In qt5/qtbase, after https://qt.gitorious.org/qt/qtbase/commit/8c680aceaa0e1f132501ad15c48bc549fd3fd39d, it support "-debug -no-framework" build for qt5 But QtWebKit/qt-modularization-base branch, 5ed0c6a101104572d494d53cdfd65a0c8e6e01c0 doesn't support it. Error like attachement.
Created attachment 98161 [details] QtWebKit build error log
The Qt port has been removed from WebKit, resolving.