Real-time support for Beaglebone using Yocto

Hi,

I am using Beaglebone Platform and I want to build the linux kernel with real-time support in ti using Yocto.
In yocto, we can create a core-image-rt image, which has a rt support, but I am getting errors when I try to build a core-image-rt.
Whereas I am able to build core-image-console, core-image-sato, core-image-minimal, these images for beaglebone.

So is there any machine specific configuration, to build core-image-rt for beaglebone?

Thanks.

You'll probably get better answers on the Yocto lists since the BeagleBone is one of their reference platforms.