[commit: packages/process] master: Add comment why no-op function for issue #21 (7ca2448)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/7ca24488f44ad4fd45b0e27fe1d21708db4b48d4/process

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

commit 7ca24488f44ad4fd45b0e27fe1d21708db4b48d4
Author: Takenobu Tani <takenobu.hs at gmail.com>
Date:   Wed Feb 18 23:20:27 2015 +0900

    Add comment why no-op function for issue #21


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7ca24488f44ad4fd45b0e27fe1d21708db4b48d4
 System/Process/Internals.hs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/System/Process/Internals.hs b/System/Process/Internals.hs
index 23e92a2..87d1d46 100644
--- a/System/Process/Internals.hs
+++ b/System/Process/Internals.hs
@@ -463,6 +463,9 @@ createProcess_ fun CreateProcess{ cmdspec = cmdsp,
 runInteractiveProcess_lock :: MVar ()
 runInteractiveProcess_lock = unsafePerformIO $ newMVar ()
 
+-- Following functions are always exported in export list.
+-- It should be a no-op function on Windows.
+-- see the <https://github.com/haskell/process/pull/21>
 startDelegateControlC :: IO ()
 startDelegateControlC = return ()