Portable UNUSED parameter macro used on function signature for C and C++

Question

I\'m interested in creating a macro for eliminating the unused variable warning.

This question describes a way to suppress the unused parameter warning by writing a

Answer 1

Just one small thing, better using __attribute__((__unused__)) as __attribute__((unused)), because unused could be somewhere defined as macro, personally I had a few issues with this situation.

But the trick I'm using is, which I found more readable is:

#define UNUSED(x) (void)x;

It works however only for the variables, and arguments of the methods, but not for the function itself.