How to correctly disable JIT in Qt Webkit 5.3.2 aka where is the -no-javascript-jit option

Hi all, what’s the proper way to disable JIT’ing for Webkit in Qt 5.3.2? For now, I’ve DEFINE’d ENABLE_JIT=0 in …\qtbase\mkspecs\win32-msvc2012\qmake.conf Is there a proper way of doing it? Thanks in advance P.S.: This one never got answered: http://www.qtcentre.org/threads/56964-Is-it-possible-to-turn-off-JIT-in-Qt5-Webkit