From 89554b59f7fc491f39b0292112fdd38222b86319 Mon Sep 17 00:00:00 2001
From: Thomas Bernard <miniupnp@free.fr>
Date: Sat, 1 Feb 2020 14:42:15 +0100
Subject: [PATCH] Fix build of prepackaged sources

if 3rdparty directory is not there, do not attempt to copy from it
---
 src/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index d1f8c940..5b74d51b 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -1169,8 +1169,8 @@ endif
 6502.h:	6502.c
 
 6502.c:	../3rdparty/6502/sources/6502.c
-	$(CP) $< $@
-	$(CP) ../3rdparty/6502/API/emulation/CPU/6502.h 6502.h
+	if [ -f $< ] ; then $(CP) $< $@ ; fi
+	if [ -f ../3rdparty/6502/API/emulation/CPU/6502.h ] ; then $(CP) ../3rdparty/6502/API/emulation/CPU/6502.h 6502.h ; fi
 
 ../3rdparty/6502/sources/6502.c:
 	if [ -d ../3rdparty ] ; then $(MAKE) -C ../3rdparty 6502 ; fi