new_parralelism

eigen.cmake
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			set(_working_dir ${PROJECT_BINARY_DIR}/third-party/src/eigen-download)
			configure_file(${PROJECT_SOURCE_DIR}/third-party/eigen.cmake.in ${_working_dir}/CMakeLists.txt)

			if(NOT EXISTS ${PROJECT_SOURCE_DIR}/third-party/eigen/CMakeLists.txt)
			message(STATUS "Downloading eigen")
			execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
			RESULT_VARIABLE result WORKING_DIRECTORY ${_working_dir}
			OUTPUT_FILE ${_working_dir}/configure-out.log
			ERROR_FILE ${_working_dir}/configure-error.log)

			execute_process(COMMAND "${CMAKE_COMMAND}" --build .
			WORKING_DIRECTORY ${_working_dir}
			OUTPUT_FILE ${_working_dir}/build-out.log
			ERROR_FILE ${_working_dir}/build-error.log)
			endif()

			set(BUILD_TESTING OFF CACHE BOOL "" FORCE)

			add_subdirectory(third-party/eigen)

			set(EIGEN3_LIBRARIES Eigen3::Eigen CACHE INTERNAL "")

			get_cmake_property(_cache_variables CACHE_VARIABLES)
			foreach(_var ${_cache_variables})
			if(_var MATCHES "^EIGEN_")
			mark_as_advanced(${_var})
			endif()
			if(_var MATCHES "^CUDA_")
			mark_as_advanced(${_var})
			endif()
			if(_var MATCHES "^PASTIX_")
			mark_as_advanced(${_var})
			endif()
			if(_var MATCHES "^QT_")
			mark_as_advanced(${_var})
			endif()
			if(_var MATCHES "^RT_")
			mark_as_advanced(${_var})
			endif()

			endforeach()