Minimal gcc version for 5.3 and gcc used with distributed libraries

I looked in the forums and found that the recommended minimum gcc version is 4.7.2 but I could not found any official recommendation . In the Windows recommendation there is a section referring to MinGW under http://qt-project.org/doc/qt-5/windows-issues.html but there is nothing under http://qt-project.org/doc/qt-5/linux.html like you’d expect. Is there also any information which gcc was used to build the linux distribution libraries?