Unsolved Error error: symbol qt_version_tag has undefined version Qt_5.6 when Cross Compiling QT for Raspberry Pi

[madababi]

I tried to install qt 5.6 on raspberry usnig this tutorial http://exploreembedded.tumblr.com/post/115333857238/guide-to-cross-compile-qt-54-for-the-raspberry-pi however when i run make in the Setting Up and Building phase i got this error

/usr/bin/ld.gold: error: symbol qt_version_tag has undefined version Qt_5.5
/usr/bin/ld.gold: error: symbol qt_version_tag has undefined version Qt_5.6
collect2: error: ld returned 1 exit status
Makefile:1200: recipe for target '../../lib/libQt5Core.so.5.6.0' failed
make[3]: *** [../../lib/libQt5Core.so.5.6.0] Error 1
make[3]: Leaving directory '/opt/Qt5.6.0/5.6/Src/qtbase/src/corelib'
Makefile:139: recipe for target 'sub-corelib-make_first' failed
make[2]: *** [sub-corelib-make_first] Error 2
make[2]: Leaving directory '/opt/Qt5.6.0/5.6/Src/qtbase/src'
Makefile:45: recipe for target 'sub-src-make_first' failed
make[1]: *** [sub-src-make_first] Error 2
make[1]: Leaving directory '/opt/Qt5.6.0/5.6/Src/qtbase'
Makefile:71: recipe for target 'module-qtbase-make_first' failed
make: *** [module-qtbase-make_first] Error 2