--- gcc-versionno-orig/gcc/d/d-spec.cc	2019-04-23 21:08:46.000000000 +0100
+++ gcc-versionno/gcc/d/d-spec.cc	2019-07-09 01:24:45.703235686 +0100
@@ -514,3 +514,8 @@
 
 int lang_specific_extra_outfiles = 0;  /* Not used for D.  */
 
+/* lang_register_spec_functions.  Not used for D.  */
+void
+lang_register_spec_functions (void)
+{
+}
