Installing font packages
I’m trying to install several font packages (frontproto, inputproto, kbproto, renderproto, xproto, xetproto) in an Ubuntu 20.04 system using either apt or compiling them from source. However, I don’t know any source and apt-cache search is coming back empty.
Those aren’t font packages, they’re development packages shipping pkg-config configuration files (kbproto.pc etc.), among other things.
On Ubuntu you need to install x11proto-dev:
sudo apt install x11proto-dev