OBNC (Oberon-07 Compiler) OBNC is a compiler for Niklaus Wirth's programming language Oberon. It implements the latest version of the language from 2016. OBNC translates source code written in Oberon to the C programming language, and the translated code is then compiled and linked with the C compiler of the host operating system. The build command obnc performs all these tasks and keeps track of which files need to be recompiled. It comes with a small basic library of seven modules defined in The Oakwood Guidelines for Oberon-2 Compiler Developers, to access files, output etc.