On Wed, Dec 03, 2003 at 10:41:05 +0000, Mike Rawes wrote: > -O2 will include the -fstrict-aliasing flag for gcc, so it's turned on here. > I've no idea what -O6 does (intel compiler, pgcc?). -O3 is the highest in the > gcc documentation.
-O6 is historical, I just keep it in cos it doesnt hurt. Interesting that -O2 turns on strict aliasing... that changes the semantics of ANSI C, though I've a feeling that C99 might specify strict aliasing. - Steve
