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https://bugzilla.redhat.com/show_bug.cgi?id=489100
--- Comment #4 from Wolfgang Glas wolfgang.glas@ev-i.at 2009-03-07 11:24:02 EDT --- According to my experience with mingw-w64, which is gcc-4.4 based, this DLL is referenced by all my C++ DLLs compiled with mingw-w64 and to my knowledge this DLL is the key to cross-DLL exception handling. (contains some _Unwind_* export functions...)
Since I'm not a specialist in this area you might ask the mingw-w64 people for further explanations, since these guys seem to be the driving force behind the gcc-4.4/mingw integration.