CODEWITHSUNDEEP
c++visual-studio-2015eigencgal
Hugo Katur
Hugo Katur

Reputation: 41

CGAL Error: Eigen3 is required -> Eigen seems to be okay though

When running my program with this CGAL include for example:

#include <CGAL/Epick_d.h>

I get two error messages that read:

C1189 #error: Eigen3 is required

and

#error directive: Requires Eigen

They direct to cartesian_la_base.h and constructors.h respectively. There I find the following piece of code:

#ifndef CGAL_EIGEN3_ENABLED 
#error Requires Eigen
#endif

So it seems to me that the CGAL_EIGEN3_ENABLED flag is not set. I cannot find a problem with either CGAL or Eigen though, so I am a bit puzzled as to why this is happening. I set an environment variable to .../Eigen and included the directory under Properties -> c/c++ -> General -> Additional Include Directories as well as in Linker -> General.

Strangely enough, there seems to be virtually no-one else to receive the same error-message, judging from my success with googling the matter.

I use Visual Studio 2015.

Hopefully this is enough information. Cheers

Upvotes: 2

Views: 1823

Answers (1)

Hugo Katur
Hugo Katur

Reputation: 41

In my case, adding the line

#define CGAL_EIGEN3_ENABLED

solved the problem. So it seems the only issue was the flag not being set correctly.

Upvotes: 2

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