re PR objc/27438 ([unit-at-a-time] '_OBJC_INSTANCE_0' defined but not used warning)

2007-01-23  Andrew Pinski  <pinskia@gmail.com>

        PR objc/27438
        * objc-act.c (objc_add_static_instance): Mark the decl as
        TREE_USED.

2007-01-23  Andrew Pinski  <pinskia@gmail.com>

        PR objc/27438
        * objc.dg/const-str-12.m: New test.

From-SVN: r121102

gcc/objc/ChangeLog

+2007-01-23  Andrew Pinski  <pinskia@gmail.com>
+
+	PR objc/27438
+	* objc-act.c (objc_add_static_instance): Mark the decl as
+	TREE_USED.
+
 2007-01-20  Andrew Pinski  <pinskia@gmail.com>
 
 	PR objc/30479

gcc/objc/objc-act.c

@@ -2007,6 +2007,7 @@ objc_add_static_instance (tree constructor, tree class_decl)
   DECL_COMMON (decl) = 1;
   TREE_STATIC (decl) = 1;
   DECL_ARTIFICIAL (decl) = 1;
+  TREE_USED (decl) = 1;
   DECL_INITIAL (decl) = constructor;
 
   /* We may be writing something else just now.

gcc/testsuite/ChangeLog

+2007-01-23  Andrew Pinski  <pinskia@gmail.com>
+
+	PR objc/27438
+	* objc.dg/const-str-12.m: New test.
+
 2007-01-23  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/30532

gcc/testsuite/objc.dg/const-str-12.m

+/* { dg-options "-Wall -funit-at-a-time -fgnu-runtime" } */
+/* { dg-do compile }  */
+/* PR objc/27438, make sure that the decl produced by the front-end
+   does not cause a warning to be produced. */
+
+@interface NXConstantString
+{
+  void *isa;
+  const char * const nxcsptr;
+  const unsigned int nxcslen;
+}
+@end
+NXConstantString *a =   @"NSInconsistentArchiveException"; /* { dg-bogus "defined but not used" } */
+
+