使用gcc -MM标志在单个文件中生成所有项目依赖关系 [英] Generate all project dependencies in a single file using gcc -MM flag

问题描述

我想生成一个依赖关系文件，它由源文件的所有依赖关系通过Makefile使用gcc -M标志。我为此解决方案搜索，但是所提到的所有解决方案都是为多个对象生成多个deps文件。

I want to generate a single dependency file which consists of all the dependencies of source files using gcc -M flags through Makefile. I googled for this solution but, all the solutions mentioned are for generating multiple deps files for multiple objects.

DEPS = make.dep

$(OBJS): $(SOURCES)
    @$(CC) -MM $(SOURCEs) > $(DEPS)
    @mv -f $(DEPS) $(DEPS).tmp
    @sed -e 's|.$@:|$@:|' < $(DEPS).tmp > $(DEPS)
    @sed -e 's/.*://' -e 's/\\$$//' < $(DEPS).tmp | fmt -1 | \
      sed -e 's/^ *//' -e 's/$$/:/' >> $(DEPS)
    @rm -f $(DEPS).tmp

但它是不能正常工作请告诉我我犯错误的地方。

But it is not working properly. Please tell me where i'm making the mistake.

推荐答案

这些方面的东西是我用来取得我所有依赖的东西一个文件：

Something along these lines is what I use to get all my dependencies in a single file:

program_H_SRCS := $(wildcard *.h)
program_C_SRCS := $(wildcard *.c)
DEPS = make.deps

make.deps: $(program_C_SRCS) $(program_H_SRCS)
    $(CC) $(CPPFLAGS) -MM $(program_C_SRCS) > make.deps

include $(DEPS)

这基本上导致所有在项目中的任何C或H文件被修改时，用户（而不是系统）依赖关系被重建成单个文件。

This basically causes all the user ( as opposed to system ) dependencies to be rebuilt into a single file whenever any C or H file in the project is modified.

+++++ ++++ EDIT +++++++++++

我发现了一个更好的做事方式。我为每个源文件生成一个单独的dep文件。这是基本的makefile：

I've since found a better way of doing things. I generate a separate dep file for each source file. Here is the basic makefile:

program_NAME := myprogram
program_SRCS := $(wildcard *.c)
program_OBJS := ${program_SRCS:.c=.o}
clean_list += $(program_OBJS) $(program_NAME)

# C Preprocessor Flags
CPPFLAGS += 
# compiler flags
CFLAGS += -ansi -Wall -Wextra -pedantic-errors

.PHONY: all clean distclean

all: $(program_NAME)

clean:
    @- $(RM) $(clean_list)

distclean: clean

# Generate dependencies for all files in project
%.d: $(program_SRCS)
    @ $(CC) $(CPPFLAGS) -MM $*.c | sed -e 's@^\(.*\)\.o:@\1.d \1.o:@' > $@

clean_list += ${program_SRCS:.c=.d}

$(program_NAME): $(program_OBJS)
    indent -linux -brf $(program_SRCS)
    splint $(program_SRCS)
    $(LINK.c) $(program_OBJS) -o $(program_NAME)

ifneq "$(MAKECMDGOALS)" "clean"
# Include the list of dependancies generated for each object file
-include ${program_SRCS:.c=.d}
endif

这有两件事：

1. 如果有任何foo的文件。 c依赖于更改，然后重建foo.o，而无需重新构建项目中的其他文件。


2. dep文件本身具有与对象文件相同的依赖关系，因此如果任何deps被修改，dep文件本身也被重新生成，在对象文件deps被检查之前。

这篇关于使用gcc -MM标志在单个文件中生成所有项目依赖关系的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！