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.
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 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
72 for the Linux quota interface which predates kernel version 2.4.22 has
75 * The malloc_get_state and malloc_set_state functions have been removed.
76 Already-existing binaries that dynamically link to these functions will
77 get a hidden implementation in which malloc_get_state is a stub. As far
78 as we know, these functions are used only by GNU Emacs and this change
79 will not adversely affect already-built Emacs executables. Any undumped
80 Emacs executables, which normally exist only during an Emacs build, should
81 be rebuilt by re-running “./configure; make” in the Emacs build tree.
83 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
84 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
85 “no-ip6-dotint” had already been the default, and support for the
86 “ip6-dotint” option was removed from the Internet in 2006.
88 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
89 flag from <resolv.h> have been removed. The option relied on a
90 backwards-incompatible DNS extension which was never deployed on the
93 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
94 in the <resolv.h> header file have been deprecated. They were already
97 * DNSSEC-related declarations and definitions have been removed from the
98 <arpa/nameser.h> header file, and libresolv will no longer attempt to
99 decode the data part of DNSSEC record types. Previous versions of glibc
100 only implemented minimal support for the previous version of DNSSEC, which
101 is incompatible with the currently deployed version.
103 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
104 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
105 <arpa/nameser.h> header file because the distinction between RR types and
106 meta-RR types is not officially standardized, subject to revision, and
107 thus not suitable for encoding in a macro.
109 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
110 and rhook members of the res_state type in <resolv.h> have been removed.
111 The glibc stub resolver did not support these hooks, but the header file
112 did not reflect that.
114 * For multi-arch support it is recommended to use a GCC which has
115 been built with support for GNU indirect functions. This ensures
116 that correct debugging information is generated for functions
117 selected by IFUNC resolvers. This support can either be enabled by
118 configuring GCC with '--enable-gnu-indirect-function', or by
119 enabling it by default by setting 'default_gnu_indirect_function'
120 variable for a particular architecture in the GCC source file
123 Security related changes:
125 On ARM EABI (32-bit), generating a backtrace for execution contexts which
126 have been created with makecontext could fail to terminate due to a
127 missing .cantunwind annotation. This has been observed to lead to a hang
128 (denial of service) in some Go applications compiled with gccgo. Reported
129 by Andreas Schwab. (CVE-2016-6323)
131 The following bugs are resolved with this release:
133 [The release manager will add the list generated by
134 scripts/list-fixed-bugs.py just before the release.]
138 * The minimum Linux kernel version that this version of the GNU C Library
139 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
140 kernel version 2.6.32 or later suffices (on architectures that already
141 required kernel versions more recent than 3.2, those requirements remain
142 unchanged). Linux 3.2 or later kernel headers are required on all
145 * The pap_AN locale has been deleted. This has been deprecated for a long
146 time. It has been replaced by pap_AW & pap_CW, both of which have long
147 been included in previous releases.
149 * The readdir_r and readdir64_r functions have been deprecated. It is
150 recommended to use readdir and readdir64 instead.
152 * The type “union wait” has been removed. It was deprecated in the early
153 1990s and never part of POSIX. Application code should use the int type
154 instead of “union wait”.
156 * A new NSS action is added to facilitate large distributed system
157 administration. The action, MERGE, allows remote user stores like LDAP
158 to be merged into local user stores like /etc/groups in order to provide
159 easy to use, updated, and managed sets of merged credentials. The new
160 action can be used by configuring it in /etc/nsswitch.conf:
161 group: files [SUCCESS=merge] nis
162 Implemented by Stephen Gallagher (Red Hat).
164 * The deprecated __malloc_initialize_hook variable has been removed from the
167 * The long unused localedef --old-style option has been removed. It hasn't
168 done anything in over 16 years. Scripts using this option can safely
171 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
172 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
173 return the next representable value in the direction of positive infinity
174 and the nextdown functions return the next representable value in the
175 direction of negative infinity. These are currently enabled as GNU
178 Security related changes:
180 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
181 could result in a stack overflow when getnetbyname was called with an
182 overly long name. (CVE-2016-3075)
184 * Previously, getaddrinfo copied large amounts of address data to the stack,
185 even after the fix for CVE-2013-4458 has been applied, potentially
186 resulting in a stack overflow. getaddrinfo now uses a heap allocation
187 instead. Reported by Michael Petlan. (CVE-2016-3706)
189 * The glob function suffered from a stack-based buffer overflow when it was
190 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
191 Reported by Alexander Cherepanov. (CVE-2016-1234)
193 * The Sun RPC UDP client could exhaust all available stack space when
194 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
195 alloca plugin for GCC. (CVE-2016-4429)
197 * The IPv6 name server management code in libresolv could result in a memory
198 leak for each thread which is created, performs a failing naming lookup,
199 and exits. Over time, this could result in a denial of service due to
200 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
202 The following bugs are resolved with this release:
204 [1170] localedata: ne_NP: update Nepali locale definition file
205 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
207 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
208 [6796] math: fdim() does not set errno on overflow
209 [10354] libc: posix_spawn should use vfork() in more cases than presently
210 [11213] localedata: localedata: add copyright disclaimer to locale files
211 [12143] localedata: chr_US: new Cherokee locale
212 [12450] localedata: sgs_LT: new locale
213 [12676] localedata: ln_CD: new locale
214 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
216 [13304] math: fma, fmaf, fmal produce wrong results
217 [14259] build: --localedir arg to configure is ignored
218 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
219 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
220 [14934] localedata: es_CL: wrong first weekday chilean locale
221 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
223 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
225 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
226 [15368] nptl: raise() is not async-signal-safe
227 [15479] math: ceil, floor, round and trunc raise inexact exception
228 [15578] localedata: kk_KZ: various updates
229 [16003] localedata: pap_AN: punt old locale
230 [16137] localedata: iw_IL: punt old locale
231 [16190] localedata: eo: new esperanto locale
232 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
233 [16742] malloc: race condition: pthread_atfork() called before first
234 malloc() results in unexpected locking behaviour/deadlocks
235 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
237 [16983] localedata: postal_fmt does not allow %l and %n modifiers
238 [17565] localedata: pt_PT: wrong (work-)week start
239 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
240 [17950] build: Build fails with -msse
241 [18205] localedata: be_BY*: wrong first_weekday and first_workday
242 [18433] libc: posix_spawn does not return correctly upon failure to
244 [18453] localedata: charmaps/IBM875: incorrect codes
245 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
247 [18896] localedata: he_IL: improvements for currency
248 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
250 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
252 [19056] libc: Deprecate readdir_r
253 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
255 [19198] localedata: nl_NL: small improvements for Dutch locales
256 [19257] network: Per-thread memory leak in __res_vinit with IPv6
257 nameservers (CVE-2016-5417)
258 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
260 [19400] locale: Language missing in "iso-639.def", trivial fix in
262 [19431] malloc: Deadlock between fflush, getdelim, and fork
263 [19505] libc: Incorrect file descriptor validity checks in
264 posix_spawn_file_actions_add{open,close,dup2}
265 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
267 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
268 `intl/{gettextP,loadinfo}.h'
269 [19534] libc: execle, execlp may use malloc
270 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
271 [19573] network: res_nclose and __res_maybe_init disagree about name
272 server initialization, breaking Hesiod
273 [19575] localedata: Status of GB18030 tables
274 [19581] localedata: sr_* date_fmt string contains additional newline
275 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
277 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
278 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
279 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
280 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
282 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
284 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
286 [19610] dynamic-link: ldconfig -X removes stale symbolic links
287 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
288 [19633] locale: strfmon_l applies global locale to number formatting
289 [19642] network: Memory leak in getnameinfo
290 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
291 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
293 [19654] math: [x86_64] Need testcase for BZ #19590 fix
294 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
296 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
297 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
299 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
301 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
303 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
304 pointers and lengths in error-case.
305 [19727] locale: Converting from/to UTF-xx with iconv() does not always
306 report errors on UTF-16 surrogates values.
307 [19755] nscd: nscd assertion failure in gc
308 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
309 [19759] libc: mempcpy shouldn't be inlined
310 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
311 [19765] libc: s390 needs an optimized mempcpy
312 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
313 NAME_MAX limit assumption (CVE-2016-1234)
314 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
315 [19787] network: Missing and incorrect truncation checks in getnameinfo
316 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
318 [19791] network: Assertion failure in res_query.c with un-connectable name
320 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
321 [19822] math: libm.so install clobbers old version
322 [19825] network: resolv: send_vc can return uninitialized data in second
323 response to getaddrinfo
324 [19830] network: nss_dns: should check RDATA length against buffer length
325 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
326 confronted with A/AAAA records of invalid size
327 [19837] nss: nss_db: No retries for some long lines with a larger buffer
328 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
329 [19853] stdio: Printing IBM long double in decimal with high precision is
331 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
332 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
333 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
335 [19865] network: Assertion failure or memory leak in
336 _nss_dns_getcanonname_r
337 [19868] network: nss_dns: netent code does not skip over non-PTR records
338 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
340 [19881] string: Improve x86-64 memset
341 [19907] string: Incorrect memcpy tests
342 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
344 [19925] libc: termios.h XCASE namespace
345 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
346 [19929] libc: limits.h NL_NMAX namespace
347 [19931] stdio: Memory leak in vfprintf
348 [19957] libc: clone(CLONE_VM) access invalid parent memory
349 [19963] localedata: en_IL: New locale
350 [19989] stdio: stdio.h cuserid namespace
351 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
353 [19996] locale: langinfo.h nl_langinfo_l namespace
354 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
355 [20010] network: getaddrinfo: Stack overflow in hostent translation
357 [20012] stdio: libio: fmemopen append mode failure
358 [20014] stdio: stdio.h namespace for pre-threads POSIX
359 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
360 [20023] libc: fcntl.h timespec namespace
361 [20024] math: [x86_64] vectorized sincos trashes the stack
362 [20031] network: nss_hesiod: Heap overflow in get_txt_records
363 [20041] time: sys/time.h timespec namespace
364 [20043] libc: unistd.h missing cuserid for UNIX98 and before
365 [20044] libc: unistd.h missing pthread_atfork for UNIX98
366 [20051] libc: ttyslot in wrong header under wrong conditions
367 [20054] libc: gethostname not declared for XPG4
368 [20055] libc: termios.h missing tcgetsid for XPG4
369 [20072] dynamic-link: x86 init_cpu_features is called twice in static
371 [20073] libc: sys/stat.h fchmod namespace
372 [20074] libc: stdlib.h rand_r namespace
373 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
374 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
376 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
377 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
379 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
380 [20119] libc: Wrong mask for processors level type from CPUID
381 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
382 AS not supporting AVX512
383 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
385 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
386 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
388 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
389 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
390 [20178] libc: posix_spawn{p} should not call exit
391 [20191] stdio: libio: vtables hardening
392 [20195] string: FMA4 detection requires CPUID execution with register
394 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
395 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
397 [20212] math: acos (sNaN) returns sNaN
398 [20213] math: asin (sNaN) returns sNaN
399 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
400 [20218] math: [i386] asinhl (sNaN) returns sNaN
401 [20219] math: [i386] atanhl (sNaN) returns sNaN
402 [20222] stdio: fopencookie: Mangle function pointers
403 [20224] math: [i386] cbrtl (sNaN) returns sNaN
404 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
405 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
407 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
408 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
409 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
410 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
411 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
412 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
413 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
414 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
415 [20240] math: modf (sNaN) returns sNaN
416 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
417 [20250] math: frexp (sNaN) returns sNaN
418 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
419 [20255] math: [i386] fdim, fdimf return with excess range and precision /
421 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
422 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
423 subscript is below array bounds [-Werror=array-bounds]
424 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
425 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
427 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
428 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
430 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
432 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
433 [20316] localedata: id_ID: Februari instead of Pebruari
434 [20327] string: POWER8 strcasecmp returns incorrect result
435 [20347] math: Failure: Test: j0_downward (0xap+0)
436 [20348] libc: FAIL: misc/tst-preadvwritev64
437 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
438 [20350] libc: There is no test for p{read,write}64
439 [20357] math: Incorrect cos result for 1.5174239687223976
440 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
444 * Unicode 8.0.0 Support: Character encoding, character type info, and
445 transliteration tables are all updated to Unicode 8.0.0, using new
446 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
447 These updates cause user visible changes, such as the fixes for bugs
448 89, 16061, and 18568.
450 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
451 kernel-internal CPU set size. This means that requests that change the
452 CPU affinity which failed before (for example, an all-ones CPU mask) will
453 now succeed. Applications that need to determine the effective CPU
454 affinities need to call sched_getaffinity or pthread_getaffinity_np after
455 setting it because the kernel can adjust it (and the previous size check
456 would not detect this in the majority of cases).
458 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
459 the following new symbols are used: fts64_children, fts64_close,
460 fts64_open, fts64_read and fts64_set.
462 * getaddrinfo now detects certain invalid responses on an internal netlink
463 socket. If such responses are received, an affected process will
464 terminate with an error message of "Unexpected error <number> on netlink
465 descriptor <number>" or "Unexpected netlink response of size <number> on
466 descriptor <number>". The most likely cause for these errors is a
467 multi-threaded application which erroneously closes and reuses the netlink
468 file descriptor while it is used by getaddrinfo.
470 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
471 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
472 unnecessary serialization of memory allocation requests across threads.
473 The defect is now corrected. Users should see a substantial increase in
474 the concurent throughput of allocation requests for applications which
475 trigger this bug. Affected applications typically create and
476 destroy threads frequently. (Bug 19048 was reported and analyzed by
479 * There is now a --disable-timezone-tools configure option for disabling the
480 building and installing of the timezone related utilities (zic, zdump, and
481 tzselect). This is useful for people who build the timezone data and code
482 independent of the GNU C Library.
484 * The obsolete header <regexp.h> has been removed. Programs that require
485 this header must be updated to use <regex.h> instead.
487 * The obsolete functions bdflush, create_module, get_kernel_syms,
488 query_module and uselib are no longer available to newly linked binaries;
489 the header <sys/kdaemon.h> has been removed. These functions and header
490 were specific to systems using the Linux kernel and could not usefully be
491 used with the GNU C Library on systems with version 2.6 or later of the
494 * Optimized string, wcsmbs and memory functions for IBM z13.
495 Implemented by Stefan Liebler.
497 * Newly linked programs that define a variable called signgam will no longer
498 have it set by the lgamma, lgammaf and lgammal functions. Programs that
499 require signgam to be set by those functions must ensure that they use the
500 variable provided by the GNU C Library and declared in <math.h>, without
501 defining their own copy.
503 * The minimum GCC version that can be used to build this version of the GNU
504 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
505 still be used to compile programs using the GNU C Library.
507 Security related changes:
509 * An out-of-bounds value in a broken-out struct tm argument to strftime no
510 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
512 * The LD_POINTER_GUARD environment variable can no longer be used to disable
513 the pointer guard feature. It is always enabled. Previously,
514 LD_POINTER_GUARD could be used to disable security hardening in binaries
515 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
518 * An integer overflow in hcreate and hcreate_r could lead to an
519 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
521 * The catopen function no longer has unbounded stack usage. Reported by
524 * The nan, nanf and nanl functions no longer have unbounded stack usage
525 depending on the length of the string passed as an argument to the
526 functions. Reported by Joseph Myers. (CVE-2014-9761)
528 * A stack-based buffer overflow was found in libresolv when invoked from
529 libnss_dns, allowing specially crafted DNS responses to seize control
530 of execution flow in the DNS client. The buffer overflow occurs in
531 the functions send_dg (send datagram) and send_vc (send TCP) for the
532 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
533 family. The use of AF_UNSPEC triggers the low-level resolver code to
534 send out two parallel queries for A and AAAA. A mismanagement of the
535 buffers used for those queries could result in the response of a query
536 writing beyond the alloca allocated buffer created by
537 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
538 the overflow. Thanks to the Google Security Team and Red Hat for
539 reporting the security impact of this issue, and Robert Holiday of
540 Ciena for reporting the related bug 18665. (CVE-2015-7547)
542 The following bugs are resolved with this release:
544 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
545 [887] math: Math library function "logb" and "nextafter" inconsistent
546 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
547 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
548 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
549 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
551 [4404] localedata: German translation of "Alarm clock" is misleading
552 [6799] math: nextafter() and nexttoward() doen't set errno on
553 overflow/underflow errors
554 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
556 [10432] nis: _nss_nis_setnetgrent assertion failure
557 [11460] libc: fts has no LFS support
558 [12926] network: getaddrinfo()/make_request() may spin forever
559 [13065] nptl: Race condition in pthread barriers
560 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
561 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
563 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
564 [14912] libc: Rename non-installed bits/*.h headers
565 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
566 [15367] math: Let gcc use __builtin_isinf
567 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
568 [15421] math: lgamma wrongly sets signgam for ISO C
569 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
570 FE_INVALID with argument out of range
571 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
573 [15786] dynamic-link: ifunc resolver functions can smash function
575 [15918] math: Unnecessary check for equality in hypotf()
576 [16061] localedata: Review / update transliteration data
577 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
579 [16141] time: strptime %z offset restriction
580 [16171] math: drem should be alias of remainder
581 [16296] math: fegetround is pure?
582 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
583 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
585 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
586 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
588 [16422] math: [powerpc] math-float, math-double failing llrint tests with
589 "Exception "Inexact" set" on ppc32
590 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
591 [16517] math: Missing underflow exception from tanf/tan/tanl
592 [16519] math: Missing underflow exception from sinhf
593 [16520] math: Missing underflow exception from tanhf
594 [16521] math: Missing underflow exception from exp2
595 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
597 [16734] stdio: fopen calls mmap to allocate its buffer
598 [16961] math: nan function incorrect handling of bad sequences
599 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
600 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
601 [16985] locale: localedef: confusing error message when opening output
603 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
604 [17197] locale: Redundant shift character in iconv conversion output at
606 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
607 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
608 [17250] dynamic-link: static linking breaks nss loading
609 (getaddrinfo/getpwnam/etc...)
610 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
612 [17441] math: isnan() should use __builtin_isnan() in GCC
613 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
614 (related to lock elision)
615 [17787] manual: Exponent on page 324 of the PDF ends prematurely
616 [17886] time: strptime should be able to parse "Z" as a timezone with %z
617 [17887] time: strptime should be able to parse "+01:00" style timezones
618 [17905] libc: catopen() Multiple unbounded stack allocations
620 [18084] libc: backtrace (..., 0) dumps core on x86
621 [18086] libc: nice() sets errno to 0 on success
622 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
623 is too large (CVE-2015-8778)
624 [18251] dynamic-link: SONAME missing when audit modules provides path
625 [18265] libc: add attributes for wchar string and memory functions
626 [18370] math: csqrt missing underflows
627 [18421] libc: [hppa] read-only segment has dynamic relocations
628 [18472] libc: Obsolete syscall wrappers should be compat symbols
629 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
630 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
631 [18525] localedata: Remove locale timezone information
632 [18560] libc: [powerpc] spurious bits/ipc.h definitions
633 [18568] localedata: Update locale data to Unicode 8.0
634 [18589] locale: sort-test.sh fails at random
635 [18595] math: ctan, ctanh missing underflows
636 [18604] libc: assert macro-expands its argument
637 [18610] math: S390: fetestexcept() reports any exception if DXC-code
638 contains a vector instruction exception.
639 [18611] math: j1, jn missing errno setting on underflow
640 [18618] localedata: sync Chechen locale definitions with other *_RU
642 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
643 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
644 [18665] network: In send_dg, the recvfrom function is NOT always using the
645 buffer size of a newly created buffer (CVE-2015-7547)
646 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
648 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
650 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
651 [18699] math: tilegx cproj() for various complex infinities does not yield
653 [18724] libc: Harden put*ent functions against data injection
654 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
655 [18755] build: build errors with -DNDEBUG
656 [18757] stdio: fmemopen fails to set errno on failure
657 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
659 [18781] libc: openat64 lacks O_LARGEFILE
660 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
661 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
662 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
663 [18790] math: [ldbl-128ibm] tanhl inaccurate
664 [18795] libc: stpncpy fortification misses buffer lengths that are
666 [18796] build: build fails for --disable-mathvec
667 [18803] math: hypot missing underflows
668 [18820] stdio: fmemopen may leak memory on failure
669 [18823] math: csqrt spurious underflows
670 [18824] math: fma spurious underflows
671 [18825] math: pow missing underflows
672 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
673 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
674 [18870] build: sem_open.c fails to compile with missing symbol
676 [18872] stdio: Fix memory leak in printf_positional
677 [18873] libc: posix_fallocate overflow check ineffective
678 [18875] math: Excess precision leads incorrect libm
679 [18877] libc: arm: mmap offset regression
680 [18887] libc: memory corruption when using getmntent on blank lines
681 [18918] localedata: hu_HU: change time to HH:MM:SS format
682 [18921] libc: Regression: extraneous stat() and fstat() performed by
684 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
685 binaries (CVE-2015-8777)
686 [18951] math: tgamma missing underflows
687 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
689 [18953] localedata: lt_LT: change currency symbol to the euro
690 [18956] math: powf inaccuracy
691 [18961] math: [i386] exp missing underflows
692 [18966] math: [i386] exp10 missing underflows
693 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
694 [18969] build: multiple string test failures due to missing locale
696 [18970] libc: Reference of pthread_setcancelstate in libc.a
697 [18977] math: float / long double Bessel functions not in XSI POSIX
698 [18980] math: i386 libm functions return with excess range and precision
699 [18981] math: i386 scalb*, ldexp return with excess range and precision
700 [18982] stdio: va_list and vprintf
701 [18985] time: Passing out of range data to strftime() causes a segfault
703 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
704 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
705 [19012] locale: iconv_open leaks memory on error path
706 [19016] math: clog, clog10 inaccuracy
707 [19018] nptl: Mangle function pointers in tls_dtor_list
708 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
709 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
710 [19048] malloc: malloc: arena free list can become cyclic, increasing
712 [19049] math: [powerpc] erfc incorrect zero sign
713 [19050] math: [powerpc] log* incorrect zero sign
714 [19058] math: [x86_64] Link fail with -fopenmp and -flto
715 [19059] math: nexttoward overflow incorrect in non-default rounding modes
716 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
717 [19074] network: Data race in _res_hconf_reorder_addrs
718 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
719 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
720 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
722 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
724 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
725 [19086] manual: posix_fallocate64 documented argument order is wrong.
726 [19088] math: lround, llround missing exceptions close to overflow
728 [19094] math: lrint, llrint missing exceptions close to overflow threshold
729 [19095] math: dbl-64 lrint incorrect for 64-bit long
730 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
731 [19124] dynamic-link: ld.so failed to build with older assmebler
732 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
733 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
734 [19134] math: [powerpc32] lround, lroundf spurious exceptions
735 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
736 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
737 pthread_setaffinity_np
738 [19156] math: [ldbl-128] j0l spurious underflows
739 [19164] nptl: tst-getcpu fails with many possible CPUs
740 [19168] math: math/test-ildoubl and math/test-ldouble failure
741 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
742 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
744 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
745 (FE_NOMASK_ENV) do not clear SSE exceptions
746 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
747 _int_new_arena/reused_arena
748 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
749 [19201] math: dbl-64 remainder incorrect sign of zero result
750 [19205] math: bits/math-finite.h conditions do not match math.h and
752 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
753 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
754 for C99-based standards
755 [19212] libc: features.h not -Wundef clean
756 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
758 [19214] libc: Family and model identification for AMD CPU's are incorrect.
759 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
760 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
762 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
764 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
766 [19242] libc: strtol incorrect in Turkish locales
767 [19243] malloc: reused_arena can pick an arena on the free list, leading
768 to an assertion failure and reference count corruption
769 [19253] time: tzset() ineffective when temporary TZ did not include DST
771 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
772 [19270] math: [hppa] Shared libm missing __isnanl
773 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
774 MAP_HUGETLB and MAP_STACK defines
775 [19313] nptl: Wrong __cpu_mask for x32
776 [19347] libc: grantpt: try to force a specific gid even without pt_chown
777 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
778 [19350] math: [ldbl-128ibm] sinhl spurious overflows
779 [19351] math: [ldbl-128ibm] logl inaccurate near 1
780 [19363] time: x32: times() return value wrongly truncates/sign extends
782 [19367] dynamic-link: Improve branch prediction on Silvermont
783 [19369] network: Default domain name not reset by res_ninit when "search"
784 / "domain" entry is removed from resolv.conf
785 [19375] math: powerpc: incorrect results for POWER7 logb with negative
787 [19385] localedata: bg_BG: time separator should be colon, not comma
788 [19408] libc: linux personality syscall wrapper may erroneously return an
789 error on 32-bit architectures
790 [19415] libc: dladdr returns wrong names on hppa
791 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
792 IBM905, IBM907, and IBM909
793 [19439] math: Unix98 isinf and isnan functions conflict with C++11
794 [19443] build: build failures with -DDEBUG
795 [19451] build: Make check fails on test-double-vlen2
796 [19462] libc: Glibc failed to build with -Os
797 [19465] math: Wrong code with -Os
798 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
800 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
802 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
803 [19486] math: S390: Math tests fail with "Exception Inexact set".
804 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
805 [19550] libc: [mips] mmap negative offset handling inconsistent with other
807 [19590] math: Fail to build shared objects that use libmvec.so functions.
811 * The following bugs are resolved with this release:
813 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
814 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
815 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
816 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
817 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
818 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
819 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
820 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
821 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
822 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
823 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
824 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
825 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
826 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
827 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
828 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
829 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
830 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
831 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
832 18657, 18676, 18694, 18696, 18887.
834 * Cache information can be queried via sysconf() function on s390 e.g. with
835 _SC_LEVEL1_ICACHE_SIZE as argument.
837 * A buffer overflow in gethostbyname_r and related functions performing DNS
838 requests has been fixed. If the NSS functions were called with a
839 misaligned buffer, the buffer length change due to pointer alignment was
840 not taken into account. This could result in application crashes or,
841 potentially arbitrary code execution, using crafted, but syntactically
842 valid DNS responses. (CVE-2015-1781)
844 * The time zone file parser has been made more robust against crafted time
845 zone files, avoiding heap buffer overflows related to the processing of
846 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
847 large time zone data files. Overly long time zone specifiers in the TZ
848 variable no longer result in stack overflows and crashes.
850 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
851 for LD and GD on x86 and x86-64, has been implemented. You will need
852 binutils-2.24 or later to enable this optimization.
854 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
855 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
856 Hat). These updates cause user visible changes, such as the fix for bug
859 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
860 and getXXbyYY NSS calls for the same database, causing a denial-of-service
861 condition in some applications.
863 * Added vector math library named libmvec with the following vectorized x86_64
864 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
866 The library can be disabled with --disable-mathvec. Use of the functions is
867 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
868 Shared library libmvec.so is linked in as needed when using -lm (no need to
869 specify -lmvec explicitly for not static builds).
870 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
872 * A new fmemopen implementation has been added with the goal of POSIX
873 compliance. The new implementation fixes the following long-standing
874 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
875 old implementation is still present for use be by existing binaries.
877 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
878 releases. It has been fixed to match 2.19 and older, but binaries built
879 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
881 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
882 Contributed by Roland McGrath (Google).
884 * The header <regexp.h> is deprecated, and will be removed in a future
885 release. Use of this header will trigger a deprecation warning.
886 Application developers should update their code to use <regex.h> instead.
888 This header was formerly part of SUS, but was deprecated in 1994 and
889 removed from the standard in 2001. Also, the glibc implementation
890 leaks memory. See BZ#18681 for more details.
894 * The following bugs are resolved with this release:
896 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
897 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
898 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
899 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
900 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
901 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
902 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
903 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
904 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
905 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
908 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
909 too little memory for the to-be-scanned arguments and overflow the
910 allocated buffer. The implementation now correctly computes the required
911 buffer size when using malloc, and switches to malloc from alloca as
914 * A new semaphore algorithm has been implemented in generic C code for all
915 machines. Previous custom assembly implementations of semaphore were
916 difficult to reason about or ensure that they were safe. The new version
917 of semaphore supports machines with 64-bit or 32-bit atomic operations.
918 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
919 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
921 * Port to Altera Nios II has been contributed by Mentor Graphics.
923 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
924 implementations for powerpc64/powerpc64le.
925 Implemented by Adhemerval Zanella (IBM).
927 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
928 and powerpc64le. This may improve lock scaling of existing programs on
929 HTM capable systems. The lock elision code is only enabled with
930 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
931 powerpc will issue a transaction abort on every syscall to avoid side
932 effects being visible outside transactions.
934 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
935 AArch64. Contributed by ARM Ltd.
937 * i386 memcpy functions optimized with SSE2 unaligned load/store.
939 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
940 under certain input conditions resulting in the execution of a shell for
941 command substitution when the application did not request it. The
942 implementation now checks WRDE_NOCMD immediately before executing the
943 shell and returns the error WRDE_CMDSUB as expected.
945 * CVE-2012-3406 printf-style functions could run into a stack overflow when
946 processing format strings with a large number of format specifiers.
948 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
949 infinite loop if the DNS response contained a PTR record of an unexpected
952 * The minimum GCC version that can be used to build this version of the GNU
953 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
954 still be used to compile programs using the GNU C Library.
956 * The GNU C Library is now built with -Werror by default. This can be
957 disabled by configuring with --disable-werror.
959 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
961 * The obsolete sigvec function has been removed. This was the original
962 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
963 programs have been using instead for about 25 years. Of course, ABI
964 compatibility for old binaries using sigvec remains intact.
966 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
967 with newer versions of bison.
969 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
970 The original MIPS o32 hard-float ABI requires an FPU where double-precision
971 registers overlay two consecutive single-precision registers. MIPS32R2
972 introduced a new FPU mode (FR=1) where double-precision registers extend the
973 corresponding single-precision registers which is incompatible with the
974 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
975 require the use of FR=1 making a transition necessary. New o32 ABI
976 extensions enable users to migrate over time from the original o32 ABI
977 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
978 tracks the ABI of any loaded object and verifies that new objects are
979 compatible. Mode transitions will also be requested as required and
980 unsupportable objects will be rejected. The ABI checks include both soft and
981 hard float ABIs for o32, n32 and n64.
983 GCC 5 with GNU binutils 2.25 onwards:
984 It is strongly recommended that all o32 system libraries are built using the
985 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
986 with the original and all new o32 ABI extensions. Configure a MIPS GCC
987 compiler using --with-fp-32=xx to set this by default.
991 * The following bugs are resolved with this release:
993 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
994 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
995 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
996 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
997 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
998 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
999 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1000 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1001 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1002 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1003 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1004 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1005 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1006 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1007 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1009 * Reverted change of ABI data structures for s390 and s390x:
1010 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1011 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1012 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1013 are preserved pointing straight to the same implementation as the old ones.
1014 Given that, new callers will simply provide a too-big buffer to these
1015 functions. Any applications/libraries out there that embed jmp_buf or
1016 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1017 against 2.19 headers will have to rebuilt again. This is necessary in any
1018 case to revert the breakage in their ABI caused by the glibc change.
1020 * Support for file description locks is added to systems running the
1021 Linux kernel. The standard file locking interfaces are extended to
1022 operate on file descriptions, not file descriptors, via the use of
1023 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1024 are associated with an open file instead of a process.
1026 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1028 * The minimum Linux kernel version that this version of the GNU C Library
1029 can be used with is 2.6.32.
1031 * Running the testsuite no longer terminates as soon as a test fails.
1032 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1033 with PASS or FAIL lines for individual tests. A summary of the results is
1034 printed, including a list of failing lists, and "make check" exits with
1035 error status if there were any unexpected failures. "make check
1036 stop-on-test-failure=y" may be used to keep the old behavior.
1038 * The am33 port, which had not worked for several years, has been removed
1041 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1042 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1043 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1044 conflicted with POSIX (support for which was removed in 2.19), the
1045 interfaces those macros enabled remain available when compiling with
1046 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1047 test macros defined.
1049 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1051 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1052 This may improve lock scaling of existing programs on TX capable systems.
1053 The lock elision code is only built with --enable-lock-elision=yes and
1054 then requires a GCC version supporting the TX builtins. With lock elision
1055 default mutexes are elided via __builtin_tbegin, if the cpu supports
1056 transactions. By default lock elision is not enabled and the elision code
1059 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1060 copy the path argument. This allowed programs to cause posix_spawn to
1061 deference a dangling pointer, or use an unexpected pathname argument if
1062 the string was modified after the posix_spawn_file_actions_addopen
1065 * All supported architectures now use the main glibc sysdeps directory
1066 instead of some being in a separate "ports" directory (which was
1067 distributed separately before glibc 2.17).
1069 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1070 On configurations that support it (all Linux configurations), it's now
1071 used regardless of the --enable-add-ons switch to configure. It is no
1072 longer possible to build such configurations without pthreads support.
1074 * Locale names, including those obtained from environment variables (LANG
1075 and the LC_* variables), are more tightly checked for proper syntax.
1076 setlocale will now fail (with EINVAL) for locale names that are overly
1077 long, contain slashes without starting with a slash, or contain ".." path
1078 components. (CVE-2014-0475) Previously, some valid locale names were
1079 silently replaced with the "C" locale when running in AT_SECURE mode
1080 (e.g., in a SUID program). This is no longer necessary because of the
1083 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1084 with application code using Intel MPX instructions. (With all previous
1085 versions, the MPX register state could be clobbered when making calls
1086 into or out of a shared library.) Note that while the new dynamic
1087 linker is compatible with all known x86 hardware whether or not it
1088 supports Intel MPX, some x86 instruction-set emulators might fail to
1089 handle the new instruction encodings. This is known to affect Valgrind
1090 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1091 release), and might affect other tools that do instruction emulation.
1093 * Support for loadable gconv transliteration modules has been removed.
1094 The support for transliteration modules has been non-functional for
1095 over a decade, and the removal is prompted by security defects. The
1096 normal gconv conversion modules are still supported. Transliteration
1097 with //TRANSLIT is still possible, and the //IGNORE specifier
1098 continues to be supported. (CVE-2014-5119)
1100 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1101 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1102 resulting a denial-of-service security vulnerability in applications which
1103 use functions related to iconv. (CVE-2014-6040)
1107 * The following bugs are resolved with this release:
1109 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1110 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1111 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1112 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1113 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1114 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1115 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1116 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1117 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1118 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1119 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1120 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1121 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1122 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1123 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1124 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1125 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1126 16431, 16453, 16474, 16506, 16510, 16529
1128 * Slovenian translations for glibc messages have been contributed by the
1129 Translation Project's Slovenian team of translators.
1131 * The public headers no longer use __unused nor __block. This change is to
1132 support compiling programs that are derived from BSD sources and use
1133 __unused internally, and to support compiling with Clang's -fblock
1134 extension which uses __block.
1136 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1137 large collation sequences to optimize multiple passes. This cache
1138 computation may overflow for large collation sequences and may cause a
1139 stack or buffer overflow. This is now fixed to use a slower algorithm
1140 which does not use a cache if there is an integer overflow.
1142 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1143 rules for large collation sequences to optimize multiple passes and falls
1144 back to alloca if malloc fails, resulting in a possible stack overflow.
1145 The implementation now falls back to an uncached collation sequence lookup
1148 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1149 initialized for static applications resulting in the security feature
1150 being disabled. The pointer guard is now correctly initialized to a
1151 random value for static applications. Existing static applications need
1152 to be recompiled to take advantage of the fix (bug 15754).
1154 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1155 to the d_name member of struct dirent, or omit the terminating NUL
1156 character. (Bugzilla #14699).
1158 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1159 aligned_alloc functions could allocate too few bytes or corrupt the
1160 heap when passed very large allocation size values (Bugzilla #15855,
1163 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1164 for AF_INET6 has been fixed (Bugzilla #16072).
1166 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1167 pap_CW, quz_PE, the_NP.
1169 * Substantially revised locales: gd_GB, ht_HT
1171 * The LC_ADDRESS field was updated to support country_car for almost all
1174 * ISO 1427 definitions were updated.
1176 * ISO 3166 definitions were updated.
1178 * The localedef utility now supports --big-endian and --little-endian
1179 command-line options to generate locales for a different system from that
1180 for which the C library was built.
1182 * Binary locale files now only depend on the endianness of the system for
1183 which they are generated and not on other properties of that system. As a
1184 consequence, binary files generated with new localedef may be incompatible
1185 with old versions of the GNU C Library, and binary files generated with
1186 old localedef may be incompatible with this version of the GNU C Library,
1187 in the following circumstances:
1189 + Locale files may be incompatible on m68k systems.
1191 + Locale archive files (but not separate files for individual locales) may
1192 be incompatible on systems where plain "char" is signed.
1194 * The configure option --disable-versioning has been removed. Builds with
1195 --disable-versioning had not worked for several years.
1197 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1198 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1200 * SystemTap probes for malloc have been introduced.
1202 * SystemTap probes for slow multiple precision fallback paths of
1203 transcendental functions have been introduced.
1205 * Support for powerpc64le has been added.
1207 * The soft-float powerpc port now supports e500 processors.
1209 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1211 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1212 set of header declarations that are enabled by default, even when other
1213 feature test macros or compiler options such as -std=c99 would otherwise
1214 disable some of those declarations.
1216 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1217 conflict with POSIX. The libbsd-compat library (which was a dummy library
1218 that did nothing) has also been removed.
1220 * Preliminary documentation about Multi-Thread, Async-Signal and
1221 Async-Cancel Safety has been added.
1223 * Change of ABI data structures for s390 and s390x:
1224 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1225 allow for future hardware extensions. All library functions that accept or
1226 return these structures were versioned in order to provide backwards
1227 compatibility with existing code. However, not all cases can be handled
1228 with interface versioning. If an application embeds either structure into
1229 another structure and that structure is passed to another compilation unit
1230 which expects the newer larger-sized object then any access to the new
1231 fields will result in undefined behaviour. Similarly any access to fields
1232 that were moved by the enlarging of the structures will cause undefined
1233 behaviour. To fix the undefined behaviour all objects that are part of the
1234 final in-memory image must agree on the size of structures, and this may
1235 require recompilation.
1239 * The following bugs are resolved with this release:
1241 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1242 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1243 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1244 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1245 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1246 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1247 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1248 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1249 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1250 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1251 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1252 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1253 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1256 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1257 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1258 Distributions can re-enable building and using pt_chown via the new configure
1259 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1260 considerable security risks and should only be used if the distribution
1261 understands and accepts the risks.
1263 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1266 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1267 fixed (Bugzilla #15330).
1269 * Add support for calling C++11 thread_local object destructors on thread
1270 and program exit. This needs compiler support for offloading C++11
1271 destructor calls to glibc.
1273 * Improved worst case performance of libm functions with double inputs and
1276 * Support for priority inherited mutexes in pthread condition variables on
1277 non-x86 architectures.
1279 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1281 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1283 * Optimized string functions for ARM. Implemented by Will Newton and
1286 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1288 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1291 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1292 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1294 * Added a benchmark framework to track performance of functions in glibc.
1296 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1297 It is based on draft TS 18661 and currently enabled as a GNU extension.
1299 * On Linux, the clock function now uses the clock_gettime system call
1300 for improved precision, rather than old times system call.
1302 * Added support for version-3 tz format files. This is needed when using
1303 the tz database release 2013e or later, and affects a few unusual cases --
1304 currently only TZ='America/Godthab' for time stamps after 2037.
1306 * Added new API functions pthread_getattr_default_np and
1307 pthread_setattr_default_np to get and set the default pthread
1308 attributes of a process.
1310 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1311 This may improve lock scaling of existing programs on TSX capable systems.
1312 When the --enable-lock-elision=yes parameter is specified at configure
1313 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1316 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1317 availability). Implemented by Ryan S. Arnold.
1319 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1323 * The following bugs are resolved with this release:
1325 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1326 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1327 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1328 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1329 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1330 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1331 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1332 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1333 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1334 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1335 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1336 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1337 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1338 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1339 14879, 14889, 14893, 14898, 14914.
1341 * Optimization of memcpy for MIPS.
1343 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1344 EMFILE has been fixed (Bugzilla #14889).
1346 * The add-on ports collection is now distributed in the "ports" subdirectory
1347 of the main GNU C Library distribution, rather than separately.
1349 * Port to ARM AArch64 contributed by Linaro.
1351 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1352 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1354 Implemented by Andreas Krebbel.
1356 * The new function secure_getenv allows secure access to the environment,
1357 returning NULL if running in a SUID/SGID process. This function replaces
1358 the internal function __secure_getenv.
1360 * SystemTap static probes have been added into the dynamic linker.
1361 Implemented by Gary Benson.
1363 * Optimizations of string functions strstr, strcasestr and memmem.
1364 Implemented by Maxim Kuvyrkov.
1366 * The minimum Linux kernel version that this version of the GNU C Library
1367 can be used with is 2.6.16.
1369 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1370 powerpc POWER7. Implemented by Will Schmidt.
1372 * New configure option --disable-nscd builds the C library such that it
1373 never attempts to contact the Name Service Caching Daemon (nscd).
1374 New configure option --disable-build-nscd avoids building nscd itself;
1375 this is the default if --disable-nscd is used.
1377 * Improved support for cross-compilation, including cross-testing and
1378 bootstrap builds without a previously built glibc.
1380 * Several testsuite tests are now able to test multiple IFUNC variants of an
1381 interface, rather than just testing the one that would be chooen by
1384 * New configure options --with-bugurl and --with-pkgversion, for
1385 distributors to use to embed their bug-reporting and package version
1386 information in --help and --version output.
1388 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1389 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1390 allows creation of chroots without the procfs mounted on /proc.
1392 * The `crypt' function now fails if passed salt bytes that violate the
1393 specification for those values. On Linux, the `crypt' function will
1394 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1395 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1396 when the mode is enabled.
1398 * The `clock_*' suite of functions (declared in <time.h>) is now available
1399 directly in the main C library. Previously it was necessary to link with
1400 -lrt to use these functions. This change has the effect that a
1401 single-threaded program that uses a function such as `clock_gettime' (and
1402 is not linked with -lrt) will no longer implicitly load the pthreads
1403 library at runtime and so will not suffer the overheads associated with
1404 multi-thread support in other code such as the C++ runtime library.
1406 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1411 * The following bugs are resolved with this release:
1413 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1414 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1415 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1416 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1417 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1418 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1419 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1420 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1421 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1422 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1423 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1424 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1425 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1426 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1427 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1428 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1429 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1430 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1431 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1432 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1433 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1434 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1437 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1438 configuring glibc with:
1439 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1440 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1441 Implemented by H.J. Lu.
1445 + define static_assert
1447 + do not declare gets
1449 + declare at_quick_exit and quick_exit also for ISO C11
1451 + aligned_alloc. NB: The code is deliberately allows the size parameter
1452 to not be a multiple of the alignment. This is a moronic requirement
1453 in the standard but it is only a requirement on the caller, not the
1456 + timespec_get added
1458 + uchar.h support added
1460 + CMPLX, CMPLXF, CMPLXL added
1462 Implemented by Ulrich Drepper.
1464 * Support for the IA-64 has been moved to ports.
1466 * Remove support for anything but ELF binary format
1468 * Checking versions of poll, ppoll added.
1469 Implemented by Ulrich Drepper.
1471 * More generic and 64-bit performance optimizations to math functions.
1472 Implemented by Ulrich Drepper.
1474 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1475 headers and functions available at compile time as they were before
1476 version 2.14. This option will be removed at some time in the future
1477 after the TI-RPC library becomes fully sufficient for the needs of
1478 existing applications.
1480 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1481 Note that glibc is not expected to work with any Linux kernel version
1484 * New header <sys/auxv.h> and function getauxval allowing easy access to
1485 the AT_* key-value pairs passed from the Linux kernel. The header also
1486 defines the HWCAP_* bits associated with the AT_HWCAP key.
1488 * New locales: mag_IN
1490 * New configure option --enable-systemtap builds SystemTap static probes
1491 into libc for setjmp and longjmp and into libpthread for various operations.
1492 So far the setjmp/longjmp probes and some of the libpthread probes are
1493 provided only for i*86 and x86_64.
1494 Implemented by Roland McGrath and Rayson Ho.
1496 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1498 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1501 * More optimized functions for SPARC. Implemented by David S. Miller.
1503 * Improved support for cross-compilation, especially bootstrap builds
1504 without a previously built glibc.
1506 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1507 Chris Metcalf from Tilera.
1509 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1510 now supported for ARM processors.
1512 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1513 as the name of the dynamic linker, to distinguish it from the
1514 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1516 * Support for CRIS has been removed from ports.
1518 * A new class of installed header has been documented for low-level
1519 platform-specific functionality. PowerPC added the first instance with a
1520 function to provide time base register access. Contributed by Tulio
1521 Magno Quites Machado Filho.
1523 * ix86 configurations now install header files that are consistent with
1524 what x86-64 configurations install. These same header files can be used
1525 for -m32, -m64, or -mx32 builds.
1526 Contributed by H.J. Lu.
1528 * Math library bug fixes. A thorough audit of all open math library bugs was
1529 conducted by Joseph Myers. Significant progress was made on many math
1530 library bugs resulting in more accurate exceptions and function results.
1531 Many thanks to all those that contributed including Andreas Jaeger for his
1532 patch review and work on the x87 trigonometric instruction issues.
1534 * Timezone data is no longer installed. Timezone-related binaries and scripts
1535 will continue to be installed. Users should obtain their timezone data from
1536 their distribution provider or from the tzdata package at
1537 <ftp://munnari.oz.au/pub/>.
1541 * The following bugs are resolved with this release:
1543 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1544 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1545 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1546 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1547 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1548 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1549 13484, 13506, 13515, 13523, 13524, 13538, 13540
1551 * New program pldd to list loaded object of a process
1552 Implemented by Ulrich Drepper.
1554 * Add nss_db support back to glibc. No more dependency on Berkeley db
1555 and support for initgroups lookups.
1556 Implemented by Ulrich Drepper.
1558 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1559 Contributed by HJ Lu.
1561 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1562 Contributed by HJ Lu.
1564 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1565 on x86-32 and x86-64.
1566 Contributed by Liubov Dmitrieva.
1568 * Optimized strchr and strrchr for SSE on x86-32.
1569 Contributed by Liubov Dmitrieva.
1571 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1572 for x86-64 and x86-32.
1573 Contributed by Liubov Dmitrieva.
1575 * New interfaces: scandirat, scandirat64
1576 Implemented by Ulrich Drepper.
1578 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1579 Implemented by Ulrich Drepper.
1581 * nscd now also caches the netgroup database.
1582 Implemented by Ulrich Drepper.
1584 * Integrate libm with gcc's -ffinite-math-only option.
1585 Implemented by Ulrich Drepper.
1587 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1588 to math functions. Implemented by Ulrich Drepper.
1590 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1591 Implemented by Ulrich Drepper.
1593 * New Linux interfaces: process_vm_readv, process_vm_writev
1595 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1596 Implemented by Ulrich Drepper.
1598 * Optimized nearbyint and strcasecmp for PPC.
1599 Implemented by Adhemerval Zanella.
1601 * New locales: bho_IN, unm_US, es_CU, ta_LK
1605 * The following bugs are resolved with this release:
1607 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1608 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1609 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1610 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1611 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1612 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1613 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1614 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1615 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1616 12795, 12811, 12813, 12814, 12841
1618 * The RPC implementation in libc is obsoleted. Old programs keep working
1619 but new programs cannot be linked with the routines in libc anymore.
1620 Programs in need of RPC functionality must be linked against TI-RPC.
1621 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1623 Visible changes of this change include (obviously) the inability to link
1624 programs using RPC functions without referencing the TI-RPC library and the
1625 removal of the RPC headers from the glibc headers.
1626 Implemented by Ulrich Drepper.
1628 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1629 syncfs, setns, sendmmsg
1631 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1632 yue_HK, lij_IT, mhr_RU
1634 * New encodings: CP770, CP771, CP772, CP773, CP774
1636 * New program sotruss to trace calls through PLTs
1637 Implemented by Ulrich Drepper.
1639 * The malloc hook implementation is marked deprecated and will be removed
1640 from the default implementation in the next version. The design never
1641 worked ever since the introduction of threads. Even programs which do
1642 not create threads themselves can use multiple threads created internally.
1646 * The following bugs are resolved with this release:
1648 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1649 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1650 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1651 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1654 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1656 * POWER7 optimizations: memset, memcmp, strncmp
1658 * New optimized string functions for x86-64: strnlen (SSE2),
1659 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1660 Implemented by Ulrich Drepper.
1664 * The following bugs are resolved with this release:
1666 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1667 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1668 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1669 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1670 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1671 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1672 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1673 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1675 * New interfaces: pthread_getname_np, pthread_setname_np
1677 * New Linux interface: recvmmsg
1679 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1681 * The dynamic linker now recognizes supported ABI versions from the
1682 EI_ABIVERSION field in the ELF header.
1683 Implemented by Ulrich Drepper.
1685 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1686 will not be used to fill in password fields in the passwd.byname replies.
1687 Instead it is used to synthesize the shadow.byname table, should it be
1688 missing. This is a useful mode in some installations involving Solaris.
1689 Implemented by Ulrich Drepper.
1691 * New locales: kok_IN, sq_MK, cv_RU
1695 * The following bugs are resolved with this release:
1697 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1698 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1699 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1700 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1701 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1702 10789, 10817, 10823, 10840, 10847
1704 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1706 Implemented by Ulrich Drepper.
1708 * Checking version of longjmp added that fails if an uninitialized stack
1709 frame would be created. Implemented by Ulrich Drepper.
1711 * STT_GNU_IFUNC is now supported in static executables.
1712 Implemented by H.J. Lu.
1714 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1716 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1717 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1718 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1719 Contributed by H.J. Lu.
1721 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1722 Implemented by Ulrich Drepper.
1724 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1726 Contributed by H.J. Lu.
1728 * Support for fma instruction in AVX on x86-64.
1729 Implemented by H.J. Lu and Ulrich Drepper.
1731 * AVX support in x86-64 auditing support in ld.so.
1732 Implemented by H.J. Lu.
1734 * STB_GNU_UNIQUE support added.
1735 Implemented by Ulrich Drepper.
1737 * Implement second fallback mode for optimized DNS lookup for even more
1738 broken environments. If two requests from the same port are not
1739 handled correctly close the socket and open a new one before sending
1740 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1741 can be used to select this mode right away, instead of rediscovering the
1742 necessity is every process again.
1743 Implemented by Ulrich Drepper.
1745 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1746 Implemented by Adam Tkac.
1748 * Optimized iconv conversions for S390x.
1749 Implemented by Andreas Krebbel.
1751 * Using condvars with PI mutexes is now more efficient due to kernel
1752 support for requeueing to PI futexes. NPTL support added for x86-64.
1753 Implemented by Ulrich Drepper.
1755 * New locales: ps_AF, my_MM
1759 * The following bugs are resolved with this release:
1761 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1762 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1763 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1764 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1765 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1767 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1768 Implemented by Ulrich Drepper.
1770 * New Linux interfaces: accept4, fallocate, fallocate64.
1771 Implemented by Ulrich Drepper.
1773 * Correct declarations of string function when used in C++ code. This
1774 could lead to compile errors for invalid C++ code.
1776 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1779 * New POSIX 2008 interface: psiginfo
1780 Implemented by Ulrich Drepper.
1782 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1783 Implemented by Ulrich Drepper.
1785 * Support for selecting between multiple function definitions at runtime
1786 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1788 * The libcrypt library can now use the hash function implementations in
1789 NSS. Implemented by Ulrich Drepper.
1791 * The malloc implementation can be compiled to be less memory efficient
1792 but higher performing in multi-threaded programs.
1793 Implemented by Ulrich Drepper.
1795 * New locales: nan_TW@latin, ks_IN
1797 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1798 Implemented by Ulrich Drepper.
1800 * Extended printf hook support. It is possible to use user-defined types
1801 and extend existing format specifiers.
1802 Implemented by Ulrich Drepper.
1804 * Handling for group shadow files has been added.
1805 Implemented by Ulrich Drepper.
1807 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1808 servers (the case, e.g., for some people using the built-in DNS
1809 server in ADSL modems/routers). There is a once-per-process timeout
1810 in case of a broken server. To avoid it, users can run nscd or put
1811 'options single-request' in /etc/resolv.conf.
1812 Implemented by Ulrich Drepper.
1816 * The following bugs are resolved with this release:
1818 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1819 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1820 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1821 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1822 6968, 6974, 6980, 6995, 7008, 7009, 7029
1824 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1825 up at the same time. Implemented by Ulrich Drepper.
1827 * TLS descriptors for LD and GD on x86 and x86-64.
1828 Implemented by Alexandre Oliva.
1830 * getaddrinfo now handles DCCP and UDPlite.
1831 Implemented by Ulrich Drepper.
1833 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1834 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1835 Implemented by Ulrich Drepper.
1837 * New implementation of memmem, strstr, and strcasestr which is O(n).
1838 Implemented by Eric Blake.
1840 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1842 * Implement "e" option for popen to open file descriptor with the
1843 close-on-exec flag set. Implemented by Ulrich Drepper.
1845 * Implement "b" mode for fmemopen. In this mode writes writes don't
1846 implicitly add a NUL byte and seeks from the end of the buffer really
1847 use the buffer end, not the string length as the basis.
1848 Implemented by Ulrich Drepper.
1850 * Many functions, exported and internal, now atomically set the close-on-exec
1851 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1853 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1855 Implemented by Pravin Satpute.
1857 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1861 * The following bugs are resolved with this release:
1863 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1864 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1865 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1866 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1867 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1868 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1869 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1871 * New locales: bo_CN, bo_IN, shs_CA.
1873 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1875 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1876 Implemented by Pravin Satpute.
1878 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1880 * nscd caches now all timeouts for DNS entries
1881 Implemented by Ulrich Drepper.
1883 * nscd is more efficient and wakes up less often.
1884 Implemented by Ulrich Drepper.
1886 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1887 vdprintf, and obstack_vprintf.
1888 Implemented by Jakub Jelinek.
1890 * Faster memset for x86-64.
1891 Implemented by Harsha Jagasia and H.J. Lu.
1893 * Faster memcpy on x86.
1894 Implemented by Ulrich Drepper.
1896 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1897 Implemented by Ulrich Drepper.
1899 * Faster sqrt and sqrtf implemention for some PPC variants.
1900 Implemented by Steven Munroe.
1904 * The following bugs are resolved with this release:
1906 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1907 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1908 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1909 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1910 5071, 5103, 5104, 5112, 5113, 5184, 5186
1912 * More checking functions: fread, fread_unlocked, open*, mq_open.
1913 Implemented by Jakub Jelinek and Ulrich Drepper.
1915 * Extend fortification to C++. Implemented by Jakub Jelinek.
1917 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1918 by not recognizing 'a' as a modifier when those specs are requested.
1919 Implemented by Jakub Jelinek.
1921 * PPC optimizations to math and string functions.
1922 Implemented by Steven Munroe.
1924 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1925 options to be passed. Implemented by Ulrich Drepper.
1927 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1929 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1930 Implemented by Ulrich Drepper.
1932 * Handle private futexes in the NPTL implementation.
1933 Implemented by Jakub Jelinek and Ulrich Drepper.
1935 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1936 Implemented by Roland McGrath and Ulrich Drepper.
1938 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1940 * SHA-256 and SHA-512 based password encryption.
1941 Implemented by Ulrich Drepper.
1943 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1944 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1947 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1948 Implemented by Ulrich Drepper.
1952 * The following bugs are resolved with this release:
1954 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1955 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1956 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1957 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1958 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1959 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1960 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1963 * New Linux interfaces: epoll_pwait, sched_getcpu.
1965 * New generic interfaces: strerror_l.
1967 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1971 * The following bugs are resolved with this release:
1973 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1974 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1975 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1976 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1977 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1978 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1979 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1980 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1981 3225, 3251, 3252, 3253, 3273
1983 * For Linux, the sorting of addresses returned by getaddrinfo now also
1984 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1985 Implemented by Ulrich Drepper.
1987 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1988 Implemented by Ulrich Drepper.
1990 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1992 * New iconv module for MIK. Contributed by Alexander Shopov.
1994 * For sites with broken group and/or passwd database, the auto-propagate
1995 option of nscd can prevent creating ID lookup entries from the results
1996 of a name lookup and vice versa. This usually is no problem but some
1997 site might have problems with the default behavior.
1998 Implemented by Ulrich Drepper.
2000 * Iterating over entire database in NIS can be slow. With the
2001 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2002 to trade time for memory. The entire database will be read at once.
2003 Implemented by Ulrich Drepper.
2005 * The interfaces introduced in RFC 3542 have been implemented by
2008 * Support for the new ELF hash table format was added by Ulrich Drepper.
2010 * Support for priority inheritance mutexes added by Jakub Jelinek and
2013 * Support for priority protected mutexes added by Jakub Jelinek.
2015 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2016 or_IN, csb_PL, fy_NL, sr_ME.
2020 * More overflow detection functions.
2022 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2023 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2025 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2026 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2027 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2028 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2029 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2030 by Masahide Washizawa.
2032 * It is now possible to install audit libraries for the dynamic linker using
2033 LD_AUDIT. Implemented by Ulrich Drepper.
2035 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2036 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2037 For a libc and libpthread that works well on Linux 2.4 kernels, we
2038 recommend using the stable 2.3 branch.
2040 * The new function open_wmemstream acts like open_memstream,
2041 but uses a wchar_t wide character buffer.
2043 * The new function ppoll is an improved version of poll, similar to pselect.
2045 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2046 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2047 renameat, unlinkat, linkat, symlinkat, readlinkat.
2049 * New Linux kernel system calls: unshare,
2050 inotify_init, inotify_add_watch, inotify_rm_watch.
2052 * The euidaccess function is now also known by the alias eaccess,
2053 for compatibility with some other systems.
2055 * Timezone data updated to 2006b version.
2059 * The following bugs are resolved with this release:
2061 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2062 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2063 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2064 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2065 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2066 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2068 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2070 * As of this release, GCC 4 can be used to compile the C Library.
2072 * Timezone data updated to 2005m version.
2076 * The following bugs are resolved with this release:
2078 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2079 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2080 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2081 777, 787, 821, 822, 823, 825
2083 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2087 * Support for RFC 3678. Real implementations exist only for Linux so far.
2088 Implemented by Ulrich Drepper.
2090 * nscd can now cache entries persistently. Expiring entries are reloaded.
2091 For speedups the cache can be shared in memory with client processes.
2092 Implemented by Ulrich Drepper.
2094 * nscd can now perform SELinux checks.
2095 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2097 * getaddrinfo queries are now cached. Canonical name lookup is performed
2099 Implemented by Ulrich Drepper.
2101 * The nothrow function attribute is used when headers are used by gcc when
2102 compiling C code. This can avoid significant amounts of exception
2105 * The malloc functions perform more error checking and are stricter when
2106 it comes to reacting on errors. The default action is to terminate
2107 the process after showing an error message. Implemented by Ulrich Drepper.
2109 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2110 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2112 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2113 namespaces using the new function dlmopen(). This feature is of course,
2114 like most other dynamic loading functionality, not available in statically
2115 linked applications. Implemented by Ulrich Drepper.
2117 * Low-overhead boundary checking variants of string and some stdio functions
2118 were added. These are to be used in conjunction with a gcc patch by
2119 Jakub Jelinek which adds calls to these functions if possible.
2120 Implemented by Jakub Jelinek and Ulrich Drepper.
2122 * Old code for several operating systems and machine architectures that
2123 have not been in working condition in a long time have been removed from
2124 the main source tree maintained by the GNU C Library's maintainers.
2125 These files are now reside in the separate `ports' source module
2126 that is usable as an add-on when building the library.
2130 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2131 interrogate the dynamic linker, compatible with the Solaris interface.
2133 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2134 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2136 * getifaddrs now uses the netlink interface on Linux to get its information.
2137 Implemented by Thorsten Kukuk.
2139 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2140 Implemented by Ulrich Drepper.
2142 * support for non-executable stacks on x86 has been added. Changes mostly
2145 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2148 * getaddrinfo now performs destination address selection according to
2153 * Thread-safe interfaces for many functions that access locale data
2154 were added in version 2.3, but these features were omitted from NEWS.
2155 Many functions have variants with an `_l' suffix that take a `locale_t'
2156 object as a parameter rather than consulting the current locale.
2157 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2158 create and maintain `locale_t' objects. Additionally, the new function
2159 `uselocale' sets "the current locale" (as used by functions not so
2160 parameterized) set for an individual thread. These features were added
2161 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2163 * The functions getresuid, getresgid, setresuid, and setresgid, which
2164 have long been available on Linux, are now declared in <unistd.h>
2165 and are now also available on the Hurd.
2167 * ELF thread-local storage support (TLS) now works on x86-64.
2169 * The new dynamic string token $LIB is expanded in shared library names.
2170 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2172 * Aldy Hernandez contributed complete software floating point support for
2173 PowerPC machines with no FPU.
2175 * fexecve is implemented on Linux.
2177 * The `btowc' function should work at least twice as fast due to
2178 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2180 * With approriate thread add-ons cancelable functions are now implemented
2181 in libc.so as well. No need to call the function in libpthread. This
2182 change allowed to finally disable the incorrect and expensive handling
2183 of weak definition in ld.so.
2185 * Yet more PLT entries in libc.so have been removed. We finally arrived
2186 at the bare minimum. Startup times improved appropriately.
2188 * Support for the new Linux/x86 system call interface was added. The
2189 AT_SYSINFO auxiliary vector entry is recognized and handled.
2193 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2196 * iconv (the program and the interface) now accepts empty names (excluding
2197 options like //TRANSLIT) to mean "use charset of current locale".
2199 * localedef can now transliterate characters in strings which are not in
2200 the provided charmap. The information from the input locale is used.
2202 * Prelinking support was added for ELF targets. This requires additional
2203 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2205 * Read-only stdio streams now use mmap to speed up operation by eliminating
2206 copying and buffer underflows. To use add 'm' to the mode string of
2207 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2209 * The malloc functions were completely rewritten by Wolfram Gloger based
2210 on Doug Lea's malloc-2.7.0.c.
2212 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2213 implementation of regex.
2215 * Bruno Haible upgraded the iconv and locale implementation to support
2218 * Contents of the LC_* and LANG environment variables in the CEN style are
2219 not recognized anymore. It never was used. Change by Ulrich Drepper.
2221 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2222 thread-local storage (TLS) ABI on some platforms.
2223 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2225 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2226 EUC-JISX0213, and TSCII.
2228 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2229 BSD-compatible interface for getting all network interface addresses.
2230 Implementation for IPv4 by Roland McGrath.
2232 * Loading of locale data is faster due to the introduction of a locale
2233 archive. Implemented by Roland McGrath and Ulrich Drepper.
2235 * Startup times are significantly reduced by not using exported functions
2236 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2239 * Steven Munroe contributed a port to PowerPC64/Linux.
2243 * The Hurd now uses the GNU libio implementation of stdio rather than the
2244 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2246 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2247 with the same behavior as the Linux system call of the same name.
2251 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2252 128-bit long double format.
2254 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2255 IBM1161, and IBM1162 charsets.
2257 * Andreas Jaeger contributed a port to x86-64/Linux.
2259 * Peter Bruin contributed a port to PowerPC/Hurd.
2261 * libc functions using I/O streams now can handle wide-oriented streams
2264 * optimizations in the dynamic linker. Binaries created by recent binutils
2265 versions start up quicker due to reduced time spent on relocations.
2267 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2271 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2272 asinh, atanh, j0 for the 128-bit long double format.
2274 * Bruno Haible updated all the code handling Unicode in some form to
2275 support Unicode 3.1.
2277 * Speed of regex for single-byte locales is back to previous levels.
2278 Patch by Isamu Hasegawa.
2280 * Alpha, SPARC, and IA-64 now also using floating stacks.
2282 * Startup time of internationalized applications greatly improved through
2283 iconv cache. Use iconvconfig to generate the cache file.
2284 Contributed by Ulrich Drepper.
2286 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2287 severe performance problems. Patch by David Mosberger.
2289 * The Hurd port got a lot more functionality like AIO, various stdio
2290 extensions, etc. Mainly done by Roland McGrath.
2292 * mtrace can now lookup symbols in shared libraries.
2296 * Intel's IA-64 math library is largely integrated. It provides fast and
2297 accurate implementatations for most basic and standard math functions
2298 in float, double, and long double format.
2300 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2301 and asin for the 96-bit long double format and asin, log, tan for the
2302 128-bit long double format.
2304 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2305 The basic double functions exist today. Contributed by Abraham Ziv
2306 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2307 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2309 * An asynchronous name lookup library was added. The interface is designed
2310 after POSIX AIO. The proposal was circulated beforehand to get comments.
2311 No negative ones came in. Implemented by Ulrich Drepper.
2313 * Port to S390/64bit contributed by Martin Schwidefsky
2314 <schwidefsky@de.ibm.com>.
2316 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2317 of functions for Linux/IA-64.
2319 * The RPC code is now thread safe. Threads can now use the same service
2320 of different services at the same time. Patch by Eric Norum
2321 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2323 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2324 family of functions for Linux/S390.
2326 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2327 of functions for Linux/x86.
2329 * Port to Linux/CRIS contributed by Axis Communications.
2333 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2334 we can now check for namespace violations and missing declarations. The
2335 result is that almost all headers are now Unix-compliant (as defined in
2336 the upcoming XPG6). The negative side is that some programs might need
2337 corrections, too, if they depend on the incorrect form of the headers in
2338 previous versions which defined too many symbols and included too many
2341 * regex now handles multibyte character sets correctly.
2342 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2344 * iconv (the program) does now conform to the upcoming XPG6 and handles
2345 charmaps. Instead of the charset names the path of charmaps can be
2346 provided and the conversion happens based on this data.
2347 Contributed by Ulrich Drepper.
2349 * The locale program now provides detailed information about the installed
2354 only lists the names of the supported locales
2358 provides details such as country, language, and codeset name.
2359 Contributed by Ulrich Drepper.
2363 * The gencat program now parses the input file according to the charset
2364 selected by the LC_CTYPE category. This is important for stateful
2365 character sets. To make generating catalogs easier there is a way
2366 to overwrite the charset selected by the locale: before the first
2367 message or $ quote line the catalog can contain a line like
2369 $ codeset=ISO-8859-2
2371 to select the charset (ISO-8859-2 in this case).
2373 Implemented by Shinya Hanataka and Ulrich Drepper.
2375 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2376 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2377 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2379 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2380 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2382 * The LANGUAGE environment variable is now ignored unless the locale is
2383 changed from the default "C" locale.
2385 * The usual bug fixes.
2389 * Greg McGary added runtime support for bounds checking using gcc's
2390 new -fbounded-pointers option. ix86 target is complete. PowerPC
2393 * Thorsten Kukuk added secure mode support to nscd.
2395 * The Berkeley db libraries have been removed.
2397 Related, the nss_db module is now in a separate package since it
2398 obviously requires a database library being available.
2400 * Wide character I/O streams implemented by Ulrich Drepper.
2402 * Functions from the extended socket API added by Ulrich Drepper.
2404 * Functions feenableexcept and fedisableexcept to control the
2405 behaviour of individual exceptions have been added by Andreas Jaeger.
2407 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2409 * The resolver code has been updated from bind 8.2.3-T5B which supports
2410 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2413 This change could in some situations effect backward compatibility. Since
2414 now `_res' is a thread-local instead of a global variable, modifying it
2415 in one thread does not have any effect in other threads.
2417 The resolver library was also extended to allow IPv6 as the transport
2418 protocol for the requests. This work was done by Stig Venaas.
2420 * Compatibility code for K&R C compilers has been removed from the
2421 header files. A ISO C compiler is needed to use the library
2422 (conforming to either C89 or C99 standard).
2424 * Complete rewrite of the localedef program to support multibyte character
2425 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2426 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2427 Implemented by Ulrich Drepper.
2429 Bruno Haible significantly improved the generation and use of the data
2430 structures for the wide character tables.
2432 * Plural handling in gettext implemented by Ulrich Drepper.
2434 * The utmp daemon has been removed.
2436 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2438 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2441 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2443 * POSIX barriers implemented by Kaz Kylheku.
2445 * POSIX spawn function family implemented by Ulrich Drepper.
2447 * POSIX spinlocks are now available.
2449 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2451 * the configure option --enable-kernel=X.Y.Z allows to strip out
2452 compatibility for kernel versions before X.Y.Z. This is currently only
2453 implemented for Linux.
2455 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2456 field sin6_scope_id. This means that all programs using IPv6 should be
2457 recompiled. Don't expect binary compatibility with previous glibc
2460 * various conversion modules for IBM character sets contributed by
2463 * IA-64 port by Jes Sorensen and HJ Lu.
2477 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2479 * New xdr functions are added; some rpc functions are now 64bit clean.
2481 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2483 * Fixed known incompatibilities with glibc 2.0.
2485 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2487 * Optimized a number of functions (especially the ELF dynamic loader).
2489 * Update timezone data files.
2491 * lots of charmaps corrections
2493 * some new locale definitions and charmaps
2498 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2499 conform to POSIX member type requirements. Symbol versions have been
2500 adjusted as needed within the library, and for direct use by applications,
2501 but there is potential for problems if third-party libraries use
2502 struct timeval as part of their interface. This does not present
2503 a problem for X and other "essential" system libraries.
2505 * An additional locale model to support C++ Standard Library locale
2506 model and probably more was implemented by Ulrich Drepper.
2508 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2511 * Miles Bader provided the `argp' function family to support hierachical
2512 command line argument parsing, layered on top of getopt.
2514 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2516 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2519 * scanf recognizes the %a and %A format for scanning floating point numbers.
2521 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2522 information and interfaces for the available integer types.
2524 * about 130 new math functions were added to implement the ISO C9x math
2527 * the new header <complex.h> contains definitions of the complex math
2528 functions from ISO C 9X.
2530 * the new header <tgmath.h> defines generic macros to use complex or
2531 real valued functions.
2533 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2535 * Andreas Jaeger provided a test suite for the math library.
2537 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2539 * Ulrich Drepper added character set conversion functions (iconv).
2541 * Optimized string functions have been added.
2543 * The localedata addon is now part of glibc.
2545 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2547 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2548 daemon for NSS (nscd).
2550 Missing a better place here are some numbers on improvements. Under
2551 Linux 2.1.125 un-tar-ing the kernel sources takes
2555 using local files 12.19s 6.88s 22.91s
2557 using NIS 13.92s 8.91s 26.34s
2559 using NIS & nscd 10.37s 7.34s 25.30s
2561 using NIS+ 27.57s 30.37s 640.46s
2563 using NIS+ & nscd 10.25s 7.83s 26.51s
2565 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2567 Keep in mind that non-namelookup related operations dominate above times.
2568 It was just a common complain that using NIS+ unpacking the kernel is
2571 [1] The old nscd implementation is not available anymore since it was
2572 distributed with glibc up to version 2.0.98 and thus is now replaced.
2574 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2576 * Mark Kettenis provided a Hesiod NSS module.
2578 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2579 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2581 * rcmd can now handle netgroups (Dick Streefland).
2583 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2586 * Support for the IPv6 protocol has been added to the socket API, as per the
2587 latest draft standards.
2589 * Support for Linux 2.2 has been added.
2591 * Interface changes relative to the latest 2.0.x release:
2592 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2593 addseverity NEW: Unix98
2594 alphasort64 NEW: LFS
2595 argp_err_exit_status NEW: argp, GNU ext
2596 argp_error NEW: argp, GNU ext
2597 argp_failure NEW: argp, GNU ext
2598 argp_help NEW: argp, GNU ext
2599 argp_parse NEW: argp, GNU ext
2600 argp_program_bug_address NEW: argp, GNU ext
2601 argp_program_version NEW: argp, GNU ext
2602 argp_program_version_hook NEW: argp, GNU ext
2603 argp_state_help NEW: argp, GNU ext
2604 argp_usage NEW: argp, GNU ext
2605 authdes_create NEW: Secure RPC
2606 authdes_getucred NEW: Secure RPC
2607 authdes_pk_create NEW: Secure RPC
2608 backtrace NEW: GNU ext.
2609 backtrace_symbols NEW: GNU ext.
2610 backtrace_symbols_fd NEW: GNU ext.
2612 cacosf NEW: ISO C 9x
2613 cacosh NEW: ISO C 9x
2614 cacoshf NEW: ISO C 9x
2615 cacoshl NEW: ISO C 9x
2616 cacosl NEW: ISO C 9x
2623 casinf NEW: ISO C 9x
2624 casinh NEW: ISO C 9x
2625 casinhf NEW: ISO C 9x
2626 casinhl NEW: ISO C 9x
2627 casinl NEW: ISO C 9x
2629 catanf NEW: ISO C 9x
2630 catanh NEW: ISO C 9x
2631 catanhf NEW: ISO C 9x
2632 catanhl NEW: ISO C 9x
2633 catanl NEW: ISO C 9x
2634 cbc_crypt NEW: Secure RPC
2638 ccoshf NEW: ISO C 9x
2639 ccoshl NEW: ISO C 9x
2645 cimagf NEW: ISO C 9x
2646 cimagl NEW: ISO C 9x
2647 clearerr_locked REMOVED
2648 clntunix_create NEW: sunrpc ext
2650 clog10 NEW: ISO C 9x
2651 clog10f NEW: ISO C 9x
2652 clog10l NEW: ISO C 9x
2662 cprojf NEW: ISO C 9x
2663 cprojl NEW: ISO C 9x
2665 crealf NEW: ISO C 9x
2666 creall NEW: ISO C 9x
2671 csinhf NEW: ISO C 9x
2672 csinhl NEW: ISO C 9x
2675 csqrtf NEW: ISO C 9x
2676 csqrtl NEW: ISO C 9x
2680 ctanhf NEW: ISO C 9x
2681 ctanhl NEW: ISO C 9x
2683 des_setparity NEW: Secure RPC
2684 ecb_crypt NEW: Secure RPC
2685 endutxent NEW: Unix98
2687 exp10f NEW: ISO C 9x
2688 exp10l NEW: ISO C 9x
2692 fattach NEW: STREAMS
2693 fdetach NEW: STREAMS
2697 feclearexcept NEW: ISO C 9x
2698 fegetenv NEW: ISO C 9x
2699 fegetexceptflag NEW: ISO C 9x
2700 fegetround NEW: ISO C 9x
2701 feholdexcept NEW: ISO C 9x
2703 feraiseexcept NEW: ISO C 9x
2704 ferror_locked REMOVED
2705 fesetenv NEW: ISO C 9x
2706 fesetexceptflag NEW: ISO C 9x
2707 fesetround NEW: ISO C 9x
2708 fetestexcept NEW: ISO C 9x
2709 feupdateenv NEW: ISO C 9x
2710 fflush_locked REMOVED
2714 fgets_unlocked NEW: GNU ext.
2715 fileno_locked REMOVED
2727 fputc_locked REMOVED
2728 fputs_unlocked NEW: GNU ext.
2729 fread_unlocked NEW: GNU ext.
2734 fstatvfs NEW: Unix98
2738 ftruncate64 NEW: LFS
2740 fwrite_unlocked NEW: GNU ext.
2741 gai_strerror NEW: IPv6
2745 getchar_locked REMOVED
2747 getdate_err NEW: Unix98
2748 getdate_r NEW: GNU ext.
2750 getnameinfo NEW: IPv6
2751 getnetname NEW: Secure RPC
2752 getpmsg NEW: STREAMS
2753 getpt NEW: Unix98 PTY
2754 getrlimit64 NEW: LFS
2755 getutxent NEW: Unix98
2756 getutxid NEW: Unix98
2757 getutxline NEW: Unix98
2758 glob64 NEW: GNU ext.
2759 globfree64 NEW: GNU ext.
2760 gnu_get_libc_release NEW: GNU ext.
2761 gnu_get_libc_version NEW: GNU ext.
2762 grantpt NEW: Unix98 PTY
2763 host2netname NEW: Secure RPC
2765 iconv_close NEW: iconv
2766 iconv_open NEW: iconv
2767 if_freenameindex NEW: IPv6
2768 if_indextoname NEW: IPv6
2769 if_nameindex NEW: IPv6
2770 if_nametoindex NEW: IPv6
2771 in6addr_any NEW: IPv6
2772 in6addr_loopback NEW: IPv6
2773 inet6_isipv4mapped NEW: IPv6
2774 isastream NEW: STREAMS
2775 iswblank NEW: GNU ext.
2776 key_decryptsession NEW: Secure RPC
2777 key_decryptsession_pk NEW: Secure RPC
2778 key_encryptsession NEW: Secure RPC
2779 key_encryptsession_pk NEW: Secure RPC
2780 key_gendes NEW: Secure RPC
2781 key_get_conv NEW: Secure RPC
2782 key_secretkey_is_set NEW: Secure RPC
2783 key_setnet NEW: Secure RPC
2784 key_setsecret NEW: Secure RPC
2785 llrint NEW: ISO C 9x
2786 llrintf NEW: ISO C 9x
2787 llrintl NEW: ISO C 9x
2788 llround NEW: ISO C 9x
2789 llroundf NEW: ISO C 9x
2790 llroundl NEW: ISO C 9x
2795 lrintf NEW: ISO C 9x
2796 lrintl NEW: ISO C 9x
2797 lround NEW: ISO C 9x
2798 lroundf NEW: ISO C 9x
2799 lroundl NEW: ISO C 9x
2801 makecontext NEW: Unix98
2802 mempcpy NEW: GNU ext.
2805 modify_ldt NEW: kernel
2809 nearbyint NEW: ISO C 9x
2810 nearbyintf NEW: ISO C 9x
2811 nearbyintl NEW: ISO C 9x
2812 netname2host NEW: Secure RPC
2813 netname2user NEW: Secure RPC
2814 nexttoward NEW: ISO C 9x
2815 nexttowardf NEW: ISO C 9x
2816 nexttowardl NEW: ISO C 9x
2820 passwd2des NEW: Secure RPC
2822 pow10f NEW: GNU ext.
2823 pow10l NEW: GNU ext.
2826 printf_size NEW: GNU ext.
2827 printf_size_info NEW: GNU ext.
2828 profil_counter REMOVED
2829 pthread_mutexattr_getkind_np REPLACED
2830 pthread_mutexattr_setkind_np REPLACED
2831 ptsname NEW: Unix98 PTY
2832 ptsname_r NEW: Unix98 PTY
2834 putchar_locked REMOVED
2835 putgrent NEW: GNU ext.
2837 putpmsg NEW: STREAMS
2838 pututxline NEW: Unix98
2842 readdir64_r NEW: LFS
2843 remquo NEW: ISO C 9x
2844 remquof NEW: ISO C 9x
2845 remquol NEW: ISO C 9x
2847 roundf NEW: ISO C 9x
2848 roundl NEW: ISO C 9x
2850 scalbln NEW: ISO C 9x
2851 scalblnf NEW: ISO C 9x
2852 scalblnl NEW: ISO C 9x
2854 sendfile NEW: kernel
2855 setcontext NEW: Unix98
2856 setrlimit64 NEW: LFS
2857 setutxent NEW: Unix98
2859 sigignore NEW: Unix98
2860 sigqueue NEW: POSIX.1b
2861 sigrelse NEW: Unix98
2862 sigset NEW: POSIX.1b
2863 sigtimedwait NEW: POSIX.1b
2864 sigwaitinfo NEW: POSIX.1b
2865 sincos NEW: GNU ext.
2866 sincosf NEW: GNU ext.
2867 sincosl NEW: GNU ext.
2871 strcasestr NEW: GNU ext.
2872 strtoimax NEW: ISO C 9x
2873 strtoumax NEW: ISO C 9x
2874 strverscmp NEW: GNU ext.
2875 svcauthdes_stats NEW: Secure RPC
2876 svcunix_create NEW: sunrpc etx
2877 svcunixfd_create NEW: sunrpc ext
2878 swapcontext NEW: Unix98
2879 tcgetsid NEW: Unix98 PTY
2880 tdestroy NEW: GNU ext.
2881 tgamma NEW: ISO C 9x
2882 tgammaf NEW: ISO C 9x
2883 tgammal NEW: ISO C 9x
2887 truncf NEW: ISO C 9x
2888 truncl NEW: ISO C 9x
2890 unlockpt NEW: Unix98 PTY
2891 updwtmpx NEW: Unix98
2892 user2netname NEW: Secure RPC
2893 utmpxname NEW: Unix98
2894 versionsort NEW: GNU ext.
2895 versionsort64 NEW: GNU ext.
2897 wcscasecmp NEW: GNU ext.
2898 wcsncasecmp NEW: GNU ext.
2899 wcsnlen NEW: GNU ext.
2900 wcstoimax NEW: ISO C 9x
2901 wcstoll NEW: ISO C 9x
2902 wcstoull NEW: ISO C 9x
2903 wcstoumax NEW: ISO C 9x
2905 wordexp NEW: POSIX.2
2906 wordfree NEW: POSIX.2
2907 write_profiling REMOVED
2908 xdecrypt NEW: Secure RPC
2909 xdr_authdes_cred NEW: Secure RPC
2910 xdr_authdes_verf NEW: Secure RPC
2911 xdr_cryptkeyarg NEW: Secure RPC
2912 xdr_cryptkeyarg2 NEW: Secure RPC
2913 xdr_cryptkeyres NEW: Secure RPC
2914 xdr_getcredres NEW: Secure RPC
2915 xdr_key_netstarg NEW: Secure RPC
2916 xdr_key_netstres NEW: Secure RPC
2917 xdr_keybuf NEW: Secure RPC
2918 xdr_keystatus NEW: Secure RPC
2919 xdr_netnamestr NEW: Secure RPC
2920 xdr_sizeof NEW: Secure RPC
2921 xdr_unixcred NEW: sunrpc ext
2922 xencrypt NEW: Secure RPC
2923 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2934 * inet_ntoa is thread-safe
2936 * updwtmp is moved from libutil to libc
2938 * rewrite of cbrt function
2940 * update of timezone data
2954 * add atoll function
2956 * fix complex problems in Berkeley DB code
2958 * fix math functions
2962 * fixed lots of header problems (especially Linux/GNU specific)
2964 * dynamic loader preserves all registers
2966 * Roland McGrath provided support for handling of auxiliary objects in
2967 the ELF dynamic loader.
2969 * support for parallel builds is improved
2973 * GNU extensions are no longer declared by default. To enable them you
2974 must define the macro `_GNU_SOURCE' in your program or compile with
2977 * The library has changed from using GNU ld symbol aliases to using weak
2978 symbols where available. The ELF object file format supports weak
2979 symbols; GNU ld also supports weak symbols in the a.out format. (There
2980 is also now support for other GNU ld extensions in ELF. Use the
2981 `--with-elf' option to configure to indicate you have ELF, and
2982 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2983 of many files which contained only symbol aliases, reducing the size of
2984 the source and the compiled library; many other files were renamed to
2985 less cryptic names previously occupied by the symbol alias files.
2986 There is a new header file <elf.h> for programs which operate on
2987 files in the ELF format.
2989 * Converted to Autoconf version 2, so `configure' has more options.
2990 Run `configure --help' to see the details.
2992 * The library can now be configured to build profiling, highly-optimized
2993 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2994 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2995 `configure' enable building these extra libraries. The shared library is
2996 built by default when using both ELF and GNU ld. When shared libraries
2997 are enabled, the new library `-ldl' is available for arbitrary run-time
2998 loading of shared objects; its interface is defined in <dlfcn.h>. The
2999 new header file <link.h> gives access to the internals of the run-time
3000 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3001 application of same name on other systems and it provides information
3002 about dynamically linked binaries.
3004 * The C library now provides the run-time support code for profiling
3005 executables compiled with `-pg'. Programs can control the profiling code
3006 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3007 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3008 the support for this file format was contributed by David Mosberger-Tang.
3010 * The math code has been replaced with a math library based on fdlibm from
3011 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3012 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3013 functions. The math functions now reside in a separate library, so
3014 programs using them will need to use `-lm' their linking commands.
3016 * John C. Bowman contributed optimized ix87 assembler inline functions.
3018 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3019 mechanism similar to that found in Solaris 2. This is now used for the
3020 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3021 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3022 file controls what services are used for each individual database. This
3023 works by loading shared libraries with names specified in `nsswitch.conf',
3024 so service modules can be changed or added at any time without even
3025 relinking any program. Currently there are the file, db, and NIS based
3026 NSS services available.
3028 * The new functions `strtoq' and `strtouq' parse integer values from
3029 strings, like `strtol' and `strtoul', but they return `long long int' and
3030 `unsigned long long int' values, respectively (64-bit quantities).
3032 * The new functions `strtof' and `strtold' parse floating-point values from
3033 strings, like `strtod', but they return `float' and `long double' values,
3034 respectively (on some machines `double' and `long double' are the same).
3036 * Ulrich Drepper has contributed new implementations of the floating-point
3037 printing and reading code used in the `printf' family of functions and
3038 `strtod', `strtof', and `strtold'. These new functions are perfectly
3039 accurate, and much faster than the old ones.
3041 * The implementation of the POSIX locale model was completely rewritten by
3042 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3043 to compile the POSIX locale definition.
3045 * The former dummy implementations of the strcoll and strxfrm function are
3046 now replaced by fully functional code contributed by Ulrich Drepper. The
3047 collation information comes from the POSIX locale definitions.
3049 * The new header <langinfo.h> defines an interface for accessing
3050 various locale-dependent data (using the locale chosen with `setlocale').
3052 * Ulrich Drepper has contributed a new suite of functions for operation on
3053 wide-character and multibyte-character strings, in <wchar.h>;
3054 and classification and case conversion of wide characters, in <wctype.h>.
3055 These new functions are conforming to the ISO C, Amendement 1 specification.
3057 * There is now a second implementation of the standard I/O library available.
3058 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3059 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3061 * You can now use positional parameter specifications in format strings
3062 for the `printf' and `scanf' families of functions. For example,
3063 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3064 ``Number 6, Mr Jones''. This is mainly useful when providing different
3065 format strings for different languages, whose grammars may dictate
3066 different orderings of the values being printed. To support this
3067 feature, the interface for `register_printf_handler' has changed; see
3068 the header file <printf.h> for details.
3070 * The `printf' and `scanf' families of functions now understand a new
3071 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3072 to group numbers as indicated by the locale; for `scanf' and friends, this
3073 says to accept as valid only a number with all the proper grouping
3074 separators in the right places. In the default "C" locale, numbers are
3075 not grouped; but locales for specific countries will define the usual
3076 conventions (i.e. separate thousands with `,' in the US locale).
3078 * The pgrp functions have been regularized, slightly incompatibly but much
3079 less confusingly. The core functions are now `getpgid' and `setpgid',
3080 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3081 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3082 provided for compatibility. There is no longer an incompatible `getpgrp'
3083 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3085 * The new header file <fts.h> and suite of functions simplify programs that
3086 operate on directory trees. This code comes from 4.4 BSD.
3088 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3089 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3090 NSS scheme used in glibc.
3092 * There is a new malloc debugging hook `__memalign_hook'.
3094 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3095 `unsigned int' in <sys/types.h>. These are for compatibility only and
3096 their use is discouraged.
3098 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3099 done differently, so that it works even without GNU ld.
3101 * New function `euidaccess' checks allowed access to a file like `access',
3102 but using the effective IDs instead of the real IDs.
3104 * The time zone data files have been updated for the latest and greatest
3105 local time conventions of the countries of the world.
3107 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3110 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3111 for formatting floating-point numbers. They are provided only for
3112 compatibility; new programs should use `sprintf' instead. There are
3113 also equivalent function for the `long double' floating-point type and
3114 all functions also exist in a reentrant form.
3116 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3117 functions for maintaining the login-record files (primarily of use to
3118 system programs such as `login'), and convenient functions for
3119 allocating and initializing a pseudo-terminal (pty) device.
3121 * Ulrich Drepper has contributed new support for System V style
3122 shared memory and IPC on systems that support it.
3124 * Ulrich Drepper has contributed several miscellaneous new functions found
3125 in System V: The `hsearch' family of functions provide an effective
3126 implementation of hash tables; `a64l' and `l64a' provide a very simple
3127 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3130 * Ulrich Drepper has contributed new reentrant counterparts for the
3131 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3133 * Ulrich Drepper has contributed new, highly-optimized versions of several
3134 string functions for the i486/Pentium family of processors.
3136 * Ulrich Drepper has updated the Linux-specific code, based largely
3137 on work done in Hongjiu Lu's version of GNU libc for Linux.
3138 The GNU library now supports Linux versions 2.0.10 and later,
3139 using the ELF object file format (i[3456]86-*-linux).
3141 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3143 * David Mosberger-Tang and Richard Henderson have ported the C library
3144 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3145 dynamic linking support for ELF/Alpha.
3147 * Richard Henderson contributed several Alpha optimized assembler function
3148 for arithmetic and string handling.
3150 * Ulrich Drepper has contributed a new set of message catalog functions to
3151 support multiple languages using the <libintl.h> interface, for use with
3152 his new package GNU gettext. Translation volunteers have contributed
3153 catalogs of the library's messages in Spanish, German, and Korean.
3155 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3156 program and the `catgets' function for reading the catalog files it
3157 creates. (The <libintl.h> interface is preferred; we include the
3158 <nl_types.h> interface using `catgets' only for source compatibility with
3159 programs already written to use it.)
3161 * New header file <values.h> gives SVID-compatible names for <limits.h>
3164 * Various new macros, declarations, and small header files for compatibility
3167 * New function `group_member' is a convenient way to check if a process has
3168 a given effective group ID.
3170 * When using GCC 2.7 and later, the socket functions are now declared in a
3171 special way so that passing an argument of type `struct sockaddr_in *',
3172 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3173 `struct sockaddr *' type, does not generate a type-clash warning.
3175 * New function `error' declared in header file <error.h> is a convenient
3176 function for printing error messages and optionally exiting; this is the
3177 canonical function used in GNU programs. The new functions `err', `warn',
3178 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3179 doing the same thing.
3181 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3182 POSIX.2 `glob' function to do ~ and {...} expansion.
3184 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3185 `clearenv' which is used in POSIX.9 is also available.
3187 * New function `getsid' returns session ID number on systems that support it.
3189 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3190 files <db.h> and <mpool.h> provide a rich set of functions for several
3191 types of simple databases stored in memory and in files, and <ndbm.h> is
3192 an old `ndbm'-compatible interface using the `db' functions. Link with
3193 `-ldb' to get these functions.
3195 * New macro `strdupa' copies a string like `strdup', but uses local stack
3196 space from `alloca' instead of dynamic heap space from `malloc'.
3198 * New function `strnlen' is like `strlen' but searches only a given maximum
3199 number of characters for the null terminator. `stpncpy', `strndup' and
3200 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3203 * New function `statfs' in header <sys/statfs.h>.
3205 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3206 provide convenient functions for operating on blocks of null-terminated
3209 * A new suite of functions in <utmp.h> handle all the details of reading
3210 and writing the utmp file.
3212 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3215 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3216 completely POSIX compliant and also implemented the extended functionality
3217 to handle alternate digit representation and alternate era date formats.
3219 * Ulrich Drepper provided an implementation of the `strptime' function
3220 defined in XPG4.2 which transforms a string into a `struct tm' value.
3222 * Paul Eggert provided the tzselect shell script as part of the timezone
3223 code. The shell script makes it easy to select the correct timezone
3226 * The implementation of the malloc family of functions is completely replaced
3227 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3228 The implementation uses the mmap function (if available) and it is
3229 optimized for the use in multi threaded programs.
3231 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3232 functions. This new functionality is usable by specifying a special
3233 salt string and it is compatible with implementation on *BSD systems.
3235 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3236 `getsubopt' to handle second level command line options, `bsd_signal'
3237 to access BSD style `signal' functionality, the obsolete `regexp' style
3240 * the `lchown' function is available on system which support this
3243 * The implementation of the shadow password handling function was contributed
3246 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3248 * POSIX.1g support was added. The <sys/select.h> header is available,
3249 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3250 implementation of `getaddrinfo'.
3254 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3256 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3257 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3259 * The new function `daemon' from 4.4 BSD is useful for server programs that
3260 want to put themselves in the background.
3262 * Joel Sherrill has contributed support for several standalone boards that
3263 run without an operating system.
3265 * `printf', `scanf' and friends now accept a `q' type modifier for long
3266 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3268 * All of the code taken from BSD (notably most of the math and networking
3269 routines) has been updated from the BSD 4.4-Lite release.
3271 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3273 * The new functions `getdomainname' and `setdomainname' fetch or change the
3274 YP/NIS domain name. These are system calls which exist on systems which
3277 * The time zone data files have been updated for the latest international
3280 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3281 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3285 * The C library now includes support for Sun RPC, from Sun's free
3286 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3287 are included. (There is still no support for YP.)
3289 * Tom Quinn has contributed a port of the C library to SGI machines running
3290 Irix 4 (mips-sgi-irix4).
3292 * The new `lockf' function is a simplified interface to the locking
3293 facilities of `fcntl', included for compatibility.
3295 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3297 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3299 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3302 * The error message printed by `assert' for a failed assertion now includes
3303 the name of the program (if using GNU ld) and the name of the calling
3304 function (with versions of GCC that support this).
3306 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3308 * The library now includes the <sys/mman.h> header file and memory
3309 management functions `mmap', `munmap', `mprotect', `msync', and
3310 `madvise', on systems that support those facilities.
3312 * The interface for `mcheck' has changed slightly: the function called to
3313 abort the program when an allocation inconsistency is detected now takes
3314 an argument that indicates the type of failure. The new function
3315 `mprobe' lets you request a consistency check for a particular block at
3316 any time (checks are normally done only when you call `free' or `realloc'
3319 * It is now possible to easily cross-compile the C library, building on one
3320 system a library to run on another machine and/or operating system. All
3321 you need to do is set the variable `HOST_CC' in `configparms' to the
3322 native compiler for programs to run on the machine you are building on (a
3323 few generator programs are used on Unix systems); set `CC' to the
3326 * The new function `fexecve' (only implemented on the GNU system) executes
3327 a program file given a file descriptor already open on the file.
3331 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3332 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3334 * You can set the variable `libprefix' in `configparms' to specify a prefix
3335 to be prepended to installed library files; this makes it easy to install
3336 the GNU C library to be linked as `-lgnuc' or whatever.
3338 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3339 copies a limited number of characters from a string, and returns the
3340 address of the last character written.
3342 * You no longer need to check for whether the installed `stddef.h' is
3343 compatible with the GNU C library. configure now checks for you.
3345 * You can now define a per-stream `fileno' function to convert the
3346 stream's cookie into an integral file descriptor.
3348 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3349 allocates zero bytes of storage, and returns a unique pointer which
3350 you can pass to `realloc' or `free'. The behavior is undefined if
3351 you dereference this pointer.
3353 * The C library now runs on Sony NEWS m68k machines running either
3354 NewsOS 3 or NewsOS 4.
3356 * The new `syscall' function is a system-dependent primitive function
3357 for invoking system calls. It has the canonical behavior on Unix
3358 systems, including unreliable return values for some calls (such as
3359 `pipe', `fork' and `getppid').
3361 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3362 to `EAGAIN', which is the preferred name. On systems whose kernels
3363 use two distinct codes, the C library now translates EWOULDBLOCK to
3364 EAGAIN in every system call function.
3368 * The GNU C Library Reference Manual is now distributed with the library.
3369 `make dvi' will produce a DVI file of the printed manual.
3370 `make info' will produce Info files that you can read on line using C-h i
3371 in Emacs or the `info' program.
3372 Please send comments on the manual to bug-glibc-manual@gnu.org.
3374 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3376 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3378 * Jason Merrill has contributed a port to the Sequent Symmetry running
3379 Dynix version 3 (i386-sequent-dynix).
3381 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3382 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3384 * New function `memory_warnings' lets you arrange to get warnings when
3385 malloc is running out of memory to allocate, like Emacs gives you.
3387 * The C library now contains the relocating allocator used in Emacs 19 for
3388 its editing buffers. This allocator (ralloc) minimizes allocation
3389 overhead and fragmentation by moving allocated regions around whenever it
3390 needs to. You always refer to a ralloc'd region with a "handle" (a
3391 pointer to a pointer--an object of type `void **').
3393 * There is a new `printf' format: `%m' gives you the string corresponding
3394 to the error code in `errno'.
3396 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3397 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3398 pass, the `a' modifier says to fill in a `char **' you pass with a
3401 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3402 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3403 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3405 * `mkstemp' is a traditional Unix function to atomically create and open a
3406 uniquely-named temporary file.
3410 * The standard location for the file that says what the local timezone is
3411 has changed again. It is now `/usr/local/etc/localtime' (or more
3412 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3414 * The distribution no longer contains any files with names longer than 14
3417 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3418 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3420 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3424 * The configuration process has changed quite a bit. The `configure'
3425 script is now used just like the configuration scripts for other GNU
3426 packages. The `sysdeps' directory hierarchy is much rearranged.
3427 The file `INSTALL' explains the new scheme in detail.
3429 * The header files no longer need to be processed into ANSI C and
3430 traditional C versions. There is just one set of files to install, and
3431 it will work with ANSI or old C compilers (including `gcc -traditional').
3433 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3434 MIPS DECStation running Ultrix 4.
3436 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3437 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3438 made itself into a shared library.
3440 * Yet further improved support for the i386, running 4.3 BSD-like systems
3441 (such as Mach 3 with the Unix single-server), or System V.
3443 * New function `strncasecmp' to do case-insensitive string comparison
3444 with limited length.
3446 * New function `strsep' is a reentrant alternative to `strtok'.
3448 * New functions `scandir' and `alphasort' for searching directories.
3450 * New function `setenv' is a better interface to `putenv'.
3452 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3453 function for traversing a directory tree.
3455 * The GNU obstack package is now also part of the C library.
3456 The new function `open_obstack_stream' creates a stdio stream that
3457 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3458 formatted output directly to an obstack.
3460 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3461 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3463 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3465 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3466 things to your strings.
3468 * There are some new test programs: test-fseek, testmb, and testrand.
3470 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3471 These ports are not finished, but are a good starting place for really
3472 supporting those systems.
3474 * `/etc/localtime' is now the standard location for the file that says what
3475 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3476 This follows the general principle that `/etc' is the place for all local
3477 configuration files.
3479 * The C library header files now use `extern "C"' when used by the C++
3480 compiler, so the C library should now work with C++ code.
3482 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3483 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3486 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3487 function which uses the `merge sort' algorithm, and is said to be
3488 significantly faster than the old GNU `qsort' function. Merge sort is
3489 now the standard `qsort' function. The new algorithm can require a lot
3490 of temporary storage; so, the old sorting function is called when the
3491 required storage is not available.
3493 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3494 provides the Unix `crypt' function, plus some other entry points.
3496 * The code and header files taken from 4.4 BSD have been updated with the
3497 latest files released from Berkeley.
3499 ----------------------------------------------------------------------
3500 Copyright information:
3502 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3504 Permission is granted to anyone to make or distribute verbatim copies
3505 of this document as received, in any medium, provided that the
3506 copyright notice and this permission notice are preserved,
3507 thus giving the recipient permission to redistribute in turn.
3509 Permission is granted to distribute modified versions
3510 of this document, or of portions of it,
3511 under the above conditions, provided also that they
3512 carry prominent notices stating who last changed them.
3515 version-control: never