[patch]: Fix multilib/non-multilib build for 4.6 for *-w64-mingw32

[Kai Tietz]

2010/5/2 Eric Botcazou <ebotcazou@adacore.com>:
>> And if so as you said, then the check for --enable-multilib is pretty
>> bogus here and the option disable-multilib is meaning-less as it
>> doesn't do anything.
>
> No, it does prevent the multilibs from being built.
>
> --
> Eric Botcazou
>

Right, beside the point that it uses the lib-confoguration provided by
multilib. This makes sense for targets which can easily use symbolic
links. But for win32 targets, which don't have symlink support in
general (beside cygwin), this isn't a good solution. The
standard-behavior of mingw32 (x86) and cygwin (x86) is, that libraries
are put into /lib. So what I meant here as bogus is, that this disable
option doesn't disable all multilib configuration, and this was the
hole-thing I am talking about.

Kai

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