cmake_minimum_required(VERSION 3.7.2) project(date-download NONE) include(ExternalProject) ExternalProject_Add(date GIT_REPOSITORY https://github.com/HowardHinnant/date.git GIT_TAG v3.0.0 SOURCE_DIR "${CMAKE_BINARY_DIR}/date-src" BINARY_DIR "${CMAKE_BINARY_DIR}/date-build" CONFIGURE_COMMAND "" BUILD_COMMAND "" INSTALL_COMMAND "" TEST_COMMAND "" )