使用 make 文件创建目录 [英] Create directories using make file

问题描述

我想使用 makefile 创建目录.我的项目目录是这样的

I want to create directories using makefile. My project directory is like this

+--Project  
   +--output  
   +--source  
     +Testfile.cpp  
   +Makefile  

我想把所有的对象和输出放到各自的输出文件夹中.我想创建编译后的文件夹结构.

I want to put all the objects and output into the respective output folder. I want to create folder structure which would be like this after compiling.

+--Project
   +--output
     +--debug (or release)
       +--objs
         +Testfile.o
       +Testfile (my executable file)
   +--source
     +Testfile.cpp
   +Makefile

我尝试了多种选择，但都没有成功.请帮助我使用 make 文件创建目录.我正在发布我的 Makefile 供您考虑.

I tried with several options, but could not succeed. Please help me to make directories using make file. I'm posting my Makefile for your consideration.

#---------------------------------------------------------------------
# Input dirs, names, files
#---------------------------------------------------------------------
OUTPUT_ROOT := output/

TITLE_NAME := TestProj 

ifdef DEBUG 
    TITLE_NAME += _DEBUG
else
ifdef RELEASE
    TITLE_NAME += _RELEASE
endif
endif


# Include all the source files here with the directory tree
SOURCES := 
        source/TestFile.cpp 

#---------------------------------------------------------------------
# configs
#---------------------------------------------------------------------
ifdef DEBUG
OUT_DIR     := $(OUTPUT_ROOT)debug
CC_FLAGS    := -c -Wall
else
ifdef RELEASE
OUT_DIR     := $(OUTPUT_ROOT)release
CC_FLAGS    := -c -Wall
else
$(error no build type defined)
endif
endif

# Put objects in the output directory.
OUT_O_DIR   := $(OUT_DIR)/objs

#---------------------------------------------------------------------
# settings
#---------------------------------------------------------------------
OBJS = $(SOURCES:.cpp=.o)
DIRS = $(subst /,/,$(sort $(dir $(OBJS))))
DIR_TARGET = $(OUT_DIR)

OUTPUT_TARGET = $(OUT_DIR)/$(TITLE_NAME)

CC_FLAGS +=   

LCF_FLAGS := 

LD_FLAGS := 

#---------------------------------------------------------------------
# executables
#---------------------------------------------------------------------
MD := mkdir
RM := rm
CC := g++

#---------------------------------------------------------------------
# rules
#---------------------------------------------------------------------
.PHONY: all clean title 

all: title 

clean:
    $(RM) -rf $(OUT_DIR)

$(DIR_TARGET):
    $(MD) -p $(DIRS)

.cpp.o: 
    @$(CC) -c $< -o $@

$(OBJS): $(OUT_O_DIR)/%.o: %.cpp
    @$(CC) -c $< -o $@

title: $(DIR_TARGET) $(OBJS)

推荐答案

这会做到 - 假设一个类 Unix 环境.

This would do it - assuming a Unix-like environment.

MKDIR_P = mkdir -p

.PHONY: directories

all: directories program

directories: ${OUT_DIR}

${OUT_DIR}:
        ${MKDIR_P} ${OUT_DIR}

这必须在顶级目录中运行 - 否则 ${OUT_DIR} 的定义必须相对于它运行的位置正确.当然，如果你遵循彼得米勒的递归生成被认为有害"论文，那么您无论如何都会在顶级目录中运行 make.

This would have to be run in the top-level directory - or the definition of ${OUT_DIR} would have to be correct relative to where it is run. Of course, if you follow the edicts of Peter Miller's "Recursive Make Considered Harmful" paper, then you'll be running make in the top-level directory anyway.

我现在正在玩这个 (RMCH).它需要对我用作测试场的软件套件进行一些调整.该套件有十几个独立的程序，其源代码分布在 15 个目录中，其中一些是共享的.但只要稍加小心，就可以做到.OTOH，它可能不适合新手.

I'm playing with this (RMCH) at the moment. It needed a bit of adaptation to the suite of software that I am using as a test ground. The suite has a dozen separate programs built with source spread across 15 directories, some of it shared. But with a bit of care, it can be done. OTOH, it might not be appropriate for a newbie.

如评论中所述，将mkdir"命令列为目录"的操作是错误的.正如评论中所指出的，还有其他方法可以修复导致的不知道如何进行输出/调试"错误.一种是删除对目录"行的依赖.这是有效的，因为如果要求它创建的所有目录都已经存在，'mkdir -p' 不会产生错误.另一种是显示的机制，如果目录不存在，它只会尝试创建目录.修正后"版本是我昨晚想到的 - 但是这两种技术都可以工作(如果输出/调试存在但是是文件而不是目录，则两种技术都会出现问题).

As noted in the comments, listing the 'mkdir' command as the action for 'directories' is wrong. As also noted in the comments, there are other ways to fix the 'do not know how to make output/debug' error that results. One is to remove the dependency on the the 'directories' line. This works because 'mkdir -p' does not generate errors if all the directories it is asked to create already exist. The other is the mechanism shown, which will only attempt to create the directory if it does not exist. The 'as amended' version is what I had in mind last night - but both techniques work (and both have problems if output/debug exists but is a file rather than a directory).

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