I've tried build linux-variscite where the maintainers seem to have
copied the 'merge_delta_config' task from the linux-qoriq recipe from
meta-freescale.
When i tried to use that task to add some linux kernel config flags it
did not work. It seems like the 'do_preconfigure' task inherited by the
'fsl-kernel-localversion' class deletes all content of the '.config'
file AFTER it has been merged by the 'merge_delta_config' task.
I reordered the tasks so that merge_delta_config is run after
preconfigure:
addtask merge_delta_config before do_configure after do_patch
do_preconfigure
which solved the problem for me. The flags were then added and compiled
into the kernel.
