内核编译出错：multiple target patterns

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本文记录了一次在构建Linux内核时遇到的make失败问题及解决过程。问题表现为make操作后出现错误，通过深入分析Makefile并尝试不同命令，最终发现删除特定文件可以解决问题。

原文地址： http://blog.youkuaiyun.com/zjujoe/article/details/3185382

现象

从 svn 仓库check out 一份内核，然后make (该配置内置了initramfs 文件系统)，第一次make 成功，但是此后再也不行了！make , make clean 等后都会出错。给开发带来极大麻烦。

出错信息如下：

20081007_kernel>make

CHK include/linux/version.h

make[1]:`include/asm-arm/mach-types.h' is up to date.

CHK include/linux/utsrelease.h

CHK include/linux/compile.h

/home/zjujoe/svn/mhlv_2.6/working/songlixin/20081007_kernel/usr/Makefile:41:*** multiple target patterns. Stop.

make: *** [usr] Error2

20081007_kernel>make clean

CLEAN arch/arm/boot/compressed

CLEAN arch/arm/boot

CLEAN /home/zjujoe/svn/mhlv_2.6/working/songlixin/20081007_kernel

CLEAN arch/arm/kernel

CLEAN drivers/char

CLEAN init

CLEAN lib

/home/zjujoe/svn/mhlv_2.6/working/songlixin/20081007_kernel/usr/Makefile:41:*** multiple target patterns. Stop.

make: *** [_clean_usr] Error2

20081007_kernel>makedistclean

/home/zjujoe/svn/mhlv_2.6/working/songlixin/20081007_kernel/usr/Makefile:41:*** multiple target patterns. Stop.

make: *** [_clean_usr] Error2

问题解决

(同时打算再仔细研究一下 Makefile 语法:P)

google 了一下，查到文档:

http://www.ibm.com/developerworks/cn/linux/l-debugmake.html

该文档说make 时使用 -d 参数可以看到大量信息，试着用 make–d, 最后几行：

This program built fori486-pc-linux-gnu

Reading makefiles...

Reading makefile`scripts/Makefile.build'...

Reading makefile`include/config/auto.conf' (search path) (don't care) (no ~expansion)...

Reading makefile`scripts/Kbuild.include' (search path) (no ~expansion)...

Reading makefile`/home/zjujoe/svn/mhlv_2.6/working/songlixin/20081007_kernel/usr/Makefile'(search path) (no ~ expansion)...

Reading makefile`usr/.initramfs_data.cpio.gz.d' (search path) (no ~expansion)...

/home/zjujoe/svn/mhlv_2.6/working/songlixin/20081007_kernel/usr/Makefile:41:*** multiple target patterns. Stop.

Reaping losing child 0x080af520PID 6349

make: *** [usr] Error2

Removing child 0x080af520 PID6349 from chain.

看一下，usr/.initramfs_data.cpio.gz.d 为initramfs 的目录列表，

试着删除文件 usr/.initramfs_data.cpio.gz.d 再 Make, 居然不出错了！！！

20081007_kernel>rm -fusr/.initramfs_data.cpio.gz.d

20081007_kernel>make

CHK include/linux/version.h

make[1]:`include/asm-arm/mach-types.h' is up to date.

CHK include/linux/utsrelease.h

CHK include/linux/compile.h

MODPOSTvmlinux

Kernel:arch/arm/boot/Image is ready

Kernel:arch/arm/boot/zImage is ready

Building modules, stage2.

MODPOST 33modules