Instructions for building and installing Moses are online:
   http://www.statmt.org/moses/?n=Development.GetStarted
If you have g++ and Boost installed, and you want the default compilation with most of things you need, then run:
   ./bjam -j4

Questions should be directed to the mailing list (don't forget to register before sending emails):
   http://mailman.mit.edu/mailman/listinfo/moses-support
   https://github.com/moses-smt/mosesdecoder/compare/master...hieu2

Some of the code is not originally part of Moses, but is periodically copied
into the source tree from elsewhere:

 * "bjam-files" is taken from Boost.
 * "util" and "lm" are taken from KenLM: https://github.com/kpu/kenlm