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

Wed Jul 9 05:29:58 PDT 2014

Sorry, Markus.
Ignore my previous post. It has error.

I think you need to check the output of "bitbake -e <recipe name>" and see how the .config file is created for your recipe.
Based on that only we need to update the recipe.

Regards,
B.Sathish Kumar

-----Original Message-----
From: Sathish Kumar Balasubramaniam -ERS, HCL Tech 
Sent: Wednesday, July 09, 2014 5:54 PM
To: Dr. Markus Eich; yocto at yoctoproject.org
Subject: RE: [yocto] How to select defconfig for kernel build with yocto/bitbake

Ok. Can you try the following instead of the content I gave before

KERNEL_DEFCONFIG = "odroidxu_ubuntu_defconfig"

kernel_do_configure_append() {
	install -m 0644 ${S}/arch/${ARCH}/configs/${KERNEL_DEFCONFIG} ${WORKDIR}/defconfig
	install -m 0644 ${S}/arch/${ARCH}/configs/${KERNEL_DEFCONFIG} ${S}/.config
}

Regards,
B.Sathish Kumar

-----Original Message-----
From: Dr. Markus Eich [mailto:markus.eich at dfki.de] 
Sent: Wednesday, July 09, 2014 5:39 PM
To: Sathish Kumar Balasubramaniam -ERS, HCL Tech; yocto at yoctoproject.org
Subject: Re: [yocto] How to select defconfig for kernel build with yocto/bitbake

Thank you Sathish for the quick answer.

The recipes now copies odroidxu_ubuntu_defconfig to defconfig in the 
workdir, but it still seems to be ignored.
Maybe I am missing some includes to make the .config from defconfig?

Using "make odroidxu_ubuntu_defconfig" using cross compiling (followed 
by "make zImage") works fine, while bitbake virtual/kernel produces some 
errors which are probably due to the wrong .config.

Cheers,

Markus

On 09.07.2014 13:33, Sathish Kumar Balasubramaniam -ERS, HCL Tech wrote:
> Hi Markus,
>
> Try adding the following to your recipe file
>
> KERNEL_DEFCONFIG = "odroidxu_ubuntu_defconfig"
>
> do_configure_prepend() {
>          install -m 0644 ${S}/arch/${ARCH}/configs/${KERNEL_DEFCONFIG} ${WORKDIR}/defconfig || die "No default configuration for ${MACHINE} / ${KERNEL_DEFCONFIG} available."
> }
>
>
> Regards,
> B.Sathish Kumar
>
> -----Original Message-----
> From: yocto-bounces at yoctoproject.org [mailto:yocto-bounces at yoctoproject.org] On Behalf Of Dr. Markus Eich
> Sent: Wednesday, July 09, 2014 3:09 PM
> To: yocto at yoctoproject.org
> Subject: [yocto] How to select defconfig for kernel build with yocto/bitbake
>
> Dear all,
>
> I work on the process to compile odroid xu kernel with yocto/bitbake
>
> In the kernel sources (from hardkernel) I have the corresponding
> defconfig file, i.e. in the git folder
> /arch/arm/configs/odroidxu_ubuntu_defconfig.
>
> How can I tell bitbake in my recipe to use "odroidxu_ubuntu_defconfig"?
>
> My recipe looks as follow:
>
> ===
> require recipes-kernel/linux/linux-yocto.inc
>
> KERNEL_IMAGETYPE = "uImage"
>
> COMPATIBLE_MACHINE = "odroid-xu"
>
> LINUX_VERSION = "3.4.91"
> LINUX_VERSION_EXTENSION = "-custom"
>
> FILESEXTRAPATHS_prepend := "${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
>
>
>
>

-- 
Dr.-Ing. Markus Eich

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