I have a very complex build that gets compiled in different ways, depending on the device I am building. It could be a Mega-based robot, an Uno-based Remote Controller or even a Nano-based small robot. Each device has its own configuration file that defines what libraries this device needs. For example, a Robot device needs Servo.h and BJDriverL298N to control the motors. A Remote Controller, on the other hand may need code to manage a Joystick but does not need the Servo or L298N code.

The problem I am seeing is that modules I don't need (e.g. Servo) are being included in builds, thus increasing the size of the output file to the point where it is too big for the processor.

How do I instruct the linker to only include the libraries that are explicitly included in the files being compiled?

The attached zip file contains the verbose compiler output and the generated object file contents.

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Are you using libraries as shared projects or just adding #include<> for libraries to your code?

I think a little bit of both. I have added explicit references to most libraries (NanoBot->Add->Reference) and each source file explicitly includes the libraries it needs.

Maybe tbis is a bug with shared library references. remove the refrence and ensure the libraries are bwlow the  "mydocuments\arduino\libraries". If you move the libraries click then rescan or restart the ide.

With deep search enbabled only the #included libs should be compiled.

Does this work?