How to correctly determine the `-march` flag when working with Intel oneAPI on Intel processors?

[Hongyi]

@msz59

You can find the proper codename in the first line of inxi -Cxxx output:

arch: Broadwell

thus, use -march=broadwell
If not available you can always leave the detection of the proper family to the compiler, using -march=native

Wonderful advice. Based on your above comment, I’ve confirmed that both of the following settings solve the problem discussed here:

FFLAGS += -march=broadwell

or

FFLAGS += -march=native

Regards,
HZ