How to create your own compilation key in C++

Question

You have your own cmake c++ project, you need to create a compilation key and get information about it in the code.

I need something like this.

in CmakeLists.txt:

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -myTest")

in *.cpp

if(KEY == "myTest"){
    // testing code.
}

By "compilation key", do you mean a preprocessor definition, like `-DKEY=myTest` — jkb, Nov 18 '19 at 06:01

score 1 · Answer 1 · edited Nov 18 '19 at 08:29

1

in CMakeLists.txt

add_compile_definitions(TESTING)
add_compile_options(-Wall)

in *.cpp

#ifdef TESTING
    std::cout << "testing" << std::endl;
#else
#endif

edited Nov 18 '19 at 08:29

Bktero

answered Nov 18 '19 at 06:14

shaman888

Modern way to add compiler option is to use add_compile_option() --> https://cmake.org/cmake/help/latest/command/add_compile_options.html?highlight=add_compile_option Modern way to add preprocessor definition is to use add_compile_definitions() --> https://cmake.org/cmake/help/latest/command/add_compile_definitions.html#command:add_compile_definitions – Bktero Nov 18 '19 at 08:27

1 Answers1