[yocto] why do some openstack layer.conf files add classes to BBFILES?

[Robert P. J. Day]

  just noticed the following property for a bunch of the openstack
layers at:

http://git.yoctoproject.org/cgit/cgit.cgi/meta-cloud-services/tree/

some of the layer.conf files contain the line:

BBFILES += "${LAYERDIR}/recipes*/*/*.bb ${LAYERDIR}/recipes*/*/*.bbappend ${LAYERDIR}/classes/*.bbclass"

why is the classes/ directory being appended to BBFILES? i thought the
purpose of BBPATH was to contain locations of .conf and .bbclass
files. i'm puzzled by the above.

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
========================================================================