This release branch is 8½ years old and hasn’t received an update
in 6 years. Nothing in the Nixpkgs tree uses it. We can simplify a
lot of logic in the GCC and cc-wrapper derivations by removing this
unsupported version.
gcc-4.9.4 was released in Aug 3, 2016, 8 years ago. It's a branch that
went out of support years ago. Numerous bugs never get backported to
this version.
Let's remove it.
gcc-4.8.5 was released in June 23, 2015, 9 years ago. It's a branch that
went out of support years ago. Numerous bugs never get backported to
this version.
Let's remove it.