This programming language is built for people who likes C. Designed with modern features such as metaprogramming, methods, namespaces, auto variable type deduction and more. Visit the website to know more.
Yes you can replace LibC. Just use "cp1 c" command to output C codes and then use appropriate command line arguments to gcc or clang to use newlib-nano. I cannot give direct instructions for you to use newlib-nano because I'm not yet familiar with that library.