Two Artemis compile errors: SPI reset and dtostrf()

Development Boards Artemis
1

With code that works on an UNO:

The SPI control register reset ‘SPCR = 0’ using the SDFat library results in:

‘SPCR’ was not declared in this scope

Using dtostrf() function results in:

‘dtostrf’ was not declared in this scope

Thanks

2

to use dtostrf() on the artemis you must first:

#include <avr/dtostrf.h>