Summary up below
https://github.com/OpenHEVC/openHEVC

What does openHEVC support?

Main Profile (all conformance bitstreams except BUMPING)
Main 10 Profile (except different combination of luma/chroma bitwidth)
Range extension (4:2:2/4:4:4)
Bitstream aligned with April 2014 HEVC standard
support of SHM4.1 bitstreams

What is the compiling infrastructure?

MSVC2013
gcc
clang

Where is the source code of openHEVC?

openHEVC is located at https://github.com/OpenHEVC/openHEVC.
openHEVC is under LGPL2.1 license
reusing ffmpeg runtime for multithreading