使用make文件来编译在不同的目录中的文件 [英] Using a make file to compile files in separate directories

问题描述

OK，我从来没有能掌握化妆，和生成文件。我试图通过与没有运气的联机帮助页阅读。所以，我来到这里：L

OK, I have never been able to grasp make, and makefiles. I've tried reading through the manpages with no luck. So I have come here :L

我有一堆开始变得非常不管理在一个文件中的文件。 （我试图使一个OS），我想尝试和拆分这些文件到不同的子目录（请参阅下面的结构），然后告诉做出'让'的文件到自己的.o文件，将它们转移到另一个独立的子目录，终于结束了一个内核文件。 （很抱歉，如果这听起来很复杂，希望结构将有助于使事情更清晰）

I have a bunch of files that are starting to get very un-managed in one file. ( I'm trying to make an OS ) And I want to try and split these files into separate sub-directories ( see structure below ) and then tell make to 'make' the files into an their .o files, moving them into another separate sub-directory and finally ending up with a kernel file. ( Sorry if that sounds complicated, hopefully the structure will help make things clearer )

所以这是我预期的结构树：

So this is my intended structure tree:

                                  Parent directory 
                           ( where the makefile will be )
                                          |
                                          |
     -------------------------------------------------------------------------
     |                 |                  |                |                 |
  Header SubDir      Source SubDir      ASM SubDir      Obj SubDir        Kern SubDir
(Header files )     (Source Files)     (Assembly Files)  (Object Files)   (Kernel File)

这是我目前的makefile：

This is my current makefile:

C_SOURCES= main.c
S_SOURCES= boot.s
C_OBJECTS=$(patsubst %.c, obj/%.o, $(C_SOURCES))
S_OBJECTS=$(patsubst %.s, obj/%.o, $(S_SOURCES))
CFLAGS=-nostdlib -nostdinc -fno-builtin -fno-stack-protector -m32 -Iheaders
LDFLAGS=-Tlink.ld -melf_i386 --oformat=elf32-i386
ASFLAGS=-felf

all: kern/kernel

.PHONY: clean
clean:
-rm -f kern/kernel

kern/kernel: $(S_OBJECTS) $(C_OBJECTS)
ld $(LDFLAGS) -o $@ $^

$(C_OBJECTS): obj/%.o : %.c 
gcc $(CFLAGS) $<

vpath %.c source

$(S_OBJECTS): obj/%.o : %.s
nasm $(ASFLAGS) $<

vpath %.s asem

现在它吐出这个错误：

It's now spitting out this error:

ld -Tlink.ld -melf_i386 --oformat=elf32-i386 -o kern/kernel obj/boot.o obj/main.o
ld: cannot find obj/boot.o: No such file or directory
ld: cannot find obj/main.o: No such file or directory

感谢提前任何帮助！

Thanks for any help in advance!

杰米。

推荐答案

让我们在这个阶段：

all: $(SOURCES) link

您不必建源，让我们离开了这一点。你真的想建立的是克恩/内核，让我们的使用，而不是抽象的链接：

You don't have to build the sources, so let's leave that out. And what you really want to build is kern/kernel, so let's use that instead of the abstract "link:

all: kern/kernel

kern/kernel:
    ld $(LDFLAGS) -o kernel $(SOURCES)

但要在的目标文件的，不是源文件链接，并在克恩/ <产生内核 / code>，而不是在父目录（这里我假设你将运行制作）

But you want to link the object files, not the source files, and produce kernel in kern/, not in the parent directory (where I assume you will be running make):

kern/kernel: $(OBJECTS)
    ld $(LDFLAGS) -o $@ $^

和哪些对象？好吧，我presume来源是 .S 文件和对象有不同的后缀相同的名称，并在不同的位置：

And what are the objects? Well, I presume the sources are the .s files, and the objects have the same names with a different suffix, and in a different location:

SOURCES=boot.s main.s monitor.s common.s descriptor_tables.s isr.s interrupt.s gdt.s timer.s kheap.s paging.s

OBJECTS=$(patsubst %.s,Obj/%.o,$(SOURCES))

这是你如何使一个对象：

And this is how you make an object:

$(OBJECTS): Obj/%.o : %.s
    nasm $(ASFLAGS) $<

vpath %.s Src

（即最后一行是这样做会知道在哪里可以找到源头。）

(That last line is so that Make will know where to find the sources.)

中的标志看起来不错。这里是干净的：

The flags look good. And here's clean:

.PHONY: clean
clean:
    -rm -f Obj/*.o kern/kernel

您正在尝试做了很多一次，所以这可能不会在第一次尝试工作。试一试，让我们知道结果。

You're trying to do a lot at once, so this probably won't work on the first try. Give it a whirl and let us know the result.

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