如何为openwrt生成补丁

答:使用quilt工具

步骤如下:

1. 配置quilt

$cat> ~/.quiltrc <<EOF

QUILT_DIFF_ARGS="--no-timestamps --no-index -pab --color=auto"

QUILT_REFRESH_ARGS="--no-timestamps --no-index -pab"

QUILT_PATCH_OPTS="--unified"

QUILT_DIFF_OPTS="-p"

EDITOR="vim"

EOF

注意:EDITOR=”vim”指定默认的编辑器为vim

2. 为内核生成补丁示例

2.1   清空内核

make target/linux/{clean,prepare} V=s QUILT=1

2.2   创建内核补丁

切换到build_dir/target-<arch>/linux-<board>_<arch>/linux-<version>目录下(也就是openwrt的编译内核的目录)

quilt new my-patch.patch

将要修改的文件arch/arm/boot/dts/Makefile 添加进来以便与patch关联起来：quilt add arch/arm/boot/dts/Makefile

修改arch/arm/boot/dts/Makefile： quilt edit arch/arm/boot/dts/Makefile

quilt refresh (更新补丁)

经过以上操作，内核补丁作完毕,可以在build_dir/target-<arch>/linux-<board>_<arch>/linux-<version>/patches目录中找到补丁

2.3 将补丁放置到适当的目录

切换到openwrt的根目录

将patch会写到对应的补丁目录下：make target/linux/update