# usage:
# FetchContent_MakeAvailable(Eigen)
# target_link_libraries(${PROJECT_NAME} PRIVATE Eigen3::Eigen)

if (NOT DEFINED EIGEN_GIT_TAG)
    message(FATAL_ERROR "EIGEN_GIT_TAG is not defined.\n see https://gitlab.com/libeigen/eigen and grab a release tag.\n example: set(EIGEN_GIT_TAG 3.4.0)")
endif()

FetchContent_Declare(
        Eigen
        GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
        GIT_TAG ${EIGEN_GIT_TAG}
        GIT_SHALLOW TRUE
        GIT_PROGRESS TRUE
)
set(EIGEN_BUILD_DOC OFF)
set(BUILD_TESTING OFF)
set(CMAKE_Fortran_COMPILER_WORKS ON)
set(EIGEN_BUILD_PKGCONFIG OFF)

include(${CMAKE_SOURCE_DIR}/cmake/Utils.cmake)
print_git_tag(${EIGEN_GIT_TAG})