GNU Mes was created to address the security concerns that arise from
bootstrapping an operating system using binary blobs, which is common
practice for all software distributions.  Mes is a Scheme interpreter
written in a simple subset of C and a C compiler written in Scheme and
comes with a small, bootstrappable C library.  The Mes bootstrap has
halved the size of opaque, uninspectable binaries that were needed to
bootstrap GNU Guix, a functional GNU/Linux distribution that focusses on
user freedom, reproducibility and security.  That reduction was achieved
by replacing GNU Binutils, GNU GCC and the GNU C Library with Mes.  The
final goal is to help create a full source bootstrap for any interested
UNIX-like operating system.  After three years of volunteer work funding
will enable us to make another big step forward and reach an important
new milestone.

GNU Mes - https://gnu.org/software/mes
GNU Guix - https://gnu.org/software/guix
Bootstrappable Builds - https://bootstrappable.org
Reproducible Builds - https://reproducible-builds.org
Reduced Binary Seed bootstrap - http://joyofsource.com/reduced-binary-seed-bootstrap.html