anchor.diff:  :check_msvc
     POPD
     cl /? >NUL 2>NUL <NUL
  -  if !ERRORLEVEL! NEQ 0 (
  +  if %ERRORLEVEL% NEQ 0 (
       set "MSG=Can't detect Microsoft Visial Studio C++ compiler (cl.exe). MSVS 2015/2017 are supported only from standard locations"
       goto die
     )
  
positive.code: 
  :execute
    echo =================================================================================
    setlocal enableextensions disabledelayedexpansion
    echo %*
    call %*
    endlocal
  
negative.code: :: - MSVS 2015/2017
  :: (tools are searched on default paths or environment should be pre-configured)
  @echo off
  setlocal
  
  set SCRIPTDIR=%~dp0
  if NOT exist "%SCRIPTDIR%\..\..\build" (
  