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 * Unicode 8.0.0 Support: Character encoding, character type info, and
11 transliteration tables are all updated to Unicode 8.0.0, using new
12 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
13 These updates cause user visible changes, such as the fixes for bugs
16 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
17 kernel-internal CPU set size. This means that requests that change the
18 CPU affinity which failed before (for example, an all-ones CPU mask) will
19 now succeed. Applications that need to determine the effective CPU
20 affinities need to call sched_getaffinity or pthread_getaffinity_np after
21 setting it because the kernel can adjust it (and the previous size check
22 would not detect this in the majority of cases).
24 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
25 the following new symbols are used: fts64_children, fts64_close,
26 fts64_open, fts64_read and fts64_set.
28 * getaddrinfo now detects certain invalid responses on an internal netlink
29 socket. If such responses are received, an affected process will
30 terminate with an error message of "Unexpected error <number> on netlink
31 descriptor <number>" or "Unexpected netlink response of size <number> on
32 descriptor <number>". The most likely cause for these errors is a
33 multi-threaded application which erroneously closes and reuses the netlink
34 file descriptor while it is used by getaddrinfo.
36 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
37 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
38 unnecessary serialization of memory allocation requests across threads.
39 The defect is now corrected. Users should see a substantial increase in
40 the concurent throughput of allocation requests for applications which
41 trigger this bug. Affected applications typically create create and
42 destroy threads frequently. (Bug 19048 was reported and analyzed by
45 * There is now a --disable-timezone-tools configure option for disabling the
46 building and installing of the timezone related utilities (zic, zdump, and
47 tzselect). This is useful for people who build the timezone data and code
48 independent of the GNU C Library.
50 * The obsolete header <regexp.h> has been removed. Programs that require
51 this header must be updated to use <regex.h> instead.
53 * The obsolete functions bdflush, create_module, get_kernel_syms,
54 query_module and uselib are no longer available to newly linked binaries;
55 the header <sys/kdaemon.h> has been removed. These functions and header
56 were specific to systems using the Linux kernel and could not usefully be
57 used with the GNU C Library on systems with version 2.6 or later of the
60 * Optimized string, wcsmbs and memory functions for IBM z13.
61 Implemented by Stefan Liebler.
63 * Newly linked programs that define a variable called signgam will no longer
64 have it set by the lgamma, lgammaf and lgammal functions. Programs that
65 require signgam to be set by those functions must ensure that they use the
66 variable provided by the GNU C Library and declared in <math.h>, without
67 defining their own copy.
69 * The minimum GCC version that can be used to build this version of the GNU
70 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
71 still be used to compile programs using the GNU C Library.
73 Security related changes:
75 * An out-of-bounds value in a broken-out struct tm argument to strftime no
76 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
78 * The LD_POINTER_GUARD environment variable can no longer be used to disable
79 the pointer guard feature. It is always enabled. Previously,
80 LD_POINTER_GUARD could be used to disable security hardening in binaries
81 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
84 * An integer overflow in hcreate and hcreate_r could lead to an
85 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
87 * The catopen function no longer has unbounded stack usage. Reported by
90 * The nan, nanf and nanl functions no longer have unbounded stack usage
91 depending on the length of the string passed as an argument to the
92 functions. Reported by Joseph Myers. (CVE-2014-9761)
94 * A stack-based buffer overflow was found in libresolv when invoked from
95 libnss_dns, allowing specially crafted DNS responses to seize control
96 of execution flow in the DNS client. The buffer overflow occurs in
97 the functions send_dg (send datagram) and send_vc (send TCP) for the
98 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
99 family. The use of AF_UNSPEC triggers the low-level resolver code to
100 send out two parallel queries for A and AAAA. A mismanagement of the
101 buffers used for those queries could result in the response of a query
102 writing beyond the alloca allocated buffer created by
103 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
104 the overflow. Thanks to the Google Security Team and Red Hat for
105 reporting the security impact of this issue, and Robert Holiday of
106 Ciena for reporting the related bug 18665. (CVE-2015-7547)
108 The following bugs are resolved with this release:
110 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
111 [887] math: Math library function "logb" and "nextafter" inconsistent
112 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
113 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
114 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
115 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
117 [4404] localedata: German translation of "Alarm clock" is misleading
118 [6799] math: nextafter() and nexttoward() doen't set errno on
119 overflow/underflow errors
120 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
122 [10432] nis: _nss_nis_setnetgrent assertion failure
123 [11460] libc: fts has no LFS support
124 [12926] network: getaddrinfo()/make_request() may spin forever
125 [13065] nptl: Race condition in pthread barriers
126 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
127 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
129 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
130 [14912] libc: Rename non-installed bits/*.h headers
131 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
132 [15367] math: Let gcc use __builtin_isinf
133 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
134 [15421] math: lgamma wrongly sets signgam for ISO C
135 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
136 FE_INVALID with argument out of range
137 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
139 [15786] dynamic-link: ifunc resolver functions can smash function
141 [15918] math: Unnecessary check for equality in hypotf()
142 [16061] localedata: Review / update transliteration data
143 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
145 [16141] time: strptime %z offset restriction
146 [16171] math: drem should be alias of remainder
147 [16296] math: fegetround is pure?
148 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
149 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
151 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
152 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
154 [16422] math: [powerpc] math-float, math-double failing llrint tests with
155 "Exception "Inexact" set" on ppc32
156 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
157 [16517] math: Missing underflow exception from tanf/tan/tanl
158 [16519] math: Missing underflow exception from sinhf
159 [16520] math: Missing underflow exception from tanhf
160 [16521] math: Missing underflow exception from exp2
161 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
163 [16734] stdio: fopen calls mmap to allocate its buffer
164 [16961] math: nan function incorrect handling of bad sequences
165 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
166 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
167 [16985] locale: localedef: confusing error message when opening output
169 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
170 [17197] locale: Redundant shift character in iconv conversion output at
172 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
173 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
174 [17250] dynamic-link: static linking breaks nss loading
175 (getaddrinfo/getpwnam/etc...)
176 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
178 [17441] math: isnan() should use __builtin_isnan() in GCC
179 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
180 (related to lock elision)
181 [17787] manual: Exponent on page 324 of the PDF ends prematurely
182 [17886] time: strptime should be able to parse "Z" as a timezone with %z
183 [17887] time: strptime should be able to parse "+01:00" style timezones
184 [17905] libc: catopen() Multiple unbounded stack allocations
186 [18084] libc: backtrace (..., 0) dumps core on x86
187 [18086] libc: nice() sets errno to 0 on success
188 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
189 is too large (CVE-2015-8778)
190 [18251] dynamic-link: SONAME missing when audit modules provides path
191 [18265] libc: add attributes for wchar string and memory functions
192 [18370] math: csqrt missing underflows
193 [18421] libc: [hppa] read-only segment has dynamic relocations
194 [18472] libc: Obsolete syscall wrappers should be compat symbols
195 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
196 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
197 [18525] localedata: Remove locale timezone information
198 [18560] libc: [powerpc] spurious bits/ipc.h definitions
199 [18568] localedata: Update locale data to Unicode 8.0
200 [18589] locale: sort-test.sh fails at random
201 [18595] math: ctan, ctanh missing underflows
202 [18604] libc: assert macro-expands its argument
203 [18610] math: S390: fetestexcept() reports any exception if DXC-code
204 contains a vector instruction exception.
205 [18611] math: j1, jn missing errno setting on underflow
206 [18618] localedata: sync Chechen locale definitions with other *_RU
208 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
209 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
210 [18665] network: In send_dg, the recvfrom function is NOT always using the
211 buffer size of a newly created buffer (CVE-2015-7547)
212 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
214 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
216 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
217 [18699] math: tilegx cproj() for various complex infinities does not yield
219 [18724] libc: Harden put*ent functions against data injection
220 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
221 [18755] build: build errors with -DNDEBUG
222 [18757] stdio: fmemopen fails to set errno on failure
223 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
225 [18781] libc: openat64 lacks O_LARGEFILE
226 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
227 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
228 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
229 [18790] math: [ldbl-128ibm] tanhl inaccurate
230 [18795] libc: stpncpy fortification misses buffer lengths that are
232 [18796] build: build fails for --disable-mathvec
233 [18803] math: hypot missing underflows
234 [18820] stdio: fmemopen may leak memory on failure
235 [18823] math: csqrt spurious underflows
236 [18824] math: fma spurious underflows
237 [18825] math: pow missing underflows
238 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
239 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
240 [18870] build: sem_open.c fails to compile with missing symbol
242 [18872] stdio: Fix memory leak in printf_positional
243 [18873] libc: posix_fallocate overflow check ineffective
244 [18875] math: Excess precision leads incorrect libm
245 [18877] libc: arm: mmap offset regression
246 [18887] libc: memory corruption when using getmntent on blank lines
247 [18918] localedata: hu_HU: change time to HH:MM:SS format
248 [18921] libc: Regression: extraneous stat() and fstat() performed by
250 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
251 binaries (CVE-2015-8777)
252 [18951] math: tgamma missing underflows
253 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
255 [18953] localedata: lt_LT: change currency symbol to the euro
256 [18956] math: powf inaccuracy
257 [18961] math: [i386] exp missing underflows
258 [18966] math: [i386] exp10 missing underflows
259 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
260 [18969] build: multiple string test failures due to missing locale
262 [18970] libc: Reference of pthread_setcancelstate in libc.a
263 [18977] math: float / long double Bessel functions not in XSI POSIX
264 [18980] math: i386 libm functions return with excess range and precision
265 [18981] math: i386 scalb*, ldexp return with excess range and precision
266 [18982] stdio: va_list and vprintf
267 [18985] time: Passing out of range data to strftime() causes a segfault
269 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
270 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
271 [19012] locale: iconv_open leaks memory on error path
272 [19016] math: clog, clog10 inaccuracy
273 [19018] nptl: Mangle function pointers in tls_dtor_list
274 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
275 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
276 [19048] malloc: malloc: arena free list can become cyclic, increasing
278 [19049] math: [powerpc] erfc incorrect zero sign
279 [19050] math: [powerpc] log* incorrect zero sign
280 [19058] math: [x86_64] Link fail with -fopenmp and -flto
281 [19059] math: nexttoward overflow incorrect in non-default rounding modes
282 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
283 [19074] network: Data race in _res_hconf_reorder_addrs
284 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
285 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
286 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
288 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
290 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
291 [19086] manual: posix_fallocate64 documented argument order is wrong.
292 [19088] math: lround, llround missing exceptions close to overflow
294 [19094] math: lrint, llrint missing exceptions close to overflow threshold
295 [19095] math: dbl-64 lrint incorrect for 64-bit long
296 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
297 [19124] dynamic-link: ld.so failed to build with older assmebler
298 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
299 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
300 [19134] math: [powerpc32] lround, lroundf spurious exceptions
301 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
302 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
303 pthread_setaffinity_np
304 [19156] math: [ldbl-128] j0l spurious underflows
305 [19164] nptl: tst-getcpu fails with many possible CPUs
306 [19168] math: math/test-ildoubl and math/test-ldouble failure
307 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
308 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
310 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
311 (FE_NOMASK_ENV) do not clear SSE exceptions
312 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
313 _int_new_arena/reused_arena
314 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
315 [19201] math: dbl-64 remainder incorrect sign of zero result
316 [19205] math: bits/math-finite.h conditions do not match math.h and
318 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
319 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
320 for C99-based standards
321 [19212] libc: features.h not -Wundef clean
322 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
324 [19214] libc: Family and model identification for AMD CPU's are incorrect.
325 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
326 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
328 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
330 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
332 [19242] libc: strtol incorrect in Turkish locales
333 [19243] malloc: reused_arena can pick an arena on the free list, leading
334 to an assertion failure and reference count corruption
335 [19253] time: tzset() ineffective when temporary TZ did not include DST
337 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
338 [19270] math: [hppa] Shared libm missing __isnanl
339 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
340 MAP_HUGETLB and MAP_STACK defines
341 [19313] nptl: Wrong __cpu_mask for x32
342 [19347] libc: grantpt: try to force a specific gid even without pt_chown
343 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
344 [19350] math: [ldbl-128ibm] sinhl spurious overflows
345 [19351] math: [ldbl-128ibm] logl inaccurate near 1
346 [19363] time: x32: times() return value wrongly truncates/sign extends
348 [19367] dynamic-link: Improve branch prediction on Silvermont
349 [19369] network: Default domain name not reset by res_ninit when "search"
350 / "domain" entry is removed from resolv.conf
351 [19375] math: powerpc: incorrect results for POWER7 logb with negative
353 [19385] localedata: bg_BG: time separator should be colon, not comma
354 [19408] libc: linux personality syscall wrapper may erroneously return an
355 error on 32-bit architectures
356 [19415] libc: dladdr returns wrong names on hppa
357 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
358 IBM905, IBM907, and IBM909
359 [19439] math: Unix98 isinf and isnan functions conflict with C++11
360 [19443] build: build failures with -DDEBUG
361 [19451] build: Make check fails on test-double-vlen2
362 [19462] libc: Glibc failed to build with -Os
363 [19465] math: Wrong code with -Os
364 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
366 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
368 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
369 [19486] math: S390: Math tests fail with "Exception Inexact set".
370 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
371 [19550] libc: [mips] mmap negative offset handling inconsistent with other
373 [19590] math: Fail to build shared objects that use libmvec.so functions.
377 * The following bugs are resolved with this release:
379 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
380 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
381 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
382 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
383 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
384 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
385 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
386 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
387 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
388 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
389 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
390 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
391 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
392 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
393 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
394 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
395 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
396 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
397 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
398 18657, 18676, 18694, 18696, 18887.
400 * Cache information can be queried via sysconf() function on s390 e.g. with
401 _SC_LEVEL1_ICACHE_SIZE as argument.
403 * A buffer overflow in gethostbyname_r and related functions performing DNS
404 requests has been fixed. If the NSS functions were called with a
405 misaligned buffer, the buffer length change due to pointer alignment was
406 not taken into account. This could result in application crashes or,
407 potentially arbitrary code execution, using crafted, but syntactically
408 valid DNS responses. (CVE-2015-1781)
410 * The time zone file parser has been made more robust against crafted time
411 zone files, avoiding heap buffer overflows related to the processing of
412 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
413 large time zone data files. Overly long time zone specifiers in the TZ
414 variable no longer result in stack overflows and crashes.
416 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
417 for LD and GD on x86 and x86-64, has been implemented. You will need
418 binutils-2.24 or later to enable this optimization.
420 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
421 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
422 Hat). These updates cause user visible changes, such as the fix for bug
425 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
426 and getXXbyYY NSS calls for the same database, causing a denial-of-service
427 condition in some applications.
429 * Added vector math library named libmvec with the following vectorized x86_64
430 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
432 The library can be disabled with --disable-mathvec. Use of the functions is
433 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
434 Shared library libmvec.so is linked in as needed when using -lm (no need to
435 specify -lmvec explicitly for not static builds).
436 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
438 * A new fmemopen implementation has been added with the goal of POSIX
439 compliance. The new implementation fixes the following long-standing
440 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
441 old implementation is still present for use be by existing binaries.
443 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
444 releases. It has been fixed to match 2.19 and older, but binaries built
445 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
447 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
448 Contributed by Roland McGrath (Google).
450 * The header <regexp.h> is deprecated, and will be removed in a future
451 release. Use of this header will trigger a deprecation warning.
452 Application developers should update their code to use <regex.h> instead.
454 This header was formerly part of SUS, but was deprecated in 1994 and
455 removed from the standard in 2001. Also, the glibc implementation
456 leaks memory. See BZ#18681 for more details.
460 * The following bugs are resolved with this release:
462 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
463 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
464 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
465 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
466 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
467 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
468 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
469 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
470 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
471 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
474 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
475 too little memory for the to-be-scanned arguments and overflow the
476 allocated buffer. The implementation now correctly computes the required
477 buffer size when using malloc, and switches to malloc from alloca as
480 * A new semaphore algorithm has been implemented in generic C code for all
481 machines. Previous custom assembly implementations of semaphore were
482 difficult to reason about or ensure that they were safe. The new version
483 of semaphore supports machines with 64-bit or 32-bit atomic operations.
484 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
485 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
487 * Port to Altera Nios II has been contributed by Mentor Graphics.
489 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
490 implementations for powerpc64/powerpc64le.
491 Implemented by Adhemerval Zanella (IBM).
493 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
494 and powerpc64le. This may improve lock scaling of existing programs on
495 HTM capable systems. The lock elision code is only enabled with
496 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
497 powerpc will issue a transaction abort on every syscall to avoid side
498 effects being visible outside transactions.
500 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
501 AArch64. Contributed by ARM Ltd.
503 * i386 memcpy functions optimized with SSE2 unaligned load/store.
505 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
506 under certain input conditions resulting in the execution of a shell for
507 command substitution when the application did not request it. The
508 implementation now checks WRDE_NOCMD immediately before executing the
509 shell and returns the error WRDE_CMDSUB as expected.
511 * CVE-2012-3406 printf-style functions could run into a stack overflow when
512 processing format strings with a large number of format specifiers.
514 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
515 infinite loop if the DNS response contained a PTR record of an unexpected
518 * The minimum GCC version that can be used to build this version of the GNU
519 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
520 still be used to compile programs using the GNU C Library.
522 * The GNU C Library is now built with -Werror by default. This can be
523 disabled by configuring with --disable-werror.
525 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
527 * The obsolete sigvec function has been removed. This was the original
528 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
529 programs have been using instead for about 25 years. Of course, ABI
530 compatibility for old binaries using sigvec remains intact.
532 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
533 with newer versions of bison.
535 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
536 The original MIPS o32 hard-float ABI requires an FPU where double-precision
537 registers overlay two consecutive single-precision registers. MIPS32R2
538 introduced a new FPU mode (FR=1) where double-precision registers extend the
539 corresponding single-precision registers which is incompatible with the
540 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
541 require the use of FR=1 making a transition necessary. New o32 ABI
542 extensions enable users to migrate over time from the original o32 ABI
543 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
544 tracks the ABI of any loaded object and verifies that new objects are
545 compatible. Mode transitions will also be requested as required and
546 unsupportable objects will be rejected. The ABI checks include both soft and
547 hard float ABIs for o32, n32 and n64.
549 GCC 5 with GNU binutils 2.25 onwards:
550 It is strongly recommended that all o32 system libraries are built using the
551 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
552 with the original and all new o32 ABI extensions. Configure a MIPS GCC
553 compiler using --with-fp-32=xx to set this by default.
557 * The following bugs are resolved with this release:
559 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
560 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
561 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
562 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
563 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
564 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
565 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
566 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
567 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
568 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
569 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
570 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
571 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
572 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
573 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
575 * Reverted change of ABI data structures for s390 and s390x:
576 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
577 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
578 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
579 are preserved pointing straight to the same implementation as the old ones.
580 Given that, new callers will simply provide a too-big buffer to these
581 functions. Any applications/libraries out there that embed jmp_buf or
582 ucontext_t in an ABI-relevant data structure that have already been rebuilt
583 against 2.19 headers will have to rebuilt again. This is necessary in any
584 case to revert the breakage in their ABI caused by the glibc change.
586 * Support for file description locks is added to systems running the
587 Linux kernel. The standard file locking interfaces are extended to
588 operate on file descriptions, not file descriptors, via the use of
589 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
590 are associated with an open file instead of a process.
592 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
594 * The minimum Linux kernel version that this version of the GNU C Library
595 can be used with is 2.6.32.
597 * Running the testsuite no longer terminates as soon as a test fails.
598 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
599 with PASS or FAIL lines for individual tests. A summary of the results is
600 printed, including a list of failing lists, and "make check" exits with
601 error status if there were any unexpected failures. "make check
602 stop-on-test-failure=y" may be used to keep the old behavior.
604 * The am33 port, which had not worked for several years, has been removed
607 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
608 supported; they now act the same as _DEFAULT_SOURCE (but generate a
609 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
610 conflicted with POSIX (support for which was removed in 2.19), the
611 interfaces those macros enabled remain available when compiling with
612 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
615 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
617 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
618 This may improve lock scaling of existing programs on TX capable systems.
619 The lock elision code is only built with --enable-lock-elision=yes and
620 then requires a GCC version supporting the TX builtins. With lock elision
621 default mutexes are elided via __builtin_tbegin, if the cpu supports
622 transactions. By default lock elision is not enabled and the elision code
625 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
626 copy the path argument. This allowed programs to cause posix_spawn to
627 deference a dangling pointer, or use an unexpected pathname argument if
628 the string was modified after the posix_spawn_file_actions_addopen
631 * All supported architectures now use the main glibc sysdeps directory
632 instead of some being in a separate "ports" directory (which was
633 distributed separately before glibc 2.17).
635 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
636 On configurations that support it (all Linux configurations), it's now
637 used regardless of the --enable-add-ons switch to configure. It is no
638 longer possible to build such configurations without pthreads support.
640 * Locale names, including those obtained from environment variables (LANG
641 and the LC_* variables), are more tightly checked for proper syntax.
642 setlocale will now fail (with EINVAL) for locale names that are overly
643 long, contain slashes without starting with a slash, or contain ".." path
644 components. (CVE-2014-0475) Previously, some valid locale names were
645 silently replaced with the "C" locale when running in AT_SECURE mode
646 (e.g., in a SUID program). This is no longer necessary because of the
649 * On x86-64, the dynamic linker's lazy-binding support is now compatible
650 with application code using Intel MPX instructions. (With all previous
651 versions, the MPX register state could be clobbered when making calls
652 into or out of a shared library.) Note that while the new dynamic
653 linker is compatible with all known x86 hardware whether or not it
654 supports Intel MPX, some x86 instruction-set emulators might fail to
655 handle the new instruction encodings. This is known to affect Valgrind
656 versions up through 3.9 (but will be fixed in the forthcoming 3.10
657 release), and might affect other tools that do instruction emulation.
659 * Support for loadable gconv transliteration modules has been removed.
660 The support for transliteration modules has been non-functional for
661 over a decade, and the removal is prompted by security defects. The
662 normal gconv conversion modules are still supported. Transliteration
663 with //TRANSLIT is still possible, and the //IGNORE specifier
664 continues to be supported. (CVE-2014-5119)
666 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
667 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
668 resulting a denial-of-service security vulnerability in applications which
669 use functions related to iconv. (CVE-2014-6040)
673 * The following bugs are resolved with this release:
675 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
676 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
677 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
678 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
679 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
680 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
681 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
682 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
683 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
684 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
685 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
686 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
687 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
688 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
689 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
690 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
691 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
692 16431, 16453, 16474, 16506, 16510, 16529
694 * Slovenian translations for glibc messages have been contributed by the
695 Translation Project's Slovenian team of translators.
697 * The public headers no longer use __unused nor __block. This change is to
698 support compiling programs that are derived from BSD sources and use
699 __unused internally, and to support compiling with Clang's -fblock
700 extension which uses __block.
702 * CVE-2012-4412 The strcoll implementation caches indices and rules for
703 large collation sequences to optimize multiple passes. This cache
704 computation may overflow for large collation sequences and may cause a
705 stack or buffer overflow. This is now fixed to use a slower algorithm
706 which does not use a cache if there is an integer overflow.
708 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
709 rules for large collation sequences to optimize multiple passes and falls
710 back to alloca if malloc fails, resulting in a possible stack overflow.
711 The implementation now falls back to an uncached collation sequence lookup
714 * CVE-2013-4788 The pointer guard used for pointer mangling was not
715 initialized for static applications resulting in the security feature
716 being disabled. The pointer guard is now correctly initialized to a
717 random value for static applications. Existing static applications need
718 to be recompiled to take advantage of the fix (bug 15754).
720 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
721 to the d_name member of struct dirent, or omit the terminating NUL
722 character. (Bugzilla #14699).
724 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
725 aligned_alloc functions could allocate too few bytes or corrupt the
726 heap when passed very large allocation size values (Bugzilla #15855,
729 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
730 for AF_INET6 has been fixed (Bugzilla #16072).
732 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
733 pap_CW, quz_PE, the_NP.
735 * Substantially revised locales: gd_GB, ht_HT
737 * The LC_ADDRESS field was updated to support country_car for almost all
740 * ISO 1427 definitions were updated.
742 * ISO 3166 definitions were updated.
744 * The localedef utility now supports --big-endian and --little-endian
745 command-line options to generate locales for a different system from that
746 for which the C library was built.
748 * Binary locale files now only depend on the endianness of the system for
749 which they are generated and not on other properties of that system. As a
750 consequence, binary files generated with new localedef may be incompatible
751 with old versions of the GNU C Library, and binary files generated with
752 old localedef may be incompatible with this version of the GNU C Library,
753 in the following circumstances:
755 + Locale files may be incompatible on m68k systems.
757 + Locale archive files (but not separate files for individual locales) may
758 be incompatible on systems where plain "char" is signed.
760 * The configure option --disable-versioning has been removed. Builds with
761 --disable-versioning had not worked for several years.
763 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
764 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
766 * SystemTap probes for malloc have been introduced.
768 * SystemTap probes for slow multiple precision fallback paths of
769 transcendental functions have been introduced.
771 * Support for powerpc64le has been added.
773 * The soft-float powerpc port now supports e500 processors.
775 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
777 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
778 set of header declarations that are enabled by default, even when other
779 feature test macros or compiler options such as -std=c99 would otherwise
780 disable some of those declarations.
782 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
783 conflict with POSIX. The libbsd-compat library (which was a dummy library
784 that did nothing) has also been removed.
786 * Preliminary documentation about Multi-Thread, Async-Signal and
787 Async-Cancel Safety has been added.
789 * Change of ABI data structures for s390 and s390x:
790 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
791 allow for future hardware extensions. All library functions that accept or
792 return these structures were versioned in order to provide backwards
793 compatibility with existing code. However, not all cases can be handled
794 with interface versioning. If an application embeds either structure into
795 another structure and that structure is passed to another compilation unit
796 which expects the newer larger-sized object then any access to the new
797 fields will result in undefined behaviour. Similarly any access to fields
798 that were moved by the enlarging of the structures will cause undefined
799 behaviour. To fix the undefined behaviour all objects that are part of the
800 final in-memory image must agree on the size of structures, and this may
801 require recompilation.
805 * The following bugs are resolved with this release:
807 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
808 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
809 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
810 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
811 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
812 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
813 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
814 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
815 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
816 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
817 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
818 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
819 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
822 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
823 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
824 Distributions can re-enable building and using pt_chown via the new configure
825 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
826 considerable security risks and should only be used if the distribution
827 understands and accepts the risks.
829 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
832 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
833 fixed (Bugzilla #15330).
835 * Add support for calling C++11 thread_local object destructors on thread
836 and program exit. This needs compiler support for offloading C++11
837 destructor calls to glibc.
839 * Improved worst case performance of libm functions with double inputs and
842 * Support for priority inherited mutexes in pthread condition variables on
843 non-x86 architectures.
845 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
847 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
849 * Optimized string functions for ARM. Implemented by Will Newton and
852 * Optimized libm functions for SPARC. Implemented by David S. Miller.
854 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
857 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
858 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
860 * Added a benchmark framework to track performance of functions in glibc.
862 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
863 It is based on draft TS 18661 and currently enabled as a GNU extension.
865 * On Linux, the clock function now uses the clock_gettime system call
866 for improved precision, rather than old times system call.
868 * Added support for version-3 tz format files. This is needed when using
869 the tz database release 2013e or later, and affects a few unusual cases --
870 currently only TZ='America/Godthab' for time stamps after 2037.
872 * Added new API functions pthread_getattr_default_np and
873 pthread_setattr_default_np to get and set the default pthread
874 attributes of a process.
876 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
877 This may improve lock scaling of existing programs on TSX capable systems.
878 When the --enable-lock-elision=yes parameter is specified at configure
879 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
882 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
883 availability). Implemented by Ryan S. Arnold.
885 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
889 * The following bugs are resolved with this release:
891 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
892 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
893 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
894 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
895 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
896 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
897 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
898 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
899 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
900 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
901 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
902 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
903 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
904 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
905 14879, 14889, 14893, 14898, 14914.
907 * Optimization of memcpy for MIPS.
909 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
910 EMFILE has been fixed (Bugzilla #14889).
912 * The add-on ports collection is now distributed in the "ports" subdirectory
913 of the main GNU C Library distribution, rather than separately.
915 * Port to ARM AArch64 contributed by Linaro.
917 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
918 Optimized versions of memcpy, memset, and memcmp added for System z10 and
920 Implemented by Andreas Krebbel.
922 * The new function secure_getenv allows secure access to the environment,
923 returning NULL if running in a SUID/SGID process. This function replaces
924 the internal function __secure_getenv.
926 * SystemTap static probes have been added into the dynamic linker.
927 Implemented by Gary Benson.
929 * Optimizations of string functions strstr, strcasestr and memmem.
930 Implemented by Maxim Kuvyrkov.
932 * The minimum Linux kernel version that this version of the GNU C Library
933 can be used with is 2.6.16.
935 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
936 powerpc POWER7. Implemented by Will Schmidt.
938 * New configure option --disable-nscd builds the C library such that it
939 never attempts to contact the Name Service Caching Daemon (nscd).
940 New configure option --disable-build-nscd avoids building nscd itself;
941 this is the default if --disable-nscd is used.
943 * Improved support for cross-compilation, including cross-testing and
944 bootstrap builds without a previously built glibc.
946 * Several testsuite tests are now able to test multiple IFUNC variants of an
947 interface, rather than just testing the one that would be chooen by
950 * New configure options --with-bugurl and --with-pkgversion, for
951 distributors to use to embed their bug-reporting and package version
952 information in --help and --version output.
954 * The ttyname and ttyname_r functions on Linux now fall back to searching for
955 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
956 allows creation of chroots without the procfs mounted on /proc.
958 * The `crypt' function now fails if passed salt bytes that violate the
959 specification for those values. On Linux, the `crypt' function will
960 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
961 enabled, and fail on encrypted strings using the MD5 or DES algorithm
962 when the mode is enabled.
964 * The `clock_*' suite of functions (declared in <time.h>) is now available
965 directly in the main C library. Previously it was necessary to link with
966 -lrt to use these functions. This change has the effect that a
967 single-threaded program that uses a function such as `clock_gettime' (and
968 is not linked with -lrt) will no longer implicitly load the pthreads
969 library at runtime and so will not suffer the overheads associated with
970 multi-thread support in other code such as the C++ runtime library.
972 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
977 * The following bugs are resolved with this release:
979 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
980 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
981 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
982 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
983 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
984 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
985 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
986 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
987 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
988 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
989 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
990 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
991 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
992 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
993 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
994 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
995 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
996 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
997 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
998 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
999 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
1000 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
1003 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
1004 configuring glibc with:
1005 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
1006 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
1007 Implemented by H.J. Lu.
1011 + define static_assert
1013 + do not declare gets
1015 + declare at_quick_exit and quick_exit also for ISO C11
1017 + aligned_alloc. NB: The code is deliberately allows the size parameter
1018 to not be a multiple of the alignment. This is a moronic requirement
1019 in the standard but it is only a requirement on the caller, not the
1022 + timespec_get added
1024 + uchar.h support added
1026 + CMPLX, CMPLXF, CMPLXL added
1028 Implemented by Ulrich Drepper.
1030 * Support for the IA-64 has been moved to ports.
1032 * Remove support for anything but ELF binary format
1034 * Checking versions of poll, ppoll added.
1035 Implemented by Ulrich Drepper.
1037 * More generic and 64-bit performance optimizations to math functions.
1038 Implemented by Ulrich Drepper.
1040 * New configure option --enable-obsolete-rpc makes the deprecated RPC
1041 headers and functions available at compile time as they were before
1042 version 2.14. This option will be removed at some time in the future
1043 after the TI-RPC library becomes fully sufficient for the needs of
1044 existing applications.
1046 * Compatibility code for Linux kernel versions before 2.4 has been removed.
1047 Note that glibc is not expected to work with any Linux kernel version
1050 * New header <sys/auxv.h> and function getauxval allowing easy access to
1051 the AT_* key-value pairs passed from the Linux kernel. The header also
1052 defines the HWCAP_* bits associated with the AT_HWCAP key.
1054 * New locales: mag_IN
1056 * New configure option --enable-systemtap builds SystemTap static probes
1057 into libc for setjmp and longjmp and into libpthread for various operations.
1058 So far the setjmp/longjmp probes and some of the libpthread probes are
1059 provided only for i*86 and x86_64.
1060 Implemented by Roland McGrath and Rayson Ho.
1062 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
1064 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
1067 * More optimized functions for SPARC. Implemented by David S. Miller.
1069 * Improved support for cross-compilation, especially bootstrap builds
1070 without a previously built glibc.
1072 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
1073 Chris Metcalf from Tilera.
1075 * Support for the old ARM ABI has been removed from ports. Only the EABI is
1076 now supported for ARM processors.
1078 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
1079 as the name of the dynamic linker, to distinguish it from the
1080 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
1082 * Support for CRIS has been removed from ports.
1084 * A new class of installed header has been documented for low-level
1085 platform-specific functionality. PowerPC added the first instance with a
1086 function to provide time base register access. Contributed by Tulio
1087 Magno Quites Machado Filho.
1089 * ix86 configurations now install header files that are consistent with
1090 what x86-64 configurations install. These same header files can be used
1091 for -m32, -m64, or -mx32 builds.
1092 Contributed by H.J. Lu.
1094 * Math library bug fixes. A thorough audit of all open math library bugs was
1095 conducted by Joseph Myers. Significant progress was made on many math
1096 library bugs resulting in more accurate exceptions and function results.
1097 Many thanks to all those that contributed including Andreas Jaeger for his
1098 patch review and work on the x87 trigonometric instruction issues.
1100 * Timezone data is no longer installed. Timezone-related binaries and scripts
1101 will continue to be installed. Users should obtain their timezone data from
1102 their distribution provider or from the tzdata package at
1103 <ftp://munnari.oz.au/pub/>.
1107 * The following bugs are resolved with this release:
1109 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
1110 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
1111 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
1112 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
1113 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
1114 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
1115 13484, 13506, 13515, 13523, 13524, 13538, 13540
1117 * New program pldd to list loaded object of a process
1118 Implemented by Ulrich Drepper.
1120 * Add nss_db support back to glibc. No more dependency on Berkeley db
1121 and support for initgroups lookups.
1122 Implemented by Ulrich Drepper.
1124 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
1125 Contributed by HJ Lu.
1127 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
1128 Contributed by HJ Lu.
1130 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
1131 on x86-32 and x86-64.
1132 Contributed by Liubov Dmitrieva.
1134 * Optimized strchr and strrchr for SSE on x86-32.
1135 Contributed by Liubov Dmitrieva.
1137 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
1138 for x86-64 and x86-32.
1139 Contributed by Liubov Dmitrieva.
1141 * New interfaces: scandirat, scandirat64
1142 Implemented by Ulrich Drepper.
1144 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
1145 Implemented by Ulrich Drepper.
1147 * nscd now also caches the netgroup database.
1148 Implemented by Ulrich Drepper.
1150 * Integrate libm with gcc's -ffinite-math-only option.
1151 Implemented by Ulrich Drepper.
1153 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
1154 to math functions. Implemented by Ulrich Drepper.
1156 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
1157 Implemented by Ulrich Drepper.
1159 * New Linux interfaces: process_vm_readv, process_vm_writev
1161 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
1162 Implemented by Ulrich Drepper.
1164 * Optimized nearbyint and strcasecmp for PPC.
1165 Implemented by Adhemerval Zanella.
1167 * New locales: bho_IN, unm_US, es_CU, ta_LK
1171 * The following bugs are resolved with this release:
1173 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
1174 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
1175 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
1176 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
1177 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
1178 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
1179 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
1180 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
1181 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
1182 12795, 12811, 12813, 12814, 12841
1184 * The RPC implementation in libc is obsoleted. Old programs keep working
1185 but new programs cannot be linked with the routines in libc anymore.
1186 Programs in need of RPC functionality must be linked against TI-RPC.
1187 The TI-RPC implementation is IPv6 enabled and there are other benefits.
1189 Visible changes of this change include (obviously) the inability to link
1190 programs using RPC functions without referencing the TI-RPC library and the
1191 removal of the RPC headers from the glibc headers.
1192 Implemented by Ulrich Drepper.
1194 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
1195 syncfs, setns, sendmmsg
1197 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
1198 yue_HK, lij_IT, mhr_RU
1200 * New encodings: CP770, CP771, CP772, CP773, CP774
1202 * New program sotruss to trace calls through PLTs
1203 Implemented by Ulrich Drepper.
1205 * The malloc hook implementation is marked deprecated and will be removed
1206 from the default implementation in the next version. The design never
1207 worked ever since the introduction of threads. Even programs which do
1208 not create threads themselves can use multiple threads created internally.
1212 * The following bugs are resolved with this release:
1214 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
1215 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
1216 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
1217 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
1220 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
1222 * POWER7 optimizations: memset, memcmp, strncmp
1224 * New optimized string functions for x86-64: strnlen (SSE2),
1225 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
1226 Implemented by Ulrich Drepper.
1230 * The following bugs are resolved with this release:
1232 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
1233 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
1234 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
1235 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
1236 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
1237 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
1238 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
1239 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
1241 * New interfaces: pthread_getname_np, pthread_setname_np
1243 * New Linux interface: recvmmsg
1245 * STT_GNU_IFUNC implemented for Sparc by David Miller.
1247 * The dynamic linker now recognizes supported ABI versions from the
1248 EI_ABIVERSION field in the ELF header.
1249 Implemented by Ulrich Drepper.
1251 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
1252 will not be used to fill in password fields in the passwd.byname replies.
1253 Instead it is used to synthesize the shadow.byname table, should it be
1254 missing. This is a useful mode in some installations involving Solaris.
1255 Implemented by Ulrich Drepper.
1257 * New locales: kok_IN, sq_MK, cv_RU
1261 * The following bugs are resolved with this release:
1263 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
1264 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
1265 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
1266 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
1267 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
1268 10789, 10817, 10823, 10840, 10847
1270 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
1272 Implemented by Ulrich Drepper.
1274 * Checking version of longjmp added that fails if an uninitialized stack
1275 frame would be created. Implemented by Ulrich Drepper.
1277 * STT_GNU_IFUNC is now supported in static executables.
1278 Implemented by H.J. Lu.
1280 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
1282 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
1283 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
1284 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
1285 Contributed by H.J. Lu.
1287 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
1288 Implemented by Ulrich Drepper.
1290 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
1292 Contributed by H.J. Lu.
1294 * Support for fma instruction in AVX on x86-64.
1295 Implemented by H.J. Lu and Ulrich Drepper.
1297 * AVX support in x86-64 auditing support in ld.so.
1298 Implemented by H.J. Lu.
1300 * STB_GNU_UNIQUE support added.
1301 Implemented by Ulrich Drepper.
1303 * Implement second fallback mode for optimized DNS lookup for even more
1304 broken environments. If two requests from the same port are not
1305 handled correctly close the socket and open a new one before sending
1306 the second request. The 'single-request-reopen' option in /etc/resolv.conf
1307 can be used to select this mode right away, instead of rediscovering the
1308 necessity is every process again.
1309 Implemented by Ulrich Drepper.
1311 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
1312 Implemented by Adam Tkac.
1314 * Optimized iconv conversions for S390x.
1315 Implemented by Andreas Krebbel.
1317 * Using condvars with PI mutexes is now more efficient due to kernel
1318 support for requeueing to PI futexes. NPTL support added for x86-64.
1319 Implemented by Ulrich Drepper.
1321 * New locales: ps_AF, my_MM
1325 * The following bugs are resolved with this release:
1327 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
1328 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
1329 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
1330 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
1331 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
1333 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
1334 Implemented by Ulrich Drepper.
1336 * New Linux interfaces: accept4, fallocate, fallocate64.
1337 Implemented by Ulrich Drepper.
1339 * Correct declarations of string function when used in C++ code. This
1340 could lead to compile errors for invalid C++ code.
1342 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
1345 * New POSIX 2008 interface: psiginfo
1346 Implemented by Ulrich Drepper.
1348 * New ISO C++1x interfaces: quick_exit, at_quick_exit
1349 Implemented by Ulrich Drepper.
1351 * Support for selecting between multiple function definitions at runtime
1352 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
1354 * The libcrypt library can now use the hash function implementations in
1355 NSS. Implemented by Ulrich Drepper.
1357 * The malloc implementation can be compiled to be less memory efficient
1358 but higher performing in multi-threaded programs.
1359 Implemented by Ulrich Drepper.
1361 * New locales: nan_TW@latin, ks_IN
1363 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
1364 Implemented by Ulrich Drepper.
1366 * Extended printf hook support. It is possible to use user-defined types
1367 and extend existing format specifiers.
1368 Implemented by Ulrich Drepper.
1370 * Handling for group shadow files has been added.
1371 Implemented by Ulrich Drepper.
1373 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
1374 servers (the case, e.g., for some people using the built-in DNS
1375 server in ADSL modems/routers). There is a once-per-process timeout
1376 in case of a broken server. To avoid it, users can run nscd or put
1377 'options single-request' in /etc/resolv.conf.
1378 Implemented by Ulrich Drepper.
1382 * The following bugs are resolved with this release:
1384 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
1385 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
1386 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
1387 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
1388 6968, 6974, 6980, 6995, 7008, 7009, 7029
1390 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
1391 up at the same time. Implemented by Ulrich Drepper.
1393 * TLS descriptors for LD and GD on x86 and x86-64.
1394 Implemented by Alexandre Oliva.
1396 * getaddrinfo now handles DCCP and UDPlite.
1397 Implemented by Ulrich Drepper.
1399 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
1400 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
1401 Implemented by Ulrich Drepper.
1403 * New implementation of memmem, strstr, and strcasestr which is O(n).
1404 Implemented by Eric Blake.
1406 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
1408 * Implement "e" option for popen to open file descriptor with the
1409 close-on-exec flag set. Implemented by Ulrich Drepper.
1411 * Implement "b" mode for fmemopen. In this mode writes writes don't
1412 implicitly add a NUL byte and seeks from the end of the buffer really
1413 use the buffer end, not the string length as the basis.
1414 Implemented by Ulrich Drepper.
1416 * Many functions, exported and internal, now atomically set the close-on-exec
1417 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
1419 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
1421 Implemented by Pravin Satpute.
1423 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
1427 * The following bugs are resolved with this release:
1429 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
1430 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
1431 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
1432 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
1433 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
1434 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
1435 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
1437 * New locales: bo_CN, bo_IN, shs_CA.
1439 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
1441 * Sorting rules for some Indian languages (Devanagari and Gujarati).
1442 Implemented by Pravin Satpute.
1444 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
1446 * nscd caches now all timeouts for DNS entries
1447 Implemented by Ulrich Drepper.
1449 * nscd is more efficient and wakes up less often.
1450 Implemented by Ulrich Drepper.
1452 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
1453 vdprintf, and obstack_vprintf.
1454 Implemented by Jakub Jelinek.
1456 * Faster memset for x86-64.
1457 Implemented by Harsha Jagasia and H.J. Lu.
1459 * Faster memcpy on x86.
1460 Implemented by Ulrich Drepper.
1462 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
1463 Implemented by Ulrich Drepper.
1465 * Faster sqrt and sqrtf implemention for some PPC variants.
1466 Implemented by Steven Munroe.
1470 * The following bugs are resolved with this release:
1472 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
1473 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
1474 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
1475 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
1476 5071, 5103, 5104, 5112, 5113, 5184, 5186
1478 * More checking functions: fread, fread_unlocked, open*, mq_open.
1479 Implemented by Jakub Jelinek and Ulrich Drepper.
1481 * Extend fortification to C++. Implemented by Jakub Jelinek.
1483 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
1484 by not recognizing 'a' as a modifier when those specs are requested.
1485 Implemented by Jakub Jelinek.
1487 * PPC optimizations to math and string functions.
1488 Implemented by Steven Munroe.
1490 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
1491 options to be passed. Implemented by Ulrich Drepper.
1493 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
1495 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
1496 Implemented by Ulrich Drepper.
1498 * Handle private futexes in the NPTL implementation.
1499 Implemented by Jakub Jelinek and Ulrich Drepper.
1501 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
1502 Implemented by Roland McGrath and Ulrich Drepper.
1504 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
1506 * SHA-256 and SHA-512 based password encryption.
1507 Implemented by Ulrich Drepper.
1509 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
1510 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
1513 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
1514 Implemented by Ulrich Drepper.
1518 * The following bugs are resolved with this release:
1520 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
1521 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
1522 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
1523 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
1524 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
1525 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
1526 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
1529 * New Linux interfaces: epoll_pwait, sched_getcpu.
1531 * New generic interfaces: strerror_l.
1533 * nscd can now cache the services database. Implemented by Ulrich Drepper.
1537 * The following bugs are resolved with this release:
1539 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
1540 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
1541 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
1542 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
1543 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
1544 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
1545 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
1546 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
1547 3225, 3251, 3252, 3253, 3273
1549 * For Linux, the sorting of addresses returned by getaddrinfo now also
1550 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
1551 Implemented by Ulrich Drepper.
1553 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
1554 Implemented by Ulrich Drepper.
1556 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
1558 * New iconv module for MIK. Contributed by Alexander Shopov.
1560 * For sites with broken group and/or passwd database, the auto-propagate
1561 option of nscd can prevent creating ID lookup entries from the results
1562 of a name lookup and vice versa. This usually is no problem but some
1563 site might have problems with the default behavior.
1564 Implemented by Ulrich Drepper.
1566 * Iterating over entire database in NIS can be slow. With the
1567 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
1568 to trade time for memory. The entire database will be read at once.
1569 Implemented by Ulrich Drepper.
1571 * The interfaces introduced in RFC 3542 have been implemented by
1574 * Support for the new ELF hash table format was added by Ulrich Drepper.
1576 * Support for priority inheritance mutexes added by Jakub Jelinek and
1579 * Support for priority protected mutexes added by Jakub Jelinek.
1581 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
1582 or_IN, csb_PL, fy_NL, sr_ME.
1586 * More overflow detection functions.
1588 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
1589 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
1591 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
1592 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
1593 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
1594 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
1595 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
1596 by Masahide Washizawa.
1598 * It is now possible to install audit libraries for the dynamic linker using
1599 LD_AUDIT. Implemented by Ulrich Drepper.
1601 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
1602 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
1603 For a libc and libpthread that works well on Linux 2.4 kernels, we
1604 recommend using the stable 2.3 branch.
1606 * The new function open_wmemstream acts like open_memstream,
1607 but uses a wchar_t wide character buffer.
1609 * The new function ppoll is an improved version of poll, similar to pselect.
1611 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
1612 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
1613 renameat, unlinkat, linkat, symlinkat, readlinkat.
1615 * New Linux kernel system calls: unshare,
1616 inotify_init, inotify_add_watch, inotify_rm_watch.
1618 * The euidaccess function is now also known by the alias eaccess,
1619 for compatibility with some other systems.
1621 * Timezone data updated to 2006b version.
1625 * The following bugs are resolved with this release:
1627 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
1628 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
1629 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
1630 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
1631 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
1632 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
1634 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1636 * As of this release, GCC 4 can be used to compile the C Library.
1638 * Timezone data updated to 2005m version.
1642 * The following bugs are resolved with this release:
1644 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
1645 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
1646 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
1647 777, 787, 821, 822, 823, 825
1649 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
1653 * Support for RFC 3678. Real implementations exist only for Linux so far.
1654 Implemented by Ulrich Drepper.
1656 * nscd can now cache entries persistently. Expiring entries are reloaded.
1657 For speedups the cache can be shared in memory with client processes.
1658 Implemented by Ulrich Drepper.
1660 * nscd can now perform SELinux checks.
1661 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
1663 * getaddrinfo queries are now cached. Canonical name lookup is performed
1665 Implemented by Ulrich Drepper.
1667 * The nothrow function attribute is used when headers are used by gcc when
1668 compiling C code. This can avoid significant amounts of exception
1671 * The malloc functions perform more error checking and are stricter when
1672 it comes to reacting on errors. The default action is to terminate
1673 the process after showing an error message. Implemented by Ulrich Drepper.
1675 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
1676 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
1678 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
1679 namespaces using the new function dlmopen(). This feature is of course,
1680 like most other dynamic loading functionality, not available in statically
1681 linked applications. Implemented by Ulrich Drepper.
1683 * Low-overhead boundary checking variants of string and some stdio functions
1684 were added. These are to be used in conjunction with a gcc patch by
1685 Jakub Jelinek which adds calls to these functions if possible.
1686 Implemented by Jakub Jelinek and Ulrich Drepper.
1688 * Old code for several operating systems and machine architectures that
1689 have not been in working condition in a long time have been removed from
1690 the main source tree maintained by the GNU C Library's maintainers.
1691 These files are now reside in the separate `ports' source module
1692 that is usable as an add-on when building the library.
1696 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
1697 interrogate the dynamic linker, compatible with the Solaris interface.
1699 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
1700 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
1702 * getifaddrs now uses the netlink interface on Linux to get its information.
1703 Implemented by Thorsten Kukuk.
1705 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
1706 Implemented by Ulrich Drepper.
1708 * support for non-executable stacks on x86 has been added. Changes mostly
1711 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
1714 * getaddrinfo now performs destination address selection according to
1719 * Thread-safe interfaces for many functions that access locale data
1720 were added in version 2.3, but these features were omitted from NEWS.
1721 Many functions have variants with an `_l' suffix that take a `locale_t'
1722 object as a parameter rather than consulting the current locale.
1723 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
1724 create and maintain `locale_t' objects. Additionally, the new function
1725 `uselocale' sets "the current locale" (as used by functions not so
1726 parameterized) set for an individual thread. These features were added
1727 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
1729 * The functions getresuid, getresgid, setresuid, and setresgid, which
1730 have long been available on Linux, are now declared in <unistd.h>
1731 and are now also available on the Hurd.
1733 * ELF thread-local storage support (TLS) now works on x86-64.
1735 * The new dynamic string token $LIB is expanded in shared library names.
1736 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
1738 * Aldy Hernandez contributed complete software floating point support for
1739 PowerPC machines with no FPU.
1741 * fexecve is implemented on Linux.
1743 * The `btowc' function should work at least twice as fast due to
1744 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
1746 * With approriate thread add-ons cancelable functions are now implemented
1747 in libc.so as well. No need to call the function in libpthread. This
1748 change allowed to finally disable the incorrect and expensive handling
1749 of weak definition in ld.so.
1751 * Yet more PLT entries in libc.so have been removed. We finally arrived
1752 at the bare minimum. Startup times improved appropriately.
1754 * Support for the new Linux/x86 system call interface was added. The
1755 AT_SYSINFO auxiliary vector entry is recognized and handled.
1759 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
1762 * iconv (the program and the interface) now accepts empty names (excluding
1763 options like //TRANSLIT) to mean "use charset of current locale".
1765 * localedef can now transliterate characters in strings which are not in
1766 the provided charmap. The information from the input locale is used.
1768 * Prelinking support was added for ELF targets. This requires additional
1769 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
1771 * Read-only stdio streams now use mmap to speed up operation by eliminating
1772 copying and buffer underflows. To use add 'm' to the mode string of
1773 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
1775 * The malloc functions were completely rewritten by Wolfram Gloger based
1776 on Doug Lea's malloc-2.7.0.c.
1778 * Isamu Hasegawa contributed a completely new and POSIX-conformant
1779 implementation of regex.
1781 * Bruno Haible upgraded the iconv and locale implementation to support
1784 * Contents of the LC_* and LANG environment variables in the CEN style are
1785 not recognized anymore. It never was used. Change by Ulrich Drepper.
1787 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
1788 thread-local storage (TLS) ABI on some platforms.
1789 Changes by Ulrich Drepper. SH support by Kaz Kojima.
1791 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
1792 EUC-JISX0213, and TSCII.
1794 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
1795 BSD-compatible interface for getting all network interface addresses.
1796 Implementation for IPv4 by Roland McGrath.
1798 * Loading of locale data is faster due to the introduction of a locale
1799 archive. Implemented by Roland McGrath and Ulrich Drepper.
1801 * Startup times are significantly reduced by not using exported functions
1802 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
1805 * Steven Munroe contributed a port to PowerPC64/Linux.
1809 * The Hurd now uses the GNU libio implementation of stdio rather than the
1810 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
1812 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
1813 with the same behavior as the Linux system call of the same name.
1817 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
1818 128-bit long double format.
1820 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
1821 IBM1161, and IBM1162 charsets.
1823 * Andreas Jaeger contributed a port to x86-64/Linux.
1825 * Peter Bruin contributed a port to PowerPC/Hurd.
1827 * libc functions using I/O streams now can handle wide-oriented streams
1830 * optimizations in the dynamic linker. Binaries created by recent binutils
1831 versions start up quicker due to reduced time spent on relocations.
1833 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
1837 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
1838 asinh, atanh, j0 for the 128-bit long double format.
1840 * Bruno Haible updated all the code handling Unicode in some form to
1841 support Unicode 3.1.
1843 * Speed of regex for single-byte locales is back to previous levels.
1844 Patch by Isamu Hasegawa.
1846 * Alpha, SPARC, and IA-64 now also using floating stacks.
1848 * Startup time of internationalized applications greatly improved through
1849 iconv cache. Use iconvconfig to generate the cache file.
1850 Contributed by Ulrich Drepper.
1852 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
1853 severe performance problems. Patch by David Mosberger.
1855 * The Hurd port got a lot more functionality like AIO, various stdio
1856 extensions, etc. Mainly done by Roland McGrath.
1858 * mtrace can now lookup symbols in shared libraries.
1862 * Intel's IA-64 math library is largely integrated. It provides fast and
1863 accurate implementatations for most basic and standard math functions
1864 in float, double, and long double format.
1866 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
1867 and asin for the 96-bit long double format and asin, log, tan for the
1868 128-bit long double format.
1870 * The beginning of a last-bit accurate math library by IBM Haifa were added.
1871 The basic double functions exist today. Contributed by Abraham Ziv
1872 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
1873 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
1875 * An asynchronous name lookup library was added. The interface is designed
1876 after POSIX AIO. The proposal was circulated beforehand to get comments.
1877 No negative ones came in. Implemented by Ulrich Drepper.
1879 * Port to S390/64bit contributed by Martin Schwidefsky
1880 <schwidefsky@de.ibm.com>.
1882 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
1883 of functions for Linux/IA-64.
1885 * The RPC code is now thread safe. Threads can now use the same service
1886 of different services at the same time. Patch by Eric Norum
1887 <eric.norum@usask.ca> with some help by Ulrich Drepper.
1889 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
1890 family of functions for Linux/S390.
1892 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
1893 of functions for Linux/x86.
1895 * Port to Linux/CRIS contributed by Axis Communications.
1899 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
1900 we can now check for namespace violations and missing declarations. The
1901 result is that almost all headers are now Unix-compliant (as defined in
1902 the upcoming XPG6). The negative side is that some programs might need
1903 corrections, too, if they depend on the incorrect form of the headers in
1904 previous versions which defined too many symbols and included too many
1907 * regex now handles multibyte character sets correctly.
1908 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
1910 * iconv (the program) does now conform to the upcoming XPG6 and handles
1911 charmaps. Instead of the charset names the path of charmaps can be
1912 provided and the conversion happens based on this data.
1913 Contributed by Ulrich Drepper.
1915 * The locale program now provides detailed information about the installed
1920 only lists the names of the supported locales
1924 provides details such as country, language, and codeset name.
1925 Contributed by Ulrich Drepper.
1929 * The gencat program now parses the input file according to the charset
1930 selected by the LC_CTYPE category. This is important for stateful
1931 character sets. To make generating catalogs easier there is a way
1932 to overwrite the charset selected by the locale: before the first
1933 message or $ quote line the catalog can contain a line like
1935 $ codeset=ISO-8859-2
1937 to select the charset (ISO-8859-2 in this case).
1939 Implemented by Shinya Hanataka and Ulrich Drepper.
1941 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
1942 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
1943 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
1945 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
1946 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
1948 * The LANGUAGE environment variable is now ignored unless the locale is
1949 changed from the default "C" locale.
1951 * The usual bug fixes.
1955 * Greg McGary added runtime support for bounds checking using gcc's
1956 new -fbounded-pointers option. ix86 target is complete. PowerPC
1959 * Thorsten Kukuk added secure mode support to nscd.
1961 * The Berkeley db libraries have been removed.
1963 Related, the nss_db module is now in a separate package since it
1964 obviously requires a database library being available.
1966 * Wide character I/O streams implemented by Ulrich Drepper.
1968 * Functions from the extended socket API added by Ulrich Drepper.
1970 * Functions feenableexcept and fedisableexcept to control the
1971 behaviour of individual exceptions have been added by Andreas Jaeger.
1973 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
1975 * The resolver code has been updated from bind 8.2.3-T5B which supports
1976 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
1979 This change could in some situations effect backward compatibility. Since
1980 now `_res' is a thread-local instead of a global variable, modifying it
1981 in one thread does not have any effect in other threads.
1983 The resolver library was also extended to allow IPv6 as the transport
1984 protocol for the requests. This work was done by Stig Venaas.
1986 * Compatibility code for K&R C compilers has been removed from the
1987 header files. A ISO C compiler is needed to use the library
1988 (conforming to either C89 or C99 standard).
1990 * Complete rewrite of the localedef program to support multibyte character
1991 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
1992 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
1993 Implemented by Ulrich Drepper.
1995 Bruno Haible significantly improved the generation and use of the data
1996 structures for the wide character tables.
1998 * Plural handling in gettext implemented by Ulrich Drepper.
2000 * The utmp daemon has been removed.
2002 * The port to MIPS-Linux has been finished by Andreas Jaeger.
2004 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
2007 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
2009 * POSIX barriers implemented by Kaz Kylheku.
2011 * POSIX spawn function family implemented by Ulrich Drepper.
2013 * POSIX spinlocks are now available.
2015 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
2017 * the configure option --enable-kernel=X.Y.Z allows to strip out
2018 compatibility for kernel versions before X.Y.Z. This is currently only
2019 implemented for Linux.
2021 * the sockaddr_in6 structure changed. The IPv6 working group added a new
2022 field sin6_scope_id. This means that all programs using IPv6 should be
2023 recompiled. Don't expect binary compatibility with previous glibc
2026 * various conversion modules for IBM character sets contributed by
2029 * IA-64 port by Jes Sorensen and HJ Lu.
2043 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
2045 * New xdr functions are added; some rpc functions are now 64bit clean.
2047 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
2049 * Fixed known incompatibilities with glibc 2.0.
2051 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
2053 * Optimized a number of functions (especially the ELF dynamic loader).
2055 * Update timezone data files.
2057 * lots of charmaps corrections
2059 * some new locale definitions and charmaps
2064 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
2065 conform to POSIX member type requirements. Symbol versions have been
2066 adjusted as needed within the library, and for direct use by applications,
2067 but there is potential for problems if third-party libraries use
2068 struct timeval as part of their interface. This does not present
2069 a problem for X and other "essential" system libraries.
2071 * An additional locale model to support C++ Standard Library locale
2072 model and probably more was implemented by Ulrich Drepper.
2074 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
2077 * Miles Bader provided the `argp' function family to support hierachical
2078 command line argument parsing, layered on top of getopt.
2080 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
2082 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
2085 * scanf recognizes the %a and %A format for scanning floating point numbers.
2087 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
2088 information and interfaces for the available integer types.
2090 * about 130 new math functions were added to implement the ISO C9x math
2093 * the new header <complex.h> contains definitions of the complex math
2094 functions from ISO C 9X.
2096 * the new header <tgmath.h> defines generic macros to use complex or
2097 real valued functions.
2099 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
2101 * Andreas Jaeger provided a test suite for the math library.
2103 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
2105 * Ulrich Drepper added character set conversion functions (iconv).
2107 * Optimized string functions have been added.
2109 * The localedata addon is now part of glibc.
2111 * An implementation of profiling shared libraries was added by Ulrich Drepper.
2113 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
2114 daemon for NSS (nscd).
2116 Missing a better place here are some numbers on improvements. Under
2117 Linux 2.1.125 un-tar-ing the kernel sources takes
2121 using local files 12.19s 6.88s 22.91s
2123 using NIS 13.92s 8.91s 26.34s
2125 using NIS & nscd 10.37s 7.34s 25.30s
2127 using NIS+ 27.57s 30.37s 640.46s
2129 using NIS+ & nscd 10.25s 7.83s 26.51s
2131 using NIS & old nscd [1] 13.83s 8.32s 29.60s
2133 Keep in mind that non-namelookup related operations dominate above times.
2134 It was just a common complain that using NIS+ unpacking the kernel is
2137 [1] The old nscd implementation is not available anymore since it was
2138 distributed with glibc up to version 2.0.98 and thus is now replaced.
2140 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
2142 * Mark Kettenis provided a Hesiod NSS module.
2144 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
2145 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
2147 * rcmd can now handle netgroups (Dick Streefland).
2149 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
2152 * Support for the IPv6 protocol has been added to the socket API, as per the
2153 latest draft standards.
2155 * Support for Linux 2.2 has been added.
2157 * Interface changes relative to the latest 2.0.x release:
2158 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2159 addseverity NEW: Unix98
2160 alphasort64 NEW: LFS
2161 argp_err_exit_status NEW: argp, GNU ext
2162 argp_error NEW: argp, GNU ext
2163 argp_failure NEW: argp, GNU ext
2164 argp_help NEW: argp, GNU ext
2165 argp_parse NEW: argp, GNU ext
2166 argp_program_bug_address NEW: argp, GNU ext
2167 argp_program_version NEW: argp, GNU ext
2168 argp_program_version_hook NEW: argp, GNU ext
2169 argp_state_help NEW: argp, GNU ext
2170 argp_usage NEW: argp, GNU ext
2171 authdes_create NEW: Secure RPC
2172 authdes_getucred NEW: Secure RPC
2173 authdes_pk_create NEW: Secure RPC
2174 backtrace NEW: GNU ext.
2175 backtrace_symbols NEW: GNU ext.
2176 backtrace_symbols_fd NEW: GNU ext.
2178 cacosf NEW: ISO C 9x
2179 cacosh NEW: ISO C 9x
2180 cacoshf NEW: ISO C 9x
2181 cacoshl NEW: ISO C 9x
2182 cacosl NEW: ISO C 9x
2189 casinf NEW: ISO C 9x
2190 casinh NEW: ISO C 9x
2191 casinhf NEW: ISO C 9x
2192 casinhl NEW: ISO C 9x
2193 casinl NEW: ISO C 9x
2195 catanf NEW: ISO C 9x
2196 catanh NEW: ISO C 9x
2197 catanhf NEW: ISO C 9x
2198 catanhl NEW: ISO C 9x
2199 catanl NEW: ISO C 9x
2200 cbc_crypt NEW: Secure RPC
2204 ccoshf NEW: ISO C 9x
2205 ccoshl NEW: ISO C 9x
2211 cimagf NEW: ISO C 9x
2212 cimagl NEW: ISO C 9x
2213 clearerr_locked REMOVED
2214 clntunix_create NEW: sunrpc ext
2216 clog10 NEW: ISO C 9x
2217 clog10f NEW: ISO C 9x
2218 clog10l NEW: ISO C 9x
2228 cprojf NEW: ISO C 9x
2229 cprojl NEW: ISO C 9x
2231 crealf NEW: ISO C 9x
2232 creall NEW: ISO C 9x
2237 csinhf NEW: ISO C 9x
2238 csinhl NEW: ISO C 9x
2241 csqrtf NEW: ISO C 9x
2242 csqrtl NEW: ISO C 9x
2246 ctanhf NEW: ISO C 9x
2247 ctanhl NEW: ISO C 9x
2249 des_setparity NEW: Secure RPC
2250 ecb_crypt NEW: Secure RPC
2251 endutxent NEW: Unix98
2253 exp10f NEW: ISO C 9x
2254 exp10l NEW: ISO C 9x
2258 fattach NEW: STREAMS
2259 fdetach NEW: STREAMS
2263 feclearexcept NEW: ISO C 9x
2264 fegetenv NEW: ISO C 9x
2265 fegetexceptflag NEW: ISO C 9x
2266 fegetround NEW: ISO C 9x
2267 feholdexcept NEW: ISO C 9x
2269 feraiseexcept NEW: ISO C 9x
2270 ferror_locked REMOVED
2271 fesetenv NEW: ISO C 9x
2272 fesetexceptflag NEW: ISO C 9x
2273 fesetround NEW: ISO C 9x
2274 fetestexcept NEW: ISO C 9x
2275 feupdateenv NEW: ISO C 9x
2276 fflush_locked REMOVED
2280 fgets_unlocked NEW: GNU ext.
2281 fileno_locked REMOVED
2293 fputc_locked REMOVED
2294 fputs_unlocked NEW: GNU ext.
2295 fread_unlocked NEW: GNU ext.
2300 fstatvfs NEW: Unix98
2304 ftruncate64 NEW: LFS
2306 fwrite_unlocked NEW: GNU ext.
2307 gai_strerror NEW: IPv6
2311 getchar_locked REMOVED
2313 getdate_err NEW: Unix98
2314 getdate_r NEW: GNU ext.
2316 getnameinfo NEW: IPv6
2317 getnetname NEW: Secure RPC
2318 getpmsg NEW: STREAMS
2319 getpt NEW: Unix98 PTY
2320 getrlimit64 NEW: LFS
2321 getutxent NEW: Unix98
2322 getutxid NEW: Unix98
2323 getutxline NEW: Unix98
2324 glob64 NEW: GNU ext.
2325 globfree64 NEW: GNU ext.
2326 gnu_get_libc_release NEW: GNU ext.
2327 gnu_get_libc_version NEW: GNU ext.
2328 grantpt NEW: Unix98 PTY
2329 host2netname NEW: Secure RPC
2331 iconv_close NEW: iconv
2332 iconv_open NEW: iconv
2333 if_freenameindex NEW: IPv6
2334 if_indextoname NEW: IPv6
2335 if_nameindex NEW: IPv6
2336 if_nametoindex NEW: IPv6
2337 in6addr_any NEW: IPv6
2338 in6addr_loopback NEW: IPv6
2339 inet6_isipv4mapped NEW: IPv6
2340 isastream NEW: STREAMS
2341 iswblank NEW: GNU ext.
2342 key_decryptsession NEW: Secure RPC
2343 key_decryptsession_pk NEW: Secure RPC
2344 key_encryptsession NEW: Secure RPC
2345 key_encryptsession_pk NEW: Secure RPC
2346 key_gendes NEW: Secure RPC
2347 key_get_conv NEW: Secure RPC
2348 key_secretkey_is_set NEW: Secure RPC
2349 key_setnet NEW: Secure RPC
2350 key_setsecret NEW: Secure RPC
2351 llrint NEW: ISO C 9x
2352 llrintf NEW: ISO C 9x
2353 llrintl NEW: ISO C 9x
2354 llround NEW: ISO C 9x
2355 llroundf NEW: ISO C 9x
2356 llroundl NEW: ISO C 9x
2361 lrintf NEW: ISO C 9x
2362 lrintl NEW: ISO C 9x
2363 lround NEW: ISO C 9x
2364 lroundf NEW: ISO C 9x
2365 lroundl NEW: ISO C 9x
2367 makecontext NEW: Unix98
2368 mempcpy NEW: GNU ext.
2371 modify_ldt NEW: kernel
2375 nearbyint NEW: ISO C 9x
2376 nearbyintf NEW: ISO C 9x
2377 nearbyintl NEW: ISO C 9x
2378 netname2host NEW: Secure RPC
2379 netname2user NEW: Secure RPC
2380 nexttoward NEW: ISO C 9x
2381 nexttowardf NEW: ISO C 9x
2382 nexttowardl NEW: ISO C 9x
2386 passwd2des NEW: Secure RPC
2388 pow10f NEW: GNU ext.
2389 pow10l NEW: GNU ext.
2392 printf_size NEW: GNU ext.
2393 printf_size_info NEW: GNU ext.
2394 profil_counter REMOVED
2395 pthread_mutexattr_getkind_np REPLACED
2396 pthread_mutexattr_setkind_np REPLACED
2397 ptsname NEW: Unix98 PTY
2398 ptsname_r NEW: Unix98 PTY
2400 putchar_locked REMOVED
2401 putgrent NEW: GNU ext.
2403 putpmsg NEW: STREAMS
2404 pututxline NEW: Unix98
2408 readdir64_r NEW: LFS
2409 remquo NEW: ISO C 9x
2410 remquof NEW: ISO C 9x
2411 remquol NEW: ISO C 9x
2413 roundf NEW: ISO C 9x
2414 roundl NEW: ISO C 9x
2416 scalbln NEW: ISO C 9x
2417 scalblnf NEW: ISO C 9x
2418 scalblnl NEW: ISO C 9x
2420 sendfile NEW: kernel
2421 setcontext NEW: Unix98
2422 setrlimit64 NEW: LFS
2423 setutxent NEW: Unix98
2425 sigignore NEW: Unix98
2426 sigqueue NEW: POSIX.1b
2427 sigrelse NEW: Unix98
2428 sigset NEW: POSIX.1b
2429 sigtimedwait NEW: POSIX.1b
2430 sigwaitinfo NEW: POSIX.1b
2431 sincos NEW: GNU ext.
2432 sincosf NEW: GNU ext.
2433 sincosl NEW: GNU ext.
2437 strcasestr NEW: GNU ext.
2438 strtoimax NEW: ISO C 9x
2439 strtoumax NEW: ISO C 9x
2440 strverscmp NEW: GNU ext.
2441 svcauthdes_stats NEW: Secure RPC
2442 svcunix_create NEW: sunrpc etx
2443 svcunixfd_create NEW: sunrpc ext
2444 swapcontext NEW: Unix98
2445 tcgetsid NEW: Unix98 PTY
2446 tdestroy NEW: GNU ext.
2447 tgamma NEW: ISO C 9x
2448 tgammaf NEW: ISO C 9x
2449 tgammal NEW: ISO C 9x
2453 truncf NEW: ISO C 9x
2454 truncl NEW: ISO C 9x
2456 unlockpt NEW: Unix98 PTY
2457 updwtmpx NEW: Unix98
2458 user2netname NEW: Secure RPC
2459 utmpxname NEW: Unix98
2460 versionsort NEW: GNU ext.
2461 versionsort64 NEW: GNU ext.
2463 wcscasecmp NEW: GNU ext.
2464 wcsncasecmp NEW: GNU ext.
2465 wcsnlen NEW: GNU ext.
2466 wcstoimax NEW: ISO C 9x
2467 wcstoll NEW: ISO C 9x
2468 wcstoull NEW: ISO C 9x
2469 wcstoumax NEW: ISO C 9x
2471 wordexp NEW: POSIX.2
2472 wordfree NEW: POSIX.2
2473 write_profiling REMOVED
2474 xdecrypt NEW: Secure RPC
2475 xdr_authdes_cred NEW: Secure RPC
2476 xdr_authdes_verf NEW: Secure RPC
2477 xdr_cryptkeyarg NEW: Secure RPC
2478 xdr_cryptkeyarg2 NEW: Secure RPC
2479 xdr_cryptkeyres NEW: Secure RPC
2480 xdr_getcredres NEW: Secure RPC
2481 xdr_key_netstarg NEW: Secure RPC
2482 xdr_key_netstres NEW: Secure RPC
2483 xdr_keybuf NEW: Secure RPC
2484 xdr_keystatus NEW: Secure RPC
2485 xdr_netnamestr NEW: Secure RPC
2486 xdr_sizeof NEW: Secure RPC
2487 xdr_unixcred NEW: sunrpc ext
2488 xencrypt NEW: Secure RPC
2489 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2500 * inet_ntoa is thread-safe
2502 * updwtmp is moved from libutil to libc
2504 * rewrite of cbrt function
2506 * update of timezone data
2520 * add atoll function
2522 * fix complex problems in Berkeley DB code
2524 * fix math functions
2528 * fixed lots of header problems (especially Linux/GNU specific)
2530 * dynamic loader preserves all registers
2532 * Roland McGrath provided support for handling of auxiliary objects in
2533 the ELF dynamic loader.
2535 * support for parallel builds is improved
2539 * GNU extensions are no longer declared by default. To enable them you
2540 must define the macro `_GNU_SOURCE' in your program or compile with
2543 * The library has changed from using GNU ld symbol aliases to using weak
2544 symbols where available. The ELF object file format supports weak
2545 symbols; GNU ld also supports weak symbols in the a.out format. (There
2546 is also now support for other GNU ld extensions in ELF. Use the
2547 `--with-elf' option to configure to indicate you have ELF, and
2548 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
2549 of many files which contained only symbol aliases, reducing the size of
2550 the source and the compiled library; many other files were renamed to
2551 less cryptic names previously occupied by the symbol alias files.
2552 There is a new header file <elf.h> for programs which operate on
2553 files in the ELF format.
2555 * Converted to Autoconf version 2, so `configure' has more options.
2556 Run `configure --help' to see the details.
2558 * The library can now be configured to build profiling, highly-optimized
2559 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
2560 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
2561 `configure' enable building these extra libraries. The shared library is
2562 built by default when using both ELF and GNU ld. When shared libraries
2563 are enabled, the new library `-ldl' is available for arbitrary run-time
2564 loading of shared objects; its interface is defined in <dlfcn.h>. The
2565 new header file <link.h> gives access to the internals of the run-time
2566 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
2567 application of same name on other systems and it provides information
2568 about dynamically linked binaries.
2570 * The C library now provides the run-time support code for profiling
2571 executables compiled with `-pg'. Programs can control the profiling code
2572 through the interface in <sys/gmon.h>. The `gmon.out' files written by
2573 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
2574 the support for this file format was contributed by David Mosberger-Tang.
2576 * The math code has been replaced with a math library based on fdlibm from
2577 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
2578 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
2579 functions. The math functions now reside in a separate library, so
2580 programs using them will need to use `-lm' their linking commands.
2582 * John C. Bowman contributed optimized ix87 assembler inline functions.
2584 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
2585 mechanism similar to that found in Solaris 2. This is now used for the
2586 group, passwd, hosts, networks, services, protocols, rpc, ethers,
2587 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
2588 file controls what services are used for each individual database. This
2589 works by loading shared libraries with names specified in `nsswitch.conf',
2590 so service modules can be changed or added at any time without even
2591 relinking any program. Currently there are the file, db, and NIS based
2592 NSS services available.
2594 * The new functions `strtoq' and `strtouq' parse integer values from
2595 strings, like `strtol' and `strtoul', but they return `long long int' and
2596 `unsigned long long int' values, respectively (64-bit quantities).
2598 * The new functions `strtof' and `strtold' parse floating-point values from
2599 strings, like `strtod', but they return `float' and `long double' values,
2600 respectively (on some machines `double' and `long double' are the same).
2602 * Ulrich Drepper has contributed new implementations of the floating-point
2603 printing and reading code used in the `printf' family of functions and
2604 `strtod', `strtof', and `strtold'. These new functions are perfectly
2605 accurate, and much faster than the old ones.
2607 * The implementation of the POSIX locale model was completely rewritten by
2608 Ulrich Drepper. This includes the new programs `localedef' and `locale'
2609 to compile the POSIX locale definition.
2611 * The former dummy implementations of the strcoll and strxfrm function are
2612 now replaced by fully functional code contributed by Ulrich Drepper. The
2613 collation information comes from the POSIX locale definitions.
2615 * The new header <langinfo.h> defines an interface for accessing
2616 various locale-dependent data (using the locale chosen with `setlocale').
2618 * Ulrich Drepper has contributed a new suite of functions for operation on
2619 wide-character and multibyte-character strings, in <wchar.h>;
2620 and classification and case conversion of wide characters, in <wctype.h>.
2621 These new functions are conforming to the ISO C, Amendement 1 specification.
2623 * There is now a second implementation of the standard I/O library available.
2624 It comes from GNU libg++ as was written by Per Bothner, heavily modified
2625 by Hongjiu Lu and made thread safe by Ulrich Drepper.
2627 * You can now use positional parameter specifications in format strings
2628 for the `printf' and `scanf' families of functions. For example,
2629 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
2630 ``Number 6, Mr Jones''. This is mainly useful when providing different
2631 format strings for different languages, whose grammars may dictate
2632 different orderings of the values being printed. To support this
2633 feature, the interface for `register_printf_handler' has changed; see
2634 the header file <printf.h> for details.
2636 * The `printf' and `scanf' families of functions now understand a new
2637 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
2638 to group numbers as indicated by the locale; for `scanf' and friends, this
2639 says to accept as valid only a number with all the proper grouping
2640 separators in the right places. In the default "C" locale, numbers are
2641 not grouped; but locales for specific countries will define the usual
2642 conventions (i.e. separate thousands with `,' in the US locale).
2644 * The pgrp functions have been regularized, slightly incompatibly but much
2645 less confusingly. The core functions are now `getpgid' and `setpgid',
2646 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
2647 argument) and BSD `setpgrp' (identical to `setpgid') functions are
2648 provided for compatibility. There is no longer an incompatible `getpgrp'
2649 with an argument declared under _BSD_SOURCE; no BSD code uses it.
2651 * The new header file <fts.h> and suite of functions simplify programs that
2652 operate on directory trees. This code comes from 4.4 BSD.
2654 * The resolver code has been updated from the BIND 4.9.5-P1 release.
2655 Parts of the code were heavily modified by Ulrich Drepper to fit in the
2656 NSS scheme used in glibc.
2658 * There is a new malloc debugging hook `__memalign_hook'.
2660 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
2661 `unsigned int' in <sys/types.h>. These are for compatibility only and
2662 their use is discouraged.
2664 * The `-lmcheck' library to enable standard malloc debugging hooks is now
2665 done differently, so that it works even without GNU ld.
2667 * New function `euidaccess' checks allowed access to a file like `access',
2668 but using the effective IDs instead of the real IDs.
2670 * The time zone data files have been updated for the latest and greatest
2671 local time conventions of the countries of the world.
2673 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
2676 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
2677 for formatting floating-point numbers. They are provided only for
2678 compatibility; new programs should use `sprintf' instead. There are
2679 also equivalent function for the `long double' floating-point type and
2680 all functions also exist in a reentrant form.
2682 * The new auxiliary library `-lutil' from 4.4 BSD contains various
2683 functions for maintaining the login-record files (primarily of use to
2684 system programs such as `login'), and convenient functions for
2685 allocating and initializing a pseudo-terminal (pty) device.
2687 * Ulrich Drepper has contributed new support for System V style
2688 shared memory and IPC on systems that support it.
2690 * Ulrich Drepper has contributed several miscellaneous new functions found
2691 in System V: The `hsearch' family of functions provide an effective
2692 implementation of hash tables; `a64l' and `l64a' provide a very simple
2693 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
2696 * Ulrich Drepper has contributed new reentrant counterparts for the
2697 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
2699 * Ulrich Drepper has contributed new, highly-optimized versions of several
2700 string functions for the i486/Pentium family of processors.
2702 * Ulrich Drepper has updated the Linux-specific code, based largely
2703 on work done in Hongjiu Lu's version of GNU libc for Linux.
2704 The GNU library now supports Linux versions 2.0.10 and later,
2705 using the ELF object file format (i[3456]86-*-linux).
2707 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
2709 * David Mosberger-Tang and Richard Henderson have ported the C library
2710 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
2711 dynamic linking support for ELF/Alpha.
2713 * Richard Henderson contributed several Alpha optimized assembler function
2714 for arithmetic and string handling.
2716 * Ulrich Drepper has contributed a new set of message catalog functions to
2717 support multiple languages using the <libintl.h> interface, for use with
2718 his new package GNU gettext. Translation volunteers have contributed
2719 catalogs of the library's messages in Spanish, German, and Korean.
2721 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
2722 program and the `catgets' function for reading the catalog files it
2723 creates. (The <libintl.h> interface is preferred; we include the
2724 <nl_types.h> interface using `catgets' only for source compatibility with
2725 programs already written to use it.)
2727 * New header file <values.h> gives SVID-compatible names for <limits.h>
2730 * Various new macros, declarations, and small header files for compatibility
2733 * New function `group_member' is a convenient way to check if a process has
2734 a given effective group ID.
2736 * When using GCC 2.7 and later, the socket functions are now declared in a
2737 special way so that passing an argument of type `struct sockaddr_in *',
2738 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
2739 `struct sockaddr *' type, does not generate a type-clash warning.
2741 * New function `error' declared in header file <error.h> is a convenient
2742 function for printing error messages and optionally exiting; this is the
2743 canonical function used in GNU programs. The new functions `err', `warn',
2744 and friends in header file <err.h> are the canonical 4.4 BSD interface for
2745 doing the same thing.
2747 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
2748 POSIX.2 `glob' function to do ~ and {...} expansion.
2750 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
2751 `clearenv' which is used in POSIX.9 is also available.
2753 * New function `getsid' returns session ID number on systems that support it.
2755 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
2756 files <db.h> and <mpool.h> provide a rich set of functions for several
2757 types of simple databases stored in memory and in files, and <ndbm.h> is
2758 an old `ndbm'-compatible interface using the `db' functions. Link with
2759 `-ldb' to get these functions.
2761 * New macro `strdupa' copies a string like `strdup', but uses local stack
2762 space from `alloca' instead of dynamic heap space from `malloc'.
2764 * New function `strnlen' is like `strlen' but searches only a given maximum
2765 number of characters for the null terminator. `stpncpy', `strndup' and
2766 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
2769 * New function `statfs' in header <sys/statfs.h>.
2771 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
2772 provide convenient functions for operating on blocks of null-terminated
2775 * A new suite of functions in <utmp.h> handle all the details of reading
2776 and writing the utmp file.
2778 * An implementation of the NIS/YP(tm) based NSS service was contributed by
2781 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
2782 completely POSIX compliant and also implemented the extended functionality
2783 to handle alternate digit representation and alternate era date formats.
2785 * Ulrich Drepper provided an implementation of the `strptime' function
2786 defined in XPG4.2 which transforms a string into a `struct tm' value.
2788 * Paul Eggert provided the tzselect shell script as part of the timezone
2789 code. The shell script makes it easy to select the correct timezone
2792 * The implementation of the malloc family of functions is completely replaced
2793 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
2794 The implementation uses the mmap function (if available) and it is
2795 optimized for the use in multi threaded programs.
2797 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
2798 functions. This new functionality is usable by specifying a special
2799 salt string and it is compatible with implementation on *BSD systems.
2801 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
2802 `getsubopt' to handle second level command line options, `bsd_signal'
2803 to access BSD style `signal' functionality, the obsolete `regexp' style
2806 * the `lchown' function is available on system which support this
2809 * The implementation of the shadow password handling function was contributed
2812 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
2814 * POSIX.1g support was added. The <sys/select.h> header is available,
2815 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
2816 implementation of `getaddrinfo'.
2820 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
2822 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
2823 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
2825 * The new function `daemon' from 4.4 BSD is useful for server programs that
2826 want to put themselves in the background.
2828 * Joel Sherrill has contributed support for several standalone boards that
2829 run without an operating system.
2831 * `printf', `scanf' and friends now accept a `q' type modifier for long
2832 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
2834 * All of the code taken from BSD (notably most of the math and networking
2835 routines) has been updated from the BSD 4.4-Lite release.
2837 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
2839 * The new functions `getdomainname' and `setdomainname' fetch or change the
2840 YP/NIS domain name. These are system calls which exist on systems which
2843 * The time zone data files have been updated for the latest international
2846 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
2847 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
2851 * The C library now includes support for Sun RPC, from Sun's free
2852 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
2853 are included. (There is still no support for YP.)
2855 * Tom Quinn has contributed a port of the C library to SGI machines running
2856 Irix 4 (mips-sgi-irix4).
2858 * The new `lockf' function is a simplified interface to the locking
2859 facilities of `fcntl', included for compatibility.
2861 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
2863 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
2865 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
2868 * The error message printed by `assert' for a failed assertion now includes
2869 the name of the program (if using GNU ld) and the name of the calling
2870 function (with versions of GCC that support this).
2872 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
2874 * The library now includes the <sys/mman.h> header file and memory
2875 management functions `mmap', `munmap', `mprotect', `msync', and
2876 `madvise', on systems that support those facilities.
2878 * The interface for `mcheck' has changed slightly: the function called to
2879 abort the program when an allocation inconsistency is detected now takes
2880 an argument that indicates the type of failure. The new function
2881 `mprobe' lets you request a consistency check for a particular block at
2882 any time (checks are normally done only when you call `free' or `realloc'
2885 * It is now possible to easily cross-compile the C library, building on one
2886 system a library to run on another machine and/or operating system. All
2887 you need to do is set the variable `HOST_CC' in `configparms' to the
2888 native compiler for programs to run on the machine you are building on (a
2889 few generator programs are used on Unix systems); set `CC' to the
2892 * The new function `fexecve' (only implemented on the GNU system) executes
2893 a program file given a file descriptor already open on the file.
2897 * Brendan Kehoe has contributed most of a port to the DEC Alpha
2898 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
2900 * You can set the variable `libprefix' in `configparms' to specify a prefix
2901 to be prepended to installed library files; this makes it easy to install
2902 the GNU C library to be linked as `-lgnuc' or whatever.
2904 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
2905 copies a limited number of characters from a string, and returns the
2906 address of the last character written.
2908 * You no longer need to check for whether the installed `stddef.h' is
2909 compatible with the GNU C library. configure now checks for you.
2911 * You can now define a per-stream `fileno' function to convert the
2912 stream's cookie into an integral file descriptor.
2914 * ``malloc (0)'' no longer returns a null pointer. Instead, it
2915 allocates zero bytes of storage, and returns a unique pointer which
2916 you can pass to `realloc' or `free'. The behavior is undefined if
2917 you dereference this pointer.
2919 * The C library now runs on Sony NEWS m68k machines running either
2920 NewsOS 3 or NewsOS 4.
2922 * The new `syscall' function is a system-dependent primitive function
2923 for invoking system calls. It has the canonical behavior on Unix
2924 systems, including unreliable return values for some calls (such as
2925 `pipe', `fork' and `getppid').
2927 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
2928 to `EAGAIN', which is the preferred name. On systems whose kernels
2929 use two distinct codes, the C library now translates EWOULDBLOCK to
2930 EAGAIN in every system call function.
2934 * The GNU C Library Reference Manual is now distributed with the library.
2935 `make dvi' will produce a DVI file of the printed manual.
2936 `make info' will produce Info files that you can read on line using C-h i
2937 in Emacs or the `info' program.
2938 Please send comments on the manual to bug-glibc-manual@gnu.org.
2940 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
2942 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
2944 * Jason Merrill has contributed a port to the Sequent Symmetry running
2945 Dynix version 3 (i386-sequent-dynix).
2947 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
2948 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
2950 * New function `memory_warnings' lets you arrange to get warnings when
2951 malloc is running out of memory to allocate, like Emacs gives you.
2953 * The C library now contains the relocating allocator used in Emacs 19 for
2954 its editing buffers. This allocator (ralloc) minimizes allocation
2955 overhead and fragmentation by moving allocated regions around whenever it
2956 needs to. You always refer to a ralloc'd region with a "handle" (a
2957 pointer to a pointer--an object of type `void **').
2959 * There is a new `printf' format: `%m' gives you the string corresponding
2960 to the error code in `errno'.
2962 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
2963 or `%[' conversion, but instead of filling in a fixed-sized buffer you
2964 pass, the `a' modifier says to fill in a `char **' you pass with a
2967 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
2968 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
2969 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
2971 * `mkstemp' is a traditional Unix function to atomically create and open a
2972 uniquely-named temporary file.
2976 * The standard location for the file that says what the local timezone is
2977 has changed again. It is now `/usr/local/etc/localtime' (or more
2978 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
2980 * The distribution no longer contains any files with names longer than 14
2983 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
2984 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
2986 * New functions `ttyslot' and `syslog' from 4.4 BSD.
2990 * The configuration process has changed quite a bit. The `configure'
2991 script is now used just like the configuration scripts for other GNU
2992 packages. The `sysdeps' directory hierarchy is much rearranged.
2993 The file `INSTALL' explains the new scheme in detail.
2995 * The header files no longer need to be processed into ANSI C and
2996 traditional C versions. There is just one set of files to install, and
2997 it will work with ANSI or old C compilers (including `gcc -traditional').
2999 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
3000 MIPS DECStation running Ultrix 4.
3002 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
3003 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
3004 made itself into a shared library.
3006 * Yet further improved support for the i386, running 4.3 BSD-like systems
3007 (such as Mach 3 with the Unix single-server), or System V.
3009 * New function `strncasecmp' to do case-insensitive string comparison
3010 with limited length.
3012 * New function `strsep' is a reentrant alternative to `strtok'.
3014 * New functions `scandir' and `alphasort' for searching directories.
3016 * New function `setenv' is a better interface to `putenv'.
3018 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
3019 function for traversing a directory tree.
3021 * The GNU obstack package is now also part of the C library.
3022 The new function `open_obstack_stream' creates a stdio stream that
3023 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
3024 formatted output directly to an obstack.
3026 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
3027 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
3029 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
3031 * The new functions `strfry' and `memfrob' do mysterious and wonderful
3032 things to your strings.
3034 * There are some new test programs: test-fseek, testmb, and testrand.
3036 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
3037 These ports are not finished, but are a good starting place for really
3038 supporting those systems.
3040 * `/etc/localtime' is now the standard location for the file that says what
3041 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
3042 This follows the general principle that `/etc' is the place for all local
3043 configuration files.
3045 * The C library header files now use `extern "C"' when used by the C++
3046 compiler, so the C library should now work with C++ code.
3048 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
3049 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
3052 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
3053 function which uses the `merge sort' algorithm, and is said to be
3054 significantly faster than the old GNU `qsort' function. Merge sort is
3055 now the standard `qsort' function. The new algorithm can require a lot
3056 of temporary storage; so, the old sorting function is called when the
3057 required storage is not available.
3059 * The C library now includes Michael Glad's Ultra Fast Crypt, which
3060 provides the Unix `crypt' function, plus some other entry points.
3062 * The code and header files taken from 4.4 BSD have been updated with the
3063 latest files released from Berkeley.
3065 ----------------------------------------------------------------------
3066 Copyright information:
3068 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3070 Permission is granted to anyone to make or distribute verbatim copies
3071 of this document as received, in any medium, provided that the
3072 copyright notice and this permission notice are preserved,
3073 thus giving the recipient permission to redistribute in turn.
3075 Permission is granted to distribute modified versions
3076 of this document, or of portions of it,
3077 under the above conditions, provided also that they
3078 carry prominent notices stating who last changed them.
3081 version-control: never