How to specify preprocessor directives for assembly in a qt project?

Question

Qt

Good afternoon.
I try to specify the directives in the .pro file via DEFINES += _some_defines but the compilation still throws an error Error: target macro not defined
Does anyone have a solution to this issue?

Answer 1

Everything is correct, in the pro file:
somewhere in the code:

#ifdef DEBUG_MODE
    qDebug() << "DEBUG_MODE";
#endif

to set the value, you can do this:
in the pro-file:
somewhere in the code:

if(DDD == 1)
{
        qDebug() << "ddd == 1";
}