In contrast to -mtune= cpu-type, which merely tunes the generated code for the specified cpu-type, -march= cpu-type allows GCC to generate code that may not run at all on processors other than the one indicated. These ‘ -m’ options are defined for the i386 and x86-64 family of computers: -march= cpu-type Generate instructions for the machine type cpu-type. Next: i386 and x86-64 Windows Options, Previous: HPPA Options, Up: Submodel Options
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