Suppress Compiler warning Function declared never referenced

Question

So i have some code like this:

void foo (int, int);

void bar ( )
{
    //Do Stuff

   #if (IMPORTANT == 1)
       foo (1, 2);
   #endif

}

Answer 1

One solution is via function attributes.

void foo (int, int) __attribute__ ((unused));

This will tell gcc not to issue an unused function warning for the function foo. If you're worried about portability, you can define a macro UNUSED_FUNCTION_ATTRIBUTE that expands to __attribute__ ((unused)) with compilers that support attributes, but expands to nothing otherwise.