1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <http://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
10 * The minimum Linux kernel version that this version of the GNU C Library
11 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
12 kernel version 2.6.32 or later suffices (on architectures that already
13 required kernel versions more recent than 3.2, those requirements remain
14 unchanged). Linux 3.2 or later kernel headers are required on all
17 * The pap_AN locale has been deleted. This has been deprecated for a long
18 time. It has been replaced by pap_AW & pap_CW, both of which have long
19 been included in previous releases.
21 * The readdir_r and readdir64_r functions have been deprecated. It is
22 recommended to use readdir and readdir64 instead.
24 * The type “union wait” has been removed. It was deprecated in the early
25 1990s and never part of POSIX. Application code should use the int type
26 instead of “union wait”.
28 * A new NSS action is added to facilitate large distributed system
29 administration. The action, MERGE, allows remote user stores like LDAP
30 to be merged into local user stores like /etc/groups in order to provide
31 easy to use, updated, and managed sets of merged credentials. The new
32 action can be used by configuring it in /etc/nsswitch.conf:
33 group: files [SUCCESS=merge] nis
34 Implemented by Stephen Gallagher (Red Hat).
36 * The deprecated __malloc_initialize_hook variable has been removed from the
39 Security related changes:
41 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
42 could result in a stack overflow when getnetbyname was called with an
43 overly long name. (CVE-2016-3075)
45 * Previously, getaddrinfo copied large amounts of address data to the stack,
46 even after the fix for CVE-2013-4458 has been applied, potentially
47 resulting in a stack overflow. getaddrinfo now uses a heap allocation
48 instead. Reported by Michael Petlan. (CVE-2016-3706)
50 * The glob function suffered from a stack-based buffer overflow when it was
51 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
52 Reported by Alexander Cherepanov. (CVE-2016-1234)
54 * The Sun RPC UDP client could exhaust all available stack space when
55 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
56 alloca plugin for GCC. (CVE-2016-4429)
58 The following bugs are resolved with this release:
60 [The release manager will add the list generated by
61 scripts/list-fixed-bugs.py just before the release.]
65 * Unicode 8.0.0 Support: Character encoding, character type info, and
66 transliteration tables are all updated to Unicode 8.0.0, using new
67 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
68 These updates cause user visible changes, such as the fixes for bugs
71 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
72 kernel-internal CPU set size. This means that requests that change the
73 CPU affinity which failed before (for example, an all-ones CPU mask) will
74 now succeed. Applications that need to determine the effective CPU
75 affinities need to call sched_getaffinity or pthread_getaffinity_np after
76 setting it because the kernel can adjust it (and the previous size check
77 would not detect this in the majority of cases).
79 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
80 the following new symbols are used: fts64_children, fts64_close,
81 fts64_open, fts64_read and fts64_set.
83 * getaddrinfo now detects certain invalid responses on an internal netlink
84 socket. If such responses are received, an affected process will
85 terminate with an error message of "Unexpected error <number> on netlink
86 descriptor <number>" or "Unexpected netlink response of size <number> on
87 descriptor <number>". The most likely cause for these errors is a
88 multi-threaded application which erroneously closes and reuses the netlink
89 file descriptor while it is used by getaddrinfo.
91 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
92 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
93 unnecessary serialization of memory allocation requests across threads.
94 The defect is now corrected. Users should see a substantial increase in
95 the concurent throughput of allocation requests for applications which
96 trigger this bug. Affected applications typically create and
97 destroy threads frequently. (Bug 19048 was reported and analyzed by
100 * There is now a --disable-timezone-tools configure option for disabling the
101 building and installing of the timezone related utilities (zic, zdump, and
102 tzselect). This is useful for people who build the timezone data and code
103 independent of the GNU C Library.
105 * The obsolete header <regexp.h> has been removed. Programs that require
106 this header must be updated to use <regex.h> instead.
108 * The obsolete functions bdflush, create_module, get_kernel_syms,
109 query_module and uselib are no longer available to newly linked binaries;
110 the header <sys/kdaemon.h> has been removed. These functions and header
111 were specific to systems using the Linux kernel and could not usefully be
112 used with the GNU C Library on systems with version 2.6 or later of the
115 * Optimized string, wcsmbs and memory functions for IBM z13.
116 Implemented by Stefan Liebler.
118 * Newly linked programs that define a variable called signgam will no longer
119 have it set by the lgamma, lgammaf and lgammal functions. Programs that
120 require signgam to be set by those functions must ensure that they use the
121 variable provided by the GNU C Library and declared in <math.h>, without
122 defining their own copy.
124 * The minimum GCC version that can be used to build this version of the GNU
125 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
126 still be used to compile programs using the GNU C Library.
128 Security related changes:
130 * An out-of-bounds value in a broken-out struct tm argument to strftime no
131 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
133 * The LD_POINTER_GUARD environment variable can no longer be used to disable
134 the pointer guard feature. It is always enabled. Previously,
135 LD_POINTER_GUARD could be used to disable security hardening in binaries
136 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
139 * An integer overflow in hcreate and hcreate_r could lead to an
140 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
142 * The catopen function no longer has unbounded stack usage. Reported by
145 * The nan, nanf and nanl functions no longer have unbounded stack usage
146 depending on the length of the string passed as an argument to the
147 functions. Reported by Joseph Myers. (CVE-2014-9761)
149 * A stack-based buffer overflow was found in libresolv when invoked from
150 libnss_dns, allowing specially crafted DNS responses to seize control
151 of execution flow in the DNS client. The buffer overflow occurs in
152 the functions send_dg (send datagram) and send_vc (send TCP) for the
153 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
154 family. The use of AF_UNSPEC triggers the low-level resolver code to
155 send out two parallel queries for A and AAAA. A mismanagement of the
156 buffers used for those queries could result in the response of a query
157 writing beyond the alloca allocated buffer created by
158 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
159 the overflow. Thanks to the Google Security Team and Red Hat for
160 reporting the security impact of this issue, and Robert Holiday of
161 Ciena for reporting the related bug 18665. (CVE-2015-7547)
163 The following bugs are resolved with this release:
165 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
166 [887] math: Math library function "logb" and "nextafter" inconsistent
167 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
168 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
169 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
170 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
172 [4404] localedata: German translation of "Alarm clock" is misleading
173 [6799] math: nextafter() and nexttoward() doen't set errno on
174 overflow/underflow errors
175 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
177 [10432] nis: _nss_nis_setnetgrent assertion failure
178 [11460] libc: fts has no LFS support
179 [12926] network: getaddrinfo()/make_request() may spin forever
180 [13065] nptl: Race condition in pthread barriers
181 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
182 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
184 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
185 [14912] libc: Rename non-installed bits/*.h headers
186 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
187 [15367] math: Let gcc use __builtin_isinf
188 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
189 [15421] math: lgamma wrongly sets signgam for ISO C
190 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
191 FE_INVALID with argument out of range
192 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
194 [15786] dynamic-link: ifunc resolver functions can smash function
196 [15918] math: Unnecessary check for equality in hypotf()
197 [16061] localedata: Review / update transliteration data
198 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
200 [16141] time: strptime %z offset restriction
201 [16171] math: drem should be alias of remainder
202 [16296] math: fegetround is pure?
203 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
204 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
206 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
207 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
209 [16422] math: [powerpc] math-float, math-double failing llrint tests with
210 "Exception "Inexact" set" on ppc32
211 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
212 [16517] math: Missing underflow exception from tanf/tan/tanl
213 [16519] math: Missing underflow exception from sinhf
214 [16520] math: Missing underflow exception from tanhf
215 [16521] math: Missing underflow exception from exp2
216 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
218 [16734] stdio: fopen calls mmap to allocate its buffer
219 [16961] math: nan function incorrect handling of bad sequences
220 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
221 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
222 [16985] locale: localedef: confusing error message when opening output
224 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
225 [17197] locale: Redundant shift character in iconv conversion output at
227 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
228 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
229 [17250] dynamic-link: static linking breaks nss loading
230 (getaddrinfo/getpwnam/etc...)
231 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
233 [17441] math: isnan() should use __builtin_isnan() in GCC
234 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
235 (related to lock elision)
236 [17787] manual: Exponent on page 324 of the PDF ends prematurely
237 [17886] time: strptime should be able to parse "Z" as a timezone with %z
238 [17887] time: strptime should be able to parse "+01:00" style timezones
239 [17905] libc: catopen() Multiple unbounded stack allocations
241 [18084] libc: backtrace (..., 0) dumps core on x86
242 [18086] libc: nice() sets errno to 0 on success
243 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
244 is too large (CVE-2015-8778)
245 [18251] dynamic-link: SONAME missing when audit modules provides path
246 [18265] libc: add attributes for wchar string and memory functions
247 [18370] math: csqrt missing underflows
248 [18421] libc: [hppa] read-only segment has dynamic relocations
249 [18472] libc: Obsolete syscall wrappers should be compat symbols
250 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
251 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
252 [18525] localedata: Remove locale timezone information
253 [18560] libc: [powerpc] spurious bits/ipc.h definitions
254 [18568] localedata: Update locale data to Unicode 8.0
255 [18589] locale: sort-test.sh fails at random
256 [18595] math: ctan, ctanh missing underflows
257 [18604] libc: assert macro-expands its argument
258 [18610] math: S390: fetestexcept() reports any exception if DXC-code
259 contains a vector instruction exception.
260 [18611] math: j1, jn missing errno setting on underflow
261 [18618] localedata: sync Chechen locale definitions with other *_RU
263 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
264 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
265 [18665] network: In send_dg, the recvfrom function is NOT always using the
266 buffer size of a newly created buffer (CVE-2015-7547)
267 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
269 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
271 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
272 [18699] math: tilegx cproj() for various complex infinities does not yield
274 [18724] libc: Harden put*ent functions against data injection
275 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
276 [18755] build: build errors with -DNDEBUG
277 [18757] stdio: fmemopen fails to set errno on failure
278 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
280 [18781] libc: openat64 lacks O_LARGEFILE
281 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
282 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
283 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
284 [18790] math: [ldbl-128ibm] tanhl inaccurate
285 [18795] libc: stpncpy fortification misses buffer lengths that are
287 [18796] build: build fails for --disable-mathvec
288 [18803] math: hypot missing underflows
289 [18820] stdio: fmemopen may leak memory on failure
290 [18823] math: csqrt spurious underflows
291 [18824] math: fma spurious underflows
292 [18825] math: pow missing underflows
293 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
294 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
295 [18870] build: sem_open.c fails to compile with missing symbol
297 [18872] stdio: Fix memory leak in printf_positional
298 [18873] libc: posix_fallocate overflow check ineffective
299 [18875] math: Excess precision leads incorrect libm
300 [18877] libc: arm: mmap offset regression
301 [18887] libc: memory corruption when using getmntent on blank lines
302 [18918] localedata: hu_HU: change time to HH:MM:SS format
303 [18921] libc: Regression: extraneous stat() and fstat() performed by
305 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
306 binaries (CVE-2015-8777)
307 [18951] math: tgamma missing underflows
308 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
310 [18953] localedata: lt_LT: change currency symbol to the euro
311 [18956] math: powf inaccuracy
312 [18961] math: [i386] exp missing underflows
313 [18966] math: [i386] exp10 missing underflows
314 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
315 [18969] build: multiple string test failures due to missing locale
317 [18970] libc: Reference of pthread_setcancelstate in libc.a
318 [18977] math: float / long double Bessel functions not in XSI POSIX
319 [18980] math: i386 libm functions return with excess range and precision
320 [18981] math: i386 scalb*, ldexp return with excess range and precision
321 [18982] stdio: va_list and vprintf
322 [18985] time: Passing out of range data to strftime() causes a segfault
324 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
325 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
326 [19012] locale: iconv_open leaks memory on error path
327 [19016] math: clog, clog10 inaccuracy
328 [19018] nptl: Mangle function pointers in tls_dtor_list
329 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
330 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
331 [19048] malloc: malloc: arena free list can become cyclic, increasing
333 [19049] math: [powerpc] erfc incorrect zero sign
334 [19050] math: [powerpc] log* incorrect zero sign
335 [19058] math: [x86_64] Link fail with -fopenmp and -flto
336 [19059] math: nexttoward overflow incorrect in non-default rounding modes
337 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
338 [19074] network: Data race in _res_hconf_reorder_addrs
339 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
340 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
341 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
343 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
345 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
346 [19086] manual: posix_fallocate64 documented argument order is wrong.
347 [19088] math: lround, llround missing exceptions close to overflow
349 [19094] math: lrint, llrint missing exceptions close to overflow threshold
350 [19095] math: dbl-64 lrint incorrect for 64-bit long
351 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
352 [19124] dynamic-link: ld.so failed to build with older assmebler
353 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
354 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
355 [19134] math: [powerpc32] lround, lroundf spurious exceptions
356 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
357 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
358 pthread_setaffinity_np
359 [19156] math: [ldbl-128] j0l spurious underflows
360 [19164] nptl: tst-getcpu fails with many possible CPUs
361 [19168] math: math/test-ildoubl and math/test-ldouble failure
362 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
363 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
365 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
366 (FE_NOMASK_ENV) do not clear SSE exceptions
367 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
368 _int_new_arena/reused_arena
369 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
370 [19201] math: dbl-64 remainder incorrect sign of zero result
371 [19205] math: bits/math-finite.h conditions do not match math.h and
373 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
374 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
375 for C99-based standards
376 [19212] libc: features.h not -Wundef clean
377 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
379 [19214] libc: Family and model identification for AMD CPU's are incorrect.
380 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
381 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
383 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
385 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
387 [19242] libc: strtol incorrect in Turkish locales
388 [19243] malloc: reused_arena can pick an arena on the free list, leading
389 to an assertion failure and reference count corruption
390 [19253] time: tzset() ineffective when temporary TZ did not include DST
392 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
393 [19270] math: [hppa] Shared libm missing __isnanl
394 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
395 MAP_HUGETLB and MAP_STACK defines
396 [19313] nptl: Wrong __cpu_mask for x32
397 [19347] libc: grantpt: try to force a specific gid even without pt_chown
398 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
399 [19350] math: [ldbl-128ibm] sinhl spurious overflows
400 [19351] math: [ldbl-128ibm] logl inaccurate near 1
401 [19363] time: x32: times() return value wrongly truncates/sign extends
403 [19367] dynamic-link: Improve branch prediction on Silvermont
404 [19369] network: Default domain name not reset by res_ninit when "search"
405 / "domain" entry is removed from resolv.conf
406 [19375] math: powerpc: incorrect results for POWER7 logb with negative
408 [19385] localedata: bg_BG: time separator should be colon, not comma
409 [19408] libc: linux personality syscall wrapper may erroneously return an
410 error on 32-bit architectures
411 [19415] libc: dladdr returns wrong names on hppa
412 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
413 IBM905, IBM907, and IBM909
414 [19439] math: Unix98 isinf and isnan functions conflict with C++11
415 [19443] build: build failures with -DDEBUG
416 [19451] build: Make check fails on test-double-vlen2
417 [19462] libc: Glibc failed to build with -Os
418 [19465] math: Wrong code with -Os
419 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
421 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
423 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
424 [19486] math: S390: Math tests fail with "Exception Inexact set".
425 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
426 [19550] libc: [mips] mmap negative offset handling inconsistent with other
428 [19590] math: Fail to build shared objects that use libmvec.so functions.
432 * The following bugs are resolved with this release:
434 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
435 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
436 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
437 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
438 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
439 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
440 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
441 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
442 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
443 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
444 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
445 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
446 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
447 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
448 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
449 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
450 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
451 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
452 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
453 18657, 18676, 18694, 18696, 18887.
455 * Cache information can be queried via sysconf() function on s390 e.g. with
456 _SC_LEVEL1_ICACHE_SIZE as argument.
458 * A buffer overflow in gethostbyname_r and related functions performing DNS
459 requests has been fixed. If the NSS functions were called with a
460 misaligned buffer, the buffer length change due to pointer alignment was
461 not taken into account. This could result in application crashes or,
462 potentially arbitrary code execution, using crafted, but syntactically
463 valid DNS responses. (CVE-2015-1781)
465 * The time zone file parser has been made more robust against crafted time
466 zone files, avoiding heap buffer overflows related to the processing of
467 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
468 large time zone data files. Overly long time zone specifiers in the TZ
469 variable no longer result in stack overflows and crashes.
471 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
472 for LD and GD on x86 and x86-64, has been implemented. You will need
473 binutils-2.24 or later to enable this optimization.
475 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
476 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
477 Hat). These updates cause user visible changes, such as the fix for bug
480 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
481 and getXXbyYY NSS calls for the same database, causing a denial-of-service
482 condition in some applications.
484 * Added vector math library named libmvec with the following vectorized x86_64
485 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
487 The library can be disabled with --disable-mathvec. Use of the functions is
488 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
489 Shared library libmvec.so is linked in as needed when using -lm (no need to
490 specify -lmvec explicitly for not static builds).
491 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
493 * A new fmemopen implementation has been added with the goal of POSIX
494 compliance. The new implementation fixes the following long-standing
495 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
496 old implementation is still present for use be by existing binaries.
498 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
499 releases. It has been fixed to match 2.19 and older, but binaries built
500 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
502 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
503 Contributed by Roland McGrath (Google).
505 * The header <regexp.h> is deprecated, and will be removed in a future
506 release. Use of this header will trigger a deprecation warning.
507 Application developers should update their code to use <regex.h> instead.
509 This header was formerly part of SUS, but was deprecated in 1994 and
510 removed from the standard in 2001. Also, the glibc implementation
511 leaks memory. See BZ#18681 for more details.
515 * The following bugs are resolved with this release:
517 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
518 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
519 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
520 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
521 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
522 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
523 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
524 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
525 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
526 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
529 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
530 too little memory for the to-be-scanned arguments and overflow the
531 allocated buffer. The implementation now correctly computes the required
532 buffer size when using malloc, and switches to malloc from alloca as
535 * A new semaphore algorithm has been implemented in generic C code for all
536 machines. Previous custom assembly implementations of semaphore were
537 difficult to reason about or ensure that they were safe. The new version
538 of semaphore supports machines with 64-bit or 32-bit atomic operations.
539 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
540 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
542 * Port to Altera Nios II has been contributed by Mentor Graphics.
544 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
545 implementations for powerpc64/powerpc64le.
546 Implemented by Adhemerval Zanella (IBM).
548 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
549 and powerpc64le. This may improve lock scaling of existing programs on
550 HTM capable systems. The lock elision code is only enabled with
551 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
552 powerpc will issue a transaction abort on every syscall to avoid side
553 effects being visible outside transactions.
555 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
556 AArch64. Contributed by ARM Ltd.
558 * i386 memcpy functions optimized with SSE2 unaligned load/store.
560 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
561 under certain input conditions resulting in the execution of a shell for
562 command substitution when the application did not request it. The
563 implementation now checks WRDE_NOCMD immediately before executing the
564 shell and returns the error WRDE_CMDSUB as expected.
566 * CVE-2012-3406 printf-style functions could run into a stack overflow when
567 processing format strings with a large number of format specifiers.
569 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
570 infinite loop if the DNS response contained a PTR record of an unexpected
573 * The minimum GCC version that can be used to build this version of the GNU
574 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
575 still be used to compile programs using the GNU C Library.
577 * The GNU C Library is now built with -Werror by default. This can be
578 disabled by configuring with --disable-werror.
580 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
582 * The obsolete sigvec function has been removed. This was the original
583 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
584 programs have been using instead for about 25 years. Of course, ABI
585 compatibility for old binaries using sigvec remains intact.
587 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
588 with newer versions of bison.
590 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
591 The original MIPS o32 hard-float ABI requires an FPU where double-precision
592 registers overlay two consecutive single-precision registers. MIPS32R2
593 introduced a new FPU mode (FR=1) where double-precision registers extend the
594 corresponding single-precision registers which is incompatible with the
595 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
596 require the use of FR=1 making a transition necessary. New o32 ABI
597 extensions enable users to migrate over time from the original o32 ABI
598 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
599 tracks the ABI of any loaded object and verifies that new objects are
600 compatible. Mode transitions will also be requested as required and
601 unsupportable objects will be rejected. The ABI checks include both soft and
602 hard float ABIs for o32, n32 and n64.
604 GCC 5 with GNU binutils 2.25 onwards:
605 It is strongly recommended that all o32 system libraries are built using the
606 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
607 with the original and all new o32 ABI extensions. Configure a MIPS GCC
608 compiler using --with-fp-32=xx to set this by default.
612 * The following bugs are resolved with this release:
614 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
615 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
616 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
617 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
618 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
619 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
620 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
621 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
622 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
623 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
624 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
625 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
626 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
627 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
628 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
630 * Reverted change of ABI data structures for s390 and s390x:
631 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
632 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
633 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
634 are preserved pointing straight to the same implementation as the old ones.
635 Given that, new callers will simply provide a too-big buffer to these
636 functions. Any applications/libraries out there that embed jmp_buf or
637 ucontext_t in an ABI-relevant data structure that have already been rebuilt
638 against 2.19 headers will have to rebuilt again. This is necessary in any
639 case to revert the breakage in their ABI caused by the glibc change.
641 * Support for file description locks is added to systems running the
642 Linux kernel. The standard file locking interfaces are extended to
643 operate on file descriptions, not file descriptors, via the use of
644 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
645 are associated with an open file instead of a process.
647 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
649 * The minimum Linux kernel version that this version of the GNU C Library
650 can be used with is 2.6.32.
652 * Running the testsuite no longer terminates as soon as a test fails.
653 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
654 with PASS or FAIL lines for individual tests. A summary of the results is
655 printed, including a list of failing lists, and "make check" exits with
656 error status if there were any unexpected failures. "make check
657 stop-on-test-failure=y" may be used to keep the old behavior.
659 * The am33 port, which had not worked for several years, has been removed
662 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
663 supported; they now act the same as _DEFAULT_SOURCE (but generate a
664 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
665 conflicted with POSIX (support for which was removed in 2.19), the
666 interfaces those macros enabled remain available when compiling with
667 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
670 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
672 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
673 This may improve lock scaling of existing programs on TX capable systems.
674 The lock elision code is only built with --enable-lock-elision=yes and
675 then requires a GCC version supporting the TX builtins. With lock elision
676 default mutexes are elided via __builtin_tbegin, if the cpu supports
677 transactions. By default lock elision is not enabled and the elision code
680 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
681 copy the path argument. This allowed programs to cause posix_spawn to
682 deference a dangling pointer, or use an unexpected pathname argument if
683 the string was modified after the posix_spawn_file_actions_addopen
686 * All supported architectures now use the main glibc sysdeps directory
687 instead of some being in a separate "ports" directory (which was
688 distributed separately before glibc 2.17).
690 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
691 On configurations that support it (all Linux configurations), it's now
692 used regardless of the --enable-add-ons switch to configure. It is no
693 longer possible to build such configurations without pthreads support.
695 * Locale names, including those obtained from environment variables (LANG
696 and the LC_* variables), are more tightly checked for proper syntax.
697 setlocale will now fail (with EINVAL) for locale names that are overly
698 long, contain slashes without starting with a slash, or contain ".." path
699 components. (CVE-2014-0475) Previously, some valid locale names were
700 silently replaced with the "C" locale when running in AT_SECURE mode
701 (e.g., in a SUID program). This is no longer necessary because of the
704 * On x86-64, the dynamic linker's lazy-binding support is now compatible
705 with application code using Intel MPX instructions. (With all previous
706 versions, the MPX register state could be clobbered when making calls
707 into or out of a shared library.) Note that while the new dynamic
708 linker is compatible with all known x86 hardware whether or not it
709 supports Intel MPX, some x86 instruction-set emulators might fail to
710 handle the new instruction encodings. This is known to affect Valgrind
711 versions up through 3.9 (but will be fixed in the forthcoming 3.10
712 release), and might affect other tools that do instruction emulation.
714 * Support for loadable gconv transliteration modules has been removed.
715 The support for transliteration modules has been non-functional for
716 over a decade, and the removal is prompted by security defects. The
717 normal gconv conversion modules are still supported. Transliteration
718 with //TRANSLIT is still possible, and the //IGNORE specifier
719 continues to be supported. (CVE-2014-5119)
721 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
722 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
723 resulting a denial-of-service security vulnerability in applications which
724 use functions related to iconv. (CVE-2014-6040)
728 * The following bugs are resolved with this release:
730 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
731 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
732 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
733 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
734 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
735 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
736 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
737 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
738 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
739 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
740 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
741 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
742 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
743 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
744 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
745 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
746 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
747 16431, 16453, 16474, 16506, 16510, 16529
749 * Slovenian translations for glibc messages have been contributed by the
750 Translation Project's Slovenian team of translators.
752 * The public headers no longer use __unused nor __block. This change is to
753 support compiling programs that are derived from BSD sources and use
754 __unused internally, and to support compiling with Clang's -fblock
755 extension which uses __block.
757 * CVE-2012-4412 The strcoll implementation caches indices and rules for
758 large collation sequences to optimize multiple passes. This cache
759 computation may overflow for large collation sequences and may cause a
760 stack or buffer overflow. This is now fixed to use a slower algorithm
761 which does not use a cache if there is an integer overflow.
763 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
764 rules for large collation sequences to optimize multiple passes and falls
765 back to alloca if malloc fails, resulting in a possible stack overflow.
766 The implementation now falls back to an uncached collation sequence lookup
769 * CVE-2013-4788 The pointer guard used for pointer mangling was not
770 initialized for static applications resulting in the security feature
771 being disabled. The pointer guard is now correctly initialized to a
772 random value for static applications. Existing static applications need
773 to be recompiled to take advantage of the fix (bug 15754).
775 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
776 to the d_name member of struct dirent, or omit the terminating NUL
777 character. (Bugzilla #14699).
779 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
780 aligned_alloc functions could allocate too few bytes or corrupt the
781 heap when passed very large allocation size values (Bugzilla #15855,
784 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
785 for AF_INET6 has been fixed (Bugzilla #16072).
787 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
788 pap_CW, quz_PE, the_NP.
790 * Substantially revised locales: gd_GB, ht_HT
792 * The LC_ADDRESS field was updated to support country_car for almost all
795 * ISO 1427 definitions were updated.
797 * ISO 3166 definitions were updated.
799 * The localedef utility now supports --big-endian and --little-endian
800 command-line options to generate locales for a different system from that
801 for which the C library was built.
803 * Binary locale files now only depend on the endianness of the system for
804 which they are generated and not on other properties of that system. As a
805 consequence, binary files generated with new localedef may be incompatible
806 with old versions of the GNU C Library, and binary files generated with
807 old localedef may be incompatible with this version of the GNU C Library,
808 in the following circumstances:
810 + Locale files may be incompatible on m68k systems.
812 + Locale archive files (but not separate files for individual locales) may
813 be incompatible on systems where plain "char" is signed.
815 * The configure option --disable-versioning has been removed. Builds with
816 --disable-versioning had not worked for several years.
818 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
819 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
821 * SystemTap probes for malloc have been introduced.
823 * SystemTap probes for slow multiple precision fallback paths of
824 transcendental functions have been introduced.
826 * Support for powerpc64le has been added.
828 * The soft-float powerpc port now supports e500 processors.
830 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
832 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
833 set of header declarations that are enabled by default, even when other
834 feature test macros or compiler options such as -std=c99 would otherwise
835 disable some of those declarations.
837 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
838 conflict with POSIX. The libbsd-compat library (which was a dummy library
839 that did nothing) has also been removed.
841 * Preliminary documentation about Multi-Thread, Async-Signal and
842 Async-Cancel Safety has been added.
844 * Change of ABI data structures for s390 and s390x:
845 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
846 allow for future hardware extensions. All library functions that accept or
847 return these structures were versioned in order to provide backwards
848 compatibility with existing code. However, not all cases can be handled
849 with interface versioning. If an application embeds either structure into
850 another structure and that structure is passed to another compilation unit
851 which expects the newer larger-sized object then any access to the new
852 fields will result in undefined behaviour. Similarly any access to fields
853 that were moved by the enlarging of the structures will cause undefined
854 behaviour. To fix the undefined behaviour all objects that are part of the
855 final in-memory image must agree on the size of structures, and this may
856 require recompilation.
860 * The following bugs are resolved with this release:
862 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
863 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
864 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
865 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
866 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
867 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
868 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
869 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
870 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
871 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
872 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
873 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
874 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
877 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
878 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
879 Distributions can re-enable building and using pt_chown via the new configure
880 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
881 considerable security risks and should only be used if the distribution
882 understands and accepts the risks.
884 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
887 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
888 fixed (Bugzilla #15330).
890 * Add support for calling C++11 thread_local object destructors on thread
891 and program exit. This needs compiler support for offloading C++11
892 destructor calls to glibc.
894 * Improved worst case performance of libm functions with double inputs and
897 * Support for priority inherited mutexes in pthread condition variables on
898 non-x86 architectures.
900 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
902 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
904 * Optimized string functions for ARM. Implemented by Will Newton and
907 * Optimized libm functions for SPARC. Implemented by David S. Miller.
909 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
912 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
913 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
915 * Added a benchmark framework to track performance of functions in glibc.
917 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
918 It is based on draft TS 18661 and currently enabled as a GNU extension.
920 * On Linux, the clock function now uses the clock_gettime system call
921 for improved precision, rather than old times system call.
923 * Added support for version-3 tz format files. This is needed when using
924 the tz database release 2013e or later, and affects a few unusual cases --
925 currently only TZ='America/Godthab' for time stamps after 2037.
927 * Added new API functions pthread_getattr_default_np and
928 pthread_setattr_default_np to get and set the default pthread
929 attributes of a process.
931 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
932 This may improve lock scaling of existing programs on TSX capable systems.
933 When the --enable-lock-elision=yes parameter is specified at configure
934 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
937 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
938 availability). Implemented by Ryan S. Arnold.
940 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
944 * The following bugs are resolved with this release:
946 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
947 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
948 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
949 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
950 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
951 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
952 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
953 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
954 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
955 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
956 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
957 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
958 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
959 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
960 14879, 14889, 14893, 14898, 14914.
962 * Optimization of memcpy for MIPS.
964 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
965 EMFILE has been fixed (Bugzilla #14889).
967 * The add-on ports collection is now distributed in the "ports" subdirectory
968 of the main GNU C Library distribution, rather than separately.
970 * Port to ARM AArch64 contributed by Linaro.
972 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
973 Optimized versions of memcpy, memset, and memcmp added for System z10 and
975 Implemented by Andreas Krebbel.
977 * The new function secure_getenv allows secure access to the environment,
978 returning NULL if running in a SUID/SGID process. This function replaces
979 the internal function __secure_getenv.
981 * SystemTap static probes have been added into the dynamic linker.
982 Implemented by Gary Benson.
984 * Optimizations of string functions strstr, strcasestr and memmem.
985 Implemented by Maxim Kuvyrkov.
987 * The minimum Linux kernel version that this version of the GNU C Library
988 can be used with is 2.6.16.
990 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
991 powerpc POWER7. Implemented by Will Schmidt.
993 * New configure option --disable-nscd builds the C library such that it
994 never attempts to contact the Name Service Caching Daemon (nscd).
995 New configure option --disable-build-nscd avoids building nscd itself;
996 this is the default if --disable-nscd is used.
998 * Improved support for cross-compilation, including cross-testing and
999 bootstrap builds without a previously built glibc.
1001 * Several testsuite tests are now able to test multiple IFUNC variants of an
1002 interface, rather than just testing the one that would be chooen by
1005 * New configure options --with-bugurl and --with-pkgversion, for
1006 distributors to use to embed their bug-reporting and package version
1007 information in --help and --version output.
1009 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1010 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1011 allows creation of chroots without the procfs mounted on /proc.
1013 * The `crypt' function now fails if passed salt bytes that violate the
1014 specification for those values. On Linux, the `crypt' function will
1015 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1016 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1017 when the mode is enabled.
1019 * The `clock_*' suite of functions (declared in <time.h>) is now available
1020 directly in the main C library. Previously it was necessary to link with
1021 -lrt to use these functions. This change has the effect that a
1022 single-threaded program that uses a function such as `clock_gettime' (and
1023 is not linked with -lrt) will no longer implicitly load the pthreads
1024 library at runtime and so will not suffer the overheads associated with
1025 multi-thread support in other code such as the C++ runtime library.
1027 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1032 * The following bugs are resolved with this release:
1034 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1035 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1036 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1037 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1038 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1039 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1040 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1041 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1042 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1043 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1044 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1045 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1046 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1047 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1048 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1049 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1050 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1051 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1052 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1053 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1054 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1055 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1058 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1059 configuring glibc with:
1060 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1061 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1062 Implemented by H.J. Lu.
1066 + define static_assert
1068 + do not declare gets
1070 + declare at_quick_exit and quick_exit also for ISO C11
1072 + aligned_alloc. NB: The code is deliberately allows the size parameter
1073 to not be a multiple of the alignment. This is a moronic requirement
1074 in the standard but it is only a requirement on the caller, not the
1077 + timespec_get added
1079 + uchar.h support added
1081 + CMPLX, CMPLXF, CMPLXL added
1083 Implemented by Ulrich Drepper.
1085 * Support for the IA-64 has been moved to ports.
1087 * Remove support for anything but ELF binary format
1089 * Checking versions of poll, ppoll added.
1090 Implemented by Ulrich Drepper.
1092 * More generic and 64-bit performance optimizations to math functions.
1093 Implemented by Ulrich Drepper.
1095 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1096 headers and functions available at compile time as they were before
1097 version 2.14. This option will be removed at some time in the future
1098 after the TI-RPC library becomes fully sufficient for the needs of
1099 existing applications.
1101 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1102 Note that glibc is not expected to work with any Linux kernel version
1105 * New header <sys/auxv.h> and function getauxval allowing easy access to
1106 the AT_* key-value pairs passed from the Linux kernel. The header also
1107 defines the HWCAP_* bits associated with the AT_HWCAP key.
1109 * New locales: mag_IN
1111 * New configure option --enable-systemtap builds SystemTap static probes
1112 into libc for setjmp and longjmp and into libpthread for various operations.
1113 So far the setjmp/longjmp probes and some of the libpthread probes are
1114 provided only for i*86 and x86_64.
1115 Implemented by Roland McGrath and Rayson Ho.
1117 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1119 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1122 * More optimized functions for SPARC. Implemented by David S. Miller.
1124 * Improved support for cross-compilation, especially bootstrap builds
1125 without a previously built glibc.
1127 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1128 Chris Metcalf from Tilera.
1130 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1131 now supported for ARM processors.
1133 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1134 as the name of the dynamic linker, to distinguish it from the
1135 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1137 * Support for CRIS has been removed from ports.
1139 * A new class of installed header has been documented for low-level
1140 platform-specific functionality. PowerPC added the first instance with a
1141 function to provide time base register access. Contributed by Tulio
1142 Magno Quites Machado Filho.
1144 * ix86 configurations now install header files that are consistent with
1145 what x86-64 configurations install. These same header files can be used
1146 for -m32, -m64, or -mx32 builds.
1147 Contributed by H.J. Lu.
1149 * Math library bug fixes. A thorough audit of all open math library bugs was
1150 conducted by Joseph Myers. Significant progress was made on many math
1151 library bugs resulting in more accurate exceptions and function results.
1152 Many thanks to all those that contributed including Andreas Jaeger for his
1153 patch review and work on the x87 trigonometric instruction issues.
1155 * Timezone data is no longer installed. Timezone-related binaries and scripts
1156 will continue to be installed. Users should obtain their timezone data from
1157 their distribution provider or from the tzdata package at
1158 <ftp://munnari.oz.au/pub/>.
1162 * The following bugs are resolved with this release:
1164 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1165 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1166 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1167 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1168 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1169 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1170 13484, 13506, 13515, 13523, 13524, 13538, 13540
1172 * New program pldd to list loaded object of a process
1173 Implemented by Ulrich Drepper.
1175 * Add nss_db support back to glibc. No more dependency on Berkeley db
1176 and support for initgroups lookups.
1177 Implemented by Ulrich Drepper.
1179 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1180 Contributed by HJ Lu.
1182 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1183 Contributed by HJ Lu.
1185 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1186 on x86-32 and x86-64.
1187 Contributed by Liubov Dmitrieva.
1189 * Optimized strchr and strrchr for SSE on x86-32.
1190 Contributed by Liubov Dmitrieva.
1192 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1193 for x86-64 and x86-32.
1194 Contributed by Liubov Dmitrieva.
1196 * New interfaces: scandirat, scandirat64
1197 Implemented by Ulrich Drepper.
1199 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1200 Implemented by Ulrich Drepper.
1202 * nscd now also caches the netgroup database.
1203 Implemented by Ulrich Drepper.
1205 * Integrate libm with gcc's -ffinite-math-only option.
1206 Implemented by Ulrich Drepper.
1208 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1209 to math functions. Implemented by Ulrich Drepper.
1211 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1212 Implemented by Ulrich Drepper.
1214 * New Linux interfaces: process_vm_readv, process_vm_writev
1216 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1217 Implemented by Ulrich Drepper.
1219 * Optimized nearbyint and strcasecmp for PPC.
1220 Implemented by Adhemerval Zanella.
1222 * New locales: bho_IN, unm_US, es_CU, ta_LK
1226 * The following bugs are resolved with this release:
1228 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1229 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1230 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1231 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1232 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1233 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1234 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1235 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1236 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1237 12795, 12811, 12813, 12814, 12841
1239 * The RPC implementation in libc is obsoleted. Old programs keep working
1240 but new programs cannot be linked with the routines in libc anymore.
1241 Programs in need of RPC functionality must be linked against TI-RPC.
1242 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1244 Visible changes of this change include (obviously) the inability to link
1245 programs using RPC functions without referencing the TI-RPC library and the
1246 removal of the RPC headers from the glibc headers.
1247 Implemented by Ulrich Drepper.
1249 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1250 syncfs, setns, sendmmsg
1252 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1253 yue_HK, lij_IT, mhr_RU
1255 * New encodings: CP770, CP771, CP772, CP773, CP774
1257 * New program sotruss to trace calls through PLTs
1258 Implemented by Ulrich Drepper.
1260 * The malloc hook implementation is marked deprecated and will be removed
1261 from the default implementation in the next version. The design never
1262 worked ever since the introduction of threads. Even programs which do
1263 not create threads themselves can use multiple threads created internally.
1267 * The following bugs are resolved with this release:
1269 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1270 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1271 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1272 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1275 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1277 * POWER7 optimizations: memset, memcmp, strncmp
1279 * New optimized string functions for x86-64: strnlen (SSE2),
1280 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1281 Implemented by Ulrich Drepper.
1285 * The following bugs are resolved with this release:
1287 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1288 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1289 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1290 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1291 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1292 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1293 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1294 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1296 * New interfaces: pthread_getname_np, pthread_setname_np
1298 * New Linux interface: recvmmsg
1300 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1302 * The dynamic linker now recognizes supported ABI versions from the
1303 EI_ABIVERSION field in the ELF header.
1304 Implemented by Ulrich Drepper.
1306 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1307 will not be used to fill in password fields in the passwd.byname replies.
1308 Instead it is used to synthesize the shadow.byname table, should it be
1309 missing. This is a useful mode in some installations involving Solaris.
1310 Implemented by Ulrich Drepper.
1312 * New locales: kok_IN, sq_MK, cv_RU
1316 * The following bugs are resolved with this release:
1318 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1319 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1320 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1321 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1322 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1323 10789, 10817, 10823, 10840, 10847
1325 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1327 Implemented by Ulrich Drepper.
1329 * Checking version of longjmp added that fails if an uninitialized stack
1330 frame would be created. Implemented by Ulrich Drepper.
1332 * STT_GNU_IFUNC is now supported in static executables.
1333 Implemented by H.J. Lu.
1335 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1337 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1338 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1339 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1340 Contributed by H.J. Lu.
1342 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1343 Implemented by Ulrich Drepper.
1345 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1347 Contributed by H.J. Lu.
1349 * Support for fma instruction in AVX on x86-64.
1350 Implemented by H.J. Lu and Ulrich Drepper.
1352 * AVX support in x86-64 auditing support in ld.so.
1353 Implemented by H.J. Lu.
1355 * STB_GNU_UNIQUE support added.
1356 Implemented by Ulrich Drepper.
1358 * Implement second fallback mode for optimized DNS lookup for even more
1359 broken environments. If two requests from the same port are not
1360 handled correctly close the socket and open a new one before sending
1361 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1362 can be used to select this mode right away, instead of rediscovering the
1363 necessity is every process again.
1364 Implemented by Ulrich Drepper.
1366 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1367 Implemented by Adam Tkac.
1369 * Optimized iconv conversions for S390x.
1370 Implemented by Andreas Krebbel.
1372 * Using condvars with PI mutexes is now more efficient due to kernel
1373 support for requeueing to PI futexes. NPTL support added for x86-64.
1374 Implemented by Ulrich Drepper.
1376 * New locales: ps_AF, my_MM
1380 * The following bugs are resolved with this release:
1382 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1383 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1384 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1385 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1386 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1388 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1389 Implemented by Ulrich Drepper.
1391 * New Linux interfaces: accept4, fallocate, fallocate64.
1392 Implemented by Ulrich Drepper.
1394 * Correct declarations of string function when used in C++ code. This
1395 could lead to compile errors for invalid C++ code.
1397 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1400 * New POSIX 2008 interface: psiginfo
1401 Implemented by Ulrich Drepper.
1403 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1404 Implemented by Ulrich Drepper.
1406 * Support for selecting between multiple function definitions at runtime
1407 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1409 * The libcrypt library can now use the hash function implementations in
1410 NSS. Implemented by Ulrich Drepper.
1412 * The malloc implementation can be compiled to be less memory efficient
1413 but higher performing in multi-threaded programs.
1414 Implemented by Ulrich Drepper.
1416 * New locales: nan_TW@latin, ks_IN
1418 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1419 Implemented by Ulrich Drepper.
1421 * Extended printf hook support. It is possible to use user-defined types
1422 and extend existing format specifiers.
1423 Implemented by Ulrich Drepper.
1425 * Handling for group shadow files has been added.
1426 Implemented by Ulrich Drepper.
1428 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1429 servers (the case, e.g., for some people using the built-in DNS
1430 server in ADSL modems/routers). There is a once-per-process timeout
1431 in case of a broken server. To avoid it, users can run nscd or put
1432 'options single-request' in /etc/resolv.conf.
1433 Implemented by Ulrich Drepper.
1437 * The following bugs are resolved with this release:
1439 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1440 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1441 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1442 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1443 6968, 6974, 6980, 6995, 7008, 7009, 7029
1445 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1446 up at the same time. Implemented by Ulrich Drepper.
1448 * TLS descriptors for LD and GD on x86 and x86-64.
1449 Implemented by Alexandre Oliva.
1451 * getaddrinfo now handles DCCP and UDPlite.
1452 Implemented by Ulrich Drepper.
1454 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1455 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1456 Implemented by Ulrich Drepper.
1458 * New implementation of memmem, strstr, and strcasestr which is O(n).
1459 Implemented by Eric Blake.
1461 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1463 * Implement "e" option for popen to open file descriptor with the
1464 close-on-exec flag set. Implemented by Ulrich Drepper.
1466 * Implement "b" mode for fmemopen. In this mode writes writes don't
1467 implicitly add a NUL byte and seeks from the end of the buffer really
1468 use the buffer end, not the string length as the basis.
1469 Implemented by Ulrich Drepper.
1471 * Many functions, exported and internal, now atomically set the close-on-exec
1472 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1474 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1476 Implemented by Pravin Satpute.
1478 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1482 * The following bugs are resolved with this release:
1484 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1485 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1486 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1487 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1488 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1489 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1490 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1492 * New locales: bo_CN, bo_IN, shs_CA.
1494 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1496 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1497 Implemented by Pravin Satpute.
1499 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1501 * nscd caches now all timeouts for DNS entries
1502 Implemented by Ulrich Drepper.
1504 * nscd is more efficient and wakes up less often.
1505 Implemented by Ulrich Drepper.
1507 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1508 vdprintf, and obstack_vprintf.
1509 Implemented by Jakub Jelinek.
1511 * Faster memset for x86-64.
1512 Implemented by Harsha Jagasia and H.J. Lu.
1514 * Faster memcpy on x86.
1515 Implemented by Ulrich Drepper.
1517 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1518 Implemented by Ulrich Drepper.
1520 * Faster sqrt and sqrtf implemention for some PPC variants.
1521 Implemented by Steven Munroe.
1525 * The following bugs are resolved with this release:
1527 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1528 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1529 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1530 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1531 5071, 5103, 5104, 5112, 5113, 5184, 5186
1533 * More checking functions: fread, fread_unlocked, open*, mq_open.
1534 Implemented by Jakub Jelinek and Ulrich Drepper.
1536 * Extend fortification to C++. Implemented by Jakub Jelinek.
1538 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1539 by not recognizing 'a' as a modifier when those specs are requested.
1540 Implemented by Jakub Jelinek.
1542 * PPC optimizations to math and string functions.
1543 Implemented by Steven Munroe.
1545 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1546 options to be passed. Implemented by Ulrich Drepper.
1548 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1550 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1551 Implemented by Ulrich Drepper.
1553 * Handle private futexes in the NPTL implementation.
1554 Implemented by Jakub Jelinek and Ulrich Drepper.
1556 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1557 Implemented by Roland McGrath and Ulrich Drepper.
1559 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1561 * SHA-256 and SHA-512 based password encryption.
1562 Implemented by Ulrich Drepper.
1564 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1565 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1568 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1569 Implemented by Ulrich Drepper.
1573 * The following bugs are resolved with this release:
1575 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1576 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1577 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1578 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1579 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1580 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1581 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1584 * New Linux interfaces: epoll_pwait, sched_getcpu.
1586 * New generic interfaces: strerror_l.
1588 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1592 * The following bugs are resolved with this release:
1594 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1595 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1596 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1597 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1598 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1599 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1600 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1601 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1602 3225, 3251, 3252, 3253, 3273
1604 * For Linux, the sorting of addresses returned by getaddrinfo now also
1605 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1606 Implemented by Ulrich Drepper.
1608 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1609 Implemented by Ulrich Drepper.
1611 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1613 * New iconv module for MIK. Contributed by Alexander Shopov.
1615 * For sites with broken group and/or passwd database, the auto-propagate
1616 option of nscd can prevent creating ID lookup entries from the results
1617 of a name lookup and vice versa. This usually is no problem but some
1618 site might have problems with the default behavior.
1619 Implemented by Ulrich Drepper.
1621 * Iterating over entire database in NIS can be slow. With the
1622 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1623 to trade time for memory. The entire database will be read at once.
1624 Implemented by Ulrich Drepper.
1626 * The interfaces introduced in RFC 3542 have been implemented by
1629 * Support for the new ELF hash table format was added by Ulrich Drepper.
1631 * Support for priority inheritance mutexes added by Jakub Jelinek and
1634 * Support for priority protected mutexes added by Jakub Jelinek.
1636 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1637 or_IN, csb_PL, fy_NL, sr_ME.
1641 * More overflow detection functions.
1643 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1644 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1646 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1647 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1648 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1649 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1650 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1651 by Masahide Washizawa.
1653 * It is now possible to install audit libraries for the dynamic linker using
1654 LD_AUDIT. Implemented by Ulrich Drepper.
1656 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1657 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1658 For a libc and libpthread that works well on Linux 2.4 kernels, we
1659 recommend using the stable 2.3 branch.
1661 * The new function open_wmemstream acts like open_memstream,
1662 but uses a wchar_t wide character buffer.
1664 * The new function ppoll is an improved version of poll, similar to pselect.
1666 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1667 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1668 renameat, unlinkat, linkat, symlinkat, readlinkat.
1670 * New Linux kernel system calls: unshare,
1671 inotify_init, inotify_add_watch, inotify_rm_watch.
1673 * The euidaccess function is now also known by the alias eaccess,
1674 for compatibility with some other systems.
1676 * Timezone data updated to 2006b version.
1680 * The following bugs are resolved with this release:
1682 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1683 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1684 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1685 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1686 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1687 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1689 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1691 * As of this release, GCC 4 can be used to compile the C Library.
1693 * Timezone data updated to 2005m version.
1697 * The following bugs are resolved with this release:
1699 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1700 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1701 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1702 777, 787, 821, 822, 823, 825
1704 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1708 * Support for RFC 3678. Real implementations exist only for Linux so far.
1709 Implemented by Ulrich Drepper.
1711 * nscd can now cache entries persistently. Expiring entries are reloaded.
1712 For speedups the cache can be shared in memory with client processes.
1713 Implemented by Ulrich Drepper.
1715 * nscd can now perform SELinux checks.
1716 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1718 * getaddrinfo queries are now cached. Canonical name lookup is performed
1720 Implemented by Ulrich Drepper.
1722 * The nothrow function attribute is used when headers are used by gcc when
1723 compiling C code. This can avoid significant amounts of exception
1726 * The malloc functions perform more error checking and are stricter when
1727 it comes to reacting on errors. The default action is to terminate
1728 the process after showing an error message. Implemented by Ulrich Drepper.
1730 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1731 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1733 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1734 namespaces using the new function dlmopen(). This feature is of course,
1735 like most other dynamic loading functionality, not available in statically
1736 linked applications. Implemented by Ulrich Drepper.
1738 * Low-overhead boundary checking variants of string and some stdio functions
1739 were added. These are to be used in conjunction with a gcc patch by
1740 Jakub Jelinek which adds calls to these functions if possible.
1741 Implemented by Jakub Jelinek and Ulrich Drepper.
1743 * Old code for several operating systems and machine architectures that
1744 have not been in working condition in a long time have been removed from
1745 the main source tree maintained by the GNU C Library's maintainers.
1746 These files are now reside in the separate `ports' source module
1747 that is usable as an add-on when building the library.
1751 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1752 interrogate the dynamic linker, compatible with the Solaris interface.
1754 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1755 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1757 * getifaddrs now uses the netlink interface on Linux to get its information.
1758 Implemented by Thorsten Kukuk.
1760 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1761 Implemented by Ulrich Drepper.
1763 * support for non-executable stacks on x86 has been added. Changes mostly
1766 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1769 * getaddrinfo now performs destination address selection according to
1774 * Thread-safe interfaces for many functions that access locale data
1775 were added in version 2.3, but these features were omitted from NEWS.
1776 Many functions have variants with an `_l' suffix that take a `locale_t'
1777 object as a parameter rather than consulting the current locale.
1778 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1779 create and maintain `locale_t' objects. Additionally, the new function
1780 `uselocale' sets "the current locale" (as used by functions not so
1781 parameterized) set for an individual thread. These features were added
1782 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1784 * The functions getresuid, getresgid, setresuid, and setresgid, which
1785 have long been available on Linux, are now declared in <unistd.h>
1786 and are now also available on the Hurd.
1788 * ELF thread-local storage support (TLS) now works on x86-64.
1790 * The new dynamic string token $LIB is expanded in shared library names.
1791 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1793 * Aldy Hernandez contributed complete software floating point support for
1794 PowerPC machines with no FPU.
1796 * fexecve is implemented on Linux.
1798 * The `btowc' function should work at least twice as fast due to
1799 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1801 * With approriate thread add-ons cancelable functions are now implemented
1802 in libc.so as well. No need to call the function in libpthread. This
1803 change allowed to finally disable the incorrect and expensive handling
1804 of weak definition in ld.so.
1806 * Yet more PLT entries in libc.so have been removed. We finally arrived
1807 at the bare minimum. Startup times improved appropriately.
1809 * Support for the new Linux/x86 system call interface was added. The
1810 AT_SYSINFO auxiliary vector entry is recognized and handled.
1814 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1817 * iconv (the program and the interface) now accepts empty names (excluding
1818 options like //TRANSLIT) to mean "use charset of current locale".
1820 * localedef can now transliterate characters in strings which are not in
1821 the provided charmap. The information from the input locale is used.
1823 * Prelinking support was added for ELF targets. This requires additional
1824 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1826 * Read-only stdio streams now use mmap to speed up operation by eliminating
1827 copying and buffer underflows. To use add 'm' to the mode string of
1828 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1830 * The malloc functions were completely rewritten by Wolfram Gloger based
1831 on Doug Lea's malloc-2.7.0.c.
1833 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1834 implementation of regex.
1836 * Bruno Haible upgraded the iconv and locale implementation to support
1839 * Contents of the LC_* and LANG environment variables in the CEN style are
1840 not recognized anymore. It never was used. Change by Ulrich Drepper.
1842 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1843 thread-local storage (TLS) ABI on some platforms.
1844 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1846 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1847 EUC-JISX0213, and TSCII.
1849 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1850 BSD-compatible interface for getting all network interface addresses.
1851 Implementation for IPv4 by Roland McGrath.
1853 * Loading of locale data is faster due to the introduction of a locale
1854 archive. Implemented by Roland McGrath and Ulrich Drepper.
1856 * Startup times are significantly reduced by not using exported functions
1857 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1860 * Steven Munroe contributed a port to PowerPC64/Linux.
1864 * The Hurd now uses the GNU libio implementation of stdio rather than the
1865 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1867 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1868 with the same behavior as the Linux system call of the same name.
1872 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1873 128-bit long double format.
1875 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1876 IBM1161, and IBM1162 charsets.
1878 * Andreas Jaeger contributed a port to x86-64/Linux.
1880 * Peter Bruin contributed a port to PowerPC/Hurd.
1882 * libc functions using I/O streams now can handle wide-oriented streams
1885 * optimizations in the dynamic linker. Binaries created by recent binutils
1886 versions start up quicker due to reduced time spent on relocations.
1888 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1892 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1893 asinh, atanh, j0 for the 128-bit long double format.
1895 * Bruno Haible updated all the code handling Unicode in some form to
1896 support Unicode 3.1.
1898 * Speed of regex for single-byte locales is back to previous levels.
1899 Patch by Isamu Hasegawa.
1901 * Alpha, SPARC, and IA-64 now also using floating stacks.
1903 * Startup time of internationalized applications greatly improved through
1904 iconv cache. Use iconvconfig to generate the cache file.
1905 Contributed by Ulrich Drepper.
1907 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1908 severe performance problems. Patch by David Mosberger.
1910 * The Hurd port got a lot more functionality like AIO, various stdio
1911 extensions, etc. Mainly done by Roland McGrath.
1913 * mtrace can now lookup symbols in shared libraries.
1917 * Intel's IA-64 math library is largely integrated. It provides fast and
1918 accurate implementatations for most basic and standard math functions
1919 in float, double, and long double format.
1921 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1922 and asin for the 96-bit long double format and asin, log, tan for the
1923 128-bit long double format.
1925 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1926 The basic double functions exist today. Contributed by Abraham Ziv
1927 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1928 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1930 * An asynchronous name lookup library was added. The interface is designed
1931 after POSIX AIO. The proposal was circulated beforehand to get comments.
1932 No negative ones came in. Implemented by Ulrich Drepper.
1934 * Port to S390/64bit contributed by Martin Schwidefsky
1935 <schwidefsky@de.ibm.com>.
1937 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1938 of functions for Linux/IA-64.
1940 * The RPC code is now thread safe. Threads can now use the same service
1941 of different services at the same time. Patch by Eric Norum
1942 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1944 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1945 family of functions for Linux/S390.
1947 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1948 of functions for Linux/x86.
1950 * Port to Linux/CRIS contributed by Axis Communications.
1954 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1955 we can now check for namespace violations and missing declarations. The
1956 result is that almost all headers are now Unix-compliant (as defined in
1957 the upcoming XPG6). The negative side is that some programs might need
1958 corrections, too, if they depend on the incorrect form of the headers in
1959 previous versions which defined too many symbols and included too many
1962 * regex now handles multibyte character sets correctly.
1963 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1965 * iconv (the program) does now conform to the upcoming XPG6 and handles
1966 charmaps. Instead of the charset names the path of charmaps can be
1967 provided and the conversion happens based on this data.
1968 Contributed by Ulrich Drepper.
1970 * The locale program now provides detailed information about the installed
1975 only lists the names of the supported locales
1979 provides details such as country, language, and codeset name.
1980 Contributed by Ulrich Drepper.
1984 * The gencat program now parses the input file according to the charset
1985 selected by the LC_CTYPE category. This is important for stateful
1986 character sets. To make generating catalogs easier there is a way
1987 to overwrite the charset selected by the locale: before the first
1988 message or $ quote line the catalog can contain a line like
1990 $ codeset=ISO-8859-2
1992 to select the charset (ISO-8859-2 in this case).
1994 Implemented by Shinya Hanataka and Ulrich Drepper.
1996 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1997 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1998 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2000 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2001 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2003 * The LANGUAGE environment variable is now ignored unless the locale is
2004 changed from the default "C" locale.
2006 * The usual bug fixes.
2010 * Greg McGary added runtime support for bounds checking using gcc's
2011 new -fbounded-pointers option. ix86 target is complete. PowerPC
2014 * Thorsten Kukuk added secure mode support to nscd.
2016 * The Berkeley db libraries have been removed.
2018 Related, the nss_db module is now in a separate package since it
2019 obviously requires a database library being available.
2021 * Wide character I/O streams implemented by Ulrich Drepper.
2023 * Functions from the extended socket API added by Ulrich Drepper.
2025 * Functions feenableexcept and fedisableexcept to control the
2026 behaviour of individual exceptions have been added by Andreas Jaeger.
2028 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2030 * The resolver code has been updated from bind 8.2.3-T5B which supports
2031 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2034 This change could in some situations effect backward compatibility. Since
2035 now `_res' is a thread-local instead of a global variable, modifying it
2036 in one thread does not have any effect in other threads.
2038 The resolver library was also extended to allow IPv6 as the transport
2039 protocol for the requests. This work was done by Stig Venaas.
2041 * Compatibility code for K&R C compilers has been removed from the
2042 header files. A ISO C compiler is needed to use the library
2043 (conforming to either C89 or C99 standard).
2045 * Complete rewrite of the localedef program to support multibyte character
2046 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2047 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2048 Implemented by Ulrich Drepper.
2050 Bruno Haible significantly improved the generation and use of the data
2051 structures for the wide character tables.
2053 * Plural handling in gettext implemented by Ulrich Drepper.
2055 * The utmp daemon has been removed.
2057 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2059 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2062 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2064 * POSIX barriers implemented by Kaz Kylheku.
2066 * POSIX spawn function family implemented by Ulrich Drepper.
2068 * POSIX spinlocks are now available.
2070 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2072 * the configure option --enable-kernel=X.Y.Z allows to strip out
2073 compatibility for kernel versions before X.Y.Z. This is currently only
2074 implemented for Linux.
2076 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2077 field sin6_scope_id. This means that all programs using IPv6 should be
2078 recompiled. Don't expect binary compatibility with previous glibc
2081 * various conversion modules for IBM character sets contributed by
2084 * IA-64 port by Jes Sorensen and HJ Lu.
2098 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2100 * New xdr functions are added; some rpc functions are now 64bit clean.
2102 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2104 * Fixed known incompatibilities with glibc 2.0.
2106 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2108 * Optimized a number of functions (especially the ELF dynamic loader).
2110 * Update timezone data files.
2112 * lots of charmaps corrections
2114 * some new locale definitions and charmaps
2119 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2120 conform to POSIX member type requirements. Symbol versions have been
2121 adjusted as needed within the library, and for direct use by applications,
2122 but there is potential for problems if third-party libraries use
2123 struct timeval as part of their interface. This does not present
2124 a problem for X and other "essential" system libraries.
2126 * An additional locale model to support C++ Standard Library locale
2127 model and probably more was implemented by Ulrich Drepper.
2129 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2132 * Miles Bader provided the `argp' function family to support hierachical
2133 command line argument parsing, layered on top of getopt.
2135 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2137 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2140 * scanf recognizes the %a and %A format for scanning floating point numbers.
2142 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2143 information and interfaces for the available integer types.
2145 * about 130 new math functions were added to implement the ISO C9x math
2148 * the new header <complex.h> contains definitions of the complex math
2149 functions from ISO C 9X.
2151 * the new header <tgmath.h> defines generic macros to use complex or
2152 real valued functions.
2154 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2156 * Andreas Jaeger provided a test suite for the math library.
2158 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2160 * Ulrich Drepper added character set conversion functions (iconv).
2162 * Optimized string functions have been added.
2164 * The localedata addon is now part of glibc.
2166 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2168 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2169 daemon for NSS (nscd).
2171 Missing a better place here are some numbers on improvements. Under
2172 Linux 2.1.125 un-tar-ing the kernel sources takes
2176 using local files 12.19s 6.88s 22.91s
2178 using NIS 13.92s 8.91s 26.34s
2180 using NIS & nscd 10.37s 7.34s 25.30s
2182 using NIS+ 27.57s 30.37s 640.46s
2184 using NIS+ & nscd 10.25s 7.83s 26.51s
2186 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2188 Keep in mind that non-namelookup related operations dominate above times.
2189 It was just a common complain that using NIS+ unpacking the kernel is
2192 [1] The old nscd implementation is not available anymore since it was
2193 distributed with glibc up to version 2.0.98 and thus is now replaced.
2195 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2197 * Mark Kettenis provided a Hesiod NSS module.
2199 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2200 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2202 * rcmd can now handle netgroups (Dick Streefland).
2204 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2207 * Support for the IPv6 protocol has been added to the socket API, as per the
2208 latest draft standards.
2210 * Support for Linux 2.2 has been added.
2212 * Interface changes relative to the latest 2.0.x release:
2213 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2214 addseverity NEW: Unix98
2215 alphasort64 NEW: LFS
2216 argp_err_exit_status NEW: argp, GNU ext
2217 argp_error NEW: argp, GNU ext
2218 argp_failure NEW: argp, GNU ext
2219 argp_help NEW: argp, GNU ext
2220 argp_parse NEW: argp, GNU ext
2221 argp_program_bug_address NEW: argp, GNU ext
2222 argp_program_version NEW: argp, GNU ext
2223 argp_program_version_hook NEW: argp, GNU ext
2224 argp_state_help NEW: argp, GNU ext
2225 argp_usage NEW: argp, GNU ext
2226 authdes_create NEW: Secure RPC
2227 authdes_getucred NEW: Secure RPC
2228 authdes_pk_create NEW: Secure RPC
2229 backtrace NEW: GNU ext.
2230 backtrace_symbols NEW: GNU ext.
2231 backtrace_symbols_fd NEW: GNU ext.
2233 cacosf NEW: ISO C 9x
2234 cacosh NEW: ISO C 9x
2235 cacoshf NEW: ISO C 9x
2236 cacoshl NEW: ISO C 9x
2237 cacosl NEW: ISO C 9x
2244 casinf NEW: ISO C 9x
2245 casinh NEW: ISO C 9x
2246 casinhf NEW: ISO C 9x
2247 casinhl NEW: ISO C 9x
2248 casinl NEW: ISO C 9x
2250 catanf NEW: ISO C 9x
2251 catanh NEW: ISO C 9x
2252 catanhf NEW: ISO C 9x
2253 catanhl NEW: ISO C 9x
2254 catanl NEW: ISO C 9x
2255 cbc_crypt NEW: Secure RPC
2259 ccoshf NEW: ISO C 9x
2260 ccoshl NEW: ISO C 9x
2266 cimagf NEW: ISO C 9x
2267 cimagl NEW: ISO C 9x
2268 clearerr_locked REMOVED
2269 clntunix_create NEW: sunrpc ext
2271 clog10 NEW: ISO C 9x
2272 clog10f NEW: ISO C 9x
2273 clog10l NEW: ISO C 9x
2283 cprojf NEW: ISO C 9x
2284 cprojl NEW: ISO C 9x
2286 crealf NEW: ISO C 9x
2287 creall NEW: ISO C 9x
2292 csinhf NEW: ISO C 9x
2293 csinhl NEW: ISO C 9x
2296 csqrtf NEW: ISO C 9x
2297 csqrtl NEW: ISO C 9x
2301 ctanhf NEW: ISO C 9x
2302 ctanhl NEW: ISO C 9x
2304 des_setparity NEW: Secure RPC
2305 ecb_crypt NEW: Secure RPC
2306 endutxent NEW: Unix98
2308 exp10f NEW: ISO C 9x
2309 exp10l NEW: ISO C 9x
2313 fattach NEW: STREAMS
2314 fdetach NEW: STREAMS
2318 feclearexcept NEW: ISO C 9x
2319 fegetenv NEW: ISO C 9x
2320 fegetexceptflag NEW: ISO C 9x
2321 fegetround NEW: ISO C 9x
2322 feholdexcept NEW: ISO C 9x
2324 feraiseexcept NEW: ISO C 9x
2325 ferror_locked REMOVED
2326 fesetenv NEW: ISO C 9x
2327 fesetexceptflag NEW: ISO C 9x
2328 fesetround NEW: ISO C 9x
2329 fetestexcept NEW: ISO C 9x
2330 feupdateenv NEW: ISO C 9x
2331 fflush_locked REMOVED
2335 fgets_unlocked NEW: GNU ext.
2336 fileno_locked REMOVED
2348 fputc_locked REMOVED
2349 fputs_unlocked NEW: GNU ext.
2350 fread_unlocked NEW: GNU ext.
2355 fstatvfs NEW: Unix98
2359 ftruncate64 NEW: LFS
2361 fwrite_unlocked NEW: GNU ext.
2362 gai_strerror NEW: IPv6
2366 getchar_locked REMOVED
2368 getdate_err NEW: Unix98
2369 getdate_r NEW: GNU ext.
2371 getnameinfo NEW: IPv6
2372 getnetname NEW: Secure RPC
2373 getpmsg NEW: STREAMS
2374 getpt NEW: Unix98 PTY
2375 getrlimit64 NEW: LFS
2376 getutxent NEW: Unix98
2377 getutxid NEW: Unix98
2378 getutxline NEW: Unix98
2379 glob64 NEW: GNU ext.
2380 globfree64 NEW: GNU ext.
2381 gnu_get_libc_release NEW: GNU ext.
2382 gnu_get_libc_version NEW: GNU ext.
2383 grantpt NEW: Unix98 PTY
2384 host2netname NEW: Secure RPC
2386 iconv_close NEW: iconv
2387 iconv_open NEW: iconv
2388 if_freenameindex NEW: IPv6
2389 if_indextoname NEW: IPv6
2390 if_nameindex NEW: IPv6
2391 if_nametoindex NEW: IPv6
2392 in6addr_any NEW: IPv6
2393 in6addr_loopback NEW: IPv6
2394 inet6_isipv4mapped NEW: IPv6
2395 isastream NEW: STREAMS
2396 iswblank NEW: GNU ext.
2397 key_decryptsession NEW: Secure RPC
2398 key_decryptsession_pk NEW: Secure RPC
2399 key_encryptsession NEW: Secure RPC
2400 key_encryptsession_pk NEW: Secure RPC
2401 key_gendes NEW: Secure RPC
2402 key_get_conv NEW: Secure RPC
2403 key_secretkey_is_set NEW: Secure RPC
2404 key_setnet NEW: Secure RPC
2405 key_setsecret NEW: Secure RPC
2406 llrint NEW: ISO C 9x
2407 llrintf NEW: ISO C 9x
2408 llrintl NEW: ISO C 9x
2409 llround NEW: ISO C 9x
2410 llroundf NEW: ISO C 9x
2411 llroundl NEW: ISO C 9x
2416 lrintf NEW: ISO C 9x
2417 lrintl NEW: ISO C 9x
2418 lround NEW: ISO C 9x
2419 lroundf NEW: ISO C 9x
2420 lroundl NEW: ISO C 9x
2422 makecontext NEW: Unix98
2423 mempcpy NEW: GNU ext.
2426 modify_ldt NEW: kernel
2430 nearbyint NEW: ISO C 9x
2431 nearbyintf NEW: ISO C 9x
2432 nearbyintl NEW: ISO C 9x
2433 netname2host NEW: Secure RPC
2434 netname2user NEW: Secure RPC
2435 nexttoward NEW: ISO C 9x
2436 nexttowardf NEW: ISO C 9x
2437 nexttowardl NEW: ISO C 9x
2441 passwd2des NEW: Secure RPC
2443 pow10f NEW: GNU ext.
2444 pow10l NEW: GNU ext.
2447 printf_size NEW: GNU ext.
2448 printf_size_info NEW: GNU ext.
2449 profil_counter REMOVED
2450 pthread_mutexattr_getkind_np REPLACED
2451 pthread_mutexattr_setkind_np REPLACED
2452 ptsname NEW: Unix98 PTY
2453 ptsname_r NEW: Unix98 PTY
2455 putchar_locked REMOVED
2456 putgrent NEW: GNU ext.
2458 putpmsg NEW: STREAMS
2459 pututxline NEW: Unix98
2463 readdir64_r NEW: LFS
2464 remquo NEW: ISO C 9x
2465 remquof NEW: ISO C 9x
2466 remquol NEW: ISO C 9x
2468 roundf NEW: ISO C 9x
2469 roundl NEW: ISO C 9x
2471 scalbln NEW: ISO C 9x
2472 scalblnf NEW: ISO C 9x
2473 scalblnl NEW: ISO C 9x
2475 sendfile NEW: kernel
2476 setcontext NEW: Unix98
2477 setrlimit64 NEW: LFS
2478 setutxent NEW: Unix98
2480 sigignore NEW: Unix98
2481 sigqueue NEW: POSIX.1b
2482 sigrelse NEW: Unix98
2483 sigset NEW: POSIX.1b
2484 sigtimedwait NEW: POSIX.1b
2485 sigwaitinfo NEW: POSIX.1b
2486 sincos NEW: GNU ext.
2487 sincosf NEW: GNU ext.
2488 sincosl NEW: GNU ext.
2492 strcasestr NEW: GNU ext.
2493 strtoimax NEW: ISO C 9x
2494 strtoumax NEW: ISO C 9x
2495 strverscmp NEW: GNU ext.
2496 svcauthdes_stats NEW: Secure RPC
2497 svcunix_create NEW: sunrpc etx
2498 svcunixfd_create NEW: sunrpc ext
2499 swapcontext NEW: Unix98
2500 tcgetsid NEW: Unix98 PTY
2501 tdestroy NEW: GNU ext.
2502 tgamma NEW: ISO C 9x
2503 tgammaf NEW: ISO C 9x
2504 tgammal NEW: ISO C 9x
2508 truncf NEW: ISO C 9x
2509 truncl NEW: ISO C 9x
2511 unlockpt NEW: Unix98 PTY
2512 updwtmpx NEW: Unix98
2513 user2netname NEW: Secure RPC
2514 utmpxname NEW: Unix98
2515 versionsort NEW: GNU ext.
2516 versionsort64 NEW: GNU ext.
2518 wcscasecmp NEW: GNU ext.
2519 wcsncasecmp NEW: GNU ext.
2520 wcsnlen NEW: GNU ext.
2521 wcstoimax NEW: ISO C 9x
2522 wcstoll NEW: ISO C 9x
2523 wcstoull NEW: ISO C 9x
2524 wcstoumax NEW: ISO C 9x
2526 wordexp NEW: POSIX.2
2527 wordfree NEW: POSIX.2
2528 write_profiling REMOVED
2529 xdecrypt NEW: Secure RPC
2530 xdr_authdes_cred NEW: Secure RPC
2531 xdr_authdes_verf NEW: Secure RPC
2532 xdr_cryptkeyarg NEW: Secure RPC
2533 xdr_cryptkeyarg2 NEW: Secure RPC
2534 xdr_cryptkeyres NEW: Secure RPC
2535 xdr_getcredres NEW: Secure RPC
2536 xdr_key_netstarg NEW: Secure RPC
2537 xdr_key_netstres NEW: Secure RPC
2538 xdr_keybuf NEW: Secure RPC
2539 xdr_keystatus NEW: Secure RPC
2540 xdr_netnamestr NEW: Secure RPC
2541 xdr_sizeof NEW: Secure RPC
2542 xdr_unixcred NEW: sunrpc ext
2543 xencrypt NEW: Secure RPC
2544 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2555 * inet_ntoa is thread-safe
2557 * updwtmp is moved from libutil to libc
2559 * rewrite of cbrt function
2561 * update of timezone data
2575 * add atoll function
2577 * fix complex problems in Berkeley DB code
2579 * fix math functions
2583 * fixed lots of header problems (especially Linux/GNU specific)
2585 * dynamic loader preserves all registers
2587 * Roland McGrath provided support for handling of auxiliary objects in
2588 the ELF dynamic loader.
2590 * support for parallel builds is improved
2594 * GNU extensions are no longer declared by default. To enable them you
2595 must define the macro `_GNU_SOURCE' in your program or compile with
2598 * The library has changed from using GNU ld symbol aliases to using weak
2599 symbols where available. The ELF object file format supports weak
2600 symbols; GNU ld also supports weak symbols in the a.out format. (There
2601 is also now support for other GNU ld extensions in ELF. Use the
2602 `--with-elf' option to configure to indicate you have ELF, and
2603 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2604 of many files which contained only symbol aliases, reducing the size of
2605 the source and the compiled library; many other files were renamed to
2606 less cryptic names previously occupied by the symbol alias files.
2607 There is a new header file <elf.h> for programs which operate on
2608 files in the ELF format.
2610 * Converted to Autoconf version 2, so `configure' has more options.
2611 Run `configure --help' to see the details.
2613 * The library can now be configured to build profiling, highly-optimized
2614 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2615 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2616 `configure' enable building these extra libraries. The shared library is
2617 built by default when using both ELF and GNU ld. When shared libraries
2618 are enabled, the new library `-ldl' is available for arbitrary run-time
2619 loading of shared objects; its interface is defined in <dlfcn.h>. The
2620 new header file <link.h> gives access to the internals of the run-time
2621 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2622 application of same name on other systems and it provides information
2623 about dynamically linked binaries.
2625 * The C library now provides the run-time support code for profiling
2626 executables compiled with `-pg'. Programs can control the profiling code
2627 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2628 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2629 the support for this file format was contributed by David Mosberger-Tang.
2631 * The math code has been replaced with a math library based on fdlibm from
2632 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2633 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2634 functions. The math functions now reside in a separate library, so
2635 programs using them will need to use `-lm' their linking commands.
2637 * John C. Bowman contributed optimized ix87 assembler inline functions.
2639 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2640 mechanism similar to that found in Solaris 2. This is now used for the
2641 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2642 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2643 file controls what services are used for each individual database. This
2644 works by loading shared libraries with names specified in `nsswitch.conf',
2645 so service modules can be changed or added at any time without even
2646 relinking any program. Currently there are the file, db, and NIS based
2647 NSS services available.
2649 * The new functions `strtoq' and `strtouq' parse integer values from
2650 strings, like `strtol' and `strtoul', but they return `long long int' and
2651 `unsigned long long int' values, respectively (64-bit quantities).
2653 * The new functions `strtof' and `strtold' parse floating-point values from
2654 strings, like `strtod', but they return `float' and `long double' values,
2655 respectively (on some machines `double' and `long double' are the same).
2657 * Ulrich Drepper has contributed new implementations of the floating-point
2658 printing and reading code used in the `printf' family of functions and
2659 `strtod', `strtof', and `strtold'. These new functions are perfectly
2660 accurate, and much faster than the old ones.
2662 * The implementation of the POSIX locale model was completely rewritten by
2663 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2664 to compile the POSIX locale definition.
2666 * The former dummy implementations of the strcoll and strxfrm function are
2667 now replaced by fully functional code contributed by Ulrich Drepper. The
2668 collation information comes from the POSIX locale definitions.
2670 * The new header <langinfo.h> defines an interface for accessing
2671 various locale-dependent data (using the locale chosen with `setlocale').
2673 * Ulrich Drepper has contributed a new suite of functions for operation on
2674 wide-character and multibyte-character strings, in <wchar.h>;
2675 and classification and case conversion of wide characters, in <wctype.h>.
2676 These new functions are conforming to the ISO C, Amendement 1 specification.
2678 * There is now a second implementation of the standard I/O library available.
2679 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2680 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2682 * You can now use positional parameter specifications in format strings
2683 for the `printf' and `scanf' families of functions. For example,
2684 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2685 ``Number 6, Mr Jones''. This is mainly useful when providing different
2686 format strings for different languages, whose grammars may dictate
2687 different orderings of the values being printed. To support this
2688 feature, the interface for `register_printf_handler' has changed; see
2689 the header file <printf.h> for details.
2691 * The `printf' and `scanf' families of functions now understand a new
2692 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2693 to group numbers as indicated by the locale; for `scanf' and friends, this
2694 says to accept as valid only a number with all the proper grouping
2695 separators in the right places. In the default "C" locale, numbers are
2696 not grouped; but locales for specific countries will define the usual
2697 conventions (i.e. separate thousands with `,' in the US locale).
2699 * The pgrp functions have been regularized, slightly incompatibly but much
2700 less confusingly. The core functions are now `getpgid' and `setpgid',
2701 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2702 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2703 provided for compatibility. There is no longer an incompatible `getpgrp'
2704 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2706 * The new header file <fts.h> and suite of functions simplify programs that
2707 operate on directory trees. This code comes from 4.4 BSD.
2709 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2710 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2711 NSS scheme used in glibc.
2713 * There is a new malloc debugging hook `__memalign_hook'.
2715 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2716 `unsigned int' in <sys/types.h>. These are for compatibility only and
2717 their use is discouraged.
2719 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2720 done differently, so that it works even without GNU ld.
2722 * New function `euidaccess' checks allowed access to a file like `access',
2723 but using the effective IDs instead of the real IDs.
2725 * The time zone data files have been updated for the latest and greatest
2726 local time conventions of the countries of the world.
2728 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2731 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2732 for formatting floating-point numbers. They are provided only for
2733 compatibility; new programs should use `sprintf' instead. There are
2734 also equivalent function for the `long double' floating-point type and
2735 all functions also exist in a reentrant form.
2737 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2738 functions for maintaining the login-record files (primarily of use to
2739 system programs such as `login'), and convenient functions for
2740 allocating and initializing a pseudo-terminal (pty) device.
2742 * Ulrich Drepper has contributed new support for System V style
2743 shared memory and IPC on systems that support it.
2745 * Ulrich Drepper has contributed several miscellaneous new functions found
2746 in System V: The `hsearch' family of functions provide an effective
2747 implementation of hash tables; `a64l' and `l64a' provide a very simple
2748 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2751 * Ulrich Drepper has contributed new reentrant counterparts for the
2752 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2754 * Ulrich Drepper has contributed new, highly-optimized versions of several
2755 string functions for the i486/Pentium family of processors.
2757 * Ulrich Drepper has updated the Linux-specific code, based largely
2758 on work done in Hongjiu Lu's version of GNU libc for Linux.
2759 The GNU library now supports Linux versions 2.0.10 and later,
2760 using the ELF object file format (i[3456]86-*-linux).
2762 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2764 * David Mosberger-Tang and Richard Henderson have ported the C library
2765 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2766 dynamic linking support for ELF/Alpha.
2768 * Richard Henderson contributed several Alpha optimized assembler function
2769 for arithmetic and string handling.
2771 * Ulrich Drepper has contributed a new set of message catalog functions to
2772 support multiple languages using the <libintl.h> interface, for use with
2773 his new package GNU gettext. Translation volunteers have contributed
2774 catalogs of the library's messages in Spanish, German, and Korean.
2776 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2777 program and the `catgets' function for reading the catalog files it
2778 creates. (The <libintl.h> interface is preferred; we include the
2779 <nl_types.h> interface using `catgets' only for source compatibility with
2780 programs already written to use it.)
2782 * New header file <values.h> gives SVID-compatible names for <limits.h>
2785 * Various new macros, declarations, and small header files for compatibility
2788 * New function `group_member' is a convenient way to check if a process has
2789 a given effective group ID.
2791 * When using GCC 2.7 and later, the socket functions are now declared in a
2792 special way so that passing an argument of type `struct sockaddr_in *',
2793 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2794 `struct sockaddr *' type, does not generate a type-clash warning.
2796 * New function `error' declared in header file <error.h> is a convenient
2797 function for printing error messages and optionally exiting; this is the
2798 canonical function used in GNU programs. The new functions `err', `warn',
2799 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2800 doing the same thing.
2802 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2803 POSIX.2 `glob' function to do ~ and {...} expansion.
2805 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2806 `clearenv' which is used in POSIX.9 is also available.
2808 * New function `getsid' returns session ID number on systems that support it.
2810 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2811 files <db.h> and <mpool.h> provide a rich set of functions for several
2812 types of simple databases stored in memory and in files, and <ndbm.h> is
2813 an old `ndbm'-compatible interface using the `db' functions. Link with
2814 `-ldb' to get these functions.
2816 * New macro `strdupa' copies a string like `strdup', but uses local stack
2817 space from `alloca' instead of dynamic heap space from `malloc'.
2819 * New function `strnlen' is like `strlen' but searches only a given maximum
2820 number of characters for the null terminator. `stpncpy', `strndup' and
2821 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2824 * New function `statfs' in header <sys/statfs.h>.
2826 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2827 provide convenient functions for operating on blocks of null-terminated
2830 * A new suite of functions in <utmp.h> handle all the details of reading
2831 and writing the utmp file.
2833 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2836 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2837 completely POSIX compliant and also implemented the extended functionality
2838 to handle alternate digit representation and alternate era date formats.
2840 * Ulrich Drepper provided an implementation of the `strptime' function
2841 defined in XPG4.2 which transforms a string into a `struct tm' value.
2843 * Paul Eggert provided the tzselect shell script as part of the timezone
2844 code. The shell script makes it easy to select the correct timezone
2847 * The implementation of the malloc family of functions is completely replaced
2848 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2849 The implementation uses the mmap function (if available) and it is
2850 optimized for the use in multi threaded programs.
2852 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2853 functions. This new functionality is usable by specifying a special
2854 salt string and it is compatible with implementation on *BSD systems.
2856 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2857 `getsubopt' to handle second level command line options, `bsd_signal'
2858 to access BSD style `signal' functionality, the obsolete `regexp' style
2861 * the `lchown' function is available on system which support this
2864 * The implementation of the shadow password handling function was contributed
2867 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2869 * POSIX.1g support was added. The <sys/select.h> header is available,
2870 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2871 implementation of `getaddrinfo'.
2875 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2877 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2878 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2880 * The new function `daemon' from 4.4 BSD is useful for server programs that
2881 want to put themselves in the background.
2883 * Joel Sherrill has contributed support for several standalone boards that
2884 run without an operating system.
2886 * `printf', `scanf' and friends now accept a `q' type modifier for long
2887 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2889 * All of the code taken from BSD (notably most of the math and networking
2890 routines) has been updated from the BSD 4.4-Lite release.
2892 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2894 * The new functions `getdomainname' and `setdomainname' fetch or change the
2895 YP/NIS domain name. These are system calls which exist on systems which
2898 * The time zone data files have been updated for the latest international
2901 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2902 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2906 * The C library now includes support for Sun RPC, from Sun's free
2907 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2908 are included. (There is still no support for YP.)
2910 * Tom Quinn has contributed a port of the C library to SGI machines running
2911 Irix 4 (mips-sgi-irix4).
2913 * The new `lockf' function is a simplified interface to the locking
2914 facilities of `fcntl', included for compatibility.
2916 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2918 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2920 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2923 * The error message printed by `assert' for a failed assertion now includes
2924 the name of the program (if using GNU ld) and the name of the calling
2925 function (with versions of GCC that support this).
2927 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2929 * The library now includes the <sys/mman.h> header file and memory
2930 management functions `mmap', `munmap', `mprotect', `msync', and
2931 `madvise', on systems that support those facilities.
2933 * The interface for `mcheck' has changed slightly: the function called to
2934 abort the program when an allocation inconsistency is detected now takes
2935 an argument that indicates the type of failure. The new function
2936 `mprobe' lets you request a consistency check for a particular block at
2937 any time (checks are normally done only when you call `free' or `realloc'
2940 * It is now possible to easily cross-compile the C library, building on one
2941 system a library to run on another machine and/or operating system. All
2942 you need to do is set the variable `HOST_CC' in `configparms' to the
2943 native compiler for programs to run on the machine you are building on (a
2944 few generator programs are used on Unix systems); set `CC' to the
2947 * The new function `fexecve' (only implemented on the GNU system) executes
2948 a program file given a file descriptor already open on the file.
2952 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2953 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2955 * You can set the variable `libprefix' in `configparms' to specify a prefix
2956 to be prepended to installed library files; this makes it easy to install
2957 the GNU C library to be linked as `-lgnuc' or whatever.
2959 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2960 copies a limited number of characters from a string, and returns the
2961 address of the last character written.
2963 * You no longer need to check for whether the installed `stddef.h' is
2964 compatible with the GNU C library. configure now checks for you.
2966 * You can now define a per-stream `fileno' function to convert the
2967 stream's cookie into an integral file descriptor.
2969 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2970 allocates zero bytes of storage, and returns a unique pointer which
2971 you can pass to `realloc' or `free'. The behavior is undefined if
2972 you dereference this pointer.
2974 * The C library now runs on Sony NEWS m68k machines running either
2975 NewsOS 3 or NewsOS 4.
2977 * The new `syscall' function is a system-dependent primitive function
2978 for invoking system calls. It has the canonical behavior on Unix
2979 systems, including unreliable return values for some calls (such as
2980 `pipe', `fork' and `getppid').
2982 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2983 to `EAGAIN', which is the preferred name. On systems whose kernels
2984 use two distinct codes, the C library now translates EWOULDBLOCK to
2985 EAGAIN in every system call function.
2989 * The GNU C Library Reference Manual is now distributed with the library.
2990 `make dvi' will produce a DVI file of the printed manual.
2991 `make info' will produce Info files that you can read on line using C-h i
2992 in Emacs or the `info' program.
2993 Please send comments on the manual to bug-glibc-manual@gnu.org.
2995 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2997 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2999 * Jason Merrill has contributed a port to the Sequent Symmetry running
3000 Dynix version 3 (i386-sequent-dynix).
3002 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3003 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3005 * New function `memory_warnings' lets you arrange to get warnings when
3006 malloc is running out of memory to allocate, like Emacs gives you.
3008 * The C library now contains the relocating allocator used in Emacs 19 for
3009 its editing buffers. This allocator (ralloc) minimizes allocation
3010 overhead and fragmentation by moving allocated regions around whenever it
3011 needs to. You always refer to a ralloc'd region with a "handle" (a
3012 pointer to a pointer--an object of type `void **').
3014 * There is a new `printf' format: `%m' gives you the string corresponding
3015 to the error code in `errno'.
3017 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3018 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3019 pass, the `a' modifier says to fill in a `char **' you pass with a
3022 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3023 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3024 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3026 * `mkstemp' is a traditional Unix function to atomically create and open a
3027 uniquely-named temporary file.
3031 * The standard location for the file that says what the local timezone is
3032 has changed again. It is now `/usr/local/etc/localtime' (or more
3033 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3035 * The distribution no longer contains any files with names longer than 14
3038 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3039 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3041 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3045 * The configuration process has changed quite a bit. The `configure'
3046 script is now used just like the configuration scripts for other GNU
3047 packages. The `sysdeps' directory hierarchy is much rearranged.
3048 The file `INSTALL' explains the new scheme in detail.
3050 * The header files no longer need to be processed into ANSI C and
3051 traditional C versions. There is just one set of files to install, and
3052 it will work with ANSI or old C compilers (including `gcc -traditional').
3054 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3055 MIPS DECStation running Ultrix 4.
3057 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3058 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3059 made itself into a shared library.
3061 * Yet further improved support for the i386, running 4.3 BSD-like systems
3062 (such as Mach 3 with the Unix single-server), or System V.
3064 * New function `strncasecmp' to do case-insensitive string comparison
3065 with limited length.
3067 * New function `strsep' is a reentrant alternative to `strtok'.
3069 * New functions `scandir' and `alphasort' for searching directories.
3071 * New function `setenv' is a better interface to `putenv'.
3073 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3074 function for traversing a directory tree.
3076 * The GNU obstack package is now also part of the C library.
3077 The new function `open_obstack_stream' creates a stdio stream that
3078 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3079 formatted output directly to an obstack.
3081 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3082 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3084 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3086 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3087 things to your strings.
3089 * There are some new test programs: test-fseek, testmb, and testrand.
3091 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3092 These ports are not finished, but are a good starting place for really
3093 supporting those systems.
3095 * `/etc/localtime' is now the standard location for the file that says what
3096 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3097 This follows the general principle that `/etc' is the place for all local
3098 configuration files.
3100 * The C library header files now use `extern "C"' when used by the C++
3101 compiler, so the C library should now work with C++ code.
3103 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3104 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3107 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3108 function which uses the `merge sort' algorithm, and is said to be
3109 significantly faster than the old GNU `qsort' function. Merge sort is
3110 now the standard `qsort' function. The new algorithm can require a lot
3111 of temporary storage; so, the old sorting function is called when the
3112 required storage is not available.
3114 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3115 provides the Unix `crypt' function, plus some other entry points.
3117 * The code and header files taken from 4.4 BSD have been updated with the
3118 latest files released from Berkeley.
3120 ----------------------------------------------------------------------
3121 Copyright information:
3123 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3125 Permission is granted to anyone to make or distribute verbatim copies
3126 of this document as received, in any medium, provided that the
3127 copyright notice and this permission notice are preserved,
3128 thus giving the recipient permission to redistribute in turn.
3130 Permission is granted to distribute modified versions
3131 of this document, or of portions of it,
3132 under the above conditions, provided also that they
3133 carry prominent notices stating who last changed them.
3136 version-control: never