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 * The fesetexcept and fetestexceptflag functions from TS 18661-1:2014 are
38 Security related changes:
40 On ARM EABI (32-bit), generating a backtrace for execution contexts which
41 have been created with makecontext could fail to terminate due to a
42 missing .cantunwind annotation. This has been observed to lead to a hang
43 (denial of service) in some Go applications compiled with gccgo. Reported
44 by Andreas Schwab. (CVE-2016-6323)
46 The following bugs are resolved with this release:
48 [The release manager will add the list generated by
49 scripts/list-fixed-bugs.py just before the release.]
53 * The minimum Linux kernel version that this version of the GNU C Library
54 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
55 kernel version 2.6.32 or later suffices (on architectures that already
56 required kernel versions more recent than 3.2, those requirements remain
57 unchanged). Linux 3.2 or later kernel headers are required on all
60 * The pap_AN locale has been deleted. This has been deprecated for a long
61 time. It has been replaced by pap_AW & pap_CW, both of which have long
62 been included in previous releases.
64 * The readdir_r and readdir64_r functions have been deprecated. It is
65 recommended to use readdir and readdir64 instead.
67 * The type “union wait” has been removed. It was deprecated in the early
68 1990s and never part of POSIX. Application code should use the int type
69 instead of “union wait”.
71 * A new NSS action is added to facilitate large distributed system
72 administration. The action, MERGE, allows remote user stores like LDAP
73 to be merged into local user stores like /etc/groups in order to provide
74 easy to use, updated, and managed sets of merged credentials. The new
75 action can be used by configuring it in /etc/nsswitch.conf:
76 group: files [SUCCESS=merge] nis
77 Implemented by Stephen Gallagher (Red Hat).
79 * The deprecated __malloc_initialize_hook variable has been removed from the
82 * The long unused localedef --old-style option has been removed. It hasn't
83 done anything in over 16 years. Scripts using this option can safely
86 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
87 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
88 return the next representable value in the direction of positive infinity
89 and the nextdown functions return the next representable value in the
90 direction of negative infinity. These are currently enabled as GNU
93 Security related changes:
95 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
96 could result in a stack overflow when getnetbyname was called with an
97 overly long name. (CVE-2016-3075)
99 * Previously, getaddrinfo copied large amounts of address data to the stack,
100 even after the fix for CVE-2013-4458 has been applied, potentially
101 resulting in a stack overflow. getaddrinfo now uses a heap allocation
102 instead. Reported by Michael Petlan. (CVE-2016-3706)
104 * The glob function suffered from a stack-based buffer overflow when it was
105 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
106 Reported by Alexander Cherepanov. (CVE-2016-1234)
108 * The Sun RPC UDP client could exhaust all available stack space when
109 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
110 alloca plugin for GCC. (CVE-2016-4429)
112 * The IPv6 name server management code in libresolv could result in a memory
113 leak for each thread which is created, performs a failing naming lookup,
114 and exits. Over time, this could result in a denial of service due to
115 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
117 The following bugs are resolved with this release:
119 [1170] localedata: ne_NP: update Nepali locale definition file
120 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
122 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
123 [6796] math: fdim() does not set errno on overflow
124 [10354] libc: posix_spawn should use vfork() in more cases than presently
125 [11213] localedata: localedata: add copyright disclaimer to locale files
126 [12143] localedata: chr_US: new Cherokee locale
127 [12450] localedata: sgs_LT: new locale
128 [12676] localedata: ln_CD: new locale
129 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
131 [13304] math: fma, fmaf, fmal produce wrong results
132 [14259] build: --localedir arg to configure is ignored
133 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
134 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
135 [14934] localedata: es_CL: wrong first weekday chilean locale
136 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
138 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
140 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
141 [15368] nptl: raise() is not async-signal-safe
142 [15479] math: ceil, floor, round and trunc raise inexact exception
143 [15578] localedata: kk_KZ: various updates
144 [16003] localedata: pap_AN: punt old locale
145 [16137] localedata: iw_IL: punt old locale
146 [16190] localedata: eo: new esperanto locale
147 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
148 [16742] malloc: race condition: pthread_atfork() called before first
149 malloc() results in unexpected locking behaviour/deadlocks
150 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
152 [16983] localedata: postal_fmt does not allow %l and %n modifiers
153 [17565] localedata: pt_PT: wrong (work-)week start
154 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
155 [17950] build: Build fails with -msse
156 [18205] localedata: be_BY*: wrong first_weekday and first_workday
157 [18433] libc: posix_spawn does not return correctly upon failure to
159 [18453] localedata: charmaps/IBM875: incorrect codes
160 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
162 [18896] localedata: he_IL: improvements for currency
163 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
165 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
167 [19056] libc: Deprecate readdir_r
168 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
170 [19198] localedata: nl_NL: small improvements for Dutch locales
171 [19257] network: Per-thread memory leak in __res_vinit with IPv6
172 nameservers (CVE-2016-5417)
173 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
175 [19400] locale: Language missing in "iso-639.def", trivial fix in
177 [19431] malloc: Deadlock between fflush, getdelim, and fork
178 [19505] libc: Incorrect file descriptor validity checks in
179 posix_spawn_file_actions_add{open,close,dup2}
180 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
182 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
183 `intl/{gettextP,loadinfo}.h'
184 [19534] libc: execle, execlp may use malloc
185 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
186 [19573] network: res_nclose and __res_maybe_init disagree about name
187 server initialization, breaking Hesiod
188 [19575] localedata: Status of GB18030 tables
189 [19581] localedata: sr_* date_fmt string contains additional newline
190 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
192 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
193 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
194 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
195 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
197 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
199 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
201 [19610] dynamic-link: ldconfig -X removes stale symbolic links
202 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
203 [19633] locale: strfmon_l applies global locale to number formatting
204 [19642] network: Memory leak in getnameinfo
205 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
206 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
208 [19654] math: [x86_64] Need testcase for BZ #19590 fix
209 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
211 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
212 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
214 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
216 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
218 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
219 pointers and lengths in error-case.
220 [19727] locale: Converting from/to UTF-xx with iconv() does not always
221 report errors on UTF-16 surrogates values.
222 [19755] nscd: nscd assertion failure in gc
223 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
224 [19759] libc: mempcpy shouldn't be inlined
225 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
226 [19765] libc: s390 needs an optimized mempcpy
227 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
228 NAME_MAX limit assumption (CVE-2016-1234)
229 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
230 [19787] network: Missing and incorrect truncation checks in getnameinfo
231 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
233 [19791] network: Assertion failure in res_query.c with un-connectable name
235 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
236 [19822] math: libm.so install clobbers old version
237 [19825] network: resolv: send_vc can return uninitialized data in second
238 response to getaddrinfo
239 [19830] network: nss_dns: should check RDATA length against buffer length
240 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
241 confronted with A/AAAA records of invalid size
242 [19837] nss: nss_db: No retries for some long lines with a larger buffer
243 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
244 [19853] stdio: Printing IBM long double in decimal with high precision is
246 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
247 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
248 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
250 [19865] network: Assertion failure or memory leak in
251 _nss_dns_getcanonname_r
252 [19868] network: nss_dns: netent code does not skip over non-PTR records
253 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
255 [19881] string: Improve x86-64 memset
256 [19907] string: Incorrect memcpy tests
257 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
259 [19925] libc: termios.h XCASE namespace
260 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
261 [19929] libc: limits.h NL_NMAX namespace
262 [19931] stdio: Memory leak in vfprintf
263 [19957] libc: clone(CLONE_VM) access invalid parent memory
264 [19963] localedata: en_IL: New locale
265 [19989] stdio: stdio.h cuserid namespace
266 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
268 [19996] locale: langinfo.h nl_langinfo_l namespace
269 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
270 [20010] network: getaddrinfo: Stack overflow in hostent translation
272 [20012] stdio: libio: fmemopen append mode failure
273 [20014] stdio: stdio.h namespace for pre-threads POSIX
274 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
275 [20023] libc: fcntl.h timespec namespace
276 [20024] math: [x86_64] vectorized sincos trashes the stack
277 [20031] network: nss_hesiod: Heap overflow in get_txt_records
278 [20041] time: sys/time.h timespec namespace
279 [20043] libc: unistd.h missing cuserid for UNIX98 and before
280 [20044] libc: unistd.h missing pthread_atfork for UNIX98
281 [20051] libc: ttyslot in wrong header under wrong conditions
282 [20054] libc: gethostname not declared for XPG4
283 [20055] libc: termios.h missing tcgetsid for XPG4
284 [20072] dynamic-link: x86 init_cpu_features is called twice in static
286 [20073] libc: sys/stat.h fchmod namespace
287 [20074] libc: stdlib.h rand_r namespace
288 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
289 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
291 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
292 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
294 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
295 [20119] libc: Wrong mask for processors level type from CPUID
296 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
297 AS not supporting AVX512
298 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
300 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
301 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
303 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
304 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
305 [20178] libc: posix_spawn{p} should not call exit
306 [20191] stdio: libio: vtables hardening
307 [20195] string: FMA4 detection requires CPUID execution with register
309 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
310 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
312 [20212] math: acos (sNaN) returns sNaN
313 [20213] math: asin (sNaN) returns sNaN
314 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
315 [20218] math: [i386] asinhl (sNaN) returns sNaN
316 [20219] math: [i386] atanhl (sNaN) returns sNaN
317 [20222] stdio: fopencookie: Mangle function pointers
318 [20224] math: [i386] cbrtl (sNaN) returns sNaN
319 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
320 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
322 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
323 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
324 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
325 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
326 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
327 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
328 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
329 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
330 [20240] math: modf (sNaN) returns sNaN
331 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
332 [20250] math: frexp (sNaN) returns sNaN
333 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
334 [20255] math: [i386] fdim, fdimf return with excess range and precision /
336 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
337 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
338 subscript is below array bounds [-Werror=array-bounds]
339 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
340 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
342 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
343 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
345 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
347 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
348 [20316] localedata: id_ID: Februari instead of Pebruari
349 [20327] string: POWER8 strcasecmp returns incorrect result
350 [20347] math: Failure: Test: j0_downward (0xap+0)
351 [20348] libc: FAIL: misc/tst-preadvwritev64
352 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
353 [20350] libc: There is no test for p{read,write}64
354 [20357] math: Incorrect cos result for 1.5174239687223976
355 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
359 * Unicode 8.0.0 Support: Character encoding, character type info, and
360 transliteration tables are all updated to Unicode 8.0.0, using new
361 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
362 These updates cause user visible changes, such as the fixes for bugs
363 89, 16061, and 18568.
365 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
366 kernel-internal CPU set size. This means that requests that change the
367 CPU affinity which failed before (for example, an all-ones CPU mask) will
368 now succeed. Applications that need to determine the effective CPU
369 affinities need to call sched_getaffinity or pthread_getaffinity_np after
370 setting it because the kernel can adjust it (and the previous size check
371 would not detect this in the majority of cases).
373 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
374 the following new symbols are used: fts64_children, fts64_close,
375 fts64_open, fts64_read and fts64_set.
377 * getaddrinfo now detects certain invalid responses on an internal netlink
378 socket. If such responses are received, an affected process will
379 terminate with an error message of "Unexpected error <number> on netlink
380 descriptor <number>" or "Unexpected netlink response of size <number> on
381 descriptor <number>". The most likely cause for these errors is a
382 multi-threaded application which erroneously closes and reuses the netlink
383 file descriptor while it is used by getaddrinfo.
385 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
386 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
387 unnecessary serialization of memory allocation requests across threads.
388 The defect is now corrected. Users should see a substantial increase in
389 the concurent throughput of allocation requests for applications which
390 trigger this bug. Affected applications typically create and
391 destroy threads frequently. (Bug 19048 was reported and analyzed by
394 * There is now a --disable-timezone-tools configure option for disabling the
395 building and installing of the timezone related utilities (zic, zdump, and
396 tzselect). This is useful for people who build the timezone data and code
397 independent of the GNU C Library.
399 * The obsolete header <regexp.h> has been removed. Programs that require
400 this header must be updated to use <regex.h> instead.
402 * The obsolete functions bdflush, create_module, get_kernel_syms,
403 query_module and uselib are no longer available to newly linked binaries;
404 the header <sys/kdaemon.h> has been removed. These functions and header
405 were specific to systems using the Linux kernel and could not usefully be
406 used with the GNU C Library on systems with version 2.6 or later of the
409 * Optimized string, wcsmbs and memory functions for IBM z13.
410 Implemented by Stefan Liebler.
412 * Newly linked programs that define a variable called signgam will no longer
413 have it set by the lgamma, lgammaf and lgammal functions. Programs that
414 require signgam to be set by those functions must ensure that they use the
415 variable provided by the GNU C Library and declared in <math.h>, without
416 defining their own copy.
418 * The minimum GCC version that can be used to build this version of the GNU
419 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
420 still be used to compile programs using the GNU C Library.
422 Security related changes:
424 * An out-of-bounds value in a broken-out struct tm argument to strftime no
425 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
427 * The LD_POINTER_GUARD environment variable can no longer be used to disable
428 the pointer guard feature. It is always enabled. Previously,
429 LD_POINTER_GUARD could be used to disable security hardening in binaries
430 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
433 * An integer overflow in hcreate and hcreate_r could lead to an
434 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
436 * The catopen function no longer has unbounded stack usage. Reported by
439 * The nan, nanf and nanl functions no longer have unbounded stack usage
440 depending on the length of the string passed as an argument to the
441 functions. Reported by Joseph Myers. (CVE-2014-9761)
443 * A stack-based buffer overflow was found in libresolv when invoked from
444 libnss_dns, allowing specially crafted DNS responses to seize control
445 of execution flow in the DNS client. The buffer overflow occurs in
446 the functions send_dg (send datagram) and send_vc (send TCP) for the
447 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
448 family. The use of AF_UNSPEC triggers the low-level resolver code to
449 send out two parallel queries for A and AAAA. A mismanagement of the
450 buffers used for those queries could result in the response of a query
451 writing beyond the alloca allocated buffer created by
452 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
453 the overflow. Thanks to the Google Security Team and Red Hat for
454 reporting the security impact of this issue, and Robert Holiday of
455 Ciena for reporting the related bug 18665. (CVE-2015-7547)
457 The following bugs are resolved with this release:
459 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
460 [887] math: Math library function "logb" and "nextafter" inconsistent
461 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
462 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
463 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
464 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
466 [4404] localedata: German translation of "Alarm clock" is misleading
467 [6799] math: nextafter() and nexttoward() doen't set errno on
468 overflow/underflow errors
469 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
471 [10432] nis: _nss_nis_setnetgrent assertion failure
472 [11460] libc: fts has no LFS support
473 [12926] network: getaddrinfo()/make_request() may spin forever
474 [13065] nptl: Race condition in pthread barriers
475 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
476 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
478 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
479 [14912] libc: Rename non-installed bits/*.h headers
480 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
481 [15367] math: Let gcc use __builtin_isinf
482 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
483 [15421] math: lgamma wrongly sets signgam for ISO C
484 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
485 FE_INVALID with argument out of range
486 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
488 [15786] dynamic-link: ifunc resolver functions can smash function
490 [15918] math: Unnecessary check for equality in hypotf()
491 [16061] localedata: Review / update transliteration data
492 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
494 [16141] time: strptime %z offset restriction
495 [16171] math: drem should be alias of remainder
496 [16296] math: fegetround is pure?
497 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
498 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
500 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
501 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
503 [16422] math: [powerpc] math-float, math-double failing llrint tests with
504 "Exception "Inexact" set" on ppc32
505 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
506 [16517] math: Missing underflow exception from tanf/tan/tanl
507 [16519] math: Missing underflow exception from sinhf
508 [16520] math: Missing underflow exception from tanhf
509 [16521] math: Missing underflow exception from exp2
510 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
512 [16734] stdio: fopen calls mmap to allocate its buffer
513 [16961] math: nan function incorrect handling of bad sequences
514 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
515 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
516 [16985] locale: localedef: confusing error message when opening output
518 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
519 [17197] locale: Redundant shift character in iconv conversion output at
521 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
522 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
523 [17250] dynamic-link: static linking breaks nss loading
524 (getaddrinfo/getpwnam/etc...)
525 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
527 [17441] math: isnan() should use __builtin_isnan() in GCC
528 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
529 (related to lock elision)
530 [17787] manual: Exponent on page 324 of the PDF ends prematurely
531 [17886] time: strptime should be able to parse "Z" as a timezone with %z
532 [17887] time: strptime should be able to parse "+01:00" style timezones
533 [17905] libc: catopen() Multiple unbounded stack allocations
535 [18084] libc: backtrace (..., 0) dumps core on x86
536 [18086] libc: nice() sets errno to 0 on success
537 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
538 is too large (CVE-2015-8778)
539 [18251] dynamic-link: SONAME missing when audit modules provides path
540 [18265] libc: add attributes for wchar string and memory functions
541 [18370] math: csqrt missing underflows
542 [18421] libc: [hppa] read-only segment has dynamic relocations
543 [18472] libc: Obsolete syscall wrappers should be compat symbols
544 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
545 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
546 [18525] localedata: Remove locale timezone information
547 [18560] libc: [powerpc] spurious bits/ipc.h definitions
548 [18568] localedata: Update locale data to Unicode 8.0
549 [18589] locale: sort-test.sh fails at random
550 [18595] math: ctan, ctanh missing underflows
551 [18604] libc: assert macro-expands its argument
552 [18610] math: S390: fetestexcept() reports any exception if DXC-code
553 contains a vector instruction exception.
554 [18611] math: j1, jn missing errno setting on underflow
555 [18618] localedata: sync Chechen locale definitions with other *_RU
557 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
558 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
559 [18665] network: In send_dg, the recvfrom function is NOT always using the
560 buffer size of a newly created buffer (CVE-2015-7547)
561 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
563 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
565 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
566 [18699] math: tilegx cproj() for various complex infinities does not yield
568 [18724] libc: Harden put*ent functions against data injection
569 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
570 [18755] build: build errors with -DNDEBUG
571 [18757] stdio: fmemopen fails to set errno on failure
572 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
574 [18781] libc: openat64 lacks O_LARGEFILE
575 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
576 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
577 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
578 [18790] math: [ldbl-128ibm] tanhl inaccurate
579 [18795] libc: stpncpy fortification misses buffer lengths that are
581 [18796] build: build fails for --disable-mathvec
582 [18803] math: hypot missing underflows
583 [18820] stdio: fmemopen may leak memory on failure
584 [18823] math: csqrt spurious underflows
585 [18824] math: fma spurious underflows
586 [18825] math: pow missing underflows
587 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
588 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
589 [18870] build: sem_open.c fails to compile with missing symbol
591 [18872] stdio: Fix memory leak in printf_positional
592 [18873] libc: posix_fallocate overflow check ineffective
593 [18875] math: Excess precision leads incorrect libm
594 [18877] libc: arm: mmap offset regression
595 [18887] libc: memory corruption when using getmntent on blank lines
596 [18918] localedata: hu_HU: change time to HH:MM:SS format
597 [18921] libc: Regression: extraneous stat() and fstat() performed by
599 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
600 binaries (CVE-2015-8777)
601 [18951] math: tgamma missing underflows
602 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
604 [18953] localedata: lt_LT: change currency symbol to the euro
605 [18956] math: powf inaccuracy
606 [18961] math: [i386] exp missing underflows
607 [18966] math: [i386] exp10 missing underflows
608 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
609 [18969] build: multiple string test failures due to missing locale
611 [18970] libc: Reference of pthread_setcancelstate in libc.a
612 [18977] math: float / long double Bessel functions not in XSI POSIX
613 [18980] math: i386 libm functions return with excess range and precision
614 [18981] math: i386 scalb*, ldexp return with excess range and precision
615 [18982] stdio: va_list and vprintf
616 [18985] time: Passing out of range data to strftime() causes a segfault
618 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
619 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
620 [19012] locale: iconv_open leaks memory on error path
621 [19016] math: clog, clog10 inaccuracy
622 [19018] nptl: Mangle function pointers in tls_dtor_list
623 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
624 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
625 [19048] malloc: malloc: arena free list can become cyclic, increasing
627 [19049] math: [powerpc] erfc incorrect zero sign
628 [19050] math: [powerpc] log* incorrect zero sign
629 [19058] math: [x86_64] Link fail with -fopenmp and -flto
630 [19059] math: nexttoward overflow incorrect in non-default rounding modes
631 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
632 [19074] network: Data race in _res_hconf_reorder_addrs
633 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
634 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
635 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
637 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
639 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
640 [19086] manual: posix_fallocate64 documented argument order is wrong.
641 [19088] math: lround, llround missing exceptions close to overflow
643 [19094] math: lrint, llrint missing exceptions close to overflow threshold
644 [19095] math: dbl-64 lrint incorrect for 64-bit long
645 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
646 [19124] dynamic-link: ld.so failed to build with older assmebler
647 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
648 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
649 [19134] math: [powerpc32] lround, lroundf spurious exceptions
650 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
651 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
652 pthread_setaffinity_np
653 [19156] math: [ldbl-128] j0l spurious underflows
654 [19164] nptl: tst-getcpu fails with many possible CPUs
655 [19168] math: math/test-ildoubl and math/test-ldouble failure
656 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
657 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
659 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
660 (FE_NOMASK_ENV) do not clear SSE exceptions
661 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
662 _int_new_arena/reused_arena
663 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
664 [19201] math: dbl-64 remainder incorrect sign of zero result
665 [19205] math: bits/math-finite.h conditions do not match math.h and
667 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
668 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
669 for C99-based standards
670 [19212] libc: features.h not -Wundef clean
671 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
673 [19214] libc: Family and model identification for AMD CPU's are incorrect.
674 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
675 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
677 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
679 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
681 [19242] libc: strtol incorrect in Turkish locales
682 [19243] malloc: reused_arena can pick an arena on the free list, leading
683 to an assertion failure and reference count corruption
684 [19253] time: tzset() ineffective when temporary TZ did not include DST
686 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
687 [19270] math: [hppa] Shared libm missing __isnanl
688 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
689 MAP_HUGETLB and MAP_STACK defines
690 [19313] nptl: Wrong __cpu_mask for x32
691 [19347] libc: grantpt: try to force a specific gid even without pt_chown
692 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
693 [19350] math: [ldbl-128ibm] sinhl spurious overflows
694 [19351] math: [ldbl-128ibm] logl inaccurate near 1
695 [19363] time: x32: times() return value wrongly truncates/sign extends
697 [19367] dynamic-link: Improve branch prediction on Silvermont
698 [19369] network: Default domain name not reset by res_ninit when "search"
699 / "domain" entry is removed from resolv.conf
700 [19375] math: powerpc: incorrect results for POWER7 logb with negative
702 [19385] localedata: bg_BG: time separator should be colon, not comma
703 [19408] libc: linux personality syscall wrapper may erroneously return an
704 error on 32-bit architectures
705 [19415] libc: dladdr returns wrong names on hppa
706 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
707 IBM905, IBM907, and IBM909
708 [19439] math: Unix98 isinf and isnan functions conflict with C++11
709 [19443] build: build failures with -DDEBUG
710 [19451] build: Make check fails on test-double-vlen2
711 [19462] libc: Glibc failed to build with -Os
712 [19465] math: Wrong code with -Os
713 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
715 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
717 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
718 [19486] math: S390: Math tests fail with "Exception Inexact set".
719 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
720 [19550] libc: [mips] mmap negative offset handling inconsistent with other
722 [19590] math: Fail to build shared objects that use libmvec.so functions.
726 * The following bugs are resolved with this release:
728 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
729 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
730 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
731 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
732 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
733 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
734 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
735 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
736 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
737 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
738 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
739 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
740 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
741 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
742 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
743 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
744 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
745 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
746 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
747 18657, 18676, 18694, 18696, 18887.
749 * Cache information can be queried via sysconf() function on s390 e.g. with
750 _SC_LEVEL1_ICACHE_SIZE as argument.
752 * A buffer overflow in gethostbyname_r and related functions performing DNS
753 requests has been fixed. If the NSS functions were called with a
754 misaligned buffer, the buffer length change due to pointer alignment was
755 not taken into account. This could result in application crashes or,
756 potentially arbitrary code execution, using crafted, but syntactically
757 valid DNS responses. (CVE-2015-1781)
759 * The time zone file parser has been made more robust against crafted time
760 zone files, avoiding heap buffer overflows related to the processing of
761 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
762 large time zone data files. Overly long time zone specifiers in the TZ
763 variable no longer result in stack overflows and crashes.
765 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
766 for LD and GD on x86 and x86-64, has been implemented. You will need
767 binutils-2.24 or later to enable this optimization.
769 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
770 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
771 Hat). These updates cause user visible changes, such as the fix for bug
774 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
775 and getXXbyYY NSS calls for the same database, causing a denial-of-service
776 condition in some applications.
778 * Added vector math library named libmvec with the following vectorized x86_64
779 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
781 The library can be disabled with --disable-mathvec. Use of the functions is
782 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
783 Shared library libmvec.so is linked in as needed when using -lm (no need to
784 specify -lmvec explicitly for not static builds).
785 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
787 * A new fmemopen implementation has been added with the goal of POSIX
788 compliance. The new implementation fixes the following long-standing
789 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
790 old implementation is still present for use be by existing binaries.
792 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
793 releases. It has been fixed to match 2.19 and older, but binaries built
794 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
796 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
797 Contributed by Roland McGrath (Google).
799 * The header <regexp.h> is deprecated, and will be removed in a future
800 release. Use of this header will trigger a deprecation warning.
801 Application developers should update their code to use <regex.h> instead.
803 This header was formerly part of SUS, but was deprecated in 1994 and
804 removed from the standard in 2001. Also, the glibc implementation
805 leaks memory. See BZ#18681 for more details.
809 * The following bugs are resolved with this release:
811 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
812 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
813 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
814 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
815 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
816 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
817 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
818 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
819 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
820 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
823 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
824 too little memory for the to-be-scanned arguments and overflow the
825 allocated buffer. The implementation now correctly computes the required
826 buffer size when using malloc, and switches to malloc from alloca as
829 * A new semaphore algorithm has been implemented in generic C code for all
830 machines. Previous custom assembly implementations of semaphore were
831 difficult to reason about or ensure that they were safe. The new version
832 of semaphore supports machines with 64-bit or 32-bit atomic operations.
833 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
834 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
836 * Port to Altera Nios II has been contributed by Mentor Graphics.
838 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
839 implementations for powerpc64/powerpc64le.
840 Implemented by Adhemerval Zanella (IBM).
842 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
843 and powerpc64le. This may improve lock scaling of existing programs on
844 HTM capable systems. The lock elision code is only enabled with
845 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
846 powerpc will issue a transaction abort on every syscall to avoid side
847 effects being visible outside transactions.
849 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
850 AArch64. Contributed by ARM Ltd.
852 * i386 memcpy functions optimized with SSE2 unaligned load/store.
854 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
855 under certain input conditions resulting in the execution of a shell for
856 command substitution when the application did not request it. The
857 implementation now checks WRDE_NOCMD immediately before executing the
858 shell and returns the error WRDE_CMDSUB as expected.
860 * CVE-2012-3406 printf-style functions could run into a stack overflow when
861 processing format strings with a large number of format specifiers.
863 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
864 infinite loop if the DNS response contained a PTR record of an unexpected
867 * The minimum GCC version that can be used to build this version of the GNU
868 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
869 still be used to compile programs using the GNU C Library.
871 * The GNU C Library is now built with -Werror by default. This can be
872 disabled by configuring with --disable-werror.
874 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
876 * The obsolete sigvec function has been removed. This was the original
877 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
878 programs have been using instead for about 25 years. Of course, ABI
879 compatibility for old binaries using sigvec remains intact.
881 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
882 with newer versions of bison.
884 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
885 The original MIPS o32 hard-float ABI requires an FPU where double-precision
886 registers overlay two consecutive single-precision registers. MIPS32R2
887 introduced a new FPU mode (FR=1) where double-precision registers extend the
888 corresponding single-precision registers which is incompatible with the
889 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
890 require the use of FR=1 making a transition necessary. New o32 ABI
891 extensions enable users to migrate over time from the original o32 ABI
892 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
893 tracks the ABI of any loaded object and verifies that new objects are
894 compatible. Mode transitions will also be requested as required and
895 unsupportable objects will be rejected. The ABI checks include both soft and
896 hard float ABIs for o32, n32 and n64.
898 GCC 5 with GNU binutils 2.25 onwards:
899 It is strongly recommended that all o32 system libraries are built using the
900 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
901 with the original and all new o32 ABI extensions. Configure a MIPS GCC
902 compiler using --with-fp-32=xx to set this by default.
906 * The following bugs are resolved with this release:
908 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
909 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
910 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
911 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
912 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
913 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
914 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
915 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
916 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
917 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
918 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
919 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
920 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
921 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
922 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
924 * Reverted change of ABI data structures for s390 and s390x:
925 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
926 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
927 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
928 are preserved pointing straight to the same implementation as the old ones.
929 Given that, new callers will simply provide a too-big buffer to these
930 functions. Any applications/libraries out there that embed jmp_buf or
931 ucontext_t in an ABI-relevant data structure that have already been rebuilt
932 against 2.19 headers will have to rebuilt again. This is necessary in any
933 case to revert the breakage in their ABI caused by the glibc change.
935 * Support for file description locks is added to systems running the
936 Linux kernel. The standard file locking interfaces are extended to
937 operate on file descriptions, not file descriptors, via the use of
938 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
939 are associated with an open file instead of a process.
941 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
943 * The minimum Linux kernel version that this version of the GNU C Library
944 can be used with is 2.6.32.
946 * Running the testsuite no longer terminates as soon as a test fails.
947 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
948 with PASS or FAIL lines for individual tests. A summary of the results is
949 printed, including a list of failing lists, and "make check" exits with
950 error status if there were any unexpected failures. "make check
951 stop-on-test-failure=y" may be used to keep the old behavior.
953 * The am33 port, which had not worked for several years, has been removed
956 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
957 supported; they now act the same as _DEFAULT_SOURCE (but generate a
958 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
959 conflicted with POSIX (support for which was removed in 2.19), the
960 interfaces those macros enabled remain available when compiling with
961 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
964 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
966 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
967 This may improve lock scaling of existing programs on TX capable systems.
968 The lock elision code is only built with --enable-lock-elision=yes and
969 then requires a GCC version supporting the TX builtins. With lock elision
970 default mutexes are elided via __builtin_tbegin, if the cpu supports
971 transactions. By default lock elision is not enabled and the elision code
974 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
975 copy the path argument. This allowed programs to cause posix_spawn to
976 deference a dangling pointer, or use an unexpected pathname argument if
977 the string was modified after the posix_spawn_file_actions_addopen
980 * All supported architectures now use the main glibc sysdeps directory
981 instead of some being in a separate "ports" directory (which was
982 distributed separately before glibc 2.17).
984 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
985 On configurations that support it (all Linux configurations), it's now
986 used regardless of the --enable-add-ons switch to configure. It is no
987 longer possible to build such configurations without pthreads support.
989 * Locale names, including those obtained from environment variables (LANG
990 and the LC_* variables), are more tightly checked for proper syntax.
991 setlocale will now fail (with EINVAL) for locale names that are overly
992 long, contain slashes without starting with a slash, or contain ".." path
993 components. (CVE-2014-0475) Previously, some valid locale names were
994 silently replaced with the "C" locale when running in AT_SECURE mode
995 (e.g., in a SUID program). This is no longer necessary because of the
998 * On x86-64, the dynamic linker's lazy-binding support is now compatible
999 with application code using Intel MPX instructions. (With all previous
1000 versions, the MPX register state could be clobbered when making calls
1001 into or out of a shared library.) Note that while the new dynamic
1002 linker is compatible with all known x86 hardware whether or not it
1003 supports Intel MPX, some x86 instruction-set emulators might fail to
1004 handle the new instruction encodings. This is known to affect Valgrind
1005 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1006 release), and might affect other tools that do instruction emulation.
1008 * Support for loadable gconv transliteration modules has been removed.
1009 The support for transliteration modules has been non-functional for
1010 over a decade, and the removal is prompted by security defects. The
1011 normal gconv conversion modules are still supported. Transliteration
1012 with //TRANSLIT is still possible, and the //IGNORE specifier
1013 continues to be supported. (CVE-2014-5119)
1015 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1016 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1017 resulting a denial-of-service security vulnerability in applications which
1018 use functions related to iconv. (CVE-2014-6040)
1022 * The following bugs are resolved with this release:
1024 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1025 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1026 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1027 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1028 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1029 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1030 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1031 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1032 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1033 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1034 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1035 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1036 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1037 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1038 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1039 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1040 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1041 16431, 16453, 16474, 16506, 16510, 16529
1043 * Slovenian translations for glibc messages have been contributed by the
1044 Translation Project's Slovenian team of translators.
1046 * The public headers no longer use __unused nor __block. This change is to
1047 support compiling programs that are derived from BSD sources and use
1048 __unused internally, and to support compiling with Clang's -fblock
1049 extension which uses __block.
1051 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1052 large collation sequences to optimize multiple passes. This cache
1053 computation may overflow for large collation sequences and may cause a
1054 stack or buffer overflow. This is now fixed to use a slower algorithm
1055 which does not use a cache if there is an integer overflow.
1057 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1058 rules for large collation sequences to optimize multiple passes and falls
1059 back to alloca if malloc fails, resulting in a possible stack overflow.
1060 The implementation now falls back to an uncached collation sequence lookup
1063 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1064 initialized for static applications resulting in the security feature
1065 being disabled. The pointer guard is now correctly initialized to a
1066 random value for static applications. Existing static applications need
1067 to be recompiled to take advantage of the fix (bug 15754).
1069 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1070 to the d_name member of struct dirent, or omit the terminating NUL
1071 character. (Bugzilla #14699).
1073 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1074 aligned_alloc functions could allocate too few bytes or corrupt the
1075 heap when passed very large allocation size values (Bugzilla #15855,
1078 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1079 for AF_INET6 has been fixed (Bugzilla #16072).
1081 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1082 pap_CW, quz_PE, the_NP.
1084 * Substantially revised locales: gd_GB, ht_HT
1086 * The LC_ADDRESS field was updated to support country_car for almost all
1089 * ISO 1427 definitions were updated.
1091 * ISO 3166 definitions were updated.
1093 * The localedef utility now supports --big-endian and --little-endian
1094 command-line options to generate locales for a different system from that
1095 for which the C library was built.
1097 * Binary locale files now only depend on the endianness of the system for
1098 which they are generated and not on other properties of that system. As a
1099 consequence, binary files generated with new localedef may be incompatible
1100 with old versions of the GNU C Library, and binary files generated with
1101 old localedef may be incompatible with this version of the GNU C Library,
1102 in the following circumstances:
1104 + Locale files may be incompatible on m68k systems.
1106 + Locale archive files (but not separate files for individual locales) may
1107 be incompatible on systems where plain "char" is signed.
1109 * The configure option --disable-versioning has been removed. Builds with
1110 --disable-versioning had not worked for several years.
1112 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1113 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1115 * SystemTap probes for malloc have been introduced.
1117 * SystemTap probes for slow multiple precision fallback paths of
1118 transcendental functions have been introduced.
1120 * Support for powerpc64le has been added.
1122 * The soft-float powerpc port now supports e500 processors.
1124 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1126 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1127 set of header declarations that are enabled by default, even when other
1128 feature test macros or compiler options such as -std=c99 would otherwise
1129 disable some of those declarations.
1131 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1132 conflict with POSIX. The libbsd-compat library (which was a dummy library
1133 that did nothing) has also been removed.
1135 * Preliminary documentation about Multi-Thread, Async-Signal and
1136 Async-Cancel Safety has been added.
1138 * Change of ABI data structures for s390 and s390x:
1139 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1140 allow for future hardware extensions. All library functions that accept or
1141 return these structures were versioned in order to provide backwards
1142 compatibility with existing code. However, not all cases can be handled
1143 with interface versioning. If an application embeds either structure into
1144 another structure and that structure is passed to another compilation unit
1145 which expects the newer larger-sized object then any access to the new
1146 fields will result in undefined behaviour. Similarly any access to fields
1147 that were moved by the enlarging of the structures will cause undefined
1148 behaviour. To fix the undefined behaviour all objects that are part of the
1149 final in-memory image must agree on the size of structures, and this may
1150 require recompilation.
1154 * The following bugs are resolved with this release:
1156 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1157 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1158 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1159 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1160 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1161 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1162 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1163 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1164 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1165 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1166 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1167 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1168 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1171 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1172 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1173 Distributions can re-enable building and using pt_chown via the new configure
1174 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1175 considerable security risks and should only be used if the distribution
1176 understands and accepts the risks.
1178 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1181 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1182 fixed (Bugzilla #15330).
1184 * Add support for calling C++11 thread_local object destructors on thread
1185 and program exit. This needs compiler support for offloading C++11
1186 destructor calls to glibc.
1188 * Improved worst case performance of libm functions with double inputs and
1191 * Support for priority inherited mutexes in pthread condition variables on
1192 non-x86 architectures.
1194 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1196 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1198 * Optimized string functions for ARM. Implemented by Will Newton and
1201 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1203 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1206 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1207 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1209 * Added a benchmark framework to track performance of functions in glibc.
1211 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1212 It is based on draft TS 18661 and currently enabled as a GNU extension.
1214 * On Linux, the clock function now uses the clock_gettime system call
1215 for improved precision, rather than old times system call.
1217 * Added support for version-3 tz format files. This is needed when using
1218 the tz database release 2013e or later, and affects a few unusual cases --
1219 currently only TZ='America/Godthab' for time stamps after 2037.
1221 * Added new API functions pthread_getattr_default_np and
1222 pthread_setattr_default_np to get and set the default pthread
1223 attributes of a process.
1225 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1226 This may improve lock scaling of existing programs on TSX capable systems.
1227 When the --enable-lock-elision=yes parameter is specified at configure
1228 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1231 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1232 availability). Implemented by Ryan S. Arnold.
1234 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1238 * The following bugs are resolved with this release:
1240 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1241 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1242 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1243 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1244 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1245 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1246 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1247 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1248 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1249 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1250 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1251 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1252 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1253 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1254 14879, 14889, 14893, 14898, 14914.
1256 * Optimization of memcpy for MIPS.
1258 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1259 EMFILE has been fixed (Bugzilla #14889).
1261 * The add-on ports collection is now distributed in the "ports" subdirectory
1262 of the main GNU C Library distribution, rather than separately.
1264 * Port to ARM AArch64 contributed by Linaro.
1266 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1267 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1269 Implemented by Andreas Krebbel.
1271 * The new function secure_getenv allows secure access to the environment,
1272 returning NULL if running in a SUID/SGID process. This function replaces
1273 the internal function __secure_getenv.
1275 * SystemTap static probes have been added into the dynamic linker.
1276 Implemented by Gary Benson.
1278 * Optimizations of string functions strstr, strcasestr and memmem.
1279 Implemented by Maxim Kuvyrkov.
1281 * The minimum Linux kernel version that this version of the GNU C Library
1282 can be used with is 2.6.16.
1284 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1285 powerpc POWER7. Implemented by Will Schmidt.
1287 * New configure option --disable-nscd builds the C library such that it
1288 never attempts to contact the Name Service Caching Daemon (nscd).
1289 New configure option --disable-build-nscd avoids building nscd itself;
1290 this is the default if --disable-nscd is used.
1292 * Improved support for cross-compilation, including cross-testing and
1293 bootstrap builds without a previously built glibc.
1295 * Several testsuite tests are now able to test multiple IFUNC variants of an
1296 interface, rather than just testing the one that would be chooen by
1299 * New configure options --with-bugurl and --with-pkgversion, for
1300 distributors to use to embed their bug-reporting and package version
1301 information in --help and --version output.
1303 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1304 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1305 allows creation of chroots without the procfs mounted on /proc.
1307 * The `crypt' function now fails if passed salt bytes that violate the
1308 specification for those values. On Linux, the `crypt' function will
1309 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1310 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1311 when the mode is enabled.
1313 * The `clock_*' suite of functions (declared in <time.h>) is now available
1314 directly in the main C library. Previously it was necessary to link with
1315 -lrt to use these functions. This change has the effect that a
1316 single-threaded program that uses a function such as `clock_gettime' (and
1317 is not linked with -lrt) will no longer implicitly load the pthreads
1318 library at runtime and so will not suffer the overheads associated with
1319 multi-thread support in other code such as the C++ runtime library.
1321 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1326 * The following bugs are resolved with this release:
1328 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1329 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1330 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1331 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1332 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1333 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1334 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1335 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1336 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1337 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1338 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1339 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1340 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1341 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1342 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1343 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1344 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1345 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1346 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1347 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1348 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1349 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1352 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1353 configuring glibc with:
1354 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1355 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1356 Implemented by H.J. Lu.
1360 + define static_assert
1362 + do not declare gets
1364 + declare at_quick_exit and quick_exit also for ISO C11
1366 + aligned_alloc. NB: The code is deliberately allows the size parameter
1367 to not be a multiple of the alignment. This is a moronic requirement
1368 in the standard but it is only a requirement on the caller, not the
1371 + timespec_get added
1373 + uchar.h support added
1375 + CMPLX, CMPLXF, CMPLXL added
1377 Implemented by Ulrich Drepper.
1379 * Support for the IA-64 has been moved to ports.
1381 * Remove support for anything but ELF binary format
1383 * Checking versions of poll, ppoll added.
1384 Implemented by Ulrich Drepper.
1386 * More generic and 64-bit performance optimizations to math functions.
1387 Implemented by Ulrich Drepper.
1389 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1390 headers and functions available at compile time as they were before
1391 version 2.14. This option will be removed at some time in the future
1392 after the TI-RPC library becomes fully sufficient for the needs of
1393 existing applications.
1395 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1396 Note that glibc is not expected to work with any Linux kernel version
1399 * New header <sys/auxv.h> and function getauxval allowing easy access to
1400 the AT_* key-value pairs passed from the Linux kernel. The header also
1401 defines the HWCAP_* bits associated with the AT_HWCAP key.
1403 * New locales: mag_IN
1405 * New configure option --enable-systemtap builds SystemTap static probes
1406 into libc for setjmp and longjmp and into libpthread for various operations.
1407 So far the setjmp/longjmp probes and some of the libpthread probes are
1408 provided only for i*86 and x86_64.
1409 Implemented by Roland McGrath and Rayson Ho.
1411 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1413 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1416 * More optimized functions for SPARC. Implemented by David S. Miller.
1418 * Improved support for cross-compilation, especially bootstrap builds
1419 without a previously built glibc.
1421 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1422 Chris Metcalf from Tilera.
1424 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1425 now supported for ARM processors.
1427 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1428 as the name of the dynamic linker, to distinguish it from the
1429 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1431 * Support for CRIS has been removed from ports.
1433 * A new class of installed header has been documented for low-level
1434 platform-specific functionality. PowerPC added the first instance with a
1435 function to provide time base register access. Contributed by Tulio
1436 Magno Quites Machado Filho.
1438 * ix86 configurations now install header files that are consistent with
1439 what x86-64 configurations install. These same header files can be used
1440 for -m32, -m64, or -mx32 builds.
1441 Contributed by H.J. Lu.
1443 * Math library bug fixes. A thorough audit of all open math library bugs was
1444 conducted by Joseph Myers. Significant progress was made on many math
1445 library bugs resulting in more accurate exceptions and function results.
1446 Many thanks to all those that contributed including Andreas Jaeger for his
1447 patch review and work on the x87 trigonometric instruction issues.
1449 * Timezone data is no longer installed. Timezone-related binaries and scripts
1450 will continue to be installed. Users should obtain their timezone data from
1451 their distribution provider or from the tzdata package at
1452 <ftp://munnari.oz.au/pub/>.
1456 * The following bugs are resolved with this release:
1458 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1459 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1460 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1461 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1462 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1463 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1464 13484, 13506, 13515, 13523, 13524, 13538, 13540
1466 * New program pldd to list loaded object of a process
1467 Implemented by Ulrich Drepper.
1469 * Add nss_db support back to glibc. No more dependency on Berkeley db
1470 and support for initgroups lookups.
1471 Implemented by Ulrich Drepper.
1473 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1474 Contributed by HJ Lu.
1476 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1477 Contributed by HJ Lu.
1479 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1480 on x86-32 and x86-64.
1481 Contributed by Liubov Dmitrieva.
1483 * Optimized strchr and strrchr for SSE on x86-32.
1484 Contributed by Liubov Dmitrieva.
1486 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1487 for x86-64 and x86-32.
1488 Contributed by Liubov Dmitrieva.
1490 * New interfaces: scandirat, scandirat64
1491 Implemented by Ulrich Drepper.
1493 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1494 Implemented by Ulrich Drepper.
1496 * nscd now also caches the netgroup database.
1497 Implemented by Ulrich Drepper.
1499 * Integrate libm with gcc's -ffinite-math-only option.
1500 Implemented by Ulrich Drepper.
1502 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1503 to math functions. Implemented by Ulrich Drepper.
1505 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1506 Implemented by Ulrich Drepper.
1508 * New Linux interfaces: process_vm_readv, process_vm_writev
1510 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1511 Implemented by Ulrich Drepper.
1513 * Optimized nearbyint and strcasecmp for PPC.
1514 Implemented by Adhemerval Zanella.
1516 * New locales: bho_IN, unm_US, es_CU, ta_LK
1520 * The following bugs are resolved with this release:
1522 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1523 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1524 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1525 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1526 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1527 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1528 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1529 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1530 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1531 12795, 12811, 12813, 12814, 12841
1533 * The RPC implementation in libc is obsoleted. Old programs keep working
1534 but new programs cannot be linked with the routines in libc anymore.
1535 Programs in need of RPC functionality must be linked against TI-RPC.
1536 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1538 Visible changes of this change include (obviously) the inability to link
1539 programs using RPC functions without referencing the TI-RPC library and the
1540 removal of the RPC headers from the glibc headers.
1541 Implemented by Ulrich Drepper.
1543 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1544 syncfs, setns, sendmmsg
1546 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1547 yue_HK, lij_IT, mhr_RU
1549 * New encodings: CP770, CP771, CP772, CP773, CP774
1551 * New program sotruss to trace calls through PLTs
1552 Implemented by Ulrich Drepper.
1554 * The malloc hook implementation is marked deprecated and will be removed
1555 from the default implementation in the next version. The design never
1556 worked ever since the introduction of threads. Even programs which do
1557 not create threads themselves can use multiple threads created internally.
1561 * The following bugs are resolved with this release:
1563 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1564 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1565 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1566 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1569 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1571 * POWER7 optimizations: memset, memcmp, strncmp
1573 * New optimized string functions for x86-64: strnlen (SSE2),
1574 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1575 Implemented by Ulrich Drepper.
1579 * The following bugs are resolved with this release:
1581 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1582 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1583 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1584 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1585 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1586 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1587 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1588 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1590 * New interfaces: pthread_getname_np, pthread_setname_np
1592 * New Linux interface: recvmmsg
1594 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1596 * The dynamic linker now recognizes supported ABI versions from the
1597 EI_ABIVERSION field in the ELF header.
1598 Implemented by Ulrich Drepper.
1600 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1601 will not be used to fill in password fields in the passwd.byname replies.
1602 Instead it is used to synthesize the shadow.byname table, should it be
1603 missing. This is a useful mode in some installations involving Solaris.
1604 Implemented by Ulrich Drepper.
1606 * New locales: kok_IN, sq_MK, cv_RU
1610 * The following bugs are resolved with this release:
1612 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1613 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1614 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1615 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1616 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1617 10789, 10817, 10823, 10840, 10847
1619 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1621 Implemented by Ulrich Drepper.
1623 * Checking version of longjmp added that fails if an uninitialized stack
1624 frame would be created. Implemented by Ulrich Drepper.
1626 * STT_GNU_IFUNC is now supported in static executables.
1627 Implemented by H.J. Lu.
1629 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1631 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1632 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1633 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1634 Contributed by H.J. Lu.
1636 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1637 Implemented by Ulrich Drepper.
1639 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1641 Contributed by H.J. Lu.
1643 * Support for fma instruction in AVX on x86-64.
1644 Implemented by H.J. Lu and Ulrich Drepper.
1646 * AVX support in x86-64 auditing support in ld.so.
1647 Implemented by H.J. Lu.
1649 * STB_GNU_UNIQUE support added.
1650 Implemented by Ulrich Drepper.
1652 * Implement second fallback mode for optimized DNS lookup for even more
1653 broken environments. If two requests from the same port are not
1654 handled correctly close the socket and open a new one before sending
1655 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1656 can be used to select this mode right away, instead of rediscovering the
1657 necessity is every process again.
1658 Implemented by Ulrich Drepper.
1660 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1661 Implemented by Adam Tkac.
1663 * Optimized iconv conversions for S390x.
1664 Implemented by Andreas Krebbel.
1666 * Using condvars with PI mutexes is now more efficient due to kernel
1667 support for requeueing to PI futexes. NPTL support added for x86-64.
1668 Implemented by Ulrich Drepper.
1670 * New locales: ps_AF, my_MM
1674 * The following bugs are resolved with this release:
1676 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1677 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1678 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1679 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1680 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1682 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1683 Implemented by Ulrich Drepper.
1685 * New Linux interfaces: accept4, fallocate, fallocate64.
1686 Implemented by Ulrich Drepper.
1688 * Correct declarations of string function when used in C++ code. This
1689 could lead to compile errors for invalid C++ code.
1691 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1694 * New POSIX 2008 interface: psiginfo
1695 Implemented by Ulrich Drepper.
1697 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1698 Implemented by Ulrich Drepper.
1700 * Support for selecting between multiple function definitions at runtime
1701 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1703 * The libcrypt library can now use the hash function implementations in
1704 NSS. Implemented by Ulrich Drepper.
1706 * The malloc implementation can be compiled to be less memory efficient
1707 but higher performing in multi-threaded programs.
1708 Implemented by Ulrich Drepper.
1710 * New locales: nan_TW@latin, ks_IN
1712 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1713 Implemented by Ulrich Drepper.
1715 * Extended printf hook support. It is possible to use user-defined types
1716 and extend existing format specifiers.
1717 Implemented by Ulrich Drepper.
1719 * Handling for group shadow files has been added.
1720 Implemented by Ulrich Drepper.
1722 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1723 servers (the case, e.g., for some people using the built-in DNS
1724 server in ADSL modems/routers). There is a once-per-process timeout
1725 in case of a broken server. To avoid it, users can run nscd or put
1726 'options single-request' in /etc/resolv.conf.
1727 Implemented by Ulrich Drepper.
1731 * The following bugs are resolved with this release:
1733 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1734 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1735 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1736 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1737 6968, 6974, 6980, 6995, 7008, 7009, 7029
1739 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1740 up at the same time. Implemented by Ulrich Drepper.
1742 * TLS descriptors for LD and GD on x86 and x86-64.
1743 Implemented by Alexandre Oliva.
1745 * getaddrinfo now handles DCCP and UDPlite.
1746 Implemented by Ulrich Drepper.
1748 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1749 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1750 Implemented by Ulrich Drepper.
1752 * New implementation of memmem, strstr, and strcasestr which is O(n).
1753 Implemented by Eric Blake.
1755 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1757 * Implement "e" option for popen to open file descriptor with the
1758 close-on-exec flag set. Implemented by Ulrich Drepper.
1760 * Implement "b" mode for fmemopen. In this mode writes writes don't
1761 implicitly add a NUL byte and seeks from the end of the buffer really
1762 use the buffer end, not the string length as the basis.
1763 Implemented by Ulrich Drepper.
1765 * Many functions, exported and internal, now atomically set the close-on-exec
1766 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1768 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1770 Implemented by Pravin Satpute.
1772 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1776 * The following bugs are resolved with this release:
1778 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1779 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1780 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1781 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1782 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1783 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1784 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1786 * New locales: bo_CN, bo_IN, shs_CA.
1788 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1790 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1791 Implemented by Pravin Satpute.
1793 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1795 * nscd caches now all timeouts for DNS entries
1796 Implemented by Ulrich Drepper.
1798 * nscd is more efficient and wakes up less often.
1799 Implemented by Ulrich Drepper.
1801 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1802 vdprintf, and obstack_vprintf.
1803 Implemented by Jakub Jelinek.
1805 * Faster memset for x86-64.
1806 Implemented by Harsha Jagasia and H.J. Lu.
1808 * Faster memcpy on x86.
1809 Implemented by Ulrich Drepper.
1811 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1812 Implemented by Ulrich Drepper.
1814 * Faster sqrt and sqrtf implemention for some PPC variants.
1815 Implemented by Steven Munroe.
1819 * The following bugs are resolved with this release:
1821 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1822 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1823 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1824 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1825 5071, 5103, 5104, 5112, 5113, 5184, 5186
1827 * More checking functions: fread, fread_unlocked, open*, mq_open.
1828 Implemented by Jakub Jelinek and Ulrich Drepper.
1830 * Extend fortification to C++. Implemented by Jakub Jelinek.
1832 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1833 by not recognizing 'a' as a modifier when those specs are requested.
1834 Implemented by Jakub Jelinek.
1836 * PPC optimizations to math and string functions.
1837 Implemented by Steven Munroe.
1839 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1840 options to be passed. Implemented by Ulrich Drepper.
1842 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1844 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1845 Implemented by Ulrich Drepper.
1847 * Handle private futexes in the NPTL implementation.
1848 Implemented by Jakub Jelinek and Ulrich Drepper.
1850 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1851 Implemented by Roland McGrath and Ulrich Drepper.
1853 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1855 * SHA-256 and SHA-512 based password encryption.
1856 Implemented by Ulrich Drepper.
1858 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1859 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1862 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1863 Implemented by Ulrich Drepper.
1867 * The following bugs are resolved with this release:
1869 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1870 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1871 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1872 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1873 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1874 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1875 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1878 * New Linux interfaces: epoll_pwait, sched_getcpu.
1880 * New generic interfaces: strerror_l.
1882 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1886 * The following bugs are resolved with this release:
1888 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1889 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1890 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1891 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1892 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1893 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1894 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1895 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1896 3225, 3251, 3252, 3253, 3273
1898 * For Linux, the sorting of addresses returned by getaddrinfo now also
1899 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1900 Implemented by Ulrich Drepper.
1902 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1903 Implemented by Ulrich Drepper.
1905 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1907 * New iconv module for MIK. Contributed by Alexander Shopov.
1909 * For sites with broken group and/or passwd database, the auto-propagate
1910 option of nscd can prevent creating ID lookup entries from the results
1911 of a name lookup and vice versa. This usually is no problem but some
1912 site might have problems with the default behavior.
1913 Implemented by Ulrich Drepper.
1915 * Iterating over entire database in NIS can be slow. With the
1916 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1917 to trade time for memory. The entire database will be read at once.
1918 Implemented by Ulrich Drepper.
1920 * The interfaces introduced in RFC 3542 have been implemented by
1923 * Support for the new ELF hash table format was added by Ulrich Drepper.
1925 * Support for priority inheritance mutexes added by Jakub Jelinek and
1928 * Support for priority protected mutexes added by Jakub Jelinek.
1930 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1931 or_IN, csb_PL, fy_NL, sr_ME.
1935 * More overflow detection functions.
1937 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1938 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1940 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1941 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1942 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1943 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1944 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1945 by Masahide Washizawa.
1947 * It is now possible to install audit libraries for the dynamic linker using
1948 LD_AUDIT. Implemented by Ulrich Drepper.
1950 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1951 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1952 For a libc and libpthread that works well on Linux 2.4 kernels, we
1953 recommend using the stable 2.3 branch.
1955 * The new function open_wmemstream acts like open_memstream,
1956 but uses a wchar_t wide character buffer.
1958 * The new function ppoll is an improved version of poll, similar to pselect.
1960 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1961 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1962 renameat, unlinkat, linkat, symlinkat, readlinkat.
1964 * New Linux kernel system calls: unshare,
1965 inotify_init, inotify_add_watch, inotify_rm_watch.
1967 * The euidaccess function is now also known by the alias eaccess,
1968 for compatibility with some other systems.
1970 * Timezone data updated to 2006b version.
1974 * The following bugs are resolved with this release:
1976 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1977 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1978 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1979 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1980 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1981 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1983 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1985 * As of this release, GCC 4 can be used to compile the C Library.
1987 * Timezone data updated to 2005m version.
1991 * The following bugs are resolved with this release:
1993 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1994 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1995 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1996 777, 787, 821, 822, 823, 825
1998 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2002 * Support for RFC 3678. Real implementations exist only for Linux so far.
2003 Implemented by Ulrich Drepper.
2005 * nscd can now cache entries persistently. Expiring entries are reloaded.
2006 For speedups the cache can be shared in memory with client processes.
2007 Implemented by Ulrich Drepper.
2009 * nscd can now perform SELinux checks.
2010 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2012 * getaddrinfo queries are now cached. Canonical name lookup is performed
2014 Implemented by Ulrich Drepper.
2016 * The nothrow function attribute is used when headers are used by gcc when
2017 compiling C code. This can avoid significant amounts of exception
2020 * The malloc functions perform more error checking and are stricter when
2021 it comes to reacting on errors. The default action is to terminate
2022 the process after showing an error message. Implemented by Ulrich Drepper.
2024 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2025 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2027 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2028 namespaces using the new function dlmopen(). This feature is of course,
2029 like most other dynamic loading functionality, not available in statically
2030 linked applications. Implemented by Ulrich Drepper.
2032 * Low-overhead boundary checking variants of string and some stdio functions
2033 were added. These are to be used in conjunction with a gcc patch by
2034 Jakub Jelinek which adds calls to these functions if possible.
2035 Implemented by Jakub Jelinek and Ulrich Drepper.
2037 * Old code for several operating systems and machine architectures that
2038 have not been in working condition in a long time have been removed from
2039 the main source tree maintained by the GNU C Library's maintainers.
2040 These files are now reside in the separate `ports' source module
2041 that is usable as an add-on when building the library.
2045 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2046 interrogate the dynamic linker, compatible with the Solaris interface.
2048 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2049 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2051 * getifaddrs now uses the netlink interface on Linux to get its information.
2052 Implemented by Thorsten Kukuk.
2054 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2055 Implemented by Ulrich Drepper.
2057 * support for non-executable stacks on x86 has been added. Changes mostly
2060 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2063 * getaddrinfo now performs destination address selection according to
2068 * Thread-safe interfaces for many functions that access locale data
2069 were added in version 2.3, but these features were omitted from NEWS.
2070 Many functions have variants with an `_l' suffix that take a `locale_t'
2071 object as a parameter rather than consulting the current locale.
2072 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2073 create and maintain `locale_t' objects. Additionally, the new function
2074 `uselocale' sets "the current locale" (as used by functions not so
2075 parameterized) set for an individual thread. These features were added
2076 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2078 * The functions getresuid, getresgid, setresuid, and setresgid, which
2079 have long been available on Linux, are now declared in <unistd.h>
2080 and are now also available on the Hurd.
2082 * ELF thread-local storage support (TLS) now works on x86-64.
2084 * The new dynamic string token $LIB is expanded in shared library names.
2085 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2087 * Aldy Hernandez contributed complete software floating point support for
2088 PowerPC machines with no FPU.
2090 * fexecve is implemented on Linux.
2092 * The `btowc' function should work at least twice as fast due to
2093 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2095 * With approriate thread add-ons cancelable functions are now implemented
2096 in libc.so as well. No need to call the function in libpthread. This
2097 change allowed to finally disable the incorrect and expensive handling
2098 of weak definition in ld.so.
2100 * Yet more PLT entries in libc.so have been removed. We finally arrived
2101 at the bare minimum. Startup times improved appropriately.
2103 * Support for the new Linux/x86 system call interface was added. The
2104 AT_SYSINFO auxiliary vector entry is recognized and handled.
2108 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2111 * iconv (the program and the interface) now accepts empty names (excluding
2112 options like //TRANSLIT) to mean "use charset of current locale".
2114 * localedef can now transliterate characters in strings which are not in
2115 the provided charmap. The information from the input locale is used.
2117 * Prelinking support was added for ELF targets. This requires additional
2118 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2120 * Read-only stdio streams now use mmap to speed up operation by eliminating
2121 copying and buffer underflows. To use add 'm' to the mode string of
2122 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2124 * The malloc functions were completely rewritten by Wolfram Gloger based
2125 on Doug Lea's malloc-2.7.0.c.
2127 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2128 implementation of regex.
2130 * Bruno Haible upgraded the iconv and locale implementation to support
2133 * Contents of the LC_* and LANG environment variables in the CEN style are
2134 not recognized anymore. It never was used. Change by Ulrich Drepper.
2136 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2137 thread-local storage (TLS) ABI on some platforms.
2138 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2140 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2141 EUC-JISX0213, and TSCII.
2143 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2144 BSD-compatible interface for getting all network interface addresses.
2145 Implementation for IPv4 by Roland McGrath.
2147 * Loading of locale data is faster due to the introduction of a locale
2148 archive. Implemented by Roland McGrath and Ulrich Drepper.
2150 * Startup times are significantly reduced by not using exported functions
2151 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2154 * Steven Munroe contributed a port to PowerPC64/Linux.
2158 * The Hurd now uses the GNU libio implementation of stdio rather than the
2159 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2161 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2162 with the same behavior as the Linux system call of the same name.
2166 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2167 128-bit long double format.
2169 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2170 IBM1161, and IBM1162 charsets.
2172 * Andreas Jaeger contributed a port to x86-64/Linux.
2174 * Peter Bruin contributed a port to PowerPC/Hurd.
2176 * libc functions using I/O streams now can handle wide-oriented streams
2179 * optimizations in the dynamic linker. Binaries created by recent binutils
2180 versions start up quicker due to reduced time spent on relocations.
2182 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2186 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2187 asinh, atanh, j0 for the 128-bit long double format.
2189 * Bruno Haible updated all the code handling Unicode in some form to
2190 support Unicode 3.1.
2192 * Speed of regex for single-byte locales is back to previous levels.
2193 Patch by Isamu Hasegawa.
2195 * Alpha, SPARC, and IA-64 now also using floating stacks.
2197 * Startup time of internationalized applications greatly improved through
2198 iconv cache. Use iconvconfig to generate the cache file.
2199 Contributed by Ulrich Drepper.
2201 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2202 severe performance problems. Patch by David Mosberger.
2204 * The Hurd port got a lot more functionality like AIO, various stdio
2205 extensions, etc. Mainly done by Roland McGrath.
2207 * mtrace can now lookup symbols in shared libraries.
2211 * Intel's IA-64 math library is largely integrated. It provides fast and
2212 accurate implementatations for most basic and standard math functions
2213 in float, double, and long double format.
2215 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2216 and asin for the 96-bit long double format and asin, log, tan for the
2217 128-bit long double format.
2219 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2220 The basic double functions exist today. Contributed by Abraham Ziv
2221 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2222 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2224 * An asynchronous name lookup library was added. The interface is designed
2225 after POSIX AIO. The proposal was circulated beforehand to get comments.
2226 No negative ones came in. Implemented by Ulrich Drepper.
2228 * Port to S390/64bit contributed by Martin Schwidefsky
2229 <schwidefsky@de.ibm.com>.
2231 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2232 of functions for Linux/IA-64.
2234 * The RPC code is now thread safe. Threads can now use the same service
2235 of different services at the same time. Patch by Eric Norum
2236 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2238 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2239 family of functions for Linux/S390.
2241 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2242 of functions for Linux/x86.
2244 * Port to Linux/CRIS contributed by Axis Communications.
2248 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2249 we can now check for namespace violations and missing declarations. The
2250 result is that almost all headers are now Unix-compliant (as defined in
2251 the upcoming XPG6). The negative side is that some programs might need
2252 corrections, too, if they depend on the incorrect form of the headers in
2253 previous versions which defined too many symbols and included too many
2256 * regex now handles multibyte character sets correctly.
2257 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2259 * iconv (the program) does now conform to the upcoming XPG6 and handles
2260 charmaps. Instead of the charset names the path of charmaps can be
2261 provided and the conversion happens based on this data.
2262 Contributed by Ulrich Drepper.
2264 * The locale program now provides detailed information about the installed
2269 only lists the names of the supported locales
2273 provides details such as country, language, and codeset name.
2274 Contributed by Ulrich Drepper.
2278 * The gencat program now parses the input file according to the charset
2279 selected by the LC_CTYPE category. This is important for stateful
2280 character sets. To make generating catalogs easier there is a way
2281 to overwrite the charset selected by the locale: before the first
2282 message or $ quote line the catalog can contain a line like
2284 $ codeset=ISO-8859-2
2286 to select the charset (ISO-8859-2 in this case).
2288 Implemented by Shinya Hanataka and Ulrich Drepper.
2290 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2291 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2292 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2294 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2295 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2297 * The LANGUAGE environment variable is now ignored unless the locale is
2298 changed from the default "C" locale.
2300 * The usual bug fixes.
2304 * Greg McGary added runtime support for bounds checking using gcc's
2305 new -fbounded-pointers option. ix86 target is complete. PowerPC
2308 * Thorsten Kukuk added secure mode support to nscd.
2310 * The Berkeley db libraries have been removed.
2312 Related, the nss_db module is now in a separate package since it
2313 obviously requires a database library being available.
2315 * Wide character I/O streams implemented by Ulrich Drepper.
2317 * Functions from the extended socket API added by Ulrich Drepper.
2319 * Functions feenableexcept and fedisableexcept to control the
2320 behaviour of individual exceptions have been added by Andreas Jaeger.
2322 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2324 * The resolver code has been updated from bind 8.2.3-T5B which supports
2325 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2328 This change could in some situations effect backward compatibility. Since
2329 now `_res' is a thread-local instead of a global variable, modifying it
2330 in one thread does not have any effect in other threads.
2332 The resolver library was also extended to allow IPv6 as the transport
2333 protocol for the requests. This work was done by Stig Venaas.
2335 * Compatibility code for K&R C compilers has been removed from the
2336 header files. A ISO C compiler is needed to use the library
2337 (conforming to either C89 or C99 standard).
2339 * Complete rewrite of the localedef program to support multibyte character
2340 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2341 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2342 Implemented by Ulrich Drepper.
2344 Bruno Haible significantly improved the generation and use of the data
2345 structures for the wide character tables.
2347 * Plural handling in gettext implemented by Ulrich Drepper.
2349 * The utmp daemon has been removed.
2351 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2353 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2356 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2358 * POSIX barriers implemented by Kaz Kylheku.
2360 * POSIX spawn function family implemented by Ulrich Drepper.
2362 * POSIX spinlocks are now available.
2364 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2366 * the configure option --enable-kernel=X.Y.Z allows to strip out
2367 compatibility for kernel versions before X.Y.Z. This is currently only
2368 implemented for Linux.
2370 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2371 field sin6_scope_id. This means that all programs using IPv6 should be
2372 recompiled. Don't expect binary compatibility with previous glibc
2375 * various conversion modules for IBM character sets contributed by
2378 * IA-64 port by Jes Sorensen and HJ Lu.
2392 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2394 * New xdr functions are added; some rpc functions are now 64bit clean.
2396 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2398 * Fixed known incompatibilities with glibc 2.0.
2400 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2402 * Optimized a number of functions (especially the ELF dynamic loader).
2404 * Update timezone data files.
2406 * lots of charmaps corrections
2408 * some new locale definitions and charmaps
2413 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2414 conform to POSIX member type requirements. Symbol versions have been
2415 adjusted as needed within the library, and for direct use by applications,
2416 but there is potential for problems if third-party libraries use
2417 struct timeval as part of their interface. This does not present
2418 a problem for X and other "essential" system libraries.
2420 * An additional locale model to support C++ Standard Library locale
2421 model and probably more was implemented by Ulrich Drepper.
2423 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2426 * Miles Bader provided the `argp' function family to support hierachical
2427 command line argument parsing, layered on top of getopt.
2429 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2431 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2434 * scanf recognizes the %a and %A format for scanning floating point numbers.
2436 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2437 information and interfaces for the available integer types.
2439 * about 130 new math functions were added to implement the ISO C9x math
2442 * the new header <complex.h> contains definitions of the complex math
2443 functions from ISO C 9X.
2445 * the new header <tgmath.h> defines generic macros to use complex or
2446 real valued functions.
2448 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2450 * Andreas Jaeger provided a test suite for the math library.
2452 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2454 * Ulrich Drepper added character set conversion functions (iconv).
2456 * Optimized string functions have been added.
2458 * The localedata addon is now part of glibc.
2460 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2462 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2463 daemon for NSS (nscd).
2465 Missing a better place here are some numbers on improvements. Under
2466 Linux 2.1.125 un-tar-ing the kernel sources takes
2470 using local files 12.19s 6.88s 22.91s
2472 using NIS 13.92s 8.91s 26.34s
2474 using NIS & nscd 10.37s 7.34s 25.30s
2476 using NIS+ 27.57s 30.37s 640.46s
2478 using NIS+ & nscd 10.25s 7.83s 26.51s
2480 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2482 Keep in mind that non-namelookup related operations dominate above times.
2483 It was just a common complain that using NIS+ unpacking the kernel is
2486 [1] The old nscd implementation is not available anymore since it was
2487 distributed with glibc up to version 2.0.98 and thus is now replaced.
2489 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2491 * Mark Kettenis provided a Hesiod NSS module.
2493 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2494 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2496 * rcmd can now handle netgroups (Dick Streefland).
2498 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2501 * Support for the IPv6 protocol has been added to the socket API, as per the
2502 latest draft standards.
2504 * Support for Linux 2.2 has been added.
2506 * Interface changes relative to the latest 2.0.x release:
2507 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2508 addseverity NEW: Unix98
2509 alphasort64 NEW: LFS
2510 argp_err_exit_status NEW: argp, GNU ext
2511 argp_error NEW: argp, GNU ext
2512 argp_failure NEW: argp, GNU ext
2513 argp_help NEW: argp, GNU ext
2514 argp_parse NEW: argp, GNU ext
2515 argp_program_bug_address NEW: argp, GNU ext
2516 argp_program_version NEW: argp, GNU ext
2517 argp_program_version_hook NEW: argp, GNU ext
2518 argp_state_help NEW: argp, GNU ext
2519 argp_usage NEW: argp, GNU ext
2520 authdes_create NEW: Secure RPC
2521 authdes_getucred NEW: Secure RPC
2522 authdes_pk_create NEW: Secure RPC
2523 backtrace NEW: GNU ext.
2524 backtrace_symbols NEW: GNU ext.
2525 backtrace_symbols_fd NEW: GNU ext.
2527 cacosf NEW: ISO C 9x
2528 cacosh NEW: ISO C 9x
2529 cacoshf NEW: ISO C 9x
2530 cacoshl NEW: ISO C 9x
2531 cacosl NEW: ISO C 9x
2538 casinf NEW: ISO C 9x
2539 casinh NEW: ISO C 9x
2540 casinhf NEW: ISO C 9x
2541 casinhl NEW: ISO C 9x
2542 casinl NEW: ISO C 9x
2544 catanf NEW: ISO C 9x
2545 catanh NEW: ISO C 9x
2546 catanhf NEW: ISO C 9x
2547 catanhl NEW: ISO C 9x
2548 catanl NEW: ISO C 9x
2549 cbc_crypt NEW: Secure RPC
2553 ccoshf NEW: ISO C 9x
2554 ccoshl NEW: ISO C 9x
2560 cimagf NEW: ISO C 9x
2561 cimagl NEW: ISO C 9x
2562 clearerr_locked REMOVED
2563 clntunix_create NEW: sunrpc ext
2565 clog10 NEW: ISO C 9x
2566 clog10f NEW: ISO C 9x
2567 clog10l NEW: ISO C 9x
2577 cprojf NEW: ISO C 9x
2578 cprojl NEW: ISO C 9x
2580 crealf NEW: ISO C 9x
2581 creall NEW: ISO C 9x
2586 csinhf NEW: ISO C 9x
2587 csinhl NEW: ISO C 9x
2590 csqrtf NEW: ISO C 9x
2591 csqrtl NEW: ISO C 9x
2595 ctanhf NEW: ISO C 9x
2596 ctanhl NEW: ISO C 9x
2598 des_setparity NEW: Secure RPC
2599 ecb_crypt NEW: Secure RPC
2600 endutxent NEW: Unix98
2602 exp10f NEW: ISO C 9x
2603 exp10l NEW: ISO C 9x
2607 fattach NEW: STREAMS
2608 fdetach NEW: STREAMS
2612 feclearexcept NEW: ISO C 9x
2613 fegetenv NEW: ISO C 9x
2614 fegetexceptflag NEW: ISO C 9x
2615 fegetround NEW: ISO C 9x
2616 feholdexcept NEW: ISO C 9x
2618 feraiseexcept NEW: ISO C 9x
2619 ferror_locked REMOVED
2620 fesetenv NEW: ISO C 9x
2621 fesetexceptflag NEW: ISO C 9x
2622 fesetround NEW: ISO C 9x
2623 fetestexcept NEW: ISO C 9x
2624 feupdateenv NEW: ISO C 9x
2625 fflush_locked REMOVED
2629 fgets_unlocked NEW: GNU ext.
2630 fileno_locked REMOVED
2642 fputc_locked REMOVED
2643 fputs_unlocked NEW: GNU ext.
2644 fread_unlocked NEW: GNU ext.
2649 fstatvfs NEW: Unix98
2653 ftruncate64 NEW: LFS
2655 fwrite_unlocked NEW: GNU ext.
2656 gai_strerror NEW: IPv6
2660 getchar_locked REMOVED
2662 getdate_err NEW: Unix98
2663 getdate_r NEW: GNU ext.
2665 getnameinfo NEW: IPv6
2666 getnetname NEW: Secure RPC
2667 getpmsg NEW: STREAMS
2668 getpt NEW: Unix98 PTY
2669 getrlimit64 NEW: LFS
2670 getutxent NEW: Unix98
2671 getutxid NEW: Unix98
2672 getutxline NEW: Unix98
2673 glob64 NEW: GNU ext.
2674 globfree64 NEW: GNU ext.
2675 gnu_get_libc_release NEW: GNU ext.
2676 gnu_get_libc_version NEW: GNU ext.
2677 grantpt NEW: Unix98 PTY
2678 host2netname NEW: Secure RPC
2680 iconv_close NEW: iconv
2681 iconv_open NEW: iconv
2682 if_freenameindex NEW: IPv6
2683 if_indextoname NEW: IPv6
2684 if_nameindex NEW: IPv6
2685 if_nametoindex NEW: IPv6
2686 in6addr_any NEW: IPv6
2687 in6addr_loopback NEW: IPv6
2688 inet6_isipv4mapped NEW: IPv6
2689 isastream NEW: STREAMS
2690 iswblank NEW: GNU ext.
2691 key_decryptsession NEW: Secure RPC
2692 key_decryptsession_pk NEW: Secure RPC
2693 key_encryptsession NEW: Secure RPC
2694 key_encryptsession_pk NEW: Secure RPC
2695 key_gendes NEW: Secure RPC
2696 key_get_conv NEW: Secure RPC
2697 key_secretkey_is_set NEW: Secure RPC
2698 key_setnet NEW: Secure RPC
2699 key_setsecret NEW: Secure RPC
2700 llrint NEW: ISO C 9x
2701 llrintf NEW: ISO C 9x
2702 llrintl NEW: ISO C 9x
2703 llround NEW: ISO C 9x
2704 llroundf NEW: ISO C 9x
2705 llroundl NEW: ISO C 9x
2710 lrintf NEW: ISO C 9x
2711 lrintl NEW: ISO C 9x
2712 lround NEW: ISO C 9x
2713 lroundf NEW: ISO C 9x
2714 lroundl NEW: ISO C 9x
2716 makecontext NEW: Unix98
2717 mempcpy NEW: GNU ext.
2720 modify_ldt NEW: kernel
2724 nearbyint NEW: ISO C 9x
2725 nearbyintf NEW: ISO C 9x
2726 nearbyintl NEW: ISO C 9x
2727 netname2host NEW: Secure RPC
2728 netname2user NEW: Secure RPC
2729 nexttoward NEW: ISO C 9x
2730 nexttowardf NEW: ISO C 9x
2731 nexttowardl NEW: ISO C 9x
2735 passwd2des NEW: Secure RPC
2737 pow10f NEW: GNU ext.
2738 pow10l NEW: GNU ext.
2741 printf_size NEW: GNU ext.
2742 printf_size_info NEW: GNU ext.
2743 profil_counter REMOVED
2744 pthread_mutexattr_getkind_np REPLACED
2745 pthread_mutexattr_setkind_np REPLACED
2746 ptsname NEW: Unix98 PTY
2747 ptsname_r NEW: Unix98 PTY
2749 putchar_locked REMOVED
2750 putgrent NEW: GNU ext.
2752 putpmsg NEW: STREAMS
2753 pututxline NEW: Unix98
2757 readdir64_r NEW: LFS
2758 remquo NEW: ISO C 9x
2759 remquof NEW: ISO C 9x
2760 remquol NEW: ISO C 9x
2762 roundf NEW: ISO C 9x
2763 roundl NEW: ISO C 9x
2765 scalbln NEW: ISO C 9x
2766 scalblnf NEW: ISO C 9x
2767 scalblnl NEW: ISO C 9x
2769 sendfile NEW: kernel
2770 setcontext NEW: Unix98
2771 setrlimit64 NEW: LFS
2772 setutxent NEW: Unix98
2774 sigignore NEW: Unix98
2775 sigqueue NEW: POSIX.1b
2776 sigrelse NEW: Unix98
2777 sigset NEW: POSIX.1b
2778 sigtimedwait NEW: POSIX.1b
2779 sigwaitinfo NEW: POSIX.1b
2780 sincos NEW: GNU ext.
2781 sincosf NEW: GNU ext.
2782 sincosl NEW: GNU ext.
2786 strcasestr NEW: GNU ext.
2787 strtoimax NEW: ISO C 9x
2788 strtoumax NEW: ISO C 9x
2789 strverscmp NEW: GNU ext.
2790 svcauthdes_stats NEW: Secure RPC
2791 svcunix_create NEW: sunrpc etx
2792 svcunixfd_create NEW: sunrpc ext
2793 swapcontext NEW: Unix98
2794 tcgetsid NEW: Unix98 PTY
2795 tdestroy NEW: GNU ext.
2796 tgamma NEW: ISO C 9x
2797 tgammaf NEW: ISO C 9x
2798 tgammal NEW: ISO C 9x
2802 truncf NEW: ISO C 9x
2803 truncl NEW: ISO C 9x
2805 unlockpt NEW: Unix98 PTY
2806 updwtmpx NEW: Unix98
2807 user2netname NEW: Secure RPC
2808 utmpxname NEW: Unix98
2809 versionsort NEW: GNU ext.
2810 versionsort64 NEW: GNU ext.
2812 wcscasecmp NEW: GNU ext.
2813 wcsncasecmp NEW: GNU ext.
2814 wcsnlen NEW: GNU ext.
2815 wcstoimax NEW: ISO C 9x
2816 wcstoll NEW: ISO C 9x
2817 wcstoull NEW: ISO C 9x
2818 wcstoumax NEW: ISO C 9x
2820 wordexp NEW: POSIX.2
2821 wordfree NEW: POSIX.2
2822 write_profiling REMOVED
2823 xdecrypt NEW: Secure RPC
2824 xdr_authdes_cred NEW: Secure RPC
2825 xdr_authdes_verf NEW: Secure RPC
2826 xdr_cryptkeyarg NEW: Secure RPC
2827 xdr_cryptkeyarg2 NEW: Secure RPC
2828 xdr_cryptkeyres NEW: Secure RPC
2829 xdr_getcredres NEW: Secure RPC
2830 xdr_key_netstarg NEW: Secure RPC
2831 xdr_key_netstres NEW: Secure RPC
2832 xdr_keybuf NEW: Secure RPC
2833 xdr_keystatus NEW: Secure RPC
2834 xdr_netnamestr NEW: Secure RPC
2835 xdr_sizeof NEW: Secure RPC
2836 xdr_unixcred NEW: sunrpc ext
2837 xencrypt NEW: Secure RPC
2838 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2849 * inet_ntoa is thread-safe
2851 * updwtmp is moved from libutil to libc
2853 * rewrite of cbrt function
2855 * update of timezone data
2869 * add atoll function
2871 * fix complex problems in Berkeley DB code
2873 * fix math functions
2877 * fixed lots of header problems (especially Linux/GNU specific)
2879 * dynamic loader preserves all registers
2881 * Roland McGrath provided support for handling of auxiliary objects in
2882 the ELF dynamic loader.
2884 * support for parallel builds is improved
2888 * GNU extensions are no longer declared by default. To enable them you
2889 must define the macro `_GNU_SOURCE' in your program or compile with
2892 * The library has changed from using GNU ld symbol aliases to using weak
2893 symbols where available. The ELF object file format supports weak
2894 symbols; GNU ld also supports weak symbols in the a.out format. (There
2895 is also now support for other GNU ld extensions in ELF. Use the
2896 `--with-elf' option to configure to indicate you have ELF, and
2897 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2898 of many files which contained only symbol aliases, reducing the size of
2899 the source and the compiled library; many other files were renamed to
2900 less cryptic names previously occupied by the symbol alias files.
2901 There is a new header file <elf.h> for programs which operate on
2902 files in the ELF format.
2904 * Converted to Autoconf version 2, so `configure' has more options.
2905 Run `configure --help' to see the details.
2907 * The library can now be configured to build profiling, highly-optimized
2908 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2909 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2910 `configure' enable building these extra libraries. The shared library is
2911 built by default when using both ELF and GNU ld. When shared libraries
2912 are enabled, the new library `-ldl' is available for arbitrary run-time
2913 loading of shared objects; its interface is defined in <dlfcn.h>. The
2914 new header file <link.h> gives access to the internals of the run-time
2915 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2916 application of same name on other systems and it provides information
2917 about dynamically linked binaries.
2919 * The C library now provides the run-time support code for profiling
2920 executables compiled with `-pg'. Programs can control the profiling code
2921 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2922 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2923 the support for this file format was contributed by David Mosberger-Tang.
2925 * The math code has been replaced with a math library based on fdlibm from
2926 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2927 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2928 functions. The math functions now reside in a separate library, so
2929 programs using them will need to use `-lm' their linking commands.
2931 * John C. Bowman contributed optimized ix87 assembler inline functions.
2933 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2934 mechanism similar to that found in Solaris 2. This is now used for the
2935 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2936 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2937 file controls what services are used for each individual database. This
2938 works by loading shared libraries with names specified in `nsswitch.conf',
2939 so service modules can be changed or added at any time without even
2940 relinking any program. Currently there are the file, db, and NIS based
2941 NSS services available.
2943 * The new functions `strtoq' and `strtouq' parse integer values from
2944 strings, like `strtol' and `strtoul', but they return `long long int' and
2945 `unsigned long long int' values, respectively (64-bit quantities).
2947 * The new functions `strtof' and `strtold' parse floating-point values from
2948 strings, like `strtod', but they return `float' and `long double' values,
2949 respectively (on some machines `double' and `long double' are the same).
2951 * Ulrich Drepper has contributed new implementations of the floating-point
2952 printing and reading code used in the `printf' family of functions and
2953 `strtod', `strtof', and `strtold'. These new functions are perfectly
2954 accurate, and much faster than the old ones.
2956 * The implementation of the POSIX locale model was completely rewritten by
2957 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2958 to compile the POSIX locale definition.
2960 * The former dummy implementations of the strcoll and strxfrm function are
2961 now replaced by fully functional code contributed by Ulrich Drepper. The
2962 collation information comes from the POSIX locale definitions.
2964 * The new header <langinfo.h> defines an interface for accessing
2965 various locale-dependent data (using the locale chosen with `setlocale').
2967 * Ulrich Drepper has contributed a new suite of functions for operation on
2968 wide-character and multibyte-character strings, in <wchar.h>;
2969 and classification and case conversion of wide characters, in <wctype.h>.
2970 These new functions are conforming to the ISO C, Amendement 1 specification.
2972 * There is now a second implementation of the standard I/O library available.
2973 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2974 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2976 * You can now use positional parameter specifications in format strings
2977 for the `printf' and `scanf' families of functions. For example,
2978 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2979 ``Number 6, Mr Jones''. This is mainly useful when providing different
2980 format strings for different languages, whose grammars may dictate
2981 different orderings of the values being printed. To support this
2982 feature, the interface for `register_printf_handler' has changed; see
2983 the header file <printf.h> for details.
2985 * The `printf' and `scanf' families of functions now understand a new
2986 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2987 to group numbers as indicated by the locale; for `scanf' and friends, this
2988 says to accept as valid only a number with all the proper grouping
2989 separators in the right places. In the default "C" locale, numbers are
2990 not grouped; but locales for specific countries will define the usual
2991 conventions (i.e. separate thousands with `,' in the US locale).
2993 * The pgrp functions have been regularized, slightly incompatibly but much
2994 less confusingly. The core functions are now `getpgid' and `setpgid',
2995 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2996 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2997 provided for compatibility. There is no longer an incompatible `getpgrp'
2998 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3000 * The new header file <fts.h> and suite of functions simplify programs that
3001 operate on directory trees. This code comes from 4.4 BSD.
3003 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3004 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3005 NSS scheme used in glibc.
3007 * There is a new malloc debugging hook `__memalign_hook'.
3009 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3010 `unsigned int' in <sys/types.h>. These are for compatibility only and
3011 their use is discouraged.
3013 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3014 done differently, so that it works even without GNU ld.
3016 * New function `euidaccess' checks allowed access to a file like `access',
3017 but using the effective IDs instead of the real IDs.
3019 * The time zone data files have been updated for the latest and greatest
3020 local time conventions of the countries of the world.
3022 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3025 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3026 for formatting floating-point numbers. They are provided only for
3027 compatibility; new programs should use `sprintf' instead. There are
3028 also equivalent function for the `long double' floating-point type and
3029 all functions also exist in a reentrant form.
3031 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3032 functions for maintaining the login-record files (primarily of use to
3033 system programs such as `login'), and convenient functions for
3034 allocating and initializing a pseudo-terminal (pty) device.
3036 * Ulrich Drepper has contributed new support for System V style
3037 shared memory and IPC on systems that support it.
3039 * Ulrich Drepper has contributed several miscellaneous new functions found
3040 in System V: The `hsearch' family of functions provide an effective
3041 implementation of hash tables; `a64l' and `l64a' provide a very simple
3042 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3045 * Ulrich Drepper has contributed new reentrant counterparts for the
3046 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3048 * Ulrich Drepper has contributed new, highly-optimized versions of several
3049 string functions for the i486/Pentium family of processors.
3051 * Ulrich Drepper has updated the Linux-specific code, based largely
3052 on work done in Hongjiu Lu's version of GNU libc for Linux.
3053 The GNU library now supports Linux versions 2.0.10 and later,
3054 using the ELF object file format (i[3456]86-*-linux).
3056 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3058 * David Mosberger-Tang and Richard Henderson have ported the C library
3059 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3060 dynamic linking support for ELF/Alpha.
3062 * Richard Henderson contributed several Alpha optimized assembler function
3063 for arithmetic and string handling.
3065 * Ulrich Drepper has contributed a new set of message catalog functions to
3066 support multiple languages using the <libintl.h> interface, for use with
3067 his new package GNU gettext. Translation volunteers have contributed
3068 catalogs of the library's messages in Spanish, German, and Korean.
3070 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3071 program and the `catgets' function for reading the catalog files it
3072 creates. (The <libintl.h> interface is preferred; we include the
3073 <nl_types.h> interface using `catgets' only for source compatibility with
3074 programs already written to use it.)
3076 * New header file <values.h> gives SVID-compatible names for <limits.h>
3079 * Various new macros, declarations, and small header files for compatibility
3082 * New function `group_member' is a convenient way to check if a process has
3083 a given effective group ID.
3085 * When using GCC 2.7 and later, the socket functions are now declared in a
3086 special way so that passing an argument of type `struct sockaddr_in *',
3087 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3088 `struct sockaddr *' type, does not generate a type-clash warning.
3090 * New function `error' declared in header file <error.h> is a convenient
3091 function for printing error messages and optionally exiting; this is the
3092 canonical function used in GNU programs. The new functions `err', `warn',
3093 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3094 doing the same thing.
3096 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3097 POSIX.2 `glob' function to do ~ and {...} expansion.
3099 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3100 `clearenv' which is used in POSIX.9 is also available.
3102 * New function `getsid' returns session ID number on systems that support it.
3104 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3105 files <db.h> and <mpool.h> provide a rich set of functions for several
3106 types of simple databases stored in memory and in files, and <ndbm.h> is
3107 an old `ndbm'-compatible interface using the `db' functions. Link with
3108 `-ldb' to get these functions.
3110 * New macro `strdupa' copies a string like `strdup', but uses local stack
3111 space from `alloca' instead of dynamic heap space from `malloc'.
3113 * New function `strnlen' is like `strlen' but searches only a given maximum
3114 number of characters for the null terminator. `stpncpy', `strndup' and
3115 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3118 * New function `statfs' in header <sys/statfs.h>.
3120 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3121 provide convenient functions for operating on blocks of null-terminated
3124 * A new suite of functions in <utmp.h> handle all the details of reading
3125 and writing the utmp file.
3127 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3130 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3131 completely POSIX compliant and also implemented the extended functionality
3132 to handle alternate digit representation and alternate era date formats.
3134 * Ulrich Drepper provided an implementation of the `strptime' function
3135 defined in XPG4.2 which transforms a string into a `struct tm' value.
3137 * Paul Eggert provided the tzselect shell script as part of the timezone
3138 code. The shell script makes it easy to select the correct timezone
3141 * The implementation of the malloc family of functions is completely replaced
3142 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3143 The implementation uses the mmap function (if available) and it is
3144 optimized for the use in multi threaded programs.
3146 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3147 functions. This new functionality is usable by specifying a special
3148 salt string and it is compatible with implementation on *BSD systems.
3150 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3151 `getsubopt' to handle second level command line options, `bsd_signal'
3152 to access BSD style `signal' functionality, the obsolete `regexp' style
3155 * the `lchown' function is available on system which support this
3158 * The implementation of the shadow password handling function was contributed
3161 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3163 * POSIX.1g support was added. The <sys/select.h> header is available,
3164 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3165 implementation of `getaddrinfo'.
3169 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3171 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3172 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3174 * The new function `daemon' from 4.4 BSD is useful for server programs that
3175 want to put themselves in the background.
3177 * Joel Sherrill has contributed support for several standalone boards that
3178 run without an operating system.
3180 * `printf', `scanf' and friends now accept a `q' type modifier for long
3181 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3183 * All of the code taken from BSD (notably most of the math and networking
3184 routines) has been updated from the BSD 4.4-Lite release.
3186 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3188 * The new functions `getdomainname' and `setdomainname' fetch or change the
3189 YP/NIS domain name. These are system calls which exist on systems which
3192 * The time zone data files have been updated for the latest international
3195 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3196 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3200 * The C library now includes support for Sun RPC, from Sun's free
3201 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3202 are included. (There is still no support for YP.)
3204 * Tom Quinn has contributed a port of the C library to SGI machines running
3205 Irix 4 (mips-sgi-irix4).
3207 * The new `lockf' function is a simplified interface to the locking
3208 facilities of `fcntl', included for compatibility.
3210 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3212 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3214 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3217 * The error message printed by `assert' for a failed assertion now includes
3218 the name of the program (if using GNU ld) and the name of the calling
3219 function (with versions of GCC that support this).
3221 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3223 * The library now includes the <sys/mman.h> header file and memory
3224 management functions `mmap', `munmap', `mprotect', `msync', and
3225 `madvise', on systems that support those facilities.
3227 * The interface for `mcheck' has changed slightly: the function called to
3228 abort the program when an allocation inconsistency is detected now takes
3229 an argument that indicates the type of failure. The new function
3230 `mprobe' lets you request a consistency check for a particular block at
3231 any time (checks are normally done only when you call `free' or `realloc'
3234 * It is now possible to easily cross-compile the C library, building on one
3235 system a library to run on another machine and/or operating system. All
3236 you need to do is set the variable `HOST_CC' in `configparms' to the
3237 native compiler for programs to run on the machine you are building on (a
3238 few generator programs are used on Unix systems); set `CC' to the
3241 * The new function `fexecve' (only implemented on the GNU system) executes
3242 a program file given a file descriptor already open on the file.
3246 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3247 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3249 * You can set the variable `libprefix' in `configparms' to specify a prefix
3250 to be prepended to installed library files; this makes it easy to install
3251 the GNU C library to be linked as `-lgnuc' or whatever.
3253 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3254 copies a limited number of characters from a string, and returns the
3255 address of the last character written.
3257 * You no longer need to check for whether the installed `stddef.h' is
3258 compatible with the GNU C library. configure now checks for you.
3260 * You can now define a per-stream `fileno' function to convert the
3261 stream's cookie into an integral file descriptor.
3263 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3264 allocates zero bytes of storage, and returns a unique pointer which
3265 you can pass to `realloc' or `free'. The behavior is undefined if
3266 you dereference this pointer.
3268 * The C library now runs on Sony NEWS m68k machines running either
3269 NewsOS 3 or NewsOS 4.
3271 * The new `syscall' function is a system-dependent primitive function
3272 for invoking system calls. It has the canonical behavior on Unix
3273 systems, including unreliable return values for some calls (such as
3274 `pipe', `fork' and `getppid').
3276 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3277 to `EAGAIN', which is the preferred name. On systems whose kernels
3278 use two distinct codes, the C library now translates EWOULDBLOCK to
3279 EAGAIN in every system call function.
3283 * The GNU C Library Reference Manual is now distributed with the library.
3284 `make dvi' will produce a DVI file of the printed manual.
3285 `make info' will produce Info files that you can read on line using C-h i
3286 in Emacs or the `info' program.
3287 Please send comments on the manual to bug-glibc-manual@gnu.org.
3289 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3291 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3293 * Jason Merrill has contributed a port to the Sequent Symmetry running
3294 Dynix version 3 (i386-sequent-dynix).
3296 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3297 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3299 * New function `memory_warnings' lets you arrange to get warnings when
3300 malloc is running out of memory to allocate, like Emacs gives you.
3302 * The C library now contains the relocating allocator used in Emacs 19 for
3303 its editing buffers. This allocator (ralloc) minimizes allocation
3304 overhead and fragmentation by moving allocated regions around whenever it
3305 needs to. You always refer to a ralloc'd region with a "handle" (a
3306 pointer to a pointer--an object of type `void **').
3308 * There is a new `printf' format: `%m' gives you the string corresponding
3309 to the error code in `errno'.
3311 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3312 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3313 pass, the `a' modifier says to fill in a `char **' you pass with a
3316 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3317 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3318 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3320 * `mkstemp' is a traditional Unix function to atomically create and open a
3321 uniquely-named temporary file.
3325 * The standard location for the file that says what the local timezone is
3326 has changed again. It is now `/usr/local/etc/localtime' (or more
3327 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3329 * The distribution no longer contains any files with names longer than 14
3332 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3333 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3335 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3339 * The configuration process has changed quite a bit. The `configure'
3340 script is now used just like the configuration scripts for other GNU
3341 packages. The `sysdeps' directory hierarchy is much rearranged.
3342 The file `INSTALL' explains the new scheme in detail.
3344 * The header files no longer need to be processed into ANSI C and
3345 traditional C versions. There is just one set of files to install, and
3346 it will work with ANSI or old C compilers (including `gcc -traditional').
3348 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3349 MIPS DECStation running Ultrix 4.
3351 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3352 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3353 made itself into a shared library.
3355 * Yet further improved support for the i386, running 4.3 BSD-like systems
3356 (such as Mach 3 with the Unix single-server), or System V.
3358 * New function `strncasecmp' to do case-insensitive string comparison
3359 with limited length.
3361 * New function `strsep' is a reentrant alternative to `strtok'.
3363 * New functions `scandir' and `alphasort' for searching directories.
3365 * New function `setenv' is a better interface to `putenv'.
3367 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3368 function for traversing a directory tree.
3370 * The GNU obstack package is now also part of the C library.
3371 The new function `open_obstack_stream' creates a stdio stream that
3372 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3373 formatted output directly to an obstack.
3375 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3376 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3378 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3380 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3381 things to your strings.
3383 * There are some new test programs: test-fseek, testmb, and testrand.
3385 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3386 These ports are not finished, but are a good starting place for really
3387 supporting those systems.
3389 * `/etc/localtime' is now the standard location for the file that says what
3390 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3391 This follows the general principle that `/etc' is the place for all local
3392 configuration files.
3394 * The C library header files now use `extern "C"' when used by the C++
3395 compiler, so the C library should now work with C++ code.
3397 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3398 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3401 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3402 function which uses the `merge sort' algorithm, and is said to be
3403 significantly faster than the old GNU `qsort' function. Merge sort is
3404 now the standard `qsort' function. The new algorithm can require a lot
3405 of temporary storage; so, the old sorting function is called when the
3406 required storage is not available.
3408 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3409 provides the Unix `crypt' function, plus some other entry points.
3411 * The code and header files taken from 4.4 BSD have been updated with the
3412 latest files released from Berkeley.
3414 ----------------------------------------------------------------------
3415 Copyright information:
3417 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3419 Permission is granted to anyone to make or distribute verbatim copies
3420 of this document as received, in any medium, provided that the
3421 copyright notice and this permission notice are preserved,
3422 thus giving the recipient permission to redistribute in turn.
3424 Permission is granted to distribute modified versions
3425 of this document, or of portions of it,
3426 under the above conditions, provided also that they
3427 carry prominent notices stating who last changed them.
3430 version-control: never