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glibc

The GNU C library.

Other Activity This Week

Add support for GCC 9 attribute copy
Martin Sebor: GCC 9 has gained an enhancement to help detect attribute mismatches between alias declarations and their targets.

Replace conformtest.pl with conformtest.py
Joseph Myers: Continuing the consolidation on Python for various miscellaneous build and test scripts, this patch moves conformtest from Perl to Python. The substance of the tests run is intended to be the same as before, except that the previous test for tags did not actually achieve the intended purpose of verifying whether a tag was already declared, so is changed to one that would actually fail for a tag that wasn't declared, and a typo in the old test for variables being available ($xyzzy instead of xyzzy) would have made that test not use the correct type (but it would have passed anyway with warnings).

Recent Activity

Add support for GCC 9 attribute copy
Martin Sebor: GCC 9 has gained an enhancement to help detect attribute mismatches between alias declarations and their targets.

Replace conformtest.pl with conformtest.py
Joseph Myers: Continuing the consolidation on Python for various miscellaneous build and test scripts, this patch moves conformtest from Perl to Python. The substance of the tests run is intended to be the same as before, except that the previous test for tags did not actually achieve the intended purpose of verifying whether a tag was already declared, so is changed to one that would actually fail for a tag that wasn't declared, and a typo in the old test for variables being available ($xyzzy instead of xyzzy) would have made that test not use the correct type (but it would have passed anyway with warnings).

soft-fp: Add implementation for 128 bit self-contained
Zong Li: Here only add the implementation when building the RV32 port. These macros are used when the following situations occur at the same time: soft-fp fma, ldbl-128 and 32-bit _FP_W_TYPE_SIZE.

Update and correct SPARC configuration for supported socket syscalls (bug 23848).
Joseph Myers: Looking at kernel-features.h files, I saw that SPARC was missing full information on when it gained separate socket syscalls. This patch adds such information to the SPARC kernel-features.h.

Remove pre-Python-3.4 compatibility from build-many-glibcs.py
Joseph Myers: Since we have consensus on requiring Python 3.4 or later to build glibc, it follows that compatibility with older Python versions is also no longer relevant to auxiliary Python scripts for use in glibc development.

Add IN_MASK_CREATE from Linux 4.19 to sys/inotify.h
Joseph Myers: This patch adds the IN_MASK_CREATE macro from Linux 4.19 to sys/inotify.h.

Add new ELF note types from Linux 4.19 to elf.h
Joseph Myers: This patch adds NT_MIPS_DSP and NT_MIPS_FP_MODE from Linux 4.19 to elf.h. Tested for x86_64. - elf/elf.h (NT_MIPS_DSP): New macro.

Use gen-libm-test.py to generate ulps table for manual
Joseph Myers: This patch extends gen-libm-test.py to generate the ulps table for the manual, so meaning there is only a single ulps file parser needed and another Perl script is eliminated.

Y2038: Add 64-bit time for all architectures
Albert ARIBAUD (3ADEV): glibc support for 64-bit time_t on 32-bit architectures will involve: - Using 64-bit times inside glibc, with conversions to and from 32-bit times taking place as necessary for interfaces using such times. - Adding 64-bit-time support in the glibc public API.

x86: Support RDTSCP for benchtests
H.J. Lu: RDTSCP waits until all previous instructions have executed and all previous loads are globally visible before reading the counter.

glibc Release Tags

Open master branch for glibc 2.29 development
Carlos O'Donell

Update for 2.25 release
Siddhesh Poyarekar

Update version.h and include/features.h for 2.22 release
Carlos O'Donell

Restore _POSIX2_C_VERSION definition (bug 438).
Joseph Myers: My review of conformtest expectations for POSIX showed up that the _POSIX2_C_VERSION macro, required by POSIX and XPG standards before 2001, was missing in unistd.h, having been removed on 2003-04-03 despite those standards still being supported.

Bump required version of texinfo to 4.7
Will Newton: It seems we require texinfo 4.7 for the --plaintext option, so document that and check for the correct version in configure. ChangeLog: 2014-12-15 Will Newton - manual/install.texi: Bump required version of texinfo to 4.7 from 4.5. - INSTALL: Regenerated. - configure.ac: Check for makeinfo version 4.7 and above. - configure: Regenerated.

Rework compiler version check in configure
Roland McGrath

Update version.h and include/features.h for 2.19 release
Allan McRae

Accept make versions 4.0 and greater
Marc-Antoine Perennou

Update version.h and include/features.h for 2.18 release
David S. Miller

Make _LIB_VERSION a weak symbol
Siddhesh Poyarekar: That way it can live alongside _LIB_VERSION in libieee.a for statically compiled programs.

Most Popular In The Past Month

aarch64: optimized memcpy implementation for thunderx2
Anton Youdkevitch: Since aligned loads and stores are huge performance advantage the implementation always tries to do aligned access.

Use gen-libm-test.py to generate ulps table for manual
Joseph Myers: This patch extends gen-libm-test.py to generate the ulps table for the manual, so meaning there is only a single ulps file parser needed and another Perl script is eliminated.

Add new ELF note types from Linux 4.19 to elf.h
Joseph Myers: This patch adds NT_MIPS_DSP and NT_MIPS_FP_MODE from Linux 4.19 to elf.h. Tested for x86_64. - elf/elf.h (NT_MIPS_DSP): New macro.

Y2038: Add 64-bit time for all architectures
Albert ARIBAUD (3ADEV): glibc support for 64-bit time_t on 32-bit architectures will involve: - Using 64-bit times inside glibc, with conversions to and from 32-bit times taking place as necessary for interfaces using such times. - Adding 64-bit-time support in the glibc public API.

x86: Support RDTSCP for benchtests
H.J. Lu: RDTSCP waits until all previous instructions have executed and all previous loads are globally visible before reading the counter.

Update kernel version in syscall-names.list to 4.19.
Joseph Myers: Linux 4.19 does not add any new syscalls (some existing ones are added to more architectures); this patch updates the version number in syscall-names.list to reflect that it's still current for 4.19.

Add support for GCC 9 attribute copy
Martin Sebor: GCC 9 has gained an enhancement to help detect attribute mismatches between alias declarations and their targets.

Remove pre-Python-3.4 compatibility from build-many-glibcs.py
Joseph Myers: Since we have consensus on requiring Python 3.4 or later to build glibc, it follows that compatibility with older Python versions is also no longer relevant to auxiliary Python scripts for use in glibc development.

Update and correct SPARC configuration for supported socket syscalls (bug 23848).
Joseph Myers: Looking at kernel-features.h files, I saw that SPARC was missing full information on when it gained separate socket syscalls. This patch adds such information to the SPARC kernel-features.h.

soft-fp: Add implementation for 128 bit self-contained
Zong Li: Here only add the implementation when building the RV32 port. These macros are used when the following situations occur at the same time: soft-fp fma, ldbl-128 and 32-bit _FP_W_TYPE_SIZE.

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