This used to work about two weeks ago, but suddenly I can no longer build Qt without Phonon. On a clean builddir, I run

/local/git/Qt/qt/configure -prefix /local/qt4 -no-phonon -no-phonon-backend -declarative -qt-sql-sqlite -qt-sql-mysql -system-sqlite -reduce-relocations -graphicssystem raster -pch -nomake examples -nomake demos -nomake docs -nomake translations -continue -silent -reduce-relocations

then it says in the installation summary, that Phonon is not built (see attachment).

But later on, it builds (and installs) Phonon. The issue is that KDE trunk needs a newer Phonon, and I have to compile that separately from git.