display SDL

Makefile

@@ -1,6 +1,6 @@
 # Variable
 CC = gcc
-CFLAGS = -Wall -Wextra $(shell pkg-config --cflags --libs sdl2)
+CFLAGS = -Wall -Wextra $(shell pkg-config --cflags --libs sdl2 SDL2_image)
 OBJ = main.o function.o display.o read.o
 TARGET = sokoban
 
@@ -15,7 +15,7 @@ main.o : main.c function.h display.h read.h
 function.o : function.c function.h
 	$(CC) $(CFLAGS) -c function.c
 
-display.o: display.c display.h
+display.o: display.c display.h function.h
 	$(CC) $(CFLAGS) -c display.c
 
 read.o: read.c read.h function.h