更新Linux内核头文件(linux headers)

一般来说，如果不是自己编译kernel，那么更新头文件是比较容易的事情，在Ubuntu/Fedora等操作系统上，可以直接安装相应的linux-headers软件包，下面就演示了在Ubuntu上安装内核头文件的过程。

master@jay-intel:~/workspace/c-study$ uname -r3.2.0-33-genericmaster@jay-intel:~/workspace/c-study$ apt-get install linux-headers-$(uname -r)Reading package lists... DoneBuilding dependency treeReading state information... Donelinux-headers-3.2.0-33-generic is already the newest version.linux-headers-3.2.0-33-generic set to manually installed.0 upgraded, 0 newly installed, 0 to remove and 331 not upgraded.

然而，如果自己编译Linux kernel并用它启动了系统，然后为了让本地程序基于当前kernel的headers来编译，就需要自己手动更新内核的头文件了。手动更新linux headers的步骤如下：
1. 在Linux kernel目录中，执行“make headers_install”命令，将headers安装到当前目录的usr/include/下面。
2. 将以前的headers备份：包括/usr/include/目录下的asm，asm-generic,linux等目录。
3. 将刚才生成的当前编译内核目录下的usr/include/中的asm，asm-generic,linux等目录复制到/usr/include/目录下即可。
（当然如果还需要更新其他的目录的头文件，也都可以一起复制过去。）

操作演示如下：

[root@jay-linux kvm.git]# make headers_install  CHK     include/generated/uapi/linux/version.h  WRAP    arch/x86/include/generated/asm/clkdev.h  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_32.h  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_64.h  SYSHDR  arch/x86/syscalls/../include/generated/uapi/asm/unistd_x32.h  SYSTBL  arch/x86/syscalls/../include/generated/asm/syscalls_32.h  SYSHDR  arch/x86/syscalls/../include/generated/asm/unistd_32_ia32.h  SYSHDR  arch/x86/syscalls/../include/generated/asm/unistd_64_x32.h  SYSTBL  arch/x86/syscalls/../include/generated/asm/syscalls_64.h  HOSTCC  arch/x86/tools/relocs  HOSTCC  scripts/unifdef  INSTALL include/asm-generic (35 files)  INSTALL include/drm (15 files)  INSTALL include/linux/byteorder (2 files)  INSTALL include/linux/caif (2 files)  INSTALL include/linux/can (5 files)  INSTALL include/linux/dvb (8 files)  INSTALL include/linux/hdlc (1 file)  INSTALL include/linux/hsi (1 file)  INSTALL include/linux/isdn (1 file)  <省略部分信息...>  INSTALL include/asm (64 files) [root@jay-linux include]# pwd/usr/include[root@jay-linux include]# mv asm asm_orig[root@jay-linux include]# mv linux linux_orig[root@jay-linux include]# mv asm-generic asm-generic_orig [root@jay-linux kvm.git]# pwd/root/kvm_demo/kvm.git[root@jay-linux kvm.git]# cp -r usr/include/asm /usr/include/[root@jay-linux kvm.git]# cp -r usr/include/asm-generic/ /usr/include/[root@jay-linux kvm.git]# cp -r usr/include/linux /usr/include/

Original article: 更新Linux内核头文件(linux headers)

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本文出自：http://smilejay.com, 原文地址：http://smilejay.com/2013/03/update-linux-headers/?utm_source=rss&utm_medium=rss&utm_campaign=update-linux-headers, 感谢原作者分享。