Eigen::SparseLU compilation warning

Sat Mar 12, 2016 1:42 am

This question is same as I've posted here, but nobody answered yet, so I hope here is the more reasonable place to ask.

I'm trying to work with Eigen (latest version) and get some troubles.
Please explain me what am I doing wrong or how to remove the following compilation warning (compiled with Visual Studio C++)

the last line produces several warnings similar to the following (all in sparselu.h)

warning C4244: 'initializing': conversion from '__int64' to 'int', possible loss of data
with
[
Derived=Eigen::Matrix<std::complex<double>,-1,1,0,-1,1>
]

Changing the matrix type to

doesn't help and complaint again, but with different warnings, e.g.

sparselu.h(462) : warning C4244 : 'argument' : conversion from '__int64' to 'int', possible loss of data
sparselu.h(416) : note : while compiling class template member function 'void Eigen::SparseLU<SpMat,Eigen::COLAMDOrdering<__int64>>::analyzePattern(const Eigen::SparseMatrix<Complex,0,__int64> &)'
sparselu.h(115) : note : see reference to function template instantiation 'void Eigen::SparseLU<SpMat,Eigen::COLAMDOrdering<__int64>>::analyzePattern(const Eigen::SparseMatrix<Complex,0,__int64> &)' being compiled
note : see reference to class template instantiation 'Eigen::SparseLU<SpMat,Eigen::COLAMDOrdering<__int64>>' being compiled
sparselu_panel_bmod.h(209) : warning C4244 : 'argument' : conversion from '__int64' to 'const int', possible loss of data
sparselu_panel_bmod.h(59) : note : while compiling class template member function 'void Eigen::internal::SparseLUImpl<std::complex<double>,__int64>::panel_bmod(const Index,const Index,const Index,const Index,Eigen::Matrix<std::complex<double>,-1,1,0,-1,1> &,Eigen::Matrix<std::complex<double>,-1,1,0,-1,1> &,Eigen::Matrix<__int64,-1,1,0,-1,1> &,Eigen::Matrix<__int64,-1,1,0,-1,1> &,Eigen::internal::LU_GlobalLU_t<Eigen::Matrix<__int64,-1,1,0,-1,1>,Eigen::Matrix<std::complex<double>,-1,1,0,-1,1>> &)'
with
[
Index = __int64
]

michaelmedvinsky Registered Member Posts 2 Karma 0	Eigen::SparseLU compilation warning Sat Mar 12, 2016 1:42 am This question is same as I've posted here, but nobody answered yet, so I hope here is the more reasonable place to ask. I'm trying to work with Eigen (latest version) and get some troubles. Please explain me what am I doing wrong or how to remove the following compilation warning (compiled with Visual Studio C++) Code: Select all `typedef std::complex<double> Complex; typedef Eigen::SparseMatrix<Complex> SpMat; typedef Eigen::VectorXcd SpVec; typedef Eigen::SparseLU<SpMat> SolverT; SpMat m_Matrix; SpVec m_Rhs; SolverT LU(m_Matrix); VectorXcd x = LU.solve(m_Rhs);` the last line produces several warnings similar to the following (all in sparselu.h) warning C4244: 'initializing': conversion from '__int64' to 'int', possible loss of data with [ Derived=Eigen::Matrix<std::complex<double>,-1,1,0,-1,1> ] Changing the matrix type to Code: Select all `typedef Eigen::SparseMatrix<Complex,Eigen::ColMajor, __int64> SpMat;` doesn't help and complaint again, but with different warnings, e.g. sparselu.h(462) : warning C4244 : 'argument' : conversion from '__int64' to 'int', possible loss of data sparselu.h(416) : note : while compiling class template member function 'void Eigen::SparseLU<SpMat,Eigen::COLAMDOrdering<__int64>>::analyzePattern(const Eigen::SparseMatrix<Complex,0,__int64> &)' sparselu.h(115) : note : see reference to function template instantiation 'void Eigen::SparseLU<SpMat,Eigen::COLAMDOrdering<__int64>>::analyzePattern(const Eigen::SparseMatrix<Complex,0,__int64> &)' being compiled note : see reference to class template instantiation 'Eigen::SparseLU<SpMat,Eigen::COLAMDOrdering<__int64>>' being compiled sparselu_panel_bmod.h(209) : warning C4244 : 'argument' : conversion from '__int64' to 'const int', possible loss of data sparselu_panel_bmod.h(59) : note : while compiling class template member function 'void Eigen::internal::SparseLUImpl<std::complex<double>,__int64>::panel_bmod(const Index,const Index,const Index,const Index,Eigen::Matrix<std::complex<double>,-1,1,0,-1,1> &,Eigen::Matrix<std::complex<double>,-1,1,0,-1,1> &,Eigen::Matrix<__int64,-1,1,0,-1,1> &,Eigen::Matrix<__int64,-1,1,0,-1,1> &,Eigen::internal::LU_GlobalLU_t<Eigen::Matrix<__int64,-1,1,0,-1,1>,Eigen::Matrix<std::complex<double>,-1,1,0,-1,1>> &)' with [ Index = __int64 ]
ggael Moderator Posts 3447 Karma 19 OS	Re: Eigen::SparseLU compilation warning Sat Mar 12, 2016 9:01 pm What do you mean by "latest"? 3.2.8? 3.3-beta1? devel branch? Anyway, I cannot see such warnings in our msvc builds. Which version of msvc are you using?
michaelmedvinsky Registered Member Posts 2 Karma 0	Re: Eigen::SparseLU compilation warning Mon Mar 14, 2016 7:47 pm Thanks for your answer, Microsoft Visual Studio Community 2015 version 14.0.242720.00 Update 1 Visual C++ 2015 00322-20000-00000-AA565 The Eigen version is 3.2.8 more precisely eigen-eigen-07105f7124f9. I didn't install anything just copied the Eigen subdirectory to the project (visual studio for some reason didn't recognize it when I put the original location in path to the Additional including directories) any ideas? perhaps some invalid project properties that I could use?

Eigen::SparseLU compilation warning

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Eigen::SparseLU compilation warning

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