CODEWITHSUNDEEP
linuxlinux-kernel
Jon Sherman
Jon Sherman

Reputation: 117

Adding an entry to the Linux Kernel .config file

How can I manually add the line CONFIG_XILINX_FIXED_DEVTREE_ADDR=y to the linux config file? It keeps getting overwritten when I build the kernel

Upvotes: 4

Views: 5367

Answers (2)

wxz
wxz

Reputation: 2546

If the config variable you're trying to add is new (as in, not in .config at all and not showing up in make menuconfig), then you should add it to the relevant Kconfig file. For instance, if you look at fs/proc/Kconfig, you can see how different proc config options are laid out. Follow their example and add your config variable, its variable type, the default, and its description. Then you should see it in make menuconfig.

Here's an example of a config variable definition in fs/proc/Kconfig:

config PROC_VMCORE
    bool "/proc/vmcore support"
    depends on PROC_FS && CRASH_DUMP
    default y
    help
      Exports the dump image of crashed kernel in ELF format.

Upvotes: 0

Youngdo Lee
Youngdo Lee

Reputation: 158

You can build by make CONFIG_XILINX_FIXED_DEVTREE_ADDR=y without adding it into .config. But if you gonna add it to .config, you should use make menuconfig to select it and save it into .config.

Upvotes: 2

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