I'm building a custom kernel for the beaglebone black. Following this guide (http://android.serverbox.ch/?p=1273) I'm able to boot to console successfully using a base image.
When I try to build with the realtime kernel patch using command:
bitbake core-image-rt I get the following error messages:
Loading cache: 100% |###############################| ETA: 00:00:00 Loaded 1222 entries from dependency cache. Parsing recipes: 100% |#############################| Time: 00:00:00 Parsing of 862 .bb files complete (861 cached, 1 parsed). 1221 targets, 61 skipped, 0 masked, 0 errors. NOTE: Resolving any missing task queue dependencies NOTE: multiple providers are available for virtual/kernel (linux-yocto, linux-dummy) NOTE: consider defining a PREFERRED_PROVIDER entry to match virtual/kernel ERROR: Nothing PROVIDES 'linux-yocto-rt' (but /home/ste/yocto/poky/meta/recipes-rt/images/core-image-rt.bb DEPENDS on or otherwise requires it) ERROR: linux-yocto-rt was skipped: incompatible with machine beaglebone (not in COMPATIBLE_MACHINE) ERROR: linux-yocto-rt was skipped: incompatible with machine beaglebone (not in COMPATIBLE_MACHINE) ERROR: linux-yocto-rt was skipped: incompatible with machine beaglebone (not in COMPATIBLE_MACHINE) ERROR: Required build target 'core-image-rt' has no buildable providers. Missing or unbuildable dependency chain was: ['core-image-rt', 'linux-yocto-rt'] Summary: There were 2 ERROR messages shown, returning a non-zero exit code. I applied the suggestions in the README file (or think I did...):
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 But still get the same error messages.
Has anyone had any success with building a realtime kernel using Yocto ? Unable to find a definitive procedure anywhere for this.