{-# OPTIONS -fno-warn-incomplete-patterns -optc-DNON_POSIX_SOURCE #-}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
-----------------------------------------------------------------------------
--
-- GHC Driver program
-- to find out what version of GHC it's using before package.conf
-- exists, so starting the session fails.
case cli_mode of
+ ShowInfo -> do showInfo
+ exitWith ExitSuccess
ShowSupportedLanguages -> do showSupportedLanguages
exitWith ExitSuccess
ShowVersion -> do showVersion
data CmdLineMode
= ShowUsage -- ghc -?
| PrintLibdir -- ghc --print-libdir
+ | ShowInfo -- ghc --info
| ShowSupportedLanguages -- ghc --supported-languages
| ShowVersion -- ghc -V/--version
| ShowNumVersion -- ghc --numeric-version
mode_flags :: [(String, OptKind (CmdLineP (CmdLineMode, String, [String])))]
mode_flags =
[ ------- help / version ----------------------------------------------
- ( "?" , PassFlag (setMode ShowUsage))
- , ( "-help" , PassFlag (setMode ShowUsage))
- , ( "-print-libdir" , PassFlag (setMode PrintLibdir))
- , ( "V" , PassFlag (setMode ShowVersion))
- , ( "-version" , PassFlag (setMode ShowVersion))
- , ( "-numeric-version", PassFlag (setMode ShowNumVersion))
+ ( "?" , PassFlag (setMode ShowUsage))
+ , ( "-help" , PassFlag (setMode ShowUsage))
+ , ( "-print-libdir" , PassFlag (setMode PrintLibdir))
+ , ( "V" , PassFlag (setMode ShowVersion))
+ , ( "-version" , PassFlag (setMode ShowVersion))
+ , ( "-numeric-version" , PassFlag (setMode ShowNumVersion))
+ , ( "-info" , PassFlag (setMode ShowInfo))
, ( "-supported-languages", PassFlag (setMode ShowSupportedLanguages))
------- interfaces ----------------------------------------------------
hPutStr stderr " booted by GHC version "
hPutStrLn stderr cBooterVersion
+-- We print out a Read-friendly string, but a prettier one than the
+-- Show instance gives us
+showInfo :: IO ()
+showInfo = do
+ let sq x = " [" ++ x ++ "\n ]"
+ putStrLn $ sq $ concat $ intersperse "\n ," $ map show compilerInfo
+ exitWith ExitSuccess
+
showSupportedLanguages :: IO ()
showSupportedLanguages = do mapM_ putStrLn supportedLanguages
exitWith ExitSuccess