In file: `~/rpi/qt-everywhere-src-5.15.0/qtbase/src/corelib/text/qbytearray.h` add line : `#include <limits>` Otherwise, building proccess for **qtbase** breaks.
In file:
~/rpi/qt-everywhere-src-5.15.0/qtbase/src/corelib/text/qbytearray.hadd line :
#include <limits>Otherwise, building proccess for qtbase breaks.