Followed Issue #16 as it wasn't possible to compile the project! So I also changed the -march to -march=native 2x in the Makefile in examples. But when I write "sudo make" I get lots of reference errors:
oled_demo:cpp:(.text.startup+0x39e): undefined reference to 'ArduiPi_OLED::ArduiPi_OLED()' ...
is just one of these messages..