test for presence of stddef.h
separate arg requirements for getpgrp() and setpgrp()
diff --git a/acconfig.h b/acconfig.h
index a68c11c..eee1b84 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -12,10 +12,12 @@
/* Define to `long' if <time.h> doesn't define. */
#undef clock_t
-/* Define if getpgrp() must be called as getpgrp(0)
- and (consequently) setpgrp() as setpgrp(0, 0). */
+/* Define if getpgrp() must be called as getpgrp(0). */
#undef GETPGRP_HAVE_ARG
+/* Define if setpgrp() must be called as setpgrp(0, 0). */
+#undef SETPGRP_HAVE_ARG
+
/* Define this if your time.h defines altzone */
#undef HAVE_ALTZONE