Linker undefined reference error, fresh MinGW install

I'm wondering if anyone has more information or knows what the issue is
here.  I am using a fresh MinGW install with GCC 9.2.0 on Windows 10.

```
C:\Users\dash\repos\link-bug>g++ --version
g++ (MinGW.org GCC Build-20200227-1) 9.2.0
Copyright (C) 2019 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
```

The following minimal example causes a linker undefined error with g++/ld.

```c++
#include <iostream>
#include <string>
using namespace std;

int main(int argc, char* argv[])
{
  cout << to_string(42) << endl;
  return 0;
}
```

```
C:\Users\dash\repos\link-bug>g++ main.cpp -o main
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../../mingw32/bin/ld.exe:
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../libmingw32.a(mbrscan.o):(.text+0xb6):
undefined reference to `SetLastError@4'
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../../mingw32/bin/ld.exe:
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../libmingw32.a(wcharmap.o):(.text+0x208):
undefined reference to `WideCharToMultiByte@32'
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../../mingw32/bin/ld.exe:
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../libmingwex.a(codeset.o):(.text+0xbe):
undefined reference to `GetCPInfo@8'
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../../mingw32/bin/ld.exe:
c:/mingw/bin/../lib/gcc/mingw32/9.2.0/../../../libmingwex.a(codeset.o):(.text+0x143):
undefined reference to `GetCPInfo@8'
collect2.exe: error: ld returned 1 exit status
```

Any ideas?  That should of course link without needing to specify any
additional libraries for linking.  The minimal example works fine on Gnu
GCC 9.3.0 on linux and on MacOS.

Derek
--
  Derek Harter, Ph.D., Associate Professor
  Computer Science and Information Systems (SCI 355)
  Texas A&M University
  PO Box 3011
  Commerce, TX 75429
  Tel: (903) 468-8762 / Fax: (903) 886-5404
  Email: [email protected]
  URL: http://harter.pro
  PGP Public Key:
       http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x613BC988DE797012
    - 3, 2, 1, Lets Jam!

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