Suppress Compiler warning Function declared never referenced
c, c++, gcc, gcc-warning
Solution
...then I started to wonder if there was a different way to suppress that warning on that function.
There might be compiler option(s) to suppress this warning. However, one trick is this:
(void)foo; //cast it to void.
It should suppress this warning.
You could write a macro:
#define SUPPRESS_WARNING(a) (void)a
void foo(int thisIsAlsoAnUnsedParameter, int usedParameter)
{
SUPPRESS_WARNING(foo); //better do this inside the definition itself :D
SUPPRESS_WARNING(thisIsAlsoAnUnsedParameter);
}
As you can see, the definition of `foo` itself suppresses the warning.
Problem
So i have some code like this: ``` void foo (int, int); void bar ( ) { //Do Stuff #if (IMPORTANT == 1) foo (1, 2); #endif } ``` When doing a compile without "IMPORTANT" I get a compiler Warning that foo is defined and never referenced. Which got me thinking (that is the problem). So to fix this i just added the same `#if (IMPORTANT == 1)` around the function definition etc... to remove the warning, and then I started to wonder if there was a different way to suppress that warning on that function. I was looking at "unused" GCC attrib and didn't know if functions had the same attribute i could set? Is there even another way to suppress it that suppresses that warning for only that function and not the file?