Whether to add a compile flag to hide symbols of inline functions

The VISIBILITY_INLINES_HIDDEN property determines whether a flag for hiding symbols for inline functions, such as -fvisibility-inlines-hidden, should be used when invoking the compiler. This property affects compilation in sources of all types of targets (subject to policy CMP0063).

This property is initialized by the value of the CMAKE_VISIBILITY_INLINES_HIDDEN variable if it is set when a target is created.