First, let me inform you that there are two debugger plugins in the Geany-Plugins package you can choose from: - the debugger plugin - the scope plugin
If the configure script tells you that the debugger plugin is not enabled than a requirement to build the debugger plugin is missing. It could be that the VTE package is missing on your system.
Please follow one of the steps below, depending on your GTK version: - if you are building for GTK2 please try ```sudo apt-get install libvte-dev``` - if you are building for GTK3 please try ```sudo apt-get install libvte-2.91-dev```
After that please run ```./configure``` again. Does it say ```yes``` now?