__OPTIMIZE__

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GNU CC defines this macro in optimizing compilations. Along with __OPTIMIZE_SIZE__ and __NO_INLINE__, it allows certain header files to define alternative macro definitions for some system library functions. You should not refer to or test the definition of this macro unless you make very sure that programs will execute with the same effect regardless. If it is defined, its value is 1.


See also: __OPTIMIZE_SIZE__, __NO_INLINE__