svn commit: r287217 - head/usr.sbin/syslogd

[Joerg Sonnenberger]

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