OpenThread joiner API is no longer available in OpenThread MTD pre-built library with nRF Connect SDK version 2.6.1

Hi,

I have a project in which I'm using the nRF52840 with OpenThread and the device is configured as an MTD to minimize power usage. I have recently updated my nRF Connect SDK version from 2.4.0 to 2.6.1. A build problem that I ran into is that the OpenThread "joiner" API is no longer available in the pre-built OpenThread library for the MTD. I have worked around the problem by defining "CONFIG_OPENTHREAD_SOURCES=y", but at some point I would like to use a pre-built library to potentially simplify Thread certification.

Is there a reason the joiner API has been removed from the MTD pre-built library?

Is there some way I can use "CONFIG_OPENTHREAD_NORDIC_LIBRARY_MASTER" instead when building an MTD? When I try to use the master library I get the following error:

ninja: error: 'C:/ncs/v2.6.1/nrfxlib/openthread/lib/cortex-m4/hard-float/v1.3/master/libopenthread-mtd.a', needed by 'zephyr/zephyr_pre0.elf', missing and no known rule to make it

Or is there some alternative method I should be using to join the network? Currently I use a push-button press to trigger a call to "otJoinerStart". This is done after starting an "add joiner" process on the Commissioner device.

Shawn

0755.prj.conf

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