$NetBSD: patch-Makefile,v 1.1 2019/12/28 19:32:18 thorpej Exp $

Allow the default location of the X16 ROM to be overridden.

--- Makefile.orig	2019-12-28 18:52:41.000000000 +0000
+++ Makefile
@@ -48,6 +48,9 @@ ifneq ("$(wildcard ./rom_labels.h)","")
 HEADERS+=rom_labels.h
 endif
 
+ifdef ROM_RELATIVE_PATH
+	CFLAGS+=-DROM_RELATIVE_PATH=\"$(ROM_RELATIVE_PATH)\"
+endif
 
 all: $(OBJS) $(HEADERS)
 	$(CC) -o $(OUTPUT) $(OBJS) $(LDFLAGS)
