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 * Two grammatical forms of 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 two grammatical forms in abbreviated month names: Catalan, Greek,
57 * Newly added locales: Lower Sorbian (dsb_DE) and Yakut (sah_RU) also
58 include the support for two grammatical forms of month names.
60 * Building and running on GNU/Hurd systems now works without out-of-tree
63 * The renameat2 function has been added, a variant of the renameat function
64 which has a flags argument. If the flags are zero, the renameat2 function
65 acts like renameat. If the flag is not zero and there is no kernel
66 support for renameat2, the function will fail with an errno value of
67 EINVAL. This is different from the existing gnulib function renameatu,
68 which performs a plain rename operation in case of a RENAME_NOREPLACE
69 flags and a non-existing destination (and therefore has a race condition
70 that can clobber the destination inadvertently).
72 * The statx function has been added, a variant of the fstatat64
73 function with an additional flags argument. If there is no direct
74 kernel support for statx, glibc provides basic stat support based on
75 the fstatat64 function.
77 * IDN domain names in getaddrinfo and getnameinfo now use the system libidn2
78 library if installed. libidn2 version 2.0.5 or later is recommended. If
79 libidn2 is not available, internationalized domain names are not encoded
80 or decoded even if the AI_IDN or NI_IDN flags are passed to getaddrinfo or
81 getnameinfo. (getaddrinfo calls with non-ASCII names and AI_IDN will fail
82 with an encoding error.) Flags which used to change the IDN encoding and
83 decoding behavior (AI_IDN_ALLOW_UNASSIGNED, AI_IDN_USE_STD3_ASCII_RULES,
84 NI_IDN_ALLOW_UNASSIGNED, NI_IDN_USE_STD3_ASCII_RULES) have been
85 deprecated. They no longer have any effect.
87 * Parsing of dynamic string tokens in DT_RPATH, DT_RUNPATH, DT_NEEDED,
88 DT_AUXILIARY, and DT_FILTER has been expanded to support the full
89 range of ELF gABI expressions including such constructs as
90 '$ORIGIN$ORIGIN' (if valid). For SUID/GUID applications the rules
91 have been further restricted, and where in the past a dynamic string
92 token sequence may have been interpreted as a literal string it will
93 now cause a load failure. These load failures were always considered
94 unspecified behaviour from the perspective of the dynamic loader, and
95 for safety are now load errors e.g. /foo/${ORIGIN}.so in DT_NEEDED
96 results in a load failure now.
98 * Support for ISO C threads (ISO/IEC 9899:2011) has been added. The
99 implementation includes all the standard functions provided by
102 - thrd_current, thrd_equal, thrd_sleep, thrd_yield, thrd_create,
103 thrd_detach, thrd_exit, and thrd_join for thread management.
105 - mtx_init, mtx_lock, mtx_timedlock, mtx_trylock, mtx_unlock, and
106 mtx_destroy for mutual exclusion.
108 - call_once for function call synchronization.
110 - cnd_broadcast, cnd_destroy, cnd_init, cnd_signal, cnd_timedwait, and
111 cnd_wait for conditional variables.
113 - tss_create, tss_delete, tss_get, and tss_set for thread-local storage.
115 Application developers must link against libpthread to use ISO C threads.
117 Deprecated and removed features, and other changes affecting compatibility:
119 * The nonstandard header files <libio.h> and <_G_config.h> are no longer
120 installed. Software that was using either header should be updated to
121 use standard <stdio.h> interfaces instead.
123 * The stdio functions 'getc' and 'putc' are no longer defined as macros.
124 This was never required by the C standard, and the macros just expanded
125 to call alternative names for the same functions. If you hoped getc and
126 putc would provide performance improvements over fgetc and fputc, instead
127 investigate using (f)getc_unlocked and (f)putc_unlocked, and, if
128 necessary, flockfile and funlockfile.
130 * All stdio functions now treat end-of-file as a sticky condition. If you
131 read from a file until EOF, and then the file is enlarged by another
132 process, you must call clearerr or another function with the same effect
133 (e.g. fseek, rewind) before you can read the additional data. This
134 corrects a longstanding C99 conformance bug. It is most likely to affect
135 programs that use stdio to read interactive input from a terminal.
138 * The macros 'major', 'minor', and 'makedev' are now only available from
139 the header <sys/sysmacros.h>; not from <sys/types.h> or various other
140 headers that happen to include <sys/types.h>. These macros are rarely
141 used, not part of POSIX nor XSI, and their names frequently collide with
142 user code; see https://sourceware.org/bugzilla/show_bug.cgi?id=19239 for
145 <sys/sysmacros.h> is a GNU extension. Portable programs that require
146 these macros should first include <sys/types.h>, and then include
147 <sys/sysmacros.h> if __GNU_LIBRARY__ is defined.
149 * The tilegx*-*-linux-gnu configurations are no longer supported.
151 * The obsolete function ustat is no longer available to newly linked
152 binaries; the headers <ustat.h> and <sys/ustat.h> have been removed. This
153 function has been deprecated in favor of fstatfs and statfs.
155 * The obsolete function nfsservctl is no longer available to newly linked
156 binaries. This function was specific to systems using the Linux kernel
157 and could not usefully be used with the GNU C Library on systems with
158 version 3.1 or later of the Linux kernel.
160 * The obsolete function name llseek is no longer available to newly linked
161 binaries. This function was specific to systems using the Linux kernel
162 and was not declared in a header. Programs should use the lseek64 name
163 for this function instead.
165 * The AI_IDN_ALLOW_UNASSIGNED and NI_IDN_ALLOW_UNASSIGNED flags for the
166 getaddrinfo and getnameinfo functions have been deprecated. The behavior
167 previously selected by them is now always enabled.
169 * The AI_IDN_USE_STD3_ASCII_RULES and NI_IDN_USE_STD3_ASCII_RULES flags for
170 the getaddrinfo and getnameinfo functions have been deprecated. The STD3
171 restriction (rejecting '_' in host names, among other things) has been
172 removed, for increased compatibility with non-IDN name resolution.
174 * The fcntl function now have a Long File Support variant named fcntl64. It
175 is added to fix some Linux Open File Description (OFD) locks usage on non
176 LFS mode. As for others *64 functions, fcntl64 semantics are analogous with
177 fcntl and LFS support is handled transparently. Also for Linux, the OFD
178 locks act as a cancellation entrypoint.
180 * The obsolete functions encrypt, encrypt_r, setkey, setkey_r, cbc_crypt,
181 ecb_crypt, and des_setparity are no longer available to newly linked
182 binaries, and the headers <rpc/des_crypt.h> and <rpc/rpc_des.h> are no
183 longer installed. These functions encrypted and decrypted data with the
184 DES block cipher, which is no longer considered secure. Software that
185 still uses these functions should switch to a modern cryptography library,
188 * Reflecting the removal of the encrypt and setkey functions above, the
189 macro _XOPEN_CRYPT is no longer defined. As a consequence, the crypt
190 function is no longer declared unless _DEFAULT_SOURCE or _GNU_SOURCE is
193 * The obsolete function fcrypt is no longer available to newly linked
194 binaries. It was just another name for the standard function crypt,
195 and it has not appeared in any header file in many years.
197 * We have tentative plans to hand off maintenance of the passphrase-hashing
198 library, libcrypt, to a separate development project that will, we hope,
199 keep up better with new passphrase-hashing algorithms. We will continue
200 to declare 'crypt' in <unistd.h>, and programs that use 'crypt' or
201 'crypt_r' should not need to change at all; however, distributions will
202 need to install <crypt.h> and libcrypt from a separate project.
204 In this release, if the configure option --disable-crypt is used, glibc
205 will not install <crypt.h> or libcrypt, making room for the separate
206 project's versions of these files. The plan is to make this the default
207 behavior in a future release.
209 Changes to build and runtime requirements:
211 GNU make 4.0 or later is now required to build glibc.
213 Security related changes:
215 CVE-2016-6261, CVE-2016-6263, CVE-2017-14062: Various vulnerabilities have
216 been fixed by removing the glibc-internal IDNA implementation and using
217 the system-provided libidn2 library instead. Originally reported by Hanno
218 Böck and Christian Weisgerber.
220 CVE-2017-18269: An SSE2-based memmove implementation for the i386
221 architecture could corrupt memory. Reported by Max Horn.
223 CVE-2018-11236: Very long pathname arguments to realpath function could
224 result in an integer overflow and buffer overflow. Reported by Alexey
227 CVE-2018-11237: The mempcpy implementation for the Intel Xeon Phi
228 architecture could write beyond the target buffer, resulting in a buffer
229 overflow. Reported by Andreas Schwab.
231 The following bugs are resolved with this release:
233 [The release manager will add the list generated by
234 scripts/list-fixed-bugs.py just before the release.]
241 * The GNU C Library can now be compiled with support for building static
242 PIE executables (See --enable-static-pie in INSTALL). These static PIE
243 executables are like static executables but can be loaded at any address
244 and provide additional security hardening benefits at the cost of some
245 memory and performance. When the library is built with --enable-static-pie
246 the resulting libc.a is usable with GCC 8 and above to create static PIE
247 executables using the GCC option '-static-pie'. This feature is currently
248 supported on i386, x86_64 and x32 with binutils 2.29 or later, and on
249 aarch64 with binutils 2.30 or later.
251 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
252 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
255 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
257 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
259 * In order to support faster and safer process termination the malloc API
260 family of functions will no longer print a failure address and stack
261 backtrace after detecting heap corruption. The goal is to minimize the
262 amount of work done after corruption is detected and to avoid potential
263 security issues in continued process execution. Reducing shutdown time
264 leads to lower overall process restart latency, so there is benefit both
265 from a security and performance perspective.
267 * The abort function terminates the process immediately, without flushing
268 stdio streams. Previous glibc versions used to flush streams, resulting
269 in deadlocks and further data corruption. This change also affects
270 process aborts as the result of assertion failures.
272 * On platforms where long double has the IEEE binary128 format (aarch64,
273 alpha, mips64, riscv, s390 and sparc), the math library now implements
274 _Float128 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015.
275 These are the same interfaces added in version 2.26 for some platforms where
276 this format is supported but is not the format of long double.
278 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
279 mips64, powerpc64le, riscv, s390, sparc and x86_64), the math library now
280 implements interfaces for that type, as defined by ISO/IEC TS
281 18661-3:2015. These are corresponding interfaces to those supported for
284 * The math library now implements interfaces for the _Float32, _Float64 and
285 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
286 corresponding interfaces to those supported for _Float128.
288 * glibc now implements the memfd_create and mlock2 functions on Linux.
290 * Support for memory protection keys was added. The <sys/mman.h> header now
291 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
294 * The copy_file_range function was added.
296 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
298 * The ldconfig utility now processes `include' directives using the C/POSIX
299 collation ordering. Previous glibc versions used locale-specific
300 ordering, the change might break systems that relied on that.
302 * Support for two grammatical forms of month names has been added.
303 In a call to strftime, the "%B" and "%b" format specifiers will now
304 produce the grammatical form required when the month is used as part
305 of a complete date. New "%OB" and "%Ob" specifiers produce the form
306 required when the month is named by itself. For instance, in Greek
307 and in many Slavic and Baltic languages, "%B" will produce the month
308 in genitive case, and "%OB" will produce the month in nominative case.
310 In a call to strptime, "%B", "%b", "%h", "%OB", "%Ob", and "%Oh"
311 are all valid and will all accept any known form of month
312 name---standalone or complete, abbreviated or full. In a call to
313 nl_langinfo, the query constants MON_1..12 and ABMON_1..12 return
314 the strings used by "%B" and "%b", respectively. New query
315 constants ALTMON_1..12 and _NL_ABALTMON_1..12 return the strings
316 used by "%OB" and "%Ob", respectively.
318 In a locale definition file, use "alt_mon" and "ab_alt_mon" to
319 define the strings for %OB and %Ob, respectively; these have the
320 same syntax as "mon" and "abmon". These arrays are optional; if they
321 are not provided then they have the same content as "mon" and "abmon",
324 These features are provided for locales which define "alt_mon" and/or
325 "ab_alt_mon" in their locale source data. This release includes such
326 alternative month name data for the following languages: Belarusian,
327 Croatian, Greek, Lithuanian, Polish, Russian, and Ukrainian.
329 This feature is currently a GNU extension, but it is expected to
330 be added to the next revision of POSIX, and it is also already
331 available on some BSD-derived operating systems.
333 This feature will cause existing statically compiled applications
334 to fail to load locales and fall back to the builtin C/POSIX locales.
335 See notes below for other changes affecting compatibility.
337 * Support for the RISC-V ISA running on Linux has been added. This port
338 requires at least binutils-2.30, gcc-7.3.0, and linux-4.15; and is supported
339 for the following ISA and ABI pairs:
345 Deprecated and removed features, and other changes affecting compatibility:
347 * Statically compiled applications attempting to load locales compiled for the
348 GNU C Library version 2.27 will fail and fall back to the builtin C/POSIX
349 locale. The reason for this is that the addition of the new "%OB" and "%Ob",
350 support for two grammatical forms of the month names, also extends the locale
351 data binary format. Static applications needing locale support must be
352 recompiled to match the runtime and data they are deployed with. In some
353 distributions there is an upgrade window where dynamically linked applications
354 may use a new library but the old locale data and also fall back to the
355 builtin C/POSIX locales; restarting the application process is sufficient to
358 * Support for statically linked applications which call dlopen is deprecated
359 and will be removed in a future version of glibc. Applications which call
360 dlopen need to be linked dynamically instead.
362 * Support for old programs which use internal stdio data structures and
363 functions is deprecated. This includes programs which use the C++ streams
364 provided by libstdc++ in GCC 2.95. Programs which use the internal
365 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
366 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
367 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
368 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
369 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
370 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
371 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
372 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
373 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
374 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
375 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
376 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
377 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
378 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
379 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
380 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
381 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
382 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
383 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
384 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
385 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
386 future version of glibc. Unlike other symbol removals, these old
387 applications will not be supported using compatibility symbols.
389 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
390 defined by <sys/ptrace.h>.
392 * libm no longer supports SVID error handling (calling a user-provided
393 matherr function on error) or the _LIB_VERSION variable to control error
394 handling. (SVID error handling and the _LIB_VERSION variable still work
395 for binaries linked against older versions of the GNU C Library.) The
396 libieee.a library is no longer provided. math.h no longer defines struct
397 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
398 TLOSS, PLOSS and HUGE.
400 * The libm functions pow10, pow10f and pow10l are no longer supported for
401 new programs. Programs should use the standard names exp10, exp10f and
402 exp10l for these functions instead.
404 * The mcontext_t type is no longer the same as struct sigcontext. On
405 platforms where it was previously the same, this changes the C++ name
406 mangling for interfaces involving this type.
408 * The add-ons mechanism for building additional packages at the same time as
409 glibc has been removed. The --enable-add-ons configure option is now
412 * The --without-fp configure option is now ignored. Whether hardware
413 floating-point instructions are used is now configured based on whether
414 the compiler used at configure time (without any options implied by a
415 --with-cpu= configure option) uses such instructions.
417 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
418 the specified string can be parsed as a domain name.
420 * In the malloc_info output, the <heap> element may contain another <aspace>
421 element, "subheaps", which contains the number of sub-heaps.
423 * The libresolv function p_secstodate is no longer supported for new
426 * The tilepro-*-linux-gnu configuration is no longer supported.
428 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
429 and will be removed in a future release. Software that is still using
430 either header should be updated to use standard <stdio.h> interfaces
433 libio.h was originally the header for a set of supported GNU extensions,
434 but they have not been maintained as such in many years, they are now
435 standing in the way of improvements to stdio, and we don't think there are
436 any remaining external users. _G_config.h was never intended for public
437 use, but predates the bits convention.
439 Changes to build and runtime requirements:
441 * bison version 2.7 or later is required to generate code in the 'intl'
444 Security related changes:
446 CVE-2009-5064: The ldd script would sometimes run the program under
447 examination directly, without preventing code execution through the
448 dynamic linker. (The glibc project disputes that this is a security
449 vulnerability; only trusted binaries must be examined using the ldd
452 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
453 suffered from a one-byte overflow during ~ operator processing (either
454 on the stack or the heap, depending on the length of the user name).
455 Reported by Tim Rühsen.
457 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
458 would sometimes fail to free memory allocated during ~ operator
459 processing, leading to a memory leak and, potentially, to a denial
462 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
463 without GLOB_NOESCAPE, could write past the end of a buffer while
464 unescaping user names. Reported by Tim Rühsen.
466 CVE-2017-17426: The malloc function, when called with an object size near
467 the value SIZE_MAX, would return a pointer to a buffer which is too small,
468 instead of NULL. This was a regression introduced with the new malloc
469 thread cache in glibc 2.26. Reported by Iain Buclaw.
471 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
472 to the allocation of too much memory. (This is not a security bug per se,
473 it is mentioned here only because of the CVE assignment.) Reported by
476 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
477 of the number of search path components. (This is not a security
478 vulnerability per se because no trust boundary is crossed if the fix for
479 CVE-2017-1000366 has been applied, but it is mentioned here only because
480 of the CVE assignment.) Reported by Qualys.
482 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
483 for AT_SECURE or SUID binaries could be used to load libraries from the
486 CVE-2018-1000001: Buffer underflow in realpath function when getcwd function
487 succeeds without returning an absolute path due to unexpected behaviour
488 of the Linux kernel getcwd syscall. Reported by halfdog.
490 CVE-2018-6485: The posix_memalign and memalign functions, when called with
491 an object size near the value of SIZE_MAX, would return a pointer to a
492 buffer which is too small, instead of NULL. Reported by Jakub Wilk.
494 CVE-2018-6551: The malloc function, when called with an object size near
495 the value of SIZE_MAX, would return a pointer to a buffer which is too
496 small, instead of NULL.
498 The following bugs are resolved with this release:
500 [866] glob: glob should match dangling symlinks
501 [1062] glob: sysdeps/generic/glob.c merge from gnulib (part 3 of 3)
502 [2522] localedata: ca_ES@valencia: new Valencian (meridional Catalan)
504 [5997] math: Very slow execution of sinf function
505 [10580] localedata: hr_HR: updated locale
506 [10871] locale: 'mon' array should contain both nominative and genitive
508 [12349] localedata: eu_ES: incorrect thousands separator
509 [13605] localedata: shn_MM: new Shan locale
510 [13805] localedata: ru_RU: currency should use ',' as radix point
511 [13953] localedata: km_KH: locale update
512 [13994] localedata: mjw_IN: new locale
513 [14121] build: make writes .mo files in po directory
514 [14333] libc: Fix the race between atexit() and exit()
515 [14681] dynamic-link: _dl_get_origin leaks memory via executable link map.
516 [14925] localedata: bn_*: LC_IDENTIFICATION.language key should be
518 [15260] localedata: LC_MESSAGES.{yes,no}{str,expr}: various errors
519 [15261] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of full-
520 width Latin characters
521 [15332] localedata: es_CU: locale update
522 [15436] stdio: Don't close or flush stdio streams on abort
523 [15537] localedata: lv_LV: invalid collation for Latvian diacritical
525 [16148] localedata: ca_ES: incorrect thousands separator
526 [16750] dynamic-link: ldd should not try to execute the binaries
528 [16777] localedata: pl_PL: incorrect thousands separator in locale
529 [16905] localedata: hanzi: new collation
530 [17563] localedata: cmn_TW: add hanzi collation
531 [17750] localedata: wrong collation order of diacritics in most locales
532 [17804] libc: scandirat fails with ENOMEM because it checks for errno even
534 [17956] build: Build fails on missing definitions from header file
535 nss/nss.h when Mozilla NSS is used for cryptography
536 [18203] libc: realpath() does not handle unreachable paths correctly
537 [18572] dynamic-link: [arm] Lazy TLSDESC relocation has data race
538 [18812] localedata: kab_DZ: new Kabyle Algeria locale
539 [18822] libc: Internal functions are called via PLT
540 [18858] string: _HAVE_STRING_ARCH_xxx aren't defined for i386 nor x86_64
541 [19170] libc: __gmon_start__ defined in hppa in crtn.S
542 [19574] libc: glibc should support building static PIE binaries
543 [19852] localedata: charmaps/UTF-8: incorrect wcwidth for U+3099 and
545 [19971] glob: glob: Do not skip entries with zero d_ino values
546 [19982] localedata: fr.po: spelling mistake for error code EXDEV
547 [20008] localedata: km_KH: convert to translit_neutral
548 [20009] localedata: tr_TR: convert LC_CTYPE to i18n
549 [20142] math: [x86_64] Add SSE4.1 trunc, truncf
550 [20204] dynamic-link: _dl_open_hook and _dlfcn_hook hardening
551 [20482] localedata: de_CH: abbreviated weekdays should be two letters
552 [20498] localedata: miq_NI: new Mískitu / Miskito (miq) language locale
554 [20532] nss: getaddrinfo uses errno and h_errno without guaranteeing
555 they're set, wrong errors returned by gaih_inet when lookup functions
557 [20756] localedata: [PATCH] Use Unicode wise thousands separator
558 [20826] network: posix/tst-getaddrinfo5 fails on hosts without network
560 [20952] localedata: yuw_PG: new locale
561 [21084] localedata: charmaps/IBM858: new codepage
562 [21161] manual: [PATCH] fix typo in manual/arith.texi on strtoul prototype
563 [21242] libc: assert gives pedantic warning in old gcc versions
564 [21265] dynamic-link: _dl_runtime_resolve isn't compatible with Intel C++
565 __regcall calling convention
566 [21309] math: signed integer overflow in sysdeps/ieee754/dbl-64/e_pow.c
567 [21326] libc: C99 functions are not declared for C++11 and later if
568 _GNU_SOURCE is not predefined by g++
569 [21457] libc: sys/ucontext.h namespace
570 [21530] libc: tmpfile() should be implemented using O_TMPFILE
571 [21660] math: GCC fails to compile a formula with tgmath.h
572 [21672] nptl: sys-libs/glibc on ia64 crashes on thread exit: signal
573 SIGSEGV, Segmentation fault: pthread_create.c:432: __madvise
574 (pd->stackblock, freesize - PTHREAD_STACK_MIN, MADV_DONTNEED);
575 [21684] math: tgmath.h handling of complex integers
576 [21685] math: tgmath.h handling of bit-fields
577 [21686] math: tgmath.h handling of __int128
578 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
580 [21745] libc: [powerpc64le] Extra PLT reference with --enable-stack-
582 [21750] localedata: column width of characters incompatible with classical
584 [21754] malloc: malloc: Perform as little work as possible after heap
585 consistency check failures
586 [21780] libc: hppa: p{read,write}v2 does not set ENOSUP on invalid flag
587 [21790] libc: Missing __memset_zero_constant_len_parameter in libc.so
588 [21791] string: Unused XXX_chk_XXX functions in libc.a
589 [21815] dynamic-link: FAIL: elf/tst-prelink-cmp with GCC is defaulted to
591 [21836] localedata: Removed redundant data (LC_MONETARY) in various Indian
593 [21845] localedata: Added new Locale bho_NP
594 [21853] localedata: Fix abday Which looks same as day in zh_SG
595 [21854] localedata: Added New Locale en_SC
596 [21864] libc: xmalloc.o is compiled with -DMODULE_NAME=libc
597 [21871] dynamic-link: _dl_runtime_resolve_avx_opt is slower than
598 _dl_runtime_resolve_avx_slow
599 [21885] network: getaddrinfo: gethosts does not release resolver context
600 on memory allocation failure
601 [21899] libc: XPG4.2 sigaction namespace
602 [21908] dynamic-link: dynamic linker broke on ia64 (mmap2 consolidation is
604 [21913] libc: static binaries SIGSEGV in __brk when host's gcc is pie-by-
606 [21915] nss: nss_files can return with NSS_STATUS_SUCCESS and a clobbered
607 errno value, causing getaddrinfo to fail
608 [21920] localedata: Fix p_cs_precedes/n_cs_precedes for mt_MT
609 [21922] network: getaddrinfo with AF_INET/AF_INET6 returns EAI_NONAME
610 instead of EAI_NODATA
611 [21928] libc: sys/ptrace.h: remove obsolete temporary development Linux
612 constant PTRACE_SEIZE_DEVEL
613 [21930] math: C-only gcc builtins used in <math.h> isinf
614 [21932] network: Unpaired __resolv_context_get in generic get*_r
616 [21941] math: powerpc: Wrong register constraint for xssqrtqp in sqrtf128
617 [21944] libc: sigval namespace
618 [21951] localedata: Update hanzi collation by stroke
619 [21955] math: Wrong alignment of L(SP_RANGE)/L(SP_INF_0) in
620 sysdeps/x86_64/fpu/e_expf.S
621 [21956] libc: Stack allocation in MIPS syscall impl (ubounded stack
622 allocation in syscall loops)
623 [21959] localedata: Fix Country name for xh_ZA
624 [21960] localedata: Fix abmon for bem_ZM
625 [21966] math: AVX2 mathvec functions use FMA without checking
626 [21967] math: When 512-bit AVX2 wrapper functions in mathvec are used?
627 [21971] localedata: Added New Locale for mfe_MU
628 [21972] libc: assert macro requires operator== (int) for its argument type
629 [21973] math: [sparc] libm missing sqrtl compat symbol
630 [21974] libc: Remove __bb_init_func and __bb_exit_func
631 [21982] string: stratcliff.c: error: assuming signed overflow does not
633 [21986] stdio: __guess_grouping is called incorrectly
634 [21987] math: [sparc32] wrong bits/long-double.h installed
635 [22019] localedata: Wrong placement of monetary symbol in el_GR (negative
637 [22022] localedata: Missing country_name for mni_IN
638 [22023] localedata: Removed redundant data (LC_TIME and LC_MESSAGES) for
640 [22025] locale: iconv: Inconsistency between pointer mangling and NULL
642 [22026] locale: iconv_open: heap overflow on gconv_init failure
643 [22028] math: bits/math-finite.h _MSUF_ expansion namespace
644 [22035] math: [m68k] bits/math-inline.h macro namespace
645 [22038] localedata: Fix abbreviated weeks and months for Somali
646 [22044] localedata: Remove redundant data for Limburgish Language
647 [22050] malloc: Linking with -lmcheck does not hook
648 __malloc_initialize_hook correctly
649 [22051] libc: zero terminator in the middle of glibc's .eh_frame
650 [22052] malloc: malloc failed to compile with GCC 7 and -O3
651 [22070] localedata: charmaps/UTF-8: wcwidth for
652 Prepended_Concatenation_Mark codepoints set to 0 (should be 1)
653 [22074] localedata: charmaps/UTF-8: wcwidth for U+1160-U+11FF (Hangul
654 Jungseong and Jongseong) should be 0
655 [22078] nss: nss_files performance issue in multi mode
656 [22082] math: bits/math-finite.h exp10 condition
657 [22086] libc: pcprofiledump incorrect cross-endian condition
658 [22093] dynamic-link: ld.so no longer searches in .../x86_64
659 [22095] network: Name server address allocation memory leak in resolv.conf
661 [22096] network: __resolv_conf_attach can incorrectly free passed conf
663 [22100] localedata: om_KE: LC_TIME: copy redundant data from om_ET
664 [22101] dynamic-link: Dynamic loader must ignore "debug" shared objects
666 [22111] malloc: malloc: per thread cache is not returned when thread exits
667 [22112] localedata: Fix LC_TELEPHONE/LC_NAME for az_AZ
668 [22134] libc: [linux] implement fexecve with execveat
669 [22142] libc: [powerpc] printf oupts a wrong value of DBL_MAX on ppc64 and
671 [22145] libc: ttyname() gives up too early in the face of namespaces
672 [22146] math: C++ build issue with float128 on x86_64
673 [22153] nptl: nptl: save error code before process termination
674 [22156] libc: [hppa,ia64,microblaze] Executable stack default
675 [22159] malloc: malloc: MALLOC_CHECK_ broken with --enable-tunables=no
676 [22161] nscd: nscd cache prune for netgroups hangs after timeout bump
677 [22165] libc: [hppa] Text relocations in libc.so
678 [22180] libc: destructor registered via __cxa_atexit is called twice
679 [22183] glob: commit 5554304f0ddd ("posix: Allow glob to match dangling
680 symlinks") cause "make" segfaults
681 [22189] math: [powerpc] math_private.h definitions of math_opt_barrier and
683 [22207] libc: FAIL: stdlib/test-atexit-race
684 [22225] math: nearbyint arithmetic moved before feholdexcept
685 [22229] math: [sparc32] missing copysignl, fabsl, fmal compat symbols
686 [22235] math: iscanonical in C++ and float128
687 [22243] math: log2(0) and log10(0) are wrong in downward rounding without
688 the svid compat wrapper
689 [22244] math: ynf and yn are wrong without the svid compat wrapper
690 [22273] libc: Improper assert in Linux posix_spawn implementation
691 [22284] libc: -pg -pie doesn't work
692 [22292] locale: localedef exits with error 4 when it should be error 1
693 [22294] locale: Allow "" for int_currency_symbol definition in locales.
694 [22295] locale: Don't warn on non-symbolic characters in locale sources in
696 [22296] math: glibc 2.26: signbit build issue with Gcc 5.5.0 on x86_64
697 [22298] nptl: x32: lockups on recursive pthread_mutex_lock after upgrade
699 [22299] dynamic-link: Problem with $PLATFORM on x86_64 platform
700 [22320] glob: Buffer overflow in glob with GLOB_TILDE (CVE-2017-15670)
701 [22321] libc: sysconf(_SC_IOV_MAX) returns -1 on Linux
702 [22322] libc: [mips64] wrong bits/long-double.h installed
703 [22325] glob: Memory leak in glob with GLOB_TILDE (CVE-2017-15671)
704 [22332] glob: Buffer overflow in glob with GLOB_TILDE in unescaping
706 [22336] localedata: cs_CZ LC_COLLATE does not use i18n
707 [22343] malloc: Integer overflow in posix_memalign
708 [22347] libc: getrandom() returns the number of bytes that were copied to
709 the buffer even though the comments say "Return 0 on success and -1 on
711 [22353] string: sysdeps/i386/i586/strcpy.S isn't maintainable
712 [22362] libc: Installed crt1.o, crti,.o and crtn.o files are used with
714 [22370] dynamic-link: Incorrect note padding check
715 [22375] libc: malloc returns pointer from tcache_get when should return
716 NULL (CVE-2017-17426)
717 [22377] math: iseqsig, float128 and C++
718 [22382] localedata: Error in tpi_PG locale
719 [22387] localedata: Replace unicode sequences <Uxxxx> for characters
720 inside the ASCII printable range
721 [22402] math: [powerpc64le] __MATH_TG does not support _Float128 for
723 [22403] localedata: Slash needs escaping in some locales
724 [22408] malloc: malloc_info access heaps without arena lock, ignores heaps
725 [22409] network: res_hnok does not accept some host names used on the
727 [22412] network: res_dnok, res_hnok should perform syntax checks
728 [22413] network: ns_name_pton ignores syntactically invalid trailing
730 [22415] stdio: setvbuf can lead to invalid free/segfault
731 [22432] build: Non-deterministic build
732 [22439] malloc: malloc_info should compute summary statistics for all sub-
734 [22442] network: if_nametoindex could report index for the wrong
736 [22446] build: aliasing violation calling readlink in handle_request
737 [22447] build: unsafe call to strlen with a non-string in getlogin_r.c
738 [22457] libc: Generic preadv/pwritev incorrectly calls __posix_memalign
739 [22459] libc: FAIL: elf/check-localplt with __stack_chk_fail related to
740 __nscd_hash/__nss_hash
741 [22463] network: p_secstodate overflow handling
742 [22469] localedata: pl_PL LC_COLLATE does not use i18n
743 [22478] libc: sigwait can fail with EINTR
744 [22505] libc: ldconfig processes include directive in locale-specific
746 [22515] localedata: hsb_DE LC_COLLATE does not use copy "iso14651_t1"
747 [22517] localedata: et_EE LC_COLLATE does not use copy "iso14651_t1"
748 [22519] localedata: is_IS LC_COLLATE does not use copy "iso14651_t1"
749 [22524] localedata: lt_LT LC_COLLATE does not use copy "iso14651_t1"
750 [22527] localedata: tr_TR LC_COLLATE does not use copy "iso14651_t1"
751 [22534] localedata: Collation rules for Serbian and Bosnian should be the
753 [22561] math: [DR#471] cacosh (0 + iNaN) should return NaN +/- i pi/2
754 [22568] math: [DR#471] ctanh (0 + iNaN), ctanh (0 + i Inf)
755 [22577] libc: missing newline after "cannot allocate TLS data structures
757 [22588] manual: manual/conf.texi: missing underscore in front of
759 [22593] math: nextafter and nexttoward are declared with const attribute
760 [22596] manual: manual: finite(nan) wrongly described as returning nonzero
761 [22603] string: ia64 memchr overflows internal pointer check
762 [22605] libc: SH clone does not set the exit code correctly
763 [22606] dynamic-link: Incorrect array size computation in _dl_init_paths
765 [22607] dynamic-link: Buffer Overflow in _dl_init_paths (CVE-2017-1000409)
766 [22611] malloc: malloc/tst-realloc wrongly assumes that errno must not be
767 modified in case of success
768 [22614] build: gcc: error: unrecognized command line option ‘-no-pie’
769 [22615] manual: manual: ambiguous wording about errno value in case of
771 [22624] libc: MIPS setjmp() saves incorrect 'o0' register in --enable-
773 [22625] dynamic-link: RPATH $ORIGIN replaced by PWD for AT_SECURE/SUID
774 binaries or if /proc is not mounted (CVE-2017-16997)
775 [22627] dynamic-link: $ORIGIN in $LD_LIBRARY_PATH is substituted twice
776 [22630] build: $(no-pie-ldflag) is no longer effective
777 [22631] math: [m68k] Bad const attributes in bits/mathinline.h
778 [22635] nptl: pthread_self returns NULL before libpthread is loaded
779 [22636] nptl: PTHREAD_STACK_MIN is too small on x86-64
780 [22637] nptl: guard size is subtracted from thread stack size instead of
782 [22648] libc: getrlimit/setrlimit with RLIM_INFINITY broken on alpha
783 [22657] localedata: hu_HU: Avoid double space in date
784 [22660] math: fmax, fmin sNaN handling on alpha
785 [22664] libc: New warning of GCC8
786 [22665] math: alpha: ceil and floor raise inexact exceptions
787 [22666] math: alpha: trunc raise inexact exceptions
788 [22667] libc: makecontext lacks stack alignment on i386
789 [22678] libc: prlimit fails for RLIM_INFINITY values on 32-bit machines
790 [22679] libc: getcwd(3) can succeed without returning an absolute path
792 [22685] libc: PowerPC: Static AT_SECURE binaries segfault with lock-
794 [22687] math: [powerpc-nofpu] complex long double functions spurious
796 [22688] math: [powerpc-nofpu] remainderl wrong sign of zero result
797 [22690] math: [ldbl-128ibm] lrintl, lroundl missing "invalid" exceptions
798 [22691] math: [powerpc-nofpu] fmaxmagl, fminmagl spurious "invalid"
800 [22693] math: [ldbl-128ibm] log1pl (-qNaN) spurious "invalid" exception
801 [22697] math: [powerpc] llround spurious "inexact" exceptions on 32-bit
803 [22701] nis: Incomplete removal of libnsl
804 [22702] math: [powerpc-nofpu] nearbyintl traps with trapping "inexact"
805 [22707] libc: Missing defines in elf.h for DF_1_STUB and DF_1_PIE.
806 [22715] dynamic-link: FAIL: elf/tst-audit10
807 [22719] libc: Backtrace tests fail on hppa
808 [22742] libc: [aarch64] mcontext_t __reserved field got renamed
809 [22743] nptl: __pthread_register_cancel corrupts stack after f81ddabffd
810 [22765] crypt: (struct crypt_data *data)->initialized is not set to zero
811 before the first call to crypt_r () in crypt/badsalttest.c
818 * A per-thread cache has been added to malloc. Access to the cache requires
819 no locks and therefore significantly accelerates the fast path to allocate
820 and free small amounts of memory. Refilling an empty cache requires locking
821 the underlying arena. Performance measurements show significant gains in a
822 wide variety of user workloads. Workloads were captured using a special
823 instrumented malloc and analyzed with a malloc simulator. Contributed by
824 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
826 * Unicode 10.0.0 Support: Character encoding, character type info, and
827 transliteration tables are all updated to Unicode 10.0.0, using
828 generator scripts contributed by Mike FABIAN (Red Hat).
829 These updates cause user visible changes, especially the changes in
830 wcwidth for many emoji characters cause problems when emoji sequences
831 are rendered with pango, see for example:
832 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
834 * Collation of Hungarian has been overhauled and is now consistent with "The
835 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
838 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
840 - The GNU C Library will now detect when /etc/resolv.conf has been
841 modified and reload the changed configuration. The new resolver option
842 “no-reload” (RES_NORELOAD) disables this behavior.
844 - The GNU C Library now supports an arbitrary number of search domains
845 (configured using the “search” directive in /etc/resolv.conf);
846 previously, there was a hard limit of six domains. For backward
847 compatibility, applications that directly modify the ‘_res’ global
848 object are still limited to six search domains.
850 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
851 Library will now randomly pick a name server from the configuration as a
852 starting point. (Previously, the second name server was always used.)
854 * The tunables feature is now enabled by default. This allows users to tweak
855 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
857 * New function reallocarray, which resizes an allocated block (like realloc)
858 to the product of two sizes, with a guaranteed clean failure upon integer
859 overflow in the multiplication. Originally from OpenBSD, contributed by
860 Dennis Wölfing and Rüdiger Sonderfeld.
862 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
863 These are extended versions of preadv and pwritev, respectively, taking an
864 additional flags argument. The set of supported flags depends on the
865 running kernel; full support currently requires kernel 4.7 or later.
867 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
868 create a new session ID for the spawned process. This feature is
869 scheduled to be added to the next major revision of POSIX; for the time
870 being, it is available under _GNU_SOURCE.
872 * errno.h is now safe to use from C-preprocessed assembly language on all
873 supported operating systems. In this context, it will only define the
874 Exxxx constants, as preprocessor macros expanding to integer literals.
876 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
877 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
878 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
879 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
881 To compile programs that use this feature, the compiler must support
882 128-bit floating point with the type name _Float128 (as defined by TS
883 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
884 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
885 must be defined to make the new interfaces visible.
887 The new functions and macros correspond to those present for other
888 floating-point types (except for a few obsolescent interfaces not
889 supported for the new type), with F128 or f128 suffixes; for example,
890 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
891 printf or scanf formats for the new type; the strfromf128 and strtof128
892 interfaces should be used instead.
894 Deprecated and removed features, and other changes affecting compatibility:
896 * The synchronization that pthread_spin_unlock performs has been changed to
897 now be equivalent to a C11 atomic store with release memory order to the
898 spin lock's memory location. Previously, several (but not all)
899 architectures used stronger synchronization (e.g., containing what is
900 often called a full barrier). This change can improve performance, but
901 may affect odd fringe uses of spin locks that depend on the previous
902 behavior (e.g., using spin locks as atomic variables to try to implement
903 Dekker's mutual exclusion algorithm).
905 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
908 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
909 will only be built and installed when the GNU C Library is configured with
910 --enable-obsolete-rpc. This allows alternative RPC implementations, such
911 as TIRPC or rpcsvc-proto, to be used.
913 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
914 libnss_compat, are deprecated, and will not be built or installed by
917 The NIS(+) support library, libnsl, is also deprecated. By default, a
918 compatibility shared library will be built and installed, but not headers
919 or development libraries. Only a few NIS-related programs require this
920 library. (In particular, the GNU C Library has never required programs
921 that use 'gethostbyname' to be linked with libnsl.)
923 Replacement implementations based on TIRPC, which additionally support
924 IPv6, are available from <https://github.com/thkukuk/>. The configure
925 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
926 name service modules, to be built and installed.
928 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
929 support is enabled, the configured recursive resolver must support EDNS.
930 (Responding to EDNS-enabled queries with responses which are not
931 EDNS-enabled is fine, but FORMERR responses are not.)
933 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
934 servers have not supported this opcode for a long time.
936 * The _res_opcodes variable has been removed from libresolv. It had been
937 exported by accident.
939 * <string.h> no longer includes inline versions of any string functions,
940 as this kind of optimization is better done by the compiler. The macros
941 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
943 * The nonstandard header <xlocale.h> has been removed. Most programs should
944 use <locale.h> instead. If you have a specific need for the definition of
945 locale_t with no other declarations, please contact
946 libc-alpha@sourceware.org and explain.
948 * The obsolete header <sys/ultrasound.h> has been removed.
950 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
952 * The obsolete function cfree has been removed. Applications should use
955 * The stack_t type no longer has the name struct sigaltstack. This changes
956 the C++ name mangling for interfaces involving this type.
958 * The ucontext_t type no longer has the name struct ucontext. This changes
959 the C++ name mangling for interfaces involving this type.
961 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
962 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
963 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
964 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
965 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
966 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
967 fpregset_t type no longer has the name struct fpu. This changes the C++
968 name mangling for interfaces involving those types.
970 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
971 synced with the kernel:
973 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
974 are not supported on this architecture and have been removed.
976 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
977 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
978 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
980 Programs that assume the GET/SETREGS ptrace requests are universally
981 available will now fail to build, instead of malfunctioning at runtime.
983 Changes to build and runtime requirements:
985 * Linux kernel 3.2 or later is required at runtime, on all architectures
986 supported by that kernel. (This is a change from version 2.25 only for
989 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
991 * On most architectures, GCC 4.9 or later is required to build the GNU C
992 Library. On powerpc64le, GCC 6.2 or later is required.
994 Older GCC versions and non-GNU compilers are still supported when
995 compiling programs that use the GNU C Library. (We do not know exactly
996 how old, and some GNU extensions to C may be _de facto_ required. If you
997 are interested in helping us make this statement less vague, please
998 contact libc-alpha@sourceware.org.)
1000 Security related changes:
1002 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
1003 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
1005 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
1006 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
1008 * Avoid printing a backtrace from the __stack_chk_fail function since it is
1009 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
1012 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
1013 fixed (CVE-2017-12133).
1015 The following bugs are resolved with this release:
1017 [984] network: Respond to changed resolv.conf in gethostbyname
1018 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
1019 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
1021 [12189] libc: __stack_chk_fail should not attempt a backtrace
1023 [14096] time: Race condition on timezone/tst-timezone.out
1024 [14172] localedata: az_IR: new locale
1025 [14995] build: glibc fails to build if gold is the default linker, even if
1027 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
1028 [16637] network: inet_pton function is accepting IPv6 with bad format
1029 [16640] string: string/strtok.c: undefined behaviour inconsistent between
1030 x86 and other generic code
1031 [16875] localedata: ko_KR: fix lang_name
1032 [17225] localedata: ar_SY: localized month names for May and June are
1034 [17297] localedata: da_DK: wrong date_fmt string
1035 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
1036 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
1037 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
1038 [19066] localedata: ar_SA abbreviated day and month names are in English
1039 [19569] network: resolv: Support an arbitrary number of search domains
1040 [19570] network: Implement random DNS server selection in the stub
1042 [19838] locale: localedef fails on PA-RISC
1043 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
1044 order of 0D36 and 0D37
1045 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
1047 [20098] libc: FAIL: debug/backtrace-tst on hppa
1048 [20257] network: sunrpc: clntudp_call does not enforce timeout when
1050 [20275] localedata: locale day/abday/mon/abmon should not have trailing
1052 [20313] localedata: Update locale data to Unicode 9.0
1053 [20424] manual: Document how to provide a malloc replacement
1054 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
1056 [20686] locale: Add el_GR@euro to SUPPORTED.
1057 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
1058 failures consistently
1059 [21015] dynamic-link: Document and fix --enable-bind-now
1060 [21016] nptl: pthread_cond support is broken on hppa
1061 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
1062 frame-pointer on i386
1063 [21049] libc: segfault in longjmp_chk() due to clobbered processor
1065 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
1066 [21088] libc: Build fails with --enable-static-nss
1067 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
1068 generic c code is used
1069 [21109] libc: Tunables broken on big-endian
1070 [21112] math: powf has large ulp errors with base close to 1 and exponent
1072 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
1074 [21120] malloc: glibc malloc is incompatible with GCC 7
1075 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
1077 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
1078 (-0.0) when linking with -lieee
1079 [21171] math: log10, log2 and lgamma return incorrect results
1080 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
1081 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
1082 [21207] localedata: ce_RU: update weekdays from CLDR
1083 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
1084 [21217] localedata: Update months from CLDR-31
1085 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
1086 [21243] libc: support_delete_temp_file should issue warning for failed
1088 [21244] libc: support resolv_test_start() socket fd close should be
1090 [21253] libc: localedef randomly segfaults when using -fstack-check due to
1091 new posix_spawn implementation
1092 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
1093 leads to lower CPU frequency
1094 [21259] libc: [alpha] termios.h missing IXANY for POSIX
1095 [21261] libc: [sparc64] bits/setjmp.h namespace
1096 [21267] network: [mips] bits/socket.h IOC* namespace
1097 [21268] libc: [alpha] termios.h NL2, NL3 namespace
1098 [21270] libc: mmap64 silently truncates large offset values
1099 [21275] libc: posix_spawn always crashes on ia64 now
1100 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
1101 [21280] math: [powerpc] logbl for POWER7 return incorrect results
1102 [21289] libc: Incorrect declaration for 32-bit platforms with
1103 _FILE_OFFSET_BITS=64 causes build error
1104 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
1105 not support gethostbyname4_r
1106 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
1108 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
1110 [21340] libc: Support POSIX_SPAWN_SETSID
1111 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
1112 [21359] network: ns_name_pack needs additional byte in destination buffer
1113 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
1114 against fragmentation attacks (CVE-2017-12132)
1115 [21369] network: resolv: Remove EDNS fallback
1116 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
1118 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
1119 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
1120 [21393] stdio: Missing dup3 error check in freopen, freopen64
1121 [21396] libc: Use AVX2 memcpy/memset on Skylake server
1122 [21399] localedata: Bad description for U00EC in
1123 localedata/charmaps/CP1254
1124 [21411] malloc: realloc documentation error
1125 [21426] network: sys/socket.h uio.h namespace
1126 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
1127 [21445] libc: signal.h bsd_signal namespace
1128 [21455] network: Network headers stdint.h namespace
1129 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
1131 [21475] network: resolv: Overlong search path is truncated mid-label
1132 [21511] libc: sigstack namespace
1133 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
1134 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
1135 bits/syscall.h: No such file or directory
1136 [21517] libc: struct sigaltstack namespace
1137 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
1138 [21533] localedata: Update locale data to Unicode 10.0
1140 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
1141 junk at end of line, first unrecognized character is `@'
1142 [21538] libc: SIG_HOLD missing for XPG4
1143 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
1144 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
1145 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
1146 [21543] libc: sigevent namespace
1147 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
1148 size for general purpose registers in mcontext_t structure
1149 [21550] libc: sigwait namespace
1150 [21552] libc: XPG4 bsd_signal namespace
1151 [21554] libc: sigpause namespace
1152 [21560] libc: sys/wait.h signal.h namespace
1153 [21561] libc: waitid namespace
1154 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
1155 '/usr/include/stdlib.h': Permission denied
1156 [21575] libc: sys/wait.h missing struct rusage definition
1157 [21584] libc: sigaltstack etc namespace
1158 [21597] libc: siginterrupt namespace
1159 [21607] math: hppa: FAIL: math/test-tgmath
1160 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
1162 [21622] libc: [tile] missing SA_* for POSIX.1:2008
1163 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
1164 stack and heap (CVE-2017-1000366)
1165 [21625] libc: wait3 namespace
1166 [21654] nss: Incorrect pointer alignment in NSS group merge result
1168 [21657] network: Parse interface zone id for node-local multicast
1169 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
1171 [21666] libc: .symver is used on common symbol
1172 [21668] network: resolv: res_init cross-thread broadcast introduces race
1174 [21687] math: tgmath.h totalorder, totalordermag return type
1175 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
1177 [21696] libc: Incorrect assumption of of __cpu_mask in
1178 posix/sched_cpucount.c
1179 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
1180 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
1182 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
1183 leading to relocation crash
1184 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
1185 `resolv_conf_matches (resp, conf)' failed.
1186 [21710] localedata: Added Samoan language locale for Samoa
1187 [21711] localedata: Pashto yesstr/nostr locale are missing
1188 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
1189 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
1190 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
1191 [21723] localedata: yesstr/nostr missing for Chinese language locale
1192 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
1194 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
1196 [21728] localedata: New Locale for Tongan language
1197 [21729] localedata: incorrect LC_NAME fields for hi_IN
1198 [21733] localedata: yesstr and nostr are missing for zh_HK
1199 [21734] localedata: Missing yesstr and nostr are for kw_GB
1200 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
1201 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
1202 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
1203 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
1205 [21744] libc: Tests failing on --enable-tunables --enable-stack-
1207 [21749] localedata: Wrong abbreviated day name (“abday”) for
1209 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
1210 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
1211 [21759] localedata: missing yesstr and nostr for Tigrinya
1212 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
1213 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
1214 [21767] localedata: Missing Bislama locales
1215 [21768] localedata: Missing yesstr and nostr for aa_ET
1216 [21770] localedata: Missing Field in li_NL
1217 [21778] nptl: Robust mutex may deadlock
1218 [21779] libc: MicroBlaze segfaults when loading libpthread
1219 [21783] localedata: Fix int_select international_call_prefixes
1220 [21784] localedata: Inconsistency in country_isbn
1221 [21788] localedata: Missing Country Postal Abbreviations
1222 [21794] localedata: Added-country_isbn-for-Italy
1223 [21795] localedata: Add/Fix country_isbn for France
1224 [21796] localedata: Added country_isbn for Republic of Korea
1225 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
1226 [21799] localedata: Added int_select international_call_prefixes
1227 [21801] localedata: Added int_select international_call_prefixes
1228 [21804] nptl: Double semicolon in thread-shared-types.h
1229 [21807] localedata: LC_ADDRESS fix for pap_CW
1230 [21808] localedata: Fix LC_ADDRESS for pap_AW
1231 [21821] localedata: Added country_name in mai_IN
1232 [21822] localedata: Fix LC_TIME for mai_IN
1233 [21823] localedata: missing yesstr, nostr for sa_IN
1234 [21825] localedata: Fix name_mrs for mag_IN
1235 [21828] localedata: 2.26 changelog should mention user visible changes
1237 [21835] localedata: Added Maithili language locale for Nepal
1238 [21838] localedata: Removed redundant data for the_NP
1239 [21839] localedata: Fix LC_MONETARY for ta_LK
1240 [21844] localedata: Fix Latin characters and Months Sequence.
1241 [21848] localedata: Fix mai_NP Title Name
1246 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
1247 24731-2:2010, is supported to enable declarations of functions from that
1248 TR. Note that not all functions from that TR are supported by the GNU C
1251 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
1252 18661-1:2014, is supported to enable declarations of functions and macros
1253 from that TS. Note that not all features from that TS are supported by
1256 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
1257 18661-4:2015, is supported to enable declarations of functions and macros
1258 from that TS. Note that most features from that TS are not supported by
1261 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
1262 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
1263 Since the GNU C Library defaults to a much newer revision of POSIX, this
1264 will only affect programs that specifically request an old conformance
1265 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
1266 see a change in the visible declarations, but a program compiled with
1267 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
1270 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
1271 defined by all multithreaded code, but glibc has not required this for
1274 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
1275 means that in a future release, the macros “major”, “minor”, and “makedev”
1276 will only be available from <sys/sysmacros.h>.
1278 These macros are not part of POSIX nor XSI, and their names frequently
1279 collide with user code; see for instance glibc bug 19239 and Red Hat bug
1280 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
1281 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
1284 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
1285 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
1286 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
1288 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
1289 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
1290 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
1291 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
1292 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
1293 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
1294 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
1295 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
1296 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
1297 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
1298 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
1301 * New <math.h> features are added from TS 18661-1:2014:
1303 - Signaling NaN macros: SNANF, SNAN, SNANL.
1305 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
1306 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
1307 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
1309 - llogb functions: the llogb, llogbf and llogbl functions, and the
1310 FP_LLOGB0 and FP_LLOGBNAN macros.
1312 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
1315 - Comparison macros: iseqsig.
1317 - Classification macros: iscanonical, issubnormal, iszero.
1319 - Total order functions: totalorder, totalorderf, totalorderl,
1320 totalordermag, totalordermagf, totalordermagl.
1322 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
1324 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
1325 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
1327 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
1328 are added to libc. They convert a floating-point number into string.
1330 * Most of glibc can now be built with the stack smashing protector enabled.
1331 It is recommended to build glibc with --enable-stack-protector=strong.
1332 Implemented by Nick Alcock (Oracle).
1334 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
1335 intended to be used instead of memset() to erase sensitive data after use;
1336 the compiler will not optimize out calls to explicit_bzero even if they
1337 are "unnecessary" (in the sense that no _correct_ program can observe the
1338 effects of the memory clear).
1340 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
1341 to float instead of double. This does not affect the ABI of any libraries
1342 that are part of the GNU C Library, but may affect the ABI of other
1343 libraries that use this type in their interfaces.
1345 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
1346 float_t and double_t types are now defined to long double instead of float
1347 and double. These options are not the default, and this does not affect
1348 the ABI of any libraries that are part of the GNU C Library, but it may
1349 affect the ABI of other libraries that use this type in their interfaces,
1350 if they are compiled or used with those options.
1352 * The getentropy and getrandom functions, and the <sys/random.h> header file
1355 * The buffer size for byte-oriented stdio streams is now limited to 8192
1356 bytes by default. Previously, on Linux, the default buffer size on most
1357 file systems was 4096 bytes (and thus remains unchanged), except on
1358 network file systems, where the buffer size was unpredictable and could be
1359 as large as several megabytes.
1361 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
1362 for the Linux quota interface which predates kernel version 2.4.22 has
1365 * The malloc_get_state and malloc_set_state functions have been removed.
1366 Already-existing binaries that dynamically link to these functions will
1367 get a hidden implementation in which malloc_get_state is a stub. As far
1368 as we know, these functions are used only by GNU Emacs and this change
1369 will not adversely affect already-built Emacs executables. Any undumped
1370 Emacs executables, which normally exist only during an Emacs build, should
1371 be rebuilt by re-running “./configure; make” in the Emacs build tree.
1373 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
1374 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
1375 “no-ip6-dotint” had already been the default, and support for the
1376 “ip6-dotint” option was removed from the Internet in 2006.
1378 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
1379 flag from <resolv.h> have been removed. The option relied on a
1380 backwards-incompatible DNS extension which was never deployed on the
1383 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
1384 RES_BLAST defined in the <resolv.h> header file have been deprecated.
1385 They were already unimplemented.
1387 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
1388 _res.flags are deprecated. The flag was standardized in RFC 2133, but
1389 removed again from the IETF name lookup interface specification in RFC
1390 2553. Applications should use getaddrinfo instead.
1392 * DNSSEC-related declarations and definitions have been removed from the
1393 <arpa/nameser.h> header file, and libresolv will no longer attempt to
1394 decode the data part of DNSSEC record types. Previous versions of glibc
1395 only implemented minimal support for the previous version of DNSSEC, which
1396 is incompatible with the currently deployed version.
1398 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
1399 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
1400 <arpa/nameser.h> header file because the distinction between RR types and
1401 meta-RR types is not officially standardized, subject to revision, and
1402 thus not suitable for encoding in a macro.
1404 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
1405 and rhook members of the res_state type in <resolv.h> have been removed.
1406 The glibc stub resolver did not support these hooks, but the header file
1407 did not reflect that.
1409 * For multi-arch support it is recommended to use a GCC which has
1410 been built with support for GNU indirect functions. This ensures
1411 that correct debugging information is generated for functions
1412 selected by IFUNC resolvers. This support can either be enabled by
1413 configuring GCC with '--enable-gnu-indirect-function', or by
1414 enabling it by default by setting 'default_gnu_indirect_function'
1415 variable for a particular architecture in the GCC source file
1418 * GDB pretty printers have been added for mutex and condition variable
1419 structures in POSIX Threads. When installed and loaded in gdb these pretty
1420 printers show various pthread variables in human-readable form when read
1421 using the 'print' or 'display' commands in gdb.
1423 * Tunables feature added to allow tweaking of the runtime for an application
1424 program. This feature can be enabled with the '--enable-tunables' configure
1425 flag. The GNU C Library manual has details on usage and README.tunables has
1426 instructions on adding new tunables to the library.
1428 * A new version of condition variables functions have been implemented in
1429 the NPTL implementation of POSIX Threads to provide stronger ordering
1432 * A new version of pthread_rwlock functions have been implemented to use a more
1433 scalable algorithm primarily through not using a critical section anymore to
1436 Security related changes:
1438 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
1439 have been created with makecontext could fail to terminate due to a
1440 missing .cantunwind annotation. This has been observed to lead to a hang
1441 (denial of service) in some Go applications compiled with gccgo. Reported
1442 by Andreas Schwab. (CVE-2016-6323)
1444 * The DNS stub resolver functions would crash due to a NULL pointer
1445 dereference when processing a query with a valid DNS question type which
1446 was used internally in the implementation. The stub resolver now uses a
1447 question type which is outside the range of valid question type values.
1450 The following bugs are resolved with this release:
1452 [4099] stdio: Overly agressive caching by stream i/o functions.
1453 [7065] build: Support building glibc with -fstack-protector or -fstack-
1455 [9842] localedata: en_CA: incorrect date format
1456 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
1457 before it started waiting
1458 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
1459 [15765] nptl: sem_open is wrongly a cancellation point
1460 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
1461 [16458] libc: endian.h and netinet/in.h byte order macros return values of
1463 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
1464 library linked with pthread
1465 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
1466 "FIXME: Ingo" issue)
1467 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
1468 [17252] libc: getrandom and getentropy syscall
1469 [17730] malloc: thread-local storage is sometimes improperly free()'d
1470 after being __libc_memalign()'d
1471 [18241] stdio: failed fseek on memstream does not set errno and can fail
1473 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
1475 [18463] nptl: pthread_cond_broadcast issue when surrounded by
1476 PTHREAD_PRIO_INHERIT mutex on ARM
1477 [18784] network: res_query and related function crash for special record
1478 type queries (CVE-2015-5180)
1479 [19380] math: strtod does not raise "inexact"
1480 [19387] string: Integer overflow in memchr
1481 [19390] string: Integer overflow in strncat
1482 [19398] build: linknamespace tests fail with massively parallel build
1483 [19402] nptl: Deadlock with robust shared mutex and asynchronous
1485 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
1486 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
1487 [19514] libc: [PATCH] Fix spelling errors in spelling
1488 "implement"/"implementation" in several places
1489 [19582] network: Deprecate RES_USE_INET6
1490 [19673] manual: clog10 docs appear to be erroneous
1491 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
1492 causes a segmentation fault
1493 [19826] libc: invalid pointer returned from __tls_get_addr with static
1495 [20016] network: resolv: Remove hooks support from the API
1496 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
1498 [20033] math: [x86_64] vectorized math function don't call the __finite
1500 [20116] nptl: use after free in pthread_create
1501 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
1502 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
1504 [20311] nptl: please install proc_service.h
1505 [20366] libc: Compilation errors in installed headers in strict-compliance
1507 [20370] malloc: malloc: Arena free list management is still racy
1508 (incorrect fix in bug 19243)
1509 [20386] libc: assert (X = 0) does not result in GCC warning
1510 [20432] malloc: malloc: Minimize interface required for interposition
1511 [20435] libc: Missing unwind info in __startcontext causes infinite loop
1512 in _Unwind_Backtrace (CVE-2016-6323)
1513 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
1514 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
1516 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
1517 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
1518 [20477] network: resolv: incorrect double-checked locking related to
1520 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
1522 [20495] math: x86_64 performance degradation due to AVX/SSE transition
1524 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
1525 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
1526 cause transition penalty
1527 [20517] math: sparcv9 missing fdiml compat symbol
1528 [20524] manual: strverscmp is inconsistent
1529 [20525] libc: <sys/quota.h> should be based on kernel headers
1530 [20539] math: GCC 7 -static -lm fails to link at -O3
1531 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
1533 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
1535 [20591] network: Remove obsolete DNSSEC support
1536 [20592] network: DNS resource record type classification macros in
1537 <arpa/nameser.h> are incorrect
1538 [20593] network: Update DNS RR type definitions
1539 [20611] network: getaddrinfo accepts invalid numeric scope IDs
1540 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
1542 [20629] network: libresolv: Remove support for bitstring labels
1544 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
1545 assertion: "maxidx >= 2"
1546 [20660] math: [arm] Use VSQRT
1547 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
1548 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
1549 [20689] libc: Test for FMA should also check for AVX.
1550 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
1551 [20715] math: iszero macro breaks existing code
1552 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
1553 [20728] libc: powerpc: Missing TOC stub in clone
1554 [20729] build: glibc-2.24 fails to build for i486 with -Os
1555 [20750] build: Build fails with default PIE enabled gcc-6.x
1556 [20768] math: [alpha] sqrt fegetenv namespace
1557 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
1559 [20787] math: float_t is defined as float incorrectly on x86_64 even if
1560 __FLT_EVAL_METHOD__ is 2
1561 [20790] network: rpcgen buffer overrun in get_prog_declaration
1562 [20822] nptl: race condition in __lll_unlock_elision on powerpc
1563 [20829] libc: crypt snprintf namespace
1564 [20847] libc: tst-vfork3 failure
1565 [20855] math: Default bits/mathdef.h has inappropriate float_t
1566 [20859] math: [sh4] FP_ILOGB0 invalid
1567 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
1568 U+20AC), not same as GBK
1569 [20915] dynamic-link: global-dynamic TLS broken on aarch64
1570 [20916] math: pow handling of sNaN arguments
1571 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
1572 [20919] math: Bad pow (qNaN, 0) result with -lieee
1573 [20940] math: hypot sNaN handling
1574 [20947] math: fmax, fmin sNaN handling
1575 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
1576 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
1578 [20971] string: powerpc64/power7 memchr overflows internal pointer check
1579 [20973] nptl: robust mutexes: Lost wake-ups
1580 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
1581 [20978] nis: strlen on null pointer in nss_nisplus
1582 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
1584 [21014] string: i686 memchr overflows internal pointer check
1585 [21019] libc: [mips] n32 lseek incorrect on overflow
1586 [21022] libc: [microblaze] __backtrace get_frame_size namespace
1587 [21026] libc: [MIPS] readahead syscall is broken on n64
1588 [21028] math: Fallback fesetexceptflag should always succeed
1589 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
1590 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
1592 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
1593 [21061] librt: [microblaze] librt lost clock_* exports
1594 [21073] libc: tunables: insecure environment variables passed to
1595 subprocesses with AT_SECURE
1596 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
1600 * The minimum Linux kernel version that this version of the GNU C Library
1601 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
1602 kernel version 2.6.32 or later suffices (on architectures that already
1603 required kernel versions more recent than 3.2, those requirements remain
1604 unchanged). Linux 3.2 or later kernel headers are required on all
1607 * The pap_AN locale has been deleted. This has been deprecated for a long
1608 time. It has been replaced by pap_AW & pap_CW, both of which have long
1609 been included in previous releases.
1611 * The readdir_r and readdir64_r functions have been deprecated. It is
1612 recommended to use readdir and readdir64 instead.
1614 * The type “union wait” has been removed. It was deprecated in the early
1615 1990s and never part of POSIX. Application code should use the int type
1616 instead of “union wait”.
1618 * A new NSS action is added to facilitate large distributed system
1619 administration. The action, MERGE, allows remote user stores like LDAP
1620 to be merged into local user stores like /etc/groups in order to provide
1621 easy to use, updated, and managed sets of merged credentials. The new
1622 action can be used by configuring it in /etc/nsswitch.conf:
1623 group: files [SUCCESS=merge] nis
1624 Implemented by Stephen Gallagher (Red Hat).
1626 * The deprecated __malloc_initialize_hook variable has been removed from the
1629 * The long unused localedef --old-style option has been removed. It hasn't
1630 done anything in over 16 years. Scripts using this option can safely
1633 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
1634 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
1635 return the next representable value in the direction of positive infinity
1636 and the nextdown functions return the next representable value in the
1637 direction of negative infinity. These are currently enabled as GNU
1640 Security related changes:
1642 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
1643 could result in a stack overflow when getnetbyname was called with an
1644 overly long name. (CVE-2016-3075)
1646 * Previously, getaddrinfo copied large amounts of address data to the stack,
1647 even after the fix for CVE-2013-4458 has been applied, potentially
1648 resulting in a stack overflow. getaddrinfo now uses a heap allocation
1649 instead. Reported by Michael Petlan. (CVE-2016-3706)
1651 * The glob function suffered from a stack-based buffer overflow when it was
1652 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
1653 Reported by Alexander Cherepanov. (CVE-2016-1234)
1655 * The Sun RPC UDP client could exhaust all available stack space when
1656 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
1657 alloca plugin for GCC. (CVE-2016-4429)
1659 * The IPv6 name server management code in libresolv could result in a memory
1660 leak for each thread which is created, performs a failing naming lookup,
1661 and exits. Over time, this could result in a denial of service due to
1662 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
1664 The following bugs are resolved with this release:
1666 [1170] localedata: ne_NP: update Nepali locale definition file
1667 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
1669 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
1670 [6796] math: fdim() does not set errno on overflow
1671 [10354] libc: posix_spawn should use vfork() in more cases than presently
1672 [11213] localedata: localedata: add copyright disclaimer to locale files
1673 [12143] localedata: chr_US: new Cherokee locale
1674 [12450] localedata: sgs_LT: new locale
1675 [12676] localedata: ln_CD: new locale
1676 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
1678 [13304] math: fma, fmaf, fmal produce wrong results
1679 [14259] build: --localedir arg to configure is ignored
1680 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
1681 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
1682 [14934] localedata: es_CL: wrong first weekday chilean locale
1683 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
1685 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
1687 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
1688 [15368] nptl: raise() is not async-signal-safe
1689 [15479] math: ceil, floor, round and trunc raise inexact exception
1690 [15578] localedata: kk_KZ: various updates
1691 [16003] localedata: pap_AN: punt old locale
1692 [16137] localedata: iw_IL: punt old locale
1693 [16190] localedata: eo: new esperanto locale
1694 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
1695 [16742] malloc: race condition: pthread_atfork() called before first
1696 malloc() results in unexpected locking behaviour/deadlocks
1697 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
1699 [16983] localedata: postal_fmt does not allow %l and %n modifiers
1700 [17565] localedata: pt_PT: wrong (work-)week start
1701 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
1702 [17950] build: Build fails with -msse
1703 [18205] localedata: be_BY*: wrong first_weekday and first_workday
1704 [18433] libc: posix_spawn does not return correctly upon failure to
1706 [18453] localedata: charmaps/IBM875: incorrect codes
1707 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
1709 [18896] localedata: he_IL: improvements for currency
1710 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
1711 Romanian locale data
1712 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
1714 [19056] libc: Deprecate readdir_r
1715 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
1717 [19198] localedata: nl_NL: small improvements for Dutch locales
1718 [19257] network: Per-thread memory leak in __res_vinit with IPv6
1719 nameservers (CVE-2016-5417)
1720 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
1722 [19400] locale: Language missing in "iso-639.def", trivial fix in
1724 [19431] malloc: Deadlock between fflush, getdelim, and fork
1725 [19505] libc: Incorrect file descriptor validity checks in
1726 posix_spawn_file_actions_add{open,close,dup2}
1727 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
1728 when using RTLD_NEXT
1729 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
1730 `intl/{gettextP,loadinfo}.h'
1731 [19534] libc: execle, execlp may use malloc
1732 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
1733 [19573] network: res_nclose and __res_maybe_init disagree about name
1734 server initialization, breaking Hesiod
1735 [19575] localedata: Status of GB18030 tables
1736 [19581] localedata: sr_* date_fmt string contains additional newline
1737 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
1739 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
1740 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
1741 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
1742 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
1744 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
1746 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
1748 [19610] dynamic-link: ldconfig -X removes stale symbolic links
1749 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
1750 [19633] locale: strfmon_l applies global locale to number formatting
1751 [19642] network: Memory leak in getnameinfo
1752 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
1753 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
1755 [19654] math: [x86_64] Need testcase for BZ #19590 fix
1756 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
1758 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
1759 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
1761 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
1763 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
1765 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
1766 pointers and lengths in error-case.
1767 [19727] locale: Converting from/to UTF-xx with iconv() does not always
1768 report errors on UTF-16 surrogates values.
1769 [19755] nscd: nscd assertion failure in gc
1770 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
1771 [19759] libc: mempcpy shouldn't be inlined
1772 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
1773 [19765] libc: s390 needs an optimized mempcpy
1774 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1775 NAME_MAX limit assumption (CVE-2016-1234)
1776 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1777 [19787] network: Missing and incorrect truncation checks in getnameinfo
1778 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1780 [19791] network: Assertion failure in res_query.c with un-connectable name
1782 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1783 [19822] math: libm.so install clobbers old version
1784 [19825] network: resolv: send_vc can return uninitialized data in second
1785 response to getaddrinfo
1786 [19830] network: nss_dns: should check RDATA length against buffer length
1787 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1788 confronted with A/AAAA records of invalid size
1789 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1790 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1791 [19853] stdio: Printing IBM long double in decimal with high precision is
1793 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1794 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1795 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1797 [19865] network: Assertion failure or memory leak in
1798 _nss_dns_getcanonname_r
1799 [19868] network: nss_dns: netent code does not skip over non-PTR records
1800 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1802 [19881] string: Improve x86-64 memset
1803 [19907] string: Incorrect memcpy tests
1804 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1806 [19925] libc: termios.h XCASE namespace
1807 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1808 [19929] libc: limits.h NL_NMAX namespace
1809 [19931] stdio: Memory leak in vfprintf
1810 [19957] libc: clone(CLONE_VM) access invalid parent memory
1811 [19963] localedata: en_IL: New locale
1812 [19989] stdio: stdio.h cuserid namespace
1813 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1815 [19996] locale: langinfo.h nl_langinfo_l namespace
1816 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1817 [20010] network: getaddrinfo: Stack overflow in hostent translation
1819 [20012] stdio: libio: fmemopen append mode failure
1820 [20014] stdio: stdio.h namespace for pre-threads POSIX
1821 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1822 [20023] libc: fcntl.h timespec namespace
1823 [20024] math: [x86_64] vectorized sincos trashes the stack
1824 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1825 [20041] time: sys/time.h timespec namespace
1826 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1827 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1828 [20051] libc: ttyslot in wrong header under wrong conditions
1829 [20054] libc: gethostname not declared for XPG4
1830 [20055] libc: termios.h missing tcgetsid for XPG4
1831 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1833 [20073] libc: sys/stat.h fchmod namespace
1834 [20074] libc: stdlib.h rand_r namespace
1835 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1836 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1838 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1839 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1841 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1842 [20119] libc: Wrong mask for processors level type from CPUID
1843 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1844 AS not supporting AVX512
1845 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1847 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1848 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1850 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1851 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1852 [20178] libc: posix_spawn{p} should not call exit
1853 [20191] stdio: libio: vtables hardening
1854 [20195] string: FMA4 detection requires CPUID execution with register
1856 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1857 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1859 [20212] math: acos (sNaN) returns sNaN
1860 [20213] math: asin (sNaN) returns sNaN
1861 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1862 [20218] math: [i386] asinhl (sNaN) returns sNaN
1863 [20219] math: [i386] atanhl (sNaN) returns sNaN
1864 [20222] stdio: fopencookie: Mangle function pointers
1865 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1866 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1867 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1869 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1870 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1871 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1872 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1873 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1874 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1875 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1876 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1877 [20240] math: modf (sNaN) returns sNaN
1878 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1879 [20250] math: frexp (sNaN) returns sNaN
1880 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1881 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1883 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1884 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1885 subscript is below array bounds [-Werror=array-bounds]
1886 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1887 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1889 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1890 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1892 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1893 "invalid" exceptions
1894 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1895 [20316] localedata: id_ID: Februari instead of Pebruari
1896 [20327] string: POWER8 strcasecmp returns incorrect result
1897 [20347] math: Failure: Test: j0_downward (0xap+0)
1898 [20348] libc: FAIL: misc/tst-preadvwritev64
1899 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1900 [20350] libc: There is no test for p{read,write}64
1901 [20357] math: Incorrect cos result for 1.5174239687223976
1902 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1906 * Unicode 8.0.0 Support: Character encoding, character type info, and
1907 transliteration tables are all updated to Unicode 8.0.0, using new
1908 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1909 These updates cause user visible changes, such as the fixes for bugs
1910 89, 16061, and 18568.
1912 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1913 kernel-internal CPU set size. This means that requests that change the
1914 CPU affinity which failed before (for example, an all-ones CPU mask) will
1915 now succeed. Applications that need to determine the effective CPU
1916 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1917 setting it because the kernel can adjust it (and the previous size check
1918 would not detect this in the majority of cases).
1920 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1921 the following new symbols are used: fts64_children, fts64_close,
1922 fts64_open, fts64_read and fts64_set.
1924 * getaddrinfo now detects certain invalid responses on an internal netlink
1925 socket. If such responses are received, an affected process will
1926 terminate with an error message of "Unexpected error <number> on netlink
1927 descriptor <number>" or "Unexpected netlink response of size <number> on
1928 descriptor <number>". The most likely cause for these errors is a
1929 multi-threaded application which erroneously closes and reuses the netlink
1930 file descriptor while it is used by getaddrinfo.
1932 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1933 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1934 unnecessary serialization of memory allocation requests across threads.
1935 The defect is now corrected. Users should see a substantial increase in
1936 the concurent throughput of allocation requests for applications which
1937 trigger this bug. Affected applications typically create and
1938 destroy threads frequently. (Bug 19048 was reported and analyzed by
1941 * There is now a --disable-timezone-tools configure option for disabling the
1942 building and installing of the timezone related utilities (zic, zdump, and
1943 tzselect). This is useful for people who build the timezone data and code
1944 independent of the GNU C Library.
1946 * The obsolete header <regexp.h> has been removed. Programs that require
1947 this header must be updated to use <regex.h> instead.
1949 * The obsolete functions bdflush, create_module, get_kernel_syms,
1950 query_module and uselib are no longer available to newly linked binaries;
1951 the header <sys/kdaemon.h> has been removed. These functions and header
1952 were specific to systems using the Linux kernel and could not usefully be
1953 used with the GNU C Library on systems with version 2.6 or later of the
1956 * Optimized string, wcsmbs and memory functions for IBM z13.
1957 Implemented by Stefan Liebler.
1959 * Newly linked programs that define a variable called signgam will no longer
1960 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1961 require signgam to be set by those functions must ensure that they use the
1962 variable provided by the GNU C Library and declared in <math.h>, without
1963 defining their own copy.
1965 * The minimum GCC version that can be used to build this version of the GNU
1966 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1967 still be used to compile programs using the GNU C Library.
1969 Security related changes:
1971 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1972 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1974 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1975 the pointer guard feature. It is always enabled. Previously,
1976 LD_POINTER_GUARD could be used to disable security hardening in binaries
1977 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1980 * An integer overflow in hcreate and hcreate_r could lead to an
1981 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1983 * The catopen function no longer has unbounded stack usage. Reported by
1984 Max. (CVE-2015-8779)
1986 * The nan, nanf and nanl functions no longer have unbounded stack usage
1987 depending on the length of the string passed as an argument to the
1988 functions. Reported by Joseph Myers. (CVE-2014-9761)
1990 * A stack-based buffer overflow was found in libresolv when invoked from
1991 libnss_dns, allowing specially crafted DNS responses to seize control
1992 of execution flow in the DNS client. The buffer overflow occurs in
1993 the functions send_dg (send datagram) and send_vc (send TCP) for the
1994 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1995 family. The use of AF_UNSPEC triggers the low-level resolver code to
1996 send out two parallel queries for A and AAAA. A mismanagement of the
1997 buffers used for those queries could result in the response of a query
1998 writing beyond the alloca allocated buffer created by
1999 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
2000 the overflow. Thanks to the Google Security Team and Red Hat for
2001 reporting the security impact of this issue, and Robert Holiday of
2002 Ciena for reporting the related bug 18665. (CVE-2015-7547)
2004 The following bugs are resolved with this release:
2006 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
2007 [887] math: Math library function "logb" and "nextafter" inconsistent
2008 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
2009 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
2010 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
2011 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
2013 [4404] localedata: German translation of "Alarm clock" is misleading
2014 [6799] math: nextafter() and nexttoward() doen't set errno on
2015 overflow/underflow errors
2016 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
2018 [10432] nis: _nss_nis_setnetgrent assertion failure
2019 [11460] libc: fts has no LFS support
2020 [12926] network: getaddrinfo()/make_request() may spin forever
2021 [13065] nptl: Race condition in pthread barriers
2022 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
2023 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
2025 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
2026 [14912] libc: Rename non-installed bits/*.h headers
2027 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
2028 [15367] math: Let gcc use __builtin_isinf
2029 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
2030 [15421] math: lgamma wrongly sets signgam for ISO C
2031 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
2032 FE_INVALID with argument out of range
2033 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
2035 [15786] dynamic-link: ifunc resolver functions can smash function
2037 [15918] math: Unnecessary check for equality in hypotf()
2038 [16061] localedata: Review / update transliteration data
2039 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
2041 [16141] time: strptime %z offset restriction
2042 [16171] math: drem should be alias of remainder
2043 [16296] math: fegetround is pure?
2044 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
2045 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
2047 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
2048 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
2050 [16422] math: [powerpc] math-float, math-double failing llrint tests with
2051 "Exception "Inexact" set" on ppc32
2052 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
2053 [16517] math: Missing underflow exception from tanf/tan/tanl
2054 [16519] math: Missing underflow exception from sinhf
2055 [16520] math: Missing underflow exception from tanhf
2056 [16521] math: Missing underflow exception from exp2
2057 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
2059 [16734] stdio: fopen calls mmap to allocate its buffer
2060 [16961] math: nan function incorrect handling of bad sequences
2061 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
2062 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
2063 [16985] locale: localedef: confusing error message when opening output
2065 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
2066 [17197] locale: Redundant shift character in iconv conversion output at
2068 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
2069 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
2070 [17250] dynamic-link: static linking breaks nss loading
2071 (getaddrinfo/getpwnam/etc...)
2072 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
2074 [17441] math: isnan() should use __builtin_isnan() in GCC
2075 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
2076 (related to lock elision)
2077 [17787] manual: Exponent on page 324 of the PDF ends prematurely
2078 [17886] time: strptime should be able to parse "Z" as a timezone with %z
2079 [17887] time: strptime should be able to parse "+01:00" style timezones
2080 [17905] libc: catopen() Multiple unbounded stack allocations
2082 [18084] libc: backtrace (..., 0) dumps core on x86
2083 [18086] libc: nice() sets errno to 0 on success
2084 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
2085 is too large (CVE-2015-8778)
2086 [18251] dynamic-link: SONAME missing when audit modules provides path
2087 [18265] libc: add attributes for wchar string and memory functions
2088 [18370] math: csqrt missing underflows
2089 [18421] libc: [hppa] read-only segment has dynamic relocations
2090 [18472] libc: Obsolete syscall wrappers should be compat symbols
2091 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
2092 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
2093 [18525] localedata: Remove locale timezone information
2094 [18560] libc: [powerpc] spurious bits/ipc.h definitions
2095 [18568] localedata: Update locale data to Unicode 8.0
2096 [18589] locale: sort-test.sh fails at random
2097 [18595] math: ctan, ctanh missing underflows
2098 [18604] libc: assert macro-expands its argument
2099 [18610] math: S390: fetestexcept() reports any exception if DXC-code
2100 contains a vector instruction exception.
2101 [18611] math: j1, jn missing errno setting on underflow
2102 [18618] localedata: sync Chechen locale definitions with other *_RU
2104 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
2105 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
2106 [18665] network: In send_dg, the recvfrom function is NOT always using the
2107 buffer size of a newly created buffer (CVE-2015-7547)
2108 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
2110 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
2112 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
2113 [18699] math: tilegx cproj() for various complex infinities does not yield
2115 [18724] libc: Harden put*ent functions against data injection
2116 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
2117 [18755] build: build errors with -DNDEBUG
2118 [18757] stdio: fmemopen fails to set errno on failure
2119 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
2121 [18781] libc: openat64 lacks O_LARGEFILE
2122 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
2123 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
2124 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
2125 [18790] math: [ldbl-128ibm] tanhl inaccurate
2126 [18795] libc: stpncpy fortification misses buffer lengths that are
2127 statically too large
2128 [18796] build: build fails for --disable-mathvec
2129 [18803] math: hypot missing underflows
2130 [18820] stdio: fmemopen may leak memory on failure
2131 [18823] math: csqrt spurious underflows
2132 [18824] math: fma spurious underflows
2133 [18825] math: pow missing underflows
2134 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
2135 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
2136 [18870] build: sem_open.c fails to compile with missing symbol
2138 [18872] stdio: Fix memory leak in printf_positional
2139 [18873] libc: posix_fallocate overflow check ineffective
2140 [18875] math: Excess precision leads incorrect libm
2141 [18877] libc: arm: mmap offset regression
2142 [18887] libc: memory corruption when using getmntent on blank lines
2143 [18918] localedata: hu_HU: change time to HH:MM:SS format
2144 [18921] libc: Regression: extraneous stat() and fstat() performed by
2146 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
2147 binaries (CVE-2015-8777)
2148 [18951] math: tgamma missing underflows
2149 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
2151 [18953] localedata: lt_LT: change currency symbol to the euro
2152 [18956] math: powf inaccuracy
2153 [18961] math: [i386] exp missing underflows
2154 [18966] math: [i386] exp10 missing underflows
2155 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
2156 [18969] build: multiple string test failures due to missing locale
2158 [18970] libc: Reference of pthread_setcancelstate in libc.a
2159 [18977] math: float / long double Bessel functions not in XSI POSIX
2160 [18980] math: i386 libm functions return with excess range and precision
2161 [18981] math: i386 scalb*, ldexp return with excess range and precision
2162 [18982] stdio: va_list and vprintf
2163 [18985] time: Passing out of range data to strftime() causes a segfault
2165 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
2166 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
2167 [19012] locale: iconv_open leaks memory on error path
2168 [19016] math: clog, clog10 inaccuracy
2169 [19018] nptl: Mangle function pointers in tls_dtor_list
2170 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
2171 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
2172 [19048] malloc: malloc: arena free list can become cyclic, increasing
2174 [19049] math: [powerpc] erfc incorrect zero sign
2175 [19050] math: [powerpc] log* incorrect zero sign
2176 [19058] math: [x86_64] Link fail with -fopenmp and -flto
2177 [19059] math: nexttoward overflow incorrect in non-default rounding modes
2178 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
2179 [19074] network: Data race in _res_hconf_reorder_addrs
2180 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
2181 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
2182 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
2184 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
2186 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
2187 [19086] manual: posix_fallocate64 documented argument order is wrong.
2188 [19088] math: lround, llround missing exceptions close to overflow
2190 [19094] math: lrint, llrint missing exceptions close to overflow threshold
2191 [19095] math: dbl-64 lrint incorrect for 64-bit long
2192 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
2193 [19124] dynamic-link: ld.so failed to build with older assmebler
2194 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
2195 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
2196 [19134] math: [powerpc32] lround, lroundf spurious exceptions
2197 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
2198 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
2199 pthread_setaffinity_np
2200 [19156] math: [ldbl-128] j0l spurious underflows
2201 [19164] nptl: tst-getcpu fails with many possible CPUs
2202 [19168] math: math/test-ildoubl and math/test-ldouble failure
2203 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
2204 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
2206 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
2207 (FE_NOMASK_ENV) do not clear SSE exceptions
2208 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
2209 _int_new_arena/reused_arena
2210 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
2211 [19201] math: dbl-64 remainder incorrect sign of zero result
2212 [19205] math: bits/math-finite.h conditions do not match math.h and
2214 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
2215 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
2216 for C99-based standards
2217 [19212] libc: features.h not -Wundef clean
2218 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
2220 [19214] libc: Family and model identification for AMD CPU's are incorrect.
2221 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
2222 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
2224 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
2225 "inexact" exceptions
2226 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
2228 [19242] libc: strtol incorrect in Turkish locales
2229 [19243] malloc: reused_arena can pick an arena on the free list, leading
2230 to an assertion failure and reference count corruption
2231 [19253] time: tzset() ineffective when temporary TZ did not include DST
2233 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
2234 [19270] math: [hppa] Shared libm missing __isnanl
2235 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
2236 MAP_HUGETLB and MAP_STACK defines
2237 [19313] nptl: Wrong __cpu_mask for x32
2238 [19347] libc: grantpt: try to force a specific gid even without pt_chown
2239 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
2240 [19350] math: [ldbl-128ibm] sinhl spurious overflows
2241 [19351] math: [ldbl-128ibm] logl inaccurate near 1
2242 [19363] time: x32: times() return value wrongly truncates/sign extends
2244 [19367] dynamic-link: Improve branch prediction on Silvermont
2245 [19369] network: Default domain name not reset by res_ninit when "search"
2246 / "domain" entry is removed from resolv.conf
2247 [19375] math: powerpc: incorrect results for POWER7 logb with negative
2249 [19385] localedata: bg_BG: time separator should be colon, not comma
2250 [19408] libc: linux personality syscall wrapper may erroneously return an
2251 error on 32-bit architectures
2252 [19415] libc: dladdr returns wrong names on hppa
2253 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
2254 IBM905, IBM907, and IBM909
2255 [19439] math: Unix98 isinf and isnan functions conflict with C++11
2256 [19443] build: build failures with -DDEBUG
2257 [19451] build: Make check fails on test-double-vlen2
2258 [19462] libc: Glibc failed to build with -Os
2259 [19465] math: Wrong code with -Os
2260 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
2262 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
2264 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
2265 [19486] math: S390: Math tests fail with "Exception Inexact set".
2266 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
2267 [19550] libc: [mips] mmap negative offset handling inconsistent with other
2269 [19590] math: Fail to build shared objects that use libmvec.so functions.
2273 * The following bugs are resolved with this release:
2275 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
2276 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
2277 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
2278 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
2279 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
2280 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
2281 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
2282 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
2283 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
2284 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
2285 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
2286 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
2287 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
2288 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
2289 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
2290 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
2291 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
2292 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
2293 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
2294 18657, 18676, 18694, 18696, 18887.
2296 * Cache information can be queried via sysconf() function on s390 e.g. with
2297 _SC_LEVEL1_ICACHE_SIZE as argument.
2299 * A buffer overflow in gethostbyname_r and related functions performing DNS
2300 requests has been fixed. If the NSS functions were called with a
2301 misaligned buffer, the buffer length change due to pointer alignment was
2302 not taken into account. This could result in application crashes or,
2303 potentially arbitrary code execution, using crafted, but syntactically
2304 valid DNS responses. (CVE-2015-1781)
2306 * The time zone file parser has been made more robust against crafted time
2307 zone files, avoiding heap buffer overflows related to the processing of
2308 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
2309 large time zone data files. Overly long time zone specifiers in the TZ
2310 variable no longer result in stack overflows and crashes.
2312 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
2313 for LD and GD on x86 and x86-64, has been implemented. You will need
2314 binutils-2.24 or later to enable this optimization.
2316 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
2317 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
2318 Hat). These updates cause user visible changes, such as the fix for bug
2321 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
2322 and getXXbyYY NSS calls for the same database, causing a denial-of-service
2323 condition in some applications.
2325 * Added vector math library named libmvec with the following vectorized x86_64
2326 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
2328 The library can be disabled with --disable-mathvec. Use of the functions is
2329 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
2330 Shared library libmvec.so is linked in as needed when using -lm (no need to
2331 specify -lmvec explicitly for not static builds).
2332 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
2334 * A new fmemopen implementation has been added with the goal of POSIX
2335 compliance. The new implementation fixes the following long-standing
2336 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
2337 old implementation is still present for use be by existing binaries.
2339 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
2340 releases. It has been fixed to match 2.19 and older, but binaries built
2341 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
2343 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
2344 Contributed by Roland McGrath (Google).
2346 * The header <regexp.h> is deprecated, and will be removed in a future
2347 release. Use of this header will trigger a deprecation warning.
2348 Application developers should update their code to use <regex.h> instead.
2350 This header was formerly part of SUS, but was deprecated in 1994 and
2351 removed from the standard in 2001. Also, the glibc implementation
2352 leaks memory. See BZ#18681 for more details.
2356 * The following bugs are resolved with this release:
2358 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
2359 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
2360 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
2361 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
2362 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
2363 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
2364 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
2365 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
2366 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
2367 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
2370 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
2371 too little memory for the to-be-scanned arguments and overflow the
2372 allocated buffer. The implementation now correctly computes the required
2373 buffer size when using malloc, and switches to malloc from alloca as
2376 * A new semaphore algorithm has been implemented in generic C code for all
2377 machines. Previous custom assembly implementations of semaphore were
2378 difficult to reason about or ensure that they were safe. The new version
2379 of semaphore supports machines with 64-bit or 32-bit atomic operations.
2380 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
2381 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
2383 * Port to Altera Nios II has been contributed by Mentor Graphics.
2385 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
2386 implementations for powerpc64/powerpc64le.
2387 Implemented by Adhemerval Zanella (IBM).
2389 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
2390 and powerpc64le. This may improve lock scaling of existing programs on
2391 HTM capable systems. The lock elision code is only enabled with
2392 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
2393 powerpc will issue a transaction abort on every syscall to avoid side
2394 effects being visible outside transactions.
2396 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
2397 AArch64. Contributed by ARM Ltd.
2399 * i386 memcpy functions optimized with SSE2 unaligned load/store.
2401 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
2402 under certain input conditions resulting in the execution of a shell for
2403 command substitution when the application did not request it. The
2404 implementation now checks WRDE_NOCMD immediately before executing the
2405 shell and returns the error WRDE_CMDSUB as expected.
2407 * CVE-2012-3406 printf-style functions could run into a stack overflow when
2408 processing format strings with a large number of format specifiers.
2410 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
2411 infinite loop if the DNS response contained a PTR record of an unexpected
2414 * The minimum GCC version that can be used to build this version of the GNU
2415 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
2416 still be used to compile programs using the GNU C Library.
2418 * The GNU C Library is now built with -Werror by default. This can be
2419 disabled by configuring with --disable-werror.
2421 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
2423 * The obsolete sigvec function has been removed. This was the original
2424 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
2425 programs have been using instead for about 25 years. Of course, ABI
2426 compatibility for old binaries using sigvec remains intact.
2428 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
2429 with newer versions of bison.
2431 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
2432 The original MIPS o32 hard-float ABI requires an FPU where double-precision
2433 registers overlay two consecutive single-precision registers. MIPS32R2
2434 introduced a new FPU mode (FR=1) where double-precision registers extend the
2435 corresponding single-precision registers which is incompatible with the
2436 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
2437 require the use of FR=1 making a transition necessary. New o32 ABI
2438 extensions enable users to migrate over time from the original o32 ABI
2439 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
2440 tracks the ABI of any loaded object and verifies that new objects are
2441 compatible. Mode transitions will also be requested as required and
2442 unsupportable objects will be rejected. The ABI checks include both soft and
2443 hard float ABIs for o32, n32 and n64.
2445 GCC 5 with GNU binutils 2.25 onwards:
2446 It is strongly recommended that all o32 system libraries are built using the
2447 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
2448 with the original and all new o32 ABI extensions. Configure a MIPS GCC
2449 compiler using --with-fp-32=xx to set this by default.
2453 * The following bugs are resolved with this release:
2455 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
2456 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
2457 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
2458 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
2459 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
2460 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
2461 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
2462 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
2463 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
2464 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
2465 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
2466 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
2467 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
2468 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
2469 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
2471 * Reverted change of ABI data structures for s390 and s390x:
2472 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
2473 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
2474 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
2475 are preserved pointing straight to the same implementation as the old ones.
2476 Given that, new callers will simply provide a too-big buffer to these
2477 functions. Any applications/libraries out there that embed jmp_buf or
2478 ucontext_t in an ABI-relevant data structure that have already been rebuilt
2479 against 2.19 headers will have to rebuilt again. This is necessary in any
2480 case to revert the breakage in their ABI caused by the glibc change.
2482 * Support for file description locks is added to systems running the
2483 Linux kernel. The standard file locking interfaces are extended to
2484 operate on file descriptions, not file descriptors, via the use of
2485 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
2486 are associated with an open file instead of a process.
2488 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
2490 * The minimum Linux kernel version that this version of the GNU C Library
2491 can be used with is 2.6.32.
2493 * Running the testsuite no longer terminates as soon as a test fails.
2494 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
2495 with PASS or FAIL lines for individual tests. A summary of the results is
2496 printed, including a list of failing lists, and "make check" exits with
2497 error status if there were any unexpected failures. "make check
2498 stop-on-test-failure=y" may be used to keep the old behavior.
2500 * The am33 port, which had not worked for several years, has been removed
2503 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
2504 supported; they now act the same as _DEFAULT_SOURCE (but generate a
2505 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
2506 conflicted with POSIX (support for which was removed in 2.19), the
2507 interfaces those macros enabled remain available when compiling with
2508 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
2509 test macros defined.
2511 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
2513 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
2514 This may improve lock scaling of existing programs on TX capable systems.
2515 The lock elision code is only built with --enable-lock-elision=yes and
2516 then requires a GCC version supporting the TX builtins. With lock elision
2517 default mutexes are elided via __builtin_tbegin, if the cpu supports
2518 transactions. By default lock elision is not enabled and the elision code
2521 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
2522 copy the path argument. This allowed programs to cause posix_spawn to
2523 deference a dangling pointer, or use an unexpected pathname argument if
2524 the string was modified after the posix_spawn_file_actions_addopen
2527 * All supported architectures now use the main glibc sysdeps directory
2528 instead of some being in a separate "ports" directory (which was
2529 distributed separately before glibc 2.17).
2531 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
2532 On configurations that support it (all Linux configurations), it's now
2533 used regardless of the --enable-add-ons switch to configure. It is no
2534 longer possible to build such configurations without pthreads support.
2536 * Locale names, including those obtained from environment variables (LANG
2537 and the LC_* variables), are more tightly checked for proper syntax.
2538 setlocale will now fail (with EINVAL) for locale names that are overly
2539 long, contain slashes without starting with a slash, or contain ".." path
2540 components. (CVE-2014-0475) Previously, some valid locale names were
2541 silently replaced with the "C" locale when running in AT_SECURE mode
2542 (e.g., in a SUID program). This is no longer necessary because of the
2545 * On x86-64, the dynamic linker's lazy-binding support is now compatible
2546 with application code using Intel MPX instructions. (With all previous
2547 versions, the MPX register state could be clobbered when making calls
2548 into or out of a shared library.) Note that while the new dynamic
2549 linker is compatible with all known x86 hardware whether or not it
2550 supports Intel MPX, some x86 instruction-set emulators might fail to
2551 handle the new instruction encodings. This is known to affect Valgrind
2552 versions up through 3.9 (but will be fixed in the forthcoming 3.10
2553 release), and might affect other tools that do instruction emulation.
2555 * Support for loadable gconv transliteration modules has been removed.
2556 The support for transliteration modules has been non-functional for
2557 over a decade, and the removal is prompted by security defects. The
2558 normal gconv conversion modules are still supported. Transliteration
2559 with //TRANSLIT is still possible, and the //IGNORE specifier
2560 continues to be supported. (CVE-2014-5119)
2562 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
2563 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
2564 resulting a denial-of-service security vulnerability in applications which
2565 use functions related to iconv. (CVE-2014-6040)
2569 * The following bugs are resolved with this release:
2571 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
2572 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
2573 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
2574 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
2575 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
2576 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
2577 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
2578 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
2579 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
2580 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
2581 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
2582 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
2583 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
2584 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
2585 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
2586 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
2587 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
2588 16431, 16453, 16474, 16506, 16510, 16529
2590 * Slovenian translations for glibc messages have been contributed by the
2591 Translation Project's Slovenian team of translators.
2593 * The public headers no longer use __unused nor __block. This change is to
2594 support compiling programs that are derived from BSD sources and use
2595 __unused internally, and to support compiling with Clang's -fblock
2596 extension which uses __block.
2598 * CVE-2012-4412 The strcoll implementation caches indices and rules for
2599 large collation sequences to optimize multiple passes. This cache
2600 computation may overflow for large collation sequences and may cause a
2601 stack or buffer overflow. This is now fixed to use a slower algorithm
2602 which does not use a cache if there is an integer overflow.
2604 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
2605 rules for large collation sequences to optimize multiple passes and falls
2606 back to alloca if malloc fails, resulting in a possible stack overflow.
2607 The implementation now falls back to an uncached collation sequence lookup
2610 * CVE-2013-4788 The pointer guard used for pointer mangling was not
2611 initialized for static applications resulting in the security feature
2612 being disabled. The pointer guard is now correctly initialized to a
2613 random value for static applications. Existing static applications need
2614 to be recompiled to take advantage of the fix (bug 15754).
2616 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
2617 to the d_name member of struct dirent, or omit the terminating NUL
2618 character. (Bugzilla #14699).
2620 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
2621 aligned_alloc functions could allocate too few bytes or corrupt the
2622 heap when passed very large allocation size values (Bugzilla #15855,
2625 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
2626 for AF_INET6 has been fixed (Bugzilla #16072).
2628 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
2629 pap_CW, quz_PE, the_NP.
2631 * Substantially revised locales: gd_GB, ht_HT
2633 * The LC_ADDRESS field was updated to support country_car for almost all
2636 * ISO 1427 definitions were updated.
2638 * ISO 3166 definitions were updated.
2640 * The localedef utility now supports --big-endian and --little-endian
2641 command-line options to generate locales for a different system from that
2642 for which the C library was built.
2644 * Binary locale files now only depend on the endianness of the system for
2645 which they are generated and not on other properties of that system. As a
2646 consequence, binary files generated with new localedef may be incompatible
2647 with old versions of the GNU C Library, and binary files generated with
2648 old localedef may be incompatible with this version of the GNU C Library,
2649 in the following circumstances:
2651 + Locale files may be incompatible on m68k systems.
2653 + Locale archive files (but not separate files for individual locales) may
2654 be incompatible on systems where plain "char" is signed.
2656 * The configure option --disable-versioning has been removed. Builds with
2657 --disable-versioning had not worked for several years.
2659 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
2660 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
2662 * SystemTap probes for malloc have been introduced.
2664 * SystemTap probes for slow multiple precision fallback paths of
2665 transcendental functions have been introduced.
2667 * Support for powerpc64le has been added.
2669 * The soft-float powerpc port now supports e500 processors.
2671 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
2673 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
2674 set of header declarations that are enabled by default, even when other
2675 feature test macros or compiler options such as -std=c99 would otherwise
2676 disable some of those declarations.
2678 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
2679 conflict with POSIX. The libbsd-compat library (which was a dummy library
2680 that did nothing) has also been removed.
2682 * Preliminary documentation about Multi-Thread, Async-Signal and
2683 Async-Cancel Safety has been added.
2685 * Change of ABI data structures for s390 and s390x:
2686 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
2687 allow for future hardware extensions. All library functions that accept or
2688 return these structures were versioned in order to provide backwards
2689 compatibility with existing code. However, not all cases can be handled
2690 with interface versioning. If an application embeds either structure into
2691 another structure and that structure is passed to another compilation unit
2692 which expects the newer larger-sized object then any access to the new
2693 fields will result in undefined behaviour. Similarly any access to fields
2694 that were moved by the enlarging of the structures will cause undefined
2695 behaviour. To fix the undefined behaviour all objects that are part of the
2696 final in-memory image must agree on the size of structures, and this may
2697 require recompilation.
2701 * The following bugs are resolved with this release:
2703 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
2704 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
2705 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
2706 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
2707 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
2708 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
2709 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
2710 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
2711 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
2712 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
2713 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
2714 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
2715 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
2718 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
2719 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
2720 Distributions can re-enable building and using pt_chown via the new configure
2721 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
2722 considerable security risks and should only be used if the distribution
2723 understands and accepts the risks.
2725 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
2728 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
2729 fixed (Bugzilla #15330).
2731 * Add support for calling C++11 thread_local object destructors on thread
2732 and program exit. This needs compiler support for offloading C++11
2733 destructor calls to glibc.
2735 * Improved worst case performance of libm functions with double inputs and
2738 * Support for priority inherited mutexes in pthread condition variables on
2739 non-x86 architectures.
2741 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
2743 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
2745 * Optimized string functions for ARM. Implemented by Will Newton and
2748 * Optimized libm functions for SPARC. Implemented by David S. Miller.
2750 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
2753 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
2754 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
2756 * Added a benchmark framework to track performance of functions in glibc.
2758 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
2759 It is based on draft TS 18661 and currently enabled as a GNU extension.
2761 * On Linux, the clock function now uses the clock_gettime system call
2762 for improved precision, rather than old times system call.
2764 * Added support for version-3 tz format files. This is needed when using
2765 the tz database release 2013e or later, and affects a few unusual cases --
2766 currently only TZ='America/Godthab' for time stamps after 2037.
2768 * Added new API functions pthread_getattr_default_np and
2769 pthread_setattr_default_np to get and set the default pthread
2770 attributes of a process.
2772 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
2773 This may improve lock scaling of existing programs on TSX capable systems.
2774 When the --enable-lock-elision=yes parameter is specified at configure
2775 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2778 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2779 availability). Implemented by Ryan S. Arnold.
2781 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2785 * The following bugs are resolved with this release:
2787 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2788 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2789 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2790 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2791 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2792 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2793 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2794 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2795 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2796 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2797 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2798 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2799 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2800 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2801 14879, 14889, 14893, 14898, 14914.
2803 * Optimization of memcpy for MIPS.
2805 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2806 EMFILE has been fixed (Bugzilla #14889).
2808 * The add-on ports collection is now distributed in the "ports" subdirectory
2809 of the main GNU C Library distribution, rather than separately.
2811 * Port to ARM AArch64 contributed by Linaro.
2813 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2814 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2816 Implemented by Andreas Krebbel.
2818 * The new function secure_getenv allows secure access to the environment,
2819 returning NULL if running in a SUID/SGID process. This function replaces
2820 the internal function __secure_getenv.
2822 * SystemTap static probes have been added into the dynamic linker.
2823 Implemented by Gary Benson.
2825 * Optimizations of string functions strstr, strcasestr and memmem.
2826 Implemented by Maxim Kuvyrkov.
2828 * The minimum Linux kernel version that this version of the GNU C Library
2829 can be used with is 2.6.16.
2831 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2832 powerpc POWER7. Implemented by Will Schmidt.
2834 * New configure option --disable-nscd builds the C library such that it
2835 never attempts to contact the Name Service Caching Daemon (nscd).
2836 New configure option --disable-build-nscd avoids building nscd itself;
2837 this is the default if --disable-nscd is used.
2839 * Improved support for cross-compilation, including cross-testing and
2840 bootstrap builds without a previously built glibc.
2842 * Several testsuite tests are now able to test multiple IFUNC variants of an
2843 interface, rather than just testing the one that would be chooen by
2846 * New configure options --with-bugurl and --with-pkgversion, for
2847 distributors to use to embed their bug-reporting and package version
2848 information in --help and --version output.
2850 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2851 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2852 allows creation of chroots without the procfs mounted on /proc.
2854 * The `crypt' function now fails if passed salt bytes that violate the
2855 specification for those values. On Linux, the `crypt' function will
2856 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2857 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2858 when the mode is enabled.
2860 * The `clock_*' suite of functions (declared in <time.h>) is now available
2861 directly in the main C library. Previously it was necessary to link with
2862 -lrt to use these functions. This change has the effect that a
2863 single-threaded program that uses a function such as `clock_gettime' (and
2864 is not linked with -lrt) will no longer implicitly load the pthreads
2865 library at runtime and so will not suffer the overheads associated with
2866 multi-thread support in other code such as the C++ runtime library.
2868 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2873 * The following bugs are resolved with this release:
2875 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2876 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2877 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2878 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2879 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2880 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2881 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2882 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2883 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2884 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2885 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2886 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2887 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2888 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2889 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2890 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2891 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2892 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2893 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2894 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2895 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2896 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2899 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2900 configuring glibc with:
2901 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2902 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2903 Implemented by H.J. Lu.
2907 + define static_assert
2909 + do not declare gets
2911 + declare at_quick_exit and quick_exit also for ISO C11
2913 + aligned_alloc. NB: The code is deliberately allows the size parameter
2914 to not be a multiple of the alignment. This is a moronic requirement
2915 in the standard but it is only a requirement on the caller, not the
2918 + timespec_get added
2920 + uchar.h support added
2922 + CMPLX, CMPLXF, CMPLXL added
2924 Implemented by Ulrich Drepper.
2926 * Support for the IA-64 has been moved to ports.
2928 * Remove support for anything but ELF binary format
2930 * Checking versions of poll, ppoll added.
2931 Implemented by Ulrich Drepper.
2933 * More generic and 64-bit performance optimizations to math functions.
2934 Implemented by Ulrich Drepper.
2936 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2937 headers and functions available at compile time as they were before
2938 version 2.14. This option will be removed at some time in the future
2939 after the TI-RPC library becomes fully sufficient for the needs of
2940 existing applications.
2942 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2943 Note that glibc is not expected to work with any Linux kernel version
2946 * New header <sys/auxv.h> and function getauxval allowing easy access to
2947 the AT_* key-value pairs passed from the Linux kernel. The header also
2948 defines the HWCAP_* bits associated with the AT_HWCAP key.
2950 * New locales: mag_IN
2952 * New configure option --enable-systemtap builds SystemTap static probes
2953 into libc for setjmp and longjmp and into libpthread for various operations.
2954 So far the setjmp/longjmp probes and some of the libpthread probes are
2955 provided only for i*86 and x86_64.
2956 Implemented by Roland McGrath and Rayson Ho.
2958 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2960 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2963 * More optimized functions for SPARC. Implemented by David S. Miller.
2965 * Improved support for cross-compilation, especially bootstrap builds
2966 without a previously built glibc.
2968 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2969 Chris Metcalf from Tilera.
2971 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2972 now supported for ARM processors.
2974 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2975 as the name of the dynamic linker, to distinguish it from the
2976 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2978 * Support for CRIS has been removed from ports.
2980 * A new class of installed header has been documented for low-level
2981 platform-specific functionality. PowerPC added the first instance with a
2982 function to provide time base register access. Contributed by Tulio
2983 Magno Quites Machado Filho.
2985 * ix86 configurations now install header files that are consistent with
2986 what x86-64 configurations install. These same header files can be used
2987 for -m32, -m64, or -mx32 builds.
2988 Contributed by H.J. Lu.
2990 * Math library bug fixes. A thorough audit of all open math library bugs was
2991 conducted by Joseph Myers. Significant progress was made on many math
2992 library bugs resulting in more accurate exceptions and function results.
2993 Many thanks to all those that contributed including Andreas Jaeger for his
2994 patch review and work on the x87 trigonometric instruction issues.
2996 * Timezone data is no longer installed. Timezone-related binaries and scripts
2997 will continue to be installed. Users should obtain their timezone data from
2998 their distribution provider or from the tzdata package at
2999 <ftp://munnari.oz.au/pub/>.
3003 * The following bugs are resolved with this release:
3005 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
3006 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
3007 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
3008 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
3009 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
3010 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
3011 13484, 13506, 13515, 13523, 13524, 13538, 13540
3013 * New program pldd to list loaded object of a process
3014 Implemented by Ulrich Drepper.
3016 * Add nss_db support back to glibc. No more dependency on Berkeley db
3017 and support for initgroups lookups.
3018 Implemented by Ulrich Drepper.
3020 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
3021 Contributed by HJ Lu.
3023 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
3024 Contributed by HJ Lu.
3026 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
3027 on x86-32 and x86-64.
3028 Contributed by Liubov Dmitrieva.
3030 * Optimized strchr and strrchr for SSE on x86-32.
3031 Contributed by Liubov Dmitrieva.
3033 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
3034 for x86-64 and x86-32.
3035 Contributed by Liubov Dmitrieva.
3037 * New interfaces: scandirat, scandirat64
3038 Implemented by Ulrich Drepper.
3040 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
3041 Implemented by Ulrich Drepper.
3043 * nscd now also caches the netgroup database.
3044 Implemented by Ulrich Drepper.
3046 * Integrate libm with gcc's -ffinite-math-only option.
3047 Implemented by Ulrich Drepper.
3049 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
3050 to math functions. Implemented by Ulrich Drepper.
3052 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
3053 Implemented by Ulrich Drepper.
3055 * New Linux interfaces: process_vm_readv, process_vm_writev
3057 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
3058 Implemented by Ulrich Drepper.
3060 * Optimized nearbyint and strcasecmp for PPC.
3061 Implemented by Adhemerval Zanella.
3063 * New locales: bho_IN, unm_US, es_CU, ta_LK
3067 * The following bugs are resolved with this release:
3069 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
3070 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
3071 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
3072 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
3073 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
3074 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
3075 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
3076 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
3077 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
3078 12795, 12811, 12813, 12814, 12841
3080 * The RPC implementation in libc is obsoleted. Old programs keep working
3081 but new programs cannot be linked with the routines in libc anymore.
3082 Programs in need of RPC functionality must be linked against TI-RPC.
3083 The TI-RPC implementation is IPv6 enabled and there are other benefits.
3085 Visible changes of this change include (obviously) the inability to link
3086 programs using RPC functions without referencing the TI-RPC library and the
3087 removal of the RPC headers from the glibc headers.
3088 Implemented by Ulrich Drepper.
3090 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
3091 syncfs, setns, sendmmsg
3093 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
3094 yue_HK, lij_IT, mhr_RU
3096 * New encodings: CP770, CP771, CP772, CP773, CP774
3098 * New program sotruss to trace calls through PLTs
3099 Implemented by Ulrich Drepper.
3101 * The malloc hook implementation is marked deprecated and will be removed
3102 from the default implementation in the next version. The design never
3103 worked ever since the introduction of threads. Even programs which do
3104 not create threads themselves can use multiple threads created internally.
3108 * The following bugs are resolved with this release:
3110 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
3111 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
3112 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
3113 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
3116 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
3118 * POWER7 optimizations: memset, memcmp, strncmp
3120 * New optimized string functions for x86-64: strnlen (SSE2),
3121 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
3122 Implemented by Ulrich Drepper.
3126 * The following bugs are resolved with this release:
3128 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
3129 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
3130 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
3131 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
3132 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
3133 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
3134 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
3135 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
3137 * New interfaces: pthread_getname_np, pthread_setname_np
3139 * New Linux interface: recvmmsg
3141 * STT_GNU_IFUNC implemented for Sparc by David Miller.
3143 * The dynamic linker now recognizes supported ABI versions from the
3144 EI_ABIVERSION field in the ELF header.
3145 Implemented by Ulrich Drepper.
3147 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
3148 will not be used to fill in password fields in the passwd.byname replies.
3149 Instead it is used to synthesize the shadow.byname table, should it be
3150 missing. This is a useful mode in some installations involving Solaris.
3151 Implemented by Ulrich Drepper.
3153 * New locales: kok_IN, sq_MK, cv_RU
3157 * The following bugs are resolved with this release:
3159 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
3160 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
3161 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
3162 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
3163 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
3164 10789, 10817, 10823, 10840, 10847
3166 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
3168 Implemented by Ulrich Drepper.
3170 * Checking version of longjmp added that fails if an uninitialized stack
3171 frame would be created. Implemented by Ulrich Drepper.
3173 * STT_GNU_IFUNC is now supported in static executables.
3174 Implemented by H.J. Lu.
3176 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
3178 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
3179 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
3180 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
3181 Contributed by H.J. Lu.
3183 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
3184 Implemented by Ulrich Drepper.
3186 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
3188 Contributed by H.J. Lu.
3190 * Support for fma instruction in AVX on x86-64.
3191 Implemented by H.J. Lu and Ulrich Drepper.
3193 * AVX support in x86-64 auditing support in ld.so.
3194 Implemented by H.J. Lu.
3196 * STB_GNU_UNIQUE support added.
3197 Implemented by Ulrich Drepper.
3199 * Implement second fallback mode for optimized DNS lookup for even more
3200 broken environments. If two requests from the same port are not
3201 handled correctly close the socket and open a new one before sending
3202 the second request. The 'single-request-reopen' option in /etc/resolv.conf
3203 can be used to select this mode right away, instead of rediscovering the
3204 necessity is every process again.
3205 Implemented by Ulrich Drepper.
3207 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
3208 Implemented by Adam Tkac.
3210 * Optimized iconv conversions for S390x.
3211 Implemented by Andreas Krebbel.
3213 * Using condvars with PI mutexes is now more efficient due to kernel
3214 support for requeueing to PI futexes. NPTL support added for x86-64.
3215 Implemented by Ulrich Drepper.
3217 * New locales: ps_AF, my_MM
3221 * The following bugs are resolved with this release:
3223 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
3224 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
3225 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
3226 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
3227 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
3229 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
3230 Implemented by Ulrich Drepper.
3232 * New Linux interfaces: accept4, fallocate, fallocate64.
3233 Implemented by Ulrich Drepper.
3235 * Correct declarations of string function when used in C++ code. This
3236 could lead to compile errors for invalid C++ code.
3238 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
3241 * New POSIX 2008 interface: psiginfo
3242 Implemented by Ulrich Drepper.
3244 * New ISO C++1x interfaces: quick_exit, at_quick_exit
3245 Implemented by Ulrich Drepper.
3247 * Support for selecting between multiple function definitions at runtime
3248 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
3250 * The libcrypt library can now use the hash function implementations in
3251 NSS. Implemented by Ulrich Drepper.
3253 * The malloc implementation can be compiled to be less memory efficient
3254 but higher performing in multi-threaded programs.
3255 Implemented by Ulrich Drepper.
3257 * New locales: nan_TW@latin, ks_IN
3259 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
3260 Implemented by Ulrich Drepper.
3262 * Extended printf hook support. It is possible to use user-defined types
3263 and extend existing format specifiers.
3264 Implemented by Ulrich Drepper.
3266 * Handling for group shadow files has been added.
3267 Implemented by Ulrich Drepper.
3269 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
3270 servers (the case, e.g., for some people using the built-in DNS
3271 server in ADSL modems/routers). There is a once-per-process timeout
3272 in case of a broken server. To avoid it, users can run nscd or put
3273 'options single-request' in /etc/resolv.conf.
3274 Implemented by Ulrich Drepper.
3278 * The following bugs are resolved with this release:
3280 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
3281 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
3282 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
3283 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
3284 6968, 6974, 6980, 6995, 7008, 7009, 7029
3286 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
3287 up at the same time. Implemented by Ulrich Drepper.
3289 * TLS descriptors for LD and GD on x86 and x86-64.
3290 Implemented by Alexandre Oliva.
3292 * getaddrinfo now handles DCCP and UDPlite.
3293 Implemented by Ulrich Drepper.
3295 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
3296 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
3297 Implemented by Ulrich Drepper.
3299 * New implementation of memmem, strstr, and strcasestr which is O(n).
3300 Implemented by Eric Blake.
3302 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
3304 * Implement "e" option for popen to open file descriptor with the
3305 close-on-exec flag set. Implemented by Ulrich Drepper.
3307 * Implement "b" mode for fmemopen. In this mode writes writes don't
3308 implicitly add a NUL byte and seeks from the end of the buffer really
3309 use the buffer end, not the string length as the basis.
3310 Implemented by Ulrich Drepper.
3312 * Many functions, exported and internal, now atomically set the close-on-exec
3313 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
3315 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
3317 Implemented by Pravin Satpute.
3319 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
3323 * The following bugs are resolved with this release:
3325 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
3326 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
3327 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
3328 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
3329 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
3330 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
3331 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
3333 * New locales: bo_CN, bo_IN, shs_CA.
3335 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
3337 * Sorting rules for some Indian languages (Devanagari and Gujarati).
3338 Implemented by Pravin Satpute.
3340 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
3342 * nscd caches now all timeouts for DNS entries
3343 Implemented by Ulrich Drepper.
3345 * nscd is more efficient and wakes up less often.
3346 Implemented by Ulrich Drepper.
3348 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
3349 vdprintf, and obstack_vprintf.
3350 Implemented by Jakub Jelinek.
3352 * Faster memset for x86-64.
3353 Implemented by Harsha Jagasia and H.J. Lu.
3355 * Faster memcpy on x86.
3356 Implemented by Ulrich Drepper.
3358 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
3359 Implemented by Ulrich Drepper.
3361 * Faster sqrt and sqrtf implemention for some PPC variants.
3362 Implemented by Steven Munroe.
3366 * The following bugs are resolved with this release:
3368 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
3369 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
3370 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
3371 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
3372 5071, 5103, 5104, 5112, 5113, 5184, 5186
3374 * More checking functions: fread, fread_unlocked, open*, mq_open.
3375 Implemented by Jakub Jelinek and Ulrich Drepper.
3377 * Extend fortification to C++. Implemented by Jakub Jelinek.
3379 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
3380 by not recognizing 'a' as a modifier when those specs are requested.
3381 Implemented by Jakub Jelinek.
3383 * PPC optimizations to math and string functions.
3384 Implemented by Steven Munroe.
3386 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
3387 options to be passed. Implemented by Ulrich Drepper.
3389 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
3391 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
3392 Implemented by Ulrich Drepper.
3394 * Handle private futexes in the NPTL implementation.
3395 Implemented by Jakub Jelinek and Ulrich Drepper.
3397 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
3398 Implemented by Roland McGrath and Ulrich Drepper.
3400 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
3402 * SHA-256 and SHA-512 based password encryption.
3403 Implemented by Ulrich Drepper.
3405 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
3406 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
3409 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
3410 Implemented by Ulrich Drepper.
3414 * The following bugs are resolved with this release:
3416 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
3417 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
3418 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
3419 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
3420 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
3421 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
3422 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
3425 * New Linux interfaces: epoll_pwait, sched_getcpu.
3427 * New generic interfaces: strerror_l.
3429 * nscd can now cache the services database. Implemented by Ulrich Drepper.
3433 * The following bugs are resolved with this release:
3435 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
3436 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
3437 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
3438 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
3439 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
3440 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
3441 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
3442 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
3443 3225, 3251, 3252, 3253, 3273
3445 * For Linux, the sorting of addresses returned by getaddrinfo now also
3446 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
3447 Implemented by Ulrich Drepper.
3449 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
3450 Implemented by Ulrich Drepper.
3452 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
3454 * New iconv module for MIK. Contributed by Alexander Shopov.
3456 * For sites with broken group and/or passwd database, the auto-propagate
3457 option of nscd can prevent creating ID lookup entries from the results
3458 of a name lookup and vice versa. This usually is no problem but some
3459 site might have problems with the default behavior.
3460 Implemented by Ulrich Drepper.
3462 * Iterating over entire database in NIS can be slow. With the
3463 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
3464 to trade time for memory. The entire database will be read at once.
3465 Implemented by Ulrich Drepper.
3467 * The interfaces introduced in RFC 3542 have been implemented by
3470 * Support for the new ELF hash table format was added by Ulrich Drepper.
3472 * Support for priority inheritance mutexes added by Jakub Jelinek and
3475 * Support for priority protected mutexes added by Jakub Jelinek.
3477 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
3478 or_IN, csb_PL, fy_NL, sr_ME.
3482 * More overflow detection functions.
3484 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
3485 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
3487 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
3488 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
3489 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
3490 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
3491 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
3492 by Masahide Washizawa.
3494 * It is now possible to install audit libraries for the dynamic linker using
3495 LD_AUDIT. Implemented by Ulrich Drepper.
3497 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
3498 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
3499 For a libc and libpthread that works well on Linux 2.4 kernels, we
3500 recommend using the stable 2.3 branch.
3502 * The new function open_wmemstream acts like open_memstream,
3503 but uses a wchar_t wide character buffer.
3505 * The new function ppoll is an improved version of poll, similar to pselect.
3507 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
3508 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
3509 renameat, unlinkat, linkat, symlinkat, readlinkat.
3511 * New Linux kernel system calls: unshare,
3512 inotify_init, inotify_add_watch, inotify_rm_watch.
3514 * The euidaccess function is now also known by the alias eaccess,
3515 for compatibility with some other systems.
3517 * Timezone data updated to 2006b version.
3521 * The following bugs are resolved with this release:
3523 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
3524 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
3525 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
3526 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
3527 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
3528 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
3530 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3532 * As of this release, GCC 4 can be used to compile the C Library.
3534 * Timezone data updated to 2005m version.
3538 * The following bugs are resolved with this release:
3540 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
3541 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
3542 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
3543 777, 787, 821, 822, 823, 825
3545 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
3549 * Support for RFC 3678. Real implementations exist only for Linux so far.
3550 Implemented by Ulrich Drepper.
3552 * nscd can now cache entries persistently. Expiring entries are reloaded.
3553 For speedups the cache can be shared in memory with client processes.
3554 Implemented by Ulrich Drepper.
3556 * nscd can now perform SELinux checks.
3557 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
3559 * getaddrinfo queries are now cached. Canonical name lookup is performed
3561 Implemented by Ulrich Drepper.
3563 * The nothrow function attribute is used when headers are used by gcc when
3564 compiling C code. This can avoid significant amounts of exception
3567 * The malloc functions perform more error checking and are stricter when
3568 it comes to reacting on errors. The default action is to terminate
3569 the process after showing an error message. Implemented by Ulrich Drepper.
3571 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
3572 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
3574 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
3575 namespaces using the new function dlmopen(). This feature is of course,
3576 like most other dynamic loading functionality, not available in statically
3577 linked applications. Implemented by Ulrich Drepper.
3579 * Low-overhead boundary checking variants of string and some stdio functions
3580 were added. These are to be used in conjunction with a gcc patch by
3581 Jakub Jelinek which adds calls to these functions if possible.
3582 Implemented by Jakub Jelinek and Ulrich Drepper.
3584 * Old code for several operating systems and machine architectures that
3585 have not been in working condition in a long time have been removed from
3586 the main source tree maintained by the GNU C Library's maintainers.
3587 These files are now reside in the separate `ports' source module
3588 that is usable as an add-on when building the library.
3592 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
3593 interrogate the dynamic linker, compatible with the Solaris interface.
3595 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
3596 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
3598 * getifaddrs now uses the netlink interface on Linux to get its information.
3599 Implemented by Thorsten Kukuk.
3601 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
3602 Implemented by Ulrich Drepper.
3604 * support for non-executable stacks on x86 has been added. Changes mostly
3607 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
3610 * getaddrinfo now performs destination address selection according to
3615 * Thread-safe interfaces for many functions that access locale data
3616 were added in version 2.3, but these features were omitted from NEWS.
3617 Many functions have variants with an `_l' suffix that take a `locale_t'
3618 object as a parameter rather than consulting the current locale.
3619 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
3620 create and maintain `locale_t' objects. Additionally, the new function
3621 `uselocale' sets "the current locale" (as used by functions not so
3622 parameterized) set for an individual thread. These features were added
3623 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
3625 * The functions getresuid, getresgid, setresuid, and setresgid, which
3626 have long been available on Linux, are now declared in <unistd.h>
3627 and are now also available on the Hurd.
3629 * ELF thread-local storage support (TLS) now works on x86-64.
3631 * The new dynamic string token $LIB is expanded in shared library names.
3632 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
3634 * Aldy Hernandez contributed complete software floating point support for
3635 PowerPC machines with no FPU.
3637 * fexecve is implemented on Linux.
3639 * The `btowc' function should work at least twice as fast due to
3640 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
3642 * With approriate thread add-ons cancelable functions are now implemented
3643 in libc.so as well. No need to call the function in libpthread. This
3644 change allowed to finally disable the incorrect and expensive handling
3645 of weak definition in ld.so.
3647 * Yet more PLT entries in libc.so have been removed. We finally arrived
3648 at the bare minimum. Startup times improved appropriately.
3650 * Support for the new Linux/x86 system call interface was added. The
3651 AT_SYSINFO auxiliary vector entry is recognized and handled.
3655 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
3658 * iconv (the program and the interface) now accepts empty names (excluding
3659 options like //TRANSLIT) to mean "use charset of current locale".
3661 * localedef can now transliterate characters in strings which are not in
3662 the provided charmap. The information from the input locale is used.
3664 * Prelinking support was added for ELF targets. This requires additional
3665 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
3667 * Read-only stdio streams now use mmap to speed up operation by eliminating
3668 copying and buffer underflows. To use add 'm' to the mode string of
3669 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
3671 * The malloc functions were completely rewritten by Wolfram Gloger based
3672 on Doug Lea's malloc-2.7.0.c.
3674 * Isamu Hasegawa contributed a completely new and POSIX-conformant
3675 implementation of regex.
3677 * Bruno Haible upgraded the iconv and locale implementation to support
3680 * Contents of the LC_* and LANG environment variables in the CEN style are
3681 not recognized anymore. It never was used. Change by Ulrich Drepper.
3683 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
3684 thread-local storage (TLS) ABI on some platforms.
3685 Changes by Ulrich Drepper. SH support by Kaz Kojima.
3687 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
3688 EUC-JISX0213, and TSCII.
3690 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
3691 BSD-compatible interface for getting all network interface addresses.
3692 Implementation for IPv4 by Roland McGrath.
3694 * Loading of locale data is faster due to the introduction of a locale
3695 archive. Implemented by Roland McGrath and Ulrich Drepper.
3697 * Startup times are significantly reduced by not using exported functions
3698 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
3701 * Steven Munroe contributed a port to PowerPC64/Linux.
3705 * The Hurd now uses the GNU libio implementation of stdio rather than the
3706 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
3708 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
3709 with the same behavior as the Linux system call of the same name.
3713 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
3714 128-bit long double format.
3716 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
3717 IBM1161, and IBM1162 charsets.
3719 * Andreas Jaeger contributed a port to x86-64/Linux.
3721 * Peter Bruin contributed a port to PowerPC/Hurd.
3723 * libc functions using I/O streams now can handle wide-oriented streams
3726 * optimizations in the dynamic linker. Binaries created by recent binutils
3727 versions start up quicker due to reduced time spent on relocations.
3729 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
3733 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
3734 asinh, atanh, j0 for the 128-bit long double format.
3736 * Bruno Haible updated all the code handling Unicode in some form to
3737 support Unicode 3.1.
3739 * Speed of regex for single-byte locales is back to previous levels.
3740 Patch by Isamu Hasegawa.
3742 * Alpha, SPARC, and IA-64 now also using floating stacks.
3744 * Startup time of internationalized applications greatly improved through
3745 iconv cache. Use iconvconfig to generate the cache file.
3746 Contributed by Ulrich Drepper.
3748 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
3749 severe performance problems. Patch by David Mosberger.
3751 * The Hurd port got a lot more functionality like AIO, various stdio
3752 extensions, etc. Mainly done by Roland McGrath.
3754 * mtrace can now lookup symbols in shared libraries.
3758 * Intel's IA-64 math library is largely integrated. It provides fast and
3759 accurate implementatations for most basic and standard math functions
3760 in float, double, and long double format.
3762 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
3763 and asin for the 96-bit long double format and asin, log, tan for the
3764 128-bit long double format.
3766 * The beginning of a last-bit accurate math library by IBM Haifa were added.
3767 The basic double functions exist today. Contributed by Abraham Ziv
3768 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
3769 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
3771 * An asynchronous name lookup library was added. The interface is designed
3772 after POSIX AIO. The proposal was circulated beforehand to get comments.
3773 No negative ones came in. Implemented by Ulrich Drepper.
3775 * Port to S390/64bit contributed by Martin Schwidefsky
3776 <schwidefsky@de.ibm.com>.
3778 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3779 of functions for Linux/IA-64.
3781 * The RPC code is now thread safe. Threads can now use the same service
3782 of different services at the same time. Patch by Eric Norum
3783 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3785 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3786 family of functions for Linux/S390.
3788 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3789 of functions for Linux/x86.
3791 * Port to Linux/CRIS contributed by Axis Communications.
3795 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3796 we can now check for namespace violations and missing declarations. The
3797 result is that almost all headers are now Unix-compliant (as defined in
3798 the upcoming XPG6). The negative side is that some programs might need
3799 corrections, too, if they depend on the incorrect form of the headers in
3800 previous versions which defined too many symbols and included too many
3803 * regex now handles multibyte character sets correctly.
3804 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3806 * iconv (the program) does now conform to the upcoming XPG6 and handles
3807 charmaps. Instead of the charset names the path of charmaps can be
3808 provided and the conversion happens based on this data.
3809 Contributed by Ulrich Drepper.
3811 * The locale program now provides detailed information about the installed
3816 only lists the names of the supported locales
3820 provides details such as country, language, and codeset name.
3821 Contributed by Ulrich Drepper.
3825 * The gencat program now parses the input file according to the charset
3826 selected by the LC_CTYPE category. This is important for stateful
3827 character sets. To make generating catalogs easier there is a way
3828 to overwrite the charset selected by the locale: before the first
3829 message or $ quote line the catalog can contain a line like
3831 $ codeset=ISO-8859-2
3833 to select the charset (ISO-8859-2 in this case).
3835 Implemented by Shinya Hanataka and Ulrich Drepper.
3837 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3838 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3839 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3841 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3842 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3844 * The LANGUAGE environment variable is now ignored unless the locale is
3845 changed from the default "C" locale.
3847 * The usual bug fixes.
3851 * Greg McGary added runtime support for bounds checking using gcc's
3852 new -fbounded-pointers option. ix86 target is complete. PowerPC
3855 * Thorsten Kukuk added secure mode support to nscd.
3857 * The Berkeley db libraries have been removed.
3859 Related, the nss_db module is now in a separate package since it
3860 obviously requires a database library being available.
3862 * Wide character I/O streams implemented by Ulrich Drepper.
3864 * Functions from the extended socket API added by Ulrich Drepper.
3866 * Functions feenableexcept and fedisableexcept to control the
3867 behaviour of individual exceptions have been added by Andreas Jaeger.
3869 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3871 * The resolver code has been updated from bind 8.2.3-T5B which supports
3872 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3875 This change could in some situations effect backward compatibility. Since
3876 now `_res' is a thread-local instead of a global variable, modifying it
3877 in one thread does not have any effect in other threads.
3879 The resolver library was also extended to allow IPv6 as the transport
3880 protocol for the requests. This work was done by Stig Venaas.
3882 * Compatibility code for K&R C compilers has been removed from the
3883 header files. A ISO C compiler is needed to use the library
3884 (conforming to either C89 or C99 standard).
3886 * Complete rewrite of the localedef program to support multibyte character
3887 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3888 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3889 Implemented by Ulrich Drepper.
3891 Bruno Haible significantly improved the generation and use of the data
3892 structures for the wide character tables.
3894 * Plural handling in gettext implemented by Ulrich Drepper.
3896 * The utmp daemon has been removed.
3898 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3900 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3903 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3905 * POSIX barriers implemented by Kaz Kylheku.
3907 * POSIX spawn function family implemented by Ulrich Drepper.
3909 * POSIX spinlocks are now available.
3911 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3913 * the configure option --enable-kernel=X.Y.Z allows to strip out
3914 compatibility for kernel versions before X.Y.Z. This is currently only
3915 implemented for Linux.
3917 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3918 field sin6_scope_id. This means that all programs using IPv6 should be
3919 recompiled. Don't expect binary compatibility with previous glibc
3922 * various conversion modules for IBM character sets contributed by
3925 * IA-64 port by Jes Sorensen and HJ Lu.
3939 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3941 * New xdr functions are added; some rpc functions are now 64bit clean.
3943 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3945 * Fixed known incompatibilities with glibc 2.0.
3947 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3949 * Optimized a number of functions (especially the ELF dynamic loader).
3951 * Update timezone data files.
3953 * lots of charmaps corrections
3955 * some new locale definitions and charmaps
3960 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3961 conform to POSIX member type requirements. Symbol versions have been
3962 adjusted as needed within the library, and for direct use by applications,
3963 but there is potential for problems if third-party libraries use
3964 struct timeval as part of their interface. This does not present
3965 a problem for X and other "essential" system libraries.
3967 * An additional locale model to support C++ Standard Library locale
3968 model and probably more was implemented by Ulrich Drepper.
3970 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3973 * Miles Bader provided the `argp' function family to support hierachical
3974 command line argument parsing, layered on top of getopt.
3976 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3978 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3981 * scanf recognizes the %a and %A format for scanning floating point numbers.
3983 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3984 information and interfaces for the available integer types.
3986 * about 130 new math functions were added to implement the ISO C9x math
3989 * the new header <complex.h> contains definitions of the complex math
3990 functions from ISO C 9X.
3992 * the new header <tgmath.h> defines generic macros to use complex or
3993 real valued functions.
3995 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3997 * Andreas Jaeger provided a test suite for the math library.
3999 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
4001 * Ulrich Drepper added character set conversion functions (iconv).
4003 * Optimized string functions have been added.
4005 * The localedata addon is now part of glibc.
4007 * An implementation of profiling shared libraries was added by Ulrich Drepper.
4009 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
4010 daemon for NSS (nscd).
4012 Missing a better place here are some numbers on improvements. Under
4013 Linux 2.1.125 un-tar-ing the kernel sources takes
4017 using local files 12.19s 6.88s 22.91s
4019 using NIS 13.92s 8.91s 26.34s
4021 using NIS & nscd 10.37s 7.34s 25.30s
4023 using NIS+ 27.57s 30.37s 640.46s
4025 using NIS+ & nscd 10.25s 7.83s 26.51s
4027 using NIS & old nscd [1] 13.83s 8.32s 29.60s
4029 Keep in mind that non-namelookup related operations dominate above times.
4030 It was just a common complain that using NIS+ unpacking the kernel is
4033 [1] The old nscd implementation is not available anymore since it was
4034 distributed with glibc up to version 2.0.98 and thus is now replaced.
4036 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
4038 * Mark Kettenis provided a Hesiod NSS module.
4040 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
4041 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
4043 * rcmd can now handle netgroups (Dick Streefland).
4045 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
4048 * Support for the IPv6 protocol has been added to the socket API, as per the
4049 latest draft standards.
4051 * Support for Linux 2.2 has been added.
4053 * Interface changes relative to the latest 2.0.x release:
4054 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4055 addseverity NEW: Unix98
4056 alphasort64 NEW: LFS
4057 argp_err_exit_status NEW: argp, GNU ext
4058 argp_error NEW: argp, GNU ext
4059 argp_failure NEW: argp, GNU ext
4060 argp_help NEW: argp, GNU ext
4061 argp_parse NEW: argp, GNU ext
4062 argp_program_bug_address NEW: argp, GNU ext
4063 argp_program_version NEW: argp, GNU ext
4064 argp_program_version_hook NEW: argp, GNU ext
4065 argp_state_help NEW: argp, GNU ext
4066 argp_usage NEW: argp, GNU ext
4067 authdes_create NEW: Secure RPC
4068 authdes_getucred NEW: Secure RPC
4069 authdes_pk_create NEW: Secure RPC
4070 backtrace NEW: GNU ext.
4071 backtrace_symbols NEW: GNU ext.
4072 backtrace_symbols_fd NEW: GNU ext.
4074 cacosf NEW: ISO C 9x
4075 cacosh NEW: ISO C 9x
4076 cacoshf NEW: ISO C 9x
4077 cacoshl NEW: ISO C 9x
4078 cacosl NEW: ISO C 9x
4085 casinf NEW: ISO C 9x
4086 casinh NEW: ISO C 9x
4087 casinhf NEW: ISO C 9x
4088 casinhl NEW: ISO C 9x
4089 casinl NEW: ISO C 9x
4091 catanf NEW: ISO C 9x
4092 catanh NEW: ISO C 9x
4093 catanhf NEW: ISO C 9x
4094 catanhl NEW: ISO C 9x
4095 catanl NEW: ISO C 9x
4096 cbc_crypt NEW: Secure RPC
4100 ccoshf NEW: ISO C 9x
4101 ccoshl NEW: ISO C 9x
4107 cimagf NEW: ISO C 9x
4108 cimagl NEW: ISO C 9x
4109 clearerr_locked REMOVED
4110 clntunix_create NEW: sunrpc ext
4112 clog10 NEW: ISO C 9x
4113 clog10f NEW: ISO C 9x
4114 clog10l NEW: ISO C 9x
4124 cprojf NEW: ISO C 9x
4125 cprojl NEW: ISO C 9x
4127 crealf NEW: ISO C 9x
4128 creall NEW: ISO C 9x
4133 csinhf NEW: ISO C 9x
4134 csinhl NEW: ISO C 9x
4137 csqrtf NEW: ISO C 9x
4138 csqrtl NEW: ISO C 9x
4142 ctanhf NEW: ISO C 9x
4143 ctanhl NEW: ISO C 9x
4145 des_setparity NEW: Secure RPC
4146 ecb_crypt NEW: Secure RPC
4147 endutxent NEW: Unix98
4149 exp10f NEW: ISO C 9x
4150 exp10l NEW: ISO C 9x
4154 fattach NEW: STREAMS
4155 fdetach NEW: STREAMS
4159 feclearexcept NEW: ISO C 9x
4160 fegetenv NEW: ISO C 9x
4161 fegetexceptflag NEW: ISO C 9x
4162 fegetround NEW: ISO C 9x
4163 feholdexcept NEW: ISO C 9x
4165 feraiseexcept NEW: ISO C 9x
4166 ferror_locked REMOVED
4167 fesetenv NEW: ISO C 9x
4168 fesetexceptflag NEW: ISO C 9x
4169 fesetround NEW: ISO C 9x
4170 fetestexcept NEW: ISO C 9x
4171 feupdateenv NEW: ISO C 9x
4172 fflush_locked REMOVED
4176 fgets_unlocked NEW: GNU ext.
4177 fileno_locked REMOVED
4189 fputc_locked REMOVED
4190 fputs_unlocked NEW: GNU ext.
4191 fread_unlocked NEW: GNU ext.
4196 fstatvfs NEW: Unix98
4200 ftruncate64 NEW: LFS
4202 fwrite_unlocked NEW: GNU ext.
4203 gai_strerror NEW: IPv6
4207 getchar_locked REMOVED
4209 getdate_err NEW: Unix98
4210 getdate_r NEW: GNU ext.
4212 getnameinfo NEW: IPv6
4213 getnetname NEW: Secure RPC
4214 getpmsg NEW: STREAMS
4215 getpt NEW: Unix98 PTY
4216 getrlimit64 NEW: LFS
4217 getutxent NEW: Unix98
4218 getutxid NEW: Unix98
4219 getutxline NEW: Unix98
4220 glob64 NEW: GNU ext.
4221 globfree64 NEW: GNU ext.
4222 gnu_get_libc_release NEW: GNU ext.
4223 gnu_get_libc_version NEW: GNU ext.
4224 grantpt NEW: Unix98 PTY
4225 host2netname NEW: Secure RPC
4227 iconv_close NEW: iconv
4228 iconv_open NEW: iconv
4229 if_freenameindex NEW: IPv6
4230 if_indextoname NEW: IPv6
4231 if_nameindex NEW: IPv6
4232 if_nametoindex NEW: IPv6
4233 in6addr_any NEW: IPv6
4234 in6addr_loopback NEW: IPv6
4235 inet6_isipv4mapped NEW: IPv6
4236 isastream NEW: STREAMS
4237 iswblank NEW: GNU ext.
4238 key_decryptsession NEW: Secure RPC
4239 key_decryptsession_pk NEW: Secure RPC
4240 key_encryptsession NEW: Secure RPC
4241 key_encryptsession_pk NEW: Secure RPC
4242 key_gendes NEW: Secure RPC
4243 key_get_conv NEW: Secure RPC
4244 key_secretkey_is_set NEW: Secure RPC
4245 key_setnet NEW: Secure RPC
4246 key_setsecret NEW: Secure RPC
4247 llrint NEW: ISO C 9x
4248 llrintf NEW: ISO C 9x
4249 llrintl NEW: ISO C 9x
4250 llround NEW: ISO C 9x
4251 llroundf NEW: ISO C 9x
4252 llroundl NEW: ISO C 9x
4257 lrintf NEW: ISO C 9x
4258 lrintl NEW: ISO C 9x
4259 lround NEW: ISO C 9x
4260 lroundf NEW: ISO C 9x
4261 lroundl NEW: ISO C 9x
4263 makecontext NEW: Unix98
4264 mempcpy NEW: GNU ext.
4267 modify_ldt NEW: kernel
4271 nearbyint NEW: ISO C 9x
4272 nearbyintf NEW: ISO C 9x
4273 nearbyintl NEW: ISO C 9x
4274 netname2host NEW: Secure RPC
4275 netname2user NEW: Secure RPC
4276 nexttoward NEW: ISO C 9x
4277 nexttowardf NEW: ISO C 9x
4278 nexttowardl NEW: ISO C 9x
4282 passwd2des NEW: Secure RPC
4284 pow10f NEW: GNU ext.
4285 pow10l NEW: GNU ext.
4288 printf_size NEW: GNU ext.
4289 printf_size_info NEW: GNU ext.
4290 profil_counter REMOVED
4291 pthread_mutexattr_getkind_np REPLACED
4292 pthread_mutexattr_setkind_np REPLACED
4293 ptsname NEW: Unix98 PTY
4294 ptsname_r NEW: Unix98 PTY
4296 putchar_locked REMOVED
4297 putgrent NEW: GNU ext.
4299 putpmsg NEW: STREAMS
4300 pututxline NEW: Unix98
4304 readdir64_r NEW: LFS
4305 remquo NEW: ISO C 9x
4306 remquof NEW: ISO C 9x
4307 remquol NEW: ISO C 9x
4309 roundf NEW: ISO C 9x
4310 roundl NEW: ISO C 9x
4312 scalbln NEW: ISO C 9x
4313 scalblnf NEW: ISO C 9x
4314 scalblnl NEW: ISO C 9x
4316 sendfile NEW: kernel
4317 setcontext NEW: Unix98
4318 setrlimit64 NEW: LFS
4319 setutxent NEW: Unix98
4321 sigignore NEW: Unix98
4322 sigqueue NEW: POSIX.1b
4323 sigrelse NEW: Unix98
4324 sigset NEW: POSIX.1b
4325 sigtimedwait NEW: POSIX.1b
4326 sigwaitinfo NEW: POSIX.1b
4327 sincos NEW: GNU ext.
4328 sincosf NEW: GNU ext.
4329 sincosl NEW: GNU ext.
4333 strcasestr NEW: GNU ext.
4334 strtoimax NEW: ISO C 9x
4335 strtoumax NEW: ISO C 9x
4336 strverscmp NEW: GNU ext.
4337 svcauthdes_stats NEW: Secure RPC
4338 svcunix_create NEW: sunrpc etx
4339 svcunixfd_create NEW: sunrpc ext
4340 swapcontext NEW: Unix98
4341 tcgetsid NEW: Unix98 PTY
4342 tdestroy NEW: GNU ext.
4343 tgamma NEW: ISO C 9x
4344 tgammaf NEW: ISO C 9x
4345 tgammal NEW: ISO C 9x
4349 truncf NEW: ISO C 9x
4350 truncl NEW: ISO C 9x
4352 unlockpt NEW: Unix98 PTY
4353 updwtmpx NEW: Unix98
4354 user2netname NEW: Secure RPC
4355 utmpxname NEW: Unix98
4356 versionsort NEW: GNU ext.
4357 versionsort64 NEW: GNU ext.
4359 wcscasecmp NEW: GNU ext.
4360 wcsncasecmp NEW: GNU ext.
4361 wcsnlen NEW: GNU ext.
4362 wcstoimax NEW: ISO C 9x
4363 wcstoll NEW: ISO C 9x
4364 wcstoull NEW: ISO C 9x
4365 wcstoumax NEW: ISO C 9x
4367 wordexp NEW: POSIX.2
4368 wordfree NEW: POSIX.2
4369 write_profiling REMOVED
4370 xdecrypt NEW: Secure RPC
4371 xdr_authdes_cred NEW: Secure RPC
4372 xdr_authdes_verf NEW: Secure RPC
4373 xdr_cryptkeyarg NEW: Secure RPC
4374 xdr_cryptkeyarg2 NEW: Secure RPC
4375 xdr_cryptkeyres NEW: Secure RPC
4376 xdr_getcredres NEW: Secure RPC
4377 xdr_key_netstarg NEW: Secure RPC
4378 xdr_key_netstres NEW: Secure RPC
4379 xdr_keybuf NEW: Secure RPC
4380 xdr_keystatus NEW: Secure RPC
4381 xdr_netnamestr NEW: Secure RPC
4382 xdr_sizeof NEW: Secure RPC
4383 xdr_unixcred NEW: sunrpc ext
4384 xencrypt NEW: Secure RPC
4385 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
4396 * inet_ntoa is thread-safe
4398 * updwtmp is moved from libutil to libc
4400 * rewrite of cbrt function
4402 * update of timezone data
4416 * add atoll function
4418 * fix complex problems in Berkeley DB code
4420 * fix math functions
4424 * fixed lots of header problems (especially Linux/GNU specific)
4426 * dynamic loader preserves all registers
4428 * Roland McGrath provided support for handling of auxiliary objects in
4429 the ELF dynamic loader.
4431 * support for parallel builds is improved
4435 * GNU extensions are no longer declared by default. To enable them you
4436 must define the macro `_GNU_SOURCE' in your program or compile with
4439 * The library has changed from using GNU ld symbol aliases to using weak
4440 symbols where available. The ELF object file format supports weak
4441 symbols; GNU ld also supports weak symbols in the a.out format. (There
4442 is also now support for other GNU ld extensions in ELF. Use the
4443 `--with-elf' option to configure to indicate you have ELF, and
4444 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
4445 of many files which contained only symbol aliases, reducing the size of
4446 the source and the compiled library; many other files were renamed to
4447 less cryptic names previously occupied by the symbol alias files.
4448 There is a new header file <elf.h> for programs which operate on
4449 files in the ELF format.
4451 * Converted to Autoconf version 2, so `configure' has more options.
4452 Run `configure --help' to see the details.
4454 * The library can now be configured to build profiling, highly-optimized
4455 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
4456 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
4457 `configure' enable building these extra libraries. The shared library is
4458 built by default when using both ELF and GNU ld. When shared libraries
4459 are enabled, the new library `-ldl' is available for arbitrary run-time
4460 loading of shared objects; its interface is defined in <dlfcn.h>. The
4461 new header file <link.h> gives access to the internals of the run-time
4462 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
4463 application of same name on other systems and it provides information
4464 about dynamically linked binaries.
4466 * The C library now provides the run-time support code for profiling
4467 executables compiled with `-pg'. Programs can control the profiling code
4468 through the interface in <sys/gmon.h>. The `gmon.out' files written by
4469 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
4470 the support for this file format was contributed by David Mosberger-Tang.
4472 * The math code has been replaced with a math library based on fdlibm from
4473 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
4474 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
4475 functions. The math functions now reside in a separate library, so
4476 programs using them will need to use `-lm' their linking commands.
4478 * John C. Bowman contributed optimized ix87 assembler inline functions.
4480 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
4481 mechanism similar to that found in Solaris 2. This is now used for the
4482 group, passwd, hosts, networks, services, protocols, rpc, ethers,
4483 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
4484 file controls what services are used for each individual database. This
4485 works by loading shared libraries with names specified in `nsswitch.conf',
4486 so service modules can be changed or added at any time without even
4487 relinking any program. Currently there are the file, db, and NIS based
4488 NSS services available.
4490 * The new functions `strtoq' and `strtouq' parse integer values from
4491 strings, like `strtol' and `strtoul', but they return `long long int' and
4492 `unsigned long long int' values, respectively (64-bit quantities).
4494 * The new functions `strtof' and `strtold' parse floating-point values from
4495 strings, like `strtod', but they return `float' and `long double' values,
4496 respectively (on some machines `double' and `long double' are the same).
4498 * Ulrich Drepper has contributed new implementations of the floating-point
4499 printing and reading code used in the `printf' family of functions and
4500 `strtod', `strtof', and `strtold'. These new functions are perfectly
4501 accurate, and much faster than the old ones.
4503 * The implementation of the POSIX locale model was completely rewritten by
4504 Ulrich Drepper. This includes the new programs `localedef' and `locale'
4505 to compile the POSIX locale definition.
4507 * The former dummy implementations of the strcoll and strxfrm function are
4508 now replaced by fully functional code contributed by Ulrich Drepper. The
4509 collation information comes from the POSIX locale definitions.
4511 * The new header <langinfo.h> defines an interface for accessing
4512 various locale-dependent data (using the locale chosen with `setlocale').
4514 * Ulrich Drepper has contributed a new suite of functions for operation on
4515 wide-character and multibyte-character strings, in <wchar.h>;
4516 and classification and case conversion of wide characters, in <wctype.h>.
4517 These new functions are conforming to the ISO C, Amendement 1 specification.
4519 * There is now a second implementation of the standard I/O library available.
4520 It comes from GNU libg++ as was written by Per Bothner, heavily modified
4521 by Hongjiu Lu and made thread safe by Ulrich Drepper.
4523 * You can now use positional parameter specifications in format strings
4524 for the `printf' and `scanf' families of functions. For example,
4525 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
4526 ``Number 6, Mr Jones''. This is mainly useful when providing different
4527 format strings for different languages, whose grammars may dictate
4528 different orderings of the values being printed. To support this
4529 feature, the interface for `register_printf_handler' has changed; see
4530 the header file <printf.h> for details.
4532 * The `printf' and `scanf' families of functions now understand a new
4533 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
4534 to group numbers as indicated by the locale; for `scanf' and friends, this
4535 says to accept as valid only a number with all the proper grouping
4536 separators in the right places. In the default "C" locale, numbers are
4537 not grouped; but locales for specific countries will define the usual
4538 conventions (i.e. separate thousands with `,' in the US locale).
4540 * The pgrp functions have been regularized, slightly incompatibly but much
4541 less confusingly. The core functions are now `getpgid' and `setpgid',
4542 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
4543 argument) and BSD `setpgrp' (identical to `setpgid') functions are
4544 provided for compatibility. There is no longer an incompatible `getpgrp'
4545 with an argument declared under _BSD_SOURCE; no BSD code uses it.
4547 * The new header file <fts.h> and suite of functions simplify programs that
4548 operate on directory trees. This code comes from 4.4 BSD.
4550 * The resolver code has been updated from the BIND 4.9.5-P1 release.
4551 Parts of the code were heavily modified by Ulrich Drepper to fit in the
4552 NSS scheme used in glibc.
4554 * There is a new malloc debugging hook `__memalign_hook'.
4556 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
4557 `unsigned int' in <sys/types.h>. These are for compatibility only and
4558 their use is discouraged.
4560 * The `-lmcheck' library to enable standard malloc debugging hooks is now
4561 done differently, so that it works even without GNU ld.
4563 * New function `euidaccess' checks allowed access to a file like `access',
4564 but using the effective IDs instead of the real IDs.
4566 * The time zone data files have been updated for the latest and greatest
4567 local time conventions of the countries of the world.
4569 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
4572 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
4573 for formatting floating-point numbers. They are provided only for
4574 compatibility; new programs should use `sprintf' instead. There are
4575 also equivalent function for the `long double' floating-point type and
4576 all functions also exist in a reentrant form.
4578 * The new auxiliary library `-lutil' from 4.4 BSD contains various
4579 functions for maintaining the login-record files (primarily of use to
4580 system programs such as `login'), and convenient functions for
4581 allocating and initializing a pseudo-terminal (pty) device.
4583 * Ulrich Drepper has contributed new support for System V style
4584 shared memory and IPC on systems that support it.
4586 * Ulrich Drepper has contributed several miscellaneous new functions found
4587 in System V: The `hsearch' family of functions provide an effective
4588 implementation of hash tables; `a64l' and `l64a' provide a very simple
4589 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
4592 * Ulrich Drepper has contributed new reentrant counterparts for the
4593 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
4595 * Ulrich Drepper has contributed new, highly-optimized versions of several
4596 string functions for the i486/Pentium family of processors.
4598 * Ulrich Drepper has updated the Linux-specific code, based largely
4599 on work done in Hongjiu Lu's version of GNU libc for Linux.
4600 The GNU library now supports Linux versions 2.0.10 and later,
4601 using the ELF object file format (i[3456]86-*-linux).
4603 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
4605 * David Mosberger-Tang and Richard Henderson have ported the C library
4606 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
4607 dynamic linking support for ELF/Alpha.
4609 * Richard Henderson contributed several Alpha optimized assembler function
4610 for arithmetic and string handling.
4612 * Ulrich Drepper has contributed a new set of message catalog functions to
4613 support multiple languages using the <libintl.h> interface, for use with
4614 his new package GNU gettext. Translation volunteers have contributed
4615 catalogs of the library's messages in Spanish, German, and Korean.
4617 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
4618 program and the `catgets' function for reading the catalog files it
4619 creates. (The <libintl.h> interface is preferred; we include the
4620 <nl_types.h> interface using `catgets' only for source compatibility with
4621 programs already written to use it.)
4623 * New header file <values.h> gives SVID-compatible names for <limits.h>
4626 * Various new macros, declarations, and small header files for compatibility
4629 * New function `group_member' is a convenient way to check if a process has
4630 a given effective group ID.
4632 * When using GCC 2.7 and later, the socket functions are now declared in a
4633 special way so that passing an argument of type `struct sockaddr_in *',
4634 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
4635 `struct sockaddr *' type, does not generate a type-clash warning.
4637 * New function `error' declared in header file <error.h> is a convenient
4638 function for printing error messages and optionally exiting; this is the
4639 canonical function used in GNU programs. The new functions `err', `warn',
4640 and friends in header file <err.h> are the canonical 4.4 BSD interface for
4641 doing the same thing.
4643 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
4644 POSIX.2 `glob' function to do ~ and {...} expansion.
4646 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
4647 `clearenv' which is used in POSIX.9 is also available.
4649 * New function `getsid' returns session ID number on systems that support it.
4651 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
4652 files <db.h> and <mpool.h> provide a rich set of functions for several
4653 types of simple databases stored in memory and in files, and <ndbm.h> is
4654 an old `ndbm'-compatible interface using the `db' functions. Link with
4655 `-ldb' to get these functions.
4657 * New macro `strdupa' copies a string like `strdup', but uses local stack
4658 space from `alloca' instead of dynamic heap space from `malloc'.
4660 * New function `strnlen' is like `strlen' but searches only a given maximum
4661 number of characters for the null terminator. `stpncpy', `strndup' and
4662 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
4665 * New function `statfs' in header <sys/statfs.h>.
4667 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
4668 provide convenient functions for operating on blocks of null-terminated
4671 * A new suite of functions in <utmp.h> handle all the details of reading
4672 and writing the utmp file.
4674 * An implementation of the NIS/YP(tm) based NSS service was contributed by
4677 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
4678 completely POSIX compliant and also implemented the extended functionality
4679 to handle alternate digit representation and alternate era date formats.
4681 * Ulrich Drepper provided an implementation of the `strptime' function
4682 defined in XPG4.2 which transforms a string into a `struct tm' value.
4684 * Paul Eggert provided the tzselect shell script as part of the timezone
4685 code. The shell script makes it easy to select the correct timezone
4688 * The implementation of the malloc family of functions is completely replaced
4689 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
4690 The implementation uses the mmap function (if available) and it is
4691 optimized for the use in multi threaded programs.
4693 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
4694 functions. This new functionality is usable by specifying a special
4695 salt string and it is compatible with implementation on *BSD systems.
4697 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
4698 `getsubopt' to handle second level command line options, `bsd_signal'
4699 to access BSD style `signal' functionality, the obsolete `regexp' style
4702 * the `lchown' function is available on system which support this
4705 * The implementation of the shadow password handling function was contributed
4708 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
4710 * POSIX.1g support was added. The <sys/select.h> header is available,
4711 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
4712 implementation of `getaddrinfo'.
4716 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
4718 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
4719 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
4721 * The new function `daemon' from 4.4 BSD is useful for server programs that
4722 want to put themselves in the background.
4724 * Joel Sherrill has contributed support for several standalone boards that
4725 run without an operating system.
4727 * `printf', `scanf' and friends now accept a `q' type modifier for long
4728 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
4730 * All of the code taken from BSD (notably most of the math and networking
4731 routines) has been updated from the BSD 4.4-Lite release.
4733 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
4735 * The new functions `getdomainname' and `setdomainname' fetch or change the
4736 YP/NIS domain name. These are system calls which exist on systems which
4739 * The time zone data files have been updated for the latest international
4742 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
4743 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
4747 * The C library now includes support for Sun RPC, from Sun's free
4748 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
4749 are included. (There is still no support for YP.)
4751 * Tom Quinn has contributed a port of the C library to SGI machines running
4752 Irix 4 (mips-sgi-irix4).
4754 * The new `lockf' function is a simplified interface to the locking
4755 facilities of `fcntl', included for compatibility.
4757 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
4759 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
4761 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
4764 * The error message printed by `assert' for a failed assertion now includes
4765 the name of the program (if using GNU ld) and the name of the calling
4766 function (with versions of GCC that support this).
4768 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
4770 * The library now includes the <sys/mman.h> header file and memory
4771 management functions `mmap', `munmap', `mprotect', `msync', and
4772 `madvise', on systems that support those facilities.
4774 * The interface for `mcheck' has changed slightly: the function called to
4775 abort the program when an allocation inconsistency is detected now takes
4776 an argument that indicates the type of failure. The new function
4777 `mprobe' lets you request a consistency check for a particular block at
4778 any time (checks are normally done only when you call `free' or `realloc'
4781 * It is now possible to easily cross-compile the C library, building on one
4782 system a library to run on another machine and/or operating system. All
4783 you need to do is set the variable `HOST_CC' in `configparms' to the
4784 native compiler for programs to run on the machine you are building on (a
4785 few generator programs are used on Unix systems); set `CC' to the
4788 * The new function `fexecve' (only implemented on the GNU system) executes
4789 a program file given a file descriptor already open on the file.
4793 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4794 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4796 * You can set the variable `libprefix' in `configparms' to specify a prefix
4797 to be prepended to installed library files; this makes it easy to install
4798 the GNU C library to be linked as `-lgnuc' or whatever.
4800 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4801 copies a limited number of characters from a string, and returns the
4802 address of the last character written.
4804 * You no longer need to check for whether the installed `stddef.h' is
4805 compatible with the GNU C library. configure now checks for you.
4807 * You can now define a per-stream `fileno' function to convert the
4808 stream's cookie into an integral file descriptor.
4810 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4811 allocates zero bytes of storage, and returns a unique pointer which
4812 you can pass to `realloc' or `free'. The behavior is undefined if
4813 you dereference this pointer.
4815 * The C library now runs on Sony NEWS m68k machines running either
4816 NewsOS 3 or NewsOS 4.
4818 * The new `syscall' function is a system-dependent primitive function
4819 for invoking system calls. It has the canonical behavior on Unix
4820 systems, including unreliable return values for some calls (such as
4821 `pipe', `fork' and `getppid').
4823 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4824 to `EAGAIN', which is the preferred name. On systems whose kernels
4825 use two distinct codes, the C library now translates EWOULDBLOCK to
4826 EAGAIN in every system call function.
4830 * The GNU C Library Reference Manual is now distributed with the library.
4831 `make dvi' will produce a DVI file of the printed manual.
4832 `make info' will produce Info files that you can read on line using C-h i
4833 in Emacs or the `info' program.
4834 Please send comments on the manual to bug-glibc-manual@gnu.org.
4836 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4838 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4840 * Jason Merrill has contributed a port to the Sequent Symmetry running
4841 Dynix version 3 (i386-sequent-dynix).
4843 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4844 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4846 * New function `memory_warnings' lets you arrange to get warnings when
4847 malloc is running out of memory to allocate, like Emacs gives you.
4849 * The C library now contains the relocating allocator used in Emacs 19 for
4850 its editing buffers. This allocator (ralloc) minimizes allocation
4851 overhead and fragmentation by moving allocated regions around whenever it
4852 needs to. You always refer to a ralloc'd region with a "handle" (a
4853 pointer to a pointer--an object of type `void **').
4855 * There is a new `printf' format: `%m' gives you the string corresponding
4856 to the error code in `errno'.
4858 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4859 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4860 pass, the `a' modifier says to fill in a `char **' you pass with a
4863 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4864 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4865 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4867 * `mkstemp' is a traditional Unix function to atomically create and open a
4868 uniquely-named temporary file.
4872 * The standard location for the file that says what the local timezone is
4873 has changed again. It is now `/usr/local/etc/localtime' (or more
4874 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4876 * The distribution no longer contains any files with names longer than 14
4879 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4880 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4882 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4886 * The configuration process has changed quite a bit. The `configure'
4887 script is now used just like the configuration scripts for other GNU
4888 packages. The `sysdeps' directory hierarchy is much rearranged.
4889 The file `INSTALL' explains the new scheme in detail.
4891 * The header files no longer need to be processed into ANSI C and
4892 traditional C versions. There is just one set of files to install, and
4893 it will work with ANSI or old C compilers (including `gcc -traditional').
4895 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4896 MIPS DECStation running Ultrix 4.
4898 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4899 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4900 made itself into a shared library.
4902 * Yet further improved support for the i386, running 4.3 BSD-like systems
4903 (such as Mach 3 with the Unix single-server), or System V.
4905 * New function `strncasecmp' to do case-insensitive string comparison
4906 with limited length.
4908 * New function `strsep' is a reentrant alternative to `strtok'.
4910 * New functions `scandir' and `alphasort' for searching directories.
4912 * New function `setenv' is a better interface to `putenv'.
4914 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4915 function for traversing a directory tree.
4917 * The GNU obstack package is now also part of the C library.
4918 The new function `open_obstack_stream' creates a stdio stream that
4919 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4920 formatted output directly to an obstack.
4922 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4923 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4925 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4927 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4928 things to your strings.
4930 * There are some new test programs: test-fseek, testmb, and testrand.
4932 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4933 These ports are not finished, but are a good starting place for really
4934 supporting those systems.
4936 * `/etc/localtime' is now the standard location for the file that says what
4937 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4938 This follows the general principle that `/etc' is the place for all local
4939 configuration files.
4941 * The C library header files now use `extern "C"' when used by the C++
4942 compiler, so the C library should now work with C++ code.
4944 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4945 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4948 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4949 function which uses the `merge sort' algorithm, and is said to be
4950 significantly faster than the old GNU `qsort' function. Merge sort is
4951 now the standard `qsort' function. The new algorithm can require a lot
4952 of temporary storage; so, the old sorting function is called when the
4953 required storage is not available.
4955 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4956 provides the Unix `crypt' function, plus some other entry points.
4958 * The code and header files taken from 4.4 BSD have been updated with the
4959 latest files released from Berkeley.
4961 ----------------------------------------------------------------------
4962 Copyright information:
4964 Copyright (C) 1992-2018 Free Software Foundation, Inc.
4966 Permission is granted to anyone to make or distribute verbatim copies
4967 of this document as received, in any medium, provided that the
4968 copyright notice and this permission notice are preserved,
4969 thus giving the recipient permission to redistribute in turn.
4971 Permission is granted to distribute modified versions
4972 of this document, or of portions of it,
4973 under the above conditions, provided also that they
4974 carry prominent notices stating who last changed them.
4977 version-control: never