fatal error: slu_Cnames.h: No such file or directory
i got this error message when i tried running the following code:

#define EIGEN_SUPERLU_SUPPORT
#include <iostream>
#include <Eigen/Sparse>
#include <vector>
typedef Eigen::SparseMatrix<double> SpMat; // declares a column-major sparse matrix type of double
typedef Eigen::Triplet<double> T;
#include <Eigen/SparseCore>
#include <Eigen/SuperLUSupport>

using namespace Eigen;
using Eigen::MatrixXd;

using namespace std;
int main() {
MatrixXd m(5, 5);
int row = 5, col = 5;
SparseMatrix<double> mat(row, col);

m << 2, 3, 0, 0, 0, 3, 0, -1, 0, 4, 0, 4, -3, 1, 2, 0, 0, 2, 0, 0, 0, 6, 0, 0, 1;
for (int c = 0; c < m.cols(); c++)
for (int r = 0; r < m.rows(); r++) {
// cout<<m(r,c)<<endl;
if (m(r, c) != 0)
mat.insert(r, c) = m(r, c);
}

for (int k = 0; k < mat.outerSize(); ++k)
for (SparseMatrix<double>::InnerIterator it(mat, k); it; ++it) {
cout << it.value();
cout << " row: " << it.row(); // row index
cout << " col: " << it.col(); // col index (here it is equal to k)
cout << " indx: " << it.index() << endl; // inner index, here it is equal to it.row()
}

VectorXd b(row), x(row);
b << 8., 45., -3., 3., 19.;

SuperLU<SparseMatrix<double> > solver;
solver.compute(mat);
cout << "compute result:: " << solver.info() << endl;

if (solver.info() != 0) {
cout << "decomposition failed" << endl;
return 0;
}
x = solver.solve(b);
if (solver.info() != 0) {
cout << "solving failed" << endl;
return 0;
}
// solve for another right hand side:
x = solver.solve(b);
cout << "solution: " << endl;
for (int i = 0; i < row; i++)
cout << x(i) << endl;

return 0;
}

Can someone help me. What did i get wrong?

To use SuperlU, you need to configure your project so that the compiler can find SuperLU headers and link to superlu library and its dependencies.

In the devel branch, we have a built-in SparseLU solver that does not require any dependecy.