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2551 * Ulrich Drepper added character set conversion functions (iconv).
2553 * Optimized string functions have been added.
2555 * The localedata addon is now part of glibc.
2557 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2559 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2560 daemon for NSS (nscd).
2562 Missing a better place here are some numbers on improvements. Under
2563 Linux 2.1.125 un-tar-ing the kernel sources takes
2567 using local files 12.19s 6.88s 22.91s
2569 using NIS 13.92s 8.91s 26.34s
2571 using NIS & nscd 10.37s 7.34s 25.30s
2573 using NIS+ 27.57s 30.37s 640.46s
2575 using NIS+ & nscd 10.25s 7.83s 26.51s
2577 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2579 Keep in mind that non-namelookup related operations dominate above times.
2580 It was just a common complain that using NIS+ unpacking the kernel is
2583 [1] The old nscd implementation is not available anymore since it was
2584 distributed with glibc up to version 2.0.98 and thus is now replaced.
2586 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2588 * Mark Kettenis provided a Hesiod NSS module.
2590 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2591 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2593 * rcmd can now handle netgroups (Dick Streefland).
2595 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2598 * Support for the IPv6 protocol has been added to the socket API, as per the
2599 latest draft standards.
2601 * Support for Linux 2.2 has been added.
2603 * Interface changes relative to the latest 2.0.x release:
2604 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2605 addseverity NEW: Unix98
2606 alphasort64 NEW: LFS
2607 argp_err_exit_status NEW: argp, GNU ext
2608 argp_error NEW: argp, GNU ext
2609 argp_failure NEW: argp, GNU ext
2610 argp_help NEW: argp, GNU ext
2611 argp_parse NEW: argp, GNU ext
2612 argp_program_bug_address NEW: argp, GNU ext
2613 argp_program_version NEW: argp, GNU ext
2614 argp_program_version_hook NEW: argp, GNU ext
2615 argp_state_help NEW: argp, GNU ext
2616 argp_usage NEW: argp, GNU ext
2617 authdes_create NEW: Secure RPC
2618 authdes_getucred NEW: Secure RPC
2619 authdes_pk_create NEW: Secure RPC
2620 backtrace NEW: GNU ext.
2621 backtrace_symbols NEW: GNU ext.
2622 backtrace_symbols_fd NEW: GNU ext.
2624 cacosf NEW: ISO C 9x
2625 cacosh NEW: ISO C 9x
2626 cacoshf NEW: ISO C 9x
2627 cacoshl NEW: ISO C 9x
2628 cacosl NEW: ISO C 9x
2635 casinf NEW: ISO C 9x
2636 casinh NEW: ISO C 9x
2637 casinhf NEW: ISO C 9x
2638 casinhl NEW: ISO C 9x
2639 casinl NEW: ISO C 9x
2641 catanf NEW: ISO C 9x
2642 catanh NEW: ISO C 9x
2643 catanhf NEW: ISO C 9x
2644 catanhl NEW: ISO C 9x
2645 catanl NEW: ISO C 9x
2646 cbc_crypt NEW: Secure RPC
2650 ccoshf NEW: ISO C 9x
2651 ccoshl NEW: ISO C 9x
2657 cimagf NEW: ISO C 9x
2658 cimagl NEW: ISO C 9x
2659 clearerr_locked REMOVED
2660 clntunix_create NEW: sunrpc ext
2662 clog10 NEW: ISO C 9x
2663 clog10f NEW: ISO C 9x
2664 clog10l NEW: ISO C 9x
2674 cprojf NEW: ISO C 9x
2675 cprojl NEW: ISO C 9x
2677 crealf NEW: ISO C 9x
2678 creall NEW: ISO C 9x
2683 csinhf NEW: ISO C 9x
2684 csinhl NEW: ISO C 9x
2687 csqrtf NEW: ISO C 9x
2688 csqrtl NEW: ISO C 9x
2692 ctanhf NEW: ISO C 9x
2693 ctanhl NEW: ISO C 9x
2695 des_setparity NEW: Secure RPC
2696 ecb_crypt NEW: Secure RPC
2697 endutxent NEW: Unix98
2699 exp10f NEW: ISO C 9x
2700 exp10l NEW: ISO C 9x
2704 fattach NEW: STREAMS
2705 fdetach NEW: STREAMS
2709 feclearexcept NEW: ISO C 9x
2710 fegetenv NEW: ISO C 9x
2711 fegetexceptflag NEW: ISO C 9x
2712 fegetround NEW: ISO C 9x
2713 feholdexcept NEW: ISO C 9x
2715 feraiseexcept NEW: ISO C 9x
2716 ferror_locked REMOVED
2717 fesetenv NEW: ISO C 9x
2718 fesetexceptflag NEW: ISO C 9x
2719 fesetround NEW: ISO C 9x
2720 fetestexcept NEW: ISO C 9x
2721 feupdateenv NEW: ISO C 9x
2722 fflush_locked REMOVED
2726 fgets_unlocked NEW: GNU ext.
2727 fileno_locked REMOVED
2739 fputc_locked REMOVED
2740 fputs_unlocked NEW: GNU ext.
2741 fread_unlocked NEW: GNU ext.
2746 fstatvfs NEW: Unix98
2750 ftruncate64 NEW: LFS
2752 fwrite_unlocked NEW: GNU ext.
2753 gai_strerror NEW: IPv6
2757 getchar_locked REMOVED
2759 getdate_err NEW: Unix98
2760 getdate_r NEW: GNU ext.
2762 getnameinfo NEW: IPv6
2763 getnetname NEW: Secure RPC
2764 getpmsg NEW: STREAMS
2765 getpt NEW: Unix98 PTY
2766 getrlimit64 NEW: LFS
2767 getutxent NEW: Unix98
2768 getutxid NEW: Unix98
2769 getutxline NEW: Unix98
2770 glob64 NEW: GNU ext.
2771 globfree64 NEW: GNU ext.
2772 gnu_get_libc_release NEW: GNU ext.
2773 gnu_get_libc_version NEW: GNU ext.
2774 grantpt NEW: Unix98 PTY
2775 host2netname NEW: Secure RPC
2777 iconv_close NEW: iconv
2778 iconv_open NEW: iconv
2779 if_freenameindex NEW: IPv6
2780 if_indextoname NEW: IPv6
2781 if_nameindex NEW: IPv6
2782 if_nametoindex NEW: IPv6
2783 in6addr_any NEW: IPv6
2784 in6addr_loopback NEW: IPv6
2785 inet6_isipv4mapped NEW: IPv6
2786 isastream NEW: STREAMS
2787 iswblank NEW: GNU ext.
2788 key_decryptsession NEW: Secure RPC
2789 key_decryptsession_pk NEW: Secure RPC
2790 key_encryptsession NEW: Secure RPC
2791 key_encryptsession_pk NEW: Secure RPC
2792 key_gendes NEW: Secure RPC
2793 key_get_conv NEW: Secure RPC
2794 key_secretkey_is_set NEW: Secure RPC
2795 key_setnet NEW: Secure RPC
2796 key_setsecret NEW: Secure RPC
2797 llrint NEW: ISO C 9x
2798 llrintf NEW: ISO C 9x
2799 llrintl NEW: ISO C 9x
2800 llround NEW: ISO C 9x
2801 llroundf NEW: ISO C 9x
2802 llroundl NEW: ISO C 9x
2807 lrintf NEW: ISO C 9x
2808 lrintl NEW: ISO C 9x
2809 lround NEW: ISO C 9x
2810 lroundf NEW: ISO C 9x
2811 lroundl NEW: ISO C 9x
2813 makecontext NEW: Unix98
2814 mempcpy NEW: GNU ext.
2817 modify_ldt NEW: kernel
2821 nearbyint NEW: ISO C 9x
2822 nearbyintf NEW: ISO C 9x
2823 nearbyintl NEW: ISO C 9x
2824 netname2host NEW: Secure RPC
2825 netname2user NEW: Secure RPC
2826 nexttoward NEW: ISO C 9x
2827 nexttowardf NEW: ISO C 9x
2828 nexttowardl NEW: ISO C 9x
2832 passwd2des NEW: Secure RPC
2834 pow10f NEW: GNU ext.
2835 pow10l NEW: GNU ext.
2838 printf_size NEW: GNU ext.
2839 printf_size_info NEW: GNU ext.
2840 profil_counter REMOVED
2841 pthread_mutexattr_getkind_np REPLACED
2842 pthread_mutexattr_setkind_np REPLACED
2843 ptsname NEW: Unix98 PTY
2844 ptsname_r NEW: Unix98 PTY
2846 putchar_locked REMOVED
2847 putgrent NEW: GNU ext.
2849 putpmsg NEW: STREAMS
2850 pututxline NEW: Unix98
2854 readdir64_r NEW: LFS
2855 remquo NEW: ISO C 9x
2856 remquof NEW: ISO C 9x
2857 remquol NEW: ISO C 9x
2859 roundf NEW: ISO C 9x
2860 roundl NEW: ISO C 9x
2862 scalbln NEW: ISO C 9x
2863 scalblnf NEW: ISO C 9x
2864 scalblnl NEW: ISO C 9x
2866 sendfile NEW: kernel
2867 setcontext NEW: Unix98
2868 setrlimit64 NEW: LFS
2869 setutxent NEW: Unix98
2871 sigignore NEW: Unix98
2872 sigqueue NEW: POSIX.1b
2873 sigrelse NEW: Unix98
2874 sigset NEW: POSIX.1b
2875 sigtimedwait NEW: POSIX.1b
2876 sigwaitinfo NEW: POSIX.1b
2877 sincos NEW: GNU ext.
2878 sincosf NEW: GNU ext.
2879 sincosl NEW: GNU ext.
2883 strcasestr NEW: GNU ext.
2884 strtoimax NEW: ISO C 9x
2885 strtoumax NEW: ISO C 9x
2886 strverscmp NEW: GNU ext.
2887 svcauthdes_stats NEW: Secure RPC
2888 svcunix_create NEW: sunrpc etx
2889 svcunixfd_create NEW: sunrpc ext
2890 swapcontext NEW: Unix98
2891 tcgetsid NEW: Unix98 PTY
2892 tdestroy NEW: GNU ext.
2893 tgamma NEW: ISO C 9x
2894 tgammaf NEW: ISO C 9x
2895 tgammal NEW: ISO C 9x
2899 truncf NEW: ISO C 9x
2900 truncl NEW: ISO C 9x
2902 unlockpt NEW: Unix98 PTY
2903 updwtmpx NEW: Unix98
2904 user2netname NEW: Secure RPC
2905 utmpxname NEW: Unix98
2906 versionsort NEW: GNU ext.
2907 versionsort64 NEW: GNU ext.
2909 wcscasecmp NEW: GNU ext.
2910 wcsncasecmp NEW: GNU ext.
2911 wcsnlen NEW: GNU ext.
2912 wcstoimax NEW: ISO C 9x
2913 wcstoll NEW: ISO C 9x
2914 wcstoull NEW: ISO C 9x
2915 wcstoumax NEW: ISO C 9x
2917 wordexp NEW: POSIX.2
2918 wordfree NEW: POSIX.2
2919 write_profiling REMOVED
2920 xdecrypt NEW: Secure RPC
2921 xdr_authdes_cred NEW: Secure RPC
2922 xdr_authdes_verf NEW: Secure RPC
2923 xdr_cryptkeyarg NEW: Secure RPC
2924 xdr_cryptkeyarg2 NEW: Secure RPC
2925 xdr_cryptkeyres NEW: Secure RPC
2926 xdr_getcredres NEW: Secure RPC
2927 xdr_key_netstarg NEW: Secure RPC
2928 xdr_key_netstres NEW: Secure RPC
2929 xdr_keybuf NEW: Secure RPC
2930 xdr_keystatus NEW: Secure RPC
2931 xdr_netnamestr NEW: Secure RPC
2932 xdr_sizeof NEW: Secure RPC
2933 xdr_unixcred NEW: sunrpc ext
2934 xencrypt NEW: Secure RPC
2935 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2946 * inet_ntoa is thread-safe
2948 * updwtmp is moved from libutil to libc
2950 * rewrite of cbrt function
2952 * update of timezone data
2966 * add atoll function
2968 * fix complex problems in Berkeley DB code
2970 * fix math functions
2974 * fixed lots of header problems (especially Linux/GNU specific)
2976 * dynamic loader preserves all registers
2978 * Roland McGrath provided support for handling of auxiliary objects in
2979 the ELF dynamic loader.
2981 * support for parallel builds is improved
2985 * GNU extensions are no longer declared by default. To enable them you
2986 must define the macro `_GNU_SOURCE' in your program or compile with
2989 * The library has changed from using GNU ld symbol aliases to using weak
2990 symbols where available. The ELF object file format supports weak
2991 symbols; GNU ld also supports weak symbols in the a.out format. (There
2992 is also now support for other GNU ld extensions in ELF. Use the
2993 `--with-elf' option to configure to indicate you have ELF, and
2994 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2995 of many files which contained only symbol aliases, reducing the size of
2996 the source and the compiled library; many other files were renamed to
2997 less cryptic names previously occupied by the symbol alias files.
2998 There is a new header file <elf.h> for programs which operate on
2999 files in the ELF format.
3001 * Converted to Autoconf version 2, so `configure' has more options.
3002 Run `configure --help' to see the details.
3004 * The library can now be configured to build profiling, highly-optimized
3005 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3006 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3007 `configure' enable building these extra libraries. The shared library is
3008 built by default when using both ELF and GNU ld. When shared libraries
3009 are enabled, the new library `-ldl' is available for arbitrary run-time
3010 loading of shared objects; its interface is defined in <dlfcn.h>. The
3011 new header file <link.h> gives access to the internals of the run-time
3012 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3013 application of same name on other systems and it provides information
3014 about dynamically linked binaries.
3016 * The C library now provides the run-time support code for profiling
3017 executables compiled with `-pg'. Programs can control the profiling code
3018 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3019 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3020 the support for this file format was contributed by David Mosberger-Tang.
3022 * The math code has been replaced with a math library based on fdlibm from
3023 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3024 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3025 functions. The math functions now reside in a separate library, so
3026 programs using them will need to use `-lm' their linking commands.
3028 * John C. Bowman contributed optimized ix87 assembler inline functions.
3030 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3031 mechanism similar to that found in Solaris 2. This is now used for the
3032 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3033 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3034 file controls what services are used for each individual database. This
3035 works by loading shared libraries with names specified in `nsswitch.conf',
3036 so service modules can be changed or added at any time without even
3037 relinking any program. Currently there are the file, db, and NIS based
3038 NSS services available.
3040 * The new functions `strtoq' and `strtouq' parse integer values from
3041 strings, like `strtol' and `strtoul', but they return `long long int' and
3042 `unsigned long long int' values, respectively (64-bit quantities).
3044 * The new functions `strtof' and `strtold' parse floating-point values from
3045 strings, like `strtod', but they return `float' and `long double' values,
3046 respectively (on some machines `double' and `long double' are the same).
3048 * Ulrich Drepper has contributed new implementations of the floating-point
3049 printing and reading code used in the `printf' family of functions and
3050 `strtod', `strtof', and `strtold'. These new functions are perfectly
3051 accurate, and much faster than the old ones.
3053 * The implementation of the POSIX locale model was completely rewritten by
3054 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3055 to compile the POSIX locale definition.
3057 * The former dummy implementations of the strcoll and strxfrm function are
3058 now replaced by fully functional code contributed by Ulrich Drepper. The
3059 collation information comes from the POSIX locale definitions.
3061 * The new header <langinfo.h> defines an interface for accessing
3062 various locale-dependent data (using the locale chosen with `setlocale').
3064 * Ulrich Drepper has contributed a new suite of functions for operation on
3065 wide-character and multibyte-character strings, in <wchar.h>;
3066 and classification and case conversion of wide characters, in <wctype.h>.
3067 These new functions are conforming to the ISO C, Amendement 1 specification.
3069 * There is now a second implementation of the standard I/O library available.
3070 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3071 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3073 * You can now use positional parameter specifications in format strings
3074 for the `printf' and `scanf' families of functions. For example,
3075 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3076 ``Number 6, Mr Jones''. This is mainly useful when providing different
3077 format strings for different languages, whose grammars may dictate
3078 different orderings of the values being printed. To support this
3079 feature, the interface for `register_printf_handler' has changed; see
3080 the header file <printf.h> for details.
3082 * The `printf' and `scanf' families of functions now understand a new
3083 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3084 to group numbers as indicated by the locale; for `scanf' and friends, this
3085 says to accept as valid only a number with all the proper grouping
3086 separators in the right places. In the default "C" locale, numbers are
3087 not grouped; but locales for specific countries will define the usual
3088 conventions (i.e. separate thousands with `,' in the US locale).
3090 * The pgrp functions have been regularized, slightly incompatibly but much
3091 less confusingly. The core functions are now `getpgid' and `setpgid',
3092 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3093 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3094 provided for compatibility. There is no longer an incompatible `getpgrp'
3095 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3097 * The new header file <fts.h> and suite of functions simplify programs that
3098 operate on directory trees. This code comes from 4.4 BSD.
3100 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3101 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3102 NSS scheme used in glibc.
3104 * There is a new malloc debugging hook `__memalign_hook'.
3106 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3107 `unsigned int' in <sys/types.h>. These are for compatibility only and
3108 their use is discouraged.
3110 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3111 done differently, so that it works even without GNU ld.
3113 * New function `euidaccess' checks allowed access to a file like `access',
3114 but using the effective IDs instead of the real IDs.
3116 * The time zone data files have been updated for the latest and greatest
3117 local time conventions of the countries of the world.
3119 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3122 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3123 for formatting floating-point numbers. They are provided only for
3124 compatibility; new programs should use `sprintf' instead. There are
3125 also equivalent function for the `long double' floating-point type and
3126 all functions also exist in a reentrant form.
3128 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3129 functions for maintaining the login-record files (primarily of use to
3130 system programs such as `login'), and convenient functions for
3131 allocating and initializing a pseudo-terminal (pty) device.
3133 * Ulrich Drepper has contributed new support for System V style
3134 shared memory and IPC on systems that support it.
3136 * Ulrich Drepper has contributed several miscellaneous new functions found
3137 in System V: The `hsearch' family of functions provide an effective
3138 implementation of hash tables; `a64l' and `l64a' provide a very simple
3139 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3142 * Ulrich Drepper has contributed new reentrant counterparts for the
3143 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3145 * Ulrich Drepper has contributed new, highly-optimized versions of several
3146 string functions for the i486/Pentium family of processors.
3148 * Ulrich Drepper has updated the Linux-specific code, based largely
3149 on work done in Hongjiu Lu's version of GNU libc for Linux.
3150 The GNU library now supports Linux versions 2.0.10 and later,
3151 using the ELF object file format (i[3456]86-*-linux).
3153 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3155 * David Mosberger-Tang and Richard Henderson have ported the C library
3156 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3157 dynamic linking support for ELF/Alpha.
3159 * Richard Henderson contributed several Alpha optimized assembler function
3160 for arithmetic and string handling.
3162 * Ulrich Drepper has contributed a new set of message catalog functions to
3163 support multiple languages using the <libintl.h> interface, for use with
3164 his new package GNU gettext. Translation volunteers have contributed
3165 catalogs of the library's messages in Spanish, German, and Korean.
3167 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3168 program and the `catgets' function for reading the catalog files it
3169 creates. (The <libintl.h> interface is preferred; we include the
3170 <nl_types.h> interface using `catgets' only for source compatibility with
3171 programs already written to use it.)
3173 * New header file <values.h> gives SVID-compatible names for <limits.h>
3176 * Various new macros, declarations, and small header files for compatibility
3179 * New function `group_member' is a convenient way to check if a process has
3180 a given effective group ID.
3182 * When using GCC 2.7 and later, the socket functions are now declared in a
3183 special way so that passing an argument of type `struct sockaddr_in *',
3184 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3185 `struct sockaddr *' type, does not generate a type-clash warning.
3187 * New function `error' declared in header file <error.h> is a convenient
3188 function for printing error messages and optionally exiting; this is the
3189 canonical function used in GNU programs. The new functions `err', `warn',
3190 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3191 doing the same thing.
3193 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3194 POSIX.2 `glob' function to do ~ and {...} expansion.
3196 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3197 `clearenv' which is used in POSIX.9 is also available.
3199 * New function `getsid' returns session ID number on systems that support it.
3201 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3202 files <db.h> and <mpool.h> provide a rich set of functions for several
3203 types of simple databases stored in memory and in files, and <ndbm.h> is
3204 an old `ndbm'-compatible interface using the `db' functions. Link with
3205 `-ldb' to get these functions.
3207 * New macro `strdupa' copies a string like `strdup', but uses local stack
3208 space from `alloca' instead of dynamic heap space from `malloc'.
3210 * New function `strnlen' is like `strlen' but searches only a given maximum
3211 number of characters for the null terminator. `stpncpy', `strndup' and
3212 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3215 * New function `statfs' in header <sys/statfs.h>.
3217 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3218 provide convenient functions for operating on blocks of null-terminated
3221 * A new suite of functions in <utmp.h> handle all the details of reading
3222 and writing the utmp file.
3224 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3227 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3228 completely POSIX compliant and also implemented the extended functionality
3229 to handle alternate digit representation and alternate era date formats.
3231 * Ulrich Drepper provided an implementation of the `strptime' function
3232 defined in XPG4.2 which transforms a string into a `struct tm' value.
3234 * Paul Eggert provided the tzselect shell script as part of the timezone
3235 code. The shell script makes it easy to select the correct timezone
3238 * The implementation of the malloc family of functions is completely replaced
3239 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3240 The implementation uses the mmap function (if available) and it is
3241 optimized for the use in multi threaded programs.
3243 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3244 functions. This new functionality is usable by specifying a special
3245 salt string and it is compatible with implementation on *BSD systems.
3247 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3248 `getsubopt' to handle second level command line options, `bsd_signal'
3249 to access BSD style `signal' functionality, the obsolete `regexp' style
3252 * the `lchown' function is available on system which support this
3255 * The implementation of the shadow password handling function was contributed
3258 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3260 * POSIX.1g support was added. The <sys/select.h> header is available,
3261 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3262 implementation of `getaddrinfo'.
3266 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3268 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3269 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3271 * The new function `daemon' from 4.4 BSD is useful for server programs that
3272 want to put themselves in the background.
3274 * Joel Sherrill has contributed support for several standalone boards that
3275 run without an operating system.
3277 * `printf', `scanf' and friends now accept a `q' type modifier for long
3278 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3280 * All of the code taken from BSD (notably most of the math and networking
3281 routines) has been updated from the BSD 4.4-Lite release.
3283 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3285 * The new functions `getdomainname' and `setdomainname' fetch or change the
3286 YP/NIS domain name. These are system calls which exist on systems which
3289 * The time zone data files have been updated for the latest international
3292 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3293 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3297 * The C library now includes support for Sun RPC, from Sun's free
3298 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3299 are included. (There is still no support for YP.)
3301 * Tom Quinn has contributed a port of the C library to SGI machines running
3302 Irix 4 (mips-sgi-irix4).
3304 * The new `lockf' function is a simplified interface to the locking
3305 facilities of `fcntl', included for compatibility.
3307 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3309 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3311 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3314 * The error message printed by `assert' for a failed assertion now includes
3315 the name of the program (if using GNU ld) and the name of the calling
3316 function (with versions of GCC that support this).
3318 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3320 * The library now includes the <sys/mman.h> header file and memory
3321 management functions `mmap', `munmap', `mprotect', `msync', and
3322 `madvise', on systems that support those facilities.
3324 * The interface for `mcheck' has changed slightly: the function called to
3325 abort the program when an allocation inconsistency is detected now takes
3326 an argument that indicates the type of failure. The new function
3327 `mprobe' lets you request a consistency check for a particular block at
3328 any time (checks are normally done only when you call `free' or `realloc'
3331 * It is now possible to easily cross-compile the C library, building on one
3332 system a library to run on another machine and/or operating system. All
3333 you need to do is set the variable `HOST_CC' in `configparms' to the
3334 native compiler for programs to run on the machine you are building on (a
3335 few generator programs are used on Unix systems); set `CC' to the
3338 * The new function `fexecve' (only implemented on the GNU system) executes
3339 a program file given a file descriptor already open on the file.
3343 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3344 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3346 * You can set the variable `libprefix' in `configparms' to specify a prefix
3347 to be prepended to installed library files; this makes it easy to install
3348 the GNU C library to be linked as `-lgnuc' or whatever.
3350 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3351 copies a limited number of characters from a string, and returns the
3352 address of the last character written.
3354 * You no longer need to check for whether the installed `stddef.h' is
3355 compatible with the GNU C library. configure now checks for you.
3357 * You can now define a per-stream `fileno' function to convert the
3358 stream's cookie into an integral file descriptor.
3360 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3361 allocates zero bytes of storage, and returns a unique pointer which
3362 you can pass to `realloc' or `free'. The behavior is undefined if
3363 you dereference this pointer.
3365 * The C library now runs on Sony NEWS m68k machines running either
3366 NewsOS 3 or NewsOS 4.
3368 * The new `syscall' function is a system-dependent primitive function
3369 for invoking system calls. It has the canonical behavior on Unix
3370 systems, including unreliable return values for some calls (such as
3371 `pipe', `fork' and `getppid').
3373 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3374 to `EAGAIN', which is the preferred name. On systems whose kernels
3375 use two distinct codes, the C library now translates EWOULDBLOCK to
3376 EAGAIN in every system call function.
3380 * The GNU C Library Reference Manual is now distributed with the library.
3381 `make dvi' will produce a DVI file of the printed manual.
3382 `make info' will produce Info files that you can read on line using C-h i
3383 in Emacs or the `info' program.
3384 Please send comments on the manual to bug-glibc-manual@gnu.org.
3386 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3388 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3390 * Jason Merrill has contributed a port to the Sequent Symmetry running
3391 Dynix version 3 (i386-sequent-dynix).
3393 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3394 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3396 * New function `memory_warnings' lets you arrange to get warnings when
3397 malloc is running out of memory to allocate, like Emacs gives you.
3399 * The C library now contains the relocating allocator used in Emacs 19 for
3400 its editing buffers. This allocator (ralloc) minimizes allocation
3401 overhead and fragmentation by moving allocated regions around whenever it
3402 needs to. You always refer to a ralloc'd region with a "handle" (a
3403 pointer to a pointer--an object of type `void **').
3405 * There is a new `printf' format: `%m' gives you the string corresponding
3406 to the error code in `errno'.
3408 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3409 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3410 pass, the `a' modifier says to fill in a `char **' you pass with a
3413 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3414 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3415 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3417 * `mkstemp' is a traditional Unix function to atomically create and open a
3418 uniquely-named temporary file.
3422 * The standard location for the file that says what the local timezone is
3423 has changed again. It is now `/usr/local/etc/localtime' (or more
3424 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3426 * The distribution no longer contains any files with names longer than 14
3429 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3430 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3432 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3436 * The configuration process has changed quite a bit. The `configure'
3437 script is now used just like the configuration scripts for other GNU
3438 packages. The `sysdeps' directory hierarchy is much rearranged.
3439 The file `INSTALL' explains the new scheme in detail.
3441 * The header files no longer need to be processed into ANSI C and
3442 traditional C versions. There is just one set of files to install, and
3443 it will work with ANSI or old C compilers (including `gcc -traditional').
3445 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3446 MIPS DECStation running Ultrix 4.
3448 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3449 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3450 made itself into a shared library.
3452 * Yet further improved support for the i386, running 4.3 BSD-like systems
3453 (such as Mach 3 with the Unix single-server), or System V.
3455 * New function `strncasecmp' to do case-insensitive string comparison
3456 with limited length.
3458 * New function `strsep' is a reentrant alternative to `strtok'.
3460 * New functions `scandir' and `alphasort' for searching directories.
3462 * New function `setenv' is a better interface to `putenv'.
3464 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3465 function for traversing a directory tree.
3467 * The GNU obstack package is now also part of the C library.
3468 The new function `open_obstack_stream' creates a stdio stream that
3469 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3470 formatted output directly to an obstack.
3472 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3473 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3475 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3477 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3478 things to your strings.
3480 * There are some new test programs: test-fseek, testmb, and testrand.
3482 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3483 These ports are not finished, but are a good starting place for really
3484 supporting those systems.
3486 * `/etc/localtime' is now the standard location for the file that says what
3487 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3488 This follows the general principle that `/etc' is the place for all local
3489 configuration files.
3491 * The C library header files now use `extern "C"' when used by the C++
3492 compiler, so the C library should now work with C++ code.
3494 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3495 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3498 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3499 function which uses the `merge sort' algorithm, and is said to be
3500 significantly faster than the old GNU `qsort' function. Merge sort is
3501 now the standard `qsort' function. The new algorithm can require a lot
3502 of temporary storage; so, the old sorting function is called when the
3503 required storage is not available.
3505 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3506 provides the Unix `crypt' function, plus some other entry points.
3508 * The code and header files taken from 4.4 BSD have been updated with the
3509 latest files released from Berkeley.
3511 ----------------------------------------------------------------------
3512 Copyright information:
3514 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3516 Permission is granted to anyone to make or distribute verbatim copies
3517 of this document as received, in any medium, provided that the
3518 copyright notice and this permission notice are preserved,
3519 thus giving the recipient permission to redistribute in turn.
3521 Permission is granted to distribute modified versions
3522 of this document, or of portions of it,
3523 under the above conditions, provided also that they
3524 carry prominent notices stating who last changed them.
3527 version-control: never