[Yocto] How does VARIABLE_*_something works?

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[Yocto] How does VARIABLE_*_something works?

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ing_mtma
Contributor I

Hi,

I'm trying to build my own yocto_meta-layer based on the BeagleBoneBlack and in  ./meta-fsl-bsp-release/imx/meta-sdk/conf/distro/include/fsl-imx-preferred-env.inc I found something weird:

PREFERRED_PROVIDER_virtual/kernel_mx6 = "linux-imx"
PREFERRED_PROVIDER_virtual/kernel_mx6ul = "linux-imx"
PREFERRED_PROVIDER_virtual/kernel_mx6sll = "linux-imx"
PREFERRED_PROVIDER_virtual/kernel_mx7 = "linux-imx"

 

So i was wondering what does the last *_word (i.e. PREFERRED_PROVIDER_virtual/kernel_*  ) means?

does it is a way to set a virtual/kernel parser depending on the machine? 

If the latter is yes, how do i know which name to put? or What part of the machine_name.conf i need to choose?

Any help will be useful, if you can point me to a YOCTO Doc section where i can found the answer would it be great. 

Thanks!!!

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ing_mtma
Contributor I

answered here