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The override syntax uses colon (':') instead of underscore ('_') since Honister (3.4), so let's update the README to use that new syntax. Cc: Quentin Schulz <foss+yocto@0leil.net> (From OE-Core rev: 97f0a73c0a9db5506310328cd29f165eab3c509d) Signed-off-by: Quentin Schulz <quentin.schulz@theobroma-systems.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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The recipes-rt recipes provide package and image recipes for using and testing the PREEMPT_RT kernel. The core-image-rt*.bb images are minimal images with a couple extra packages, including rt-tests. In order to build the image with the linux-yocto-rt kernel, be sure to include the following line in your local.conf, bblayers.conf, or your $MACHINE.conf.
PREFERRED_PROVIDER_virtual/kernel = "linux-yocto-rt"
If you are creating a new BSP which should use linux-yocto-rt by default, use the line above in the $MACHINE.conf in your BSP layer, and specify the following in a linux-yocto-rt bbappend recipe:
COMPATIBLE_MACHINE:$MACHINE = $MACHINE