Now, "Build project/target", "Compile single file", "Clean project/target", "Ask if rebuild is needed" & "Silent build" for the project are set to "$makefile". I guess that this is what you meant when you wrote "change the "Make" commands in the projects "Build options" to just $makefile".
The "Make commands" for Debug & Release are empty.
the Makefile is executable.
When I hit ctrl+F9. I get this:
-------------- Build: Debug in my_proj_name ---------------
Using makefile: Makefile
/bin/sh: Makefile: not found
Process terminated with status 127 (0 minutes, 0 seconds)
0 errors, 0 warnings (0 minutes, 0 seconds)