--- gcc-master.orig/gcc/d/d-spec.cc	2020-06-05 23:56:44.932699880 +0100
+++ gcc-master/gcc/d/d-spec.cc	2020-06-12 10:01:08.541475656 +0100
@@ -490,3 +490,10 @@
 
 int lang_specific_extra_outfiles = 0;  /* Not used for D.  */
 
+/* lang_register_spec_functions register the D associated spec
+   functions.  Not used for D.  */
+
+void
+lang_register_spec_functions (void)
+{
+}
