I have the following situation -
I need to compile my code with two different versions of GCC (3.2 and 4.4) and wish to see all warnings and treat them as errors (it's a slippery slope otherwise). I must include header files I cannot change that include some code. This code makes the newer GCC throw warnings (like unused parameter).
If I add something like
#pragma GCC diagnostic ignored "-Wunused-parameter"
#include <bad_header.hpp>
#pragma GCC diagnostic error "-Wunused-parameter"
it solves the issue with the newer GCC but the older one is not familiar with this pragma and issues a warning (which becomes an error).
What can I do?
- Stop treating warning as errors
- Surround my pragma with some sort of version checking macro
I don't like both solutions, is there anything else I can do?
Update following Sander De Dycker's answer
My build system does not allow me to use -isystem flag with gcc
The solution I'm going to use for now (until I'll see a better one) is to wrap the GCC diagnostic pragmas with macros to check GCC version, something like