1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2018 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * <math.h> functions that round their results to a narrower type are added
13 from TS 18661-1:2014 and TS 18661-3:2015:
15 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
18 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
21 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
24 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
27 * Nominative and genitive month names are now supported for the Catalan and
28 Czech languages. The Catalan and Greek languages now support abbreviated
29 alternative month names.
31 * Building and running on GNU/Hurd systems now works without out-of-tree
34 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
35 library if installed. libidn2 version 2.0.5 or later is recommended. If
36 libidn2 is not available, internationalized domain names are not encoded
37 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
38 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
39 with an encoding error.) Flags which used to change the IDN encoding and
40 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
41 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
42 deprecated. They no longer have any effect.
44 Deprecated and removed features, and other changes affecting compatibility:
46 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
47 installed. Software that was using either header should be updated to
48 use standard <stdio.h> interfaces instead.
50 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
51 This was never required by the C standard, and the macros just expanded
52 to call alternative names for the same functions. If you hoped getc and
53 putc would provide performance improvements over fgetc and fputc, instead
54 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
55 necessary, flockfile and funlockfile.
57 * All stdio functions now treat end-of-file as a sticky condition. If you
58 read from a file until EOF, and then the file is enlarged by another
59 process, you must call clearerr or another function with the same effect
60 (e.g. fseek, rewind) before you can read the additional data. This
61 corrects a longstanding C99 conformance bug. It is most likely to affect
62 programs that use stdio to read interactive input from a terminal.
65 * The macros 'major', 'minor', and 'makedev' are now only available from
66 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
67 headers that happen to include <sys/types.h>. These macros are rarely
68 used, not part of POSIX nor XSI, and their names frequently collide with
69 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
72 <sys/sysmacros.h> is a GNU extension. Portable programs that require
73 these macros should first include <sys/types.h>, and then include
74 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
76 * The tilegx*-*-linux-gnu configurations are no longer supported.
78 * The obsolete function ustat is no longer available to newly linked
79 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
80 function has been deprecated in favor of fstatfs and statfs.
82 * The obsolete function nfsservctl is no longer available to newly linked
83 binaries. This function was specific to systems using the Linux kernel
84 and could not usefully be used with the GNU C Library on systems with
85 version 3.1 or later of the Linux kernel.
87 * The obsolete function name llseek is no longer available to newly linked
88 binaries. This function was specific to systems using the Linux kernel
89 and was not declared in a header. Programs should use the lseek64 name
90 for this function instead.
92 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
93 getaddrinfo and getnameinfo functions have been deprecated. The behavior
94 previously selected by them is now always enabled.
96 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
97 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
98 restriction (rejecting '_' in host names, among other things) has been
99 removed, for increased compatibility with non-IDN name resolution.
101 Changes to build and runtime requirements:
103 [Add changes to build and runtime requirements here]
105 Security related changes:
107 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
108 been fixed by removing the glibc-internal IDNA implementation and using
109 the system-provided libidn2 library instead. Originally reported by Hanno
110 Böck and Christian Weisgerber.
112 CVE-2017-18269: An SSE2-based memmove implementation for the i386
113 architecture could corrupt memory. Reported by Max Horn.
115 CVE-2018-11236: Very long pathname arguments to realpath function could
116 result in an integer overflow and buffer overflow. Reported by Alexey
119 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
120 architecture could write beyond the target buffer, resulting in a buffer
121 overflow. Reported by Andreas Schwab.
123 The following bugs are resolved with this release:
125 [The release manager will add the list generated by
126 scripts/list-fixed-bugs.py just before the release.]
133 * The GNU C Library can now be compiled with support for building static
134 PIE executables (See --enable-static-pie in INSTALL). These static PIE
135 executables are like static executables but can be loaded at any address
136 and provide additional security hardening benefits at the cost of some
137 memory and performance. When the library is built with --enable-static-pie
138 the resulting libc.a is usable with GCC 8 and above to create static PIE
139 executables using the GCC option '-static-pie'. This feature is currently
140 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
141 aarch64 with binutils 2.30 or later.
143 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
144 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
147 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
149 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
151 * In order to support faster and safer process termination the malloc API
152 family of functions will no longer print a failure address and stack
153 backtrace after detecting heap corruption. The goal is to minimize the
154 amount of work done after corruption is detected and to avoid potential
155 security issues in continued process execution. Reducing shutdown time
156 leads to lower overall process restart latency, so there is benefit both
157 from a security and performance perspective.
159 * The abort function terminates the process immediately, without flushing
160 stdio streams. Previous glibc versions used to flush streams, resulting
161 in deadlocks and further data corruption. This change also affects
162 process aborts as the result of assertion failures.
164 * On platforms where long double has the IEEE binary128 format (aarch64,
165 alpha, mips64, riscv, s390 and sparc), the math library now implements
166 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
167 These are the same interfaces added in version 2.26 for some platforms where
168 this format is supported but is not the format of long double.
170 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
171 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
172 implements interfaces for that type, as defined by ISO/IEC TS
173 18661-3:2015. These are corresponding interfaces to those supported for
176 * The math library now implements interfaces for the _Float32, _Float64 and
177 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
178 corresponding interfaces to those supported for _Float128.
180 * glibc now implements the memfd_create and mlock2 functions on Linux.
182 * Support for memory protection keys was added. The <sys/mman.h> header now
183 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
186 * The copy_file_range function was added.
188 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
190 * The ldconfig utility now processes `include' directives using the C/POSIX
191 collation ordering. Previous glibc versions used locale-specific
192 ordering, the change might break systems that relied on that.
194 * Support for two grammatical forms of month names has been added.
195 In a call to strftime, the "%B" and "%b" format specifiers will now
196 produce the grammatical form required when the month is used as part
197 of a complete date. New "%OB" and "%Ob" specifiers produce the form
198 required when the month is named by itself. For instance, in Greek
199 and in many Slavic and Baltic languages, "%B" will produce the month
200 in genitive case, and "%OB" will produce the month in nominative case.
202 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
203 are all valid and will all accept any known form of month
204 name---standalone or complete, abbreviated or full. In a call to
205 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
206 the strings used by "%B" and "%b", respectively. New query
207 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
208 used by "%OB" and "%Ob", respectively.
210 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
211 define the strings for %OB and %Ob, respectively; these have the
212 same syntax as "mon" and "abmon". These arrays are optional; if they
213 are not provided then they have the same content as "mon" and "abmon",
216 These features are provided for locales which define "alt_mon" and/or
217 "ab_alt_mon" in their locale source data. This release includes such
218 alternative month name data for the following languages: Belarusian,
219 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
221 This feature is currently a GNU extension, but it is expected to
222 be added to the next revision of POSIX, and it is also already
223 available on some BSD-derived operating systems.
225 This feature will cause existing statically compiled applications
226 to fail to load locales and fall back to the builtin C/POSIX locales.
227 See notes below for other changes affecting compatibility.
229 * Support for the RISC-V ISA running on Linux has been added. This port
230 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
231 for the following ISA and ABI pairs:
237 Deprecated and removed features, and other changes affecting compatibility:
239 * Statically compiled applications attempting to load locales compiled for the
240 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
241 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
242 support for two grammatical forms of the month names, also extends the locale
243 data binary format. Static applications needing locale support must be
244 recompiled to match the runtime and data they are deployed with. In some
245 distributions there is an upgrade window where dynamically linked applications
246 may use a new library but the old locale data and also fall back to the
247 builtin C/POSIX locales; restarting the application process is sufficient to
250 * Support for statically linked applications which call dlopen is deprecated
251 and will be removed in a future version of glibc. Applications which call
252 dlopen need to be linked dynamically instead.
254 * Support for old programs which use internal stdio data structures and
255 functions is deprecated. This includes programs which use the C++ streams
256 provided by libstdc++ in GCC 2.95. Programs which use the internal
257 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
258 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
259 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
260 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
261 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
262 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
263 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
264 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
265 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
266 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
267 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
268 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
269 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
270 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
271 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
272 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
273 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
274 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
275 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
276 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
277 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
278 future version of glibc. Unlike other symbol removals, these old
279 applications will not be supported using compatibility symbols.
281 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
282 defined by <sys/ptrace.h>.
284 * libm no longer supports SVID error handling (calling a user-provided
285 matherr function on error) or the _LIB_VERSION variable to control error
286 handling. (SVID error handling and the _LIB_VERSION variable still work
287 for binaries linked against older versions of the GNU C Library.) The
288 libieee.a library is no longer provided. math.h no longer defines struct
289 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
290 TLOSS, PLOSS and HUGE.
292 * The libm functions pow10, pow10f and pow10l are no longer supported for
293 new programs. Programs should use the standard names exp10, exp10f and
294 exp10l for these functions instead.
296 * The mcontext_t type is no longer the same as struct sigcontext. On
297 platforms where it was previously the same, this changes the C++ name
298 mangling for interfaces involving this type.
300 * The add-ons mechanism for building additional packages at the same time as
301 glibc has been removed. The --enable-add-ons configure option is now
304 * The --without-fp configure option is now ignored. Whether hardware
305 floating-point instructions are used is now configured based on whether
306 the compiler used at configure time (without any options implied by a
307 --with-cpu= configure option) uses such instructions.
309 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
310 the specified string can be parsed as a domain name.
312 * In the malloc_info output, the <heap> element may contain another <aspace>
313 element, "subheaps", which contains the number of sub-heaps.
315 * The libresolv function p_secstodate is no longer supported for new
318 * The tilepro-*-linux-gnu configuration is no longer supported.
320 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
321 and will be removed in a future release. Software that is still using
322 either header should be updated to use standard <stdio.h> interfaces
325 libio.h was originally the header for a set of supported GNU extensions,
326 but they have not been maintained as such in many years, they are now
327 standing in the way of improvements to stdio, and we don't think there are
328 any remaining external users. _G_config.h was never intended for public
329 use, but predates the bits convention.
331 Changes to build and runtime requirements:
333 * bison version 2.7 or later is required to generate code in the 'intl'
336 Security related changes:
338 CVE-2009-5064: The ldd script would sometimes run the program under
339 examination directly, without preventing code execution through the
340 dynamic linker. (The glibc project disputes that this is a security
341 vulnerability; only trusted binaries must be examined using the ldd
344 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
345 suffered from a one-byte overflow during ~ operator processing (either
346 on the stack or the heap, depending on the length of the user name).
347 Reported by Tim Rühsen.
349 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
350 would sometimes fail to free memory allocated during ~ operator
351 processing, leading to a memory leak and, potentially, to a denial
354 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
355 without GLOB_NOESCAPE, could write past the end of a buffer while
356 unescaping user names. Reported by Tim Rühsen.
358 CVE-2017-17426: The malloc function, when called with an object size near
359 the value SIZE_MAX, would return a pointer to a buffer which is too small,
360 instead of NULL. This was a regression introduced with the new malloc
361 thread cache in glibc 2.26. Reported by Iain Buclaw.
363 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
364 to the allocation of too much memory. (This is not a security bug per se,
365 it is mentioned here only because of the CVE assignment.) Reported by
368 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
369 of the number of search path components. (This is not a security
370 vulnerability per se because no trust boundary is crossed if the fix for
371 CVE-2017-1000366 has been applied, but it is mentioned here only because
372 of the CVE assignment.) Reported by Qualys.
374 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
375 for AT_SECURE or SUID binaries could be used to load libraries from the
378 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
379 succeeds without returning an absolute path due to unexpected behaviour
380 of the Linux kernel getcwd syscall. Reported by halfdog.
382 CVE-2018-6485: The posix_memalign and memalign functions, when called with
383 an object size near the value of SIZE_MAX, would return a pointer to a
384 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
386 CVE-2018-6551: The malloc function, when called with an object size near
387 the value of SIZE_MAX, would return a pointer to a buffer which is too
388 small, instead of NULL.
390 The following bugs are resolved with this release:
392 [866] glob: glob should match dangling symlinks
393 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
394 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
396 [5997] math: Very slow execution of sinf function
397 [10580] localedata: hr_HR: updated locale
398 [10871] locale: 'mon' array should contain both nominative and genitive
400 [12349] localedata: eu_ES: incorrect thousands separator
401 [13605] localedata: shn_MM: new Shan locale
402 [13805] localedata: ru_RU: currency should use ',' as radix point
403 [13953] localedata: km_KH: locale update
404 [13994] localedata: mjw_IN: new locale
405 [14121] build: make writes .mo files in po directory
406 [14333] libc: Fix the race between atexit() and exit()
407 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
408 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
410 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
411 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
412 width Latin characters
413 [15332] localedata: es_CU: locale update
414 [15436] stdio: Don't close or flush stdio streams on abort
415 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
417 [16148] localedata: ca_ES: incorrect thousands separator
418 [16750] dynamic-link: ldd should not try to execute the binaries
420 [16777] localedata: pl_PL: incorrect thousands separator in locale
421 [16905] localedata: hanzi: new collation
422 [17563] localedata: cmn_TW: add hanzi collation
423 [17750] localedata: wrong collation order of diacritics in most locales
424 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
426 [17956] build: Build fails on missing definitions from header file
427 nss/nss.h when Mozilla NSS is used for cryptography
428 [18203] libc: realpath() does not handle unreachable paths correctly
429 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
430 [18812] localedata: kab_DZ: new Kabyle Algeria locale
431 [18822] libc: Internal functions are called via PLT
432 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
433 [19170] libc: __gmon_start__ defined in hppa in crtn.S
434 [19574] libc: glibc should support building static PIE binaries
435 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
437 [19971] glob: glob: Do not skip entries with zero d_ino values
438 [19982] localedata: fr.po: spelling mistake for error code EXDEV
439 [20008] localedata: km_KH: convert to translit_neutral
440 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
441 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
442 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
443 [20482] localedata: de_CH: abbreviated weekdays should be two letters
444 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
446 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
447 they're set, wrong errors returned by gaih_inet when lookup functions
449 [20756] localedata: [PATCH] Use Unicode wise thousands separator
450 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
452 [20952] localedata: yuw_PG: new locale
453 [21084] localedata: charmaps/IBM858: new codepage
454 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
455 [21242] libc: assert gives pedantic warning in old gcc versions
456 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
457 __regcall calling convention
458 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
459 [21326] libc: C99 functions are not declared for C++11 and later if
460 _GNU_SOURCE is not predefined by g++
461 [21457] libc: sys/ucontext.h namespace
462 [21530] libc: tmpfile() should be implemented using O_TMPFILE
463 [21660] math: GCC fails to compile a formula with tgmath.h
464 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
465 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
466 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
467 [21684] math: tgmath.h handling of complex integers
468 [21685] math: tgmath.h handling of bit-fields
469 [21686] math: tgmath.h handling of __int128
470 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
472 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
474 [21750] localedata: column width of characters incompatible with classical
476 [21754] malloc: malloc: Perform as little work as possible after heap
477 consistency check failures
478 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
479 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
480 [21791] string: Unused XXX_chk_XXX functions in libc.a
481 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
483 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
485 [21845] localedata: Added new Locale bho_NP
486 [21853] localedata: Fix abday Which looks same as day in zh_SG
487 [21854] localedata: Added New Locale en_SC
488 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
489 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
490 _dl_runtime_resolve_avx_slow
491 [21885] network: getaddrinfo: gethosts does not release resolver context
492 on memory allocation failure
493 [21899] libc: XPG4.2 sigaction namespace
494 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
496 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
498 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
499 errno value, causing getaddrinfo to fail
500 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
501 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
502 instead of EAI_NODATA
503 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
504 constant PTRACE_SEIZE_DEVEL
505 [21930] math: C-only gcc builtins used in <math.h> isinf
506 [21932] network: Unpaired __resolv_context_get in generic get*_r
508 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
509 [21944] libc: sigval namespace
510 [21951] localedata: Update hanzi collation by stroke
511 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
512 sysdeps/x86_64/fpu/e_expf.S
513 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
514 allocation in syscall loops)
515 [21959] localedata: Fix Country name for xh_ZA
516 [21960] localedata: Fix abmon for bem_ZM
517 [21966] math: AVX2 mathvec functions use FMA without checking
518 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
519 [21971] localedata: Added New Locale for mfe_MU
520 [21972] libc: assert macro requires operator== (int) for its argument type
521 [21973] math: [sparc] libm missing sqrtl compat symbol
522 [21974] libc: Remove __bb_init_func and __bb_exit_func
523 [21982] string: stratcliff.c: error: assuming signed overflow does not
525 [21986] stdio: __guess_grouping is called incorrectly
526 [21987] math: [sparc32] wrong bits/long-double.h installed
527 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
529 [22022] localedata: Missing country_name for mni_IN
530 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
532 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
534 [22026] locale: iconv_open: heap overflow on gconv_init failure
535 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
536 [22035] math: [m68k] bits/math-inline.h macro namespace
537 [22038] localedata: Fix abbreviated weeks and months for Somali
538 [22044] localedata: Remove redundant data for Limburgish Language
539 [22050] malloc: Linking with -lmcheck does not hook
540 __malloc_initialize_hook correctly
541 [22051] libc: zero terminator in the middle of glibc's .eh_frame
542 [22052] malloc: malloc failed to compile with GCC 7 and -O3
543 [22070] localedata: charmaps/UTF-8: wcwidth for
544 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
545 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
546 Jungseong and Jongseong) should be 0
547 [22078] nss: nss_files performance issue in multi mode
548 [22082] math: bits/math-finite.h exp10 condition
549 [22086] libc: pcprofiledump incorrect cross-endian condition
550 [22093] dynamic-link: ld.so no longer searches in .../x86_64
551 [22095] network: Name server address allocation memory leak in resolv.conf
553 [22096] network: __resolv_conf_attach can incorrectly free passed conf
555 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
556 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
558 [22111] malloc: malloc: per thread cache is not returned when thread exits
559 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
560 [22134] libc: [linux] implement fexecve with execveat
561 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
563 [22145] libc: ttyname() gives up too early in the face of namespaces
564 [22146] math: C++ build issue with float128 on x86_64
565 [22153] nptl: nptl: save error code before process termination
566 [22156] libc: [hppa,ia64,microblaze] Executable stack default
567 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
568 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
569 [22165] libc: [hppa] Text relocations in libc.so
570 [22180] libc: destructor registered via __cxa_atexit is called twice
571 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
572 symlinks") cause "make" segfaults
573 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
575 [22207] libc: FAIL: stdlib/test-atexit-race
576 [22225] math: nearbyint arithmetic moved before feholdexcept
577 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
578 [22235] math: iscanonical in C++ and float128
579 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
580 the svid compat wrapper
581 [22244] math: ynf and yn are wrong without the svid compat wrapper
582 [22273] libc: Improper assert in Linux posix_spawn implementation
583 [22284] libc: -pg -pie doesn't work
584 [22292] locale: localedef exits with error 4 when it should be error 1
585 [22294] locale: Allow "" for int_currency_symbol definition in locales.
586 [22295] locale: Don't warn on non-symbolic characters in locale sources in
588 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
589 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
591 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
592 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
593 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
594 [22322] libc: [mips64] wrong bits/long-double.h installed
595 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
596 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
598 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
599 [22343] malloc: Integer overflow in posix_memalign
600 [22347] libc: getrandom() returns the number of bytes that were copied to
601 the buffer even though the comments say "Return 0 on success and -1 on
603 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
604 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
606 [22370] dynamic-link: Incorrect note padding check
607 [22375] libc: malloc returns pointer from tcache_get when should return
608 NULL (CVE-2017-17426)
609 [22377] math: iseqsig, float128 and C++
610 [22382] localedata: Error in tpi_PG locale
611 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
612 inside the ASCII printable range
613 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
615 [22403] localedata: Slash needs escaping in some locales
616 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
617 [22409] network: res_hnok does not accept some host names used on the
619 [22412] network: res_dnok, res_hnok should perform syntax checks
620 [22413] network: ns_name_pton ignores syntactically invalid trailing
622 [22415] stdio: setvbuf can lead to invalid free/segfault
623 [22432] build: Non-deterministic build
624 [22439] malloc: malloc_info should compute summary statistics for all sub-
626 [22442] network: if_nametoindex could report index for the wrong
628 [22446] build: aliasing violation calling readlink in handle_request
629 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
630 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
631 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
632 __nscd_hash/__nss_hash
633 [22463] network: p_secstodate overflow handling
634 [22469] localedata: pl_PL LC_COLLATE does not use i18n
635 [22478] libc: sigwait can fail with EINTR
636 [22505] libc: ldconfig processes include directive in locale-specific
638 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
639 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
640 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
641 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
642 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
643 [22534] localedata: Collation rules for Serbian and Bosnian should be the
645 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
646 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
647 [22577] libc: missing newline after "cannot allocate TLS data structures
649 [22588] manual: manual/conf.texi: missing underscore in front of
651 [22593] math: nextafter and nexttoward are declared with const attribute
652 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
653 [22603] string: ia64 memchr overflows internal pointer check
654 [22605] libc: SH clone does not set the exit code correctly
655 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
657 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
658 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
659 modified in case of success
660 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
661 [22615] manual: manual: ambiguous wording about errno value in case of
663 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
665 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
666 binaries or if /proc is not mounted (CVE-2017-16997)
667 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
668 [22630] build: $(no-pie-ldflag) is no longer effective
669 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
670 [22635] nptl: pthread_self returns NULL before libpthread is loaded
671 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
672 [22637] nptl: guard size is subtracted from thread stack size instead of
674 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
675 [22657] localedata: hu_HU: Avoid double space in date
676 [22660] math: fmax, fmin sNaN handling on alpha
677 [22664] libc: New warning of GCC8
678 [22665] math: alpha: ceil and floor raise inexact exceptions
679 [22666] math: alpha: trunc raise inexact exceptions
680 [22667] libc: makecontext lacks stack alignment on i386
681 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
682 [22679] libc: getcwd(3) can succeed without returning an absolute path
684 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
686 [22687] math: [powerpc-nofpu] complex long double functions spurious
688 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
689 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
690 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
692 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
693 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
695 [22701] nis: Incomplete removal of libnsl
696 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
697 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
698 [22715] dynamic-link: FAIL: elf/tst-audit10
699 [22719] libc: Backtrace tests fail on hppa
700 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
701 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
702 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
703 before the first call to crypt_r () in crypt/badsalttest.c
710 * A per-thread cache has been added to malloc. Access to the cache requires
711 no locks and therefore significantly accelerates the fast path to allocate
712 and free small amounts of memory. Refilling an empty cache requires locking
713 the underlying arena. Performance measurements show significant gains in a
714 wide variety of user workloads. Workloads were captured using a special
715 instrumented malloc and analyzed with a malloc simulator. Contributed by
716 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
718 * Unicode 10.0.0 Support: Character encoding, character type info, and
719 transliteration tables are all updated to Unicode 10.0.0, using
720 generator scripts contributed by Mike FABIAN (Red Hat).
721 These updates cause user visible changes, especially the changes in
722 wcwidth for many emoji characters cause problems when emoji sequences
723 are rendered with pango, see for example:
724 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
726 * Collation of Hungarian has been overhauled and is now consistent with "The
727 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
730 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
732 - The GNU C Library will now detect when /etc/resolv.conf has been
733 modified and reload the changed configuration. The new resolver option
734 “no-reload” (RES_NORELOAD) disables this behavior.
736 - The GNU C Library now supports an arbitrary number of search domains
737 (configured using the “search” directive in /etc/resolv.conf);
738 previously, there was a hard limit of six domains. For backward
739 compatibility, applications that directly modify the ‘_res’ global
740 object are still limited to six search domains.
742 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
743 Library will now randomly pick a name server from the configuration as a
744 starting point. (Previously, the second name server was always used.)
746 * The tunables feature is now enabled by default. This allows users to tweak
747 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
749 * New function reallocarray, which resizes an allocated block (like realloc)
750 to the product of two sizes, with a guaranteed clean failure upon integer
751 overflow in the multiplication. Originally from OpenBSD, contributed by
752 Dennis Wölfing and Rüdiger Sonderfeld.
754 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
755 These are extended versions of preadv and pwritev, respectively, taking an
756 additional flags argument. The set of supported flags depends on the
757 running kernel; full support currently requires kernel 4.7 or later.
759 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
760 create a new session ID for the spawned process. This feature is
761 scheduled to be added to the next major revision of POSIX; for the time
762 being, it is available under _GNU_SOURCE.
764 * errno.h is now safe to use from C-preprocessed assembly language on all
765 supported operating systems. In this context, it will only define the
766 Exxxx constants, as preprocessor macros expanding to integer literals.
768 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
769 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
770 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
771 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
773 To compile programs that use this feature, the compiler must support
774 128-bit floating point with the type name _Float128 (as defined by TS
775 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
776 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
777 must be defined to make the new interfaces visible.
779 The new functions and macros correspond to those present for other
780 floating-point types (except for a few obsolescent interfaces not
781 supported for the new type), with F128 or f128 suffixes; for example,
782 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
783 printf or scanf formats for the new type; the strfromf128 and strtof128
784 interfaces should be used instead.
786 Deprecated and removed features, and other changes affecting compatibility:
788 * The synchronization that pthread_spin_unlock performs has been changed to
789 now be equivalent to a C11 atomic store with release memory order to the
790 spin lock's memory location. Previously, several (but not all)
791 architectures used stronger synchronization (e.g., containing what is
792 often called a full barrier). This change can improve performance, but
793 may affect odd fringe uses of spin locks that depend on the previous
794 behavior (e.g., using spin locks as atomic variables to try to implement
795 Dekker's mutual exclusion algorithm).
797 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
800 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
801 will only be built and installed when the GNU C Library is configured with
802 --enable-obsolete-rpc. This allows alternative RPC implementations, such
803 as TIRPC or rpcsvc-proto, to be used.
805 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
806 libnss_compat, are deprecated, and will not be built or installed by
809 The NIS(+) support library, libnsl, is also deprecated. By default, a
810 compatibility shared library will be built and installed, but not headers
811 or development libraries. Only a few NIS-related programs require this
812 library. (In particular, the GNU C Library has never required programs
813 that use 'gethostbyname' to be linked with libnsl.)
815 Replacement implementations based on TIRPC, which additionally support
816 IPv6, are available from <https://github.com/thkukuk/>. The configure
817 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
818 name service modules, to be built and installed.
820 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
821 support is enabled, the configured recursive resolver must support EDNS.
822 (Responding to EDNS-enabled queries with responses which are not
823 EDNS-enabled is fine, but FORMERR responses are not.)
825 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
826 servers have not supported this opcode for a long time.
828 * The _res_opcodes variable has been removed from libresolv. It had been
829 exported by accident.
831 * <string.h> no longer includes inline versions of any string functions,
832 as this kind of optimization is better done by the compiler. The macros
833 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
835 * The nonstandard header <xlocale.h> has been removed. Most programs should
836 use <locale.h> instead. If you have a specific need for the definition of
837 locale_t with no other declarations, please contact
838 libc-alpha@sourceware.org and explain.
840 * The obsolete header <sys/ultrasound.h> has been removed.
842 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
844 * The obsolete function cfree has been removed. Applications should use
847 * The stack_t type no longer has the name struct sigaltstack. This changes
848 the C++ name mangling for interfaces involving this type.
850 * The ucontext_t type no longer has the name struct ucontext. This changes
851 the C++ name mangling for interfaces involving this type.
853 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
854 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
855 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
856 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
857 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
858 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
859 fpregset_t type no longer has the name struct fpu. This changes the C++
860 name mangling for interfaces involving those types.
862 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
863 synced with the kernel:
865 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
866 are not supported on this architecture and have been removed.
868 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
869 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
870 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
872 Programs that assume the GET/SETREGS ptrace requests are universally
873 available will now fail to build, instead of malfunctioning at runtime.
875 Changes to build and runtime requirements:
877 * Linux kernel 3.2 or later is required at runtime, on all architectures
878 supported by that kernel. (This is a change from version 2.25 only for
881 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
883 * On most architectures, GCC 4.9 or later is required to build the GNU C
884 Library. On powerpc64le, GCC 6.2 or later is required.
886 Older GCC versions and non-GNU compilers are still supported when
887 compiling programs that use the GNU C Library. (We do not know exactly
888 how old, and some GNU extensions to C may be _de facto_ required. If you
889 are interested in helping us make this statement less vague, please
890 contact libc-alpha@sourceware.org.)
892 Security related changes:
894 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
895 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
897 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
898 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
900 * Avoid printing a backtrace from the __stack_chk_fail function since it is
901 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
904 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
905 fixed (CVE-2017-12133).
907 The following bugs are resolved with this release:
909 [984] network: Respond to changed resolv.conf in gethostbyname
910 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
911 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
913 [12189] libc: __stack_chk_fail should not attempt a backtrace
915 [14096] time: Race condition on timezone/tst-timezone.out
916 [14172] localedata: az_IR: new locale
917 [14995] build: glibc fails to build if gold is the default linker, even if
919 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
920 [16637] network: inet_pton function is accepting IPv6 with bad format
921 [16640] string: string/strtok.c: undefined behaviour inconsistent between
922 x86 and other generic code
923 [16875] localedata: ko_KR: fix lang_name
924 [17225] localedata: ar_SY: localized month names for May and June are
926 [17297] localedata: da_DK: wrong date_fmt string
927 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
928 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
929 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
930 [19066] localedata: ar_SA abbreviated day and month names are in English
931 [19569] network: resolv: Support an arbitrary number of search domains
932 [19570] network: Implement random DNS server selection in the stub
934 [19838] locale: localedef fails on PA-RISC
935 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
936 order of 0D36 and 0D37
937 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
939 [20098] libc: FAIL: debug/backtrace-tst on hppa
940 [20257] network: sunrpc: clntudp_call does not enforce timeout when
942 [20275] localedata: locale day/abday/mon/abmon should not have trailing
944 [20313] localedata: Update locale data to Unicode 9.0
945 [20424] manual: Document how to provide a malloc replacement
946 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
948 [20686] locale: Add el_GR@euro to SUPPORTED.
949 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
950 failures consistently
951 [21015] dynamic-link: Document and fix --enable-bind-now
952 [21016] nptl: pthread_cond support is broken on hppa
953 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
954 frame-pointer on i386
955 [21049] libc: segfault in longjmp_chk() due to clobbered processor
957 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
958 [21088] libc: Build fails with --enable-static-nss
959 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
960 generic c code is used
961 [21109] libc: Tunables broken on big-endian
962 [21112] math: powf has large ulp errors with base close to 1 and exponent
964 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
966 [21120] malloc: glibc malloc is incompatible with GCC 7
967 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
969 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
970 (-0.0) when linking with -lieee
971 [21171] math: log10, log2 and lgamma return incorrect results
972 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
973 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
974 [21207] localedata: ce_RU: update weekdays from CLDR
975 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
976 [21217] localedata: Update months from CLDR-31
977 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
978 [21243] libc: support_delete_temp_file should issue warning for failed
980 [21244] libc: support resolv_test_start() socket fd close should be
982 [21253] libc: localedef randomly segfaults when using -fstack-check due to
983 new posix_spawn implementation
984 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
985 leads to lower CPU frequency
986 [21259] libc: [alpha] termios.h missing IXANY for POSIX
987 [21261] libc: [sparc64] bits/setjmp.h namespace
988 [21267] network: [mips] bits/socket.h IOC* namespace
989 [21268] libc: [alpha] termios.h NL2, NL3 namespace
990 [21270] libc: mmap64 silently truncates large offset values
991 [21275] libc: posix_spawn always crashes on ia64 now
992 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
993 [21280] math: [powerpc] logbl for POWER7 return incorrect results
994 [21289] libc: Incorrect declaration for 32-bit platforms with
995 _FILE_OFFSET_BITS=64 causes build error
996 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
997 not support gethostbyname4_r
998 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1000 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1002 [21340] libc: Support POSIX_SPAWN_SETSID
1003 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1004 [21359] network: ns_name_pack needs additional byte in destination buffer
1005 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1006 against fragmentation attacks (CVE-2017-12132)
1007 [21369] network: resolv: Remove EDNS fallback
1008 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1010 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1011 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1012 [21393] stdio: Missing dup3 error check in freopen, freopen64
1013 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1014 [21399] localedata: Bad description for U00EC in
1015 localedata/charmaps/CP1254
1016 [21411] malloc: realloc documentation error
1017 [21426] network: sys/socket.h uio.h namespace
1018 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1019 [21445] libc: signal.h bsd_signal namespace
1020 [21455] network: Network headers stdint.h namespace
1021 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1023 [21475] network: resolv: Overlong search path is truncated mid-label
1024 [21511] libc: sigstack namespace
1025 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1026 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1027 bits/syscall.h: No such file or directory
1028 [21517] libc: struct sigaltstack namespace
1029 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1030 [21533] localedata: Update locale data to Unicode 10.0
1032 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1033 junk at end of line, first unrecognized character is `@'
1034 [21538] libc: SIG_HOLD missing for XPG4
1035 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1036 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1037 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1038 [21543] libc: sigevent namespace
1039 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1040 size for general purpose registers in mcontext_t structure
1041 [21550] libc: sigwait namespace
1042 [21552] libc: XPG4 bsd_signal namespace
1043 [21554] libc: sigpause namespace
1044 [21560] libc: sys/wait.h signal.h namespace
1045 [21561] libc: waitid namespace
1046 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1047 '/usr/include/stdlib.h': Permission denied
1048 [21575] libc: sys/wait.h missing struct rusage definition
1049 [21584] libc: sigaltstack etc namespace
1050 [21597] libc: siginterrupt namespace
1051 [21607] math: hppa: FAIL: math/test-tgmath
1052 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1054 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1055 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1056 stack and heap (CVE-2017-1000366)
1057 [21625] libc: wait3 namespace
1058 [21654] nss: Incorrect pointer alignment in NSS group merge result
1060 [21657] network: Parse interface zone id for node-local multicast
1061 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1063 [21666] libc: .symver is used on common symbol
1064 [21668] network: resolv: res_init cross-thread broadcast introduces race
1066 [21687] math: tgmath.h totalorder, totalordermag return type
1067 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1069 [21696] libc: Incorrect assumption of of __cpu_mask in
1070 posix/sched_cpucount.c
1071 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1072 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1074 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1075 leading to relocation crash
1076 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1077 `resolv_conf_matches (resp, conf)' failed.
1078 [21710] localedata: Added Samoan language locale for Samoa
1079 [21711] localedata: Pashto yesstr/nostr locale are missing
1080 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1081 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1082 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1083 [21723] localedata: yesstr/nostr missing for Chinese language locale
1084 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1086 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1088 [21728] localedata: New Locale for Tongan language
1089 [21729] localedata: incorrect LC_NAME fields for hi_IN
1090 [21733] localedata: yesstr and nostr are missing for zh_HK
1091 [21734] localedata: Missing yesstr and nostr are for kw_GB
1092 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1093 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1094 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1095 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1097 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1099 [21749] localedata: Wrong abbreviated day name (“abday”) for
1101 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1102 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1103 [21759] localedata: missing yesstr and nostr for Tigrinya
1104 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1105 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1106 [21767] localedata: Missing Bislama locales
1107 [21768] localedata: Missing yesstr and nostr for aa_ET
1108 [21770] localedata: Missing Field in li_NL
1109 [21778] nptl: Robust mutex may deadlock
1110 [21779] libc: MicroBlaze segfaults when loading libpthread
1111 [21783] localedata: Fix int_select international_call_prefixes
1112 [21784] localedata: Inconsistency in country_isbn
1113 [21788] localedata: Missing Country Postal Abbreviations
1114 [21794] localedata: Added-country_isbn-for-Italy
1115 [21795] localedata: Add/Fix country_isbn for France
1116 [21796] localedata: Added country_isbn for Republic of Korea
1117 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1118 [21799] localedata: Added int_select international_call_prefixes
1119 [21801] localedata: Added int_select international_call_prefixes
1120 [21804] nptl: Double semicolon in thread-shared-types.h
1121 [21807] localedata: LC_ADDRESS fix for pap_CW
1122 [21808] localedata: Fix LC_ADDRESS for pap_AW
1123 [21821] localedata: Added country_name in mai_IN
1124 [21822] localedata: Fix LC_TIME for mai_IN
1125 [21823] localedata: missing yesstr, nostr for sa_IN
1126 [21825] localedata: Fix name_mrs for mag_IN
1127 [21828] localedata: 2.26 changelog should mention user visible changes
1129 [21835] localedata: Added Maithili language locale for Nepal
1130 [21838] localedata: Removed redundant data for the_NP
1131 [21839] localedata: Fix LC_MONETARY for ta_LK
1132 [21844] localedata: Fix Latin characters and Months Sequence.
1133 [21848] localedata: Fix mai_NP Title Name
1138 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1139 24731-2:2010, is supported to enable declarations of functions from that
1140 TR. Note that not all functions from that TR are supported by the GNU C
1143 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1144 18661-1:2014, is supported to enable declarations of functions and macros
1145 from that TS. Note that not all features from that TS are supported by
1148 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1149 18661-4:2015, is supported to enable declarations of functions and macros
1150 from that TS. Note that most features from that TS are not supported by
1153 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1154 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1155 Since the GNU C Library defaults to a much newer revision of POSIX, this
1156 will only affect programs that specifically request an old conformance
1157 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1158 see a change in the visible declarations, but a program compiled with
1159 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1162 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1163 defined by all multithreaded code, but glibc has not required this for
1166 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1167 means that in a future release, the macros “major”, “minor”, and “makedev”
1168 will only be available from <sys/sysmacros.h>.
1170 These macros are not part of POSIX nor XSI, and their names frequently
1171 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1172 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1173 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1176 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1177 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1178 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1180 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1181 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1182 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1183 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1184 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1185 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1186 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1187 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1188 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1189 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1190 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1193 * New <math.h> features are added from TS 18661-1:2014:
1195 - Signaling NaN macros: SNANF, SNAN, SNANL.
1197 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1198 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1199 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1201 - llogb functions: the llogb, llogbf and llogbl functions, and the
1202 FP_LLOGB0 and FP_LLOGBNAN macros.
1204 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1207 - Comparison macros: iseqsig.
1209 - Classification macros: iscanonical, issubnormal, iszero.
1211 - Total order functions: totalorder, totalorderf, totalorderl,
1212 totalordermag, totalordermagf, totalordermagl.
1214 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1216 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1217 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1219 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1220 are added to libc. They convert a floating-point number into string.
1222 * Most of glibc can now be built with the stack smashing protector enabled.
1223 It is recommended to build glibc with --enable-stack-protector=strong.
1224 Implemented by Nick Alcock (Oracle).
1226 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1227 intended to be used instead of memset() to erase sensitive data after use;
1228 the compiler will not optimize out calls to explicit_bzero even if they
1229 are "unnecessary" (in the sense that no _correct_ program can observe the
1230 effects of the memory clear).
1232 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1233 to float instead of double. This does not affect the ABI of any libraries
1234 that are part of the GNU C Library, but may affect the ABI of other
1235 libraries that use this type in their interfaces.
1237 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1238 float_t and double_t types are now defined to long double instead of float
1239 and double. These options are not the default, and this does not affect
1240 the ABI of any libraries that are part of the GNU C Library, but it may
1241 affect the ABI of other libraries that use this type in their interfaces,
1242 if they are compiled or used with those options.
1244 * The getentropy and getrandom functions, and the <sys/random.h> header file
1247 * The buffer size for byte-oriented stdio streams is now limited to 8192
1248 bytes by default. Previously, on Linux, the default buffer size on most
1249 file systems was 4096 bytes (and thus remains unchanged), except on
1250 network file systems, where the buffer size was unpredictable and could be
1251 as large as several megabytes.
1253 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1254 for the Linux quota interface which predates kernel version 2.4.22 has
1257 * The malloc_get_state and malloc_set_state functions have been removed.
1258 Already-existing binaries that dynamically link to these functions will
1259 get a hidden implementation in which malloc_get_state is a stub. As far
1260 as we know, these functions are used only by GNU Emacs and this change
1261 will not adversely affect already-built Emacs executables. Any undumped
1262 Emacs executables, which normally exist only during an Emacs build, should
1263 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1265 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1266 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1267 “no-ip6-dotint” had already been the default, and support for the
1268 “ip6-dotint” option was removed from the Internet in 2006.
1270 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1271 flag from <resolv.h> have been removed. The option relied on a
1272 backwards-incompatible DNS extension which was never deployed on the
1275 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1276 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1277 They were already unimplemented.
1279 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1280 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1281 removed again from the IETF name lookup interface specification in RFC
1282 2553. Applications should use getaddrinfo instead.
1284 * DNSSEC-related declarations and definitions have been removed from the
1285 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1286 decode the data part of DNSSEC record types. Previous versions of glibc
1287 only implemented minimal support for the previous version of DNSSEC, which
1288 is incompatible with the currently deployed version.
1290 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1291 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1292 <arpa/nameser.h> header file because the distinction between RR types and
1293 meta-RR types is not officially standardized, subject to revision, and
1294 thus not suitable for encoding in a macro.
1296 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1297 and rhook members of the res_state type in <resolv.h> have been removed.
1298 The glibc stub resolver did not support these hooks, but the header file
1299 did not reflect that.
1301 * For multi-arch support it is recommended to use a GCC which has
1302 been built with support for GNU indirect functions. This ensures
1303 that correct debugging information is generated for functions
1304 selected by IFUNC resolvers. This support can either be enabled by
1305 configuring GCC with '--enable-gnu-indirect-function', or by
1306 enabling it by default by setting 'default_gnu_indirect_function'
1307 variable for a particular architecture in the GCC source file
1310 * GDB pretty printers have been added for mutex and condition variable
1311 structures in POSIX Threads. When installed and loaded in gdb these pretty
1312 printers show various pthread variables in human-readable form when read
1313 using the 'print' or 'display' commands in gdb.
1315 * Tunables feature added to allow tweaking of the runtime for an application
1316 program. This feature can be enabled with the '--enable-tunables' configure
1317 flag. The GNU C Library manual has details on usage and README.tunables has
1318 instructions on adding new tunables to the library.
1320 * A new version of condition variables functions have been implemented in
1321 the NPTL implementation of POSIX Threads to provide stronger ordering
1324 * A new version of pthread_rwlock functions have been implemented to use a more
1325 scalable algorithm primarily through not using a critical section anymore to
1328 Security related changes:
1330 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1331 have been created with makecontext could fail to terminate due to a
1332 missing .cantunwind annotation. This has been observed to lead to a hang
1333 (denial of service) in some Go applications compiled with gccgo. Reported
1334 by Andreas Schwab. (CVE-2016-6323)
1336 * The DNS stub resolver functions would crash due to a NULL pointer
1337 dereference when processing a query with a valid DNS question type which
1338 was used internally in the implementation. The stub resolver now uses a
1339 question type which is outside the range of valid question type values.
1342 The following bugs are resolved with this release:
1344 [4099] stdio: Overly agressive caching by stream i/o functions.
1345 [7065] build: Support building glibc with -fstack-protector or -fstack-
1347 [9842] localedata: en_CA: incorrect date format
1348 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1349 before it started waiting
1350 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1351 [15765] nptl: sem_open is wrongly a cancellation point
1352 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1353 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1355 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1356 library linked with pthread
1357 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1358 "FIXME: Ingo" issue)
1359 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1360 [17252] libc: getrandom and getentropy syscall
1361 [17730] malloc: thread-local storage is sometimes improperly free()'d
1362 after being __libc_memalign()'d
1363 [18241] stdio: failed fseek on memstream does not set errno and can fail
1365 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
1367 [18463] nptl: pthread_cond_broadcast issue when surrounded by
1368 PTHREAD_PRIO_INHERIT mutex on ARM
1369 [18784] network: res_query and related function crash for special record
1370 type queries (CVE-2015-5180)
1371 [19380] math: strtod does not raise "inexact"
1372 [19387] string: Integer overflow in memchr
1373 [19390] string: Integer overflow in strncat
1374 [19398] build: linknamespace tests fail with massively parallel build
1375 [19402] nptl: Deadlock with robust shared mutex and asynchronous
1377 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
1378 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
1379 [19514] libc: [PATCH] Fix spelling errors in spelling
1380 "implement"/"implementation" in several places
1381 [19582] network: Deprecate RES_USE_INET6
1382 [19673] manual: clog10 docs appear to be erroneous
1383 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
1384 causes a segmentation fault
1385 [19826] libc: invalid pointer returned from __tls_get_addr with static
1387 [20016] network: resolv: Remove hooks support from the API
1388 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
1390 [20033] math: [x86_64] vectorized math function don't call the __finite
1392 [20116] nptl: use after free in pthread_create
1393 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
1394 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
1396 [20311] nptl: please install proc_service.h
1397 [20366] libc: Compilation errors in installed headers in strict-compliance
1399 [20370] malloc: malloc: Arena free list management is still racy
1400 (incorrect fix in bug 19243)
1401 [20386] libc: assert (X = 0) does not result in GCC warning
1402 [20432] malloc: malloc: Minimize interface required for interposition
1403 [20435] libc: Missing unwind info in __startcontext causes infinite loop
1404 in _Unwind_Backtrace (CVE-2016-6323)
1405 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
1406 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
1408 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
1409 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
1410 [20477] network: resolv: incorrect double-checked locking related to
1412 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
1414 [20495] math: x86_64 performance degradation due to AVX/SSE transition
1416 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
1417 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
1418 cause transition penalty
1419 [20517] math: sparcv9 missing fdiml compat symbol
1420 [20524] manual: strverscmp is inconsistent
1421 [20525] libc: <sys/quota.h> should be based on kernel headers
1422 [20539] math: GCC 7 -static -lm fails to link at -O3
1423 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
1425 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
1427 [20591] network: Remove obsolete DNSSEC support
1428 [20592] network: DNS resource record type classification macros in
1429 <arpa/nameser.h> are incorrect
1430 [20593] network: Update DNS RR type definitions
1431 [20611] network: getaddrinfo accepts invalid numeric scope IDs
1432 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
1434 [20629] network: libresolv: Remove support for bitstring labels
1436 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
1437 assertion: "maxidx >= 2"
1438 [20660] math: [arm] Use VSQRT
1439 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
1440 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
1441 [20689] libc: Test for FMA should also check for AVX.
1442 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
1443 [20715] math: iszero macro breaks existing code
1444 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
1445 [20728] libc: powerpc: Missing TOC stub in clone
1446 [20729] build: glibc-2.24 fails to build for i486 with -Os
1447 [20750] build: Build fails with default PIE enabled gcc-6.x
1448 [20768] math: [alpha] sqrt fegetenv namespace
1449 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
1451 [20787] math: float_t is defined as float incorrectly on x86_64 even if
1452 __FLT_EVAL_METHOD__ is 2
1453 [20790] network: rpcgen buffer overrun in get_prog_declaration
1454 [20822] nptl: race condition in __lll_unlock_elision on powerpc
1455 [20829] libc: crypt snprintf namespace
1456 [20847] libc: tst-vfork3 failure
1457 [20855] math: Default bits/mathdef.h has inappropriate float_t
1458 [20859] math: [sh4] FP_ILOGB0 invalid
1459 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
1460 U+20AC), not same as GBK
1461 [20915] dynamic-link: global-dynamic TLS broken on aarch64
1462 [20916] math: pow handling of sNaN arguments
1463 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
1464 [20919] math: Bad pow (qNaN, 0) result with -lieee
1465 [20940] math: hypot sNaN handling
1466 [20947] math: fmax, fmin sNaN handling
1467 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
1468 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
1470 [20971] string: powerpc64/power7 memchr overflows internal pointer check
1471 [20973] nptl: robust mutexes: Lost wake-ups
1472 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
1473 [20978] nis: strlen on null pointer in nss_nisplus
1474 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
1476 [21014] string: i686 memchr overflows internal pointer check
1477 [21019] libc: [mips] n32 lseek incorrect on overflow
1478 [21022] libc: [microblaze] __backtrace get_frame_size namespace
1479 [21026] libc: [MIPS] readahead syscall is broken on n64
1480 [21028] math: Fallback fesetexceptflag should always succeed
1481 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
1482 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
1484 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
1485 [21061] librt: [microblaze] librt lost clock_* exports
1486 [21073] libc: tunables: insecure environment variables passed to
1487 subprocesses with AT_SECURE
1488 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
1492 * The minimum Linux kernel version that this version of the GNU C Library
1493 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
1494 kernel version 2.6.32 or later suffices (on architectures that already
1495 required kernel versions more recent than 3.2, those requirements remain
1496 unchanged). Linux 3.2 or later kernel headers are required on all
1499 * The pap_AN locale has been deleted. This has been deprecated for a long
1500 time. It has been replaced by pap_AW & pap_CW, both of which have long
1501 been included in previous releases.
1503 * The readdir_r and readdir64_r functions have been deprecated. It is
1504 recommended to use readdir and readdir64 instead.
1506 * The type “union wait” has been removed. It was deprecated in the early
1507 1990s and never part of POSIX. Application code should use the int type
1508 instead of “union wait”.
1510 * A new NSS action is added to facilitate large distributed system
1511 administration. The action, MERGE, allows remote user stores like LDAP
1512 to be merged into local user stores like /etc/groups in order to provide
1513 easy to use, updated, and managed sets of merged credentials. The new
1514 action can be used by configuring it in /etc/nsswitch.conf:
1515 group: files [SUCCESS=merge] nis
1516 Implemented by Stephen Gallagher (Red Hat).
1518 * The deprecated __malloc_initialize_hook variable has been removed from the
1521 * The long unused localedef --old-style option has been removed. It hasn't
1522 done anything in over 16 years. Scripts using this option can safely
1525 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
1526 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
1527 return the next representable value in the direction of positive infinity
1528 and the nextdown functions return the next representable value in the
1529 direction of negative infinity. These are currently enabled as GNU
1532 Security related changes:
1534 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
1535 could result in a stack overflow when getnetbyname was called with an
1536 overly long name. (CVE-2016-3075)
1538 * Previously, getaddrinfo copied large amounts of address data to the stack,
1539 even after the fix for CVE-2013-4458 has been applied, potentially
1540 resulting in a stack overflow. getaddrinfo now uses a heap allocation
1541 instead. Reported by Michael Petlan. (CVE-2016-3706)
1543 * The glob function suffered from a stack-based buffer overflow when it was
1544 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
1545 Reported by Alexander Cherepanov. (CVE-2016-1234)
1547 * The Sun RPC UDP client could exhaust all available stack space when
1548 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
1549 alloca plugin for GCC. (CVE-2016-4429)
1551 * The IPv6 name server management code in libresolv could result in a memory
1552 leak for each thread which is created, performs a failing naming lookup,
1553 and exits. Over time, this could result in a denial of service due to
1554 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
1556 The following bugs are resolved with this release:
1558 [1170] localedata: ne_NP: update Nepali locale definition file
1559 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
1561 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
1562 [6796] math: fdim() does not set errno on overflow
1563 [10354] libc: posix_spawn should use vfork() in more cases than presently
1564 [11213] localedata: localedata: add copyright disclaimer to locale files
1565 [12143] localedata: chr_US: new Cherokee locale
1566 [12450] localedata: sgs_LT: new locale
1567 [12676] localedata: ln_CD: new locale
1568 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
1570 [13304] math: fma, fmaf, fmal produce wrong results
1571 [14259] build: --localedir arg to configure is ignored
1572 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
1573 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
1574 [14934] localedata: es_CL: wrong first weekday chilean locale
1575 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
1577 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
1579 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
1580 [15368] nptl: raise() is not async-signal-safe
1581 [15479] math: ceil, floor, round and trunc raise inexact exception
1582 [15578] localedata: kk_KZ: various updates
1583 [16003] localedata: pap_AN: punt old locale
1584 [16137] localedata: iw_IL: punt old locale
1585 [16190] localedata: eo: new esperanto locale
1586 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
1587 [16742] malloc: race condition: pthread_atfork() called before first
1588 malloc() results in unexpected locking behaviour/deadlocks
1589 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
1591 [16983] localedata: postal_fmt does not allow %l and %n modifiers
1592 [17565] localedata: pt_PT: wrong (work-)week start
1593 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
1594 [17950] build: Build fails with -msse
1595 [18205] localedata: be_BY*: wrong first_weekday and first_workday
1596 [18433] libc: posix_spawn does not return correctly upon failure to
1598 [18453] localedata: charmaps/IBM875: incorrect codes
1599 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
1601 [18896] localedata: he_IL: improvements for currency
1602 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
1603 Romanian locale data
1604 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
1606 [19056] libc: Deprecate readdir_r
1607 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
1609 [19198] localedata: nl_NL: small improvements for Dutch locales
1610 [19257] network: Per-thread memory leak in __res_vinit with IPv6
1611 nameservers (CVE-2016-5417)
1612 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
1614 [19400] locale: Language missing in "iso-639.def", trivial fix in
1616 [19431] malloc: Deadlock between fflush, getdelim, and fork
1617 [19505] libc: Incorrect file descriptor validity checks in
1618 posix_spawn_file_actions_add{open,close,dup2}
1619 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
1620 when using RTLD_NEXT
1621 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
1622 `intl/{gettextP,loadinfo}.h'
1623 [19534] libc: execle, execlp may use malloc
1624 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
1625 [19573] network: res_nclose and __res_maybe_init disagree about name
1626 server initialization, breaking Hesiod
1627 [19575] localedata: Status of GB18030 tables
1628 [19581] localedata: sr_* date_fmt string contains additional newline
1629 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
1631 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
1632 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
1633 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
1634 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
1636 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
1638 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
1640 [19610] dynamic-link: ldconfig -X removes stale symbolic links
1641 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
1642 [19633] locale: strfmon_l applies global locale to number formatting
1643 [19642] network: Memory leak in getnameinfo
1644 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
1645 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
1647 [19654] math: [x86_64] Need testcase for BZ #19590 fix
1648 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
1650 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
1651 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
1653 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
1655 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
1657 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
1658 pointers and lengths in error-case.
1659 [19727] locale: Converting from/to UTF-xx with iconv() does not always
1660 report errors on UTF-16 surrogates values.
1661 [19755] nscd: nscd assertion failure in gc
1662 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
1663 [19759] libc: mempcpy shouldn't be inlined
1664 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
1665 [19765] libc: s390 needs an optimized mempcpy
1666 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1667 NAME_MAX limit assumption (CVE-2016-1234)
1668 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1669 [19787] network: Missing and incorrect truncation checks in getnameinfo
1670 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1672 [19791] network: Assertion failure in res_query.c with un-connectable name
1674 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1675 [19822] math: libm.so install clobbers old version
1676 [19825] network: resolv: send_vc can return uninitialized data in second
1677 response to getaddrinfo
1678 [19830] network: nss_dns: should check RDATA length against buffer length
1679 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1680 confronted with A/AAAA records of invalid size
1681 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1682 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1683 [19853] stdio: Printing IBM long double in decimal with high precision is
1685 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1686 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1687 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1689 [19865] network: Assertion failure or memory leak in
1690 _nss_dns_getcanonname_r
1691 [19868] network: nss_dns: netent code does not skip over non-PTR records
1692 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1694 [19881] string: Improve x86-64 memset
1695 [19907] string: Incorrect memcpy tests
1696 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1698 [19925] libc: termios.h XCASE namespace
1699 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1700 [19929] libc: limits.h NL_NMAX namespace
1701 [19931] stdio: Memory leak in vfprintf
1702 [19957] libc: clone(CLONE_VM) access invalid parent memory
1703 [19963] localedata: en_IL: New locale
1704 [19989] stdio: stdio.h cuserid namespace
1705 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1707 [19996] locale: langinfo.h nl_langinfo_l namespace
1708 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1709 [20010] network: getaddrinfo: Stack overflow in hostent translation
1711 [20012] stdio: libio: fmemopen append mode failure
1712 [20014] stdio: stdio.h namespace for pre-threads POSIX
1713 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1714 [20023] libc: fcntl.h timespec namespace
1715 [20024] math: [x86_64] vectorized sincos trashes the stack
1716 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1717 [20041] time: sys/time.h timespec namespace
1718 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1719 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1720 [20051] libc: ttyslot in wrong header under wrong conditions
1721 [20054] libc: gethostname not declared for XPG4
1722 [20055] libc: termios.h missing tcgetsid for XPG4
1723 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1725 [20073] libc: sys/stat.h fchmod namespace
1726 [20074] libc: stdlib.h rand_r namespace
1727 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1728 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1730 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1731 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1733 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1734 [20119] libc: Wrong mask for processors level type from CPUID
1735 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1736 AS not supporting AVX512
1737 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1739 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1740 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1742 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1743 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1744 [20178] libc: posix_spawn{p} should not call exit
1745 [20191] stdio: libio: vtables hardening
1746 [20195] string: FMA4 detection requires CPUID execution with register
1748 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1749 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1751 [20212] math: acos (sNaN) returns sNaN
1752 [20213] math: asin (sNaN) returns sNaN
1753 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1754 [20218] math: [i386] asinhl (sNaN) returns sNaN
1755 [20219] math: [i386] atanhl (sNaN) returns sNaN
1756 [20222] stdio: fopencookie: Mangle function pointers
1757 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1758 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1759 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1761 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1762 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1763 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1764 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1765 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1766 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1767 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1768 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1769 [20240] math: modf (sNaN) returns sNaN
1770 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1771 [20250] math: frexp (sNaN) returns sNaN
1772 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1773 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1775 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1776 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1777 subscript is below array bounds [-Werror=array-bounds]
1778 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1779 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1781 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1782 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1784 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1785 "invalid" exceptions
1786 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1787 [20316] localedata: id_ID: Februari instead of Pebruari
1788 [20327] string: POWER8 strcasecmp returns incorrect result
1789 [20347] math: Failure: Test: j0_downward (0xap+0)
1790 [20348] libc: FAIL: misc/tst-preadvwritev64
1791 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1792 [20350] libc: There is no test for p{read,write}64
1793 [20357] math: Incorrect cos result for 1.5174239687223976
1794 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1798 * Unicode 8.0.0 Support: Character encoding, character type info, and
1799 transliteration tables are all updated to Unicode 8.0.0, using new
1800 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1801 These updates cause user visible changes, such as the fixes for bugs
1802 89, 16061, and 18568.
1804 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1805 kernel-internal CPU set size. This means that requests that change the
1806 CPU affinity which failed before (for example, an all-ones CPU mask) will
1807 now succeed. Applications that need to determine the effective CPU
1808 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1809 setting it because the kernel can adjust it (and the previous size check
1810 would not detect this in the majority of cases).
1812 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1813 the following new symbols are used: fts64_children, fts64_close,
1814 fts64_open, fts64_read and fts64_set.
1816 * getaddrinfo now detects certain invalid responses on an internal netlink
1817 socket. If such responses are received, an affected process will
1818 terminate with an error message of "Unexpected error <number> on netlink
1819 descriptor <number>" or "Unexpected netlink response of size <number> on
1820 descriptor <number>". The most likely cause for these errors is a
1821 multi-threaded application which erroneously closes and reuses the netlink
1822 file descriptor while it is used by getaddrinfo.
1824 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1825 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1826 unnecessary serialization of memory allocation requests across threads.
1827 The defect is now corrected. Users should see a substantial increase in
1828 the concurent throughput of allocation requests for applications which
1829 trigger this bug. Affected applications typically create and
1830 destroy threads frequently. (Bug 19048 was reported and analyzed by
1833 * There is now a --disable-timezone-tools configure option for disabling the
1834 building and installing of the timezone related utilities (zic, zdump, and
1835 tzselect). This is useful for people who build the timezone data and code
1836 independent of the GNU C Library.
1838 * The obsolete header <regexp.h> has been removed. Programs that require
1839 this header must be updated to use <regex.h> instead.
1841 * The obsolete functions bdflush, create_module, get_kernel_syms,
1842 query_module and uselib are no longer available to newly linked binaries;
1843 the header <sys/kdaemon.h> has been removed. These functions and header
1844 were specific to systems using the Linux kernel and could not usefully be
1845 used with the GNU C Library on systems with version 2.6 or later of the
1848 * Optimized string, wcsmbs and memory functions for IBM z13.
1849 Implemented by Stefan Liebler.
1851 * Newly linked programs that define a variable called signgam will no longer
1852 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1853 require signgam to be set by those functions must ensure that they use the
1854 variable provided by the GNU C Library and declared in <math.h>, without
1855 defining their own copy.
1857 * The minimum GCC version that can be used to build this version of the GNU
1858 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1859 still be used to compile programs using the GNU C Library.
1861 Security related changes:
1863 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1864 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1866 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1867 the pointer guard feature. It is always enabled. Previously,
1868 LD_POINTER_GUARD could be used to disable security hardening in binaries
1869 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1872 * An integer overflow in hcreate and hcreate_r could lead to an
1873 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1875 * The catopen function no longer has unbounded stack usage. Reported by
1876 Max. (CVE-2015-8779)
1878 * The nan, nanf and nanl functions no longer have unbounded stack usage
1879 depending on the length of the string passed as an argument to the
1880 functions. Reported by Joseph Myers. (CVE-2014-9761)
1882 * A stack-based buffer overflow was found in libresolv when invoked from
1883 libnss_dns, allowing specially crafted DNS responses to seize control
1884 of execution flow in the DNS client. The buffer overflow occurs in
1885 the functions send_dg (send datagram) and send_vc (send TCP) for the
1886 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1887 family. The use of AF_UNSPEC triggers the low-level resolver code to
1888 send out two parallel queries for A and AAAA. A mismanagement of the
1889 buffers used for those queries could result in the response of a query
1890 writing beyond the alloca allocated buffer created by
1891 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
1892 the overflow. Thanks to the Google Security Team and Red Hat for
1893 reporting the security impact of this issue, and Robert Holiday of
1894 Ciena for reporting the related bug 18665. (CVE-2015-7547)
1896 The following bugs are resolved with this release:
1898 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
1899 [887] math: Math library function "logb" and "nextafter" inconsistent
1900 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
1901 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
1902 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
1903 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
1905 [4404] localedata: German translation of "Alarm clock" is misleading
1906 [6799] math: nextafter() and nexttoward() doen't set errno on
1907 overflow/underflow errors
1908 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
1910 [10432] nis: _nss_nis_setnetgrent assertion failure
1911 [11460] libc: fts has no LFS support
1912 [12926] network: getaddrinfo()/make_request() may spin forever
1913 [13065] nptl: Race condition in pthread barriers
1914 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
1915 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
1917 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
1918 [14912] libc: Rename non-installed bits/*.h headers
1919 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
1920 [15367] math: Let gcc use __builtin_isinf
1921 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
1922 [15421] math: lgamma wrongly sets signgam for ISO C
1923 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
1924 FE_INVALID with argument out of range
1925 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
1927 [15786] dynamic-link: ifunc resolver functions can smash function
1929 [15918] math: Unnecessary check for equality in hypotf()
1930 [16061] localedata: Review / update transliteration data
1931 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
1933 [16141] time: strptime %z offset restriction
1934 [16171] math: drem should be alias of remainder
1935 [16296] math: fegetround is pure?
1936 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
1937 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
1939 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
1940 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
1942 [16422] math: [powerpc] math-float, math-double failing llrint tests with
1943 "Exception "Inexact" set" on ppc32
1944 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
1945 [16517] math: Missing underflow exception from tanf/tan/tanl
1946 [16519] math: Missing underflow exception from sinhf
1947 [16520] math: Missing underflow exception from tanhf
1948 [16521] math: Missing underflow exception from exp2
1949 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
1951 [16734] stdio: fopen calls mmap to allocate its buffer
1952 [16961] math: nan function incorrect handling of bad sequences
1953 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
1954 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
1955 [16985] locale: localedef: confusing error message when opening output
1957 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
1958 [17197] locale: Redundant shift character in iconv conversion output at
1960 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
1961 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
1962 [17250] dynamic-link: static linking breaks nss loading
1963 (getaddrinfo/getpwnam/etc...)
1964 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
1966 [17441] math: isnan() should use __builtin_isnan() in GCC
1967 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
1968 (related to lock elision)
1969 [17787] manual: Exponent on page 324 of the PDF ends prematurely
1970 [17886] time: strptime should be able to parse "Z" as a timezone with %z
1971 [17887] time: strptime should be able to parse "+01:00" style timezones
1972 [17905] libc: catopen() Multiple unbounded stack allocations
1974 [18084] libc: backtrace (..., 0) dumps core on x86
1975 [18086] libc: nice() sets errno to 0 on success
1976 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
1977 is too large (CVE-2015-8778)
1978 [18251] dynamic-link: SONAME missing when audit modules provides path
1979 [18265] libc: add attributes for wchar string and memory functions
1980 [18370] math: csqrt missing underflows
1981 [18421] libc: [hppa] read-only segment has dynamic relocations
1982 [18472] libc: Obsolete syscall wrappers should be compat symbols
1983 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
1984 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
1985 [18525] localedata: Remove locale timezone information
1986 [18560] libc: [powerpc] spurious bits/ipc.h definitions
1987 [18568] localedata: Update locale data to Unicode 8.0
1988 [18589] locale: sort-test.sh fails at random
1989 [18595] math: ctan, ctanh missing underflows
1990 [18604] libc: assert macro-expands its argument
1991 [18610] math: S390: fetestexcept() reports any exception if DXC-code
1992 contains a vector instruction exception.
1993 [18611] math: j1, jn missing errno setting on underflow
1994 [18618] localedata: sync Chechen locale definitions with other *_RU
1996 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
1997 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
1998 [18665] network: In send_dg, the recvfrom function is NOT always using the
1999 buffer size of a newly created buffer (CVE-2015-7547)
2000 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2002 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2004 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2005 [18699] math: tilegx cproj() for various complex infinities does not yield
2007 [18724] libc: Harden put*ent functions against data injection
2008 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2009 [18755] build: build errors with -DNDEBUG
2010 [18757] stdio: fmemopen fails to set errno on failure
2011 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2013 [18781] libc: openat64 lacks O_LARGEFILE
2014 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2015 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2016 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2017 [18790] math: [ldbl-128ibm] tanhl inaccurate
2018 [18795] libc: stpncpy fortification misses buffer lengths that are
2019 statically too large
2020 [18796] build: build fails for --disable-mathvec
2021 [18803] math: hypot missing underflows
2022 [18820] stdio: fmemopen may leak memory on failure
2023 [18823] math: csqrt spurious underflows
2024 [18824] math: fma spurious underflows
2025 [18825] math: pow missing underflows
2026 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2027 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2028 [18870] build: sem_open.c fails to compile with missing symbol
2030 [18872] stdio: Fix memory leak in printf_positional
2031 [18873] libc: posix_fallocate overflow check ineffective
2032 [18875] math: Excess precision leads incorrect libm
2033 [18877] libc: arm: mmap offset regression
2034 [18887] libc: memory corruption when using getmntent on blank lines
2035 [18918] localedata: hu_HU: change time to HH:MM:SS format
2036 [18921] libc: Regression: extraneous stat() and fstat() performed by
2038 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2039 binaries (CVE-2015-8777)
2040 [18951] math: tgamma missing underflows
2041 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2043 [18953] localedata: lt_LT: change currency symbol to the euro
2044 [18956] math: powf inaccuracy
2045 [18961] math: [i386] exp missing underflows
2046 [18966] math: [i386] exp10 missing underflows
2047 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2048 [18969] build: multiple string test failures due to missing locale
2050 [18970] libc: Reference of pthread_setcancelstate in libc.a
2051 [18977] math: float / long double Bessel functions not in XSI POSIX
2052 [18980] math: i386 libm functions return with excess range and precision
2053 [18981] math: i386 scalb*, ldexp return with excess range and precision
2054 [18982] stdio: va_list and vprintf
2055 [18985] time: Passing out of range data to strftime() causes a segfault
2057 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2058 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2059 [19012] locale: iconv_open leaks memory on error path
2060 [19016] math: clog, clog10 inaccuracy
2061 [19018] nptl: Mangle function pointers in tls_dtor_list
2062 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2063 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2064 [19048] malloc: malloc: arena free list can become cyclic, increasing
2066 [19049] math: [powerpc] erfc incorrect zero sign
2067 [19050] math: [powerpc] log* incorrect zero sign
2068 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2069 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2070 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2071 [19074] network: Data race in _res_hconf_reorder_addrs
2072 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2073 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2074 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2076 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2078 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2079 [19086] manual: posix_fallocate64 documented argument order is wrong.
2080 [19088] math: lround, llround missing exceptions close to overflow
2082 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2083 [19095] math: dbl-64 lrint incorrect for 64-bit long
2084 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2085 [19124] dynamic-link: ld.so failed to build with older assmebler
2086 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2087 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2088 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2089 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2090 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2091 pthread_setaffinity_np
2092 [19156] math: [ldbl-128] j0l spurious underflows
2093 [19164] nptl: tst-getcpu fails with many possible CPUs
2094 [19168] math: math/test-ildoubl and math/test-ldouble failure
2095 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2096 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2098 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2099 (FE_NOMASK_ENV) do not clear SSE exceptions
2100 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2101 _int_new_arena/reused_arena
2102 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2103 [19201] math: dbl-64 remainder incorrect sign of zero result
2104 [19205] math: bits/math-finite.h conditions do not match math.h and
2106 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2107 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2108 for C99-based standards
2109 [19212] libc: features.h not -Wundef clean
2110 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2112 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2113 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2114 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2116 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2117 "inexact" exceptions
2118 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2120 [19242] libc: strtol incorrect in Turkish locales
2121 [19243] malloc: reused_arena can pick an arena on the free list, leading
2122 to an assertion failure and reference count corruption
2123 [19253] time: tzset() ineffective when temporary TZ did not include DST
2125 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2126 [19270] math: [hppa] Shared libm missing __isnanl
2127 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2128 MAP_HUGETLB and MAP_STACK defines
2129 [19313] nptl: Wrong __cpu_mask for x32
2130 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2131 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2132 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2133 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2134 [19363] time: x32: times() return value wrongly truncates/sign extends
2136 [19367] dynamic-link: Improve branch prediction on Silvermont
2137 [19369] network: Default domain name not reset by res_ninit when "search"
2138 / "domain" entry is removed from resolv.conf
2139 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2141 [19385] localedata: bg_BG: time separator should be colon, not comma
2142 [19408] libc: linux personality syscall wrapper may erroneously return an
2143 error on 32-bit architectures
2144 [19415] libc: dladdr returns wrong names on hppa
2145 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2146 IBM905, IBM907, and IBM909
2147 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2148 [19443] build: build failures with -DDEBUG
2149 [19451] build: Make check fails on test-double-vlen2
2150 [19462] libc: Glibc failed to build with -Os
2151 [19465] math: Wrong code with -Os
2152 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2154 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2156 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2157 [19486] math: S390: Math tests fail with "Exception Inexact set".
2158 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2159 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2161 [19590] math: Fail to build shared objects that use libmvec.so functions.
2165 * The following bugs are resolved with this release:
2167 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2168 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2169 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2170 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2171 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2172 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2173 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2174 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2175 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2176 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2177 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2178 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2179 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2180 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2181 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2182 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2183 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2184 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2185 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2186 18657, 18676, 18694, 18696, 18887.
2188 * Cache information can be queried via sysconf() function on s390 e.g. with
2189 _SC_LEVEL1_ICACHE_SIZE as argument.
2191 * A buffer overflow in gethostbyname_r and related functions performing DNS
2192 requests has been fixed. If the NSS functions were called with a
2193 misaligned buffer, the buffer length change due to pointer alignment was
2194 not taken into account. This could result in application crashes or,
2195 potentially arbitrary code execution, using crafted, but syntactically
2196 valid DNS responses. (CVE-2015-1781)
2198 * The time zone file parser has been made more robust against crafted time
2199 zone files, avoiding heap buffer overflows related to the processing of
2200 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2201 large time zone data files. Overly long time zone specifiers in the TZ
2202 variable no longer result in stack overflows and crashes.
2204 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2205 for LD and GD on x86 and x86-64, has been implemented. You will need
2206 binutils-2.24 or later to enable this optimization.
2208 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2209 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2210 Hat). These updates cause user visible changes, such as the fix for bug
2213 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2214 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2215 condition in some applications.
2217 * Added vector math library named libmvec with the following vectorized x86_64
2218 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2220 The library can be disabled with --disable-mathvec. Use of the functions is
2221 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2222 Shared library libmvec.so is linked in as needed when using -lm (no need to
2223 specify -lmvec explicitly for not static builds).
2224 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2226 * A new fmemopen implementation has been added with the goal of POSIX
2227 compliance. The new implementation fixes the following long-standing
2228 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2229 old implementation is still present for use be by existing binaries.
2231 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2232 releases. It has been fixed to match 2.19 and older, but binaries built
2233 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2235 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2236 Contributed by Roland McGrath (Google).
2238 * The header <regexp.h> is deprecated, and will be removed in a future
2239 release. Use of this header will trigger a deprecation warning.
2240 Application developers should update their code to use <regex.h> instead.
2242 This header was formerly part of SUS, but was deprecated in 1994 and
2243 removed from the standard in 2001. Also, the glibc implementation
2244 leaks memory. See BZ#18681 for more details.
2248 * The following bugs are resolved with this release:
2250 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2251 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2252 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2253 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2254 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2255 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2256 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2257 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2258 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2259 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2262 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2263 too little memory for the to-be-scanned arguments and overflow the
2264 allocated buffer. The implementation now correctly computes the required
2265 buffer size when using malloc, and switches to malloc from alloca as
2268 * A new semaphore algorithm has been implemented in generic C code for all
2269 machines. Previous custom assembly implementations of semaphore were
2270 difficult to reason about or ensure that they were safe. The new version
2271 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2272 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2273 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2275 * Port to Altera Nios II has been contributed by Mentor Graphics.
2277 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2278 implementations for powerpc64/powerpc64le.
2279 Implemented by Adhemerval Zanella (IBM).
2281 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2282 and powerpc64le. This may improve lock scaling of existing programs on
2283 HTM capable systems. The lock elision code is only enabled with
2284 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2285 powerpc will issue a transaction abort on every syscall to avoid side
2286 effects being visible outside transactions.
2288 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2289 AArch64. Contributed by ARM Ltd.
2291 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2293 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2294 under certain input conditions resulting in the execution of a shell for
2295 command substitution when the application did not request it. The
2296 implementation now checks WRDE_NOCMD immediately before executing the
2297 shell and returns the error WRDE_CMDSUB as expected.
2299 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2300 processing format strings with a large number of format specifiers.
2302 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2303 infinite loop if the DNS response contained a PTR record of an unexpected
2306 * The minimum GCC version that can be used to build this version of the GNU
2307 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2308 still be used to compile programs using the GNU C Library.
2310 * The GNU C Library is now built with -Werror by default. This can be
2311 disabled by configuring with --disable-werror.
2313 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2315 * The obsolete sigvec function has been removed. This was the original
2316 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2317 programs have been using instead for about 25 years. Of course, ABI
2318 compatibility for old binaries using sigvec remains intact.
2320 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2321 with newer versions of bison.
2323 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2324 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2325 registers overlay two consecutive single-precision registers. MIPS32R2
2326 introduced a new FPU mode (FR=1) where double-precision registers extend the
2327 corresponding single-precision registers which is incompatible with the
2328 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2329 require the use of FR=1 making a transition necessary. New o32 ABI
2330 extensions enable users to migrate over time from the original o32 ABI
2331 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2332 tracks the ABI of any loaded object and verifies that new objects are
2333 compatible. Mode transitions will also be requested as required and
2334 unsupportable objects will be rejected. The ABI checks include both soft and
2335 hard float ABIs for o32, n32 and n64.
2337 GCC 5 with GNU binutils 2.25 onwards:
2338 It is strongly recommended that all o32 system libraries are built using the
2339 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2340 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2341 compiler using --with-fp-32=xx to set this by default.
2345 * The following bugs are resolved with this release:
2347 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2348 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2349 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2350 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2351 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2352 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2353 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2354 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2355 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2356 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2357 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2358 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2359 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2360 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2361 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2363 * Reverted change of ABI data structures for s390 and s390x:
2364 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2365 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2366 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
2367 are preserved pointing straight to the same implementation as the old ones.
2368 Given that, new callers will simply provide a too-big buffer to these
2369 functions. Any applications/libraries out there that embed jmp_buf or
2370 ucontext_t in an ABI-relevant data structure that have already been rebuilt
2371 against 2.19 headers will have to rebuilt again. This is necessary in any
2372 case to revert the breakage in their ABI caused by the glibc change.
2374 * Support for file description locks is added to systems running the
2375 Linux kernel. The standard file locking interfaces are extended to
2376 operate on file descriptions, not file descriptors, via the use of
2377 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
2378 are associated with an open file instead of a process.
2380 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
2382 * The minimum Linux kernel version that this version of the GNU C Library
2383 can be used with is 2.6.32.
2385 * Running the testsuite no longer terminates as soon as a test fails.
2386 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
2387 with PASS or FAIL lines for individual tests. A summary of the results is
2388 printed, including a list of failing lists, and "make check" exits with
2389 error status if there were any unexpected failures. "make check
2390 stop-on-test-failure=y" may be used to keep the old behavior.
2392 * The am33 port, which had not worked for several years, has been removed
2395 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
2396 supported; they now act the same as _DEFAULT_SOURCE (but generate a
2397 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
2398 conflicted with POSIX (support for which was removed in 2.19), the
2399 interfaces those macros enabled remain available when compiling with
2400 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
2401 test macros defined.
2403 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
2405 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
2406 This may improve lock scaling of existing programs on TX capable systems.
2407 The lock elision code is only built with --enable-lock-elision=yes and
2408 then requires a GCC version supporting the TX builtins. With lock elision
2409 default mutexes are elided via __builtin_tbegin, if the cpu supports
2410 transactions. By default lock elision is not enabled and the elision code
2413 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
2414 copy the path argument. This allowed programs to cause posix_spawn to
2415 deference a dangling pointer, or use an unexpected pathname argument if
2416 the string was modified after the posix_spawn_file_actions_addopen
2419 * All supported architectures now use the main glibc sysdeps directory
2420 instead of some being in a separate "ports" directory (which was
2421 distributed separately before glibc 2.17).
2423 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
2424 On configurations that support it (all Linux configurations), it's now
2425 used regardless of the --enable-add-ons switch to configure. It is no
2426 longer possible to build such configurations without pthreads support.
2428 * Locale names, including those obtained from environment variables (LANG
2429 and the LC_* variables), are more tightly checked for proper syntax.
2430 setlocale will now fail (with EINVAL) for locale names that are overly
2431 long, contain slashes without starting with a slash, or contain ".." path
2432 components. (CVE-2014-0475) Previously, some valid locale names were
2433 silently replaced with the "C" locale when running in AT_SECURE mode
2434 (e.g., in a SUID program). This is no longer necessary because of the
2437 * On x86-64, the dynamic linker's lazy-binding support is now compatible
2438 with application code using Intel MPX instructions. (With all previous
2439 versions, the MPX register state could be clobbered when making calls
2440 into or out of a shared library.) Note that while the new dynamic
2441 linker is compatible with all known x86 hardware whether or not it
2442 supports Intel MPX, some x86 instruction-set emulators might fail to
2443 handle the new instruction encodings. This is known to affect Valgrind
2444 versions up through 3.9 (but will be fixed in the forthcoming 3.10
2445 release), and might affect other tools that do instruction emulation.
2447 * Support for loadable gconv transliteration modules has been removed.
2448 The support for transliteration modules has been non-functional for
2449 over a decade, and the removal is prompted by security defects. The
2450 normal gconv conversion modules are still supported. Transliteration
2451 with //TRANSLIT is still possible, and the //IGNORE specifier
2452 continues to be supported. (CVE-2014-5119)
2454 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
2455 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
2456 resulting a denial-of-service security vulnerability in applications which
2457 use functions related to iconv. (CVE-2014-6040)
2461 * The following bugs are resolved with this release:
2463 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
2464 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
2465 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
2466 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
2467 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
2468 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
2469 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
2470 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
2471 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
2472 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
2473 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
2474 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
2475 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
2476 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
2477 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
2478 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
2479 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
2480 16431, 16453, 16474, 16506, 16510, 16529
2482 * Slovenian translations for glibc messages have been contributed by the
2483 Translation Project's Slovenian team of translators.
2485 * The public headers no longer use __unused nor __block. This change is to
2486 support compiling programs that are derived from BSD sources and use
2487 __unused internally, and to support compiling with Clang's -fblock
2488 extension which uses __block.
2490 * CVE-2012-4412 The strcoll implementation caches indices and rules for
2491 large collation sequences to optimize multiple passes. This cache
2492 computation may overflow for large collation sequences and may cause a
2493 stack or buffer overflow. This is now fixed to use a slower algorithm
2494 which does not use a cache if there is an integer overflow.
2496 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
2497 rules for large collation sequences to optimize multiple passes and falls
2498 back to alloca if malloc fails, resulting in a possible stack overflow.
2499 The implementation now falls back to an uncached collation sequence lookup
2502 * CVE-2013-4788 The pointer guard used for pointer mangling was not
2503 initialized for static applications resulting in the security feature
2504 being disabled. The pointer guard is now correctly initialized to a
2505 random value for static applications. Existing static applications need
2506 to be recompiled to take advantage of the fix (bug 15754).
2508 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
2509 to the d_name member of struct dirent, or omit the terminating NUL
2510 character. (Bugzilla #14699).
2512 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
2513 aligned_alloc functions could allocate too few bytes or corrupt the
2514 heap when passed very large allocation size values (Bugzilla #15855,
2517 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
2518 for AF_INET6 has been fixed (Bugzilla #16072).
2520 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
2521 pap_CW, quz_PE, the_NP.
2523 * Substantially revised locales: gd_GB, ht_HT
2525 * The LC_ADDRESS field was updated to support country_car for almost all
2528 * ISO 1427 definitions were updated.
2530 * ISO 3166 definitions were updated.
2532 * The localedef utility now supports --big-endian and --little-endian
2533 command-line options to generate locales for a different system from that
2534 for which the C library was built.
2536 * Binary locale files now only depend on the endianness of the system for
2537 which they are generated and not on other properties of that system. As a
2538 consequence, binary files generated with new localedef may be incompatible
2539 with old versions of the GNU C Library, and binary files generated with
2540 old localedef may be incompatible with this version of the GNU C Library,
2541 in the following circumstances:
2543 + Locale files may be incompatible on m68k systems.
2545 + Locale archive files (but not separate files for individual locales) may
2546 be incompatible on systems where plain "char" is signed.
2548 * The configure option --disable-versioning has been removed. Builds with
2549 --disable-versioning had not worked for several years.
2551 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
2552 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
2554 * SystemTap probes for malloc have been introduced.
2556 * SystemTap probes for slow multiple precision fallback paths of
2557 transcendental functions have been introduced.
2559 * Support for powerpc64le has been added.
2561 * The soft-float powerpc port now supports e500 processors.
2563 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
2565 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
2566 set of header declarations that are enabled by default, even when other
2567 feature test macros or compiler options such as -std=c99 would otherwise
2568 disable some of those declarations.
2570 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
2571 conflict with POSIX. The libbsd-compat library (which was a dummy library
2572 that did nothing) has also been removed.
2574 * Preliminary documentation about Multi-Thread, Async-Signal and
2575 Async-Cancel Safety has been added.
2577 * Change of ABI data structures for s390 and s390x:
2578 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
2579 allow for future hardware extensions. All library functions that accept or
2580 return these structures were versioned in order to provide backwards
2581 compatibility with existing code. However, not all cases can be handled
2582 with interface versioning. If an application embeds either structure into
2583 another structure and that structure is passed to another compilation unit
2584 which expects the newer larger-sized object then any access to the new
2585 fields will result in undefined behaviour. Similarly any access to fields
2586 that were moved by the enlarging of the structures will cause undefined
2587 behaviour. To fix the undefined behaviour all objects that are part of the
2588 final in-memory image must agree on the size of structures, and this may
2589 require recompilation.
2593 * The following bugs are resolved with this release:
2595 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
2596 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
2597 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
2598 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
2599 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
2600 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
2601 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
2602 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
2603 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
2604 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
2605 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
2606 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
2607 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
2610 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
2611 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
2612 Distributions can re-enable building and using pt_chown via the new configure
2613 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
2614 considerable security risks and should only be used if the distribution
2615 understands and accepts the risks.
2617 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
2620 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
2621 fixed (Bugzilla #15330).
2623 * Add support for calling C++11 thread_local object destructors on thread
2624 and program exit. This needs compiler support for offloading C++11
2625 destructor calls to glibc.
2627 * Improved worst case performance of libm functions with double inputs and
2630 * Support for priority inherited mutexes in pthread condition variables on
2631 non-x86 architectures.
2633 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
2635 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
2637 * Optimized string functions for ARM. Implemented by Will Newton and
2640 * Optimized libm functions for SPARC. Implemented by David S. Miller.
2642 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
2645 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
2646 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
2648 * Added a benchmark framework to track performance of functions in glibc.
2650 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
2651 It is based on draft TS 18661 and currently enabled as a GNU extension.
2653 * On Linux, the clock function now uses the clock_gettime system call
2654 for improved precision, rather than old times system call.
2656 * Added support for version-3 tz format files. This is needed when using
2657 the tz database release 2013e or later, and affects a few unusual cases --
2658 currently only TZ='America/Godthab' for time stamps after 2037.
2660 * Added new API functions pthread_getattr_default_np and
2661 pthread_setattr_default_np to get and set the default pthread
2662 attributes of a process.
2664 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
2665 This may improve lock scaling of existing programs on TSX capable systems.
2666 When the --enable-lock-elision=yes parameter is specified at configure
2667 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2670 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2671 availability). Implemented by Ryan S. Arnold.
2673 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2677 * The following bugs are resolved with this release:
2679 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2680 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2681 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2682 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2683 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2684 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2685 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2686 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2687 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2688 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2689 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2690 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2691 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2692 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2693 14879, 14889, 14893, 14898, 14914.
2695 * Optimization of memcpy for MIPS.
2697 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2698 EMFILE has been fixed (Bugzilla #14889).
2700 * The add-on ports collection is now distributed in the "ports" subdirectory
2701 of the main GNU C Library distribution, rather than separately.
2703 * Port to ARM AArch64 contributed by Linaro.
2705 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2706 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2708 Implemented by Andreas Krebbel.
2710 * The new function secure_getenv allows secure access to the environment,
2711 returning NULL if running in a SUID/SGID process. This function replaces
2712 the internal function __secure_getenv.
2714 * SystemTap static probes have been added into the dynamic linker.
2715 Implemented by Gary Benson.
2717 * Optimizations of string functions strstr, strcasestr and memmem.
2718 Implemented by Maxim Kuvyrkov.
2720 * The minimum Linux kernel version that this version of the GNU C Library
2721 can be used with is 2.6.16.
2723 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2724 powerpc POWER7. Implemented by Will Schmidt.
2726 * New configure option --disable-nscd builds the C library such that it
2727 never attempts to contact the Name Service Caching Daemon (nscd).
2728 New configure option --disable-build-nscd avoids building nscd itself;
2729 this is the default if --disable-nscd is used.
2731 * Improved support for cross-compilation, including cross-testing and
2732 bootstrap builds without a previously built glibc.
2734 * Several testsuite tests are now able to test multiple IFUNC variants of an
2735 interface, rather than just testing the one that would be chooen by
2738 * New configure options --with-bugurl and --with-pkgversion, for
2739 distributors to use to embed their bug-reporting and package version
2740 information in --help and --version output.
2742 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2743 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2744 allows creation of chroots without the procfs mounted on /proc.
2746 * The `crypt' function now fails if passed salt bytes that violate the
2747 specification for those values. On Linux, the `crypt' function will
2748 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2749 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2750 when the mode is enabled.
2752 * The `clock_*' suite of functions (declared in <time.h>) is now available
2753 directly in the main C library. Previously it was necessary to link with
2754 -lrt to use these functions. This change has the effect that a
2755 single-threaded program that uses a function such as `clock_gettime' (and
2756 is not linked with -lrt) will no longer implicitly load the pthreads
2757 library at runtime and so will not suffer the overheads associated with
2758 multi-thread support in other code such as the C++ runtime library.
2760 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2765 * The following bugs are resolved with this release:
2767 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2768 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2769 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2770 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2771 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2772 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2773 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2774 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2775 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2776 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2777 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2778 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2779 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2780 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2781 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2782 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2783 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2784 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2785 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2786 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2787 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2788 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2791 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2792 configuring glibc with:
2793 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2794 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2795 Implemented by H.J. Lu.
2799 + define static_assert
2801 + do not declare gets
2803 + declare at_quick_exit and quick_exit also for ISO C11
2805 + aligned_alloc. NB: The code is deliberately allows the size parameter
2806 to not be a multiple of the alignment. This is a moronic requirement
2807 in the standard but it is only a requirement on the caller, not the
2810 + timespec_get added
2812 + uchar.h support added
2814 + CMPLX, CMPLXF, CMPLXL added
2816 Implemented by Ulrich Drepper.
2818 * Support for the IA-64 has been moved to ports.
2820 * Remove support for anything but ELF binary format
2822 * Checking versions of poll, ppoll added.
2823 Implemented by Ulrich Drepper.
2825 * More generic and 64-bit performance optimizations to math functions.
2826 Implemented by Ulrich Drepper.
2828 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2829 headers and functions available at compile time as they were before
2830 version 2.14. This option will be removed at some time in the future
2831 after the TI-RPC library becomes fully sufficient for the needs of
2832 existing applications.
2834 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2835 Note that glibc is not expected to work with any Linux kernel version
2838 * New header <sys/auxv.h> and function getauxval allowing easy access to
2839 the AT_* key-value pairs passed from the Linux kernel. The header also
2840 defines the HWCAP_* bits associated with the AT_HWCAP key.
2842 * New locales: mag_IN
2844 * New configure option --enable-systemtap builds SystemTap static probes
2845 into libc for setjmp and longjmp and into libpthread for various operations.
2846 So far the setjmp/longjmp probes and some of the libpthread probes are
2847 provided only for i*86 and x86_64.
2848 Implemented by Roland McGrath and Rayson Ho.
2850 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2852 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2855 * More optimized functions for SPARC. Implemented by David S. Miller.
2857 * Improved support for cross-compilation, especially bootstrap builds
2858 without a previously built glibc.
2860 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2861 Chris Metcalf from Tilera.
2863 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2864 now supported for ARM processors.
2866 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2867 as the name of the dynamic linker, to distinguish it from the
2868 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2870 * Support for CRIS has been removed from ports.
2872 * A new class of installed header has been documented for low-level
2873 platform-specific functionality. PowerPC added the first instance with a
2874 function to provide time base register access. Contributed by Tulio
2875 Magno Quites Machado Filho.
2877 * ix86 configurations now install header files that are consistent with
2878 what x86-64 configurations install. These same header files can be used
2879 for -m32, -m64, or -mx32 builds.
2880 Contributed by H.J. Lu.
2882 * Math library bug fixes. A thorough audit of all open math library bugs was
2883 conducted by Joseph Myers. Significant progress was made on many math
2884 library bugs resulting in more accurate exceptions and function results.
2885 Many thanks to all those that contributed including Andreas Jaeger for his
2886 patch review and work on the x87 trigonometric instruction issues.
2888 * Timezone data is no longer installed. Timezone-related binaries and scripts
2889 will continue to be installed. Users should obtain their timezone data from
2890 their distribution provider or from the tzdata package at
2891 <ftp://munnari.oz.au/pub/>.
2895 * The following bugs are resolved with this release:
2897 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
2898 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
2899 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
2900 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
2901 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
2902 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
2903 13484, 13506, 13515, 13523, 13524, 13538, 13540
2905 * New program pldd to list loaded object of a process
2906 Implemented by Ulrich Drepper.
2908 * Add nss_db support back to glibc. No more dependency on Berkeley db
2909 and support for initgroups lookups.
2910 Implemented by Ulrich Drepper.
2912 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
2913 Contributed by HJ Lu.
2915 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
2916 Contributed by HJ Lu.
2918 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
2919 on x86-32 and x86-64.
2920 Contributed by Liubov Dmitrieva.
2922 * Optimized strchr and strrchr for SSE on x86-32.
2923 Contributed by Liubov Dmitrieva.
2925 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
2926 for x86-64 and x86-32.
2927 Contributed by Liubov Dmitrieva.
2929 * New interfaces: scandirat, scandirat64
2930 Implemented by Ulrich Drepper.
2932 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
2933 Implemented by Ulrich Drepper.
2935 * nscd now also caches the netgroup database.
2936 Implemented by Ulrich Drepper.
2938 * Integrate libm with gcc's -ffinite-math-only option.
2939 Implemented by Ulrich Drepper.
2941 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
2942 to math functions. Implemented by Ulrich Drepper.
2944 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
2945 Implemented by Ulrich Drepper.
2947 * New Linux interfaces: process_vm_readv, process_vm_writev
2949 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
2950 Implemented by Ulrich Drepper.
2952 * Optimized nearbyint and strcasecmp for PPC.
2953 Implemented by Adhemerval Zanella.
2955 * New locales: bho_IN, unm_US, es_CU, ta_LK
2959 * The following bugs are resolved with this release:
2961 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
2962 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
2963 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
2964 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
2965 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
2966 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
2967 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
2968 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
2969 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
2970 12795, 12811, 12813, 12814, 12841
2972 * The RPC implementation in libc is obsoleted. Old programs keep working
2973 but new programs cannot be linked with the routines in libc anymore.
2974 Programs in need of RPC functionality must be linked against TI-RPC.
2975 The TI-RPC implementation is IPv6 enabled and there are other benefits.
2977 Visible changes of this change include (obviously) the inability to link
2978 programs using RPC functions without referencing the TI-RPC library and the
2979 removal of the RPC headers from the glibc headers.
2980 Implemented by Ulrich Drepper.
2982 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
2983 syncfs, setns, sendmmsg
2985 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
2986 yue_HK, lij_IT, mhr_RU
2988 * New encodings: CP770, CP771, CP772, CP773, CP774
2990 * New program sotruss to trace calls through PLTs
2991 Implemented by Ulrich Drepper.
2993 * The malloc hook implementation is marked deprecated and will be removed
2994 from the default implementation in the next version. The design never
2995 worked ever since the introduction of threads. Even programs which do
2996 not create threads themselves can use multiple threads created internally.
3000 * The following bugs are resolved with this release:
3002 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3003 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3004 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3005 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3008 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3010 * POWER7 optimizations: memset, memcmp, strncmp
3012 * New optimized string functions for x86-64: strnlen (SSE2),
3013 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3014 Implemented by Ulrich Drepper.
3018 * The following bugs are resolved with this release:
3020 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3021 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3022 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3023 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3024 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3025 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3026 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3027 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3029 * New interfaces: pthread_getname_np, pthread_setname_np
3031 * New Linux interface: recvmmsg
3033 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3035 * The dynamic linker now recognizes supported ABI versions from the
3036 EI_ABIVERSION field in the ELF header.
3037 Implemented by Ulrich Drepper.
3039 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3040 will not be used to fill in password fields in the passwd.byname replies.
3041 Instead it is used to synthesize the shadow.byname table, should it be
3042 missing. This is a useful mode in some installations involving Solaris.
3043 Implemented by Ulrich Drepper.
3045 * New locales: kok_IN, sq_MK, cv_RU
3049 * The following bugs are resolved with this release:
3051 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3052 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3053 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3054 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3055 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3056 10789, 10817, 10823, 10840, 10847
3058 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3060 Implemented by Ulrich Drepper.
3062 * Checking version of longjmp added that fails if an uninitialized stack
3063 frame would be created. Implemented by Ulrich Drepper.
3065 * STT_GNU_IFUNC is now supported in static executables.
3066 Implemented by H.J. Lu.
3068 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3070 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3071 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3072 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3073 Contributed by H.J. Lu.
3075 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3076 Implemented by Ulrich Drepper.
3078 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3080 Contributed by H.J. Lu.
3082 * Support for fma instruction in AVX on x86-64.
3083 Implemented by H.J. Lu and Ulrich Drepper.
3085 * AVX support in x86-64 auditing support in ld.so.
3086 Implemented by H.J. Lu.
3088 * STB_GNU_UNIQUE support added.
3089 Implemented by Ulrich Drepper.
3091 * Implement second fallback mode for optimized DNS lookup for even more
3092 broken environments. If two requests from the same port are not
3093 handled correctly close the socket and open a new one before sending
3094 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3095 can be used to select this mode right away, instead of rediscovering the
3096 necessity is every process again.
3097 Implemented by Ulrich Drepper.
3099 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3100 Implemented by Adam Tkac.
3102 * Optimized iconv conversions for S390x.
3103 Implemented by Andreas Krebbel.
3105 * Using condvars with PI mutexes is now more efficient due to kernel
3106 support for requeueing to PI futexes. NPTL support added for x86-64.
3107 Implemented by Ulrich Drepper.
3109 * New locales: ps_AF, my_MM
3113 * The following bugs are resolved with this release:
3115 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3116 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3117 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3118 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3119 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3121 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3122 Implemented by Ulrich Drepper.
3124 * New Linux interfaces: accept4, fallocate, fallocate64.
3125 Implemented by Ulrich Drepper.
3127 * Correct declarations of string function when used in C++ code. This
3128 could lead to compile errors for invalid C++ code.
3130 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3133 * New POSIX 2008 interface: psiginfo
3134 Implemented by Ulrich Drepper.
3136 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3137 Implemented by Ulrich Drepper.
3139 * Support for selecting between multiple function definitions at runtime
3140 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3142 * The libcrypt library can now use the hash function implementations in
3143 NSS. Implemented by Ulrich Drepper.
3145 * The malloc implementation can be compiled to be less memory efficient
3146 but higher performing in multi-threaded programs.
3147 Implemented by Ulrich Drepper.
3149 * New locales: nan_TW@latin, ks_IN
3151 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3152 Implemented by Ulrich Drepper.
3154 * Extended printf hook support. It is possible to use user-defined types
3155 and extend existing format specifiers.
3156 Implemented by Ulrich Drepper.
3158 * Handling for group shadow files has been added.
3159 Implemented by Ulrich Drepper.
3161 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3162 servers (the case, e.g., for some people using the built-in DNS
3163 server in ADSL modems/routers). There is a once-per-process timeout
3164 in case of a broken server. To avoid it, users can run nscd or put
3165 'options single-request' in /etc/resolv.conf.
3166 Implemented by Ulrich Drepper.
3170 * The following bugs are resolved with this release:
3172 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3173 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3174 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3175 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3176 6968, 6974, 6980, 6995, 7008, 7009, 7029
3178 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3179 up at the same time. Implemented by Ulrich Drepper.
3181 * TLS descriptors for LD and GD on x86 and x86-64.
3182 Implemented by Alexandre Oliva.
3184 * getaddrinfo now handles DCCP and UDPlite.
3185 Implemented by Ulrich Drepper.
3187 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3188 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3189 Implemented by Ulrich Drepper.
3191 * New implementation of memmem, strstr, and strcasestr which is O(n).
3192 Implemented by Eric Blake.
3194 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3196 * Implement "e" option for popen to open file descriptor with the
3197 close-on-exec flag set. Implemented by Ulrich Drepper.
3199 * Implement "b" mode for fmemopen. In this mode writes writes don't
3200 implicitly add a NUL byte and seeks from the end of the buffer really
3201 use the buffer end, not the string length as the basis.
3202 Implemented by Ulrich Drepper.
3204 * Many functions, exported and internal, now atomically set the close-on-exec
3205 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3207 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3209 Implemented by Pravin Satpute.
3211 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3215 * The following bugs are resolved with this release:
3217 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3218 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3219 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3220 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3221 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3222 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3223 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3225 * New locales: bo_CN, bo_IN, shs_CA.
3227 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3229 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3230 Implemented by Pravin Satpute.
3232 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3234 * nscd caches now all timeouts for DNS entries
3235 Implemented by Ulrich Drepper.
3237 * nscd is more efficient and wakes up less often.
3238 Implemented by Ulrich Drepper.
3240 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3241 vdprintf, and obstack_vprintf.
3242 Implemented by Jakub Jelinek.
3244 * Faster memset for x86-64.
3245 Implemented by Harsha Jagasia and H.J. Lu.
3247 * Faster memcpy on x86.
3248 Implemented by Ulrich Drepper.
3250 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3251 Implemented by Ulrich Drepper.
3253 * Faster sqrt and sqrtf implemention for some PPC variants.
3254 Implemented by Steven Munroe.
3258 * The following bugs are resolved with this release:
3260 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3261 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3262 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3263 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3264 5071, 5103, 5104, 5112, 5113, 5184, 5186
3266 * More checking functions: fread, fread_unlocked, open*, mq_open.
3267 Implemented by Jakub Jelinek and Ulrich Drepper.
3269 * Extend fortification to C++. Implemented by Jakub Jelinek.
3271 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3272 by not recognizing 'a' as a modifier when those specs are requested.
3273 Implemented by Jakub Jelinek.
3275 * PPC optimizations to math and string functions.
3276 Implemented by Steven Munroe.
3278 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3279 options to be passed. Implemented by Ulrich Drepper.
3281 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3283 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3284 Implemented by Ulrich Drepper.
3286 * Handle private futexes in the NPTL implementation.
3287 Implemented by Jakub Jelinek and Ulrich Drepper.
3289 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3290 Implemented by Roland McGrath and Ulrich Drepper.
3292 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3294 * SHA-256 and SHA-512 based password encryption.
3295 Implemented by Ulrich Drepper.
3297 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3298 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3301 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3302 Implemented by Ulrich Drepper.
3306 * The following bugs are resolved with this release:
3308 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3309 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3310 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3311 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3312 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3313 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3314 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3317 * New Linux interfaces: epoll_pwait, sched_getcpu.
3319 * New generic interfaces: strerror_l.
3321 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3325 * The following bugs are resolved with this release:
3327 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3328 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3329 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3330 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3331 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3332 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3333 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3334 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3335 3225, 3251, 3252, 3253, 3273
3337 * For Linux, the sorting of addresses returned by getaddrinfo now also
3338 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3339 Implemented by Ulrich Drepper.
3341 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3342 Implemented by Ulrich Drepper.
3344 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3346 * New iconv module for MIK. Contributed by Alexander Shopov.
3348 * For sites with broken group and/or passwd database, the auto-propagate
3349 option of nscd can prevent creating ID lookup entries from the results
3350 of a name lookup and vice versa. This usually is no problem but some
3351 site might have problems with the default behavior.
3352 Implemented by Ulrich Drepper.
3354 * Iterating over entire database in NIS can be slow. With the
3355 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3356 to trade time for memory. The entire database will be read at once.
3357 Implemented by Ulrich Drepper.
3359 * The interfaces introduced in RFC 3542 have been implemented by
3362 * Support for the new ELF hash table format was added by Ulrich Drepper.
3364 * Support for priority inheritance mutexes added by Jakub Jelinek and
3367 * Support for priority protected mutexes added by Jakub Jelinek.
3369 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
3370 or_IN, csb_PL, fy_NL, sr_ME.
3374 * More overflow detection functions.
3376 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
3377 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
3379 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
3380 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
3381 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
3382 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
3383 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
3384 by Masahide Washizawa.
3386 * It is now possible to install audit libraries for the dynamic linker using
3387 LD_AUDIT. Implemented by Ulrich Drepper.
3389 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
3390 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
3391 For a libc and libpthread that works well on Linux 2.4 kernels, we
3392 recommend using the stable 2.3 branch.
3394 * The new function open_wmemstream acts like open_memstream,
3395 but uses a wchar_t wide character buffer.
3397 * The new function ppoll is an improved version of poll, similar to pselect.
3399 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
3400 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
3401 renameat, unlinkat, linkat, symlinkat, readlinkat.
3403 * New Linux kernel system calls: unshare,
3404 inotify_init, inotify_add_watch, inotify_rm_watch.
3406 * The euidaccess function is now also known by the alias eaccess,
3407 for compatibility with some other systems.
3409 * Timezone data updated to 2006b version.
3413 * The following bugs are resolved with this release:
3415 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
3416 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
3417 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
3418 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
3419 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
3420 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
3422 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3424 * As of this release, GCC 4 can be used to compile the C Library.
3426 * Timezone data updated to 2005m version.
3430 * The following bugs are resolved with this release:
3432 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
3433 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
3434 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
3435 777, 787, 821, 822, 823, 825
3437 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3441 * Support for RFC 3678. Real implementations exist only for Linux so far.
3442 Implemented by Ulrich Drepper.
3444 * nscd can now cache entries persistently. Expiring entries are reloaded.
3445 For speedups the cache can be shared in memory with client processes.
3446 Implemented by Ulrich Drepper.
3448 * nscd can now perform SELinux checks.
3449 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
3451 * getaddrinfo queries are now cached. Canonical name lookup is performed
3453 Implemented by Ulrich Drepper.
3455 * The nothrow function attribute is used when headers are used by gcc when
3456 compiling C code. This can avoid significant amounts of exception
3459 * The malloc functions perform more error checking and are stricter when
3460 it comes to reacting on errors. The default action is to terminate
3461 the process after showing an error message. Implemented by Ulrich Drepper.
3463 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
3464 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
3466 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
3467 namespaces using the new function dlmopen(). This feature is of course,
3468 like most other dynamic loading functionality, not available in statically
3469 linked applications. Implemented by Ulrich Drepper.
3471 * Low-overhead boundary checking variants of string and some stdio functions
3472 were added. These are to be used in conjunction with a gcc patch by
3473 Jakub Jelinek which adds calls to these functions if possible.
3474 Implemented by Jakub Jelinek and Ulrich Drepper.
3476 * Old code for several operating systems and machine architectures that
3477 have not been in working condition in a long time have been removed from
3478 the main source tree maintained by the GNU C Library's maintainers.
3479 These files are now reside in the separate `ports' source module
3480 that is usable as an add-on when building the library.
3484 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
3485 interrogate the dynamic linker, compatible with the Solaris interface.
3487 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
3488 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
3490 * getifaddrs now uses the netlink interface on Linux to get its information.
3491 Implemented by Thorsten Kukuk.
3493 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
3494 Implemented by Ulrich Drepper.
3496 * support for non-executable stacks on x86 has been added. Changes mostly
3499 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
3502 * getaddrinfo now performs destination address selection according to
3507 * Thread-safe interfaces for many functions that access locale data
3508 were added in version 2.3, but these features were omitted from NEWS.
3509 Many functions have variants with an `_l' suffix that take a `locale_t'
3510 object as a parameter rather than consulting the current locale.
3511 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
3512 create and maintain `locale_t' objects. Additionally, the new function
3513 `uselocale' sets "the current locale" (as used by functions not so
3514 parameterized) set for an individual thread. These features were added
3515 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
3517 * The functions getresuid, getresgid, setresuid, and setresgid, which
3518 have long been available on Linux, are now declared in <unistd.h>
3519 and are now also available on the Hurd.
3521 * ELF thread-local storage support (TLS) now works on x86-64.
3523 * The new dynamic string token $LIB is expanded in shared library names.
3524 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
3526 * Aldy Hernandez contributed complete software floating point support for
3527 PowerPC machines with no FPU.
3529 * fexecve is implemented on Linux.
3531 * The `btowc' function should work at least twice as fast due to
3532 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
3534 * With approriate thread add-ons cancelable functions are now implemented
3535 in libc.so as well. No need to call the function in libpthread. This
3536 change allowed to finally disable the incorrect and expensive handling
3537 of weak definition in ld.so.
3539 * Yet more PLT entries in libc.so have been removed. We finally arrived
3540 at the bare minimum. Startup times improved appropriately.
3542 * Support for the new Linux/x86 system call interface was added. The
3543 AT_SYSINFO auxiliary vector entry is recognized and handled.
3547 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
3550 * iconv (the program and the interface) now accepts empty names (excluding
3551 options like //TRANSLIT) to mean "use charset of current locale".
3553 * localedef can now transliterate characters in strings which are not in
3554 the provided charmap. The information from the input locale is used.
3556 * Prelinking support was added for ELF targets. This requires additional
3557 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
3559 * Read-only stdio streams now use mmap to speed up operation by eliminating
3560 copying and buffer underflows. To use add 'm' to the mode string of
3561 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
3563 * The malloc functions were completely rewritten by Wolfram Gloger based
3564 on Doug Lea's malloc-2.7.0.c.
3566 * Isamu Hasegawa contributed a completely new and POSIX-conformant
3567 implementation of regex.
3569 * Bruno Haible upgraded the iconv and locale implementation to support
3572 * Contents of the LC_* and LANG environment variables in the CEN style are
3573 not recognized anymore. It never was used. Change by Ulrich Drepper.
3575 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
3576 thread-local storage (TLS) ABI on some platforms.
3577 Changes by Ulrich Drepper. SH support by Kaz Kojima.
3579 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
3580 EUC-JISX0213, and TSCII.
3582 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
3583 BSD-compatible interface for getting all network interface addresses.
3584 Implementation for IPv4 by Roland McGrath.
3586 * Loading of locale data is faster due to the introduction of a locale
3587 archive. Implemented by Roland McGrath and Ulrich Drepper.
3589 * Startup times are significantly reduced by not using exported functions
3590 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
3593 * Steven Munroe contributed a port to PowerPC64/Linux.
3597 * The Hurd now uses the GNU libio implementation of stdio rather than the
3598 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
3600 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
3601 with the same behavior as the Linux system call of the same name.
3605 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
3606 128-bit long double format.
3608 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
3609 IBM1161, and IBM1162 charsets.
3611 * Andreas Jaeger contributed a port to x86-64/Linux.
3613 * Peter Bruin contributed a port to PowerPC/Hurd.
3615 * libc functions using I/O streams now can handle wide-oriented streams
3618 * optimizations in the dynamic linker. Binaries created by recent binutils
3619 versions start up quicker due to reduced time spent on relocations.
3621 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
3625 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
3626 asinh, atanh, j0 for the 128-bit long double format.
3628 * Bruno Haible updated all the code handling Unicode in some form to
3629 support Unicode 3.1.
3631 * Speed of regex for single-byte locales is back to previous levels.
3632 Patch by Isamu Hasegawa.
3634 * Alpha, SPARC, and IA-64 now also using floating stacks.
3636 * Startup time of internationalized applications greatly improved through
3637 iconv cache. Use iconvconfig to generate the cache file.
3638 Contributed by Ulrich Drepper.
3640 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
3641 severe performance problems. Patch by David Mosberger.
3643 * The Hurd port got a lot more functionality like AIO, various stdio
3644 extensions, etc. Mainly done by Roland McGrath.
3646 * mtrace can now lookup symbols in shared libraries.
3650 * Intel's IA-64 math library is largely integrated. It provides fast and
3651 accurate implementatations for most basic and standard math functions
3652 in float, double, and long double format.
3654 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
3655 and asin for the 96-bit long double format and asin, log, tan for the
3656 128-bit long double format.
3658 * The beginning of a last-bit accurate math library by IBM Haifa were added.
3659 The basic double functions exist today. Contributed by Abraham Ziv
3660 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
3661 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
3663 * An asynchronous name lookup library was added. The interface is designed
3664 after POSIX AIO. The proposal was circulated beforehand to get comments.
3665 No negative ones came in. Implemented by Ulrich Drepper.
3667 * Port to S390/64bit contributed by Martin Schwidefsky
3668 <schwidefsky@de.ibm.com>.
3670 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3671 of functions for Linux/IA-64.
3673 * The RPC code is now thread safe. Threads can now use the same service
3674 of different services at the same time. Patch by Eric Norum
3675 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3677 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3678 family of functions for Linux/S390.
3680 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3681 of functions for Linux/x86.
3683 * Port to Linux/CRIS contributed by Axis Communications.
3687 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3688 we can now check for namespace violations and missing declarations. The
3689 result is that almost all headers are now Unix-compliant (as defined in
3690 the upcoming XPG6). The negative side is that some programs might need
3691 corrections, too, if they depend on the incorrect form of the headers in
3692 previous versions which defined too many symbols and included too many
3695 * regex now handles multibyte character sets correctly.
3696 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3698 * iconv (the program) does now conform to the upcoming XPG6 and handles
3699 charmaps. Instead of the charset names the path of charmaps can be
3700 provided and the conversion happens based on this data.
3701 Contributed by Ulrich Drepper.
3703 * The locale program now provides detailed information about the installed
3708 only lists the names of the supported locales
3712 provides details such as country, language, and codeset name.
3713 Contributed by Ulrich Drepper.
3717 * The gencat program now parses the input file according to the charset
3718 selected by the LC_CTYPE category. This is important for stateful
3719 character sets. To make generating catalogs easier there is a way
3720 to overwrite the charset selected by the locale: before the first
3721 message or $ quote line the catalog can contain a line like
3723 $ codeset=ISO-8859-2
3725 to select the charset (ISO-8859-2 in this case).
3727 Implemented by Shinya Hanataka and Ulrich Drepper.
3729 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3730 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3731 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3733 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3734 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3736 * The LANGUAGE environment variable is now ignored unless the locale is
3737 changed from the default "C" locale.
3739 * The usual bug fixes.
3743 * Greg McGary added runtime support for bounds checking using gcc's
3744 new -fbounded-pointers option. ix86 target is complete. PowerPC
3747 * Thorsten Kukuk added secure mode support to nscd.
3749 * The Berkeley db libraries have been removed.
3751 Related, the nss_db module is now in a separate package since it
3752 obviously requires a database library being available.
3754 * Wide character I/O streams implemented by Ulrich Drepper.
3756 * Functions from the extended socket API added by Ulrich Drepper.
3758 * Functions feenableexcept and fedisableexcept to control the
3759 behaviour of individual exceptions have been added by Andreas Jaeger.
3761 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3763 * The resolver code has been updated from bind 8.2.3-T5B which supports
3764 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3767 This change could in some situations effect backward compatibility. Since
3768 now `_res' is a thread-local instead of a global variable, modifying it
3769 in one thread does not have any effect in other threads.
3771 The resolver library was also extended to allow IPv6 as the transport
3772 protocol for the requests. This work was done by Stig Venaas.
3774 * Compatibility code for K&R C compilers has been removed from the
3775 header files. A ISO C compiler is needed to use the library
3776 (conforming to either C89 or C99 standard).
3778 * Complete rewrite of the localedef program to support multibyte character
3779 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3780 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3781 Implemented by Ulrich Drepper.
3783 Bruno Haible significantly improved the generation and use of the data
3784 structures for the wide character tables.
3786 * Plural handling in gettext implemented by Ulrich Drepper.
3788 * The utmp daemon has been removed.
3790 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3792 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3795 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3797 * POSIX barriers implemented by Kaz Kylheku.
3799 * POSIX spawn function family implemented by Ulrich Drepper.
3801 * POSIX spinlocks are now available.
3803 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3805 * the configure option --enable-kernel=X.Y.Z allows to strip out
3806 compatibility for kernel versions before X.Y.Z. This is currently only
3807 implemented for Linux.
3809 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3810 field sin6_scope_id. This means that all programs using IPv6 should be
3811 recompiled. Don't expect binary compatibility with previous glibc
3814 * various conversion modules for IBM character sets contributed by
3817 * IA-64 port by Jes Sorensen and HJ Lu.
3831 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3833 * New xdr functions are added; some rpc functions are now 64bit clean.
3835 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3837 * Fixed known incompatibilities with glibc 2.0.
3839 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3841 * Optimized a number of functions (especially the ELF dynamic loader).
3843 * Update timezone data files.
3845 * lots of charmaps corrections
3847 * some new locale definitions and charmaps
3852 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3853 conform to POSIX member type requirements. Symbol versions have been
3854 adjusted as needed within the library, and for direct use by applications,
3855 but there is potential for problems if third-party libraries use
3856 struct timeval as part of their interface. This does not present
3857 a problem for X and other "essential" system libraries.
3859 * An additional locale model to support C++ Standard Library locale
3860 model and probably more was implemented by Ulrich Drepper.
3862 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3865 * Miles Bader provided the `argp' function family to support hierachical
3866 command line argument parsing, layered on top of getopt.
3868 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3870 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3873 * scanf recognizes the %a and %A format for scanning floating point numbers.
3875 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3876 information and interfaces for the available integer types.
3878 * about 130 new math functions were added to implement the ISO C9x math
3881 * the new header <complex.h> contains definitions of the complex math
3882 functions from ISO C 9X.
3884 * the new header <tgmath.h> defines generic macros to use complex or
3885 real valued functions.
3887 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3889 * Andreas Jaeger provided a test suite for the math library.
3891 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
3893 * Ulrich Drepper added character set conversion functions (iconv).
3895 * Optimized string functions have been added.
3897 * The localedata addon is now part of glibc.
3899 * An implementation of profiling shared libraries was added by Ulrich Drepper.
3901 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
3902 daemon for NSS (nscd).
3904 Missing a better place here are some numbers on improvements. Under
3905 Linux 2.1.125 un-tar-ing the kernel sources takes
3909 using local files 12.19s 6.88s 22.91s
3911 using NIS 13.92s 8.91s 26.34s
3913 using NIS & nscd 10.37s 7.34s 25.30s
3915 using NIS+ 27.57s 30.37s 640.46s
3917 using NIS+ & nscd 10.25s 7.83s 26.51s
3919 using NIS & old nscd [1] 13.83s 8.32s 29.60s
3921 Keep in mind that non-namelookup related operations dominate above times.
3922 It was just a common complain that using NIS+ unpacking the kernel is
3925 [1] The old nscd implementation is not available anymore since it was
3926 distributed with glibc up to version 2.0.98 and thus is now replaced.
3928 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
3930 * Mark Kettenis provided a Hesiod NSS module.
3932 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
3933 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
3935 * rcmd can now handle netgroups (Dick Streefland).
3937 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
3940 * Support for the IPv6 protocol has been added to the socket API, as per the
3941 latest draft standards.
3943 * Support for Linux 2.2 has been added.
3945 * Interface changes relative to the latest 2.0.x release:
3946 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3947 addseverity NEW: Unix98
3948 alphasort64 NEW: LFS
3949 argp_err_exit_status NEW: argp, GNU ext
3950 argp_error NEW: argp, GNU ext
3951 argp_failure NEW: argp, GNU ext
3952 argp_help NEW: argp, GNU ext
3953 argp_parse NEW: argp, GNU ext
3954 argp_program_bug_address NEW: argp, GNU ext
3955 argp_program_version NEW: argp, GNU ext
3956 argp_program_version_hook NEW: argp, GNU ext
3957 argp_state_help NEW: argp, GNU ext
3958 argp_usage NEW: argp, GNU ext
3959 authdes_create NEW: Secure RPC
3960 authdes_getucred NEW: Secure RPC
3961 authdes_pk_create NEW: Secure RPC
3962 backtrace NEW: GNU ext.
3963 backtrace_symbols NEW: GNU ext.
3964 backtrace_symbols_fd NEW: GNU ext.
3966 cacosf NEW: ISO C 9x
3967 cacosh NEW: ISO C 9x
3968 cacoshf NEW: ISO C 9x
3969 cacoshl NEW: ISO C 9x
3970 cacosl NEW: ISO C 9x
3977 casinf NEW: ISO C 9x
3978 casinh NEW: ISO C 9x
3979 casinhf NEW: ISO C 9x
3980 casinhl NEW: ISO C 9x
3981 casinl NEW: ISO C 9x
3983 catanf NEW: ISO C 9x
3984 catanh NEW: ISO C 9x
3985 catanhf NEW: ISO C 9x
3986 catanhl NEW: ISO C 9x
3987 catanl NEW: ISO C 9x
3988 cbc_crypt NEW: Secure RPC
3992 ccoshf NEW: ISO C 9x
3993 ccoshl NEW: ISO C 9x
3999 cimagf NEW: ISO C 9x
4000 cimagl NEW: ISO C 9x
4001 clearerr_locked REMOVED
4002 clntunix_create NEW: sunrpc ext
4004 clog10 NEW: ISO C 9x
4005 clog10f NEW: ISO C 9x
4006 clog10l NEW: ISO C 9x
4016 cprojf NEW: ISO C 9x
4017 cprojl NEW: ISO C 9x
4019 crealf NEW: ISO C 9x
4020 creall NEW: ISO C 9x
4025 csinhf NEW: ISO C 9x
4026 csinhl NEW: ISO C 9x
4029 csqrtf NEW: ISO C 9x
4030 csqrtl NEW: ISO C 9x
4034 ctanhf NEW: ISO C 9x
4035 ctanhl NEW: ISO C 9x
4037 des_setparity NEW: Secure RPC
4038 ecb_crypt NEW: Secure RPC
4039 endutxent NEW: Unix98
4041 exp10f NEW: ISO C 9x
4042 exp10l NEW: ISO C 9x
4046 fattach NEW: STREAMS
4047 fdetach NEW: STREAMS
4051 feclearexcept NEW: ISO C 9x
4052 fegetenv NEW: ISO C 9x
4053 fegetexceptflag NEW: ISO C 9x
4054 fegetround NEW: ISO C 9x
4055 feholdexcept NEW: ISO C 9x
4057 feraiseexcept NEW: ISO C 9x
4058 ferror_locked REMOVED
4059 fesetenv NEW: ISO C 9x
4060 fesetexceptflag NEW: ISO C 9x
4061 fesetround NEW: ISO C 9x
4062 fetestexcept NEW: ISO C 9x
4063 feupdateenv NEW: ISO C 9x
4064 fflush_locked REMOVED
4068 fgets_unlocked NEW: GNU ext.
4069 fileno_locked REMOVED
4081 fputc_locked REMOVED
4082 fputs_unlocked NEW: GNU ext.
4083 fread_unlocked NEW: GNU ext.
4088 fstatvfs NEW: Unix98
4092 ftruncate64 NEW: LFS
4094 fwrite_unlocked NEW: GNU ext.
4095 gai_strerror NEW: IPv6
4099 getchar_locked REMOVED
4101 getdate_err NEW: Unix98
4102 getdate_r NEW: GNU ext.
4104 getnameinfo NEW: IPv6
4105 getnetname NEW: Secure RPC
4106 getpmsg NEW: STREAMS
4107 getpt NEW: Unix98 PTY
4108 getrlimit64 NEW: LFS
4109 getutxent NEW: Unix98
4110 getutxid NEW: Unix98
4111 getutxline NEW: Unix98
4112 glob64 NEW: GNU ext.
4113 globfree64 NEW: GNU ext.
4114 gnu_get_libc_release NEW: GNU ext.
4115 gnu_get_libc_version NEW: GNU ext.
4116 grantpt NEW: Unix98 PTY
4117 host2netname NEW: Secure RPC
4119 iconv_close NEW: iconv
4120 iconv_open NEW: iconv
4121 if_freenameindex NEW: IPv6
4122 if_indextoname NEW: IPv6
4123 if_nameindex NEW: IPv6
4124 if_nametoindex NEW: IPv6
4125 in6addr_any NEW: IPv6
4126 in6addr_loopback NEW: IPv6
4127 inet6_isipv4mapped NEW: IPv6
4128 isastream NEW: STREAMS
4129 iswblank NEW: GNU ext.
4130 key_decryptsession NEW: Secure RPC
4131 key_decryptsession_pk NEW: Secure RPC
4132 key_encryptsession NEW: Secure RPC
4133 key_encryptsession_pk NEW: Secure RPC
4134 key_gendes NEW: Secure RPC
4135 key_get_conv NEW: Secure RPC
4136 key_secretkey_is_set NEW: Secure RPC
4137 key_setnet NEW: Secure RPC
4138 key_setsecret NEW: Secure RPC
4139 llrint NEW: ISO C 9x
4140 llrintf NEW: ISO C 9x
4141 llrintl NEW: ISO C 9x
4142 llround NEW: ISO C 9x
4143 llroundf NEW: ISO C 9x
4144 llroundl NEW: ISO C 9x
4149 lrintf NEW: ISO C 9x
4150 lrintl NEW: ISO C 9x
4151 lround NEW: ISO C 9x
4152 lroundf NEW: ISO C 9x
4153 lroundl NEW: ISO C 9x
4155 makecontext NEW: Unix98
4156 mempcpy NEW: GNU ext.
4159 modify_ldt NEW: kernel
4163 nearbyint NEW: ISO C 9x
4164 nearbyintf NEW: ISO C 9x
4165 nearbyintl NEW: ISO C 9x
4166 netname2host NEW: Secure RPC
4167 netname2user NEW: Secure RPC
4168 nexttoward NEW: ISO C 9x
4169 nexttowardf NEW: ISO C 9x
4170 nexttowardl NEW: ISO C 9x
4174 passwd2des NEW: Secure RPC
4176 pow10f NEW: GNU ext.
4177 pow10l NEW: GNU ext.
4180 printf_size NEW: GNU ext.
4181 printf_size_info NEW: GNU ext.
4182 profil_counter REMOVED
4183 pthread_mutexattr_getkind_np REPLACED
4184 pthread_mutexattr_setkind_np REPLACED
4185 ptsname NEW: Unix98 PTY
4186 ptsname_r NEW: Unix98 PTY
4188 putchar_locked REMOVED
4189 putgrent NEW: GNU ext.
4191 putpmsg NEW: STREAMS
4192 pututxline NEW: Unix98
4196 readdir64_r NEW: LFS
4197 remquo NEW: ISO C 9x
4198 remquof NEW: ISO C 9x
4199 remquol NEW: ISO C 9x
4201 roundf NEW: ISO C 9x
4202 roundl NEW: ISO C 9x
4204 scalbln NEW: ISO C 9x
4205 scalblnf NEW: ISO C 9x
4206 scalblnl NEW: ISO C 9x
4208 sendfile NEW: kernel
4209 setcontext NEW: Unix98
4210 setrlimit64 NEW: LFS
4211 setutxent NEW: Unix98
4213 sigignore NEW: Unix98
4214 sigqueue NEW: POSIX.1b
4215 sigrelse NEW: Unix98
4216 sigset NEW: POSIX.1b
4217 sigtimedwait NEW: POSIX.1b
4218 sigwaitinfo NEW: POSIX.1b
4219 sincos NEW: GNU ext.
4220 sincosf NEW: GNU ext.
4221 sincosl NEW: GNU ext.
4225 strcasestr NEW: GNU ext.
4226 strtoimax NEW: ISO C 9x
4227 strtoumax NEW: ISO C 9x
4228 strverscmp NEW: GNU ext.
4229 svcauthdes_stats NEW: Secure RPC
4230 svcunix_create NEW: sunrpc etx
4231 svcunixfd_create NEW: sunrpc ext
4232 swapcontext NEW: Unix98
4233 tcgetsid NEW: Unix98 PTY
4234 tdestroy NEW: GNU ext.
4235 tgamma NEW: ISO C 9x
4236 tgammaf NEW: ISO C 9x
4237 tgammal NEW: ISO C 9x
4241 truncf NEW: ISO C 9x
4242 truncl NEW: ISO C 9x
4244 unlockpt NEW: Unix98 PTY
4245 updwtmpx NEW: Unix98
4246 user2netname NEW: Secure RPC
4247 utmpxname NEW: Unix98
4248 versionsort NEW: GNU ext.
4249 versionsort64 NEW: GNU ext.
4251 wcscasecmp NEW: GNU ext.
4252 wcsncasecmp NEW: GNU ext.
4253 wcsnlen NEW: GNU ext.
4254 wcstoimax NEW: ISO C 9x
4255 wcstoll NEW: ISO C 9x
4256 wcstoull NEW: ISO C 9x
4257 wcstoumax NEW: ISO C 9x
4259 wordexp NEW: POSIX.2
4260 wordfree NEW: POSIX.2
4261 write_profiling REMOVED
4262 xdecrypt NEW: Secure RPC
4263 xdr_authdes_cred NEW: Secure RPC
4264 xdr_authdes_verf NEW: Secure RPC
4265 xdr_cryptkeyarg NEW: Secure RPC
4266 xdr_cryptkeyarg2 NEW: Secure RPC
4267 xdr_cryptkeyres NEW: Secure RPC
4268 xdr_getcredres NEW: Secure RPC
4269 xdr_key_netstarg NEW: Secure RPC
4270 xdr_key_netstres NEW: Secure RPC
4271 xdr_keybuf NEW: Secure RPC
4272 xdr_keystatus NEW: Secure RPC
4273 xdr_netnamestr NEW: Secure RPC
4274 xdr_sizeof NEW: Secure RPC
4275 xdr_unixcred NEW: sunrpc ext
4276 xencrypt NEW: Secure RPC
4277 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4288 * inet_ntoa is thread-safe
4290 * updwtmp is moved from libutil to libc
4292 * rewrite of cbrt function
4294 * update of timezone data
4308 * add atoll function
4310 * fix complex problems in Berkeley DB code
4312 * fix math functions
4316 * fixed lots of header problems (especially Linux/GNU specific)
4318 * dynamic loader preserves all registers
4320 * Roland McGrath provided support for handling of auxiliary objects in
4321 the ELF dynamic loader.
4323 * support for parallel builds is improved
4327 * GNU extensions are no longer declared by default. To enable them you
4328 must define the macro `_GNU_SOURCE' in your program or compile with
4331 * The library has changed from using GNU ld symbol aliases to using weak
4332 symbols where available. The ELF object file format supports weak
4333 symbols; GNU ld also supports weak symbols in the a.out format. (There
4334 is also now support for other GNU ld extensions in ELF. Use the
4335 `--with-elf' option to configure to indicate you have ELF, and
4336 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4337 of many files which contained only symbol aliases, reducing the size of
4338 the source and the compiled library; many other files were renamed to
4339 less cryptic names previously occupied by the symbol alias files.
4340 There is a new header file <elf.h> for programs which operate on
4341 files in the ELF format.
4343 * Converted to Autoconf version 2, so `configure' has more options.
4344 Run `configure --help' to see the details.
4346 * The library can now be configured to build profiling, highly-optimized
4347 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4348 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4349 `configure' enable building these extra libraries. The shared library is
4350 built by default when using both ELF and GNU ld. When shared libraries
4351 are enabled, the new library `-ldl' is available for arbitrary run-time
4352 loading of shared objects; its interface is defined in <dlfcn.h>. The
4353 new header file <link.h> gives access to the internals of the run-time
4354 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4355 application of same name on other systems and it provides information
4356 about dynamically linked binaries.
4358 * The C library now provides the run-time support code for profiling
4359 executables compiled with `-pg'. Programs can control the profiling code
4360 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4361 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4362 the support for this file format was contributed by David Mosberger-Tang.
4364 * The math code has been replaced with a math library based on fdlibm from
4365 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4366 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
4367 functions. The math functions now reside in a separate library, so
4368 programs using them will need to use `-lm' their linking commands.
4370 * John C. Bowman contributed optimized ix87 assembler inline functions.
4372 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
4373 mechanism similar to that found in Solaris 2. This is now used for the
4374 group, passwd, hosts, networks, services, protocols, rpc, ethers,
4375 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
4376 file controls what services are used for each individual database. This
4377 works by loading shared libraries with names specified in `nsswitch.conf',
4378 so service modules can be changed or added at any time without even
4379 relinking any program. Currently there are the file, db, and NIS based
4380 NSS services available.
4382 * The new functions `strtoq' and `strtouq' parse integer values from
4383 strings, like `strtol' and `strtoul', but they return `long long int' and
4384 `unsigned long long int' values, respectively (64-bit quantities).
4386 * The new functions `strtof' and `strtold' parse floating-point values from
4387 strings, like `strtod', but they return `float' and `long double' values,
4388 respectively (on some machines `double' and `long double' are the same).
4390 * Ulrich Drepper has contributed new implementations of the floating-point
4391 printing and reading code used in the `printf' family of functions and
4392 `strtod', `strtof', and `strtold'. These new functions are perfectly
4393 accurate, and much faster than the old ones.
4395 * The implementation of the POSIX locale model was completely rewritten by
4396 Ulrich Drepper. This includes the new programs `localedef' and `locale'
4397 to compile the POSIX locale definition.
4399 * The former dummy implementations of the strcoll and strxfrm function are
4400 now replaced by fully functional code contributed by Ulrich Drepper. The
4401 collation information comes from the POSIX locale definitions.
4403 * The new header <langinfo.h> defines an interface for accessing
4404 various locale-dependent data (using the locale chosen with `setlocale').
4406 * Ulrich Drepper has contributed a new suite of functions for operation on
4407 wide-character and multibyte-character strings, in <wchar.h>;
4408 and classification and case conversion of wide characters, in <wctype.h>.
4409 These new functions are conforming to the ISO C, Amendement 1 specification.
4411 * There is now a second implementation of the standard I/O library available.
4412 It comes from GNU libg++ as was written by Per Bothner, heavily modified
4413 by Hongjiu Lu and made thread safe by Ulrich Drepper.
4415 * You can now use positional parameter specifications in format strings
4416 for the `printf' and `scanf' families of functions. For example,
4417 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
4418 ``Number 6, Mr Jones''. This is mainly useful when providing different
4419 format strings for different languages, whose grammars may dictate
4420 different orderings of the values being printed. To support this
4421 feature, the interface for `register_printf_handler' has changed; see
4422 the header file <printf.h> for details.
4424 * The `printf' and `scanf' families of functions now understand a new
4425 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
4426 to group numbers as indicated by the locale; for `scanf' and friends, this
4427 says to accept as valid only a number with all the proper grouping
4428 separators in the right places. In the default "C" locale, numbers are
4429 not grouped; but locales for specific countries will define the usual
4430 conventions (i.e. separate thousands with `,' in the US locale).
4432 * The pgrp functions have been regularized, slightly incompatibly but much
4433 less confusingly. The core functions are now `getpgid' and `setpgid',
4434 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
4435 argument) and BSD `setpgrp' (identical to `setpgid') functions are
4436 provided for compatibility. There is no longer an incompatible `getpgrp'
4437 with an argument declared under _BSD_SOURCE; no BSD code uses it.
4439 * The new header file <fts.h> and suite of functions simplify programs that
4440 operate on directory trees. This code comes from 4.4 BSD.
4442 * The resolver code has been updated from the BIND 4.9.5-P1 release.
4443 Parts of the code were heavily modified by Ulrich Drepper to fit in the
4444 NSS scheme used in glibc.
4446 * There is a new malloc debugging hook `__memalign_hook'.
4448 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
4449 `unsigned int' in <sys/types.h>. These are for compatibility only and
4450 their use is discouraged.
4452 * The `-lmcheck' library to enable standard malloc debugging hooks is now
4453 done differently, so that it works even without GNU ld.
4455 * New function `euidaccess' checks allowed access to a file like `access',
4456 but using the effective IDs instead of the real IDs.
4458 * The time zone data files have been updated for the latest and greatest
4459 local time conventions of the countries of the world.
4461 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
4464 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
4465 for formatting floating-point numbers. They are provided only for
4466 compatibility; new programs should use `sprintf' instead. There are
4467 also equivalent function for the `long double' floating-point type and
4468 all functions also exist in a reentrant form.
4470 * The new auxiliary library `-lutil' from 4.4 BSD contains various
4471 functions for maintaining the login-record files (primarily of use to
4472 system programs such as `login'), and convenient functions for
4473 allocating and initializing a pseudo-terminal (pty) device.
4475 * Ulrich Drepper has contributed new support for System V style
4476 shared memory and IPC on systems that support it.
4478 * Ulrich Drepper has contributed several miscellaneous new functions found
4479 in System V: The `hsearch' family of functions provide an effective
4480 implementation of hash tables; `a64l' and `l64a' provide a very simple
4481 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
4484 * Ulrich Drepper has contributed new reentrant counterparts for the
4485 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
4487 * Ulrich Drepper has contributed new, highly-optimized versions of several
4488 string functions for the i486/Pentium family of processors.
4490 * Ulrich Drepper has updated the Linux-specific code, based largely
4491 on work done in Hongjiu Lu's version of GNU libc for Linux.
4492 The GNU library now supports Linux versions 2.0.10 and later,
4493 using the ELF object file format (i[3456]86-*-linux).
4495 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
4497 * David Mosberger-Tang and Richard Henderson have ported the C library
4498 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
4499 dynamic linking support for ELF/Alpha.
4501 * Richard Henderson contributed several Alpha optimized assembler function
4502 for arithmetic and string handling.
4504 * Ulrich Drepper has contributed a new set of message catalog functions to
4505 support multiple languages using the <libintl.h> interface, for use with
4506 his new package GNU gettext. Translation volunteers have contributed
4507 catalogs of the library's messages in Spanish, German, and Korean.
4509 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
4510 program and the `catgets' function for reading the catalog files it
4511 creates. (The <libintl.h> interface is preferred; we include the
4512 <nl_types.h> interface using `catgets' only for source compatibility with
4513 programs already written to use it.)
4515 * New header file <values.h> gives SVID-compatible names for <limits.h>
4518 * Various new macros, declarations, and small header files for compatibility
4521 * New function `group_member' is a convenient way to check if a process has
4522 a given effective group ID.
4524 * When using GCC 2.7 and later, the socket functions are now declared in a
4525 special way so that passing an argument of type `struct sockaddr_in *',
4526 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
4527 `struct sockaddr *' type, does not generate a type-clash warning.
4529 * New function `error' declared in header file <error.h> is a convenient
4530 function for printing error messages and optionally exiting; this is the
4531 canonical function used in GNU programs. The new functions `err', `warn',
4532 and friends in header file <err.h> are the canonical 4.4 BSD interface for
4533 doing the same thing.
4535 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
4536 POSIX.2 `glob' function to do ~ and {...} expansion.
4538 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
4539 `clearenv' which is used in POSIX.9 is also available.
4541 * New function `getsid' returns session ID number on systems that support it.
4543 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
4544 files <db.h> and <mpool.h> provide a rich set of functions for several
4545 types of simple databases stored in memory and in files, and <ndbm.h> is
4546 an old `ndbm'-compatible interface using the `db' functions. Link with
4547 `-ldb' to get these functions.
4549 * New macro `strdupa' copies a string like `strdup', but uses local stack
4550 space from `alloca' instead of dynamic heap space from `malloc'.
4552 * New function `strnlen' is like `strlen' but searches only a given maximum
4553 number of characters for the null terminator. `stpncpy', `strndup' and
4554 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
4557 * New function `statfs' in header <sys/statfs.h>.
4559 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
4560 provide convenient functions for operating on blocks of null-terminated
4563 * A new suite of functions in <utmp.h> handle all the details of reading
4564 and writing the utmp file.
4566 * An implementation of the NIS/YP(tm) based NSS service was contributed by
4569 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
4570 completely POSIX compliant and also implemented the extended functionality
4571 to handle alternate digit representation and alternate era date formats.
4573 * Ulrich Drepper provided an implementation of the `strptime' function
4574 defined in XPG4.2 which transforms a string into a `struct tm' value.
4576 * Paul Eggert provided the tzselect shell script as part of the timezone
4577 code. The shell script makes it easy to select the correct timezone
4580 * The implementation of the malloc family of functions is completely replaced
4581 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
4582 The implementation uses the mmap function (if available) and it is
4583 optimized for the use in multi threaded programs.
4585 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
4586 functions. This new functionality is usable by specifying a special
4587 salt string and it is compatible with implementation on *BSD systems.
4589 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
4590 `getsubopt' to handle second level command line options, `bsd_signal'
4591 to access BSD style `signal' functionality, the obsolete `regexp' style
4594 * the `lchown' function is available on system which support this
4597 * The implementation of the shadow password handling function was contributed
4600 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
4602 * POSIX.1g support was added. The <sys/select.h> header is available,
4603 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
4604 implementation of `getaddrinfo'.
4608 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
4610 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
4611 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
4613 * The new function `daemon' from 4.4 BSD is useful for server programs that
4614 want to put themselves in the background.
4616 * Joel Sherrill has contributed support for several standalone boards that
4617 run without an operating system.
4619 * `printf', `scanf' and friends now accept a `q' type modifier for long
4620 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
4622 * All of the code taken from BSD (notably most of the math and networking
4623 routines) has been updated from the BSD 4.4-Lite release.
4625 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
4627 * The new functions `getdomainname' and `setdomainname' fetch or change the
4628 YP/NIS domain name. These are system calls which exist on systems which
4631 * The time zone data files have been updated for the latest international
4634 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
4635 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
4639 * The C library now includes support for Sun RPC, from Sun's free
4640 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
4641 are included. (There is still no support for YP.)
4643 * Tom Quinn has contributed a port of the C library to SGI machines running
4644 Irix 4 (mips-sgi-irix4).
4646 * The new `lockf' function is a simplified interface to the locking
4647 facilities of `fcntl', included for compatibility.
4649 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
4651 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
4653 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
4656 * The error message printed by `assert' for a failed assertion now includes
4657 the name of the program (if using GNU ld) and the name of the calling
4658 function (with versions of GCC that support this).
4660 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
4662 * The library now includes the <sys/mman.h> header file and memory
4663 management functions `mmap', `munmap', `mprotect', `msync', and
4664 `madvise', on systems that support those facilities.
4666 * The interface for `mcheck' has changed slightly: the function called to
4667 abort the program when an allocation inconsistency is detected now takes
4668 an argument that indicates the type of failure. The new function
4669 `mprobe' lets you request a consistency check for a particular block at
4670 any time (checks are normally done only when you call `free' or `realloc'
4673 * It is now possible to easily cross-compile the C library, building on one
4674 system a library to run on another machine and/or operating system. All
4675 you need to do is set the variable `HOST_CC' in `configparms' to the
4676 native compiler for programs to run on the machine you are building on (a
4677 few generator programs are used on Unix systems); set `CC' to the
4680 * The new function `fexecve' (only implemented on the GNU system) executes
4681 a program file given a file descriptor already open on the file.
4685 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4686 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4688 * You can set the variable `libprefix' in `configparms' to specify a prefix
4689 to be prepended to installed library files; this makes it easy to install
4690 the GNU C library to be linked as `-lgnuc' or whatever.
4692 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4693 copies a limited number of characters from a string, and returns the
4694 address of the last character written.
4696 * You no longer need to check for whether the installed `stddef.h' is
4697 compatible with the GNU C library. configure now checks for you.
4699 * You can now define a per-stream `fileno' function to convert the
4700 stream's cookie into an integral file descriptor.
4702 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4703 allocates zero bytes of storage, and returns a unique pointer which
4704 you can pass to `realloc' or `free'. The behavior is undefined if
4705 you dereference this pointer.
4707 * The C library now runs on Sony NEWS m68k machines running either
4708 NewsOS 3 or NewsOS 4.
4710 * The new `syscall' function is a system-dependent primitive function
4711 for invoking system calls. It has the canonical behavior on Unix
4712 systems, including unreliable return values for some calls (such as
4713 `pipe', `fork' and `getppid').
4715 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4716 to `EAGAIN', which is the preferred name. On systems whose kernels
4717 use two distinct codes, the C library now translates EWOULDBLOCK to
4718 EAGAIN in every system call function.
4722 * The GNU C Library Reference Manual is now distributed with the library.
4723 `make dvi' will produce a DVI file of the printed manual.
4724 `make info' will produce Info files that you can read on line using C-h i
4725 in Emacs or the `info' program.
4726 Please send comments on the manual to bug-glibc-manual@gnu.org.
4728 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4730 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4732 * Jason Merrill has contributed a port to the Sequent Symmetry running
4733 Dynix version 3 (i386-sequent-dynix).
4735 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4736 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4738 * New function `memory_warnings' lets you arrange to get warnings when
4739 malloc is running out of memory to allocate, like Emacs gives you.
4741 * The C library now contains the relocating allocator used in Emacs 19 for
4742 its editing buffers. This allocator (ralloc) minimizes allocation
4743 overhead and fragmentation by moving allocated regions around whenever it
4744 needs to. You always refer to a ralloc'd region with a "handle" (a
4745 pointer to a pointer--an object of type `void **').
4747 * There is a new `printf' format: `%m' gives you the string corresponding
4748 to the error code in `errno'.
4750 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4751 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4752 pass, the `a' modifier says to fill in a `char **' you pass with a
4755 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4756 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4757 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4759 * `mkstemp' is a traditional Unix function to atomically create and open a
4760 uniquely-named temporary file.
4764 * The standard location for the file that says what the local timezone is
4765 has changed again. It is now `/usr/local/etc/localtime' (or more
4766 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4768 * The distribution no longer contains any files with names longer than 14
4771 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4772 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4774 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4778 * The configuration process has changed quite a bit. The `configure'
4779 script is now used just like the configuration scripts for other GNU
4780 packages. The `sysdeps' directory hierarchy is much rearranged.
4781 The file `INSTALL' explains the new scheme in detail.
4783 * The header files no longer need to be processed into ANSI C and
4784 traditional C versions. There is just one set of files to install, and
4785 it will work with ANSI or old C compilers (including `gcc -traditional').
4787 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4788 MIPS DECStation running Ultrix 4.
4790 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4791 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4792 made itself into a shared library.
4794 * Yet further improved support for the i386, running 4.3 BSD-like systems
4795 (such as Mach 3 with the Unix single-server), or System V.
4797 * New function `strncasecmp' to do case-insensitive string comparison
4798 with limited length.
4800 * New function `strsep' is a reentrant alternative to `strtok'.
4802 * New functions `scandir' and `alphasort' for searching directories.
4804 * New function `setenv' is a better interface to `putenv'.
4806 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4807 function for traversing a directory tree.
4809 * The GNU obstack package is now also part of the C library.
4810 The new function `open_obstack_stream' creates a stdio stream that
4811 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4812 formatted output directly to an obstack.
4814 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4815 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4817 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4819 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4820 things to your strings.
4822 * There are some new test programs: test-fseek, testmb, and testrand.
4824 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4825 These ports are not finished, but are a good starting place for really
4826 supporting those systems.
4828 * `/etc/localtime' is now the standard location for the file that says what
4829 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4830 This follows the general principle that `/etc' is the place for all local
4831 configuration files.
4833 * The C library header files now use `extern "C"' when used by the C++
4834 compiler, so the C library should now work with C++ code.
4836 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4837 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4840 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4841 function which uses the `merge sort' algorithm, and is said to be
4842 significantly faster than the old GNU `qsort' function. Merge sort is
4843 now the standard `qsort' function. The new algorithm can require a lot
4844 of temporary storage; so, the old sorting function is called when the
4845 required storage is not available.
4847 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4848 provides the Unix `crypt' function, plus some other entry points.
4850 * The code and header files taken from 4.4 BSD have been updated with the
4851 latest files released from Berkeley.
4853 ----------------------------------------------------------------------
4854 Copyright information:
4856 Copyright (C) 1992-2018 Free Software Foundation, Inc.
4858 Permission is granted to anyone to make or distribute verbatim copies
4859 of this document as received, in any medium, provided that the
4860 copyright notice and this permission notice are preserved,
4861 thus giving the recipient permission to redistribute in turn.
4863 Permission is granted to distribute modified versions
4864 of this document, or of portions of it,
4865 under the above conditions, provided also that they
4866 carry prominent notices stating who last changed them.
4869 version-control: never