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From: "ktietz at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug libstdc++/37522] [4.4 regression] Incorrect vswprintf prototype breaks __to_xstring
Date: Sat, 19 Jan 2013 11:38:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37522

Kai Tietz <ktietz at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |ktietz at gcc dot gnu.org

--- Comment #11 from Kai Tietz <ktietz at gcc dot gnu.org> 2013-01-19 11:38:12 UTC ---
(In reply to comment #10)
> Hello,
> 
> I know this bug is fixed since a long time, but there is the same problem when
> trying to compile the gcc-4.8-20130106.tar.bz2 tarball for mingw-w64.
> 
> Same prolems having, usually same issues, adding the line
> 
> // See  libstdc++/37522.
> #define _GLIBCXX_HAVE_BROKEN_VSWPRINTF 1
> in the libstdc++-v3/config/os/mingw32-w64/os_defines.h file seems to allow the
> build.
> 
> Should i open a new bug, or can you take it in acount from here?

Don't open an new bug, don't reopen this bug.  I assume you are using
none-trunk version of mingw-w64, are you?  If so, please switch to
trunk-version.