GLibC Changelog

What's new in GLibC 2.17

• Optimization of memcpy for MIPS.
• CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
• EMFILE has been fixed (Bugzilla #14889).
• The add-on ports collection is now distributed in the "ports" subdirectory
• of the main GNU C Library distribution, rather than separately.
• Port to ARM AArch64 contributed by Linaro.
• Support for STT_GNU_IFUNC symbols added for s390 and s390x.
• Optimized versions of memcpy, memset, and memcmp added for System z10 and
• zEnterprise z196.
• Implemented by Andreas Krebbel.
• The new function secure_getenv allows secure access to the environment,
• returning NULL if running in a SUID/SGID process.This function replaces
• the internal function __secure_getenv.
• SystemTap static probes have been added into the dynamic linker.
• Implemented by Gary Benson.
• Optimizations of string functions strstr, strcasestr and memmem.
• Implemented by Maxim Kuvyrkov.
• The minimum Linux kernel version that this version of the GNU C Library
• can be used with is 2.6.16.
• Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
• powerpc POWER7.Implemented by Will Schmidt.
• New configure option --disable-nscd builds the C library such that it
• never attempts to contact the Name Service Caching Daemon (nscd).
• New configure option --disable-build-nscd avoids building nscd itself;
• this is the default if --disable-nscd is used.
• Improved support for cross-compilation, including cross-testing and
• bootstrap builds without a previously built glibc.
• Several testsuite tests are now able to test multiple IFUNC variants of an
• interface, rather than just testing the one that would be chooen by
• default.
• New configure options --with-bugurl and --with-pkgversion, for
• distributors to use to embed their bug-reporting and package version
• information in --help and --version output.
• The ttyname and ttyname_r functions on Linux now fall back to searching for
• the tty file descriptor in /dev/pts or /dev if /proc is not available.This
• allows creation of chroots without the procfs mounted on /proc.
• The `crypt' function now fails if passed salt bytes that violate the
• specification for those values.On Linux, the `crypt' function will
• consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
• enabled, and fail on encrypted strings using the MD5 or DES algorithm
• when the mode is enabled.
• The `clock_*' suite of functions (declared in ) is now available
• directly in the main C library.Previously it was necessary to link with
• -lrt to use these functions.This change has the effect that a
• single-threaded program that uses a function such as `clock_gettime' (and
• is not linked with -lrt) will no longer implicitly load the pthreads
• library at runtime and so will not suffer the overheads associated with
• multi-thread support in other code such as the C++ runtime library.
• New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
• sat_IN, and szl_PL.