Hi!
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Recently I packaged mpd for NixOS [1] and found one problem. mpd's configure uses pkgconfig to find libmad. There was no mad.pc in NixOS and I was surprised to find that Arch Linux, Gentoo and Debian patch libmad to install mad.pc. So I took patch from Arch Linux [2]. I think it would be good to add this patch to libmad sources, what do you think?
[1] http://nixos.org [2] http://repos.archlinux.org/wsvn/packages/libmad/trunk/libmad.patch
-- Александр Цамутали