Always include <sys/cdefs.h>.
I made a mistake caught by code review earlier, so let's try to be
safer by default.
This patch also moves all our "forwarding" headers to the guardless
just-include-the-other-thing style that we usually use. (Where we
have a comment explaining where the header comes from, I've kept
that.)
Change-Id: I37342cf5e2563c6a269b2ba61a697069b1c7913b
diff --git a/libc/include/ar.h b/libc/include/ar.h
index 835290b..413f767 100644
--- a/libc/include/ar.h
+++ b/libc/include/ar.h
@@ -43,6 +43,8 @@
#ifndef _AR_H_
#define _AR_H_
+#include <sys/cdefs.h>
+
/* Pre-4BSD archives had these magic numbers in them. */
#define OARMAG1 0177555
#define OARMAG2 0177545