https://devzone.nordicsemi.com/f/nordic-q-a/16768/sdk12-dfu-compilation-errorI found we have to build micro-ecc.lib on our own, so I follow the below link to start to build it: Installing micro-ecc Then, we meet the below to errors: Makefile:69: Cannot find include folder: ../../config For workarround we made an emptyen-USTelligent Community 13Thu, 06 Oct 2016 01:05:14 GMThttps://devzone.nordicsemi.com/thread/64122?ContentTypeID=1Thu, 06 Oct 2016 01:05:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9ea13a68-8c3c-4ed2-9f14-abc3dee54bbcHenry<p>Thank you, is there any problem if we let it just empty?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/64121?ContentTypeID=1Fri, 30 Sep 2016 08:37:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:53e60ce6-e7d0-4887-bb6c-d3f19dc82e4cSrikar<p>config folder should contain sdk_config.h. If you are using example,It contains ../../config and sdk_config.h file</p><div style="clear:both;"></div>