isa-field-1.m: Only run on darwin.

        * objc.dg/isa-field-1.m: Only run on darwin.
        * objc.dg/lookup-1.m: Likewise.
        * objc.dg/try-catch-8.m: Likewise.

From-SVN: r100242

gcc/testsuite/ChangeLog

+2005-05-26  Mike Stump  <mrs@apple.com>
+
+	* objc.dg/isa-field-1.m: Only run on darwin.
+	* objc.dg/lookup-1.m: Likewise.
+	* objc.dg/try-catch-8.m: Likewise.
+
 2005-05-26  Roger Sayle  <roger@eyesopen.com>
 
 	PR tree-optimization/9814

gcc/testsuite/objc.dg/isa-field-1.m

 /* Ensure there are no bizarre difficulties with accessing the 'isa' field of objects.  */
-/* { dg-do compile } */
+/* { dg-do compile { target *-*-darwin* } } */
 
 #include <objc/Object.h>
 

gcc/testsuite/objc.dg/lookup-1.m

-/* { dg-do run } */
+/* { dg-do run { target *-*-darwin* } } */
 
 #include <objc/Object.h>
 #include <stdlib.h>

gcc/testsuite/objc.dg/try-catch-8.m

@@ -3,7 +3,7 @@
 /* Developed by Ziemowit Laski <zlaski@apple.com>.  */
 
 /* { dg-options "-fobjc-exceptions -O2" } */
-/* { dg-do run } */
+/* { dg-do run { target *-*-darwin* } } */
 
 #include <objc/Object.h>
 #include <stdlib.h>