How do I temporarily disable a macro expansion in C/C++?

Question

For some reason I need to temporarily disable some macros in a header file and the #undef MACRONAME will make the code compile but it will undef the existing ma

Answer 1

The macros come from some header file, so you should have access to their values. You can then do something like

#include  // declares macro FOO

// Do things with FOO

#undef FOO

// do things without FOO

#include  // reenable FOO

Your header should then be designed along these lines

#ifndef FOO
#define FOO do_something(x,y)
#endif