GHC 7.4 is now required for building HEAD

compiler/cmm/Cmm.hs

 -- Cmm representations using Hoopl's Graph CmmNode e x.
 {-# LANGUAGE GADTs #-}
 {-# OPTIONS_GHC -fno-warn-warnings-deprecations #-}
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#if __GLASGOW_HASKELL__ >= 703
--- GHC 7.0.1 improved incomplete pattern warnings with GADTs
-{-# OPTIONS_GHC -fwarn-incomplete-patterns #-}
-#endif
 
 module Cmm (
      -- * Cmm top-level datatypes

compiler/cmm/CmmBuildInfoTables.hs

@@ -48,11 +48,7 @@ import qualified Data.Set as Set
 import Control.Monad
 
 foldSet :: (a -> b -> b) -> b -> Set a -> b
-#if __GLASGOW_HASKELL__ < 704
-foldSet = Set.fold
-#else
 foldSet = Set.foldr
-#endif
 
 ----------------------------------------------------------------
 -- Building InfoTables

compiler/cmm/CmmLayoutStack.hs

 {-# LANGUAGE RecordWildCards, GADTs #-}
-#if __GLASGOW_HASKELL__ < 701
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#endif
 module CmmLayoutStack (
        cmmLayoutStack, setInfoTableStackMap
   ) where

compiler/cmm/CmmLint.hs

@@ -6,9 +6,6 @@
 --
 -----------------------------------------------------------------------------
 {-# LANGUAGE GADTs #-}
-#if __GLASGOW_HASKELL__ < 701
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#endif
 module CmmLint (
     cmmLint, cmmLintGraph
   ) where

compiler/cmm/CmmNode.hs

@@ -8,12 +8,6 @@
 --     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#TabsvsSpaces
 -- for details
 
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#if __GLASGOW_HASKELL__ >= 703
--- GHC 7.0.1 improved incomplete pattern warnings with GADTs
-{-# OPTIONS_GHC -fwarn-incomplete-patterns #-}
-#endif
-
 module CmmNode (
      CmmNode(..), ForeignHint(..), CmmFormal, CmmActual,
      UpdFrameOffset, Convention(..), ForeignConvention(..), ForeignTarget(..),

compiler/cmm/CmmProcPoint.hs

 {-# LANGUAGE GADTs, DisambiguateRecordFields #-}
 {-# OPTIONS_GHC -fno-warn-warnings-deprecations #-}
-#if __GLASGOW_HASKELL__ < 701
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#endif
 
 module CmmProcPoint
     ( ProcPointSet, Status(..)

compiler/cmm/CmmUtils.hs

@@ -8,11 +8,6 @@
 
 {-# OPTIONS_GHC -fno-warn-deprecations #-}
 -- Warnings from deprecated blockToNodeList
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#if __GLASGOW_HASKELL__ >= 703
--- GHC 7.0.1 improved incomplete pattern warnings with GADTs
-{-# OPTIONS_GHC -fwarn-incomplete-patterns #-}
-#endif
 
 
 -----------------------------------------------------------------------------

compiler/cmm/Hoopl.hs

-#if __GLASGOW_HASKELL__ < 701
-{-# OPTIONS_GHC -fno-warn-duplicate-exports #-}
-#endif
 module Hoopl (
     module Compiler.Hoopl,
     module Hoopl.Dataflow,

compiler/cmm/Hoopl/Dataflow.hs

@@ -10,15 +10,8 @@
 --
 
 {-# LANGUAGE RankNTypes, ScopedTypeVariables, GADTs, EmptyDataDecls, PatternGuards, TypeFamilies, MultiParamTypeClasses #-}
-#if __GLASGOW_HASKELL__ >= 703
 {-# OPTIONS_GHC -fprof-auto-top #-}
-#endif
-#if __GLASGOW_HASKELL__ >= 701
 {-# LANGUAGE Trustworthy #-}
-#endif
-#if __GLASGOW_HASKELL__ < 701
-{-# OPTIONS_GHC -fno-warn-incomplete-patterns #-}
-#endif
 
 module Hoopl.Dataflow
   ( DataflowLattice(..), OldFact(..), NewFact(..), Fact, mkFactBase

compiler/cmm/PprC.hs

@@ -51,12 +51,8 @@ import Data.Word
 import System.IO
 import qualified Data.Map as Map
 
-#if __GLASGOW_HASKELL__ >= 703
 import Data.Array.Unsafe ( castSTUArray )
 import Data.Array.ST hiding ( castSTUArray )
-#else
-import Data.Array.ST
-#endif
 
 -- --------------------------------------------------------------------------
 -- Top level

compiler/coreSyn/CoreLint.lhs

@@ -14,9 +14,7 @@ A ``lint'' pass to check for Core correctness
 --     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#TabsvsSpaces
 -- for details
 
-#if __GLASGOW_HASKELL__ >= 704
 {-# OPTIONS_GHC -fprof-auto #-}
-#endif
 
 module CoreLint ( lintCoreBindings, lintUnfolding ) where
 

compiler/ghc.cabal.in

@@ -100,7 +100,6 @@ Library
 
     c-sources:
         parser/cutils.c
-        utils/md5.c
 
     if flag(dynlibs)
         c-sources:

compiler/main/InteractiveEval.hs

@@ -76,11 +76,7 @@ import Data.Dynamic
 import Data.Either
 import Data.List (find)
 import Control.Monad
-#if __GLASGOW_HASKELL__ >= 701
 import Foreign.Safe
-#else
-import Foreign hiding (unsafePerformIO)
-#endif
 import Foreign.C
 import GHC.Exts
 import Data.Array

compiler/main/SysTools.lhs

@@ -596,7 +596,6 @@ copyWithHeader dflags purpose maybe_header from to = do
   hClose hout
   hClose hin
  where
-#if __GLASGOW_HASKELL__ >= 702
   -- write the header string in UTF-8.  The header is something like
   --   {-# LINE "foo.hs" #-}
   -- and we want to make sure a Unicode filename isn't mangled.
@@ -604,9 +603,6 @@ copyWithHeader dflags purpose maybe_header from to = do
    hSetEncoding h utf8
    hPutStr h str
    hSetBinaryMode h True
-#else
-  header h str = hPutStr h str
-#endif
 
 -- | read the contents of the named section in an ELF object as a
 -- String.
@@ -782,11 +778,7 @@ runSomethingWith
 
 runSomethingWith dflags phase_name pgm args io = do
   let real_args = filter notNull (map showOpt args)
-#if __GLASGOW_HASKELL__ >= 701
       cmdLine = showCommandForUser pgm real_args
-#else
-      cmdLine = unwords (pgm:real_args)
-#endif
   traceCmd dflags phase_name cmdLine $ handleProc pgm phase_name $ io real_args
 
 handleProc :: String -> String -> IO (ExitCode, r) -> IO r

compiler/nativeGen/PprBase.hs

@@ -22,13 +22,8 @@ module PprBase (
 
 where
 
--- castSTUArray has moved to Data.Array.Unsafe
-#if __GLASGOW_HASKELL__ >= 703
 import Data.Array.Unsafe( castSTUArray )
 import Data.Array.ST hiding( castSTUArray )
-#else
-import Data.Array.ST
-#endif
 
 import Control.Monad.ST
 

compiler/utils/Binary.hs

@@ -78,9 +78,7 @@ import Data.IORef
 import Data.Char                ( ord, chr )
 import Data.Time
 import Data.Typeable
-#if __GLASGOW_HASKELL__ >= 701
 import Data.Typeable.Internal
-#endif
 import Control.Monad            ( when )
 import System.IO as IO
 import System.IO.Unsafe         ( unsafeInterleaveIO )
@@ -604,22 +602,12 @@ instance Binary (Bin a) where
 -- -----------------------------------------------------------------------------
 -- Instances for Data.Typeable stuff
 
-#if __GLASGOW_HASKELL__ >= 701
 instance Binary TyCon where
     put_ bh (TyCon _ p m n) = do
         put_ bh (p,m,n)
     get bh = do
         (p,m,n) <- get bh
         return (mkTyCon3 p m n)
-#else
-instance Binary TyCon where
-    put_ bh ty_con = do
-        let s = tyConString ty_con
-        put_ bh s
-    get bh = do
-        s <- get bh
-        return (mkTyCon s)
-#endif
 
 instance Binary TypeRep where
     put_ bh type_rep = do

compiler/utils/FastString.lhs

@@ -119,11 +119,7 @@ import Data.Char
 
 import GHC.IO           ( IO(..) )
 
-#if __GLASGOW_HASKELL__ >= 701
 import Foreign.Safe
-#else
-import Foreign hiding ( unsafePerformIO )
-#endif
 
 #if defined(__GLASGOW_HASKELL__)
 import GHC.Base         ( unpackCString# )

compiler/utils/Fingerprint.hsc

@@ -24,71 +24,7 @@ import Outputable
 import Text.Printf
 import Numeric          ( readHex )
 
-##if __GLASGOW_HASKELL__ >= 701
--- The MD5 implementation is now in base, to support Typeable
 import GHC.Fingerprint
-##endif
-
-##if __GLASGOW_HASKELL__ < 701
-import Data.Char
-import Foreign
-import Foreign.C
-import GHC.IO (unsafeDupablePerformIO)
-
--- Using 128-bit MD5 fingerprints for now.
-
-data Fingerprint = Fingerprint {-# UNPACK #-} !Word64 {-# UNPACK #-} !Word64
-  deriving (Eq, Ord)
-        -- or ByteString?
-
-fingerprint0 :: Fingerprint
-fingerprint0 = Fingerprint 0 0
-
-peekFingerprint :: Ptr Word8 -> IO Fingerprint
-peekFingerprint p = do
-      let peekW64 :: Ptr Word8 -> Int -> Word64 -> IO Word64
-          STRICT3(peekW64)
-          peekW64 _ 0 i = return i
-          peekW64 p n i = do 
-                w8 <- peek p
-                peekW64 (p `plusPtr` 1) (n-1) 
-                    ((i `shiftL` 8) .|. fromIntegral w8)
-
-      high <- peekW64 p 8 0
-      low  <- peekW64 (p `plusPtr` 8) 8 0
-      return (Fingerprint high low)
-
-fingerprintData :: Ptr Word8 -> Int -> IO Fingerprint
-fingerprintData buf len = do
-  allocaBytes (#const sizeof(struct MD5Context)) $ \pctxt -> do
-    c_MD5Init pctxt
-    c_MD5Update pctxt buf (fromIntegral len)
-    allocaBytes 16 $ \pdigest -> do
-      c_MD5Final pdigest pctxt
-      peekFingerprint (castPtr pdigest)
-
--- This is duplicated in libraries/base/GHC/Fingerprint.hs
-fingerprintString :: String -> Fingerprint
-fingerprintString str = unsafeDupablePerformIO $
-  withArrayLen word8s $ \len p ->
-     fingerprintData p len
-    where word8s = concatMap f str
-          f c = let w32 :: Word32
-                    w32 = fromIntegral (ord c)
-                in [fromIntegral (w32 `shiftR` 24),
-                    fromIntegral (w32 `shiftR` 16),
-                    fromIntegral (w32 `shiftR` 8),
-                    fromIntegral w32]
-
-data MD5Context
-
-foreign import ccall unsafe "MD5Init"
-   c_MD5Init   :: Ptr MD5Context -> IO ()
-foreign import ccall unsafe "MD5Update"
-   c_MD5Update :: Ptr MD5Context -> Ptr Word8 -> CInt -> IO ()
-foreign import ccall unsafe "MD5Final"
-   c_MD5Final  :: Ptr Word8 -> Ptr MD5Context -> IO ()
-##endif
 
 instance Outputable Fingerprint where
   ppr (Fingerprint w1 w2) = text (printf "%016x%016x" w1 w2)

compiler/utils/Outputable.lhs

@@ -93,14 +93,7 @@ import Data.Word
 import System.IO        ( Handle )
 import System.FilePath
 
-
-#if __GLASGOW_HASKELL__ >= 701
 import GHC.Show         ( showMultiLineString )
-#else
-showMultiLineString :: String -> [String]
--- Crude version
-showMultiLineString s = [ showList s "" ]
-#endif
 \end{code}
 
 

compiler/utils/Panic.lhs

@@ -47,9 +47,7 @@ import System.Posix.Signals
 import GHC.ConsoleHandler
 #endif
 
-#if __GLASGOW_HASKELL__ >= 703
 import GHC.Stack
-#endif
 
 #if __GLASGOW_HASKELL__ >= 705
 import System.Mem.Weak  ( Weak, deRefWeak )
@@ -188,15 +186,11 @@ handleGhcException = ghandle
 
 -- | Panics and asserts.
 panic, sorry, pgmError :: String -> a
-#if __GLASGOW_HASKELL__ >= 703
 panic    x = unsafeDupablePerformIO $ do
    stack <- ccsToStrings =<< getCurrentCCS x
    if null stack
       then throwGhcException (Panic x)
       else throwGhcException (Panic (x ++ '\n' : renderStack stack))
-#else
-panic    x = throwGhcException (Panic x)
-#endif
 
 sorry    x = throwGhcException (Sorry x)
 pgmError x = throwGhcException (ProgramError x)

compiler/utils/StringBuffer.lhs

@@ -54,11 +54,7 @@ import System.IO.Unsafe         ( unsafePerformIO )
 
 import GHC.Exts
 
-#if __GLASGOW_HASKELL__ >= 701
 import Foreign.Safe
-#else
-import Foreign hiding           ( unsafePerformIO )
-#endif
 
 -- -----------------------------------------------------------------------------
 -- The StringBuffer type

compiler/utils/md5.c

-/*
- * This code implements the MD5 message-digest algorithm.
- * The algorithm is due to Ron Rivest.  This code was
- * written by Colin Plumb in 1993, no copyright is claimed.
- * This code is in the public domain; do with it what you wish.
- *
- * Equivalent code is available from RSA Data Security, Inc.
- * This code has been tested against that, and is equivalent,
- * except that you don't need to include two pages of legalese
- * with every copy.
- *
- * To compute the message digest of a chunk of bytes, declare an
- * MD5Context structure, pass it to MD5Init, call MD5Update as
- * needed on buffers full of bytes, and then call MD5Final, which
- * will fill a supplied 16-byte array with the digest.
- */
-
-#if __GLASGOW_HASKELL__ < 701
-
-#include "HsFFI.h"
-#include "md5.h"
-#include <string.h>
-
-void MD5Init(struct MD5Context *context);
-void MD5Update(struct MD5Context *context, byte const *buf, int len);
-void MD5Final(byte digest[16], struct MD5Context *context);
-void MD5Transform(word32 buf[4], word32 const in[16]);
-
-
-/*
- * Shuffle the bytes into little-endian order within words, as per the
- * MD5 spec.  Note: this code works regardless of the byte order.
- */
-void
-byteSwap(word32 *buf, unsigned words)
-{
-	byte *p = (byte *)buf;
-
-	do {
-		*buf++ = (word32)((unsigned)p[3] << 8 | p[2]) << 16 |
-			((unsigned)p[1] << 8 | p[0]);
-		p += 4;
-	} while (--words);
-}
-
-/*
- * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
- * initialization constants.
- */
-void
-MD5Init(struct MD5Context *ctx)
-{
-	ctx->buf[0] = 0x67452301;
-	ctx->buf[1] = 0xefcdab89;
-	ctx->buf[2] = 0x98badcfe;
-	ctx->buf[3] = 0x10325476;
-
-	ctx->bytes[0] = 0;
-	ctx->bytes[1] = 0;
-}
-
-/*
- * Update context to reflect the concatenation of another buffer full
- * of bytes.
- */
-void
-MD5Update(struct MD5Context *ctx, byte const *buf, int len)
-{
-	word32 t;
-
-	/* Update byte count */
-
-	t = ctx->bytes[0];
-	if ((ctx->bytes[0] = t + len) < t)
-		ctx->bytes[1]++;	/* Carry from low to high */
-
-	t = 64 - (t & 0x3f);	/* Space available in ctx->in (at least 1) */
-	if ((unsigned)t > len) {
-		memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, len);
-		return;
-	}
-	/* First chunk is an odd size */
-	memcpy((byte *)ctx->in + 64 - (unsigned)t, buf, (unsigned)t);
-	byteSwap(ctx->in, 16);
-	MD5Transform(ctx->buf, ctx->in);
-	buf += (unsigned)t;
-	len -= (unsigned)t;
-
-	/* Process data in 64-byte chunks */
-	while (len >= 64) {
-		memcpy(ctx->in, buf, 64);
-		byteSwap(ctx->in, 16);
-		MD5Transform(ctx->buf, ctx->in);
-		buf += 64;
-		len -= 64;
-	}
-
-	/* Handle any remaining bytes of data. */
-	memcpy(ctx->in, buf, len);
-}
-
-/*
- * Final wrapup - pad to 64-byte boundary with the bit pattern 
- * 1 0* (64-bit count of bits processed, MSB-first)
- */
-void
-MD5Final(byte digest[16], struct MD5Context *ctx)
-{
-	int count = (int)(ctx->bytes[0] & 0x3f); /* Bytes in ctx->in */
-	byte *p = (byte *)ctx->in + count;	/* First unused byte */
-
-	/* Set the first char of padding to 0x80.  There is always room. */
-	*p++ = 0x80;
-
-	/* Bytes of padding needed to make 56 bytes (-8..55) */
-	count = 56 - 1 - count;
-
-	if (count < 0) {	/* Padding forces an extra block */
-		memset(p, 0, count+8);
-		byteSwap(ctx->in, 16);
-		MD5Transform(ctx->buf, ctx->in);
-		p = (byte *)ctx->in;
-		count = 56;
-	}
-	memset(p, 0, count+8);
-	byteSwap(ctx->in, 14);
-
-	/* Append length in bits and transform */
-	ctx->in[14] = ctx->bytes[0] << 3;
-	ctx->in[15] = ctx->bytes[1] << 3 | ctx->bytes[0] >> 29;
-	MD5Transform(ctx->buf, ctx->in);
-
-	byteSwap(ctx->buf, 4);
-	memcpy(digest, ctx->buf, 16);
-	memset(ctx,0,sizeof(ctx));
-}
-
-
-/* The four core functions - F1 is optimized somewhat */
-
-/* #define F1(x, y, z) (x & y | ~x & z) */
-#define F1(x, y, z) (z ^ (x & (y ^ z)))
-#define F2(x, y, z) F1(z, x, y)
-#define F3(x, y, z) (x ^ y ^ z)
-#define F4(x, y, z) (y ^ (x | ~z))
-
-/* This is the central step in the MD5 algorithm. */
-#define MD5STEP(f,w,x,y,z,in,s) \
-	 (w += f(x,y,z) + in, w = (w<<s | w>>(32-s)) + x)
-
-/*
- * The core of the MD5 algorithm, this alters an existing MD5 hash to
- * reflect the addition of 16 longwords of new data.  MD5Update blocks
- * the data and converts bytes into longwords for this routine.
- */
-
-void
-MD5Transform(word32 buf[4], word32 const in[16])
-{
-	register word32 a, b, c, d;
-
-	a = buf[0];
-	b = buf[1];
-	c = buf[2];
-	d = buf[3];
-
-	MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
-	MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
-	MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
-	MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
-	MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
-	MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
-	MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
-	MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
-	MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
-	MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
-	MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
-	MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
-	MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
-	MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
-	MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
-	MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
-
-	MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
-	MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
-	MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
-	MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
-	MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
-	MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
-	MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
-	MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
-	MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
-	MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
-	MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
-	MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
-	MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
-	MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
-	MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
-	MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
-
-	MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
-	MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
-	MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
-	MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
-	MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
-	MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
-	MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
-	MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
-	MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
-	MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
-	MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
-	MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
-	MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
-	MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
-	MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
-	MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
-
-	MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
-	MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
-	MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
-	MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
-	MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
-	MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
-	MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
-	MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
-	MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
-	MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
-	MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
-	MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
-	MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
-	MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
-	MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
-	MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
-
-	buf[0] += a;
-	buf[1] += b;
-	buf[2] += c;
-	buf[3] += d;
-}
-
-#endif

configure.ac

@@ -149,8 +149,8 @@ if test "$BootingFromHc" = "NO"; then
   if test "$WithGhc" = ""; then
      AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
   fi
-  FP_COMPARE_VERSIONS([$GhcVersion],[-lt],[7.0],
-    [AC_MSG_ERROR([GHC version 7.0 or later is required to compile GHC.])])dnl
+  FP_COMPARE_VERSIONS([$GhcVersion],[-lt],[7.4],
+    [AC_MSG_ERROR([GHC version 7.4 or later is required to compile GHC.])])dnl
 
   if test `expr $GhcMinVersion % 2` = "1"; then
      if test "$EnableBootstrapWithDevelSnaphost" = "NO"; then