How do I configure the Linux kernel within Buildroot?

linux embedded kernel buildroot
Cogsy picture Cogsy · Sep 12, 2009 · Viewed 40k times · Source

I'm trying to build a rootfs for an x86 target, which is all simple enough. However I can't figure out how I configure the kernel that buildroot produces. The first run through came up with menuconfig, but it's cached the .config since then and I can't see where to change it.

~650MB of kernel modules don't do good things to an embedded target :P

Is there an easy way to configure the kernel within buildroot? Something like the uclibc-menuconfig target would be perfect.

Answer

Aleksandar picture Aleksandar · Aug 1, 2011

I always do the following:

  1. configure Linux kernel: make linux-menuconfig
  2. After leaving menuconfig your configuration will be stored in file: output/build/linux-XYZ/.config where XYZ is your kernel version.
  3. After that you can copy file output/build/linux-*XYZ*/.config to board/your_kernel_config/.config
  4. later in Buildroot menuconfig you can under kernel settings configure to use custom kernel config file and enter path: board/your_kernel_config/.config

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