I'm trying to compile the ArduinoMagCal.ino sketch from RTIMULib on a Teensy 3.2, but I keep running into 'undefined reference' issues:

HTML Code:
Compiling debug version of 'ArduinoMagCal' for 'Teensy 3.2 / 3.1'
ArduinoMagCal.cpp.o*: In function setup
ArduinoMagCal.ino:42: undefined reference to calLibRead(unsigned char, CALLIB_DATA*)

Error linking for board Teensy 3.2 / 3.1
Debug build failed for project 'ArduinoMagCal'
ArduinoMagCal.ino:55: undefined reference to RTIMU  createIMU(RTIMUSettings*)
ArduinoMagCal.cpp.o*: In function loop
ArduinoMagCal.ino:64: undefined reference to RTVector3  RTVector3()
ArduinoMagCal.ino:94: undefined reference to calLibWrite(unsigned char, CALLIB_DATA*)
ArduinoMagCal.ino:68: undefined reference to RTVector3  operator=(RTVector3 const&)
ArduinoMagCal.cpp.o*: In function __static_initialization_and_destruction_0
ArduinoMagCal.ino:33: undefined reference to RTIMUSettings  RTIMUSettings()
collect2.exe*: error: ld returned 1 exit status
This project compiles fine when targeted for a Arduino Mega 2560. Am I missing something obvious?