vene files and dwm changes

Makefile

@@ -16,8 +16,9 @@ ${OBJ}: config.h config.mk
 config.h:
 	cp config.def.h $@
 
-dwm: ${OBJ}
-	${CC} -o $@ ${OBJ} ${LDFLAGS}
+dwm: ${OBJ} vene.cpp
+	c++ -c ${CPPFLAGS} -std=c++17 vene.cpp
+	${CC} -o $@ ${OBJ} vene.o ${LDFLAGS} -lstdc++
 
 clean:
 	rm -f dwm ${OBJ} dwm-${VERSION}.tar.gz