c-decl.c (declspecs_add_type): Don't pedwarn for _Complex in system headers.

	* c-decl.c (declspecs_add_type): Don't pedwarn for _Complex in
	system headers.

testsuite:
	* gcc.dg/complex-2.c, gcc.dg/complex-2.h: New test.

From-SVN: r88571

gcc/ChangeLog

 2004-10-05  Joseph S. Myers  <jsm@polyomino.org.uk>
 
+	* c-decl.c (declspecs_add_type): Don't pedwarn for _Complex in
+	system headers.
+
+2004-10-05  Joseph S. Myers  <jsm@polyomino.org.uk>
+
 	* c-decl.c (pushdecl): When an extern declaration at block scope
 	refers to a visible entity with internal linkage, use the old DECL
 	rather than the new one.

gcc/c-decl.c

@@ -6816,7 +6816,7 @@ declspecs_add_type (struct c_declspecs *specs, tree type)
 	      break;
 	    case RID_COMPLEX:
 	      dupe = specs->complex_p;
-	      if (pedantic && !flag_isoc99)
+	      if (pedantic && !flag_isoc99 && !in_system_header)
 		pedwarn ("ISO C90 does not support complex types");
 	      if (specs->typespec_word == cts_void)
 		error ("both %<complex%> and %<void%> in "

gcc/testsuite/ChangeLog

 2004-10-05  Joseph S. Myers  <jsm@polyomino.org.uk>
 
+	* gcc.dg/complex-2.c, gcc.dg/complex-2.h: New test.
+
+2004-10-05  Joseph S. Myers  <jsm@polyomino.org.uk>
+
 	* gcc.c-torture/compile/20041005-1.c: New test.
 
 2004-10-05  Nathan Sidwell  <nathan@codesourcery.com>

gcc/testsuite/gcc.dg/complex-2.c

+/* Allow complex types in system headers even with -std=iso9899:1990
+   -pedantic-errors.  */
+/* Origin: Joseph Myers <jsm@polyomino.org.uk> */
+/* { dg-do compile } */
+/* { dg-options "-std=iso9899:1990 -pedantic-errors" } */
+
+#include "complex-2.h"

gcc/testsuite/gcc.dg/complex-2.h

+/* Allow complex types in system headers even with -std=iso9899:1990
+   -pedantic-errors.  Header file.  */
+
+#pragma GCC system_header
+
+_Complex double x;