So, it compiles with altivec extension ?!
I knew about a patch to enclose altivec support in gcc for linux ppc, so I was not sure if macintosh bundle was already packaged with it.
Propolice is another extension (not as processor dependant as altivec, MMX, 3D Now! etc.) that protect from smashing the stack attack.
I think it's from ibm but not sure about that.