Enable interprocedural optimization for a target.
If set to true, enables interprocedural optimizations if they are known to be supported by the compiler. Depending on value of policy CMP0069, the error will be reported or ignored, if interprocedural optimization is enabled but not supported.
This property is initialized by the CMAKE_INTERPROCEDURAL_OPTIMIZATION variable if it is set when a target is created.
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https://cmake.org/cmake/help/v3.19/prop_tgt/INTERPROCEDURAL_OPTIMIZATION.html