Workaround for Qt 5.2.1 lack of keyboard entry on Linux from a ssh -X session from Mac XQuartz

As is well known (I think) – if you have a compiled Qt program (ours is on Qt 5.2.1) running on linux (ours is Centos 6.6) and a user uses XQuery from Mac OS X and does an ssh -X to the Linux machine, the Qt application runs with two errors: Error: Failed to compile xkb_symbols
Error: Failed to compile keymap

But no keyboard input is possible. QTBUG-32760 is most relevant.

This appears to be fixed in QT 5.3 (and beyond) if using certain configuration options. That's nice. However, for this legacy application I was wondering if back in the Qt 5.2.1. days if there was ANY sort of reasonable work around to get the keyboard to work until / when the application is re-compiled with QT 5.3?

Maybe setting some of the XKB_ envars first? If so, what's appropriate for a MAC keyboard? Even compiling a new Mac xkb type file or something first then using a xsetxkbmap or whatever?

Anyway, many of our users are getting frustrated by this ... so I was hoping there was a quick "fix" / workaround to solve their needs from paeglis who seems to know this stuff inside and out.

I did verify that this version of XQuery DOES support XKEYBOARD option, but that doesn't seem to help.