refactor code to multiple modules

Makefile

@@ -5,6 +5,14 @@ LIBS=\
 	 $(shell pkg-config --cflags --libs wayland-server) \
 	 $(shell pkg-config --cflags --libs xkbcommon)
 
+OBJS=\
+	diyac.c \
+	cursor.c \
+	output.c \
+	seat.c \
+	xdg.c \
+	xdg-shell-protocol.c
+
 # wayland-scanner is a tool which generates C headers and rigging for Wayland
 # protocols, which are specified in XML. wlroots requires you to rig these up
 # to your build system yourself and provide them in the include path.
@@ -16,11 +24,16 @@ xdg-shell-protocol.c: xdg-shell-protocol.h
 	$(WAYLAND_SCANNER) private-code \
 		$(WAYLAND_PROTOCOLS)/stable/xdg-shell/xdg-shell.xml $@
 
-diyac: diyac.c xdg-shell-protocol.h xdg-shell-protocol.c
+wlr-layer-shell-unstable-v1-protocol.h:
+	$(WAYLAND_SCANNER) server-header \
+		protocol/wlr-layer-shell-unstable-v1.xml $@
+
+diyac: $(OBJS)
+	echo "Object is $(OBJS)"
 	$(CC) $(CFLAGS) \
 		-g -Werror -I. \
 		-DWLR_USE_UNSTABLE \
-		-o $@ $< \
+		-o $@ $(OBJS) \
 		$(LIBS)
 
 clean: