如何解决STM32F103ZET6与MPU9250错误？

linking...
..OBJMPU9250和f1.axf: Error: L6218E: Undefined symbol inv_enable_9x_sensor_fusion (referred from inv_mpu.o).
..OBJMPU9250和f1.axf: Error: L6218E: Undefined symbol inv_enable_fast_nomot (referred from inv_mpu.o).
..OBJMPU9250和f1.axf: Error: L6218E: Undefined symbol inv_enable_gyro_tc (referred from inv_mpu.o).
..OBJMPU9250和f1.axf: Error: L6218E: Undefined symbol inv_enable_magnetic_disturbance (referred from inv_mpu.o).
..OBJMPU9250和f1.axf: Error: L6218E: Undefined symbol inv_enable_quaternion (referred from inv_mpu.o).
..OBJMPU9250和f1.axf: Error: L6218E: Undefined symbol inv_enable_vector_compass_cal (referred from inv_mpu.o).
Not enough information to list image symbols.
Finished: 1 information, 0 warning and 6 error messages.
"..OBJMPU9250和f1.axf" - 6 Error(s), 0 Warning(s).
这些是什么错误呀？要怎么解决？