Imported project can't debug imported core library source level

[JamesCaska]

Not being an AVR expert I am struggling to figure out the correct settings to enable debugging of the library level. ie if I step into and Arduino function such as digitalWrite() I want to be able to debug at the source code level.

I know it's possible because when I use Atmel Studio to create an Arduino Sketch project and then import that project into MPLABX I can debug the core sourcecode in the simulator ( but only in Release mode ).

Atmel Studio creates two separate projects, a Sketch and a Core project. I have all projects pointed to the same toolchain that ships with the Arduino platform.

I noticed that the Atmel project uses 's' optimisation and this might be related. Anyhow I will keep searching but it might be useful to add a 'debug core' option to the importer to setup a configuration suitable for debugging the core level.