http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51673
--- Comment #7 from Pawel Sikora <pluto at agmk dot net> 2011-12-28 19:51:55 UTC --- please apply following obvious patch: --- gcc-4.6.0/libstdc++-v3/config/abi/pre/gnu-versioned-namespace.ver.orig 2011-12-28 12:43:50.000000000 +0100 +++ gcc-4.6.0/libstdc++-v3/config/abi/pre/gnu-versioned-namespace.ver 2011-12-28 20:25:36.603040153 +0100 @@ -42,9 +42,9 @@ __once_proxy; # operator new(size_t) - _Znw[jm]; + _Znw[jmy]; # operator new(size_t, std::nothrow_t const&) - _Znw[jm]RKSt9nothrow_t; + _Znw[jmy]RKSt9nothrow_t; # operator delete(void*) _ZdlPv; @@ -52,9 +52,9 @@ _ZdlPvRKSt9nothrow_t; # operator new[](size_t) - _Zna[jm]; + _Zna[jmy]; # operator new[](size_t, std::nothrow_t const&) - _Zna[jm]RKSt9nothrow_t; + _Zna[jmy]RKSt9nothrow_t; # operator delete[](void*) _ZdaPv; it fixes new/delete exports for x86_64-pc-mingw32. mt-allocator needs more exports...