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Tunables feature added to allow tweaking of the runtime for an application program.
The GNU C Library Version 2.25
The GNU C Library in Fedora 26 has been rebased to version 2.25, which brings many improvements and bug fixes over the previous version. Notable changes include:
The `getentropy` and `getrandom` functions, and the `<sys/random.h>` header file, have been added.
The function `explicit_bzero`, from OpenBSD, has been added to `libc`. It is intended to be used instead of `memset()` to erase sensitive data after use.
The [application]*GNU Compiler Collection (GCC)* has been rebased to version 7.1, a major new release that provides a number of new features as well as many improvements and bugfixes. In addition to offering the new GCC to developers, Fedora packages have been recompiled using the new version. See link:++http://gcc.gnu.org/gcc-7/changes.html++[Changes, New Features, and Fixes in the GCC 7 Release Series].
Security fixes for link:++https://nvd.nist.gov/vuln/detail/CVE-2016-6323++[CVE-2016-6323], and link:++https://nvd.nist.gov/vuln/detail/CVE-2015-5180++[CVE-2015-5180].
New improved algorithms for condition variables and read-write locks for POSIX Threads.
GNU Compiler Collection (GCC) Rebased to 7.1
GDB pretty printers have been added for `mutex` and `condition` variable structures in POSIX Threads.
Developers should see link:++https://gcc.gnu.org/gcc-7/porting_to.html++[Porting to GCC 7] for detailed information on how to update their codebases to work with the new compilers.
Detailed release are available as part of the link:++https://sourceware.org/ml/libc-alpha/2017-02/msg00079.html++[upstream release notice].
Additional support for floating-point extensions for C (TS 18661-1:2014) including new functions like `strfromd`, `strfromf`, and `strfroml`.