anchor.diff:  REM //---------- if cmake doesn't exist then install it ----------
   WHERE cmake >nul 2>nul
   IF %ERRORLEVEL% NEQ 0 (
  +    echo Cmake does not exist yet...
       call :installcmake
  +) ELSE (
  +    echo Cmake found.
   )
  +:aftercmakecheck
  +
  +REM //---------- if BOOST doesn't exist then download it ----------
  +IF "%BOOST_ROOT%"=="" (
  +    ECHO Boost could not be found in BOOST_ROOT, so Boost 1.6.5 will be installed...
  +    call :installboost
  +) ELSE (
  +    ECHO Boost found in %BOOST_ROOT%
  +)
  +:afterboostcheck
   
   REM //---------- compile airsim_ros_interface that we got from git submodule ----------
  +:regular_build_pipeline
  +echo Starting Build
   IF NOT EXIST build mkdir build
   cd build
   goto :downloadzeromqsrc
  
positive.code: 
  :cmakefailed
  echo CMake install failed, please install cmake manually from https://cmake.org/
  exit 1
  
  :eof_own
  
negative.code: cd %ROOT_DIR%\build
  if exist "include/flatbuffers_src/flatbuffers/base.h" goto :prebuildstep6
  echo Downloading Flatbuffers 1.8.0
  REM //%ROOT_DIR%\..\tools\HttpGet "https://github.com/google/flatbuffers/archive/v1.8.0.tar.gz"
  powershell -ExecutionPolicy Unrestricted -file "%ROOT_DIR%\..\tools\http_get_powershell.ps1" -url_download "https://github.com/google/flatbuffers/archive/v1.8.0.tar.gz"
  if ERRORLEVEL 1 goto :buildfailed
  echo Decompressing v1.8.0.tar.gz
  %ROOT_DIR%\..\tools\TarTool "v1.8.0.tar.gz" ./
  