$NetBSD: patch-vhdlpp_Makefile.in,v 1.1 2020/03/26 02:37:14 joerg Exp $

--- vhdlpp/Makefile.in.orig	2020-03-25 22:02:30.283023254 +0000
+++ vhdlpp/Makefile.in
@@ -117,9 +117,9 @@ lexor.cc: $(srcdir)/lexor.lex
 
 # Build this in two steps to avoid parallel build issues (see pr3462585)
 parse.cc: $(srcdir)/parse.y
-	$(YACC) --verbose -t -d -o $@ $<
-parse.h: parse.cc
-	mv parse.cc.h $@ 2>/dev/null || mv parse.hh $@
+	$(YACC) --verbose -t -d -o parse-tmp1.cc $< && mv parse-tmp1.cc $@
+parse.h: $(srcdir)/parse.y
+	$(YACC) --verbose -t -d -o parse-tmp2.cc $< && mv parse-tmp2.hh $@
 
 lexor_keyword.o: lexor_keyword.cc parse.h