[Bug libstdc++/108027] mcf thread model causes build issues for multilibs of x86_64-w64-mingw32 target

[unlvsur at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108027

--- Comment #2 from cqwrteur <unlvsur at live dot com> ---
(In reply to LIU Hao from comment #1)
> I need some information about this though:
> 
> 
> When multilib is enabled, does GCC still link programs with `-lmsvcrt`?
> There seems to be only reference to msvcrt:
> 
>   gcc/config/i386/mingw32.h:187:   -lmoldname -lmingwex -lmsvcrt -lkernel32
> " MCFGTHREAD_SPEC
> 
> which is followed by `MCFGTHREAD_SPEC`.
> 
> 
> If GCC links against libmcfgthread in both m32 and m64, then I suspect there
> is only one issue: You forgot to install mcfgthread. I don't know whether
> libtool has builtin macros for multilib builds; by default libraries are
> installed into `<prefix>/lib` and you have to copy them into
> `<prefix>/lib32` and `<prefix>/lib64`, respectively.

I do install mcfgthread. Yes. I do both of them. The problem is that libtool
will incorrectly link to lib/libmcfgthread.la even lib32/libmcfgthread.la and
lib/32/libmcfgthread.la exist.
Can you just remove the .la file?