Currently, I use mingw32-g++.exe (GNU GCC Compiler) for codeblock, with -std=C++14. The compiler was downloaded here: http://www.codeblocks.org/downloads/26
However, all tutorial programs here fail to compile: https://eigen.tuxfamily.org/dox/group__TutorialLinearAlgebra.html
The #include has been done correctly. Only the compute lines such as
Matrix2f x = A.ldlt().solve(b); and Matrix2f x = A.ldlt().solve(b);
fails. I also tried using the Intel C++ compiler, but it still fails.
What compilers should I download to use Eigen C++ ?
Thank you very much for your help
Update1: using the "Basic linear solving" example, I get this error:
File IndexedViewHelper.h:
"undefined reference to Eigen::fix<1>", line 57
"Undefined reference to Eigen::fix<0>"
Update 2: using the second example A.ldlt().solve(b), I get this:
"[ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]", line 100
"[ skipping 3 instantiation contexts, use -ftemplate-backtrace-limit=0 to disable ]", line 90
...
Update 3: Full code + compiler: Literally just one main.cpp file + add eigen folder to search directories
` #include <Eigen/Dense>
using namespace std;
using namespace Eigen;
int main()
{
Matrix2f A, b;
A << 2, -1, -1, 3;
b << 1, 2, 3, 1;
cout << "Here is the matrix A:\n"<< A << endl;
cout << "Here is the right hand side b:\n"<< b << endl;
Matrix2f x = A.ldlt().solve(b);
cout << "The solution is:\n"<< x << endl;
}`