Location of link file that tells the compiler where the source code files to compile are

Thank you. I've been trying that for over a year now, and still no luck.

What I did was I created a folder raspvisor underneath the applications folder:
C:DerrickGitHubRT-Threadrt-thread_hypervisorbspraspberry-piraspi4-64applicationsraspvisor

Within is my source code plus a SConscript file, whose contents I pasted below:

from building import *

cwd     = GetCurrentDir()
src     = Glob('*.c') + Glob('*.cpp')
CPPPATH = [cwd, str(Dir('#'))]

group = DefineGroup('Raspvisor', src, depend = [''], CPPPATH = CPPPATH)

Return('group')

Yet it still isn't picked up. Makes no sense as I followed the pattern of the SConscript files in the folders above, and I return the folders to build.

My only thought is I might need to specify this directory in the top folder's SConscript file, but I cannot find it there. What am I doing wrong?