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From Arduino - CurieIMU
Compatible with Arduino and Genuino 101 only
The CurieIMU library is only compatible with the Arduino/Genuino 101 board. You’re compiling for the Arduino/Genuino Uno. If you actually have a 101 then you need to select Tools > Board > Arduino/Genuino 101. If you have an Uno then you won’t be able to use this library.