depends libxslt &&
depends popt &&
optional_depends X11-LIBS \
                 '--with-x'  \
                 ''  \
                 'to use X'  && 
optional_depends qt-x11 \
                 '--with-qt-dir=/usr --with-qt-includes=/usr/include/qt --with-qt-libraries=/usr/lib' \
                 '' \
                 'to build a GUI'
