Tips

• Overwriting Yocto Classes through meta-layer

No override or appends mechanism. But some workaround possible:

1. override variables in local.conf
2. create new conf file and inherit old one with require
3. create new conf file with the same name to mask old file (take care of layer priority)

When creatung new machine.conf based on existing one MACHINEOVERRIDES can be used:

machine-overrides-extender.bbclass

inherit logging
 
bb.debug("HELLO = %s" % HELLO)