Re: which configuration changes for x86_64-v2+ necessary?

On 28/09/2022 02.29, Aaron Puchert wrote:

I would love to see some kind of assembly diff for building the whole distribution with x86_64-v2, but this might be pretty hard. Perhaps Bernhard might be able to do this using the reproducible builds infrastructure.

I have seen software use -march=native and that always differed. In any non-trivial code, the compiler will find places where newer instructions can be used. Just for the hello-world, it produced the same assembly with gcc-11 -O2 -march=x86-64-v2 -S hello.c Ciao Bernhard M.