c++cmake

How to clear all defines from CMake?

I have project where I need some specific preprocessor definitions. Nothing less, nothing more. I tried various solutions:

set(DEFINES MY_DEFINE)
target_compile_definitions(my_target PRIVATE ${DEFINES})

and

set(DEFINES -DMY_DEFINE)
add_definitions(${DEFINES})

even

set(DEFINES MY_DEFINE)
set_property(TARGET my_target PROPERTY CACHE COMPILE_DEFINITIONS ${DEFINES})

Every time CMake still injects some other defines:

WIN32
_WINDOWS
CMAKE_INTDIR="$(CONFIG)"

My target is a static library and generator is Visual Studio 2015, in case it matters. How can I get CMake to set only my defines?

Solution

  • Since those are platform specific defines in CMake, you can only remove them "globally" for your current CMakeList.txt scope (not for an idividual target) with something like:

    string(REGEX REPLACE "(-D|/D)[^ ]* " "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")

    Reference