Configure fails with: "libQt5PlatformSupport not found"

[Robinson-George]

With everything upgraded to the latest versions according to the guide in the README.asciidoc, the configure script fails with "libQt5PlatformSupport not found" right after the message: "checking for main in -lQt5PlatformSupport ...no".

Of course QT5 is installed ... I guess its version is too new for the stupid configure script.
The file "bitcoin_qt.m4" is patched ( the string "-lqwindows" was replaced with "-lQt5PlatformSupport -lqwindows" )

P.S.
Also, I had to add the option "--with-incompatible-bdb" to the "configure" arguments, because it was aborting after complaining, that a different version of DB Berkely than 4.8 was found ...probably, too new again.