Joseph Garvin <joseph.h.garvin@xxxxxxxxx> writes: > In the docs here: > > http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html > > It says that 'mtune' doesn't affect ABI, but it doesn't specify if > 'march' does or not. Will -march=i386 compiled libraries link against > -march=i686 compiled apps? Also if any devs read this maybe you could > update the docs to clarify this for future users? ;) The -march option does not affect the ABI in the sense that files with different -march options will link together with no problems. It does affect the ABI in the sense that if you link an object compiled with -march=i686 into your program, the program may not run on a system which only has a vanilla i386. Ian
