Current source doesn't build

1.If you are not familiar with dealing with some compilation errors, i sugguest you always not try to build the latest one.
You can pick one when it isn't updated for a few days, that would be more likely to be built smoothly.
2.I don't know, or even see your build log. So unfortunately no help could be provided currently. If you want something to be dealt, make sure you'll meet the correct guys, and give out some details such as screenshot or build log or other.

Hope you will have successfully build it soon. Yes you can also pick the version hashes which the autobot uses. - with proper tools.