64bit version of libstdc++-6.dll missing

niXman i.nixman@gmail.com
Fri Jul 6 13:39:00 GMT 2012

2012/7/6 Christer Solskogen:
> Hi!
> I've just built a multilib capable gcc (both 4.6.3 and 4.7.1 to see if there
> was any difference) using a mingw-w64 cross-compiler. GCC compiles and works
> great on Windows, but there seems to be a problem with libstdc++-6.dll.
> There is only one version of libstdc++-6.dll installed, and that one is a 32bit
> one, which I find stange.
> In the gcc-build directory there exists two versions libstdc++-6.dll:
> ./x86_64-w64-mingw32/libstdc++-v3/src/.libs/libstdc++-6.dll
> ./x86_64-w64-mingw32/32/libstdc++-v3/src/.libs/libstdc++-6.dll
> I suspect that both of them gets installed, but that they are installed in the
> same directory and that they overwrite eachother.

This is a known problem.
I wrote scripts for building multilib-MinGW for i686 and x86_64 architectures:

Also, I build multilib-MinGW:

Dual-target(32 & 64 bit) MinGW compilers for 32 and 64 bit Windows:

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