LPC810 mini ARM Prozessor in 8 pin dip package

ChrisMicro:
But when I press "compile", I get the following error:

/home/.../arduino-1.5.7/hardware/OpenNxp/LPC8/cores/lpc810/arduino.c:12:21: fatal error: arduino.h: No such file or directory
#include "arduino.h"

Where do I have to place the missing header files?

Sorry, that's a problem with case-sensitive file names, in Windows I get lazy. In file "OpenNxp\LPC8\cores\lpc810\arduino.c", it should include "Arduino.h" not "arduino.h". I think that is the only place.