Makefile重新链接错误 [英] Makefile relink error

问题描述

我正在尝试使此Makefile重新链接，而不是重新编译未经修改的文件. "libft"是我的库，没有任何错误.我在执行

I am trying to get this makefile relink and not recompile unessecarily files that aren't modified. The "libft" is my library and doesnt have any errors. The error that I am having when doing

make

是:

make: *** No rule to make target `main.o', needed by `ft_printf'.  Stop.

我的makefile是:

My makefile is:

NAME = ft_printf

SRC = main.c\
  ft_printf.c\
  parser_main.c\
  utils.c\
  debug_funcs.c

OBJ = $(SRC:.c=.o)

SRC_PATH = srcs/

SRC_POS = $(addprefix $(SRC_PATH),$(SRC))

INC = -I includes

LIBFT = libft/libft.a

CC = gcc

FLAGS = -Wall -Wextra -Werror

all: $(NAME)

$(NAME): $(OBJ)
    $(CC) $(FLAGS) $(OBJ) -o $(NAME) $(LIBFT)

%.o: %.c
    $(CC) -o $@ -c $< $(FLAGS)
$(LIBFT):
    make -C ./libft/

clean:
    rm -f $(OBJ)
    make clean -C ./libft/

fclean: clean
    rm -f $(NAME)
    make fclean -C ./libft/

re: fclean all

有什么主意吗?我想不通，我认为这是因为未调用％.o:％.c

Any idea ? I can't figure it out and i think it's because %.o:%.c isn't called

推荐答案

鉴于这些变量的存在:

SRC_PATH = srcs/    
SRC_POS = $(addprefix $(SRC_PATH),$(SRC))

我猜测您的源文件实际上位于srcs/中，而您正在.中构建目标文件，因此，此模式规则:

I'm guessing that your source files actually live in srcs/ whereas you're building your object files in . So this pattern rule:

%.o: %.c

尝试匹配main.o时

找不到main.c，因为该文件确实是srcs/main.c.由于该模式不匹配，因此不考虑该规则本身，并且由于未找到其他规则，因此会出现错误.

when trying to match main.o won't find a main.c since that file really is srcs/main.c. Since that pattern doesn't match, the rule itself isn't considered, and since no other rule is found, you get an error.

相反，请尝试:

%.o : $(SRC_PATH)/%.c
    $(CC) -o $@ -c $< $(FLAGS)

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