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 * The GNU C Library can now be compiled with support for Intel CET, AKA
13 Intel Control-flow Enforcement Technology. When the library is built
14 with --enable-cet, the resulting glibc is protected with indirect
15 branch tracking (IBT) and shadow stack (SHSTK). CET-enabled glibc is
16 compatible with all existing executables and shared libraries. This
17 feature is currently supported on i386, x86_64 and x32 with GCC 8 and
18 binutils 2.29 or later. Note that CET-enabled glibc requires CPUs
19 capable of multi-byte NOPs, like x86-64 processors as well as Intel
20 Pentium Pro or newer. NOTE: --enable-cet has been tested for i686,
21 x86_64 and x32 on non-CET processors. --enable-cet has been tested
22 for x86_64 and x32 on CET SDVs, but Intel CET support hasn't been
25 * The GNU C Library now has correct support for ABSOLUTE symbols
26 (SHN_ABS-relative symbols). Previously such ABSOLUTE symbols were
27 relocated incorrectly or in some cases discarded. The GNU linker can
28 make use of the newer semantics, but it must communicate it to the
29 dynamic loader by setting the ELF file's identification (EI_ABIVERSION
30 field) to indicate such support is required.
32 * Unicode 11.0.0 Support: Character encoding, character type info, and
33 transliteration tables are all updated to Unicode 11.0.0, using
34 generator scripts contributed by Mike FABIAN (Red Hat).
36 * <math.h> functions that round their results to a narrower type are added
37 from TS 18661-1:2014 and TS 18661-3:2015:
39 - fadd, faddl, daddl and corresponding fMaddfN, fMaddfNx, fMxaddfN and
42 - fsub, fsubl, dsubl and corresponding fMsubfN, fMsubfNx, fMxsubfN and
45 - fmul, fmull, dmull and corresponding fMmulfN, fMmulfNx, fMxmulfN and
48 - fdiv, fdivl, ddivl and corresponding fMdivfN, fMdivfNx, fMxdivfN and
51 * Nominative and genitive month names are now supported for the following
52 languages: Armenian, Asturian, Catalan, Czech, Kashubian, Occitan, Ossetian,
53 Scottish Gaelic, Upper Sorbian, and Walloon. The following languages now
54 support abbreviated alternative month names: Catalan, Greek, and Kashubian.
56 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
57 include the support of the nominative and genitive month names.
59 * Building and running on GNU/Hurd systems now works without out-of-tree
62 * The renameat2 function has been added, a variant of the renameat function
63 which has a flags argument. If the flags are zero, the renameat2 function
64 acts like renameat. If the flag is not zero and there is no kernel
65 support for renameat2, the function will fail with an errno value of
66 EINVAL. This is different from the existing gnulib function renameatu,
67 which performs a plain rename operation in case of a RENAME_NOREPLACE
68 flags and a non-existing destination (and therefore has a race condition
69 that can clobber the destination inadvertently).
71 * The statx function has been added, a variant of the fstatat64
72 function with an additional flags argument. If there is no direct
73 kernel support for statx, glibc provides basic stat support based on
74 the fstatat64 function.
76 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
77 library if installed. libidn2 version 2.0.5 or later is recommended. If
78 libidn2 is not available, internationalized domain names are not encoded
79 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
80 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
81 with an encoding error.) Flags which used to change the IDN encoding and
82 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
83 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
84 deprecated. They no longer have any effect.
86 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
87 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
88 range of ELF gABI expressions including such constructs as
89 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
90 have been further restricted, and where in the past a dynamic string
91 token sequence may have been interpreted as a literal string it will
92 now cause a load failure. These load failures were always considered
93 unspecified behaviour from the perspective of the dynamic loader, and
94 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
95 results in a load failure now.
97 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
98 implementation includes all the standard functions provided by
101 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
102 thrd_detach, thrd_exit, and thrd_join for thread management.
104 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
105 mtx_destroy for mutual exclusion.
107 - call_once for function call synchronization.
109 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
110 cnd_wait for conditional variables.
112 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
114 Application developers must link against libpthread to use ISO C threads.
116 Deprecated and removed features, and other changes affecting compatibility:
118 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
119 installed. Software that was using either header should be updated to
120 use standard <stdio.h> interfaces instead.
122 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
123 This was never required by the C standard, and the macros just expanded
124 to call alternative names for the same functions. If you hoped getc and
125 putc would provide performance improvements over fgetc and fputc, instead
126 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
127 necessary, flockfile and funlockfile.
129 * All stdio functions now treat end-of-file as a sticky condition. If you
130 read from a file until EOF, and then the file is enlarged by another
131 process, you must call clearerr or another function with the same effect
132 (e.g. fseek, rewind) before you can read the additional data. This
133 corrects a longstanding C99 conformance bug. It is most likely to affect
134 programs that use stdio to read interactive input from a terminal.
137 * The macros 'major', 'minor', and 'makedev' are now only available from
138 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
139 headers that happen to include <sys/types.h>. These macros are rarely
140 used, not part of POSIX nor XSI, and their names frequently collide with
141 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
144 <sys/sysmacros.h> is a GNU extension. Portable programs that require
145 these macros should first include <sys/types.h>, and then include
146 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
148 * The tilegx*-*-linux-gnu configurations are no longer supported.
150 * The obsolete function ustat is no longer available to newly linked
151 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
152 function has been deprecated in favor of fstatfs and statfs.
154 * The obsolete function nfsservctl is no longer available to newly linked
155 binaries. This function was specific to systems using the Linux kernel
156 and could not usefully be used with the GNU C Library on systems with
157 version 3.1 or later of the Linux kernel.
159 * The obsolete function name llseek is no longer available to newly linked
160 binaries. This function was specific to systems using the Linux kernel
161 and was not declared in a header. Programs should use the lseek64 name
162 for this function instead.
164 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
165 getaddrinfo and getnameinfo functions have been deprecated. The behavior
166 previously selected by them is now always enabled.
168 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
169 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
170 restriction (rejecting '_' in host names, among other things) has been
171 removed, for increased compatibility with non-IDN name resolution.
173 * The fcntl function now have a Long File Support variant named fcntl64. It
174 is added to fix some Linux Open File Description (OFD) locks usage on non
175 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
176 fcntl and LFS support is handled transparently. Also for Linux, the OFD
177 locks act as a cancellation entrypoint.
179 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
180 ecb_crypt, and des_setparity are no longer available to newly linked
181 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
182 longer installed. These functions encrypted and decrypted data with the
183 DES block cipher, which is no longer considered secure. Software that
184 still uses these functions should switch to a modern cryptography library,
187 * Reflecting the removal of the encrypt and setkey functions above, the
188 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
189 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
192 * The obsolete function fcrypt is no longer available to newly linked
193 binaries. It was just another name for the standard function crypt,
194 and it has not appeared in any header file in many years.
196 * We have tentative plans to hand off maintenance of the passphrase-hashing
197 library, libcrypt, to a separate development project that will, we hope,
198 keep up better with new passphrase-hashing algorithms. We will continue
199 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
200 'crypt_r' should not need to change at all; however, distributions will
201 need to install <crypt.h> and libcrypt from a separate project.
203 In this release, if the configure option --disable-crypt is used, glibc
204 will not install <crypt.h> or libcrypt, making room for the separate
205 project's versions of these files. The plan is to make this the default
206 behavior in a future release.
208 Changes to build and runtime requirements:
210 GNU make 4.0 or later is now required to build glibc.
212 Security related changes:
214 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
215 been fixed by removing the glibc-internal IDNA implementation and using
216 the system-provided libidn2 library instead. Originally reported by Hanno
217 Böck and Christian Weisgerber.
219 CVE-2017-18269: An SSE2-based memmove implementation for the i386
220 architecture could corrupt memory. Reported by Max Horn.
222 CVE-2018-11236: Very long pathname arguments to realpath function could
223 result in an integer overflow and buffer overflow. Reported by Alexey
226 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
227 architecture could write beyond the target buffer, resulting in a buffer
228 overflow. Reported by Andreas Schwab.
230 The following bugs are resolved with this release:
232 [The release manager will add the list generated by
233 scripts/list-fixed-bugs.py just before the release.]
240 * The GNU C Library can now be compiled with support for building static
241 PIE executables (See --enable-static-pie in INSTALL). These static PIE
242 executables are like static executables but can be loaded at any address
243 and provide additional security hardening benefits at the cost of some
244 memory and performance. When the library is built with --enable-static-pie
245 the resulting libc.a is usable with GCC 8 and above to create static PIE
246 executables using the GCC option '-static-pie'. This feature is currently
247 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
248 aarch64 with binutils 2.30 or later.
250 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
251 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
254 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
256 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
258 * In order to support faster and safer process termination the malloc API
259 family of functions will no longer print a failure address and stack
260 backtrace after detecting heap corruption. The goal is to minimize the
261 amount of work done after corruption is detected and to avoid potential
262 security issues in continued process execution. Reducing shutdown time
263 leads to lower overall process restart latency, so there is benefit both
264 from a security and performance perspective.
266 * The abort function terminates the process immediately, without flushing
267 stdio streams. Previous glibc versions used to flush streams, resulting
268 in deadlocks and further data corruption. This change also affects
269 process aborts as the result of assertion failures.
271 * On platforms where long double has the IEEE binary128 format (aarch64,
272 alpha, mips64, riscv, s390 and sparc), the math library now implements
273 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
274 These are the same interfaces added in version 2.26 for some platforms where
275 this format is supported but is not the format of long double.
277 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
278 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
279 implements interfaces for that type, as defined by ISO/IEC TS
280 18661-3:2015. These are corresponding interfaces to those supported for
283 * The math library now implements interfaces for the _Float32, _Float64 and
284 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
285 corresponding interfaces to those supported for _Float128.
287 * glibc now implements the memfd_create and mlock2 functions on Linux.
289 * Support for memory protection keys was added. The <sys/mman.h> header now
290 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
293 * The copy_file_range function was added.
295 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
297 * The ldconfig utility now processes `include' directives using the C/POSIX
298 collation ordering. Previous glibc versions used locale-specific
299 ordering, the change might break systems that relied on that.
301 * Support for two grammatical forms of month names has been added.
302 In a call to strftime, the "%B" and "%b" format specifiers will now
303 produce the grammatical form required when the month is used as part
304 of a complete date. New "%OB" and "%Ob" specifiers produce the form
305 required when the month is named by itself. For instance, in Greek
306 and in many Slavic and Baltic languages, "%B" will produce the month
307 in genitive case, and "%OB" will produce the month in nominative case.
309 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
310 are all valid and will all accept any known form of month
311 name---standalone or complete, abbreviated or full. In a call to
312 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
313 the strings used by "%B" and "%b", respectively. New query
314 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
315 used by "%OB" and "%Ob", respectively.
317 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
318 define the strings for %OB and %Ob, respectively; these have the
319 same syntax as "mon" and "abmon". These arrays are optional; if they
320 are not provided then they have the same content as "mon" and "abmon",
323 These features are provided for locales which define "alt_mon" and/or
324 "ab_alt_mon" in their locale source data. This release includes such
325 alternative month name data for the following languages: Belarusian,
326 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
328 This feature is currently a GNU extension, but it is expected to
329 be added to the next revision of POSIX, and it is also already
330 available on some BSD-derived operating systems.
332 This feature will cause existing statically compiled applications
333 to fail to load locales and fall back to the builtin C/POSIX locales.
334 See notes below for other changes affecting compatibility.
336 * Support for the RISC-V ISA running on Linux has been added. This port
337 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
338 for the following ISA and ABI pairs:
344 Deprecated and removed features, and other changes affecting compatibility:
346 * Statically compiled applications attempting to load locales compiled for the
347 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
348 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
349 support for two grammatical forms of the month names, also extends the locale
350 data binary format. Static applications needing locale support must be
351 recompiled to match the runtime and data they are deployed with. In some
352 distributions there is an upgrade window where dynamically linked applications
353 may use a new library but the old locale data and also fall back to the
354 builtin C/POSIX locales; restarting the application process is sufficient to
357 * Support for statically linked applications which call dlopen is deprecated
358 and will be removed in a future version of glibc. Applications which call
359 dlopen need to be linked dynamically instead.
361 * Support for old programs which use internal stdio data structures and
362 functions is deprecated. This includes programs which use the C++ streams
363 provided by libstdc++ in GCC 2.95. Programs which use the internal
364 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
365 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
366 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
367 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
368 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
369 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
370 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
371 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
372 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
373 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
374 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
375 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
376 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
377 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
378 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
379 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
380 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
381 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
382 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
383 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
384 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
385 future version of glibc. Unlike other symbol removals, these old
386 applications will not be supported using compatibility symbols.
388 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
389 defined by <sys/ptrace.h>.
391 * libm no longer supports SVID error handling (calling a user-provided
392 matherr function on error) or the _LIB_VERSION variable to control error
393 handling. (SVID error handling and the _LIB_VERSION variable still work
394 for binaries linked against older versions of the GNU C Library.) The
395 libieee.a library is no longer provided. math.h no longer defines struct
396 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
397 TLOSS, PLOSS and HUGE.
399 * The libm functions pow10, pow10f and pow10l are no longer supported for
400 new programs. Programs should use the standard names exp10, exp10f and
401 exp10l for these functions instead.
403 * The mcontext_t type is no longer the same as struct sigcontext. On
404 platforms where it was previously the same, this changes the C++ name
405 mangling for interfaces involving this type.
407 * The add-ons mechanism for building additional packages at the same time as
408 glibc has been removed. The --enable-add-ons configure option is now
411 * The --without-fp configure option is now ignored. Whether hardware
412 floating-point instructions are used is now configured based on whether
413 the compiler used at configure time (without any options implied by a
414 --with-cpu= configure option) uses such instructions.
416 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
417 the specified string can be parsed as a domain name.
419 * In the malloc_info output, the <heap> element may contain another <aspace>
420 element, "subheaps", which contains the number of sub-heaps.
422 * The libresolv function p_secstodate is no longer supported for new
425 * The tilepro-*-linux-gnu configuration is no longer supported.
427 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
428 and will be removed in a future release. Software that is still using
429 either header should be updated to use standard <stdio.h> interfaces
432 libio.h was originally the header for a set of supported GNU extensions,
433 but they have not been maintained as such in many years, they are now
434 standing in the way of improvements to stdio, and we don't think there are
435 any remaining external users. _G_config.h was never intended for public
436 use, but predates the bits convention.
438 Changes to build and runtime requirements:
440 * bison version 2.7 or later is required to generate code in the 'intl'
443 Security related changes:
445 CVE-2009-5064: The ldd script would sometimes run the program under
446 examination directly, without preventing code execution through the
447 dynamic linker. (The glibc project disputes that this is a security
448 vulnerability; only trusted binaries must be examined using the ldd
451 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
452 suffered from a one-byte overflow during ~ operator processing (either
453 on the stack or the heap, depending on the length of the user name).
454 Reported by Tim Rühsen.
456 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
457 would sometimes fail to free memory allocated during ~ operator
458 processing, leading to a memory leak and, potentially, to a denial
461 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
462 without GLOB_NOESCAPE, could write past the end of a buffer while
463 unescaping user names. Reported by Tim Rühsen.
465 CVE-2017-17426: The malloc function, when called with an object size near
466 the value SIZE_MAX, would return a pointer to a buffer which is too small,
467 instead of NULL. This was a regression introduced with the new malloc
468 thread cache in glibc 2.26. Reported by Iain Buclaw.
470 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
471 to the allocation of too much memory. (This is not a security bug per se,
472 it is mentioned here only because of the CVE assignment.) Reported by
475 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
476 of the number of search path components. (This is not a security
477 vulnerability per se because no trust boundary is crossed if the fix for
478 CVE-2017-1000366 has been applied, but it is mentioned here only because
479 of the CVE assignment.) Reported by Qualys.
481 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
482 for AT_SECURE or SUID binaries could be used to load libraries from the
485 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
486 succeeds without returning an absolute path due to unexpected behaviour
487 of the Linux kernel getcwd syscall. Reported by halfdog.
489 CVE-2018-6485: The posix_memalign and memalign functions, when called with
490 an object size near the value of SIZE_MAX, would return a pointer to a
491 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
493 CVE-2018-6551: The malloc function, when called with an object size near
494 the value of SIZE_MAX, would return a pointer to a buffer which is too
495 small, instead of NULL.
497 The following bugs are resolved with this release:
499 [866] glob: glob should match dangling symlinks
500 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
501 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
503 [5997] math: Very slow execution of sinf function
504 [10580] localedata: hr_HR: updated locale
505 [10871] locale: 'mon' array should contain both nominative and genitive
507 [12349] localedata: eu_ES: incorrect thousands separator
508 [13605] localedata: shn_MM: new Shan locale
509 [13805] localedata: ru_RU: currency should use ',' as radix point
510 [13953] localedata: km_KH: locale update
511 [13994] localedata: mjw_IN: new locale
512 [14121] build: make writes .mo files in po directory
513 [14333] libc: Fix the race between atexit() and exit()
514 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
515 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
517 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
518 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
519 width Latin characters
520 [15332] localedata: es_CU: locale update
521 [15436] stdio: Don't close or flush stdio streams on abort
522 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
524 [16148] localedata: ca_ES: incorrect thousands separator
525 [16750] dynamic-link: ldd should not try to execute the binaries
527 [16777] localedata: pl_PL: incorrect thousands separator in locale
528 [16905] localedata: hanzi: new collation
529 [17563] localedata: cmn_TW: add hanzi collation
530 [17750] localedata: wrong collation order of diacritics in most locales
531 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
533 [17956] build: Build fails on missing definitions from header file
534 nss/nss.h when Mozilla NSS is used for cryptography
535 [18203] libc: realpath() does not handle unreachable paths correctly
536 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
537 [18812] localedata: kab_DZ: new Kabyle Algeria locale
538 [18822] libc: Internal functions are called via PLT
539 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
540 [19170] libc: __gmon_start__ defined in hppa in crtn.S
541 [19574] libc: glibc should support building static PIE binaries
542 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
544 [19971] glob: glob: Do not skip entries with zero d_ino values
545 [19982] localedata: fr.po: spelling mistake for error code EXDEV
546 [20008] localedata: km_KH: convert to translit_neutral
547 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
548 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
549 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
550 [20482] localedata: de_CH: abbreviated weekdays should be two letters
551 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
553 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
554 they're set, wrong errors returned by gaih_inet when lookup functions
556 [20756] localedata: [PATCH] Use Unicode wise thousands separator
557 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
559 [20952] localedata: yuw_PG: new locale
560 [21084] localedata: charmaps/IBM858: new codepage
561 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
562 [21242] libc: assert gives pedantic warning in old gcc versions
563 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
564 __regcall calling convention
565 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
566 [21326] libc: C99 functions are not declared for C++11 and later if
567 _GNU_SOURCE is not predefined by g++
568 [21457] libc: sys/ucontext.h namespace
569 [21530] libc: tmpfile() should be implemented using O_TMPFILE
570 [21660] math: GCC fails to compile a formula with tgmath.h
571 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
572 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
573 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
574 [21684] math: tgmath.h handling of complex integers
575 [21685] math: tgmath.h handling of bit-fields
576 [21686] math: tgmath.h handling of __int128
577 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
579 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
581 [21750] localedata: column width of characters incompatible with classical
583 [21754] malloc: malloc: Perform as little work as possible after heap
584 consistency check failures
585 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
586 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
587 [21791] string: Unused XXX_chk_XXX functions in libc.a
588 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
590 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
592 [21845] localedata: Added new Locale bho_NP
593 [21853] localedata: Fix abday Which looks same as day in zh_SG
594 [21854] localedata: Added New Locale en_SC
595 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
596 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
597 _dl_runtime_resolve_avx_slow
598 [21885] network: getaddrinfo: gethosts does not release resolver context
599 on memory allocation failure
600 [21899] libc: XPG4.2 sigaction namespace
601 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
603 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
605 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
606 errno value, causing getaddrinfo to fail
607 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
608 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
609 instead of EAI_NODATA
610 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
611 constant PTRACE_SEIZE_DEVEL
612 [21930] math: C-only gcc builtins used in <math.h> isinf
613 [21932] network: Unpaired __resolv_context_get in generic get*_r
615 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
616 [21944] libc: sigval namespace
617 [21951] localedata: Update hanzi collation by stroke
618 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
619 sysdeps/x86_64/fpu/e_expf.S
620 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
621 allocation in syscall loops)
622 [21959] localedata: Fix Country name for xh_ZA
623 [21960] localedata: Fix abmon for bem_ZM
624 [21966] math: AVX2 mathvec functions use FMA without checking
625 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
626 [21971] localedata: Added New Locale for mfe_MU
627 [21972] libc: assert macro requires operator== (int) for its argument type
628 [21973] math: [sparc] libm missing sqrtl compat symbol
629 [21974] libc: Remove __bb_init_func and __bb_exit_func
630 [21982] string: stratcliff.c: error: assuming signed overflow does not
632 [21986] stdio: __guess_grouping is called incorrectly
633 [21987] math: [sparc32] wrong bits/long-double.h installed
634 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
636 [22022] localedata: Missing country_name for mni_IN
637 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
639 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
641 [22026] locale: iconv_open: heap overflow on gconv_init failure
642 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
643 [22035] math: [m68k] bits/math-inline.h macro namespace
644 [22038] localedata: Fix abbreviated weeks and months for Somali
645 [22044] localedata: Remove redundant data for Limburgish Language
646 [22050] malloc: Linking with -lmcheck does not hook
647 __malloc_initialize_hook correctly
648 [22051] libc: zero terminator in the middle of glibc's .eh_frame
649 [22052] malloc: malloc failed to compile with GCC 7 and -O3
650 [22070] localedata: charmaps/UTF-8: wcwidth for
651 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
652 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
653 Jungseong and Jongseong) should be 0
654 [22078] nss: nss_files performance issue in multi mode
655 [22082] math: bits/math-finite.h exp10 condition
656 [22086] libc: pcprofiledump incorrect cross-endian condition
657 [22093] dynamic-link: ld.so no longer searches in .../x86_64
658 [22095] network: Name server address allocation memory leak in resolv.conf
660 [22096] network: __resolv_conf_attach can incorrectly free passed conf
662 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
663 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
665 [22111] malloc: malloc: per thread cache is not returned when thread exits
666 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
667 [22134] libc: [linux] implement fexecve with execveat
668 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
670 [22145] libc: ttyname() gives up too early in the face of namespaces
671 [22146] math: C++ build issue with float128 on x86_64
672 [22153] nptl: nptl: save error code before process termination
673 [22156] libc: [hppa,ia64,microblaze] Executable stack default
674 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
675 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
676 [22165] libc: [hppa] Text relocations in libc.so
677 [22180] libc: destructor registered via __cxa_atexit is called twice
678 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
679 symlinks") cause "make" segfaults
680 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
682 [22207] libc: FAIL: stdlib/test-atexit-race
683 [22225] math: nearbyint arithmetic moved before feholdexcept
684 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
685 [22235] math: iscanonical in C++ and float128
686 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
687 the svid compat wrapper
688 [22244] math: ynf and yn are wrong without the svid compat wrapper
689 [22273] libc: Improper assert in Linux posix_spawn implementation
690 [22284] libc: -pg -pie doesn't work
691 [22292] locale: localedef exits with error 4 when it should be error 1
692 [22294] locale: Allow "" for int_currency_symbol definition in locales.
693 [22295] locale: Don't warn on non-symbolic characters in locale sources in
695 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
696 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
698 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
699 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
700 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
701 [22322] libc: [mips64] wrong bits/long-double.h installed
702 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
703 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
705 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
706 [22343] malloc: Integer overflow in posix_memalign
707 [22347] libc: getrandom() returns the number of bytes that were copied to
708 the buffer even though the comments say "Return 0 on success and -1 on
710 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
711 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
713 [22370] dynamic-link: Incorrect note padding check
714 [22375] libc: malloc returns pointer from tcache_get when should return
715 NULL (CVE-2017-17426)
716 [22377] math: iseqsig, float128 and C++
717 [22382] localedata: Error in tpi_PG locale
718 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
719 inside the ASCII printable range
720 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
722 [22403] localedata: Slash needs escaping in some locales
723 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
724 [22409] network: res_hnok does not accept some host names used on the
726 [22412] network: res_dnok, res_hnok should perform syntax checks
727 [22413] network: ns_name_pton ignores syntactically invalid trailing
729 [22415] stdio: setvbuf can lead to invalid free/segfault
730 [22432] build: Non-deterministic build
731 [22439] malloc: malloc_info should compute summary statistics for all sub-
733 [22442] network: if_nametoindex could report index for the wrong
735 [22446] build: aliasing violation calling readlink in handle_request
736 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
737 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
738 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
739 __nscd_hash/__nss_hash
740 [22463] network: p_secstodate overflow handling
741 [22469] localedata: pl_PL LC_COLLATE does not use i18n
742 [22478] libc: sigwait can fail with EINTR
743 [22505] libc: ldconfig processes include directive in locale-specific
745 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
746 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
747 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
748 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
749 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
750 [22534] localedata: Collation rules for Serbian and Bosnian should be the
752 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
753 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
754 [22577] libc: missing newline after "cannot allocate TLS data structures
756 [22588] manual: manual/conf.texi: missing underscore in front of
758 [22593] math: nextafter and nexttoward are declared with const attribute
759 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
760 [22603] string: ia64 memchr overflows internal pointer check
761 [22605] libc: SH clone does not set the exit code correctly
762 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
764 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
765 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
766 modified in case of success
767 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
768 [22615] manual: manual: ambiguous wording about errno value in case of
770 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
772 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
773 binaries or if /proc is not mounted (CVE-2017-16997)
774 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
775 [22630] build: $(no-pie-ldflag) is no longer effective
776 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
777 [22635] nptl: pthread_self returns NULL before libpthread is loaded
778 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
779 [22637] nptl: guard size is subtracted from thread stack size instead of
781 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
782 [22657] localedata: hu_HU: Avoid double space in date
783 [22660] math: fmax, fmin sNaN handling on alpha
784 [22664] libc: New warning of GCC8
785 [22665] math: alpha: ceil and floor raise inexact exceptions
786 [22666] math: alpha: trunc raise inexact exceptions
787 [22667] libc: makecontext lacks stack alignment on i386
788 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
789 [22679] libc: getcwd(3) can succeed without returning an absolute path
791 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
793 [22687] math: [powerpc-nofpu] complex long double functions spurious
795 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
796 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
797 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
799 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
800 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
802 [22701] nis: Incomplete removal of libnsl
803 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
804 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
805 [22715] dynamic-link: FAIL: elf/tst-audit10
806 [22719] libc: Backtrace tests fail on hppa
807 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
808 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
809 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
810 before the first call to crypt_r () in crypt/badsalttest.c
817 * A per-thread cache has been added to malloc. Access to the cache requires
818 no locks and therefore significantly accelerates the fast path to allocate
819 and free small amounts of memory. Refilling an empty cache requires locking
820 the underlying arena. Performance measurements show significant gains in a
821 wide variety of user workloads. Workloads were captured using a special
822 instrumented malloc and analyzed with a malloc simulator. Contributed by
823 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
825 * Unicode 10.0.0 Support: Character encoding, character type info, and
826 transliteration tables are all updated to Unicode 10.0.0, using
827 generator scripts contributed by Mike FABIAN (Red Hat).
828 These updates cause user visible changes, especially the changes in
829 wcwidth for many emoji characters cause problems when emoji sequences
830 are rendered with pango, see for example:
831 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
833 * Collation of Hungarian has been overhauled and is now consistent with "The
834 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
837 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
839 - The GNU C Library will now detect when /etc/resolv.conf has been
840 modified and reload the changed configuration. The new resolver option
841 “no-reload” (RES_NORELOAD) disables this behavior.
843 - The GNU C Library now supports an arbitrary number of search domains
844 (configured using the “search” directive in /etc/resolv.conf);
845 previously, there was a hard limit of six domains. For backward
846 compatibility, applications that directly modify the ‘_res’ global
847 object are still limited to six search domains.
849 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
850 Library will now randomly pick a name server from the configuration as a
851 starting point. (Previously, the second name server was always used.)
853 * The tunables feature is now enabled by default. This allows users to tweak
854 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
856 * New function reallocarray, which resizes an allocated block (like realloc)
857 to the product of two sizes, with a guaranteed clean failure upon integer
858 overflow in the multiplication. Originally from OpenBSD, contributed by
859 Dennis Wölfing and Rüdiger Sonderfeld.
861 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
862 These are extended versions of preadv and pwritev, respectively, taking an
863 additional flags argument. The set of supported flags depends on the
864 running kernel; full support currently requires kernel 4.7 or later.
866 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
867 create a new session ID for the spawned process. This feature is
868 scheduled to be added to the next major revision of POSIX; for the time
869 being, it is available under _GNU_SOURCE.
871 * errno.h is now safe to use from C-preprocessed assembly language on all
872 supported operating systems. In this context, it will only define the
873 Exxxx constants, as preprocessor macros expanding to integer literals.
875 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
876 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
877 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
878 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
880 To compile programs that use this feature, the compiler must support
881 128-bit floating point with the type name _Float128 (as defined by TS
882 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
883 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
884 must be defined to make the new interfaces visible.
886 The new functions and macros correspond to those present for other
887 floating-point types (except for a few obsolescent interfaces not
888 supported for the new type), with F128 or f128 suffixes; for example,
889 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
890 printf or scanf formats for the new type; the strfromf128 and strtof128
891 interfaces should be used instead.
893 Deprecated and removed features, and other changes affecting compatibility:
895 * The synchronization that pthread_spin_unlock performs has been changed to
896 now be equivalent to a C11 atomic store with release memory order to the
897 spin lock's memory location. Previously, several (but not all)
898 architectures used stronger synchronization (e.g., containing what is
899 often called a full barrier). This change can improve performance, but
900 may affect odd fringe uses of spin locks that depend on the previous
901 behavior (e.g., using spin locks as atomic variables to try to implement
902 Dekker's mutual exclusion algorithm).
904 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
907 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
908 will only be built and installed when the GNU C Library is configured with
909 --enable-obsolete-rpc. This allows alternative RPC implementations, such
910 as TIRPC or rpcsvc-proto, to be used.
912 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
913 libnss_compat, are deprecated, and will not be built or installed by
916 The NIS(+) support library, libnsl, is also deprecated. By default, a
917 compatibility shared library will be built and installed, but not headers
918 or development libraries. Only a few NIS-related programs require this
919 library. (In particular, the GNU C Library has never required programs
920 that use 'gethostbyname' to be linked with libnsl.)
922 Replacement implementations based on TIRPC, which additionally support
923 IPv6, are available from <https://github.com/thkukuk/>. The configure
924 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
925 name service modules, to be built and installed.
927 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
928 support is enabled, the configured recursive resolver must support EDNS.
929 (Responding to EDNS-enabled queries with responses which are not
930 EDNS-enabled is fine, but FORMERR responses are not.)
932 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
933 servers have not supported this opcode for a long time.
935 * The _res_opcodes variable has been removed from libresolv. It had been
936 exported by accident.
938 * <string.h> no longer includes inline versions of any string functions,
939 as this kind of optimization is better done by the compiler. The macros
940 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
942 * The nonstandard header <xlocale.h> has been removed. Most programs should
943 use <locale.h> instead. If you have a specific need for the definition of
944 locale_t with no other declarations, please contact
945 libc-alpha@sourceware.org and explain.
947 * The obsolete header <sys/ultrasound.h> has been removed.
949 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
951 * The obsolete function cfree has been removed. Applications should use
954 * The stack_t type no longer has the name struct sigaltstack. This changes
955 the C++ name mangling for interfaces involving this type.
957 * The ucontext_t type no longer has the name struct ucontext. This changes
958 the C++ name mangling for interfaces involving this type.
960 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
961 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
962 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
963 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
964 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
965 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
966 fpregset_t type no longer has the name struct fpu. This changes the C++
967 name mangling for interfaces involving those types.
969 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
970 synced with the kernel:
972 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
973 are not supported on this architecture and have been removed.
975 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
976 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
977 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
979 Programs that assume the GET/SETREGS ptrace requests are universally
980 available will now fail to build, instead of malfunctioning at runtime.
982 Changes to build and runtime requirements:
984 * Linux kernel 3.2 or later is required at runtime, on all architectures
985 supported by that kernel. (This is a change from version 2.25 only for
988 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
990 * On most architectures, GCC 4.9 or later is required to build the GNU C
991 Library. On powerpc64le, GCC 6.2 or later is required.
993 Older GCC versions and non-GNU compilers are still supported when
994 compiling programs that use the GNU C Library. (We do not know exactly
995 how old, and some GNU extensions to C may be _de facto_ required. If you
996 are interested in helping us make this statement less vague, please
997 contact libc-alpha@sourceware.org.)
999 Security related changes:
1001 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1002 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1004 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1005 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1007 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1008 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1011 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1012 fixed (CVE-2017-12133).
1014 The following bugs are resolved with this release:
1016 [984] network: Respond to changed resolv.conf in gethostbyname
1017 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1018 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1020 [12189] libc: __stack_chk_fail should not attempt a backtrace
1022 [14096] time: Race condition on timezone/tst-timezone.out
1023 [14172] localedata: az_IR: new locale
1024 [14995] build: glibc fails to build if gold is the default linker, even if
1026 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1027 [16637] network: inet_pton function is accepting IPv6 with bad format
1028 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1029 x86 and other generic code
1030 [16875] localedata: ko_KR: fix lang_name
1031 [17225] localedata: ar_SY: localized month names for May and June are
1033 [17297] localedata: da_DK: wrong date_fmt string
1034 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1035 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1036 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1037 [19066] localedata: ar_SA abbreviated day and month names are in English
1038 [19569] network: resolv: Support an arbitrary number of search domains
1039 [19570] network: Implement random DNS server selection in the stub
1041 [19838] locale: localedef fails on PA-RISC
1042 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1043 order of 0D36 and 0D37
1044 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1046 [20098] libc: FAIL: debug/backtrace-tst on hppa
1047 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1049 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1051 [20313] localedata: Update locale data to Unicode 9.0
1052 [20424] manual: Document how to provide a malloc replacement
1053 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1055 [20686] locale: Add el_GR@euro to SUPPORTED.
1056 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1057 failures consistently
1058 [21015] dynamic-link: Document and fix --enable-bind-now
1059 [21016] nptl: pthread_cond support is broken on hppa
1060 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1061 frame-pointer on i386
1062 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1064 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1065 [21088] libc: Build fails with --enable-static-nss
1066 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1067 generic c code is used
1068 [21109] libc: Tunables broken on big-endian
1069 [21112] math: powf has large ulp errors with base close to 1 and exponent
1071 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1073 [21120] malloc: glibc malloc is incompatible with GCC 7
1074 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1076 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1077 (-0.0) when linking with -lieee
1078 [21171] math: log10, log2 and lgamma return incorrect results
1079 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1080 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1081 [21207] localedata: ce_RU: update weekdays from CLDR
1082 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1083 [21217] localedata: Update months from CLDR-31
1084 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1085 [21243] libc: support_delete_temp_file should issue warning for failed
1087 [21244] libc: support resolv_test_start() socket fd close should be
1089 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1090 new posix_spawn implementation
1091 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1092 leads to lower CPU frequency
1093 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1094 [21261] libc: [sparc64] bits/setjmp.h namespace
1095 [21267] network: [mips] bits/socket.h IOC* namespace
1096 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1097 [21270] libc: mmap64 silently truncates large offset values
1098 [21275] libc: posix_spawn always crashes on ia64 now
1099 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1100 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1101 [21289] libc: Incorrect declaration for 32-bit platforms with
1102 _FILE_OFFSET_BITS=64 causes build error
1103 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1104 not support gethostbyname4_r
1105 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1107 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1109 [21340] libc: Support POSIX_SPAWN_SETSID
1110 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1111 [21359] network: ns_name_pack needs additional byte in destination buffer
1112 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1113 against fragmentation attacks (CVE-2017-12132)
1114 [21369] network: resolv: Remove EDNS fallback
1115 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1117 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1118 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1119 [21393] stdio: Missing dup3 error check in freopen, freopen64
1120 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1121 [21399] localedata: Bad description for U00EC in
1122 localedata/charmaps/CP1254
1123 [21411] malloc: realloc documentation error
1124 [21426] network: sys/socket.h uio.h namespace
1125 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1126 [21445] libc: signal.h bsd_signal namespace
1127 [21455] network: Network headers stdint.h namespace
1128 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1130 [21475] network: resolv: Overlong search path is truncated mid-label
1131 [21511] libc: sigstack namespace
1132 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1133 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1134 bits/syscall.h: No such file or directory
1135 [21517] libc: struct sigaltstack namespace
1136 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1137 [21533] localedata: Update locale data to Unicode 10.0
1139 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1140 junk at end of line, first unrecognized character is `@'
1141 [21538] libc: SIG_HOLD missing for XPG4
1142 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1143 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1144 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1145 [21543] libc: sigevent namespace
1146 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1147 size for general purpose registers in mcontext_t structure
1148 [21550] libc: sigwait namespace
1149 [21552] libc: XPG4 bsd_signal namespace
1150 [21554] libc: sigpause namespace
1151 [21560] libc: sys/wait.h signal.h namespace
1152 [21561] libc: waitid namespace
1153 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1154 '/usr/include/stdlib.h': Permission denied
1155 [21575] libc: sys/wait.h missing struct rusage definition
1156 [21584] libc: sigaltstack etc namespace
1157 [21597] libc: siginterrupt namespace
1158 [21607] math: hppa: FAIL: math/test-tgmath
1159 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1161 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1162 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1163 stack and heap (CVE-2017-1000366)
1164 [21625] libc: wait3 namespace
1165 [21654] nss: Incorrect pointer alignment in NSS group merge result
1167 [21657] network: Parse interface zone id for node-local multicast
1168 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1170 [21666] libc: .symver is used on common symbol
1171 [21668] network: resolv: res_init cross-thread broadcast introduces race
1173 [21687] math: tgmath.h totalorder, totalordermag return type
1174 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1176 [21696] libc: Incorrect assumption of of __cpu_mask in
1177 posix/sched_cpucount.c
1178 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1179 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1181 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1182 leading to relocation crash
1183 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1184 `resolv_conf_matches (resp, conf)' failed.
1185 [21710] localedata: Added Samoan language locale for Samoa
1186 [21711] localedata: Pashto yesstr/nostr locale are missing
1187 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1188 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1189 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1190 [21723] localedata: yesstr/nostr missing for Chinese language locale
1191 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1193 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1195 [21728] localedata: New Locale for Tongan language
1196 [21729] localedata: incorrect LC_NAME fields for hi_IN
1197 [21733] localedata: yesstr and nostr are missing for zh_HK
1198 [21734] localedata: Missing yesstr and nostr are for kw_GB
1199 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1200 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1201 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1202 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1204 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1206 [21749] localedata: Wrong abbreviated day name (“abday”) for
1208 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1209 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1210 [21759] localedata: missing yesstr and nostr for Tigrinya
1211 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1212 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1213 [21767] localedata: Missing Bislama locales
1214 [21768] localedata: Missing yesstr and nostr for aa_ET
1215 [21770] localedata: Missing Field in li_NL
1216 [21778] nptl: Robust mutex may deadlock
1217 [21779] libc: MicroBlaze segfaults when loading libpthread
1218 [21783] localedata: Fix int_select international_call_prefixes
1219 [21784] localedata: Inconsistency in country_isbn
1220 [21788] localedata: Missing Country Postal Abbreviations
1221 [21794] localedata: Added-country_isbn-for-Italy
1222 [21795] localedata: Add/Fix country_isbn for France
1223 [21796] localedata: Added country_isbn for Republic of Korea
1224 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1225 [21799] localedata: Added int_select international_call_prefixes
1226 [21801] localedata: Added int_select international_call_prefixes
1227 [21804] nptl: Double semicolon in thread-shared-types.h
1228 [21807] localedata: LC_ADDRESS fix for pap_CW
1229 [21808] localedata: Fix LC_ADDRESS for pap_AW
1230 [21821] localedata: Added country_name in mai_IN
1231 [21822] localedata: Fix LC_TIME for mai_IN
1232 [21823] localedata: missing yesstr, nostr for sa_IN
1233 [21825] localedata: Fix name_mrs for mag_IN
1234 [21828] localedata: 2.26 changelog should mention user visible changes
1236 [21835] localedata: Added Maithili language locale for Nepal
1237 [21838] localedata: Removed redundant data for the_NP
1238 [21839] localedata: Fix LC_MONETARY for ta_LK
1239 [21844] localedata: Fix Latin characters and Months Sequence.
1240 [21848] localedata: Fix mai_NP Title Name
1245 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1246 24731-2:2010, is supported to enable declarations of functions from that
1247 TR. Note that not all functions from that TR are supported by the GNU C
1250 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1251 18661-1:2014, is supported to enable declarations of functions and macros
1252 from that TS. Note that not all features from that TS are supported by
1255 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1256 18661-4:2015, is supported to enable declarations of functions and macros
1257 from that TS. Note that most features from that TS are not supported by
1260 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1261 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1262 Since the GNU C Library defaults to a much newer revision of POSIX, this
1263 will only affect programs that specifically request an old conformance
1264 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1265 see a change in the visible declarations, but a program compiled with
1266 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1269 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1270 defined by all multithreaded code, but glibc has not required this for
1273 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1274 means that in a future release, the macros “major”, “minor”, and “makedev”
1275 will only be available from <sys/sysmacros.h>.
1277 These macros are not part of POSIX nor XSI, and their names frequently
1278 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1279 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1280 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1283 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1284 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1285 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1287 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1288 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1289 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1290 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1291 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1292 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1293 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1294 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1295 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1296 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1297 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1300 * New <math.h> features are added from TS 18661-1:2014:
1302 - Signaling NaN macros: SNANF, SNAN, SNANL.
1304 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1305 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1306 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1308 - llogb functions: the llogb, llogbf and llogbl functions, and the
1309 FP_LLOGB0 and FP_LLOGBNAN macros.
1311 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1314 - Comparison macros: iseqsig.
1316 - Classification macros: iscanonical, issubnormal, iszero.
1318 - Total order functions: totalorder, totalorderf, totalorderl,
1319 totalordermag, totalordermagf, totalordermagl.
1321 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1323 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1324 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1326 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1327 are added to libc. They convert a floating-point number into string.
1329 * Most of glibc can now be built with the stack smashing protector enabled.
1330 It is recommended to build glibc with --enable-stack-protector=strong.
1331 Implemented by Nick Alcock (Oracle).
1333 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1334 intended to be used instead of memset() to erase sensitive data after use;
1335 the compiler will not optimize out calls to explicit_bzero even if they
1336 are "unnecessary" (in the sense that no _correct_ program can observe the
1337 effects of the memory clear).
1339 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1340 to float instead of double. This does not affect the ABI of any libraries
1341 that are part of the GNU C Library, but may affect the ABI of other
1342 libraries that use this type in their interfaces.
1344 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1345 float_t and double_t types are now defined to long double instead of float
1346 and double. These options are not the default, and this does not affect
1347 the ABI of any libraries that are part of the GNU C Library, but it may
1348 affect the ABI of other libraries that use this type in their interfaces,
1349 if they are compiled or used with those options.
1351 * The getentropy and getrandom functions, and the <sys/random.h> header file
1354 * The buffer size for byte-oriented stdio streams is now limited to 8192
1355 bytes by default. Previously, on Linux, the default buffer size on most
1356 file systems was 4096 bytes (and thus remains unchanged), except on
1357 network file systems, where the buffer size was unpredictable and could be
1358 as large as several megabytes.
1360 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1361 for the Linux quota interface which predates kernel version 2.4.22 has
1364 * The malloc_get_state and malloc_set_state functions have been removed.
1365 Already-existing binaries that dynamically link to these functions will
1366 get a hidden implementation in which malloc_get_state is a stub. As far
1367 as we know, these functions are used only by GNU Emacs and this change
1368 will not adversely affect already-built Emacs executables. Any undumped
1369 Emacs executables, which normally exist only during an Emacs build, should
1370 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1372 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1373 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1374 “no-ip6-dotint” had already been the default, and support for the
1375 “ip6-dotint” option was removed from the Internet in 2006.
1377 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1378 flag from <resolv.h> have been removed. The option relied on a
1379 backwards-incompatible DNS extension which was never deployed on the
1382 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1383 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1384 They were already unimplemented.
1386 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1387 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1388 removed again from the IETF name lookup interface specification in RFC
1389 2553. Applications should use getaddrinfo instead.
1391 * DNSSEC-related declarations and definitions have been removed from the
1392 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1393 decode the data part of DNSSEC record types. Previous versions of glibc
1394 only implemented minimal support for the previous version of DNSSEC, which
1395 is incompatible with the currently deployed version.
1397 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1398 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1399 <arpa/nameser.h> header file because the distinction between RR types and
1400 meta-RR types is not officially standardized, subject to revision, and
1401 thus not suitable for encoding in a macro.
1403 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1404 and rhook members of the res_state type in <resolv.h> have been removed.
1405 The glibc stub resolver did not support these hooks, but the header file
1406 did not reflect that.
1408 * For multi-arch support it is recommended to use a GCC which has
1409 been built with support for GNU indirect functions. This ensures
1410 that correct debugging information is generated for functions
1411 selected by IFUNC resolvers. This support can either be enabled by
1412 configuring GCC with '--enable-gnu-indirect-function', or by
1413 enabling it by default by setting 'default_gnu_indirect_function'
1414 variable for a particular architecture in the GCC source file
1417 * GDB pretty printers have been added for mutex and condition variable
1418 structures in POSIX Threads. When installed and loaded in gdb these pretty
1419 printers show various pthread variables in human-readable form when read
1420 using the 'print' or 'display' commands in gdb.
1422 * Tunables feature added to allow tweaking of the runtime for an application
1423 program. This feature can be enabled with the '--enable-tunables' configure
1424 flag. The GNU C Library manual has details on usage and README.tunables has
1425 instructions on adding new tunables to the library.
1427 * A new version of condition variables functions have been implemented in
1428 the NPTL implementation of POSIX Threads to provide stronger ordering
1431 * A new version of pthread_rwlock functions have been implemented to use a more
1432 scalable algorithm primarily through not using a critical section anymore to
1435 Security related changes:
1437 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1438 have been created with makecontext could fail to terminate due to a
1439 missing .cantunwind annotation. This has been observed to lead to a hang
1440 (denial of service) in some Go applications compiled with gccgo. Reported
1441 by Andreas Schwab. (CVE-2016-6323)
1443 * The DNS stub resolver functions would crash due to a NULL pointer
1444 dereference when processing a query with a valid DNS question type which
1445 was used internally in the implementation. The stub resolver now uses a
1446 question type which is outside the range of valid question type values.
1449 The following bugs are resolved with this release:
1451 [4099] stdio: Overly agressive caching by stream i/o functions.
1452 [7065] build: Support building glibc with -fstack-protector or -fstack-
1454 [9842] localedata: en_CA: incorrect date format
1455 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1456 before it started waiting
1457 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1458 [15765] nptl: sem_open is wrongly a cancellation point
1459 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1460 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1462 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1463 library linked with pthread
1464 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1465 "FIXME: Ingo" issue)
1466 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1467 [17252] libc: getrandom and getentropy syscall
1468 [17730] malloc: thread-local storage is sometimes improperly free()'d
1469 after being __libc_memalign()'d
1470 [18241] stdio: failed fseek on memstream does not set errno and can fail
1472 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
1474 [18463] nptl: pthread_cond_broadcast issue when surrounded by
1475 PTHREAD_PRIO_INHERIT mutex on ARM
1476 [18784] network: res_query and related function crash for special record
1477 type queries (CVE-2015-5180)
1478 [19380] math: strtod does not raise "inexact"
1479 [19387] string: Integer overflow in memchr
1480 [19390] string: Integer overflow in strncat
1481 [19398] build: linknamespace tests fail with massively parallel build
1482 [19402] nptl: Deadlock with robust shared mutex and asynchronous
1484 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
1485 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
1486 [19514] libc: [PATCH] Fix spelling errors in spelling
1487 "implement"/"implementation" in several places
1488 [19582] network: Deprecate RES_USE_INET6
1489 [19673] manual: clog10 docs appear to be erroneous
1490 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
1491 causes a segmentation fault
1492 [19826] libc: invalid pointer returned from __tls_get_addr with static
1494 [20016] network: resolv: Remove hooks support from the API
1495 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
1497 [20033] math: [x86_64] vectorized math function don't call the __finite
1499 [20116] nptl: use after free in pthread_create
1500 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
1501 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
1503 [20311] nptl: please install proc_service.h
1504 [20366] libc: Compilation errors in installed headers in strict-compliance
1506 [20370] malloc: malloc: Arena free list management is still racy
1507 (incorrect fix in bug 19243)
1508 [20386] libc: assert (X = 0) does not result in GCC warning
1509 [20432] malloc: malloc: Minimize interface required for interposition
1510 [20435] libc: Missing unwind info in __startcontext causes infinite loop
1511 in _Unwind_Backtrace (CVE-2016-6323)
1512 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
1513 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
1515 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
1516 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
1517 [20477] network: resolv: incorrect double-checked locking related to
1519 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
1521 [20495] math: x86_64 performance degradation due to AVX/SSE transition
1523 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
1524 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
1525 cause transition penalty
1526 [20517] math: sparcv9 missing fdiml compat symbol
1527 [20524] manual: strverscmp is inconsistent
1528 [20525] libc: <sys/quota.h> should be based on kernel headers
1529 [20539] math: GCC 7 -static -lm fails to link at -O3
1530 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
1532 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
1534 [20591] network: Remove obsolete DNSSEC support
1535 [20592] network: DNS resource record type classification macros in
1536 <arpa/nameser.h> are incorrect
1537 [20593] network: Update DNS RR type definitions
1538 [20611] network: getaddrinfo accepts invalid numeric scope IDs
1539 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
1541 [20629] network: libresolv: Remove support for bitstring labels
1543 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
1544 assertion: "maxidx >= 2"
1545 [20660] math: [arm] Use VSQRT
1546 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
1547 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
1548 [20689] libc: Test for FMA should also check for AVX.
1549 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
1550 [20715] math: iszero macro breaks existing code
1551 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
1552 [20728] libc: powerpc: Missing TOC stub in clone
1553 [20729] build: glibc-2.24 fails to build for i486 with -Os
1554 [20750] build: Build fails with default PIE enabled gcc-6.x
1555 [20768] math: [alpha] sqrt fegetenv namespace
1556 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
1558 [20787] math: float_t is defined as float incorrectly on x86_64 even if
1559 __FLT_EVAL_METHOD__ is 2
1560 [20790] network: rpcgen buffer overrun in get_prog_declaration
1561 [20822] nptl: race condition in __lll_unlock_elision on powerpc
1562 [20829] libc: crypt snprintf namespace
1563 [20847] libc: tst-vfork3 failure
1564 [20855] math: Default bits/mathdef.h has inappropriate float_t
1565 [20859] math: [sh4] FP_ILOGB0 invalid
1566 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
1567 U+20AC), not same as GBK
1568 [20915] dynamic-link: global-dynamic TLS broken on aarch64
1569 [20916] math: pow handling of sNaN arguments
1570 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
1571 [20919] math: Bad pow (qNaN, 0) result with -lieee
1572 [20940] math: hypot sNaN handling
1573 [20947] math: fmax, fmin sNaN handling
1574 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
1575 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
1577 [20971] string: powerpc64/power7 memchr overflows internal pointer check
1578 [20973] nptl: robust mutexes: Lost wake-ups
1579 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
1580 [20978] nis: strlen on null pointer in nss_nisplus
1581 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
1583 [21014] string: i686 memchr overflows internal pointer check
1584 [21019] libc: [mips] n32 lseek incorrect on overflow
1585 [21022] libc: [microblaze] __backtrace get_frame_size namespace
1586 [21026] libc: [MIPS] readahead syscall is broken on n64
1587 [21028] math: Fallback fesetexceptflag should always succeed
1588 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
1589 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
1591 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
1592 [21061] librt: [microblaze] librt lost clock_* exports
1593 [21073] libc: tunables: insecure environment variables passed to
1594 subprocesses with AT_SECURE
1595 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
1599 * The minimum Linux kernel version that this version of the GNU C Library
1600 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
1601 kernel version 2.6.32 or later suffices (on architectures that already
1602 required kernel versions more recent than 3.2, those requirements remain
1603 unchanged). Linux 3.2 or later kernel headers are required on all
1606 * The pap_AN locale has been deleted. This has been deprecated for a long
1607 time. It has been replaced by pap_AW & pap_CW, both of which have long
1608 been included in previous releases.
1610 * The readdir_r and readdir64_r functions have been deprecated. It is
1611 recommended to use readdir and readdir64 instead.
1613 * The type “union wait” has been removed. It was deprecated in the early
1614 1990s and never part of POSIX. Application code should use the int type
1615 instead of “union wait”.
1617 * A new NSS action is added to facilitate large distributed system
1618 administration. The action, MERGE, allows remote user stores like LDAP
1619 to be merged into local user stores like /etc/groups in order to provide
1620 easy to use, updated, and managed sets of merged credentials. The new
1621 action can be used by configuring it in /etc/nsswitch.conf:
1622 group: files [SUCCESS=merge] nis
1623 Implemented by Stephen Gallagher (Red Hat).
1625 * The deprecated __malloc_initialize_hook variable has been removed from the
1628 * The long unused localedef --old-style option has been removed. It hasn't
1629 done anything in over 16 years. Scripts using this option can safely
1632 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
1633 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
1634 return the next representable value in the direction of positive infinity
1635 and the nextdown functions return the next representable value in the
1636 direction of negative infinity. These are currently enabled as GNU
1639 Security related changes:
1641 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
1642 could result in a stack overflow when getnetbyname was called with an
1643 overly long name. (CVE-2016-3075)
1645 * Previously, getaddrinfo copied large amounts of address data to the stack,
1646 even after the fix for CVE-2013-4458 has been applied, potentially
1647 resulting in a stack overflow. getaddrinfo now uses a heap allocation
1648 instead. Reported by Michael Petlan. (CVE-2016-3706)
1650 * The glob function suffered from a stack-based buffer overflow when it was
1651 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
1652 Reported by Alexander Cherepanov. (CVE-2016-1234)
1654 * The Sun RPC UDP client could exhaust all available stack space when
1655 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
1656 alloca plugin for GCC. (CVE-2016-4429)
1658 * The IPv6 name server management code in libresolv could result in a memory
1659 leak for each thread which is created, performs a failing naming lookup,
1660 and exits. Over time, this could result in a denial of service due to
1661 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
1663 The following bugs are resolved with this release:
1665 [1170] localedata: ne_NP: update Nepali locale definition file
1666 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
1668 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
1669 [6796] math: fdim() does not set errno on overflow
1670 [10354] libc: posix_spawn should use vfork() in more cases than presently
1671 [11213] localedata: localedata: add copyright disclaimer to locale files
1672 [12143] localedata: chr_US: new Cherokee locale
1673 [12450] localedata: sgs_LT: new locale
1674 [12676] localedata: ln_CD: new locale
1675 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
1677 [13304] math: fma, fmaf, fmal produce wrong results
1678 [14259] build: --localedir arg to configure is ignored
1679 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
1680 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
1681 [14934] localedata: es_CL: wrong first weekday chilean locale
1682 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
1684 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
1686 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
1687 [15368] nptl: raise() is not async-signal-safe
1688 [15479] math: ceil, floor, round and trunc raise inexact exception
1689 [15578] localedata: kk_KZ: various updates
1690 [16003] localedata: pap_AN: punt old locale
1691 [16137] localedata: iw_IL: punt old locale
1692 [16190] localedata: eo: new esperanto locale
1693 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
1694 [16742] malloc: race condition: pthread_atfork() called before first
1695 malloc() results in unexpected locking behaviour/deadlocks
1696 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
1698 [16983] localedata: postal_fmt does not allow %l and %n modifiers
1699 [17565] localedata: pt_PT: wrong (work-)week start
1700 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
1701 [17950] build: Build fails with -msse
1702 [18205] localedata: be_BY*: wrong first_weekday and first_workday
1703 [18433] libc: posix_spawn does not return correctly upon failure to
1705 [18453] localedata: charmaps/IBM875: incorrect codes
1706 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
1708 [18896] localedata: he_IL: improvements for currency
1709 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
1710 Romanian locale data
1711 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
1713 [19056] libc: Deprecate readdir_r
1714 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
1716 [19198] localedata: nl_NL: small improvements for Dutch locales
1717 [19257] network: Per-thread memory leak in __res_vinit with IPv6
1718 nameservers (CVE-2016-5417)
1719 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
1721 [19400] locale: Language missing in "iso-639.def", trivial fix in
1723 [19431] malloc: Deadlock between fflush, getdelim, and fork
1724 [19505] libc: Incorrect file descriptor validity checks in
1725 posix_spawn_file_actions_add{open,close,dup2}
1726 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
1727 when using RTLD_NEXT
1728 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
1729 `intl/{gettextP,loadinfo}.h'
1730 [19534] libc: execle, execlp may use malloc
1731 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
1732 [19573] network: res_nclose and __res_maybe_init disagree about name
1733 server initialization, breaking Hesiod
1734 [19575] localedata: Status of GB18030 tables
1735 [19581] localedata: sr_* date_fmt string contains additional newline
1736 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
1738 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
1739 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
1740 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
1741 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
1743 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
1745 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
1747 [19610] dynamic-link: ldconfig -X removes stale symbolic links
1748 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
1749 [19633] locale: strfmon_l applies global locale to number formatting
1750 [19642] network: Memory leak in getnameinfo
1751 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
1752 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
1754 [19654] math: [x86_64] Need testcase for BZ #19590 fix
1755 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
1757 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
1758 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
1760 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
1762 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
1764 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
1765 pointers and lengths in error-case.
1766 [19727] locale: Converting from/to UTF-xx with iconv() does not always
1767 report errors on UTF-16 surrogates values.
1768 [19755] nscd: nscd assertion failure in gc
1769 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
1770 [19759] libc: mempcpy shouldn't be inlined
1771 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
1772 [19765] libc: s390 needs an optimized mempcpy
1773 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1774 NAME_MAX limit assumption (CVE-2016-1234)
1775 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1776 [19787] network: Missing and incorrect truncation checks in getnameinfo
1777 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1779 [19791] network: Assertion failure in res_query.c with un-connectable name
1781 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1782 [19822] math: libm.so install clobbers old version
1783 [19825] network: resolv: send_vc can return uninitialized data in second
1784 response to getaddrinfo
1785 [19830] network: nss_dns: should check RDATA length against buffer length
1786 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1787 confronted with A/AAAA records of invalid size
1788 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1789 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1790 [19853] stdio: Printing IBM long double in decimal with high precision is
1792 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1793 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1794 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1796 [19865] network: Assertion failure or memory leak in
1797 _nss_dns_getcanonname_r
1798 [19868] network: nss_dns: netent code does not skip over non-PTR records
1799 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1801 [19881] string: Improve x86-64 memset
1802 [19907] string: Incorrect memcpy tests
1803 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1805 [19925] libc: termios.h XCASE namespace
1806 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1807 [19929] libc: limits.h NL_NMAX namespace
1808 [19931] stdio: Memory leak in vfprintf
1809 [19957] libc: clone(CLONE_VM) access invalid parent memory
1810 [19963] localedata: en_IL: New locale
1811 [19989] stdio: stdio.h cuserid namespace
1812 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1814 [19996] locale: langinfo.h nl_langinfo_l namespace
1815 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1816 [20010] network: getaddrinfo: Stack overflow in hostent translation
1818 [20012] stdio: libio: fmemopen append mode failure
1819 [20014] stdio: stdio.h namespace for pre-threads POSIX
1820 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1821 [20023] libc: fcntl.h timespec namespace
1822 [20024] math: [x86_64] vectorized sincos trashes the stack
1823 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1824 [20041] time: sys/time.h timespec namespace
1825 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1826 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1827 [20051] libc: ttyslot in wrong header under wrong conditions
1828 [20054] libc: gethostname not declared for XPG4
1829 [20055] libc: termios.h missing tcgetsid for XPG4
1830 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1832 [20073] libc: sys/stat.h fchmod namespace
1833 [20074] libc: stdlib.h rand_r namespace
1834 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1835 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1837 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1838 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1840 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1841 [20119] libc: Wrong mask for processors level type from CPUID
1842 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1843 AS not supporting AVX512
1844 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1846 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1847 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1849 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1850 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1851 [20178] libc: posix_spawn{p} should not call exit
1852 [20191] stdio: libio: vtables hardening
1853 [20195] string: FMA4 detection requires CPUID execution with register
1855 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1856 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1858 [20212] math: acos (sNaN) returns sNaN
1859 [20213] math: asin (sNaN) returns sNaN
1860 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1861 [20218] math: [i386] asinhl (sNaN) returns sNaN
1862 [20219] math: [i386] atanhl (sNaN) returns sNaN
1863 [20222] stdio: fopencookie: Mangle function pointers
1864 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1865 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1866 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1868 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1869 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1870 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1871 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1872 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1873 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1874 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1875 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1876 [20240] math: modf (sNaN) returns sNaN
1877 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1878 [20250] math: frexp (sNaN) returns sNaN
1879 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1880 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1882 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1883 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1884 subscript is below array bounds [-Werror=array-bounds]
1885 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1886 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1888 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1889 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1891 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1892 "invalid" exceptions
1893 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1894 [20316] localedata: id_ID: Februari instead of Pebruari
1895 [20327] string: POWER8 strcasecmp returns incorrect result
1896 [20347] math: Failure: Test: j0_downward (0xap+0)
1897 [20348] libc: FAIL: misc/tst-preadvwritev64
1898 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1899 [20350] libc: There is no test for p{read,write}64
1900 [20357] math: Incorrect cos result for 1.5174239687223976
1901 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1905 * Unicode 8.0.0 Support: Character encoding, character type info, and
1906 transliteration tables are all updated to Unicode 8.0.0, using new
1907 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1908 These updates cause user visible changes, such as the fixes for bugs
1909 89, 16061, and 18568.
1911 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1912 kernel-internal CPU set size. This means that requests that change the
1913 CPU affinity which failed before (for example, an all-ones CPU mask) will
1914 now succeed. Applications that need to determine the effective CPU
1915 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1916 setting it because the kernel can adjust it (and the previous size check
1917 would not detect this in the majority of cases).
1919 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1920 the following new symbols are used: fts64_children, fts64_close,
1921 fts64_open, fts64_read and fts64_set.
1923 * getaddrinfo now detects certain invalid responses on an internal netlink
1924 socket. If such responses are received, an affected process will
1925 terminate with an error message of "Unexpected error <number> on netlink
1926 descriptor <number>" or "Unexpected netlink response of size <number> on
1927 descriptor <number>". The most likely cause for these errors is a
1928 multi-threaded application which erroneously closes and reuses the netlink
1929 file descriptor while it is used by getaddrinfo.
1931 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1932 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1933 unnecessary serialization of memory allocation requests across threads.
1934 The defect is now corrected. Users should see a substantial increase in
1935 the concurent throughput of allocation requests for applications which
1936 trigger this bug. Affected applications typically create and
1937 destroy threads frequently. (Bug 19048 was reported and analyzed by
1940 * There is now a --disable-timezone-tools configure option for disabling the
1941 building and installing of the timezone related utilities (zic, zdump, and
1942 tzselect). This is useful for people who build the timezone data and code
1943 independent of the GNU C Library.
1945 * The obsolete header <regexp.h> has been removed. Programs that require
1946 this header must be updated to use <regex.h> instead.
1948 * The obsolete functions bdflush, create_module, get_kernel_syms,
1949 query_module and uselib are no longer available to newly linked binaries;
1950 the header <sys/kdaemon.h> has been removed. These functions and header
1951 were specific to systems using the Linux kernel and could not usefully be
1952 used with the GNU C Library on systems with version 2.6 or later of the
1955 * Optimized string, wcsmbs and memory functions for IBM z13.
1956 Implemented by Stefan Liebler.
1958 * Newly linked programs that define a variable called signgam will no longer
1959 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1960 require signgam to be set by those functions must ensure that they use the
1961 variable provided by the GNU C Library and declared in <math.h>, without
1962 defining their own copy.
1964 * The minimum GCC version that can be used to build this version of the GNU
1965 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1966 still be used to compile programs using the GNU C Library.
1968 Security related changes:
1970 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1971 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1973 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1974 the pointer guard feature. It is always enabled. Previously,
1975 LD_POINTER_GUARD could be used to disable security hardening in binaries
1976 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1979 * An integer overflow in hcreate and hcreate_r could lead to an
1980 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1982 * The catopen function no longer has unbounded stack usage. Reported by
1983 Max. (CVE-2015-8779)
1985 * The nan, nanf and nanl functions no longer have unbounded stack usage
1986 depending on the length of the string passed as an argument to the
1987 functions. Reported by Joseph Myers. (CVE-2014-9761)
1989 * A stack-based buffer overflow was found in libresolv when invoked from
1990 libnss_dns, allowing specially crafted DNS responses to seize control
1991 of execution flow in the DNS client. The buffer overflow occurs in
1992 the functions send_dg (send datagram) and send_vc (send TCP) for the
1993 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1994 family. The use of AF_UNSPEC triggers the low-level resolver code to
1995 send out two parallel queries for A and AAAA. A mismanagement of the
1996 buffers used for those queries could result in the response of a query
1997 writing beyond the alloca allocated buffer created by
1998 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
1999 the overflow. Thanks to the Google Security Team and Red Hat for
2000 reporting the security impact of this issue, and Robert Holiday of
2001 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2003 The following bugs are resolved with this release:
2005 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2006 [887] math: Math library function "logb" and "nextafter" inconsistent
2007 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2008 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2009 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2010 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2012 [4404] localedata: German translation of "Alarm clock" is misleading
2013 [6799] math: nextafter() and nexttoward() doen't set errno on
2014 overflow/underflow errors
2015 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2017 [10432] nis: _nss_nis_setnetgrent assertion failure
2018 [11460] libc: fts has no LFS support
2019 [12926] network: getaddrinfo()/make_request() may spin forever
2020 [13065] nptl: Race condition in pthread barriers
2021 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2022 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2024 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2025 [14912] libc: Rename non-installed bits/*.h headers
2026 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2027 [15367] math: Let gcc use __builtin_isinf
2028 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2029 [15421] math: lgamma wrongly sets signgam for ISO C
2030 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2031 FE_INVALID with argument out of range
2032 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2034 [15786] dynamic-link: ifunc resolver functions can smash function
2036 [15918] math: Unnecessary check for equality in hypotf()
2037 [16061] localedata: Review / update transliteration data
2038 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2040 [16141] time: strptime %z offset restriction
2041 [16171] math: drem should be alias of remainder
2042 [16296] math: fegetround is pure?
2043 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2044 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2046 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2047 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2049 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2050 "Exception "Inexact" set" on ppc32
2051 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2052 [16517] math: Missing underflow exception from tanf/tan/tanl
2053 [16519] math: Missing underflow exception from sinhf
2054 [16520] math: Missing underflow exception from tanhf
2055 [16521] math: Missing underflow exception from exp2
2056 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2058 [16734] stdio: fopen calls mmap to allocate its buffer
2059 [16961] math: nan function incorrect handling of bad sequences
2060 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2061 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2062 [16985] locale: localedef: confusing error message when opening output
2064 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2065 [17197] locale: Redundant shift character in iconv conversion output at
2067 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2068 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2069 [17250] dynamic-link: static linking breaks nss loading
2070 (getaddrinfo/getpwnam/etc...)
2071 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2073 [17441] math: isnan() should use __builtin_isnan() in GCC
2074 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2075 (related to lock elision)
2076 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2077 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2078 [17887] time: strptime should be able to parse "+01:00" style timezones
2079 [17905] libc: catopen() Multiple unbounded stack allocations
2081 [18084] libc: backtrace (..., 0) dumps core on x86
2082 [18086] libc: nice() sets errno to 0 on success
2083 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2084 is too large (CVE-2015-8778)
2085 [18251] dynamic-link: SONAME missing when audit modules provides path
2086 [18265] libc: add attributes for wchar string and memory functions
2087 [18370] math: csqrt missing underflows
2088 [18421] libc: [hppa] read-only segment has dynamic relocations
2089 [18472] libc: Obsolete syscall wrappers should be compat symbols
2090 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2091 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2092 [18525] localedata: Remove locale timezone information
2093 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2094 [18568] localedata: Update locale data to Unicode 8.0
2095 [18589] locale: sort-test.sh fails at random
2096 [18595] math: ctan, ctanh missing underflows
2097 [18604] libc: assert macro-expands its argument
2098 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2099 contains a vector instruction exception.
2100 [18611] math: j1, jn missing errno setting on underflow
2101 [18618] localedata: sync Chechen locale definitions with other *_RU
2103 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2104 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2105 [18665] network: In send_dg, the recvfrom function is NOT always using the
2106 buffer size of a newly created buffer (CVE-2015-7547)
2107 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2109 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2111 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2112 [18699] math: tilegx cproj() for various complex infinities does not yield
2114 [18724] libc: Harden put*ent functions against data injection
2115 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2116 [18755] build: build errors with -DNDEBUG
2117 [18757] stdio: fmemopen fails to set errno on failure
2118 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2120 [18781] libc: openat64 lacks O_LARGEFILE
2121 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2122 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2123 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2124 [18790] math: [ldbl-128ibm] tanhl inaccurate
2125 [18795] libc: stpncpy fortification misses buffer lengths that are
2126 statically too large
2127 [18796] build: build fails for --disable-mathvec
2128 [18803] math: hypot missing underflows
2129 [18820] stdio: fmemopen may leak memory on failure
2130 [18823] math: csqrt spurious underflows
2131 [18824] math: fma spurious underflows
2132 [18825] math: pow missing underflows
2133 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2134 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2135 [18870] build: sem_open.c fails to compile with missing symbol
2137 [18872] stdio: Fix memory leak in printf_positional
2138 [18873] libc: posix_fallocate overflow check ineffective
2139 [18875] math: Excess precision leads incorrect libm
2140 [18877] libc: arm: mmap offset regression
2141 [18887] libc: memory corruption when using getmntent on blank lines
2142 [18918] localedata: hu_HU: change time to HH:MM:SS format
2143 [18921] libc: Regression: extraneous stat() and fstat() performed by
2145 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2146 binaries (CVE-2015-8777)
2147 [18951] math: tgamma missing underflows
2148 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2150 [18953] localedata: lt_LT: change currency symbol to the euro
2151 [18956] math: powf inaccuracy
2152 [18961] math: [i386] exp missing underflows
2153 [18966] math: [i386] exp10 missing underflows
2154 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2155 [18969] build: multiple string test failures due to missing locale
2157 [18970] libc: Reference of pthread_setcancelstate in libc.a
2158 [18977] math: float / long double Bessel functions not in XSI POSIX
2159 [18980] math: i386 libm functions return with excess range and precision
2160 [18981] math: i386 scalb*, ldexp return with excess range and precision
2161 [18982] stdio: va_list and vprintf
2162 [18985] time: Passing out of range data to strftime() causes a segfault
2164 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2165 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2166 [19012] locale: iconv_open leaks memory on error path
2167 [19016] math: clog, clog10 inaccuracy
2168 [19018] nptl: Mangle function pointers in tls_dtor_list
2169 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2170 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2171 [19048] malloc: malloc: arena free list can become cyclic, increasing
2173 [19049] math: [powerpc] erfc incorrect zero sign
2174 [19050] math: [powerpc] log* incorrect zero sign
2175 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2176 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2177 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2178 [19074] network: Data race in _res_hconf_reorder_addrs
2179 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2180 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2181 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2183 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2185 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2186 [19086] manual: posix_fallocate64 documented argument order is wrong.
2187 [19088] math: lround, llround missing exceptions close to overflow
2189 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2190 [19095] math: dbl-64 lrint incorrect for 64-bit long
2191 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2192 [19124] dynamic-link: ld.so failed to build with older assmebler
2193 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2194 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2195 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2196 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2197 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2198 pthread_setaffinity_np
2199 [19156] math: [ldbl-128] j0l spurious underflows
2200 [19164] nptl: tst-getcpu fails with many possible CPUs
2201 [19168] math: math/test-ildoubl and math/test-ldouble failure
2202 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2203 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2205 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2206 (FE_NOMASK_ENV) do not clear SSE exceptions
2207 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2208 _int_new_arena/reused_arena
2209 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2210 [19201] math: dbl-64 remainder incorrect sign of zero result
2211 [19205] math: bits/math-finite.h conditions do not match math.h and
2213 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2214 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2215 for C99-based standards
2216 [19212] libc: features.h not -Wundef clean
2217 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2219 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2220 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2221 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2223 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2224 "inexact" exceptions
2225 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2227 [19242] libc: strtol incorrect in Turkish locales
2228 [19243] malloc: reused_arena can pick an arena on the free list, leading
2229 to an assertion failure and reference count corruption
2230 [19253] time: tzset() ineffective when temporary TZ did not include DST
2232 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2233 [19270] math: [hppa] Shared libm missing __isnanl
2234 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2235 MAP_HUGETLB and MAP_STACK defines
2236 [19313] nptl: Wrong __cpu_mask for x32
2237 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2238 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2239 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2240 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2241 [19363] time: x32: times() return value wrongly truncates/sign extends
2243 [19367] dynamic-link: Improve branch prediction on Silvermont
2244 [19369] network: Default domain name not reset by res_ninit when "search"
2245 / "domain" entry is removed from resolv.conf
2246 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2248 [19385] localedata: bg_BG: time separator should be colon, not comma
2249 [19408] libc: linux personality syscall wrapper may erroneously return an
2250 error on 32-bit architectures
2251 [19415] libc: dladdr returns wrong names on hppa
2252 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2253 IBM905, IBM907, and IBM909
2254 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2255 [19443] build: build failures with -DDEBUG
2256 [19451] build: Make check fails on test-double-vlen2
2257 [19462] libc: Glibc failed to build with -Os
2258 [19465] math: Wrong code with -Os
2259 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2261 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2263 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2264 [19486] math: S390: Math tests fail with "Exception Inexact set".
2265 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2266 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2268 [19590] math: Fail to build shared objects that use libmvec.so functions.
2272 * The following bugs are resolved with this release:
2274 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2275 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2276 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2277 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2278 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2279 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2280 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2281 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2282 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2283 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2284 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2285 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2286 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2287 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2288 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2289 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2290 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2291 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2292 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2293 18657, 18676, 18694, 18696, 18887.
2295 * Cache information can be queried via sysconf() function on s390 e.g. with
2296 _SC_LEVEL1_ICACHE_SIZE as argument.
2298 * A buffer overflow in gethostbyname_r and related functions performing DNS
2299 requests has been fixed. If the NSS functions were called with a
2300 misaligned buffer, the buffer length change due to pointer alignment was
2301 not taken into account. This could result in application crashes or,
2302 potentially arbitrary code execution, using crafted, but syntactically
2303 valid DNS responses. (CVE-2015-1781)
2305 * The time zone file parser has been made more robust against crafted time
2306 zone files, avoiding heap buffer overflows related to the processing of
2307 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2308 large time zone data files. Overly long time zone specifiers in the TZ
2309 variable no longer result in stack overflows and crashes.
2311 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2312 for LD and GD on x86 and x86-64, has been implemented. You will need
2313 binutils-2.24 or later to enable this optimization.
2315 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2316 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2317 Hat). These updates cause user visible changes, such as the fix for bug
2320 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2321 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2322 condition in some applications.
2324 * Added vector math library named libmvec with the following vectorized x86_64
2325 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2327 The library can be disabled with --disable-mathvec. Use of the functions is
2328 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2329 Shared library libmvec.so is linked in as needed when using -lm (no need to
2330 specify -lmvec explicitly for not static builds).
2331 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2333 * A new fmemopen implementation has been added with the goal of POSIX
2334 compliance. The new implementation fixes the following long-standing
2335 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2336 old implementation is still present for use be by existing binaries.
2338 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2339 releases. It has been fixed to match 2.19 and older, but binaries built
2340 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2342 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2343 Contributed by Roland McGrath (Google).
2345 * The header <regexp.h> is deprecated, and will be removed in a future
2346 release. Use of this header will trigger a deprecation warning.
2347 Application developers should update their code to use <regex.h> instead.
2349 This header was formerly part of SUS, but was deprecated in 1994 and
2350 removed from the standard in 2001. Also, the glibc implementation
2351 leaks memory. See BZ#18681 for more details.
2355 * The following bugs are resolved with this release:
2357 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2358 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2359 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2360 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2361 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2362 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2363 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2364 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2365 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2366 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2369 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2370 too little memory for the to-be-scanned arguments and overflow the
2371 allocated buffer. The implementation now correctly computes the required
2372 buffer size when using malloc, and switches to malloc from alloca as
2375 * A new semaphore algorithm has been implemented in generic C code for all
2376 machines. Previous custom assembly implementations of semaphore were
2377 difficult to reason about or ensure that they were safe. The new version
2378 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2379 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2380 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2382 * Port to Altera Nios II has been contributed by Mentor Graphics.
2384 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2385 implementations for powerpc64/powerpc64le.
2386 Implemented by Adhemerval Zanella (IBM).
2388 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2389 and powerpc64le. This may improve lock scaling of existing programs on
2390 HTM capable systems. The lock elision code is only enabled with
2391 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2392 powerpc will issue a transaction abort on every syscall to avoid side
2393 effects being visible outside transactions.
2395 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2396 AArch64. Contributed by ARM Ltd.
2398 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2400 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2401 under certain input conditions resulting in the execution of a shell for
2402 command substitution when the application did not request it. The
2403 implementation now checks WRDE_NOCMD immediately before executing the
2404 shell and returns the error WRDE_CMDSUB as expected.
2406 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2407 processing format strings with a large number of format specifiers.
2409 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2410 infinite loop if the DNS response contained a PTR record of an unexpected
2413 * The minimum GCC version that can be used to build this version of the GNU
2414 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2415 still be used to compile programs using the GNU C Library.
2417 * The GNU C Library is now built with -Werror by default. This can be
2418 disabled by configuring with --disable-werror.
2420 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2422 * The obsolete sigvec function has been removed. This was the original
2423 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2424 programs have been using instead for about 25 years. Of course, ABI
2425 compatibility for old binaries using sigvec remains intact.
2427 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2428 with newer versions of bison.
2430 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2431 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2432 registers overlay two consecutive single-precision registers. MIPS32R2
2433 introduced a new FPU mode (FR=1) where double-precision registers extend the
2434 corresponding single-precision registers which is incompatible with the
2435 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2436 require the use of FR=1 making a transition necessary. New o32 ABI
2437 extensions enable users to migrate over time from the original o32 ABI
2438 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2439 tracks the ABI of any loaded object and verifies that new objects are
2440 compatible. Mode transitions will also be requested as required and
2441 unsupportable objects will be rejected. The ABI checks include both soft and
2442 hard float ABIs for o32, n32 and n64.
2444 GCC 5 with GNU binutils 2.25 onwards:
2445 It is strongly recommended that all o32 system libraries are built using the
2446 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2447 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2448 compiler using --with-fp-32=xx to set this by default.
2452 * The following bugs are resolved with this release:
2454 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2455 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2456 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2457 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2458 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2459 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2460 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2461 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2462 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2463 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2464 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2465 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2466 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2467 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2468 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2470 * Reverted change of ABI data structures for s390 and s390x:
2471 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2472 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2473 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
2474 are preserved pointing straight to the same implementation as the old ones.
2475 Given that, new callers will simply provide a too-big buffer to these
2476 functions. Any applications/libraries out there that embed jmp_buf or
2477 ucontext_t in an ABI-relevant data structure that have already been rebuilt
2478 against 2.19 headers will have to rebuilt again. This is necessary in any
2479 case to revert the breakage in their ABI caused by the glibc change.
2481 * Support for file description locks is added to systems running the
2482 Linux kernel. The standard file locking interfaces are extended to
2483 operate on file descriptions, not file descriptors, via the use of
2484 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
2485 are associated with an open file instead of a process.
2487 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
2489 * The minimum Linux kernel version that this version of the GNU C Library
2490 can be used with is 2.6.32.
2492 * Running the testsuite no longer terminates as soon as a test fails.
2493 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
2494 with PASS or FAIL lines for individual tests. A summary of the results is
2495 printed, including a list of failing lists, and "make check" exits with
2496 error status if there were any unexpected failures. "make check
2497 stop-on-test-failure=y" may be used to keep the old behavior.
2499 * The am33 port, which had not worked for several years, has been removed
2502 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
2503 supported; they now act the same as _DEFAULT_SOURCE (but generate a
2504 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
2505 conflicted with POSIX (support for which was removed in 2.19), the
2506 interfaces those macros enabled remain available when compiling with
2507 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
2508 test macros defined.
2510 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
2512 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
2513 This may improve lock scaling of existing programs on TX capable systems.
2514 The lock elision code is only built with --enable-lock-elision=yes and
2515 then requires a GCC version supporting the TX builtins. With lock elision
2516 default mutexes are elided via __builtin_tbegin, if the cpu supports
2517 transactions. By default lock elision is not enabled and the elision code
2520 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
2521 copy the path argument. This allowed programs to cause posix_spawn to
2522 deference a dangling pointer, or use an unexpected pathname argument if
2523 the string was modified after the posix_spawn_file_actions_addopen
2526 * All supported architectures now use the main glibc sysdeps directory
2527 instead of some being in a separate "ports" directory (which was
2528 distributed separately before glibc 2.17).
2530 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
2531 On configurations that support it (all Linux configurations), it's now
2532 used regardless of the --enable-add-ons switch to configure. It is no
2533 longer possible to build such configurations without pthreads support.
2535 * Locale names, including those obtained from environment variables (LANG
2536 and the LC_* variables), are more tightly checked for proper syntax.
2537 setlocale will now fail (with EINVAL) for locale names that are overly
2538 long, contain slashes without starting with a slash, or contain ".." path
2539 components. (CVE-2014-0475) Previously, some valid locale names were
2540 silently replaced with the "C" locale when running in AT_SECURE mode
2541 (e.g., in a SUID program). This is no longer necessary because of the
2544 * On x86-64, the dynamic linker's lazy-binding support is now compatible
2545 with application code using Intel MPX instructions. (With all previous
2546 versions, the MPX register state could be clobbered when making calls
2547 into or out of a shared library.) Note that while the new dynamic
2548 linker is compatible with all known x86 hardware whether or not it
2549 supports Intel MPX, some x86 instruction-set emulators might fail to
2550 handle the new instruction encodings. This is known to affect Valgrind
2551 versions up through 3.9 (but will be fixed in the forthcoming 3.10
2552 release), and might affect other tools that do instruction emulation.
2554 * Support for loadable gconv transliteration modules has been removed.
2555 The support for transliteration modules has been non-functional for
2556 over a decade, and the removal is prompted by security defects. The
2557 normal gconv conversion modules are still supported. Transliteration
2558 with //TRANSLIT is still possible, and the //IGNORE specifier
2559 continues to be supported. (CVE-2014-5119)
2561 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
2562 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
2563 resulting a denial-of-service security vulnerability in applications which
2564 use functions related to iconv. (CVE-2014-6040)
2568 * The following bugs are resolved with this release:
2570 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
2571 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
2572 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
2573 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
2574 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
2575 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
2576 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
2577 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
2578 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
2579 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
2580 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
2581 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
2582 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
2583 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
2584 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
2585 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
2586 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
2587 16431, 16453, 16474, 16506, 16510, 16529
2589 * Slovenian translations for glibc messages have been contributed by the
2590 Translation Project's Slovenian team of translators.
2592 * The public headers no longer use __unused nor __block. This change is to
2593 support compiling programs that are derived from BSD sources and use
2594 __unused internally, and to support compiling with Clang's -fblock
2595 extension which uses __block.
2597 * CVE-2012-4412 The strcoll implementation caches indices and rules for
2598 large collation sequences to optimize multiple passes. This cache
2599 computation may overflow for large collation sequences and may cause a
2600 stack or buffer overflow. This is now fixed to use a slower algorithm
2601 which does not use a cache if there is an integer overflow.
2603 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
2604 rules for large collation sequences to optimize multiple passes and falls
2605 back to alloca if malloc fails, resulting in a possible stack overflow.
2606 The implementation now falls back to an uncached collation sequence lookup
2609 * CVE-2013-4788 The pointer guard used for pointer mangling was not
2610 initialized for static applications resulting in the security feature
2611 being disabled. The pointer guard is now correctly initialized to a
2612 random value for static applications. Existing static applications need
2613 to be recompiled to take advantage of the fix (bug 15754).
2615 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
2616 to the d_name member of struct dirent, or omit the terminating NUL
2617 character. (Bugzilla #14699).
2619 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
2620 aligned_alloc functions could allocate too few bytes or corrupt the
2621 heap when passed very large allocation size values (Bugzilla #15855,
2624 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
2625 for AF_INET6 has been fixed (Bugzilla #16072).
2627 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
2628 pap_CW, quz_PE, the_NP.
2630 * Substantially revised locales: gd_GB, ht_HT
2632 * The LC_ADDRESS field was updated to support country_car for almost all
2635 * ISO 1427 definitions were updated.
2637 * ISO 3166 definitions were updated.
2639 * The localedef utility now supports --big-endian and --little-endian
2640 command-line options to generate locales for a different system from that
2641 for which the C library was built.
2643 * Binary locale files now only depend on the endianness of the system for
2644 which they are generated and not on other properties of that system. As a
2645 consequence, binary files generated with new localedef may be incompatible
2646 with old versions of the GNU C Library, and binary files generated with
2647 old localedef may be incompatible with this version of the GNU C Library,
2648 in the following circumstances:
2650 + Locale files may be incompatible on m68k systems.
2652 + Locale archive files (but not separate files for individual locales) may
2653 be incompatible on systems where plain "char" is signed.
2655 * The configure option --disable-versioning has been removed. Builds with
2656 --disable-versioning had not worked for several years.
2658 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
2659 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
2661 * SystemTap probes for malloc have been introduced.
2663 * SystemTap probes for slow multiple precision fallback paths of
2664 transcendental functions have been introduced.
2666 * Support for powerpc64le has been added.
2668 * The soft-float powerpc port now supports e500 processors.
2670 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
2672 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
2673 set of header declarations that are enabled by default, even when other
2674 feature test macros or compiler options such as -std=c99 would otherwise
2675 disable some of those declarations.
2677 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
2678 conflict with POSIX. The libbsd-compat library (which was a dummy library
2679 that did nothing) has also been removed.
2681 * Preliminary documentation about Multi-Thread, Async-Signal and
2682 Async-Cancel Safety has been added.
2684 * Change of ABI data structures for s390 and s390x:
2685 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
2686 allow for future hardware extensions. All library functions that accept or
2687 return these structures were versioned in order to provide backwards
2688 compatibility with existing code. However, not all cases can be handled
2689 with interface versioning. If an application embeds either structure into
2690 another structure and that structure is passed to another compilation unit
2691 which expects the newer larger-sized object then any access to the new
2692 fields will result in undefined behaviour. Similarly any access to fields
2693 that were moved by the enlarging of the structures will cause undefined
2694 behaviour. To fix the undefined behaviour all objects that are part of the
2695 final in-memory image must agree on the size of structures, and this may
2696 require recompilation.
2700 * The following bugs are resolved with this release:
2702 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
2703 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
2704 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
2705 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
2706 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
2707 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
2708 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
2709 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
2710 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
2711 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
2712 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
2713 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
2714 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
2717 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
2718 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
2719 Distributions can re-enable building and using pt_chown via the new configure
2720 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
2721 considerable security risks and should only be used if the distribution
2722 understands and accepts the risks.
2724 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
2727 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
2728 fixed (Bugzilla #15330).
2730 * Add support for calling C++11 thread_local object destructors on thread
2731 and program exit. This needs compiler support for offloading C++11
2732 destructor calls to glibc.
2734 * Improved worst case performance of libm functions with double inputs and
2737 * Support for priority inherited mutexes in pthread condition variables on
2738 non-x86 architectures.
2740 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
2742 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
2744 * Optimized string functions for ARM. Implemented by Will Newton and
2747 * Optimized libm functions for SPARC. Implemented by David S. Miller.
2749 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
2752 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
2753 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
2755 * Added a benchmark framework to track performance of functions in glibc.
2757 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
2758 It is based on draft TS 18661 and currently enabled as a GNU extension.
2760 * On Linux, the clock function now uses the clock_gettime system call
2761 for improved precision, rather than old times system call.
2763 * Added support for version-3 tz format files. This is needed when using
2764 the tz database release 2013e or later, and affects a few unusual cases --
2765 currently only TZ='America/Godthab' for time stamps after 2037.
2767 * Added new API functions pthread_getattr_default_np and
2768 pthread_setattr_default_np to get and set the default pthread
2769 attributes of a process.
2771 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
2772 This may improve lock scaling of existing programs on TSX capable systems.
2773 When the --enable-lock-elision=yes parameter is specified at configure
2774 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2777 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2778 availability). Implemented by Ryan S. Arnold.
2780 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2784 * The following bugs are resolved with this release:
2786 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2787 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2788 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2789 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2790 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2791 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2792 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2793 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2794 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2795 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2796 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2797 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2798 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2799 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2800 14879, 14889, 14893, 14898, 14914.
2802 * Optimization of memcpy for MIPS.
2804 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2805 EMFILE has been fixed (Bugzilla #14889).
2807 * The add-on ports collection is now distributed in the "ports" subdirectory
2808 of the main GNU C Library distribution, rather than separately.
2810 * Port to ARM AArch64 contributed by Linaro.
2812 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2813 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2815 Implemented by Andreas Krebbel.
2817 * The new function secure_getenv allows secure access to the environment,
2818 returning NULL if running in a SUID/SGID process. This function replaces
2819 the internal function __secure_getenv.
2821 * SystemTap static probes have been added into the dynamic linker.
2822 Implemented by Gary Benson.
2824 * Optimizations of string functions strstr, strcasestr and memmem.
2825 Implemented by Maxim Kuvyrkov.
2827 * The minimum Linux kernel version that this version of the GNU C Library
2828 can be used with is 2.6.16.
2830 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2831 powerpc POWER7. Implemented by Will Schmidt.
2833 * New configure option --disable-nscd builds the C library such that it
2834 never attempts to contact the Name Service Caching Daemon (nscd).
2835 New configure option --disable-build-nscd avoids building nscd itself;
2836 this is the default if --disable-nscd is used.
2838 * Improved support for cross-compilation, including cross-testing and
2839 bootstrap builds without a previously built glibc.
2841 * Several testsuite tests are now able to test multiple IFUNC variants of an
2842 interface, rather than just testing the one that would be chooen by
2845 * New configure options --with-bugurl and --with-pkgversion, for
2846 distributors to use to embed their bug-reporting and package version
2847 information in --help and --version output.
2849 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2850 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2851 allows creation of chroots without the procfs mounted on /proc.
2853 * The `crypt' function now fails if passed salt bytes that violate the
2854 specification for those values. On Linux, the `crypt' function will
2855 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2856 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2857 when the mode is enabled.
2859 * The `clock_*' suite of functions (declared in <time.h>) is now available
2860 directly in the main C library. Previously it was necessary to link with
2861 -lrt to use these functions. This change has the effect that a
2862 single-threaded program that uses a function such as `clock_gettime' (and
2863 is not linked with -lrt) will no longer implicitly load the pthreads
2864 library at runtime and so will not suffer the overheads associated with
2865 multi-thread support in other code such as the C++ runtime library.
2867 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2872 * The following bugs are resolved with this release:
2874 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2875 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2876 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2877 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2878 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2879 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2880 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2881 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2882 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2883 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2884 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2885 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2886 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2887 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2888 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2889 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2890 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2891 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2892 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2893 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2894 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2895 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2898 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2899 configuring glibc with:
2900 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2901 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2902 Implemented by H.J. Lu.
2906 + define static_assert
2908 + do not declare gets
2910 + declare at_quick_exit and quick_exit also for ISO C11
2912 + aligned_alloc. NB: The code is deliberately allows the size parameter
2913 to not be a multiple of the alignment. This is a moronic requirement
2914 in the standard but it is only a requirement on the caller, not the
2917 + timespec_get added
2919 + uchar.h support added
2921 + CMPLX, CMPLXF, CMPLXL added
2923 Implemented by Ulrich Drepper.
2925 * Support for the IA-64 has been moved to ports.
2927 * Remove support for anything but ELF binary format
2929 * Checking versions of poll, ppoll added.
2930 Implemented by Ulrich Drepper.
2932 * More generic and 64-bit performance optimizations to math functions.
2933 Implemented by Ulrich Drepper.
2935 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2936 headers and functions available at compile time as they were before
2937 version 2.14. This option will be removed at some time in the future
2938 after the TI-RPC library becomes fully sufficient for the needs of
2939 existing applications.
2941 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2942 Note that glibc is not expected to work with any Linux kernel version
2945 * New header <sys/auxv.h> and function getauxval allowing easy access to
2946 the AT_* key-value pairs passed from the Linux kernel. The header also
2947 defines the HWCAP_* bits associated with the AT_HWCAP key.
2949 * New locales: mag_IN
2951 * New configure option --enable-systemtap builds SystemTap static probes
2952 into libc for setjmp and longjmp and into libpthread for various operations.
2953 So far the setjmp/longjmp probes and some of the libpthread probes are
2954 provided only for i*86 and x86_64.
2955 Implemented by Roland McGrath and Rayson Ho.
2957 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2959 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2962 * More optimized functions for SPARC. Implemented by David S. Miller.
2964 * Improved support for cross-compilation, especially bootstrap builds
2965 without a previously built glibc.
2967 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2968 Chris Metcalf from Tilera.
2970 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2971 now supported for ARM processors.
2973 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2974 as the name of the dynamic linker, to distinguish it from the
2975 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2977 * Support for CRIS has been removed from ports.
2979 * A new class of installed header has been documented for low-level
2980 platform-specific functionality. PowerPC added the first instance with a
2981 function to provide time base register access. Contributed by Tulio
2982 Magno Quites Machado Filho.
2984 * ix86 configurations now install header files that are consistent with
2985 what x86-64 configurations install. These same header files can be used
2986 for -m32, -m64, or -mx32 builds.
2987 Contributed by H.J. Lu.
2989 * Math library bug fixes. A thorough audit of all open math library bugs was
2990 conducted by Joseph Myers. Significant progress was made on many math
2991 library bugs resulting in more accurate exceptions and function results.
2992 Many thanks to all those that contributed including Andreas Jaeger for his
2993 patch review and work on the x87 trigonometric instruction issues.
2995 * Timezone data is no longer installed. Timezone-related binaries and scripts
2996 will continue to be installed. Users should obtain their timezone data from
2997 their distribution provider or from the tzdata package at
2998 <ftp://munnari.oz.au/pub/>.
3002 * The following bugs are resolved with this release:
3004 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3005 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3006 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3007 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3008 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3009 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3010 13484, 13506, 13515, 13523, 13524, 13538, 13540
3012 * New program pldd to list loaded object of a process
3013 Implemented by Ulrich Drepper.
3015 * Add nss_db support back to glibc. No more dependency on Berkeley db
3016 and support for initgroups lookups.
3017 Implemented by Ulrich Drepper.
3019 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3020 Contributed by HJ Lu.
3022 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3023 Contributed by HJ Lu.
3025 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3026 on x86-32 and x86-64.
3027 Contributed by Liubov Dmitrieva.
3029 * Optimized strchr and strrchr for SSE on x86-32.
3030 Contributed by Liubov Dmitrieva.
3032 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3033 for x86-64 and x86-32.
3034 Contributed by Liubov Dmitrieva.
3036 * New interfaces: scandirat, scandirat64
3037 Implemented by Ulrich Drepper.
3039 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3040 Implemented by Ulrich Drepper.
3042 * nscd now also caches the netgroup database.
3043 Implemented by Ulrich Drepper.
3045 * Integrate libm with gcc's -ffinite-math-only option.
3046 Implemented by Ulrich Drepper.
3048 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3049 to math functions. Implemented by Ulrich Drepper.
3051 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3052 Implemented by Ulrich Drepper.
3054 * New Linux interfaces: process_vm_readv, process_vm_writev
3056 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3057 Implemented by Ulrich Drepper.
3059 * Optimized nearbyint and strcasecmp for PPC.
3060 Implemented by Adhemerval Zanella.
3062 * New locales: bho_IN, unm_US, es_CU, ta_LK
3066 * The following bugs are resolved with this release:
3068 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3069 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3070 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3071 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3072 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3073 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3074 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3075 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3076 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3077 12795, 12811, 12813, 12814, 12841
3079 * The RPC implementation in libc is obsoleted. Old programs keep working
3080 but new programs cannot be linked with the routines in libc anymore.
3081 Programs in need of RPC functionality must be linked against TI-RPC.
3082 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3084 Visible changes of this change include (obviously) the inability to link
3085 programs using RPC functions without referencing the TI-RPC library and the
3086 removal of the RPC headers from the glibc headers.
3087 Implemented by Ulrich Drepper.
3089 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3090 syncfs, setns, sendmmsg
3092 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3093 yue_HK, lij_IT, mhr_RU
3095 * New encodings: CP770, CP771, CP772, CP773, CP774
3097 * New program sotruss to trace calls through PLTs
3098 Implemented by Ulrich Drepper.
3100 * The malloc hook implementation is marked deprecated and will be removed
3101 from the default implementation in the next version. The design never
3102 worked ever since the introduction of threads. Even programs which do
3103 not create threads themselves can use multiple threads created internally.
3107 * The following bugs are resolved with this release:
3109 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3110 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3111 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3112 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3115 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3117 * POWER7 optimizations: memset, memcmp, strncmp
3119 * New optimized string functions for x86-64: strnlen (SSE2),
3120 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3121 Implemented by Ulrich Drepper.
3125 * The following bugs are resolved with this release:
3127 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3128 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3129 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3130 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3131 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3132 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3133 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3134 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3136 * New interfaces: pthread_getname_np, pthread_setname_np
3138 * New Linux interface: recvmmsg
3140 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3142 * The dynamic linker now recognizes supported ABI versions from the
3143 EI_ABIVERSION field in the ELF header.
3144 Implemented by Ulrich Drepper.
3146 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3147 will not be used to fill in password fields in the passwd.byname replies.
3148 Instead it is used to synthesize the shadow.byname table, should it be
3149 missing. This is a useful mode in some installations involving Solaris.
3150 Implemented by Ulrich Drepper.
3152 * New locales: kok_IN, sq_MK, cv_RU
3156 * The following bugs are resolved with this release:
3158 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3159 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3160 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3161 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3162 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3163 10789, 10817, 10823, 10840, 10847
3165 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3167 Implemented by Ulrich Drepper.
3169 * Checking version of longjmp added that fails if an uninitialized stack
3170 frame would be created. Implemented by Ulrich Drepper.
3172 * STT_GNU_IFUNC is now supported in static executables.
3173 Implemented by H.J. Lu.
3175 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3177 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3178 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3179 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3180 Contributed by H.J. Lu.
3182 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3183 Implemented by Ulrich Drepper.
3185 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3187 Contributed by H.J. Lu.
3189 * Support for fma instruction in AVX on x86-64.
3190 Implemented by H.J. Lu and Ulrich Drepper.
3192 * AVX support in x86-64 auditing support in ld.so.
3193 Implemented by H.J. Lu.
3195 * STB_GNU_UNIQUE support added.
3196 Implemented by Ulrich Drepper.
3198 * Implement second fallback mode for optimized DNS lookup for even more
3199 broken environments. If two requests from the same port are not
3200 handled correctly close the socket and open a new one before sending
3201 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3202 can be used to select this mode right away, instead of rediscovering the
3203 necessity is every process again.
3204 Implemented by Ulrich Drepper.
3206 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3207 Implemented by Adam Tkac.
3209 * Optimized iconv conversions for S390x.
3210 Implemented by Andreas Krebbel.
3212 * Using condvars with PI mutexes is now more efficient due to kernel
3213 support for requeueing to PI futexes. NPTL support added for x86-64.
3214 Implemented by Ulrich Drepper.
3216 * New locales: ps_AF, my_MM
3220 * The following bugs are resolved with this release:
3222 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3223 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3224 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3225 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3226 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3228 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3229 Implemented by Ulrich Drepper.
3231 * New Linux interfaces: accept4, fallocate, fallocate64.
3232 Implemented by Ulrich Drepper.
3234 * Correct declarations of string function when used in C++ code. This
3235 could lead to compile errors for invalid C++ code.
3237 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3240 * New POSIX 2008 interface: psiginfo
3241 Implemented by Ulrich Drepper.
3243 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3244 Implemented by Ulrich Drepper.
3246 * Support for selecting between multiple function definitions at runtime
3247 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3249 * The libcrypt library can now use the hash function implementations in
3250 NSS. Implemented by Ulrich Drepper.
3252 * The malloc implementation can be compiled to be less memory efficient
3253 but higher performing in multi-threaded programs.
3254 Implemented by Ulrich Drepper.
3256 * New locales: nan_TW@latin, ks_IN
3258 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3259 Implemented by Ulrich Drepper.
3261 * Extended printf hook support. It is possible to use user-defined types
3262 and extend existing format specifiers.
3263 Implemented by Ulrich Drepper.
3265 * Handling for group shadow files has been added.
3266 Implemented by Ulrich Drepper.
3268 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3269 servers (the case, e.g., for some people using the built-in DNS
3270 server in ADSL modems/routers). There is a once-per-process timeout
3271 in case of a broken server. To avoid it, users can run nscd or put
3272 'options single-request' in /etc/resolv.conf.
3273 Implemented by Ulrich Drepper.
3277 * The following bugs are resolved with this release:
3279 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3280 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3281 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3282 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3283 6968, 6974, 6980, 6995, 7008, 7009, 7029
3285 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3286 up at the same time. Implemented by Ulrich Drepper.
3288 * TLS descriptors for LD and GD on x86 and x86-64.
3289 Implemented by Alexandre Oliva.
3291 * getaddrinfo now handles DCCP and UDPlite.
3292 Implemented by Ulrich Drepper.
3294 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3295 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3296 Implemented by Ulrich Drepper.
3298 * New implementation of memmem, strstr, and strcasestr which is O(n).
3299 Implemented by Eric Blake.
3301 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3303 * Implement "e" option for popen to open file descriptor with the
3304 close-on-exec flag set. Implemented by Ulrich Drepper.
3306 * Implement "b" mode for fmemopen. In this mode writes writes don't
3307 implicitly add a NUL byte and seeks from the end of the buffer really
3308 use the buffer end, not the string length as the basis.
3309 Implemented by Ulrich Drepper.
3311 * Many functions, exported and internal, now atomically set the close-on-exec
3312 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3314 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3316 Implemented by Pravin Satpute.
3318 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3322 * The following bugs are resolved with this release:
3324 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3325 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3326 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3327 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3328 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3329 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3330 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3332 * New locales: bo_CN, bo_IN, shs_CA.
3334 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3336 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3337 Implemented by Pravin Satpute.
3339 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3341 * nscd caches now all timeouts for DNS entries
3342 Implemented by Ulrich Drepper.
3344 * nscd is more efficient and wakes up less often.
3345 Implemented by Ulrich Drepper.
3347 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3348 vdprintf, and obstack_vprintf.
3349 Implemented by Jakub Jelinek.
3351 * Faster memset for x86-64.
3352 Implemented by Harsha Jagasia and H.J. Lu.
3354 * Faster memcpy on x86.
3355 Implemented by Ulrich Drepper.
3357 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3358 Implemented by Ulrich Drepper.
3360 * Faster sqrt and sqrtf implemention for some PPC variants.
3361 Implemented by Steven Munroe.
3365 * The following bugs are resolved with this release:
3367 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3368 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3369 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3370 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3371 5071, 5103, 5104, 5112, 5113, 5184, 5186
3373 * More checking functions: fread, fread_unlocked, open*, mq_open.
3374 Implemented by Jakub Jelinek and Ulrich Drepper.
3376 * Extend fortification to C++. Implemented by Jakub Jelinek.
3378 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3379 by not recognizing 'a' as a modifier when those specs are requested.
3380 Implemented by Jakub Jelinek.
3382 * PPC optimizations to math and string functions.
3383 Implemented by Steven Munroe.
3385 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3386 options to be passed. Implemented by Ulrich Drepper.
3388 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3390 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3391 Implemented by Ulrich Drepper.
3393 * Handle private futexes in the NPTL implementation.
3394 Implemented by Jakub Jelinek and Ulrich Drepper.
3396 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3397 Implemented by Roland McGrath and Ulrich Drepper.
3399 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3401 * SHA-256 and SHA-512 based password encryption.
3402 Implemented by Ulrich Drepper.
3404 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3405 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3408 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3409 Implemented by Ulrich Drepper.
3413 * The following bugs are resolved with this release:
3415 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3416 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3417 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3418 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3419 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3420 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3421 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3424 * New Linux interfaces: epoll_pwait, sched_getcpu.
3426 * New generic interfaces: strerror_l.
3428 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3432 * The following bugs are resolved with this release:
3434 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3435 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3436 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3437 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3438 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3439 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3440 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3441 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3442 3225, 3251, 3252, 3253, 3273
3444 * For Linux, the sorting of addresses returned by getaddrinfo now also
3445 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3446 Implemented by Ulrich Drepper.
3448 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3449 Implemented by Ulrich Drepper.
3451 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3453 * New iconv module for MIK. Contributed by Alexander Shopov.
3455 * For sites with broken group and/or passwd database, the auto-propagate
3456 option of nscd can prevent creating ID lookup entries from the results
3457 of a name lookup and vice versa. This usually is no problem but some
3458 site might have problems with the default behavior.
3459 Implemented by Ulrich Drepper.
3461 * Iterating over entire database in NIS can be slow. With the
3462 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3463 to trade time for memory. The entire database will be read at once.
3464 Implemented by Ulrich Drepper.
3466 * The interfaces introduced in RFC 3542 have been implemented by
3469 * Support for the new ELF hash table format was added by Ulrich Drepper.
3471 * Support for priority inheritance mutexes added by Jakub Jelinek and
3474 * Support for priority protected mutexes added by Jakub Jelinek.
3476 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
3477 or_IN, csb_PL, fy_NL, sr_ME.
3481 * More overflow detection functions.
3483 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
3484 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
3486 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
3487 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
3488 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
3489 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
3490 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
3491 by Masahide Washizawa.
3493 * It is now possible to install audit libraries for the dynamic linker using
3494 LD_AUDIT. Implemented by Ulrich Drepper.
3496 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
3497 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
3498 For a libc and libpthread that works well on Linux 2.4 kernels, we
3499 recommend using the stable 2.3 branch.
3501 * The new function open_wmemstream acts like open_memstream,
3502 but uses a wchar_t wide character buffer.
3504 * The new function ppoll is an improved version of poll, similar to pselect.
3506 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
3507 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
3508 renameat, unlinkat, linkat, symlinkat, readlinkat.
3510 * New Linux kernel system calls: unshare,
3511 inotify_init, inotify_add_watch, inotify_rm_watch.
3513 * The euidaccess function is now also known by the alias eaccess,
3514 for compatibility with some other systems.
3516 * Timezone data updated to 2006b version.
3520 * The following bugs are resolved with this release:
3522 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
3523 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
3524 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
3525 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
3526 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
3527 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
3529 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3531 * As of this release, GCC 4 can be used to compile the C Library.
3533 * Timezone data updated to 2005m version.
3537 * The following bugs are resolved with this release:
3539 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
3540 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
3541 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
3542 777, 787, 821, 822, 823, 825
3544 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3548 * Support for RFC 3678. Real implementations exist only for Linux so far.
3549 Implemented by Ulrich Drepper.
3551 * nscd can now cache entries persistently. Expiring entries are reloaded.
3552 For speedups the cache can be shared in memory with client processes.
3553 Implemented by Ulrich Drepper.
3555 * nscd can now perform SELinux checks.
3556 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
3558 * getaddrinfo queries are now cached. Canonical name lookup is performed
3560 Implemented by Ulrich Drepper.
3562 * The nothrow function attribute is used when headers are used by gcc when
3563 compiling C code. This can avoid significant amounts of exception
3566 * The malloc functions perform more error checking and are stricter when
3567 it comes to reacting on errors. The default action is to terminate
3568 the process after showing an error message. Implemented by Ulrich Drepper.
3570 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
3571 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
3573 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
3574 namespaces using the new function dlmopen(). This feature is of course,
3575 like most other dynamic loading functionality, not available in statically
3576 linked applications. Implemented by Ulrich Drepper.
3578 * Low-overhead boundary checking variants of string and some stdio functions
3579 were added. These are to be used in conjunction with a gcc patch by
3580 Jakub Jelinek which adds calls to these functions if possible.
3581 Implemented by Jakub Jelinek and Ulrich Drepper.
3583 * Old code for several operating systems and machine architectures that
3584 have not been in working condition in a long time have been removed from
3585 the main source tree maintained by the GNU C Library's maintainers.
3586 These files are now reside in the separate `ports' source module
3587 that is usable as an add-on when building the library.
3591 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
3592 interrogate the dynamic linker, compatible with the Solaris interface.
3594 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
3595 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
3597 * getifaddrs now uses the netlink interface on Linux to get its information.
3598 Implemented by Thorsten Kukuk.
3600 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
3601 Implemented by Ulrich Drepper.
3603 * support for non-executable stacks on x86 has been added. Changes mostly
3606 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
3609 * getaddrinfo now performs destination address selection according to
3614 * Thread-safe interfaces for many functions that access locale data
3615 were added in version 2.3, but these features were omitted from NEWS.
3616 Many functions have variants with an `_l' suffix that take a `locale_t'
3617 object as a parameter rather than consulting the current locale.
3618 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
3619 create and maintain `locale_t' objects. Additionally, the new function
3620 `uselocale' sets "the current locale" (as used by functions not so
3621 parameterized) set for an individual thread. These features were added
3622 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
3624 * The functions getresuid, getresgid, setresuid, and setresgid, which
3625 have long been available on Linux, are now declared in <unistd.h>
3626 and are now also available on the Hurd.
3628 * ELF thread-local storage support (TLS) now works on x86-64.
3630 * The new dynamic string token $LIB is expanded in shared library names.
3631 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
3633 * Aldy Hernandez contributed complete software floating point support for
3634 PowerPC machines with no FPU.
3636 * fexecve is implemented on Linux.
3638 * The `btowc' function should work at least twice as fast due to
3639 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
3641 * With approriate thread add-ons cancelable functions are now implemented
3642 in libc.so as well. No need to call the function in libpthread. This
3643 change allowed to finally disable the incorrect and expensive handling
3644 of weak definition in ld.so.
3646 * Yet more PLT entries in libc.so have been removed. We finally arrived
3647 at the bare minimum. Startup times improved appropriately.
3649 * Support for the new Linux/x86 system call interface was added. The
3650 AT_SYSINFO auxiliary vector entry is recognized and handled.
3654 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
3657 * iconv (the program and the interface) now accepts empty names (excluding
3658 options like //TRANSLIT) to mean "use charset of current locale".
3660 * localedef can now transliterate characters in strings which are not in
3661 the provided charmap. The information from the input locale is used.
3663 * Prelinking support was added for ELF targets. This requires additional
3664 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
3666 * Read-only stdio streams now use mmap to speed up operation by eliminating
3667 copying and buffer underflows. To use add 'm' to the mode string of
3668 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
3670 * The malloc functions were completely rewritten by Wolfram Gloger based
3671 on Doug Lea's malloc-2.7.0.c.
3673 * Isamu Hasegawa contributed a completely new and POSIX-conformant
3674 implementation of regex.
3676 * Bruno Haible upgraded the iconv and locale implementation to support
3679 * Contents of the LC_* and LANG environment variables in the CEN style are
3680 not recognized anymore. It never was used. Change by Ulrich Drepper.
3682 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
3683 thread-local storage (TLS) ABI on some platforms.
3684 Changes by Ulrich Drepper. SH support by Kaz Kojima.
3686 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
3687 EUC-JISX0213, and TSCII.
3689 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
3690 BSD-compatible interface for getting all network interface addresses.
3691 Implementation for IPv4 by Roland McGrath.
3693 * Loading of locale data is faster due to the introduction of a locale
3694 archive. Implemented by Roland McGrath and Ulrich Drepper.
3696 * Startup times are significantly reduced by not using exported functions
3697 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
3700 * Steven Munroe contributed a port to PowerPC64/Linux.
3704 * The Hurd now uses the GNU libio implementation of stdio rather than the
3705 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
3707 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
3708 with the same behavior as the Linux system call of the same name.
3712 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
3713 128-bit long double format.
3715 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
3716 IBM1161, and IBM1162 charsets.
3718 * Andreas Jaeger contributed a port to x86-64/Linux.
3720 * Peter Bruin contributed a port to PowerPC/Hurd.
3722 * libc functions using I/O streams now can handle wide-oriented streams
3725 * optimizations in the dynamic linker. Binaries created by recent binutils
3726 versions start up quicker due to reduced time spent on relocations.
3728 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
3732 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
3733 asinh, atanh, j0 for the 128-bit long double format.
3735 * Bruno Haible updated all the code handling Unicode in some form to
3736 support Unicode 3.1.
3738 * Speed of regex for single-byte locales is back to previous levels.
3739 Patch by Isamu Hasegawa.
3741 * Alpha, SPARC, and IA-64 now also using floating stacks.
3743 * Startup time of internationalized applications greatly improved through
3744 iconv cache. Use iconvconfig to generate the cache file.
3745 Contributed by Ulrich Drepper.
3747 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
3748 severe performance problems. Patch by David Mosberger.
3750 * The Hurd port got a lot more functionality like AIO, various stdio
3751 extensions, etc. Mainly done by Roland McGrath.
3753 * mtrace can now lookup symbols in shared libraries.
3757 * Intel's IA-64 math library is largely integrated. It provides fast and
3758 accurate implementatations for most basic and standard math functions
3759 in float, double, and long double format.
3761 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
3762 and asin for the 96-bit long double format and asin, log, tan for the
3763 128-bit long double format.
3765 * The beginning of a last-bit accurate math library by IBM Haifa were added.
3766 The basic double functions exist today. Contributed by Abraham Ziv
3767 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
3768 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
3770 * An asynchronous name lookup library was added. The interface is designed
3771 after POSIX AIO. The proposal was circulated beforehand to get comments.
3772 No negative ones came in. Implemented by Ulrich Drepper.
3774 * Port to S390/64bit contributed by Martin Schwidefsky
3775 <schwidefsky@de.ibm.com>.
3777 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3778 of functions for Linux/IA-64.
3780 * The RPC code is now thread safe. Threads can now use the same service
3781 of different services at the same time. Patch by Eric Norum
3782 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3784 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3785 family of functions for Linux/S390.
3787 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3788 of functions for Linux/x86.
3790 * Port to Linux/CRIS contributed by Axis Communications.
3794 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3795 we can now check for namespace violations and missing declarations. The
3796 result is that almost all headers are now Unix-compliant (as defined in
3797 the upcoming XPG6). The negative side is that some programs might need
3798 corrections, too, if they depend on the incorrect form of the headers in
3799 previous versions which defined too many symbols and included too many
3802 * regex now handles multibyte character sets correctly.
3803 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3805 * iconv (the program) does now conform to the upcoming XPG6 and handles
3806 charmaps. Instead of the charset names the path of charmaps can be
3807 provided and the conversion happens based on this data.
3808 Contributed by Ulrich Drepper.
3810 * The locale program now provides detailed information about the installed
3815 only lists the names of the supported locales
3819 provides details such as country, language, and codeset name.
3820 Contributed by Ulrich Drepper.
3824 * The gencat program now parses the input file according to the charset
3825 selected by the LC_CTYPE category. This is important for stateful
3826 character sets. To make generating catalogs easier there is a way
3827 to overwrite the charset selected by the locale: before the first
3828 message or $ quote line the catalog can contain a line like
3830 $ codeset=ISO-8859-2
3832 to select the charset (ISO-8859-2 in this case).
3834 Implemented by Shinya Hanataka and Ulrich Drepper.
3836 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3837 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3838 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3840 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3841 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3843 * The LANGUAGE environment variable is now ignored unless the locale is
3844 changed from the default "C" locale.
3846 * The usual bug fixes.
3850 * Greg McGary added runtime support for bounds checking using gcc's
3851 new -fbounded-pointers option. ix86 target is complete. PowerPC
3854 * Thorsten Kukuk added secure mode support to nscd.
3856 * The Berkeley db libraries have been removed.
3858 Related, the nss_db module is now in a separate package since it
3859 obviously requires a database library being available.
3861 * Wide character I/O streams implemented by Ulrich Drepper.
3863 * Functions from the extended socket API added by Ulrich Drepper.
3865 * Functions feenableexcept and fedisableexcept to control the
3866 behaviour of individual exceptions have been added by Andreas Jaeger.
3868 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3870 * The resolver code has been updated from bind 8.2.3-T5B which supports
3871 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3874 This change could in some situations effect backward compatibility. Since
3875 now `_res' is a thread-local instead of a global variable, modifying it
3876 in one thread does not have any effect in other threads.
3878 The resolver library was also extended to allow IPv6 as the transport
3879 protocol for the requests. This work was done by Stig Venaas.
3881 * Compatibility code for K&R C compilers has been removed from the
3882 header files. A ISO C compiler is needed to use the library
3883 (conforming to either C89 or C99 standard).
3885 * Complete rewrite of the localedef program to support multibyte character
3886 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3887 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3888 Implemented by Ulrich Drepper.
3890 Bruno Haible significantly improved the generation and use of the data
3891 structures for the wide character tables.
3893 * Plural handling in gettext implemented by Ulrich Drepper.
3895 * The utmp daemon has been removed.
3897 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3899 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3902 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3904 * POSIX barriers implemented by Kaz Kylheku.
3906 * POSIX spawn function family implemented by Ulrich Drepper.
3908 * POSIX spinlocks are now available.
3910 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3912 * the configure option --enable-kernel=X.Y.Z allows to strip out
3913 compatibility for kernel versions before X.Y.Z. This is currently only
3914 implemented for Linux.
3916 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3917 field sin6_scope_id. This means that all programs using IPv6 should be
3918 recompiled. Don't expect binary compatibility with previous glibc
3921 * various conversion modules for IBM character sets contributed by
3924 * IA-64 port by Jes Sorensen and HJ Lu.
3938 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3940 * New xdr functions are added; some rpc functions are now 64bit clean.
3942 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3944 * Fixed known incompatibilities with glibc 2.0.
3946 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3948 * Optimized a number of functions (especially the ELF dynamic loader).
3950 * Update timezone data files.
3952 * lots of charmaps corrections
3954 * some new locale definitions and charmaps
3959 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3960 conform to POSIX member type requirements. Symbol versions have been
3961 adjusted as needed within the library, and for direct use by applications,
3962 but there is potential for problems if third-party libraries use
3963 struct timeval as part of their interface. This does not present
3964 a problem for X and other "essential" system libraries.
3966 * An additional locale model to support C++ Standard Library locale
3967 model and probably more was implemented by Ulrich Drepper.
3969 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3972 * Miles Bader provided the `argp' function family to support hierachical
3973 command line argument parsing, layered on top of getopt.
3975 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3977 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3980 * scanf recognizes the %a and %A format for scanning floating point numbers.
3982 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3983 information and interfaces for the available integer types.
3985 * about 130 new math functions were added to implement the ISO C9x math
3988 * the new header <complex.h> contains definitions of the complex math
3989 functions from ISO C 9X.
3991 * the new header <tgmath.h> defines generic macros to use complex or
3992 real valued functions.
3994 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3996 * Andreas Jaeger provided a test suite for the math library.
3998 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4000 * Ulrich Drepper added character set conversion functions (iconv).
4002 * Optimized string functions have been added.
4004 * The localedata addon is now part of glibc.
4006 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4008 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4009 daemon for NSS (nscd).
4011 Missing a better place here are some numbers on improvements. Under
4012 Linux 2.1.125 un-tar-ing the kernel sources takes
4016 using local files 12.19s 6.88s 22.91s
4018 using NIS 13.92s 8.91s 26.34s
4020 using NIS & nscd 10.37s 7.34s 25.30s
4022 using NIS+ 27.57s 30.37s 640.46s
4024 using NIS+ & nscd 10.25s 7.83s 26.51s
4026 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4028 Keep in mind that non-namelookup related operations dominate above times.
4029 It was just a common complain that using NIS+ unpacking the kernel is
4032 [1] The old nscd implementation is not available anymore since it was
4033 distributed with glibc up to version 2.0.98 and thus is now replaced.
4035 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4037 * Mark Kettenis provided a Hesiod NSS module.
4039 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4040 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4042 * rcmd can now handle netgroups (Dick Streefland).
4044 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4047 * Support for the IPv6 protocol has been added to the socket API, as per the
4048 latest draft standards.
4050 * Support for Linux 2.2 has been added.
4052 * Interface changes relative to the latest 2.0.x release:
4053 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4054 addseverity NEW: Unix98
4055 alphasort64 NEW: LFS
4056 argp_err_exit_status NEW: argp, GNU ext
4057 argp_error NEW: argp, GNU ext
4058 argp_failure NEW: argp, GNU ext
4059 argp_help NEW: argp, GNU ext
4060 argp_parse NEW: argp, GNU ext
4061 argp_program_bug_address NEW: argp, GNU ext
4062 argp_program_version NEW: argp, GNU ext
4063 argp_program_version_hook NEW: argp, GNU ext
4064 argp_state_help NEW: argp, GNU ext
4065 argp_usage NEW: argp, GNU ext
4066 authdes_create NEW: Secure RPC
4067 authdes_getucred NEW: Secure RPC
4068 authdes_pk_create NEW: Secure RPC
4069 backtrace NEW: GNU ext.
4070 backtrace_symbols NEW: GNU ext.
4071 backtrace_symbols_fd NEW: GNU ext.
4073 cacosf NEW: ISO C 9x
4074 cacosh NEW: ISO C 9x
4075 cacoshf NEW: ISO C 9x
4076 cacoshl NEW: ISO C 9x
4077 cacosl NEW: ISO C 9x
4084 casinf NEW: ISO C 9x
4085 casinh NEW: ISO C 9x
4086 casinhf NEW: ISO C 9x
4087 casinhl NEW: ISO C 9x
4088 casinl NEW: ISO C 9x
4090 catanf NEW: ISO C 9x
4091 catanh NEW: ISO C 9x
4092 catanhf NEW: ISO C 9x
4093 catanhl NEW: ISO C 9x
4094 catanl NEW: ISO C 9x
4095 cbc_crypt NEW: Secure RPC
4099 ccoshf NEW: ISO C 9x
4100 ccoshl NEW: ISO C 9x
4106 cimagf NEW: ISO C 9x
4107 cimagl NEW: ISO C 9x
4108 clearerr_locked REMOVED
4109 clntunix_create NEW: sunrpc ext
4111 clog10 NEW: ISO C 9x
4112 clog10f NEW: ISO C 9x
4113 clog10l NEW: ISO C 9x
4123 cprojf NEW: ISO C 9x
4124 cprojl NEW: ISO C 9x
4126 crealf NEW: ISO C 9x
4127 creall NEW: ISO C 9x
4132 csinhf NEW: ISO C 9x
4133 csinhl NEW: ISO C 9x
4136 csqrtf NEW: ISO C 9x
4137 csqrtl NEW: ISO C 9x
4141 ctanhf NEW: ISO C 9x
4142 ctanhl NEW: ISO C 9x
4144 des_setparity NEW: Secure RPC
4145 ecb_crypt NEW: Secure RPC
4146 endutxent NEW: Unix98
4148 exp10f NEW: ISO C 9x
4149 exp10l NEW: ISO C 9x
4153 fattach NEW: STREAMS
4154 fdetach NEW: STREAMS
4158 feclearexcept NEW: ISO C 9x
4159 fegetenv NEW: ISO C 9x
4160 fegetexceptflag NEW: ISO C 9x
4161 fegetround NEW: ISO C 9x
4162 feholdexcept NEW: ISO C 9x
4164 feraiseexcept NEW: ISO C 9x
4165 ferror_locked REMOVED
4166 fesetenv NEW: ISO C 9x
4167 fesetexceptflag NEW: ISO C 9x
4168 fesetround NEW: ISO C 9x
4169 fetestexcept NEW: ISO C 9x
4170 feupdateenv NEW: ISO C 9x
4171 fflush_locked REMOVED
4175 fgets_unlocked NEW: GNU ext.
4176 fileno_locked REMOVED
4188 fputc_locked REMOVED
4189 fputs_unlocked NEW: GNU ext.
4190 fread_unlocked NEW: GNU ext.
4195 fstatvfs NEW: Unix98
4199 ftruncate64 NEW: LFS
4201 fwrite_unlocked NEW: GNU ext.
4202 gai_strerror NEW: IPv6
4206 getchar_locked REMOVED
4208 getdate_err NEW: Unix98
4209 getdate_r NEW: GNU ext.
4211 getnameinfo NEW: IPv6
4212 getnetname NEW: Secure RPC
4213 getpmsg NEW: STREAMS
4214 getpt NEW: Unix98 PTY
4215 getrlimit64 NEW: LFS
4216 getutxent NEW: Unix98
4217 getutxid NEW: Unix98
4218 getutxline NEW: Unix98
4219 glob64 NEW: GNU ext.
4220 globfree64 NEW: GNU ext.
4221 gnu_get_libc_release NEW: GNU ext.
4222 gnu_get_libc_version NEW: GNU ext.
4223 grantpt NEW: Unix98 PTY
4224 host2netname NEW: Secure RPC
4226 iconv_close NEW: iconv
4227 iconv_open NEW: iconv
4228 if_freenameindex NEW: IPv6
4229 if_indextoname NEW: IPv6
4230 if_nameindex NEW: IPv6
4231 if_nametoindex NEW: IPv6
4232 in6addr_any NEW: IPv6
4233 in6addr_loopback NEW: IPv6
4234 inet6_isipv4mapped NEW: IPv6
4235 isastream NEW: STREAMS
4236 iswblank NEW: GNU ext.
4237 key_decryptsession NEW: Secure RPC
4238 key_decryptsession_pk NEW: Secure RPC
4239 key_encryptsession NEW: Secure RPC
4240 key_encryptsession_pk NEW: Secure RPC
4241 key_gendes NEW: Secure RPC
4242 key_get_conv NEW: Secure RPC
4243 key_secretkey_is_set NEW: Secure RPC
4244 key_setnet NEW: Secure RPC
4245 key_setsecret NEW: Secure RPC
4246 llrint NEW: ISO C 9x
4247 llrintf NEW: ISO C 9x
4248 llrintl NEW: ISO C 9x
4249 llround NEW: ISO C 9x
4250 llroundf NEW: ISO C 9x
4251 llroundl NEW: ISO C 9x
4256 lrintf NEW: ISO C 9x
4257 lrintl NEW: ISO C 9x
4258 lround NEW: ISO C 9x
4259 lroundf NEW: ISO C 9x
4260 lroundl NEW: ISO C 9x
4262 makecontext NEW: Unix98
4263 mempcpy NEW: GNU ext.
4266 modify_ldt NEW: kernel
4270 nearbyint NEW: ISO C 9x
4271 nearbyintf NEW: ISO C 9x
4272 nearbyintl NEW: ISO C 9x
4273 netname2host NEW: Secure RPC
4274 netname2user NEW: Secure RPC
4275 nexttoward NEW: ISO C 9x
4276 nexttowardf NEW: ISO C 9x
4277 nexttowardl NEW: ISO C 9x
4281 passwd2des NEW: Secure RPC
4283 pow10f NEW: GNU ext.
4284 pow10l NEW: GNU ext.
4287 printf_size NEW: GNU ext.
4288 printf_size_info NEW: GNU ext.
4289 profil_counter REMOVED
4290 pthread_mutexattr_getkind_np REPLACED
4291 pthread_mutexattr_setkind_np REPLACED
4292 ptsname NEW: Unix98 PTY
4293 ptsname_r NEW: Unix98 PTY
4295 putchar_locked REMOVED
4296 putgrent NEW: GNU ext.
4298 putpmsg NEW: STREAMS
4299 pututxline NEW: Unix98
4303 readdir64_r NEW: LFS
4304 remquo NEW: ISO C 9x
4305 remquof NEW: ISO C 9x
4306 remquol NEW: ISO C 9x
4308 roundf NEW: ISO C 9x
4309 roundl NEW: ISO C 9x
4311 scalbln NEW: ISO C 9x
4312 scalblnf NEW: ISO C 9x
4313 scalblnl NEW: ISO C 9x
4315 sendfile NEW: kernel
4316 setcontext NEW: Unix98
4317 setrlimit64 NEW: LFS
4318 setutxent NEW: Unix98
4320 sigignore NEW: Unix98
4321 sigqueue NEW: POSIX.1b
4322 sigrelse NEW: Unix98
4323 sigset NEW: POSIX.1b
4324 sigtimedwait NEW: POSIX.1b
4325 sigwaitinfo NEW: POSIX.1b
4326 sincos NEW: GNU ext.
4327 sincosf NEW: GNU ext.
4328 sincosl NEW: GNU ext.
4332 strcasestr NEW: GNU ext.
4333 strtoimax NEW: ISO C 9x
4334 strtoumax NEW: ISO C 9x
4335 strverscmp NEW: GNU ext.
4336 svcauthdes_stats NEW: Secure RPC
4337 svcunix_create NEW: sunrpc etx
4338 svcunixfd_create NEW: sunrpc ext
4339 swapcontext NEW: Unix98
4340 tcgetsid NEW: Unix98 PTY
4341 tdestroy NEW: GNU ext.
4342 tgamma NEW: ISO C 9x
4343 tgammaf NEW: ISO C 9x
4344 tgammal NEW: ISO C 9x
4348 truncf NEW: ISO C 9x
4349 truncl NEW: ISO C 9x
4351 unlockpt NEW: Unix98 PTY
4352 updwtmpx NEW: Unix98
4353 user2netname NEW: Secure RPC
4354 utmpxname NEW: Unix98
4355 versionsort NEW: GNU ext.
4356 versionsort64 NEW: GNU ext.
4358 wcscasecmp NEW: GNU ext.
4359 wcsncasecmp NEW: GNU ext.
4360 wcsnlen NEW: GNU ext.
4361 wcstoimax NEW: ISO C 9x
4362 wcstoll NEW: ISO C 9x
4363 wcstoull NEW: ISO C 9x
4364 wcstoumax NEW: ISO C 9x
4366 wordexp NEW: POSIX.2
4367 wordfree NEW: POSIX.2
4368 write_profiling REMOVED
4369 xdecrypt NEW: Secure RPC
4370 xdr_authdes_cred NEW: Secure RPC
4371 xdr_authdes_verf NEW: Secure RPC
4372 xdr_cryptkeyarg NEW: Secure RPC
4373 xdr_cryptkeyarg2 NEW: Secure RPC
4374 xdr_cryptkeyres NEW: Secure RPC
4375 xdr_getcredres NEW: Secure RPC
4376 xdr_key_netstarg NEW: Secure RPC
4377 xdr_key_netstres NEW: Secure RPC
4378 xdr_keybuf NEW: Secure RPC
4379 xdr_keystatus NEW: Secure RPC
4380 xdr_netnamestr NEW: Secure RPC
4381 xdr_sizeof NEW: Secure RPC
4382 xdr_unixcred NEW: sunrpc ext
4383 xencrypt NEW: Secure RPC
4384 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4395 * inet_ntoa is thread-safe
4397 * updwtmp is moved from libutil to libc
4399 * rewrite of cbrt function
4401 * update of timezone data
4415 * add atoll function
4417 * fix complex problems in Berkeley DB code
4419 * fix math functions
4423 * fixed lots of header problems (especially Linux/GNU specific)
4425 * dynamic loader preserves all registers
4427 * Roland McGrath provided support for handling of auxiliary objects in
4428 the ELF dynamic loader.
4430 * support for parallel builds is improved
4434 * GNU extensions are no longer declared by default. To enable them you
4435 must define the macro `_GNU_SOURCE' in your program or compile with
4438 * The library has changed from using GNU ld symbol aliases to using weak
4439 symbols where available. The ELF object file format supports weak
4440 symbols; GNU ld also supports weak symbols in the a.out format. (There
4441 is also now support for other GNU ld extensions in ELF. Use the
4442 `--with-elf' option to configure to indicate you have ELF, and
4443 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4444 of many files which contained only symbol aliases, reducing the size of
4445 the source and the compiled library; many other files were renamed to
4446 less cryptic names previously occupied by the symbol alias files.
4447 There is a new header file <elf.h> for programs which operate on
4448 files in the ELF format.
4450 * Converted to Autoconf version 2, so `configure' has more options.
4451 Run `configure --help' to see the details.
4453 * The library can now be configured to build profiling, highly-optimized
4454 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4455 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4456 `configure' enable building these extra libraries. The shared library is
4457 built by default when using both ELF and GNU ld. When shared libraries
4458 are enabled, the new library `-ldl' is available for arbitrary run-time
4459 loading of shared objects; its interface is defined in <dlfcn.h>. The
4460 new header file <link.h> gives access to the internals of the run-time
4461 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4462 application of same name on other systems and it provides information
4463 about dynamically linked binaries.
4465 * The C library now provides the run-time support code for profiling
4466 executables compiled with `-pg'. Programs can control the profiling code
4467 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4468 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4469 the support for this file format was contributed by David Mosberger-Tang.
4471 * The math code has been replaced with a math library based on fdlibm from
4472 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4473 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
4474 functions. The math functions now reside in a separate library, so
4475 programs using them will need to use `-lm' their linking commands.
4477 * John C. Bowman contributed optimized ix87 assembler inline functions.
4479 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
4480 mechanism similar to that found in Solaris 2. This is now used for the
4481 group, passwd, hosts, networks, services, protocols, rpc, ethers,
4482 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
4483 file controls what services are used for each individual database. This
4484 works by loading shared libraries with names specified in `nsswitch.conf',
4485 so service modules can be changed or added at any time without even
4486 relinking any program. Currently there are the file, db, and NIS based
4487 NSS services available.
4489 * The new functions `strtoq' and `strtouq' parse integer values from
4490 strings, like `strtol' and `strtoul', but they return `long long int' and
4491 `unsigned long long int' values, respectively (64-bit quantities).
4493 * The new functions `strtof' and `strtold' parse floating-point values from
4494 strings, like `strtod', but they return `float' and `long double' values,
4495 respectively (on some machines `double' and `long double' are the same).
4497 * Ulrich Drepper has contributed new implementations of the floating-point
4498 printing and reading code used in the `printf' family of functions and
4499 `strtod', `strtof', and `strtold'. These new functions are perfectly
4500 accurate, and much faster than the old ones.
4502 * The implementation of the POSIX locale model was completely rewritten by
4503 Ulrich Drepper. This includes the new programs `localedef' and `locale'
4504 to compile the POSIX locale definition.
4506 * The former dummy implementations of the strcoll and strxfrm function are
4507 now replaced by fully functional code contributed by Ulrich Drepper. The
4508 collation information comes from the POSIX locale definitions.
4510 * The new header <langinfo.h> defines an interface for accessing
4511 various locale-dependent data (using the locale chosen with `setlocale').
4513 * Ulrich Drepper has contributed a new suite of functions for operation on
4514 wide-character and multibyte-character strings, in <wchar.h>;
4515 and classification and case conversion of wide characters, in <wctype.h>.
4516 These new functions are conforming to the ISO C, Amendement 1 specification.
4518 * There is now a second implementation of the standard I/O library available.
4519 It comes from GNU libg++ as was written by Per Bothner, heavily modified
4520 by Hongjiu Lu and made thread safe by Ulrich Drepper.
4522 * You can now use positional parameter specifications in format strings
4523 for the `printf' and `scanf' families of functions. For example,
4524 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
4525 ``Number 6, Mr Jones''. This is mainly useful when providing different
4526 format strings for different languages, whose grammars may dictate
4527 different orderings of the values being printed. To support this
4528 feature, the interface for `register_printf_handler' has changed; see
4529 the header file <printf.h> for details.
4531 * The `printf' and `scanf' families of functions now understand a new
4532 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
4533 to group numbers as indicated by the locale; for `scanf' and friends, this
4534 says to accept as valid only a number with all the proper grouping
4535 separators in the right places. In the default "C" locale, numbers are
4536 not grouped; but locales for specific countries will define the usual
4537 conventions (i.e. separate thousands with `,' in the US locale).
4539 * The pgrp functions have been regularized, slightly incompatibly but much
4540 less confusingly. The core functions are now `getpgid' and `setpgid',
4541 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
4542 argument) and BSD `setpgrp' (identical to `setpgid') functions are
4543 provided for compatibility. There is no longer an incompatible `getpgrp'
4544 with an argument declared under _BSD_SOURCE; no BSD code uses it.
4546 * The new header file <fts.h> and suite of functions simplify programs that
4547 operate on directory trees. This code comes from 4.4 BSD.
4549 * The resolver code has been updated from the BIND 4.9.5-P1 release.
4550 Parts of the code were heavily modified by Ulrich Drepper to fit in the
4551 NSS scheme used in glibc.
4553 * There is a new malloc debugging hook `__memalign_hook'.
4555 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
4556 `unsigned int' in <sys/types.h>. These are for compatibility only and
4557 their use is discouraged.
4559 * The `-lmcheck' library to enable standard malloc debugging hooks is now
4560 done differently, so that it works even without GNU ld.
4562 * New function `euidaccess' checks allowed access to a file like `access',
4563 but using the effective IDs instead of the real IDs.
4565 * The time zone data files have been updated for the latest and greatest
4566 local time conventions of the countries of the world.
4568 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
4571 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
4572 for formatting floating-point numbers. They are provided only for
4573 compatibility; new programs should use `sprintf' instead. There are
4574 also equivalent function for the `long double' floating-point type and
4575 all functions also exist in a reentrant form.
4577 * The new auxiliary library `-lutil' from 4.4 BSD contains various
4578 functions for maintaining the login-record files (primarily of use to
4579 system programs such as `login'), and convenient functions for
4580 allocating and initializing a pseudo-terminal (pty) device.
4582 * Ulrich Drepper has contributed new support for System V style
4583 shared memory and IPC on systems that support it.
4585 * Ulrich Drepper has contributed several miscellaneous new functions found
4586 in System V: The `hsearch' family of functions provide an effective
4587 implementation of hash tables; `a64l' and `l64a' provide a very simple
4588 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
4591 * Ulrich Drepper has contributed new reentrant counterparts for the
4592 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
4594 * Ulrich Drepper has contributed new, highly-optimized versions of several
4595 string functions for the i486/Pentium family of processors.
4597 * Ulrich Drepper has updated the Linux-specific code, based largely
4598 on work done in Hongjiu Lu's version of GNU libc for Linux.
4599 The GNU library now supports Linux versions 2.0.10 and later,
4600 using the ELF object file format (i[3456]86-*-linux).
4602 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
4604 * David Mosberger-Tang and Richard Henderson have ported the C library
4605 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
4606 dynamic linking support for ELF/Alpha.
4608 * Richard Henderson contributed several Alpha optimized assembler function
4609 for arithmetic and string handling.
4611 * Ulrich Drepper has contributed a new set of message catalog functions to
4612 support multiple languages using the <libintl.h> interface, for use with
4613 his new package GNU gettext. Translation volunteers have contributed
4614 catalogs of the library's messages in Spanish, German, and Korean.
4616 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
4617 program and the `catgets' function for reading the catalog files it
4618 creates. (The <libintl.h> interface is preferred; we include the
4619 <nl_types.h> interface using `catgets' only for source compatibility with
4620 programs already written to use it.)
4622 * New header file <values.h> gives SVID-compatible names for <limits.h>
4625 * Various new macros, declarations, and small header files for compatibility
4628 * New function `group_member' is a convenient way to check if a process has
4629 a given effective group ID.
4631 * When using GCC 2.7 and later, the socket functions are now declared in a
4632 special way so that passing an argument of type `struct sockaddr_in *',
4633 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
4634 `struct sockaddr *' type, does not generate a type-clash warning.
4636 * New function `error' declared in header file <error.h> is a convenient
4637 function for printing error messages and optionally exiting; this is the
4638 canonical function used in GNU programs. The new functions `err', `warn',
4639 and friends in header file <err.h> are the canonical 4.4 BSD interface for
4640 doing the same thing.
4642 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
4643 POSIX.2 `glob' function to do ~ and {...} expansion.
4645 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
4646 `clearenv' which is used in POSIX.9 is also available.
4648 * New function `getsid' returns session ID number on systems that support it.
4650 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
4651 files <db.h> and <mpool.h> provide a rich set of functions for several
4652 types of simple databases stored in memory and in files, and <ndbm.h> is
4653 an old `ndbm'-compatible interface using the `db' functions. Link with
4654 `-ldb' to get these functions.
4656 * New macro `strdupa' copies a string like `strdup', but uses local stack
4657 space from `alloca' instead of dynamic heap space from `malloc'.
4659 * New function `strnlen' is like `strlen' but searches only a given maximum
4660 number of characters for the null terminator. `stpncpy', `strndup' and
4661 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
4664 * New function `statfs' in header <sys/statfs.h>.
4666 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
4667 provide convenient functions for operating on blocks of null-terminated
4670 * A new suite of functions in <utmp.h> handle all the details of reading
4671 and writing the utmp file.
4673 * An implementation of the NIS/YP(tm) based NSS service was contributed by
4676 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
4677 completely POSIX compliant and also implemented the extended functionality
4678 to handle alternate digit representation and alternate era date formats.
4680 * Ulrich Drepper provided an implementation of the `strptime' function
4681 defined in XPG4.2 which transforms a string into a `struct tm' value.
4683 * Paul Eggert provided the tzselect shell script as part of the timezone
4684 code. The shell script makes it easy to select the correct timezone
4687 * The implementation of the malloc family of functions is completely replaced
4688 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
4689 The implementation uses the mmap function (if available) and it is
4690 optimized for the use in multi threaded programs.
4692 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
4693 functions. This new functionality is usable by specifying a special
4694 salt string and it is compatible with implementation on *BSD systems.
4696 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
4697 `getsubopt' to handle second level command line options, `bsd_signal'
4698 to access BSD style `signal' functionality, the obsolete `regexp' style
4701 * the `lchown' function is available on system which support this
4704 * The implementation of the shadow password handling function was contributed
4707 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
4709 * POSIX.1g support was added. The <sys/select.h> header is available,
4710 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
4711 implementation of `getaddrinfo'.
4715 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
4717 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
4718 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
4720 * The new function `daemon' from 4.4 BSD is useful for server programs that
4721 want to put themselves in the background.
4723 * Joel Sherrill has contributed support for several standalone boards that
4724 run without an operating system.
4726 * `printf', `scanf' and friends now accept a `q' type modifier for long
4727 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
4729 * All of the code taken from BSD (notably most of the math and networking
4730 routines) has been updated from the BSD 4.4-Lite release.
4732 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
4734 * The new functions `getdomainname' and `setdomainname' fetch or change the
4735 YP/NIS domain name. These are system calls which exist on systems which
4738 * The time zone data files have been updated for the latest international
4741 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
4742 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
4746 * The C library now includes support for Sun RPC, from Sun's free
4747 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
4748 are included. (There is still no support for YP.)
4750 * Tom Quinn has contributed a port of the C library to SGI machines running
4751 Irix 4 (mips-sgi-irix4).
4753 * The new `lockf' function is a simplified interface to the locking
4754 facilities of `fcntl', included for compatibility.
4756 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
4758 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
4760 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
4763 * The error message printed by `assert' for a failed assertion now includes
4764 the name of the program (if using GNU ld) and the name of the calling
4765 function (with versions of GCC that support this).
4767 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
4769 * The library now includes the <sys/mman.h> header file and memory
4770 management functions `mmap', `munmap', `mprotect', `msync', and
4771 `madvise', on systems that support those facilities.
4773 * The interface for `mcheck' has changed slightly: the function called to
4774 abort the program when an allocation inconsistency is detected now takes
4775 an argument that indicates the type of failure. The new function
4776 `mprobe' lets you request a consistency check for a particular block at
4777 any time (checks are normally done only when you call `free' or `realloc'
4780 * It is now possible to easily cross-compile the C library, building on one
4781 system a library to run on another machine and/or operating system. All
4782 you need to do is set the variable `HOST_CC' in `configparms' to the
4783 native compiler for programs to run on the machine you are building on (a
4784 few generator programs are used on Unix systems); set `CC' to the
4787 * The new function `fexecve' (only implemented on the GNU system) executes
4788 a program file given a file descriptor already open on the file.
4792 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4793 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4795 * You can set the variable `libprefix' in `configparms' to specify a prefix
4796 to be prepended to installed library files; this makes it easy to install
4797 the GNU C library to be linked as `-lgnuc' or whatever.
4799 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4800 copies a limited number of characters from a string, and returns the
4801 address of the last character written.
4803 * You no longer need to check for whether the installed `stddef.h' is
4804 compatible with the GNU C library. configure now checks for you.
4806 * You can now define a per-stream `fileno' function to convert the
4807 stream's cookie into an integral file descriptor.
4809 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4810 allocates zero bytes of storage, and returns a unique pointer which
4811 you can pass to `realloc' or `free'. The behavior is undefined if
4812 you dereference this pointer.
4814 * The C library now runs on Sony NEWS m68k machines running either
4815 NewsOS 3 or NewsOS 4.
4817 * The new `syscall' function is a system-dependent primitive function
4818 for invoking system calls. It has the canonical behavior on Unix
4819 systems, including unreliable return values for some calls (such as
4820 `pipe', `fork' and `getppid').
4822 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4823 to `EAGAIN', which is the preferred name. On systems whose kernels
4824 use two distinct codes, the C library now translates EWOULDBLOCK to
4825 EAGAIN in every system call function.
4829 * The GNU C Library Reference Manual is now distributed with the library.
4830 `make dvi' will produce a DVI file of the printed manual.
4831 `make info' will produce Info files that you can read on line using C-h i
4832 in Emacs or the `info' program.
4833 Please send comments on the manual to bug-glibc-manual@gnu.org.
4835 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4837 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4839 * Jason Merrill has contributed a port to the Sequent Symmetry running
4840 Dynix version 3 (i386-sequent-dynix).
4842 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4843 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4845 * New function `memory_warnings' lets you arrange to get warnings when
4846 malloc is running out of memory to allocate, like Emacs gives you.
4848 * The C library now contains the relocating allocator used in Emacs 19 for
4849 its editing buffers. This allocator (ralloc) minimizes allocation
4850 overhead and fragmentation by moving allocated regions around whenever it
4851 needs to. You always refer to a ralloc'd region with a "handle" (a
4852 pointer to a pointer--an object of type `void **').
4854 * There is a new `printf' format: `%m' gives you the string corresponding
4855 to the error code in `errno'.
4857 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4858 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4859 pass, the `a' modifier says to fill in a `char **' you pass with a
4862 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4863 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4864 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4866 * `mkstemp' is a traditional Unix function to atomically create and open a
4867 uniquely-named temporary file.
4871 * The standard location for the file that says what the local timezone is
4872 has changed again. It is now `/usr/local/etc/localtime' (or more
4873 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4875 * The distribution no longer contains any files with names longer than 14
4878 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4879 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4881 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4885 * The configuration process has changed quite a bit. The `configure'
4886 script is now used just like the configuration scripts for other GNU
4887 packages. The `sysdeps' directory hierarchy is much rearranged.
4888 The file `INSTALL' explains the new scheme in detail.
4890 * The header files no longer need to be processed into ANSI C and
4891 traditional C versions. There is just one set of files to install, and
4892 it will work with ANSI or old C compilers (including `gcc -traditional').
4894 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4895 MIPS DECStation running Ultrix 4.
4897 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4898 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4899 made itself into a shared library.
4901 * Yet further improved support for the i386, running 4.3 BSD-like systems
4902 (such as Mach 3 with the Unix single-server), or System V.
4904 * New function `strncasecmp' to do case-insensitive string comparison
4905 with limited length.
4907 * New function `strsep' is a reentrant alternative to `strtok'.
4909 * New functions `scandir' and `alphasort' for searching directories.
4911 * New function `setenv' is a better interface to `putenv'.
4913 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4914 function for traversing a directory tree.
4916 * The GNU obstack package is now also part of the C library.
4917 The new function `open_obstack_stream' creates a stdio stream that
4918 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4919 formatted output directly to an obstack.
4921 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4922 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4924 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4926 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4927 things to your strings.
4929 * There are some new test programs: test-fseek, testmb, and testrand.
4931 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4932 These ports are not finished, but are a good starting place for really
4933 supporting those systems.
4935 * `/etc/localtime' is now the standard location for the file that says what
4936 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4937 This follows the general principle that `/etc' is the place for all local
4938 configuration files.
4940 * The C library header files now use `extern "C"' when used by the C++
4941 compiler, so the C library should now work with C++ code.
4943 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4944 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4947 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4948 function which uses the `merge sort' algorithm, and is said to be
4949 significantly faster than the old GNU `qsort' function. Merge sort is
4950 now the standard `qsort' function. The new algorithm can require a lot
4951 of temporary storage; so, the old sorting function is called when the
4952 required storage is not available.
4954 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4955 provides the Unix `crypt' function, plus some other entry points.
4957 * The code and header files taken from 4.4 BSD have been updated with the
4958 latest files released from Berkeley.
4960 ----------------------------------------------------------------------
4961 Copyright information:
4963 Copyright (C) 1992-2018 Free Software Foundation, Inc.
4965 Permission is granted to anyone to make or distribute verbatim copies
4966 of this document as received, in any medium, provided that the
4967 copyright notice and this permission notice are preserved,
4968 thus giving the recipient permission to redistribute in turn.
4970 Permission is granted to distribute modified versions
4971 of this document, or of portions of it,
4972 under the above conditions, provided also that they
4973 carry prominent notices stating who last changed them.
4976 version-control: never