in `cmd`, `vcvarslol.bat >> vcvarslol`, then vs2019 tools can be pulled into msys2 with `. vcvarslol`

vcvarslol.bat

@ECHO OFF

set OLDPATH=%PATH%

call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" x64 > NUL:

echo #!/bin/bash

echo export INCLUDE='%INCLUDE%'
echo export LIB='%LIB%'
echo export LIBPATH='%LIBPATH%'

call set NEWPATH=%%PATH:%OLDPATH%=%%
set NEWPATH=%NEWPATH:C:=/c%
set NEWPATH=%NEWPATH:\=/%
set NEWPATH=%NEWPATH:;=:%
echo export PATH="%NEWPATH%:$PATH"