re PR c++/34094 (Undefined static data member in anonymous namespace can acquire…

re PR c++/34094 (Undefined static data member in anonymous namespace can acquire a definition anyway)

        PR c++/34094
        * decl2.c (cp_write_global_declarations): Don't write out static
        data members with DECL_IN_AGGR_P set.

From-SVN: r132218

gcc/cp/ChangeLog

+2008-02-10  Jason Merrill  <jason@redhat.com>
+
+	PR c++/34094
+	* decl2.c (cp_write_global_declarations): Don't write out static 
+	data members with DECL_IN_AGGR_P set.
+
 2008-02-08  Jason Merrill  <jason@redhat.com>
 
 	PR c++/35116

gcc/cp/decl2.c

@@ -3396,7 +3396,9 @@ cp_write_global_declarations (void)
       /* Static data members are just like namespace-scope globals.  */
       for (i = 0; VEC_iterate (tree, pending_statics, i, decl); ++i)
 	{
-	  if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl))
+	  if (var_finalized_p (decl) || DECL_REALLY_EXTERN (decl)
+	      /* Don't write it out if we haven't seen a definition.  */
+	      || DECL_IN_AGGR_P (decl))
 	    continue;
 	  import_export_decl (decl);
 	  /* If this static data member is needed, provide it to the

gcc/testsuite/g++.dg/other/anon5.C

+// PR c++/34094
+// { dg-do link }
+// { dg-options "-g" }
+
+namespace {
+  struct c
+  {
+    static const bool t = 0;
+  };
+}
+
+const bool &f()
+{
+  return c::t;			// { dg-error "undefined" }
+}
+
+int main(void)
+{
+  return 0;
+}
+