http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33135
--- Comment #4 from Oleg Endo <olegendo at gcc dot gnu.org> 2012-07-16 20:50:50 UTC --- (In reply to comment #3) > I guess that the better default would be -mno-ieee for bare metals Hm ... Is there a particular reason to distinguish between linux and non-linux? I was actually thinking of tying -mno-ieee to -ffinite-math-only in the following way: no options -> implicit -fno-finite-math-only -mieee -ffinite-math-only -> disable ieee fcmp, allow other optimizations -ffinite-math-only -mieee -> enable ieee fcmp, allow other optimizations -mno-ieee -> disable ieee fcmp, disallow other optimizations I think if faster FPU code is desired, most likely the -ffast-math (or some sub-option like -ffinite-math-only) will be consulted in the first place. In case of bare metal configurations, users will probably tweak their specific options. Thus, I did not want to distinguish between linux or non-linux here.
