CONFIG += enable_support_shaper core_windows { MSVC_VERSION_DETECT = $$(VisualStudioVersion) lessThan(MSVC_VERSION_DETECT, 16.0) { CONFIG -= enable_support_shaper } } core_linux { build_gcc_less_5:CONFIG -= enable_support_shaper } enable_support_shaper { DEFINES += SUPPORT_HARFBUZZ_SHAPER }