compilation checkpoint 2

cores/arduino/delay.c

cores/arduino/delay.h

cores/arduino/startup.c

cores/arduino/syscalls.c

...duino/validation/build_gcc/debug_arduino_zero/IPAddress.o

...s/arduino/validation/build_gcc/debug_arduino_zero/delay.o

...s/arduino/validation/build_gcc/debug_arduino_zero/hooks.o

cores/arduino/validation/build_gcc/debug_arduino_zero/itoa.o

...arduino/validation/build_gcc/debug_arduino_zero/startup.o

...rduino/validation/build_gcc/debug_arduino_zero/syscalls.o

cores/arduino/validation/build_gcc/debug_arduino_zero/test.o

.../arduino/validation/build_gcc/debug_arduino_zero/wiring.o

...no/validation/build_gcc/debug_arduino_zero/wiring_shift.o

cores/arduino/validation/build_gcc/test.mk

cores/arduino/validation/test.cpp

cores/arduino/wiring.c

cores/arduino/wiring.h

cores/arduino/wiring_digital.c.disabled

cores/arduino/wiring_shift.c