message: Fix for Windows build.
diff: return res;
  }
  };
  +--- a/Eigen/src/Core/MathFunctions.h 2020-01-09 14:22:30.000000000 -0800
  ++++ b/Eigen/src/Core/MathFunctions.h 2020-01-09 16:35:29.000000000 -0800
  +@@ -442,9 +442,11 @@
  + {
  + EIGEN_STATIC_ASSERT((!NumTraits<Scalar>::IsComplex), NUMERIC_TYPE_MUST_BE_REAL)
  + #if EIGEN_HAS_CXX11_MATH
  +- EIGEN_USING_STD_MATH(rint);
  +-#endif
  ++ EIGEN_USING_STD_MATH(rint);
  + return rint(x);
  ++#else
  ++ return ::rint(x);
  ++#endif
  + }
  + };
  +
  +@@ -454,7 +456,7 @@
  + EIGEN_DEVICE_FUNC
  + static inline float run(const float& x)
  + {
  +- return rintf(x);
  ++ return ::rintf(x);
  + }
  + };
  + #endif
  