Unsolved QtWebengine for raspberry Pi 3

[pirates21]

I installed a cross compiler for raspberry pi3 from the instructions on this page: http://jheyman.github.io/blog/pages/QtOnRaspberryPi/

I now wanted to install the QtWebengine module. I downloaded it from here: http://code.qt.io/cgit/qt/qtwebengine.git/
I want install it using these instructions:

cd qtwebengine
git submodule update --init
~ / raspi / qt5 / bin / qmake -r
make
sudo make install

After the command "~ / raspi / qt5 / bin / qmake -r" I get this error: "Using gcc version 4.8, but at least gcc version 5 is required to build qt Webengine. Qtwebengine will not be built"

I am asking for help with the solution. I'm quite a beginner.

[sierdzio]

Here is how you can build your own cross compiler for Raspberry Pi http://blog.felipe.rs/2015/01/20/how-to-build-a-gcc-cross-compiler-for-the-raspberrypi/

It will be tough.