anchor.diff:     ECHO                Default is TREE/bin.
      ECHO.
      ECHO /L             Install LuaRocks' own copy of Lua even if detected.
  +   ECHO                (/LUA, /INC, /LIB, /BIN will be ignored when used 
  +   ECHO                with /L^)
      ECHO /LUA [dir]     Location where Lua is installed - e.g. c:\lua\5.1\
      ECHO /INC [dir]     Location of Lua includes - e.g. c:\lua\5.1\include
      ECHO /LIB [dir]     Location of Lua libraries -e.g. c:\lua\5.1\lib
  
positive.code:             SET LUA_INTERPRETER=luajit.exe
              GOTO INTERPRETER_IS_SET
           )		 
           ECHO Lua executable lua.exe or lua5.1.exe not found in %LUA_BINDIR%
           GOTO ERROR
        )
        SET CURR=%%L
  
negative.code:    ECHO Installs LuaRocks.
     ECHO.
     ECHO /P [dir]       Where to install.
     ECHO                Default is %PREFIX% (version; %VERSION%, will be
     ECHO                appended to this path^)
     ECHO /CONFIG [dir]  Location where the config file should be installed.
     ECHO                Default is same place of installation
     ECHO /TREE [dir]    Root of the local tree of installed rocks.
  