how to read variables from CMakeLists.txt to cpp file [duplicate]

Question

if (WITH_TEST)
    add_subdirectory(test/unitTesting)
endif(WITH_TEST)

How do you read the with_test variable in a .cpp file?

Badr El Hiouel · Accepted Answer · 2019-06-11 12:34:23Z

0

A solution could be to add preprocessor definition.

in your CMakeLists :

add_definitions(-DWITH_TEST_VALUE ="${WITH_TEST}")

And in you source code you could do something like this :

#ifdef WITH_TEST_VALUE
constexpr auto WITH_TEST = WITH_TEST_VALUE;
#else
 // something 
#endif

answered Jun 11, 2019 at 12:34

Badr El Hiouel

3112 silver badges10 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

cmake -DWITH_TEST=ON ../ when it compiles it gives error i.e c++: error: =ON: No such file or directory