[commit: packages/bytestring] master: Fix GHC 7.0.1 build by working around Trac #4498 (0671e33)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/bytestring

On branch  : master
Link       : http://git.haskell.org/packages/bytestring.git/commitdiff/0671e336d222b547b0c82974990f5aacddff963f

>---------------------------------------------------------------

commit 0671e336d222b547b0c82974990f5aacddff963f
Author: Ryan Scott <ryan.gl.scott at gmail.com>
Date:   Sun Sep 4 12:05:24 2016 -0400

    Fix GHC 7.0.1 build by working around Trac #4498


>---------------------------------------------------------------

0671e336d222b547b0c82974990f5aacddff963f
 Data/ByteString/Builder/Internal.hs | 4 ++++
 Data/ByteString/Builder/Prim.hs     | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/Data/ByteString/Builder/Internal.hs b/Data/ByteString/Builder/Internal.hs
index 970928d..90b35c6 100644
--- a/Data/ByteString/Builder/Internal.hs
+++ b/Data/ByteString/Builder/Internal.hs
@@ -1,4 +1,8 @@
 {-# LANGUAGE ScopedTypeVariables, CPP, BangPatterns, RankNTypes #-}
+#if __GLASGOW_HASKELL__ == 700
+-- This is needed as a workaround for an old bug in GHC 7.0.1 (Trac #4498)
+{-# LANGUAGE MonoPatBinds #-}
+#endif
 #if __GLASGOW_HASKELL__ >= 703
 {-# LANGUAGE Unsafe #-}
 #endif
diff --git a/Data/ByteString/Builder/Prim.hs b/Data/ByteString/Builder/Prim.hs
index 22a4b8f..777b309 100644
--- a/Data/ByteString/Builder/Prim.hs
+++ b/Data/ByteString/Builder/Prim.hs
@@ -1,5 +1,9 @@
 {-# LANGUAGE CPP, BangPatterns, ScopedTypeVariables #-}
 {-# OPTIONS_GHC -fno-warn-unused-imports #-}
+#if __GLASGOW_HASKELL__ == 700
+-- This is needed as a workaround for an old bug in GHC 7.0.1 (Trac #4498)
+{-# LANGUAGE MonoPatBinds #-}
+#endif
 #if __GLASGOW_HASKELL__ >= 701
 {-# LANGUAGE Trustworthy #-}
 #endif