http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57119
--- Comment #12 from Kai Tietz <ktietz at gcc dot gnu.org> 2013-04-30 13:49:25 UTC --- Hmm, I don't see in config.log any difference to the variant I have built on my box. Shared is actual enabled in you config.log for libstdc++-v3. So DLL should be built, if you don't have a build error. For me 32-bit and 64-bit w64 version builds OOTB without any issue. You are building multilib as I see, so do you have 32-bit and 64-bit setuped too? Could you check if there is for real no dll built by executing within your libstdc++-v3 build-directory the command 'find ./* -name "*.dll" -print'?
