--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lib/ac/wait.h	Wed Jan 16 22:39:43 2008 +0100
@@ -0,0 +1,10 @@
+#include <sys/types.h>
+#if HAVE_SYS_WAIT_H
+# include <sys/wait.h>
+#endif
+#ifndef WEXITSTATUS
+# define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
+#endif
+#ifndef WIFEXITED
+# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
+#endif