diff -r b518458f83e6 -r 7fcbbd46704a tools/pas2c/Main.hs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/pas2c/Main.hs	Mon Nov 05 01:35:54 2012 +0100
@@ -0,0 +1,43 @@
+module Main( main ) where
+
+import System( getArgs )
+import System.Console.GetOpt
+import System.Environment
+import System.Exit
+import System.IO
+import Data.Maybe( fromMaybe )
+import Pas2C
+
+main = do
+    args <- getArgs
+    if length args == 0
+    then do
+        name <- getProgName
+        hPutStrLn stderr $ usageInfo header options
+        exitFailure
+    else do
+        case getOpt RequireOrder options args of
+          (flags, [],      [])     ->
+            if length args == 8 then do
+                pas2C (args !! 1) ((args !! 3)++"/") ((args !! 5)++"/") ((args !! 7)++"/")
+            else do
+                if length args == 6 then do
+                    pas2C (args !! 1) ((args !! 3)++"/") ((args !! 5)++"/") "./"
+                else do
+                    error $ usageInfo header options
+          (_,     nonOpts, [])     -> error $ "unrecognized arguments: " ++ unwords nonOpts
+          (_,     _,       msgs)   -> error $ usageInfo header options
+    where header = "Freepascal to C conversion! Please use -n -i -o -a options in this order.\n"
+
+
+data Flag = HelpMessage | Name String | Input String | Output String | Alternate String
+
+options :: [OptDescr Flag]
+options = [
+    Option ['h'] ["help"]      (NoArg HelpMessage)      "print this help message",
+    Option ['n'] ["name"]      (ReqArg Name "MAIN")     "name of the main Pascal module",
+    Option ['i'] ["input"]     (ReqArg Input "DIR")     "input directory, where .pas files will be read",
+    Option ['o'] ["output"]    (ReqArg Output "DIR")    "output directory, where .c/.h files will be written",
+    Option ['a'] ["alternate"] (ReqArg Alternate "DIR") "alternate input directory, for out of source builds"
+  ]
+