* glib/Makefile.am (libpoppler_glib_la_LIBADD): Link poppler-glib
        against poppler.

        * qt/Makefile.am (libpoppler_qt_la_LIBADD): Ditto for qt.

        * poppler-glib.pc (Libs): Drop -lpoppler from link.

        * poppler-qt.pc (Libs): Ditto for qt.

        * configure.ac: Test for both libqt-mt.la and libqt-mt.so in that
        order.