Support building on GHC with integer-simple

[singpolyma]

Related to #1

[singpolyma]

The following patch is obviously not a solution, but it builds for me:

diff --git a/Blaze/Text/Int.hs b/Blaze/Text/Int.hs
index 33d0ee6..5f26625 100644
--- a/Blaze/Text/Int.hs
+++ b/Blaze/Text/Int.hs
@@ -27,14 +27,10 @@ import GHC.Num (quotRemInteger)
 import GHC.Types (Int(..))

 #ifdef  __GLASGOW_HASKELL__
-# if __GLASGOW_HASKELL__ < 611
-import GHC.Integer.Internals
-# else
-import GHC.Integer.GMP.Internals
-# endif
+import GHC.Integer.Simple.Internals
 #endif

-#ifdef INTEGER_GMP
+#ifdef __GLASGOW_HASKELL__
 # define PAIR(a,b) (# a,b #)
 #else
 # define PAIR(a,b) (a,b)
@@ -106,7 +102,6 @@ int = integral
 {-# INLINE int #-}

 integer :: Integer -> Builder
-integer (S# i#) = int (I# i#)
 integer i
     | i < 0     = minus `mappend` go (-i)
     | otherwise = go i
diff --git a/blaze-textual.cabal b/blaze-textual.cabal
index 99cf086..7898e20 100644
--- a/blaze-textual.cabal
+++ b/blaze-textual.cabal
@@ -45,6 +45,7 @@ library
     other-modules: Blaze.Text.Double.Native

   build-depends:
+    integer-simple,
     base == 4.*,
     blaze-builder >= 0.2.1.4,
     bytestring,
@@ -67,14 +68,6 @@ library

   ghc-options:      -Wall

-  if impl(ghc >= 6.11)
-    cpp-options: -DINTEGER_GMP
-    build-depends: integer-gmp >= 0.2
-
-  if impl(ghc >= 6.9) && impl(ghc < 6.11)
-    cpp-options: -DINTEGER_GMP
-    build-depends: integer >= 0.1 && < 0.2
-
 test-suite tests
   type:           exitcode-stdio-1.0
   hs-source-dirs: tests

[andrewthad]

This is also a problem for me.