This is a C/C++ project. I want to exclude a particular compilation target (say “xyz”) from my setup. There are macros already in place for that (say, XYZ), which I have successfully set to OFF so that the sources are not included.

I want to design some cmake cache entry as alias from the automake/autoconf like CC to CMAKE_C_COMPILER, CXX to CMAKE_CXX_COMPILER, CFLAGS to CMAKE_C_FLAGS etc, but cmake always ignore my passed -D entrys on the compiler names insert to the first configuration.