How to define a C++ preprocessor macro through the command line with CMake?

by

A good alternative would be to define a cmake option:

OPTION(DEFINE_MACRO "Option description" ON) # Enabled by default

Followed by a condition:

IF(DEFINE_MACRO)
    ADD_DEFINITIONS(-DMACRO)
ENDIF(DEFINE_MACRO)

Then you can turn that option ON/OFF via command line with cmake using the -D flag. Example:

cmake -DDEFINE_MACRO=OFF ..

To make sure the compiler is receiving the definition right, you can call make in verbose mode and check for the macro being defined or not:

make VERBOSE=1

This is a good solution also because make will recompile your code when any of cmake options changes.

More Related Contents:

  1. How to properly add include directories with CMake
  2. How to link C++ program with Boost using CMake
  3. Debug vs Release in CMake
  4. Combining several static libraries into one using CMake
  5. How to properly link libraries with cmake?
  6. Using CMake with multiple compilers for the same language
  7. Error LNK1104: cannot open file ‘Debug\MyProjectLib.lib’
  8. OS specific instructions in CMAKE: How to?
  9. How to create a shared library with cmake?
  10. Override compile flags for single files
  11. CMake unable to determine linker language with C++
  12. CMake: include library dependencies in a static library
  13. CMake linking against shared library on windows: error about not finding .lib file
  14. How do I use CMake?
  15. CMake does not find Visual C++ compiler
  16. CMake ExternalProject_Add() and FindPackage()
  17. In CMake, how can I test if the compiler is Clang?
  18. How to use c++20 modules with CMake?
  19. cmake include header into every source file
  20. How to build cmake ExternalProject while configurating main one?
  21. Handling header files dependencies with cmake
  22. How to handle a transitive dependency conflict using Git submodules and CMake?
  23. Add external libraries to CMakeList.txt c++
  24. How do I iterate over all CMake targets programmatically?
  25. cmake – Global linker flag setting (for all targets in directory)
  26. preferred cmake project structure
  27. What is the difference between include_directories and target_include_directories in CMake?
  28. Using pre-compiled headers with CMake
  29. How to use CMAKE_EXPORT_COMPILE_COMMANDS?
  30. The proper way of forcing a 32-bit compile using CMake

Leave a Comment