1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
11 24731-2:2010, is supported to enable declarations of functions from that
12 TR. Note that not all functions from that TR are supported by the GNU C
15 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
16 18661-1:2014, is supported to enable declarations of functions and macros
17 from that TS. Note that most features from that TS are not supported by
20 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
21 18661-4:2015, is supported to enable declarations of functions and macros
22 from that TS. Note that most features from that TS are not supported by
25 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
26 means that in a future release, the macros “major”, “minor”, and “makedev”
27 will only be available from <sys/sysmacros.h>.
29 These macros are not part of POSIX nor XSI, and their names frequently
30 collide with user code; see for instance glibc bug 19239 and Red Hat bug
31 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
32 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
35 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
36 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions,
37 the femode_t type and the FE_DFL_MODE macro.
39 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
40 for the Linux quota interface which predates kernel version 2.4.22 has
43 Security related changes:
45 On ARM EABI (32-bit), generating a backtrace for execution contexts which
46 have been created with makecontext could fail to terminate due to a
47 missing .cantunwind annotation. This has been observed to lead to a hang
48 (denial of service) in some Go applications compiled with gccgo. Reported
49 by Andreas Schwab. (CVE-2016-6323)
51 The following bugs are resolved with this release:
53 [The release manager will add the list generated by
54 scripts/list-fixed-bugs.py just before the release.]
58 * The minimum Linux kernel version that this version of the GNU C Library
59 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
60 kernel version 2.6.32 or later suffices (on architectures that already
61 required kernel versions more recent than 3.2, those requirements remain
62 unchanged). Linux 3.2 or later kernel headers are required on all
65 * The pap_AN locale has been deleted. This has been deprecated for a long
66 time. It has been replaced by pap_AW & pap_CW, both of which have long
67 been included in previous releases.
69 * The readdir_r and readdir64_r functions have been deprecated. It is
70 recommended to use readdir and readdir64 instead.
72 * The type “union wait” has been removed. It was deprecated in the early
73 1990s and never part of POSIX. Application code should use the int type
74 instead of “union wait”.
76 * A new NSS action is added to facilitate large distributed system
77 administration. The action, MERGE, allows remote user stores like LDAP
78 to be merged into local user stores like /etc/groups in order to provide
79 easy to use, updated, and managed sets of merged credentials. The new
80 action can be used by configuring it in /etc/nsswitch.conf:
81 group: files [SUCCESS=merge] nis
82 Implemented by Stephen Gallagher (Red Hat).
84 * The deprecated __malloc_initialize_hook variable has been removed from the
87 * The long unused localedef --old-style option has been removed. It hasn't
88 done anything in over 16 years. Scripts using this option can safely
91 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
92 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
93 return the next representable value in the direction of positive infinity
94 and the nextdown functions return the next representable value in the
95 direction of negative infinity. These are currently enabled as GNU
98 Security related changes:
100 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
101 could result in a stack overflow when getnetbyname was called with an
102 overly long name. (CVE-2016-3075)
104 * Previously, getaddrinfo copied large amounts of address data to the stack,
105 even after the fix for CVE-2013-4458 has been applied, potentially
106 resulting in a stack overflow. getaddrinfo now uses a heap allocation
107 instead. Reported by Michael Petlan. (CVE-2016-3706)
109 * The glob function suffered from a stack-based buffer overflow when it was
110 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
111 Reported by Alexander Cherepanov. (CVE-2016-1234)
113 * The Sun RPC UDP client could exhaust all available stack space when
114 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
115 alloca plugin for GCC. (CVE-2016-4429)
117 * The IPv6 name server management code in libresolv could result in a memory
118 leak for each thread which is created, performs a failing naming lookup,
119 and exits. Over time, this could result in a denial of service due to
120 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
122 The following bugs are resolved with this release:
124 [1170] localedata: ne_NP: update Nepali locale definition file
125 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
127 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
128 [6796] math: fdim() does not set errno on overflow
129 [10354] libc: posix_spawn should use vfork() in more cases than presently
130 [11213] localedata: localedata: add copyright disclaimer to locale files
131 [12143] localedata: chr_US: new Cherokee locale
132 [12450] localedata: sgs_LT: new locale
133 [12676] localedata: ln_CD: new locale
134 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
136 [13304] math: fma, fmaf, fmal produce wrong results
137 [14259] build: --localedir arg to configure is ignored
138 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
139 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
140 [14934] localedata: es_CL: wrong first weekday chilean locale
141 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
143 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
145 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
146 [15368] nptl: raise() is not async-signal-safe
147 [15479] math: ceil, floor, round and trunc raise inexact exception
148 [15578] localedata: kk_KZ: various updates
149 [16003] localedata: pap_AN: punt old locale
150 [16137] localedata: iw_IL: punt old locale
151 [16190] localedata: eo: new esperanto locale
152 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
153 [16742] malloc: race condition: pthread_atfork() called before first
154 malloc() results in unexpected locking behaviour/deadlocks
155 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
157 [16983] localedata: postal_fmt does not allow %l and %n modifiers
158 [17565] localedata: pt_PT: wrong (work-)week start
159 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
160 [17950] build: Build fails with -msse
161 [18205] localedata: be_BY*: wrong first_weekday and first_workday
162 [18433] libc: posix_spawn does not return correctly upon failure to
164 [18453] localedata: charmaps/IBM875: incorrect codes
165 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
167 [18896] localedata: he_IL: improvements for currency
168 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
170 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
172 [19056] libc: Deprecate readdir_r
173 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
175 [19198] localedata: nl_NL: small improvements for Dutch locales
176 [19257] network: Per-thread memory leak in __res_vinit with IPv6
177 nameservers (CVE-2016-5417)
178 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
180 [19400] locale: Language missing in "iso-639.def", trivial fix in
182 [19431] malloc: Deadlock between fflush, getdelim, and fork
183 [19505] libc: Incorrect file descriptor validity checks in
184 posix_spawn_file_actions_add{open,close,dup2}
185 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
187 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
188 `intl/{gettextP,loadinfo}.h'
189 [19534] libc: execle, execlp may use malloc
190 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
191 [19573] network: res_nclose and __res_maybe_init disagree about name
192 server initialization, breaking Hesiod
193 [19575] localedata: Status of GB18030 tables
194 [19581] localedata: sr_* date_fmt string contains additional newline
195 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
197 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
198 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
199 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
200 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
202 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
204 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
206 [19610] dynamic-link: ldconfig -X removes stale symbolic links
207 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
208 [19633] locale: strfmon_l applies global locale to number formatting
209 [19642] network: Memory leak in getnameinfo
210 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
211 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
213 [19654] math: [x86_64] Need testcase for BZ #19590 fix
214 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
216 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
217 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
219 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
221 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
223 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
224 pointers and lengths in error-case.
225 [19727] locale: Converting from/to UTF-xx with iconv() does not always
226 report errors on UTF-16 surrogates values.
227 [19755] nscd: nscd assertion failure in gc
228 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
229 [19759] libc: mempcpy shouldn't be inlined
230 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
231 [19765] libc: s390 needs an optimized mempcpy
232 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
233 NAME_MAX limit assumption (CVE-2016-1234)
234 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
235 [19787] network: Missing and incorrect truncation checks in getnameinfo
236 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
238 [19791] network: Assertion failure in res_query.c with un-connectable name
240 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
241 [19822] math: libm.so install clobbers old version
242 [19825] network: resolv: send_vc can return uninitialized data in second
243 response to getaddrinfo
244 [19830] network: nss_dns: should check RDATA length against buffer length
245 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
246 confronted with A/AAAA records of invalid size
247 [19837] nss: nss_db: No retries for some long lines with a larger buffer
248 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
249 [19853] stdio: Printing IBM long double in decimal with high precision is
251 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
252 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
253 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
255 [19865] network: Assertion failure or memory leak in
256 _nss_dns_getcanonname_r
257 [19868] network: nss_dns: netent code does not skip over non-PTR records
258 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
260 [19881] string: Improve x86-64 memset
261 [19907] string: Incorrect memcpy tests
262 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
264 [19925] libc: termios.h XCASE namespace
265 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
266 [19929] libc: limits.h NL_NMAX namespace
267 [19931] stdio: Memory leak in vfprintf
268 [19957] libc: clone(CLONE_VM) access invalid parent memory
269 [19963] localedata: en_IL: New locale
270 [19989] stdio: stdio.h cuserid namespace
271 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
273 [19996] locale: langinfo.h nl_langinfo_l namespace
274 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
275 [20010] network: getaddrinfo: Stack overflow in hostent translation
277 [20012] stdio: libio: fmemopen append mode failure
278 [20014] stdio: stdio.h namespace for pre-threads POSIX
279 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
280 [20023] libc: fcntl.h timespec namespace
281 [20024] math: [x86_64] vectorized sincos trashes the stack
282 [20031] network: nss_hesiod: Heap overflow in get_txt_records
283 [20041] time: sys/time.h timespec namespace
284 [20043] libc: unistd.h missing cuserid for UNIX98 and before
285 [20044] libc: unistd.h missing pthread_atfork for UNIX98
286 [20051] libc: ttyslot in wrong header under wrong conditions
287 [20054] libc: gethostname not declared for XPG4
288 [20055] libc: termios.h missing tcgetsid for XPG4
289 [20072] dynamic-link: x86 init_cpu_features is called twice in static
291 [20073] libc: sys/stat.h fchmod namespace
292 [20074] libc: stdlib.h rand_r namespace
293 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
294 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
296 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
297 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
299 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
300 [20119] libc: Wrong mask for processors level type from CPUID
301 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
302 AS not supporting AVX512
303 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
305 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
306 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
308 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
309 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
310 [20178] libc: posix_spawn{p} should not call exit
311 [20191] stdio: libio: vtables hardening
312 [20195] string: FMA4 detection requires CPUID execution with register
314 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
315 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
317 [20212] math: acos (sNaN) returns sNaN
318 [20213] math: asin (sNaN) returns sNaN
319 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
320 [20218] math: [i386] asinhl (sNaN) returns sNaN
321 [20219] math: [i386] atanhl (sNaN) returns sNaN
322 [20222] stdio: fopencookie: Mangle function pointers
323 [20224] math: [i386] cbrtl (sNaN) returns sNaN
324 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
325 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
327 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
328 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
329 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
330 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
331 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
332 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
333 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
334 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
335 [20240] math: modf (sNaN) returns sNaN
336 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
337 [20250] math: frexp (sNaN) returns sNaN
338 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
339 [20255] math: [i386] fdim, fdimf return with excess range and precision /
341 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
342 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
343 subscript is below array bounds [-Werror=array-bounds]
344 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
345 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
347 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
348 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
350 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
352 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
353 [20316] localedata: id_ID: Februari instead of Pebruari
354 [20327] string: POWER8 strcasecmp returns incorrect result
355 [20347] math: Failure: Test: j0_downward (0xap+0)
356 [20348] libc: FAIL: misc/tst-preadvwritev64
357 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
358 [20350] libc: There is no test for p{read,write}64
359 [20357] math: Incorrect cos result for 1.5174239687223976
360 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
364 * Unicode 8.0.0 Support: Character encoding, character type info, and
365 transliteration tables are all updated to Unicode 8.0.0, using new
366 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
367 These updates cause user visible changes, such as the fixes for bugs
368 89, 16061, and 18568.
370 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
371 kernel-internal CPU set size. This means that requests that change the
372 CPU affinity which failed before (for example, an all-ones CPU mask) will
373 now succeed. Applications that need to determine the effective CPU
374 affinities need to call sched_getaffinity or pthread_getaffinity_np after
375 setting it because the kernel can adjust it (and the previous size check
376 would not detect this in the majority of cases).
378 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
379 the following new symbols are used: fts64_children, fts64_close,
380 fts64_open, fts64_read and fts64_set.
382 * getaddrinfo now detects certain invalid responses on an internal netlink
383 socket. If such responses are received, an affected process will
384 terminate with an error message of "Unexpected error <number> on netlink
385 descriptor <number>" or "Unexpected netlink response of size <number> on
386 descriptor <number>". The most likely cause for these errors is a
387 multi-threaded application which erroneously closes and reuses the netlink
388 file descriptor while it is used by getaddrinfo.
390 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
391 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
392 unnecessary serialization of memory allocation requests across threads.
393 The defect is now corrected. Users should see a substantial increase in
394 the concurent throughput of allocation requests for applications which
395 trigger this bug. Affected applications typically create and
396 destroy threads frequently. (Bug 19048 was reported and analyzed by
399 * There is now a --disable-timezone-tools configure option for disabling the
400 building and installing of the timezone related utilities (zic, zdump, and
401 tzselect). This is useful for people who build the timezone data and code
402 independent of the GNU C Library.
404 * The obsolete header <regexp.h> has been removed. Programs that require
405 this header must be updated to use <regex.h> instead.
407 * The obsolete functions bdflush, create_module, get_kernel_syms,
408 query_module and uselib are no longer available to newly linked binaries;
409 the header <sys/kdaemon.h> has been removed. These functions and header
410 were specific to systems using the Linux kernel and could not usefully be
411 used with the GNU C Library on systems with version 2.6 or later of the
414 * Optimized string, wcsmbs and memory functions for IBM z13.
415 Implemented by Stefan Liebler.
417 * Newly linked programs that define a variable called signgam will no longer
418 have it set by the lgamma, lgammaf and lgammal functions. Programs that
419 require signgam to be set by those functions must ensure that they use the
420 variable provided by the GNU C Library and declared in <math.h>, without
421 defining their own copy.
423 * The minimum GCC version that can be used to build this version of the GNU
424 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
425 still be used to compile programs using the GNU C Library.
427 Security related changes:
429 * An out-of-bounds value in a broken-out struct tm argument to strftime no
430 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
432 * The LD_POINTER_GUARD environment variable can no longer be used to disable
433 the pointer guard feature. It is always enabled. Previously,
434 LD_POINTER_GUARD could be used to disable security hardening in binaries
435 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
438 * An integer overflow in hcreate and hcreate_r could lead to an
439 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
441 * The catopen function no longer has unbounded stack usage. Reported by
444 * The nan, nanf and nanl functions no longer have unbounded stack usage
445 depending on the length of the string passed as an argument to the
446 functions. Reported by Joseph Myers. (CVE-2014-9761)
448 * A stack-based buffer overflow was found in libresolv when invoked from
449 libnss_dns, allowing specially crafted DNS responses to seize control
450 of execution flow in the DNS client. The buffer overflow occurs in
451 the functions send_dg (send datagram) and send_vc (send TCP) for the
452 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
453 family. The use of AF_UNSPEC triggers the low-level resolver code to
454 send out two parallel queries for A and AAAA. A mismanagement of the
455 buffers used for those queries could result in the response of a query
456 writing beyond the alloca allocated buffer created by
457 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
458 the overflow. Thanks to the Google Security Team and Red Hat for
459 reporting the security impact of this issue, and Robert Holiday of
460 Ciena for reporting the related bug 18665. (CVE-2015-7547)
462 The following bugs are resolved with this release:
464 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
465 [887] math: Math library function "logb" and "nextafter" inconsistent
466 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
467 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
468 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
469 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
471 [4404] localedata: German translation of "Alarm clock" is misleading
472 [6799] math: nextafter() and nexttoward() doen't set errno on
473 overflow/underflow errors
474 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
476 [10432] nis: _nss_nis_setnetgrent assertion failure
477 [11460] libc: fts has no LFS support
478 [12926] network: getaddrinfo()/make_request() may spin forever
479 [13065] nptl: Race condition in pthread barriers
480 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
481 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
483 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
484 [14912] libc: Rename non-installed bits/*.h headers
485 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
486 [15367] math: Let gcc use __builtin_isinf
487 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
488 [15421] math: lgamma wrongly sets signgam for ISO C
489 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
490 FE_INVALID with argument out of range
491 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
493 [15786] dynamic-link: ifunc resolver functions can smash function
495 [15918] math: Unnecessary check for equality in hypotf()
496 [16061] localedata: Review / update transliteration data
497 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
499 [16141] time: strptime %z offset restriction
500 [16171] math: drem should be alias of remainder
501 [16296] math: fegetround is pure?
502 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
503 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
505 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
506 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
508 [16422] math: [powerpc] math-float, math-double failing llrint tests with
509 "Exception "Inexact" set" on ppc32
510 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
511 [16517] math: Missing underflow exception from tanf/tan/tanl
512 [16519] math: Missing underflow exception from sinhf
513 [16520] math: Missing underflow exception from tanhf
514 [16521] math: Missing underflow exception from exp2
515 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
517 [16734] stdio: fopen calls mmap to allocate its buffer
518 [16961] math: nan function incorrect handling of bad sequences
519 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
520 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
521 [16985] locale: localedef: confusing error message when opening output
523 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
524 [17197] locale: Redundant shift character in iconv conversion output at
526 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
527 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
528 [17250] dynamic-link: static linking breaks nss loading
529 (getaddrinfo/getpwnam/etc...)
530 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
532 [17441] math: isnan() should use __builtin_isnan() in GCC
533 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
534 (related to lock elision)
535 [17787] manual: Exponent on page 324 of the PDF ends prematurely
536 [17886] time: strptime should be able to parse "Z" as a timezone with %z
537 [17887] time: strptime should be able to parse "+01:00" style timezones
538 [17905] libc: catopen() Multiple unbounded stack allocations
540 [18084] libc: backtrace (..., 0) dumps core on x86
541 [18086] libc: nice() sets errno to 0 on success
542 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
543 is too large (CVE-2015-8778)
544 [18251] dynamic-link: SONAME missing when audit modules provides path
545 [18265] libc: add attributes for wchar string and memory functions
546 [18370] math: csqrt missing underflows
547 [18421] libc: [hppa] read-only segment has dynamic relocations
548 [18472] libc: Obsolete syscall wrappers should be compat symbols
549 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
550 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
551 [18525] localedata: Remove locale timezone information
552 [18560] libc: [powerpc] spurious bits/ipc.h definitions
553 [18568] localedata: Update locale data to Unicode 8.0
554 [18589] locale: sort-test.sh fails at random
555 [18595] math: ctan, ctanh missing underflows
556 [18604] libc: assert macro-expands its argument
557 [18610] math: S390: fetestexcept() reports any exception if DXC-code
558 contains a vector instruction exception.
559 [18611] math: j1, jn missing errno setting on underflow
560 [18618] localedata: sync Chechen locale definitions with other *_RU
562 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
563 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
564 [18665] network: In send_dg, the recvfrom function is NOT always using the
565 buffer size of a newly created buffer (CVE-2015-7547)
566 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
568 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
570 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
571 [18699] math: tilegx cproj() for various complex infinities does not yield
573 [18724] libc: Harden put*ent functions against data injection
574 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
575 [18755] build: build errors with -DNDEBUG
576 [18757] stdio: fmemopen fails to set errno on failure
577 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
579 [18781] libc: openat64 lacks O_LARGEFILE
580 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
581 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
582 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
583 [18790] math: [ldbl-128ibm] tanhl inaccurate
584 [18795] libc: stpncpy fortification misses buffer lengths that are
586 [18796] build: build fails for --disable-mathvec
587 [18803] math: hypot missing underflows
588 [18820] stdio: fmemopen may leak memory on failure
589 [18823] math: csqrt spurious underflows
590 [18824] math: fma spurious underflows
591 [18825] math: pow missing underflows
592 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
593 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
594 [18870] build: sem_open.c fails to compile with missing symbol
596 [18872] stdio: Fix memory leak in printf_positional
597 [18873] libc: posix_fallocate overflow check ineffective
598 [18875] math: Excess precision leads incorrect libm
599 [18877] libc: arm: mmap offset regression
600 [18887] libc: memory corruption when using getmntent on blank lines
601 [18918] localedata: hu_HU: change time to HH:MM:SS format
602 [18921] libc: Regression: extraneous stat() and fstat() performed by
604 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
605 binaries (CVE-2015-8777)
606 [18951] math: tgamma missing underflows
607 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
609 [18953] localedata: lt_LT: change currency symbol to the euro
610 [18956] math: powf inaccuracy
611 [18961] math: [i386] exp missing underflows
612 [18966] math: [i386] exp10 missing underflows
613 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
614 [18969] build: multiple string test failures due to missing locale
616 [18970] libc: Reference of pthread_setcancelstate in libc.a
617 [18977] math: float / long double Bessel functions not in XSI POSIX
618 [18980] math: i386 libm functions return with excess range and precision
619 [18981] math: i386 scalb*, ldexp return with excess range and precision
620 [18982] stdio: va_list and vprintf
621 [18985] time: Passing out of range data to strftime() causes a segfault
623 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
624 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
625 [19012] locale: iconv_open leaks memory on error path
626 [19016] math: clog, clog10 inaccuracy
627 [19018] nptl: Mangle function pointers in tls_dtor_list
628 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
629 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
630 [19048] malloc: malloc: arena free list can become cyclic, increasing
632 [19049] math: [powerpc] erfc incorrect zero sign
633 [19050] math: [powerpc] log* incorrect zero sign
634 [19058] math: [x86_64] Link fail with -fopenmp and -flto
635 [19059] math: nexttoward overflow incorrect in non-default rounding modes
636 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
637 [19074] network: Data race in _res_hconf_reorder_addrs
638 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
639 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
640 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
642 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
644 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
645 [19086] manual: posix_fallocate64 documented argument order is wrong.
646 [19088] math: lround, llround missing exceptions close to overflow
648 [19094] math: lrint, llrint missing exceptions close to overflow threshold
649 [19095] math: dbl-64 lrint incorrect for 64-bit long
650 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
651 [19124] dynamic-link: ld.so failed to build with older assmebler
652 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
653 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
654 [19134] math: [powerpc32] lround, lroundf spurious exceptions
655 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
656 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
657 pthread_setaffinity_np
658 [19156] math: [ldbl-128] j0l spurious underflows
659 [19164] nptl: tst-getcpu fails with many possible CPUs
660 [19168] math: math/test-ildoubl and math/test-ldouble failure
661 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
662 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
664 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
665 (FE_NOMASK_ENV) do not clear SSE exceptions
666 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
667 _int_new_arena/reused_arena
668 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
669 [19201] math: dbl-64 remainder incorrect sign of zero result
670 [19205] math: bits/math-finite.h conditions do not match math.h and
672 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
673 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
674 for C99-based standards
675 [19212] libc: features.h not -Wundef clean
676 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
678 [19214] libc: Family and model identification for AMD CPU's are incorrect.
679 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
680 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
682 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
684 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
686 [19242] libc: strtol incorrect in Turkish locales
687 [19243] malloc: reused_arena can pick an arena on the free list, leading
688 to an assertion failure and reference count corruption
689 [19253] time: tzset() ineffective when temporary TZ did not include DST
691 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
692 [19270] math: [hppa] Shared libm missing __isnanl
693 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
694 MAP_HUGETLB and MAP_STACK defines
695 [19313] nptl: Wrong __cpu_mask for x32
696 [19347] libc: grantpt: try to force a specific gid even without pt_chown
697 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
698 [19350] math: [ldbl-128ibm] sinhl spurious overflows
699 [19351] math: [ldbl-128ibm] logl inaccurate near 1
700 [19363] time: x32: times() return value wrongly truncates/sign extends
702 [19367] dynamic-link: Improve branch prediction on Silvermont
703 [19369] network: Default domain name not reset by res_ninit when "search"
704 / "domain" entry is removed from resolv.conf
705 [19375] math: powerpc: incorrect results for POWER7 logb with negative
707 [19385] localedata: bg_BG: time separator should be colon, not comma
708 [19408] libc: linux personality syscall wrapper may erroneously return an
709 error on 32-bit architectures
710 [19415] libc: dladdr returns wrong names on hppa
711 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
712 IBM905, IBM907, and IBM909
713 [19439] math: Unix98 isinf and isnan functions conflict with C++11
714 [19443] build: build failures with -DDEBUG
715 [19451] build: Make check fails on test-double-vlen2
716 [19462] libc: Glibc failed to build with -Os
717 [19465] math: Wrong code with -Os
718 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
720 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
722 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
723 [19486] math: S390: Math tests fail with "Exception Inexact set".
724 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
725 [19550] libc: [mips] mmap negative offset handling inconsistent with other
727 [19590] math: Fail to build shared objects that use libmvec.so functions.
731 * The following bugs are resolved with this release:
733 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
734 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
735 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
736 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
737 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
738 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
739 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
740 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
741 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
742 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
743 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
744 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
745 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
746 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
747 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
748 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
749 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
750 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
751 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
752 18657, 18676, 18694, 18696, 18887.
754 * Cache information can be queried via sysconf() function on s390 e.g. with
755 _SC_LEVEL1_ICACHE_SIZE as argument.
757 * A buffer overflow in gethostbyname_r and related functions performing DNS
758 requests has been fixed. If the NSS functions were called with a
759 misaligned buffer, the buffer length change due to pointer alignment was
760 not taken into account. This could result in application crashes or,
761 potentially arbitrary code execution, using crafted, but syntactically
762 valid DNS responses. (CVE-2015-1781)
764 * The time zone file parser has been made more robust against crafted time
765 zone files, avoiding heap buffer overflows related to the processing of
766 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
767 large time zone data files. Overly long time zone specifiers in the TZ
768 variable no longer result in stack overflows and crashes.
770 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
771 for LD and GD on x86 and x86-64, has been implemented. You will need
772 binutils-2.24 or later to enable this optimization.
774 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
775 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
776 Hat). These updates cause user visible changes, such as the fix for bug
779 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
780 and getXXbyYY NSS calls for the same database, causing a denial-of-service
781 condition in some applications.
783 * Added vector math library named libmvec with the following vectorized x86_64
784 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
786 The library can be disabled with --disable-mathvec. Use of the functions is
787 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
788 Shared library libmvec.so is linked in as needed when using -lm (no need to
789 specify -lmvec explicitly for not static builds).
790 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
792 * A new fmemopen implementation has been added with the goal of POSIX
793 compliance. The new implementation fixes the following long-standing
794 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
795 old implementation is still present for use be by existing binaries.
797 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
798 releases. It has been fixed to match 2.19 and older, but binaries built
799 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
801 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
802 Contributed by Roland McGrath (Google).
804 * The header <regexp.h> is deprecated, and will be removed in a future
805 release. Use of this header will trigger a deprecation warning.
806 Application developers should update their code to use <regex.h> instead.
808 This header was formerly part of SUS, but was deprecated in 1994 and
809 removed from the standard in 2001. Also, the glibc implementation
810 leaks memory. See BZ#18681 for more details.
814 * The following bugs are resolved with this release:
816 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
817 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
818 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
819 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
820 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
821 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
822 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
823 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
824 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
825 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
828 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
829 too little memory for the to-be-scanned arguments and overflow the
830 allocated buffer. The implementation now correctly computes the required
831 buffer size when using malloc, and switches to malloc from alloca as
834 * A new semaphore algorithm has been implemented in generic C code for all
835 machines. Previous custom assembly implementations of semaphore were
836 difficult to reason about or ensure that they were safe. The new version
837 of semaphore supports machines with 64-bit or 32-bit atomic operations.
838 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
839 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
841 * Port to Altera Nios II has been contributed by Mentor Graphics.
843 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
844 implementations for powerpc64/powerpc64le.
845 Implemented by Adhemerval Zanella (IBM).
847 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
848 and powerpc64le. This may improve lock scaling of existing programs on
849 HTM capable systems. The lock elision code is only enabled with
850 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
851 powerpc will issue a transaction abort on every syscall to avoid side
852 effects being visible outside transactions.
854 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
855 AArch64. Contributed by ARM Ltd.
857 * i386 memcpy functions optimized with SSE2 unaligned load/store.
859 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
860 under certain input conditions resulting in the execution of a shell for
861 command substitution when the application did not request it. The
862 implementation now checks WRDE_NOCMD immediately before executing the
863 shell and returns the error WRDE_CMDSUB as expected.
865 * CVE-2012-3406 printf-style functions could run into a stack overflow when
866 processing format strings with a large number of format specifiers.
868 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
869 infinite loop if the DNS response contained a PTR record of an unexpected
872 * The minimum GCC version that can be used to build this version of the GNU
873 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
874 still be used to compile programs using the GNU C Library.
876 * The GNU C Library is now built with -Werror by default. This can be
877 disabled by configuring with --disable-werror.
879 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
881 * The obsolete sigvec function has been removed. This was the original
882 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
883 programs have been using instead for about 25 years. Of course, ABI
884 compatibility for old binaries using sigvec remains intact.
886 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
887 with newer versions of bison.
889 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
890 The original MIPS o32 hard-float ABI requires an FPU where double-precision
891 registers overlay two consecutive single-precision registers. MIPS32R2
892 introduced a new FPU mode (FR=1) where double-precision registers extend the
893 corresponding single-precision registers which is incompatible with the
894 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
895 require the use of FR=1 making a transition necessary. New o32 ABI
896 extensions enable users to migrate over time from the original o32 ABI
897 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
898 tracks the ABI of any loaded object and verifies that new objects are
899 compatible. Mode transitions will also be requested as required and
900 unsupportable objects will be rejected. The ABI checks include both soft and
901 hard float ABIs for o32, n32 and n64.
903 GCC 5 with GNU binutils 2.25 onwards:
904 It is strongly recommended that all o32 system libraries are built using the
905 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
906 with the original and all new o32 ABI extensions. Configure a MIPS GCC
907 compiler using --with-fp-32=xx to set this by default.
911 * The following bugs are resolved with this release:
913 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
914 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
915 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
916 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
917 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
918 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
919 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
920 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
921 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
922 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
923 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
924 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
925 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
926 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
927 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
929 * Reverted change of ABI data structures for s390 and s390x:
930 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
931 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
932 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
933 are preserved pointing straight to the same implementation as the old ones.
934 Given that, new callers will simply provide a too-big buffer to these
935 functions. Any applications/libraries out there that embed jmp_buf or
936 ucontext_t in an ABI-relevant data structure that have already been rebuilt
937 against 2.19 headers will have to rebuilt again. This is necessary in any
938 case to revert the breakage in their ABI caused by the glibc change.
940 * Support for file description locks is added to systems running the
941 Linux kernel. The standard file locking interfaces are extended to
942 operate on file descriptions, not file descriptors, via the use of
943 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
944 are associated with an open file instead of a process.
946 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
948 * The minimum Linux kernel version that this version of the GNU C Library
949 can be used with is 2.6.32.
951 * Running the testsuite no longer terminates as soon as a test fails.
952 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
953 with PASS or FAIL lines for individual tests. A summary of the results is
954 printed, including a list of failing lists, and "make check" exits with
955 error status if there were any unexpected failures. "make check
956 stop-on-test-failure=y" may be used to keep the old behavior.
958 * The am33 port, which had not worked for several years, has been removed
961 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
962 supported; they now act the same as _DEFAULT_SOURCE (but generate a
963 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
964 conflicted with POSIX (support for which was removed in 2.19), the
965 interfaces those macros enabled remain available when compiling with
966 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
969 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
971 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
972 This may improve lock scaling of existing programs on TX capable systems.
973 The lock elision code is only built with --enable-lock-elision=yes and
974 then requires a GCC version supporting the TX builtins. With lock elision
975 default mutexes are elided via __builtin_tbegin, if the cpu supports
976 transactions. By default lock elision is not enabled and the elision code
979 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
980 copy the path argument. This allowed programs to cause posix_spawn to
981 deference a dangling pointer, or use an unexpected pathname argument if
982 the string was modified after the posix_spawn_file_actions_addopen
985 * All supported architectures now use the main glibc sysdeps directory
986 instead of some being in a separate "ports" directory (which was
987 distributed separately before glibc 2.17).
989 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
990 On configurations that support it (all Linux configurations), it's now
991 used regardless of the --enable-add-ons switch to configure. It is no
992 longer possible to build such configurations without pthreads support.
994 * Locale names, including those obtained from environment variables (LANG
995 and the LC_* variables), are more tightly checked for proper syntax.
996 setlocale will now fail (with EINVAL) for locale names that are overly
997 long, contain slashes without starting with a slash, or contain ".." path
998 components. (CVE-2014-0475) Previously, some valid locale names were
999 silently replaced with the "C" locale when running in AT_SECURE mode
1000 (e.g., in a SUID program). This is no longer necessary because of the
1003 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1004 with application code using Intel MPX instructions. (With all previous
1005 versions, the MPX register state could be clobbered when making calls
1006 into or out of a shared library.) Note that while the new dynamic
1007 linker is compatible with all known x86 hardware whether or not it
1008 supports Intel MPX, some x86 instruction-set emulators might fail to
1009 handle the new instruction encodings. This is known to affect Valgrind
1010 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1011 release), and might affect other tools that do instruction emulation.
1013 * Support for loadable gconv transliteration modules has been removed.
1014 The support for transliteration modules has been non-functional for
1015 over a decade, and the removal is prompted by security defects. The
1016 normal gconv conversion modules are still supported. Transliteration
1017 with //TRANSLIT is still possible, and the //IGNORE specifier
1018 continues to be supported. (CVE-2014-5119)
1020 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1021 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1022 resulting a denial-of-service security vulnerability in applications which
1023 use functions related to iconv. (CVE-2014-6040)
1027 * The following bugs are resolved with this release:
1029 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1030 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1031 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1032 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1033 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1034 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1035 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1036 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1037 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1038 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1039 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1040 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1041 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1042 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1043 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1044 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1045 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1046 16431, 16453, 16474, 16506, 16510, 16529
1048 * Slovenian translations for glibc messages have been contributed by the
1049 Translation Project's Slovenian team of translators.
1051 * The public headers no longer use __unused nor __block. This change is to
1052 support compiling programs that are derived from BSD sources and use
1053 __unused internally, and to support compiling with Clang's -fblock
1054 extension which uses __block.
1056 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1057 large collation sequences to optimize multiple passes. This cache
1058 computation may overflow for large collation sequences and may cause a
1059 stack or buffer overflow. This is now fixed to use a slower algorithm
1060 which does not use a cache if there is an integer overflow.
1062 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1063 rules for large collation sequences to optimize multiple passes and falls
1064 back to alloca if malloc fails, resulting in a possible stack overflow.
1065 The implementation now falls back to an uncached collation sequence lookup
1068 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1069 initialized for static applications resulting in the security feature
1070 being disabled. The pointer guard is now correctly initialized to a
1071 random value for static applications. Existing static applications need
1072 to be recompiled to take advantage of the fix (bug 15754).
1074 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1075 to the d_name member of struct dirent, or omit the terminating NUL
1076 character. (Bugzilla #14699).
1078 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1079 aligned_alloc functions could allocate too few bytes or corrupt the
1080 heap when passed very large allocation size values (Bugzilla #15855,
1083 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1084 for AF_INET6 has been fixed (Bugzilla #16072).
1086 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1087 pap_CW, quz_PE, the_NP.
1089 * Substantially revised locales: gd_GB, ht_HT
1091 * The LC_ADDRESS field was updated to support country_car for almost all
1094 * ISO 1427 definitions were updated.
1096 * ISO 3166 definitions were updated.
1098 * The localedef utility now supports --big-endian and --little-endian
1099 command-line options to generate locales for a different system from that
1100 for which the C library was built.
1102 * Binary locale files now only depend on the endianness of the system for
1103 which they are generated and not on other properties of that system. As a
1104 consequence, binary files generated with new localedef may be incompatible
1105 with old versions of the GNU C Library, and binary files generated with
1106 old localedef may be incompatible with this version of the GNU C Library,
1107 in the following circumstances:
1109 + Locale files may be incompatible on m68k systems.
1111 + Locale archive files (but not separate files for individual locales) may
1112 be incompatible on systems where plain "char" is signed.
1114 * The configure option --disable-versioning has been removed. Builds with
1115 --disable-versioning had not worked for several years.
1117 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1118 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1120 * SystemTap probes for malloc have been introduced.
1122 * SystemTap probes for slow multiple precision fallback paths of
1123 transcendental functions have been introduced.
1125 * Support for powerpc64le has been added.
1127 * The soft-float powerpc port now supports e500 processors.
1129 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1131 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1132 set of header declarations that are enabled by default, even when other
1133 feature test macros or compiler options such as -std=c99 would otherwise
1134 disable some of those declarations.
1136 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1137 conflict with POSIX. The libbsd-compat library (which was a dummy library
1138 that did nothing) has also been removed.
1140 * Preliminary documentation about Multi-Thread, Async-Signal and
1141 Async-Cancel Safety has been added.
1143 * Change of ABI data structures for s390 and s390x:
1144 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1145 allow for future hardware extensions. All library functions that accept or
1146 return these structures were versioned in order to provide backwards
1147 compatibility with existing code. However, not all cases can be handled
1148 with interface versioning. If an application embeds either structure into
1149 another structure and that structure is passed to another compilation unit
1150 which expects the newer larger-sized object then any access to the new
1151 fields will result in undefined behaviour. Similarly any access to fields
1152 that were moved by the enlarging of the structures will cause undefined
1153 behaviour. To fix the undefined behaviour all objects that are part of the
1154 final in-memory image must agree on the size of structures, and this may
1155 require recompilation.
1159 * The following bugs are resolved with this release:
1161 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1162 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1163 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1164 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1165 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1166 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1167 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1168 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1169 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1170 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1171 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1172 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1173 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1176 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1177 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1178 Distributions can re-enable building and using pt_chown via the new configure
1179 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1180 considerable security risks and should only be used if the distribution
1181 understands and accepts the risks.
1183 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1186 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1187 fixed (Bugzilla #15330).
1189 * Add support for calling C++11 thread_local object destructors on thread
1190 and program exit. This needs compiler support for offloading C++11
1191 destructor calls to glibc.
1193 * Improved worst case performance of libm functions with double inputs and
1196 * Support for priority inherited mutexes in pthread condition variables on
1197 non-x86 architectures.
1199 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1201 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1203 * Optimized string functions for ARM. Implemented by Will Newton and
1206 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1208 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1211 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1212 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1214 * Added a benchmark framework to track performance of functions in glibc.
1216 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1217 It is based on draft TS 18661 and currently enabled as a GNU extension.
1219 * On Linux, the clock function now uses the clock_gettime system call
1220 for improved precision, rather than old times system call.
1222 * Added support for version-3 tz format files. This is needed when using
1223 the tz database release 2013e or later, and affects a few unusual cases --
1224 currently only TZ='America/Godthab' for time stamps after 2037.
1226 * Added new API functions pthread_getattr_default_np and
1227 pthread_setattr_default_np to get and set the default pthread
1228 attributes of a process.
1230 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1231 This may improve lock scaling of existing programs on TSX capable systems.
1232 When the --enable-lock-elision=yes parameter is specified at configure
1233 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
1236 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
1237 availability). Implemented by Ryan S. Arnold.
1239 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
1243 * The following bugs are resolved with this release:
1245 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
1246 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
1247 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
1248 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
1249 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
1250 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
1251 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
1252 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
1253 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
1254 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
1255 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
1256 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
1257 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
1258 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
1259 14879, 14889, 14893, 14898, 14914.
1261 * Optimization of memcpy for MIPS.
1263 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
1264 EMFILE has been fixed (Bugzilla #14889).
1266 * The add-on ports collection is now distributed in the "ports" subdirectory
1267 of the main GNU C Library distribution, rather than separately.
1269 * Port to ARM AArch64 contributed by Linaro.
1271 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
1272 Optimized versions of memcpy, memset, and memcmp added for System z10 and
1274 Implemented by Andreas Krebbel.
1276 * The new function secure_getenv allows secure access to the environment,
1277 returning NULL if running in a SUID/SGID process. This function replaces
1278 the internal function __secure_getenv.
1280 * SystemTap static probes have been added into the dynamic linker.
1281 Implemented by Gary Benson.
1283 * Optimizations of string functions strstr, strcasestr and memmem.
1284 Implemented by Maxim Kuvyrkov.
1286 * The minimum Linux kernel version that this version of the GNU C Library
1287 can be used with is 2.6.16.
1289 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
1290 powerpc POWER7. Implemented by Will Schmidt.
1292 * New configure option --disable-nscd builds the C library such that it
1293 never attempts to contact the Name Service Caching Daemon (nscd).
1294 New configure option --disable-build-nscd avoids building nscd itself;
1295 this is the default if --disable-nscd is used.
1297 * Improved support for cross-compilation, including cross-testing and
1298 bootstrap builds without a previously built glibc.
1300 * Several testsuite tests are now able to test multiple IFUNC variants of an
1301 interface, rather than just testing the one that would be chooen by
1304 * New configure options --with-bugurl and --with-pkgversion, for
1305 distributors to use to embed their bug-reporting and package version
1306 information in --help and --version output.
1308 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1309 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1310 allows creation of chroots without the procfs mounted on /proc.
1312 * The `crypt' function now fails if passed salt bytes that violate the
1313 specification for those values. On Linux, the `crypt' function will
1314 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1315 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1316 when the mode is enabled.
1318 * The `clock_*' suite of functions (declared in <time.h>) is now available
1319 directly in the main C library. Previously it was necessary to link with
1320 -lrt to use these functions. This change has the effect that a
1321 single-threaded program that uses a function such as `clock_gettime' (and
1322 is not linked with -lrt) will no longer implicitly load the pthreads
1323 library at runtime and so will not suffer the overheads associated with
1324 multi-thread support in other code such as the C++ runtime library.
1326 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1331 * The following bugs are resolved with this release:
1333 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1334 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1335 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1336 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1337 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1338 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1339 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1340 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1341 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1342 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1343 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1344 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1345 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1346 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1347 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1348 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1349 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1350 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1351 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1352 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1353 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1354 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1357 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1358 configuring glibc with:
1359 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1360 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1361 Implemented by H.J. Lu.
1365 + define static_assert
1367 + do not declare gets
1369 + declare at_quick_exit and quick_exit also for ISO C11
1371 + aligned_alloc. NB: The code is deliberately allows the size parameter
1372 to not be a multiple of the alignment. This is a moronic requirement
1373 in the standard but it is only a requirement on the caller, not the
1376 + timespec_get added
1378 + uchar.h support added
1380 + CMPLX, CMPLXF, CMPLXL added
1382 Implemented by Ulrich Drepper.
1384 * Support for the IA-64 has been moved to ports.
1386 * Remove support for anything but ELF binary format
1388 * Checking versions of poll, ppoll added.
1389 Implemented by Ulrich Drepper.
1391 * More generic and 64-bit performance optimizations to math functions.
1392 Implemented by Ulrich Drepper.
1394 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1395 headers and functions available at compile time as they were before
1396 version 2.14. This option will be removed at some time in the future
1397 after the TI-RPC library becomes fully sufficient for the needs of
1398 existing applications.
1400 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1401 Note that glibc is not expected to work with any Linux kernel version
1404 * New header <sys/auxv.h> and function getauxval allowing easy access to
1405 the AT_* key-value pairs passed from the Linux kernel. The header also
1406 defines the HWCAP_* bits associated with the AT_HWCAP key.
1408 * New locales: mag_IN
1410 * New configure option --enable-systemtap builds SystemTap static probes
1411 into libc for setjmp and longjmp and into libpthread for various operations.
1412 So far the setjmp/longjmp probes and some of the libpthread probes are
1413 provided only for i*86 and x86_64.
1414 Implemented by Roland McGrath and Rayson Ho.
1416 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1418 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1421 * More optimized functions for SPARC. Implemented by David S. Miller.
1423 * Improved support for cross-compilation, especially bootstrap builds
1424 without a previously built glibc.
1426 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1427 Chris Metcalf from Tilera.
1429 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1430 now supported for ARM processors.
1432 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1433 as the name of the dynamic linker, to distinguish it from the
1434 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1436 * Support for CRIS has been removed from ports.
1438 * A new class of installed header has been documented for low-level
1439 platform-specific functionality. PowerPC added the first instance with a
1440 function to provide time base register access. Contributed by Tulio
1441 Magno Quites Machado Filho.
1443 * ix86 configurations now install header files that are consistent with
1444 what x86-64 configurations install. These same header files can be used
1445 for -m32, -m64, or -mx32 builds.
1446 Contributed by H.J. Lu.
1448 * Math library bug fixes. A thorough audit of all open math library bugs was
1449 conducted by Joseph Myers. Significant progress was made on many math
1450 library bugs resulting in more accurate exceptions and function results.
1451 Many thanks to all those that contributed including Andreas Jaeger for his
1452 patch review and work on the x87 trigonometric instruction issues.
1454 * Timezone data is no longer installed. Timezone-related binaries and scripts
1455 will continue to be installed. Users should obtain their timezone data from
1456 their distribution provider or from the tzdata package at
1457 <ftp://munnari.oz.au/pub/>.
1461 * The following bugs are resolved with this release:
1463 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1464 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1465 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1466 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1467 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1468 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1469 13484, 13506, 13515, 13523, 13524, 13538, 13540
1471 * New program pldd to list loaded object of a process
1472 Implemented by Ulrich Drepper.
1474 * Add nss_db support back to glibc. No more dependency on Berkeley db
1475 and support for initgroups lookups.
1476 Implemented by Ulrich Drepper.
1478 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1479 Contributed by HJ Lu.
1481 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1482 Contributed by HJ Lu.
1484 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1485 on x86-32 and x86-64.
1486 Contributed by Liubov Dmitrieva.
1488 * Optimized strchr and strrchr for SSE on x86-32.
1489 Contributed by Liubov Dmitrieva.
1491 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1492 for x86-64 and x86-32.
1493 Contributed by Liubov Dmitrieva.
1495 * New interfaces: scandirat, scandirat64
1496 Implemented by Ulrich Drepper.
1498 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1499 Implemented by Ulrich Drepper.
1501 * nscd now also caches the netgroup database.
1502 Implemented by Ulrich Drepper.
1504 * Integrate libm with gcc's -ffinite-math-only option.
1505 Implemented by Ulrich Drepper.
1507 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1508 to math functions. Implemented by Ulrich Drepper.
1510 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1511 Implemented by Ulrich Drepper.
1513 * New Linux interfaces: process_vm_readv, process_vm_writev
1515 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1516 Implemented by Ulrich Drepper.
1518 * Optimized nearbyint and strcasecmp for PPC.
1519 Implemented by Adhemerval Zanella.
1521 * New locales: bho_IN, unm_US, es_CU, ta_LK
1525 * The following bugs are resolved with this release:
1527 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1528 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1529 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1530 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1531 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1532 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1533 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1534 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1535 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1536 12795, 12811, 12813, 12814, 12841
1538 * The RPC implementation in libc is obsoleted. Old programs keep working
1539 but new programs cannot be linked with the routines in libc anymore.
1540 Programs in need of RPC functionality must be linked against TI-RPC.
1541 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1543 Visible changes of this change include (obviously) the inability to link
1544 programs using RPC functions without referencing the TI-RPC library and the
1545 removal of the RPC headers from the glibc headers.
1546 Implemented by Ulrich Drepper.
1548 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1549 syncfs, setns, sendmmsg
1551 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1552 yue_HK, lij_IT, mhr_RU
1554 * New encodings: CP770, CP771, CP772, CP773, CP774
1556 * New program sotruss to trace calls through PLTs
1557 Implemented by Ulrich Drepper.
1559 * The malloc hook implementation is marked deprecated and will be removed
1560 from the default implementation in the next version. The design never
1561 worked ever since the introduction of threads. Even programs which do
1562 not create threads themselves can use multiple threads created internally.
1566 * The following bugs are resolved with this release:
1568 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1569 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1570 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1571 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1574 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1576 * POWER7 optimizations: memset, memcmp, strncmp
1578 * New optimized string functions for x86-64: strnlen (SSE2),
1579 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1580 Implemented by Ulrich Drepper.
1584 * The following bugs are resolved with this release:
1586 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1587 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1588 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1589 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1590 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1591 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1592 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1593 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1595 * New interfaces: pthread_getname_np, pthread_setname_np
1597 * New Linux interface: recvmmsg
1599 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1601 * The dynamic linker now recognizes supported ABI versions from the
1602 EI_ABIVERSION field in the ELF header.
1603 Implemented by Ulrich Drepper.
1605 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1606 will not be used to fill in password fields in the passwd.byname replies.
1607 Instead it is used to synthesize the shadow.byname table, should it be
1608 missing. This is a useful mode in some installations involving Solaris.
1609 Implemented by Ulrich Drepper.
1611 * New locales: kok_IN, sq_MK, cv_RU
1615 * The following bugs are resolved with this release:
1617 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1618 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1619 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1620 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1621 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1622 10789, 10817, 10823, 10840, 10847
1624 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1626 Implemented by Ulrich Drepper.
1628 * Checking version of longjmp added that fails if an uninitialized stack
1629 frame would be created. Implemented by Ulrich Drepper.
1631 * STT_GNU_IFUNC is now supported in static executables.
1632 Implemented by H.J. Lu.
1634 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1636 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1637 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1638 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1639 Contributed by H.J. Lu.
1641 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1642 Implemented by Ulrich Drepper.
1644 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1646 Contributed by H.J. Lu.
1648 * Support for fma instruction in AVX on x86-64.
1649 Implemented by H.J. Lu and Ulrich Drepper.
1651 * AVX support in x86-64 auditing support in ld.so.
1652 Implemented by H.J. Lu.
1654 * STB_GNU_UNIQUE support added.
1655 Implemented by Ulrich Drepper.
1657 * Implement second fallback mode for optimized DNS lookup for even more
1658 broken environments. If two requests from the same port are not
1659 handled correctly close the socket and open a new one before sending
1660 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1661 can be used to select this mode right away, instead of rediscovering the
1662 necessity is every process again.
1663 Implemented by Ulrich Drepper.
1665 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1666 Implemented by Adam Tkac.
1668 * Optimized iconv conversions for S390x.
1669 Implemented by Andreas Krebbel.
1671 * Using condvars with PI mutexes is now more efficient due to kernel
1672 support for requeueing to PI futexes. NPTL support added for x86-64.
1673 Implemented by Ulrich Drepper.
1675 * New locales: ps_AF, my_MM
1679 * The following bugs are resolved with this release:
1681 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1682 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1683 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1684 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1685 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1687 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1688 Implemented by Ulrich Drepper.
1690 * New Linux interfaces: accept4, fallocate, fallocate64.
1691 Implemented by Ulrich Drepper.
1693 * Correct declarations of string function when used in C++ code. This
1694 could lead to compile errors for invalid C++ code.
1696 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1699 * New POSIX 2008 interface: psiginfo
1700 Implemented by Ulrich Drepper.
1702 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1703 Implemented by Ulrich Drepper.
1705 * Support for selecting between multiple function definitions at runtime
1706 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1708 * The libcrypt library can now use the hash function implementations in
1709 NSS. Implemented by Ulrich Drepper.
1711 * The malloc implementation can be compiled to be less memory efficient
1712 but higher performing in multi-threaded programs.
1713 Implemented by Ulrich Drepper.
1715 * New locales: nan_TW@latin, ks_IN
1717 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1718 Implemented by Ulrich Drepper.
1720 * Extended printf hook support. It is possible to use user-defined types
1721 and extend existing format specifiers.
1722 Implemented by Ulrich Drepper.
1724 * Handling for group shadow files has been added.
1725 Implemented by Ulrich Drepper.
1727 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1728 servers (the case, e.g., for some people using the built-in DNS
1729 server in ADSL modems/routers). There is a once-per-process timeout
1730 in case of a broken server. To avoid it, users can run nscd or put
1731 'options single-request' in /etc/resolv.conf.
1732 Implemented by Ulrich Drepper.
1736 * The following bugs are resolved with this release:
1738 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1739 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1740 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1741 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1742 6968, 6974, 6980, 6995, 7008, 7009, 7029
1744 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1745 up at the same time. Implemented by Ulrich Drepper.
1747 * TLS descriptors for LD and GD on x86 and x86-64.
1748 Implemented by Alexandre Oliva.
1750 * getaddrinfo now handles DCCP and UDPlite.
1751 Implemented by Ulrich Drepper.
1753 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1754 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1755 Implemented by Ulrich Drepper.
1757 * New implementation of memmem, strstr, and strcasestr which is O(n).
1758 Implemented by Eric Blake.
1760 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1762 * Implement "e" option for popen to open file descriptor with the
1763 close-on-exec flag set. Implemented by Ulrich Drepper.
1765 * Implement "b" mode for fmemopen. In this mode writes writes don't
1766 implicitly add a NUL byte and seeks from the end of the buffer really
1767 use the buffer end, not the string length as the basis.
1768 Implemented by Ulrich Drepper.
1770 * Many functions, exported and internal, now atomically set the close-on-exec
1771 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1773 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1775 Implemented by Pravin Satpute.
1777 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1781 * The following bugs are resolved with this release:
1783 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1784 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1785 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1786 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1787 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1788 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1789 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1791 * New locales: bo_CN, bo_IN, shs_CA.
1793 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1795 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1796 Implemented by Pravin Satpute.
1798 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1800 * nscd caches now all timeouts for DNS entries
1801 Implemented by Ulrich Drepper.
1803 * nscd is more efficient and wakes up less often.
1804 Implemented by Ulrich Drepper.
1806 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1807 vdprintf, and obstack_vprintf.
1808 Implemented by Jakub Jelinek.
1810 * Faster memset for x86-64.
1811 Implemented by Harsha Jagasia and H.J. Lu.
1813 * Faster memcpy on x86.
1814 Implemented by Ulrich Drepper.
1816 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1817 Implemented by Ulrich Drepper.
1819 * Faster sqrt and sqrtf implemention for some PPC variants.
1820 Implemented by Steven Munroe.
1824 * The following bugs are resolved with this release:
1826 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1827 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1828 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1829 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1830 5071, 5103, 5104, 5112, 5113, 5184, 5186
1832 * More checking functions: fread, fread_unlocked, open*, mq_open.
1833 Implemented by Jakub Jelinek and Ulrich Drepper.
1835 * Extend fortification to C++. Implemented by Jakub Jelinek.
1837 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1838 by not recognizing 'a' as a modifier when those specs are requested.
1839 Implemented by Jakub Jelinek.
1841 * PPC optimizations to math and string functions.
1842 Implemented by Steven Munroe.
1844 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1845 options to be passed. Implemented by Ulrich Drepper.
1847 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1849 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1850 Implemented by Ulrich Drepper.
1852 * Handle private futexes in the NPTL implementation.
1853 Implemented by Jakub Jelinek and Ulrich Drepper.
1855 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1856 Implemented by Roland McGrath and Ulrich Drepper.
1858 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1860 * SHA-256 and SHA-512 based password encryption.
1861 Implemented by Ulrich Drepper.
1863 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1864 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1867 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1868 Implemented by Ulrich Drepper.
1872 * The following bugs are resolved with this release:
1874 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1875 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1876 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1877 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1878 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1879 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1880 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1883 * New Linux interfaces: epoll_pwait, sched_getcpu.
1885 * New generic interfaces: strerror_l.
1887 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1891 * The following bugs are resolved with this release:
1893 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1894 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1895 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1896 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1897 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1898 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1899 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1900 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1901 3225, 3251, 3252, 3253, 3273
1903 * For Linux, the sorting of addresses returned by getaddrinfo now also
1904 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1905 Implemented by Ulrich Drepper.
1907 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1908 Implemented by Ulrich Drepper.
1910 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1912 * New iconv module for MIK. Contributed by Alexander Shopov.
1914 * For sites with broken group and/or passwd database, the auto-propagate
1915 option of nscd can prevent creating ID lookup entries from the results
1916 of a name lookup and vice versa. This usually is no problem but some
1917 site might have problems with the default behavior.
1918 Implemented by Ulrich Drepper.
1920 * Iterating over entire database in NIS can be slow. With the
1921 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1922 to trade time for memory. The entire database will be read at once.
1923 Implemented by Ulrich Drepper.
1925 * The interfaces introduced in RFC 3542 have been implemented by
1928 * Support for the new ELF hash table format was added by Ulrich Drepper.
1930 * Support for priority inheritance mutexes added by Jakub Jelinek and
1933 * Support for priority protected mutexes added by Jakub Jelinek.
1935 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1936 or_IN, csb_PL, fy_NL, sr_ME.
1940 * More overflow detection functions.
1942 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1943 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1945 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1946 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1947 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1948 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1949 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1950 by Masahide Washizawa.
1952 * It is now possible to install audit libraries for the dynamic linker using
1953 LD_AUDIT. Implemented by Ulrich Drepper.
1955 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1956 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1957 For a libc and libpthread that works well on Linux 2.4 kernels, we
1958 recommend using the stable 2.3 branch.
1960 * The new function open_wmemstream acts like open_memstream,
1961 but uses a wchar_t wide character buffer.
1963 * The new function ppoll is an improved version of poll, similar to pselect.
1965 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1966 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1967 renameat, unlinkat, linkat, symlinkat, readlinkat.
1969 * New Linux kernel system calls: unshare,
1970 inotify_init, inotify_add_watch, inotify_rm_watch.
1972 * The euidaccess function is now also known by the alias eaccess,
1973 for compatibility with some other systems.
1975 * Timezone data updated to 2006b version.
1979 * The following bugs are resolved with this release:
1981 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1982 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1983 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1984 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1985 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1986 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1988 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1990 * As of this release, GCC 4 can be used to compile the C Library.
1992 * Timezone data updated to 2005m version.
1996 * The following bugs are resolved with this release:
1998 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1999 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2000 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2001 777, 787, 821, 822, 823, 825
2003 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2007 * Support for RFC 3678. Real implementations exist only for Linux so far.
2008 Implemented by Ulrich Drepper.
2010 * nscd can now cache entries persistently. Expiring entries are reloaded.
2011 For speedups the cache can be shared in memory with client processes.
2012 Implemented by Ulrich Drepper.
2014 * nscd can now perform SELinux checks.
2015 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2017 * getaddrinfo queries are now cached. Canonical name lookup is performed
2019 Implemented by Ulrich Drepper.
2021 * The nothrow function attribute is used when headers are used by gcc when
2022 compiling C code. This can avoid significant amounts of exception
2025 * The malloc functions perform more error checking and are stricter when
2026 it comes to reacting on errors. The default action is to terminate
2027 the process after showing an error message. Implemented by Ulrich Drepper.
2029 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2030 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2032 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2033 namespaces using the new function dlmopen(). This feature is of course,
2034 like most other dynamic loading functionality, not available in statically
2035 linked applications. Implemented by Ulrich Drepper.
2037 * Low-overhead boundary checking variants of string and some stdio functions
2038 were added. These are to be used in conjunction with a gcc patch by
2039 Jakub Jelinek which adds calls to these functions if possible.
2040 Implemented by Jakub Jelinek and Ulrich Drepper.
2042 * Old code for several operating systems and machine architectures that
2043 have not been in working condition in a long time have been removed from
2044 the main source tree maintained by the GNU C Library's maintainers.
2045 These files are now reside in the separate `ports' source module
2046 that is usable as an add-on when building the library.
2050 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2051 interrogate the dynamic linker, compatible with the Solaris interface.
2053 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2054 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2056 * getifaddrs now uses the netlink interface on Linux to get its information.
2057 Implemented by Thorsten Kukuk.
2059 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2060 Implemented by Ulrich Drepper.
2062 * support for non-executable stacks on x86 has been added. Changes mostly
2065 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2068 * getaddrinfo now performs destination address selection according to
2073 * Thread-safe interfaces for many functions that access locale data
2074 were added in version 2.3, but these features were omitted from NEWS.
2075 Many functions have variants with an `_l' suffix that take a `locale_t'
2076 object as a parameter rather than consulting the current locale.
2077 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2078 create and maintain `locale_t' objects. Additionally, the new function
2079 `uselocale' sets "the current locale" (as used by functions not so
2080 parameterized) set for an individual thread. These features were added
2081 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2083 * The functions getresuid, getresgid, setresuid, and setresgid, which
2084 have long been available on Linux, are now declared in <unistd.h>
2085 and are now also available on the Hurd.
2087 * ELF thread-local storage support (TLS) now works on x86-64.
2089 * The new dynamic string token $LIB is expanded in shared library names.
2090 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2092 * Aldy Hernandez contributed complete software floating point support for
2093 PowerPC machines with no FPU.
2095 * fexecve is implemented on Linux.
2097 * The `btowc' function should work at least twice as fast due to
2098 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2100 * With approriate thread add-ons cancelable functions are now implemented
2101 in libc.so as well. No need to call the function in libpthread. This
2102 change allowed to finally disable the incorrect and expensive handling
2103 of weak definition in ld.so.
2105 * Yet more PLT entries in libc.so have been removed. We finally arrived
2106 at the bare minimum. Startup times improved appropriately.
2108 * Support for the new Linux/x86 system call interface was added. The
2109 AT_SYSINFO auxiliary vector entry is recognized and handled.
2113 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2116 * iconv (the program and the interface) now accepts empty names (excluding
2117 options like //TRANSLIT) to mean "use charset of current locale".
2119 * localedef can now transliterate characters in strings which are not in
2120 the provided charmap. The information from the input locale is used.
2122 * Prelinking support was added for ELF targets. This requires additional
2123 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2125 * Read-only stdio streams now use mmap to speed up operation by eliminating
2126 copying and buffer underflows. To use add 'm' to the mode string of
2127 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2129 * The malloc functions were completely rewritten by Wolfram Gloger based
2130 on Doug Lea's malloc-2.7.0.c.
2132 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2133 implementation of regex.
2135 * Bruno Haible upgraded the iconv and locale implementation to support
2138 * Contents of the LC_* and LANG environment variables in the CEN style are
2139 not recognized anymore. It never was used. Change by Ulrich Drepper.
2141 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2142 thread-local storage (TLS) ABI on some platforms.
2143 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2145 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2146 EUC-JISX0213, and TSCII.
2148 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2149 BSD-compatible interface for getting all network interface addresses.
2150 Implementation for IPv4 by Roland McGrath.
2152 * Loading of locale data is faster due to the introduction of a locale
2153 archive. Implemented by Roland McGrath and Ulrich Drepper.
2155 * Startup times are significantly reduced by not using exported functions
2156 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2159 * Steven Munroe contributed a port to PowerPC64/Linux.
2163 * The Hurd now uses the GNU libio implementation of stdio rather than the
2164 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2166 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2167 with the same behavior as the Linux system call of the same name.
2171 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2172 128-bit long double format.
2174 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2175 IBM1161, and IBM1162 charsets.
2177 * Andreas Jaeger contributed a port to x86-64/Linux.
2179 * Peter Bruin contributed a port to PowerPC/Hurd.
2181 * libc functions using I/O streams now can handle wide-oriented streams
2184 * optimizations in the dynamic linker. Binaries created by recent binutils
2185 versions start up quicker due to reduced time spent on relocations.
2187 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2191 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2192 asinh, atanh, j0 for the 128-bit long double format.
2194 * Bruno Haible updated all the code handling Unicode in some form to
2195 support Unicode 3.1.
2197 * Speed of regex for single-byte locales is back to previous levels.
2198 Patch by Isamu Hasegawa.
2200 * Alpha, SPARC, and IA-64 now also using floating stacks.
2202 * Startup time of internationalized applications greatly improved through
2203 iconv cache. Use iconvconfig to generate the cache file.
2204 Contributed by Ulrich Drepper.
2206 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2207 severe performance problems. Patch by David Mosberger.
2209 * The Hurd port got a lot more functionality like AIO, various stdio
2210 extensions, etc. Mainly done by Roland McGrath.
2212 * mtrace can now lookup symbols in shared libraries.
2216 * Intel's IA-64 math library is largely integrated. It provides fast and
2217 accurate implementatations for most basic and standard math functions
2218 in float, double, and long double format.
2220 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2221 and asin for the 96-bit long double format and asin, log, tan for the
2222 128-bit long double format.
2224 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2225 The basic double functions exist today. Contributed by Abraham Ziv
2226 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2227 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2229 * An asynchronous name lookup library was added. The interface is designed
2230 after POSIX AIO. The proposal was circulated beforehand to get comments.
2231 No negative ones came in. Implemented by Ulrich Drepper.
2233 * Port to S390/64bit contributed by Martin Schwidefsky
2234 <schwidefsky@de.ibm.com>.
2236 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
2237 of functions for Linux/IA-64.
2239 * The RPC code is now thread safe. Threads can now use the same service
2240 of different services at the same time. Patch by Eric Norum
2241 <eric.norum@usask.ca> with some help by Ulrich Drepper.
2243 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
2244 family of functions for Linux/S390.
2246 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
2247 of functions for Linux/x86.
2249 * Port to Linux/CRIS contributed by Axis Communications.
2253 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
2254 we can now check for namespace violations and missing declarations. The
2255 result is that almost all headers are now Unix-compliant (as defined in
2256 the upcoming XPG6). The negative side is that some programs might need
2257 corrections, too, if they depend on the incorrect form of the headers in
2258 previous versions which defined too many symbols and included too many
2261 * regex now handles multibyte character sets correctly.
2262 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
2264 * iconv (the program) does now conform to the upcoming XPG6 and handles
2265 charmaps. Instead of the charset names the path of charmaps can be
2266 provided and the conversion happens based on this data.
2267 Contributed by Ulrich Drepper.
2269 * The locale program now provides detailed information about the installed
2274 only lists the names of the supported locales
2278 provides details such as country, language, and codeset name.
2279 Contributed by Ulrich Drepper.
2283 * The gencat program now parses the input file according to the charset
2284 selected by the LC_CTYPE category. This is important for stateful
2285 character sets. To make generating catalogs easier there is a way
2286 to overwrite the charset selected by the locale: before the first
2287 message or $ quote line the catalog can contain a line like
2289 $ codeset=ISO-8859-2
2291 to select the charset (ISO-8859-2 in this case).
2293 Implemented by Shinya Hanataka and Ulrich Drepper.
2295 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2296 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2297 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2299 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2300 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2302 * The LANGUAGE environment variable is now ignored unless the locale is
2303 changed from the default "C" locale.
2305 * The usual bug fixes.
2309 * Greg McGary added runtime support for bounds checking using gcc's
2310 new -fbounded-pointers option. ix86 target is complete. PowerPC
2313 * Thorsten Kukuk added secure mode support to nscd.
2315 * The Berkeley db libraries have been removed.
2317 Related, the nss_db module is now in a separate package since it
2318 obviously requires a database library being available.
2320 * Wide character I/O streams implemented by Ulrich Drepper.
2322 * Functions from the extended socket API added by Ulrich Drepper.
2324 * Functions feenableexcept and fedisableexcept to control the
2325 behaviour of individual exceptions have been added by Andreas Jaeger.
2327 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2329 * The resolver code has been updated from bind 8.2.3-T5B which supports
2330 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2333 This change could in some situations effect backward compatibility. Since
2334 now `_res' is a thread-local instead of a global variable, modifying it
2335 in one thread does not have any effect in other threads.
2337 The resolver library was also extended to allow IPv6 as the transport
2338 protocol for the requests. This work was done by Stig Venaas.
2340 * Compatibility code for K&R C compilers has been removed from the
2341 header files. A ISO C compiler is needed to use the library
2342 (conforming to either C89 or C99 standard).
2344 * Complete rewrite of the localedef program to support multibyte character
2345 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2346 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2347 Implemented by Ulrich Drepper.
2349 Bruno Haible significantly improved the generation and use of the data
2350 structures for the wide character tables.
2352 * Plural handling in gettext implemented by Ulrich Drepper.
2354 * The utmp daemon has been removed.
2356 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2358 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2361 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2363 * POSIX barriers implemented by Kaz Kylheku.
2365 * POSIX spawn function family implemented by Ulrich Drepper.
2367 * POSIX spinlocks are now available.
2369 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2371 * the configure option --enable-kernel=X.Y.Z allows to strip out
2372 compatibility for kernel versions before X.Y.Z. This is currently only
2373 implemented for Linux.
2375 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2376 field sin6_scope_id. This means that all programs using IPv6 should be
2377 recompiled. Don't expect binary compatibility with previous glibc
2380 * various conversion modules for IBM character sets contributed by
2383 * IA-64 port by Jes Sorensen and HJ Lu.
2397 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2399 * New xdr functions are added; some rpc functions are now 64bit clean.
2401 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2403 * Fixed known incompatibilities with glibc 2.0.
2405 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2407 * Optimized a number of functions (especially the ELF dynamic loader).
2409 * Update timezone data files.
2411 * lots of charmaps corrections
2413 * some new locale definitions and charmaps
2418 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2419 conform to POSIX member type requirements. Symbol versions have been
2420 adjusted as needed within the library, and for direct use by applications,
2421 but there is potential for problems if third-party libraries use
2422 struct timeval as part of their interface. This does not present
2423 a problem for X and other "essential" system libraries.
2425 * An additional locale model to support C++ Standard Library locale
2426 model and probably more was implemented by Ulrich Drepper.
2428 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2431 * Miles Bader provided the `argp' function family to support hierachical
2432 command line argument parsing, layered on top of getopt.
2434 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2436 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2439 * scanf recognizes the %a and %A format for scanning floating point numbers.
2441 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2442 information and interfaces for the available integer types.
2444 * about 130 new math functions were added to implement the ISO C9x math
2447 * the new header <complex.h> contains definitions of the complex math
2448 functions from ISO C 9X.
2450 * the new header <tgmath.h> defines generic macros to use complex or
2451 real valued functions.
2453 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2455 * Andreas Jaeger provided a test suite for the math library.
2457 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2459 * Ulrich Drepper added character set conversion functions (iconv).
2461 * Optimized string functions have been added.
2463 * The localedata addon is now part of glibc.
2465 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2467 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2468 daemon for NSS (nscd).
2470 Missing a better place here are some numbers on improvements. Under
2471 Linux 2.1.125 un-tar-ing the kernel sources takes
2475 using local files 12.19s 6.88s 22.91s
2477 using NIS 13.92s 8.91s 26.34s
2479 using NIS & nscd 10.37s 7.34s 25.30s
2481 using NIS+ 27.57s 30.37s 640.46s
2483 using NIS+ & nscd 10.25s 7.83s 26.51s
2485 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2487 Keep in mind that non-namelookup related operations dominate above times.
2488 It was just a common complain that using NIS+ unpacking the kernel is
2491 [1] The old nscd implementation is not available anymore since it was
2492 distributed with glibc up to version 2.0.98 and thus is now replaced.
2494 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2496 * Mark Kettenis provided a Hesiod NSS module.
2498 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2499 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2501 * rcmd can now handle netgroups (Dick Streefland).
2503 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2506 * Support for the IPv6 protocol has been added to the socket API, as per the
2507 latest draft standards.
2509 * Support for Linux 2.2 has been added.
2511 * Interface changes relative to the latest 2.0.x release:
2512 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2513 addseverity NEW: Unix98
2514 alphasort64 NEW: LFS
2515 argp_err_exit_status NEW: argp, GNU ext
2516 argp_error NEW: argp, GNU ext
2517 argp_failure NEW: argp, GNU ext
2518 argp_help NEW: argp, GNU ext
2519 argp_parse NEW: argp, GNU ext
2520 argp_program_bug_address NEW: argp, GNU ext
2521 argp_program_version NEW: argp, GNU ext
2522 argp_program_version_hook NEW: argp, GNU ext
2523 argp_state_help NEW: argp, GNU ext
2524 argp_usage NEW: argp, GNU ext
2525 authdes_create NEW: Secure RPC
2526 authdes_getucred NEW: Secure RPC
2527 authdes_pk_create NEW: Secure RPC
2528 backtrace NEW: GNU ext.
2529 backtrace_symbols NEW: GNU ext.
2530 backtrace_symbols_fd NEW: GNU ext.
2532 cacosf NEW: ISO C 9x
2533 cacosh NEW: ISO C 9x
2534 cacoshf NEW: ISO C 9x
2535 cacoshl NEW: ISO C 9x
2536 cacosl NEW: ISO C 9x
2543 casinf NEW: ISO C 9x
2544 casinh NEW: ISO C 9x
2545 casinhf NEW: ISO C 9x
2546 casinhl NEW: ISO C 9x
2547 casinl NEW: ISO C 9x
2549 catanf NEW: ISO C 9x
2550 catanh NEW: ISO C 9x
2551 catanhf NEW: ISO C 9x
2552 catanhl NEW: ISO C 9x
2553 catanl NEW: ISO C 9x
2554 cbc_crypt NEW: Secure RPC
2558 ccoshf NEW: ISO C 9x
2559 ccoshl NEW: ISO C 9x
2565 cimagf NEW: ISO C 9x
2566 cimagl NEW: ISO C 9x
2567 clearerr_locked REMOVED
2568 clntunix_create NEW: sunrpc ext
2570 clog10 NEW: ISO C 9x
2571 clog10f NEW: ISO C 9x
2572 clog10l NEW: ISO C 9x
2582 cprojf NEW: ISO C 9x
2583 cprojl NEW: ISO C 9x
2585 crealf NEW: ISO C 9x
2586 creall NEW: ISO C 9x
2591 csinhf NEW: ISO C 9x
2592 csinhl NEW: ISO C 9x
2595 csqrtf NEW: ISO C 9x
2596 csqrtl NEW: ISO C 9x
2600 ctanhf NEW: ISO C 9x
2601 ctanhl NEW: ISO C 9x
2603 des_setparity NEW: Secure RPC
2604 ecb_crypt NEW: Secure RPC
2605 endutxent NEW: Unix98
2607 exp10f NEW: ISO C 9x
2608 exp10l NEW: ISO C 9x
2612 fattach NEW: STREAMS
2613 fdetach NEW: STREAMS
2617 feclearexcept NEW: ISO C 9x
2618 fegetenv NEW: ISO C 9x
2619 fegetexceptflag NEW: ISO C 9x
2620 fegetround NEW: ISO C 9x
2621 feholdexcept NEW: ISO C 9x
2623 feraiseexcept NEW: ISO C 9x
2624 ferror_locked REMOVED
2625 fesetenv NEW: ISO C 9x
2626 fesetexceptflag NEW: ISO C 9x
2627 fesetround NEW: ISO C 9x
2628 fetestexcept NEW: ISO C 9x
2629 feupdateenv NEW: ISO C 9x
2630 fflush_locked REMOVED
2634 fgets_unlocked NEW: GNU ext.
2635 fileno_locked REMOVED
2647 fputc_locked REMOVED
2648 fputs_unlocked NEW: GNU ext.
2649 fread_unlocked NEW: GNU ext.
2654 fstatvfs NEW: Unix98
2658 ftruncate64 NEW: LFS
2660 fwrite_unlocked NEW: GNU ext.
2661 gai_strerror NEW: IPv6
2665 getchar_locked REMOVED
2667 getdate_err NEW: Unix98
2668 getdate_r NEW: GNU ext.
2670 getnameinfo NEW: IPv6
2671 getnetname NEW: Secure RPC
2672 getpmsg NEW: STREAMS
2673 getpt NEW: Unix98 PTY
2674 getrlimit64 NEW: LFS
2675 getutxent NEW: Unix98
2676 getutxid NEW: Unix98
2677 getutxline NEW: Unix98
2678 glob64 NEW: GNU ext.
2679 globfree64 NEW: GNU ext.
2680 gnu_get_libc_release NEW: GNU ext.
2681 gnu_get_libc_version NEW: GNU ext.
2682 grantpt NEW: Unix98 PTY
2683 host2netname NEW: Secure RPC
2685 iconv_close NEW: iconv
2686 iconv_open NEW: iconv
2687 if_freenameindex NEW: IPv6
2688 if_indextoname NEW: IPv6
2689 if_nameindex NEW: IPv6
2690 if_nametoindex NEW: IPv6
2691 in6addr_any NEW: IPv6
2692 in6addr_loopback NEW: IPv6
2693 inet6_isipv4mapped NEW: IPv6
2694 isastream NEW: STREAMS
2695 iswblank NEW: GNU ext.
2696 key_decryptsession NEW: Secure RPC
2697 key_decryptsession_pk NEW: Secure RPC
2698 key_encryptsession NEW: Secure RPC
2699 key_encryptsession_pk NEW: Secure RPC
2700 key_gendes NEW: Secure RPC
2701 key_get_conv NEW: Secure RPC
2702 key_secretkey_is_set NEW: Secure RPC
2703 key_setnet NEW: Secure RPC
2704 key_setsecret NEW: Secure RPC
2705 llrint NEW: ISO C 9x
2706 llrintf NEW: ISO C 9x
2707 llrintl NEW: ISO C 9x
2708 llround NEW: ISO C 9x
2709 llroundf NEW: ISO C 9x
2710 llroundl NEW: ISO C 9x
2715 lrintf NEW: ISO C 9x
2716 lrintl NEW: ISO C 9x
2717 lround NEW: ISO C 9x
2718 lroundf NEW: ISO C 9x
2719 lroundl NEW: ISO C 9x
2721 makecontext NEW: Unix98
2722 mempcpy NEW: GNU ext.
2725 modify_ldt NEW: kernel
2729 nearbyint NEW: ISO C 9x
2730 nearbyintf NEW: ISO C 9x
2731 nearbyintl NEW: ISO C 9x
2732 netname2host NEW: Secure RPC
2733 netname2user NEW: Secure RPC
2734 nexttoward NEW: ISO C 9x
2735 nexttowardf NEW: ISO C 9x
2736 nexttowardl NEW: ISO C 9x
2740 passwd2des NEW: Secure RPC
2742 pow10f NEW: GNU ext.
2743 pow10l NEW: GNU ext.
2746 printf_size NEW: GNU ext.
2747 printf_size_info NEW: GNU ext.
2748 profil_counter REMOVED
2749 pthread_mutexattr_getkind_np REPLACED
2750 pthread_mutexattr_setkind_np REPLACED
2751 ptsname NEW: Unix98 PTY
2752 ptsname_r NEW: Unix98 PTY
2754 putchar_locked REMOVED
2755 putgrent NEW: GNU ext.
2757 putpmsg NEW: STREAMS
2758 pututxline NEW: Unix98
2762 readdir64_r NEW: LFS
2763 remquo NEW: ISO C 9x
2764 remquof NEW: ISO C 9x
2765 remquol NEW: ISO C 9x
2767 roundf NEW: ISO C 9x
2768 roundl NEW: ISO C 9x
2770 scalbln NEW: ISO C 9x
2771 scalblnf NEW: ISO C 9x
2772 scalblnl NEW: ISO C 9x
2774 sendfile NEW: kernel
2775 setcontext NEW: Unix98
2776 setrlimit64 NEW: LFS
2777 setutxent NEW: Unix98
2779 sigignore NEW: Unix98
2780 sigqueue NEW: POSIX.1b
2781 sigrelse NEW: Unix98
2782 sigset NEW: POSIX.1b
2783 sigtimedwait NEW: POSIX.1b
2784 sigwaitinfo NEW: POSIX.1b
2785 sincos NEW: GNU ext.
2786 sincosf NEW: GNU ext.
2787 sincosl NEW: GNU ext.
2791 strcasestr NEW: GNU ext.
2792 strtoimax NEW: ISO C 9x
2793 strtoumax NEW: ISO C 9x
2794 strverscmp NEW: GNU ext.
2795 svcauthdes_stats NEW: Secure RPC
2796 svcunix_create NEW: sunrpc etx
2797 svcunixfd_create NEW: sunrpc ext
2798 swapcontext NEW: Unix98
2799 tcgetsid NEW: Unix98 PTY
2800 tdestroy NEW: GNU ext.
2801 tgamma NEW: ISO C 9x
2802 tgammaf NEW: ISO C 9x
2803 tgammal NEW: ISO C 9x
2807 truncf NEW: ISO C 9x
2808 truncl NEW: ISO C 9x
2810 unlockpt NEW: Unix98 PTY
2811 updwtmpx NEW: Unix98
2812 user2netname NEW: Secure RPC
2813 utmpxname NEW: Unix98
2814 versionsort NEW: GNU ext.
2815 versionsort64 NEW: GNU ext.
2817 wcscasecmp NEW: GNU ext.
2818 wcsncasecmp NEW: GNU ext.
2819 wcsnlen NEW: GNU ext.
2820 wcstoimax NEW: ISO C 9x
2821 wcstoll NEW: ISO C 9x
2822 wcstoull NEW: ISO C 9x
2823 wcstoumax NEW: ISO C 9x
2825 wordexp NEW: POSIX.2
2826 wordfree NEW: POSIX.2
2827 write_profiling REMOVED
2828 xdecrypt NEW: Secure RPC
2829 xdr_authdes_cred NEW: Secure RPC
2830 xdr_authdes_verf NEW: Secure RPC
2831 xdr_cryptkeyarg NEW: Secure RPC
2832 xdr_cryptkeyarg2 NEW: Secure RPC
2833 xdr_cryptkeyres NEW: Secure RPC
2834 xdr_getcredres NEW: Secure RPC
2835 xdr_key_netstarg NEW: Secure RPC
2836 xdr_key_netstres NEW: Secure RPC
2837 xdr_keybuf NEW: Secure RPC
2838 xdr_keystatus NEW: Secure RPC
2839 xdr_netnamestr NEW: Secure RPC
2840 xdr_sizeof NEW: Secure RPC
2841 xdr_unixcred NEW: sunrpc ext
2842 xencrypt NEW: Secure RPC
2843 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2854 * inet_ntoa is thread-safe
2856 * updwtmp is moved from libutil to libc
2858 * rewrite of cbrt function
2860 * update of timezone data
2874 * add atoll function
2876 * fix complex problems in Berkeley DB code
2878 * fix math functions
2882 * fixed lots of header problems (especially Linux/GNU specific)
2884 * dynamic loader preserves all registers
2886 * Roland McGrath provided support for handling of auxiliary objects in
2887 the ELF dynamic loader.
2889 * support for parallel builds is improved
2893 * GNU extensions are no longer declared by default. To enable them you
2894 must define the macro `_GNU_SOURCE' in your program or compile with
2897 * The library has changed from using GNU ld symbol aliases to using weak
2898 symbols where available. The ELF object file format supports weak
2899 symbols; GNU ld also supports weak symbols in the a.out format. (There
2900 is also now support for other GNU ld extensions in ELF. Use the
2901 `--with-elf' option to configure to indicate you have ELF, and
2902 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2903 of many files which contained only symbol aliases, reducing the size of
2904 the source and the compiled library; many other files were renamed to
2905 less cryptic names previously occupied by the symbol alias files.
2906 There is a new header file <elf.h> for programs which operate on
2907 files in the ELF format.
2909 * Converted to Autoconf version 2, so `configure' has more options.
2910 Run `configure --help' to see the details.
2912 * The library can now be configured to build profiling, highly-optimized
2913 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2914 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2915 `configure' enable building these extra libraries. The shared library is
2916 built by default when using both ELF and GNU ld. When shared libraries
2917 are enabled, the new library `-ldl' is available for arbitrary run-time
2918 loading of shared objects; its interface is defined in <dlfcn.h>. The
2919 new header file <link.h> gives access to the internals of the run-time
2920 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2921 application of same name on other systems and it provides information
2922 about dynamically linked binaries.
2924 * The C library now provides the run-time support code for profiling
2925 executables compiled with `-pg'. Programs can control the profiling code
2926 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2927 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2928 the support for this file format was contributed by David Mosberger-Tang.
2930 * The math code has been replaced with a math library based on fdlibm from
2931 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2932 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2933 functions. The math functions now reside in a separate library, so
2934 programs using them will need to use `-lm' their linking commands.
2936 * John C. Bowman contributed optimized ix87 assembler inline functions.
2938 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2939 mechanism similar to that found in Solaris 2. This is now used for the
2940 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2941 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2942 file controls what services are used for each individual database. This
2943 works by loading shared libraries with names specified in `nsswitch.conf',
2944 so service modules can be changed or added at any time without even
2945 relinking any program. Currently there are the file, db, and NIS based
2946 NSS services available.
2948 * The new functions `strtoq' and `strtouq' parse integer values from
2949 strings, like `strtol' and `strtoul', but they return `long long int' and
2950 `unsigned long long int' values, respectively (64-bit quantities).
2952 * The new functions `strtof' and `strtold' parse floating-point values from
2953 strings, like `strtod', but they return `float' and `long double' values,
2954 respectively (on some machines `double' and `long double' are the same).
2956 * Ulrich Drepper has contributed new implementations of the floating-point
2957 printing and reading code used in the `printf' family of functions and
2958 `strtod', `strtof', and `strtold'. These new functions are perfectly
2959 accurate, and much faster than the old ones.
2961 * The implementation of the POSIX locale model was completely rewritten by
2962 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2963 to compile the POSIX locale definition.
2965 * The former dummy implementations of the strcoll and strxfrm function are
2966 now replaced by fully functional code contributed by Ulrich Drepper. The
2967 collation information comes from the POSIX locale definitions.
2969 * The new header <langinfo.h> defines an interface for accessing
2970 various locale-dependent data (using the locale chosen with `setlocale').
2972 * Ulrich Drepper has contributed a new suite of functions for operation on
2973 wide-character and multibyte-character strings, in <wchar.h>;
2974 and classification and case conversion of wide characters, in <wctype.h>.
2975 These new functions are conforming to the ISO C, Amendement 1 specification.
2977 * There is now a second implementation of the standard I/O library available.
2978 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2979 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2981 * You can now use positional parameter specifications in format strings
2982 for the `printf' and `scanf' families of functions. For example,
2983 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2984 ``Number 6, Mr Jones''. This is mainly useful when providing different
2985 format strings for different languages, whose grammars may dictate
2986 different orderings of the values being printed. To support this
2987 feature, the interface for `register_printf_handler' has changed; see
2988 the header file <printf.h> for details.
2990 * The `printf' and `scanf' families of functions now understand a new
2991 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2992 to group numbers as indicated by the locale; for `scanf' and friends, this
2993 says to accept as valid only a number with all the proper grouping
2994 separators in the right places. In the default "C" locale, numbers are
2995 not grouped; but locales for specific countries will define the usual
2996 conventions (i.e. separate thousands with `,' in the US locale).
2998 * The pgrp functions have been regularized, slightly incompatibly but much
2999 less confusingly. The core functions are now `getpgid' and `setpgid',
3000 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3001 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3002 provided for compatibility. There is no longer an incompatible `getpgrp'
3003 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3005 * The new header file <fts.h> and suite of functions simplify programs that
3006 operate on directory trees. This code comes from 4.4 BSD.
3008 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3009 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3010 NSS scheme used in glibc.
3012 * There is a new malloc debugging hook `__memalign_hook'.
3014 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3015 `unsigned int' in <sys/types.h>. These are for compatibility only and
3016 their use is discouraged.
3018 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3019 done differently, so that it works even without GNU ld.
3021 * New function `euidaccess' checks allowed access to a file like `access',
3022 but using the effective IDs instead of the real IDs.
3024 * The time zone data files have been updated for the latest and greatest
3025 local time conventions of the countries of the world.
3027 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3030 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3031 for formatting floating-point numbers. They are provided only for
3032 compatibility; new programs should use `sprintf' instead. There are
3033 also equivalent function for the `long double' floating-point type and
3034 all functions also exist in a reentrant form.
3036 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3037 functions for maintaining the login-record files (primarily of use to
3038 system programs such as `login'), and convenient functions for
3039 allocating and initializing a pseudo-terminal (pty) device.
3041 * Ulrich Drepper has contributed new support for System V style
3042 shared memory and IPC on systems that support it.
3044 * Ulrich Drepper has contributed several miscellaneous new functions found
3045 in System V: The `hsearch' family of functions provide an effective
3046 implementation of hash tables; `a64l' and `l64a' provide a very simple
3047 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3050 * Ulrich Drepper has contributed new reentrant counterparts for the
3051 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3053 * Ulrich Drepper has contributed new, highly-optimized versions of several
3054 string functions for the i486/Pentium family of processors.
3056 * Ulrich Drepper has updated the Linux-specific code, based largely
3057 on work done in Hongjiu Lu's version of GNU libc for Linux.
3058 The GNU library now supports Linux versions 2.0.10 and later,
3059 using the ELF object file format (i[3456]86-*-linux).
3061 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3063 * David Mosberger-Tang and Richard Henderson have ported the C library
3064 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3065 dynamic linking support for ELF/Alpha.
3067 * Richard Henderson contributed several Alpha optimized assembler function
3068 for arithmetic and string handling.
3070 * Ulrich Drepper has contributed a new set of message catalog functions to
3071 support multiple languages using the <libintl.h> interface, for use with
3072 his new package GNU gettext. Translation volunteers have contributed
3073 catalogs of the library's messages in Spanish, German, and Korean.
3075 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3076 program and the `catgets' function for reading the catalog files it
3077 creates. (The <libintl.h> interface is preferred; we include the
3078 <nl_types.h> interface using `catgets' only for source compatibility with
3079 programs already written to use it.)
3081 * New header file <values.h> gives SVID-compatible names for <limits.h>
3084 * Various new macros, declarations, and small header files for compatibility
3087 * New function `group_member' is a convenient way to check if a process has
3088 a given effective group ID.
3090 * When using GCC 2.7 and later, the socket functions are now declared in a
3091 special way so that passing an argument of type `struct sockaddr_in *',
3092 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3093 `struct sockaddr *' type, does not generate a type-clash warning.
3095 * New function `error' declared in header file <error.h> is a convenient
3096 function for printing error messages and optionally exiting; this is the
3097 canonical function used in GNU programs. The new functions `err', `warn',
3098 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3099 doing the same thing.
3101 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3102 POSIX.2 `glob' function to do ~ and {...} expansion.
3104 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3105 `clearenv' which is used in POSIX.9 is also available.
3107 * New function `getsid' returns session ID number on systems that support it.
3109 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3110 files <db.h> and <mpool.h> provide a rich set of functions for several
3111 types of simple databases stored in memory and in files, and <ndbm.h> is
3112 an old `ndbm'-compatible interface using the `db' functions. Link with
3113 `-ldb' to get these functions.
3115 * New macro `strdupa' copies a string like `strdup', but uses local stack
3116 space from `alloca' instead of dynamic heap space from `malloc'.
3118 * New function `strnlen' is like `strlen' but searches only a given maximum
3119 number of characters for the null terminator. `stpncpy', `strndup' and
3120 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3123 * New function `statfs' in header <sys/statfs.h>.
3125 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3126 provide convenient functions for operating on blocks of null-terminated
3129 * A new suite of functions in <utmp.h> handle all the details of reading
3130 and writing the utmp file.
3132 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3135 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3136 completely POSIX compliant and also implemented the extended functionality
3137 to handle alternate digit representation and alternate era date formats.
3139 * Ulrich Drepper provided an implementation of the `strptime' function
3140 defined in XPG4.2 which transforms a string into a `struct tm' value.
3142 * Paul Eggert provided the tzselect shell script as part of the timezone
3143 code. The shell script makes it easy to select the correct timezone
3146 * The implementation of the malloc family of functions is completely replaced
3147 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3148 The implementation uses the mmap function (if available) and it is
3149 optimized for the use in multi threaded programs.
3151 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3152 functions. This new functionality is usable by specifying a special
3153 salt string and it is compatible with implementation on *BSD systems.
3155 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3156 `getsubopt' to handle second level command line options, `bsd_signal'
3157 to access BSD style `signal' functionality, the obsolete `regexp' style
3160 * the `lchown' function is available on system which support this
3163 * The implementation of the shadow password handling function was contributed
3166 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3168 * POSIX.1g support was added. The <sys/select.h> header is available,
3169 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3170 implementation of `getaddrinfo'.
3174 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3176 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3177 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3179 * The new function `daemon' from 4.4 BSD is useful for server programs that
3180 want to put themselves in the background.
3182 * Joel Sherrill has contributed support for several standalone boards that
3183 run without an operating system.
3185 * `printf', `scanf' and friends now accept a `q' type modifier for long
3186 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3188 * All of the code taken from BSD (notably most of the math and networking
3189 routines) has been updated from the BSD 4.4-Lite release.
3191 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3193 * The new functions `getdomainname' and `setdomainname' fetch or change the
3194 YP/NIS domain name. These are system calls which exist on systems which
3197 * The time zone data files have been updated for the latest international
3200 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3201 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3205 * The C library now includes support for Sun RPC, from Sun's free
3206 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3207 are included. (There is still no support for YP.)
3209 * Tom Quinn has contributed a port of the C library to SGI machines running
3210 Irix 4 (mips-sgi-irix4).
3212 * The new `lockf' function is a simplified interface to the locking
3213 facilities of `fcntl', included for compatibility.
3215 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3217 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3219 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3222 * The error message printed by `assert' for a failed assertion now includes
3223 the name of the program (if using GNU ld) and the name of the calling
3224 function (with versions of GCC that support this).
3226 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3228 * The library now includes the <sys/mman.h> header file and memory
3229 management functions `mmap', `munmap', `mprotect', `msync', and
3230 `madvise', on systems that support those facilities.
3232 * The interface for `mcheck' has changed slightly: the function called to
3233 abort the program when an allocation inconsistency is detected now takes
3234 an argument that indicates the type of failure. The new function
3235 `mprobe' lets you request a consistency check for a particular block at
3236 any time (checks are normally done only when you call `free' or `realloc'
3239 * It is now possible to easily cross-compile the C library, building on one
3240 system a library to run on another machine and/or operating system. All
3241 you need to do is set the variable `HOST_CC' in `configparms' to the
3242 native compiler for programs to run on the machine you are building on (a
3243 few generator programs are used on Unix systems); set `CC' to the
3246 * The new function `fexecve' (only implemented on the GNU system) executes
3247 a program file given a file descriptor already open on the file.
3251 * Brendan Kehoe has contributed most of a port to the DEC Alpha
3252 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
3254 * You can set the variable `libprefix' in `configparms' to specify a prefix
3255 to be prepended to installed library files; this makes it easy to install
3256 the GNU C library to be linked as `-lgnuc' or whatever.
3258 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
3259 copies a limited number of characters from a string, and returns the
3260 address of the last character written.
3262 * You no longer need to check for whether the installed `stddef.h' is
3263 compatible with the GNU C library. configure now checks for you.
3265 * You can now define a per-stream `fileno' function to convert the
3266 stream's cookie into an integral file descriptor.
3268 * ``malloc (0)'' no longer returns a null pointer. Instead, it
3269 allocates zero bytes of storage, and returns a unique pointer which
3270 you can pass to `realloc' or `free'. The behavior is undefined if
3271 you dereference this pointer.
3273 * The C library now runs on Sony NEWS m68k machines running either
3274 NewsOS 3 or NewsOS 4.
3276 * The new `syscall' function is a system-dependent primitive function
3277 for invoking system calls. It has the canonical behavior on Unix
3278 systems, including unreliable return values for some calls (such as
3279 `pipe', `fork' and `getppid').
3281 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
3282 to `EAGAIN', which is the preferred name. On systems whose kernels
3283 use two distinct codes, the C library now translates EWOULDBLOCK to
3284 EAGAIN in every system call function.
3288 * The GNU C Library Reference Manual is now distributed with the library.
3289 `make dvi' will produce a DVI file of the printed manual.
3290 `make info' will produce Info files that you can read on line using C-h i
3291 in Emacs or the `info' program.
3292 Please send comments on the manual to bug-glibc-manual@gnu.org.
3294 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3296 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3298 * Jason Merrill has contributed a port to the Sequent Symmetry running
3299 Dynix version 3 (i386-sequent-dynix).
3301 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3302 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3304 * New function `memory_warnings' lets you arrange to get warnings when
3305 malloc is running out of memory to allocate, like Emacs gives you.
3307 * The C library now contains the relocating allocator used in Emacs 19 for
3308 its editing buffers. This allocator (ralloc) minimizes allocation
3309 overhead and fragmentation by moving allocated regions around whenever it
3310 needs to. You always refer to a ralloc'd region with a "handle" (a
3311 pointer to a pointer--an object of type `void **').
3313 * There is a new `printf' format: `%m' gives you the string corresponding
3314 to the error code in `errno'.
3316 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3317 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3318 pass, the `a' modifier says to fill in a `char **' you pass with a
3321 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3322 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3323 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3325 * `mkstemp' is a traditional Unix function to atomically create and open a
3326 uniquely-named temporary file.
3330 * The standard location for the file that says what the local timezone is
3331 has changed again. It is now `/usr/local/etc/localtime' (or more
3332 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3334 * The distribution no longer contains any files with names longer than 14
3337 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3338 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3340 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3344 * The configuration process has changed quite a bit. The `configure'
3345 script is now used just like the configuration scripts for other GNU
3346 packages. The `sysdeps' directory hierarchy is much rearranged.
3347 The file `INSTALL' explains the new scheme in detail.
3349 * The header files no longer need to be processed into ANSI C and
3350 traditional C versions. There is just one set of files to install, and
3351 it will work with ANSI or old C compilers (including `gcc -traditional').
3353 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3354 MIPS DECStation running Ultrix 4.
3356 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3357 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3358 made itself into a shared library.
3360 * Yet further improved support for the i386, running 4.3 BSD-like systems
3361 (such as Mach 3 with the Unix single-server), or System V.
3363 * New function `strncasecmp' to do case-insensitive string comparison
3364 with limited length.
3366 * New function `strsep' is a reentrant alternative to `strtok'.
3368 * New functions `scandir' and `alphasort' for searching directories.
3370 * New function `setenv' is a better interface to `putenv'.
3372 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3373 function for traversing a directory tree.
3375 * The GNU obstack package is now also part of the C library.
3376 The new function `open_obstack_stream' creates a stdio stream that
3377 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3378 formatted output directly to an obstack.
3380 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3381 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3383 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3385 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3386 things to your strings.
3388 * There are some new test programs: test-fseek, testmb, and testrand.
3390 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3391 These ports are not finished, but are a good starting place for really
3392 supporting those systems.
3394 * `/etc/localtime' is now the standard location for the file that says what
3395 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3396 This follows the general principle that `/etc' is the place for all local
3397 configuration files.
3399 * The C library header files now use `extern "C"' when used by the C++
3400 compiler, so the C library should now work with C++ code.
3402 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3403 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3406 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3407 function which uses the `merge sort' algorithm, and is said to be
3408 significantly faster than the old GNU `qsort' function. Merge sort is
3409 now the standard `qsort' function. The new algorithm can require a lot
3410 of temporary storage; so, the old sorting function is called when the
3411 required storage is not available.
3413 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3414 provides the Unix `crypt' function, plus some other entry points.
3416 * The code and header files taken from 4.4 BSD have been updated with the
3417 latest files released from Berkeley.
3419 ----------------------------------------------------------------------
3420 Copyright information:
3422 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3424 Permission is granted to anyone to make or distribute verbatim copies
3425 of this document as received, in any medium, provided that the
3426 copyright notice and this permission notice are preserved,
3427 thus giving the recipient permission to redistribute in turn.
3429 Permission is granted to distribute modified versions
3430 of this document, or of portions of it,
3431 under the above conditions, provided also that they
3432 carry prominent notices stating who last changed them.
3435 version-control: never