Added HAVE_STDARG_PROTOTYPES and signed
diff --git a/acconfig.h b/acconfig.h
index b3ff6c6..5d7fbe1 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -19,6 +19,13 @@
/* Define if your compiler supports function prototypes */
#undef HAVE_PROTOTYPES
+/* Define if your compiler supports variable length function prototypes
+ (e.g. void fprintf(FILE *, char *, ...);) *and* <stdarg.h> */
+#undef HAVE_STDARG_PROTOTYPES
+
+/* Define to empty if the keyword does not work. */
+#undef signed
+
/* Define for SOLARIS 2.x */
#undef SOLARIS