Move some flags from the Makefile into module pragmas

compiler/Makefile

@@ -645,14 +645,6 @@ endif
 
 # basicTypes/SrcLoc_HC_OPTS	= -funbox-strict-fields
 
-# We always optimise some low-level modules, otherwise performance of
-# a non-optimised compiler is severely affected.
-utils/Binary_HC_OPTS		+= -O -funbox-strict-fields
-utils/FastMutInt_HC_OPTS	+= -O
-utils/Encoding_HC_OPTS		+= -O
-utils/StringBuffer_HC_OPTS	+= -O -funbox-strict-fields
-utils/FastString_HC_OPTS	+= -O -funbox-strict-fields
-
 # ---- Profiling ----
 #simplCore/Simplify_HC_OPTS = -auto-all
 #simplCore/SimplEnv_HC_OPTS = -auto-all

compiler/utils/Binary.hs

 {-# OPTIONS -cpp #-}
+{-# OPTIONS_GHC -O -funbox-strict-fields #-}
+-- We always optimise this, otherwise performance of a non-optimised
+-- compiler is severely affected
+
 --
 -- (c) The University of Glasgow 2002-2006
 --

compiler/utils/Encoding.hs

+{-# OPTIONS_GHC -O #-}
+-- We always optimise this, otherwise performance of a non-optimised
+-- compiler is severely affected
+
 -- -----------------------------------------------------------------------------
 --
 -- (c) The University of Glasgow, 1997-2006

compiler/utils/FastMutInt.lhs

+\begin{code}
 {-# OPTIONS -cpp #-}
+{-# OPTIONS_GHC -O #-}
+-- We always optimise this, otherwise performance of a non-optimised
+-- compiler is severely affected
+
 --
 -- (c) The University of Glasgow 2002-2006
 --
 -- Unboxed mutable Ints
 
-\begin{code}
 module FastMutInt(
 	FastMutInt, newFastMutInt,
 	readFastMutInt, writeFastMutInt,

compiler/utils/FastString.lhs

@@ -2,6 +2,10 @@
 % (c) The University of Glasgow, 1997-2006
 %
 \begin{code}
+{-# OPTIONS_GHC -O -funbox-strict-fields #-}
+-- We always optimise this, otherwise performance of a non-optimised
+-- compiler is severely affected
+
 {-
 FastString:     A compact, hash-consed, representation of character strings.
                 Comparison is O(1), and you can get a Unique from them.

compiler/utils/StringBuffer.lhs

@@ -6,6 +6,10 @@
 Buffers for scanning string input stored in external arrays.
 
 \begin{code}
+{-# OPTIONS_GHC -O -funbox-strict-fields #-}
+-- We always optimise this, otherwise performance of a non-optimised
+-- compiler is severely affected
+
 module StringBuffer
        (
         StringBuffer(..),