Missing emccannon and interpreter python modules?

Hi,

I'm currently trying to piece together the different python modules that interact directly with linuxcnc. From what perusing around I've found that the following python modules get directly compiled from source:

From what I understanding the core modules for talking to linuxcnc are:
linuxcnc.so -> Allows access to interpreter through NML messages
_hal.so -> Used with wrapper hal.py to access hal (pins, components, ect...)
gcode.so -> Parse gcode? (Not sure what this is used for in a GUI yet)

On top of these three I've also seen the emccannon and interpreter modules mentioned in the documentation here:  linuxcnc.org/docs/html/remap/remap.html

But I don't see these modules being built into .so objects when compiling. On top of this I don't seem them anywhere in the submakefile under rs274ngc/ except being listed as source files. 

How do these modules get built? Am I missing something?

Also how do these modules differ from the linuxcnc and gcode modules?
I'm trying to get a better understanding of how linuxcnc works by playing around with the python exports from the source code.

For remap, there is a python interpreter embedded and invoked from the C (++?) code.
These are module that give the embedded python access to linuxcnc's internals.

This is a completely different interpreter that is used for GUI code.

Ok, do these both talk to the internals via NML channels? Also any clue why those two python modules are not built on compile?

read these docs
linuxcnc.org/docs/2.9/html/code/code-notes.html

the folders under /src/emc contain submake files which are called from the main make files