My project can be compiled with support for graphics, or in a completely headless mode with no dependencies on any graphics libraries. By and large, this is accomplished with the same source code and a very few #define 's.
We also have an API/Library mode with no main(), but that can have graphics or not. I'd like to use CMake to compile both versions of these in one go. However, I don't see any way to make a -DFOO for just a single file, or to compile two versions of a single object to then be used later. I think the workaround will be to have two CMakeLists.txt a level deeper than the file with main(). \maindir CMakeLists.txt_1 main.cpp \maindir\graphics CMakeLists.txt_2 \maindir\headless CMakeLists.txt_3 Where... CMakeLists.txt_1 is basically: add_directory( graphics ) add_directory( headless ) And then _2 and _3 set the -DFOO at their level and include the source with a ../main.cpp Is there another/better way? Rob
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