This is an Arduino library that enables you attach an interrupt to any pin of Arduino Uno, Nano, Mini and other 328-based boards. The Arduino attachInterrupt() function only allows pines 2 & ~3.
An Atmega328 sketch using an added .cpp file with attachInterrupt(....) and detachInterrupt(...) statements compiles successfully in the Arduino IDE 1.8.6 with no errors. However the same sketch gives ...