if("icu" IN_LIST FEATURES) set(B2_REQUIREMENTS "<library>/user-config//icuuc <library>/user-config//icudt <library>/user-config//icuin <define>BOOST_HAS_ICU=1") if(APPLE) list(APPEND B2_OPTIONS cxxstd=11) endif() else() list(APPEND B2_OPTIONS --disable-icu) endif()