在编译内核模块时需要有关启用配置的帮助

问题描述

我正在使用3.10.x内核树.我的内核模块需要配置VIDEOBUF2.

I am using 3.10.x kernel tree. My kernel module needs config VIDEOBUF2.

在drivers/media/v4l2-core/Kconfig中定义:

That is defined in drivers/media/v4l2-core/Kconfig:

# Used by drivers that need Videobuf2 modules
config VIDEOBUF2_CORE
    select DMA_SHARED_BUFFER
    tristate

因此我将"CONFIG_VIDEOBUF2_CORE = y"放入内核配置文件中，编译.从Kconfig它有CONFIG_VIDEOBUF2_CORE没有依赖关系，我认为向我的内核添加CONFIG_VIDEOBUF2_CORE = y配置应该工作.我修改了正确的内核配置文件，因为我设置其他标志，例如CONFIG_VIDEO_DEV = y，就可以了.

So I put 'CONFIG_VIDEOBUF2_CORE=y' in my Kernel config file andcompile. From the Kconfig it has CONFIG_VIDEOBUF2_CORE has nodependency and I think adding CONFIG_VIDEOBUF2_CORE=y to my kernelconfig should work. I am modify the right kernel config file since Iset other flags like CONFIG_VIDEO_DEV=y and that works.

生成的.config不包含'CONFIG_VIDEOBUF2_CORE = y'

The generated .config does not contain 'CONFIG_VIDEOBUF2_CORE=y'

编译失败，并显示一堆

undefined reference to `vb2_buffer_done'
undefined reference to `vb2_buffer_done'
undefined reference to `vb2_buffer_done'
undefined reference to `vb2_buffer_done'

如果有人可以帮助我，我真的很感激.

I really appreciate if someone can help me with this.

谢谢.

推荐答案

我不能直接对此主题发表评论，因为要获得此特权，它需要50个声望.您可以执行:make ARCH = target_architecture CROSS_COMPILE = toolchain defconfig_file.该命令执行将在内核源的主目录中创建一个.config文件.该文件将包含目标SOC上外围设备的默认配置(我假设您具有有关defconfig文件的知识).现在，如果您想操作它并希望添加设备支持，请执行:make menuconfig，您可以通过选择配置(例如VIDEOBUF2_CORE)来添加设备支持，然后准备编译/交叉编译内核代码.编译. PS:避免手动编辑.config文件.

I cant directly comment on the subject as it requires 50 reputations to have this privilege. You can do : make ARCH = target_architecture CROSS_COMPILE = toolchain defconfig_file. This command execution will create a .config file in home directory of your kernel source. This file would contain default configuration for the peripherals on your target SOC ( I assume you have knowledge pertaining to defconfig files). Now if you wish to manipulate it and want to add your device support to it do : make menuconfig and you could add your device support by selecting configuration say like VIDEOBUF2_CORE in your case and then your kernel soure is ready to be compiled/cross-compiled. PS: Avoid editing .config file manually.

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