So on my OSX systems (Lion through Mavericks), the following option needs to be passed to gcc or g++ in order to work correctly whenever machine optimized code is enabled: -Wa,-q I believe is because of the assembly syntax that the system assembler uses by default or something like that, but that is just AFAIK, so I may be wrong. My question is: how can I tell gcc (and g++) to always use this option when executing? I thought about using the specs file, but I can't find it using 'strace gcc | grep specs' since there is no strace on OSX systems (there's dtruss, but who the hell knows how to use that). Even better, is there some way I could tell gcc this (or fix the problem in any other way) when I compile gcc from sources? Thanks, Haneef Mubarak