From 28dde6749327fd15a1b8b7bcf5cc74a95598582a Mon Sep 17 00:00:00 2001
From: Mario Lang <mlang@delysid.org>
Date: Fri, 29 Dec 2017 10:35:05 +0100
Subject: [PATCH] Check for ioperm to make sure the platform supports ports
 I/O. (ml)

Signed-off-by: Mario Lang <mlang@blind.guru>
---
This patch was taken from upstream, and can be removed when 5.6 is out.

 configure.ac | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 5e94d33bd..07119dd9f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1446,7 +1446,9 @@ BRLTTY_ARG_PACKAGE([ports], [I/O ports], [], [dnl
       ports_package="kfreebsd"
       ;;
    linux*)
-      ports_package="glibc"
+      AC_CHECK_FUNC([ioperm], [
+         ports_package="glibc"
+      ])
       ;;
    mingw*)
       ports_package="windows"
-- 
2.15.0