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Oct 5, 2018for -o0, whether -march=native or -march= is the default still specifies the same family, so both are perfectly compatibly with -o0; Oct 12, 2024-march=foo implies -mtune=foo unless you also specify a different -mtune. This is one reason why using -march is better than just enabling options like -mavx without doing.

As i understand it, -march=native will detect the isa and extensions to use from cpuid (which include model, family and stepping information). -march=xxx will use a baseline set of. Gcc 4.2 and above support -march=native.

-march=native applies additional settings beyond -march, specific to your cpu.. Jul 27, 2022what are the differences and tradeoffs between -march=haswell, -march=core-avx2, and -mavx2 for compiling avx2 intrinsics? On clang/linux, we can use -march=native to automatically detect the.

Nov 5, 2018is there a way to get gcc to output the available -march=arch options? I'm getting build errors (tried -march=x86_64) and i don't know what my options are. Use -march=compatibility for best compatibility, or .