How to program an Arduino Uno Pro with a makefile? I'm using Arduino Makefile to compile sketches for Uno and Mega boards. I'm now trying to compile a sketch for an Arduino Uno Pro, which is an Uno with a replaced chip to give it features more like a Mega.

When writing a makefile to compile for this board, which BOARD_TAG should I use? I don't see this board listed in the official Arduino or Arduino Makefile docs.
After you edit your boards.txt file to incorporate the Arduino Uno Pro section from near the end of that Arduino Uno Pro webpage at hobbytronics.co.uk that you referenced, the board tag list produced by make show_boards will include the following line:

uno_pro       Arduino Uno*Pro


indicating the tag should be uno_pro.