Add semantic passes

gcc/elna-spec.cc

@@ -0,0 +1,16 @@
+void
+lang_specific_driver (struct cl_decoded_option ** /* in_decoded_options */,
+		      unsigned int * /* in_decoded_options_count */,
+		      int * /*in_added_libraries */)
+{
+}
+
+/* Called before linking.  Returns 0 on success and -1 on failure.  */
+int
+lang_specific_pre_link (void)
+{
+  return 0;
+}
+
+/* Number of extra output files that lang_specific_pre_link may generate.  */
+int lang_specific_extra_outfiles = 0;