Cannot build graphviz with no_x11

[alpha@…]

When building graphviz with the no_x11 variant enabled the build fails when trying to link libXpm and libX11. See below.

/usr/bin/gcc-4.0 -dynamiclib ${wl}-undefined ${wl}dynamic_lookup -o .libs/libgvplugin_gd.6.0.0.dylib .libs/gvplugin_gd.o .libs/gvrender_gd.o .libs/gvrender_gd_vrml.o .libs/gvtextlayout_gd.o .libs/gvloadimage_gd.o .libs/gvdevice_gd.o -L/opt/local/lib ../../lib/gvc/.libs/libgvc.dylib /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_graphviz/work/graphviz-2.22.2/lib/graph/.libs/libgraph.dylib /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_graphviz/work/graphviz-2.22.2/lib/cdt/.libs/libcdt.dylib /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_graphviz/work/graphviz-2.22.2/lib/pathplan/.libs/libpathplan.dylib /opt/local/lib/libexpat.dylib /opt/local/lib/libz.dylib ../../lib/graph/.libs/libgraph.dylib ../../lib/cdt/.libs/libcdt.dylib -lXpm -lX11 /opt/local/lib/libjpeg.dylib /opt/local/lib/libfontconfig.dylib /opt/local/lib/libfreetype.dylib /opt/local/lib/libpng12.dylib -lz /opt/local/lib/libiconv.dylib -lm -install_name /opt/local/lib/graphviz/libgvplugin_gd.6.dylib -compatibility_version 7 -current_version 7.0/usr/bin/libtool: can't locate file for: -lXpm/usr/bin/libtool: file: -lXpm is not an object file (not allowed in a library)/usr/bin/libtool: can't locate file for: -lX11/usr/bin/libtool: file: -lX11 is not an object file (not allowed in a library)make[3]: * [libgvplugin_gd.la] Error 1make[2]: * [all-recursive] Error 1make[1]: * [all-recursive] Error 1make: * [all] Error 2