[CMake] Advice on how to remove duplicated code for object and interface library setup

[Stephen McDowell]

Hi Deniz,

Thanks for the response!  I tested it out and it seems to work exactly as you describe :)

I don’t want to depend on an un-released version of CMake though.  The original desire is because I kept making mistakes / adding definitions for one and not the other (code duplication at its finest…).

I discovered that I can populate one, e.g. only modify mylib_obj and then later grab these properties to add to the interface:

    get_target_property(MYLIB_OBJ_INTERFACE_COMPILE_DEFINITIONS mylib_obj INTERFACE_COMPILE_DEFINITIONS)

and also the same for INTERFACE_COMPILE_OPTIONS etc. (Note: for anybody reading this, understand that INTERFACE_COMPILE_DEFINITIONS is desired here, COMPILE_DEFINITIONS includes private items which I do not want in this case).

Is getting the properties and then later setting them a reasonable solution here, or is this a bad idea?

-Stephen

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