Documentation request -- How to install an extension straight from source?

[jackdpeterson]

Sample extension: https://github.com/mote0230/dbase-pecl-php7

Target environment: PHP 7.0, of course!

What's the appropriate way to get this to work? prior to using this module ... I would have either defined a selection of execs with some testing ... or pre-compile and just define the file types as appropriate.

How would one install a custom extension that's not on PECL or other providers (like apt or a PPA) using this module?