When using LTO, linker is supposed to find a plugin for handling LTO in
/usr/lib/bfd-plugins . And this path is hardcoded in sources, and it's "lib"
even for 64 bit systems. However, neither GCC nor Clang/LLVM install their
plugin there. GCC doesn't do anything with its plugin except for shipping it in
its own directory, and LLVMGold is installed to /usr/lib64/bfd-plugins. So
instead of LTO simply working when using -flto, one has to use gcc-ar/llvm-ar
etc. to override the ar etc. which should work but don't because of this.

I can easily submit fixed binutils and gcc packages to make them use
/usr/lib64/bfd-plugins too, but I've first created this bugreport so that
there's just one place for referring to this issue. Also I would first like to
verify that this would indeed be the proper fix - is there any special reason
why binutils hardcodes the "lib" there?