Thanks a lot for your help.
I was with Ubuntu 16.04 and I was not having success in compilation process.
So I installed Ubuntu 14.04 and followed Toradex tutorial for Openembedded, also inserting this line in local.conf file:
PREFERRED_PROVIDER_virtual/kernel = “linux-toradex-rt”
Another change that I made was to disable Vivante driver support at file fsl-vivante-kernel-driver-handler.bbclass in directory meta-fsl-arm/classes/:
Handle Vivante kernel driver setting:
0 - machine does not have Vivante GPU driver support
1 - machine has Vivante GPU driver support
MACHINE_HAS_VIVANTE_KERNEL_DRIVER_SUPPORT ??= “0”
After these steps, I had just warnings with command:
Now my Colibri imx6 DL is running with RT kernel.
Thanks and have happy holidays.