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d24f9f9b55
NVCC does not understand `__forceinline`, so we need to use `inline` when compiling for GPU. ICC specializes `std::complex` operators for `float` and `double` by default, which cannot be used on device and conflict with Eigen's workaround in CUDA/Complex.h. This can be prevented by defining `_OVERRIDE_COMPLEX_SPECIALIZATION_` before including `<complex>`. Added this define to the tests and to `Eigen/Core`, but this will not work if the user includes `<complex>` before `<Eigen/Core>`. ICC also seems to generate a duplicate `Map` symbol in `PlainObjectBase`: ``` error: "Map" has already been declared in the current scope static ConstMapType Map(const Scalar *data) ``` I tracked this down to `friend class Eigen::Map`. Putting the `friend` statements at the bottom of the class seems to resolve this issue. Fixes #2180
Eigen is a C++ template library for linear algebra: matrices, vectors, numerical solvers, and related algorithms.
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