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-rw-r--r--src/Text/Pandoc/Compat/Time.hs12
1 files changed, 12 insertions, 0 deletions
diff --git a/src/Text/Pandoc/Compat/Time.hs b/src/Text/Pandoc/Compat/Time.hs
index aa08ca224..b1cde82a4 100644
--- a/src/Text/Pandoc/Compat/Time.hs
+++ b/src/Text/Pandoc/Compat/Time.hs
@@ -1,4 +1,16 @@
{-# LANGUAGE CPP #-}
+
+{-
+This compatibility module is needed because, in time 1.5, the
+`defaultTimeLocale` function was moved from System.Locale (in the
+old-locale library) into Data.Time.
+
+We support both behaviors because time 1.4 is a boot library for GHC
+7.8. time 1.5 is a boot library for GHC 7.10.
+
+When support is dropped for GHC 7.8, this module may be obsoleted.
+-}
+
#if MIN_VERSION_time(1,5,0)
module Text.Pandoc.Compat.Time (
module Data.Time