anchor.diff:  
   mkdir out64dll
   xcopy /q /y /R .\out32dll\*.* .\out64dll\*.*
  -if %errorlevel% neq 0 exit /b %errorlevel%+if %errorlevel% neq 0 exit /b %errorlevel%
  +
  +rem -----------------------------------------------------------------------------
  +rem -- build paho 64 bits.
  +rem -----------------------------------------------------------------------------
  +
  +pushd %paho-build-root%
  +if exist "%programfiles(x86)%\MSBuild\14.0\\." (
  +msbuild ".\Windows Build\paho-mqtt3cs\paho-mqtt3cs.vcxproj" /p:Configuration=Debug;PlatformToolset=v140;Platform=x64
  +msbuild ".\Windows Build\paho-mqtt3cs\paho-mqtt3cs.vcxproj" /p:Configuration=Release;PlatformToolset=v140;Platform=x64
  +goto paho_build_done
  +)
  +if exist "%programfiles(x86)%\MSBuild\12.0\\." (
  +msbuild ".\Windows Build\paho-mqtt3cs\paho-mqtt3cs.vcxproj" /p:Configuration=Debug;Platform=x64
  +msbuild ".\Windows Build\paho-mqtt3cs\paho-mqtt3cs.vcxproj" /p:Configuration=Release;Platform=x64
  +goto paho_build_done
  +)
  +
  +@Echo Paho MQTT needs Visual Studio 2013 or higher in order to build.
  +exit /b 1
  +:paho_build_done
  +if not %errorlevel%==0 exit /b %errorlevel%
positive.code: rem -----------------------------------------------------------------------------
  set paho-root=%PAHO_PATH%
  set paho-repo=https://git.eclipse.org/r/paho/org.eclipse.paho.mqtt.c.git
  set package-root=%~dp0\..\packaging\windows
  set paho-build-root=%paho-root%\org.eclipse.paho.mqtt.c
  
  
negative.code: rem -----------------------------------------------------------------------------
  
  if Exist %paho-root% rmdir %paho-root% /s /q
  git clone -b %paho-branch% %paho-repo% %paho-build-root%
  if not %errorlevel%==0 exit /b %errorlevel%
  
  rem -----------------------------------------------------------------------------
  