diff --git a/ldoc.lua b/ldoc.lua
index ac2a022..b92d919 100644
--- a/ldoc.lua
+++ b/ldoc.lua
@@ -1,3 +1,4 @@
+#!/usr/bin/env lua
 ---------------
 -- ## ldoc, a Lua documentation generator.
 --
@@ -26,7 +27,7 @@ app.require_here()
 
 --- @usage
 local usage = [[
-ldoc, a documentation generator for Lua, vs 1.1.0
+ldoc, a documentation generator for Lua, vs 1.2.0
   -d,--dir (default docs) output directory
   -o,--output  (default 'index') output name
   -v,--verbose          verbose
diff --git a/ldoc/builtin/globals.lua b/ldoc/builtin/globals.lua
index 7ccdf0e..06dbdd5 100644
--- a/ldoc/builtin/globals.lua
+++ b/ldoc/builtin/globals.lua
@@ -2,14 +2,13 @@
 -- global functions and tables
 local tools = require 'ldoc.tools'
 local globals = {}
+local lua52 = _VERSION:match '5.2'
 
 
 globals.functions = {
    assert = true,
    collectgarbage = true,
    dofile = true,
-   setfenv = true,
-   getfenv = true,
    getmetatable = true,
    setmetatable = true,
    pairs = true,
@@ -27,32 +26,54 @@ globals.functions = {
    tonumber = true,
    tostring = true,
    type = true,
-   unpack = true,
    xpcall = true,
    module = true,
    require = true,
 }
 local functions = globals.functions
 
-globals.tables = {
-   io = '5.7',
-   package = '5.3',
-   math = '5.6',
-   os = '5.8',
-   string = '5.4',
-   table = '5.5',
-   coroutine = '5.2',
-   debug = '5.9'
-}
-local tables = globals.tables
+if not lua52 then
+   functions.setfenv = true
+   functions.getfenv = true
+   functions.unpack = true
+else
+   functions.rawlen = true
+end
 
 local manual, fun_ref
 
 function globals.set_manual_url(url)
-    manual = url .. '#'
-    fun_ref = manual..'pdf-'
+   manual = url .. '#'
+   fun_ref = manual..'pdf-'
 end
-globals.set_manual_url 'http://www.lua.org/manual/5.1/manual.html'
+
+if lua52 then
+   globals.tables = {
+      io = '6.8',
+      package = '6.3',
+      math = '6.6',
+      os = '6.9',
+      string = '6.4',
+      table = '6.5',
+      coroutine = '6.2',
+      debug = '6.10'
+    }
+   globals.set_manual_url 'http://www.lua.org/manual/5.2/manual.html'
+else
+   globals.tables = {
+      io = '5.7',
+      package = '5.3',
+      math = '5.6',
+      os = '5.8',
+      string = '5.4',
+      table = '5.5',
+      coroutine = '5.2',
+      debug = '5.9'
+   }
+   globals.set_manual_url 'http://www.lua.org/manual/5.1/manual.html'
+end
+
+local tables = globals.tables
 
 local function function_ref (name)
    return {href = fun_ref..name, label = name}
diff --git a/ldoc/html/ldoc_ltp.lua b/ldoc/html/ldoc_ltp.lua
index 86b35c8..7e7e1db 100644
--- a/ldoc/html/ldoc_ltp.lua
+++ b/ldoc/html/ldoc_ltp.lua
@@ -212,7 +212,7 @@ return [==[
 </div> <!-- id="content" -->
 </div> <!-- id="main" -->
 <div id="about">
-<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.1</a></i>
+<i>generated by <a href="http://github.com/stevedonovan/LDoc">LDoc 1.2</a></i>
 </div> <!-- id="about" -->
 </div> <!-- id="container" -->
 </body>