Index: decl2.c
===================================================================
--- decl2.c     (revision 194052)
+++ decl2.c     (working copy)
@@ -3944,8 +3944,13 @@ cp_write_global_declarations (void)
       || !vec_safe_is_empty (decl_namespace_list))
     return;

+  /* This is the point to write out a PCH if we're doing that.
+     In that case we do not want to do anything else.  */
   if (pch_file)
-    c_common_write_pch ();
+    {
+      c_common_write_pch ();
+      return;
+    }

   cgraph_process_same_body_aliases ();