anchor.diff:  
   cd build
   
  +cmake -G "%VS_VERSION%" -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DCMAKE_INSTALL_PREFIX=%QL_DIR% -DMSVC_RUNTIME=%MSVC_RUNTIME% --target install ..
   
  -if %ADDRESS_MODEL%==Win64 (
  -  cmake -G "%VS_VERSION% %ADDRESS_MODEL%" -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DCMAKE_INSTALL_PREFIX=%QL_DIR% -DMSVC_RUNTIME=%MSVC_RUNTIME% --target install ..
  -) else (
  -  cmake -G "%VS_VERSION%" -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DCMAKE_INSTALL_PREFIX=%QL_DIR% -DMSVC_RUNTIME=%MSVC_RUNTIME% --target install ..
  -)
   
   if %errorlevel% neq 0 exit /b 1
   
  
positive.code: )
  
  cd build
  
  if %ADDRESS_MODEL%==Win64 (
    cmake -G "%VS_VERSION% %ADDRESS_MODEL%" -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DCMAKE_INSTALL_PREFIX=%QLEXT_DIR% -DMSVC_RUNTIME=%MSVC_RUNTIME% --target install ..
  ) else (
    cmake -G "%VS_VERSION%" -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DCMAKE_INSTALL_PREFIX=%QLEXT_DIR% -DMSVC_RUNTIME=%MSVC_RUNTIME% --target install ..
  )
  
  if %errorlevel% neq 0 exit /b 1
  
  
negative.code: @echo off
  
  set BOOST_ROOT=D:/dev/boost_1_74_0
  set BOOST_LIBRARYDIR=D:/dev/boost_1_74_0/lib64-msvc-14.2
  set INCLUDE=%BOOST_ROOT%;C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include
  set QL_DIR=%CD%\QuantLib
  set QLEXT_DIR=%CD%\QuantLib-Ext
  set BUILD_TYPE=Release
  set ADDRESS_MODEL=Win64
  set MSVC_RUNTIME=dynamic
  set VS_VERSION=Visual Studio 16 2019
  
  cd QuantLib
  
  