Mine

g++  -Wall -W -Wpointer-arith -Wcast-align -Wsign-compare -Woverloaded-virtual -Wswitch  -Wno-unused-parameter -g -O2   -o inkscape --export-dynamic  main.o  libinkpre.a application/libinkapp.a ui/dialog/libuidialog.a dialogs/libspdialogs.a jabber_whiteboard/libjabber_whiteboard.a pedro/libpedro.a trace/libtrace.a svg/libspsvg.a widgets/libspwidgets.a display/libspdisplay.a helper/libspchelp.a libcroco/libcroco.a libnrtype/libnrtype.a libnr/libnr.a libavoid/libavoid.a livarot/libvarot.a ui/view/libuiview.a ui/libui.a ui/widget/libuiwidget.a graphlayout/libgraphlayout.a removeoverlap/libremoveoverlap.a libcola/libcola.a libvpsc/libvpsc.a extension/libextension.a extension/implementation/libimplementation.a extension/internal/libinternal.a extension/internal/libwpg/libwpg.a extension/script/libscript.a dom/libdom.a xml/libspxml.a util/libinkutil.a io/libio.a inkjar/libinkjar.a libinkpost.a debug/libinkdebug.a -pthread -L/usr/local/lib -L/usr/X11R6/lib -L/opt/gnome/lib -lgtkmm-2.4 -lgdkmm-2.4 -latkmm-1.6 -lpangomm-1.4 -lglibmm-2.4 -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgdk_pixbuf-2.0 -lpangocairo-1.0 -lpango-1.0 -lgobject-2.0 -lgmodule-2.0 -ldl -lxslt -lxml2 -lcairo -lfreetype -lfontconfig -lXrender -lX11 -lXext -lglitz -lsigc-2.0 -lgthread-2.0 -lglib-2.0 -lpng12 -lz -lm   -lpng -lz -lpopt   -L/usr/X11R6/lib -lXft -lXrender -lX11 -lXext -lfontconfig -lfreetype -lz   -L/usr/local/lib -lpangoft2-1.0 -lpango-1.0 -lgobject-2.0 -lgmodule-2.0 -ldl -lglib-2.0   -lfreetype -lz      -lssl -lcrypto -ldl   -lgc   -llcms
jabber_whiteboard/libjabber_whiteboard.a(inkboard-document.o): In function `InkboardSession':
./jabber_whiteboard/inkboard-session.h:38: undefined reference to `vtable for Inkscape::Whiteboard::InkboardSession'
./jabber_whiteboard/inkboard-session.h:38: undefined reference to `vtable for Inkscape::Whiteboard::InkboardSession'