unison-2.48 build fails with latest ocaml and flexdll (ping: Yaakov, Damien)

[Andrew Schulman]

> I'm trying to build unison 2.48.3, which worked fine the last time I tried
> it, in June 2015.  Today the build fails, with "flexdll error: cannot
> relocate":
> 
> >>> Compiling unison2.48-2.48.3-2.x86_64
> ocamlc -o mkProjectInfo unix.cma str.cma mkProjectInfo.ml
> File "mkProjectInfo.ml", line 1:
> Error: Error on dynamically loaded library:
> /usr/lib/ocaml/stublibs/dllunix.so: flexdll error: cannot relocate
> RELOC_REL32, target is too far: 0xfffffffc0f997112  0xf997112
> 
> I ran /bin/rebaseall and tried again, with the same result.

This is still unresolved. I can't build unison-2.48.3 on any of my Cygwin
hosts. It worked a year ago; now it doesn't. Can you help? 

Thanks,
Andrew