building libraries with mingw

[Saro Engels]

I currently try to make kde-network compile with mingw and there are 
still some errors left; Since I wanted to get jabber support as well, I 
try to build libidn myself, but I had no luck yet.
So to Christian and Ralf: can you point me to how you're making your 
packages for the installer? I am mostly interested in the setup for the 
build environment, since msys doesn't do what it should.
Thanks in advance
SE