[yocto] How to select defconfig for kernel build with yocto/bitbake

[Bruce Ashfield]

On 14-07-09 05:38 AM, Dr. Markus Eich wrote:
> Dear all,
>
> I work on the process to compile odroid xu kernel with yocto/bitbake
>
> In the kernel sources (from hardkernel) I have the corresponding
> defconfig file, i.e. in the git folder
> /arch/arm/configs/odroidxu_ubuntu_defconfig.
>
> How can I tell bitbake in my recipe to use "odroidxu_ubuntu_defconfig"?

To trigger the oe-core kernel processing to use the defconfig, you need
to put that defconfig in your SRC_URI.

Which means you should grab a copy of that from the kernel tree, and
in the same directory structure as your kernel recipe.

See meta-skeleton/recipes-kernel/linux/linux-yocto-custom.bb for an
example.

Cheers,

Bruce


>
> My recipe looks as follow:
>
> ===
> require recipes-kernel/linux/linux-yocto.inc
>
> KERNEL_IMAGETYPE = "uImage"
>
> COMPATIBLE_MACHINE = "odroid-xu"
>
> LINUX_VERSION = "3.4.91"
> LINUX_VERSION_EXTENSION = "-custom"
>
> FILESEXTRAPATHS_prepend := "${THISDIR}/linux-hardkernel-3.4:"
>
> S = "${WORKDIR}/git"
>
> # from where to fetch the kernel
> KERNEL_REPO_OWNER ??= "hardkernel"
> KERNEL_REPO_URI ??= "git://github.com/${KERNEL_REPO_OWNER}/linux.git"
> KBRANCH = "odroidxu-3.4.y"
>
> SRCREV = "${AUTOREV}"
>
> KV = "3.4.91"
> PV = "${KV}+gitr${SRCPV}"
> LOCALVERSION ?= ""
>
>
> SRC_URI = " \
>    ${KERNEL_REPO_URI};nocheckout=1;branch=${KBRANCH} \
> "
>
> PACKAGES =+ "kernel-headers"
> FILES_kernel-headers = "${exec_prefix}/src/linux*"
> ===
>
> Cheers,
>
> Markus
>
>
>
>