On 2017/2/13 9:59, Jeffrey Walton wrote:
For x86 machines, you often want to use 'gcc -march=native -dM -E
</dev/null | sort' (or similar). The '-march=native' is important to
get most of the defines for the native machine.
I know a few of them and am wondering whether they are subject to change
in future releases.
I can only say "most of the defines" because I know some of them are
omitted, like __MOVBE__, even when the processor supports it. To see
__MOVBE__ in the list, yo have to check /proc/cpuinfo and then add
-mmovbe if the cpu feature flag is set.
Good to know. Thank you.
--
Best regards,
LH_Mouse
