Fix _exit for Linux

[Alexandre Oliva]

On Sep 16, 2002, Andreas Jaeger <aj@suse.de> wrote:

> +libc_hidden_def (_exit)

Hmm.  I don't think this is right.  libc_hidden_proto (_exit) is
commented out in include/unistd.h, so, if my understanding is correct,
libc_hidden_def (_exit) is not guaranteed to have the right effect.
In fact, it fails to link libc.so on mips-linux, not only because
_exit ends up undefined, but also because INLINE_SYSCALL has no
arch-specific definition on mips, and we end up with a call to
__syscall_exit, that does not exist.  I've tweaked the syscall file
such that a definition for __syscall_exit is generated, but this was
not enough to get _exit() to be defined, so the link of libc.so still
failed.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer