GNU Compiler Collection (GCC) Rebased to 7.1

The 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 Changes, New Features, and Fixes in the GCC 7 Release Series.

Developers should see Porting to GCC 7 for detailed information on how to update their codebases to work with the new compilers.

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:

  • Additional support for floating-point extensions for C (TS 18661-1:2014) including new functions like strfromd, strfromf, and strfroml.

  • 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 getentropy and getrandom functions, and the <sys/random.h> header file, have been added.

  • GDB pretty printers have been added for mutex and condition variable structures in POSIX Threads.

  • Tunables feature added to allow tweaking of the runtime for an application program.

  • New improved algorithms for condition variables and read-write locks for POSIX Threads.

  • Security fixes for CVE-2016-6323, and CVE-2015-5180.

Detailed release are available as part of the upstream release notice.