https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116159
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Martin Storsjö from comment #2) > (In reply to Jakub Jelinek from comment #1) > > Is mingw really using GNU symbol versioning? That ought to be an ELF only > > thing and this is guarded with #ifdef _GLIBCXX_SYMVER_GNU. > > It's not actually using GNU symbol versioning (indeed, that's an ELF > concept), but for some reason, a x86_64-w64-mingw32 build of libstdc++ do > end up with "#define _GLIBCXX_SYMVER_GNU 1". FWIW, this came up recently in PR123908. For mingw32-w64 the linker script doesn't do any symbol versioning, but it *does* affect symbol visibility. Symbols not exported from the script are not included in libstdc++.dll.a
