[PATCH][Revision2]: Don't XFAIL 21674.cc on darwin

[Jack Howarth]

The following patch implements a xfail on darwin for 21_strings/basic_string/element_access/wchar_t/21674.cc
and 21_strings/basic_string/element_access/char/21674.cc and corrects the xfail on linux for
22_locale/ctype/is/char/2.cc by using a combination of 'dg-do run' and 'dg-xfail-run-if' so
that the tests are always run but only not xfailed on the specified targets. Tested on
i686-apple-darwin9. Okay for gcc trunk?
                        Jack
2008-12-14  Jack Howarth  <howarth@bromo.med.uc.edu>

	* testsuite/21_strings/basic_string/element_access/wchar_t/21674.cc: Use dg-do run
	and dg-xfail-run-if to run on all targets but not xfail on darwin.
	* libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/21674.cc: Same.
	* libstdc++-v3/testsuite/22_locale/ctype/is/char/2.cc: Switch to use dg-fo run and
	dg-xfail-run-if to run on all targets but not xfail on linux. Move dg-require-namedlocale
	to top.

Index: libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/21674.cc
===================================================================
--- libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/21674.cc	(revision 142754)
+++ libstdc++-v3/testsuite/21_strings/basic_string/element_access/wchar_t/21674.cc	(working copy)
@@ -1,6 +1,7 @@
 // { dg-require-debug-mode "" }
 // { dg-options "-O0 -D_GLIBCXX_DEBUG" }
-// { dg-do run { xfail *-*-* } }
+// { dg-do run }
+// { dg-xfail-run-if "" { ! { *-*-darwin* } } { "*" }  { "" } }     
 
 // Copyright (C) 2005 Free Software Foundation, Inc.
 //
Index: libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/21674.cc
===================================================================
--- libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/21674.cc	(revision 142754)
+++ libstdc++-v3/testsuite/21_strings/basic_string/element_access/char/21674.cc	(working copy)
@@ -1,6 +1,7 @@
 // { dg-require-debug-mode "" }
 // { dg-options "-O0 -D_GLIBCXX_DEBUG" }
-// { dg-do run { xfail *-*-* } }
+// { dg-do run }
+// { dg-xfail-run-if "" { ! { *-*-darwin* } } { "*" }  { "" } }     
 
 // Copyright (C) 2005 Free Software Foundation, Inc.
 //
Index: libstdc++-v3/testsuite/22_locale/ctype/is/char/2.cc
===================================================================
--- libstdc++-v3/testsuite/22_locale/ctype/is/char/2.cc	(revision 142754)
+++ libstdc++-v3/testsuite/22_locale/ctype/is/char/2.cc	(working copy)
@@ -1,5 +1,6 @@
-// { dg-do run { xfail *-*-![linux]* } }
 // { dg-require-namedlocale "" }
+// { dg-do run }
+// { dg-xfail-run-if "" { ! { *-*-linux* } } { "*" }  { "" } }     
 
 // Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
 // Free Software Foundation, Inc.