README: add a note about 64-bit Wine needing 32-bit Wine to work

[Dmitry Timoshkov]

Sebastian Lackner <sebastian at fds-team.de> wrote:

> >> +  http://wiki.winehq.org/Wine64 for details. Note that a 64-bit Wine
> >> +  build will not work without also building 32-bit Wine.
> > 
> > This statement is not true in general.
> > 
> > Actually 64-bit Wine build works just fine without any 32-bit part. That's
> > just a useless configuration, but it's a minor detail.
> > 
> 
> It depends on your definion of "works just fine". Various parts of wine contain
> hardcoded paths to 32-bit executables, which can't work in a pure 64-bit build.

By "works just fine" I mean that 64-bit Wine build is able to execute 64-bit
Windows applications and built-in Wine programs.

> programs/winemenubuilder/winemenubuilder.c:
>   fprintf(file, "Exec=env WINEPREFIX=\"%s\" wine %s %s\n",
> 
> tools/wineapploader.in
>   exec wine "$appname" "$@"

That's just a symlink to the launcher, and probably it should depend on
actual build.

> Not sure if there is a way to express it a bit better, but I think in general it
> probably wouldn't hurt to have this documented somewhere in the source tree.

Sure.

-- 
Dmitry.