Marc Glisse <marc.glisse@xxxxxxxx> writes: > And being a system header is a property that depends on the directory > the file is in. Do you know how gcc define's "system header" ? I've noticed that I sometimes get compiler warnings for library header files, even though they're located in subdirectories of /usr/include and -Wno-system-headers is turned on... So I guess the test isn't just a simple prefix comparison with "/usr/include/" ... -Miles -- We live, as we dream -- alone....