further use of _Noreturn, for non-plain-C functions

note that POSIX does not specify these functions as _Noreturn, because
POSIX is aligned with C99, not the new C11 standard. when POSIX is
eventually updated to C11, it will almost surely give these functions
the _Noreturn attribute. for now, the actual _Noreturn keyword is not
used anyway when compiling with a c99 compiler, which is what POSIX
requires; the GCC __attribute__ is used instead if it's available,
however.

in a few places, I've added infinite for loops at the end of _Noreturn
functions to silence compiler warnings. presumably
__buildin_unreachable could achieve the same thing, but it would only
work on newer GCCs and would not be portable. the loops should have
near-zero code size cost anyway.

like the previous _Noreturn commit, this one is based on patches
contributed by philomath.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/unistd/_exit.c b/src/unistd/_exit.c
index d2e84c4c..76994823 100644
--- a/src/unistd/_exit.c
+++ b/src/unistd/_exit.c
@@ -1,7 +1,7 @@
 #include <unistd.h>
 #include <stdlib.h>
 
-void _exit(int status)
+_Noreturn void _exit(int status)
 {
 	_Exit(status);
 }