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 not all features from that TS are 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, the
50 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
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 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
70 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
71 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
73 - llogb functions: the llogb, llogbf and llogbl functions, and the
74 FP_LLOGB0 and FP_LLOGBNAN macros.
76 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
79 - Comparison macros: iseqsig.
81 - Classification macros: iscanonical, issubnormal, iszero.
83 - Total order functions: totalorder, totalorderf, totalorderl,
84 totalordermag, totalordermagf, totalordermagl.
86 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
88 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
89 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
91 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
92 are added to libc. They convert a floating-point number into string.
94 * Most of glibc can now be built with the stack smashing protector enabled.
95 It is recommended to build glibc with --enable-stack-protector=strong.
96 Implemented by Nick Alcock (Oracle).
98 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
99 intended to be used instead of memset() to erase sensitive data after use;
100 the compiler will not optimize out calls to explicit_bzero even if they
101 are "unnecessary" (in the sense that no _correct_ program can observe the
102 effects of the memory clear).
104 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
105 to float instead of double. This does not affect the ABI of any libraries
106 that are part of the GNU C Library, but may affect the ABI of other
107 libraries that use this type in their interfaces.
109 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
110 float_t and double_t types are now defined to long double instead of float
111 and double. These options are not the default, and this does not affect
112 the ABI of any libraries that are part of the GNU C Library, but it may
113 affect the ABI of other libraries that use this type in their interfaces,
114 if they are compiled or used with those options.
116 * The getentropy and getrandom functions, and the <sys/random.h> header file
119 * The buffer size for byte-oriented stdio streams is now limited to 8192
120 bytes by default. Previously, on Linux, the default buffer size on most
121 file systems was 4096 bytes (and thus remains unchanged), except on
122 network file systems, where the buffer size was unpredictable and could be
123 as large as several megabytes.
125 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
126 for the Linux quota interface which predates kernel version 2.4.22 has
129 * The malloc_get_state and malloc_set_state functions have been removed.
130 Already-existing binaries that dynamically link to these functions will
131 get a hidden implementation in which malloc_get_state is a stub. As far
132 as we know, these functions are used only by GNU Emacs and this change
133 will not adversely affect already-built Emacs executables. Any undumped
134 Emacs executables, which normally exist only during an Emacs build, should
135 be rebuilt by re-running “./configure; make” in the Emacs build tree.
137 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
138 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
139 “no-ip6-dotint” had already been the default, and support for the
140 “ip6-dotint” option was removed from the Internet in 2006.
142 * The "ip6-bytestring" resolver option and the corresponding RES_NOIP6DOTINT
143 flag from <resolv.h> have been removed. The option relied on a
144 backwards-incompatible DNS extension which was never deployed on the
147 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
148 RES_BLAST defined in the <resolv.h> header file have been deprecated.
149 They were already unimplemented.
151 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
152 _res.flags are deprecated. The flag was standardized in RFC 2133, but
153 removed again from the IETF name lookup interface specification in RFC
154 2553. Applications should use getaddrinfo instead.
156 * DNSSEC-related declarations and definitions have been removed from the
157 <arpa/nameser.h> header file, and libresolv will no longer attempt to
158 decode the data part of DNSSEC record types. Previous versions of glibc
159 only implemented minimal support for the previous version of DNSSEC, which
160 is incompatible with the currently deployed version.
162 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
163 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
164 <arpa/nameser.h> header file because the distinction between RR types and
165 meta-RR types is not officially standardized, subject to revision, and
166 thus not suitable for encoding in a macro.
168 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
169 and rhook members of the res_state type in <resolv.h> have been removed.
170 The glibc stub resolver did not support these hooks, but the header file
171 did not reflect that.
173 * For multi-arch support it is recommended to use a GCC which has
174 been built with support for GNU indirect functions. This ensures
175 that correct debugging information is generated for functions
176 selected by IFUNC resolvers. This support can either be enabled by
177 configuring GCC with '--enable-gnu-indirect-function', or by
178 enabling it by default by setting 'default_gnu_indirect_function'
179 variable for a particular architecture in the GCC source file
182 * GDB pretty printers have been added for mutex and condition variable
183 structures in POSIX Threads. When installed and loaded in gdb these pretty
184 printers show various pthread variables in human-readable form when read
185 using the 'print' or 'display' commands in gdb.
187 * Tunables feature added to allow tweaking of the runtime for an application
188 program. This feature can be enabled with the '--enable-tunables' configure
189 flag. The GNU C Library manual has details on usage and README.tunables has
190 instructions on adding new tunables to the library.
192 Security related changes:
194 On ARM EABI (32-bit), generating a backtrace for execution contexts which
195 have been created with makecontext could fail to terminate due to a
196 missing .cantunwind annotation. This has been observed to lead to a hang
197 (denial of service) in some Go applications compiled with gccgo. Reported
198 by Andreas Schwab. (CVE-2016-6323)
200 The following bugs are resolved with this release:
202 [The release manager will add the list generated by
203 scripts/list-fixed-bugs.py just before the release.]
207 * The minimum Linux kernel version that this version of the GNU C Library
208 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
209 kernel version 2.6.32 or later suffices (on architectures that already
210 required kernel versions more recent than 3.2, those requirements remain
211 unchanged). Linux 3.2 or later kernel headers are required on all
214 * The pap_AN locale has been deleted. This has been deprecated for a long
215 time. It has been replaced by pap_AW & pap_CW, both of which have long
216 been included in previous releases.
218 * The readdir_r and readdir64_r functions have been deprecated. It is
219 recommended to use readdir and readdir64 instead.
221 * The type “union wait” has been removed. It was deprecated in the early
222 1990s and never part of POSIX. Application code should use the int type
223 instead of “union wait”.
225 * A new NSS action is added to facilitate large distributed system
226 administration. The action, MERGE, allows remote user stores like LDAP
227 to be merged into local user stores like /etc/groups in order to provide
228 easy to use, updated, and managed sets of merged credentials. The new
229 action can be used by configuring it in /etc/nsswitch.conf:
230 group: files [SUCCESS=merge] nis
231 Implemented by Stephen Gallagher (Red Hat).
233 * The deprecated __malloc_initialize_hook variable has been removed from the
236 * The long unused localedef --old-style option has been removed. It hasn't
237 done anything in over 16 years. Scripts using this option can safely
240 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
241 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
242 return the next representable value in the direction of positive infinity
243 and the nextdown functions return the next representable value in the
244 direction of negative infinity. These are currently enabled as GNU
247 Security related changes:
249 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
250 could result in a stack overflow when getnetbyname was called with an
251 overly long name. (CVE-2016-3075)
253 * Previously, getaddrinfo copied large amounts of address data to the stack,
254 even after the fix for CVE-2013-4458 has been applied, potentially
255 resulting in a stack overflow. getaddrinfo now uses a heap allocation
256 instead. Reported by Michael Petlan. (CVE-2016-3706)
258 * The glob function suffered from a stack-based buffer overflow when it was
259 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
260 Reported by Alexander Cherepanov. (CVE-2016-1234)
262 * The Sun RPC UDP client could exhaust all available stack space when
263 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
264 alloca plugin for GCC. (CVE-2016-4429)
266 * The IPv6 name server management code in libresolv could result in a memory
267 leak for each thread which is created, performs a failing naming lookup,
268 and exits. Over time, this could result in a denial of service due to
269 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
271 The following bugs are resolved with this release:
273 [1170] localedata: ne_NP: update Nepali locale definition file
274 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
276 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
277 [6796] math: fdim() does not set errno on overflow
278 [10354] libc: posix_spawn should use vfork() in more cases than presently
279 [11213] localedata: localedata: add copyright disclaimer to locale files
280 [12143] localedata: chr_US: new Cherokee locale
281 [12450] localedata: sgs_LT: new locale
282 [12676] localedata: ln_CD: new locale
283 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
285 [13304] math: fma, fmaf, fmal produce wrong results
286 [14259] build: --localedir arg to configure is ignored
287 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
288 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
289 [14934] localedata: es_CL: wrong first weekday chilean locale
290 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
292 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
294 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
295 [15368] nptl: raise() is not async-signal-safe
296 [15479] math: ceil, floor, round and trunc raise inexact exception
297 [15578] localedata: kk_KZ: various updates
298 [16003] localedata: pap_AN: punt old locale
299 [16137] localedata: iw_IL: punt old locale
300 [16190] localedata: eo: new esperanto locale
301 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
302 [16742] malloc: race condition: pthread_atfork() called before first
303 malloc() results in unexpected locking behaviour/deadlocks
304 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
306 [16983] localedata: postal_fmt does not allow %l and %n modifiers
307 [17565] localedata: pt_PT: wrong (work-)week start
308 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
309 [17950] build: Build fails with -msse
310 [18205] localedata: be_BY*: wrong first_weekday and first_workday
311 [18433] libc: posix_spawn does not return correctly upon failure to
313 [18453] localedata: charmaps/IBM875: incorrect codes
314 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
316 [18896] localedata: he_IL: improvements for currency
317 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
319 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
321 [19056] libc: Deprecate readdir_r
322 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
324 [19198] localedata: nl_NL: small improvements for Dutch locales
325 [19257] network: Per-thread memory leak in __res_vinit with IPv6
326 nameservers (CVE-2016-5417)
327 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
329 [19400] locale: Language missing in "iso-639.def", trivial fix in
331 [19431] malloc: Deadlock between fflush, getdelim, and fork
332 [19505] libc: Incorrect file descriptor validity checks in
333 posix_spawn_file_actions_add{open,close,dup2}
334 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
336 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
337 `intl/{gettextP,loadinfo}.h'
338 [19534] libc: execle, execlp may use malloc
339 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
340 [19573] network: res_nclose and __res_maybe_init disagree about name
341 server initialization, breaking Hesiod
342 [19575] localedata: Status of GB18030 tables
343 [19581] localedata: sr_* date_fmt string contains additional newline
344 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
346 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
347 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
348 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
349 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
351 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
353 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
355 [19610] dynamic-link: ldconfig -X removes stale symbolic links
356 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
357 [19633] locale: strfmon_l applies global locale to number formatting
358 [19642] network: Memory leak in getnameinfo
359 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
360 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
362 [19654] math: [x86_64] Need testcase for BZ #19590 fix
363 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
365 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
366 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
368 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
370 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
372 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
373 pointers and lengths in error-case.
374 [19727] locale: Converting from/to UTF-xx with iconv() does not always
375 report errors on UTF-16 surrogates values.
376 [19755] nscd: nscd assertion failure in gc
377 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
378 [19759] libc: mempcpy shouldn't be inlined
379 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
380 [19765] libc: s390 needs an optimized mempcpy
381 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
382 NAME_MAX limit assumption (CVE-2016-1234)
383 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
384 [19787] network: Missing and incorrect truncation checks in getnameinfo
385 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
387 [19791] network: Assertion failure in res_query.c with un-connectable name
389 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
390 [19822] math: libm.so install clobbers old version
391 [19825] network: resolv: send_vc can return uninitialized data in second
392 response to getaddrinfo
393 [19830] network: nss_dns: should check RDATA length against buffer length
394 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
395 confronted with A/AAAA records of invalid size
396 [19837] nss: nss_db: No retries for some long lines with a larger buffer
397 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
398 [19853] stdio: Printing IBM long double in decimal with high precision is
400 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
401 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
402 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
404 [19865] network: Assertion failure or memory leak in
405 _nss_dns_getcanonname_r
406 [19868] network: nss_dns: netent code does not skip over non-PTR records
407 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
409 [19881] string: Improve x86-64 memset
410 [19907] string: Incorrect memcpy tests
411 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
413 [19925] libc: termios.h XCASE namespace
414 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
415 [19929] libc: limits.h NL_NMAX namespace
416 [19931] stdio: Memory leak in vfprintf
417 [19957] libc: clone(CLONE_VM) access invalid parent memory
418 [19963] localedata: en_IL: New locale
419 [19989] stdio: stdio.h cuserid namespace
420 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
422 [19996] locale: langinfo.h nl_langinfo_l namespace
423 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
424 [20010] network: getaddrinfo: Stack overflow in hostent translation
426 [20012] stdio: libio: fmemopen append mode failure
427 [20014] stdio: stdio.h namespace for pre-threads POSIX
428 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
429 [20023] libc: fcntl.h timespec namespace
430 [20024] math: [x86_64] vectorized sincos trashes the stack
431 [20031] network: nss_hesiod: Heap overflow in get_txt_records
432 [20041] time: sys/time.h timespec namespace
433 [20043] libc: unistd.h missing cuserid for UNIX98 and before
434 [20044] libc: unistd.h missing pthread_atfork for UNIX98
435 [20051] libc: ttyslot in wrong header under wrong conditions
436 [20054] libc: gethostname not declared for XPG4
437 [20055] libc: termios.h missing tcgetsid for XPG4
438 [20072] dynamic-link: x86 init_cpu_features is called twice in static
440 [20073] libc: sys/stat.h fchmod namespace
441 [20074] libc: stdlib.h rand_r namespace
442 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
443 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
445 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
446 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
448 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
449 [20119] libc: Wrong mask for processors level type from CPUID
450 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
451 AS not supporting AVX512
452 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
454 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
455 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
457 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
458 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
459 [20178] libc: posix_spawn{p} should not call exit
460 [20191] stdio: libio: vtables hardening
461 [20195] string: FMA4 detection requires CPUID execution with register
463 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
464 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
466 [20212] math: acos (sNaN) returns sNaN
467 [20213] math: asin (sNaN) returns sNaN
468 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
469 [20218] math: [i386] asinhl (sNaN) returns sNaN
470 [20219] math: [i386] atanhl (sNaN) returns sNaN
471 [20222] stdio: fopencookie: Mangle function pointers
472 [20224] math: [i386] cbrtl (sNaN) returns sNaN
473 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
474 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
476 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
477 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
478 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
479 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
480 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
481 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
482 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
483 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
484 [20240] math: modf (sNaN) returns sNaN
485 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
486 [20250] math: frexp (sNaN) returns sNaN
487 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
488 [20255] math: [i386] fdim, fdimf return with excess range and precision /
490 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
491 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
492 subscript is below array bounds [-Werror=array-bounds]
493 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
494 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
496 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
497 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
499 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
501 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
502 [20316] localedata: id_ID: Februari instead of Pebruari
503 [20327] string: POWER8 strcasecmp returns incorrect result
504 [20347] math: Failure: Test: j0_downward (0xap+0)
505 [20348] libc: FAIL: misc/tst-preadvwritev64
506 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
507 [20350] libc: There is no test for p{read,write}64
508 [20357] math: Incorrect cos result for 1.5174239687223976
509 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
513 * Unicode 8.0.0 Support: Character encoding, character type info, and
514 transliteration tables are all updated to Unicode 8.0.0, using new
515 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
516 These updates cause user visible changes, such as the fixes for bugs
517 89, 16061, and 18568.
519 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
520 kernel-internal CPU set size. This means that requests that change the
521 CPU affinity which failed before (for example, an all-ones CPU mask) will
522 now succeed. Applications that need to determine the effective CPU
523 affinities need to call sched_getaffinity or pthread_getaffinity_np after
524 setting it because the kernel can adjust it (and the previous size check
525 would not detect this in the majority of cases).
527 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
528 the following new symbols are used: fts64_children, fts64_close,
529 fts64_open, fts64_read and fts64_set.
531 * getaddrinfo now detects certain invalid responses on an internal netlink
532 socket. If such responses are received, an affected process will
533 terminate with an error message of "Unexpected error <number> on netlink
534 descriptor <number>" or "Unexpected netlink response of size <number> on
535 descriptor <number>". The most likely cause for these errors is a
536 multi-threaded application which erroneously closes and reuses the netlink
537 file descriptor while it is used by getaddrinfo.
539 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
540 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
541 unnecessary serialization of memory allocation requests across threads.
542 The defect is now corrected. Users should see a substantial increase in
543 the concurent throughput of allocation requests for applications which
544 trigger this bug. Affected applications typically create and
545 destroy threads frequently. (Bug 19048 was reported and analyzed by
548 * There is now a --disable-timezone-tools configure option for disabling the
549 building and installing of the timezone related utilities (zic, zdump, and
550 tzselect). This is useful for people who build the timezone data and code
551 independent of the GNU C Library.
553 * The obsolete header <regexp.h> has been removed. Programs that require
554 this header must be updated to use <regex.h> instead.
556 * The obsolete functions bdflush, create_module, get_kernel_syms,
557 query_module and uselib are no longer available to newly linked binaries;
558 the header <sys/kdaemon.h> has been removed. These functions and header
559 were specific to systems using the Linux kernel and could not usefully be
560 used with the GNU C Library on systems with version 2.6 or later of the
563 * Optimized string, wcsmbs and memory functions for IBM z13.
564 Implemented by Stefan Liebler.
566 * Newly linked programs that define a variable called signgam will no longer
567 have it set by the lgamma, lgammaf and lgammal functions. Programs that
568 require signgam to be set by those functions must ensure that they use the
569 variable provided by the GNU C Library and declared in <math.h>, without
570 defining their own copy.
572 * The minimum GCC version that can be used to build this version of the GNU
573 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
574 still be used to compile programs using the GNU C Library.
576 Security related changes:
578 * An out-of-bounds value in a broken-out struct tm argument to strftime no
579 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
581 * The LD_POINTER_GUARD environment variable can no longer be used to disable
582 the pointer guard feature. It is always enabled. Previously,
583 LD_POINTER_GUARD could be used to disable security hardening in binaries
584 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
587 * An integer overflow in hcreate and hcreate_r could lead to an
588 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
590 * The catopen function no longer has unbounded stack usage. Reported by
593 * The nan, nanf and nanl functions no longer have unbounded stack usage
594 depending on the length of the string passed as an argument to the
595 functions. Reported by Joseph Myers. (CVE-2014-9761)
597 * A stack-based buffer overflow was found in libresolv when invoked from
598 libnss_dns, allowing specially crafted DNS responses to seize control
599 of execution flow in the DNS client. The buffer overflow occurs in
600 the functions send_dg (send datagram) and send_vc (send TCP) for the
601 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
602 family. The use of AF_UNSPEC triggers the low-level resolver code to
603 send out two parallel queries for A and AAAA. A mismanagement of the
604 buffers used for those queries could result in the response of a query
605 writing beyond the alloca allocated buffer created by
606 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
607 the overflow. Thanks to the Google Security Team and Red Hat for
608 reporting the security impact of this issue, and Robert Holiday of
609 Ciena for reporting the related bug 18665. (CVE-2015-7547)
611 The following bugs are resolved with this release:
613 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
614 [887] math: Math library function "logb" and "nextafter" inconsistent
615 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
616 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
617 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
618 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
620 [4404] localedata: German translation of "Alarm clock" is misleading
621 [6799] math: nextafter() and nexttoward() doen't set errno on
622 overflow/underflow errors
623 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
625 [10432] nis: _nss_nis_setnetgrent assertion failure
626 [11460] libc: fts has no LFS support
627 [12926] network: getaddrinfo()/make_request() may spin forever
628 [13065] nptl: Race condition in pthread barriers
629 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
630 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
632 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
633 [14912] libc: Rename non-installed bits/*.h headers
634 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
635 [15367] math: Let gcc use __builtin_isinf
636 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
637 [15421] math: lgamma wrongly sets signgam for ISO C
638 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
639 FE_INVALID with argument out of range
640 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
642 [15786] dynamic-link: ifunc resolver functions can smash function
644 [15918] math: Unnecessary check for equality in hypotf()
645 [16061] localedata: Review / update transliteration data
646 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
648 [16141] time: strptime %z offset restriction
649 [16171] math: drem should be alias of remainder
650 [16296] math: fegetround is pure?
651 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
652 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
654 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
655 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
657 [16422] math: [powerpc] math-float, math-double failing llrint tests with
658 "Exception "Inexact" set" on ppc32
659 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
660 [16517] math: Missing underflow exception from tanf/tan/tanl
661 [16519] math: Missing underflow exception from sinhf
662 [16520] math: Missing underflow exception from tanhf
663 [16521] math: Missing underflow exception from exp2
664 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
666 [16734] stdio: fopen calls mmap to allocate its buffer
667 [16961] math: nan function incorrect handling of bad sequences
668 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
669 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
670 [16985] locale: localedef: confusing error message when opening output
672 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
673 [17197] locale: Redundant shift character in iconv conversion output at
675 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
676 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
677 [17250] dynamic-link: static linking breaks nss loading
678 (getaddrinfo/getpwnam/etc...)
679 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
681 [17441] math: isnan() should use __builtin_isnan() in GCC
682 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
683 (related to lock elision)
684 [17787] manual: Exponent on page 324 of the PDF ends prematurely
685 [17886] time: strptime should be able to parse "Z" as a timezone with %z
686 [17887] time: strptime should be able to parse "+01:00" style timezones
687 [17905] libc: catopen() Multiple unbounded stack allocations
689 [18084] libc: backtrace (..., 0) dumps core on x86
690 [18086] libc: nice() sets errno to 0 on success
691 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
692 is too large (CVE-2015-8778)
693 [18251] dynamic-link: SONAME missing when audit modules provides path
694 [18265] libc: add attributes for wchar string and memory functions
695 [18370] math: csqrt missing underflows
696 [18421] libc: [hppa] read-only segment has dynamic relocations
697 [18472] libc: Obsolete syscall wrappers should be compat symbols
698 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
699 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
700 [18525] localedata: Remove locale timezone information
701 [18560] libc: [powerpc] spurious bits/ipc.h definitions
702 [18568] localedata: Update locale data to Unicode 8.0
703 [18589] locale: sort-test.sh fails at random
704 [18595] math: ctan, ctanh missing underflows
705 [18604] libc: assert macro-expands its argument
706 [18610] math: S390: fetestexcept() reports any exception if DXC-code
707 contains a vector instruction exception.
708 [18611] math: j1, jn missing errno setting on underflow
709 [18618] localedata: sync Chechen locale definitions with other *_RU
711 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
712 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
713 [18665] network: In send_dg, the recvfrom function is NOT always using the
714 buffer size of a newly created buffer (CVE-2015-7547)
715 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
717 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
719 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
720 [18699] math: tilegx cproj() for various complex infinities does not yield
722 [18724] libc: Harden put*ent functions against data injection
723 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
724 [18755] build: build errors with -DNDEBUG
725 [18757] stdio: fmemopen fails to set errno on failure
726 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
728 [18781] libc: openat64 lacks O_LARGEFILE
729 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
730 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
731 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
732 [18790] math: [ldbl-128ibm] tanhl inaccurate
733 [18795] libc: stpncpy fortification misses buffer lengths that are
735 [18796] build: build fails for --disable-mathvec
736 [18803] math: hypot missing underflows
737 [18820] stdio: fmemopen may leak memory on failure
738 [18823] math: csqrt spurious underflows
739 [18824] math: fma spurious underflows
740 [18825] math: pow missing underflows
741 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
742 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
743 [18870] build: sem_open.c fails to compile with missing symbol
745 [18872] stdio: Fix memory leak in printf_positional
746 [18873] libc: posix_fallocate overflow check ineffective
747 [18875] math: Excess precision leads incorrect libm
748 [18877] libc: arm: mmap offset regression
749 [18887] libc: memory corruption when using getmntent on blank lines
750 [18918] localedata: hu_HU: change time to HH:MM:SS format
751 [18921] libc: Regression: extraneous stat() and fstat() performed by
753 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
754 binaries (CVE-2015-8777)
755 [18951] math: tgamma missing underflows
756 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
758 [18953] localedata: lt_LT: change currency symbol to the euro
759 [18956] math: powf inaccuracy
760 [18961] math: [i386] exp missing underflows
761 [18966] math: [i386] exp10 missing underflows
762 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
763 [18969] build: multiple string test failures due to missing locale
765 [18970] libc: Reference of pthread_setcancelstate in libc.a
766 [18977] math: float / long double Bessel functions not in XSI POSIX
767 [18980] math: i386 libm functions return with excess range and precision
768 [18981] math: i386 scalb*, ldexp return with excess range and precision
769 [18982] stdio: va_list and vprintf
770 [18985] time: Passing out of range data to strftime() causes a segfault
772 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
773 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
774 [19012] locale: iconv_open leaks memory on error path
775 [19016] math: clog, clog10 inaccuracy
776 [19018] nptl: Mangle function pointers in tls_dtor_list
777 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
778 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
779 [19048] malloc: malloc: arena free list can become cyclic, increasing
781 [19049] math: [powerpc] erfc incorrect zero sign
782 [19050] math: [powerpc] log* incorrect zero sign
783 [19058] math: [x86_64] Link fail with -fopenmp and -flto
784 [19059] math: nexttoward overflow incorrect in non-default rounding modes
785 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
786 [19074] network: Data race in _res_hconf_reorder_addrs
787 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
788 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
789 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
791 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
793 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
794 [19086] manual: posix_fallocate64 documented argument order is wrong.
795 [19088] math: lround, llround missing exceptions close to overflow
797 [19094] math: lrint, llrint missing exceptions close to overflow threshold
798 [19095] math: dbl-64 lrint incorrect for 64-bit long
799 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
800 [19124] dynamic-link: ld.so failed to build with older assmebler
801 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
802 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
803 [19134] math: [powerpc32] lround, lroundf spurious exceptions
804 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
805 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
806 pthread_setaffinity_np
807 [19156] math: [ldbl-128] j0l spurious underflows
808 [19164] nptl: tst-getcpu fails with many possible CPUs
809 [19168] math: math/test-ildoubl and math/test-ldouble failure
810 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
811 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
813 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
814 (FE_NOMASK_ENV) do not clear SSE exceptions
815 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
816 _int_new_arena/reused_arena
817 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
818 [19201] math: dbl-64 remainder incorrect sign of zero result
819 [19205] math: bits/math-finite.h conditions do not match math.h and
821 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
822 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
823 for C99-based standards
824 [19212] libc: features.h not -Wundef clean
825 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
827 [19214] libc: Family and model identification for AMD CPU's are incorrect.
828 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
829 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
831 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
833 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
835 [19242] libc: strtol incorrect in Turkish locales
836 [19243] malloc: reused_arena can pick an arena on the free list, leading
837 to an assertion failure and reference count corruption
838 [19253] time: tzset() ineffective when temporary TZ did not include DST
840 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
841 [19270] math: [hppa] Shared libm missing __isnanl
842 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
843 MAP_HUGETLB and MAP_STACK defines
844 [19313] nptl: Wrong __cpu_mask for x32
845 [19347] libc: grantpt: try to force a specific gid even without pt_chown
846 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
847 [19350] math: [ldbl-128ibm] sinhl spurious overflows
848 [19351] math: [ldbl-128ibm] logl inaccurate near 1
849 [19363] time: x32: times() return value wrongly truncates/sign extends
851 [19367] dynamic-link: Improve branch prediction on Silvermont
852 [19369] network: Default domain name not reset by res_ninit when "search"
853 / "domain" entry is removed from resolv.conf
854 [19375] math: powerpc: incorrect results for POWER7 logb with negative
856 [19385] localedata: bg_BG: time separator should be colon, not comma
857 [19408] libc: linux personality syscall wrapper may erroneously return an
858 error on 32-bit architectures
859 [19415] libc: dladdr returns wrong names on hppa
860 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
861 IBM905, IBM907, and IBM909
862 [19439] math: Unix98 isinf and isnan functions conflict with C++11
863 [19443] build: build failures with -DDEBUG
864 [19451] build: Make check fails on test-double-vlen2
865 [19462] libc: Glibc failed to build with -Os
866 [19465] math: Wrong code with -Os
867 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
869 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
871 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
872 [19486] math: S390: Math tests fail with "Exception Inexact set".
873 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
874 [19550] libc: [mips] mmap negative offset handling inconsistent with other
876 [19590] math: Fail to build shared objects that use libmvec.so functions.
880 * The following bugs are resolved with this release:
882 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
883 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
884 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
885 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
886 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
887 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
888 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
889 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
890 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
891 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
892 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
893 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
894 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
895 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
896 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
897 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
898 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
899 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
900 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
901 18657, 18676, 18694, 18696, 18887.
903 * Cache information can be queried via sysconf() function on s390 e.g. with
904 _SC_LEVEL1_ICACHE_SIZE as argument.
906 * A buffer overflow in gethostbyname_r and related functions performing DNS
907 requests has been fixed. If the NSS functions were called with a
908 misaligned buffer, the buffer length change due to pointer alignment was
909 not taken into account. This could result in application crashes or,
910 potentially arbitrary code execution, using crafted, but syntactically
911 valid DNS responses. (CVE-2015-1781)
913 * The time zone file parser has been made more robust against crafted time
914 zone files, avoiding heap buffer overflows related to the processing of
915 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
916 large time zone data files. Overly long time zone specifiers in the TZ
917 variable no longer result in stack overflows and crashes.
919 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
920 for LD and GD on x86 and x86-64, has been implemented. You will need
921 binutils-2.24 or later to enable this optimization.
923 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
924 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
925 Hat). These updates cause user visible changes, such as the fix for bug
928 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
929 and getXXbyYY NSS calls for the same database, causing a denial-of-service
930 condition in some applications.
932 * Added vector math library named libmvec with the following vectorized x86_64
933 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
935 The library can be disabled with --disable-mathvec. Use of the functions is
936 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
937 Shared library libmvec.so is linked in as needed when using -lm (no need to
938 specify -lmvec explicitly for not static builds).
939 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
941 * A new fmemopen implementation has been added with the goal of POSIX
942 compliance. The new implementation fixes the following long-standing
943 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
944 old implementation is still present for use be by existing binaries.
946 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
947 releases. It has been fixed to match 2.19 and older, but binaries built
948 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
950 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
951 Contributed by Roland McGrath (Google).
953 * The header <regexp.h> is deprecated, and will be removed in a future
954 release. Use of this header will trigger a deprecation warning.
955 Application developers should update their code to use <regex.h> instead.
957 This header was formerly part of SUS, but was deprecated in 1994 and
958 removed from the standard in 2001. Also, the glibc implementation
959 leaks memory. See BZ#18681 for more details.
963 * The following bugs are resolved with this release:
965 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
966 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
967 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
968 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
969 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
970 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
971 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
972 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
973 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
974 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
977 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
978 too little memory for the to-be-scanned arguments and overflow the
979 allocated buffer. The implementation now correctly computes the required
980 buffer size when using malloc, and switches to malloc from alloca as
983 * A new semaphore algorithm has been implemented in generic C code for all
984 machines. Previous custom assembly implementations of semaphore were
985 difficult to reason about or ensure that they were safe. The new version
986 of semaphore supports machines with 64-bit or 32-bit atomic operations.
987 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
988 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
990 * Port to Altera Nios II has been contributed by Mentor Graphics.
992 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
993 implementations for powerpc64/powerpc64le.
994 Implemented by Adhemerval Zanella (IBM).
996 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
997 and powerpc64le. This may improve lock scaling of existing programs on
998 HTM capable systems. The lock elision code is only enabled with
999 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1000 powerpc will issue a transaction abort on every syscall to avoid side
1001 effects being visible outside transactions.
1003 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1004 AArch64. Contributed by ARM Ltd.
1006 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1008 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1009 under certain input conditions resulting in the execution of a shell for
1010 command substitution when the application did not request it. The
1011 implementation now checks WRDE_NOCMD immediately before executing the
1012 shell and returns the error WRDE_CMDSUB as expected.
1014 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1015 processing format strings with a large number of format specifiers.
1017 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1018 infinite loop if the DNS response contained a PTR record of an unexpected
1021 * The minimum GCC version that can be used to build this version of the GNU
1022 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1023 still be used to compile programs using the GNU C Library.
1025 * The GNU C Library is now built with -Werror by default. This can be
1026 disabled by configuring with --disable-werror.
1028 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1030 * The obsolete sigvec function has been removed. This was the original
1031 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1032 programs have been using instead for about 25 years. Of course, ABI
1033 compatibility for old binaries using sigvec remains intact.
1035 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1036 with newer versions of bison.
1038 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1039 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1040 registers overlay two consecutive single-precision registers. MIPS32R2
1041 introduced a new FPU mode (FR=1) where double-precision registers extend the
1042 corresponding single-precision registers which is incompatible with the
1043 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1044 require the use of FR=1 making a transition necessary. New o32 ABI
1045 extensions enable users to migrate over time from the original o32 ABI
1046 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1047 tracks the ABI of any loaded object and verifies that new objects are
1048 compatible. Mode transitions will also be requested as required and
1049 unsupportable objects will be rejected. The ABI checks include both soft and
1050 hard float ABIs for o32, n32 and n64.
1052 GCC 5 with GNU binutils 2.25 onwards:
1053 It is strongly recommended that all o32 system libraries are built using the
1054 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1055 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1056 compiler using --with-fp-32=xx to set this by default.
1060 * The following bugs are resolved with this release:
1062 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1063 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1064 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1065 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1066 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1067 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1068 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1069 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1070 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1071 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1072 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1073 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1074 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1075 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1076 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1078 * Reverted change of ABI data structures for s390 and s390x:
1079 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1080 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1081 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1082 are preserved pointing straight to the same implementation as the old ones.
1083 Given that, new callers will simply provide a too-big buffer to these
1084 functions. Any applications/libraries out there that embed jmp_buf or
1085 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1086 against 2.19 headers will have to rebuilt again. This is necessary in any
1087 case to revert the breakage in their ABI caused by the glibc change.
1089 * Support for file description locks is added to systems running the
1090 Linux kernel. The standard file locking interfaces are extended to
1091 operate on file descriptions, not file descriptors, via the use of
1092 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1093 are associated with an open file instead of a process.
1095 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1097 * The minimum Linux kernel version that this version of the GNU C Library
1098 can be used with is 2.6.32.
1100 * Running the testsuite no longer terminates as soon as a test fails.
1101 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1102 with PASS or FAIL lines for individual tests. A summary of the results is
1103 printed, including a list of failing lists, and "make check" exits with
1104 error status if there were any unexpected failures. "make check
1105 stop-on-test-failure=y" may be used to keep the old behavior.
1107 * The am33 port, which had not worked for several years, has been removed
1110 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1111 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1112 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1113 conflicted with POSIX (support for which was removed in 2.19), the
1114 interfaces those macros enabled remain available when compiling with
1115 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1116 test macros defined.
1118 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1120 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1121 This may improve lock scaling of existing programs on TX capable systems.
1122 The lock elision code is only built with --enable-lock-elision=yes and
1123 then requires a GCC version supporting the TX builtins. With lock elision
1124 default mutexes are elided via __builtin_tbegin, if the cpu supports
1125 transactions. By default lock elision is not enabled and the elision code
1128 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1129 copy the path argument. This allowed programs to cause posix_spawn to
1130 deference a dangling pointer, or use an unexpected pathname argument if
1131 the string was modified after the posix_spawn_file_actions_addopen
1134 * All supported architectures now use the main glibc sysdeps directory
1135 instead of some being in a separate "ports" directory (which was
1136 distributed separately before glibc 2.17).
1138 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1139 On configurations that support it (all Linux configurations), it's now
1140 used regardless of the --enable-add-ons switch to configure. It is no
1141 longer possible to build such configurations without pthreads support.
1143 * Locale names, including those obtained from environment variables (LANG
1144 and the LC_* variables), are more tightly checked for proper syntax.
1145 setlocale will now fail (with EINVAL) for locale names that are overly
1146 long, contain slashes without starting with a slash, or contain ".." path
1147 components. (CVE-2014-0475) Previously, some valid locale names were
1148 silently replaced with the "C" locale when running in AT_SECURE mode
1149 (e.g., in a SUID program). This is no longer necessary because of the
1152 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1153 with application code using Intel MPX instructions. (With all previous
1154 versions, the MPX register state could be clobbered when making calls
1155 into or out of a shared library.) Note that while the new dynamic
1156 linker is compatible with all known x86 hardware whether or not it
1157 supports Intel MPX, some x86 instruction-set emulators might fail to
1158 handle the new instruction encodings. This is known to affect Valgrind
1159 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1160 release), and might affect other tools that do instruction emulation.
1162 * Support for loadable gconv transliteration modules has been removed.
1163 The support for transliteration modules has been non-functional for
1164 over a decade, and the removal is prompted by security defects. The
1165 normal gconv conversion modules are still supported. Transliteration
1166 with //TRANSLIT is still possible, and the //IGNORE specifier
1167 continues to be supported. (CVE-2014-5119)
1169 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1170 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1171 resulting a denial-of-service security vulnerability in applications which
1172 use functions related to iconv. (CVE-2014-6040)
1176 * The following bugs are resolved with this release:
1178 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1179 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1180 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1181 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1182 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1183 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1184 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1185 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1186 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1187 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1188 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1189 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1190 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1191 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1192 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1193 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1194 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1195 16431, 16453, 16474, 16506, 16510, 16529
1197 * Slovenian translations for glibc messages have been contributed by the
1198 Translation Project's Slovenian team of translators.
1200 * The public headers no longer use __unused nor __block. This change is to
1201 support compiling programs that are derived from BSD sources and use
1202 __unused internally, and to support compiling with Clang's -fblock
1203 extension which uses __block.
1205 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1206 large collation sequences to optimize multiple passes. This cache
1207 computation may overflow for large collation sequences and may cause a
1208 stack or buffer overflow. This is now fixed to use a slower algorithm
1209 which does not use a cache if there is an integer overflow.
1211 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1212 rules for large collation sequences to optimize multiple passes and falls
1213 back to alloca if malloc fails, resulting in a possible stack overflow.
1214 The implementation now falls back to an uncached collation sequence lookup
1217 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1218 initialized for static applications resulting in the security feature
1219 being disabled. The pointer guard is now correctly initialized to a
1220 random value for static applications. Existing static applications need
1221 to be recompiled to take advantage of the fix (bug 15754).
1223 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1224 to the d_name member of struct dirent, or omit the terminating NUL
1225 character. (Bugzilla #14699).
1227 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1228 aligned_alloc functions could allocate too few bytes or corrupt the
1229 heap when passed very large allocation size values (Bugzilla #15855,
1232 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1233 for AF_INET6 has been fixed (Bugzilla #16072).
1235 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1236 pap_CW, quz_PE, the_NP.
1238 * Substantially revised locales: gd_GB, ht_HT
1240 * The LC_ADDRESS field was updated to support country_car for almost all
1243 * ISO 1427 definitions were updated.
1245 * ISO 3166 definitions were updated.
1247 * The localedef utility now supports --big-endian and --little-endian
1248 command-line options to generate locales for a different system from that
1249 for which the C library was built.
1251 * Binary locale files now only depend on the endianness of the system for
1252 which they are generated and not on other properties of that system. As a
1253 consequence, binary files generated with new localedef may be incompatible
1254 with old versions of the GNU C Library, and binary files generated with
1255 old localedef may be incompatible with this version of the GNU C Library,
1256 in the following circumstances:
1258 + Locale files may be incompatible on m68k systems.
1260 + Locale archive files (but not separate files for individual locales) may
1261 be incompatible on systems where plain "char" is signed.
1263 * The configure option --disable-versioning has been removed. Builds with
1264 --disable-versioning had not worked for several years.
1266 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1267 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1269 * SystemTap probes for malloc have been introduced.
1271 * SystemTap probes for slow multiple precision fallback paths of
1272 transcendental functions have been introduced.
1274 * Support for powerpc64le has been added.
1276 * The soft-float powerpc port now supports e500 processors.
1278 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1280 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1281 set of header declarations that are enabled by default, even when other
1282 feature test macros or compiler options such as -std=c99 would otherwise
1283 disable some of those declarations.
1285 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1286 conflict with POSIX. The libbsd-compat library (which was a dummy library
1287 that did nothing) has also been removed.
1289 * Preliminary documentation about Multi-Thread, Async-Signal and
1290 Async-Cancel Safety has been added.
1292 * Change of ABI data structures for s390 and s390x:
1293 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1294 allow for future hardware extensions. All library functions that accept or
1295 return these structures were versioned in order to provide backwards
1296 compatibility with existing code. However, not all cases can be handled
1297 with interface versioning. If an application embeds either structure into
1298 another structure and that structure is passed to another compilation unit
1299 which expects the newer larger-sized object then any access to the new
1300 fields will result in undefined behaviour. Similarly any access to fields
1301 that were moved by the enlarging of the structures will cause undefined
1302 behaviour. To fix the undefined behaviour all objects that are part of the
1303 final in-memory image must agree on the size of structures, and this may
1304 require recompilation.
1308 * The following bugs are resolved with this release:
1310 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1311 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1312 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1313 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1314 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1315 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1316 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1317 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1318 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1319 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1320 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1321 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1322 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1325 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1326 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1327 Distributions can re-enable building and using pt_chown via the new configure
1328 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1329 considerable security risks and should only be used if the distribution
1330 understands and accepts the risks.
1332 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1335 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1336 fixed (Bugzilla #15330).
1338 * Add support for calling C++11 thread_local object destructors on thread
1339 and program exit. This needs compiler support for offloading C++11
1340 destructor calls to glibc.
1342 * Improved worst case performance of libm functions with double inputs and
1345 * Support for priority inherited mutexes in pthread condition variables on
1346 non-x86 architectures.
1348 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1350 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1352 * Optimized string functions for ARM. Implemented by Will Newton and
1355 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1357 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1360 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1361 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1363 * Added a benchmark framework to track performance of functions in glibc.
1365 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1366 It is based on draft TS 18661 and currently enabled as a GNU extension.
1368 * On Linux, the clock function now uses the clock_gettime system call
1369 for improved precision, rather than old times system call.
1371 * Added support for version-3 tz format files. This is needed when using
1372 the tz database release 2013e or later, and affects a few unusual cases --
1373 currently only TZ='America/Godthab' for time stamps after 2037.
1375 * Added new API functions pthread_getattr_default_np and
1376 pthread_setattr_default_np to get and set the default pthread
1377 attributes of a process.
1379 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1380 This may improve lock scaling of existing programs on TSX capable systems.
1381 When the --enable-lock-elision=yes parameter is specified at configure
1382 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1385 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1386 availability). Implemented by Ryan S. Arnold.
1388 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1392 * The following bugs are resolved with this release:
1394 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1395 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1396 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1397 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1398 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1399 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1400 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1401 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1402 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1403 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1404 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1405 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1406 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1407 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1408 14879, 14889, 14893, 14898, 14914.
1410 * Optimization of memcpy for MIPS.
1412 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1413 EMFILE has been fixed (Bugzilla #14889).
1415 * The add-on ports collection is now distributed in the "ports" subdirectory
1416 of the main GNU C Library distribution, rather than separately.
1418 * Port to ARM AArch64 contributed by Linaro.
1420 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1421 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1423 Implemented by Andreas Krebbel.
1425 * The new function secure_getenv allows secure access to the environment,
1426 returning NULL if running in a SUID/SGID process. This function replaces
1427 the internal function __secure_getenv.
1429 * SystemTap static probes have been added into the dynamic linker.
1430 Implemented by Gary Benson.
1432 * Optimizations of string functions strstr, strcasestr and memmem.
1433 Implemented by Maxim Kuvyrkov.
1435 * The minimum Linux kernel version that this version of the GNU C Library
1436 can be used with is 2.6.16.
1438 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1439 powerpc POWER7. Implemented by Will Schmidt.
1441 * New configure option --disable-nscd builds the C library such that it
1442 never attempts to contact the Name Service Caching Daemon (nscd).
1443 New configure option --disable-build-nscd avoids building nscd itself;
1444 this is the default if --disable-nscd is used.
1446 * Improved support for cross-compilation, including cross-testing and
1447 bootstrap builds without a previously built glibc.
1449 * Several testsuite tests are now able to test multiple IFUNC variants of an
1450 interface, rather than just testing the one that would be chooen by
1453 * New configure options --with-bugurl and --with-pkgversion, for
1454 distributors to use to embed their bug-reporting and package version
1455 information in --help and --version output.
1457 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1458 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1459 allows creation of chroots without the procfs mounted on /proc.
1461 * The `crypt' function now fails if passed salt bytes that violate the
1462 specification for those values. On Linux, the `crypt' function will
1463 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1464 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1465 when the mode is enabled.
1467 * The `clock_*' suite of functions (declared in <time.h>) is now available
1468 directly in the main C library. Previously it was necessary to link with
1469 -lrt to use these functions. This change has the effect that a
1470 single-threaded program that uses a function such as `clock_gettime' (and
1471 is not linked with -lrt) will no longer implicitly load the pthreads
1472 library at runtime and so will not suffer the overheads associated with
1473 multi-thread support in other code such as the C++ runtime library.
1475 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1480 * The following bugs are resolved with this release:
1482 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1483 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1484 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1485 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1486 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1487 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1488 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1489 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1490 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1491 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1492 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1493 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1494 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1495 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1496 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1497 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1498 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1499 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1500 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1501 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1502 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1503 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1506 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1507 configuring glibc with:
1508 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1509 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1510 Implemented by H.J. Lu.
1514 + define static_assert
1516 + do not declare gets
1518 + declare at_quick_exit and quick_exit also for ISO C11
1520 + aligned_alloc. NB: The code is deliberately allows the size parameter
1521 to not be a multiple of the alignment. This is a moronic requirement
1522 in the standard but it is only a requirement on the caller, not the
1525 + timespec_get added
1527 + uchar.h support added
1529 + CMPLX, CMPLXF, CMPLXL added
1531 Implemented by Ulrich Drepper.
1533 * Support for the IA-64 has been moved to ports.
1535 * Remove support for anything but ELF binary format
1537 * Checking versions of poll, ppoll added.
1538 Implemented by Ulrich Drepper.
1540 * More generic and 64-bit performance optimizations to math functions.
1541 Implemented by Ulrich Drepper.
1543 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1544 headers and functions available at compile time as they were before
1545 version 2.14. This option will be removed at some time in the future
1546 after the TI-RPC library becomes fully sufficient for the needs of
1547 existing applications.
1549 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1550 Note that glibc is not expected to work with any Linux kernel version
1553 * New header <sys/auxv.h> and function getauxval allowing easy access to
1554 the AT_* key-value pairs passed from the Linux kernel. The header also
1555 defines the HWCAP_* bits associated with the AT_HWCAP key.
1557 * New locales: mag_IN
1559 * New configure option --enable-systemtap builds SystemTap static probes
1560 into libc for setjmp and longjmp and into libpthread for various operations.
1561 So far the setjmp/longjmp probes and some of the libpthread probes are
1562 provided only for i*86 and x86_64.
1563 Implemented by Roland McGrath and Rayson Ho.
1565 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1567 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1570 * More optimized functions for SPARC. Implemented by David S. Miller.
1572 * Improved support for cross-compilation, especially bootstrap builds
1573 without a previously built glibc.
1575 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1576 Chris Metcalf from Tilera.
1578 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1579 now supported for ARM processors.
1581 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1582 as the name of the dynamic linker, to distinguish it from the
1583 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1585 * Support for CRIS has been removed from ports.
1587 * A new class of installed header has been documented for low-level
1588 platform-specific functionality. PowerPC added the first instance with a
1589 function to provide time base register access. Contributed by Tulio
1590 Magno Quites Machado Filho.
1592 * ix86 configurations now install header files that are consistent with
1593 what x86-64 configurations install. These same header files can be used
1594 for -m32, -m64, or -mx32 builds.
1595 Contributed by H.J. Lu.
1597 * Math library bug fixes. A thorough audit of all open math library bugs was
1598 conducted by Joseph Myers. Significant progress was made on many math
1599 library bugs resulting in more accurate exceptions and function results.
1600 Many thanks to all those that contributed including Andreas Jaeger for his
1601 patch review and work on the x87 trigonometric instruction issues.
1603 * Timezone data is no longer installed. Timezone-related binaries and scripts
1604 will continue to be installed. Users should obtain their timezone data from
1605 their distribution provider or from the tzdata package at
1606 <ftp://munnari.oz.au/pub/>.
1610 * The following bugs are resolved with this release:
1612 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1613 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1614 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1615 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1616 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1617 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1618 13484, 13506, 13515, 13523, 13524, 13538, 13540
1620 * New program pldd to list loaded object of a process
1621 Implemented by Ulrich Drepper.
1623 * Add nss_db support back to glibc. No more dependency on Berkeley db
1624 and support for initgroups lookups.
1625 Implemented by Ulrich Drepper.
1627 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1628 Contributed by HJ Lu.
1630 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1631 Contributed by HJ Lu.
1633 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1634 on x86-32 and x86-64.
1635 Contributed by Liubov Dmitrieva.
1637 * Optimized strchr and strrchr for SSE on x86-32.
1638 Contributed by Liubov Dmitrieva.
1640 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1641 for x86-64 and x86-32.
1642 Contributed by Liubov Dmitrieva.
1644 * New interfaces: scandirat, scandirat64
1645 Implemented by Ulrich Drepper.
1647 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1648 Implemented by Ulrich Drepper.
1650 * nscd now also caches the netgroup database.
1651 Implemented by Ulrich Drepper.
1653 * Integrate libm with gcc's -ffinite-math-only option.
1654 Implemented by Ulrich Drepper.
1656 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1657 to math functions. Implemented by Ulrich Drepper.
1659 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1660 Implemented by Ulrich Drepper.
1662 * New Linux interfaces: process_vm_readv, process_vm_writev
1664 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1665 Implemented by Ulrich Drepper.
1667 * Optimized nearbyint and strcasecmp for PPC.
1668 Implemented by Adhemerval Zanella.
1670 * New locales: bho_IN, unm_US, es_CU, ta_LK
1674 * The following bugs are resolved with this release:
1676 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1677 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1678 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1679 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1680 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1681 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1682 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1683 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1684 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1685 12795, 12811, 12813, 12814, 12841
1687 * The RPC implementation in libc is obsoleted. Old programs keep working
1688 but new programs cannot be linked with the routines in libc anymore.
1689 Programs in need of RPC functionality must be linked against TI-RPC.
1690 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1692 Visible changes of this change include (obviously) the inability to link
1693 programs using RPC functions without referencing the TI-RPC library and the
1694 removal of the RPC headers from the glibc headers.
1695 Implemented by Ulrich Drepper.
1697 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1698 syncfs, setns, sendmmsg
1700 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1701 yue_HK, lij_IT, mhr_RU
1703 * New encodings: CP770, CP771, CP772, CP773, CP774
1705 * New program sotruss to trace calls through PLTs
1706 Implemented by Ulrich Drepper.
1708 * The malloc hook implementation is marked deprecated and will be removed
1709 from the default implementation in the next version. The design never
1710 worked ever since the introduction of threads. Even programs which do
1711 not create threads themselves can use multiple threads created internally.
1715 * The following bugs are resolved with this release:
1717 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1718 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1719 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1720 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1723 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1725 * POWER7 optimizations: memset, memcmp, strncmp
1727 * New optimized string functions for x86-64: strnlen (SSE2),
1728 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1729 Implemented by Ulrich Drepper.
1733 * The following bugs are resolved with this release:
1735 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1736 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1737 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1738 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1739 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1740 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1741 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1742 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1744 * New interfaces: pthread_getname_np, pthread_setname_np
1746 * New Linux interface: recvmmsg
1748 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1750 * The dynamic linker now recognizes supported ABI versions from the
1751 EI_ABIVERSION field in the ELF header.
1752 Implemented by Ulrich Drepper.
1754 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1755 will not be used to fill in password fields in the passwd.byname replies.
1756 Instead it is used to synthesize the shadow.byname table, should it be
1757 missing. This is a useful mode in some installations involving Solaris.
1758 Implemented by Ulrich Drepper.
1760 * New locales: kok_IN, sq_MK, cv_RU
1764 * The following bugs are resolved with this release:
1766 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1767 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1768 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1769 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1770 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1771 10789, 10817, 10823, 10840, 10847
1773 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1775 Implemented by Ulrich Drepper.
1777 * Checking version of longjmp added that fails if an uninitialized stack
1778 frame would be created. Implemented by Ulrich Drepper.
1780 * STT_GNU_IFUNC is now supported in static executables.
1781 Implemented by H.J. Lu.
1783 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1785 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1786 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1787 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1788 Contributed by H.J. Lu.
1790 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1791 Implemented by Ulrich Drepper.
1793 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1795 Contributed by H.J. Lu.
1797 * Support for fma instruction in AVX on x86-64.
1798 Implemented by H.J. Lu and Ulrich Drepper.
1800 * AVX support in x86-64 auditing support in ld.so.
1801 Implemented by H.J. Lu.
1803 * STB_GNU_UNIQUE support added.
1804 Implemented by Ulrich Drepper.
1806 * Implement second fallback mode for optimized DNS lookup for even more
1807 broken environments. If two requests from the same port are not
1808 handled correctly close the socket and open a new one before sending
1809 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1810 can be used to select this mode right away, instead of rediscovering the
1811 necessity is every process again.
1812 Implemented by Ulrich Drepper.
1814 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1815 Implemented by Adam Tkac.
1817 * Optimized iconv conversions for S390x.
1818 Implemented by Andreas Krebbel.
1820 * Using condvars with PI mutexes is now more efficient due to kernel
1821 support for requeueing to PI futexes. NPTL support added for x86-64.
1822 Implemented by Ulrich Drepper.
1824 * New locales: ps_AF, my_MM
1828 * The following bugs are resolved with this release:
1830 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1831 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1832 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1833 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1834 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1836 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1837 Implemented by Ulrich Drepper.
1839 * New Linux interfaces: accept4, fallocate, fallocate64.
1840 Implemented by Ulrich Drepper.
1842 * Correct declarations of string function when used in C++ code. This
1843 could lead to compile errors for invalid C++ code.
1845 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1848 * New POSIX 2008 interface: psiginfo
1849 Implemented by Ulrich Drepper.
1851 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1852 Implemented by Ulrich Drepper.
1854 * Support for selecting between multiple function definitions at runtime
1855 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1857 * The libcrypt library can now use the hash function implementations in
1858 NSS. Implemented by Ulrich Drepper.
1860 * The malloc implementation can be compiled to be less memory efficient
1861 but higher performing in multi-threaded programs.
1862 Implemented by Ulrich Drepper.
1864 * New locales: nan_TW@latin, ks_IN
1866 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1867 Implemented by Ulrich Drepper.
1869 * Extended printf hook support. It is possible to use user-defined types
1870 and extend existing format specifiers.
1871 Implemented by Ulrich Drepper.
1873 * Handling for group shadow files has been added.
1874 Implemented by Ulrich Drepper.
1876 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1877 servers (the case, e.g., for some people using the built-in DNS
1878 server in ADSL modems/routers). There is a once-per-process timeout
1879 in case of a broken server. To avoid it, users can run nscd or put
1880 'options single-request' in /etc/resolv.conf.
1881 Implemented by Ulrich Drepper.
1885 * The following bugs are resolved with this release:
1887 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1888 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1889 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1890 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1891 6968, 6974, 6980, 6995, 7008, 7009, 7029
1893 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1894 up at the same time. Implemented by Ulrich Drepper.
1896 * TLS descriptors for LD and GD on x86 and x86-64.
1897 Implemented by Alexandre Oliva.
1899 * getaddrinfo now handles DCCP and UDPlite.
1900 Implemented by Ulrich Drepper.
1902 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1903 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1904 Implemented by Ulrich Drepper.
1906 * New implementation of memmem, strstr, and strcasestr which is O(n).
1907 Implemented by Eric Blake.
1909 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1911 * Implement "e" option for popen to open file descriptor with the
1912 close-on-exec flag set. Implemented by Ulrich Drepper.
1914 * Implement "b" mode for fmemopen. In this mode writes writes don't
1915 implicitly add a NUL byte and seeks from the end of the buffer really
1916 use the buffer end, not the string length as the basis.
1917 Implemented by Ulrich Drepper.
1919 * Many functions, exported and internal, now atomically set the close-on-exec
1920 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1922 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1924 Implemented by Pravin Satpute.
1926 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1930 * The following bugs are resolved with this release:
1932 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1933 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1934 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1935 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1936 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1937 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1938 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1940 * New locales: bo_CN, bo_IN, shs_CA.
1942 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1944 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1945 Implemented by Pravin Satpute.
1947 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1949 * nscd caches now all timeouts for DNS entries
1950 Implemented by Ulrich Drepper.
1952 * nscd is more efficient and wakes up less often.
1953 Implemented by Ulrich Drepper.
1955 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1956 vdprintf, and obstack_vprintf.
1957 Implemented by Jakub Jelinek.
1959 * Faster memset for x86-64.
1960 Implemented by Harsha Jagasia and H.J. Lu.
1962 * Faster memcpy on x86.
1963 Implemented by Ulrich Drepper.
1965 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1966 Implemented by Ulrich Drepper.
1968 * Faster sqrt and sqrtf implemention for some PPC variants.
1969 Implemented by Steven Munroe.
1973 * The following bugs are resolved with this release:
1975 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1976 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1977 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1978 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1979 5071, 5103, 5104, 5112, 5113, 5184, 5186
1981 * More checking functions: fread, fread_unlocked, open*, mq_open.
1982 Implemented by Jakub Jelinek and Ulrich Drepper.
1984 * Extend fortification to C++. Implemented by Jakub Jelinek.
1986 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1987 by not recognizing 'a' as a modifier when those specs are requested.
1988 Implemented by Jakub Jelinek.
1990 * PPC optimizations to math and string functions.
1991 Implemented by Steven Munroe.
1993 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1994 options to be passed. Implemented by Ulrich Drepper.
1996 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1998 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1999 Implemented by Ulrich Drepper.
2001 * Handle private futexes in the NPTL implementation.
2002 Implemented by Jakub Jelinek and Ulrich Drepper.
2004 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2005 Implemented by Roland McGrath and Ulrich Drepper.
2007 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2009 * SHA-256 and SHA-512 based password encryption.
2010 Implemented by Ulrich Drepper.
2012 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2013 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2016 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2017 Implemented by Ulrich Drepper.
2021 * The following bugs are resolved with this release:
2023 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2024 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2025 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2026 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2027 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2028 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2029 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2032 * New Linux interfaces: epoll_pwait, sched_getcpu.
2034 * New generic interfaces: strerror_l.
2036 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2040 * The following bugs are resolved with this release:
2042 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2043 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2044 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2045 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2046 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2047 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2048 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2049 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2050 3225, 3251, 3252, 3253, 3273
2052 * For Linux, the sorting of addresses returned by getaddrinfo now also
2053 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2054 Implemented by Ulrich Drepper.
2056 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2057 Implemented by Ulrich Drepper.
2059 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2061 * New iconv module for MIK. Contributed by Alexander Shopov.
2063 * For sites with broken group and/or passwd database, the auto-propagate
2064 option of nscd can prevent creating ID lookup entries from the results
2065 of a name lookup and vice versa. This usually is no problem but some
2066 site might have problems with the default behavior.
2067 Implemented by Ulrich Drepper.
2069 * Iterating over entire database in NIS can be slow. With the
2070 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2071 to trade time for memory. The entire database will be read at once.
2072 Implemented by Ulrich Drepper.
2074 * The interfaces introduced in RFC 3542 have been implemented by
2077 * Support for the new ELF hash table format was added by Ulrich Drepper.
2079 * Support for priority inheritance mutexes added by Jakub Jelinek and
2082 * Support for priority protected mutexes added by Jakub Jelinek.
2084 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2085 or_IN, csb_PL, fy_NL, sr_ME.
2089 * More overflow detection functions.
2091 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2092 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2094 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2095 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2096 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2097 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2098 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2099 by Masahide Washizawa.
2101 * It is now possible to install audit libraries for the dynamic linker using
2102 LD_AUDIT. Implemented by Ulrich Drepper.
2104 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2105 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2106 For a libc and libpthread that works well on Linux 2.4 kernels, we
2107 recommend using the stable 2.3 branch.
2109 * The new function open_wmemstream acts like open_memstream,
2110 but uses a wchar_t wide character buffer.
2112 * The new function ppoll is an improved version of poll, similar to pselect.
2114 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2115 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2116 renameat, unlinkat, linkat, symlinkat, readlinkat.
2118 * New Linux kernel system calls: unshare,
2119 inotify_init, inotify_add_watch, inotify_rm_watch.
2121 * The euidaccess function is now also known by the alias eaccess,
2122 for compatibility with some other systems.
2124 * Timezone data updated to 2006b version.
2128 * The following bugs are resolved with this release:
2130 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2131 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2132 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2133 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2134 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2135 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2137 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2139 * As of this release, GCC 4 can be used to compile the C Library.
2141 * Timezone data updated to 2005m version.
2145 * The following bugs are resolved with this release:
2147 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2148 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2149 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2150 777, 787, 821, 822, 823, 825
2152 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2156 * Support for RFC 3678. Real implementations exist only for Linux so far.
2157 Implemented by Ulrich Drepper.
2159 * nscd can now cache entries persistently. Expiring entries are reloaded.
2160 For speedups the cache can be shared in memory with client processes.
2161 Implemented by Ulrich Drepper.
2163 * nscd can now perform SELinux checks.
2164 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2166 * getaddrinfo queries are now cached. Canonical name lookup is performed
2168 Implemented by Ulrich Drepper.
2170 * The nothrow function attribute is used when headers are used by gcc when
2171 compiling C code. This can avoid significant amounts of exception
2174 * The malloc functions perform more error checking and are stricter when
2175 it comes to reacting on errors. The default action is to terminate
2176 the process after showing an error message. Implemented by Ulrich Drepper.
2178 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2179 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2181 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2182 namespaces using the new function dlmopen(). This feature is of course,
2183 like most other dynamic loading functionality, not available in statically
2184 linked applications. Implemented by Ulrich Drepper.
2186 * Low-overhead boundary checking variants of string and some stdio functions
2187 were added. These are to be used in conjunction with a gcc patch by
2188 Jakub Jelinek which adds calls to these functions if possible.
2189 Implemented by Jakub Jelinek and Ulrich Drepper.
2191 * Old code for several operating systems and machine architectures that
2192 have not been in working condition in a long time have been removed from
2193 the main source tree maintained by the GNU C Library's maintainers.
2194 These files are now reside in the separate `ports' source module
2195 that is usable as an add-on when building the library.
2199 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2200 interrogate the dynamic linker, compatible with the Solaris interface.
2202 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2203 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2205 * getifaddrs now uses the netlink interface on Linux to get its information.
2206 Implemented by Thorsten Kukuk.
2208 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2209 Implemented by Ulrich Drepper.
2211 * support for non-executable stacks on x86 has been added. Changes mostly
2214 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2217 * getaddrinfo now performs destination address selection according to
2222 * Thread-safe interfaces for many functions that access locale data
2223 were added in version 2.3, but these features were omitted from NEWS.
2224 Many functions have variants with an `_l' suffix that take a `locale_t'
2225 object as a parameter rather than consulting the current locale.
2226 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2227 create and maintain `locale_t' objects. Additionally, the new function
2228 `uselocale' sets "the current locale" (as used by functions not so
2229 parameterized) set for an individual thread. These features were added
2230 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2232 * The functions getresuid, getresgid, setresuid, and setresgid, which
2233 have long been available on Linux, are now declared in <unistd.h>
2234 and are now also available on the Hurd.
2236 * ELF thread-local storage support (TLS) now works on x86-64.
2238 * The new dynamic string token $LIB is expanded in shared library names.
2239 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2241 * Aldy Hernandez contributed complete software floating point support for
2242 PowerPC machines with no FPU.
2244 * fexecve is implemented on Linux.
2246 * The `btowc' function should work at least twice as fast due to
2247 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2249 * With approriate thread add-ons cancelable functions are now implemented
2250 in libc.so as well. No need to call the function in libpthread. This
2251 change allowed to finally disable the incorrect and expensive handling
2252 of weak definition in ld.so.
2254 * Yet more PLT entries in libc.so have been removed. We finally arrived
2255 at the bare minimum. Startup times improved appropriately.
2257 * Support for the new Linux/x86 system call interface was added. The
2258 AT_SYSINFO auxiliary vector entry is recognized and handled.
2262 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2265 * iconv (the program and the interface) now accepts empty names (excluding
2266 options like //TRANSLIT) to mean "use charset of current locale".
2268 * localedef can now transliterate characters in strings which are not in
2269 the provided charmap. The information from the input locale is used.
2271 * Prelinking support was added for ELF targets. This requires additional
2272 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2274 * Read-only stdio streams now use mmap to speed up operation by eliminating
2275 copying and buffer underflows. To use add 'm' to the mode string of
2276 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2278 * The malloc functions were completely rewritten by Wolfram Gloger based
2279 on Doug Lea's malloc-2.7.0.c.
2281 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2282 implementation of regex.
2284 * Bruno Haible upgraded the iconv and locale implementation to support
2287 * Contents of the LC_* and LANG environment variables in the CEN style are
2288 not recognized anymore. It never was used. Change by Ulrich Drepper.
2290 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2291 thread-local storage (TLS) ABI on some platforms.
2292 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2294 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2295 EUC-JISX0213, and TSCII.
2297 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2298 BSD-compatible interface for getting all network interface addresses.
2299 Implementation for IPv4 by Roland McGrath.
2301 * Loading of locale data is faster due to the introduction of a locale
2302 archive. Implemented by Roland McGrath and Ulrich Drepper.
2304 * Startup times are significantly reduced by not using exported functions
2305 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2308 * Steven Munroe contributed a port to PowerPC64/Linux.
2312 * The Hurd now uses the GNU libio implementation of stdio rather than the
2313 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2315 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2316 with the same behavior as the Linux system call of the same name.
2320 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2321 128-bit long double format.
2323 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2324 IBM1161, and IBM1162 charsets.
2326 * Andreas Jaeger contributed a port to x86-64/Linux.
2328 * Peter Bruin contributed a port to PowerPC/Hurd.
2330 * libc functions using I/O streams now can handle wide-oriented streams
2333 * optimizations in the dynamic linker. Binaries created by recent binutils
2334 versions start up quicker due to reduced time spent on relocations.
2336 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2340 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2341 asinh, atanh, j0 for the 128-bit long double format.
2343 * Bruno Haible updated all the code handling Unicode in some form to
2344 support Unicode 3.1.
2346 * Speed of regex for single-byte locales is back to previous levels.
2347 Patch by Isamu Hasegawa.
2349 * Alpha, SPARC, and IA-64 now also using floating stacks.
2351 * Startup time of internationalized applications greatly improved through
2352 iconv cache. Use iconvconfig to generate the cache file.
2353 Contributed by Ulrich Drepper.
2355 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2356 severe performance problems. Patch by David Mosberger.
2358 * The Hurd port got a lot more functionality like AIO, various stdio
2359 extensions, etc. Mainly done by Roland McGrath.
2361 * mtrace can now lookup symbols in shared libraries.
2365 * Intel's IA-64 math library is largely integrated. It provides fast and
2366 accurate implementatations for most basic and standard math functions
2367 in float, double, and long double format.
2369 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2370 and asin for the 96-bit long double format and asin, log, tan for the
2371 128-bit long double format.
2373 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2374 The basic double functions exist today. Contributed by Abraham Ziv
2375 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2376 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2378 * An asynchronous name lookup library was added. The interface is designed
2379 after POSIX AIO. The proposal was circulated beforehand to get comments.
2380 No negative ones came in. Implemented by Ulrich Drepper.
2382 * Port to S390/64bit contributed by Martin Schwidefsky
2383 <schwidefsky@de.ibm.com>.
2385 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2386 of functions for Linux/IA-64.
2388 * The RPC code is now thread safe. Threads can now use the same service
2389 of different services at the same time. Patch by Eric Norum
2390 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2392 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2393 family of functions for Linux/S390.
2395 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2396 of functions for Linux/x86.
2398 * Port to Linux/CRIS contributed by Axis Communications.
2402 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2403 we can now check for namespace violations and missing declarations. The
2404 result is that almost all headers are now Unix-compliant (as defined in
2405 the upcoming XPG6). The negative side is that some programs might need
2406 corrections, too, if they depend on the incorrect form of the headers in
2407 previous versions which defined too many symbols and included too many
2410 * regex now handles multibyte character sets correctly.
2411 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2413 * iconv (the program) does now conform to the upcoming XPG6 and handles
2414 charmaps. Instead of the charset names the path of charmaps can be
2415 provided and the conversion happens based on this data.
2416 Contributed by Ulrich Drepper.
2418 * The locale program now provides detailed information about the installed
2423 only lists the names of the supported locales
2427 provides details such as country, language, and codeset name.
2428 Contributed by Ulrich Drepper.
2432 * The gencat program now parses the input file according to the charset
2433 selected by the LC_CTYPE category. This is important for stateful
2434 character sets. To make generating catalogs easier there is a way
2435 to overwrite the charset selected by the locale: before the first
2436 message or $ quote line the catalog can contain a line like
2438 $ codeset=ISO-8859-2
2440 to select the charset (ISO-8859-2 in this case).
2442 Implemented by Shinya Hanataka and Ulrich Drepper.
2444 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2445 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2446 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2448 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2449 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2451 * The LANGUAGE environment variable is now ignored unless the locale is
2452 changed from the default "C" locale.
2454 * The usual bug fixes.
2458 * Greg McGary added runtime support for bounds checking using gcc's
2459 new -fbounded-pointers option. ix86 target is complete. PowerPC
2462 * Thorsten Kukuk added secure mode support to nscd.
2464 * The Berkeley db libraries have been removed.
2466 Related, the nss_db module is now in a separate package since it
2467 obviously requires a database library being available.
2469 * Wide character I/O streams implemented by Ulrich Drepper.
2471 * Functions from the extended socket API added by Ulrich Drepper.
2473 * Functions feenableexcept and fedisableexcept to control the
2474 behaviour of individual exceptions have been added by Andreas Jaeger.
2476 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2478 * The resolver code has been updated from bind 8.2.3-T5B which supports
2479 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2482 This change could in some situations effect backward compatibility. Since
2483 now `_res' is a thread-local instead of a global variable, modifying it
2484 in one thread does not have any effect in other threads.
2486 The resolver library was also extended to allow IPv6 as the transport
2487 protocol for the requests. This work was done by Stig Venaas.
2489 * Compatibility code for K&R C compilers has been removed from the
2490 header files. A ISO C compiler is needed to use the library
2491 (conforming to either C89 or C99 standard).
2493 * Complete rewrite of the localedef program to support multibyte character
2494 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2495 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2496 Implemented by Ulrich Drepper.
2498 Bruno Haible significantly improved the generation and use of the data
2499 structures for the wide character tables.
2501 * Plural handling in gettext implemented by Ulrich Drepper.
2503 * The utmp daemon has been removed.
2505 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2507 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2510 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2512 * POSIX barriers implemented by Kaz Kylheku.
2514 * POSIX spawn function family implemented by Ulrich Drepper.
2516 * POSIX spinlocks are now available.
2518 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2520 * the configure option --enable-kernel=X.Y.Z allows to strip out
2521 compatibility for kernel versions before X.Y.Z. This is currently only
2522 implemented for Linux.
2524 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2525 field sin6_scope_id. This means that all programs using IPv6 should be
2526 recompiled. Don't expect binary compatibility with previous glibc
2529 * various conversion modules for IBM character sets contributed by
2532 * IA-64 port by Jes Sorensen and HJ Lu.
2546 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2548 * New xdr functions are added; some rpc functions are now 64bit clean.
2550 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2552 * Fixed known incompatibilities with glibc 2.0.
2554 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2556 * Optimized a number of functions (especially the ELF dynamic loader).
2558 * Update timezone data files.
2560 * lots of charmaps corrections
2562 * some new locale definitions and charmaps
2567 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2568 conform to POSIX member type requirements. Symbol versions have been
2569 adjusted as needed within the library, and for direct use by applications,
2570 but there is potential for problems if third-party libraries use
2571 struct timeval as part of their interface. This does not present
2572 a problem for X and other "essential" system libraries.
2574 * An additional locale model to support C++ Standard Library locale
2575 model and probably more was implemented by Ulrich Drepper.
2577 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2580 * Miles Bader provided the `argp' function family to support hierachical
2581 command line argument parsing, layered on top of getopt.
2583 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2585 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2588 * scanf recognizes the %a and %A format for scanning floating point numbers.
2590 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2591 information and interfaces for the available integer types.
2593 * about 130 new math functions were added to implement the ISO C9x math
2596 * the new header <complex.h> contains definitions of the complex math
2597 functions from ISO C 9X.
2599 * the new header <tgmath.h> defines generic macros to use complex or
2600 real valued functions.
2602 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2604 * Andreas Jaeger provided a test suite for the math library.
2606 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2608 * Ulrich Drepper added character set conversion functions (iconv).
2610 * Optimized string functions have been added.
2612 * The localedata addon is now part of glibc.
2614 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2616 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2617 daemon for NSS (nscd).
2619 Missing a better place here are some numbers on improvements. Under
2620 Linux 2.1.125 un-tar-ing the kernel sources takes
2624 using local files 12.19s 6.88s 22.91s
2626 using NIS 13.92s 8.91s 26.34s
2628 using NIS & nscd 10.37s 7.34s 25.30s
2630 using NIS+ 27.57s 30.37s 640.46s
2632 using NIS+ & nscd 10.25s 7.83s 26.51s
2634 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2636 Keep in mind that non-namelookup related operations dominate above times.
2637 It was just a common complain that using NIS+ unpacking the kernel is
2640 [1] The old nscd implementation is not available anymore since it was
2641 distributed with glibc up to version 2.0.98 and thus is now replaced.
2643 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2645 * Mark Kettenis provided a Hesiod NSS module.
2647 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2648 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2650 * rcmd can now handle netgroups (Dick Streefland).
2652 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2655 * Support for the IPv6 protocol has been added to the socket API, as per the
2656 latest draft standards.
2658 * Support for Linux 2.2 has been added.
2660 * Interface changes relative to the latest 2.0.x release:
2661 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2662 addseverity NEW: Unix98
2663 alphasort64 NEW: LFS
2664 argp_err_exit_status NEW: argp, GNU ext
2665 argp_error NEW: argp, GNU ext
2666 argp_failure NEW: argp, GNU ext
2667 argp_help NEW: argp, GNU ext
2668 argp_parse NEW: argp, GNU ext
2669 argp_program_bug_address NEW: argp, GNU ext
2670 argp_program_version NEW: argp, GNU ext
2671 argp_program_version_hook NEW: argp, GNU ext
2672 argp_state_help NEW: argp, GNU ext
2673 argp_usage NEW: argp, GNU ext
2674 authdes_create NEW: Secure RPC
2675 authdes_getucred NEW: Secure RPC
2676 authdes_pk_create NEW: Secure RPC
2677 backtrace NEW: GNU ext.
2678 backtrace_symbols NEW: GNU ext.
2679 backtrace_symbols_fd NEW: GNU ext.
2681 cacosf NEW: ISO C 9x
2682 cacosh NEW: ISO C 9x
2683 cacoshf NEW: ISO C 9x
2684 cacoshl NEW: ISO C 9x
2685 cacosl NEW: ISO C 9x
2692 casinf NEW: ISO C 9x
2693 casinh NEW: ISO C 9x
2694 casinhf NEW: ISO C 9x
2695 casinhl NEW: ISO C 9x
2696 casinl NEW: ISO C 9x
2698 catanf NEW: ISO C 9x
2699 catanh NEW: ISO C 9x
2700 catanhf NEW: ISO C 9x
2701 catanhl NEW: ISO C 9x
2702 catanl NEW: ISO C 9x
2703 cbc_crypt NEW: Secure RPC
2707 ccoshf NEW: ISO C 9x
2708 ccoshl NEW: ISO C 9x
2714 cimagf NEW: ISO C 9x
2715 cimagl NEW: ISO C 9x
2716 clearerr_locked REMOVED
2717 clntunix_create NEW: sunrpc ext
2719 clog10 NEW: ISO C 9x
2720 clog10f NEW: ISO C 9x
2721 clog10l NEW: ISO C 9x
2731 cprojf NEW: ISO C 9x
2732 cprojl NEW: ISO C 9x
2734 crealf NEW: ISO C 9x
2735 creall NEW: ISO C 9x
2740 csinhf NEW: ISO C 9x
2741 csinhl NEW: ISO C 9x
2744 csqrtf NEW: ISO C 9x
2745 csqrtl NEW: ISO C 9x
2749 ctanhf NEW: ISO C 9x
2750 ctanhl NEW: ISO C 9x
2752 des_setparity NEW: Secure RPC
2753 ecb_crypt NEW: Secure RPC
2754 endutxent NEW: Unix98
2756 exp10f NEW: ISO C 9x
2757 exp10l NEW: ISO C 9x
2761 fattach NEW: STREAMS
2762 fdetach NEW: STREAMS
2766 feclearexcept NEW: ISO C 9x
2767 fegetenv NEW: ISO C 9x
2768 fegetexceptflag NEW: ISO C 9x
2769 fegetround NEW: ISO C 9x
2770 feholdexcept NEW: ISO C 9x
2772 feraiseexcept NEW: ISO C 9x
2773 ferror_locked REMOVED
2774 fesetenv NEW: ISO C 9x
2775 fesetexceptflag NEW: ISO C 9x
2776 fesetround NEW: ISO C 9x
2777 fetestexcept NEW: ISO C 9x
2778 feupdateenv NEW: ISO C 9x
2779 fflush_locked REMOVED
2783 fgets_unlocked NEW: GNU ext.
2784 fileno_locked REMOVED
2796 fputc_locked REMOVED
2797 fputs_unlocked NEW: GNU ext.
2798 fread_unlocked NEW: GNU ext.
2803 fstatvfs NEW: Unix98
2807 ftruncate64 NEW: LFS
2809 fwrite_unlocked NEW: GNU ext.
2810 gai_strerror NEW: IPv6
2814 getchar_locked REMOVED
2816 getdate_err NEW: Unix98
2817 getdate_r NEW: GNU ext.
2819 getnameinfo NEW: IPv6
2820 getnetname NEW: Secure RPC
2821 getpmsg NEW: STREAMS
2822 getpt NEW: Unix98 PTY
2823 getrlimit64 NEW: LFS
2824 getutxent NEW: Unix98
2825 getutxid NEW: Unix98
2826 getutxline NEW: Unix98
2827 glob64 NEW: GNU ext.
2828 globfree64 NEW: GNU ext.
2829 gnu_get_libc_release NEW: GNU ext.
2830 gnu_get_libc_version NEW: GNU ext.
2831 grantpt NEW: Unix98 PTY
2832 host2netname NEW: Secure RPC
2834 iconv_close NEW: iconv
2835 iconv_open NEW: iconv
2836 if_freenameindex NEW: IPv6
2837 if_indextoname NEW: IPv6
2838 if_nameindex NEW: IPv6
2839 if_nametoindex NEW: IPv6
2840 in6addr_any NEW: IPv6
2841 in6addr_loopback NEW: IPv6
2842 inet6_isipv4mapped NEW: IPv6
2843 isastream NEW: STREAMS
2844 iswblank NEW: GNU ext.
2845 key_decryptsession NEW: Secure RPC
2846 key_decryptsession_pk NEW: Secure RPC
2847 key_encryptsession NEW: Secure RPC
2848 key_encryptsession_pk NEW: Secure RPC
2849 key_gendes NEW: Secure RPC
2850 key_get_conv NEW: Secure RPC
2851 key_secretkey_is_set NEW: Secure RPC
2852 key_setnet NEW: Secure RPC
2853 key_setsecret NEW: Secure RPC
2854 llrint NEW: ISO C 9x
2855 llrintf NEW: ISO C 9x
2856 llrintl NEW: ISO C 9x
2857 llround NEW: ISO C 9x
2858 llroundf NEW: ISO C 9x
2859 llroundl NEW: ISO C 9x
2864 lrintf NEW: ISO C 9x
2865 lrintl NEW: ISO C 9x
2866 lround NEW: ISO C 9x
2867 lroundf NEW: ISO C 9x
2868 lroundl NEW: ISO C 9x
2870 makecontext NEW: Unix98
2871 mempcpy NEW: GNU ext.
2874 modify_ldt NEW: kernel
2878 nearbyint NEW: ISO C 9x
2879 nearbyintf NEW: ISO C 9x
2880 nearbyintl NEW: ISO C 9x
2881 netname2host NEW: Secure RPC
2882 netname2user NEW: Secure RPC
2883 nexttoward NEW: ISO C 9x
2884 nexttowardf NEW: ISO C 9x
2885 nexttowardl NEW: ISO C 9x
2889 passwd2des NEW: Secure RPC
2891 pow10f NEW: GNU ext.
2892 pow10l NEW: GNU ext.
2895 printf_size NEW: GNU ext.
2896 printf_size_info NEW: GNU ext.
2897 profil_counter REMOVED
2898 pthread_mutexattr_getkind_np REPLACED
2899 pthread_mutexattr_setkind_np REPLACED
2900 ptsname NEW: Unix98 PTY
2901 ptsname_r NEW: Unix98 PTY
2903 putchar_locked REMOVED
2904 putgrent NEW: GNU ext.
2906 putpmsg NEW: STREAMS
2907 pututxline NEW: Unix98
2911 readdir64_r NEW: LFS
2912 remquo NEW: ISO C 9x
2913 remquof NEW: ISO C 9x
2914 remquol NEW: ISO C 9x
2916 roundf NEW: ISO C 9x
2917 roundl NEW: ISO C 9x
2919 scalbln NEW: ISO C 9x
2920 scalblnf NEW: ISO C 9x
2921 scalblnl NEW: ISO C 9x
2923 sendfile NEW: kernel
2924 setcontext NEW: Unix98
2925 setrlimit64 NEW: LFS
2926 setutxent NEW: Unix98
2928 sigignore NEW: Unix98
2929 sigqueue NEW: POSIX.1b
2930 sigrelse NEW: Unix98
2931 sigset NEW: POSIX.1b
2932 sigtimedwait NEW: POSIX.1b
2933 sigwaitinfo NEW: POSIX.1b
2934 sincos NEW: GNU ext.
2935 sincosf NEW: GNU ext.
2936 sincosl NEW: GNU ext.
2940 strcasestr NEW: GNU ext.
2941 strtoimax NEW: ISO C 9x
2942 strtoumax NEW: ISO C 9x
2943 strverscmp NEW: GNU ext.
2944 svcauthdes_stats NEW: Secure RPC
2945 svcunix_create NEW: sunrpc etx
2946 svcunixfd_create NEW: sunrpc ext
2947 swapcontext NEW: Unix98
2948 tcgetsid NEW: Unix98 PTY
2949 tdestroy NEW: GNU ext.
2950 tgamma NEW: ISO C 9x
2951 tgammaf NEW: ISO C 9x
2952 tgammal NEW: ISO C 9x
2956 truncf NEW: ISO C 9x
2957 truncl NEW: ISO C 9x
2959 unlockpt NEW: Unix98 PTY
2960 updwtmpx NEW: Unix98
2961 user2netname NEW: Secure RPC
2962 utmpxname NEW: Unix98
2963 versionsort NEW: GNU ext.
2964 versionsort64 NEW: GNU ext.
2966 wcscasecmp NEW: GNU ext.
2967 wcsncasecmp NEW: GNU ext.
2968 wcsnlen NEW: GNU ext.
2969 wcstoimax NEW: ISO C 9x
2970 wcstoll NEW: ISO C 9x
2971 wcstoull NEW: ISO C 9x
2972 wcstoumax NEW: ISO C 9x
2974 wordexp NEW: POSIX.2
2975 wordfree NEW: POSIX.2
2976 write_profiling REMOVED
2977 xdecrypt NEW: Secure RPC
2978 xdr_authdes_cred NEW: Secure RPC
2979 xdr_authdes_verf NEW: Secure RPC
2980 xdr_cryptkeyarg NEW: Secure RPC
2981 xdr_cryptkeyarg2 NEW: Secure RPC
2982 xdr_cryptkeyres NEW: Secure RPC
2983 xdr_getcredres NEW: Secure RPC
2984 xdr_key_netstarg NEW: Secure RPC
2985 xdr_key_netstres NEW: Secure RPC
2986 xdr_keybuf NEW: Secure RPC
2987 xdr_keystatus NEW: Secure RPC
2988 xdr_netnamestr NEW: Secure RPC
2989 xdr_sizeof NEW: Secure RPC
2990 xdr_unixcred NEW: sunrpc ext
2991 xencrypt NEW: Secure RPC
2992 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3003 * inet_ntoa is thread-safe
3005 * updwtmp is moved from libutil to libc
3007 * rewrite of cbrt function
3009 * update of timezone data
3023 * add atoll function
3025 * fix complex problems in Berkeley DB code
3027 * fix math functions
3031 * fixed lots of header problems (especially Linux/GNU specific)
3033 * dynamic loader preserves all registers
3035 * Roland McGrath provided support for handling of auxiliary objects in
3036 the ELF dynamic loader.
3038 * support for parallel builds is improved
3042 * GNU extensions are no longer declared by default. To enable them you
3043 must define the macro `_GNU_SOURCE' in your program or compile with
3046 * The library has changed from using GNU ld symbol aliases to using weak
3047 symbols where available. The ELF object file format supports weak
3048 symbols; GNU ld also supports weak symbols in the a.out format. (There
3049 is also now support for other GNU ld extensions in ELF. Use the
3050 `--with-elf' option to configure to indicate you have ELF, and
3051 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3052 of many files which contained only symbol aliases, reducing the size of
3053 the source and the compiled library; many other files were renamed to
3054 less cryptic names previously occupied by the symbol alias files.
3055 There is a new header file <elf.h> for programs which operate on
3056 files in the ELF format.
3058 * Converted to Autoconf version 2, so `configure' has more options.
3059 Run `configure --help' to see the details.
3061 * The library can now be configured to build profiling, highly-optimized
3062 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3063 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3064 `configure' enable building these extra libraries. The shared library is
3065 built by default when using both ELF and GNU ld. When shared libraries
3066 are enabled, the new library `-ldl' is available for arbitrary run-time
3067 loading of shared objects; its interface is defined in <dlfcn.h>. The
3068 new header file <link.h> gives access to the internals of the run-time
3069 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3070 application of same name on other systems and it provides information
3071 about dynamically linked binaries.
3073 * The C library now provides the run-time support code for profiling
3074 executables compiled with `-pg'. Programs can control the profiling code
3075 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3076 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3077 the support for this file format was contributed by David Mosberger-Tang.
3079 * The math code has been replaced with a math library based on fdlibm from
3080 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3081 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3082 functions. The math functions now reside in a separate library, so
3083 programs using them will need to use `-lm' their linking commands.
3085 * John C. Bowman contributed optimized ix87 assembler inline functions.
3087 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3088 mechanism similar to that found in Solaris 2. This is now used for the
3089 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3090 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3091 file controls what services are used for each individual database. This
3092 works by loading shared libraries with names specified in `nsswitch.conf',
3093 so service modules can be changed or added at any time without even
3094 relinking any program. Currently there are the file, db, and NIS based
3095 NSS services available.
3097 * The new functions `strtoq' and `strtouq' parse integer values from
3098 strings, like `strtol' and `strtoul', but they return `long long int' and
3099 `unsigned long long int' values, respectively (64-bit quantities).
3101 * The new functions `strtof' and `strtold' parse floating-point values from
3102 strings, like `strtod', but they return `float' and `long double' values,
3103 respectively (on some machines `double' and `long double' are the same).
3105 * Ulrich Drepper has contributed new implementations of the floating-point
3106 printing and reading code used in the `printf' family of functions and
3107 `strtod', `strtof', and `strtold'. These new functions are perfectly
3108 accurate, and much faster than the old ones.
3110 * The implementation of the POSIX locale model was completely rewritten by
3111 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3112 to compile the POSIX locale definition.
3114 * The former dummy implementations of the strcoll and strxfrm function are
3115 now replaced by fully functional code contributed by Ulrich Drepper. The
3116 collation information comes from the POSIX locale definitions.
3118 * The new header <langinfo.h> defines an interface for accessing
3119 various locale-dependent data (using the locale chosen with `setlocale').
3121 * Ulrich Drepper has contributed a new suite of functions for operation on
3122 wide-character and multibyte-character strings, in <wchar.h>;
3123 and classification and case conversion of wide characters, in <wctype.h>.
3124 These new functions are conforming to the ISO C, Amendement 1 specification.
3126 * There is now a second implementation of the standard I/O library available.
3127 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3128 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3130 * You can now use positional parameter specifications in format strings
3131 for the `printf' and `scanf' families of functions. For example,
3132 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3133 ``Number 6, Mr Jones''. This is mainly useful when providing different
3134 format strings for different languages, whose grammars may dictate
3135 different orderings of the values being printed. To support this
3136 feature, the interface for `register_printf_handler' has changed; see
3137 the header file <printf.h> for details.
3139 * The `printf' and `scanf' families of functions now understand a new
3140 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3141 to group numbers as indicated by the locale; for `scanf' and friends, this
3142 says to accept as valid only a number with all the proper grouping
3143 separators in the right places. In the default "C" locale, numbers are
3144 not grouped; but locales for specific countries will define the usual
3145 conventions (i.e. separate thousands with `,' in the US locale).
3147 * The pgrp functions have been regularized, slightly incompatibly but much
3148 less confusingly. The core functions are now `getpgid' and `setpgid',
3149 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3150 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3151 provided for compatibility. There is no longer an incompatible `getpgrp'
3152 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3154 * The new header file <fts.h> and suite of functions simplify programs that
3155 operate on directory trees. This code comes from 4.4 BSD.
3157 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3158 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3159 NSS scheme used in glibc.
3161 * There is a new malloc debugging hook `__memalign_hook'.
3163 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3164 `unsigned int' in <sys/types.h>. These are for compatibility only and
3165 their use is discouraged.
3167 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3168 done differently, so that it works even without GNU ld.
3170 * New function `euidaccess' checks allowed access to a file like `access',
3171 but using the effective IDs instead of the real IDs.
3173 * The time zone data files have been updated for the latest and greatest
3174 local time conventions of the countries of the world.
3176 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3179 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3180 for formatting floating-point numbers. They are provided only for
3181 compatibility; new programs should use `sprintf' instead. There are
3182 also equivalent function for the `long double' floating-point type and
3183 all functions also exist in a reentrant form.
3185 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3186 functions for maintaining the login-record files (primarily of use to
3187 system programs such as `login'), and convenient functions for
3188 allocating and initializing a pseudo-terminal (pty) device.
3190 * Ulrich Drepper has contributed new support for System V style
3191 shared memory and IPC on systems that support it.
3193 * Ulrich Drepper has contributed several miscellaneous new functions found
3194 in System V: The `hsearch' family of functions provide an effective
3195 implementation of hash tables; `a64l' and `l64a' provide a very simple
3196 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3199 * Ulrich Drepper has contributed new reentrant counterparts for the
3200 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3202 * Ulrich Drepper has contributed new, highly-optimized versions of several
3203 string functions for the i486/Pentium family of processors.
3205 * Ulrich Drepper has updated the Linux-specific code, based largely
3206 on work done in Hongjiu Lu's version of GNU libc for Linux.
3207 The GNU library now supports Linux versions 2.0.10 and later,
3208 using the ELF object file format (i[3456]86-*-linux).
3210 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3212 * David Mosberger-Tang and Richard Henderson have ported the C library
3213 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3214 dynamic linking support for ELF/Alpha.
3216 * Richard Henderson contributed several Alpha optimized assembler function
3217 for arithmetic and string handling.
3219 * Ulrich Drepper has contributed a new set of message catalog functions to
3220 support multiple languages using the <libintl.h> interface, for use with
3221 his new package GNU gettext. Translation volunteers have contributed
3222 catalogs of the library's messages in Spanish, German, and Korean.
3224 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3225 program and the `catgets' function for reading the catalog files it
3226 creates. (The <libintl.h> interface is preferred; we include the
3227 <nl_types.h> interface using `catgets' only for source compatibility with
3228 programs already written to use it.)
3230 * New header file <values.h> gives SVID-compatible names for <limits.h>
3233 * Various new macros, declarations, and small header files for compatibility
3236 * New function `group_member' is a convenient way to check if a process has
3237 a given effective group ID.
3239 * When using GCC 2.7 and later, the socket functions are now declared in a
3240 special way so that passing an argument of type `struct sockaddr_in *',
3241 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3242 `struct sockaddr *' type, does not generate a type-clash warning.
3244 * New function `error' declared in header file <error.h> is a convenient
3245 function for printing error messages and optionally exiting; this is the
3246 canonical function used in GNU programs. The new functions `err', `warn',
3247 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3248 doing the same thing.
3250 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3251 POSIX.2 `glob' function to do ~ and {...} expansion.
3253 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3254 `clearenv' which is used in POSIX.9 is also available.
3256 * New function `getsid' returns session ID number on systems that support it.
3258 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3259 files <db.h> and <mpool.h> provide a rich set of functions for several
3260 types of simple databases stored in memory and in files, and <ndbm.h> is
3261 an old `ndbm'-compatible interface using the `db' functions. Link with
3262 `-ldb' to get these functions.
3264 * New macro `strdupa' copies a string like `strdup', but uses local stack
3265 space from `alloca' instead of dynamic heap space from `malloc'.
3267 * New function `strnlen' is like `strlen' but searches only a given maximum
3268 number of characters for the null terminator. `stpncpy', `strndup' and
3269 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3272 * New function `statfs' in header <sys/statfs.h>.
3274 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3275 provide convenient functions for operating on blocks of null-terminated
3278 * A new suite of functions in <utmp.h> handle all the details of reading
3279 and writing the utmp file.
3281 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3284 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3285 completely POSIX compliant and also implemented the extended functionality
3286 to handle alternate digit representation and alternate era date formats.
3288 * Ulrich Drepper provided an implementation of the `strptime' function
3289 defined in XPG4.2 which transforms a string into a `struct tm' value.
3291 * Paul Eggert provided the tzselect shell script as part of the timezone
3292 code. The shell script makes it easy to select the correct timezone
3295 * The implementation of the malloc family of functions is completely replaced
3296 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3297 The implementation uses the mmap function (if available) and it is
3298 optimized for the use in multi threaded programs.
3300 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3301 functions. This new functionality is usable by specifying a special
3302 salt string and it is compatible with implementation on *BSD systems.
3304 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3305 `getsubopt' to handle second level command line options, `bsd_signal'
3306 to access BSD style `signal' functionality, the obsolete `regexp' style
3309 * the `lchown' function is available on system which support this
3312 * The implementation of the shadow password handling function was contributed
3315 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3317 * POSIX.1g support was added. The <sys/select.h> header is available,
3318 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3319 implementation of `getaddrinfo'.
3323 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3325 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3326 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3328 * The new function `daemon' from 4.4 BSD is useful for server programs that
3329 want to put themselves in the background.
3331 * Joel Sherrill has contributed support for several standalone boards that
3332 run without an operating system.
3334 * `printf', `scanf' and friends now accept a `q' type modifier for long
3335 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3337 * All of the code taken from BSD (notably most of the math and networking
3338 routines) has been updated from the BSD 4.4-Lite release.
3340 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3342 * The new functions `getdomainname' and `setdomainname' fetch or change the
3343 YP/NIS domain name. These are system calls which exist on systems which
3346 * The time zone data files have been updated for the latest international
3349 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3350 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3354 * The C library now includes support for Sun RPC, from Sun's free
3355 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3356 are included. (There is still no support for YP.)
3358 * Tom Quinn has contributed a port of the C library to SGI machines running
3359 Irix 4 (mips-sgi-irix4).
3361 * The new `lockf' function is a simplified interface to the locking
3362 facilities of `fcntl', included for compatibility.
3364 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3366 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3368 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3371 * The error message printed by `assert' for a failed assertion now includes
3372 the name of the program (if using GNU ld) and the name of the calling
3373 function (with versions of GCC that support this).
3375 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3377 * The library now includes the <sys/mman.h> header file and memory
3378 management functions `mmap', `munmap', `mprotect', `msync', and
3379 `madvise', on systems that support those facilities.
3381 * The interface for `mcheck' has changed slightly: the function called to
3382 abort the program when an allocation inconsistency is detected now takes
3383 an argument that indicates the type of failure. The new function
3384 `mprobe' lets you request a consistency check for a particular block at
3385 any time (checks are normally done only when you call `free' or `realloc'
3388 * It is now possible to easily cross-compile the C library, building on one
3389 system a library to run on another machine and/or operating system. All
3390 you need to do is set the variable `HOST_CC' in `configparms' to the
3391 native compiler for programs to run on the machine you are building on (a
3392 few generator programs are used on Unix systems); set `CC' to the
3395 * The new function `fexecve' (only implemented on the GNU system) executes
3396 a program file given a file descriptor already open on the file.
3400 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3401 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3403 * You can set the variable `libprefix' in `configparms' to specify a prefix
3404 to be prepended to installed library files; this makes it easy to install
3405 the GNU C library to be linked as `-lgnuc' or whatever.
3407 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3408 copies a limited number of characters from a string, and returns the
3409 address of the last character written.
3411 * You no longer need to check for whether the installed `stddef.h' is
3412 compatible with the GNU C library. configure now checks for you.
3414 * You can now define a per-stream `fileno' function to convert the
3415 stream's cookie into an integral file descriptor.
3417 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3418 allocates zero bytes of storage, and returns a unique pointer which
3419 you can pass to `realloc' or `free'. The behavior is undefined if
3420 you dereference this pointer.
3422 * The C library now runs on Sony NEWS m68k machines running either
3423 NewsOS 3 or NewsOS 4.
3425 * The new `syscall' function is a system-dependent primitive function
3426 for invoking system calls. It has the canonical behavior on Unix
3427 systems, including unreliable return values for some calls (such as
3428 `pipe', `fork' and `getppid').
3430 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3431 to `EAGAIN', which is the preferred name. On systems whose kernels
3432 use two distinct codes, the C library now translates EWOULDBLOCK to
3433 EAGAIN in every system call function.
3437 * The GNU C Library Reference Manual is now distributed with the library.
3438 `make dvi' will produce a DVI file of the printed manual.
3439 `make info' will produce Info files that you can read on line using C-h i
3440 in Emacs or the `info' program.
3441 Please send comments on the manual to bug-glibc-manual@gnu.org.
3443 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3445 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3447 * Jason Merrill has contributed a port to the Sequent Symmetry running
3448 Dynix version 3 (i386-sequent-dynix).
3450 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3451 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3453 * New function `memory_warnings' lets you arrange to get warnings when
3454 malloc is running out of memory to allocate, like Emacs gives you.
3456 * The C library now contains the relocating allocator used in Emacs 19 for
3457 its editing buffers. This allocator (ralloc) minimizes allocation
3458 overhead and fragmentation by moving allocated regions around whenever it
3459 needs to. You always refer to a ralloc'd region with a "handle" (a
3460 pointer to a pointer--an object of type `void **').
3462 * There is a new `printf' format: `%m' gives you the string corresponding
3463 to the error code in `errno'.
3465 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3466 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3467 pass, the `a' modifier says to fill in a `char **' you pass with a
3470 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3471 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3472 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3474 * `mkstemp' is a traditional Unix function to atomically create and open a
3475 uniquely-named temporary file.
3479 * The standard location for the file that says what the local timezone is
3480 has changed again. It is now `/usr/local/etc/localtime' (or more
3481 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3483 * The distribution no longer contains any files with names longer than 14
3486 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3487 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3489 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3493 * The configuration process has changed quite a bit. The `configure'
3494 script is now used just like the configuration scripts for other GNU
3495 packages. The `sysdeps' directory hierarchy is much rearranged.
3496 The file `INSTALL' explains the new scheme in detail.
3498 * The header files no longer need to be processed into ANSI C and
3499 traditional C versions. There is just one set of files to install, and
3500 it will work with ANSI or old C compilers (including `gcc -traditional').
3502 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3503 MIPS DECStation running Ultrix 4.
3505 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3506 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3507 made itself into a shared library.
3509 * Yet further improved support for the i386, running 4.3 BSD-like systems
3510 (such as Mach 3 with the Unix single-server), or System V.
3512 * New function `strncasecmp' to do case-insensitive string comparison
3513 with limited length.
3515 * New function `strsep' is a reentrant alternative to `strtok'.
3517 * New functions `scandir' and `alphasort' for searching directories.
3519 * New function `setenv' is a better interface to `putenv'.
3521 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3522 function for traversing a directory tree.
3524 * The GNU obstack package is now also part of the C library.
3525 The new function `open_obstack_stream' creates a stdio stream that
3526 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3527 formatted output directly to an obstack.
3529 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3530 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3532 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3534 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3535 things to your strings.
3537 * There are some new test programs: test-fseek, testmb, and testrand.
3539 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3540 These ports are not finished, but are a good starting place for really
3541 supporting those systems.
3543 * `/etc/localtime' is now the standard location for the file that says what
3544 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3545 This follows the general principle that `/etc' is the place for all local
3546 configuration files.
3548 * The C library header files now use `extern "C"' when used by the C++
3549 compiler, so the C library should now work with C++ code.
3551 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3552 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3555 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3556 function which uses the `merge sort' algorithm, and is said to be
3557 significantly faster than the old GNU `qsort' function. Merge sort is
3558 now the standard `qsort' function. The new algorithm can require a lot
3559 of temporary storage; so, the old sorting function is called when the
3560 required storage is not available.
3562 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3563 provides the Unix `crypt' function, plus some other entry points.
3565 * The code and header files taken from 4.4 BSD have been updated with the
3566 latest files released from Berkeley.
3568 ----------------------------------------------------------------------
3569 Copyright information:
3571 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3573 Permission is granted to anyone to make or distribute verbatim copies
3574 of this document as received, in any medium, provided that the
3575 copyright notice and this permission notice are preserved,
3576 thus giving the recipient permission to redistribute in turn.
3578 Permission is granted to distribute modified versions
3579 of this document, or of portions of it,
3580 under the above conditions, provided also that they
3581 carry prominent notices stating who last changed them.
3584 version-control: never