Added arduino libs

libraries/EnableInterrupt/examples/ATtinyBlink/ATtinyBlink.ino

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+#include <EnableInterrupt.h>
+
+#ifdef EI_ATTINY24
+#define OUTPUTPIN 10     // == B0
+#define INTERRUPTEDPIN 9 // == B1
+// Modify this at your leisure. But you must be aware of which port it's on (see below).
+#elif defined EI_ATTINY25
+#define OUTPUTPIN 0      // == B0
+#define INTERRUPTEDPIN 1 // == B1
+#else
+#error Dang, only ATtiny chips supported by this sketch.
+#endif
+
+// Connect a LED to Pin 3. It might be different in different ATtiny micro controllers
+//const uint8_t outputBitMask = 0x01;
+const uint8_t outputBitMask = digital_pin_to_bit_mask_PGM[OUTPUTPIN];
+const uint8_t inputBitMask = digital_pin_to_bit_mask_PGM[INTERRUPTEDPIN];
+
+volatile uint16_t endlessCounter=0; // The count will go back to 0 after hitting 65535.
+volatile uint8_t interruptState=0;
+
+void interruptFunction() {
+  if (interruptState) {
+    interruptState=0;
+    PORTB &= ~_BV(outputBitMask);
+  } else {
+    interruptState=1;
+    PORTB |= 1 << outputBitMask;
+  }
+}
+
+// the setup routine runs once when you press reset:
+void setup() {
+  DDRB |= outputBitMask; // OUTPUTPIN is set to output
+  DDRB &= ~inputBitMask; // INPUTPIN is set to input
+  PORTB |= inputBitMask; // Pull up the resistor
+  MCUCR &= ~PUD; // ensure Pull Up Disable is off
+  enableInterrupt(INTERRUPTEDPIN, interruptFunction, CHANGE);
+}
+ 
+// the loop routine runs over and over again forever:
+void loop() {
+  //digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
+  //delay(1000);               // wait for a second
+  //digitalWrite(led, LOW);    // turn the LED off by making the voltage LOW
+  //delay(1000);               // wait for a second
+  endlessCounter++; // give it something to do
+}

libraries/EnableInterrupt/examples/ATtinyBlink/Makefile

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+## Arduino Makefile, see https://github.com/sudar/Arduino-Makefile (it's awesome!)
+ARDUINO_DIR = /home/schwager/bin/arduino-1.8.5
+
+# ISP_PORT          = /dev/ttyACM0
+#BOARD_TAG         = attiny85at8
+BOARD_TAG         = attiny44at8
+ALTERNATE_CORE    = tiny
+BOARDS_TXT = ~/sketchbook/hardware/arduino-tiny/boards.txt
+ARDUINO_CORE_PATH = /home/schwager/sketchbook/hardware/arduino-tiny/cores/tiny
+# ARDUINO_VAR_PATH  = ~/sketchbook/hardware/arduino-tiny/cores/tiny
+#AVR_TOOLS_DIR = /home/schwager/bin/arduino-1.8.4/hardware/tools/avr
+
+CFLAGS_STD = -g
+CXXFLAGS_STD = -g
+
+ISP_PROG = usbtiny
+F_CPU = 1000000L
+
+include /usr/share/arduino/Arduino.mk