>> I searched for a way to set gcc's -march globally, for the whole distro, >> is this possible with guix ? > > It’s possible, but inconvenient: you’d have to modify (guix build > gnu-build-system), or to add a GCC wrapper that appends “-march=foo”.
OK thanks, I'll try it > However, because you’d be building things differently, you wouldn’t be > able to use substitutes provided by mirror.hydra.gnu.org. > > Likewise, binaries built on your machine may be unusable on other > machines, if you use -march=native or similar. Yes, I know the consequences, I'm not distributing the resulting system. -- Vincent Legoll