Warning: GCC 4.2 and above support -march=native, which automatically detects the optimum settings to use based on your processor. -march=native also detects and applies additional settings beyond -march specific to your CPU, (eg. -msse4). Unless you have a specific reason not to (e.g. distcc cross-compiling), you should probably be using -march=native rather than anything listed below.

Assuming you've got a good reason for not using the one in the big red box at the top of that page, you can do this:

代碼:

touch /tmp/null.c; gcc -c -march=native -v /tmp/null.c 2>&1 | grep march | egrep --color -- '\s-m\S+|--param \S+'

用這樣來看現在架構的 CPUTYPE。