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。
|
1 2 3 4 5 6 7 8 9 |
master@jay-intel:~/workspace/c-study$ uname -r 3.2.0-33-generic master@jay-intel:~/workspace/c-study$ apt-get install linux-headers-$(uname -r) Reading package lists... Done Building dependency tree Reading state information... Done linux-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：
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 |
[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/ |
One Comment