Project:Toolchain/Support policies

GCC

 * The latest version of each major GCC release is kept in the tree, i.e., 4.7.4, 4.8.5, 4.9.4, 5.4.0, 6.4.0; no removals of old versions
 * You should be able to build any old in-tree GCC version with the one two steps younger, and vice versa
 * Security fixes are backported to all unmasked versions, if possible.
 * Bug fixes are backported to the newest stable version, if possible.

GLIBC

 * Old versions are removed slowly, with ~5-6 major versions kept in the tree.
 * Security fixes are backported to all unmasked versions, if possible.
 * Bug fixes are backported to the newest stable version, if possible.