[Linux From Scratch](http://www.linuxfromscratch.org/lfs) is a great
project that provides you with step-by-step instructions for building
your own custom Linux system, entirely from source code. To Keep It
Simple and Stupid as an educational project, LFS does not contain
instruction to build multilibs. I would discuss the changes of LFS/BLFS
procedure to make a GNU/Linux system with multilib support in this article.