I have kept my Cores and Photons running older firmware where I can still use the:
FASTLED_USING_NAMESPACE;
#define PARTICLE_NO_ARDUINO_COMPATIBILITY 1
trick. I finally evolved the get-to-know-you projects I am doing with the mesh boards to the point where I needed to use FastLED, and I find I’m right back to the compiler error I got before the above trick:
fatal error
lib/FastLED/led_sysdefs.h:19:43: platforms/avr/led_sysdefs_avr.h: No such file or directory
Anyone have any success getting FastLED running on Mesh boards? At this point I will give up on the web IDE and compile locally if it means I can stop chasing down errors like this.