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 It has been replaced by pap_AW & pap_CW, both of which have long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 * The long unused localedef --old-style option has been removed. It hasn't
40 done anything in over 16 years. Scripts using this option can safely
43 Security related changes:
45 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
46 could result in a stack overflow when getnetbyname was called with an
47 overly long name. (CVE-2016-3075)
49 * Previously, getaddrinfo copied large amounts of address data to the stack,
50 even after the fix for CVE-2013-4458 has been applied, potentially
51 resulting in a stack overflow. getaddrinfo now uses a heap allocation
52 instead. Reported by Michael Petlan. (CVE-2016-3706)
54 * The glob function suffered from a stack-based buffer overflow when it was
55 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
56 Reported by Alexander Cherepanov. (CVE-2016-1234)
58 * The Sun RPC UDP client could exhaust all available stack space when
59 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
60 alloca plugin for GCC. (CVE-2016-4429)
62 The following bugs are resolved with this release:
64 [The release manager will add the list generated by
65 scripts/list-fixed-bugs.py just before the release.]
69 * Unicode 8.0.0 Support: Character encoding, character type info, and
70 transliteration tables are all updated to Unicode 8.0.0, using new
71 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
72 These updates cause user visible changes, such as the fixes for bugs
75 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
76 kernel-internal CPU set size. This means that requests that change the
77 CPU affinity which failed before (for example, an all-ones CPU mask) will
78 now succeed. Applications that need to determine the effective CPU
79 affinities need to call sched_getaffinity or pthread_getaffinity_np after
80 setting it because the kernel can adjust it (and the previous size check
81 would not detect this in the majority of cases).
83 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
84 the following new symbols are used: fts64_children, fts64_close,
85 fts64_open, fts64_read and fts64_set.
87 * getaddrinfo now detects certain invalid responses on an internal netlink
88 socket. If such responses are received, an affected process will
89 terminate with an error message of "Unexpected error <number> on netlink
90 descriptor <number>" or "Unexpected netlink response of size <number> on
91 descriptor <number>". The most likely cause for these errors is a
92 multi-threaded application which erroneously closes and reuses the netlink
93 file descriptor while it is used by getaddrinfo.
95 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
96 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
97 unnecessary serialization of memory allocation requests across threads.
98 The defect is now corrected. Users should see a substantial increase in
99 the concurent throughput of allocation requests for applications which
100 trigger this bug. Affected applications typically create and
101 destroy threads frequently. (Bug 19048 was reported and analyzed by
104 * There is now a --disable-timezone-tools configure option for disabling the
105 building and installing of the timezone related utilities (zic, zdump, and
106 tzselect). This is useful for people who build the timezone data and code
107 independent of the GNU C Library.
109 * The obsolete header <regexp.h> has been removed. Programs that require
110 this header must be updated to use <regex.h> instead.
112 * The obsolete functions bdflush, create_module, get_kernel_syms,
113 query_module and uselib are no longer available to newly linked binaries;
114 the header <sys/kdaemon.h> has been removed. These functions and header
115 were specific to systems using the Linux kernel and could not usefully be
116 used with the GNU C Library on systems with version 2.6 or later of the
119 * Optimized string, wcsmbs and memory functions for IBM z13.
120 Implemented by Stefan Liebler.
122 * Newly linked programs that define a variable called signgam will no longer
123 have it set by the lgamma, lgammaf and lgammal functions. Programs that
124 require signgam to be set by those functions must ensure that they use the
125 variable provided by the GNU C Library and declared in <math.h>, without
126 defining their own copy.
128 * The minimum GCC version that can be used to build this version of the GNU
129 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
130 still be used to compile programs using the GNU C Library.
132 Security related changes:
134 * An out-of-bounds value in a broken-out struct tm argument to strftime no
135 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
137 * The LD_POINTER_GUARD environment variable can no longer be used to disable
138 the pointer guard feature. It is always enabled. Previously,
139 LD_POINTER_GUARD could be used to disable security hardening in binaries
140 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
143 * An integer overflow in hcreate and hcreate_r could lead to an
144 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
146 * The catopen function no longer has unbounded stack usage. Reported by
149 * The nan, nanf and nanl functions no longer have unbounded stack usage
150 depending on the length of the string passed as an argument to the
151 functions. Reported by Joseph Myers. (CVE-2014-9761)
153 * A stack-based buffer overflow was found in libresolv when invoked from
154 libnss_dns, allowing specially crafted DNS responses to seize control
155 of execution flow in the DNS client. The buffer overflow occurs in
156 the functions send_dg (send datagram) and send_vc (send TCP) for the
157 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
158 family. The use of AF_UNSPEC triggers the low-level resolver code to
159 send out two parallel queries for A and AAAA. A mismanagement of the
160 buffers used for those queries could result in the response of a query
161 writing beyond the alloca allocated buffer created by
162 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
163 the overflow. Thanks to the Google Security Team and Red Hat for
164 reporting the security impact of this issue, and Robert Holiday of
165 Ciena for reporting the related bug 18665. (CVE-2015-7547)
167 The following bugs are resolved with this release:
169 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
170 [887] math: Math library function "logb" and "nextafter" inconsistent
171 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
172 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
173 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
174 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
176 [4404] localedata: German translation of "Alarm clock" is misleading
177 [6799] math: nextafter() and nexttoward() doen't set errno on
178 overflow/underflow errors
179 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
181 [10432] nis: _nss_nis_setnetgrent assertion failure
182 [11460] libc: fts has no LFS support
183 [12926] network: getaddrinfo()/make_request() may spin forever
184 [13065] nptl: Race condition in pthread barriers
185 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
186 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
188 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
189 [14912] libc: Rename non-installed bits/*.h headers
190 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
191 [15367] math: Let gcc use __builtin_isinf
192 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
193 [15421] math: lgamma wrongly sets signgam for ISO C
194 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
195 FE_INVALID with argument out of range
196 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
198 [15786] dynamic-link: ifunc resolver functions can smash function
200 [15918] math: Unnecessary check for equality in hypotf()
201 [16061] localedata: Review / update transliteration data
202 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
204 [16141] time: strptime %z offset restriction
205 [16171] math: drem should be alias of remainder
206 [16296] math: fegetround is pure?
207 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
208 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
210 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
211 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
213 [16422] math: [powerpc] math-float, math-double failing llrint tests with
214 "Exception "Inexact" set" on ppc32
215 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
216 [16517] math: Missing underflow exception from tanf/tan/tanl
217 [16519] math: Missing underflow exception from sinhf
218 [16520] math: Missing underflow exception from tanhf
219 [16521] math: Missing underflow exception from exp2
220 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
222 [16734] stdio: fopen calls mmap to allocate its buffer
223 [16961] math: nan function incorrect handling of bad sequences
224 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
225 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
226 [16985] locale: localedef: confusing error message when opening output
228 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
229 [17197] locale: Redundant shift character in iconv conversion output at
231 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
232 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
233 [17250] dynamic-link: static linking breaks nss loading
234 (getaddrinfo/getpwnam/etc...)
235 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
237 [17441] math: isnan() should use __builtin_isnan() in GCC
238 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
239 (related to lock elision)
240 [17787] manual: Exponent on page 324 of the PDF ends prematurely
241 [17886] time: strptime should be able to parse "Z" as a timezone with %z
242 [17887] time: strptime should be able to parse "+01:00" style timezones
243 [17905] libc: catopen() Multiple unbounded stack allocations
245 [18084] libc: backtrace (..., 0) dumps core on x86
246 [18086] libc: nice() sets errno to 0 on success
247 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
248 is too large (CVE-2015-8778)
249 [18251] dynamic-link: SONAME missing when audit modules provides path
250 [18265] libc: add attributes for wchar string and memory functions
251 [18370] math: csqrt missing underflows
252 [18421] libc: [hppa] read-only segment has dynamic relocations
253 [18472] libc: Obsolete syscall wrappers should be compat symbols
254 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
255 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
256 [18525] localedata: Remove locale timezone information
257 [18560] libc: [powerpc] spurious bits/ipc.h definitions
258 [18568] localedata: Update locale data to Unicode 8.0
259 [18589] locale: sort-test.sh fails at random
260 [18595] math: ctan, ctanh missing underflows
261 [18604] libc: assert macro-expands its argument
262 [18610] math: S390: fetestexcept() reports any exception if DXC-code
263 contains a vector instruction exception.
264 [18611] math: j1, jn missing errno setting on underflow
265 [18618] localedata: sync Chechen locale definitions with other *_RU
267 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
268 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
269 [18665] network: In send_dg, the recvfrom function is NOT always using the
270 buffer size of a newly created buffer (CVE-2015-7547)
271 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
273 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
275 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
276 [18699] math: tilegx cproj() for various complex infinities does not yield
278 [18724] libc: Harden put*ent functions against data injection
279 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
280 [18755] build: build errors with -DNDEBUG
281 [18757] stdio: fmemopen fails to set errno on failure
282 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
284 [18781] libc: openat64 lacks O_LARGEFILE
285 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
286 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
287 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
288 [18790] math: [ldbl-128ibm] tanhl inaccurate
289 [18795] libc: stpncpy fortification misses buffer lengths that are
291 [18796] build: build fails for --disable-mathvec
292 [18803] math: hypot missing underflows
293 [18820] stdio: fmemopen may leak memory on failure
294 [18823] math: csqrt spurious underflows
295 [18824] math: fma spurious underflows
296 [18825] math: pow missing underflows
297 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
298 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
299 [18870] build: sem_open.c fails to compile with missing symbol
301 [18872] stdio: Fix memory leak in printf_positional
302 [18873] libc: posix_fallocate overflow check ineffective
303 [18875] math: Excess precision leads incorrect libm
304 [18877] libc: arm: mmap offset regression
305 [18887] libc: memory corruption when using getmntent on blank lines
306 [18918] localedata: hu_HU: change time to HH:MM:SS format
307 [18921] libc: Regression: extraneous stat() and fstat() performed by
309 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
310 binaries (CVE-2015-8777)
311 [18951] math: tgamma missing underflows
312 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
314 [18953] localedata: lt_LT: change currency symbol to the euro
315 [18956] math: powf inaccuracy
316 [18961] math: [i386] exp missing underflows
317 [18966] math: [i386] exp10 missing underflows
318 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
319 [18969] build: multiple string test failures due to missing locale
321 [18970] libc: Reference of pthread_setcancelstate in libc.a
322 [18977] math: float / long double Bessel functions not in XSI POSIX
323 [18980] math: i386 libm functions return with excess range and precision
324 [18981] math: i386 scalb*, ldexp return with excess range and precision
325 [18982] stdio: va_list and vprintf
326 [18985] time: Passing out of range data to strftime() causes a segfault
328 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
329 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
330 [19012] locale: iconv_open leaks memory on error path
331 [19016] math: clog, clog10 inaccuracy
332 [19018] nptl: Mangle function pointers in tls_dtor_list
333 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
334 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
335 [19048] malloc: malloc: arena free list can become cyclic, increasing
337 [19049] math: [powerpc] erfc incorrect zero sign
338 [19050] math: [powerpc] log* incorrect zero sign
339 [19058] math: [x86_64] Link fail with -fopenmp and -flto
340 [19059] math: nexttoward overflow incorrect in non-default rounding modes
341 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
342 [19074] network: Data race in _res_hconf_reorder_addrs
343 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
344 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
345 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
347 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
349 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
350 [19086] manual: posix_fallocate64 documented argument order is wrong.
351 [19088] math: lround, llround missing exceptions close to overflow
353 [19094] math: lrint, llrint missing exceptions close to overflow threshold
354 [19095] math: dbl-64 lrint incorrect for 64-bit long
355 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
356 [19124] dynamic-link: ld.so failed to build with older assmebler
357 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
358 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
359 [19134] math: [powerpc32] lround, lroundf spurious exceptions
360 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
361 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
362 pthread_setaffinity_np
363 [19156] math: [ldbl-128] j0l spurious underflows
364 [19164] nptl: tst-getcpu fails with many possible CPUs
365 [19168] math: math/test-ildoubl and math/test-ldouble failure
366 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
367 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
369 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
370 (FE_NOMASK_ENV) do not clear SSE exceptions
371 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
372 _int_new_arena/reused_arena
373 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
374 [19201] math: dbl-64 remainder incorrect sign of zero result
375 [19205] math: bits/math-finite.h conditions do not match math.h and
377 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
378 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
379 for C99-based standards
380 [19212] libc: features.h not -Wundef clean
381 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
383 [19214] libc: Family and model identification for AMD CPU's are incorrect.
384 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
385 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
387 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
389 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
391 [19242] libc: strtol incorrect in Turkish locales
392 [19243] malloc: reused_arena can pick an arena on the free list, leading
393 to an assertion failure and reference count corruption
394 [19253] time: tzset() ineffective when temporary TZ did not include DST
396 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
397 [19270] math: [hppa] Shared libm missing __isnanl
398 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
399 MAP_HUGETLB and MAP_STACK defines
400 [19313] nptl: Wrong __cpu_mask for x32
401 [19347] libc: grantpt: try to force a specific gid even without pt_chown
402 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
403 [19350] math: [ldbl-128ibm] sinhl spurious overflows
404 [19351] math: [ldbl-128ibm] logl inaccurate near 1
405 [19363] time: x32: times() return value wrongly truncates/sign extends
407 [19367] dynamic-link: Improve branch prediction on Silvermont
408 [19369] network: Default domain name not reset by res_ninit when "search"
409 / "domain" entry is removed from resolv.conf
410 [19375] math: powerpc: incorrect results for POWER7 logb with negative
412 [19385] localedata: bg_BG: time separator should be colon, not comma
413 [19408] libc: linux personality syscall wrapper may erroneously return an
414 error on 32-bit architectures
415 [19415] libc: dladdr returns wrong names on hppa
416 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
417 IBM905, IBM907, and IBM909
418 [19439] math: Unix98 isinf and isnan functions conflict with C++11
419 [19443] build: build failures with -DDEBUG
420 [19451] build: Make check fails on test-double-vlen2
421 [19462] libc: Glibc failed to build with -Os
422 [19465] math: Wrong code with -Os
423 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
425 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
427 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
428 [19486] math: S390: Math tests fail with "Exception Inexact set".
429 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
430 [19550] libc: [mips] mmap negative offset handling inconsistent with other
432 [19590] math: Fail to build shared objects that use libmvec.so functions.
436 * The following bugs are resolved with this release:
438 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
439 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
440 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
441 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
442 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
443 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
444 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
445 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
446 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
447 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
448 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
449 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
450 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
451 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
452 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
453 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
454 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
455 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
456 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
457 18657, 18676, 18694, 18696, 18887.
459 * Cache information can be queried via sysconf() function on s390 e.g. with
460 _SC_LEVEL1_ICACHE_SIZE as argument.
462 * A buffer overflow in gethostbyname_r and related functions performing DNS
463 requests has been fixed. If the NSS functions were called with a
464 misaligned buffer, the buffer length change due to pointer alignment was
465 not taken into account. This could result in application crashes or,
466 potentially arbitrary code execution, using crafted, but syntactically
467 valid DNS responses. (CVE-2015-1781)
469 * The time zone file parser has been made more robust against crafted time
470 zone files, avoiding heap buffer overflows related to the processing of
471 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
472 large time zone data files. Overly long time zone specifiers in the TZ
473 variable no longer result in stack overflows and crashes.
475 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
476 for LD and GD on x86 and x86-64, has been implemented. You will need
477 binutils-2.24 or later to enable this optimization.
479 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
480 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
481 Hat). These updates cause user visible changes, such as the fix for bug
484 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
485 and getXXbyYY NSS calls for the same database, causing a denial-of-service
486 condition in some applications.
488 * Added vector math library named libmvec with the following vectorized x86_64
489 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
491 The library can be disabled with --disable-mathvec. Use of the functions is
492 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
493 Shared library libmvec.so is linked in as needed when using -lm (no need to
494 specify -lmvec explicitly for not static builds).
495 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
497 * A new fmemopen implementation has been added with the goal of POSIX
498 compliance. The new implementation fixes the following long-standing
499 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
500 old implementation is still present for use be by existing binaries.
502 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
503 releases. It has been fixed to match 2.19 and older, but binaries built
504 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
506 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
507 Contributed by Roland McGrath (Google).
509 * The header <regexp.h> is deprecated, and will be removed in a future
510 release. Use of this header will trigger a deprecation warning.
511 Application developers should update their code to use <regex.h> instead.
513 This header was formerly part of SUS, but was deprecated in 1994 and
514 removed from the standard in 2001. Also, the glibc implementation
515 leaks memory. See BZ#18681 for more details.
519 * The following bugs are resolved with this release:
521 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
522 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
523 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
524 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
525 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
526 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
527 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
528 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
529 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
530 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
533 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
534 too little memory for the to-be-scanned arguments and overflow the
535 allocated buffer. The implementation now correctly computes the required
536 buffer size when using malloc, and switches to malloc from alloca as
539 * A new semaphore algorithm has been implemented in generic C code for all
540 machines. Previous custom assembly implementations of semaphore were
541 difficult to reason about or ensure that they were safe. The new version
542 of semaphore supports machines with 64-bit or 32-bit atomic operations.
543 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
544 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
546 * Port to Altera Nios II has been contributed by Mentor Graphics.
548 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
549 implementations for powerpc64/powerpc64le.
550 Implemented by Adhemerval Zanella (IBM).
552 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
553 and powerpc64le. This may improve lock scaling of existing programs on
554 HTM capable systems. The lock elision code is only enabled with
555 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
556 powerpc will issue a transaction abort on every syscall to avoid side
557 effects being visible outside transactions.
559 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
560 AArch64. Contributed by ARM Ltd.
562 * i386 memcpy functions optimized with SSE2 unaligned load/store.
564 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
565 under certain input conditions resulting in the execution of a shell for
566 command substitution when the application did not request it. The
567 implementation now checks WRDE_NOCMD immediately before executing the
568 shell and returns the error WRDE_CMDSUB as expected.
570 * CVE-2012-3406 printf-style functions could run into a stack overflow when
571 processing format strings with a large number of format specifiers.
573 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
574 infinite loop if the DNS response contained a PTR record of an unexpected
577 * The minimum GCC version that can be used to build this version of the GNU
578 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
579 still be used to compile programs using the GNU C Library.
581 * The GNU C Library is now built with -Werror by default. This can be
582 disabled by configuring with --disable-werror.
584 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
586 * The obsolete sigvec function has been removed. This was the original
587 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
588 programs have been using instead for about 25 years. Of course, ABI
589 compatibility for old binaries using sigvec remains intact.
591 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
592 with newer versions of bison.
594 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
595 The original MIPS o32 hard-float ABI requires an FPU where double-precision
596 registers overlay two consecutive single-precision registers. MIPS32R2
597 introduced a new FPU mode (FR=1) where double-precision registers extend the
598 corresponding single-precision registers which is incompatible with the
599 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
600 require the use of FR=1 making a transition necessary. New o32 ABI
601 extensions enable users to migrate over time from the original o32 ABI
602 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
603 tracks the ABI of any loaded object and verifies that new objects are
604 compatible. Mode transitions will also be requested as required and
605 unsupportable objects will be rejected. The ABI checks include both soft and
606 hard float ABIs for o32, n32 and n64.
608 GCC 5 with GNU binutils 2.25 onwards:
609 It is strongly recommended that all o32 system libraries are built using the
610 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
611 with the original and all new o32 ABI extensions. Configure a MIPS GCC
612 compiler using --with-fp-32=xx to set this by default.
616 * The following bugs are resolved with this release:
618 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
619 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
620 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
621 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
622 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
623 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
624 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
625 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
626 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
627 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
628 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
629 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
630 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
631 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
632 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
634 * Reverted change of ABI data structures for s390 and s390x:
635 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
636 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
637 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
638 are preserved pointing straight to the same implementation as the old ones.
639 Given that, new callers will simply provide a too-big buffer to these
640 functions. Any applications/libraries out there that embed jmp_buf or
641 ucontext_t in an ABI-relevant data structure that have already been rebuilt
642 against 2.19 headers will have to rebuilt again. This is necessary in any
643 case to revert the breakage in their ABI caused by the glibc change.
645 * Support for file description locks is added to systems running the
646 Linux kernel. The standard file locking interfaces are extended to
647 operate on file descriptions, not file descriptors, via the use of
648 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
649 are associated with an open file instead of a process.
651 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
653 * The minimum Linux kernel version that this version of the GNU C Library
654 can be used with is 2.6.32.
656 * Running the testsuite no longer terminates as soon as a test fails.
657 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
658 with PASS or FAIL lines for individual tests. A summary of the results is
659 printed, including a list of failing lists, and "make check" exits with
660 error status if there were any unexpected failures. "make check
661 stop-on-test-failure=y" may be used to keep the old behavior.
663 * The am33 port, which had not worked for several years, has been removed
666 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
667 supported; they now act the same as _DEFAULT_SOURCE (but generate a
668 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
669 conflicted with POSIX (support for which was removed in 2.19), the
670 interfaces those macros enabled remain available when compiling with
671 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
674 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
676 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
677 This may improve lock scaling of existing programs on TX capable systems.
678 The lock elision code is only built with --enable-lock-elision=yes and
679 then requires a GCC version supporting the TX builtins. With lock elision
680 default mutexes are elided via __builtin_tbegin, if the cpu supports
681 transactions. By default lock elision is not enabled and the elision code
684 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
685 copy the path argument. This allowed programs to cause posix_spawn to
686 deference a dangling pointer, or use an unexpected pathname argument if
687 the string was modified after the posix_spawn_file_actions_addopen
690 * All supported architectures now use the main glibc sysdeps directory
691 instead of some being in a separate "ports" directory (which was
692 distributed separately before glibc 2.17).
694 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
695 On configurations that support it (all Linux configurations), it's now
696 used regardless of the --enable-add-ons switch to configure. It is no
697 longer possible to build such configurations without pthreads support.
699 * Locale names, including those obtained from environment variables (LANG
700 and the LC_* variables), are more tightly checked for proper syntax.
701 setlocale will now fail (with EINVAL) for locale names that are overly
702 long, contain slashes without starting with a slash, or contain ".." path
703 components. (CVE-2014-0475) Previously, some valid locale names were
704 silently replaced with the "C" locale when running in AT_SECURE mode
705 (e.g., in a SUID program). This is no longer necessary because of the
708 * On x86-64, the dynamic linker's lazy-binding support is now compatible
709 with application code using Intel MPX instructions. (With all previous
710 versions, the MPX register state could be clobbered when making calls
711 into or out of a shared library.) Note that while the new dynamic
712 linker is compatible with all known x86 hardware whether or not it
713 supports Intel MPX, some x86 instruction-set emulators might fail to
714 handle the new instruction encodings. This is known to affect Valgrind
715 versions up through 3.9 (but will be fixed in the forthcoming 3.10
716 release), and might affect other tools that do instruction emulation.
718 * Support for loadable gconv transliteration modules has been removed.
719 The support for transliteration modules has been non-functional for
720 over a decade, and the removal is prompted by security defects. The
721 normal gconv conversion modules are still supported. Transliteration
722 with //TRANSLIT is still possible, and the //IGNORE specifier
723 continues to be supported. (CVE-2014-5119)
725 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
726 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
727 resulting a denial-of-service security vulnerability in applications which
728 use functions related to iconv. (CVE-2014-6040)
732 * The following bugs are resolved with this release:
734 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
735 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
736 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
737 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
738 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
739 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
740 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
741 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
742 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
743 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
744 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
745 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
746 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
747 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
748 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
749 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
750 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
751 16431, 16453, 16474, 16506, 16510, 16529
753 * Slovenian translations for glibc messages have been contributed by the
754 Translation Project's Slovenian team of translators.
756 * The public headers no longer use __unused nor __block. This change is to
757 support compiling programs that are derived from BSD sources and use
758 __unused internally, and to support compiling with Clang's -fblock
759 extension which uses __block.
761 * CVE-2012-4412 The strcoll implementation caches indices and rules for
762 large collation sequences to optimize multiple passes. This cache
763 computation may overflow for large collation sequences and may cause a
764 stack or buffer overflow. This is now fixed to use a slower algorithm
765 which does not use a cache if there is an integer overflow.
767 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
768 rules for large collation sequences to optimize multiple passes and falls
769 back to alloca if malloc fails, resulting in a possible stack overflow.
770 The implementation now falls back to an uncached collation sequence lookup
773 * CVE-2013-4788 The pointer guard used for pointer mangling was not
774 initialized for static applications resulting in the security feature
775 being disabled. The pointer guard is now correctly initialized to a
776 random value for static applications. Existing static applications need
777 to be recompiled to take advantage of the fix (bug 15754).
779 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
780 to the d_name member of struct dirent, or omit the terminating NUL
781 character. (Bugzilla #14699).
783 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
784 aligned_alloc functions could allocate too few bytes or corrupt the
785 heap when passed very large allocation size values (Bugzilla #15855,
788 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
789 for AF_INET6 has been fixed (Bugzilla #16072).
791 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
792 pap_CW, quz_PE, the_NP.
794 * Substantially revised locales: gd_GB, ht_HT
796 * The LC_ADDRESS field was updated to support country_car for almost all
799 * ISO 1427 definitions were updated.
801 * ISO 3166 definitions were updated.
803 * The localedef utility now supports --big-endian and --little-endian
804 command-line options to generate locales for a different system from that
805 for which the C library was built.
807 * Binary locale files now only depend on the endianness of the system for
808 which they are generated and not on other properties of that system. As a
809 consequence, binary files generated with new localedef may be incompatible
810 with old versions of the GNU C Library, and binary files generated with
811 old localedef may be incompatible with this version of the GNU C Library,
812 in the following circumstances:
814 + Locale files may be incompatible on m68k systems.
816 + Locale archive files (but not separate files for individual locales) may
817 be incompatible on systems where plain "char" is signed.
819 * The configure option --disable-versioning has been removed. Builds with
820 --disable-versioning had not worked for several years.
822 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
823 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
825 * SystemTap probes for malloc have been introduced.
827 * SystemTap probes for slow multiple precision fallback paths of
828 transcendental functions have been introduced.
830 * Support for powerpc64le has been added.
832 * The soft-float powerpc port now supports e500 processors.
834 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
836 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
837 set of header declarations that are enabled by default, even when other
838 feature test macros or compiler options such as -std=c99 would otherwise
839 disable some of those declarations.
841 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
842 conflict with POSIX. The libbsd-compat library (which was a dummy library
843 that did nothing) has also been removed.
845 * Preliminary documentation about Multi-Thread, Async-Signal and
846 Async-Cancel Safety has been added.
848 * Change of ABI data structures for s390 and s390x:
849 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
850 allow for future hardware extensions. All library functions that accept or
851 return these structures were versioned in order to provide backwards
852 compatibility with existing code. However, not all cases can be handled
853 with interface versioning. If an application embeds either structure into
854 another structure and that structure is passed to another compilation unit
855 which expects the newer larger-sized object then any access to the new
856 fields will result in undefined behaviour. Similarly any access to fields
857 that were moved by the enlarging of the structures will cause undefined
858 behaviour. To fix the undefined behaviour all objects that are part of the
859 final in-memory image must agree on the size of structures, and this may
860 require recompilation.
864 * The following bugs are resolved with this release:
866 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
867 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
868 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
869 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
870 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
871 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
872 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
873 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
874 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
875 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
876 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
877 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
878 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
881 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
882 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
883 Distributions can re-enable building and using pt_chown via the new configure
884 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
885 considerable security risks and should only be used if the distribution
886 understands and accepts the risks.
888 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
891 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
892 fixed (Bugzilla #15330).
894 * Add support for calling C++11 thread_local object destructors on thread
895 and program exit. This needs compiler support for offloading C++11
896 destructor calls to glibc.
898 * Improved worst case performance of libm functions with double inputs and
901 * Support for priority inherited mutexes in pthread condition variables on
902 non-x86 architectures.
904 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
906 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
908 * Optimized string functions for ARM. Implemented by Will Newton and
911 * Optimized libm functions for SPARC. Implemented by David S. Miller.
913 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
916 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
917 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
919 * Added a benchmark framework to track performance of functions in glibc.
921 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
922 It is based on draft TS 18661 and currently enabled as a GNU extension.
924 * On Linux, the clock function now uses the clock_gettime system call
925 for improved precision, rather than old times system call.
927 * Added support for version-3 tz format files. This is needed when using
928 the tz database release 2013e or later, and affects a few unusual cases --
929 currently only TZ='America/Godthab' for time stamps after 2037.
931 * Added new API functions pthread_getattr_default_np and
932 pthread_setattr_default_np to get and set the default pthread
933 attributes of a process.
935 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
936 This may improve lock scaling of existing programs on TSX capable systems.
937 When the --enable-lock-elision=yes parameter is specified at configure
938 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
941 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
942 availability). Implemented by Ryan S. Arnold.
944 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
948 * The following bugs are resolved with this release:
950 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
951 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
952 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
953 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
954 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
955 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
956 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
957 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
958 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
959 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
960 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
961 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
962 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
963 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
964 14879, 14889, 14893, 14898, 14914.
966 * Optimization of memcpy for MIPS.
968 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
969 EMFILE has been fixed (Bugzilla #14889).
971 * The add-on ports collection is now distributed in the "ports" subdirectory
972 of the main GNU C Library distribution, rather than separately.
974 * Port to ARM AArch64 contributed by Linaro.
976 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
977 Optimized versions of memcpy, memset, and memcmp added for System z10 and
979 Implemented by Andreas Krebbel.
981 * The new function secure_getenv allows secure access to the environment,
982 returning NULL if running in a SUID/SGID process. This function replaces
983 the internal function __secure_getenv.
985 * SystemTap static probes have been added into the dynamic linker.
986 Implemented by Gary Benson.
988 * Optimizations of string functions strstr, strcasestr and memmem.
989 Implemented by Maxim Kuvyrkov.
991 * The minimum Linux kernel version that this version of the GNU C Library
992 can be used with is 2.6.16.
994 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
995 powerpc POWER7. Implemented by Will Schmidt.
997 * New configure option --disable-nscd builds the C library such that it
998 never attempts to contact the Name Service Caching Daemon (nscd).
999 New configure option --disable-build-nscd avoids building nscd itself;
1000 this is the default if --disable-nscd is used.
1002 * Improved support for cross-compilation, including cross-testing and
1003 bootstrap builds without a previously built glibc.
1005 * Several testsuite tests are now able to test multiple IFUNC variants of an
1006 interface, rather than just testing the one that would be chooen by
1009 * New configure options --with-bugurl and --with-pkgversion, for
1010 distributors to use to embed their bug-reporting and package version
1011 information in --help and --version output.
1013 * The ttyname and ttyname_r functions on Linux now fall back to searching for
1014 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
1015 allows creation of chroots without the procfs mounted on /proc.
1017 * The `crypt' function now fails if passed salt bytes that violate the
1018 specification for those values. On Linux, the `crypt' function will
1019 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
1020 enabled, and fail on encrypted strings using the MD5 or DES algorithm
1021 when the mode is enabled.
1023 * The `clock_*' suite of functions (declared in <time.h>) is now available
1024 directly in the main C library. Previously it was necessary to link with
1025 -lrt to use these functions. This change has the effect that a
1026 single-threaded program that uses a function such as `clock_gettime' (and
1027 is not linked with -lrt) will no longer implicitly load the pthreads
1028 library at runtime and so will not suffer the overheads associated with
1029 multi-thread support in other code such as the C++ runtime library.
1031 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
1036 * The following bugs are resolved with this release:
1038 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
1039 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
1040 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
1041 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
1042 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
1043 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
1044 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
1045 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
1046 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
1047 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
1048 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
1049 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
1050 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
1051 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
1052 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
1053 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
1054 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
1055 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
1056 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
1057 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
1058 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1059 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1062 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1063 configuring glibc with:
1064 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1065 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1066 Implemented by H.J. Lu.
1070 + define static_assert
1072 + do not declare gets
1074 + declare at_quick_exit and quick_exit also for ISO C11
1076 + aligned_alloc. NB: The code is deliberately allows the size parameter
1077 to not be a multiple of the alignment. This is a moronic requirement
1078 in the standard but it is only a requirement on the caller, not the
1081 + timespec_get added
1083 + uchar.h support added
1085 + CMPLX, CMPLXF, CMPLXL added
1087 Implemented by Ulrich Drepper.
1089 * Support for the IA-64 has been moved to ports.
1091 * Remove support for anything but ELF binary format
1093 * Checking versions of poll, ppoll added.
1094 Implemented by Ulrich Drepper.
1096 * More generic and 64-bit performance optimizations to math functions.
1097 Implemented by Ulrich Drepper.
1099 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1100 headers and functions available at compile time as they were before
1101 version 2.14. This option will be removed at some time in the future
1102 after the TI-RPC library becomes fully sufficient for the needs of
1103 existing applications.
1105 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1106 Note that glibc is not expected to work with any Linux kernel version
1109 * New header <sys/auxv.h> and function getauxval allowing easy access to
1110 the AT_* key-value pairs passed from the Linux kernel. The header also
1111 defines the HWCAP_* bits associated with the AT_HWCAP key.
1113 * New locales: mag_IN
1115 * New configure option --enable-systemtap builds SystemTap static probes
1116 into libc for setjmp and longjmp and into libpthread for various operations.
1117 So far the setjmp/longjmp probes and some of the libpthread probes are
1118 provided only for i*86 and x86_64.
1119 Implemented by Roland McGrath and Rayson Ho.
1121 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1123 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1126 * More optimized functions for SPARC. Implemented by David S. Miller.
1128 * Improved support for cross-compilation, especially bootstrap builds
1129 without a previously built glibc.
1131 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1132 Chris Metcalf from Tilera.
1134 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1135 now supported for ARM processors.
1137 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1138 as the name of the dynamic linker, to distinguish it from the
1139 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1141 * Support for CRIS has been removed from ports.
1143 * A new class of installed header has been documented for low-level
1144 platform-specific functionality. PowerPC added the first instance with a
1145 function to provide time base register access. Contributed by Tulio
1146 Magno Quites Machado Filho.
1148 * ix86 configurations now install header files that are consistent with
1149 what x86-64 configurations install. These same header files can be used
1150 for -m32, -m64, or -mx32 builds.
1151 Contributed by H.J. Lu.
1153 * Math library bug fixes. A thorough audit of all open math library bugs was
1154 conducted by Joseph Myers. Significant progress was made on many math
1155 library bugs resulting in more accurate exceptions and function results.
1156 Many thanks to all those that contributed including Andreas Jaeger for his
1157 patch review and work on the x87 trigonometric instruction issues.
1159 * Timezone data is no longer installed. Timezone-related binaries and scripts
1160 will continue to be installed. Users should obtain their timezone data from
1161 their distribution provider or from the tzdata package at
1162 <ftp://munnari.oz.au/pub/>.
1166 * The following bugs are resolved with this release:
1168 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1169 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1170 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1171 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1172 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1173 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1174 13484, 13506, 13515, 13523, 13524, 13538, 13540
1176 * New program pldd to list loaded object of a process
1177 Implemented by Ulrich Drepper.
1179 * Add nss_db support back to glibc. No more dependency on Berkeley db
1180 and support for initgroups lookups.
1181 Implemented by Ulrich Drepper.
1183 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1184 Contributed by HJ Lu.
1186 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1187 Contributed by HJ Lu.
1189 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1190 on x86-32 and x86-64.
1191 Contributed by Liubov Dmitrieva.
1193 * Optimized strchr and strrchr for SSE on x86-32.
1194 Contributed by Liubov Dmitrieva.
1196 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1197 for x86-64 and x86-32.
1198 Contributed by Liubov Dmitrieva.
1200 * New interfaces: scandirat, scandirat64
1201 Implemented by Ulrich Drepper.
1203 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1204 Implemented by Ulrich Drepper.
1206 * nscd now also caches the netgroup database.
1207 Implemented by Ulrich Drepper.
1209 * Integrate libm with gcc's -ffinite-math-only option.
1210 Implemented by Ulrich Drepper.
1212 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1213 to math functions. Implemented by Ulrich Drepper.
1215 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1216 Implemented by Ulrich Drepper.
1218 * New Linux interfaces: process_vm_readv, process_vm_writev
1220 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1221 Implemented by Ulrich Drepper.
1223 * Optimized nearbyint and strcasecmp for PPC.
1224 Implemented by Adhemerval Zanella.
1226 * New locales: bho_IN, unm_US, es_CU, ta_LK
1230 * The following bugs are resolved with this release:
1232 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1233 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1234 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1235 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1236 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1237 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1238 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1239 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1240 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1241 12795, 12811, 12813, 12814, 12841
1243 * The RPC implementation in libc is obsoleted. Old programs keep working
1244 but new programs cannot be linked with the routines in libc anymore.
1245 Programs in need of RPC functionality must be linked against TI-RPC.
1246 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1248 Visible changes of this change include (obviously) the inability to link
1249 programs using RPC functions without referencing the TI-RPC library and the
1250 removal of the RPC headers from the glibc headers.
1251 Implemented by Ulrich Drepper.
1253 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1254 syncfs, setns, sendmmsg
1256 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1257 yue_HK, lij_IT, mhr_RU
1259 * New encodings: CP770, CP771, CP772, CP773, CP774
1261 * New program sotruss to trace calls through PLTs
1262 Implemented by Ulrich Drepper.
1264 * The malloc hook implementation is marked deprecated and will be removed
1265 from the default implementation in the next version. The design never
1266 worked ever since the introduction of threads. Even programs which do
1267 not create threads themselves can use multiple threads created internally.
1271 * The following bugs are resolved with this release:
1273 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1274 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1275 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1276 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1279 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1281 * POWER7 optimizations: memset, memcmp, strncmp
1283 * New optimized string functions for x86-64: strnlen (SSE2),
1284 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1285 Implemented by Ulrich Drepper.
1289 * The following bugs are resolved with this release:
1291 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1292 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1293 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1294 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1295 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1296 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1297 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1298 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1300 * New interfaces: pthread_getname_np, pthread_setname_np
1302 * New Linux interface: recvmmsg
1304 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1306 * The dynamic linker now recognizes supported ABI versions from the
1307 EI_ABIVERSION field in the ELF header.
1308 Implemented by Ulrich Drepper.
1310 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1311 will not be used to fill in password fields in the passwd.byname replies.
1312 Instead it is used to synthesize the shadow.byname table, should it be
1313 missing. This is a useful mode in some installations involving Solaris.
1314 Implemented by Ulrich Drepper.
1316 * New locales: kok_IN, sq_MK, cv_RU
1320 * The following bugs are resolved with this release:
1322 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1323 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1324 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1325 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1326 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1327 10789, 10817, 10823, 10840, 10847
1329 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1331 Implemented by Ulrich Drepper.
1333 * Checking version of longjmp added that fails if an uninitialized stack
1334 frame would be created. Implemented by Ulrich Drepper.
1336 * STT_GNU_IFUNC is now supported in static executables.
1337 Implemented by H.J. Lu.
1339 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1341 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1342 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1343 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1344 Contributed by H.J. Lu.
1346 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1347 Implemented by Ulrich Drepper.
1349 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1351 Contributed by H.J. Lu.
1353 * Support for fma instruction in AVX on x86-64.
1354 Implemented by H.J. Lu and Ulrich Drepper.
1356 * AVX support in x86-64 auditing support in ld.so.
1357 Implemented by H.J. Lu.
1359 * STB_GNU_UNIQUE support added.
1360 Implemented by Ulrich Drepper.
1362 * Implement second fallback mode for optimized DNS lookup for even more
1363 broken environments. If two requests from the same port are not
1364 handled correctly close the socket and open a new one before sending
1365 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1366 can be used to select this mode right away, instead of rediscovering the
1367 necessity is every process again.
1368 Implemented by Ulrich Drepper.
1370 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1371 Implemented by Adam Tkac.
1373 * Optimized iconv conversions for S390x.
1374 Implemented by Andreas Krebbel.
1376 * Using condvars with PI mutexes is now more efficient due to kernel
1377 support for requeueing to PI futexes. NPTL support added for x86-64.
1378 Implemented by Ulrich Drepper.
1380 * New locales: ps_AF, my_MM
1384 * The following bugs are resolved with this release:
1386 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1387 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1388 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1389 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1390 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1392 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1393 Implemented by Ulrich Drepper.
1395 * New Linux interfaces: accept4, fallocate, fallocate64.
1396 Implemented by Ulrich Drepper.
1398 * Correct declarations of string function when used in C++ code. This
1399 could lead to compile errors for invalid C++ code.
1401 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1404 * New POSIX 2008 interface: psiginfo
1405 Implemented by Ulrich Drepper.
1407 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1408 Implemented by Ulrich Drepper.
1410 * Support for selecting between multiple function definitions at runtime
1411 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1413 * The libcrypt library can now use the hash function implementations in
1414 NSS. Implemented by Ulrich Drepper.
1416 * The malloc implementation can be compiled to be less memory efficient
1417 but higher performing in multi-threaded programs.
1418 Implemented by Ulrich Drepper.
1420 * New locales: nan_TW@latin, ks_IN
1422 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1423 Implemented by Ulrich Drepper.
1425 * Extended printf hook support. It is possible to use user-defined types
1426 and extend existing format specifiers.
1427 Implemented by Ulrich Drepper.
1429 * Handling for group shadow files has been added.
1430 Implemented by Ulrich Drepper.
1432 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1433 servers (the case, e.g., for some people using the built-in DNS
1434 server in ADSL modems/routers). There is a once-per-process timeout
1435 in case of a broken server. To avoid it, users can run nscd or put
1436 'options single-request' in /etc/resolv.conf.
1437 Implemented by Ulrich Drepper.
1441 * The following bugs are resolved with this release:
1443 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1444 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1445 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1446 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1447 6968, 6974, 6980, 6995, 7008, 7009, 7029
1449 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1450 up at the same time. Implemented by Ulrich Drepper.
1452 * TLS descriptors for LD and GD on x86 and x86-64.
1453 Implemented by Alexandre Oliva.
1455 * getaddrinfo now handles DCCP and UDPlite.
1456 Implemented by Ulrich Drepper.
1458 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1459 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1460 Implemented by Ulrich Drepper.
1462 * New implementation of memmem, strstr, and strcasestr which is O(n).
1463 Implemented by Eric Blake.
1465 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1467 * Implement "e" option for popen to open file descriptor with the
1468 close-on-exec flag set. Implemented by Ulrich Drepper.
1470 * Implement "b" mode for fmemopen. In this mode writes writes don't
1471 implicitly add a NUL byte and seeks from the end of the buffer really
1472 use the buffer end, not the string length as the basis.
1473 Implemented by Ulrich Drepper.
1475 * Many functions, exported and internal, now atomically set the close-on-exec
1476 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1478 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1480 Implemented by Pravin Satpute.
1482 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1486 * The following bugs are resolved with this release:
1488 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1489 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1490 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1491 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1492 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1493 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1494 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1496 * New locales: bo_CN, bo_IN, shs_CA.
1498 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1500 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1501 Implemented by Pravin Satpute.
1503 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1505 * nscd caches now all timeouts for DNS entries
1506 Implemented by Ulrich Drepper.
1508 * nscd is more efficient and wakes up less often.
1509 Implemented by Ulrich Drepper.
1511 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1512 vdprintf, and obstack_vprintf.
1513 Implemented by Jakub Jelinek.
1515 * Faster memset for x86-64.
1516 Implemented by Harsha Jagasia and H.J. Lu.
1518 * Faster memcpy on x86.
1519 Implemented by Ulrich Drepper.
1521 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1522 Implemented by Ulrich Drepper.
1524 * Faster sqrt and sqrtf implemention for some PPC variants.
1525 Implemented by Steven Munroe.
1529 * The following bugs are resolved with this release:
1531 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1532 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1533 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1534 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1535 5071, 5103, 5104, 5112, 5113, 5184, 5186
1537 * More checking functions: fread, fread_unlocked, open*, mq_open.
1538 Implemented by Jakub Jelinek and Ulrich Drepper.
1540 * Extend fortification to C++. Implemented by Jakub Jelinek.
1542 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1543 by not recognizing 'a' as a modifier when those specs are requested.
1544 Implemented by Jakub Jelinek.
1546 * PPC optimizations to math and string functions.
1547 Implemented by Steven Munroe.
1549 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1550 options to be passed. Implemented by Ulrich Drepper.
1552 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1554 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1555 Implemented by Ulrich Drepper.
1557 * Handle private futexes in the NPTL implementation.
1558 Implemented by Jakub Jelinek and Ulrich Drepper.
1560 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1561 Implemented by Roland McGrath and Ulrich Drepper.
1563 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1565 * SHA-256 and SHA-512 based password encryption.
1566 Implemented by Ulrich Drepper.
1568 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1569 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1572 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1573 Implemented by Ulrich Drepper.
1577 * The following bugs are resolved with this release:
1579 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1580 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1581 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1582 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1583 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1584 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1585 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1588 * New Linux interfaces: epoll_pwait, sched_getcpu.
1590 * New generic interfaces: strerror_l.
1592 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1596 * The following bugs are resolved with this release:
1598 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1599 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1600 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1601 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1602 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1603 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1604 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1605 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1606 3225, 3251, 3252, 3253, 3273
1608 * For Linux, the sorting of addresses returned by getaddrinfo now also
1609 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1610 Implemented by Ulrich Drepper.
1612 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1613 Implemented by Ulrich Drepper.
1615 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1617 * New iconv module for MIK. Contributed by Alexander Shopov.
1619 * For sites with broken group and/or passwd database, the auto-propagate
1620 option of nscd can prevent creating ID lookup entries from the results
1621 of a name lookup and vice versa. This usually is no problem but some
1622 site might have problems with the default behavior.
1623 Implemented by Ulrich Drepper.
1625 * Iterating over entire database in NIS can be slow. With the
1626 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1627 to trade time for memory. The entire database will be read at once.
1628 Implemented by Ulrich Drepper.
1630 * The interfaces introduced in RFC 3542 have been implemented by
1633 * Support for the new ELF hash table format was added by Ulrich Drepper.
1635 * Support for priority inheritance mutexes added by Jakub Jelinek and
1638 * Support for priority protected mutexes added by Jakub Jelinek.
1640 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1641 or_IN, csb_PL, fy_NL, sr_ME.
1645 * More overflow detection functions.
1647 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1648 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1650 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1651 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1652 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1653 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1654 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1655 by Masahide Washizawa.
1657 * It is now possible to install audit libraries for the dynamic linker using
1658 LD_AUDIT. Implemented by Ulrich Drepper.
1660 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1661 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1662 For a libc and libpthread that works well on Linux 2.4 kernels, we
1663 recommend using the stable 2.3 branch.
1665 * The new function open_wmemstream acts like open_memstream,
1666 but uses a wchar_t wide character buffer.
1668 * The new function ppoll is an improved version of poll, similar to pselect.
1670 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1671 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1672 renameat, unlinkat, linkat, symlinkat, readlinkat.
1674 * New Linux kernel system calls: unshare,
1675 inotify_init, inotify_add_watch, inotify_rm_watch.
1677 * The euidaccess function is now also known by the alias eaccess,
1678 for compatibility with some other systems.
1680 * Timezone data updated to 2006b version.
1684 * The following bugs are resolved with this release:
1686 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1687 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1688 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1689 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1690 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1691 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1693 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1695 * As of this release, GCC 4 can be used to compile the C Library.
1697 * Timezone data updated to 2005m version.
1701 * The following bugs are resolved with this release:
1703 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1704 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1705 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1706 777, 787, 821, 822, 823, 825
1708 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1712 * Support for RFC 3678. Real implementations exist only for Linux so far.
1713 Implemented by Ulrich Drepper.
1715 * nscd can now cache entries persistently. Expiring entries are reloaded.
1716 For speedups the cache can be shared in memory with client processes.
1717 Implemented by Ulrich Drepper.
1719 * nscd can now perform SELinux checks.
1720 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1722 * getaddrinfo queries are now cached. Canonical name lookup is performed
1724 Implemented by Ulrich Drepper.
1726 * The nothrow function attribute is used when headers are used by gcc when
1727 compiling C code. This can avoid significant amounts of exception
1730 * The malloc functions perform more error checking and are stricter when
1731 it comes to reacting on errors. The default action is to terminate
1732 the process after showing an error message. Implemented by Ulrich Drepper.
1734 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1735 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1737 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1738 namespaces using the new function dlmopen(). This feature is of course,
1739 like most other dynamic loading functionality, not available in statically
1740 linked applications. Implemented by Ulrich Drepper.
1742 * Low-overhead boundary checking variants of string and some stdio functions
1743 were added. These are to be used in conjunction with a gcc patch by
1744 Jakub Jelinek which adds calls to these functions if possible.
1745 Implemented by Jakub Jelinek and Ulrich Drepper.
1747 * Old code for several operating systems and machine architectures that
1748 have not been in working condition in a long time have been removed from
1749 the main source tree maintained by the GNU C Library's maintainers.
1750 These files are now reside in the separate `ports' source module
1751 that is usable as an add-on when building the library.
1755 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1756 interrogate the dynamic linker, compatible with the Solaris interface.
1758 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1759 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1761 * getifaddrs now uses the netlink interface on Linux to get its information.
1762 Implemented by Thorsten Kukuk.
1764 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1765 Implemented by Ulrich Drepper.
1767 * support for non-executable stacks on x86 has been added. Changes mostly
1770 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1773 * getaddrinfo now performs destination address selection according to
1778 * Thread-safe interfaces for many functions that access locale data
1779 were added in version 2.3, but these features were omitted from NEWS.
1780 Many functions have variants with an `_l' suffix that take a `locale_t'
1781 object as a parameter rather than consulting the current locale.
1782 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1783 create and maintain `locale_t' objects. Additionally, the new function
1784 `uselocale' sets "the current locale" (as used by functions not so
1785 parameterized) set for an individual thread. These features were added
1786 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1788 * The functions getresuid, getresgid, setresuid, and setresgid, which
1789 have long been available on Linux, are now declared in <unistd.h>
1790 and are now also available on the Hurd.
1792 * ELF thread-local storage support (TLS) now works on x86-64.
1794 * The new dynamic string token $LIB is expanded in shared library names.
1795 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1797 * Aldy Hernandez contributed complete software floating point support for
1798 PowerPC machines with no FPU.
1800 * fexecve is implemented on Linux.
1802 * The `btowc' function should work at least twice as fast due to
1803 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1805 * With approriate thread add-ons cancelable functions are now implemented
1806 in libc.so as well. No need to call the function in libpthread. This
1807 change allowed to finally disable the incorrect and expensive handling
1808 of weak definition in ld.so.
1810 * Yet more PLT entries in libc.so have been removed. We finally arrived
1811 at the bare minimum. Startup times improved appropriately.
1813 * Support for the new Linux/x86 system call interface was added. The
1814 AT_SYSINFO auxiliary vector entry is recognized and handled.
1818 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1821 * iconv (the program and the interface) now accepts empty names (excluding
1822 options like //TRANSLIT) to mean "use charset of current locale".
1824 * localedef can now transliterate characters in strings which are not in
1825 the provided charmap. The information from the input locale is used.
1827 * Prelinking support was added for ELF targets. This requires additional
1828 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1830 * Read-only stdio streams now use mmap to speed up operation by eliminating
1831 copying and buffer underflows. To use add 'm' to the mode string of
1832 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1834 * The malloc functions were completely rewritten by Wolfram Gloger based
1835 on Doug Lea's malloc-2.7.0.c.
1837 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1838 implementation of regex.
1840 * Bruno Haible upgraded the iconv and locale implementation to support
1843 * Contents of the LC_* and LANG environment variables in the CEN style are
1844 not recognized anymore. It never was used. Change by Ulrich Drepper.
1846 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1847 thread-local storage (TLS) ABI on some platforms.
1848 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1850 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1851 EUC-JISX0213, and TSCII.
1853 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1854 BSD-compatible interface for getting all network interface addresses.
1855 Implementation for IPv4 by Roland McGrath.
1857 * Loading of locale data is faster due to the introduction of a locale
1858 archive. Implemented by Roland McGrath and Ulrich Drepper.
1860 * Startup times are significantly reduced by not using exported functions
1861 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1864 * Steven Munroe contributed a port to PowerPC64/Linux.
1868 * The Hurd now uses the GNU libio implementation of stdio rather than the
1869 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1871 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1872 with the same behavior as the Linux system call of the same name.
1876 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1877 128-bit long double format.
1879 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1880 IBM1161, and IBM1162 charsets.
1882 * Andreas Jaeger contributed a port to x86-64/Linux.
1884 * Peter Bruin contributed a port to PowerPC/Hurd.
1886 * libc functions using I/O streams now can handle wide-oriented streams
1889 * optimizations in the dynamic linker. Binaries created by recent binutils
1890 versions start up quicker due to reduced time spent on relocations.
1892 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1896 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1897 asinh, atanh, j0 for the 128-bit long double format.
1899 * Bruno Haible updated all the code handling Unicode in some form to
1900 support Unicode 3.1.
1902 * Speed of regex for single-byte locales is back to previous levels.
1903 Patch by Isamu Hasegawa.
1905 * Alpha, SPARC, and IA-64 now also using floating stacks.
1907 * Startup time of internationalized applications greatly improved through
1908 iconv cache. Use iconvconfig to generate the cache file.
1909 Contributed by Ulrich Drepper.
1911 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1912 severe performance problems. Patch by David Mosberger.
1914 * The Hurd port got a lot more functionality like AIO, various stdio
1915 extensions, etc. Mainly done by Roland McGrath.
1917 * mtrace can now lookup symbols in shared libraries.
1921 * Intel's IA-64 math library is largely integrated. It provides fast and
1922 accurate implementatations for most basic and standard math functions
1923 in float, double, and long double format.
1925 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1926 and asin for the 96-bit long double format and asin, log, tan for the
1927 128-bit long double format.
1929 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1930 The basic double functions exist today. Contributed by Abraham Ziv
1931 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1932 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1934 * An asynchronous name lookup library was added. The interface is designed
1935 after POSIX AIO. The proposal was circulated beforehand to get comments.
1936 No negative ones came in. Implemented by Ulrich Drepper.
1938 * Port to S390/64bit contributed by Martin Schwidefsky
1939 <schwidefsky@de.ibm.com>.
1941 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1942 of functions for Linux/IA-64.
1944 * The RPC code is now thread safe. Threads can now use the same service
1945 of different services at the same time. Patch by Eric Norum
1946 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1948 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1949 family of functions for Linux/S390.
1951 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1952 of functions for Linux/x86.
1954 * Port to Linux/CRIS contributed by Axis Communications.
1958 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1959 we can now check for namespace violations and missing declarations. The
1960 result is that almost all headers are now Unix-compliant (as defined in
1961 the upcoming XPG6). The negative side is that some programs might need
1962 corrections, too, if they depend on the incorrect form of the headers in
1963 previous versions which defined too many symbols and included too many
1966 * regex now handles multibyte character sets correctly.
1967 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1969 * iconv (the program) does now conform to the upcoming XPG6 and handles
1970 charmaps. Instead of the charset names the path of charmaps can be
1971 provided and the conversion happens based on this data.
1972 Contributed by Ulrich Drepper.
1974 * The locale program now provides detailed information about the installed
1979 only lists the names of the supported locales
1983 provides details such as country, language, and codeset name.
1984 Contributed by Ulrich Drepper.
1988 * The gencat program now parses the input file according to the charset
1989 selected by the LC_CTYPE category. This is important for stateful
1990 character sets. To make generating catalogs easier there is a way
1991 to overwrite the charset selected by the locale: before the first
1992 message or $ quote line the catalog can contain a line like
1994 $ codeset=ISO-8859-2
1996 to select the charset (ISO-8859-2 in this case).
1998 Implemented by Shinya Hanataka and Ulrich Drepper.
2000 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
2001 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
2002 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
2004 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
2005 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
2007 * The LANGUAGE environment variable is now ignored unless the locale is
2008 changed from the default "C" locale.
2010 * The usual bug fixes.
2014 * Greg McGary added runtime support for bounds checking using gcc's
2015 new -fbounded-pointers option. ix86 target is complete. PowerPC
2018 * Thorsten Kukuk added secure mode support to nscd.
2020 * The Berkeley db libraries have been removed.
2022 Related, the nss_db module is now in a separate package since it
2023 obviously requires a database library being available.
2025 * Wide character I/O streams implemented by Ulrich Drepper.
2027 * Functions from the extended socket API added by Ulrich Drepper.
2029 * Functions feenableexcept and fedisableexcept to control the
2030 behaviour of individual exceptions have been added by Andreas Jaeger.
2032 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
2034 * The resolver code has been updated from bind 8.2.3-T5B which supports
2035 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
2038 This change could in some situations effect backward compatibility. Since
2039 now `_res' is a thread-local instead of a global variable, modifying it
2040 in one thread does not have any effect in other threads.
2042 The resolver library was also extended to allow IPv6 as the transport
2043 protocol for the requests. This work was done by Stig Venaas.
2045 * Compatibility code for K&R C compilers has been removed from the
2046 header files. A ISO C compiler is needed to use the library
2047 (conforming to either C89 or C99 standard).
2049 * Complete rewrite of the localedef program to support multibyte character
2050 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
2051 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
2052 Implemented by Ulrich Drepper.
2054 Bruno Haible significantly improved the generation and use of the data
2055 structures for the wide character tables.
2057 * Plural handling in gettext implemented by Ulrich Drepper.
2059 * The utmp daemon has been removed.
2061 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2063 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2066 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2068 * POSIX barriers implemented by Kaz Kylheku.
2070 * POSIX spawn function family implemented by Ulrich Drepper.
2072 * POSIX spinlocks are now available.
2074 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2076 * the configure option --enable-kernel=X.Y.Z allows to strip out
2077 compatibility for kernel versions before X.Y.Z. This is currently only
2078 implemented for Linux.
2080 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2081 field sin6_scope_id. This means that all programs using IPv6 should be
2082 recompiled. Don't expect binary compatibility with previous glibc
2085 * various conversion modules for IBM character sets contributed by
2088 * IA-64 port by Jes Sorensen and HJ Lu.
2102 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2104 * New xdr functions are added; some rpc functions are now 64bit clean.
2106 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2108 * Fixed known incompatibilities with glibc 2.0.
2110 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2112 * Optimized a number of functions (especially the ELF dynamic loader).
2114 * Update timezone data files.
2116 * lots of charmaps corrections
2118 * some new locale definitions and charmaps
2123 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2124 conform to POSIX member type requirements. Symbol versions have been
2125 adjusted as needed within the library, and for direct use by applications,
2126 but there is potential for problems if third-party libraries use
2127 struct timeval as part of their interface. This does not present
2128 a problem for X and other "essential" system libraries.
2130 * An additional locale model to support C++ Standard Library locale
2131 model and probably more was implemented by Ulrich Drepper.
2133 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2136 * Miles Bader provided the `argp' function family to support hierachical
2137 command line argument parsing, layered on top of getopt.
2139 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2141 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2144 * scanf recognizes the %a and %A format for scanning floating point numbers.
2146 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2147 information and interfaces for the available integer types.
2149 * about 130 new math functions were added to implement the ISO C9x math
2152 * the new header <complex.h> contains definitions of the complex math
2153 functions from ISO C 9X.
2155 * the new header <tgmath.h> defines generic macros to use complex or
2156 real valued functions.
2158 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2160 * Andreas Jaeger provided a test suite for the math library.
2162 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2164 * Ulrich Drepper added character set conversion functions (iconv).
2166 * Optimized string functions have been added.
2168 * The localedata addon is now part of glibc.
2170 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2172 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2173 daemon for NSS (nscd).
2175 Missing a better place here are some numbers on improvements. Under
2176 Linux 2.1.125 un-tar-ing the kernel sources takes
2180 using local files 12.19s 6.88s 22.91s
2182 using NIS 13.92s 8.91s 26.34s
2184 using NIS & nscd 10.37s 7.34s 25.30s
2186 using NIS+ 27.57s 30.37s 640.46s
2188 using NIS+ & nscd 10.25s 7.83s 26.51s
2190 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2192 Keep in mind that non-namelookup related operations dominate above times.
2193 It was just a common complain that using NIS+ unpacking the kernel is
2196 [1] The old nscd implementation is not available anymore since it was
2197 distributed with glibc up to version 2.0.98 and thus is now replaced.
2199 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2201 * Mark Kettenis provided a Hesiod NSS module.
2203 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2204 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2206 * rcmd can now handle netgroups (Dick Streefland).
2208 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2211 * Support for the IPv6 protocol has been added to the socket API, as per the
2212 latest draft standards.
2214 * Support for Linux 2.2 has been added.
2216 * Interface changes relative to the latest 2.0.x release:
2217 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2218 addseverity NEW: Unix98
2219 alphasort64 NEW: LFS
2220 argp_err_exit_status NEW: argp, GNU ext
2221 argp_error NEW: argp, GNU ext
2222 argp_failure NEW: argp, GNU ext
2223 argp_help NEW: argp, GNU ext
2224 argp_parse NEW: argp, GNU ext
2225 argp_program_bug_address NEW: argp, GNU ext
2226 argp_program_version NEW: argp, GNU ext
2227 argp_program_version_hook NEW: argp, GNU ext
2228 argp_state_help NEW: argp, GNU ext
2229 argp_usage NEW: argp, GNU ext
2230 authdes_create NEW: Secure RPC
2231 authdes_getucred NEW: Secure RPC
2232 authdes_pk_create NEW: Secure RPC
2233 backtrace NEW: GNU ext.
2234 backtrace_symbols NEW: GNU ext.
2235 backtrace_symbols_fd NEW: GNU ext.
2237 cacosf NEW: ISO C 9x
2238 cacosh NEW: ISO C 9x
2239 cacoshf NEW: ISO C 9x
2240 cacoshl NEW: ISO C 9x
2241 cacosl NEW: ISO C 9x
2248 casinf NEW: ISO C 9x
2249 casinh NEW: ISO C 9x
2250 casinhf NEW: ISO C 9x
2251 casinhl NEW: ISO C 9x
2252 casinl NEW: ISO C 9x
2254 catanf NEW: ISO C 9x
2255 catanh NEW: ISO C 9x
2256 catanhf NEW: ISO C 9x
2257 catanhl NEW: ISO C 9x
2258 catanl NEW: ISO C 9x
2259 cbc_crypt NEW: Secure RPC
2263 ccoshf NEW: ISO C 9x
2264 ccoshl NEW: ISO C 9x
2270 cimagf NEW: ISO C 9x
2271 cimagl NEW: ISO C 9x
2272 clearerr_locked REMOVED
2273 clntunix_create NEW: sunrpc ext
2275 clog10 NEW: ISO C 9x
2276 clog10f NEW: ISO C 9x
2277 clog10l NEW: ISO C 9x
2287 cprojf NEW: ISO C 9x
2288 cprojl NEW: ISO C 9x
2290 crealf NEW: ISO C 9x
2291 creall NEW: ISO C 9x
2296 csinhf NEW: ISO C 9x
2297 csinhl NEW: ISO C 9x
2300 csqrtf NEW: ISO C 9x
2301 csqrtl NEW: ISO C 9x
2305 ctanhf NEW: ISO C 9x
2306 ctanhl NEW: ISO C 9x
2308 des_setparity NEW: Secure RPC
2309 ecb_crypt NEW: Secure RPC
2310 endutxent NEW: Unix98
2312 exp10f NEW: ISO C 9x
2313 exp10l NEW: ISO C 9x
2317 fattach NEW: STREAMS
2318 fdetach NEW: STREAMS
2322 feclearexcept NEW: ISO C 9x
2323 fegetenv NEW: ISO C 9x
2324 fegetexceptflag NEW: ISO C 9x
2325 fegetround NEW: ISO C 9x
2326 feholdexcept NEW: ISO C 9x
2328 feraiseexcept NEW: ISO C 9x
2329 ferror_locked REMOVED
2330 fesetenv NEW: ISO C 9x
2331 fesetexceptflag NEW: ISO C 9x
2332 fesetround NEW: ISO C 9x
2333 fetestexcept NEW: ISO C 9x
2334 feupdateenv NEW: ISO C 9x
2335 fflush_locked REMOVED
2339 fgets_unlocked NEW: GNU ext.
2340 fileno_locked REMOVED
2352 fputc_locked REMOVED
2353 fputs_unlocked NEW: GNU ext.
2354 fread_unlocked NEW: GNU ext.
2359 fstatvfs NEW: Unix98
2363 ftruncate64 NEW: LFS
2365 fwrite_unlocked NEW: GNU ext.
2366 gai_strerror NEW: IPv6
2370 getchar_locked REMOVED
2372 getdate_err NEW: Unix98
2373 getdate_r NEW: GNU ext.
2375 getnameinfo NEW: IPv6
2376 getnetname NEW: Secure RPC
2377 getpmsg NEW: STREAMS
2378 getpt NEW: Unix98 PTY
2379 getrlimit64 NEW: LFS
2380 getutxent NEW: Unix98
2381 getutxid NEW: Unix98
2382 getutxline NEW: Unix98
2383 glob64 NEW: GNU ext.
2384 globfree64 NEW: GNU ext.
2385 gnu_get_libc_release NEW: GNU ext.
2386 gnu_get_libc_version NEW: GNU ext.
2387 grantpt NEW: Unix98 PTY
2388 host2netname NEW: Secure RPC
2390 iconv_close NEW: iconv
2391 iconv_open NEW: iconv
2392 if_freenameindex NEW: IPv6
2393 if_indextoname NEW: IPv6
2394 if_nameindex NEW: IPv6
2395 if_nametoindex NEW: IPv6
2396 in6addr_any NEW: IPv6
2397 in6addr_loopback NEW: IPv6
2398 inet6_isipv4mapped NEW: IPv6
2399 isastream NEW: STREAMS
2400 iswblank NEW: GNU ext.
2401 key_decryptsession NEW: Secure RPC
2402 key_decryptsession_pk NEW: Secure RPC
2403 key_encryptsession NEW: Secure RPC
2404 key_encryptsession_pk NEW: Secure RPC
2405 key_gendes NEW: Secure RPC
2406 key_get_conv NEW: Secure RPC
2407 key_secretkey_is_set NEW: Secure RPC
2408 key_setnet NEW: Secure RPC
2409 key_setsecret NEW: Secure RPC
2410 llrint NEW: ISO C 9x
2411 llrintf NEW: ISO C 9x
2412 llrintl NEW: ISO C 9x
2413 llround NEW: ISO C 9x
2414 llroundf NEW: ISO C 9x
2415 llroundl NEW: ISO C 9x
2420 lrintf NEW: ISO C 9x
2421 lrintl NEW: ISO C 9x
2422 lround NEW: ISO C 9x
2423 lroundf NEW: ISO C 9x
2424 lroundl NEW: ISO C 9x
2426 makecontext NEW: Unix98
2427 mempcpy NEW: GNU ext.
2430 modify_ldt NEW: kernel
2434 nearbyint NEW: ISO C 9x
2435 nearbyintf NEW: ISO C 9x
2436 nearbyintl NEW: ISO C 9x
2437 netname2host NEW: Secure RPC
2438 netname2user NEW: Secure RPC
2439 nexttoward NEW: ISO C 9x
2440 nexttowardf NEW: ISO C 9x
2441 nexttowardl NEW: ISO C 9x
2445 passwd2des NEW: Secure RPC
2447 pow10f NEW: GNU ext.
2448 pow10l NEW: GNU ext.
2451 printf_size NEW: GNU ext.
2452 printf_size_info NEW: GNU ext.
2453 profil_counter REMOVED
2454 pthread_mutexattr_getkind_np REPLACED
2455 pthread_mutexattr_setkind_np REPLACED
2456 ptsname NEW: Unix98 PTY
2457 ptsname_r NEW: Unix98 PTY
2459 putchar_locked REMOVED
2460 putgrent NEW: GNU ext.
2462 putpmsg NEW: STREAMS
2463 pututxline NEW: Unix98
2467 readdir64_r NEW: LFS
2468 remquo NEW: ISO C 9x
2469 remquof NEW: ISO C 9x
2470 remquol NEW: ISO C 9x
2472 roundf NEW: ISO C 9x
2473 roundl NEW: ISO C 9x
2475 scalbln NEW: ISO C 9x
2476 scalblnf NEW: ISO C 9x
2477 scalblnl NEW: ISO C 9x
2479 sendfile NEW: kernel
2480 setcontext NEW: Unix98
2481 setrlimit64 NEW: LFS
2482 setutxent NEW: Unix98
2484 sigignore NEW: Unix98
2485 sigqueue NEW: POSIX.1b
2486 sigrelse NEW: Unix98
2487 sigset NEW: POSIX.1b
2488 sigtimedwait NEW: POSIX.1b
2489 sigwaitinfo NEW: POSIX.1b
2490 sincos NEW: GNU ext.
2491 sincosf NEW: GNU ext.
2492 sincosl NEW: GNU ext.
2496 strcasestr NEW: GNU ext.
2497 strtoimax NEW: ISO C 9x
2498 strtoumax NEW: ISO C 9x
2499 strverscmp NEW: GNU ext.
2500 svcauthdes_stats NEW: Secure RPC
2501 svcunix_create NEW: sunrpc etx
2502 svcunixfd_create NEW: sunrpc ext
2503 swapcontext NEW: Unix98
2504 tcgetsid NEW: Unix98 PTY
2505 tdestroy NEW: GNU ext.
2506 tgamma NEW: ISO C 9x
2507 tgammaf NEW: ISO C 9x
2508 tgammal NEW: ISO C 9x
2512 truncf NEW: ISO C 9x
2513 truncl NEW: ISO C 9x
2515 unlockpt NEW: Unix98 PTY
2516 updwtmpx NEW: Unix98
2517 user2netname NEW: Secure RPC
2518 utmpxname NEW: Unix98
2519 versionsort NEW: GNU ext.
2520 versionsort64 NEW: GNU ext.
2522 wcscasecmp NEW: GNU ext.
2523 wcsncasecmp NEW: GNU ext.
2524 wcsnlen NEW: GNU ext.
2525 wcstoimax NEW: ISO C 9x
2526 wcstoll NEW: ISO C 9x
2527 wcstoull NEW: ISO C 9x
2528 wcstoumax NEW: ISO C 9x
2530 wordexp NEW: POSIX.2
2531 wordfree NEW: POSIX.2
2532 write_profiling REMOVED
2533 xdecrypt NEW: Secure RPC
2534 xdr_authdes_cred NEW: Secure RPC
2535 xdr_authdes_verf NEW: Secure RPC
2536 xdr_cryptkeyarg NEW: Secure RPC
2537 xdr_cryptkeyarg2 NEW: Secure RPC
2538 xdr_cryptkeyres NEW: Secure RPC
2539 xdr_getcredres NEW: Secure RPC
2540 xdr_key_netstarg NEW: Secure RPC
2541 xdr_key_netstres NEW: Secure RPC
2542 xdr_keybuf NEW: Secure RPC
2543 xdr_keystatus NEW: Secure RPC
2544 xdr_netnamestr NEW: Secure RPC
2545 xdr_sizeof NEW: Secure RPC
2546 xdr_unixcred NEW: sunrpc ext
2547 xencrypt NEW: Secure RPC
2548 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2559 * inet_ntoa is thread-safe
2561 * updwtmp is moved from libutil to libc
2563 * rewrite of cbrt function
2565 * update of timezone data
2579 * add atoll function
2581 * fix complex problems in Berkeley DB code
2583 * fix math functions
2587 * fixed lots of header problems (especially Linux/GNU specific)
2589 * dynamic loader preserves all registers
2591 * Roland McGrath provided support for handling of auxiliary objects in
2592 the ELF dynamic loader.
2594 * support for parallel builds is improved
2598 * GNU extensions are no longer declared by default. To enable them you
2599 must define the macro `_GNU_SOURCE' in your program or compile with
2602 * The library has changed from using GNU ld symbol aliases to using weak
2603 symbols where available. The ELF object file format supports weak
2604 symbols; GNU ld also supports weak symbols in the a.out format. (There
2605 is also now support for other GNU ld extensions in ELF. Use the
2606 `--with-elf' option to configure to indicate you have ELF, and
2607 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2608 of many files which contained only symbol aliases, reducing the size of
2609 the source and the compiled library; many other files were renamed to
2610 less cryptic names previously occupied by the symbol alias files.
2611 There is a new header file <elf.h> for programs which operate on
2612 files in the ELF format.
2614 * Converted to Autoconf version 2, so `configure' has more options.
2615 Run `configure --help' to see the details.
2617 * The library can now be configured to build profiling, highly-optimized
2618 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2619 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2620 `configure' enable building these extra libraries. The shared library is
2621 built by default when using both ELF and GNU ld. When shared libraries
2622 are enabled, the new library `-ldl' is available for arbitrary run-time
2623 loading of shared objects; its interface is defined in <dlfcn.h>. The
2624 new header file <link.h> gives access to the internals of the run-time
2625 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2626 application of same name on other systems and it provides information
2627 about dynamically linked binaries.
2629 * The C library now provides the run-time support code for profiling
2630 executables compiled with `-pg'. Programs can control the profiling code
2631 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2632 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2633 the support for this file format was contributed by David Mosberger-Tang.
2635 * The math code has been replaced with a math library based on fdlibm from
2636 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2637 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2638 functions. The math functions now reside in a separate library, so
2639 programs using them will need to use `-lm' their linking commands.
2641 * John C. Bowman contributed optimized ix87 assembler inline functions.
2643 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2644 mechanism similar to that found in Solaris 2. This is now used for the
2645 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2646 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2647 file controls what services are used for each individual database. This
2648 works by loading shared libraries with names specified in `nsswitch.conf',
2649 so service modules can be changed or added at any time without even
2650 relinking any program. Currently there are the file, db, and NIS based
2651 NSS services available.
2653 * The new functions `strtoq' and `strtouq' parse integer values from
2654 strings, like `strtol' and `strtoul', but they return `long long int' and
2655 `unsigned long long int' values, respectively (64-bit quantities).
2657 * The new functions `strtof' and `strtold' parse floating-point values from
2658 strings, like `strtod', but they return `float' and `long double' values,
2659 respectively (on some machines `double' and `long double' are the same).
2661 * Ulrich Drepper has contributed new implementations of the floating-point
2662 printing and reading code used in the `printf' family of functions and
2663 `strtod', `strtof', and `strtold'. These new functions are perfectly
2664 accurate, and much faster than the old ones.
2666 * The implementation of the POSIX locale model was completely rewritten by
2667 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2668 to compile the POSIX locale definition.
2670 * The former dummy implementations of the strcoll and strxfrm function are
2671 now replaced by fully functional code contributed by Ulrich Drepper. The
2672 collation information comes from the POSIX locale definitions.
2674 * The new header <langinfo.h> defines an interface for accessing
2675 various locale-dependent data (using the locale chosen with `setlocale').
2677 * Ulrich Drepper has contributed a new suite of functions for operation on
2678 wide-character and multibyte-character strings, in <wchar.h>;
2679 and classification and case conversion of wide characters, in <wctype.h>.
2680 These new functions are conforming to the ISO C, Amendement 1 specification.
2682 * There is now a second implementation of the standard I/O library available.
2683 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2684 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2686 * You can now use positional parameter specifications in format strings
2687 for the `printf' and `scanf' families of functions. For example,
2688 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2689 ``Number 6, Mr Jones''. This is mainly useful when providing different
2690 format strings for different languages, whose grammars may dictate
2691 different orderings of the values being printed. To support this
2692 feature, the interface for `register_printf_handler' has changed; see
2693 the header file <printf.h> for details.
2695 * The `printf' and `scanf' families of functions now understand a new
2696 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2697 to group numbers as indicated by the locale; for `scanf' and friends, this
2698 says to accept as valid only a number with all the proper grouping
2699 separators in the right places. In the default "C" locale, numbers are
2700 not grouped; but locales for specific countries will define the usual
2701 conventions (i.e. separate thousands with `,' in the US locale).
2703 * The pgrp functions have been regularized, slightly incompatibly but much
2704 less confusingly. The core functions are now `getpgid' and `setpgid',
2705 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2706 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2707 provided for compatibility. There is no longer an incompatible `getpgrp'
2708 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2710 * The new header file <fts.h> and suite of functions simplify programs that
2711 operate on directory trees. This code comes from 4.4 BSD.
2713 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2714 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2715 NSS scheme used in glibc.
2717 * There is a new malloc debugging hook `__memalign_hook'.
2719 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2720 `unsigned int' in <sys/types.h>. These are for compatibility only and
2721 their use is discouraged.
2723 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2724 done differently, so that it works even without GNU ld.
2726 * New function `euidaccess' checks allowed access to a file like `access',
2727 but using the effective IDs instead of the real IDs.
2729 * The time zone data files have been updated for the latest and greatest
2730 local time conventions of the countries of the world.
2732 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2735 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2736 for formatting floating-point numbers. They are provided only for
2737 compatibility; new programs should use `sprintf' instead. There are
2738 also equivalent function for the `long double' floating-point type and
2739 all functions also exist in a reentrant form.
2741 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2742 functions for maintaining the login-record files (primarily of use to
2743 system programs such as `login'), and convenient functions for
2744 allocating and initializing a pseudo-terminal (pty) device.
2746 * Ulrich Drepper has contributed new support for System V style
2747 shared memory and IPC on systems that support it.
2749 * Ulrich Drepper has contributed several miscellaneous new functions found
2750 in System V: The `hsearch' family of functions provide an effective
2751 implementation of hash tables; `a64l' and `l64a' provide a very simple
2752 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2755 * Ulrich Drepper has contributed new reentrant counterparts for the
2756 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2758 * Ulrich Drepper has contributed new, highly-optimized versions of several
2759 string functions for the i486/Pentium family of processors.
2761 * Ulrich Drepper has updated the Linux-specific code, based largely
2762 on work done in Hongjiu Lu's version of GNU libc for Linux.
2763 The GNU library now supports Linux versions 2.0.10 and later,
2764 using the ELF object file format (i[3456]86-*-linux).
2766 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2768 * David Mosberger-Tang and Richard Henderson have ported the C library
2769 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2770 dynamic linking support for ELF/Alpha.
2772 * Richard Henderson contributed several Alpha optimized assembler function
2773 for arithmetic and string handling.
2775 * Ulrich Drepper has contributed a new set of message catalog functions to
2776 support multiple languages using the <libintl.h> interface, for use with
2777 his new package GNU gettext. Translation volunteers have contributed
2778 catalogs of the library's messages in Spanish, German, and Korean.
2780 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2781 program and the `catgets' function for reading the catalog files it
2782 creates. (The <libintl.h> interface is preferred; we include the
2783 <nl_types.h> interface using `catgets' only for source compatibility with
2784 programs already written to use it.)
2786 * New header file <values.h> gives SVID-compatible names for <limits.h>
2789 * Various new macros, declarations, and small header files for compatibility
2792 * New function `group_member' is a convenient way to check if a process has
2793 a given effective group ID.
2795 * When using GCC 2.7 and later, the socket functions are now declared in a
2796 special way so that passing an argument of type `struct sockaddr_in *',
2797 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2798 `struct sockaddr *' type, does not generate a type-clash warning.
2800 * New function `error' declared in header file <error.h> is a convenient
2801 function for printing error messages and optionally exiting; this is the
2802 canonical function used in GNU programs. The new functions `err', `warn',
2803 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2804 doing the same thing.
2806 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2807 POSIX.2 `glob' function to do ~ and {...} expansion.
2809 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2810 `clearenv' which is used in POSIX.9 is also available.
2812 * New function `getsid' returns session ID number on systems that support it.
2814 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2815 files <db.h> and <mpool.h> provide a rich set of functions for several
2816 types of simple databases stored in memory and in files, and <ndbm.h> is
2817 an old `ndbm'-compatible interface using the `db' functions. Link with
2818 `-ldb' to get these functions.
2820 * New macro `strdupa' copies a string like `strdup', but uses local stack
2821 space from `alloca' instead of dynamic heap space from `malloc'.
2823 * New function `strnlen' is like `strlen' but searches only a given maximum
2824 number of characters for the null terminator. `stpncpy', `strndup' and
2825 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2828 * New function `statfs' in header <sys/statfs.h>.
2830 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2831 provide convenient functions for operating on blocks of null-terminated
2834 * A new suite of functions in <utmp.h> handle all the details of reading
2835 and writing the utmp file.
2837 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2840 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2841 completely POSIX compliant and also implemented the extended functionality
2842 to handle alternate digit representation and alternate era date formats.
2844 * Ulrich Drepper provided an implementation of the `strptime' function
2845 defined in XPG4.2 which transforms a string into a `struct tm' value.
2847 * Paul Eggert provided the tzselect shell script as part of the timezone
2848 code. The shell script makes it easy to select the correct timezone
2851 * The implementation of the malloc family of functions is completely replaced
2852 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2853 The implementation uses the mmap function (if available) and it is
2854 optimized for the use in multi threaded programs.
2856 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2857 functions. This new functionality is usable by specifying a special
2858 salt string and it is compatible with implementation on *BSD systems.
2860 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2861 `getsubopt' to handle second level command line options, `bsd_signal'
2862 to access BSD style `signal' functionality, the obsolete `regexp' style
2865 * the `lchown' function is available on system which support this
2868 * The implementation of the shadow password handling function was contributed
2871 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2873 * POSIX.1g support was added. The <sys/select.h> header is available,
2874 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2875 implementation of `getaddrinfo'.
2879 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2881 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2882 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2884 * The new function `daemon' from 4.4 BSD is useful for server programs that
2885 want to put themselves in the background.
2887 * Joel Sherrill has contributed support for several standalone boards that
2888 run without an operating system.
2890 * `printf', `scanf' and friends now accept a `q' type modifier for long
2891 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2893 * All of the code taken from BSD (notably most of the math and networking
2894 routines) has been updated from the BSD 4.4-Lite release.
2896 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2898 * The new functions `getdomainname' and `setdomainname' fetch or change the
2899 YP/NIS domain name. These are system calls which exist on systems which
2902 * The time zone data files have been updated for the latest international
2905 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2906 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2910 * The C library now includes support for Sun RPC, from Sun's free
2911 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2912 are included. (There is still no support for YP.)
2914 * Tom Quinn has contributed a port of the C library to SGI machines running
2915 Irix 4 (mips-sgi-irix4).
2917 * The new `lockf' function is a simplified interface to the locking
2918 facilities of `fcntl', included for compatibility.
2920 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2922 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2924 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2927 * The error message printed by `assert' for a failed assertion now includes
2928 the name of the program (if using GNU ld) and the name of the calling
2929 function (with versions of GCC that support this).
2931 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2933 * The library now includes the <sys/mman.h> header file and memory
2934 management functions `mmap', `munmap', `mprotect', `msync', and
2935 `madvise', on systems that support those facilities.
2937 * The interface for `mcheck' has changed slightly: the function called to
2938 abort the program when an allocation inconsistency is detected now takes
2939 an argument that indicates the type of failure. The new function
2940 `mprobe' lets you request a consistency check for a particular block at
2941 any time (checks are normally done only when you call `free' or `realloc'
2944 * It is now possible to easily cross-compile the C library, building on one
2945 system a library to run on another machine and/or operating system. All
2946 you need to do is set the variable `HOST_CC' in `configparms' to the
2947 native compiler for programs to run on the machine you are building on (a
2948 few generator programs are used on Unix systems); set `CC' to the
2951 * The new function `fexecve' (only implemented on the GNU system) executes
2952 a program file given a file descriptor already open on the file.
2956 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2957 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2959 * You can set the variable `libprefix' in `configparms' to specify a prefix
2960 to be prepended to installed library files; this makes it easy to install
2961 the GNU C library to be linked as `-lgnuc' or whatever.
2963 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2964 copies a limited number of characters from a string, and returns the
2965 address of the last character written.
2967 * You no longer need to check for whether the installed `stddef.h' is
2968 compatible with the GNU C library. configure now checks for you.
2970 * You can now define a per-stream `fileno' function to convert the
2971 stream's cookie into an integral file descriptor.
2973 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2974 allocates zero bytes of storage, and returns a unique pointer which
2975 you can pass to `realloc' or `free'. The behavior is undefined if
2976 you dereference this pointer.
2978 * The C library now runs on Sony NEWS m68k machines running either
2979 NewsOS 3 or NewsOS 4.
2981 * The new `syscall' function is a system-dependent primitive function
2982 for invoking system calls. It has the canonical behavior on Unix
2983 systems, including unreliable return values for some calls (such as
2984 `pipe', `fork' and `getppid').
2986 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2987 to `EAGAIN', which is the preferred name. On systems whose kernels
2988 use two distinct codes, the C library now translates EWOULDBLOCK to
2989 EAGAIN in every system call function.
2993 * The GNU C Library Reference Manual is now distributed with the library.
2994 `make dvi' will produce a DVI file of the printed manual.
2995 `make info' will produce Info files that you can read on line using C-h i
2996 in Emacs or the `info' program.
2997 Please send comments on the manual to bug-glibc-manual@gnu.org.
2999 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
3001 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
3003 * Jason Merrill has contributed a port to the Sequent Symmetry running
3004 Dynix version 3 (i386-sequent-dynix).
3006 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
3007 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
3009 * New function `memory_warnings' lets you arrange to get warnings when
3010 malloc is running out of memory to allocate, like Emacs gives you.
3012 * The C library now contains the relocating allocator used in Emacs 19 for
3013 its editing buffers. This allocator (ralloc) minimizes allocation
3014 overhead and fragmentation by moving allocated regions around whenever it
3015 needs to. You always refer to a ralloc'd region with a "handle" (a
3016 pointer to a pointer--an object of type `void **').
3018 * There is a new `printf' format: `%m' gives you the string corresponding
3019 to the error code in `errno'.
3021 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
3022 or `%[' conversion, but instead of filling in a fixed-sized buffer you
3023 pass, the `a' modifier says to fill in a `char **' you pass with a
3026 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
3027 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
3028 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
3030 * `mkstemp' is a traditional Unix function to atomically create and open a
3031 uniquely-named temporary file.
3035 * The standard location for the file that says what the local timezone is
3036 has changed again. It is now `/usr/local/etc/localtime' (or more
3037 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
3039 * The distribution no longer contains any files with names longer than 14
3042 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
3043 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
3045 * New functions `ttyslot' and `syslog' from 4.4 BSD.
3049 * The configuration process has changed quite a bit. The `configure'
3050 script is now used just like the configuration scripts for other GNU
3051 packages. The `sysdeps' directory hierarchy is much rearranged.
3052 The file `INSTALL' explains the new scheme in detail.
3054 * The header files no longer need to be processed into ANSI C and
3055 traditional C versions. There is just one set of files to install, and
3056 it will work with ANSI or old C compilers (including `gcc -traditional').
3058 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3059 MIPS DECStation running Ultrix 4.
3061 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3062 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3063 made itself into a shared library.
3065 * Yet further improved support for the i386, running 4.3 BSD-like systems
3066 (such as Mach 3 with the Unix single-server), or System V.
3068 * New function `strncasecmp' to do case-insensitive string comparison
3069 with limited length.
3071 * New function `strsep' is a reentrant alternative to `strtok'.
3073 * New functions `scandir' and `alphasort' for searching directories.
3075 * New function `setenv' is a better interface to `putenv'.
3077 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3078 function for traversing a directory tree.
3080 * The GNU obstack package is now also part of the C library.
3081 The new function `open_obstack_stream' creates a stdio stream that
3082 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3083 formatted output directly to an obstack.
3085 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3086 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3088 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3090 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3091 things to your strings.
3093 * There are some new test programs: test-fseek, testmb, and testrand.
3095 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3096 These ports are not finished, but are a good starting place for really
3097 supporting those systems.
3099 * `/etc/localtime' is now the standard location for the file that says what
3100 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3101 This follows the general principle that `/etc' is the place for all local
3102 configuration files.
3104 * The C library header files now use `extern "C"' when used by the C++
3105 compiler, so the C library should now work with C++ code.
3107 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3108 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3111 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3112 function which uses the `merge sort' algorithm, and is said to be
3113 significantly faster than the old GNU `qsort' function. Merge sort is
3114 now the standard `qsort' function. The new algorithm can require a lot
3115 of temporary storage; so, the old sorting function is called when the
3116 required storage is not available.
3118 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3119 provides the Unix `crypt' function, plus some other entry points.
3121 * The code and header files taken from 4.4 BSD have been updated with the
3122 latest files released from Berkeley.
3124 ----------------------------------------------------------------------
3125 Copyright information:
3127 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3129 Permission is granted to anyone to make or distribute verbatim copies
3130 of this document as received, in any medium, provided that the
3131 copyright notice and this permission notice are preserved,
3132 thus giving the recipient permission to redistribute in turn.
3134 Permission is granted to distribute modified versions
3135 of this document, or of portions of it,
3136 under the above conditions, provided also that they
3137 carry prominent notices stating who last changed them.
3140 version-control: never