The Makefile for SnackLinux has been updated, I made it a bit easier to build SnackLinux from scratch. I'd like to update GCC to at least 5.x something, and add a few more packages to SnackLinux. Eventually, adding a PKGBUILD-like system to fbpkg would be preferable. Right now, it's just a bunch of instructions on the snacklinux.com.
I've spent the last week or two working on SnackLinux, a small Linux distro. I managed to get uClibc in there, as well as tcc, which makes it somewhat useful. The source of it all is there, so you can compile the distro yourself (sans the packages). There are also ISOs which you can download here and fire them up in a virtual machine.