yaml_cpp_cmake_options = cmake.subproject_options() yaml_cpp_cmake_options.add_cmake_defines({ 'CMAKE_POLICY_VERSION_MINIMUM': '3.5' }) yaml_cpp_sp = cmake.subproject( 'yaml-cpp', options: yaml_cpp_cmake_options, ) yaml_cpp_dep = yaml_cpp_sp.dependency('yaml-cpp') add_project_arguments('-I' + meson.current_build_dir() + '/subprojects/yaml-cpp/__CMake_build', language: 'cpp')