qmake.exefolder to system path
python.exefolder to system path
git.exefolder to system path
gperf.exefolder to system path
win_bison.exefolder to system path, and rename it to
Note: I didn't test for Visual Studio versions, all Qt versions.. Let's just take an example here, other versions should be about the same.
Steps to build
Developer Command Prompt for VS2013, and go to
qmake WEBENGINE_CONFIG+=use_proprietary_codecs qtwebengine.pro. We add this flag to enable mp3 support.
Note: Mp3 is not supported by QtWebEngine by default, due to license issue. Please make sure to get a license for the codec you added.