part-1/armc-02 missing clflags

[mgcrea]

part-1/armc-02 won't compile as it is missing the -DRPIX cflags in the build.sh file L46.

Can do a PR if you want. Thanks for the great tutorial!

[BrianSidebotham]

Thanks @mgcrea - I've committed the fix. Sorry - still have a lot of changes in the works to get everything back up to speed. There's been a lot of change recently and adding support for RPI up to 4 has been a pain!