anchor.diff:  /MW            Use mingw as build system instead of MSVC
   
   Other options:
  -/CONFIG [dir]  Location where the config file should be installed.
  -               Default is %PROGRAMDATA%\LuaRocks
   /FORCECONFIG   Use a single config location. Do not use the
                  LUAROCKS_CONFIG variable or the user's home directory.
                  Useful to avoid conflicts when LuaRocks
                  is embedded within an application.
   /F             Remove installation directory if it already exists.
  -/R             Load registry information to register '.rockspec'
  +/NOREG         Do not load registry info to register '.rockspec'
                  extension with LuaRocks commands (right-click).
   /NOADMIN       The installer requires admin priviledges. If not
                  available it will elevate a new process. Use this
  
positive.code:     vars.UNAME_M = get_architecture()  -- can only do when installation was found
  end
  
  print(S[[
  
  Will configure LuaRocks with the following paths:
  LuaRocks       : $FULL_PREFIX
  Lua interpreter: $LUA_BINDIR\$LUA_INTERPRETER
      binaries   : $LUA_BINDIR
      libraries  : $LUA_LIBDIR
      includes   : $LUA_INCDIR
  Binaries will be linked against: $LUA_LIBNAME with runtime $LUA_RUNTIME
  System architecture detected as: $UNAME_M
  
  ]])
  
negative.code: 	print("Admin priviledges available for installing")
  end
  
  vars.PREFIX = vars.PREFIX or os.getenv("PROGRAMFILES")..[[\LuaRocks]]
  vars.FULL_PREFIX = S"$PREFIX\\$VERSION"
  vars.BINDIR = vars.FULL_PREFIX
  vars.LIBDIR = vars.FULL_PREFIX
  