add decl

src/lib/libc/stdlib/abort.c

@@ -32,13 +32,15 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char *rcsid = "$OpenBSD: abort.c,v 1.3 1996/10/25 03:09:15 tholo Exp $";
+static char *rcsid = "$OpenBSD: abort.c,v 1.4 1996/10/25 07:06:37 downsj Exp $";
 #endif /* LIBC_SCCS and not lint */
 
 #include <signal.h>
 #include <stdlib.h>
 #include <unistd.h>
 
+void (*__cleanup)();
+
 void
 abort()
 {