How to get conditional compilation of debugging / release in a C ++ program

Question

In a large C ++ / Qt / QMake / qtcreator project, I would like to run some tests, but only when I compile the flag flag.

Is there a way to tell g ++ that some small parts of the code should only be compiled in debug mode?

Answer 1

The standard way to do this is to depend on the macro NDEBUGused by the macro assert()defined in <cassert>:

#ifdef NDEBUG
  // release mode code
#else
  // debug mode code
#endif

The opposite #ifdefis equal #ifndef, and, of course, branches #elseare optional.

( - ),

• QT_NO_DEBUG, Qt Q_ASSERT();

• , NDEBUG (un) ; <cassert> , , , .