I've been following this tutorial trying to get working QT cross-compilation from my PC to a Raspberry Pi Zero W.
It is failing on Step 5 ("Install a bunch of development files").
sudo apt-get build-dep qt4-x11 results in this:
builddeps:qt4-x11 : Depends: debhelper (>= 9) but it is not installable Depends: default-libmysqlclient-dev ... ... (similar "depends" error continues about 20 lines) ... E: Unable to correct problems, you have held broken packages.
A similar situation results when running
sudo apt-get build-dep libqt5gui5.
sudo apt-get install libudev-dev reports
E: Unable to locate package libudev-dev, and fails.
This is my
deb http://mirrordetector.raspbian.org/raspbian stretch main contrib non-free rpi deb-src http://archive.raspbian.org/raspbian stretch main contrib non-free rpi