I am a newbie to the Linux kernel compilation and I am trying to create an Ubuntu core image. Although there is an image for Intel Joule I want to compile one of my own as I ll patch some changes later on in my project so it is good to know how to build using snapcraft.
I have followed the steps according to the "Board enablement overview" page from Ubuntu core.
Compiled the kernel snap (I took one of the reference kernel snaps available here), and the gadget snap from here.
Created the Json file and created the image as per the link but when I flashed it on a sd card and tried to boot. It hangs after I select Ubuntu core from the Grub menu. Am I missing any key things to be done or configured. The kernel from Git hub is supposed to be configured for x86_64 architecture.