Link-Time Optimization [PART IV]

gcc's LTO needs JEWS binutils-gold, Unless you feel like going --combine -fwhole-program. Clang/LLVM don't do it correctly due to some gold problems (some unused functions don't get eliminated); the other way is to use "llc", but then you can't eliminate the functions that aren't used.

Dammit.

Clang/LLVM will probably have their issues fixed by the end of the year.