On Fri, Aug 28, 2015 at 10:17:56PM +1000, Bruce Evans wrote: > >-static void die(int); > >+static void die(int) __dead2; > > Since the function is static, it is very easy for the compiler to see > that it doesn't return.
But the compiler can't tell if it is the *intention* that the function never returns. The warning behavior exists because that can easily change with macros etc. > Even gcc-4.2.1 does this by default, since > -O implies -funit-at-a-time for gcc-4.2.1. For clang, there is no way > to prevent this (except possibly -O0) since, since -fno-unit-at-a-time > is broken in clang. It is not broken. It is loadly ignored as unsupported. The very existance of the option in GCC has always been a concession to broken and badly written code, including of course GCC's own CRT. Joerg _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
