Help installing Subsurface in Ubuntu?

[Frank O'Donnell]

 > Hi, I'm looking for help installing Subsurface under Ubuntu 16.04.

Just an update to my last message. I successfully installed Subsurface 
and can run it, and have also installed the dependencies required for 
smtk2ssrf (libglib2.0 and libmdb2).

Now, following the directions in the Subsurface 4.6 User Manual, I'm 
attempting to move to the source tree directory for Subsurface to build 
smtk2ssrf. The only issue is that I'm not able to find that directory.

Using find, the only directories named subsurface I locate are 
/usr/share/subsurface and /usr/share/doc/subsurface. I'm not finding 
anything related to Subsurface under /usr/src or /usr/local/src.

Is there something else I need to do to locate, or create, the source 
tree directory for Subsurface?