Please replace `#include "Arduino.h"` -> `#include <Arduino.h>`

[zackees]

When I integrated your libraries, I left in the #include "Arduino.h" that was found in __pixeltypes.h

Even though nothing included your code, merely having this include broke uno, attiny and many others at the linking stage for timer_millis().

I have no idea why this is but I suspect it has something to do with the build system doing magic behind the scenes.

There were two fixes that I found:

• Change it to #include <Arduino.h>
• Just remove the arduino include completely

I went with option #2 for fastled, but option #1 would be appropriate to your library.