In case a citation is needed: https://en.wikipedia.org/wiki/Clang > Apple chose ...

		gnat on April 20, 2018 \| parent \| context \| favorite \| on: Apple open-sources FoundationDB In case a citation is needed: https://en.wikipedia.org/wiki/Clang > Apple chose to develop a new compiler front end from scratch, supporting C, Objective-C and C++. This "clang" project was open-sourced in July 2007.