compile error

Arduino: 1.8.8 (Linux), TD: 1.45, Board: "Teensy 3.6, Serial, 180 MHz, Faster, US English"

simpleneopixeldemo: In function 'void sendBit(bool)':
simpleneopixeldemo:68: error: '_SFR_IO_ADDR' was not declared in this scope
       [port]    "I" (_SFR_IO_ADDR(PIXEL_PORT)),
                                             ^
simpleneopixeldemo:92: error: '_SFR_IO_ADDR' was not declared in this scope
       [port]    "I" (_SFR_IO_ADDR(PIXEL_PORT)),
                                             ^
simpleneopixeldemo: In function 'void show()':
simpleneopixeldemo:151: error: '_delay_us' was not declared in this scope
   _delay_us( (RES / 1000UL) + 1);       // Round up since the delay must be _at_least_ this long (too short might not work, too long not a problem)
                                ^
simpleneopixeldemo: In function 'void theaterChase(unsigned char, unsigned char, unsigned char, unsigned char)':
simpleneopixeldemo:225: warning: comparison between signed and unsigned integer expressions 
         if (step==q) {
                 ^
simpleneopixeldemo: In function 'void loop()':
simpleneopixeldemo:360: warning: large integer implicitly truncated to unsigned type 
   rainbowCycle(1000 , 20 , 5 );
                              ^
'_SFR_IO_ADDR' was not declared in this scope

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