Thanks for the links and the welcoming words. This is the motivation I need :) I'm currently busy with making my .deb package compatible to launchpad ppa as a quality measure.
Am I allowed to use full optimization (-Ofast) ? Or is it mandatory to use -O2 ?
I hope, this will find a sponsor. I contacted the Imagemagick package maintainers at first, before I submit a sponsorship-request. Wish me luck :)