https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63556
--- Comment #7 from Andi Kleen <andi-gcc at firstfloor dot org> --- I'm not sure how it would speed up the linker if gcc did it. The linker would still need to do it because there might be matches between different .o files. Also linker wouldn't know if the compiler supported this or not.
