linux内核配置的格式化打印

感谢@jeff-schaller 的重播，我为 Kconfiglib 项目做出了贡献，现在这个任务有一个新的示例脚本。这些是使用它的步骤：

在包含 linux 源代码的目录中，克隆 repo：

root@23e196045c6f:/usr/src/linux-source-4.9# git clone git://github.com/ulfalizer/Kconfiglib.git
Cloning into 'Kconfiglib'...
remote: Counting objects: 3367, done.
remote: Compressing objects: 100% (57/57), done.
remote: Total 3367 (delta 64), reused 89 (delta 50), pack-reused 3259
Receiving objects: 100% (3367/3367), 1.25 MiB | 1.79 MiB/s, done.
Resolving deltas: 100% (2184/2184), done.

修补生成文件：

root@23e196045c6f:/usr/src/linux-source-4.9# patch -p1 < Kconfiglib/makefile.patch
patching file scripts/kconfig/Makefile

根据需要进行配置，基本上是为了获取 .config 文件：

root@23e196045c6f:/usr/src/linux-source-4.9# make menuconfig

使用配置文件运行脚本：

root@23e196045c6f:/usr/src/linux-source-4.9# make scriptconfig SCRIPT=Kconfiglib/examples/print_config_tree.py SCRIPT_ARG=.config

======== Linux/x86 4.9.65 Kernel Configuration ========

[*] 64-bit kernel (64BIT)
    General setup
        ()  Cross-compiler tool prefix (CROSS_COMPILE)
        [ ] Compile also drivers which will not load (COMPILE_TEST)
        ()  Local version - append to kernel release (LOCALVERSION)
        [ ] Automatically append version information to the version string (LOCALVERSION_AUTO)
        -*- Kernel compression mode
                --> Gzip (KERNEL_GZIP)
                    Bzip2 (KERNEL_BZIP2)
                    LZMA (KERNEL_LZMA)
...

但好处是可以传递不同的内核配置并轻松匹配更改：

root@23e196045c6f:/usr/src/linux-source-4.9# make scriptconfig SCRIPT=Kconfiglib/examples/print_config_tree.py SCRIPT_ARG=/tmp/config1 > config1-list.txt

root@23e196045c6f:/usr/src/linux-source-4.9# make scriptconfig SCRIPT=Kconfiglib/examples/print_config_tree.py SCRIPT_ARG=/tmp/config2 > config2-list.txt

最后现在使用差异工具：