Rohit Garg <rpg.314@xxxxxxxxx> writes: > If I wish to detect if the compiler options include -ffast-math, which > macro should I define? This is useful if I want to select which path > of the code to compile depending on my needs with just a compiler > switch. Eg. for SSE2, __SSE2__(or it's cousin) is defined. Check for __FAST_MATH__. The gcc manual documents this is in the description of -ffast-math. Ian
