error: 'future_error' is unavailable: introduced in macOS 10.8

In file included from /Users/qt/work/qt/qtwebengine/src/core/location_provider_qt.cpp:48:
In file included from /Users/qt/work/install/lib/QtCore.framework/Headers/QThread:1:
In file included from /Users/qt/work/install/lib/QtCore.framework/Headers/qthread.h:52:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/future:1447:23: error: 'future_error' is unavailable: introduced in macOS 10.8
                      future_error(make_error_code(future_errc::broken_promise))
                      ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/future:502:63: note: 'future_error' has been explicitly marked unavailable here
class _LIBCPP_EXCEPTION_ABI _LIBCPP_AVAILABILITY_FUTURE_ERROR future_error
                                                              ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/future:1621:23: error: 'future_error' is unavailable: introduced in macOS 10.8
                      future_error(make_error_code(future_errc::broken_promise))
                      ^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/future:502:63: note: 'future_error' has been explicitly marked unavailable here
class _LIBCPP_EXCEPTION_ABI _LIBCPP_AVAILABILITY_FUTURE_ERROR future_error
                                                              ^
2 errors generated.
[18374/18451] CXX obj/QtWebEngineCore/print_view_manager_base_qt.o
In file included from /Users/qt/work/qt/qtwebengine/src/core/print_view_manager_base_qt.cpp:42:
In file included from /Users/qt/work/qt/qtwebengine/src/core/print_view_manager_qt.h:44:
/Users/qt/work/qt/qtwebengine/src/core/print_view_manager_base_qt.h:149:10: warning: private field 'm_isExpectingFirstPage' is not used [-Wunused-private-field]
    bool m_isExpectingFirstPage;
         ^
1 warning generated.
[18375/18451] CXX obj/QtWebEngineCore/browser_message_filter_qt.o
[18376/18451] CXX obj/QtWebEngineCore/content_client_qt.o
[18377/18451] CXX obj/QtWebEngineCore/certificate_error_controller.o
[18378/18451] CXX obj/QtWebEngineCore/print_view_manager_qt.o
[18379/18451] CXX obj/QtWebEngineCore/browser_context_qt.o
[18380/18451] CXX obj/QtWebEngineCore/browser_context_adapter.o
ninja: build stopped: subcommand failed.
make[4]: *** [run_ninja] Error 1
make[3]: *** [release-all] Error 2
make[2]: *** [sub-gn_run-pro-make_first] Error 2
make[1]: *** [sub-core-make_first] Error 2
make: *** [sub-src-make_first] Error 2