[x86_64] x86_64-w64-mingw32 compiler issue with wxWidgets

[Frédéric Bron <frederic dot bron at m4x dot org>]

I have used x86_64-w64-mingw32-g++ (4.8.1) cross compiler from
cygwin64 to build wxWidgets (2.9.5 with some patches). When I link to
my project, I get a lot of errors like:
/usr/x86_64-w64-mingw32/sys-root/mingw/lib/../lib/libuuid.a(lib64_libuuid_a-uuid.o):uuid.c:(.rdata+0x0):
multiple definition of `FOLDERID_Windows'
/cygdrive/c/Softs/mingw64-4.8.1-c++98-release/wx/lib/libwx_mswu_core-2.9-x86_64-w64-mingw32.a(corelib_msw_textentry.o):textentry.cpp:(.rdata$FOLDERID_Windows[FOLDERID_Windows]+0x0)>

This has already been reported:
http://lists.gnu.org/archive/html/mingw-cross-env-list/2013-04/msg00006.html
http://forums.wxwidgets.org/viewtopic.php?f=19&t=37278

The strange thing here is that I have also built a
x86_64-w64-mingw32-g++ cross compiler on linux and it works perfectly
well.
Could somebody give me the scripts used to build the cygwin cross
compiler so that I can compare with mines and try to figure out where
the differences come from?

Regards,

Frédéric

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