base c lib without external lib

Makefile

@@ -4,15 +4,37 @@ AR			= ar
 
 ARFLAGS		= rc
 
-CFLAGS		= -Wall -Wextra -Werror -I libft.h
+HEADER		= libft.h
+
+CFLAGS		= -Wall -Wextra -Werror
 
 NAME		= libft.a
 
-SRC			= ft_isalpha.c ft_isdigit.c ft_isalnum.c ft_isascii.c
+SRC			= ft_isalpha.c \
+			  ft_isdigit.c \
+			  ft_isalnum.c \
+			  ft_isascii.c \
+			  ft_isprint.c \
+			  ft_strlen.c \
+			  ft_memset.c \
+			  ft_bzero.c \
+			  ft_memcpy.c \
+			  ft_memmove.c \
+			  ft_strlcpy.c \
+			  ft_strlcat.c \
+			  ft_toupper.c \
+			  ft_tolower.c \
+			  ft_strchr.c \
+			  ft_strrchr.c \
+			  ft_strncmp.c \
+			  ft_memcpy.c \
+			  ft_memchr.c \
+			  ft_strnstr.c \
+			  ft_atoi.c
 
-OBJDIR		= objs
+OBJ_DIR		= objs
 
-OBJ			= $(patsubst %, $(OBJDIR)/%o, $(SRC:.c=.))
+OBJ			= $(patsubst %, $(OBJ_DIR)/%o, $(SRC:.c=.))
 
 
 all: 		$(NAME)
@@ -21,10 +43,10 @@ $(NAME):	$(OBJ)
 			$(AR) $(ARFLAGS) $(NAME) $(OBJ)
 			ranlib $(NAME)
 
-$(OBJDIR)/%.o:		%.c | $(OBJDIR)
-			$(CC) -o $@ -c $< $(CFLAGS)
+$(OBJ_DIR)/%.o:		%.c | $(OBJ_DIR)
+			$(CC) -o $@ -c $< $(CFLAGS) -I$(HEADER)
 
-$(OBJDIR):
+$(OBJ_DIR):
 			mkdir $@
 
 clean:
@@ -35,4 +57,4 @@ fclean:		clean
 
 re:			fclean all
 
-.PHONY:		all clean fclean re 
+.PHONY:		all clean fclean re