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Kernel selection using yocto

I am creating images for an IMX board using Yocto. My requirement is to build a specific core for the board. After downloading freescale yocto, I could see recipes for multiple kernels. Can you advise me on how yocto will decide which core to build. I mean, where is yocto configured to collect specific kerenle from available kernel recipes?

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You choose which kernel to build in your machine config, see the BSP manual and for example fooobar.com/questions/819530 / ...

Basically, you add



PREFERRED_PROVIDER_virtual/kernel = "my-kernel-recipe"

to your mymachine.conf

.

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You must have or create a kernel bb layer for the kernel source.

Once you have the kernel source, add the following to your local.conf file.

PREFERRED_PROVIDER_virtual/kernel ?= "<bb_layer_name>"
PREFERRED_VERSION_<bb_layer_name> ?= "<version>"

eg.



mkdir -p meta-imx/recipes-kernel/linux/linux-imx_4.11.bb

add whatever you want in bb file.

vi build/local.conf

# kernel preference    
PREFERRED_PROVIDER_virtual/kernel ?= "linux-imx"
PREFERRED_VERSION_linux-imx ?= "4.11%"

Once you get it over with, you can bundle build / local.conf into your target like local.conf.sample or whatever ever given a name.

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Go to meta-layer/conf/machine

then open the file selected-machine.conf

and find the macro

PREFERRED_PROVIDER_virtual/kernel 

PREFERRED_VERSION_<bb_layer_name> ?= "<version>"

the developers of the meta layers wrote the default kernel & version

here. If a.

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