--- gcc-git/gcc/d/d-spec.cc	2021-06-10 11:58:18.298985852 +0100
+++ gm2-floppsie/gcc/d/d-spec.cc	2021-06-17 10:20:53.219400521 +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)
+{
+}
