I have a pins_arduino.h file for a given Arduino variant, installed in ~/sketchbook/hardware/attiny/variants/tiny14/pins_arduino.h. The IDE has no problem picking it up if I set the right board type. However, if I use a Makefile like this:
BOARDS_TXT = $(HOME)/sketchbook/hardware/attiny/boards-cli.txt
BOARD_TAG = attiny44-8
include /usr/share/arduino/Arduino.mk
then running make fails to compile it because of a missing pins_arduino.h. Moving the tiny14 directory to /usr/share/arduino/hardware/arduino/variants fixes the problem, but I don't want to pollute my system directory (and also, it sounds fragile if I ever remove/replace my Arduino software distribution).
How do I get the CLI Make toolchain to pick up my pins_arduino.h file from my ~/sketchbook?
