How can I hide “defined but not used” warnings in GCC?

Question

I have a bunch of compile time asserts, such as:

CASSERT(isTrue) or CASSERT2(isTrue, prefix_)

When compiling with GCC I get many warnings l

Answer 1

This is hard to answer without knowing the details of your static assert macros. Perhaps you could change to a different macro to avoid this problem? You could either add the 'unused' attribute to the macro as was suggested, or you could use a different form of CASSERT().

Here are descriptions of a few alternatives:

http://www.jaggersoft.com/pubs/CVu11_3.html

http://blog.kowalczyk.info/kb/compile-time-asserts-in-c.html

http://www.pixelbeat.org/programming/gcc/static_assert.html

Answer 2

How about -Wunused-label ?