feh compiles perfectly well without xinerama support. Instead of depending on xinerama it should respect the xinerama use flag.
# ldd `which feh` linux-gate.so.1 => (0xffffe000) libz.so.1 => /lib/libz.so.1 (0xb7efd000) libpng12.so.0 => /usr/lib/libpng12.so.0 (0xb7ed8000) libX11.so.6 => /usr/lib/libX11.so.6 (0xb7dea000) libImlib2.so.1 => /usr/lib/libImlib2.so.1 (0xb7d7d000) libfreetype.so.6 => /usr/lib/libfreetype.so.6 (0xb7d0d000) libXext.so.6 => /usr/lib/libXext.so.6 (0xb7cff000) libdl.so.2 => /lib/libdl.so.2 (0xb7cfa000) libm.so.6 => /lib/libm.so.6 (0xb7cd3000) libgiblib.so.1 => /usr/lib/libgiblib.so.1 (0xb7cca000) libjpeg.so.62 => /usr/lib/libjpeg.so.62 (0xb7caa000) libXinerama.so.1 => /usr/lib/libXinerama.so.1 (0xb7ca7000) libc.so.6 => /lib/libc.so.6 (0xb7b6a000) libXau.so.6 => /usr/lib/libXau.so.6 (0xb7b66000) libXdmcp.so.6 => /usr/lib/libXdmcp.so.6 (0xb7b61000) /lib/ld-linux.so.2 (0xb7f22000) Sorry, deps need to be deterministic. Feel free to reopen if you have a patch to make it respect the flag.
Created attachment 91176 [details, diff] patch to feh's configure.ac to add --disable-xinerama option +regen
Created attachment 91177 [details, diff] patch to media-gfx/feh-1.3.4 to add xinderama use flag
patch attached, reopeninig
fixed in cvs