[CMake] Converting QMake project to CMake

[NoRulez]

Hi,

i'm trying to convert a qmake project to CMake.
How can i translate "CONFIG" to CMake or what is the CMake's way of using the CONFIG variable? 

e.g. CONFIG += mylib

Is this the CMake equivalent: SET(mylib TRUE)

Thanks in Advance

Best Regards
NoRulez