I purged some packages, then cave fix-linkage found xdpyinfo broken, missing libXxf86dga.so.1. libXxf86dga was removed before.
Ok, it's just partly correct. xdpyinfo has the "dga"-USE-Flag, which will pull in libXxf86dga. But I have disabled it. So in order to be sure I rechecked: install libXxf86dga, then install xdpyinfo USE="-dga -dmx -xinerama", uninstall libXxf86dga: $ xdpyinfo xdpyinfo: error while loading shared libraries: libXxf86dga.so.1: cannot open shared object file: No such file or directory
I cannot reproduce. With x11-libs/libXxf86dga installed, USE=-dga xdpyinfo does not produce a binary linking with libXxf86dga.