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glibc

The GNU C library.

Other Activity This Week

i386: Also add GLIBC_ABI_GNU2_TLS version [BZ #33129]
H.J. Lu: Since the GNU2 TLS run-time bug:

Recent Activity

i386: Also add GLIBC_ABI_GNU2_TLS version [BZ #33129]
H.J. Lu: Since the GNU2 TLS run-time bug:

i386: Add GLIBC_ABI_GNU_TLS version [BZ #33221]
H.J. Lu: On i386, programs and shared libraries with __thread usage may fail silently at run-time against glibc without the TLS run-time fix for:

x86-64: Add GLIBC_ABI_GNU2_TLS version [BZ #33129]
H.J. Lu: Programs and shared libraries compiled with -mtls-dialect=gnu2 may fail silently at run-time against glibc without the GNU2 TLS run-time fix for:

stdio-common: Reject significands w/o digits in scanf [BZ #12701]
Maciej W. Rozycki: Reject invalid formatted scanf real input data the significand part of which is comprised of a hexadecimal prefix followed by a decimal point only, optionally preceded by a sign.

malloc: Make sure tcache_key is odd enough
Samuel Thibault: We want tcache_key not to be a commonly-occurring value in memory, so ensure a minimum amount of one and zero bits.

malloc: Support THP in arenas
Wilco Dijkstra: Arenas support huge pages but not transparent huge pages.

NEWS: Add 2.43 section
Andreas K. Hüttel

x86-64: Compile ISA versions of modf/modff with -fno-stack-protector
H.J. Lu: Since modf and modff are compiled into both libc and libm, when glibc is configured with --enable-stack-protector=all, ISA versions of modf and modff should be compiled with -fno-stack-protector to avoid calling __stack_chk_fail via PLT in libc.so.

elf: Add SFrame stack tracing
Claudiu Zissulescu: This patch adds the necessary bits to enable stack tracing using SFrame.

aarch64: Add SFrame support for aarch64 architecture
Claudiu Zissulescu: The SFrame is supported for AArch64 architecture.

glibc Release Tags

Create ChangeLog.old/ChangeLog.31
Andreas K. Hüttel

Increase version to 2.41.9000, add new section to NEWS
Andreas K. Hüttel: ### diff --git a/NEWS b/NEWS index b11422b060..e2e40e141c 100644 --- a/NEWS +++ b/NEWS @@ -5,6 +5,33 @@ See the end for copying conditions. Please send GNU C library bug reports via <

Create ChangeLog.old/ChangeLog.30
Andreas K. Hüttel

Increase version number to 2.40.9000
Andreas K. Hüttel

Add ChangeLog file
Andreas K. Hüttel

Open master branch for glibc 2.39 development
Andreas K. Hüttel

NEWS: Fix typos
Andreas K. Hüttel

Open master branch for glibc 2.38 development
Carlos O'Donell

Create ChangeLog.old/ChangeLog.26.
Carlos O'Donell

Remove left over LD_LIBRARY_VERSION usages
Adhemerval Zanella: The environment variable was removed by d2db60d8d830ef68c8d20a77ac3572d610aa40b1.

Most Popular This Year

AArch64: Remove thunderx{,2} memcpy
Andrew Pinski: ThunderX1 and ThunderX2 have been retired for a few years now.

elf: Canonicalize $ORIGIN in an explicit ld.so invocation [BZ 25263]
Adhemerval Zanella: When an executable is invoked directly, we calculate $ORIGIN by calling readlink on /proc/self/exe, which the Linux kernel resolves to the target of any symlinks.

Disable _TIME_BITS if the compiler defaults to it
Adhemerval Zanella: Even though building glibc with 64 bit time_t flags is not supported, and the usual way is to patch the build system to avoid it; some systems do enable it by default, and it increases the requirements to build glibc in such cases (it also does not help newcomers when trying to build glibc).

AArch64: Remove SVE erf and erfc tables
Joe Ramsay: By using a combination of mask-and-add instead of the shift-based index calculation the routines can share the same table as other

tst: Extend cross-test-ssh.sh to support passing glibc tunables
Yury Khrustalev: This patch adds new flag --glibctunables to the cross-test-ssh.sh script to pass Glibc tunables to the system on which tests are executed. The value to pass can be also provided via the GLIBC_TUNABLES environment variable. This works similar to the TIMEOUTFACTOR variable. Sometimes it is useful to cross test glibc with some non-default tunable, and a global environment variable is the easiest way to inject some tunable value into most tests.

Do not use -Wp to disable fortify (BZ 31928)
Adhemerval Zanella: The -Wp does not work properly if the compiler is configured to enable fortify by default, since it bypasses the compiler driver (which defines the fortify flags in this case).

replace tgammaf by the CORE-MATH implementation
Paul Zimmermann: The CORE-MATH implementation is correctly rounded (for any rounding mode).

math: Fix incorrect results of exp10m1f with some GCC versions
Florian Weimer: On GCC 11 (x86-64), the previous code produced test failures like this one:

manual: Add Descriptor-Relative Access section
Florian Weimer: Reference this new section from the O_PATH documentation. And document the functions openat, openat64, fstatat, fstatat64.

Disable _FILE_OFFSET_BITS if the compiler defaults to it
Adhemerval Zanella: Even though building glibc with LFS flags is not supported, and the the usual way is to patch the build system to avoid it [1]; some system do enable it by default, and it increases the requirements to build glibc in such cases (it also does not help newcomers when trying to build glibc).

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