fix options breakage with GHC < 7.10

hledger-lib/Hledger/Reports/ReportOptions.hs

@@ -1,4 +1,4 @@
-{-# LANGUAGE RecordWildCards, DeriveDataTypeable #-}
+{-# LANGUAGE CPP, RecordWildCards, DeriveDataTypeable #-}
 {-|
 
 Options common to most hledger reports.
@@ -31,6 +31,9 @@ module Hledger.Reports.ReportOptions (
 where
 
 import Data.Data (Data)
+#if !MIN_VERSION_base(4,8,0)
+import Data.Functor.Compat ((<$>))
+#endif
 import Data.Typeable (Typeable)
 import Data.Time.Calendar
 import System.Console.CmdArgs.Default  -- some additional default stuff

hledger-ui/Hledger/UI/Options.hs

@@ -5,6 +5,9 @@
 
 module Hledger.UI.Options
 where
+#if !MIN_VERSION_base(4,8,0)
+import Data.Functor.Compat ((<$>))
+#endif
 import Data.List (intercalate)
 import System.Console.CmdArgs
 import System.Console.CmdArgs.Explicit

hledger-web/Hledger/Web/Options.hs

@@ -3,7 +3,7 @@ module Hledger.Web.Options
 where
 import Prelude
 #if !MIN_VERSION_base(4,8,0)
-import Control.Applicative ((<$>))
+import Data.Functor.Compat ((<$>))
 #endif
 import Data.Maybe
 import System.Console.CmdArgs

hledger/Hledger/Cli/Options.hs

@@ -64,6 +64,9 @@ import Prelude ()
 import Prelude.Compat
 import qualified Control.Exception as C
 import Control.Monad (when)
+#if !MIN_VERSION_base(4,8,0)
+import Data.Functor.Compat ((<$>))
+#endif
 import Data.List.Compat
 import Data.List.Split (splitOneOf)
 import Data.Maybe