On Sat, 6 Dec 2008, Tim Kientzle wrote:
> Make the GCC-specific __dead2 markers conditional on whether
> we're compiling under GCC.
These are FreeBSD-specific. __dead is 4.4BSD-specific, but hasn't
done anything since gcc-1.x. Though I added __dead2 to support
gcc-2 in 1994, 4.4BSD didn't have it, and NetBSD 4 years ago doesn't
define it or otherwise support the noreturn attribute in <sys/cdefs.h>.