1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2017 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.
12 [Add new features here]
14 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin and tan
15 with FMA, contributed by Arjan van de Ven and H.J. Lu from Intel.
17 Deprecated and removed features, and other changes affecting compatibility:
19 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
20 defined by <sys/ptrace.h>.
22 Changes to build and runtime requirements:
24 [Add changes to build and runtime requirements here]
26 Security related changes:
28 CVE-2009-5064: The ldd script would sometimes run the program under
29 examination directly, without preventing code execution through the
30 dynamic linker. (The glibc project disputes that this is a security
31 vulnerability; only trusted binaries must be examined using the ldd
34 The following bugs are resolved with this release:
36 [The release manager will add the list generated by
37 scripts/list-fixed-bugs.py just before the release.]
44 * A per-thread cache has been added to malloc. Access to the cache requires
45 no locks and therefore significantly accelerates the fast path to allocate
46 and free small amounts of memory. Refilling an empty cache requires locking
47 the underlying arena. Performance measurements show significant gains in a
48 wide variety of user workloads. Workloads were captured using a special
49 instrumented malloc and analyzed with a malloc simulator. Contributed by
50 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
52 * Unicode 10.0.0 Support: Character encoding, character type info, and
53 transliteration tables are all updated to Unicode 10.0.0, using
54 generator scripts contributed by Mike FABIAN (Red Hat).
55 These updates cause user visible changes, especially the changes in
56 wcwidth for many emoji characters cause problems when emoji sequences
57 are rendered with pango, see for example:
58 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
60 * Collation of Hungarian has been overhauled and is now consistent with "The
61 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
64 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
66 - The GNU C Library will now detect when /etc/resolv.conf has been
67 modified and reload the changed configuration. The new resolver option
68 “no-reload” (RES_NORELOAD) disables this behavior.
70 - The GNU C Library now supports an arbitrary number of search domains
71 (configured using the “search” directive in /etc/resolv.conf);
72 previously, there was a hard limit of six domains. For backward
73 compatibility, applications that directly modify the ‘_res’ global
74 object are still limited to six search domains.
76 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
77 Library will now randomly pick a name server from the configuration as a
78 starting point. (Previously, the second name server was always used.)
80 * The tunables feature is now enabled by default. This allows users to tweak
81 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
83 * New function reallocarray, which resizes an allocated block (like realloc)
84 to the product of two sizes, with a guaranteed clean failure upon integer
85 overflow in the multiplication. Originally from OpenBSD, contributed by
86 Dennis Wölfing and Rüdiger Sonderfeld.
88 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
89 These are extended versions of preadv and pwritev, respectively, taking an
90 additional flags argument. The set of supported flags depends on the
91 running kernel; full support currently requires kernel 4.7 or later.
93 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
94 create a new session ID for the spawned process. This feature is
95 scheduled to be added to the next major revision of POSIX; for the time
96 being, it is available under _GNU_SOURCE.
98 * errno.h is now safe to use from C-preprocessed assembly language on all
99 supported operating systems. In this context, it will only define the
100 Exxxx constants, as preprocessor macros expanding to integer literals.
102 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
103 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
104 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
105 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
107 To compile programs that use this feature, the compiler must support
108 128-bit floating point with the type name _Float128 (as defined by TS
109 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
110 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
111 must be defined to make the new interfaces visible.
113 The new functions and macros correspond to those present for other
114 floating-point types (except for a few obsolescent interfaces not
115 supported for the new type), with F128 or f128 suffixes; for example,
116 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
117 printf or scanf formats for the new type; the strfromf128 and strtof128
118 interfaces should be used instead.
120 Deprecated and removed features, and other changes affecting compatibility:
122 * The synchronization that pthread_spin_unlock performs has been changed to
123 now be equivalent to a C11 atomic store with release memory order to the
124 spin lock's memory location. Previously, several (but not all)
125 architectures used stronger synchronization (e.g., containing what is
126 often called a full barrier). This change can improve performance, but
127 may affect odd fringe uses of spin locks that depend on the previous
128 behavior (e.g., using spin locks as atomic variables to try to implement
129 Dekker's mutual exclusion algorithm).
131 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
134 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
135 will only be built and installed when the GNU C Library is configured with
136 --enable-obsolete-rpc. This allows alternative RPC implementations, such
137 as TIRPC or rpcsvc-proto, to be used.
139 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
140 libnss_compat, are deprecated, and will not be built or installed by
143 The NIS(+) support library, libnsl, is also deprecated. By default, a
144 compatibility shared library will be built and installed, but not headers
145 or development libraries. Only a few NIS-related programs require this
146 library. (In particular, the GNU C Library has never required programs
147 that use 'gethostbyname' to be linked with libnsl.)
149 Replacement implementations based on TIRPC, which additionally support
150 IPv6, are available from <https://github.com/thkukuk/>. The configure
151 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
152 name service modules, to be built and installed.
154 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
155 support is enabled, the configured recursive resolver must support EDNS.
156 (Responding to EDNS-enabled queries with responses which are not
157 EDNS-enabled is fine, but FORMERR responses are not.)
159 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
160 servers have not supported this opcode for a long time.
162 * The _res_opcodes variable has been removed from libresolv. It had been
163 exported by accident.
165 * <string.h> no longer includes inline versions of any string functions,
166 as this kind of optimization is better done by the compiler. The macros
167 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
169 * The nonstandard header <xlocale.h> has been removed. Most programs should
170 use <locale.h> instead. If you have a specific need for the definition of
171 locale_t with no other declarations, please contact
172 libc-alpha@sourceware.org and explain.
174 * The obsolete header <sys/ultrasound.h> has been removed.
176 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
178 * The obsolete function cfree has been removed. Applications should use
181 * The stack_t type no longer has the name struct sigaltstack. This changes
182 the C++ name mangling for interfaces involving this type.
184 * The ucontext_t type no longer has the name struct ucontext. This changes
185 the C++ name mangling for interfaces involving this type.
187 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
188 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
189 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
190 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
191 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
192 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
193 fpregset_t type no longer has the name struct fpu. This changes the C++
194 name mangling for interfaces involving those types.
196 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
197 synced with the kernel:
199 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
200 are not supported on this architecture and have been removed.
202 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
203 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
204 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
206 Programs that assume the GET/SETREGS ptrace requests are universally
207 available will now fail to build, instead of malfunctioning at runtime.
209 Changes to build and runtime requirements:
211 * Linux kernel 3.2 or later is required at runtime, on all architectures
212 supported by that kernel. (This is a change from version 2.25 only for
215 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
217 * On most architectures, GCC 4.9 or later is required to build the GNU C
218 Library. On powerpc64le, GCC 6.2 or later is required.
220 Older GCC versions and non-GNU compilers are still supported when
221 compiling programs that use the GNU C Library. (We do not know exactly
222 how old, and some GNU extensions to C may be _de facto_ required. If you
223 are interested in helping us make this statement less vague, please
224 contact libc-alpha@sourceware.org.)
226 Security related changes:
228 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
229 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
231 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
232 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
234 * Avoid printing a backtrace from the __stack_chk_fail function since it is
235 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
238 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
239 fixed (CVE-2017-12133).
241 The following bugs are resolved with this release:
243 [984] network: Respond to changed resolv.conf in gethostbyname
244 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
245 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
247 [12189] libc: __stack_chk_fail should not attempt a backtrace
249 [14096] time: Race condition on timezone/tst-timezone.out
250 [14172] localedata: az_IR: new locale
251 [14995] build: glibc fails to build if gold is the default linker, even if
253 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
254 [16637] network: inet_pton function is accepting IPv6 with bad format
255 [16640] string: string/strtok.c: undefined behaviour inconsistent between
256 x86 and other generic code
257 [16875] localedata: ko_KR: fix lang_name
258 [17225] localedata: ar_SY: localized month names for May and June are
260 [17297] localedata: da_DK: wrong date_fmt string
261 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
262 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
263 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
264 [19066] localedata: ar_SA abbreviated day and month names are in English
265 [19569] network: resolv: Support an arbitrary number of search domains
266 [19570] network: Implement random DNS server selection in the stub
268 [19838] locale: localedef fails on PA-RISC
269 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
270 order of 0D36 and 0D37
271 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
273 [20098] libc: FAIL: debug/backtrace-tst on hppa
274 [20257] network: sunrpc: clntudp_call does not enforce timeout when
276 [20275] localedata: locale day/abday/mon/abmon should not have trailing
278 [20313] localedata: Update locale data to Unicode 9.0
279 [20424] manual: Document how to provide a malloc replacement
280 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
282 [20686] locale: Add el_GR@euro to SUPPORTED.
283 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
284 failures consistently
285 [21015] dynamic-link: Document and fix --enable-bind-now
286 [21016] nptl: pthread_cond support is broken on hppa
287 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
288 frame-pointer on i386
289 [21049] libc: segfault in longjmp_chk() due to clobbered processor
291 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
292 [21088] libc: Build fails with --enable-static-nss
293 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
294 generic c code is used
295 [21109] libc: Tunables broken on big-endian
296 [21112] math: powf has large ulp errors with base close to 1 and exponent
298 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
300 [21120] malloc: glibc malloc is incompatible with GCC 7
301 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
303 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
304 (-0.0) when linking with -lieee
305 [21171] math: log10, log2 and lgamma return incorrect results
306 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
307 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
308 [21207] localedata: ce_RU: update weekdays from CLDR
309 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
310 [21217] localedata: Update months from CLDR-31
311 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
312 [21243] libc: support_delete_temp_file should issue warning for failed
314 [21244] libc: support resolv_test_start() socket fd close should be
316 [21253] libc: localedef randomly segfaults when using -fstack-check due to
317 new posix_spawn implementation
318 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
319 leads to lower CPU frequency
320 [21259] libc: [alpha] termios.h missing IXANY for POSIX
321 [21261] libc: [sparc64] bits/setjmp.h namespace
322 [21267] network: [mips] bits/socket.h IOC* namespace
323 [21268] libc: [alpha] termios.h NL2, NL3 namespace
324 [21270] libc: mmap64 silently truncates large offset values
325 [21275] libc: posix_spawn always crashes on ia64 now
326 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
327 [21280] math: [powerpc] logbl for POWER7 return incorrect results
328 [21289] libc: Incorrect declaration for 32-bit platforms with
329 _FILE_OFFSET_BITS=64 causes build error
330 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
331 not support gethostbyname4_r
332 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
334 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
336 [21340] libc: Support POSIX_SPAWN_SETSID
337 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
338 [21359] network: ns_name_pack needs additional byte in destination buffer
339 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
340 against fragmentation attacks (CVE-2017-12132)
341 [21369] network: resolv: Remove EDNS fallback
342 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
344 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
345 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
346 [21393] stdio: Missing dup3 error check in freopen, freopen64
347 [21396] libc: Use AVX2 memcpy/memset on Skylake server
348 [21399] localedata: Bad description for U00EC in
349 localedata/charmaps/CP1254
350 [21411] malloc: realloc documentation error
351 [21426] network: sys/socket.h uio.h namespace
352 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
353 [21445] libc: signal.h bsd_signal namespace
354 [21455] network: Network headers stdint.h namespace
355 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
357 [21475] network: resolv: Overlong search path is truncated mid-label
358 [21511] libc: sigstack namespace
359 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
360 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
361 bits/syscall.h: No such file or directory
362 [21517] libc: struct sigaltstack namespace
363 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
364 [21533] localedata: Update locale data to Unicode 10.0
366 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
367 junk at end of line, first unrecognized character is `@'
368 [21538] libc: SIG_HOLD missing for XPG4
369 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
370 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
371 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
372 [21543] libc: sigevent namespace
373 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
374 size for general purpose registers in mcontext_t structure
375 [21550] libc: sigwait namespace
376 [21552] libc: XPG4 bsd_signal namespace
377 [21554] libc: sigpause namespace
378 [21560] libc: sys/wait.h signal.h namespace
379 [21561] libc: waitid namespace
380 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
381 '/usr/include/stdlib.h': Permission denied
382 [21575] libc: sys/wait.h missing struct rusage definition
383 [21584] libc: sigaltstack etc namespace
384 [21597] libc: siginterrupt namespace
385 [21607] math: hppa: FAIL: math/test-tgmath
386 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
388 [21622] libc: [tile] missing SA_* for POSIX.1:2008
389 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
390 stack and heap (CVE-2017-1000366)
391 [21625] libc: wait3 namespace
392 [21654] nss: Incorrect pointer alignment in NSS group merge result
394 [21657] network: Parse interface zone id for node-local multicast
395 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
397 [21666] libc: .symver is used on common symbol
398 [21668] network: resolv: res_init cross-thread broadcast introduces race
400 [21687] math: tgmath.h totalorder, totalordermag return type
401 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
403 [21696] libc: Incorrect assumption of of __cpu_mask in
404 posix/sched_cpucount.c
405 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
406 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
408 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
409 leading to relocation crash
410 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
411 `resolv_conf_matches (resp, conf)' failed.
412 [21710] localedata: Added Samoan language locale for Samoa
413 [21711] localedata: Pashto yesstr/nostr locale are missing
414 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
415 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
416 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
417 [21723] localedata: yesstr/nostr missing for Chinese language locale
418 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
420 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
422 [21728] localedata: New Locale for Tongan language
423 [21729] localedata: incorrect LC_NAME fields for hi_IN
424 [21733] localedata: yesstr and nostr are missing for zh_HK
425 [21734] localedata: Missing yesstr and nostr are for kw_GB
426 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
427 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
428 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
429 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
431 [21744] libc: Tests failing on --enable-tunables --enable-stack-
433 [21749] localedata: Wrong abbreviated day name (“abday”) for
435 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
436 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
437 [21759] localedata: missing yesstr and nostr for Tigrinya
438 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
439 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
440 [21767] localedata: Missing Bislama locales
441 [21768] localedata: Missing yesstr and nostr for aa_ET
442 [21770] localedata: Missing Field in li_NL
443 [21778] nptl: Robust mutex may deadlock
444 [21779] libc: MicroBlaze segfaults when loading libpthread
445 [21783] localedata: Fix int_select international_call_prefixes
446 [21784] localedata: Inconsistency in country_isbn
447 [21788] localedata: Missing Country Postal Abbreviations
448 [21794] localedata: Added-country_isbn-for-Italy
449 [21795] localedata: Add/Fix country_isbn for France
450 [21796] localedata: Added country_isbn for Republic of Korea
451 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
452 [21799] localedata: Added int_select international_call_prefixes
453 [21801] localedata: Added int_select international_call_prefixes
454 [21804] nptl: Double semicolon in thread-shared-types.h
455 [21807] localedata: LC_ADDRESS fix for pap_CW
456 [21808] localedata: Fix LC_ADDRESS for pap_AW
457 [21821] localedata: Added country_name in mai_IN
458 [21822] localedata: Fix LC_TIME for mai_IN
459 [21823] localedata: missing yesstr, nostr for sa_IN
460 [21825] localedata: Fix name_mrs for mag_IN
461 [21828] localedata: 2.26 changelog should mention user visible changes
463 [21835] localedata: Added Maithili language locale for Nepal
464 [21838] localedata: Removed redundant data for the_NP
465 [21839] localedata: Fix LC_MONETARY for ta_LK
466 [21844] localedata: Fix Latin characters and Months Sequence.
467 [21848] localedata: Fix mai_NP Title Name
472 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
473 24731-2:2010, is supported to enable declarations of functions from that
474 TR. Note that not all functions from that TR are supported by the GNU C
477 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
478 18661-1:2014, is supported to enable declarations of functions and macros
479 from that TS. Note that not all features from that TS are supported by
482 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
483 18661-4:2015, is supported to enable declarations of functions and macros
484 from that TS. Note that most features from that TS are not supported by
487 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
488 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
489 Since the GNU C Library defaults to a much newer revision of POSIX, this
490 will only affect programs that specifically request an old conformance
491 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
492 see a change in the visible declarations, but a program compiled with
493 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
496 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
497 defined by all multithreaded code, but glibc has not required this for
500 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
501 means that in a future release, the macros “major”, “minor”, and “makedev”
502 will only be available from <sys/sysmacros.h>.
504 These macros are not part of POSIX nor XSI, and their names frequently
505 collide with user code; see for instance glibc bug 19239 and Red Hat bug
506 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
507 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
510 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
511 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
512 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
514 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
515 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
516 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
517 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
518 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
519 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
520 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
521 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
522 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
523 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
524 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
527 * New <math.h> features are added from TS 18661-1:2014:
529 - Signaling NaN macros: SNANF, SNAN, SNANL.
531 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
532 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
533 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
535 - llogb functions: the llogb, llogbf and llogbl functions, and the
536 FP_LLOGB0 and FP_LLOGBNAN macros.
538 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
541 - Comparison macros: iseqsig.
543 - Classification macros: iscanonical, issubnormal, iszero.
545 - Total order functions: totalorder, totalorderf, totalorderl,
546 totalordermag, totalordermagf, totalordermagl.
548 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
550 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
551 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
553 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
554 are added to libc. They convert a floating-point number into string.
556 * Most of glibc can now be built with the stack smashing protector enabled.
557 It is recommended to build glibc with --enable-stack-protector=strong.
558 Implemented by Nick Alcock (Oracle).
560 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
561 intended to be used instead of memset() to erase sensitive data after use;
562 the compiler will not optimize out calls to explicit_bzero even if they
563 are "unnecessary" (in the sense that no _correct_ program can observe the
564 effects of the memory clear).
566 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
567 to float instead of double. This does not affect the ABI of any libraries
568 that are part of the GNU C Library, but may affect the ABI of other
569 libraries that use this type in their interfaces.
571 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
572 float_t and double_t types are now defined to long double instead of float
573 and double. These options are not the default, and this does not affect
574 the ABI of any libraries that are part of the GNU C Library, but it may
575 affect the ABI of other libraries that use this type in their interfaces,
576 if they are compiled or used with those options.
578 * The getentropy and getrandom functions, and the <sys/random.h> header file
581 * The buffer size for byte-oriented stdio streams is now limited to 8192
582 bytes by default. Previously, on Linux, the default buffer size on most
583 file systems was 4096 bytes (and thus remains unchanged), except on
584 network file systems, where the buffer size was unpredictable and could be
585 as large as several megabytes.
587 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
588 for the Linux quota interface which predates kernel version 2.4.22 has
591 * The malloc_get_state and malloc_set_state functions have been removed.
592 Already-existing binaries that dynamically link to these functions will
593 get a hidden implementation in which malloc_get_state is a stub. As far
594 as we know, these functions are used only by GNU Emacs and this change
595 will not adversely affect already-built Emacs executables. Any undumped
596 Emacs executables, which normally exist only during an Emacs build, should
597 be rebuilt by re-running “./configure; make” in the Emacs build tree.
599 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
600 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
601 “no-ip6-dotint” had already been the default, and support for the
602 “ip6-dotint” option was removed from the Internet in 2006.
604 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
605 flag from <resolv.h> have been removed. The option relied on a
606 backwards-incompatible DNS extension which was never deployed on the
609 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
610 RES_BLAST defined in the <resolv.h> header file have been deprecated.
611 They were already unimplemented.
613 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
614 _res.flags are deprecated. The flag was standardized in RFC 2133, but
615 removed again from the IETF name lookup interface specification in RFC
616 2553. Applications should use getaddrinfo instead.
618 * DNSSEC-related declarations and definitions have been removed from the
619 <arpa/nameser.h> header file, and libresolv will no longer attempt to
620 decode the data part of DNSSEC record types. Previous versions of glibc
621 only implemented minimal support for the previous version of DNSSEC, which
622 is incompatible with the currently deployed version.
624 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
625 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
626 <arpa/nameser.h> header file because the distinction between RR types and
627 meta-RR types is not officially standardized, subject to revision, and
628 thus not suitable for encoding in a macro.
630 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
631 and rhook members of the res_state type in <resolv.h> have been removed.
632 The glibc stub resolver did not support these hooks, but the header file
633 did not reflect that.
635 * For multi-arch support it is recommended to use a GCC which has
636 been built with support for GNU indirect functions. This ensures
637 that correct debugging information is generated for functions
638 selected by IFUNC resolvers. This support can either be enabled by
639 configuring GCC with '--enable-gnu-indirect-function', or by
640 enabling it by default by setting 'default_gnu_indirect_function'
641 variable for a particular architecture in the GCC source file
644 * GDB pretty printers have been added for mutex and condition variable
645 structures in POSIX Threads. When installed and loaded in gdb these pretty
646 printers show various pthread variables in human-readable form when read
647 using the 'print' or 'display' commands in gdb.
649 * Tunables feature added to allow tweaking of the runtime for an application
650 program. This feature can be enabled with the '--enable-tunables' configure
651 flag. The GNU C Library manual has details on usage and README.tunables has
652 instructions on adding new tunables to the library.
654 * A new version of condition variables functions have been implemented in
655 the NPTL implementation of POSIX Threads to provide stronger ordering
658 * A new version of pthread_rwlock functions have been implemented to use a more
659 scalable algorithm primarily through not using a critical section anymore to
662 Security related changes:
664 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
665 have been created with makecontext could fail to terminate due to a
666 missing .cantunwind annotation. This has been observed to lead to a hang
667 (denial of service) in some Go applications compiled with gccgo. Reported
668 by Andreas Schwab. (CVE-2016-6323)
670 * The DNS stub resolver functions would crash due to a NULL pointer
671 dereference when processing a query with a valid DNS question type which
672 was used internally in the implementation. The stub resolver now uses a
673 question type which is outside the range of valid question type values.
676 The following bugs are resolved with this release:
678 [4099] stdio: Overly agressive caching by stream i/o functions.
679 [7065] build: Support building glibc with -fstack-protector or -fstack-
681 [9842] localedata: en_CA: incorrect date format
682 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
683 before it started waiting
684 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
685 [15765] nptl: sem_open is wrongly a cancellation point
686 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
687 [16458] libc: endian.h and netinet/in.h byte order macros return values of
689 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
690 library linked with pthread
691 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
693 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
694 [17252] libc: getrandom and getentropy syscall
695 [17730] malloc: thread-local storage is sometimes improperly free()'d
696 after being __libc_memalign()'d
697 [18241] stdio: failed fseek on memstream does not set errno and can fail
699 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
701 [18463] nptl: pthread_cond_broadcast issue when surrounded by
702 PTHREAD_PRIO_INHERIT mutex on ARM
703 [18784] network: res_query and related function crash for special record
704 type queries (CVE-2015-5180)
705 [19380] math: strtod does not raise "inexact"
706 [19387] string: Integer overflow in memchr
707 [19390] string: Integer overflow in strncat
708 [19398] build: linknamespace tests fail with massively parallel build
709 [19402] nptl: Deadlock with robust shared mutex and asynchronous
711 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
712 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
713 [19514] libc: [PATCH] Fix spelling errors in spelling
714 "implement"/"implementation" in several places
715 [19582] network: Deprecate RES_USE_INET6
716 [19673] manual: clog10 docs appear to be erroneous
717 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
718 causes a segmentation fault
719 [19826] libc: invalid pointer returned from __tls_get_addr with static
721 [20016] network: resolv: Remove hooks support from the API
722 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
724 [20033] math: [x86_64] vectorized math function don't call the __finite
726 [20116] nptl: use after free in pthread_create
727 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
728 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
730 [20311] nptl: please install proc_service.h
731 [20366] libc: Compilation errors in installed headers in strict-compliance
733 [20370] malloc: malloc: Arena free list management is still racy
734 (incorrect fix in bug 19243)
735 [20386] libc: assert (X = 0) does not result in GCC warning
736 [20432] malloc: malloc: Minimize interface required for interposition
737 [20435] libc: Missing unwind info in __startcontext causes infinite loop
738 in _Unwind_Backtrace (CVE-2016-6323)
739 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
740 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
742 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
743 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
744 [20477] network: resolv: incorrect double-checked locking related to
746 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
748 [20495] math: x86_64 performance degradation due to AVX/SSE transition
750 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
751 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
752 cause transition penalty
753 [20517] math: sparcv9 missing fdiml compat symbol
754 [20524] manual: strverscmp is inconsistent
755 [20525] libc: <sys/quota.h> should be based on kernel headers
756 [20539] math: GCC 7 -static -lm fails to link at -O3
757 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
759 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
761 [20591] network: Remove obsolete DNSSEC support
762 [20592] network: DNS resource record type classification macros in
763 <arpa/nameser.h> are incorrect
764 [20593] network: Update DNS RR type definitions
765 [20611] network: getaddrinfo accepts invalid numeric scope IDs
766 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
768 [20629] network: libresolv: Remove support for bitstring labels
770 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
771 assertion: "maxidx >= 2"
772 [20660] math: [arm] Use VSQRT
773 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
774 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
775 [20689] libc: Test for FMA should also check for AVX.
776 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
777 [20715] math: iszero macro breaks existing code
778 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
779 [20728] libc: powerpc: Missing TOC stub in clone
780 [20729] build: glibc-2.24 fails to build for i486 with -Os
781 [20750] build: Build fails with default PIE enabled gcc-6.x
782 [20768] math: [alpha] sqrt fegetenv namespace
783 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
785 [20787] math: float_t is defined as float incorrectly on x86_64 even if
786 __FLT_EVAL_METHOD__ is 2
787 [20790] network: rpcgen buffer overrun in get_prog_declaration
788 [20822] nptl: race condition in __lll_unlock_elision on powerpc
789 [20829] libc: crypt snprintf namespace
790 [20847] libc: tst-vfork3 failure
791 [20855] math: Default bits/mathdef.h has inappropriate float_t
792 [20859] math: [sh4] FP_ILOGB0 invalid
793 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
794 U+20AC), not same as GBK
795 [20915] dynamic-link: global-dynamic TLS broken on aarch64
796 [20916] math: pow handling of sNaN arguments
797 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
798 [20919] math: Bad pow (qNaN, 0) result with -lieee
799 [20940] math: hypot sNaN handling
800 [20947] math: fmax, fmin sNaN handling
801 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
802 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
804 [20971] string: powerpc64/power7 memchr overflows internal pointer check
805 [20973] nptl: robust mutexes: Lost wake-ups
806 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
807 [20978] nis: strlen on null pointer in nss_nisplus
808 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
810 [21014] string: i686 memchr overflows internal pointer check
811 [21019] libc: [mips] n32 lseek incorrect on overflow
812 [21022] libc: [microblaze] __backtrace get_frame_size namespace
813 [21026] libc: [MIPS] readahead syscall is broken on n64
814 [21028] math: Fallback fesetexceptflag should always succeed
815 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
816 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
818 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
819 [21061] librt: [microblaze] librt lost clock_* exports
820 [21073] libc: tunables: insecure environment variables passed to
821 subprocesses with AT_SECURE
822 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
826 * The minimum Linux kernel version that this version of the GNU C Library
827 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
828 kernel version 2.6.32 or later suffices (on architectures that already
829 required kernel versions more recent than 3.2, those requirements remain
830 unchanged). Linux 3.2 or later kernel headers are required on all
833 * The pap_AN locale has been deleted. This has been deprecated for a long
834 time. It has been replaced by pap_AW & pap_CW, both of which have long
835 been included in previous releases.
837 * The readdir_r and readdir64_r functions have been deprecated. It is
838 recommended to use readdir and readdir64 instead.
840 * The type “union wait” has been removed. It was deprecated in the early
841 1990s and never part of POSIX. Application code should use the int type
842 instead of “union wait”.
844 * A new NSS action is added to facilitate large distributed system
845 administration. The action, MERGE, allows remote user stores like LDAP
846 to be merged into local user stores like /etc/groups in order to provide
847 easy to use, updated, and managed sets of merged credentials. The new
848 action can be used by configuring it in /etc/nsswitch.conf:
849 group: files [SUCCESS=merge] nis
850 Implemented by Stephen Gallagher (Red Hat).
852 * The deprecated __malloc_initialize_hook variable has been removed from the
855 * The long unused localedef --old-style option has been removed. It hasn't
856 done anything in over 16 years. Scripts using this option can safely
859 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
860 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
861 return the next representable value in the direction of positive infinity
862 and the nextdown functions return the next representable value in the
863 direction of negative infinity. These are currently enabled as GNU
866 Security related changes:
868 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
869 could result in a stack overflow when getnetbyname was called with an
870 overly long name. (CVE-2016-3075)
872 * Previously, getaddrinfo copied large amounts of address data to the stack,
873 even after the fix for CVE-2013-4458 has been applied, potentially
874 resulting in a stack overflow. getaddrinfo now uses a heap allocation
875 instead. Reported by Michael Petlan. (CVE-2016-3706)
877 * The glob function suffered from a stack-based buffer overflow when it was
878 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
879 Reported by Alexander Cherepanov. (CVE-2016-1234)
881 * The Sun RPC UDP client could exhaust all available stack space when
882 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
883 alloca plugin for GCC. (CVE-2016-4429)
885 * The IPv6 name server management code in libresolv could result in a memory
886 leak for each thread which is created, performs a failing naming lookup,
887 and exits. Over time, this could result in a denial of service due to
888 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
890 The following bugs are resolved with this release:
892 [1170] localedata: ne_NP: update Nepali locale definition file
893 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
895 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
896 [6796] math: fdim() does not set errno on overflow
897 [10354] libc: posix_spawn should use vfork() in more cases than presently
898 [11213] localedata: localedata: add copyright disclaimer to locale files
899 [12143] localedata: chr_US: new Cherokee locale
900 [12450] localedata: sgs_LT: new locale
901 [12676] localedata: ln_CD: new locale
902 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
904 [13304] math: fma, fmaf, fmal produce wrong results
905 [14259] build: --localedir arg to configure is ignored
906 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
907 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
908 [14934] localedata: es_CL: wrong first weekday chilean locale
909 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
911 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
913 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
914 [15368] nptl: raise() is not async-signal-safe
915 [15479] math: ceil, floor, round and trunc raise inexact exception
916 [15578] localedata: kk_KZ: various updates
917 [16003] localedata: pap_AN: punt old locale
918 [16137] localedata: iw_IL: punt old locale
919 [16190] localedata: eo: new esperanto locale
920 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
921 [16742] malloc: race condition: pthread_atfork() called before first
922 malloc() results in unexpected locking behaviour/deadlocks
923 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
925 [16983] localedata: postal_fmt does not allow %l and %n modifiers
926 [17565] localedata: pt_PT: wrong (work-)week start
927 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
928 [17950] build: Build fails with -msse
929 [18205] localedata: be_BY*: wrong first_weekday and first_workday
930 [18433] libc: posix_spawn does not return correctly upon failure to
932 [18453] localedata: charmaps/IBM875: incorrect codes
933 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
935 [18896] localedata: he_IL: improvements for currency
936 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
938 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
940 [19056] libc: Deprecate readdir_r
941 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
943 [19198] localedata: nl_NL: small improvements for Dutch locales
944 [19257] network: Per-thread memory leak in __res_vinit with IPv6
945 nameservers (CVE-2016-5417)
946 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
948 [19400] locale: Language missing in "iso-639.def", trivial fix in
950 [19431] malloc: Deadlock between fflush, getdelim, and fork
951 [19505] libc: Incorrect file descriptor validity checks in
952 posix_spawn_file_actions_add{open,close,dup2}
953 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
955 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
956 `intl/{gettextP,loadinfo}.h'
957 [19534] libc: execle, execlp may use malloc
958 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
959 [19573] network: res_nclose and __res_maybe_init disagree about name
960 server initialization, breaking Hesiod
961 [19575] localedata: Status of GB18030 tables
962 [19581] localedata: sr_* date_fmt string contains additional newline
963 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
965 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
966 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
967 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
968 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
970 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
972 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
974 [19610] dynamic-link: ldconfig -X removes stale symbolic links
975 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
976 [19633] locale: strfmon_l applies global locale to number formatting
977 [19642] network: Memory leak in getnameinfo
978 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
979 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
981 [19654] math: [x86_64] Need testcase for BZ #19590 fix
982 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
984 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
985 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
987 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
989 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
991 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
992 pointers and lengths in error-case.
993 [19727] locale: Converting from/to UTF-xx with iconv() does not always
994 report errors on UTF-16 surrogates values.
995 [19755] nscd: nscd assertion failure in gc
996 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
997 [19759] libc: mempcpy shouldn't be inlined
998 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
999 [19765] libc: s390 needs an optimized mempcpy
1000 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1001 NAME_MAX limit assumption (CVE-2016-1234)
1002 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1003 [19787] network: Missing and incorrect truncation checks in getnameinfo
1004 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1006 [19791] network: Assertion failure in res_query.c with un-connectable name
1008 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1009 [19822] math: libm.so install clobbers old version
1010 [19825] network: resolv: send_vc can return uninitialized data in second
1011 response to getaddrinfo
1012 [19830] network: nss_dns: should check RDATA length against buffer length
1013 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1014 confronted with A/AAAA records of invalid size
1015 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1016 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1017 [19853] stdio: Printing IBM long double in decimal with high precision is
1019 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1020 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1021 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1023 [19865] network: Assertion failure or memory leak in
1024 _nss_dns_getcanonname_r
1025 [19868] network: nss_dns: netent code does not skip over non-PTR records
1026 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1028 [19881] string: Improve x86-64 memset
1029 [19907] string: Incorrect memcpy tests
1030 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1032 [19925] libc: termios.h XCASE namespace
1033 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1034 [19929] libc: limits.h NL_NMAX namespace
1035 [19931] stdio: Memory leak in vfprintf
1036 [19957] libc: clone(CLONE_VM) access invalid parent memory
1037 [19963] localedata: en_IL: New locale
1038 [19989] stdio: stdio.h cuserid namespace
1039 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1041 [19996] locale: langinfo.h nl_langinfo_l namespace
1042 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1043 [20010] network: getaddrinfo: Stack overflow in hostent translation
1045 [20012] stdio: libio: fmemopen append mode failure
1046 [20014] stdio: stdio.h namespace for pre-threads POSIX
1047 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1048 [20023] libc: fcntl.h timespec namespace
1049 [20024] math: [x86_64] vectorized sincos trashes the stack
1050 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1051 [20041] time: sys/time.h timespec namespace
1052 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1053 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1054 [20051] libc: ttyslot in wrong header under wrong conditions
1055 [20054] libc: gethostname not declared for XPG4
1056 [20055] libc: termios.h missing tcgetsid for XPG4
1057 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1059 [20073] libc: sys/stat.h fchmod namespace
1060 [20074] libc: stdlib.h rand_r namespace
1061 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1062 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1064 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1065 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1067 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1068 [20119] libc: Wrong mask for processors level type from CPUID
1069 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1070 AS not supporting AVX512
1071 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1073 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1074 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1076 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1077 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1078 [20178] libc: posix_spawn{p} should not call exit
1079 [20191] stdio: libio: vtables hardening
1080 [20195] string: FMA4 detection requires CPUID execution with register
1082 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1083 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1085 [20212] math: acos (sNaN) returns sNaN
1086 [20213] math: asin (sNaN) returns sNaN
1087 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1088 [20218] math: [i386] asinhl (sNaN) returns sNaN
1089 [20219] math: [i386] atanhl (sNaN) returns sNaN
1090 [20222] stdio: fopencookie: Mangle function pointers
1091 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1092 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1093 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1095 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1096 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1097 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1098 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1099 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1100 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1101 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1102 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1103 [20240] math: modf (sNaN) returns sNaN
1104 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1105 [20250] math: frexp (sNaN) returns sNaN
1106 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1107 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1109 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1110 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1111 subscript is below array bounds [-Werror=array-bounds]
1112 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1113 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1115 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1116 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1118 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1119 "invalid" exceptions
1120 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1121 [20316] localedata: id_ID: Februari instead of Pebruari
1122 [20327] string: POWER8 strcasecmp returns incorrect result
1123 [20347] math: Failure: Test: j0_downward (0xap+0)
1124 [20348] libc: FAIL: misc/tst-preadvwritev64
1125 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1126 [20350] libc: There is no test for p{read,write}64
1127 [20357] math: Incorrect cos result for 1.5174239687223976
1128 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1132 * Unicode 8.0.0 Support: Character encoding, character type info, and
1133 transliteration tables are all updated to Unicode 8.0.0, using new
1134 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1135 These updates cause user visible changes, such as the fixes for bugs
1136 89, 16061, and 18568.
1138 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1139 kernel-internal CPU set size. This means that requests that change the
1140 CPU affinity which failed before (for example, an all-ones CPU mask) will
1141 now succeed. Applications that need to determine the effective CPU
1142 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1143 setting it because the kernel can adjust it (and the previous size check
1144 would not detect this in the majority of cases).
1146 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1147 the following new symbols are used: fts64_children, fts64_close,
1148 fts64_open, fts64_read and fts64_set.
1150 * getaddrinfo now detects certain invalid responses on an internal netlink
1151 socket. If such responses are received, an affected process will
1152 terminate with an error message of "Unexpected error <number> on netlink
1153 descriptor <number>" or "Unexpected netlink response of size <number> on
1154 descriptor <number>". The most likely cause for these errors is a
1155 multi-threaded application which erroneously closes and reuses the netlink
1156 file descriptor while it is used by getaddrinfo.
1158 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1159 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1160 unnecessary serialization of memory allocation requests across threads.
1161 The defect is now corrected. Users should see a substantial increase in
1162 the concurent throughput of allocation requests for applications which
1163 trigger this bug. Affected applications typically create and
1164 destroy threads frequently. (Bug 19048 was reported and analyzed by
1167 * There is now a --disable-timezone-tools configure option for disabling the
1168 building and installing of the timezone related utilities (zic, zdump, and
1169 tzselect). This is useful for people who build the timezone data and code
1170 independent of the GNU C Library.
1172 * The obsolete header <regexp.h> has been removed. Programs that require
1173 this header must be updated to use <regex.h> instead.
1175 * The obsolete functions bdflush, create_module, get_kernel_syms,
1176 query_module and uselib are no longer available to newly linked binaries;
1177 the header <sys/kdaemon.h> has been removed. These functions and header
1178 were specific to systems using the Linux kernel and could not usefully be
1179 used with the GNU C Library on systems with version 2.6 or later of the
1182 * Optimized string, wcsmbs and memory functions for IBM z13.
1183 Implemented by Stefan Liebler.
1185 * Newly linked programs that define a variable called signgam will no longer
1186 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1187 require signgam to be set by those functions must ensure that they use the
1188 variable provided by the GNU C Library and declared in <math.h>, without
1189 defining their own copy.
1191 * The minimum GCC version that can be used to build this version of the GNU
1192 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1193 still be used to compile programs using the GNU C Library.
1195 Security related changes:
1197 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1198 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1200 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1201 the pointer guard feature. It is always enabled. Previously,
1202 LD_POINTER_GUARD could be used to disable security hardening in binaries
1203 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1206 * An integer overflow in hcreate and hcreate_r could lead to an
1207 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1209 * The catopen function no longer has unbounded stack usage. Reported by
1210 Max. (CVE-2015-8779)
1212 * The nan, nanf and nanl functions no longer have unbounded stack usage
1213 depending on the length of the string passed as an argument to the
1214 functions. Reported by Joseph Myers. (CVE-2014-9761)
1216 * A stack-based buffer overflow was found in libresolv when invoked from
1217 libnss_dns, allowing specially crafted DNS responses to seize control
1218 of execution flow in the DNS client. The buffer overflow occurs in
1219 the functions send_dg (send datagram) and send_vc (send TCP) for the
1220 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1221 family. The use of AF_UNSPEC triggers the low-level resolver code to
1222 send out two parallel queries for A and AAAA. A mismanagement of the
1223 buffers used for those queries could result in the response of a query
1224 writing beyond the alloca allocated buffer created by
1225 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
1226 the overflow. Thanks to the Google Security Team and Red Hat for
1227 reporting the security impact of this issue, and Robert Holiday of
1228 Ciena for reporting the related bug 18665. (CVE-2015-7547)
1230 The following bugs are resolved with this release:
1232 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
1233 [887] math: Math library function "logb" and "nextafter" inconsistent
1234 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
1235 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
1236 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
1237 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
1239 [4404] localedata: German translation of "Alarm clock" is misleading
1240 [6799] math: nextafter() and nexttoward() doen't set errno on
1241 overflow/underflow errors
1242 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
1244 [10432] nis: _nss_nis_setnetgrent assertion failure
1245 [11460] libc: fts has no LFS support
1246 [12926] network: getaddrinfo()/make_request() may spin forever
1247 [13065] nptl: Race condition in pthread barriers
1248 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
1249 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
1251 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
1252 [14912] libc: Rename non-installed bits/*.h headers
1253 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
1254 [15367] math: Let gcc use __builtin_isinf
1255 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
1256 [15421] math: lgamma wrongly sets signgam for ISO C
1257 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
1258 FE_INVALID with argument out of range
1259 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
1261 [15786] dynamic-link: ifunc resolver functions can smash function
1263 [15918] math: Unnecessary check for equality in hypotf()
1264 [16061] localedata: Review / update transliteration data
1265 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
1267 [16141] time: strptime %z offset restriction
1268 [16171] math: drem should be alias of remainder
1269 [16296] math: fegetround is pure?
1270 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
1271 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
1273 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
1274 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
1276 [16422] math: [powerpc] math-float, math-double failing llrint tests with
1277 "Exception "Inexact" set" on ppc32
1278 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
1279 [16517] math: Missing underflow exception from tanf/tan/tanl
1280 [16519] math: Missing underflow exception from sinhf
1281 [16520] math: Missing underflow exception from tanhf
1282 [16521] math: Missing underflow exception from exp2
1283 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
1285 [16734] stdio: fopen calls mmap to allocate its buffer
1286 [16961] math: nan function incorrect handling of bad sequences
1287 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
1288 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
1289 [16985] locale: localedef: confusing error message when opening output
1291 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
1292 [17197] locale: Redundant shift character in iconv conversion output at
1294 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
1295 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
1296 [17250] dynamic-link: static linking breaks nss loading
1297 (getaddrinfo/getpwnam/etc...)
1298 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
1300 [17441] math: isnan() should use __builtin_isnan() in GCC
1301 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
1302 (related to lock elision)
1303 [17787] manual: Exponent on page 324 of the PDF ends prematurely
1304 [17886] time: strptime should be able to parse "Z" as a timezone with %z
1305 [17887] time: strptime should be able to parse "+01:00" style timezones
1306 [17905] libc: catopen() Multiple unbounded stack allocations
1308 [18084] libc: backtrace (..., 0) dumps core on x86
1309 [18086] libc: nice() sets errno to 0 on success
1310 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
1311 is too large (CVE-2015-8778)
1312 [18251] dynamic-link: SONAME missing when audit modules provides path
1313 [18265] libc: add attributes for wchar string and memory functions
1314 [18370] math: csqrt missing underflows
1315 [18421] libc: [hppa] read-only segment has dynamic relocations
1316 [18472] libc: Obsolete syscall wrappers should be compat symbols
1317 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
1318 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
1319 [18525] localedata: Remove locale timezone information
1320 [18560] libc: [powerpc] spurious bits/ipc.h definitions
1321 [18568] localedata: Update locale data to Unicode 8.0
1322 [18589] locale: sort-test.sh fails at random
1323 [18595] math: ctan, ctanh missing underflows
1324 [18604] libc: assert macro-expands its argument
1325 [18610] math: S390: fetestexcept() reports any exception if DXC-code
1326 contains a vector instruction exception.
1327 [18611] math: j1, jn missing errno setting on underflow
1328 [18618] localedata: sync Chechen locale definitions with other *_RU
1330 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
1331 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
1332 [18665] network: In send_dg, the recvfrom function is NOT always using the
1333 buffer size of a newly created buffer (CVE-2015-7547)
1334 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
1336 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
1338 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
1339 [18699] math: tilegx cproj() for various complex infinities does not yield
1341 [18724] libc: Harden put*ent functions against data injection
1342 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
1343 [18755] build: build errors with -DNDEBUG
1344 [18757] stdio: fmemopen fails to set errno on failure
1345 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
1347 [18781] libc: openat64 lacks O_LARGEFILE
1348 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
1349 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
1350 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
1351 [18790] math: [ldbl-128ibm] tanhl inaccurate
1352 [18795] libc: stpncpy fortification misses buffer lengths that are
1353 statically too large
1354 [18796] build: build fails for --disable-mathvec
1355 [18803] math: hypot missing underflows
1356 [18820] stdio: fmemopen may leak memory on failure
1357 [18823] math: csqrt spurious underflows
1358 [18824] math: fma spurious underflows
1359 [18825] math: pow missing underflows
1360 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
1361 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
1362 [18870] build: sem_open.c fails to compile with missing symbol
1364 [18872] stdio: Fix memory leak in printf_positional
1365 [18873] libc: posix_fallocate overflow check ineffective
1366 [18875] math: Excess precision leads incorrect libm
1367 [18877] libc: arm: mmap offset regression
1368 [18887] libc: memory corruption when using getmntent on blank lines
1369 [18918] localedata: hu_HU: change time to HH:MM:SS format
1370 [18921] libc: Regression: extraneous stat() and fstat() performed by
1372 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
1373 binaries (CVE-2015-8777)
1374 [18951] math: tgamma missing underflows
1375 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
1377 [18953] localedata: lt_LT: change currency symbol to the euro
1378 [18956] math: powf inaccuracy
1379 [18961] math: [i386] exp missing underflows
1380 [18966] math: [i386] exp10 missing underflows
1381 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
1382 [18969] build: multiple string test failures due to missing locale
1384 [18970] libc: Reference of pthread_setcancelstate in libc.a
1385 [18977] math: float / long double Bessel functions not in XSI POSIX
1386 [18980] math: i386 libm functions return with excess range and precision
1387 [18981] math: i386 scalb*, ldexp return with excess range and precision
1388 [18982] stdio: va_list and vprintf
1389 [18985] time: Passing out of range data to strftime() causes a segfault
1391 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
1392 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
1393 [19012] locale: iconv_open leaks memory on error path
1394 [19016] math: clog, clog10 inaccuracy
1395 [19018] nptl: Mangle function pointers in tls_dtor_list
1396 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
1397 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
1398 [19048] malloc: malloc: arena free list can become cyclic, increasing
1400 [19049] math: [powerpc] erfc incorrect zero sign
1401 [19050] math: [powerpc] log* incorrect zero sign
1402 [19058] math: [x86_64] Link fail with -fopenmp and -flto
1403 [19059] math: nexttoward overflow incorrect in non-default rounding modes
1404 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
1405 [19074] network: Data race in _res_hconf_reorder_addrs
1406 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
1407 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
1408 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
1410 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
1412 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
1413 [19086] manual: posix_fallocate64 documented argument order is wrong.
1414 [19088] math: lround, llround missing exceptions close to overflow
1416 [19094] math: lrint, llrint missing exceptions close to overflow threshold
1417 [19095] math: dbl-64 lrint incorrect for 64-bit long
1418 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
1419 [19124] dynamic-link: ld.so failed to build with older assmebler
1420 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
1421 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
1422 [19134] math: [powerpc32] lround, lroundf spurious exceptions
1423 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
1424 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
1425 pthread_setaffinity_np
1426 [19156] math: [ldbl-128] j0l spurious underflows
1427 [19164] nptl: tst-getcpu fails with many possible CPUs
1428 [19168] math: math/test-ildoubl and math/test-ldouble failure
1429 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
1430 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
1432 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
1433 (FE_NOMASK_ENV) do not clear SSE exceptions
1434 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
1435 _int_new_arena/reused_arena
1436 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
1437 [19201] math: dbl-64 remainder incorrect sign of zero result
1438 [19205] math: bits/math-finite.h conditions do not match math.h and
1440 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
1441 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
1442 for C99-based standards
1443 [19212] libc: features.h not -Wundef clean
1444 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
1446 [19214] libc: Family and model identification for AMD CPU's are incorrect.
1447 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
1448 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
1450 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
1451 "inexact" exceptions
1452 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
1454 [19242] libc: strtol incorrect in Turkish locales
1455 [19243] malloc: reused_arena can pick an arena on the free list, leading
1456 to an assertion failure and reference count corruption
1457 [19253] time: tzset() ineffective when temporary TZ did not include DST
1459 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
1460 [19270] math: [hppa] Shared libm missing __isnanl
1461 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
1462 MAP_HUGETLB and MAP_STACK defines
1463 [19313] nptl: Wrong __cpu_mask for x32
1464 [19347] libc: grantpt: try to force a specific gid even without pt_chown
1465 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
1466 [19350] math: [ldbl-128ibm] sinhl spurious overflows
1467 [19351] math: [ldbl-128ibm] logl inaccurate near 1
1468 [19363] time: x32: times() return value wrongly truncates/sign extends
1470 [19367] dynamic-link: Improve branch prediction on Silvermont
1471 [19369] network: Default domain name not reset by res_ninit when "search"
1472 / "domain" entry is removed from resolv.conf
1473 [19375] math: powerpc: incorrect results for POWER7 logb with negative
1475 [19385] localedata: bg_BG: time separator should be colon, not comma
1476 [19408] libc: linux personality syscall wrapper may erroneously return an
1477 error on 32-bit architectures
1478 [19415] libc: dladdr returns wrong names on hppa
1479 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
1480 IBM905, IBM907, and IBM909
1481 [19439] math: Unix98 isinf and isnan functions conflict with C++11
1482 [19443] build: build failures with -DDEBUG
1483 [19451] build: Make check fails on test-double-vlen2
1484 [19462] libc: Glibc failed to build with -Os
1485 [19465] math: Wrong code with -Os
1486 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
1488 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
1490 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
1491 [19486] math: S390: Math tests fail with "Exception Inexact set".
1492 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
1493 [19550] libc: [mips] mmap negative offset handling inconsistent with other
1495 [19590] math: Fail to build shared objects that use libmvec.so functions.
1499 * The following bugs are resolved with this release:
1501 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
1502 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
1503 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
1504 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
1505 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
1506 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
1507 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
1508 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
1509 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
1510 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
1511 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
1512 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
1513 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
1514 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
1515 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
1516 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
1517 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
1518 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
1519 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
1520 18657, 18676, 18694, 18696, 18887.
1522 * Cache information can be queried via sysconf() function on s390 e.g. with
1523 _SC_LEVEL1_ICACHE_SIZE as argument.
1525 * A buffer overflow in gethostbyname_r and related functions performing DNS
1526 requests has been fixed. If the NSS functions were called with a
1527 misaligned buffer, the buffer length change due to pointer alignment was
1528 not taken into account. This could result in application crashes or,
1529 potentially arbitrary code execution, using crafted, but syntactically
1530 valid DNS responses. (CVE-2015-1781)
1532 * The time zone file parser has been made more robust against crafted time
1533 zone files, avoiding heap buffer overflows related to the processing of
1534 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
1535 large time zone data files. Overly long time zone specifiers in the TZ
1536 variable no longer result in stack overflows and crashes.
1538 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
1539 for LD and GD on x86 and x86-64, has been implemented. You will need
1540 binutils-2.24 or later to enable this optimization.
1542 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
1543 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
1544 Hat). These updates cause user visible changes, such as the fix for bug
1547 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
1548 and getXXbyYY NSS calls for the same database, causing a denial-of-service
1549 condition in some applications.
1551 * Added vector math library named libmvec with the following vectorized x86_64
1552 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
1554 The library can be disabled with --disable-mathvec. Use of the functions is
1555 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
1556 Shared library libmvec.so is linked in as needed when using -lm (no need to
1557 specify -lmvec explicitly for not static builds).
1558 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
1560 * A new fmemopen implementation has been added with the goal of POSIX
1561 compliance. The new implementation fixes the following long-standing
1562 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
1563 old implementation is still present for use be by existing binaries.
1565 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
1566 releases. It has been fixed to match 2.19 and older, but binaries built
1567 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
1569 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
1570 Contributed by Roland McGrath (Google).
1572 * The header <regexp.h> is deprecated, and will be removed in a future
1573 release. Use of this header will trigger a deprecation warning.
1574 Application developers should update their code to use <regex.h> instead.
1576 This header was formerly part of SUS, but was deprecated in 1994 and
1577 removed from the standard in 2001. Also, the glibc implementation
1578 leaks memory. See BZ#18681 for more details.
1582 * The following bugs are resolved with this release:
1584 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
1585 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
1586 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
1587 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
1588 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
1589 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
1590 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
1591 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
1592 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
1593 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
1596 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
1597 too little memory for the to-be-scanned arguments and overflow the
1598 allocated buffer. The implementation now correctly computes the required
1599 buffer size when using malloc, and switches to malloc from alloca as
1602 * A new semaphore algorithm has been implemented in generic C code for all
1603 machines. Previous custom assembly implementations of semaphore were
1604 difficult to reason about or ensure that they were safe. The new version
1605 of semaphore supports machines with 64-bit or 32-bit atomic operations.
1606 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
1607 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
1609 * Port to Altera Nios II has been contributed by Mentor Graphics.
1611 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
1612 implementations for powerpc64/powerpc64le.
1613 Implemented by Adhemerval Zanella (IBM).
1615 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
1616 and powerpc64le. This may improve lock scaling of existing programs on
1617 HTM capable systems. The lock elision code is only enabled with
1618 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1619 powerpc will issue a transaction abort on every syscall to avoid side
1620 effects being visible outside transactions.
1622 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1623 AArch64. Contributed by ARM Ltd.
1625 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1627 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1628 under certain input conditions resulting in the execution of a shell for
1629 command substitution when the application did not request it. The
1630 implementation now checks WRDE_NOCMD immediately before executing the
1631 shell and returns the error WRDE_CMDSUB as expected.
1633 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1634 processing format strings with a large number of format specifiers.
1636 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1637 infinite loop if the DNS response contained a PTR record of an unexpected
1640 * The minimum GCC version that can be used to build this version of the GNU
1641 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1642 still be used to compile programs using the GNU C Library.
1644 * The GNU C Library is now built with -Werror by default. This can be
1645 disabled by configuring with --disable-werror.
1647 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1649 * The obsolete sigvec function has been removed. This was the original
1650 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1651 programs have been using instead for about 25 years. Of course, ABI
1652 compatibility for old binaries using sigvec remains intact.
1654 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1655 with newer versions of bison.
1657 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1658 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1659 registers overlay two consecutive single-precision registers. MIPS32R2
1660 introduced a new FPU mode (FR=1) where double-precision registers extend the
1661 corresponding single-precision registers which is incompatible with the
1662 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1663 require the use of FR=1 making a transition necessary. New o32 ABI
1664 extensions enable users to migrate over time from the original o32 ABI
1665 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1666 tracks the ABI of any loaded object and verifies that new objects are
1667 compatible. Mode transitions will also be requested as required and
1668 unsupportable objects will be rejected. The ABI checks include both soft and
1669 hard float ABIs for o32, n32 and n64.
1671 GCC 5 with GNU binutils 2.25 onwards:
1672 It is strongly recommended that all o32 system libraries are built using the
1673 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1674 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1675 compiler using --with-fp-32=xx to set this by default.
1679 * The following bugs are resolved with this release:
1681 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1682 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1683 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1684 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1685 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1686 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1687 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1688 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1689 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1690 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1691 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1692 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1693 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1694 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1695 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1697 * Reverted change of ABI data structures for s390 and s390x:
1698 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1699 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1700 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1701 are preserved pointing straight to the same implementation as the old ones.
1702 Given that, new callers will simply provide a too-big buffer to these
1703 functions. Any applications/libraries out there that embed jmp_buf or
1704 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1705 against 2.19 headers will have to rebuilt again. This is necessary in any
1706 case to revert the breakage in their ABI caused by the glibc change.
1708 * Support for file description locks is added to systems running the
1709 Linux kernel. The standard file locking interfaces are extended to
1710 operate on file descriptions, not file descriptors, via the use of
1711 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1712 are associated with an open file instead of a process.
1714 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1716 * The minimum Linux kernel version that this version of the GNU C Library
1717 can be used with is 2.6.32.
1719 * Running the testsuite no longer terminates as soon as a test fails.
1720 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1721 with PASS or FAIL lines for individual tests. A summary of the results is
1722 printed, including a list of failing lists, and "make check" exits with
1723 error status if there were any unexpected failures. "make check
1724 stop-on-test-failure=y" may be used to keep the old behavior.
1726 * The am33 port, which had not worked for several years, has been removed
1729 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1730 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1731 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1732 conflicted with POSIX (support for which was removed in 2.19), the
1733 interfaces those macros enabled remain available when compiling with
1734 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1735 test macros defined.
1737 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1739 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1740 This may improve lock scaling of existing programs on TX capable systems.
1741 The lock elision code is only built with --enable-lock-elision=yes and
1742 then requires a GCC version supporting the TX builtins. With lock elision
1743 default mutexes are elided via __builtin_tbegin, if the cpu supports
1744 transactions. By default lock elision is not enabled and the elision code
1747 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1748 copy the path argument. This allowed programs to cause posix_spawn to
1749 deference a dangling pointer, or use an unexpected pathname argument if
1750 the string was modified after the posix_spawn_file_actions_addopen
1753 * All supported architectures now use the main glibc sysdeps directory
1754 instead of some being in a separate "ports" directory (which was
1755 distributed separately before glibc 2.17).
1757 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1758 On configurations that support it (all Linux configurations), it's now
1759 used regardless of the --enable-add-ons switch to configure. It is no
1760 longer possible to build such configurations without pthreads support.
1762 * Locale names, including those obtained from environment variables (LANG
1763 and the LC_* variables), are more tightly checked for proper syntax.
1764 setlocale will now fail (with EINVAL) for locale names that are overly
1765 long, contain slashes without starting with a slash, or contain ".." path
1766 components. (CVE-2014-0475) Previously, some valid locale names were
1767 silently replaced with the "C" locale when running in AT_SECURE mode
1768 (e.g., in a SUID program). This is no longer necessary because of the
1771 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1772 with application code using Intel MPX instructions. (With all previous
1773 versions, the MPX register state could be clobbered when making calls
1774 into or out of a shared library.) Note that while the new dynamic
1775 linker is compatible with all known x86 hardware whether or not it
1776 supports Intel MPX, some x86 instruction-set emulators might fail to
1777 handle the new instruction encodings. This is known to affect Valgrind
1778 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1779 release), and might affect other tools that do instruction emulation.
1781 * Support for loadable gconv transliteration modules has been removed.
1782 The support for transliteration modules has been non-functional for
1783 over a decade, and the removal is prompted by security defects. The
1784 normal gconv conversion modules are still supported. Transliteration
1785 with //TRANSLIT is still possible, and the //IGNORE specifier
1786 continues to be supported. (CVE-2014-5119)
1788 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1789 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1790 resulting a denial-of-service security vulnerability in applications which
1791 use functions related to iconv. (CVE-2014-6040)
1795 * The following bugs are resolved with this release:
1797 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1798 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1799 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1800 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1801 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1802 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1803 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1804 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1805 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1806 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1807 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1808 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1809 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1810 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1811 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1812 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1813 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1814 16431, 16453, 16474, 16506, 16510, 16529
1816 * Slovenian translations for glibc messages have been contributed by the
1817 Translation Project's Slovenian team of translators.
1819 * The public headers no longer use __unused nor __block. This change is to
1820 support compiling programs that are derived from BSD sources and use
1821 __unused internally, and to support compiling with Clang's -fblock
1822 extension which uses __block.
1824 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1825 large collation sequences to optimize multiple passes. This cache
1826 computation may overflow for large collation sequences and may cause a
1827 stack or buffer overflow. This is now fixed to use a slower algorithm
1828 which does not use a cache if there is an integer overflow.
1830 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1831 rules for large collation sequences to optimize multiple passes and falls
1832 back to alloca if malloc fails, resulting in a possible stack overflow.
1833 The implementation now falls back to an uncached collation sequence lookup
1836 * CVE-2013-4788 The pointer guard used for pointer mangling was not
1837 initialized for static applications resulting in the security feature
1838 being disabled. The pointer guard is now correctly initialized to a
1839 random value for static applications. Existing static applications need
1840 to be recompiled to take advantage of the fix (bug 15754).
1842 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
1843 to the d_name member of struct dirent, or omit the terminating NUL
1844 character. (Bugzilla #14699).
1846 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
1847 aligned_alloc functions could allocate too few bytes or corrupt the
1848 heap when passed very large allocation size values (Bugzilla #15855,
1851 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
1852 for AF_INET6 has been fixed (Bugzilla #16072).
1854 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
1855 pap_CW, quz_PE, the_NP.
1857 * Substantially revised locales: gd_GB, ht_HT
1859 * The LC_ADDRESS field was updated to support country_car for almost all
1862 * ISO 1427 definitions were updated.
1864 * ISO 3166 definitions were updated.
1866 * The localedef utility now supports --big-endian and --little-endian
1867 command-line options to generate locales for a different system from that
1868 for which the C library was built.
1870 * Binary locale files now only depend on the endianness of the system for
1871 which they are generated and not on other properties of that system. As a
1872 consequence, binary files generated with new localedef may be incompatible
1873 with old versions of the GNU C Library, and binary files generated with
1874 old localedef may be incompatible with this version of the GNU C Library,
1875 in the following circumstances:
1877 + Locale files may be incompatible on m68k systems.
1879 + Locale archive files (but not separate files for individual locales) may
1880 be incompatible on systems where plain "char" is signed.
1882 * The configure option --disable-versioning has been removed. Builds with
1883 --disable-versioning had not worked for several years.
1885 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
1886 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
1888 * SystemTap probes for malloc have been introduced.
1890 * SystemTap probes for slow multiple precision fallback paths of
1891 transcendental functions have been introduced.
1893 * Support for powerpc64le has been added.
1895 * The soft-float powerpc port now supports e500 processors.
1897 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
1899 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
1900 set of header declarations that are enabled by default, even when other
1901 feature test macros or compiler options such as -std=c99 would otherwise
1902 disable some of those declarations.
1904 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
1905 conflict with POSIX. The libbsd-compat library (which was a dummy library
1906 that did nothing) has also been removed.
1908 * Preliminary documentation about Multi-Thread, Async-Signal and
1909 Async-Cancel Safety has been added.
1911 * Change of ABI data structures for s390 and s390x:
1912 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
1913 allow for future hardware extensions. All library functions that accept or
1914 return these structures were versioned in order to provide backwards
1915 compatibility with existing code. However, not all cases can be handled
1916 with interface versioning. If an application embeds either structure into
1917 another structure and that structure is passed to another compilation unit
1918 which expects the newer larger-sized object then any access to the new
1919 fields will result in undefined behaviour. Similarly any access to fields
1920 that were moved by the enlarging of the structures will cause undefined
1921 behaviour. To fix the undefined behaviour all objects that are part of the
1922 final in-memory image must agree on the size of structures, and this may
1923 require recompilation.
1927 * The following bugs are resolved with this release:
1929 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
1930 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
1931 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
1932 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
1933 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
1934 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
1935 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
1936 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
1937 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
1938 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
1939 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
1940 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
1941 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
1944 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
1945 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
1946 Distributions can re-enable building and using pt_chown via the new configure
1947 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
1948 considerable security risks and should only be used if the distribution
1949 understands and accepts the risks.
1951 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
1954 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
1955 fixed (Bugzilla #15330).
1957 * Add support for calling C++11 thread_local object destructors on thread
1958 and program exit. This needs compiler support for offloading C++11
1959 destructor calls to glibc.
1961 * Improved worst case performance of libm functions with double inputs and
1964 * Support for priority inherited mutexes in pthread condition variables on
1965 non-x86 architectures.
1967 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
1969 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
1971 * Optimized string functions for ARM. Implemented by Will Newton and
1974 * Optimized libm functions for SPARC. Implemented by David S. Miller.
1976 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
1979 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
1980 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
1982 * Added a benchmark framework to track performance of functions in glibc.
1984 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
1985 It is based on draft TS 18661 and currently enabled as a GNU extension.
1987 * On Linux, the clock function now uses the clock_gettime system call
1988 for improved precision, rather than old times system call.
1990 * Added support for version-3 tz format files. This is needed when using
1991 the tz database release 2013e or later, and affects a few unusual cases --
1992 currently only TZ='America/Godthab' for time stamps after 2037.
1994 * Added new API functions pthread_getattr_default_np and
1995 pthread_setattr_default_np to get and set the default pthread
1996 attributes of a process.
1998 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
1999 This may improve lock scaling of existing programs on TSX capable systems.
2000 When the --enable-lock-elision=yes parameter is specified at configure
2001 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2004 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2005 availability). Implemented by Ryan S. Arnold.
2007 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2011 * The following bugs are resolved with this release:
2013 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2014 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2015 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2016 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2017 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2018 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2019 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2020 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2021 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2022 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2023 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2024 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2025 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2026 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2027 14879, 14889, 14893, 14898, 14914.
2029 * Optimization of memcpy for MIPS.
2031 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2032 EMFILE has been fixed (Bugzilla #14889).
2034 * The add-on ports collection is now distributed in the "ports" subdirectory
2035 of the main GNU C Library distribution, rather than separately.
2037 * Port to ARM AArch64 contributed by Linaro.
2039 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2040 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2042 Implemented by Andreas Krebbel.
2044 * The new function secure_getenv allows secure access to the environment,
2045 returning NULL if running in a SUID/SGID process. This function replaces
2046 the internal function __secure_getenv.
2048 * SystemTap static probes have been added into the dynamic linker.
2049 Implemented by Gary Benson.
2051 * Optimizations of string functions strstr, strcasestr and memmem.
2052 Implemented by Maxim Kuvyrkov.
2054 * The minimum Linux kernel version that this version of the GNU C Library
2055 can be used with is 2.6.16.
2057 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2058 powerpc POWER7. Implemented by Will Schmidt.
2060 * New configure option --disable-nscd builds the C library such that it
2061 never attempts to contact the Name Service Caching Daemon (nscd).
2062 New configure option --disable-build-nscd avoids building nscd itself;
2063 this is the default if --disable-nscd is used.
2065 * Improved support for cross-compilation, including cross-testing and
2066 bootstrap builds without a previously built glibc.
2068 * Several testsuite tests are now able to test multiple IFUNC variants of an
2069 interface, rather than just testing the one that would be chooen by
2072 * New configure options --with-bugurl and --with-pkgversion, for
2073 distributors to use to embed their bug-reporting and package version
2074 information in --help and --version output.
2076 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2077 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2078 allows creation of chroots without the procfs mounted on /proc.
2080 * The `crypt' function now fails if passed salt bytes that violate the
2081 specification for those values. On Linux, the `crypt' function will
2082 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2083 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2084 when the mode is enabled.
2086 * The `clock_*' suite of functions (declared in <time.h>) is now available
2087 directly in the main C library. Previously it was necessary to link with
2088 -lrt to use these functions. This change has the effect that a
2089 single-threaded program that uses a function such as `clock_gettime' (and
2090 is not linked with -lrt) will no longer implicitly load the pthreads
2091 library at runtime and so will not suffer the overheads associated with
2092 multi-thread support in other code such as the C++ runtime library.
2094 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2099 * The following bugs are resolved with this release:
2101 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2102 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2103 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2104 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2105 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2106 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2107 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2108 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2109 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2110 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2111 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2112 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2113 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2114 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2115 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2116 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2117 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2118 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2119 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2120 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2121 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2122 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2125 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2126 configuring glibc with:
2127 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2128 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2129 Implemented by H.J. Lu.
2133 + define static_assert
2135 + do not declare gets
2137 + declare at_quick_exit and quick_exit also for ISO C11
2139 + aligned_alloc. NB: The code is deliberately allows the size parameter
2140 to not be a multiple of the alignment. This is a moronic requirement
2141 in the standard but it is only a requirement on the caller, not the
2144 + timespec_get added
2146 + uchar.h support added
2148 + CMPLX, CMPLXF, CMPLXL added
2150 Implemented by Ulrich Drepper.
2152 * Support for the IA-64 has been moved to ports.
2154 * Remove support for anything but ELF binary format
2156 * Checking versions of poll, ppoll added.
2157 Implemented by Ulrich Drepper.
2159 * More generic and 64-bit performance optimizations to math functions.
2160 Implemented by Ulrich Drepper.
2162 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2163 headers and functions available at compile time as they were before
2164 version 2.14. This option will be removed at some time in the future
2165 after the TI-RPC library becomes fully sufficient for the needs of
2166 existing applications.
2168 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2169 Note that glibc is not expected to work with any Linux kernel version
2172 * New header <sys/auxv.h> and function getauxval allowing easy access to
2173 the AT_* key-value pairs passed from the Linux kernel. The header also
2174 defines the HWCAP_* bits associated with the AT_HWCAP key.
2176 * New locales: mag_IN
2178 * New configure option --enable-systemtap builds SystemTap static probes
2179 into libc for setjmp and longjmp and into libpthread for various operations.
2180 So far the setjmp/longjmp probes and some of the libpthread probes are
2181 provided only for i*86 and x86_64.
2182 Implemented by Roland McGrath and Rayson Ho.
2184 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2186 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2189 * More optimized functions for SPARC. Implemented by David S. Miller.
2191 * Improved support for cross-compilation, especially bootstrap builds
2192 without a previously built glibc.
2194 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2195 Chris Metcalf from Tilera.
2197 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2198 now supported for ARM processors.
2200 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2201 as the name of the dynamic linker, to distinguish it from the
2202 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2204 * Support for CRIS has been removed from ports.
2206 * A new class of installed header has been documented for low-level
2207 platform-specific functionality. PowerPC added the first instance with a
2208 function to provide time base register access. Contributed by Tulio
2209 Magno Quites Machado Filho.
2211 * ix86 configurations now install header files that are consistent with
2212 what x86-64 configurations install. These same header files can be used
2213 for -m32, -m64, or -mx32 builds.
2214 Contributed by H.J. Lu.
2216 * Math library bug fixes. A thorough audit of all open math library bugs was
2217 conducted by Joseph Myers. Significant progress was made on many math
2218 library bugs resulting in more accurate exceptions and function results.
2219 Many thanks to all those that contributed including Andreas Jaeger for his
2220 patch review and work on the x87 trigonometric instruction issues.
2222 * Timezone data is no longer installed. Timezone-related binaries and scripts
2223 will continue to be installed. Users should obtain their timezone data from
2224 their distribution provider or from the tzdata package at
2225 <ftp://munnari.oz.au/pub/>.
2229 * The following bugs are resolved with this release:
2231 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
2232 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
2233 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
2234 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
2235 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
2236 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
2237 13484, 13506, 13515, 13523, 13524, 13538, 13540
2239 * New program pldd to list loaded object of a process
2240 Implemented by Ulrich Drepper.
2242 * Add nss_db support back to glibc. No more dependency on Berkeley db
2243 and support for initgroups lookups.
2244 Implemented by Ulrich Drepper.
2246 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
2247 Contributed by HJ Lu.
2249 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
2250 Contributed by HJ Lu.
2252 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
2253 on x86-32 and x86-64.
2254 Contributed by Liubov Dmitrieva.
2256 * Optimized strchr and strrchr for SSE on x86-32.
2257 Contributed by Liubov Dmitrieva.
2259 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
2260 for x86-64 and x86-32.
2261 Contributed by Liubov Dmitrieva.
2263 * New interfaces: scandirat, scandirat64
2264 Implemented by Ulrich Drepper.
2266 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
2267 Implemented by Ulrich Drepper.
2269 * nscd now also caches the netgroup database.
2270 Implemented by Ulrich Drepper.
2272 * Integrate libm with gcc's -ffinite-math-only option.
2273 Implemented by Ulrich Drepper.
2275 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
2276 to math functions. Implemented by Ulrich Drepper.
2278 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
2279 Implemented by Ulrich Drepper.
2281 * New Linux interfaces: process_vm_readv, process_vm_writev
2283 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
2284 Implemented by Ulrich Drepper.
2286 * Optimized nearbyint and strcasecmp for PPC.
2287 Implemented by Adhemerval Zanella.
2289 * New locales: bho_IN, unm_US, es_CU, ta_LK
2293 * The following bugs are resolved with this release:
2295 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
2296 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
2297 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
2298 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
2299 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
2300 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
2301 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
2302 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
2303 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
2304 12795, 12811, 12813, 12814, 12841
2306 * The RPC implementation in libc is obsoleted. Old programs keep working
2307 but new programs cannot be linked with the routines in libc anymore.
2308 Programs in need of RPC functionality must be linked against TI-RPC.
2309 The TI-RPC implementation is IPv6 enabled and there are other benefits.
2311 Visible changes of this change include (obviously) the inability to link
2312 programs using RPC functions without referencing the TI-RPC library and the
2313 removal of the RPC headers from the glibc headers.
2314 Implemented by Ulrich Drepper.
2316 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
2317 syncfs, setns, sendmmsg
2319 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
2320 yue_HK, lij_IT, mhr_RU
2322 * New encodings: CP770, CP771, CP772, CP773, CP774
2324 * New program sotruss to trace calls through PLTs
2325 Implemented by Ulrich Drepper.
2327 * The malloc hook implementation is marked deprecated and will be removed
2328 from the default implementation in the next version. The design never
2329 worked ever since the introduction of threads. Even programs which do
2330 not create threads themselves can use multiple threads created internally.
2334 * The following bugs are resolved with this release:
2336 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
2337 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
2338 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
2339 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
2342 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
2344 * POWER7 optimizations: memset, memcmp, strncmp
2346 * New optimized string functions for x86-64: strnlen (SSE2),
2347 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
2348 Implemented by Ulrich Drepper.
2352 * The following bugs are resolved with this release:
2354 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
2355 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
2356 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
2357 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
2358 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
2359 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
2360 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
2361 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
2363 * New interfaces: pthread_getname_np, pthread_setname_np
2365 * New Linux interface: recvmmsg
2367 * STT_GNU_IFUNC implemented for Sparc by David Miller.
2369 * The dynamic linker now recognizes supported ABI versions from the
2370 EI_ABIVERSION field in the ELF header.
2371 Implemented by Ulrich Drepper.
2373 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
2374 will not be used to fill in password fields in the passwd.byname replies.
2375 Instead it is used to synthesize the shadow.byname table, should it be
2376 missing. This is a useful mode in some installations involving Solaris.
2377 Implemented by Ulrich Drepper.
2379 * New locales: kok_IN, sq_MK, cv_RU
2383 * The following bugs are resolved with this release:
2385 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
2386 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
2387 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
2388 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
2389 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
2390 10789, 10817, 10823, 10840, 10847
2392 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
2394 Implemented by Ulrich Drepper.
2396 * Checking version of longjmp added that fails if an uninitialized stack
2397 frame would be created. Implemented by Ulrich Drepper.
2399 * STT_GNU_IFUNC is now supported in static executables.
2400 Implemented by H.J. Lu.
2402 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
2404 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
2405 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
2406 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
2407 Contributed by H.J. Lu.
2409 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
2410 Implemented by Ulrich Drepper.
2412 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
2414 Contributed by H.J. Lu.
2416 * Support for fma instruction in AVX on x86-64.
2417 Implemented by H.J. Lu and Ulrich Drepper.
2419 * AVX support in x86-64 auditing support in ld.so.
2420 Implemented by H.J. Lu.
2422 * STB_GNU_UNIQUE support added.
2423 Implemented by Ulrich Drepper.
2425 * Implement second fallback mode for optimized DNS lookup for even more
2426 broken environments. If two requests from the same port are not
2427 handled correctly close the socket and open a new one before sending
2428 the second request. The 'single-request-reopen' option in /etc/resolv.conf
2429 can be used to select this mode right away, instead of rediscovering the
2430 necessity is every process again.
2431 Implemented by Ulrich Drepper.
2433 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
2434 Implemented by Adam Tkac.
2436 * Optimized iconv conversions for S390x.
2437 Implemented by Andreas Krebbel.
2439 * Using condvars with PI mutexes is now more efficient due to kernel
2440 support for requeueing to PI futexes. NPTL support added for x86-64.
2441 Implemented by Ulrich Drepper.
2443 * New locales: ps_AF, my_MM
2447 * The following bugs are resolved with this release:
2449 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
2450 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
2451 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
2452 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
2453 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
2455 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
2456 Implemented by Ulrich Drepper.
2458 * New Linux interfaces: accept4, fallocate, fallocate64.
2459 Implemented by Ulrich Drepper.
2461 * Correct declarations of string function when used in C++ code. This
2462 could lead to compile errors for invalid C++ code.
2464 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
2467 * New POSIX 2008 interface: psiginfo
2468 Implemented by Ulrich Drepper.
2470 * New ISO C++1x interfaces: quick_exit, at_quick_exit
2471 Implemented by Ulrich Drepper.
2473 * Support for selecting between multiple function definitions at runtime
2474 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
2476 * The libcrypt library can now use the hash function implementations in
2477 NSS. Implemented by Ulrich Drepper.
2479 * The malloc implementation can be compiled to be less memory efficient
2480 but higher performing in multi-threaded programs.
2481 Implemented by Ulrich Drepper.
2483 * New locales: nan_TW@latin, ks_IN
2485 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
2486 Implemented by Ulrich Drepper.
2488 * Extended printf hook support. It is possible to use user-defined types
2489 and extend existing format specifiers.
2490 Implemented by Ulrich Drepper.
2492 * Handling for group shadow files has been added.
2493 Implemented by Ulrich Drepper.
2495 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
2496 servers (the case, e.g., for some people using the built-in DNS
2497 server in ADSL modems/routers). There is a once-per-process timeout
2498 in case of a broken server. To avoid it, users can run nscd or put
2499 'options single-request' in /etc/resolv.conf.
2500 Implemented by Ulrich Drepper.
2504 * The following bugs are resolved with this release:
2506 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
2507 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
2508 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
2509 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
2510 6968, 6974, 6980, 6995, 7008, 7009, 7029
2512 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
2513 up at the same time. Implemented by Ulrich Drepper.
2515 * TLS descriptors for LD and GD on x86 and x86-64.
2516 Implemented by Alexandre Oliva.
2518 * getaddrinfo now handles DCCP and UDPlite.
2519 Implemented by Ulrich Drepper.
2521 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
2522 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
2523 Implemented by Ulrich Drepper.
2525 * New implementation of memmem, strstr, and strcasestr which is O(n).
2526 Implemented by Eric Blake.
2528 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
2530 * Implement "e" option for popen to open file descriptor with the
2531 close-on-exec flag set. Implemented by Ulrich Drepper.
2533 * Implement "b" mode for fmemopen. In this mode writes writes don't
2534 implicitly add a NUL byte and seeks from the end of the buffer really
2535 use the buffer end, not the string length as the basis.
2536 Implemented by Ulrich Drepper.
2538 * Many functions, exported and internal, now atomically set the close-on-exec
2539 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
2541 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
2543 Implemented by Pravin Satpute.
2545 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
2549 * The following bugs are resolved with this release:
2551 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
2552 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
2553 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
2554 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
2555 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
2556 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
2557 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
2559 * New locales: bo_CN, bo_IN, shs_CA.
2561 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
2563 * Sorting rules for some Indian languages (Devanagari and Gujarati).
2564 Implemented by Pravin Satpute.
2566 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
2568 * nscd caches now all timeouts for DNS entries
2569 Implemented by Ulrich Drepper.
2571 * nscd is more efficient and wakes up less often.
2572 Implemented by Ulrich Drepper.
2574 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
2575 vdprintf, and obstack_vprintf.
2576 Implemented by Jakub Jelinek.
2578 * Faster memset for x86-64.
2579 Implemented by Harsha Jagasia and H.J. Lu.
2581 * Faster memcpy on x86.
2582 Implemented by Ulrich Drepper.
2584 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
2585 Implemented by Ulrich Drepper.
2587 * Faster sqrt and sqrtf implemention for some PPC variants.
2588 Implemented by Steven Munroe.
2592 * The following bugs are resolved with this release:
2594 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
2595 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
2596 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
2597 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
2598 5071, 5103, 5104, 5112, 5113, 5184, 5186
2600 * More checking functions: fread, fread_unlocked, open*, mq_open.
2601 Implemented by Jakub Jelinek and Ulrich Drepper.
2603 * Extend fortification to C++. Implemented by Jakub Jelinek.
2605 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
2606 by not recognizing 'a' as a modifier when those specs are requested.
2607 Implemented by Jakub Jelinek.
2609 * PPC optimizations to math and string functions.
2610 Implemented by Steven Munroe.
2612 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
2613 options to be passed. Implemented by Ulrich Drepper.
2615 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
2617 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
2618 Implemented by Ulrich Drepper.
2620 * Handle private futexes in the NPTL implementation.
2621 Implemented by Jakub Jelinek and Ulrich Drepper.
2623 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2624 Implemented by Roland McGrath and Ulrich Drepper.
2626 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2628 * SHA-256 and SHA-512 based password encryption.
2629 Implemented by Ulrich Drepper.
2631 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2632 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2635 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2636 Implemented by Ulrich Drepper.
2640 * The following bugs are resolved with this release:
2642 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2643 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2644 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2645 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2646 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2647 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2648 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2651 * New Linux interfaces: epoll_pwait, sched_getcpu.
2653 * New generic interfaces: strerror_l.
2655 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2659 * The following bugs are resolved with this release:
2661 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2662 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2663 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2664 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2665 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2666 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2667 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2668 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2669 3225, 3251, 3252, 3253, 3273
2671 * For Linux, the sorting of addresses returned by getaddrinfo now also
2672 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2673 Implemented by Ulrich Drepper.
2675 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2676 Implemented by Ulrich Drepper.
2678 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2680 * New iconv module for MIK. Contributed by Alexander Shopov.
2682 * For sites with broken group and/or passwd database, the auto-propagate
2683 option of nscd can prevent creating ID lookup entries from the results
2684 of a name lookup and vice versa. This usually is no problem but some
2685 site might have problems with the default behavior.
2686 Implemented by Ulrich Drepper.
2688 * Iterating over entire database in NIS can be slow. With the
2689 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2690 to trade time for memory. The entire database will be read at once.
2691 Implemented by Ulrich Drepper.
2693 * The interfaces introduced in RFC 3542 have been implemented by
2696 * Support for the new ELF hash table format was added by Ulrich Drepper.
2698 * Support for priority inheritance mutexes added by Jakub Jelinek and
2701 * Support for priority protected mutexes added by Jakub Jelinek.
2703 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2704 or_IN, csb_PL, fy_NL, sr_ME.
2708 * More overflow detection functions.
2710 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2711 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2713 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2714 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2715 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2716 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2717 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2718 by Masahide Washizawa.
2720 * It is now possible to install audit libraries for the dynamic linker using
2721 LD_AUDIT. Implemented by Ulrich Drepper.
2723 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2724 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2725 For a libc and libpthread that works well on Linux 2.4 kernels, we
2726 recommend using the stable 2.3 branch.
2728 * The new function open_wmemstream acts like open_memstream,
2729 but uses a wchar_t wide character buffer.
2731 * The new function ppoll is an improved version of poll, similar to pselect.
2733 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2734 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2735 renameat, unlinkat, linkat, symlinkat, readlinkat.
2737 * New Linux kernel system calls: unshare,
2738 inotify_init, inotify_add_watch, inotify_rm_watch.
2740 * The euidaccess function is now also known by the alias eaccess,
2741 for compatibility with some other systems.
2743 * Timezone data updated to 2006b version.
2747 * The following bugs are resolved with this release:
2749 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2750 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2751 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2752 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2753 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2754 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2756 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2758 * As of this release, GCC 4 can be used to compile the C Library.
2760 * Timezone data updated to 2005m version.
2764 * The following bugs are resolved with this release:
2766 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2767 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2768 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2769 777, 787, 821, 822, 823, 825
2771 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2775 * Support for RFC 3678. Real implementations exist only for Linux so far.
2776 Implemented by Ulrich Drepper.
2778 * nscd can now cache entries persistently. Expiring entries are reloaded.
2779 For speedups the cache can be shared in memory with client processes.
2780 Implemented by Ulrich Drepper.
2782 * nscd can now perform SELinux checks.
2783 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2785 * getaddrinfo queries are now cached. Canonical name lookup is performed
2787 Implemented by Ulrich Drepper.
2789 * The nothrow function attribute is used when headers are used by gcc when
2790 compiling C code. This can avoid significant amounts of exception
2793 * The malloc functions perform more error checking and are stricter when
2794 it comes to reacting on errors. The default action is to terminate
2795 the process after showing an error message. Implemented by Ulrich Drepper.
2797 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2798 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2800 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2801 namespaces using the new function dlmopen(). This feature is of course,
2802 like most other dynamic loading functionality, not available in statically
2803 linked applications. Implemented by Ulrich Drepper.
2805 * Low-overhead boundary checking variants of string and some stdio functions
2806 were added. These are to be used in conjunction with a gcc patch by
2807 Jakub Jelinek which adds calls to these functions if possible.
2808 Implemented by Jakub Jelinek and Ulrich Drepper.
2810 * Old code for several operating systems and machine architectures that
2811 have not been in working condition in a long time have been removed from
2812 the main source tree maintained by the GNU C Library's maintainers.
2813 These files are now reside in the separate `ports' source module
2814 that is usable as an add-on when building the library.
2818 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2819 interrogate the dynamic linker, compatible with the Solaris interface.
2821 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2822 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2824 * getifaddrs now uses the netlink interface on Linux to get its information.
2825 Implemented by Thorsten Kukuk.
2827 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2828 Implemented by Ulrich Drepper.
2830 * support for non-executable stacks on x86 has been added. Changes mostly
2833 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
2836 * getaddrinfo now performs destination address selection according to
2841 * Thread-safe interfaces for many functions that access locale data
2842 were added in version 2.3, but these features were omitted from NEWS.
2843 Many functions have variants with an `_l' suffix that take a `locale_t'
2844 object as a parameter rather than consulting the current locale.
2845 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
2846 create and maintain `locale_t' objects. Additionally, the new function
2847 `uselocale' sets "the current locale" (as used by functions not so
2848 parameterized) set for an individual thread. These features were added
2849 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
2851 * The functions getresuid, getresgid, setresuid, and setresgid, which
2852 have long been available on Linux, are now declared in <unistd.h>
2853 and are now also available on the Hurd.
2855 * ELF thread-local storage support (TLS) now works on x86-64.
2857 * The new dynamic string token $LIB is expanded in shared library names.
2858 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
2860 * Aldy Hernandez contributed complete software floating point support for
2861 PowerPC machines with no FPU.
2863 * fexecve is implemented on Linux.
2865 * The `btowc' function should work at least twice as fast due to
2866 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
2868 * With approriate thread add-ons cancelable functions are now implemented
2869 in libc.so as well. No need to call the function in libpthread. This
2870 change allowed to finally disable the incorrect and expensive handling
2871 of weak definition in ld.so.
2873 * Yet more PLT entries in libc.so have been removed. We finally arrived
2874 at the bare minimum. Startup times improved appropriately.
2876 * Support for the new Linux/x86 system call interface was added. The
2877 AT_SYSINFO auxiliary vector entry is recognized and handled.
2881 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
2884 * iconv (the program and the interface) now accepts empty names (excluding
2885 options like //TRANSLIT) to mean "use charset of current locale".
2887 * localedef can now transliterate characters in strings which are not in
2888 the provided charmap. The information from the input locale is used.
2890 * Prelinking support was added for ELF targets. This requires additional
2891 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
2893 * Read-only stdio streams now use mmap to speed up operation by eliminating
2894 copying and buffer underflows. To use add 'm' to the mode string of
2895 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
2897 * The malloc functions were completely rewritten by Wolfram Gloger based
2898 on Doug Lea's malloc-2.7.0.c.
2900 * Isamu Hasegawa contributed a completely new and POSIX-conformant
2901 implementation of regex.
2903 * Bruno Haible upgraded the iconv and locale implementation to support
2906 * Contents of the LC_* and LANG environment variables in the CEN style are
2907 not recognized anymore. It never was used. Change by Ulrich Drepper.
2909 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
2910 thread-local storage (TLS) ABI on some platforms.
2911 Changes by Ulrich Drepper. SH support by Kaz Kojima.
2913 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
2914 EUC-JISX0213, and TSCII.
2916 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
2917 BSD-compatible interface for getting all network interface addresses.
2918 Implementation for IPv4 by Roland McGrath.
2920 * Loading of locale data is faster due to the introduction of a locale
2921 archive. Implemented by Roland McGrath and Ulrich Drepper.
2923 * Startup times are significantly reduced by not using exported functions
2924 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
2927 * Steven Munroe contributed a port to PowerPC64/Linux.
2931 * The Hurd now uses the GNU libio implementation of stdio rather than the
2932 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
2934 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
2935 with the same behavior as the Linux system call of the same name.
2939 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
2940 128-bit long double format.
2942 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
2943 IBM1161, and IBM1162 charsets.
2945 * Andreas Jaeger contributed a port to x86-64/Linux.
2947 * Peter Bruin contributed a port to PowerPC/Hurd.
2949 * libc functions using I/O streams now can handle wide-oriented streams
2952 * optimizations in the dynamic linker. Binaries created by recent binutils
2953 versions start up quicker due to reduced time spent on relocations.
2955 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
2959 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
2960 asinh, atanh, j0 for the 128-bit long double format.
2962 * Bruno Haible updated all the code handling Unicode in some form to
2963 support Unicode 3.1.
2965 * Speed of regex for single-byte locales is back to previous levels.
2966 Patch by Isamu Hasegawa.
2968 * Alpha, SPARC, and IA-64 now also using floating stacks.
2970 * Startup time of internationalized applications greatly improved through
2971 iconv cache. Use iconvconfig to generate the cache file.
2972 Contributed by Ulrich Drepper.
2974 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
2975 severe performance problems. Patch by David Mosberger.
2977 * The Hurd port got a lot more functionality like AIO, various stdio
2978 extensions, etc. Mainly done by Roland McGrath.
2980 * mtrace can now lookup symbols in shared libraries.
2984 * Intel's IA-64 math library is largely integrated. It provides fast and
2985 accurate implementatations for most basic and standard math functions
2986 in float, double, and long double format.
2988 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
2989 and asin for the 96-bit long double format and asin, log, tan for the
2990 128-bit long double format.
2992 * The beginning of a last-bit accurate math library by IBM Haifa were added.
2993 The basic double functions exist today. Contributed by Abraham Ziv
2994 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
2995 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
2997 * An asynchronous name lookup library was added. The interface is designed
2998 after POSIX AIO. The proposal was circulated beforehand to get comments.
2999 No negative ones came in. Implemented by Ulrich Drepper.
3001 * Port to S390/64bit contributed by Martin Schwidefsky
3002 <schwidefsky@de.ibm.com>.
3004 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3005 of functions for Linux/IA-64.
3007 * The RPC code is now thread safe. Threads can now use the same service
3008 of different services at the same time. Patch by Eric Norum
3009 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3011 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3012 family of functions for Linux/S390.
3014 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3015 of functions for Linux/x86.
3017 * Port to Linux/CRIS contributed by Axis Communications.
3021 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3022 we can now check for namespace violations and missing declarations. The
3023 result is that almost all headers are now Unix-compliant (as defined in
3024 the upcoming XPG6). The negative side is that some programs might need
3025 corrections, too, if they depend on the incorrect form of the headers in
3026 previous versions which defined too many symbols and included too many
3029 * regex now handles multibyte character sets correctly.
3030 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3032 * iconv (the program) does now conform to the upcoming XPG6 and handles
3033 charmaps. Instead of the charset names the path of charmaps can be
3034 provided and the conversion happens based on this data.
3035 Contributed by Ulrich Drepper.
3037 * The locale program now provides detailed information about the installed
3042 only lists the names of the supported locales
3046 provides details such as country, language, and codeset name.
3047 Contributed by Ulrich Drepper.
3051 * The gencat program now parses the input file according to the charset
3052 selected by the LC_CTYPE category. This is important for stateful
3053 character sets. To make generating catalogs easier there is a way
3054 to overwrite the charset selected by the locale: before the first
3055 message or $ quote line the catalog can contain a line like
3057 $ codeset=ISO-8859-2
3059 to select the charset (ISO-8859-2 in this case).
3061 Implemented by Shinya Hanataka and Ulrich Drepper.
3063 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3064 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3065 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3067 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3068 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3070 * The LANGUAGE environment variable is now ignored unless the locale is
3071 changed from the default "C" locale.
3073 * The usual bug fixes.
3077 * Greg McGary added runtime support for bounds checking using gcc's
3078 new -fbounded-pointers option. ix86 target is complete. PowerPC
3081 * Thorsten Kukuk added secure mode support to nscd.
3083 * The Berkeley db libraries have been removed.
3085 Related, the nss_db module is now in a separate package since it
3086 obviously requires a database library being available.
3088 * Wide character I/O streams implemented by Ulrich Drepper.
3090 * Functions from the extended socket API added by Ulrich Drepper.
3092 * Functions feenableexcept and fedisableexcept to control the
3093 behaviour of individual exceptions have been added by Andreas Jaeger.
3095 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3097 * The resolver code has been updated from bind 8.2.3-T5B which supports
3098 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3101 This change could in some situations effect backward compatibility. Since
3102 now `_res' is a thread-local instead of a global variable, modifying it
3103 in one thread does not have any effect in other threads.
3105 The resolver library was also extended to allow IPv6 as the transport
3106 protocol for the requests. This work was done by Stig Venaas.
3108 * Compatibility code for K&R C compilers has been removed from the
3109 header files. A ISO C compiler is needed to use the library
3110 (conforming to either C89 or C99 standard).
3112 * Complete rewrite of the localedef program to support multibyte character
3113 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3114 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3115 Implemented by Ulrich Drepper.
3117 Bruno Haible significantly improved the generation and use of the data
3118 structures for the wide character tables.
3120 * Plural handling in gettext implemented by Ulrich Drepper.
3122 * The utmp daemon has been removed.
3124 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3126 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3129 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3131 * POSIX barriers implemented by Kaz Kylheku.
3133 * POSIX spawn function family implemented by Ulrich Drepper.
3135 * POSIX spinlocks are now available.
3137 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3139 * the configure option --enable-kernel=X.Y.Z allows to strip out
3140 compatibility for kernel versions before X.Y.Z. This is currently only
3141 implemented for Linux.
3143 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3144 field sin6_scope_id. This means that all programs using IPv6 should be
3145 recompiled. Don't expect binary compatibility with previous glibc
3148 * various conversion modules for IBM character sets contributed by
3151 * IA-64 port by Jes Sorensen and HJ Lu.
3165 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3167 * New xdr functions are added; some rpc functions are now 64bit clean.
3169 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3171 * Fixed known incompatibilities with glibc 2.0.
3173 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3175 * Optimized a number of functions (especially the ELF dynamic loader).
3177 * Update timezone data files.
3179 * lots of charmaps corrections
3181 * some new locale definitions and charmaps
3186 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3187 conform to POSIX member type requirements. Symbol versions have been
3188 adjusted as needed within the library, and for direct use by applications,
3189 but there is potential for problems if third-party libraries use
3190 struct timeval as part of their interface. This does not present
3191 a problem for X and other "essential" system libraries.
3193 * An additional locale model to support C++ Standard Library locale
3194 model and probably more was implemented by Ulrich Drepper.
3196 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3199 * Miles Bader provided the `argp' function family to support hierachical
3200 command line argument parsing, layered on top of getopt.
3202 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3204 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3207 * scanf recognizes the %a and %A format for scanning floating point numbers.
3209 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3210 information and interfaces for the available integer types.
3212 * about 130 new math functions were added to implement the ISO C9x math
3215 * the new header <complex.h> contains definitions of the complex math
3216 functions from ISO C 9X.
3218 * the new header <tgmath.h> defines generic macros to use complex or
3219 real valued functions.
3221 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3223 * Andreas Jaeger provided a test suite for the math library.
3225 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
3227 * Ulrich Drepper added character set conversion functions (iconv).
3229 * Optimized string functions have been added.
3231 * The localedata addon is now part of glibc.
3233 * An implementation of profiling shared libraries was added by Ulrich Drepper.
3235 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
3236 daemon for NSS (nscd).
3238 Missing a better place here are some numbers on improvements. Under
3239 Linux 2.1.125 un-tar-ing the kernel sources takes
3243 using local files 12.19s 6.88s 22.91s
3245 using NIS 13.92s 8.91s 26.34s
3247 using NIS & nscd 10.37s 7.34s 25.30s
3249 using NIS+ 27.57s 30.37s 640.46s
3251 using NIS+ & nscd 10.25s 7.83s 26.51s
3253 using NIS & old nscd [1] 13.83s 8.32s 29.60s
3255 Keep in mind that non-namelookup related operations dominate above times.
3256 It was just a common complain that using NIS+ unpacking the kernel is
3259 [1] The old nscd implementation is not available anymore since it was
3260 distributed with glibc up to version 2.0.98 and thus is now replaced.
3262 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
3264 * Mark Kettenis provided a Hesiod NSS module.
3266 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
3267 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
3269 * rcmd can now handle netgroups (Dick Streefland).
3271 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
3274 * Support for the IPv6 protocol has been added to the socket API, as per the
3275 latest draft standards.
3277 * Support for Linux 2.2 has been added.
3279 * Interface changes relative to the latest 2.0.x release:
3280 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3281 addseverity NEW: Unix98
3282 alphasort64 NEW: LFS
3283 argp_err_exit_status NEW: argp, GNU ext
3284 argp_error NEW: argp, GNU ext
3285 argp_failure NEW: argp, GNU ext
3286 argp_help NEW: argp, GNU ext
3287 argp_parse NEW: argp, GNU ext
3288 argp_program_bug_address NEW: argp, GNU ext
3289 argp_program_version NEW: argp, GNU ext
3290 argp_program_version_hook NEW: argp, GNU ext
3291 argp_state_help NEW: argp, GNU ext
3292 argp_usage NEW: argp, GNU ext
3293 authdes_create NEW: Secure RPC
3294 authdes_getucred NEW: Secure RPC
3295 authdes_pk_create NEW: Secure RPC
3296 backtrace NEW: GNU ext.
3297 backtrace_symbols NEW: GNU ext.
3298 backtrace_symbols_fd NEW: GNU ext.
3300 cacosf NEW: ISO C 9x
3301 cacosh NEW: ISO C 9x
3302 cacoshf NEW: ISO C 9x
3303 cacoshl NEW: ISO C 9x
3304 cacosl NEW: ISO C 9x
3311 casinf NEW: ISO C 9x
3312 casinh NEW: ISO C 9x
3313 casinhf NEW: ISO C 9x
3314 casinhl NEW: ISO C 9x
3315 casinl NEW: ISO C 9x
3317 catanf NEW: ISO C 9x
3318 catanh NEW: ISO C 9x
3319 catanhf NEW: ISO C 9x
3320 catanhl NEW: ISO C 9x
3321 catanl NEW: ISO C 9x
3322 cbc_crypt NEW: Secure RPC
3326 ccoshf NEW: ISO C 9x
3327 ccoshl NEW: ISO C 9x
3333 cimagf NEW: ISO C 9x
3334 cimagl NEW: ISO C 9x
3335 clearerr_locked REMOVED
3336 clntunix_create NEW: sunrpc ext
3338 clog10 NEW: ISO C 9x
3339 clog10f NEW: ISO C 9x
3340 clog10l NEW: ISO C 9x
3350 cprojf NEW: ISO C 9x
3351 cprojl NEW: ISO C 9x
3353 crealf NEW: ISO C 9x
3354 creall NEW: ISO C 9x
3359 csinhf NEW: ISO C 9x
3360 csinhl NEW: ISO C 9x
3363 csqrtf NEW: ISO C 9x
3364 csqrtl NEW: ISO C 9x
3368 ctanhf NEW: ISO C 9x
3369 ctanhl NEW: ISO C 9x
3371 des_setparity NEW: Secure RPC
3372 ecb_crypt NEW: Secure RPC
3373 endutxent NEW: Unix98
3375 exp10f NEW: ISO C 9x
3376 exp10l NEW: ISO C 9x
3380 fattach NEW: STREAMS
3381 fdetach NEW: STREAMS
3385 feclearexcept NEW: ISO C 9x
3386 fegetenv NEW: ISO C 9x
3387 fegetexceptflag NEW: ISO C 9x
3388 fegetround NEW: ISO C 9x
3389 feholdexcept NEW: ISO C 9x
3391 feraiseexcept NEW: ISO C 9x
3392 ferror_locked REMOVED
3393 fesetenv NEW: ISO C 9x
3394 fesetexceptflag NEW: ISO C 9x
3395 fesetround NEW: ISO C 9x
3396 fetestexcept NEW: ISO C 9x
3397 feupdateenv NEW: ISO C 9x
3398 fflush_locked REMOVED
3402 fgets_unlocked NEW: GNU ext.
3403 fileno_locked REMOVED
3415 fputc_locked REMOVED
3416 fputs_unlocked NEW: GNU ext.
3417 fread_unlocked NEW: GNU ext.
3422 fstatvfs NEW: Unix98
3426 ftruncate64 NEW: LFS
3428 fwrite_unlocked NEW: GNU ext.
3429 gai_strerror NEW: IPv6
3433 getchar_locked REMOVED
3435 getdate_err NEW: Unix98
3436 getdate_r NEW: GNU ext.
3438 getnameinfo NEW: IPv6
3439 getnetname NEW: Secure RPC
3440 getpmsg NEW: STREAMS
3441 getpt NEW: Unix98 PTY
3442 getrlimit64 NEW: LFS
3443 getutxent NEW: Unix98
3444 getutxid NEW: Unix98
3445 getutxline NEW: Unix98
3446 glob64 NEW: GNU ext.
3447 globfree64 NEW: GNU ext.
3448 gnu_get_libc_release NEW: GNU ext.
3449 gnu_get_libc_version NEW: GNU ext.
3450 grantpt NEW: Unix98 PTY
3451 host2netname NEW: Secure RPC
3453 iconv_close NEW: iconv
3454 iconv_open NEW: iconv
3455 if_freenameindex NEW: IPv6
3456 if_indextoname NEW: IPv6
3457 if_nameindex NEW: IPv6
3458 if_nametoindex NEW: IPv6
3459 in6addr_any NEW: IPv6
3460 in6addr_loopback NEW: IPv6
3461 inet6_isipv4mapped NEW: IPv6
3462 isastream NEW: STREAMS
3463 iswblank NEW: GNU ext.
3464 key_decryptsession NEW: Secure RPC
3465 key_decryptsession_pk NEW: Secure RPC
3466 key_encryptsession NEW: Secure RPC
3467 key_encryptsession_pk NEW: Secure RPC
3468 key_gendes NEW: Secure RPC
3469 key_get_conv NEW: Secure RPC
3470 key_secretkey_is_set NEW: Secure RPC
3471 key_setnet NEW: Secure RPC
3472 key_setsecret NEW: Secure RPC
3473 llrint NEW: ISO C 9x
3474 llrintf NEW: ISO C 9x
3475 llrintl NEW: ISO C 9x
3476 llround NEW: ISO C 9x
3477 llroundf NEW: ISO C 9x
3478 llroundl NEW: ISO C 9x
3483 lrintf NEW: ISO C 9x
3484 lrintl NEW: ISO C 9x
3485 lround NEW: ISO C 9x
3486 lroundf NEW: ISO C 9x
3487 lroundl NEW: ISO C 9x
3489 makecontext NEW: Unix98
3490 mempcpy NEW: GNU ext.
3493 modify_ldt NEW: kernel
3497 nearbyint NEW: ISO C 9x
3498 nearbyintf NEW: ISO C 9x
3499 nearbyintl NEW: ISO C 9x
3500 netname2host NEW: Secure RPC
3501 netname2user NEW: Secure RPC
3502 nexttoward NEW: ISO C 9x
3503 nexttowardf NEW: ISO C 9x
3504 nexttowardl NEW: ISO C 9x
3508 passwd2des NEW: Secure RPC
3510 pow10f NEW: GNU ext.
3511 pow10l NEW: GNU ext.
3514 printf_size NEW: GNU ext.
3515 printf_size_info NEW: GNU ext.
3516 profil_counter REMOVED
3517 pthread_mutexattr_getkind_np REPLACED
3518 pthread_mutexattr_setkind_np REPLACED
3519 ptsname NEW: Unix98 PTY
3520 ptsname_r NEW: Unix98 PTY
3522 putchar_locked REMOVED
3523 putgrent NEW: GNU ext.
3525 putpmsg NEW: STREAMS
3526 pututxline NEW: Unix98
3530 readdir64_r NEW: LFS
3531 remquo NEW: ISO C 9x
3532 remquof NEW: ISO C 9x
3533 remquol NEW: ISO C 9x
3535 roundf NEW: ISO C 9x
3536 roundl NEW: ISO C 9x
3538 scalbln NEW: ISO C 9x
3539 scalblnf NEW: ISO C 9x
3540 scalblnl NEW: ISO C 9x
3542 sendfile NEW: kernel
3543 setcontext NEW: Unix98
3544 setrlimit64 NEW: LFS
3545 setutxent NEW: Unix98
3547 sigignore NEW: Unix98
3548 sigqueue NEW: POSIX.1b
3549 sigrelse NEW: Unix98
3550 sigset NEW: POSIX.1b
3551 sigtimedwait NEW: POSIX.1b
3552 sigwaitinfo NEW: POSIX.1b
3553 sincos NEW: GNU ext.
3554 sincosf NEW: GNU ext.
3555 sincosl NEW: GNU ext.
3559 strcasestr NEW: GNU ext.
3560 strtoimax NEW: ISO C 9x
3561 strtoumax NEW: ISO C 9x
3562 strverscmp NEW: GNU ext.
3563 svcauthdes_stats NEW: Secure RPC
3564 svcunix_create NEW: sunrpc etx
3565 svcunixfd_create NEW: sunrpc ext
3566 swapcontext NEW: Unix98
3567 tcgetsid NEW: Unix98 PTY
3568 tdestroy NEW: GNU ext.
3569 tgamma NEW: ISO C 9x
3570 tgammaf NEW: ISO C 9x
3571 tgammal NEW: ISO C 9x
3575 truncf NEW: ISO C 9x
3576 truncl NEW: ISO C 9x
3578 unlockpt NEW: Unix98 PTY
3579 updwtmpx NEW: Unix98
3580 user2netname NEW: Secure RPC
3581 utmpxname NEW: Unix98
3582 versionsort NEW: GNU ext.
3583 versionsort64 NEW: GNU ext.
3585 wcscasecmp NEW: GNU ext.
3586 wcsncasecmp NEW: GNU ext.
3587 wcsnlen NEW: GNU ext.
3588 wcstoimax NEW: ISO C 9x
3589 wcstoll NEW: ISO C 9x
3590 wcstoull NEW: ISO C 9x
3591 wcstoumax NEW: ISO C 9x
3593 wordexp NEW: POSIX.2
3594 wordfree NEW: POSIX.2
3595 write_profiling REMOVED
3596 xdecrypt NEW: Secure RPC
3597 xdr_authdes_cred NEW: Secure RPC
3598 xdr_authdes_verf NEW: Secure RPC
3599 xdr_cryptkeyarg NEW: Secure RPC
3600 xdr_cryptkeyarg2 NEW: Secure RPC
3601 xdr_cryptkeyres NEW: Secure RPC
3602 xdr_getcredres NEW: Secure RPC
3603 xdr_key_netstarg NEW: Secure RPC
3604 xdr_key_netstres NEW: Secure RPC
3605 xdr_keybuf NEW: Secure RPC
3606 xdr_keystatus NEW: Secure RPC
3607 xdr_netnamestr NEW: Secure RPC
3608 xdr_sizeof NEW: Secure RPC
3609 xdr_unixcred NEW: sunrpc ext
3610 xencrypt NEW: Secure RPC
3611 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3622 * inet_ntoa is thread-safe
3624 * updwtmp is moved from libutil to libc
3626 * rewrite of cbrt function
3628 * update of timezone data
3642 * add atoll function
3644 * fix complex problems in Berkeley DB code
3646 * fix math functions
3650 * fixed lots of header problems (especially Linux/GNU specific)
3652 * dynamic loader preserves all registers
3654 * Roland McGrath provided support for handling of auxiliary objects in
3655 the ELF dynamic loader.
3657 * support for parallel builds is improved
3661 * GNU extensions are no longer declared by default. To enable them you
3662 must define the macro `_GNU_SOURCE' in your program or compile with
3665 * The library has changed from using GNU ld symbol aliases to using weak
3666 symbols where available. The ELF object file format supports weak
3667 symbols; GNU ld also supports weak symbols in the a.out format. (There
3668 is also now support for other GNU ld extensions in ELF. Use the
3669 `--with-elf' option to configure to indicate you have ELF, and
3670 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3671 of many files which contained only symbol aliases, reducing the size of
3672 the source and the compiled library; many other files were renamed to
3673 less cryptic names previously occupied by the symbol alias files.
3674 There is a new header file <elf.h> for programs which operate on
3675 files in the ELF format.
3677 * Converted to Autoconf version 2, so `configure' has more options.
3678 Run `configure --help' to see the details.
3680 * The library can now be configured to build profiling, highly-optimized
3681 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3682 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3683 `configure' enable building these extra libraries. The shared library is
3684 built by default when using both ELF and GNU ld. When shared libraries
3685 are enabled, the new library `-ldl' is available for arbitrary run-time
3686 loading of shared objects; its interface is defined in <dlfcn.h>. The
3687 new header file <link.h> gives access to the internals of the run-time
3688 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3689 application of same name on other systems and it provides information
3690 about dynamically linked binaries.
3692 * The C library now provides the run-time support code for profiling
3693 executables compiled with `-pg'. Programs can control the profiling code
3694 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3695 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3696 the support for this file format was contributed by David Mosberger-Tang.
3698 * The math code has been replaced with a math library based on fdlibm from
3699 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3700 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3701 functions. The math functions now reside in a separate library, so
3702 programs using them will need to use `-lm' their linking commands.
3704 * John C. Bowman contributed optimized ix87 assembler inline functions.
3706 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3707 mechanism similar to that found in Solaris 2. This is now used for the
3708 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3709 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3710 file controls what services are used for each individual database. This
3711 works by loading shared libraries with names specified in `nsswitch.conf',
3712 so service modules can be changed or added at any time without even
3713 relinking any program. Currently there are the file, db, and NIS based
3714 NSS services available.
3716 * The new functions `strtoq' and `strtouq' parse integer values from
3717 strings, like `strtol' and `strtoul', but they return `long long int' and
3718 `unsigned long long int' values, respectively (64-bit quantities).
3720 * The new functions `strtof' and `strtold' parse floating-point values from
3721 strings, like `strtod', but they return `float' and `long double' values,
3722 respectively (on some machines `double' and `long double' are the same).
3724 * Ulrich Drepper has contributed new implementations of the floating-point
3725 printing and reading code used in the `printf' family of functions and
3726 `strtod', `strtof', and `strtold'. These new functions are perfectly
3727 accurate, and much faster than the old ones.
3729 * The implementation of the POSIX locale model was completely rewritten by
3730 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3731 to compile the POSIX locale definition.
3733 * The former dummy implementations of the strcoll and strxfrm function are
3734 now replaced by fully functional code contributed by Ulrich Drepper. The
3735 collation information comes from the POSIX locale definitions.
3737 * The new header <langinfo.h> defines an interface for accessing
3738 various locale-dependent data (using the locale chosen with `setlocale').
3740 * Ulrich Drepper has contributed a new suite of functions for operation on
3741 wide-character and multibyte-character strings, in <wchar.h>;
3742 and classification and case conversion of wide characters, in <wctype.h>.
3743 These new functions are conforming to the ISO C, Amendement 1 specification.
3745 * There is now a second implementation of the standard I/O library available.
3746 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3747 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3749 * You can now use positional parameter specifications in format strings
3750 for the `printf' and `scanf' families of functions. For example,
3751 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3752 ``Number 6, Mr Jones''. This is mainly useful when providing different
3753 format strings for different languages, whose grammars may dictate
3754 different orderings of the values being printed. To support this
3755 feature, the interface for `register_printf_handler' has changed; see
3756 the header file <printf.h> for details.
3758 * The `printf' and `scanf' families of functions now understand a new
3759 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3760 to group numbers as indicated by the locale; for `scanf' and friends, this
3761 says to accept as valid only a number with all the proper grouping
3762 separators in the right places. In the default "C" locale, numbers are
3763 not grouped; but locales for specific countries will define the usual
3764 conventions (i.e. separate thousands with `,' in the US locale).
3766 * The pgrp functions have been regularized, slightly incompatibly but much
3767 less confusingly. The core functions are now `getpgid' and `setpgid',
3768 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3769 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3770 provided for compatibility. There is no longer an incompatible `getpgrp'
3771 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3773 * The new header file <fts.h> and suite of functions simplify programs that
3774 operate on directory trees. This code comes from 4.4 BSD.
3776 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3777 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3778 NSS scheme used in glibc.
3780 * There is a new malloc debugging hook `__memalign_hook'.
3782 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3783 `unsigned int' in <sys/types.h>. These are for compatibility only and
3784 their use is discouraged.
3786 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3787 done differently, so that it works even without GNU ld.
3789 * New function `euidaccess' checks allowed access to a file like `access',
3790 but using the effective IDs instead of the real IDs.
3792 * The time zone data files have been updated for the latest and greatest
3793 local time conventions of the countries of the world.
3795 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3798 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3799 for formatting floating-point numbers. They are provided only for
3800 compatibility; new programs should use `sprintf' instead. There are
3801 also equivalent function for the `long double' floating-point type and
3802 all functions also exist in a reentrant form.
3804 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3805 functions for maintaining the login-record files (primarily of use to
3806 system programs such as `login'), and convenient functions for
3807 allocating and initializing a pseudo-terminal (pty) device.
3809 * Ulrich Drepper has contributed new support for System V style
3810 shared memory and IPC on systems that support it.
3812 * Ulrich Drepper has contributed several miscellaneous new functions found
3813 in System V: The `hsearch' family of functions provide an effective
3814 implementation of hash tables; `a64l' and `l64a' provide a very simple
3815 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3818 * Ulrich Drepper has contributed new reentrant counterparts for the
3819 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3821 * Ulrich Drepper has contributed new, highly-optimized versions of several
3822 string functions for the i486/Pentium family of processors.
3824 * Ulrich Drepper has updated the Linux-specific code, based largely
3825 on work done in Hongjiu Lu's version of GNU libc for Linux.
3826 The GNU library now supports Linux versions 2.0.10 and later,
3827 using the ELF object file format (i[3456]86-*-linux).
3829 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3831 * David Mosberger-Tang and Richard Henderson have ported the C library
3832 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
3833 dynamic linking support for ELF/Alpha.
3835 * Richard Henderson contributed several Alpha optimized assembler function
3836 for arithmetic and string handling.
3838 * Ulrich Drepper has contributed a new set of message catalog functions to
3839 support multiple languages using the <libintl.h> interface, for use with
3840 his new package GNU gettext. Translation volunteers have contributed
3841 catalogs of the library's messages in Spanish, German, and Korean.
3843 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
3844 program and the `catgets' function for reading the catalog files it
3845 creates. (The <libintl.h> interface is preferred; we include the
3846 <nl_types.h> interface using `catgets' only for source compatibility with
3847 programs already written to use it.)
3849 * New header file <values.h> gives SVID-compatible names for <limits.h>
3852 * Various new macros, declarations, and small header files for compatibility
3855 * New function `group_member' is a convenient way to check if a process has
3856 a given effective group ID.
3858 * When using GCC 2.7 and later, the socket functions are now declared in a
3859 special way so that passing an argument of type `struct sockaddr_in *',
3860 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
3861 `struct sockaddr *' type, does not generate a type-clash warning.
3863 * New function `error' declared in header file <error.h> is a convenient
3864 function for printing error messages and optionally exiting; this is the
3865 canonical function used in GNU programs. The new functions `err', `warn',
3866 and friends in header file <err.h> are the canonical 4.4 BSD interface for
3867 doing the same thing.
3869 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
3870 POSIX.2 `glob' function to do ~ and {...} expansion.
3872 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
3873 `clearenv' which is used in POSIX.9 is also available.
3875 * New function `getsid' returns session ID number on systems that support it.
3877 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
3878 files <db.h> and <mpool.h> provide a rich set of functions for several
3879 types of simple databases stored in memory and in files, and <ndbm.h> is
3880 an old `ndbm'-compatible interface using the `db' functions. Link with
3881 `-ldb' to get these functions.
3883 * New macro `strdupa' copies a string like `strdup', but uses local stack
3884 space from `alloca' instead of dynamic heap space from `malloc'.
3886 * New function `strnlen' is like `strlen' but searches only a given maximum
3887 number of characters for the null terminator. `stpncpy', `strndup' and
3888 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
3891 * New function `statfs' in header <sys/statfs.h>.
3893 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
3894 provide convenient functions for operating on blocks of null-terminated
3897 * A new suite of functions in <utmp.h> handle all the details of reading
3898 and writing the utmp file.
3900 * An implementation of the NIS/YP(tm) based NSS service was contributed by
3903 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
3904 completely POSIX compliant and also implemented the extended functionality
3905 to handle alternate digit representation and alternate era date formats.
3907 * Ulrich Drepper provided an implementation of the `strptime' function
3908 defined in XPG4.2 which transforms a string into a `struct tm' value.
3910 * Paul Eggert provided the tzselect shell script as part of the timezone
3911 code. The shell script makes it easy to select the correct timezone
3914 * The implementation of the malloc family of functions is completely replaced
3915 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
3916 The implementation uses the mmap function (if available) and it is
3917 optimized for the use in multi threaded programs.
3919 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
3920 functions. This new functionality is usable by specifying a special
3921 salt string and it is compatible with implementation on *BSD systems.
3923 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
3924 `getsubopt' to handle second level command line options, `bsd_signal'
3925 to access BSD style `signal' functionality, the obsolete `regexp' style
3928 * the `lchown' function is available on system which support this
3931 * The implementation of the shadow password handling function was contributed
3934 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
3936 * POSIX.1g support was added. The <sys/select.h> header is available,
3937 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
3938 implementation of `getaddrinfo'.
3942 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
3944 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
3945 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
3947 * The new function `daemon' from 4.4 BSD is useful for server programs that
3948 want to put themselves in the background.
3950 * Joel Sherrill has contributed support for several standalone boards that
3951 run without an operating system.
3953 * `printf', `scanf' and friends now accept a `q' type modifier for long
3954 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
3956 * All of the code taken from BSD (notably most of the math and networking
3957 routines) has been updated from the BSD 4.4-Lite release.
3959 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
3961 * The new functions `getdomainname' and `setdomainname' fetch or change the
3962 YP/NIS domain name. These are system calls which exist on systems which
3965 * The time zone data files have been updated for the latest international
3968 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
3969 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
3973 * The C library now includes support for Sun RPC, from Sun's free
3974 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
3975 are included. (There is still no support for YP.)
3977 * Tom Quinn has contributed a port of the C library to SGI machines running
3978 Irix 4 (mips-sgi-irix4).
3980 * The new `lockf' function is a simplified interface to the locking
3981 facilities of `fcntl', included for compatibility.
3983 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
3985 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
3987 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
3990 * The error message printed by `assert' for a failed assertion now includes
3991 the name of the program (if using GNU ld) and the name of the calling
3992 function (with versions of GCC that support this).
3994 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
3996 * The library now includes the <sys/mman.h> header file and memory
3997 management functions `mmap', `munmap', `mprotect', `msync', and
3998 `madvise', on systems that support those facilities.
4000 * The interface for `mcheck' has changed slightly: the function called to
4001 abort the program when an allocation inconsistency is detected now takes
4002 an argument that indicates the type of failure. The new function
4003 `mprobe' lets you request a consistency check for a particular block at
4004 any time (checks are normally done only when you call `free' or `realloc'
4007 * It is now possible to easily cross-compile the C library, building on one
4008 system a library to run on another machine and/or operating system. All
4009 you need to do is set the variable `HOST_CC' in `configparms' to the
4010 native compiler for programs to run on the machine you are building on (a
4011 few generator programs are used on Unix systems); set `CC' to the
4014 * The new function `fexecve' (only implemented on the GNU system) executes
4015 a program file given a file descriptor already open on the file.
4019 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4020 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4022 * You can set the variable `libprefix' in `configparms' to specify a prefix
4023 to be prepended to installed library files; this makes it easy to install
4024 the GNU C library to be linked as `-lgnuc' or whatever.
4026 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4027 copies a limited number of characters from a string, and returns the
4028 address of the last character written.
4030 * You no longer need to check for whether the installed `stddef.h' is
4031 compatible with the GNU C library. configure now checks for you.
4033 * You can now define a per-stream `fileno' function to convert the
4034 stream's cookie into an integral file descriptor.
4036 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4037 allocates zero bytes of storage, and returns a unique pointer which
4038 you can pass to `realloc' or `free'. The behavior is undefined if
4039 you dereference this pointer.
4041 * The C library now runs on Sony NEWS m68k machines running either
4042 NewsOS 3 or NewsOS 4.
4044 * The new `syscall' function is a system-dependent primitive function
4045 for invoking system calls. It has the canonical behavior on Unix
4046 systems, including unreliable return values for some calls (such as
4047 `pipe', `fork' and `getppid').
4049 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4050 to `EAGAIN', which is the preferred name. On systems whose kernels
4051 use two distinct codes, the C library now translates EWOULDBLOCK to
4052 EAGAIN in every system call function.
4056 * The GNU C Library Reference Manual is now distributed with the library.
4057 `make dvi' will produce a DVI file of the printed manual.
4058 `make info' will produce Info files that you can read on line using C-h i
4059 in Emacs or the `info' program.
4060 Please send comments on the manual to bug-glibc-manual@gnu.org.
4062 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4064 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4066 * Jason Merrill has contributed a port to the Sequent Symmetry running
4067 Dynix version 3 (i386-sequent-dynix).
4069 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4070 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4072 * New function `memory_warnings' lets you arrange to get warnings when
4073 malloc is running out of memory to allocate, like Emacs gives you.
4075 * The C library now contains the relocating allocator used in Emacs 19 for
4076 its editing buffers. This allocator (ralloc) minimizes allocation
4077 overhead and fragmentation by moving allocated regions around whenever it
4078 needs to. You always refer to a ralloc'd region with a "handle" (a
4079 pointer to a pointer--an object of type `void **').
4081 * There is a new `printf' format: `%m' gives you the string corresponding
4082 to the error code in `errno'.
4084 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4085 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4086 pass, the `a' modifier says to fill in a `char **' you pass with a
4089 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4090 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4091 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4093 * `mkstemp' is a traditional Unix function to atomically create and open a
4094 uniquely-named temporary file.
4098 * The standard location for the file that says what the local timezone is
4099 has changed again. It is now `/usr/local/etc/localtime' (or more
4100 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4102 * The distribution no longer contains any files with names longer than 14
4105 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4106 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4108 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4112 * The configuration process has changed quite a bit. The `configure'
4113 script is now used just like the configuration scripts for other GNU
4114 packages. The `sysdeps' directory hierarchy is much rearranged.
4115 The file `INSTALL' explains the new scheme in detail.
4117 * The header files no longer need to be processed into ANSI C and
4118 traditional C versions. There is just one set of files to install, and
4119 it will work with ANSI or old C compilers (including `gcc -traditional').
4121 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4122 MIPS DECStation running Ultrix 4.
4124 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4125 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4126 made itself into a shared library.
4128 * Yet further improved support for the i386, running 4.3 BSD-like systems
4129 (such as Mach 3 with the Unix single-server), or System V.
4131 * New function `strncasecmp' to do case-insensitive string comparison
4132 with limited length.
4134 * New function `strsep' is a reentrant alternative to `strtok'.
4136 * New functions `scandir' and `alphasort' for searching directories.
4138 * New function `setenv' is a better interface to `putenv'.
4140 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4141 function for traversing a directory tree.
4143 * The GNU obstack package is now also part of the C library.
4144 The new function `open_obstack_stream' creates a stdio stream that
4145 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4146 formatted output directly to an obstack.
4148 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4149 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4151 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4153 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4154 things to your strings.
4156 * There are some new test programs: test-fseek, testmb, and testrand.
4158 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4159 These ports are not finished, but are a good starting place for really
4160 supporting those systems.
4162 * `/etc/localtime' is now the standard location for the file that says what
4163 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4164 This follows the general principle that `/etc' is the place for all local
4165 configuration files.
4167 * The C library header files now use `extern "C"' when used by the C++
4168 compiler, so the C library should now work with C++ code.
4170 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4171 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4174 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4175 function which uses the `merge sort' algorithm, and is said to be
4176 significantly faster than the old GNU `qsort' function. Merge sort is
4177 now the standard `qsort' function. The new algorithm can require a lot
4178 of temporary storage; so, the old sorting function is called when the
4179 required storage is not available.
4181 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4182 provides the Unix `crypt' function, plus some other entry points.
4184 * The code and header files taken from 4.4 BSD have been updated with the
4185 latest files released from Berkeley.
4187 ----------------------------------------------------------------------
4188 Copyright information:
4190 Copyright (C) 1992-2017 Free Software Foundation, Inc.
4192 Permission is granted to anyone to make or distribute verbatim copies
4193 of this document as received, in any medium, provided that the
4194 copyright notice and this permission notice are preserved,
4195 thus giving the recipient permission to redistribute in turn.
4197 Permission is granted to distribute modified versions
4198 of this document, or of portions of it,
4199 under the above conditions, provided also that they
4200 carry prominent notices stating who last changed them.
4203 version-control: never