Unfortunately I don't have all the deps for zView (they would need to be recompiled by the new compiler anyway) so I could try mxPlay only:
aout: 249 708 bytes
elf after the tos conversion: 232 908 bytes
zView numbers:
aout: 1 768 777
elf after the tos conversion: 1 752 298
zView links in zlib, freetype2, ldg, windom1, xpdf (c++) and is itself in c++. Is 16 KB worth the effort of having two compiler sets? Hardly.
Btw, Jo, don't be so afraid of the zView build :) I managed to get it done on clean machine in 10 minutes, it's really only about installing the libs mentioned above.