"So in conclusion in order to get the 9-21-16 build to work for a BBB Rev A6 (2GB), I used an SD card and did as Mirko suggested:
You can use the SD card as file system as well, you have to change the last line from /boot/uEnv.txt from …"

""sudo apt-get install pkg-config" seems to work for the Debian build. This may need to be added to the instructions."

"Linus,
Thanks for your input. However I get:
      Unable to locate package pkg-config-arm-linux-gnueabihf
when trying to run this.
Justin Linus said:
Hi Justin,

i ran into this as well today:

linus@desk:~/ardupilot$ waf configure --board=bbbmini…"

"The error message is saying that it looked in /usr/bin, and arm-linux-gnueabihf-pkg-config does exist there, so I'm not clear on whether there is a find error, or it is failing on the symbolic link not resolving as there is no pkg-config anywhere.…"

"Mirko,
Per my earlier note from an hour ago, there is evidence that I did execute this step 11 successfully:
"lrwxrwxrwx 1 root root 10 Sep 23 09:13 /usr/bin/arm-linux-gnueabihf-pkg-config -> pkg-config"
Yet the 'waf config step' fails. (As the link…"

"The file does appear to be on the path at /usr/bin and is a link:
lrwxrwxrwx 1 root root 10 Sep 23 09:13 /usr/bin/arm-linux-gnueabihf-pkg-config -> pkg-configYet the linked to file pkg-config does appear to be missing.

Justin C said:
Same issue…"

"Same issue found when doing a cross compile. Thus, the issue appears to be separate from the specific BBB build. Justin C said:
So for the 9-11 image I changed the line to: #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh.
During the…"

"I have had no luck trying to connect to the 9-21 build via SSH. This is after flashing it to a BBB rev A6. Only the D2 light is flashing, so its not quite the same as the 9-11 build. When booting off of the SD card for the 9-11 build there was not…"

"So for the 9-11 image I changed the line to: #cmdline=init=/opt/scripts/tools/eMMC/init-eMMC-flasher-v3.sh.
During the Compile step: waf configure --board=bbbmini I ran into the following issue:

Checking for program 'arm-linux-gnueabihf-pkg-config'…"

"During the Flash the lights go from D2-D5 and back again few a few minutes, they the system shuts down. When attempting to boot D2 and D3 light and I am unable to make an SSH connection."