Can not find OpenGL/glu.h


I am writing some C++ project, where OpenGL/glu.h is required from Pangolin library, but can not be found.

I use MacOS 10.14.

I try to find glu.h inside /opt, /usr, /System folders, and indeed I can not find it.

But as I known from OpenGL website, there is no need to install anything on MacOS, so I did not find any installation guide at all.

What could I do to solve this? Thank you.

[li]Getting Started#macOS (OpenGL wiki)[/li][li]OpenGL Programming/Installation/Mac (wikibooks)[/li][li]Where are the OpenGL header files located on MacOSX? (stackoverflow)[/li][/ul]
Sounds like you need to install Xcode.