[Insight-users] Very strange link error while using vnl_Quaternion

[Di Xiao]

Dear all:

  I got a very strange link error while using vnl_Quaternion (coming with 
itk lib).
  While I use some function in vnl_Quaternion, like .size(), .normalize() or 
.real() etc., there is no link error. But while I use .angle(), .inverse() 
and .rotate() etc. functions, there will have undefined reference errors, as 
  undefined reference to 
`vnl_quaternion<float>::operator*(vnl_quaternion<float> const&) const' .

Any suggestion for solving it is welcomed.

Thanks

Xiao Di

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