Merge pull request DGtal-team#1197 from elcerdo/fixEigenBuild

Fix eigen build

Author: dcoeurjo

ChangeLog.md

@@ -102,6 +102,8 @@
    [#1193](https://github.com/DGtal-team/DGtal/pull/1193))
 
 - *DEC Package*
+ - Fix compatibility with eigen 3.2.8 by changing default index type for sparse matrix.
+   (Pierre Gueth, [#1197](https://github.com/DGtal-team/DGtal/pull/1197))
  - Fixing warnings in DiscreteExteriorCalculus and DiscreteExteriorCalculusFactory.
    (Roland Denis, [#1139](https://github.com/DGtal-team/DGtal/pull/1139))
 

src/DGtal/math/linalg/EigenSupport.h

@@ -52,11 +52,14 @@
 #include <iostream>
 #if defined(__GNUG__)
 #pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpragmas"
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#pragma GCC diagnostic ignored "-Wignored-attributes"
 #endif
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wdocumentation"
+#pragma clang diagnostic ignored "-Wignored-attributes"
 #endif
 #include <Eigen/Dense>
 #include <Eigen/Sparse>
@@ -96,7 +99,7 @@ struct EigenLinearAlgebraBackend
     typedef Eigen::MatrixXd DenseMatrix;
 
     typedef Eigen::Triplet<double> Triplet;
-    typedef Eigen::SparseMatrix<DenseVector::Scalar, Eigen::ColMajor> SparseMatrix;
+    typedef Eigen::SparseMatrix<DenseVector::Scalar, Eigen::ColMajor, long int> SparseMatrix;
 
     typedef Eigen::SimplicialLLT<SparseMatrix> SolverSimplicialLLT;
     typedef Eigen::SimplicialLDLT<SparseMatrix> SolverSimplicialLDLT;