[Bug libstdc++/100376] __gnu_cxx::stdio_filebuf does not work correctly on windows for GCC 12

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100376

--- Comment #2 from cqwrteur <unlvsur at live dot com> ---
(In reply to cqwrteur from comment #1)
> What thing very wierd is that the code runs correctly under wine but
> incorrect on windows, even it is the same program.
> 
> D:\hg\fast_io\.tmp\vdso>g++ -o test test.cc -Ofast -std=c++20 -s -flto
> -march=native -I../../include
> 
> D:\hg\fast_io\.tmp\vdso>test
> 3
> 0
> 
> D:\hg\fast_io\.tmp\vdso>g++ -o test test.cc -Ofast -std=c++20 -s -flto
> -march=native -I../../include -static
> 
> D:\hg\fast_io\.tmp\vdso>
> D:\hg\fast_io\.tmp\vdso>test
> 3
> 3
> 
> It looks this is an issue with libstdc++.dll's abi?? maybe I missed
> something here?

Oh. i understand what is happening here. I installed too many versions of
libstdc++.dll, they conflict with each other.

Does windows have a version checker for dlls like Linux does?