On an up to date stretch, I want to install libmysqlclient-dev libmysqld-dev, but apt tells me it was not available in my sources.
/etc/opt/sources.list looks like this:
deb http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi
deb-src http://raspbian.raspberrypi.org/raspbian/ stretch main contrib non-free rpi
deb https://download.webmin.com/download/repository sarge contrib
deb-src http://raspbian.raspberrypi.org/raspbian/ jessie main contrib non-free rpi
deb-src http://mirrordirector.raspbian.org/raspbian/ wheezy main contrib non-free rpi
I wonder what could be wrong?