Ok I see now, that when I configure with toolchain for armbcm from raspbian, it fails, but not because of the compiler ( make goes much further). I will search for another toolchain. I'm curious if the application made by such configured and built qtbase (with previously mentioned armbcm toolchain) will work on Banana.
Now only I have to eliminate the problem with qt ide remote connection
(error "Server sent invalid f"). If anybody knew how, it would be a blessing for me.