Building Rosegarden trunk

I’m working my way through building Rosegarden from SVN on Fedora 12, and thought I would jot down my settings for posterity. My default QTDIR was incorrect for Qt4 (/usr/lib/qt-3.3), which made configure fail. Following a patch in a gentoo bug for the ebuild package, I ran configure with the following inscrutable command line:
./configure --prefix=/usr/local --with-qtdir=$(pkg-config --variable=prefix Qt) --with-qtdir=/usr