c-common.c (check_format_info): Avoid non-literal format string warnings when…

c-common.c (check_format_info): Avoid non-literal format string warnings when `first_arg_num' is zero.

       * c-common.c (check_format_info): Avoid non-literal format string
       warnings when `first_arg_num' is zero.

From-SVN: r30240

gcc/ChangeLog

+Thu Oct 28 06:47:32 1999  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* c-common.c (check_format_info): Avoid non-literal format string
+	warnings when `first_arg_num' is zero.
+
 Thu Oct 28 12:28:48 1999  Bernd Schmidt  <bernds@cygnus.co.uk>
 
 	* rtl.texi: Delete explicit Prev, Up and Next entries in "@node"s.

gcc/c-common.c

@@ -1491,7 +1491,11 @@ check_format_info (info, params)
     {
       /* The user may get multiple warnings if the supplied argument
 	 isn't even a string pointer.  */
-      warning ("format not a string literal, argument types not checked");
+      /* Functions taking a va_list normally pass a non-literal format
+	 string.  These functions typically are declared with
+	 first_arg_num == 0, so avoid warning in those cases.  */
+      if (info->first_arg_num != 0)
+	warning ("format not a string literal, argument types not checked");
       return;
     }
   format_tree = TREE_OPERAND (format_tree, 0);
@@ -1499,7 +1503,11 @@ check_format_info (info, params)
     {
       /* The user may get multiple warnings if the supplied argument
 	 isn't even a string pointer.  */
-      warning ("format not a string literal, argument types not checked");
+      /* Functions taking a va_list normally pass a non-literal format
+	 string.  These functions typically are declared with
+	 first_arg_num == 0, so avoid warning in those cases.  */
+      if (info->first_arg_num != 0)
+	warning ("format not a string literal, argument types not checked");
       return;
     }
   format_chars = TREE_STRING_POINTER (format_tree);