1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
36 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
37 the femode_t type and the FE_DFL_MODE macro.
39 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
40 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
41 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH.
43 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
44 for the Linux quota interface which predates kernel version 2.4.22 has
47 * DNSSEC-related declarations and definitions have been removed from the
48 <arpa/nameser.h> header file, and libresolv will no longer attempt to
49 decode the data part of DNSSEC record types. Previous versions of glibc
50 only implemented minimal support for the previous version of DNSSEC, which
51 is incompatible with the currently deployed version.
53 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
54 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
55 <arpa/nameser.h> header file because the distinction between RR types and
56 meta-RR types is not officially standardized, subject to revision, and
57 thus not suitable for encoding in a macro.
59 Security related changes:
61 On ARM EABI (32-bit), generating a backtrace for execution contexts which
62 have been created with makecontext could fail to terminate due to a
63 missing .cantunwind annotation. This has been observed to lead to a hang
64 (denial of service) in some Go applications compiled with gccgo. Reported
65 by Andreas Schwab. (CVE-2016-6323)
67 The following bugs are resolved with this release:
69 [The release manager will add the list generated by
70 scripts/list-fixed-bugs.py just before the release.]
74 * The minimum Linux kernel version that this version of the GNU C Library
75 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
76 kernel version 2.6.32 or later suffices (on architectures that already
77 required kernel versions more recent than 3.2, those requirements remain
78 unchanged). Linux 3.2 or later kernel headers are required on all
81 * The pap_AN locale has been deleted. This has been deprecated for a long
82 time. It has been replaced by pap_AW & pap_CW, both of which have long
83 been included in previous releases.
85 * The readdir_r and readdir64_r functions have been deprecated. It is
86 recommended to use readdir and readdir64 instead.
88 * The type “union wait” has been removed. It was deprecated in the early
89 1990s and never part of POSIX. Application code should use the int type
90 instead of “union wait”.
92 * A new NSS action is added to facilitate large distributed system
93 administration. The action, MERGE, allows remote user stores like LDAP
94 to be merged into local user stores like /etc/groups in order to provide
95 easy to use, updated, and managed sets of merged credentials. The new
96 action can be used by configuring it in /etc/nsswitch.conf:
97 group: files [SUCCESS=merge] nis
98 Implemented by Stephen Gallagher (Red Hat).
100 * The deprecated __malloc_initialize_hook variable has been removed from the
103 * The long unused localedef --old-style option has been removed. It hasn't
104 done anything in over 16 years. Scripts using this option can safely
107 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
108 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
109 return the next representable value in the direction of positive infinity
110 and the nextdown functions return the next representable value in the
111 direction of negative infinity. These are currently enabled as GNU
114 Security related changes:
116 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
117 could result in a stack overflow when getnetbyname was called with an
118 overly long name. (CVE-2016-3075)
120 * Previously, getaddrinfo copied large amounts of address data to the stack,
121 even after the fix for CVE-2013-4458 has been applied, potentially
122 resulting in a stack overflow. getaddrinfo now uses a heap allocation
123 instead. Reported by Michael Petlan. (CVE-2016-3706)
125 * The glob function suffered from a stack-based buffer overflow when it was
126 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
127 Reported by Alexander Cherepanov. (CVE-2016-1234)
129 * The Sun RPC UDP client could exhaust all available stack space when
130 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
131 alloca plugin for GCC. (CVE-2016-4429)
133 * The IPv6 name server management code in libresolv could result in a memory
134 leak for each thread which is created, performs a failing naming lookup,
135 and exits. Over time, this could result in a denial of service due to
136 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
138 The following bugs are resolved with this release:
140 [1170] localedata: ne_NP: update Nepali locale definition file
141 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
143 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
144 [6796] math: fdim() does not set errno on overflow
145 [10354] libc: posix_spawn should use vfork() in more cases than presently
146 [11213] localedata: localedata: add copyright disclaimer to locale files
147 [12143] localedata: chr_US: new Cherokee locale
148 [12450] localedata: sgs_LT: new locale
149 [12676] localedata: ln_CD: new locale
150 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
152 [13304] math: fma, fmaf, fmal produce wrong results
153 [14259] build: --localedir arg to configure is ignored
154 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
155 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
156 [14934] localedata: es_CL: wrong first weekday chilean locale
157 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
159 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
161 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
162 [15368] nptl: raise() is not async-signal-safe
163 [15479] math: ceil, floor, round and trunc raise inexact exception
164 [15578] localedata: kk_KZ: various updates
165 [16003] localedata: pap_AN: punt old locale
166 [16137] localedata: iw_IL: punt old locale
167 [16190] localedata: eo: new esperanto locale
168 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
169 [16742] malloc: race condition: pthread_atfork() called before first
170 malloc() results in unexpected locking behaviour/deadlocks
171 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
173 [16983] localedata: postal_fmt does not allow %l and %n modifiers
174 [17565] localedata: pt_PT: wrong (work-)week start
175 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
176 [17950] build: Build fails with -msse
177 [18205] localedata: be_BY*: wrong first_weekday and first_workday
178 [18433] libc: posix_spawn does not return correctly upon failure to
180 [18453] localedata: charmaps/IBM875: incorrect codes
181 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
183 [18896] localedata: he_IL: improvements for currency
184 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
186 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
188 [19056] libc: Deprecate readdir_r
189 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
191 [19198] localedata: nl_NL: small improvements for Dutch locales
192 [19257] network: Per-thread memory leak in __res_vinit with IPv6
193 nameservers (CVE-2016-5417)
194 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
196 [19400] locale: Language missing in "iso-639.def", trivial fix in
198 [19431] malloc: Deadlock between fflush, getdelim, and fork
199 [19505] libc: Incorrect file descriptor validity checks in
200 posix_spawn_file_actions_add{open,close,dup2}
201 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
203 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
204 `intl/{gettextP,loadinfo}.h'
205 [19534] libc: execle, execlp may use malloc
206 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
207 [19573] network: res_nclose and __res_maybe_init disagree about name
208 server initialization, breaking Hesiod
209 [19575] localedata: Status of GB18030 tables
210 [19581] localedata: sr_* date_fmt string contains additional newline
211 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
213 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
214 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
215 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
216 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
218 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
220 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
222 [19610] dynamic-link: ldconfig -X removes stale symbolic links
223 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
224 [19633] locale: strfmon_l applies global locale to number formatting
225 [19642] network: Memory leak in getnameinfo
226 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
227 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
229 [19654] math: [x86_64] Need testcase for BZ #19590 fix
230 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
232 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
233 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
235 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
237 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
239 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
240 pointers and lengths in error-case.
241 [19727] locale: Converting from/to UTF-xx with iconv() does not always
242 report errors on UTF-16 surrogates values.
243 [19755] nscd: nscd assertion failure in gc
244 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
245 [19759] libc: mempcpy shouldn't be inlined
246 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
247 [19765] libc: s390 needs an optimized mempcpy
248 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
249 NAME_MAX limit assumption (CVE-2016-1234)
250 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
251 [19787] network: Missing and incorrect truncation checks in getnameinfo
252 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
254 [19791] network: Assertion failure in res_query.c with un-connectable name
256 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
257 [19822] math: libm.so install clobbers old version
258 [19825] network: resolv: send_vc can return uninitialized data in second
259 response to getaddrinfo
260 [19830] network: nss_dns: should check RDATA length against buffer length
261 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
262 confronted with A/AAAA records of invalid size
263 [19837] nss: nss_db: No retries for some long lines with a larger buffer
264 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
265 [19853] stdio: Printing IBM long double in decimal with high precision is
267 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
268 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
269 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
271 [19865] network: Assertion failure or memory leak in
272 _nss_dns_getcanonname_r
273 [19868] network: nss_dns: netent code does not skip over non-PTR records
274 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
276 [19881] string: Improve x86-64 memset
277 [19907] string: Incorrect memcpy tests
278 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
280 [19925] libc: termios.h XCASE namespace
281 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
282 [19929] libc: limits.h NL_NMAX namespace
283 [19931] stdio: Memory leak in vfprintf
284 [19957] libc: clone(CLONE_VM) access invalid parent memory
285 [19963] localedata: en_IL: New locale
286 [19989] stdio: stdio.h cuserid namespace
287 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
289 [19996] locale: langinfo.h nl_langinfo_l namespace
290 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
291 [20010] network: getaddrinfo: Stack overflow in hostent translation
293 [20012] stdio: libio: fmemopen append mode failure
294 [20014] stdio: stdio.h namespace for pre-threads POSIX
295 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
296 [20023] libc: fcntl.h timespec namespace
297 [20024] math: [x86_64] vectorized sincos trashes the stack
298 [20031] network: nss_hesiod: Heap overflow in get_txt_records
299 [20041] time: sys/time.h timespec namespace
300 [20043] libc: unistd.h missing cuserid for UNIX98 and before
301 [20044] libc: unistd.h missing pthread_atfork for UNIX98
302 [20051] libc: ttyslot in wrong header under wrong conditions
303 [20054] libc: gethostname not declared for XPG4
304 [20055] libc: termios.h missing tcgetsid for XPG4
305 [20072] dynamic-link: x86 init_cpu_features is called twice in static
307 [20073] libc: sys/stat.h fchmod namespace
308 [20074] libc: stdlib.h rand_r namespace
309 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
310 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
312 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
313 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
315 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
316 [20119] libc: Wrong mask for processors level type from CPUID
317 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
318 AS not supporting AVX512
319 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
321 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
322 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
324 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
325 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
326 [20178] libc: posix_spawn{p} should not call exit
327 [20191] stdio: libio: vtables hardening
328 [20195] string: FMA4 detection requires CPUID execution with register
330 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
331 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
333 [20212] math: acos (sNaN) returns sNaN
334 [20213] math: asin (sNaN) returns sNaN
335 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
336 [20218] math: [i386] asinhl (sNaN) returns sNaN
337 [20219] math: [i386] atanhl (sNaN) returns sNaN
338 [20222] stdio: fopencookie: Mangle function pointers
339 [20224] math: [i386] cbrtl (sNaN) returns sNaN
340 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
341 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
343 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
344 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
345 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
346 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
347 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
348 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
349 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
350 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
351 [20240] math: modf (sNaN) returns sNaN
352 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
353 [20250] math: frexp (sNaN) returns sNaN
354 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
355 [20255] math: [i386] fdim, fdimf return with excess range and precision /
357 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
358 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
359 subscript is below array bounds [-Werror=array-bounds]
360 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
361 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
363 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
364 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
366 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
368 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
369 [20316] localedata: id_ID: Februari instead of Pebruari
370 [20327] string: POWER8 strcasecmp returns incorrect result
371 [20347] math: Failure: Test: j0_downward (0xap+0)
372 [20348] libc: FAIL: misc/tst-preadvwritev64
373 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
374 [20350] libc: There is no test for p{read,write}64
375 [20357] math: Incorrect cos result for 1.5174239687223976
376 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
380 * Unicode 8.0.0 Support: Character encoding, character type info, and
381 transliteration tables are all updated to Unicode 8.0.0, using new
382 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
383 These updates cause user visible changes, such as the fixes for bugs
384 89, 16061, and 18568.
386 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
387 kernel-internal CPU set size. This means that requests that change the
388 CPU affinity which failed before (for example, an all-ones CPU mask) will
389 now succeed. Applications that need to determine the effective CPU
390 affinities need to call sched_getaffinity or pthread_getaffinity_np after
391 setting it because the kernel can adjust it (and the previous size check
392 would not detect this in the majority of cases).
394 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
395 the following new symbols are used: fts64_children, fts64_close,
396 fts64_open, fts64_read and fts64_set.
398 * getaddrinfo now detects certain invalid responses on an internal netlink
399 socket. If such responses are received, an affected process will
400 terminate with an error message of "Unexpected error <number> on netlink
401 descriptor <number>" or "Unexpected netlink response of size <number> on
402 descriptor <number>". The most likely cause for these errors is a
403 multi-threaded application which erroneously closes and reuses the netlink
404 file descriptor while it is used by getaddrinfo.
406 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
407 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
408 unnecessary serialization of memory allocation requests across threads.
409 The defect is now corrected. Users should see a substantial increase in
410 the concurent throughput of allocation requests for applications which
411 trigger this bug. Affected applications typically create and
412 destroy threads frequently. (Bug 19048 was reported and analyzed by
415 * There is now a --disable-timezone-tools configure option for disabling the
416 building and installing of the timezone related utilities (zic, zdump, and
417 tzselect). This is useful for people who build the timezone data and code
418 independent of the GNU C Library.
420 * The obsolete header <regexp.h> has been removed. Programs that require
421 this header must be updated to use <regex.h> instead.
423 * The obsolete functions bdflush, create_module, get_kernel_syms,
424 query_module and uselib are no longer available to newly linked binaries;
425 the header <sys/kdaemon.h> has been removed. These functions and header
426 were specific to systems using the Linux kernel and could not usefully be
427 used with the GNU C Library on systems with version 2.6 or later of the
430 * Optimized string, wcsmbs and memory functions for IBM z13.
431 Implemented by Stefan Liebler.
433 * Newly linked programs that define a variable called signgam will no longer
434 have it set by the lgamma, lgammaf and lgammal functions. Programs that
435 require signgam to be set by those functions must ensure that they use the
436 variable provided by the GNU C Library and declared in <math.h>, without
437 defining their own copy.
439 * The minimum GCC version that can be used to build this version of the GNU
440 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
441 still be used to compile programs using the GNU C Library.
443 Security related changes:
445 * An out-of-bounds value in a broken-out struct tm argument to strftime no
446 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
448 * The LD_POINTER_GUARD environment variable can no longer be used to disable
449 the pointer guard feature. It is always enabled. Previously,
450 LD_POINTER_GUARD could be used to disable security hardening in binaries
451 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
454 * An integer overflow in hcreate and hcreate_r could lead to an
455 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
457 * The catopen function no longer has unbounded stack usage. Reported by
460 * The nan, nanf and nanl functions no longer have unbounded stack usage
461 depending on the length of the string passed as an argument to the
462 functions. Reported by Joseph Myers. (CVE-2014-9761)
464 * A stack-based buffer overflow was found in libresolv when invoked from
465 libnss_dns, allowing specially crafted DNS responses to seize control
466 of execution flow in the DNS client. The buffer overflow occurs in
467 the functions send_dg (send datagram) and send_vc (send TCP) for the
468 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
469 family. The use of AF_UNSPEC triggers the low-level resolver code to
470 send out two parallel queries for A and AAAA. A mismanagement of the
471 buffers used for those queries could result in the response of a query
472 writing beyond the alloca allocated buffer created by
473 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
474 the overflow. Thanks to the Google Security Team and Red Hat for
475 reporting the security impact of this issue, and Robert Holiday of
476 Ciena for reporting the related bug 18665. (CVE-2015-7547)
478 The following bugs are resolved with this release:
480 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
481 [887] math: Math library function "logb" and "nextafter" inconsistent
482 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
483 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
484 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
485 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
487 [4404] localedata: German translation of "Alarm clock" is misleading
488 [6799] math: nextafter() and nexttoward() doen't set errno on
489 overflow/underflow errors
490 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
492 [10432] nis: _nss_nis_setnetgrent assertion failure
493 [11460] libc: fts has no LFS support
494 [12926] network: getaddrinfo()/make_request() may spin forever
495 [13065] nptl: Race condition in pthread barriers
496 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
497 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
499 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
500 [14912] libc: Rename non-installed bits/*.h headers
501 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
502 [15367] math: Let gcc use __builtin_isinf
503 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
504 [15421] math: lgamma wrongly sets signgam for ISO C
505 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
506 FE_INVALID with argument out of range
507 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
509 [15786] dynamic-link: ifunc resolver functions can smash function
511 [15918] math: Unnecessary check for equality in hypotf()
512 [16061] localedata: Review / update transliteration data
513 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
515 [16141] time: strptime %z offset restriction
516 [16171] math: drem should be alias of remainder
517 [16296] math: fegetround is pure?
518 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
519 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
521 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
522 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
524 [16422] math: [powerpc] math-float, math-double failing llrint tests with
525 "Exception "Inexact" set" on ppc32
526 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
527 [16517] math: Missing underflow exception from tanf/tan/tanl
528 [16519] math: Missing underflow exception from sinhf
529 [16520] math: Missing underflow exception from tanhf
530 [16521] math: Missing underflow exception from exp2
531 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
533 [16734] stdio: fopen calls mmap to allocate its buffer
534 [16961] math: nan function incorrect handling of bad sequences
535 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
536 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
537 [16985] locale: localedef: confusing error message when opening output
539 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
540 [17197] locale: Redundant shift character in iconv conversion output at
542 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
543 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
544 [17250] dynamic-link: static linking breaks nss loading
545 (getaddrinfo/getpwnam/etc...)
546 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
548 [17441] math: isnan() should use __builtin_isnan() in GCC
549 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
550 (related to lock elision)
551 [17787] manual: Exponent on page 324 of the PDF ends prematurely
552 [17886] time: strptime should be able to parse "Z" as a timezone with %z
553 [17887] time: strptime should be able to parse "+01:00" style timezones
554 [17905] libc: catopen() Multiple unbounded stack allocations
556 [18084] libc: backtrace (..., 0) dumps core on x86
557 [18086] libc: nice() sets errno to 0 on success
558 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
559 is too large (CVE-2015-8778)
560 [18251] dynamic-link: SONAME missing when audit modules provides path
561 [18265] libc: add attributes for wchar string and memory functions
562 [18370] math: csqrt missing underflows
563 [18421] libc: [hppa] read-only segment has dynamic relocations
564 [18472] libc: Obsolete syscall wrappers should be compat symbols
565 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
566 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
567 [18525] localedata: Remove locale timezone information
568 [18560] libc: [powerpc] spurious bits/ipc.h definitions
569 [18568] localedata: Update locale data to Unicode 8.0
570 [18589] locale: sort-test.sh fails at random
571 [18595] math: ctan, ctanh missing underflows
572 [18604] libc: assert macro-expands its argument
573 [18610] math: S390: fetestexcept() reports any exception if DXC-code
574 contains a vector instruction exception.
575 [18611] math: j1, jn missing errno setting on underflow
576 [18618] localedata: sync Chechen locale definitions with other *_RU
578 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
579 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
580 [18665] network: In send_dg, the recvfrom function is NOT always using the
581 buffer size of a newly created buffer (CVE-2015-7547)
582 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
584 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
586 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
587 [18699] math: tilegx cproj() for various complex infinities does not yield
589 [18724] libc: Harden put*ent functions against data injection
590 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
591 [18755] build: build errors with -DNDEBUG
592 [18757] stdio: fmemopen fails to set errno on failure
593 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
595 [18781] libc: openat64 lacks O_LARGEFILE
596 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
597 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
598 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
599 [18790] math: [ldbl-128ibm] tanhl inaccurate
600 [18795] libc: stpncpy fortification misses buffer lengths that are
602 [18796] build: build fails for --disable-mathvec
603 [18803] math: hypot missing underflows
604 [18820] stdio: fmemopen may leak memory on failure
605 [18823] math: csqrt spurious underflows
606 [18824] math: fma spurious underflows
607 [18825] math: pow missing underflows
608 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
609 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
610 [18870] build: sem_open.c fails to compile with missing symbol
612 [18872] stdio: Fix memory leak in printf_positional
613 [18873] libc: posix_fallocate overflow check ineffective
614 [18875] math: Excess precision leads incorrect libm
615 [18877] libc: arm: mmap offset regression
616 [18887] libc: memory corruption when using getmntent on blank lines
617 [18918] localedata: hu_HU: change time to HH:MM:SS format
618 [18921] libc: Regression: extraneous stat() and fstat() performed by
620 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
621 binaries (CVE-2015-8777)
622 [18951] math: tgamma missing underflows
623 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
625 [18953] localedata: lt_LT: change currency symbol to the euro
626 [18956] math: powf inaccuracy
627 [18961] math: [i386] exp missing underflows
628 [18966] math: [i386] exp10 missing underflows
629 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
630 [18969] build: multiple string test failures due to missing locale
632 [18970] libc: Reference of pthread_setcancelstate in libc.a
633 [18977] math: float / long double Bessel functions not in XSI POSIX
634 [18980] math: i386 libm functions return with excess range and precision
635 [18981] math: i386 scalb*, ldexp return with excess range and precision
636 [18982] stdio: va_list and vprintf
637 [18985] time: Passing out of range data to strftime() causes a segfault
639 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
640 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
641 [19012] locale: iconv_open leaks memory on error path
642 [19016] math: clog, clog10 inaccuracy
643 [19018] nptl: Mangle function pointers in tls_dtor_list
644 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
645 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
646 [19048] malloc: malloc: arena free list can become cyclic, increasing
648 [19049] math: [powerpc] erfc incorrect zero sign
649 [19050] math: [powerpc] log* incorrect zero sign
650 [19058] math: [x86_64] Link fail with -fopenmp and -flto
651 [19059] math: nexttoward overflow incorrect in non-default rounding modes
652 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
653 [19074] network: Data race in _res_hconf_reorder_addrs
654 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
655 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
656 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
658 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
660 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
661 [19086] manual: posix_fallocate64 documented argument order is wrong.
662 [19088] math: lround, llround missing exceptions close to overflow
664 [19094] math: lrint, llrint missing exceptions close to overflow threshold
665 [19095] math: dbl-64 lrint incorrect for 64-bit long
666 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
667 [19124] dynamic-link: ld.so failed to build with older assmebler
668 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
669 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
670 [19134] math: [powerpc32] lround, lroundf spurious exceptions
671 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
672 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
673 pthread_setaffinity_np
674 [19156] math: [ldbl-128] j0l spurious underflows
675 [19164] nptl: tst-getcpu fails with many possible CPUs
676 [19168] math: math/test-ildoubl and math/test-ldouble failure
677 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
678 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
680 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
681 (FE_NOMASK_ENV) do not clear SSE exceptions
682 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
683 _int_new_arena/reused_arena
684 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
685 [19201] math: dbl-64 remainder incorrect sign of zero result
686 [19205] math: bits/math-finite.h conditions do not match math.h and
688 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
689 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
690 for C99-based standards
691 [19212] libc: features.h not -Wundef clean
692 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
694 [19214] libc: Family and model identification for AMD CPU's are incorrect.
695 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
696 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
698 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
700 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
702 [19242] libc: strtol incorrect in Turkish locales
703 [19243] malloc: reused_arena can pick an arena on the free list, leading
704 to an assertion failure and reference count corruption
705 [19253] time: tzset() ineffective when temporary TZ did not include DST
707 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
708 [19270] math: [hppa] Shared libm missing __isnanl
709 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
710 MAP_HUGETLB and MAP_STACK defines
711 [19313] nptl: Wrong __cpu_mask for x32
712 [19347] libc: grantpt: try to force a specific gid even without pt_chown
713 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
714 [19350] math: [ldbl-128ibm] sinhl spurious overflows
715 [19351] math: [ldbl-128ibm] logl inaccurate near 1
716 [19363] time: x32: times() return value wrongly truncates/sign extends
718 [19367] dynamic-link: Improve branch prediction on Silvermont
719 [19369] network: Default domain name not reset by res_ninit when "search"
720 / "domain" entry is removed from resolv.conf
721 [19375] math: powerpc: incorrect results for POWER7 logb with negative
723 [19385] localedata: bg_BG: time separator should be colon, not comma
724 [19408] libc: linux personality syscall wrapper may erroneously return an
725 error on 32-bit architectures
726 [19415] libc: dladdr returns wrong names on hppa
727 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
728 IBM905, IBM907, and IBM909
729 [19439] math: Unix98 isinf and isnan functions conflict with C++11
730 [19443] build: build failures with -DDEBUG
731 [19451] build: Make check fails on test-double-vlen2
732 [19462] libc: Glibc failed to build with -Os
733 [19465] math: Wrong code with -Os
734 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
736 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
738 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
739 [19486] math: S390: Math tests fail with "Exception Inexact set".
740 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
741 [19550] libc: [mips] mmap negative offset handling inconsistent with other
743 [19590] math: Fail to build shared objects that use libmvec.so functions.
747 * The following bugs are resolved with this release:
749 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
750 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
751 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
752 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
753 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
754 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
755 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
756 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
757 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
758 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
759 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
760 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
761 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
762 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
763 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
764 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
765 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
766 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
767 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
768 18657, 18676, 18694, 18696, 18887.
770 * Cache information can be queried via sysconf() function on s390 e.g. with
771 _SC_LEVEL1_ICACHE_SIZE as argument.
773 * A buffer overflow in gethostbyname_r and related functions performing DNS
774 requests has been fixed. If the NSS functions were called with a
775 misaligned buffer, the buffer length change due to pointer alignment was
776 not taken into account. This could result in application crashes or,
777 potentially arbitrary code execution, using crafted, but syntactically
778 valid DNS responses. (CVE-2015-1781)
780 * The time zone file parser has been made more robust against crafted time
781 zone files, avoiding heap buffer overflows related to the processing of
782 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
783 large time zone data files. Overly long time zone specifiers in the TZ
784 variable no longer result in stack overflows and crashes.
786 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
787 for LD and GD on x86 and x86-64, has been implemented. You will need
788 binutils-2.24 or later to enable this optimization.
790 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
791 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
792 Hat). These updates cause user visible changes, such as the fix for bug
795 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
796 and getXXbyYY NSS calls for the same database, causing a denial-of-service
797 condition in some applications.
799 * Added vector math library named libmvec with the following vectorized x86_64
800 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
802 The library can be disabled with --disable-mathvec. Use of the functions is
803 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
804 Shared library libmvec.so is linked in as needed when using -lm (no need to
805 specify -lmvec explicitly for not static builds).
806 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
808 * A new fmemopen implementation has been added with the goal of POSIX
809 compliance. The new implementation fixes the following long-standing
810 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
811 old implementation is still present for use be by existing binaries.
813 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
814 releases. It has been fixed to match 2.19 and older, but binaries built
815 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
817 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
818 Contributed by Roland McGrath (Google).
820 * The header <regexp.h> is deprecated, and will be removed in a future
821 release. Use of this header will trigger a deprecation warning.
822 Application developers should update their code to use <regex.h> instead.
824 This header was formerly part of SUS, but was deprecated in 1994 and
825 removed from the standard in 2001. Also, the glibc implementation
826 leaks memory. See BZ#18681 for more details.
830 * The following bugs are resolved with this release:
832 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
833 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
834 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
835 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
836 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
837 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
838 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
839 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
840 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
841 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
844 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
845 too little memory for the to-be-scanned arguments and overflow the
846 allocated buffer. The implementation now correctly computes the required
847 buffer size when using malloc, and switches to malloc from alloca as
850 * A new semaphore algorithm has been implemented in generic C code for all
851 machines. Previous custom assembly implementations of semaphore were
852 difficult to reason about or ensure that they were safe. The new version
853 of semaphore supports machines with 64-bit or 32-bit atomic operations.
854 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
855 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
857 * Port to Altera Nios II has been contributed by Mentor Graphics.
859 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
860 implementations for powerpc64/powerpc64le.
861 Implemented by Adhemerval Zanella (IBM).
863 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
864 and powerpc64le. This may improve lock scaling of existing programs on
865 HTM capable systems. The lock elision code is only enabled with
866 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
867 powerpc will issue a transaction abort on every syscall to avoid side
868 effects being visible outside transactions.
870 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
871 AArch64. Contributed by ARM Ltd.
873 * i386 memcpy functions optimized with SSE2 unaligned load/store.
875 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
876 under certain input conditions resulting in the execution of a shell for
877 command substitution when the application did not request it. The
878 implementation now checks WRDE_NOCMD immediately before executing the
879 shell and returns the error WRDE_CMDSUB as expected.
881 * CVE-2012-3406 printf-style functions could run into a stack overflow when
882 processing format strings with a large number of format specifiers.
884 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
885 infinite loop if the DNS response contained a PTR record of an unexpected
888 * The minimum GCC version that can be used to build this version of the GNU
889 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
890 still be used to compile programs using the GNU C Library.
892 * The GNU C Library is now built with -Werror by default. This can be
893 disabled by configuring with --disable-werror.
895 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
897 * The obsolete sigvec function has been removed. This was the original
898 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
899 programs have been using instead for about 25 years. Of course, ABI
900 compatibility for old binaries using sigvec remains intact.
902 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
903 with newer versions of bison.
905 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
906 The original MIPS o32 hard-float ABI requires an FPU where double-precision
907 registers overlay two consecutive single-precision registers. MIPS32R2
908 introduced a new FPU mode (FR=1) where double-precision registers extend the
909 corresponding single-precision registers which is incompatible with the
910 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
911 require the use of FR=1 making a transition necessary. New o32 ABI
912 extensions enable users to migrate over time from the original o32 ABI
913 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
914 tracks the ABI of any loaded object and verifies that new objects are
915 compatible. Mode transitions will also be requested as required and
916 unsupportable objects will be rejected. The ABI checks include both soft and
917 hard float ABIs for o32, n32 and n64.
919 GCC 5 with GNU binutils 2.25 onwards:
920 It is strongly recommended that all o32 system libraries are built using the
921 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
922 with the original and all new o32 ABI extensions. Configure a MIPS GCC
923 compiler using --with-fp-32=xx to set this by default.
927 * The following bugs are resolved with this release:
929 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
930 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
931 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
932 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
933 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
934 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
935 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
936 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
937 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
938 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
939 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
940 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
941 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
942 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
943 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
945 * Reverted change of ABI data structures for s390 and s390x:
946 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
947 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
948 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
949 are preserved pointing straight to the same implementation as the old ones.
950 Given that, new callers will simply provide a too-big buffer to these
951 functions. Any applications/libraries out there that embed jmp_buf or
952 ucontext_t in an ABI-relevant data structure that have already been rebuilt
953 against 2.19 headers will have to rebuilt again. This is necessary in any
954 case to revert the breakage in their ABI caused by the glibc change.
956 * Support for file description locks is added to systems running the
957 Linux kernel. The standard file locking interfaces are extended to
958 operate on file descriptions, not file descriptors, via the use of
959 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
960 are associated with an open file instead of a process.
962 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
964 * The minimum Linux kernel version that this version of the GNU C Library
965 can be used with is 2.6.32.
967 * Running the testsuite no longer terminates as soon as a test fails.
968 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
969 with PASS or FAIL lines for individual tests. A summary of the results is
970 printed, including a list of failing lists, and "make check" exits with
971 error status if there were any unexpected failures. "make check
972 stop-on-test-failure=y" may be used to keep the old behavior.
974 * The am33 port, which had not worked for several years, has been removed
977 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
978 supported; they now act the same as _DEFAULT_SOURCE (but generate a
979 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
980 conflicted with POSIX (support for which was removed in 2.19), the
981 interfaces those macros enabled remain available when compiling with
982 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
985 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
987 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
988 This may improve lock scaling of existing programs on TX capable systems.
989 The lock elision code is only built with --enable-lock-elision=yes and
990 then requires a GCC version supporting the TX builtins. With lock elision
991 default mutexes are elided via __builtin_tbegin, if the cpu supports
992 transactions. By default lock elision is not enabled and the elision code
995 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
996 copy the path argument. This allowed programs to cause posix_spawn to
997 deference a dangling pointer, or use an unexpected pathname argument if
998 the string was modified after the posix_spawn_file_actions_addopen
1001 * All supported architectures now use the main glibc sysdeps directory
1002 instead of some being in a separate "ports" directory (which was
1003 distributed separately before glibc 2.17).
1005 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1006 On configurations that support it (all Linux configurations), it's now
1007 used regardless of the --enable-add-ons switch to configure. It is no
1008 longer possible to build such configurations without pthreads support.
1010 * Locale names, including those obtained from environment variables (LANG
1011 and the LC_* variables), are more tightly checked for proper syntax.
1012 setlocale will now fail (with EINVAL) for locale names that are overly
1013 long, contain slashes without starting with a slash, or contain ".." path
1014 components. (CVE-2014-0475) Previously, some valid locale names were
1015 silently replaced with the "C" locale when running in AT_SECURE mode
1016 (e.g., in a SUID program). This is no longer necessary because of the
1019 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1020 with application code using Intel MPX instructions. (With all previous
1021 versions, the MPX register state could be clobbered when making calls
1022 into or out of a shared library.) Note that while the new dynamic
1023 linker is compatible with all known x86 hardware whether or not it
1024 supports Intel MPX, some x86 instruction-set emulators might fail to
1025 handle the new instruction encodings. This is known to affect Valgrind
1026 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1027 release), and might affect other tools that do instruction emulation.
1029 * Support for loadable gconv transliteration modules has been removed.
1030 The support for transliteration modules has been non-functional for
1031 over a decade, and the removal is prompted by security defects. The
1032 normal gconv conversion modules are still supported. Transliteration
1033 with //TRANSLIT is still possible, and the //IGNORE specifier
1034 continues to be supported. (CVE-2014-5119)
1036 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1037 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1038 resulting a denial-of-service security vulnerability in applications which
1039 use functions related to iconv. (CVE-2014-6040)
1043 * The following bugs are resolved with this release:
1045 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1046 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1047 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1048 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1049 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1050 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1051 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1052 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1053 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1054 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1055 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1056 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1057 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1058 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1059 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1060 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1061 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1062 16431, 16453, 16474, 16506, 16510, 16529
1064 * Slovenian translations for glibc messages have been contributed by the
1065 Translation Project's Slovenian team of translators.
1067 * The public headers no longer use __unused nor __block. This change is to
1068 support compiling programs that are derived from BSD sources and use
1069 __unused internally, and to support compiling with Clang's -fblock
1070 extension which uses __block.
1072 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1073 large collation sequences to optimize multiple passes. This cache
1074 computation may overflow for large collation sequences and may cause a
1075 stack or buffer overflow. This is now fixed to use a slower algorithm
1076 which does not use a cache if there is an integer overflow.
1078 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1079 rules for large collation sequences to optimize multiple passes and falls
1080 back to alloca if malloc fails, resulting in a possible stack overflow.
1081 The implementation now falls back to an uncached collation sequence lookup
1084 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1085 initialized for static applications resulting in the security feature
1086 being disabled. The pointer guard is now correctly initialized to a
1087 random value for static applications. Existing static applications need
1088 to be recompiled to take advantage of the fix (bug 15754).
1090 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1091 to the d_name member of struct dirent, or omit the terminating NUL
1092 character. (Bugzilla #14699).
1094 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1095 aligned_alloc functions could allocate too few bytes or corrupt the
1096 heap when passed very large allocation size values (Bugzilla #15855,
1099 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1100 for AF_INET6 has been fixed (Bugzilla #16072).
1102 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1103 pap_CW, quz_PE, the_NP.
1105 * Substantially revised locales: gd_GB, ht_HT
1107 * The LC_ADDRESS field was updated to support country_car for almost all
1110 * ISO 1427 definitions were updated.
1112 * ISO 3166 definitions were updated.
1114 * The localedef utility now supports --big-endian and --little-endian
1115 command-line options to generate locales for a different system from that
1116 for which the C library was built.
1118 * Binary locale files now only depend on the endianness of the system for
1119 which they are generated and not on other properties of that system. As a
1120 consequence, binary files generated with new localedef may be incompatible
1121 with old versions of the GNU C Library, and binary files generated with
1122 old localedef may be incompatible with this version of the GNU C Library,
1123 in the following circumstances:
1125 + Locale files may be incompatible on m68k systems.
1127 + Locale archive files (but not separate files for individual locales) may
1128 be incompatible on systems where plain "char" is signed.
1130 * The configure option --disable-versioning has been removed. Builds with
1131 --disable-versioning had not worked for several years.
1133 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1134 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1136 * SystemTap probes for malloc have been introduced.
1138 * SystemTap probes for slow multiple precision fallback paths of
1139 transcendental functions have been introduced.
1141 * Support for powerpc64le has been added.
1143 * The soft-float powerpc port now supports e500 processors.
1145 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1147 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1148 set of header declarations that are enabled by default, even when other
1149 feature test macros or compiler options such as -std=c99 would otherwise
1150 disable some of those declarations.
1152 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1153 conflict with POSIX. The libbsd-compat library (which was a dummy library
1154 that did nothing) has also been removed.
1156 * Preliminary documentation about Multi-Thread, Async-Signal and
1157 Async-Cancel Safety has been added.
1159 * Change of ABI data structures for s390 and s390x:
1160 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1161 allow for future hardware extensions. All library functions that accept or
1162 return these structures were versioned in order to provide backwards
1163 compatibility with existing code. However, not all cases can be handled
1164 with interface versioning. If an application embeds either structure into
1165 another structure and that structure is passed to another compilation unit
1166 which expects the newer larger-sized object then any access to the new
1167 fields will result in undefined behaviour. Similarly any access to fields
1168 that were moved by the enlarging of the structures will cause undefined
1169 behaviour. To fix the undefined behaviour all objects that are part of the
1170 final in-memory image must agree on the size of structures, and this may
1171 require recompilation.
1175 * The following bugs are resolved with this release:
1177 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1178 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1179 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1180 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1181 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1182 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1183 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1184 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1185 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1186 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1187 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1188 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1189 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1192 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1193 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1194 Distributions can re-enable building and using pt_chown via the new configure
1195 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1196 considerable security risks and should only be used if the distribution
1197 understands and accepts the risks.
1199 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1202 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1203 fixed (Bugzilla #15330).
1205 * Add support for calling C++11 thread_local object destructors on thread
1206 and program exit. This needs compiler support for offloading C++11
1207 destructor calls to glibc.
1209 * Improved worst case performance of libm functions with double inputs and
1212 * Support for priority inherited mutexes in pthread condition variables on
1213 non-x86 architectures.
1215 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1217 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1219 * Optimized string functions for ARM. Implemented by Will Newton and
1222 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1224 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1227 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1228 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1230 * Added a benchmark framework to track performance of functions in glibc.
1232 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1233 It is based on draft TS 18661 and currently enabled as a GNU extension.
1235 * On Linux, the clock function now uses the clock_gettime system call
1236 for improved precision, rather than old times system call.
1238 * Added support for version-3 tz format files. This is needed when using
1239 the tz database release 2013e or later, and affects a few unusual cases --
1240 currently only TZ='America/Godthab' for time stamps after 2037.
1242 * Added new API functions pthread_getattr_default_np and
1243 pthread_setattr_default_np to get and set the default pthread
1244 attributes of a process.
1246 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1247 This may improve lock scaling of existing programs on TSX capable systems.
1248 When the --enable-lock-elision=yes parameter is specified at configure
1249 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1252 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1253 availability). Implemented by Ryan S. Arnold.
1255 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1259 * The following bugs are resolved with this release:
1261 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1262 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1263 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1264 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1265 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1266 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1267 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1268 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1269 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1270 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1271 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1272 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1273 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1274 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1275 14879, 14889, 14893, 14898, 14914.
1277 * Optimization of memcpy for MIPS.
1279 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1280 EMFILE has been fixed (Bugzilla #14889).
1282 * The add-on ports collection is now distributed in the "ports" subdirectory
1283 of the main GNU C Library distribution, rather than separately.
1285 * Port to ARM AArch64 contributed by Linaro.
1287 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1288 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1290 Implemented by Andreas Krebbel.
1292 * The new function secure_getenv allows secure access to the environment,
1293 returning NULL if running in a SUID/SGID process. This function replaces
1294 the internal function __secure_getenv.
1296 * SystemTap static probes have been added into the dynamic linker.
1297 Implemented by Gary Benson.
1299 * Optimizations of string functions strstr, strcasestr and memmem.
1300 Implemented by Maxim Kuvyrkov.
1302 * The minimum Linux kernel version that this version of the GNU C Library
1303 can be used with is 2.6.16.
1305 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1306 powerpc POWER7. Implemented by Will Schmidt.
1308 * New configure option --disable-nscd builds the C library such that it
1309 never attempts to contact the Name Service Caching Daemon (nscd).
1310 New configure option --disable-build-nscd avoids building nscd itself;
1311 this is the default if --disable-nscd is used.
1313 * Improved support for cross-compilation, including cross-testing and
1314 bootstrap builds without a previously built glibc.
1316 * Several testsuite tests are now able to test multiple IFUNC variants of an
1317 interface, rather than just testing the one that would be chooen by
1320 * New configure options --with-bugurl and --with-pkgversion, for
1321 distributors to use to embed their bug-reporting and package version
1322 information in --help and --version output.
1324 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1325 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1326 allows creation of chroots without the procfs mounted on /proc.
1328 * The `crypt' function now fails if passed salt bytes that violate the
1329 specification for those values. On Linux, the `crypt' function will
1330 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1331 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1332 when the mode is enabled.
1334 * The `clock_*' suite of functions (declared in <time.h>) is now available
1335 directly in the main C library. Previously it was necessary to link with
1336 -lrt to use these functions. This change has the effect that a
1337 single-threaded program that uses a function such as `clock_gettime' (and
1338 is not linked with -lrt) will no longer implicitly load the pthreads
1339 library at runtime and so will not suffer the overheads associated with
1340 multi-thread support in other code such as the C++ runtime library.
1342 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1347 * The following bugs are resolved with this release:
1349 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1350 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1351 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1352 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1353 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1354 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1355 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1356 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1357 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1358 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1359 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1360 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1361 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1362 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1363 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1364 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1365 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1366 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1367 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1368 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1369 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1370 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1373 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1374 configuring glibc with:
1375 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1376 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1377 Implemented by H.J. Lu.
1381 + define static_assert
1383 + do not declare gets
1385 + declare at_quick_exit and quick_exit also for ISO C11
1387 + aligned_alloc. NB: The code is deliberately allows the size parameter
1388 to not be a multiple of the alignment. This is a moronic requirement
1389 in the standard but it is only a requirement on the caller, not the
1392 + timespec_get added
1394 + uchar.h support added
1396 + CMPLX, CMPLXF, CMPLXL added
1398 Implemented by Ulrich Drepper.
1400 * Support for the IA-64 has been moved to ports.
1402 * Remove support for anything but ELF binary format
1404 * Checking versions of poll, ppoll added.
1405 Implemented by Ulrich Drepper.
1407 * More generic and 64-bit performance optimizations to math functions.
1408 Implemented by Ulrich Drepper.
1410 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1411 headers and functions available at compile time as they were before
1412 version 2.14. This option will be removed at some time in the future
1413 after the TI-RPC library becomes fully sufficient for the needs of
1414 existing applications.
1416 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1417 Note that glibc is not expected to work with any Linux kernel version
1420 * New header <sys/auxv.h> and function getauxval allowing easy access to
1421 the AT_* key-value pairs passed from the Linux kernel. The header also
1422 defines the HWCAP_* bits associated with the AT_HWCAP key.
1424 * New locales: mag_IN
1426 * New configure option --enable-systemtap builds SystemTap static probes
1427 into libc for setjmp and longjmp and into libpthread for various operations.
1428 So far the setjmp/longjmp probes and some of the libpthread probes are
1429 provided only for i*86 and x86_64.
1430 Implemented by Roland McGrath and Rayson Ho.
1432 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1434 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1437 * More optimized functions for SPARC. Implemented by David S. Miller.
1439 * Improved support for cross-compilation, especially bootstrap builds
1440 without a previously built glibc.
1442 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1443 Chris Metcalf from Tilera.
1445 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1446 now supported for ARM processors.
1448 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1449 as the name of the dynamic linker, to distinguish it from the
1450 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1452 * Support for CRIS has been removed from ports.
1454 * A new class of installed header has been documented for low-level
1455 platform-specific functionality. PowerPC added the first instance with a
1456 function to provide time base register access. Contributed by Tulio
1457 Magno Quites Machado Filho.
1459 * ix86 configurations now install header files that are consistent with
1460 what x86-64 configurations install. These same header files can be used
1461 for -m32, -m64, or -mx32 builds.
1462 Contributed by H.J. Lu.
1464 * Math library bug fixes. A thorough audit of all open math library bugs was
1465 conducted by Joseph Myers. Significant progress was made on many math
1466 library bugs resulting in more accurate exceptions and function results.
1467 Many thanks to all those that contributed including Andreas Jaeger for his
1468 patch review and work on the x87 trigonometric instruction issues.
1470 * Timezone data is no longer installed. Timezone-related binaries and scripts
1471 will continue to be installed. Users should obtain their timezone data from
1472 their distribution provider or from the tzdata package at
1473 <ftp://munnari.oz.au/pub/>.
1477 * The following bugs are resolved with this release:
1479 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1480 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1481 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1482 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1483 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1484 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1485 13484, 13506, 13515, 13523, 13524, 13538, 13540
1487 * New program pldd to list loaded object of a process
1488 Implemented by Ulrich Drepper.
1490 * Add nss_db support back to glibc. No more dependency on Berkeley db
1491 and support for initgroups lookups.
1492 Implemented by Ulrich Drepper.
1494 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1495 Contributed by HJ Lu.
1497 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1498 Contributed by HJ Lu.
1500 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1501 on x86-32 and x86-64.
1502 Contributed by Liubov Dmitrieva.
1504 * Optimized strchr and strrchr for SSE on x86-32.
1505 Contributed by Liubov Dmitrieva.
1507 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1508 for x86-64 and x86-32.
1509 Contributed by Liubov Dmitrieva.
1511 * New interfaces: scandirat, scandirat64
1512 Implemented by Ulrich Drepper.
1514 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1515 Implemented by Ulrich Drepper.
1517 * nscd now also caches the netgroup database.
1518 Implemented by Ulrich Drepper.
1520 * Integrate libm with gcc's -ffinite-math-only option.
1521 Implemented by Ulrich Drepper.
1523 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1524 to math functions. Implemented by Ulrich Drepper.
1526 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1527 Implemented by Ulrich Drepper.
1529 * New Linux interfaces: process_vm_readv, process_vm_writev
1531 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1532 Implemented by Ulrich Drepper.
1534 * Optimized nearbyint and strcasecmp for PPC.
1535 Implemented by Adhemerval Zanella.
1537 * New locales: bho_IN, unm_US, es_CU, ta_LK
1541 * The following bugs are resolved with this release:
1543 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1544 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1545 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1546 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1547 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1548 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1549 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1550 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1551 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1552 12795, 12811, 12813, 12814, 12841
1554 * The RPC implementation in libc is obsoleted. Old programs keep working
1555 but new programs cannot be linked with the routines in libc anymore.
1556 Programs in need of RPC functionality must be linked against TI-RPC.
1557 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1559 Visible changes of this change include (obviously) the inability to link
1560 programs using RPC functions without referencing the TI-RPC library and the
1561 removal of the RPC headers from the glibc headers.
1562 Implemented by Ulrich Drepper.
1564 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1565 syncfs, setns, sendmmsg
1567 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1568 yue_HK, lij_IT, mhr_RU
1570 * New encodings: CP770, CP771, CP772, CP773, CP774
1572 * New program sotruss to trace calls through PLTs
1573 Implemented by Ulrich Drepper.
1575 * The malloc hook implementation is marked deprecated and will be removed
1576 from the default implementation in the next version. The design never
1577 worked ever since the introduction of threads. Even programs which do
1578 not create threads themselves can use multiple threads created internally.
1582 * The following bugs are resolved with this release:
1584 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1585 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1586 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1587 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1590 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1592 * POWER7 optimizations: memset, memcmp, strncmp
1594 * New optimized string functions for x86-64: strnlen (SSE2),
1595 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1596 Implemented by Ulrich Drepper.
1600 * The following bugs are resolved with this release:
1602 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1603 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1604 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1605 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1606 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1607 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1608 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1609 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1611 * New interfaces: pthread_getname_np, pthread_setname_np
1613 * New Linux interface: recvmmsg
1615 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1617 * The dynamic linker now recognizes supported ABI versions from the
1618 EI_ABIVERSION field in the ELF header.
1619 Implemented by Ulrich Drepper.
1621 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1622 will not be used to fill in password fields in the passwd.byname replies.
1623 Instead it is used to synthesize the shadow.byname table, should it be
1624 missing. This is a useful mode in some installations involving Solaris.
1625 Implemented by Ulrich Drepper.
1627 * New locales: kok_IN, sq_MK, cv_RU
1631 * The following bugs are resolved with this release:
1633 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1634 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1635 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1636 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1637 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1638 10789, 10817, 10823, 10840, 10847
1640 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1642 Implemented by Ulrich Drepper.
1644 * Checking version of longjmp added that fails if an uninitialized stack
1645 frame would be created. Implemented by Ulrich Drepper.
1647 * STT_GNU_IFUNC is now supported in static executables.
1648 Implemented by H.J. Lu.
1650 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1652 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1653 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1654 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1655 Contributed by H.J. Lu.
1657 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1658 Implemented by Ulrich Drepper.
1660 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1662 Contributed by H.J. Lu.
1664 * Support for fma instruction in AVX on x86-64.
1665 Implemented by H.J. Lu and Ulrich Drepper.
1667 * AVX support in x86-64 auditing support in ld.so.
1668 Implemented by H.J. Lu.
1670 * STB_GNU_UNIQUE support added.
1671 Implemented by Ulrich Drepper.
1673 * Implement second fallback mode for optimized DNS lookup for even more
1674 broken environments. If two requests from the same port are not
1675 handled correctly close the socket and open a new one before sending
1676 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1677 can be used to select this mode right away, instead of rediscovering the
1678 necessity is every process again.
1679 Implemented by Ulrich Drepper.
1681 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1682 Implemented by Adam Tkac.
1684 * Optimized iconv conversions for S390x.
1685 Implemented by Andreas Krebbel.
1687 * Using condvars with PI mutexes is now more efficient due to kernel
1688 support for requeueing to PI futexes. NPTL support added for x86-64.
1689 Implemented by Ulrich Drepper.
1691 * New locales: ps_AF, my_MM
1695 * The following bugs are resolved with this release:
1697 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1698 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1699 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1700 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1701 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1703 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1704 Implemented by Ulrich Drepper.
1706 * New Linux interfaces: accept4, fallocate, fallocate64.
1707 Implemented by Ulrich Drepper.
1709 * Correct declarations of string function when used in C++ code. This
1710 could lead to compile errors for invalid C++ code.
1712 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1715 * New POSIX 2008 interface: psiginfo
1716 Implemented by Ulrich Drepper.
1718 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1719 Implemented by Ulrich Drepper.
1721 * Support for selecting between multiple function definitions at runtime
1722 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1724 * The libcrypt library can now use the hash function implementations in
1725 NSS. Implemented by Ulrich Drepper.
1727 * The malloc implementation can be compiled to be less memory efficient
1728 but higher performing in multi-threaded programs.
1729 Implemented by Ulrich Drepper.
1731 * New locales: nan_TW@latin, ks_IN
1733 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1734 Implemented by Ulrich Drepper.
1736 * Extended printf hook support. It is possible to use user-defined types
1737 and extend existing format specifiers.
1738 Implemented by Ulrich Drepper.
1740 * Handling for group shadow files has been added.
1741 Implemented by Ulrich Drepper.
1743 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1744 servers (the case, e.g., for some people using the built-in DNS
1745 server in ADSL modems/routers). There is a once-per-process timeout
1746 in case of a broken server. To avoid it, users can run nscd or put
1747 'options single-request' in /etc/resolv.conf.
1748 Implemented by Ulrich Drepper.
1752 * The following bugs are resolved with this release:
1754 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1755 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1756 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1757 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1758 6968, 6974, 6980, 6995, 7008, 7009, 7029
1760 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1761 up at the same time. Implemented by Ulrich Drepper.
1763 * TLS descriptors for LD and GD on x86 and x86-64.
1764 Implemented by Alexandre Oliva.
1766 * getaddrinfo now handles DCCP and UDPlite.
1767 Implemented by Ulrich Drepper.
1769 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1770 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1771 Implemented by Ulrich Drepper.
1773 * New implementation of memmem, strstr, and strcasestr which is O(n).
1774 Implemented by Eric Blake.
1776 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1778 * Implement "e" option for popen to open file descriptor with the
1779 close-on-exec flag set. Implemented by Ulrich Drepper.
1781 * Implement "b" mode for fmemopen. In this mode writes writes don't
1782 implicitly add a NUL byte and seeks from the end of the buffer really
1783 use the buffer end, not the string length as the basis.
1784 Implemented by Ulrich Drepper.
1786 * Many functions, exported and internal, now atomically set the close-on-exec
1787 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1789 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1791 Implemented by Pravin Satpute.
1793 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1797 * The following bugs are resolved with this release:
1799 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1800 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1801 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1802 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1803 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1804 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1805 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1807 * New locales: bo_CN, bo_IN, shs_CA.
1809 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1811 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1812 Implemented by Pravin Satpute.
1814 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1816 * nscd caches now all timeouts for DNS entries
1817 Implemented by Ulrich Drepper.
1819 * nscd is more efficient and wakes up less often.
1820 Implemented by Ulrich Drepper.
1822 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1823 vdprintf, and obstack_vprintf.
1824 Implemented by Jakub Jelinek.
1826 * Faster memset for x86-64.
1827 Implemented by Harsha Jagasia and H.J. Lu.
1829 * Faster memcpy on x86.
1830 Implemented by Ulrich Drepper.
1832 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1833 Implemented by Ulrich Drepper.
1835 * Faster sqrt and sqrtf implemention for some PPC variants.
1836 Implemented by Steven Munroe.
1840 * The following bugs are resolved with this release:
1842 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1843 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1844 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1845 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1846 5071, 5103, 5104, 5112, 5113, 5184, 5186
1848 * More checking functions: fread, fread_unlocked, open*, mq_open.
1849 Implemented by Jakub Jelinek and Ulrich Drepper.
1851 * Extend fortification to C++. Implemented by Jakub Jelinek.
1853 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1854 by not recognizing 'a' as a modifier when those specs are requested.
1855 Implemented by Jakub Jelinek.
1857 * PPC optimizations to math and string functions.
1858 Implemented by Steven Munroe.
1860 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1861 options to be passed. Implemented by Ulrich Drepper.
1863 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1865 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1866 Implemented by Ulrich Drepper.
1868 * Handle private futexes in the NPTL implementation.
1869 Implemented by Jakub Jelinek and Ulrich Drepper.
1871 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1872 Implemented by Roland McGrath and Ulrich Drepper.
1874 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1876 * SHA-256 and SHA-512 based password encryption.
1877 Implemented by Ulrich Drepper.
1879 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1880 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1883 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1884 Implemented by Ulrich Drepper.
1888 * The following bugs are resolved with this release:
1890 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1891 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1892 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1893 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1894 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1895 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1896 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1899 * New Linux interfaces: epoll_pwait, sched_getcpu.
1901 * New generic interfaces: strerror_l.
1903 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1907 * The following bugs are resolved with this release:
1909 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1910 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1911 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1912 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1913 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1914 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1915 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1916 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1917 3225, 3251, 3252, 3253, 3273
1919 * For Linux, the sorting of addresses returned by getaddrinfo now also
1920 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1921 Implemented by Ulrich Drepper.
1923 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1924 Implemented by Ulrich Drepper.
1926 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1928 * New iconv module for MIK. Contributed by Alexander Shopov.
1930 * For sites with broken group and/or passwd database, the auto-propagate
1931 option of nscd can prevent creating ID lookup entries from the results
1932 of a name lookup and vice versa. This usually is no problem but some
1933 site might have problems with the default behavior.
1934 Implemented by Ulrich Drepper.
1936 * Iterating over entire database in NIS can be slow. With the
1937 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1938 to trade time for memory. The entire database will be read at once.
1939 Implemented by Ulrich Drepper.
1941 * The interfaces introduced in RFC 3542 have been implemented by
1944 * Support for the new ELF hash table format was added by Ulrich Drepper.
1946 * Support for priority inheritance mutexes added by Jakub Jelinek and
1949 * Support for priority protected mutexes added by Jakub Jelinek.
1951 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1952 or_IN, csb_PL, fy_NL, sr_ME.
1956 * More overflow detection functions.
1958 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1959 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1961 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1962 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1963 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1964 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1965 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1966 by Masahide Washizawa.
1968 * It is now possible to install audit libraries for the dynamic linker using
1969 LD_AUDIT. Implemented by Ulrich Drepper.
1971 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1972 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1973 For a libc and libpthread that works well on Linux 2.4 kernels, we
1974 recommend using the stable 2.3 branch.
1976 * The new function open_wmemstream acts like open_memstream,
1977 but uses a wchar_t wide character buffer.
1979 * The new function ppoll is an improved version of poll, similar to pselect.
1981 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1982 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1983 renameat, unlinkat, linkat, symlinkat, readlinkat.
1985 * New Linux kernel system calls: unshare,
1986 inotify_init, inotify_add_watch, inotify_rm_watch.
1988 * The euidaccess function is now also known by the alias eaccess,
1989 for compatibility with some other systems.
1991 * Timezone data updated to 2006b version.
1995 * The following bugs are resolved with this release:
1997 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1998 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1999 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2000 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2001 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2002 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2004 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2006 * As of this release, GCC 4 can be used to compile the C Library.
2008 * Timezone data updated to 2005m version.
2012 * The following bugs are resolved with this release:
2014 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2015 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2016 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2017 777, 787, 821, 822, 823, 825
2019 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2023 * Support for RFC 3678. Real implementations exist only for Linux so far.
2024 Implemented by Ulrich Drepper.
2026 * nscd can now cache entries persistently. Expiring entries are reloaded.
2027 For speedups the cache can be shared in memory with client processes.
2028 Implemented by Ulrich Drepper.
2030 * nscd can now perform SELinux checks.
2031 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2033 * getaddrinfo queries are now cached. Canonical name lookup is performed
2035 Implemented by Ulrich Drepper.
2037 * The nothrow function attribute is used when headers are used by gcc when
2038 compiling C code. This can avoid significant amounts of exception
2041 * The malloc functions perform more error checking and are stricter when
2042 it comes to reacting on errors. The default action is to terminate
2043 the process after showing an error message. Implemented by Ulrich Drepper.
2045 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2046 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2048 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2049 namespaces using the new function dlmopen(). This feature is of course,
2050 like most other dynamic loading functionality, not available in statically
2051 linked applications. Implemented by Ulrich Drepper.
2053 * Low-overhead boundary checking variants of string and some stdio functions
2054 were added. These are to be used in conjunction with a gcc patch by
2055 Jakub Jelinek which adds calls to these functions if possible.
2056 Implemented by Jakub Jelinek and Ulrich Drepper.
2058 * Old code for several operating systems and machine architectures that
2059 have not been in working condition in a long time have been removed from
2060 the main source tree maintained by the GNU C Library's maintainers.
2061 These files are now reside in the separate `ports' source module
2062 that is usable as an add-on when building the library.
2066 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2067 interrogate the dynamic linker, compatible with the Solaris interface.
2069 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2070 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2072 * getifaddrs now uses the netlink interface on Linux to get its information.
2073 Implemented by Thorsten Kukuk.
2075 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2076 Implemented by Ulrich Drepper.
2078 * support for non-executable stacks on x86 has been added. Changes mostly
2081 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2084 * getaddrinfo now performs destination address selection according to
2089 * Thread-safe interfaces for many functions that access locale data
2090 were added in version 2.3, but these features were omitted from NEWS.
2091 Many functions have variants with an `_l' suffix that take a `locale_t'
2092 object as a parameter rather than consulting the current locale.
2093 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2094 create and maintain `locale_t' objects. Additionally, the new function
2095 `uselocale' sets "the current locale" (as used by functions not so
2096 parameterized) set for an individual thread. These features were added
2097 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2099 * The functions getresuid, getresgid, setresuid, and setresgid, which
2100 have long been available on Linux, are now declared in <unistd.h>
2101 and are now also available on the Hurd.
2103 * ELF thread-local storage support (TLS) now works on x86-64.
2105 * The new dynamic string token $LIB is expanded in shared library names.
2106 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2108 * Aldy Hernandez contributed complete software floating point support for
2109 PowerPC machines with no FPU.
2111 * fexecve is implemented on Linux.
2113 * The `btowc' function should work at least twice as fast due to
2114 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2116 * With approriate thread add-ons cancelable functions are now implemented
2117 in libc.so as well. No need to call the function in libpthread. This
2118 change allowed to finally disable the incorrect and expensive handling
2119 of weak definition in ld.so.
2121 * Yet more PLT entries in libc.so have been removed. We finally arrived
2122 at the bare minimum. Startup times improved appropriately.
2124 * Support for the new Linux/x86 system call interface was added. The
2125 AT_SYSINFO auxiliary vector entry is recognized and handled.
2129 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2132 * iconv (the program and the interface) now accepts empty names (excluding
2133 options like //TRANSLIT) to mean "use charset of current locale".
2135 * localedef can now transliterate characters in strings which are not in
2136 the provided charmap. The information from the input locale is used.
2138 * Prelinking support was added for ELF targets. This requires additional
2139 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2141 * Read-only stdio streams now use mmap to speed up operation by eliminating
2142 copying and buffer underflows. To use add 'm' to the mode string of
2143 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2145 * The malloc functions were completely rewritten by Wolfram Gloger based
2146 on Doug Lea's malloc-2.7.0.c.
2148 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2149 implementation of regex.
2151 * Bruno Haible upgraded the iconv and locale implementation to support
2154 * Contents of the LC_* and LANG environment variables in the CEN style are
2155 not recognized anymore. It never was used. Change by Ulrich Drepper.
2157 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2158 thread-local storage (TLS) ABI on some platforms.
2159 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2161 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2162 EUC-JISX0213, and TSCII.
2164 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2165 BSD-compatible interface for getting all network interface addresses.
2166 Implementation for IPv4 by Roland McGrath.
2168 * Loading of locale data is faster due to the introduction of a locale
2169 archive. Implemented by Roland McGrath and Ulrich Drepper.
2171 * Startup times are significantly reduced by not using exported functions
2172 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2175 * Steven Munroe contributed a port to PowerPC64/Linux.
2179 * The Hurd now uses the GNU libio implementation of stdio rather than the
2180 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2182 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2183 with the same behavior as the Linux system call of the same name.
2187 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2188 128-bit long double format.
2190 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2191 IBM1161, and IBM1162 charsets.
2193 * Andreas Jaeger contributed a port to x86-64/Linux.
2195 * Peter Bruin contributed a port to PowerPC/Hurd.
2197 * libc functions using I/O streams now can handle wide-oriented streams
2200 * optimizations in the dynamic linker. Binaries created by recent binutils
2201 versions start up quicker due to reduced time spent on relocations.
2203 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2207 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2208 asinh, atanh, j0 for the 128-bit long double format.
2210 * Bruno Haible updated all the code handling Unicode in some form to
2211 support Unicode 3.1.
2213 * Speed of regex for single-byte locales is back to previous levels.
2214 Patch by Isamu Hasegawa.
2216 * Alpha, SPARC, and IA-64 now also using floating stacks.
2218 * Startup time of internationalized applications greatly improved through
2219 iconv cache. Use iconvconfig to generate the cache file.
2220 Contributed by Ulrich Drepper.
2222 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2223 severe performance problems. Patch by David Mosberger.
2225 * The Hurd port got a lot more functionality like AIO, various stdio
2226 extensions, etc. Mainly done by Roland McGrath.
2228 * mtrace can now lookup symbols in shared libraries.
2232 * Intel's IA-64 math library is largely integrated. It provides fast and
2233 accurate implementatations for most basic and standard math functions
2234 in float, double, and long double format.
2236 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2237 and asin for the 96-bit long double format and asin, log, tan for the
2238 128-bit long double format.
2240 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2241 The basic double functions exist today. Contributed by Abraham Ziv
2242 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2243 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2245 * An asynchronous name lookup library was added. The interface is designed
2246 after POSIX AIO. The proposal was circulated beforehand to get comments.
2247 No negative ones came in. Implemented by Ulrich Drepper.
2249 * Port to S390/64bit contributed by Martin Schwidefsky
2250 <schwidefsky@de.ibm.com>.
2252 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2253 of functions for Linux/IA-64.
2255 * The RPC code is now thread safe. Threads can now use the same service
2256 of different services at the same time. Patch by Eric Norum
2257 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2259 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2260 family of functions for Linux/S390.
2262 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2263 of functions for Linux/x86.
2265 * Port to Linux/CRIS contributed by Axis Communications.
2269 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2270 we can now check for namespace violations and missing declarations. The
2271 result is that almost all headers are now Unix-compliant (as defined in
2272 the upcoming XPG6). The negative side is that some programs might need
2273 corrections, too, if they depend on the incorrect form of the headers in
2274 previous versions which defined too many symbols and included too many
2277 * regex now handles multibyte character sets correctly.
2278 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2280 * iconv (the program) does now conform to the upcoming XPG6 and handles
2281 charmaps. Instead of the charset names the path of charmaps can be
2282 provided and the conversion happens based on this data.
2283 Contributed by Ulrich Drepper.
2285 * The locale program now provides detailed information about the installed
2290 only lists the names of the supported locales
2294 provides details such as country, language, and codeset name.
2295 Contributed by Ulrich Drepper.
2299 * The gencat program now parses the input file according to the charset
2300 selected by the LC_CTYPE category. This is important for stateful
2301 character sets. To make generating catalogs easier there is a way
2302 to overwrite the charset selected by the locale: before the first
2303 message or $ quote line the catalog can contain a line like
2305 $ codeset=ISO-8859-2
2307 to select the charset (ISO-8859-2 in this case).
2309 Implemented by Shinya Hanataka and Ulrich Drepper.
2311 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2312 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2313 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2315 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2316 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2318 * The LANGUAGE environment variable is now ignored unless the locale is
2319 changed from the default "C" locale.
2321 * The usual bug fixes.
2325 * Greg McGary added runtime support for bounds checking using gcc's
2326 new -fbounded-pointers option. ix86 target is complete. PowerPC
2329 * Thorsten Kukuk added secure mode support to nscd.
2331 * The Berkeley db libraries have been removed.
2333 Related, the nss_db module is now in a separate package since it
2334 obviously requires a database library being available.
2336 * Wide character I/O streams implemented by Ulrich Drepper.
2338 * Functions from the extended socket API added by Ulrich Drepper.
2340 * Functions feenableexcept and fedisableexcept to control the
2341 behaviour of individual exceptions have been added by Andreas Jaeger.
2343 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2345 * The resolver code has been updated from bind 8.2.3-T5B which supports
2346 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2349 This change could in some situations effect backward compatibility. Since
2350 now `_res' is a thread-local instead of a global variable, modifying it
2351 in one thread does not have any effect in other threads.
2353 The resolver library was also extended to allow IPv6 as the transport
2354 protocol for the requests. This work was done by Stig Venaas.
2356 * Compatibility code for K&R C compilers has been removed from the
2357 header files. A ISO C compiler is needed to use the library
2358 (conforming to either C89 or C99 standard).
2360 * Complete rewrite of the localedef program to support multibyte character
2361 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2362 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2363 Implemented by Ulrich Drepper.
2365 Bruno Haible significantly improved the generation and use of the data
2366 structures for the wide character tables.
2368 * Plural handling in gettext implemented by Ulrich Drepper.
2370 * The utmp daemon has been removed.
2372 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2374 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2377 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2379 * POSIX barriers implemented by Kaz Kylheku.
2381 * POSIX spawn function family implemented by Ulrich Drepper.
2383 * POSIX spinlocks are now available.
2385 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2387 * the configure option --enable-kernel=X.Y.Z allows to strip out
2388 compatibility for kernel versions before X.Y.Z. This is currently only
2389 implemented for Linux.
2391 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2392 field sin6_scope_id. This means that all programs using IPv6 should be
2393 recompiled. Don't expect binary compatibility with previous glibc
2396 * various conversion modules for IBM character sets contributed by
2399 * IA-64 port by Jes Sorensen and HJ Lu.
2413 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2415 * New xdr functions are added; some rpc functions are now 64bit clean.
2417 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2419 * Fixed known incompatibilities with glibc 2.0.
2421 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2423 * Optimized a number of functions (especially the ELF dynamic loader).
2425 * Update timezone data files.
2427 * lots of charmaps corrections
2429 * some new locale definitions and charmaps
2434 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2435 conform to POSIX member type requirements. Symbol versions have been
2436 adjusted as needed within the library, and for direct use by applications,
2437 but there is potential for problems if third-party libraries use
2438 struct timeval as part of their interface. This does not present
2439 a problem for X and other "essential" system libraries.
2441 * An additional locale model to support C++ Standard Library locale
2442 model and probably more was implemented by Ulrich Drepper.
2444 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2447 * Miles Bader provided the `argp' function family to support hierachical
2448 command line argument parsing, layered on top of getopt.
2450 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2452 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2455 * scanf recognizes the %a and %A format for scanning floating point numbers.
2457 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2458 information and interfaces for the available integer types.
2460 * about 130 new math functions were added to implement the ISO C9x math
2463 * the new header <complex.h> contains definitions of the complex math
2464 functions from ISO C 9X.
2466 * the new header <tgmath.h> defines generic macros to use complex or
2467 real valued functions.
2469 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2471 * Andreas Jaeger provided a test suite for the math library.
2473 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2475 * Ulrich Drepper added character set conversion functions (iconv).
2477 * Optimized string functions have been added.
2479 * The localedata addon is now part of glibc.
2481 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2483 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2484 daemon for NSS (nscd).
2486 Missing a better place here are some numbers on improvements. Under
2487 Linux 2.1.125 un-tar-ing the kernel sources takes
2491 using local files 12.19s 6.88s 22.91s
2493 using NIS 13.92s 8.91s 26.34s
2495 using NIS & nscd 10.37s 7.34s 25.30s
2497 using NIS+ 27.57s 30.37s 640.46s
2499 using NIS+ & nscd 10.25s 7.83s 26.51s
2501 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2503 Keep in mind that non-namelookup related operations dominate above times.
2504 It was just a common complain that using NIS+ unpacking the kernel is
2507 [1] The old nscd implementation is not available anymore since it was
2508 distributed with glibc up to version 2.0.98 and thus is now replaced.
2510 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2512 * Mark Kettenis provided a Hesiod NSS module.
2514 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2515 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2517 * rcmd can now handle netgroups (Dick Streefland).
2519 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2522 * Support for the IPv6 protocol has been added to the socket API, as per the
2523 latest draft standards.
2525 * Support for Linux 2.2 has been added.
2527 * Interface changes relative to the latest 2.0.x release:
2528 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2529 addseverity NEW: Unix98
2530 alphasort64 NEW: LFS
2531 argp_err_exit_status NEW: argp, GNU ext
2532 argp_error NEW: argp, GNU ext
2533 argp_failure NEW: argp, GNU ext
2534 argp_help NEW: argp, GNU ext
2535 argp_parse NEW: argp, GNU ext
2536 argp_program_bug_address NEW: argp, GNU ext
2537 argp_program_version NEW: argp, GNU ext
2538 argp_program_version_hook NEW: argp, GNU ext
2539 argp_state_help NEW: argp, GNU ext
2540 argp_usage NEW: argp, GNU ext
2541 authdes_create NEW: Secure RPC
2542 authdes_getucred NEW: Secure RPC
2543 authdes_pk_create NEW: Secure RPC
2544 backtrace NEW: GNU ext.
2545 backtrace_symbols NEW: GNU ext.
2546 backtrace_symbols_fd NEW: GNU ext.
2548 cacosf NEW: ISO C 9x
2549 cacosh NEW: ISO C 9x
2550 cacoshf NEW: ISO C 9x
2551 cacoshl NEW: ISO C 9x
2552 cacosl NEW: ISO C 9x
2559 casinf NEW: ISO C 9x
2560 casinh NEW: ISO C 9x
2561 casinhf NEW: ISO C 9x
2562 casinhl NEW: ISO C 9x
2563 casinl NEW: ISO C 9x
2565 catanf NEW: ISO C 9x
2566 catanh NEW: ISO C 9x
2567 catanhf NEW: ISO C 9x
2568 catanhl NEW: ISO C 9x
2569 catanl NEW: ISO C 9x
2570 cbc_crypt NEW: Secure RPC
2574 ccoshf NEW: ISO C 9x
2575 ccoshl NEW: ISO C 9x
2581 cimagf NEW: ISO C 9x
2582 cimagl NEW: ISO C 9x
2583 clearerr_locked REMOVED
2584 clntunix_create NEW: sunrpc ext
2586 clog10 NEW: ISO C 9x
2587 clog10f NEW: ISO C 9x
2588 clog10l NEW: ISO C 9x
2598 cprojf NEW: ISO C 9x
2599 cprojl NEW: ISO C 9x
2601 crealf NEW: ISO C 9x
2602 creall NEW: ISO C 9x
2607 csinhf NEW: ISO C 9x
2608 csinhl NEW: ISO C 9x
2611 csqrtf NEW: ISO C 9x
2612 csqrtl NEW: ISO C 9x
2616 ctanhf NEW: ISO C 9x
2617 ctanhl NEW: ISO C 9x
2619 des_setparity NEW: Secure RPC
2620 ecb_crypt NEW: Secure RPC
2621 endutxent NEW: Unix98
2623 exp10f NEW: ISO C 9x
2624 exp10l NEW: ISO C 9x
2628 fattach NEW: STREAMS
2629 fdetach NEW: STREAMS
2633 feclearexcept NEW: ISO C 9x
2634 fegetenv NEW: ISO C 9x
2635 fegetexceptflag NEW: ISO C 9x
2636 fegetround NEW: ISO C 9x
2637 feholdexcept NEW: ISO C 9x
2639 feraiseexcept NEW: ISO C 9x
2640 ferror_locked REMOVED
2641 fesetenv NEW: ISO C 9x
2642 fesetexceptflag NEW: ISO C 9x
2643 fesetround NEW: ISO C 9x
2644 fetestexcept NEW: ISO C 9x
2645 feupdateenv NEW: ISO C 9x
2646 fflush_locked REMOVED
2650 fgets_unlocked NEW: GNU ext.
2651 fileno_locked REMOVED
2663 fputc_locked REMOVED
2664 fputs_unlocked NEW: GNU ext.
2665 fread_unlocked NEW: GNU ext.
2670 fstatvfs NEW: Unix98
2674 ftruncate64 NEW: LFS
2676 fwrite_unlocked NEW: GNU ext.
2677 gai_strerror NEW: IPv6
2681 getchar_locked REMOVED
2683 getdate_err NEW: Unix98
2684 getdate_r NEW: GNU ext.
2686 getnameinfo NEW: IPv6
2687 getnetname NEW: Secure RPC
2688 getpmsg NEW: STREAMS
2689 getpt NEW: Unix98 PTY
2690 getrlimit64 NEW: LFS
2691 getutxent NEW: Unix98
2692 getutxid NEW: Unix98
2693 getutxline NEW: Unix98
2694 glob64 NEW: GNU ext.
2695 globfree64 NEW: GNU ext.
2696 gnu_get_libc_release NEW: GNU ext.
2697 gnu_get_libc_version NEW: GNU ext.
2698 grantpt NEW: Unix98 PTY
2699 host2netname NEW: Secure RPC
2701 iconv_close NEW: iconv
2702 iconv_open NEW: iconv
2703 if_freenameindex NEW: IPv6
2704 if_indextoname NEW: IPv6
2705 if_nameindex NEW: IPv6
2706 if_nametoindex NEW: IPv6
2707 in6addr_any NEW: IPv6
2708 in6addr_loopback NEW: IPv6
2709 inet6_isipv4mapped NEW: IPv6
2710 isastream NEW: STREAMS
2711 iswblank NEW: GNU ext.
2712 key_decryptsession NEW: Secure RPC
2713 key_decryptsession_pk NEW: Secure RPC
2714 key_encryptsession NEW: Secure RPC
2715 key_encryptsession_pk NEW: Secure RPC
2716 key_gendes NEW: Secure RPC
2717 key_get_conv NEW: Secure RPC
2718 key_secretkey_is_set NEW: Secure RPC
2719 key_setnet NEW: Secure RPC
2720 key_setsecret NEW: Secure RPC
2721 llrint NEW: ISO C 9x
2722 llrintf NEW: ISO C 9x
2723 llrintl NEW: ISO C 9x
2724 llround NEW: ISO C 9x
2725 llroundf NEW: ISO C 9x
2726 llroundl NEW: ISO C 9x
2731 lrintf NEW: ISO C 9x
2732 lrintl NEW: ISO C 9x
2733 lround NEW: ISO C 9x
2734 lroundf NEW: ISO C 9x
2735 lroundl NEW: ISO C 9x
2737 makecontext NEW: Unix98
2738 mempcpy NEW: GNU ext.
2741 modify_ldt NEW: kernel
2745 nearbyint NEW: ISO C 9x
2746 nearbyintf NEW: ISO C 9x
2747 nearbyintl NEW: ISO C 9x
2748 netname2host NEW: Secure RPC
2749 netname2user NEW: Secure RPC
2750 nexttoward NEW: ISO C 9x
2751 nexttowardf NEW: ISO C 9x
2752 nexttowardl NEW: ISO C 9x
2756 passwd2des NEW: Secure RPC
2758 pow10f NEW: GNU ext.
2759 pow10l NEW: GNU ext.
2762 printf_size NEW: GNU ext.
2763 printf_size_info NEW: GNU ext.
2764 profil_counter REMOVED
2765 pthread_mutexattr_getkind_np REPLACED
2766 pthread_mutexattr_setkind_np REPLACED
2767 ptsname NEW: Unix98 PTY
2768 ptsname_r NEW: Unix98 PTY
2770 putchar_locked REMOVED
2771 putgrent NEW: GNU ext.
2773 putpmsg NEW: STREAMS
2774 pututxline NEW: Unix98
2778 readdir64_r NEW: LFS
2779 remquo NEW: ISO C 9x
2780 remquof NEW: ISO C 9x
2781 remquol NEW: ISO C 9x
2783 roundf NEW: ISO C 9x
2784 roundl NEW: ISO C 9x
2786 scalbln NEW: ISO C 9x
2787 scalblnf NEW: ISO C 9x
2788 scalblnl NEW: ISO C 9x
2790 sendfile NEW: kernel
2791 setcontext NEW: Unix98
2792 setrlimit64 NEW: LFS
2793 setutxent NEW: Unix98
2795 sigignore NEW: Unix98
2796 sigqueue NEW: POSIX.1b
2797 sigrelse NEW: Unix98
2798 sigset NEW: POSIX.1b
2799 sigtimedwait NEW: POSIX.1b
2800 sigwaitinfo NEW: POSIX.1b
2801 sincos NEW: GNU ext.
2802 sincosf NEW: GNU ext.
2803 sincosl NEW: GNU ext.
2807 strcasestr NEW: GNU ext.
2808 strtoimax NEW: ISO C 9x
2809 strtoumax NEW: ISO C 9x
2810 strverscmp NEW: GNU ext.
2811 svcauthdes_stats NEW: Secure RPC
2812 svcunix_create NEW: sunrpc etx
2813 svcunixfd_create NEW: sunrpc ext
2814 swapcontext NEW: Unix98
2815 tcgetsid NEW: Unix98 PTY
2816 tdestroy NEW: GNU ext.
2817 tgamma NEW: ISO C 9x
2818 tgammaf NEW: ISO C 9x
2819 tgammal NEW: ISO C 9x
2823 truncf NEW: ISO C 9x
2824 truncl NEW: ISO C 9x
2826 unlockpt NEW: Unix98 PTY
2827 updwtmpx NEW: Unix98
2828 user2netname NEW: Secure RPC
2829 utmpxname NEW: Unix98
2830 versionsort NEW: GNU ext.
2831 versionsort64 NEW: GNU ext.
2833 wcscasecmp NEW: GNU ext.
2834 wcsncasecmp NEW: GNU ext.
2835 wcsnlen NEW: GNU ext.
2836 wcstoimax NEW: ISO C 9x
2837 wcstoll NEW: ISO C 9x
2838 wcstoull NEW: ISO C 9x
2839 wcstoumax NEW: ISO C 9x
2841 wordexp NEW: POSIX.2
2842 wordfree NEW: POSIX.2
2843 write_profiling REMOVED
2844 xdecrypt NEW: Secure RPC
2845 xdr_authdes_cred NEW: Secure RPC
2846 xdr_authdes_verf NEW: Secure RPC
2847 xdr_cryptkeyarg NEW: Secure RPC
2848 xdr_cryptkeyarg2 NEW: Secure RPC
2849 xdr_cryptkeyres NEW: Secure RPC
2850 xdr_getcredres NEW: Secure RPC
2851 xdr_key_netstarg NEW: Secure RPC
2852 xdr_key_netstres NEW: Secure RPC
2853 xdr_keybuf NEW: Secure RPC
2854 xdr_keystatus NEW: Secure RPC
2855 xdr_netnamestr NEW: Secure RPC
2856 xdr_sizeof NEW: Secure RPC
2857 xdr_unixcred NEW: sunrpc ext
2858 xencrypt NEW: Secure RPC
2859 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2870 * inet_ntoa is thread-safe
2872 * updwtmp is moved from libutil to libc
2874 * rewrite of cbrt function
2876 * update of timezone data
2890 * add atoll function
2892 * fix complex problems in Berkeley DB code
2894 * fix math functions
2898 * fixed lots of header problems (especially Linux/GNU specific)
2900 * dynamic loader preserves all registers
2902 * Roland McGrath provided support for handling of auxiliary objects in
2903 the ELF dynamic loader.
2905 * support for parallel builds is improved
2909 * GNU extensions are no longer declared by default. To enable them you
2910 must define the macro `_GNU_SOURCE' in your program or compile with
2913 * The library has changed from using GNU ld symbol aliases to using weak
2914 symbols where available. The ELF object file format supports weak
2915 symbols; GNU ld also supports weak symbols in the a.out format. (There
2916 is also now support for other GNU ld extensions in ELF. Use the
2917 `--with-elf' option to configure to indicate you have ELF, and
2918 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2919 of many files which contained only symbol aliases, reducing the size of
2920 the source and the compiled library; many other files were renamed to
2921 less cryptic names previously occupied by the symbol alias files.
2922 There is a new header file <elf.h> for programs which operate on
2923 files in the ELF format.
2925 * Converted to Autoconf version 2, so `configure' has more options.
2926 Run `configure --help' to see the details.
2928 * The library can now be configured to build profiling, highly-optimized
2929 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2930 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2931 `configure' enable building these extra libraries. The shared library is
2932 built by default when using both ELF and GNU ld. When shared libraries
2933 are enabled, the new library `-ldl' is available for arbitrary run-time
2934 loading of shared objects; its interface is defined in <dlfcn.h>. The
2935 new header file <link.h> gives access to the internals of the run-time
2936 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2937 application of same name on other systems and it provides information
2938 about dynamically linked binaries.
2940 * The C library now provides the run-time support code for profiling
2941 executables compiled with `-pg'. Programs can control the profiling code
2942 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2943 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2944 the support for this file format was contributed by David Mosberger-Tang.
2946 * The math code has been replaced with a math library based on fdlibm from
2947 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2948 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2949 functions. The math functions now reside in a separate library, so
2950 programs using them will need to use `-lm' their linking commands.
2952 * John C. Bowman contributed optimized ix87 assembler inline functions.
2954 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2955 mechanism similar to that found in Solaris 2. This is now used for the
2956 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2957 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2958 file controls what services are used for each individual database. This
2959 works by loading shared libraries with names specified in `nsswitch.conf',
2960 so service modules can be changed or added at any time without even
2961 relinking any program. Currently there are the file, db, and NIS based
2962 NSS services available.
2964 * The new functions `strtoq' and `strtouq' parse integer values from
2965 strings, like `strtol' and `strtoul', but they return `long long int' and
2966 `unsigned long long int' values, respectively (64-bit quantities).
2968 * The new functions `strtof' and `strtold' parse floating-point values from
2969 strings, like `strtod', but they return `float' and `long double' values,
2970 respectively (on some machines `double' and `long double' are the same).
2972 * Ulrich Drepper has contributed new implementations of the floating-point
2973 printing and reading code used in the `printf' family of functions and
2974 `strtod', `strtof', and `strtold'. These new functions are perfectly
2975 accurate, and much faster than the old ones.
2977 * The implementation of the POSIX locale model was completely rewritten by
2978 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2979 to compile the POSIX locale definition.
2981 * The former dummy implementations of the strcoll and strxfrm function are
2982 now replaced by fully functional code contributed by Ulrich Drepper. The
2983 collation information comes from the POSIX locale definitions.
2985 * The new header <langinfo.h> defines an interface for accessing
2986 various locale-dependent data (using the locale chosen with `setlocale').
2988 * Ulrich Drepper has contributed a new suite of functions for operation on
2989 wide-character and multibyte-character strings, in <wchar.h>;
2990 and classification and case conversion of wide characters, in <wctype.h>.
2991 These new functions are conforming to the ISO C, Amendement 1 specification.
2993 * There is now a second implementation of the standard I/O library available.
2994 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2995 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2997 * You can now use positional parameter specifications in format strings
2998 for the `printf' and `scanf' families of functions. For example,
2999 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3000 ``Number 6, Mr Jones''. This is mainly useful when providing different
3001 format strings for different languages, whose grammars may dictate
3002 different orderings of the values being printed. To support this
3003 feature, the interface for `register_printf_handler' has changed; see
3004 the header file <printf.h> for details.
3006 * The `printf' and `scanf' families of functions now understand a new
3007 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3008 to group numbers as indicated by the locale; for `scanf' and friends, this
3009 says to accept as valid only a number with all the proper grouping
3010 separators in the right places. In the default "C" locale, numbers are
3011 not grouped; but locales for specific countries will define the usual
3012 conventions (i.e. separate thousands with `,' in the US locale).
3014 * The pgrp functions have been regularized, slightly incompatibly but much
3015 less confusingly. The core functions are now `getpgid' and `setpgid',
3016 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3017 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3018 provided for compatibility. There is no longer an incompatible `getpgrp'
3019 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3021 * The new header file <fts.h> and suite of functions simplify programs that
3022 operate on directory trees. This code comes from 4.4 BSD.
3024 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3025 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3026 NSS scheme used in glibc.
3028 * There is a new malloc debugging hook `__memalign_hook'.
3030 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3031 `unsigned int' in <sys/types.h>. These are for compatibility only and
3032 their use is discouraged.
3034 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3035 done differently, so that it works even without GNU ld.
3037 * New function `euidaccess' checks allowed access to a file like `access',
3038 but using the effective IDs instead of the real IDs.
3040 * The time zone data files have been updated for the latest and greatest
3041 local time conventions of the countries of the world.
3043 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3046 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3047 for formatting floating-point numbers. They are provided only for
3048 compatibility; new programs should use `sprintf' instead. There are
3049 also equivalent function for the `long double' floating-point type and
3050 all functions also exist in a reentrant form.
3052 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3053 functions for maintaining the login-record files (primarily of use to
3054 system programs such as `login'), and convenient functions for
3055 allocating and initializing a pseudo-terminal (pty) device.
3057 * Ulrich Drepper has contributed new support for System V style
3058 shared memory and IPC on systems that support it.
3060 * Ulrich Drepper has contributed several miscellaneous new functions found
3061 in System V: The `hsearch' family of functions provide an effective
3062 implementation of hash tables; `a64l' and `l64a' provide a very simple
3063 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3066 * Ulrich Drepper has contributed new reentrant counterparts for the
3067 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3069 * Ulrich Drepper has contributed new, highly-optimized versions of several
3070 string functions for the i486/Pentium family of processors.
3072 * Ulrich Drepper has updated the Linux-specific code, based largely
3073 on work done in Hongjiu Lu's version of GNU libc for Linux.
3074 The GNU library now supports Linux versions 2.0.10 and later,
3075 using the ELF object file format (i[3456]86-*-linux).
3077 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3079 * David Mosberger-Tang and Richard Henderson have ported the C library
3080 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3081 dynamic linking support for ELF/Alpha.
3083 * Richard Henderson contributed several Alpha optimized assembler function
3084 for arithmetic and string handling.
3086 * Ulrich Drepper has contributed a new set of message catalog functions to
3087 support multiple languages using the <libintl.h> interface, for use with
3088 his new package GNU gettext. Translation volunteers have contributed
3089 catalogs of the library's messages in Spanish, German, and Korean.
3091 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3092 program and the `catgets' function for reading the catalog files it
3093 creates. (The <libintl.h> interface is preferred; we include the
3094 <nl_types.h> interface using `catgets' only for source compatibility with
3095 programs already written to use it.)
3097 * New header file <values.h> gives SVID-compatible names for <limits.h>
3100 * Various new macros, declarations, and small header files for compatibility
3103 * New function `group_member' is a convenient way to check if a process has
3104 a given effective group ID.
3106 * When using GCC 2.7 and later, the socket functions are now declared in a
3107 special way so that passing an argument of type `struct sockaddr_in *',
3108 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3109 `struct sockaddr *' type, does not generate a type-clash warning.
3111 * New function `error' declared in header file <error.h> is a convenient
3112 function for printing error messages and optionally exiting; this is the
3113 canonical function used in GNU programs. The new functions `err', `warn',
3114 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3115 doing the same thing.
3117 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3118 POSIX.2 `glob' function to do ~ and {...} expansion.
3120 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3121 `clearenv' which is used in POSIX.9 is also available.
3123 * New function `getsid' returns session ID number on systems that support it.
3125 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3126 files <db.h> and <mpool.h> provide a rich set of functions for several
3127 types of simple databases stored in memory and in files, and <ndbm.h> is
3128 an old `ndbm'-compatible interface using the `db' functions. Link with
3129 `-ldb' to get these functions.
3131 * New macro `strdupa' copies a string like `strdup', but uses local stack
3132 space from `alloca' instead of dynamic heap space from `malloc'.
3134 * New function `strnlen' is like `strlen' but searches only a given maximum
3135 number of characters for the null terminator. `stpncpy', `strndup' and
3136 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3139 * New function `statfs' in header <sys/statfs.h>.
3141 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3142 provide convenient functions for operating on blocks of null-terminated
3145 * A new suite of functions in <utmp.h> handle all the details of reading
3146 and writing the utmp file.
3148 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3151 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3152 completely POSIX compliant and also implemented the extended functionality
3153 to handle alternate digit representation and alternate era date formats.
3155 * Ulrich Drepper provided an implementation of the `strptime' function
3156 defined in XPG4.2 which transforms a string into a `struct tm' value.
3158 * Paul Eggert provided the tzselect shell script as part of the timezone
3159 code. The shell script makes it easy to select the correct timezone
3162 * The implementation of the malloc family of functions is completely replaced
3163 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3164 The implementation uses the mmap function (if available) and it is
3165 optimized for the use in multi threaded programs.
3167 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3168 functions. This new functionality is usable by specifying a special
3169 salt string and it is compatible with implementation on *BSD systems.
3171 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3172 `getsubopt' to handle second level command line options, `bsd_signal'
3173 to access BSD style `signal' functionality, the obsolete `regexp' style
3176 * the `lchown' function is available on system which support this
3179 * The implementation of the shadow password handling function was contributed
3182 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3184 * POSIX.1g support was added. The <sys/select.h> header is available,
3185 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3186 implementation of `getaddrinfo'.
3190 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3192 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3193 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3195 * The new function `daemon' from 4.4 BSD is useful for server programs that
3196 want to put themselves in the background.
3198 * Joel Sherrill has contributed support for several standalone boards that
3199 run without an operating system.
3201 * `printf', `scanf' and friends now accept a `q' type modifier for long
3202 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3204 * All of the code taken from BSD (notably most of the math and networking
3205 routines) has been updated from the BSD 4.4-Lite release.
3207 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3209 * The new functions `getdomainname' and `setdomainname' fetch or change the
3210 YP/NIS domain name. These are system calls which exist on systems which
3213 * The time zone data files have been updated for the latest international
3216 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3217 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3221 * The C library now includes support for Sun RPC, from Sun's free
3222 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3223 are included. (There is still no support for YP.)
3225 * Tom Quinn has contributed a port of the C library to SGI machines running
3226 Irix 4 (mips-sgi-irix4).
3228 * The new `lockf' function is a simplified interface to the locking
3229 facilities of `fcntl', included for compatibility.
3231 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3233 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3235 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3238 * The error message printed by `assert' for a failed assertion now includes
3239 the name of the program (if using GNU ld) and the name of the calling
3240 function (with versions of GCC that support this).
3242 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3244 * The library now includes the <sys/mman.h> header file and memory
3245 management functions `mmap', `munmap', `mprotect', `msync', and
3246 `madvise', on systems that support those facilities.
3248 * The interface for `mcheck' has changed slightly: the function called to
3249 abort the program when an allocation inconsistency is detected now takes
3250 an argument that indicates the type of failure. The new function
3251 `mprobe' lets you request a consistency check for a particular block at
3252 any time (checks are normally done only when you call `free' or `realloc'
3255 * It is now possible to easily cross-compile the C library, building on one
3256 system a library to run on another machine and/or operating system. All
3257 you need to do is set the variable `HOST_CC' in `configparms' to the
3258 native compiler for programs to run on the machine you are building on (a
3259 few generator programs are used on Unix systems); set `CC' to the
3262 * The new function `fexecve' (only implemented on the GNU system) executes
3263 a program file given a file descriptor already open on the file.
3267 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3268 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3270 * You can set the variable `libprefix' in `configparms' to specify a prefix
3271 to be prepended to installed library files; this makes it easy to install
3272 the GNU C library to be linked as `-lgnuc' or whatever.
3274 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3275 copies a limited number of characters from a string, and returns the
3276 address of the last character written.
3278 * You no longer need to check for whether the installed `stddef.h' is
3279 compatible with the GNU C library. configure now checks for you.
3281 * You can now define a per-stream `fileno' function to convert the
3282 stream's cookie into an integral file descriptor.
3284 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3285 allocates zero bytes of storage, and returns a unique pointer which
3286 you can pass to `realloc' or `free'. The behavior is undefined if
3287 you dereference this pointer.
3289 * The C library now runs on Sony NEWS m68k machines running either
3290 NewsOS 3 or NewsOS 4.
3292 * The new `syscall' function is a system-dependent primitive function
3293 for invoking system calls. It has the canonical behavior on Unix
3294 systems, including unreliable return values for some calls (such as
3295 `pipe', `fork' and `getppid').
3297 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3298 to `EAGAIN', which is the preferred name. On systems whose kernels
3299 use two distinct codes, the C library now translates EWOULDBLOCK to
3300 EAGAIN in every system call function.
3304 * The GNU C Library Reference Manual is now distributed with the library.
3305 `make dvi' will produce a DVI file of the printed manual.
3306 `make info' will produce Info files that you can read on line using C-h i
3307 in Emacs or the `info' program.
3308 Please send comments on the manual to bug-glibc-manual@gnu.org.
3310 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3312 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3314 * Jason Merrill has contributed a port to the Sequent Symmetry running
3315 Dynix version 3 (i386-sequent-dynix).
3317 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3318 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3320 * New function `memory_warnings' lets you arrange to get warnings when
3321 malloc is running out of memory to allocate, like Emacs gives you.
3323 * The C library now contains the relocating allocator used in Emacs 19 for
3324 its editing buffers. This allocator (ralloc) minimizes allocation
3325 overhead and fragmentation by moving allocated regions around whenever it
3326 needs to. You always refer to a ralloc'd region with a "handle" (a
3327 pointer to a pointer--an object of type `void **').
3329 * There is a new `printf' format: `%m' gives you the string corresponding
3330 to the error code in `errno'.
3332 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3333 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3334 pass, the `a' modifier says to fill in a `char **' you pass with a
3337 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3338 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3339 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3341 * `mkstemp' is a traditional Unix function to atomically create and open a
3342 uniquely-named temporary file.
3346 * The standard location for the file that says what the local timezone is
3347 has changed again. It is now `/usr/local/etc/localtime' (or more
3348 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3350 * The distribution no longer contains any files with names longer than 14
3353 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3354 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3356 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3360 * The configuration process has changed quite a bit. The `configure'
3361 script is now used just like the configuration scripts for other GNU
3362 packages. The `sysdeps' directory hierarchy is much rearranged.
3363 The file `INSTALL' explains the new scheme in detail.
3365 * The header files no longer need to be processed into ANSI C and
3366 traditional C versions. There is just one set of files to install, and
3367 it will work with ANSI or old C compilers (including `gcc -traditional').
3369 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3370 MIPS DECStation running Ultrix 4.
3372 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3373 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3374 made itself into a shared library.
3376 * Yet further improved support for the i386, running 4.3 BSD-like systems
3377 (such as Mach 3 with the Unix single-server), or System V.
3379 * New function `strncasecmp' to do case-insensitive string comparison
3380 with limited length.
3382 * New function `strsep' is a reentrant alternative to `strtok'.
3384 * New functions `scandir' and `alphasort' for searching directories.
3386 * New function `setenv' is a better interface to `putenv'.
3388 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3389 function for traversing a directory tree.
3391 * The GNU obstack package is now also part of the C library.
3392 The new function `open_obstack_stream' creates a stdio stream that
3393 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3394 formatted output directly to an obstack.
3396 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3397 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3399 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3401 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3402 things to your strings.
3404 * There are some new test programs: test-fseek, testmb, and testrand.
3406 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3407 These ports are not finished, but are a good starting place for really
3408 supporting those systems.
3410 * `/etc/localtime' is now the standard location for the file that says what
3411 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3412 This follows the general principle that `/etc' is the place for all local
3413 configuration files.
3415 * The C library header files now use `extern "C"' when used by the C++
3416 compiler, so the C library should now work with C++ code.
3418 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3419 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3422 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3423 function which uses the `merge sort' algorithm, and is said to be
3424 significantly faster than the old GNU `qsort' function. Merge sort is
3425 now the standard `qsort' function. The new algorithm can require a lot
3426 of temporary storage; so, the old sorting function is called when the
3427 required storage is not available.
3429 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3430 provides the Unix `crypt' function, plus some other entry points.
3432 * The code and header files taken from 4.4 BSD have been updated with the
3433 latest files released from Berkeley.
3435 ----------------------------------------------------------------------
3436 Copyright information:
3438 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3440 Permission is granted to anyone to make or distribute verbatim copies
3441 of this document as received, in any medium, provided that the
3442 copyright notice and this permission notice are preserved,
3443 thus giving the recipient permission to redistribute in turn.
3445 Permission is granted to distribute modified versions
3446 of this document, or of portions of it,
3447 under the above conditions, provided also that they
3448 carry prominent notices stating who last changed them.
3451 version-control: never