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-Ofast is just an option, that works with icc, gcc and clang 3.3. Maybe for gcc 4.8 it includes only "-O3 -ffast-math", but it can be changed in any moment.
by Lockal 13y ago
-Ofast is just an option, that works with icc, gcc and clang 3.3. Maybe for gcc 4.8 it includes only "-O3 -ffast-math", but it can be changed in any moment.