Makefile pour install_dir et sdl2.o

makefile

 CFLAGS += -Wall -Wextra -std=c99
-LDFLAGS += -lm
+LDFLAGS += -lm -lSDL2
 
-main: main.o grid.o player.o
-	gcc main.o grid.o player.o $(LDFLAGS) -o main
+main: main.o grid.o player.o sdl2.o
+	gcc main.o grid.o player.o sdl2.o $(LDFLAGS) -o $@
 
 main.o: main.c grid.h player.h
-	gcc main.c $(CFLAGS) -c -o main.o 
+	gcc main.c $(CFLAGS) -c -g -o $@
 
 grid.o: grid.c grid.h player.h
-	gcc grid.c $(CFLAGS) -c -o grid.o
+	gcc grid.c $(CFLAGS) -c -g -o $@
 
 player.o: player.c grid.h player.h
-	gcc player.c $(CFLAGS) -c -o player.o
+	gcc player.c $(CFLAGS) -c -g -o $@
+
+sdl2.o: sdl2.c sdl2.h
+	gcc sdl2.c $(CFLAGS) -c -g -o $@
 
 clean:
 	rm -r *.o main html *.gz
@@ -19,5 +22,9 @@ clean:
 doc:
 	doxygen
 
+SDL:
+	cd SDL2 && ./configure --prefix=$PWD/../install_dir
+	cd SDL2 && make install -j16
+
 archive:
 	tar -cf sokoban.tar.gz Doxyfile grid.c grid.h level1.txt main.c makefile player.c player.h README.md
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