... big snip ...
apparently, i have some reading to do. i guess i'm spoiled by earlier boards like the beaglebone black, where building a bootable SD card was trivially easy. anyway, off to the docs.
rday
p.s. just as a closer, what i'm after is, well, a doc entitled, "so, you want to build an SD card bootable image from the meta-qcom layer?". that's where i'm trying to go with this.