我注意到有很多人有消息「make:沒有爲'all'完成」的問題,但是我的問題恰恰相反。 這是我的生成文件:連續兩次「make all」不返回「make:'all'沒有任何事情要做。」
#################
## VARIABLES ##
#################
# Environment
OS := $(shell uname)
# Output
NAME := libft.a
DYNAMIC_NAME := ${NAME:a=so}
# Compiler
CC := gcc
ifneq ($(OS), Linux)
FLAGS += -Wall -Wextra -Werror
endif
DYN_FLAG := -shared
HEADERS := -I ./includes/
O_FLAG := -O2
# Directories
ADDITIONAL_FUNCTIONS = $(addprefix ./additional_functions/, $(ADDITIONAL))
BONUS_FUNCTIONS = $(addprefix ./bonus_functions/, $(BONUS))
LIBC_FUNCTIONS = $(addprefix ./libc_functions/, $(LIBC))
PERSONAL_FUNCTIONS = $(addprefix ./personal_functions/, $(PERSONAL))
DYN_OBJDIR = dyn_build/
OBJDIR := build/
# Sources
ADDITIONAL += ft_itoa.c
ADDITIONAL += ft_memalloc.c ft_memdel.c
ADDITIONAL += ft_putchar.c ft_putchar_fd.c
ADDITIONAL += ft_putendl.c ft_putendl_fd.c
ADDITIONAL += ft_putnbr.c ft_putnbr_fd.c
ADDITIONAL += ft_putstr.c ft_putstr_fd.c
ADDITIONAL += ft_strclr.c ft_strdel.c
ADDITIONAL += ft_strnew.c ft_strjoin.c
ADDITIONAL += ft_strequ.c ft_strnequ.c
ADDITIONAL += ft_striter.c ft_striteri.c
ADDITIONAL += ft_strmap.c ft_strmapi.c
ADDITIONAL += ft_strsplit.c ft_strsub.c ft_strtrim.c
BONUS += ft_lstadd.c ft_lstnew.c
BONUS += ft_lstdel.c ft_lstdelone.c
BONUS += ft_lstiter.c ft_lstmap.c
LIBC += ft_atoi.c
LIBC += ft_isalnum.c ft_isalpha.c ft_isascii.c
LIBC += ft_isdigit.c ft_isprint.c
LIBC += ft_memcpy.c ft_memccpy.c ft_memchr.c ft_memcmp.c
LIBC += ft_bzero.c ft_memmove.c ft_memset.c
LIBC += ft_strcat.c ft_strlcat.c ft_strncat.c
LIBC += ft_strchr.c ft_strrchr.c
LIBC += ft_strcmp.c ft_strncmp.c
LIBC += ft_strcpy.c ft_strncpy.c ft_strdup.c
LIBC += ft_strlen.c
LIBC += ft_strstr.c ft_strnstr.c
LIBC += ft_tolower.c ft_toupper.c
PERSONAL += ft_intlen.c
PERSONAL += ft_invert.c ft_islower.c ft_isupper.c
PERSONAL += ft_lstgetnode.c ft_lstsize.c
PERSONAL += ft_kill.c ft_putuchar.c ft_putuchar_fd.c
PERSONAL += ft_strrev.c ft_strrevcpy.c
PERSONAL += get_next_line.c
DYN_OBJECTS = $(patsubst %.c,$(DYN_OBJDIR)%.o,$(SRCS))
OBJECTS = $(patsubst %.c,$(OBJDIR)%.o,$(SRCS))
SRCS += $(ADDITIONAL_FUNCTIONS)
SRCS += $(BONUS_FUNCTIONS)
SRCS += $(LIBC_FUNCTIONS)
SRCS += $(PERSONAL_FUNCTIONS)
#################
## RULES ##
#################
all: $(NAME)
$(NAME): $(OBJECTS)
@ar rcs [email protected] $(patsubst %.c,$(OBJDIR)%.o,$(notdir $(SRCS)))
ranlib [email protected]
@echo "Static library created."
$(OBJECTS): | $(OBJDIR)
$(OBJDIR):
@mkdir -p [email protected]
$(OBJDIR)%.o: %.c
$(CC) $(FLAGS) $(O_FLAG) -c $< $(HEADERS) -o $(OBJDIR)$(notdir [email protected])
$(DYN_OBJECTS): | $(DYN_OBJDIR)
$(DYN_OBJDIR):
@mkdir -p [email protected]
$(DYN_OBJDIR)%.o: %.c
$(CC) $(FLAGS) $(O_FLAG) -c $< $(HEADERS) -fpic -o $(DYN_OBJDIR)$(notdir [email protected])
clean:
@/bin/rm -rfv $(OBJDIR)
@/bin/rm -rfv $(DYN_OBJDIR)
fclean: clean
@/bin/rm -fv $(NAME)
@/bin/rm -fv $(DYNAMIC_NAME)
re: fclean all
so: $(DYN_OBJECTS)
@$(CC) $(DYN_FLAG) -o $(DYNAMIC_NAME) $(patsubst %.c,$(DYN_OBJDIR)%.o,$(notdir $(SRCS)))
@echo "Dynamic library created."
.PHONY: all build clean dynbuild fclean re so
makefile工作得很好。它將不同目錄中的每個.c文件創建一個對象目錄,編譯/如果該庫是靜態的,並且dyn_build /如果它是動態的,則將目標文件放入該目錄中並從它們編譯庫。
我的問題是,如果我連續兩次運行make,第二次不應該做任何事情,因爲對象文件和庫仍然存在並且是最新的。但是,不知怎的,連續兩次導致第二次重複操作。
這是什麼原因造成的,有沒有辦法解決這個問題?
試着去'make --trace'或使用['remake'](http://bashdb.sourceforge.net/remake /)用'-x'來了解更多發生了什麼 –
我看到了從現在開始的地方,謝謝! –
'$(OBJDIR)$(notdir $ @)'和'$(DYN_OBJDIR)$(notdir $ @)'打破第二條規則[here](http://make.mad-scientist.net/papers/rules- of-makefiles /),對象文件的配方不會創建您在規則中指定的文件。 – user657267