From b54ff6b1aa875c1a059e990d7e8c6a674b6f81b3 Mon Sep 17 00:00:00 2001
From: KO Myung-Hun <address@hidden>
Date: Sat, 10 Oct 2015 23:59:30 +0900
Subject: [PATCH 4/4] Clear cf_XOPEN_SOURCE on OS/2

If _XOPEN_SOURCE is defined, C++ compilation fails on OS/2.

    modified:   aclocal.m4
---
 aclocal.m4 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/aclocal.m4 b/aclocal.m4
index 644c0cd..c0db418 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -7686,6 +7686,9 @@ case $host_os in
 (openbsd*)
 	# setting _XOPEN_SOURCE breaks xterm on OpenBSD 2.8, is not needed for ncursesw
 	;;
+(os2*)
+	cf_XOPEN_SOURCE=
+	;;
 (osf[[45]]*)
 	cf_xopen_source="-D_OSF_SOURCE"
 	;;
-- 
2.6.0