c-common.c (check_format_info): Warn for a wide character string used as a…

c-common.c (check_format_info): Warn for a wide character string used as a non-wide format argument.

	* c-common.c (check_format_info): Warn for a wide character string
	used as a non-wide format argument.

testsuite:
	* gcc.dg/c90-printf-1.c: Add test for wide string format.

From-SVN: r36586

gcc/ChangeLog

 2000-09-24  Joseph S. Myers  <jsm28@cam.ac.uk>
 
+	* c-common.c (check_format_info): Warn for a wide character string
+	used as a non-wide format argument.
+
+2000-09-24  Joseph S. Myers  <jsm28@cam.ac.uk>
+
 	* builtins.def (BUILT_IN_LLABS): Add.
 	* builtins.c (expand_builtin): Also abort on BUILT_IN_LLABS.
 	* c-common.c (c_common_nodes_builtins): Create builtin functions

gcc/c-common.c

@@ -2040,6 +2040,11 @@ check_format_info (status, info, params)
 	status_warning (status, "format not a string literal, argument types not checked");
       return;
     }
+  if (TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (format_tree))) != char_type_node)
+    {
+      status_warning (status, "format is a wide character string");
+      return;
+    }
   format_chars = TREE_STRING_POINTER (format_tree);
   format_length = TREE_STRING_LENGTH (format_tree);
   if (format_length <= 1)

gcc/testsuite/ChangeLog

+2000-09-24  Joseph S. Myers  <jsm28@cam.ac.uk>
+
+	* gcc.dg/c90-printf-1.c: Add test for wide string format.
+
 2000-09-22  Geoff Keating  <geoffk@cygnus.com>
 
 	* gcc.c-torture/compile/20000922-1.c: New file.

gcc/testsuite/gcc.dg/c90-printf-1.c

@@ -243,5 +243,6 @@ foo (int i, int i1, int i2, unsigned int u, double d, char *s, void *p,
   printf ("%"); /* { dg-warning "trailing" "trailing % warning" } */
   printf ("%++d", i); /* { dg-warning "repeated" "repeated flag warning" } */
   printf ("%n", cn); /* { dg-warning "constant" "%n with const" } */
+  printf ((const char *)L"foo"); /* { dg-warning "wide" "wide string" } */
   /* Can we test for the warning for unterminated string formats?  */
 }