cmake / 3.6.3 / prop_tgt / interprocedural_optimization.html /

INTERPROCEDURAL_OPTIMIZATION

Enable interprocedural optimization for a target.

If set to true, enables interprocedural optimizations if they are known to be supported by the compiler.

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https://cmake.org/cmake/help/v3.6/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html