RE: [eigen] no matching function for call to 'abs(const float&)'

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cmath has been included.

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> Date: Thu, 27 Aug 2015 13:25:32 -0400
> From: ilja.j.honkonen@xxxxxxxx
> To: eigen@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [eigen] no matching function for call to 'abs(const float&)'
> Hello
> > OK, replacing line 44 of Eigen/src/Core/functors/UnaryFunctors.h with:
> > EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const result_type operator()
> > (const Scalar& a) const { using std::fabs; return fabs(a); }
> Will this work even if cmath hasn't been included at all?
> Ilja

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