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 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
explicit_bzero, from OpenBSD, has been added to
libc. It is intended to be used instead of
memset() to erase sensitive data after use.
getrandom functions, and the
<sys/random.h> header file, have been added.
GDB pretty printers have been added for
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.
Detailed release are available as part of the upstream release notice.