From 247f50e08d4a0b990c44664cd3a8b2c5bb74d01e Mon Sep 17 00:00:00 2001
From: David Wilson <dw@botanicus.net>
Date: Tue, 28 Nov 2017 13:42:10 +0530
Subject: [PATCH] master: add comment

---
 mitogen/master.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mitogen/master.py b/mitogen/master.py
index 9af10657..37829e41 100644
--- a/mitogen/master.py
+++ b/mitogen/master.py
@@ -135,6 +135,9 @@ def cfmakeraw(tflags):
     cflag &= ~flags('CSIZE PARENB')
     cflag |= flags('CS8')
 
+    # TODO: one or more of the above bit twiddles sets or omits a necessary
+    # flag. Forcing these fields to zero, as shown below, gets us what we want
+    # on Linux/OS X, but it is possibly broken on some other OS.
     iflag = 0
     oflag = 0
     lflag = 0