Eigen Basics

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example
├── CMakeLists.txt
├── eigen-3.3.9
│   ├── bench
│   ├── blas
│   ├── cmake
│   ├── CMakeLists.txt
│   ├── COPYING.BSD
│   ├── COPYING.GPL
│   ├── COPYING.LGPL
│   ├── COPYING.MINPACK
│   ├── COPYING.MPL2
│   ├── COPYING.README
│   ├── CTestConfig.cmake
│   ├── CTestCustom.cmake.in
│   ├── debug
│   ├── demos
│   ├── doc
│   ├── Eigen
│   ├── eigen3.pc.in
│   ├── failtest
│   ├── INSTALL
│   ├── lapack
│   ├── README.md
│   ├── scripts
│   ├── signature_of_eigen3_matrix_library
│   ├── test
│   └── unsupported
└── main.cpp

CMakeLists.txt
cmake_minimum_required(VERSION 3.15)

project(example LANGUAGES CXX)

include_directories(eigen-3.3.9)

find_package(OpenMP)
if (OPENMP_FOUND)
    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
endif()

add_compile_definitions(EIGEN_MPL2_ONLY)

add_executable(example main.cpp)

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