Use variable from CMAKE in C++

Question

I want to use a value declared in my CMakeLists.txt in my C++ code. I\'ve tried to do like that :

ADD_DEFINITIONS( -D_MYVAR=1 )

and

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Answer 1

Thanks to πάντα ῥεῖ

His solution works for my first question, and I've could do that :

CMakeLists.txt:

ADD_DEFINITIONS( -D_VAR=\"myValue\" )

main.cpp:

#include 

#ifdef _VAR
    #define TXT _VAR
#else
    #define TXT "nobody"
#endif

int main(){
    std::cout << "hello " << TXT << " !" << std::endl;
    return 0;
}