Anyone experiencing these warnings when compiling projects with Eigen and EIGEN_USE_MKL_ALL flag defined? I'm following the instructions here: http://eigen.tuxfamily.org/dox/TopicUsingIntelMKL.html. This only happens when I #include <Eigen/Eigenvalues>
Example of compile log:
eigen3.2.1\eigen\src/Eigenvalues/RealSchur_MKL.h(76): warning C4244: 'initializing' : conversion from '__int64' to 'int', possible loss of data eigen3.2.1\eigen\src/Eigenvalues/ComplexSchur_MKL.h(87): warning C4244: 'initializing' : conversion from '__int64' to 'int', possible loss of data eigen3.2.1\eigen\src/Eigenvalues/SelfAdjointEigenSolver_MKL.h(80): warning C4244: 'initializing' : conversion from '__int64' to 'int', possible loss of data
I know what these warnings mean, but to resolve them I would need to change the library code. Short of suppressing these warnings, do you have any suggestions (just in case somehow I have missed something)?
On 64 bit platforms Eigen uses 64 bit integers to encode the dimensions of its matrices. The MKL wrapper uses 32 integers, which might overflow if your matrix size exceeds 2 billion rows or columns.