[Bug libstdc++/37522] [4.4 regression] Incorrect vswprintf prototype breaks __to_xstring

[k2k at narod dot ru]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37522

--- Comment #17 from Karlson2k <k2k at narod dot ru> 2013-03-05 01:28:06 UTC ---
Created attachment 29582
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29582
Proposed patch

Possible patch for latest MinGW-w64.
Patched GCC version: 4.7.2
Can be easy edited for trunk version.

--- ./libstdc++-v3/config/os/mingw32-w64/os_defines.h.orig    2011-12-23
21:23:38 +0400
+++ ./libstdc++-v3/config/os/mingw32-w64/os_defines.h    2013-03-05 05:22:07
+0400
@@ -64,7 +64,10 @@
 #define _GLIBCXX_HAVE_DOS_BASED_FILESYSTEM 1

 // See  libstdc++/37522.
+#include <_mingw_mac.h>
+#if !defined (__MINGW64_VERSION_MAJOR) || (__MINGW64_VERSION_MAJOR < 3)
 #define _GLIBCXX_HAVE_BROKEN_VSWPRINTF 1
+#endif

 // See libstdc++/43738
 // On native windows targets there is no ioctl function. And the existing