build: overhaul Makefile

.gitignore

@@ -1,4 +1,5 @@
 cub3d
 *.o
+*.d
 libft.a
 vgcore.*

Makefile

@@ -1,6 +1,13 @@
 CC = cc
+# -fno-omit-frame-pointer is to prevent malloc stacktraces from being truncated,
+# see "My malloc stacktraces are too short" here:
+# https://github.com/google/sanitizers/wiki/AddressSanitizer
 SANITIZERS = -fsanitize=address,undefined -fno-omit-frame-pointer
-CFLAGS=-Wall -Wextra -Werror -g $(SANITIZERS) -I mlx
+ifeq ($(CFLAGS),)
+	CFLAGS = -Wall -Wextra -Werror -g
+endif
+IFLAGS = -I./mlx -I./libft
+
 SOURCEFILES = \
 		src/draw/draw_map.c \
 		src/draw/drawutils.c \
@@ -13,31 +20,40 @@ SOURCEFILES=\
 		src/utils/hooks.c \
 	    src/map/map_checker.c \
 
-OBJECTS=$(patsubst src/%.c,objects/%.o,$(SOURCEFILES))
-OBJDIR=objects
+OBJECTS = $(SOURCEFILES:.c=.o)
 NAME = cub3d
+DEPS = $(OBJECTS:.o=.d)
+
+.PHONY: all clean fclean bonus re sane
 
 all: $(OBJECTS) $(NAME)
 
+-include $(DEPS)
+
 $(NAME): $(OBJECTS)
 	if [[ "$$(echo $$LD_LIBRARY_PATH | grep -c minilibx)" == "0" ]]; then $(MAKE) -C mlx/; fi
-	$(MAKE) -C libft/
-	cp libft/libft.a .
-	$(CC) $(CFLAGS) $(OBJECTS) -o $(NAME) -L. -lft -Lmlx -lmlx -lz -lXext -lX11
+	+$(MAKE) -C libft/
+	$(CC) $(CFLAGS) $(IFLAGS) $(OBJECTS) -o $(NAME) -Llibft -Lmlx -lft -lmlx -lz -lXext -lX11
 
-$(OBJDIR)/%.o: src/%.c
-	$(CC) $(CFLAGS) -Imlx -c $< -o $@
+%.o: %.c
+	$(CC) -c $(CFLAGS) $(IFLAGS) -o $*.o $*.c
+	$(CC) -MM $(CFLAGS) $(IFLAGS) -MT $*.o $*.c > $*.d
 
 clean:
-	rm -f $(OBJECTS) 
+	+make -C libft clean
+	find . -name '*.o' -print -delete
+	find . -name '*.d' -print -delete
 
 fclean: clean
+	+make -C libft fclean
 	rm -f $(NAME)
 
 bonus: CFLAGS += -D BONUS=1
-
 bonus: all
 
-re: fclean all
+sane: CFLAGS += $(SANITIZERS)
+sane: all
 
-.PHONY: all clean fclean bonus re
+re:
+	+make fclean
+	+make all