From a230864098711e94251b701888475385c77c016d Mon Sep 17 00:00:00 2001
From: Ken Brown <kbrown@cornell.edu>
Date: Thu, 30 Jan 2020 21:58:33 -0500
Subject: [PATCH] Extend workaround for Cygwin O_PATH bug

* configure.ac (HAVE_CYGWIN_O_PATH_BUG): Extend to Cygwin versions
3.1.0 through 3.1.2.  (Bug#99999)
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 02ec57e6ab..3c47da6dcb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5751,9 +5751,9 @@ AC_DEFUN
     AC_MSG_WARN([[building Emacs on Cygwin 1.5 is not supported.]])
            echo
 	   ;;
-  cygwin,3.0.[[0-7]]'('*)
+  cygwin,3.0.[[0-7]]'('* | cygwin,3.1.[[0-2]]'('*)
     AC_DEFINE([HAVE_CYGWIN_O_PATH_BUG], 1,
-      [Define to 1 if opening a FIFO with O_PATH causes a hang.]);;
+      [Define to 1 if opening a FIFO, socket, or symlink with O_PATH is buggy.]);;
 esac
 
 # Remove any trailing slashes in these variables.
-- 
2.21.0