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 nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
26 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
27 Since the GNU C Library defaults to a much newer revision of POSIX, this
28 will only affect programs that specifically request an old conformance
29 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
30 see a change in the visible declarations, but a program compiled with
31 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
34 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
35 defined by all multithreaded code, but glibc has not required this for
38 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
39 means that in a future release, the macros “major”, “minor”, and “makedev”
40 will only be available from <sys/sysmacros.h>.
42 These macros are not part of POSIX nor XSI, and their names frequently
43 collide with user code; see for instance glibc bug 19239 and Red Hat bug
44 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
45 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
48 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
49 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
50 the femode_t type and the FE_DFL_MODE macro.
52 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
53 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
54 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
55 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
56 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
57 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
58 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
59 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
60 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
61 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
62 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
65 * New <math.h> features are added from TS 18661-1:2014:
67 - Signaling NaN macros: SNANF, SNAN, SNANL.
69 - llogb functions: the llogb, llogbf and llogbl functions, and the
70 FP_LLOGB0 and FP_LLOGBNAN macros.
72 - Comparison macros: iseqsig.
74 - Classification macros: iscanonical, issubnormal, iszero.
76 - Total order functions: totalorder, totalorderf, totalorderl,
77 totalordermag, totalordermagf, totalordermagl.
79 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
81 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
82 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
84 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
85 are added to libc. They convert a floating-point number into string.
87 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
88 to float instead of double. This does not affect the ABI of any libraries
89 that are part of the GNU C Library, but may affect the ABI of other
90 libraries that use this type in their interfaces.
92 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
93 float_t and double_t types are now defined to long double instead of float
94 and double. These options are not the default, and this does not affect
95 the ABI of any libraries that are part of the GNU C Library, but it may
96 affect the ABI of other libraries that use this type in their interfaces,
97 if they are compiled or used with those options.
99 * The getentropy and getrandom functions, and the <sys/random.h> header file
102 * The buffer size for byte-oriented stdio streams is now limited to 8192
103 bytes by default. Previously, on Linux, the default buffer size on most
104 file systems was 4096 bytes (and thus remains unchanged), except on
105 network file systems, where the buffer size was unpredictable and could be
106 as large as several megabytes.
108 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
109 for the Linux quota interface which predates kernel version 2.4.22 has
112 * The malloc_get_state and malloc_set_state functions have been removed.
113 Already-existing binaries that dynamically link to these functions will
114 get a hidden implementation in which malloc_get_state is a stub. As far
115 as we know, these functions are used only by GNU Emacs and this change
116 will not adversely affect already-built Emacs executables. Any undumped
117 Emacs executables, which normally exist only during an Emacs build, should
118 be rebuilt by re-running “./configure; make” in the Emacs build tree.
120 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
121 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
122 “no-ip6-dotint” had already been the default, and support for the
123 “ip6-dotint” option was removed from the Internet in 2006.
125 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
126 flag from <resolv.h> have been removed. The option relied on a
127 backwards-incompatible DNS extension which was never deployed on the
130 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG defined
131 in the <resolv.h> header file have been deprecated. They were already
134 * DNSSEC-related declarations and definitions have been removed from the
135 <arpa/nameser.h> header file, and libresolv will no longer attempt to
136 decode the data part of DNSSEC record types. Previous versions of glibc
137 only implemented minimal support for the previous version of DNSSEC, which
138 is incompatible with the currently deployed version.
140 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
141 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
142 <arpa/nameser.h> header file because the distinction between RR types and
143 meta-RR types is not officially standardized, subject to revision, and
144 thus not suitable for encoding in a macro.
146 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
147 and rhook members of the res_state type in <resolv.h> have been removed.
148 The glibc stub resolver did not support these hooks, but the header file
149 did not reflect that.
151 * For multi-arch support it is recommended to use a GCC which has
152 been built with support for GNU indirect functions. This ensures
153 that correct debugging information is generated for functions
154 selected by IFUNC resolvers. This support can either be enabled by
155 configuring GCC with '--enable-gnu-indirect-function', or by
156 enabling it by default by setting 'default_gnu_indirect_function'
157 variable for a particular architecture in the GCC source file
160 * GDB pretty printers have been added for mutex and condition variable
161 structures in POSIX Threads. When installed and loaded in gdb these pretty
162 printers show various pthread variables in human-readable form when read
163 using the 'print' or 'display' commands in gdb.
165 Security related changes:
167 On ARM EABI (32-bit), generating a backtrace for execution contexts which
168 have been created with makecontext could fail to terminate due to a
169 missing .cantunwind annotation. This has been observed to lead to a hang
170 (denial of service) in some Go applications compiled with gccgo. Reported
171 by Andreas Schwab. (CVE-2016-6323)
173 The following bugs are resolved with this release:
175 [The release manager will add the list generated by
176 scripts/list-fixed-bugs.py just before the release.]
180 * The minimum Linux kernel version that this version of the GNU C Library
181 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
182 kernel version 2.6.32 or later suffices (on architectures that already
183 required kernel versions more recent than 3.2, those requirements remain
184 unchanged). Linux 3.2 or later kernel headers are required on all
187 * The pap_AN locale has been deleted. This has been deprecated for a long
188 time. It has been replaced by pap_AW & pap_CW, both of which have long
189 been included in previous releases.
191 * The readdir_r and readdir64_r functions have been deprecated. It is
192 recommended to use readdir and readdir64 instead.
194 * The type “union wait” has been removed. It was deprecated in the early
195 1990s and never part of POSIX. Application code should use the int type
196 instead of “union wait”.
198 * A new NSS action is added to facilitate large distributed system
199 administration. The action, MERGE, allows remote user stores like LDAP
200 to be merged into local user stores like /etc/groups in order to provide
201 easy to use, updated, and managed sets of merged credentials. The new
202 action can be used by configuring it in /etc/nsswitch.conf:
203 group: files [SUCCESS=merge] nis
204 Implemented by Stephen Gallagher (Red Hat).
206 * The deprecated __malloc_initialize_hook variable has been removed from the
209 * The long unused localedef --old-style option has been removed. It hasn't
210 done anything in over 16 years. Scripts using this option can safely
213 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
214 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
215 return the next representable value in the direction of positive infinity
216 and the nextdown functions return the next representable value in the
217 direction of negative infinity. These are currently enabled as GNU
220 Security related changes:
222 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
223 could result in a stack overflow when getnetbyname was called with an
224 overly long name. (CVE-2016-3075)
226 * Previously, getaddrinfo copied large amounts of address data to the stack,
227 even after the fix for CVE-2013-4458 has been applied, potentially
228 resulting in a stack overflow. getaddrinfo now uses a heap allocation
229 instead. Reported by Michael Petlan. (CVE-2016-3706)
231 * The glob function suffered from a stack-based buffer overflow when it was
232 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
233 Reported by Alexander Cherepanov. (CVE-2016-1234)
235 * The Sun RPC UDP client could exhaust all available stack space when
236 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
237 alloca plugin for GCC. (CVE-2016-4429)
239 * The IPv6 name server management code in libresolv could result in a memory
240 leak for each thread which is created, performs a failing naming lookup,
241 and exits. Over time, this could result in a denial of service due to
242 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
244 The following bugs are resolved with this release:
246 [1170] localedata: ne_NP: update Nepali locale definition file
247 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
249 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
250 [6796] math: fdim() does not set errno on overflow
251 [10354] libc: posix_spawn should use vfork() in more cases than presently
252 [11213] localedata: localedata: add copyright disclaimer to locale files
253 [12143] localedata: chr_US: new Cherokee locale
254 [12450] localedata: sgs_LT: new locale
255 [12676] localedata: ln_CD: new locale
256 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
258 [13304] math: fma, fmaf, fmal produce wrong results
259 [14259] build: --localedir arg to configure is ignored
260 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
261 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
262 [14934] localedata: es_CL: wrong first weekday chilean locale
263 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
265 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
267 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
268 [15368] nptl: raise() is not async-signal-safe
269 [15479] math: ceil, floor, round and trunc raise inexact exception
270 [15578] localedata: kk_KZ: various updates
271 [16003] localedata: pap_AN: punt old locale
272 [16137] localedata: iw_IL: punt old locale
273 [16190] localedata: eo: new esperanto locale
274 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
275 [16742] malloc: race condition: pthread_atfork() called before first
276 malloc() results in unexpected locking behaviour/deadlocks
277 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
279 [16983] localedata: postal_fmt does not allow %l and %n modifiers
280 [17565] localedata: pt_PT: wrong (work-)week start
281 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
282 [17950] build: Build fails with -msse
283 [18205] localedata: be_BY*: wrong first_weekday and first_workday
284 [18433] libc: posix_spawn does not return correctly upon failure to
286 [18453] localedata: charmaps/IBM875: incorrect codes
287 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
289 [18896] localedata: he_IL: improvements for currency
290 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
292 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
294 [19056] libc: Deprecate readdir_r
295 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
297 [19198] localedata: nl_NL: small improvements for Dutch locales
298 [19257] network: Per-thread memory leak in __res_vinit with IPv6
299 nameservers (CVE-2016-5417)
300 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
302 [19400] locale: Language missing in "iso-639.def", trivial fix in
304 [19431] malloc: Deadlock between fflush, getdelim, and fork
305 [19505] libc: Incorrect file descriptor validity checks in
306 posix_spawn_file_actions_add{open,close,dup2}
307 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
309 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
310 `intl/{gettextP,loadinfo}.h'
311 [19534] libc: execle, execlp may use malloc
312 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
313 [19573] network: res_nclose and __res_maybe_init disagree about name
314 server initialization, breaking Hesiod
315 [19575] localedata: Status of GB18030 tables
316 [19581] localedata: sr_* date_fmt string contains additional newline
317 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
319 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
320 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
321 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
322 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
324 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
326 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
328 [19610] dynamic-link: ldconfig -X removes stale symbolic links
329 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
330 [19633] locale: strfmon_l applies global locale to number formatting
331 [19642] network: Memory leak in getnameinfo
332 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
333 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
335 [19654] math: [x86_64] Need testcase for BZ #19590 fix
336 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
338 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
339 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
341 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
343 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
345 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
346 pointers and lengths in error-case.
347 [19727] locale: Converting from/to UTF-xx with iconv() does not always
348 report errors on UTF-16 surrogates values.
349 [19755] nscd: nscd assertion failure in gc
350 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
351 [19759] libc: mempcpy shouldn't be inlined
352 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
353 [19765] libc: s390 needs an optimized mempcpy
354 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
355 NAME_MAX limit assumption (CVE-2016-1234)
356 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
357 [19787] network: Missing and incorrect truncation checks in getnameinfo
358 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
360 [19791] network: Assertion failure in res_query.c with un-connectable name
362 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
363 [19822] math: libm.so install clobbers old version
364 [19825] network: resolv: send_vc can return uninitialized data in second
365 response to getaddrinfo
366 [19830] network: nss_dns: should check RDATA length against buffer length
367 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
368 confronted with A/AAAA records of invalid size
369 [19837] nss: nss_db: No retries for some long lines with a larger buffer
370 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
371 [19853] stdio: Printing IBM long double in decimal with high precision is
373 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
374 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
375 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
377 [19865] network: Assertion failure or memory leak in
378 _nss_dns_getcanonname_r
379 [19868] network: nss_dns: netent code does not skip over non-PTR records
380 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
382 [19881] string: Improve x86-64 memset
383 [19907] string: Incorrect memcpy tests
384 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
386 [19925] libc: termios.h XCASE namespace
387 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
388 [19929] libc: limits.h NL_NMAX namespace
389 [19931] stdio: Memory leak in vfprintf
390 [19957] libc: clone(CLONE_VM) access invalid parent memory
391 [19963] localedata: en_IL: New locale
392 [19989] stdio: stdio.h cuserid namespace
393 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
395 [19996] locale: langinfo.h nl_langinfo_l namespace
396 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
397 [20010] network: getaddrinfo: Stack overflow in hostent translation
399 [20012] stdio: libio: fmemopen append mode failure
400 [20014] stdio: stdio.h namespace for pre-threads POSIX
401 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
402 [20023] libc: fcntl.h timespec namespace
403 [20024] math: [x86_64] vectorized sincos trashes the stack
404 [20031] network: nss_hesiod: Heap overflow in get_txt_records
405 [20041] time: sys/time.h timespec namespace
406 [20043] libc: unistd.h missing cuserid for UNIX98 and before
407 [20044] libc: unistd.h missing pthread_atfork for UNIX98
408 [20051] libc: ttyslot in wrong header under wrong conditions
409 [20054] libc: gethostname not declared for XPG4
410 [20055] libc: termios.h missing tcgetsid for XPG4
411 [20072] dynamic-link: x86 init_cpu_features is called twice in static
413 [20073] libc: sys/stat.h fchmod namespace
414 [20074] libc: stdlib.h rand_r namespace
415 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
416 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
418 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
419 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
421 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
422 [20119] libc: Wrong mask for processors level type from CPUID
423 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
424 AS not supporting AVX512
425 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
427 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
428 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
430 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
431 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
432 [20178] libc: posix_spawn{p} should not call exit
433 [20191] stdio: libio: vtables hardening
434 [20195] string: FMA4 detection requires CPUID execution with register
436 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
437 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
439 [20212] math: acos (sNaN) returns sNaN
440 [20213] math: asin (sNaN) returns sNaN
441 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
442 [20218] math: [i386] asinhl (sNaN) returns sNaN
443 [20219] math: [i386] atanhl (sNaN) returns sNaN
444 [20222] stdio: fopencookie: Mangle function pointers
445 [20224] math: [i386] cbrtl (sNaN) returns sNaN
446 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
447 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
449 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
450 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
451 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
452 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
453 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
454 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
455 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
456 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
457 [20240] math: modf (sNaN) returns sNaN
458 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
459 [20250] math: frexp (sNaN) returns sNaN
460 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
461 [20255] math: [i386] fdim, fdimf return with excess range and precision /
463 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
464 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
465 subscript is below array bounds [-Werror=array-bounds]
466 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
467 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
469 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
470 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
472 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
474 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
475 [20316] localedata: id_ID: Februari instead of Pebruari
476 [20327] string: POWER8 strcasecmp returns incorrect result
477 [20347] math: Failure: Test: j0_downward (0xap+0)
478 [20348] libc: FAIL: misc/tst-preadvwritev64
479 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
480 [20350] libc: There is no test for p{read,write}64
481 [20357] math: Incorrect cos result for 1.5174239687223976
482 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
486 * Unicode 8.0.0 Support: Character encoding, character type info, and
487 transliteration tables are all updated to Unicode 8.0.0, using new
488 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
489 These updates cause user visible changes, such as the fixes for bugs
490 89, 16061, and 18568.
492 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
493 kernel-internal CPU set size. This means that requests that change the
494 CPU affinity which failed before (for example, an all-ones CPU mask) will
495 now succeed. Applications that need to determine the effective CPU
496 affinities need to call sched_getaffinity or pthread_getaffinity_np after
497 setting it because the kernel can adjust it (and the previous size check
498 would not detect this in the majority of cases).
500 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
501 the following new symbols are used: fts64_children, fts64_close,
502 fts64_open, fts64_read and fts64_set.
504 * getaddrinfo now detects certain invalid responses on an internal netlink
505 socket. If such responses are received, an affected process will
506 terminate with an error message of "Unexpected error <number> on netlink
507 descriptor <number>" or "Unexpected netlink response of size <number> on
508 descriptor <number>". The most likely cause for these errors is a
509 multi-threaded application which erroneously closes and reuses the netlink
510 file descriptor while it is used by getaddrinfo.
512 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
513 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
514 unnecessary serialization of memory allocation requests across threads.
515 The defect is now corrected. Users should see a substantial increase in
516 the concurent throughput of allocation requests for applications which
517 trigger this bug. Affected applications typically create and
518 destroy threads frequently. (Bug 19048 was reported and analyzed by
521 * There is now a --disable-timezone-tools configure option for disabling the
522 building and installing of the timezone related utilities (zic, zdump, and
523 tzselect). This is useful for people who build the timezone data and code
524 independent of the GNU C Library.
526 * The obsolete header <regexp.h> has been removed. Programs that require
527 this header must be updated to use <regex.h> instead.
529 * The obsolete functions bdflush, create_module, get_kernel_syms,
530 query_module and uselib are no longer available to newly linked binaries;
531 the header <sys/kdaemon.h> has been removed. These functions and header
532 were specific to systems using the Linux kernel and could not usefully be
533 used with the GNU C Library on systems with version 2.6 or later of the
536 * Optimized string, wcsmbs and memory functions for IBM z13.
537 Implemented by Stefan Liebler.
539 * Newly linked programs that define a variable called signgam will no longer
540 have it set by the lgamma, lgammaf and lgammal functions. Programs that
541 require signgam to be set by those functions must ensure that they use the
542 variable provided by the GNU C Library and declared in <math.h>, without
543 defining their own copy.
545 * The minimum GCC version that can be used to build this version of the GNU
546 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
547 still be used to compile programs using the GNU C Library.
549 Security related changes:
551 * An out-of-bounds value in a broken-out struct tm argument to strftime no
552 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
554 * The LD_POINTER_GUARD environment variable can no longer be used to disable
555 the pointer guard feature. It is always enabled. Previously,
556 LD_POINTER_GUARD could be used to disable security hardening in binaries
557 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
560 * An integer overflow in hcreate and hcreate_r could lead to an
561 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
563 * The catopen function no longer has unbounded stack usage. Reported by
566 * The nan, nanf and nanl functions no longer have unbounded stack usage
567 depending on the length of the string passed as an argument to the
568 functions. Reported by Joseph Myers. (CVE-2014-9761)
570 * A stack-based buffer overflow was found in libresolv when invoked from
571 libnss_dns, allowing specially crafted DNS responses to seize control
572 of execution flow in the DNS client. The buffer overflow occurs in
573 the functions send_dg (send datagram) and send_vc (send TCP) for the
574 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
575 family. The use of AF_UNSPEC triggers the low-level resolver code to
576 send out two parallel queries for A and AAAA. A mismanagement of the
577 buffers used for those queries could result in the response of a query
578 writing beyond the alloca allocated buffer created by
579 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
580 the overflow. Thanks to the Google Security Team and Red Hat for
581 reporting the security impact of this issue, and Robert Holiday of
582 Ciena for reporting the related bug 18665. (CVE-2015-7547)
584 The following bugs are resolved with this release:
586 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
587 [887] math: Math library function "logb" and "nextafter" inconsistent
588 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
589 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
590 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
591 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
593 [4404] localedata: German translation of "Alarm clock" is misleading
594 [6799] math: nextafter() and nexttoward() doen't set errno on
595 overflow/underflow errors
596 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
598 [10432] nis: _nss_nis_setnetgrent assertion failure
599 [11460] libc: fts has no LFS support
600 [12926] network: getaddrinfo()/make_request() may spin forever
601 [13065] nptl: Race condition in pthread barriers
602 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
603 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
605 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
606 [14912] libc: Rename non-installed bits/*.h headers
607 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
608 [15367] math: Let gcc use __builtin_isinf
609 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
610 [15421] math: lgamma wrongly sets signgam for ISO C
611 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
612 FE_INVALID with argument out of range
613 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
615 [15786] dynamic-link: ifunc resolver functions can smash function
617 [15918] math: Unnecessary check for equality in hypotf()
618 [16061] localedata: Review / update transliteration data
619 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
621 [16141] time: strptime %z offset restriction
622 [16171] math: drem should be alias of remainder
623 [16296] math: fegetround is pure?
624 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
625 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
627 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
628 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
630 [16422] math: [powerpc] math-float, math-double failing llrint tests with
631 "Exception "Inexact" set" on ppc32
632 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
633 [16517] math: Missing underflow exception from tanf/tan/tanl
634 [16519] math: Missing underflow exception from sinhf
635 [16520] math: Missing underflow exception from tanhf
636 [16521] math: Missing underflow exception from exp2
637 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
639 [16734] stdio: fopen calls mmap to allocate its buffer
640 [16961] math: nan function incorrect handling of bad sequences
641 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
642 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
643 [16985] locale: localedef: confusing error message when opening output
645 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
646 [17197] locale: Redundant shift character in iconv conversion output at
648 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
649 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
650 [17250] dynamic-link: static linking breaks nss loading
651 (getaddrinfo/getpwnam/etc...)
652 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
654 [17441] math: isnan() should use __builtin_isnan() in GCC
655 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
656 (related to lock elision)
657 [17787] manual: Exponent on page 324 of the PDF ends prematurely
658 [17886] time: strptime should be able to parse "Z" as a timezone with %z
659 [17887] time: strptime should be able to parse "+01:00" style timezones
660 [17905] libc: catopen() Multiple unbounded stack allocations
662 [18084] libc: backtrace (..., 0) dumps core on x86
663 [18086] libc: nice() sets errno to 0 on success
664 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
665 is too large (CVE-2015-8778)
666 [18251] dynamic-link: SONAME missing when audit modules provides path
667 [18265] libc: add attributes for wchar string and memory functions
668 [18370] math: csqrt missing underflows
669 [18421] libc: [hppa] read-only segment has dynamic relocations
670 [18472] libc: Obsolete syscall wrappers should be compat symbols
671 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
672 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
673 [18525] localedata: Remove locale timezone information
674 [18560] libc: [powerpc] spurious bits/ipc.h definitions
675 [18568] localedata: Update locale data to Unicode 8.0
676 [18589] locale: sort-test.sh fails at random
677 [18595] math: ctan, ctanh missing underflows
678 [18604] libc: assert macro-expands its argument
679 [18610] math: S390: fetestexcept() reports any exception if DXC-code
680 contains a vector instruction exception.
681 [18611] math: j1, jn missing errno setting on underflow
682 [18618] localedata: sync Chechen locale definitions with other *_RU
684 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
685 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
686 [18665] network: In send_dg, the recvfrom function is NOT always using the
687 buffer size of a newly created buffer (CVE-2015-7547)
688 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
690 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
692 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
693 [18699] math: tilegx cproj() for various complex infinities does not yield
695 [18724] libc: Harden put*ent functions against data injection
696 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
697 [18755] build: build errors with -DNDEBUG
698 [18757] stdio: fmemopen fails to set errno on failure
699 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
701 [18781] libc: openat64 lacks O_LARGEFILE
702 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
703 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
704 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
705 [18790] math: [ldbl-128ibm] tanhl inaccurate
706 [18795] libc: stpncpy fortification misses buffer lengths that are
708 [18796] build: build fails for --disable-mathvec
709 [18803] math: hypot missing underflows
710 [18820] stdio: fmemopen may leak memory on failure
711 [18823] math: csqrt spurious underflows
712 [18824] math: fma spurious underflows
713 [18825] math: pow missing underflows
714 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
715 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
716 [18870] build: sem_open.c fails to compile with missing symbol
718 [18872] stdio: Fix memory leak in printf_positional
719 [18873] libc: posix_fallocate overflow check ineffective
720 [18875] math: Excess precision leads incorrect libm
721 [18877] libc: arm: mmap offset regression
722 [18887] libc: memory corruption when using getmntent on blank lines
723 [18918] localedata: hu_HU: change time to HH:MM:SS format
724 [18921] libc: Regression: extraneous stat() and fstat() performed by
726 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
727 binaries (CVE-2015-8777)
728 [18951] math: tgamma missing underflows
729 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
731 [18953] localedata: lt_LT: change currency symbol to the euro
732 [18956] math: powf inaccuracy
733 [18961] math: [i386] exp missing underflows
734 [18966] math: [i386] exp10 missing underflows
735 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
736 [18969] build: multiple string test failures due to missing locale
738 [18970] libc: Reference of pthread_setcancelstate in libc.a
739 [18977] math: float / long double Bessel functions not in XSI POSIX
740 [18980] math: i386 libm functions return with excess range and precision
741 [18981] math: i386 scalb*, ldexp return with excess range and precision
742 [18982] stdio: va_list and vprintf
743 [18985] time: Passing out of range data to strftime() causes a segfault
745 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
746 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
747 [19012] locale: iconv_open leaks memory on error path
748 [19016] math: clog, clog10 inaccuracy
749 [19018] nptl: Mangle function pointers in tls_dtor_list
750 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
751 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
752 [19048] malloc: malloc: arena free list can become cyclic, increasing
754 [19049] math: [powerpc] erfc incorrect zero sign
755 [19050] math: [powerpc] log* incorrect zero sign
756 [19058] math: [x86_64] Link fail with -fopenmp and -flto
757 [19059] math: nexttoward overflow incorrect in non-default rounding modes
758 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
759 [19074] network: Data race in _res_hconf_reorder_addrs
760 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
761 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
762 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
764 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
766 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
767 [19086] manual: posix_fallocate64 documented argument order is wrong.
768 [19088] math: lround, llround missing exceptions close to overflow
770 [19094] math: lrint, llrint missing exceptions close to overflow threshold
771 [19095] math: dbl-64 lrint incorrect for 64-bit long
772 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
773 [19124] dynamic-link: ld.so failed to build with older assmebler
774 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
775 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
776 [19134] math: [powerpc32] lround, lroundf spurious exceptions
777 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
778 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
779 pthread_setaffinity_np
780 [19156] math: [ldbl-128] j0l spurious underflows
781 [19164] nptl: tst-getcpu fails with many possible CPUs
782 [19168] math: math/test-ildoubl and math/test-ldouble failure
783 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
784 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
786 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
787 (FE_NOMASK_ENV) do not clear SSE exceptions
788 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
789 _int_new_arena/reused_arena
790 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
791 [19201] math: dbl-64 remainder incorrect sign of zero result
792 [19205] math: bits/math-finite.h conditions do not match math.h and
794 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
795 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
796 for C99-based standards
797 [19212] libc: features.h not -Wundef clean
798 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
800 [19214] libc: Family and model identification for AMD CPU's are incorrect.
801 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
802 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
804 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
806 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
808 [19242] libc: strtol incorrect in Turkish locales
809 [19243] malloc: reused_arena can pick an arena on the free list, leading
810 to an assertion failure and reference count corruption
811 [19253] time: tzset() ineffective when temporary TZ did not include DST
813 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
814 [19270] math: [hppa] Shared libm missing __isnanl
815 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
816 MAP_HUGETLB and MAP_STACK defines
817 [19313] nptl: Wrong __cpu_mask for x32
818 [19347] libc: grantpt: try to force a specific gid even without pt_chown
819 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
820 [19350] math: [ldbl-128ibm] sinhl spurious overflows
821 [19351] math: [ldbl-128ibm] logl inaccurate near 1
822 [19363] time: x32: times() return value wrongly truncates/sign extends
824 [19367] dynamic-link: Improve branch prediction on Silvermont
825 [19369] network: Default domain name not reset by res_ninit when "search"
826 / "domain" entry is removed from resolv.conf
827 [19375] math: powerpc: incorrect results for POWER7 logb with negative
829 [19385] localedata: bg_BG: time separator should be colon, not comma
830 [19408] libc: linux personality syscall wrapper may erroneously return an
831 error on 32-bit architectures
832 [19415] libc: dladdr returns wrong names on hppa
833 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
834 IBM905, IBM907, and IBM909
835 [19439] math: Unix98 isinf and isnan functions conflict with C++11
836 [19443] build: build failures with -DDEBUG
837 [19451] build: Make check fails on test-double-vlen2
838 [19462] libc: Glibc failed to build with -Os
839 [19465] math: Wrong code with -Os
840 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
842 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
844 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
845 [19486] math: S390: Math tests fail with "Exception Inexact set".
846 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
847 [19550] libc: [mips] mmap negative offset handling inconsistent with other
849 [19590] math: Fail to build shared objects that use libmvec.so functions.
853 * The following bugs are resolved with this release:
855 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
856 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
857 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
858 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
859 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
860 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
861 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
862 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
863 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
864 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
865 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
866 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
867 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
868 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
869 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
870 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
871 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
872 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
873 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
874 18657, 18676, 18694, 18696, 18887.
876 * Cache information can be queried via sysconf() function on s390 e.g. with
877 _SC_LEVEL1_ICACHE_SIZE as argument.
879 * A buffer overflow in gethostbyname_r and related functions performing DNS
880 requests has been fixed. If the NSS functions were called with a
881 misaligned buffer, the buffer length change due to pointer alignment was
882 not taken into account. This could result in application crashes or,
883 potentially arbitrary code execution, using crafted, but syntactically
884 valid DNS responses. (CVE-2015-1781)
886 * The time zone file parser has been made more robust against crafted time
887 zone files, avoiding heap buffer overflows related to the processing of
888 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
889 large time zone data files. Overly long time zone specifiers in the TZ
890 variable no longer result in stack overflows and crashes.
892 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
893 for LD and GD on x86 and x86-64, has been implemented. You will need
894 binutils-2.24 or later to enable this optimization.
896 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
897 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
898 Hat). These updates cause user visible changes, such as the fix for bug
901 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
902 and getXXbyYY NSS calls for the same database, causing a denial-of-service
903 condition in some applications.
905 * Added vector math library named libmvec with the following vectorized x86_64
906 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
908 The library can be disabled with --disable-mathvec. Use of the functions is
909 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
910 Shared library libmvec.so is linked in as needed when using -lm (no need to
911 specify -lmvec explicitly for not static builds).
912 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
914 * A new fmemopen implementation has been added with the goal of POSIX
915 compliance. The new implementation fixes the following long-standing
916 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
917 old implementation is still present for use be by existing binaries.
919 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
920 releases. It has been fixed to match 2.19 and older, but binaries built
921 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
923 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
924 Contributed by Roland McGrath (Google).
926 * The header <regexp.h> is deprecated, and will be removed in a future
927 release. Use of this header will trigger a deprecation warning.
928 Application developers should update their code to use <regex.h> instead.
930 This header was formerly part of SUS, but was deprecated in 1994 and
931 removed from the standard in 2001. Also, the glibc implementation
932 leaks memory. See BZ#18681 for more details.
936 * The following bugs are resolved with this release:
938 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
939 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
940 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
941 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
942 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
943 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
944 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
945 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
946 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
947 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
950 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
951 too little memory for the to-be-scanned arguments and overflow the
952 allocated buffer. The implementation now correctly computes the required
953 buffer size when using malloc, and switches to malloc from alloca as
956 * A new semaphore algorithm has been implemented in generic C code for all
957 machines. Previous custom assembly implementations of semaphore were
958 difficult to reason about or ensure that they were safe. The new version
959 of semaphore supports machines with 64-bit or 32-bit atomic operations.
960 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
961 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
963 * Port to Altera Nios II has been contributed by Mentor Graphics.
965 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
966 implementations for powerpc64/powerpc64le.
967 Implemented by Adhemerval Zanella (IBM).
969 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
970 and powerpc64le. This may improve lock scaling of existing programs on
971 HTM capable systems. The lock elision code is only enabled with
972 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
973 powerpc will issue a transaction abort on every syscall to avoid side
974 effects being visible outside transactions.
976 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
977 AArch64. Contributed by ARM Ltd.
979 * i386 memcpy functions optimized with SSE2 unaligned load/store.
981 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
982 under certain input conditions resulting in the execution of a shell for
983 command substitution when the application did not request it. The
984 implementation now checks WRDE_NOCMD immediately before executing the
985 shell and returns the error WRDE_CMDSUB as expected.
987 * CVE-2012-3406 printf-style functions could run into a stack overflow when
988 processing format strings with a large number of format specifiers.
990 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
991 infinite loop if the DNS response contained a PTR record of an unexpected
994 * The minimum GCC version that can be used to build this version of the GNU
995 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
996 still be used to compile programs using the GNU C Library.
998 * The GNU C Library is now built with -Werror by default. This can be
999 disabled by configuring with --disable-werror.
1001 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1003 * The obsolete sigvec function has been removed. This was the original
1004 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1005 programs have been using instead for about 25 years. Of course, ABI
1006 compatibility for old binaries using sigvec remains intact.
1008 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1009 with newer versions of bison.
1011 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1012 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1013 registers overlay two consecutive single-precision registers. MIPS32R2
1014 introduced a new FPU mode (FR=1) where double-precision registers extend the
1015 corresponding single-precision registers which is incompatible with the
1016 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1017 require the use of FR=1 making a transition necessary. New o32 ABI
1018 extensions enable users to migrate over time from the original o32 ABI
1019 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1020 tracks the ABI of any loaded object and verifies that new objects are
1021 compatible. Mode transitions will also be requested as required and
1022 unsupportable objects will be rejected. The ABI checks include both soft and
1023 hard float ABIs for o32, n32 and n64.
1025 GCC 5 with GNU binutils 2.25 onwards:
1026 It is strongly recommended that all o32 system libraries are built using the
1027 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1028 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1029 compiler using --with-fp-32=xx to set this by default.
1033 * The following bugs are resolved with this release:
1035 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1036 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1037 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1038 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1039 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1040 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1041 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1042 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1043 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1044 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1045 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1046 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1047 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1048 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1049 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1051 * Reverted change of ABI data structures for s390 and s390x:
1052 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1053 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1054 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1055 are preserved pointing straight to the same implementation as the old ones.
1056 Given that, new callers will simply provide a too-big buffer to these
1057 functions. Any applications/libraries out there that embed jmp_buf or
1058 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1059 against 2.19 headers will have to rebuilt again. This is necessary in any
1060 case to revert the breakage in their ABI caused by the glibc change.
1062 * Support for file description locks is added to systems running the
1063 Linux kernel. The standard file locking interfaces are extended to
1064 operate on file descriptions, not file descriptors, via the use of
1065 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1066 are associated with an open file instead of a process.
1068 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1070 * The minimum Linux kernel version that this version of the GNU C Library
1071 can be used with is 2.6.32.
1073 * Running the testsuite no longer terminates as soon as a test fails.
1074 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1075 with PASS or FAIL lines for individual tests. A summary of the results is
1076 printed, including a list of failing lists, and "make check" exits with
1077 error status if there were any unexpected failures. "make check
1078 stop-on-test-failure=y" may be used to keep the old behavior.
1080 * The am33 port, which had not worked for several years, has been removed
1083 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1084 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1085 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1086 conflicted with POSIX (support for which was removed in 2.19), the
1087 interfaces those macros enabled remain available when compiling with
1088 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1089 test macros defined.
1091 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1093 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1094 This may improve lock scaling of existing programs on TX capable systems.
1095 The lock elision code is only built with --enable-lock-elision=yes and
1096 then requires a GCC version supporting the TX builtins. With lock elision
1097 default mutexes are elided via __builtin_tbegin, if the cpu supports
1098 transactions. By default lock elision is not enabled and the elision code
1101 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1102 copy the path argument. This allowed programs to cause posix_spawn to
1103 deference a dangling pointer, or use an unexpected pathname argument if
1104 the string was modified after the posix_spawn_file_actions_addopen
1107 * All supported architectures now use the main glibc sysdeps directory
1108 instead of some being in a separate "ports" directory (which was
1109 distributed separately before glibc 2.17).
1111 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1112 On configurations that support it (all Linux configurations), it's now
1113 used regardless of the --enable-add-ons switch to configure. It is no
1114 longer possible to build such configurations without pthreads support.
1116 * Locale names, including those obtained from environment variables (LANG
1117 and the LC_* variables), are more tightly checked for proper syntax.
1118 setlocale will now fail (with EINVAL) for locale names that are overly
1119 long, contain slashes without starting with a slash, or contain ".." path
1120 components. (CVE-2014-0475) Previously, some valid locale names were
1121 silently replaced with the "C" locale when running in AT_SECURE mode
1122 (e.g., in a SUID program). This is no longer necessary because of the
1125 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1126 with application code using Intel MPX instructions. (With all previous
1127 versions, the MPX register state could be clobbered when making calls
1128 into or out of a shared library.) Note that while the new dynamic
1129 linker is compatible with all known x86 hardware whether or not it
1130 supports Intel MPX, some x86 instruction-set emulators might fail to
1131 handle the new instruction encodings. This is known to affect Valgrind
1132 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1133 release), and might affect other tools that do instruction emulation.
1135 * Support for loadable gconv transliteration modules has been removed.
1136 The support for transliteration modules has been non-functional for
1137 over a decade, and the removal is prompted by security defects. The
1138 normal gconv conversion modules are still supported. Transliteration
1139 with //TRANSLIT is still possible, and the //IGNORE specifier
1140 continues to be supported. (CVE-2014-5119)
1142 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1143 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1144 resulting a denial-of-service security vulnerability in applications which
1145 use functions related to iconv. (CVE-2014-6040)
1149 * The following bugs are resolved with this release:
1151 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1152 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1153 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1154 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1155 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1156 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1157 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1158 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1159 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1160 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1161 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1162 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1163 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1164 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1165 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1166 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1167 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1168 16431, 16453, 16474, 16506, 16510, 16529
1170 * Slovenian translations for glibc messages have been contributed by the
1171 Translation Project's Slovenian team of translators.
1173 * The public headers no longer use __unused nor __block. This change is to
1174 support compiling programs that are derived from BSD sources and use
1175 __unused internally, and to support compiling with Clang's -fblock
1176 extension which uses __block.
1178 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1179 large collation sequences to optimize multiple passes. This cache
1180 computation may overflow for large collation sequences and may cause a
1181 stack or buffer overflow. This is now fixed to use a slower algorithm
1182 which does not use a cache if there is an integer overflow.
1184 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1185 rules for large collation sequences to optimize multiple passes and falls
1186 back to alloca if malloc fails, resulting in a possible stack overflow.
1187 The implementation now falls back to an uncached collation sequence lookup
1190 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1191 initialized for static applications resulting in the security feature
1192 being disabled. The pointer guard is now correctly initialized to a
1193 random value for static applications. Existing static applications need
1194 to be recompiled to take advantage of the fix (bug 15754).
1196 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1197 to the d_name member of struct dirent, or omit the terminating NUL
1198 character. (Bugzilla #14699).
1200 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1201 aligned_alloc functions could allocate too few bytes or corrupt the
1202 heap when passed very large allocation size values (Bugzilla #15855,
1205 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1206 for AF_INET6 has been fixed (Bugzilla #16072).
1208 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1209 pap_CW, quz_PE, the_NP.
1211 * Substantially revised locales: gd_GB, ht_HT
1213 * The LC_ADDRESS field was updated to support country_car for almost all
1216 * ISO 1427 definitions were updated.
1218 * ISO 3166 definitions were updated.
1220 * The localedef utility now supports --big-endian and --little-endian
1221 command-line options to generate locales for a different system from that
1222 for which the C library was built.
1224 * Binary locale files now only depend on the endianness of the system for
1225 which they are generated and not on other properties of that system. As a
1226 consequence, binary files generated with new localedef may be incompatible
1227 with old versions of the GNU C Library, and binary files generated with
1228 old localedef may be incompatible with this version of the GNU C Library,
1229 in the following circumstances:
1231 + Locale files may be incompatible on m68k systems.
1233 + Locale archive files (but not separate files for individual locales) may
1234 be incompatible on systems where plain "char" is signed.
1236 * The configure option --disable-versioning has been removed. Builds with
1237 --disable-versioning had not worked for several years.
1239 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1240 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1242 * SystemTap probes for malloc have been introduced.
1244 * SystemTap probes for slow multiple precision fallback paths of
1245 transcendental functions have been introduced.
1247 * Support for powerpc64le has been added.
1249 * The soft-float powerpc port now supports e500 processors.
1251 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1253 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1254 set of header declarations that are enabled by default, even when other
1255 feature test macros or compiler options such as -std=c99 would otherwise
1256 disable some of those declarations.
1258 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1259 conflict with POSIX. The libbsd-compat library (which was a dummy library
1260 that did nothing) has also been removed.
1262 * Preliminary documentation about Multi-Thread, Async-Signal and
1263 Async-Cancel Safety has been added.
1265 * Change of ABI data structures for s390 and s390x:
1266 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1267 allow for future hardware extensions. All library functions that accept or
1268 return these structures were versioned in order to provide backwards
1269 compatibility with existing code. However, not all cases can be handled
1270 with interface versioning. If an application embeds either structure into
1271 another structure and that structure is passed to another compilation unit
1272 which expects the newer larger-sized object then any access to the new
1273 fields will result in undefined behaviour. Similarly any access to fields
1274 that were moved by the enlarging of the structures will cause undefined
1275 behaviour. To fix the undefined behaviour all objects that are part of the
1276 final in-memory image must agree on the size of structures, and this may
1277 require recompilation.
1281 * The following bugs are resolved with this release:
1283 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1284 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1285 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1286 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1287 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1288 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1289 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1290 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1291 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1292 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1293 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1294 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1295 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1298 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1299 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1300 Distributions can re-enable building and using pt_chown via the new configure
1301 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1302 considerable security risks and should only be used if the distribution
1303 understands and accepts the risks.
1305 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1308 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1309 fixed (Bugzilla #15330).
1311 * Add support for calling C++11 thread_local object destructors on thread
1312 and program exit. This needs compiler support for offloading C++11
1313 destructor calls to glibc.
1315 * Improved worst case performance of libm functions with double inputs and
1318 * Support for priority inherited mutexes in pthread condition variables on
1319 non-x86 architectures.
1321 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1323 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1325 * Optimized string functions for ARM. Implemented by Will Newton and
1328 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1330 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1333 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1334 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1336 * Added a benchmark framework to track performance of functions in glibc.
1338 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1339 It is based on draft TS 18661 and currently enabled as a GNU extension.
1341 * On Linux, the clock function now uses the clock_gettime system call
1342 for improved precision, rather than old times system call.
1344 * Added support for version-3 tz format files. This is needed when using
1345 the tz database release 2013e or later, and affects a few unusual cases --
1346 currently only TZ='America/Godthab' for time stamps after 2037.
1348 * Added new API functions pthread_getattr_default_np and
1349 pthread_setattr_default_np to get and set the default pthread
1350 attributes of a process.
1352 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1353 This may improve lock scaling of existing programs on TSX capable systems.
1354 When the --enable-lock-elision=yes parameter is specified at configure
1355 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1358 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1359 availability). Implemented by Ryan S. Arnold.
1361 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1365 * The following bugs are resolved with this release:
1367 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1368 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1369 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1370 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1371 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1372 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1373 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1374 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1375 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1376 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1377 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1378 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1379 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1380 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1381 14879, 14889, 14893, 14898, 14914.
1383 * Optimization of memcpy for MIPS.
1385 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1386 EMFILE has been fixed (Bugzilla #14889).
1388 * The add-on ports collection is now distributed in the "ports" subdirectory
1389 of the main GNU C Library distribution, rather than separately.
1391 * Port to ARM AArch64 contributed by Linaro.
1393 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1394 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1396 Implemented by Andreas Krebbel.
1398 * The new function secure_getenv allows secure access to the environment,
1399 returning NULL if running in a SUID/SGID process. This function replaces
1400 the internal function __secure_getenv.
1402 * SystemTap static probes have been added into the dynamic linker.
1403 Implemented by Gary Benson.
1405 * Optimizations of string functions strstr, strcasestr and memmem.
1406 Implemented by Maxim Kuvyrkov.
1408 * The minimum Linux kernel version that this version of the GNU C Library
1409 can be used with is 2.6.16.
1411 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1412 powerpc POWER7. Implemented by Will Schmidt.
1414 * New configure option --disable-nscd builds the C library such that it
1415 never attempts to contact the Name Service Caching Daemon (nscd).
1416 New configure option --disable-build-nscd avoids building nscd itself;
1417 this is the default if --disable-nscd is used.
1419 * Improved support for cross-compilation, including cross-testing and
1420 bootstrap builds without a previously built glibc.
1422 * Several testsuite tests are now able to test multiple IFUNC variants of an
1423 interface, rather than just testing the one that would be chooen by
1426 * New configure options --with-bugurl and --with-pkgversion, for
1427 distributors to use to embed their bug-reporting and package version
1428 information in --help and --version output.
1430 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1431 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1432 allows creation of chroots without the procfs mounted on /proc.
1434 * The `crypt' function now fails if passed salt bytes that violate the
1435 specification for those values. On Linux, the `crypt' function will
1436 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1437 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1438 when the mode is enabled.
1440 * The `clock_*' suite of functions (declared in <time.h>) is now available
1441 directly in the main C library. Previously it was necessary to link with
1442 -lrt to use these functions. This change has the effect that a
1443 single-threaded program that uses a function such as `clock_gettime' (and
1444 is not linked with -lrt) will no longer implicitly load the pthreads
1445 library at runtime and so will not suffer the overheads associated with
1446 multi-thread support in other code such as the C++ runtime library.
1448 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1453 * The following bugs are resolved with this release:
1455 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1456 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1457 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1458 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1459 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1460 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1461 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1462 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1463 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1464 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1465 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1466 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1467 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1468 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1469 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1470 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1471 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1472 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1473 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1474 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1475 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1476 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1479 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1480 configuring glibc with:
1481 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1482 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1483 Implemented by H.J. Lu.
1487 + define static_assert
1489 + do not declare gets
1491 + declare at_quick_exit and quick_exit also for ISO C11
1493 + aligned_alloc. NB: The code is deliberately allows the size parameter
1494 to not be a multiple of the alignment. This is a moronic requirement
1495 in the standard but it is only a requirement on the caller, not the
1498 + timespec_get added
1500 + uchar.h support added
1502 + CMPLX, CMPLXF, CMPLXL added
1504 Implemented by Ulrich Drepper.
1506 * Support for the IA-64 has been moved to ports.
1508 * Remove support for anything but ELF binary format
1510 * Checking versions of poll, ppoll added.
1511 Implemented by Ulrich Drepper.
1513 * More generic and 64-bit performance optimizations to math functions.
1514 Implemented by Ulrich Drepper.
1516 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1517 headers and functions available at compile time as they were before
1518 version 2.14. This option will be removed at some time in the future
1519 after the TI-RPC library becomes fully sufficient for the needs of
1520 existing applications.
1522 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1523 Note that glibc is not expected to work with any Linux kernel version
1526 * New header <sys/auxv.h> and function getauxval allowing easy access to
1527 the AT_* key-value pairs passed from the Linux kernel. The header also
1528 defines the HWCAP_* bits associated with the AT_HWCAP key.
1530 * New locales: mag_IN
1532 * New configure option --enable-systemtap builds SystemTap static probes
1533 into libc for setjmp and longjmp and into libpthread for various operations.
1534 So far the setjmp/longjmp probes and some of the libpthread probes are
1535 provided only for i*86 and x86_64.
1536 Implemented by Roland McGrath and Rayson Ho.
1538 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1540 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1543 * More optimized functions for SPARC. Implemented by David S. Miller.
1545 * Improved support for cross-compilation, especially bootstrap builds
1546 without a previously built glibc.
1548 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1549 Chris Metcalf from Tilera.
1551 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1552 now supported for ARM processors.
1554 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1555 as the name of the dynamic linker, to distinguish it from the
1556 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1558 * Support for CRIS has been removed from ports.
1560 * A new class of installed header has been documented for low-level
1561 platform-specific functionality. PowerPC added the first instance with a
1562 function to provide time base register access. Contributed by Tulio
1563 Magno Quites Machado Filho.
1565 * ix86 configurations now install header files that are consistent with
1566 what x86-64 configurations install. These same header files can be used
1567 for -m32, -m64, or -mx32 builds.
1568 Contributed by H.J. Lu.
1570 * Math library bug fixes. A thorough audit of all open math library bugs was
1571 conducted by Joseph Myers. Significant progress was made on many math
1572 library bugs resulting in more accurate exceptions and function results.
1573 Many thanks to all those that contributed including Andreas Jaeger for his
1574 patch review and work on the x87 trigonometric instruction issues.
1576 * Timezone data is no longer installed. Timezone-related binaries and scripts
1577 will continue to be installed. Users should obtain their timezone data from
1578 their distribution provider or from the tzdata package at
1579 <ftp://munnari.oz.au/pub/>.
1583 * The following bugs are resolved with this release:
1585 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1586 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1587 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1588 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1589 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1590 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1591 13484, 13506, 13515, 13523, 13524, 13538, 13540
1593 * New program pldd to list loaded object of a process
1594 Implemented by Ulrich Drepper.
1596 * Add nss_db support back to glibc. No more dependency on Berkeley db
1597 and support for initgroups lookups.
1598 Implemented by Ulrich Drepper.
1600 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1601 Contributed by HJ Lu.
1603 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1604 Contributed by HJ Lu.
1606 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1607 on x86-32 and x86-64.
1608 Contributed by Liubov Dmitrieva.
1610 * Optimized strchr and strrchr for SSE on x86-32.
1611 Contributed by Liubov Dmitrieva.
1613 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1614 for x86-64 and x86-32.
1615 Contributed by Liubov Dmitrieva.
1617 * New interfaces: scandirat, scandirat64
1618 Implemented by Ulrich Drepper.
1620 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1621 Implemented by Ulrich Drepper.
1623 * nscd now also caches the netgroup database.
1624 Implemented by Ulrich Drepper.
1626 * Integrate libm with gcc's -ffinite-math-only option.
1627 Implemented by Ulrich Drepper.
1629 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1630 to math functions. Implemented by Ulrich Drepper.
1632 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1633 Implemented by Ulrich Drepper.
1635 * New Linux interfaces: process_vm_readv, process_vm_writev
1637 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1638 Implemented by Ulrich Drepper.
1640 * Optimized nearbyint and strcasecmp for PPC.
1641 Implemented by Adhemerval Zanella.
1643 * New locales: bho_IN, unm_US, es_CU, ta_LK
1647 * The following bugs are resolved with this release:
1649 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1650 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1651 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1652 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1653 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1654 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1655 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1656 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1657 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1658 12795, 12811, 12813, 12814, 12841
1660 * The RPC implementation in libc is obsoleted. Old programs keep working
1661 but new programs cannot be linked with the routines in libc anymore.
1662 Programs in need of RPC functionality must be linked against TI-RPC.
1663 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1665 Visible changes of this change include (obviously) the inability to link
1666 programs using RPC functions without referencing the TI-RPC library and the
1667 removal of the RPC headers from the glibc headers.
1668 Implemented by Ulrich Drepper.
1670 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1671 syncfs, setns, sendmmsg
1673 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1674 yue_HK, lij_IT, mhr_RU
1676 * New encodings: CP770, CP771, CP772, CP773, CP774
1678 * New program sotruss to trace calls through PLTs
1679 Implemented by Ulrich Drepper.
1681 * The malloc hook implementation is marked deprecated and will be removed
1682 from the default implementation in the next version. The design never
1683 worked ever since the introduction of threads. Even programs which do
1684 not create threads themselves can use multiple threads created internally.
1688 * The following bugs are resolved with this release:
1690 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1691 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1692 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1693 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1696 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1698 * POWER7 optimizations: memset, memcmp, strncmp
1700 * New optimized string functions for x86-64: strnlen (SSE2),
1701 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1702 Implemented by Ulrich Drepper.
1706 * The following bugs are resolved with this release:
1708 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1709 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1710 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1711 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1712 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1713 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1714 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1715 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1717 * New interfaces: pthread_getname_np, pthread_setname_np
1719 * New Linux interface: recvmmsg
1721 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1723 * The dynamic linker now recognizes supported ABI versions from the
1724 EI_ABIVERSION field in the ELF header.
1725 Implemented by Ulrich Drepper.
1727 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1728 will not be used to fill in password fields in the passwd.byname replies.
1729 Instead it is used to synthesize the shadow.byname table, should it be
1730 missing. This is a useful mode in some installations involving Solaris.
1731 Implemented by Ulrich Drepper.
1733 * New locales: kok_IN, sq_MK, cv_RU
1737 * The following bugs are resolved with this release:
1739 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1740 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1741 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1742 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1743 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1744 10789, 10817, 10823, 10840, 10847
1746 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1748 Implemented by Ulrich Drepper.
1750 * Checking version of longjmp added that fails if an uninitialized stack
1751 frame would be created. Implemented by Ulrich Drepper.
1753 * STT_GNU_IFUNC is now supported in static executables.
1754 Implemented by H.J. Lu.
1756 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1758 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1759 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1760 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1761 Contributed by H.J. Lu.
1763 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1764 Implemented by Ulrich Drepper.
1766 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1768 Contributed by H.J. Lu.
1770 * Support for fma instruction in AVX on x86-64.
1771 Implemented by H.J. Lu and Ulrich Drepper.
1773 * AVX support in x86-64 auditing support in ld.so.
1774 Implemented by H.J. Lu.
1776 * STB_GNU_UNIQUE support added.
1777 Implemented by Ulrich Drepper.
1779 * Implement second fallback mode for optimized DNS lookup for even more
1780 broken environments. If two requests from the same port are not
1781 handled correctly close the socket and open a new one before sending
1782 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1783 can be used to select this mode right away, instead of rediscovering the
1784 necessity is every process again.
1785 Implemented by Ulrich Drepper.
1787 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1788 Implemented by Adam Tkac.
1790 * Optimized iconv conversions for S390x.
1791 Implemented by Andreas Krebbel.
1793 * Using condvars with PI mutexes is now more efficient due to kernel
1794 support for requeueing to PI futexes. NPTL support added for x86-64.
1795 Implemented by Ulrich Drepper.
1797 * New locales: ps_AF, my_MM
1801 * The following bugs are resolved with this release:
1803 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1804 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1805 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1806 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1807 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1809 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1810 Implemented by Ulrich Drepper.
1812 * New Linux interfaces: accept4, fallocate, fallocate64.
1813 Implemented by Ulrich Drepper.
1815 * Correct declarations of string function when used in C++ code. This
1816 could lead to compile errors for invalid C++ code.
1818 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1821 * New POSIX 2008 interface: psiginfo
1822 Implemented by Ulrich Drepper.
1824 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1825 Implemented by Ulrich Drepper.
1827 * Support for selecting between multiple function definitions at runtime
1828 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1830 * The libcrypt library can now use the hash function implementations in
1831 NSS. Implemented by Ulrich Drepper.
1833 * The malloc implementation can be compiled to be less memory efficient
1834 but higher performing in multi-threaded programs.
1835 Implemented by Ulrich Drepper.
1837 * New locales: nan_TW@latin, ks_IN
1839 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1840 Implemented by Ulrich Drepper.
1842 * Extended printf hook support. It is possible to use user-defined types
1843 and extend existing format specifiers.
1844 Implemented by Ulrich Drepper.
1846 * Handling for group shadow files has been added.
1847 Implemented by Ulrich Drepper.
1849 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1850 servers (the case, e.g., for some people using the built-in DNS
1851 server in ADSL modems/routers). There is a once-per-process timeout
1852 in case of a broken server. To avoid it, users can run nscd or put
1853 'options single-request' in /etc/resolv.conf.
1854 Implemented by Ulrich Drepper.
1858 * The following bugs are resolved with this release:
1860 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1861 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1862 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1863 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1864 6968, 6974, 6980, 6995, 7008, 7009, 7029
1866 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1867 up at the same time. Implemented by Ulrich Drepper.
1869 * TLS descriptors for LD and GD on x86 and x86-64.
1870 Implemented by Alexandre Oliva.
1872 * getaddrinfo now handles DCCP and UDPlite.
1873 Implemented by Ulrich Drepper.
1875 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1876 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1877 Implemented by Ulrich Drepper.
1879 * New implementation of memmem, strstr, and strcasestr which is O(n).
1880 Implemented by Eric Blake.
1882 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1884 * Implement "e" option for popen to open file descriptor with the
1885 close-on-exec flag set. Implemented by Ulrich Drepper.
1887 * Implement "b" mode for fmemopen. In this mode writes writes don't
1888 implicitly add a NUL byte and seeks from the end of the buffer really
1889 use the buffer end, not the string length as the basis.
1890 Implemented by Ulrich Drepper.
1892 * Many functions, exported and internal, now atomically set the close-on-exec
1893 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1895 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1897 Implemented by Pravin Satpute.
1899 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1903 * The following bugs are resolved with this release:
1905 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1906 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1907 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1908 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1909 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1910 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1911 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1913 * New locales: bo_CN, bo_IN, shs_CA.
1915 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1917 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1918 Implemented by Pravin Satpute.
1920 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1922 * nscd caches now all timeouts for DNS entries
1923 Implemented by Ulrich Drepper.
1925 * nscd is more efficient and wakes up less often.
1926 Implemented by Ulrich Drepper.
1928 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1929 vdprintf, and obstack_vprintf.
1930 Implemented by Jakub Jelinek.
1932 * Faster memset for x86-64.
1933 Implemented by Harsha Jagasia and H.J. Lu.
1935 * Faster memcpy on x86.
1936 Implemented by Ulrich Drepper.
1938 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1939 Implemented by Ulrich Drepper.
1941 * Faster sqrt and sqrtf implemention for some PPC variants.
1942 Implemented by Steven Munroe.
1946 * The following bugs are resolved with this release:
1948 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1949 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1950 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1951 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1952 5071, 5103, 5104, 5112, 5113, 5184, 5186
1954 * More checking functions: fread, fread_unlocked, open*, mq_open.
1955 Implemented by Jakub Jelinek and Ulrich Drepper.
1957 * Extend fortification to C++. Implemented by Jakub Jelinek.
1959 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1960 by not recognizing 'a' as a modifier when those specs are requested.
1961 Implemented by Jakub Jelinek.
1963 * PPC optimizations to math and string functions.
1964 Implemented by Steven Munroe.
1966 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1967 options to be passed. Implemented by Ulrich Drepper.
1969 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1971 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1972 Implemented by Ulrich Drepper.
1974 * Handle private futexes in the NPTL implementation.
1975 Implemented by Jakub Jelinek and Ulrich Drepper.
1977 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1978 Implemented by Roland McGrath and Ulrich Drepper.
1980 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1982 * SHA-256 and SHA-512 based password encryption.
1983 Implemented by Ulrich Drepper.
1985 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1986 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1989 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1990 Implemented by Ulrich Drepper.
1994 * The following bugs are resolved with this release:
1996 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1997 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1998 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1999 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2000 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2001 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2002 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2005 * New Linux interfaces: epoll_pwait, sched_getcpu.
2007 * New generic interfaces: strerror_l.
2009 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2013 * The following bugs are resolved with this release:
2015 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2016 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2017 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2018 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2019 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2020 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2021 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2022 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2023 3225, 3251, 3252, 3253, 3273
2025 * For Linux, the sorting of addresses returned by getaddrinfo now also
2026 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2027 Implemented by Ulrich Drepper.
2029 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2030 Implemented by Ulrich Drepper.
2032 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2034 * New iconv module for MIK. Contributed by Alexander Shopov.
2036 * For sites with broken group and/or passwd database, the auto-propagate
2037 option of nscd can prevent creating ID lookup entries from the results
2038 of a name lookup and vice versa. This usually is no problem but some
2039 site might have problems with the default behavior.
2040 Implemented by Ulrich Drepper.
2042 * Iterating over entire database in NIS can be slow. With the
2043 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2044 to trade time for memory. The entire database will be read at once.
2045 Implemented by Ulrich Drepper.
2047 * The interfaces introduced in RFC 3542 have been implemented by
2050 * Support for the new ELF hash table format was added by Ulrich Drepper.
2052 * Support for priority inheritance mutexes added by Jakub Jelinek and
2055 * Support for priority protected mutexes added by Jakub Jelinek.
2057 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2058 or_IN, csb_PL, fy_NL, sr_ME.
2062 * More overflow detection functions.
2064 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2065 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2067 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2068 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2069 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2070 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2071 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2072 by Masahide Washizawa.
2074 * It is now possible to install audit libraries for the dynamic linker using
2075 LD_AUDIT. Implemented by Ulrich Drepper.
2077 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2078 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2079 For a libc and libpthread that works well on Linux 2.4 kernels, we
2080 recommend using the stable 2.3 branch.
2082 * The new function open_wmemstream acts like open_memstream,
2083 but uses a wchar_t wide character buffer.
2085 * The new function ppoll is an improved version of poll, similar to pselect.
2087 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2088 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2089 renameat, unlinkat, linkat, symlinkat, readlinkat.
2091 * New Linux kernel system calls: unshare,
2092 inotify_init, inotify_add_watch, inotify_rm_watch.
2094 * The euidaccess function is now also known by the alias eaccess,
2095 for compatibility with some other systems.
2097 * Timezone data updated to 2006b version.
2101 * The following bugs are resolved with this release:
2103 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2104 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2105 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2106 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2107 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2108 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2110 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2112 * As of this release, GCC 4 can be used to compile the C Library.
2114 * Timezone data updated to 2005m version.
2118 * The following bugs are resolved with this release:
2120 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2121 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2122 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2123 777, 787, 821, 822, 823, 825
2125 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2129 * Support for RFC 3678. Real implementations exist only for Linux so far.
2130 Implemented by Ulrich Drepper.
2132 * nscd can now cache entries persistently. Expiring entries are reloaded.
2133 For speedups the cache can be shared in memory with client processes.
2134 Implemented by Ulrich Drepper.
2136 * nscd can now perform SELinux checks.
2137 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2139 * getaddrinfo queries are now cached. Canonical name lookup is performed
2141 Implemented by Ulrich Drepper.
2143 * The nothrow function attribute is used when headers are used by gcc when
2144 compiling C code. This can avoid significant amounts of exception
2147 * The malloc functions perform more error checking and are stricter when
2148 it comes to reacting on errors. The default action is to terminate
2149 the process after showing an error message. Implemented by Ulrich Drepper.
2151 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2152 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2154 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2155 namespaces using the new function dlmopen(). This feature is of course,
2156 like most other dynamic loading functionality, not available in statically
2157 linked applications. Implemented by Ulrich Drepper.
2159 * Low-overhead boundary checking variants of string and some stdio functions
2160 were added. These are to be used in conjunction with a gcc patch by
2161 Jakub Jelinek which adds calls to these functions if possible.
2162 Implemented by Jakub Jelinek and Ulrich Drepper.
2164 * Old code for several operating systems and machine architectures that
2165 have not been in working condition in a long time have been removed from
2166 the main source tree maintained by the GNU C Library's maintainers.
2167 These files are now reside in the separate `ports' source module
2168 that is usable as an add-on when building the library.
2172 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2173 interrogate the dynamic linker, compatible with the Solaris interface.
2175 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2176 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2178 * getifaddrs now uses the netlink interface on Linux to get its information.
2179 Implemented by Thorsten Kukuk.
2181 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2182 Implemented by Ulrich Drepper.
2184 * support for non-executable stacks on x86 has been added. Changes mostly
2187 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2190 * getaddrinfo now performs destination address selection according to
2195 * Thread-safe interfaces for many functions that access locale data
2196 were added in version 2.3, but these features were omitted from NEWS.
2197 Many functions have variants with an `_l' suffix that take a `locale_t'
2198 object as a parameter rather than consulting the current locale.
2199 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2200 create and maintain `locale_t' objects. Additionally, the new function
2201 `uselocale' sets "the current locale" (as used by functions not so
2202 parameterized) set for an individual thread. These features were added
2203 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2205 * The functions getresuid, getresgid, setresuid, and setresgid, which
2206 have long been available on Linux, are now declared in <unistd.h>
2207 and are now also available on the Hurd.
2209 * ELF thread-local storage support (TLS) now works on x86-64.
2211 * The new dynamic string token $LIB is expanded in shared library names.
2212 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2214 * Aldy Hernandez contributed complete software floating point support for
2215 PowerPC machines with no FPU.
2217 * fexecve is implemented on Linux.
2219 * The `btowc' function should work at least twice as fast due to
2220 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2222 * With approriate thread add-ons cancelable functions are now implemented
2223 in libc.so as well. No need to call the function in libpthread. This
2224 change allowed to finally disable the incorrect and expensive handling
2225 of weak definition in ld.so.
2227 * Yet more PLT entries in libc.so have been removed. We finally arrived
2228 at the bare minimum. Startup times improved appropriately.
2230 * Support for the new Linux/x86 system call interface was added. The
2231 AT_SYSINFO auxiliary vector entry is recognized and handled.
2235 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2238 * iconv (the program and the interface) now accepts empty names (excluding
2239 options like //TRANSLIT) to mean "use charset of current locale".
2241 * localedef can now transliterate characters in strings which are not in
2242 the provided charmap. The information from the input locale is used.
2244 * Prelinking support was added for ELF targets. This requires additional
2245 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2247 * Read-only stdio streams now use mmap to speed up operation by eliminating
2248 copying and buffer underflows. To use add 'm' to the mode string of
2249 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2251 * The malloc functions were completely rewritten by Wolfram Gloger based
2252 on Doug Lea's malloc-2.7.0.c.
2254 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2255 implementation of regex.
2257 * Bruno Haible upgraded the iconv and locale implementation to support
2260 * Contents of the LC_* and LANG environment variables in the CEN style are
2261 not recognized anymore. It never was used. Change by Ulrich Drepper.
2263 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2264 thread-local storage (TLS) ABI on some platforms.
2265 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2267 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2268 EUC-JISX0213, and TSCII.
2270 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2271 BSD-compatible interface for getting all network interface addresses.
2272 Implementation for IPv4 by Roland McGrath.
2274 * Loading of locale data is faster due to the introduction of a locale
2275 archive. Implemented by Roland McGrath and Ulrich Drepper.
2277 * Startup times are significantly reduced by not using exported functions
2278 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2281 * Steven Munroe contributed a port to PowerPC64/Linux.
2285 * The Hurd now uses the GNU libio implementation of stdio rather than the
2286 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2288 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2289 with the same behavior as the Linux system call of the same name.
2293 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2294 128-bit long double format.
2296 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2297 IBM1161, and IBM1162 charsets.
2299 * Andreas Jaeger contributed a port to x86-64/Linux.
2301 * Peter Bruin contributed a port to PowerPC/Hurd.
2303 * libc functions using I/O streams now can handle wide-oriented streams
2306 * optimizations in the dynamic linker. Binaries created by recent binutils
2307 versions start up quicker due to reduced time spent on relocations.
2309 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2313 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2314 asinh, atanh, j0 for the 128-bit long double format.
2316 * Bruno Haible updated all the code handling Unicode in some form to
2317 support Unicode 3.1.
2319 * Speed of regex for single-byte locales is back to previous levels.
2320 Patch by Isamu Hasegawa.
2322 * Alpha, SPARC, and IA-64 now also using floating stacks.
2324 * Startup time of internationalized applications greatly improved through
2325 iconv cache. Use iconvconfig to generate the cache file.
2326 Contributed by Ulrich Drepper.
2328 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2329 severe performance problems. Patch by David Mosberger.
2331 * The Hurd port got a lot more functionality like AIO, various stdio
2332 extensions, etc. Mainly done by Roland McGrath.
2334 * mtrace can now lookup symbols in shared libraries.
2338 * Intel's IA-64 math library is largely integrated. It provides fast and
2339 accurate implementatations for most basic and standard math functions
2340 in float, double, and long double format.
2342 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2343 and asin for the 96-bit long double format and asin, log, tan for the
2344 128-bit long double format.
2346 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2347 The basic double functions exist today. Contributed by Abraham Ziv
2348 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2349 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2351 * An asynchronous name lookup library was added. The interface is designed
2352 after POSIX AIO. The proposal was circulated beforehand to get comments.
2353 No negative ones came in. Implemented by Ulrich Drepper.
2355 * Port to S390/64bit contributed by Martin Schwidefsky
2356 <schwidefsky@de.ibm.com>.
2358 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2359 of functions for Linux/IA-64.
2361 * The RPC code is now thread safe. Threads can now use the same service
2362 of different services at the same time. Patch by Eric Norum
2363 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2365 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2366 family of functions for Linux/S390.
2368 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2369 of functions for Linux/x86.
2371 * Port to Linux/CRIS contributed by Axis Communications.
2375 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2376 we can now check for namespace violations and missing declarations. The
2377 result is that almost all headers are now Unix-compliant (as defined in
2378 the upcoming XPG6). The negative side is that some programs might need
2379 corrections, too, if they depend on the incorrect form of the headers in
2380 previous versions which defined too many symbols and included too many
2383 * regex now handles multibyte character sets correctly.
2384 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2386 * iconv (the program) does now conform to the upcoming XPG6 and handles
2387 charmaps. Instead of the charset names the path of charmaps can be
2388 provided and the conversion happens based on this data.
2389 Contributed by Ulrich Drepper.
2391 * The locale program now provides detailed information about the installed
2396 only lists the names of the supported locales
2400 provides details such as country, language, and codeset name.
2401 Contributed by Ulrich Drepper.
2405 * The gencat program now parses the input file according to the charset
2406 selected by the LC_CTYPE category. This is important for stateful
2407 character sets. To make generating catalogs easier there is a way
2408 to overwrite the charset selected by the locale: before the first
2409 message or $ quote line the catalog can contain a line like
2411 $ codeset=ISO-8859-2
2413 to select the charset (ISO-8859-2 in this case).
2415 Implemented by Shinya Hanataka and Ulrich Drepper.
2417 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2418 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2419 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2421 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2422 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2424 * The LANGUAGE environment variable is now ignored unless the locale is
2425 changed from the default "C" locale.
2427 * The usual bug fixes.
2431 * Greg McGary added runtime support for bounds checking using gcc's
2432 new -fbounded-pointers option. ix86 target is complete. PowerPC
2435 * Thorsten Kukuk added secure mode support to nscd.
2437 * The Berkeley db libraries have been removed.
2439 Related, the nss_db module is now in a separate package since it
2440 obviously requires a database library being available.
2442 * Wide character I/O streams implemented by Ulrich Drepper.
2444 * Functions from the extended socket API added by Ulrich Drepper.
2446 * Functions feenableexcept and fedisableexcept to control the
2447 behaviour of individual exceptions have been added by Andreas Jaeger.
2449 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2451 * The resolver code has been updated from bind 8.2.3-T5B which supports
2452 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2455 This change could in some situations effect backward compatibility. Since
2456 now `_res' is a thread-local instead of a global variable, modifying it
2457 in one thread does not have any effect in other threads.
2459 The resolver library was also extended to allow IPv6 as the transport
2460 protocol for the requests. This work was done by Stig Venaas.
2462 * Compatibility code for K&R C compilers has been removed from the
2463 header files. A ISO C compiler is needed to use the library
2464 (conforming to either C89 or C99 standard).
2466 * Complete rewrite of the localedef program to support multibyte character
2467 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2468 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2469 Implemented by Ulrich Drepper.
2471 Bruno Haible significantly improved the generation and use of the data
2472 structures for the wide character tables.
2474 * Plural handling in gettext implemented by Ulrich Drepper.
2476 * The utmp daemon has been removed.
2478 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2480 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2483 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2485 * POSIX barriers implemented by Kaz Kylheku.
2487 * POSIX spawn function family implemented by Ulrich Drepper.
2489 * POSIX spinlocks are now available.
2491 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2493 * the configure option --enable-kernel=X.Y.Z allows to strip out
2494 compatibility for kernel versions before X.Y.Z. This is currently only
2495 implemented for Linux.
2497 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2498 field sin6_scope_id. This means that all programs using IPv6 should be
2499 recompiled. Don't expect binary compatibility with previous glibc
2502 * various conversion modules for IBM character sets contributed by
2505 * IA-64 port by Jes Sorensen and HJ Lu.
2519 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2521 * New xdr functions are added; some rpc functions are now 64bit clean.
2523 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2525 * Fixed known incompatibilities with glibc 2.0.
2527 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2529 * Optimized a number of functions (especially the ELF dynamic loader).
2531 * Update timezone data files.
2533 * lots of charmaps corrections
2535 * some new locale definitions and charmaps
2540 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2541 conform to POSIX member type requirements. Symbol versions have been
2542 adjusted as needed within the library, and for direct use by applications,
2543 but there is potential for problems if third-party libraries use
2544 struct timeval as part of their interface. This does not present
2545 a problem for X and other "essential" system libraries.
2547 * An additional locale model to support C++ Standard Library locale
2548 model and probably more was implemented by Ulrich Drepper.
2550 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2553 * Miles Bader provided the `argp' function family to support hierachical
2554 command line argument parsing, layered on top of getopt.
2556 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2558 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2561 * scanf recognizes the %a and %A format for scanning floating point numbers.
2563 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2564 information and interfaces for the available integer types.
2566 * about 130 new math functions were added to implement the ISO C9x math
2569 * the new header <complex.h> contains definitions of the complex math
2570 functions from ISO C 9X.
2572 * the new header <tgmath.h> defines generic macros to use complex or
2573 real valued functions.
2575 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2577 * Andreas Jaeger provided a test suite for the math library.
2579 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2581 * Ulrich Drepper added character set conversion functions (iconv).
2583 * Optimized string functions have been added.
2585 * The localedata addon is now part of glibc.
2587 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2589 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2590 daemon for NSS (nscd).
2592 Missing a better place here are some numbers on improvements. Under
2593 Linux 2.1.125 un-tar-ing the kernel sources takes
2597 using local files 12.19s 6.88s 22.91s
2599 using NIS 13.92s 8.91s 26.34s
2601 using NIS & nscd 10.37s 7.34s 25.30s
2603 using NIS+ 27.57s 30.37s 640.46s
2605 using NIS+ & nscd 10.25s 7.83s 26.51s
2607 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2609 Keep in mind that non-namelookup related operations dominate above times.
2610 It was just a common complain that using NIS+ unpacking the kernel is
2613 [1] The old nscd implementation is not available anymore since it was
2614 distributed with glibc up to version 2.0.98 and thus is now replaced.
2616 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2618 * Mark Kettenis provided a Hesiod NSS module.
2620 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2621 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2623 * rcmd can now handle netgroups (Dick Streefland).
2625 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2628 * Support for the IPv6 protocol has been added to the socket API, as per the
2629 latest draft standards.
2631 * Support for Linux 2.2 has been added.
2633 * Interface changes relative to the latest 2.0.x release:
2634 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2635 addseverity NEW: Unix98
2636 alphasort64 NEW: LFS
2637 argp_err_exit_status NEW: argp, GNU ext
2638 argp_error NEW: argp, GNU ext
2639 argp_failure NEW: argp, GNU ext
2640 argp_help NEW: argp, GNU ext
2641 argp_parse NEW: argp, GNU ext
2642 argp_program_bug_address NEW: argp, GNU ext
2643 argp_program_version NEW: argp, GNU ext
2644 argp_program_version_hook NEW: argp, GNU ext
2645 argp_state_help NEW: argp, GNU ext
2646 argp_usage NEW: argp, GNU ext
2647 authdes_create NEW: Secure RPC
2648 authdes_getucred NEW: Secure RPC
2649 authdes_pk_create NEW: Secure RPC
2650 backtrace NEW: GNU ext.
2651 backtrace_symbols NEW: GNU ext.
2652 backtrace_symbols_fd NEW: GNU ext.
2654 cacosf NEW: ISO C 9x
2655 cacosh NEW: ISO C 9x
2656 cacoshf NEW: ISO C 9x
2657 cacoshl NEW: ISO C 9x
2658 cacosl NEW: ISO C 9x
2665 casinf NEW: ISO C 9x
2666 casinh NEW: ISO C 9x
2667 casinhf NEW: ISO C 9x
2668 casinhl NEW: ISO C 9x
2669 casinl NEW: ISO C 9x
2671 catanf NEW: ISO C 9x
2672 catanh NEW: ISO C 9x
2673 catanhf NEW: ISO C 9x
2674 catanhl NEW: ISO C 9x
2675 catanl NEW: ISO C 9x
2676 cbc_crypt NEW: Secure RPC
2680 ccoshf NEW: ISO C 9x
2681 ccoshl NEW: ISO C 9x
2687 cimagf NEW: ISO C 9x
2688 cimagl NEW: ISO C 9x
2689 clearerr_locked REMOVED
2690 clntunix_create NEW: sunrpc ext
2692 clog10 NEW: ISO C 9x
2693 clog10f NEW: ISO C 9x
2694 clog10l NEW: ISO C 9x
2704 cprojf NEW: ISO C 9x
2705 cprojl NEW: ISO C 9x
2707 crealf NEW: ISO C 9x
2708 creall NEW: ISO C 9x
2713 csinhf NEW: ISO C 9x
2714 csinhl NEW: ISO C 9x
2717 csqrtf NEW: ISO C 9x
2718 csqrtl NEW: ISO C 9x
2722 ctanhf NEW: ISO C 9x
2723 ctanhl NEW: ISO C 9x
2725 des_setparity NEW: Secure RPC
2726 ecb_crypt NEW: Secure RPC
2727 endutxent NEW: Unix98
2729 exp10f NEW: ISO C 9x
2730 exp10l NEW: ISO C 9x
2734 fattach NEW: STREAMS
2735 fdetach NEW: STREAMS
2739 feclearexcept NEW: ISO C 9x
2740 fegetenv NEW: ISO C 9x
2741 fegetexceptflag NEW: ISO C 9x
2742 fegetround NEW: ISO C 9x
2743 feholdexcept NEW: ISO C 9x
2745 feraiseexcept NEW: ISO C 9x
2746 ferror_locked REMOVED
2747 fesetenv NEW: ISO C 9x
2748 fesetexceptflag NEW: ISO C 9x
2749 fesetround NEW: ISO C 9x
2750 fetestexcept NEW: ISO C 9x
2751 feupdateenv NEW: ISO C 9x
2752 fflush_locked REMOVED
2756 fgets_unlocked NEW: GNU ext.
2757 fileno_locked REMOVED
2769 fputc_locked REMOVED
2770 fputs_unlocked NEW: GNU ext.
2771 fread_unlocked NEW: GNU ext.
2776 fstatvfs NEW: Unix98
2780 ftruncate64 NEW: LFS
2782 fwrite_unlocked NEW: GNU ext.
2783 gai_strerror NEW: IPv6
2787 getchar_locked REMOVED
2789 getdate_err NEW: Unix98
2790 getdate_r NEW: GNU ext.
2792 getnameinfo NEW: IPv6
2793 getnetname NEW: Secure RPC
2794 getpmsg NEW: STREAMS
2795 getpt NEW: Unix98 PTY
2796 getrlimit64 NEW: LFS
2797 getutxent NEW: Unix98
2798 getutxid NEW: Unix98
2799 getutxline NEW: Unix98
2800 glob64 NEW: GNU ext.
2801 globfree64 NEW: GNU ext.
2802 gnu_get_libc_release NEW: GNU ext.
2803 gnu_get_libc_version NEW: GNU ext.
2804 grantpt NEW: Unix98 PTY
2805 host2netname NEW: Secure RPC
2807 iconv_close NEW: iconv
2808 iconv_open NEW: iconv
2809 if_freenameindex NEW: IPv6
2810 if_indextoname NEW: IPv6
2811 if_nameindex NEW: IPv6
2812 if_nametoindex NEW: IPv6
2813 in6addr_any NEW: IPv6
2814 in6addr_loopback NEW: IPv6
2815 inet6_isipv4mapped NEW: IPv6
2816 isastream NEW: STREAMS
2817 iswblank NEW: GNU ext.
2818 key_decryptsession NEW: Secure RPC
2819 key_decryptsession_pk NEW: Secure RPC
2820 key_encryptsession NEW: Secure RPC
2821 key_encryptsession_pk NEW: Secure RPC
2822 key_gendes NEW: Secure RPC
2823 key_get_conv NEW: Secure RPC
2824 key_secretkey_is_set NEW: Secure RPC
2825 key_setnet NEW: Secure RPC
2826 key_setsecret NEW: Secure RPC
2827 llrint NEW: ISO C 9x
2828 llrintf NEW: ISO C 9x
2829 llrintl NEW: ISO C 9x
2830 llround NEW: ISO C 9x
2831 llroundf NEW: ISO C 9x
2832 llroundl NEW: ISO C 9x
2837 lrintf NEW: ISO C 9x
2838 lrintl NEW: ISO C 9x
2839 lround NEW: ISO C 9x
2840 lroundf NEW: ISO C 9x
2841 lroundl NEW: ISO C 9x
2843 makecontext NEW: Unix98
2844 mempcpy NEW: GNU ext.
2847 modify_ldt NEW: kernel
2851 nearbyint NEW: ISO C 9x
2852 nearbyintf NEW: ISO C 9x
2853 nearbyintl NEW: ISO C 9x
2854 netname2host NEW: Secure RPC
2855 netname2user NEW: Secure RPC
2856 nexttoward NEW: ISO C 9x
2857 nexttowardf NEW: ISO C 9x
2858 nexttowardl NEW: ISO C 9x
2862 passwd2des NEW: Secure RPC
2864 pow10f NEW: GNU ext.
2865 pow10l NEW: GNU ext.
2868 printf_size NEW: GNU ext.
2869 printf_size_info NEW: GNU ext.
2870 profil_counter REMOVED
2871 pthread_mutexattr_getkind_np REPLACED
2872 pthread_mutexattr_setkind_np REPLACED
2873 ptsname NEW: Unix98 PTY
2874 ptsname_r NEW: Unix98 PTY
2876 putchar_locked REMOVED
2877 putgrent NEW: GNU ext.
2879 putpmsg NEW: STREAMS
2880 pututxline NEW: Unix98
2884 readdir64_r NEW: LFS
2885 remquo NEW: ISO C 9x
2886 remquof NEW: ISO C 9x
2887 remquol NEW: ISO C 9x
2889 roundf NEW: ISO C 9x
2890 roundl NEW: ISO C 9x
2892 scalbln NEW: ISO C 9x
2893 scalblnf NEW: ISO C 9x
2894 scalblnl NEW: ISO C 9x
2896 sendfile NEW: kernel
2897 setcontext NEW: Unix98
2898 setrlimit64 NEW: LFS
2899 setutxent NEW: Unix98
2901 sigignore NEW: Unix98
2902 sigqueue NEW: POSIX.1b
2903 sigrelse NEW: Unix98
2904 sigset NEW: POSIX.1b
2905 sigtimedwait NEW: POSIX.1b
2906 sigwaitinfo NEW: POSIX.1b
2907 sincos NEW: GNU ext.
2908 sincosf NEW: GNU ext.
2909 sincosl NEW: GNU ext.
2913 strcasestr NEW: GNU ext.
2914 strtoimax NEW: ISO C 9x
2915 strtoumax NEW: ISO C 9x
2916 strverscmp NEW: GNU ext.
2917 svcauthdes_stats NEW: Secure RPC
2918 svcunix_create NEW: sunrpc etx
2919 svcunixfd_create NEW: sunrpc ext
2920 swapcontext NEW: Unix98
2921 tcgetsid NEW: Unix98 PTY
2922 tdestroy NEW: GNU ext.
2923 tgamma NEW: ISO C 9x
2924 tgammaf NEW: ISO C 9x
2925 tgammal NEW: ISO C 9x
2929 truncf NEW: ISO C 9x
2930 truncl NEW: ISO C 9x
2932 unlockpt NEW: Unix98 PTY
2933 updwtmpx NEW: Unix98
2934 user2netname NEW: Secure RPC
2935 utmpxname NEW: Unix98
2936 versionsort NEW: GNU ext.
2937 versionsort64 NEW: GNU ext.
2939 wcscasecmp NEW: GNU ext.
2940 wcsncasecmp NEW: GNU ext.
2941 wcsnlen NEW: GNU ext.
2942 wcstoimax NEW: ISO C 9x
2943 wcstoll NEW: ISO C 9x
2944 wcstoull NEW: ISO C 9x
2945 wcstoumax NEW: ISO C 9x
2947 wordexp NEW: POSIX.2
2948 wordfree NEW: POSIX.2
2949 write_profiling REMOVED
2950 xdecrypt NEW: Secure RPC
2951 xdr_authdes_cred NEW: Secure RPC
2952 xdr_authdes_verf NEW: Secure RPC
2953 xdr_cryptkeyarg NEW: Secure RPC
2954 xdr_cryptkeyarg2 NEW: Secure RPC
2955 xdr_cryptkeyres NEW: Secure RPC
2956 xdr_getcredres NEW: Secure RPC
2957 xdr_key_netstarg NEW: Secure RPC
2958 xdr_key_netstres NEW: Secure RPC
2959 xdr_keybuf NEW: Secure RPC
2960 xdr_keystatus NEW: Secure RPC
2961 xdr_netnamestr NEW: Secure RPC
2962 xdr_sizeof NEW: Secure RPC
2963 xdr_unixcred NEW: sunrpc ext
2964 xencrypt NEW: Secure RPC
2965 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2976 * inet_ntoa is thread-safe
2978 * updwtmp is moved from libutil to libc
2980 * rewrite of cbrt function
2982 * update of timezone data
2996 * add atoll function
2998 * fix complex problems in Berkeley DB code
3000 * fix math functions
3004 * fixed lots of header problems (especially Linux/GNU specific)
3006 * dynamic loader preserves all registers
3008 * Roland McGrath provided support for handling of auxiliary objects in
3009 the ELF dynamic loader.
3011 * support for parallel builds is improved
3015 * GNU extensions are no longer declared by default. To enable them you
3016 must define the macro `_GNU_SOURCE' in your program or compile with
3019 * The library has changed from using GNU ld symbol aliases to using weak
3020 symbols where available. The ELF object file format supports weak
3021 symbols; GNU ld also supports weak symbols in the a.out format. (There
3022 is also now support for other GNU ld extensions in ELF. Use the
3023 `--with-elf' option to configure to indicate you have ELF, and
3024 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3025 of many files which contained only symbol aliases, reducing the size of
3026 the source and the compiled library; many other files were renamed to
3027 less cryptic names previously occupied by the symbol alias files.
3028 There is a new header file <elf.h> for programs which operate on
3029 files in the ELF format.
3031 * Converted to Autoconf version 2, so `configure' has more options.
3032 Run `configure --help' to see the details.
3034 * The library can now be configured to build profiling, highly-optimized
3035 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3036 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3037 `configure' enable building these extra libraries. The shared library is
3038 built by default when using both ELF and GNU ld. When shared libraries
3039 are enabled, the new library `-ldl' is available for arbitrary run-time
3040 loading of shared objects; its interface is defined in <dlfcn.h>. The
3041 new header file <link.h> gives access to the internals of the run-time
3042 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3043 application of same name on other systems and it provides information
3044 about dynamically linked binaries.
3046 * The C library now provides the run-time support code for profiling
3047 executables compiled with `-pg'. Programs can control the profiling code
3048 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3049 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3050 the support for this file format was contributed by David Mosberger-Tang.
3052 * The math code has been replaced with a math library based on fdlibm from
3053 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3054 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3055 functions. The math functions now reside in a separate library, so
3056 programs using them will need to use `-lm' their linking commands.
3058 * John C. Bowman contributed optimized ix87 assembler inline functions.
3060 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3061 mechanism similar to that found in Solaris 2. This is now used for the
3062 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3063 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3064 file controls what services are used for each individual database. This
3065 works by loading shared libraries with names specified in `nsswitch.conf',
3066 so service modules can be changed or added at any time without even
3067 relinking any program. Currently there are the file, db, and NIS based
3068 NSS services available.
3070 * The new functions `strtoq' and `strtouq' parse integer values from
3071 strings, like `strtol' and `strtoul', but they return `long long int' and
3072 `unsigned long long int' values, respectively (64-bit quantities).
3074 * The new functions `strtof' and `strtold' parse floating-point values from
3075 strings, like `strtod', but they return `float' and `long double' values,
3076 respectively (on some machines `double' and `long double' are the same).
3078 * Ulrich Drepper has contributed new implementations of the floating-point
3079 printing and reading code used in the `printf' family of functions and
3080 `strtod', `strtof', and `strtold'. These new functions are perfectly
3081 accurate, and much faster than the old ones.
3083 * The implementation of the POSIX locale model was completely rewritten by
3084 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3085 to compile the POSIX locale definition.
3087 * The former dummy implementations of the strcoll and strxfrm function are
3088 now replaced by fully functional code contributed by Ulrich Drepper. The
3089 collation information comes from the POSIX locale definitions.
3091 * The new header <langinfo.h> defines an interface for accessing
3092 various locale-dependent data (using the locale chosen with `setlocale').
3094 * Ulrich Drepper has contributed a new suite of functions for operation on
3095 wide-character and multibyte-character strings, in <wchar.h>;
3096 and classification and case conversion of wide characters, in <wctype.h>.
3097 These new functions are conforming to the ISO C, Amendement 1 specification.
3099 * There is now a second implementation of the standard I/O library available.
3100 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3101 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3103 * You can now use positional parameter specifications in format strings
3104 for the `printf' and `scanf' families of functions. For example,
3105 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3106 ``Number 6, Mr Jones''. This is mainly useful when providing different
3107 format strings for different languages, whose grammars may dictate
3108 different orderings of the values being printed. To support this
3109 feature, the interface for `register_printf_handler' has changed; see
3110 the header file <printf.h> for details.
3112 * The `printf' and `scanf' families of functions now understand a new
3113 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3114 to group numbers as indicated by the locale; for `scanf' and friends, this
3115 says to accept as valid only a number with all the proper grouping
3116 separators in the right places. In the default "C" locale, numbers are
3117 not grouped; but locales for specific countries will define the usual
3118 conventions (i.e. separate thousands with `,' in the US locale).
3120 * The pgrp functions have been regularized, slightly incompatibly but much
3121 less confusingly. The core functions are now `getpgid' and `setpgid',
3122 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3123 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3124 provided for compatibility. There is no longer an incompatible `getpgrp'
3125 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3127 * The new header file <fts.h> and suite of functions simplify programs that
3128 operate on directory trees. This code comes from 4.4 BSD.
3130 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3131 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3132 NSS scheme used in glibc.
3134 * There is a new malloc debugging hook `__memalign_hook'.
3136 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3137 `unsigned int' in <sys/types.h>. These are for compatibility only and
3138 their use is discouraged.
3140 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3141 done differently, so that it works even without GNU ld.
3143 * New function `euidaccess' checks allowed access to a file like `access',
3144 but using the effective IDs instead of the real IDs.
3146 * The time zone data files have been updated for the latest and greatest
3147 local time conventions of the countries of the world.
3149 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3152 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3153 for formatting floating-point numbers. They are provided only for
3154 compatibility; new programs should use `sprintf' instead. There are
3155 also equivalent function for the `long double' floating-point type and
3156 all functions also exist in a reentrant form.
3158 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3159 functions for maintaining the login-record files (primarily of use to
3160 system programs such as `login'), and convenient functions for
3161 allocating and initializing a pseudo-terminal (pty) device.
3163 * Ulrich Drepper has contributed new support for System V style
3164 shared memory and IPC on systems that support it.
3166 * Ulrich Drepper has contributed several miscellaneous new functions found
3167 in System V: The `hsearch' family of functions provide an effective
3168 implementation of hash tables; `a64l' and `l64a' provide a very simple
3169 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3172 * Ulrich Drepper has contributed new reentrant counterparts for the
3173 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3175 * Ulrich Drepper has contributed new, highly-optimized versions of several
3176 string functions for the i486/Pentium family of processors.
3178 * Ulrich Drepper has updated the Linux-specific code, based largely
3179 on work done in Hongjiu Lu's version of GNU libc for Linux.
3180 The GNU library now supports Linux versions 2.0.10 and later,
3181 using the ELF object file format (i[3456]86-*-linux).
3183 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3185 * David Mosberger-Tang and Richard Henderson have ported the C library
3186 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3187 dynamic linking support for ELF/Alpha.
3189 * Richard Henderson contributed several Alpha optimized assembler function
3190 for arithmetic and string handling.
3192 * Ulrich Drepper has contributed a new set of message catalog functions to
3193 support multiple languages using the <libintl.h> interface, for use with
3194 his new package GNU gettext. Translation volunteers have contributed
3195 catalogs of the library's messages in Spanish, German, and Korean.
3197 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3198 program and the `catgets' function for reading the catalog files it
3199 creates. (The <libintl.h> interface is preferred; we include the
3200 <nl_types.h> interface using `catgets' only for source compatibility with
3201 programs already written to use it.)
3203 * New header file <values.h> gives SVID-compatible names for <limits.h>
3206 * Various new macros, declarations, and small header files for compatibility
3209 * New function `group_member' is a convenient way to check if a process has
3210 a given effective group ID.
3212 * When using GCC 2.7 and later, the socket functions are now declared in a
3213 special way so that passing an argument of type `struct sockaddr_in *',
3214 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3215 `struct sockaddr *' type, does not generate a type-clash warning.
3217 * New function `error' declared in header file <error.h> is a convenient
3218 function for printing error messages and optionally exiting; this is the
3219 canonical function used in GNU programs. The new functions `err', `warn',
3220 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3221 doing the same thing.
3223 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3224 POSIX.2 `glob' function to do ~ and {...} expansion.
3226 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3227 `clearenv' which is used in POSIX.9 is also available.
3229 * New function `getsid' returns session ID number on systems that support it.
3231 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3232 files <db.h> and <mpool.h> provide a rich set of functions for several
3233 types of simple databases stored in memory and in files, and <ndbm.h> is
3234 an old `ndbm'-compatible interface using the `db' functions. Link with
3235 `-ldb' to get these functions.
3237 * New macro `strdupa' copies a string like `strdup', but uses local stack
3238 space from `alloca' instead of dynamic heap space from `malloc'.
3240 * New function `strnlen' is like `strlen' but searches only a given maximum
3241 number of characters for the null terminator. `stpncpy', `strndup' and
3242 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3245 * New function `statfs' in header <sys/statfs.h>.
3247 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3248 provide convenient functions for operating on blocks of null-terminated
3251 * A new suite of functions in <utmp.h> handle all the details of reading
3252 and writing the utmp file.
3254 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3257 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3258 completely POSIX compliant and also implemented the extended functionality
3259 to handle alternate digit representation and alternate era date formats.
3261 * Ulrich Drepper provided an implementation of the `strptime' function
3262 defined in XPG4.2 which transforms a string into a `struct tm' value.
3264 * Paul Eggert provided the tzselect shell script as part of the timezone
3265 code. The shell script makes it easy to select the correct timezone
3268 * The implementation of the malloc family of functions is completely replaced
3269 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3270 The implementation uses the mmap function (if available) and it is
3271 optimized for the use in multi threaded programs.
3273 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3274 functions. This new functionality is usable by specifying a special
3275 salt string and it is compatible with implementation on *BSD systems.
3277 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3278 `getsubopt' to handle second level command line options, `bsd_signal'
3279 to access BSD style `signal' functionality, the obsolete `regexp' style
3282 * the `lchown' function is available on system which support this
3285 * The implementation of the shadow password handling function was contributed
3288 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3290 * POSIX.1g support was added. The <sys/select.h> header is available,
3291 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3292 implementation of `getaddrinfo'.
3296 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3298 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3299 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3301 * The new function `daemon' from 4.4 BSD is useful for server programs that
3302 want to put themselves in the background.
3304 * Joel Sherrill has contributed support for several standalone boards that
3305 run without an operating system.
3307 * `printf', `scanf' and friends now accept a `q' type modifier for long
3308 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3310 * All of the code taken from BSD (notably most of the math and networking
3311 routines) has been updated from the BSD 4.4-Lite release.
3313 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3315 * The new functions `getdomainname' and `setdomainname' fetch or change the
3316 YP/NIS domain name. These are system calls which exist on systems which
3319 * The time zone data files have been updated for the latest international
3322 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3323 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3327 * The C library now includes support for Sun RPC, from Sun's free
3328 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3329 are included. (There is still no support for YP.)
3331 * Tom Quinn has contributed a port of the C library to SGI machines running
3332 Irix 4 (mips-sgi-irix4).
3334 * The new `lockf' function is a simplified interface to the locking
3335 facilities of `fcntl', included for compatibility.
3337 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3339 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3341 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3344 * The error message printed by `assert' for a failed assertion now includes
3345 the name of the program (if using GNU ld) and the name of the calling
3346 function (with versions of GCC that support this).
3348 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3350 * The library now includes the <sys/mman.h> header file and memory
3351 management functions `mmap', `munmap', `mprotect', `msync', and
3352 `madvise', on systems that support those facilities.
3354 * The interface for `mcheck' has changed slightly: the function called to
3355 abort the program when an allocation inconsistency is detected now takes
3356 an argument that indicates the type of failure. The new function
3357 `mprobe' lets you request a consistency check for a particular block at
3358 any time (checks are normally done only when you call `free' or `realloc'
3361 * It is now possible to easily cross-compile the C library, building on one
3362 system a library to run on another machine and/or operating system. All
3363 you need to do is set the variable `HOST_CC' in `configparms' to the
3364 native compiler for programs to run on the machine you are building on (a
3365 few generator programs are used on Unix systems); set `CC' to the
3368 * The new function `fexecve' (only implemented on the GNU system) executes
3369 a program file given a file descriptor already open on the file.
3373 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3374 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3376 * You can set the variable `libprefix' in `configparms' to specify a prefix
3377 to be prepended to installed library files; this makes it easy to install
3378 the GNU C library to be linked as `-lgnuc' or whatever.
3380 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3381 copies a limited number of characters from a string, and returns the
3382 address of the last character written.
3384 * You no longer need to check for whether the installed `stddef.h' is
3385 compatible with the GNU C library. configure now checks for you.
3387 * You can now define a per-stream `fileno' function to convert the
3388 stream's cookie into an integral file descriptor.
3390 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3391 allocates zero bytes of storage, and returns a unique pointer which
3392 you can pass to `realloc' or `free'. The behavior is undefined if
3393 you dereference this pointer.
3395 * The C library now runs on Sony NEWS m68k machines running either
3396 NewsOS 3 or NewsOS 4.
3398 * The new `syscall' function is a system-dependent primitive function
3399 for invoking system calls. It has the canonical behavior on Unix
3400 systems, including unreliable return values for some calls (such as
3401 `pipe', `fork' and `getppid').
3403 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3404 to `EAGAIN', which is the preferred name. On systems whose kernels
3405 use two distinct codes, the C library now translates EWOULDBLOCK to
3406 EAGAIN in every system call function.
3410 * The GNU C Library Reference Manual is now distributed with the library.
3411 `make dvi' will produce a DVI file of the printed manual.
3412 `make info' will produce Info files that you can read on line using C-h i
3413 in Emacs or the `info' program.
3414 Please send comments on the manual to bug-glibc-manual@gnu.org.
3416 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3418 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3420 * Jason Merrill has contributed a port to the Sequent Symmetry running
3421 Dynix version 3 (i386-sequent-dynix).
3423 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3424 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3426 * New function `memory_warnings' lets you arrange to get warnings when
3427 malloc is running out of memory to allocate, like Emacs gives you.
3429 * The C library now contains the relocating allocator used in Emacs 19 for
3430 its editing buffers. This allocator (ralloc) minimizes allocation
3431 overhead and fragmentation by moving allocated regions around whenever it
3432 needs to. You always refer to a ralloc'd region with a "handle" (a
3433 pointer to a pointer--an object of type `void **').
3435 * There is a new `printf' format: `%m' gives you the string corresponding
3436 to the error code in `errno'.
3438 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3439 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3440 pass, the `a' modifier says to fill in a `char **' you pass with a
3443 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3444 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3445 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3447 * `mkstemp' is a traditional Unix function to atomically create and open a
3448 uniquely-named temporary file.
3452 * The standard location for the file that says what the local timezone is
3453 has changed again. It is now `/usr/local/etc/localtime' (or more
3454 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3456 * The distribution no longer contains any files with names longer than 14
3459 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3460 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3462 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3466 * The configuration process has changed quite a bit. The `configure'
3467 script is now used just like the configuration scripts for other GNU
3468 packages. The `sysdeps' directory hierarchy is much rearranged.
3469 The file `INSTALL' explains the new scheme in detail.
3471 * The header files no longer need to be processed into ANSI C and
3472 traditional C versions. There is just one set of files to install, and
3473 it will work with ANSI or old C compilers (including `gcc -traditional').
3475 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3476 MIPS DECStation running Ultrix 4.
3478 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3479 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3480 made itself into a shared library.
3482 * Yet further improved support for the i386, running 4.3 BSD-like systems
3483 (such as Mach 3 with the Unix single-server), or System V.
3485 * New function `strncasecmp' to do case-insensitive string comparison
3486 with limited length.
3488 * New function `strsep' is a reentrant alternative to `strtok'.
3490 * New functions `scandir' and `alphasort' for searching directories.
3492 * New function `setenv' is a better interface to `putenv'.
3494 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3495 function for traversing a directory tree.
3497 * The GNU obstack package is now also part of the C library.
3498 The new function `open_obstack_stream' creates a stdio stream that
3499 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3500 formatted output directly to an obstack.
3502 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3503 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3505 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3507 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3508 things to your strings.
3510 * There are some new test programs: test-fseek, testmb, and testrand.
3512 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3513 These ports are not finished, but are a good starting place for really
3514 supporting those systems.
3516 * `/etc/localtime' is now the standard location for the file that says what
3517 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3518 This follows the general principle that `/etc' is the place for all local
3519 configuration files.
3521 * The C library header files now use `extern "C"' when used by the C++
3522 compiler, so the C library should now work with C++ code.
3524 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3525 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3528 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3529 function which uses the `merge sort' algorithm, and is said to be
3530 significantly faster than the old GNU `qsort' function. Merge sort is
3531 now the standard `qsort' function. The new algorithm can require a lot
3532 of temporary storage; so, the old sorting function is called when the
3533 required storage is not available.
3535 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3536 provides the Unix `crypt' function, plus some other entry points.
3538 * The code and header files taken from 4.4 BSD have been updated with the
3539 latest files released from Berkeley.
3541 ----------------------------------------------------------------------
3542 Copyright information:
3544 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3546 Permission is granted to anyone to make or distribute verbatim copies
3547 of this document as received, in any medium, provided that the
3548 copyright notice and this permission notice are preserved,
3549 thus giving the recipient permission to redistribute in turn.
3551 Permission is granted to distribute modified versions
3552 of this document, or of portions of it,
3553 under the above conditions, provided also that they
3554 carry prominent notices stating who last changed them.
3557 version-control: never