re PR c++/55800 (Link failure with thread_local in unnamed namespace)

	PR c++/55800
	* decl2.c (get_tls_init_fn): Copy DECL_EXTERNAL from the variable.

From-SVN: r207360

gcc/cp/ChangeLog

+2014-01-31  Jason Merrill  <jason@redhat.com>
+
+	PR c++/55800
+	* decl2.c (get_tls_init_fn): Copy DECL_EXTERNAL from the variable.
+
 2014-01-31  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/59082

gcc/cp/decl2.c

@@ -2949,7 +2949,7 @@ get_tls_init_fn (tree var)
       TREE_PUBLIC (fn) = TREE_PUBLIC (var);
       DECL_ARTIFICIAL (fn) = true;
       DECL_COMDAT (fn) = DECL_COMDAT (var);
-      DECL_EXTERNAL (fn) = true;
+      DECL_EXTERNAL (fn) = DECL_EXTERNAL (var);
       if (DECL_ONE_ONLY (var))
 	make_decl_one_only (fn, cxx_comdat_group (fn));
       if (TREE_PUBLIC (var))

gcc/testsuite/g++.dg/tls/thread_local8.C

+// PR c++/55800
+// { dg-options "-std=c++11" }
+// { dg-require-alias "" }
+// { dg-final { scan-assembler "_ZTH12foo_instance" { target tls_native } } }
+
+struct foo
+{
+  foo();
+};
+
+thread_local foo foo_instance;