exists in one of a fixed set of paths (e.g., /usr/bin/cc). For
instance, on a system without /usr/bin/cc the variable DependCmd
would evaluate to "makedepend", and on a system with it, to
"gccmakedep".
Solution: just use "gcc" always. Also disabled some shitty code to
detect the current Linux distribution (by probing for files like
/etc/SuSE-release).
svn path=/nixpkgs/trunk/; revision=4534
