+ Joachim Beckers <joachim.beckers@gmail.com>:
/usr/bin/gcc-4.0 -o .libs/libgstximagesink.so -bundle .libs/libgstximagesink_la-ximagesink.o .libs/libgstximagesink_la-ximage.o -L/opt/local/lib ../../gst-libs/gst/interfaces/.libs/libgstinterfaces-0.10.dylib /opt/local/lib/libz.dylib ../../gst-libs/gst/video/.libs/libgstvideo-0.10.dylib /opt/local/lib/libgstbase-0.10.dylib /opt/local/lib/libgstreamer-0.10.dylib /opt/local/lib/libgobject-2.0.dylib /opt/local/lib/libgmodule-2.0.dylib /opt/local/lib/libgthread-2.0.dylib /opt/local/lib/libxml2.dylib -lpthread -lz -lm /opt/local/lib/libglib-2.0.dylib /opt/local/lib/libintl.dylib /opt/local/lib/libiconv.dylib -lX11
What is conspicuously missing here is a -L/usr/X11/lib flag ...
ld: library not found for -lX11
... so this comes as no surprise. As to why that flag is missing, I don't know. If no one here knows, you may need to ask on some macports list. - Harald