How do I define a preprocessor variable through CMake?
The equivalent code would be #define foo.
How do I define a preprocessor variable through CMake? The equivalent code would be
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How do I define a preprocessor variable through CMake?
The equivalent code would be #define foo.
For a long time, CMake had the
add_definitionscommand for this purpose. However, recently the command has been superseded by a more fine grained approach (separate commands for compile definitions, include directories, and compiler options).An example using the new add_compile_definitions:
Or:
The good part about this is that it circumvents the shabby trickery CMake has in place for
add_definitions. CMake is such a shabby system, but they are finally finding some sanity.Find more explanation on which commands to use for compiler flags here: https://cmake.org/cmake/help/latest/command/add_definitions.html
Likewise, you can do this per-target as explained in Jim Hunziker’s answer.