CMAKE配置eigen3.4.0

Eigen3编译教程（eigen3.3.9+vs2017+cmake超详细、末尾有编译结果）_老王敲代码的博客-优快云博客

参考上述完成配置，后续测试代码如下

cpp文件：

#include <iostream>
#include <Eigen/Dense>

//g++ Linear_algebra_and_decompositions.cpp -o la -I/download/eigen

using namespace std;
using namespace Eigen;


//计算特征值和特征向量
int main()
{
    Matrix2f A;
    A << 1, 2, 2, 3;
    cout << "Here is the matrix A:\n" << A << endl;
    SelfAdjointEigenSolver<Matrix2f> eigensolver(A);
    if (eigensolver.info() != Success) abort();
    cout << "The eigenvalues of A are:\n" << eigensolver.eigenvalues() << endl;
    cout << "Here's a matrix whose columns are eigenvectors of A \n"
        << "corresponding to these eigenvalues:\n"
        << eigensolver.eigenvectors() << endl;
}

cmake文件：

cmake_minimum_required (VERSION 3.8)

project ("eigtest1")
find_package (Eigen3 3.4 REQUIRED NO_MODULE)
add_executable (eigtest1 src/eigtest1.cpp)
target_link_libraries (eigtest1 Eigen3::Eigen)

mkdir build-cd build-cmake ..-以eigtest.cpp为启动项运行

运行成功截图：