From 9bb0a659d6d1c58140b9e5bb614a4047d946c1c6 Mon Sep 17 00:00:00 2001
From: Brian Ford <brixen@gmail.com>
Date: Sat, 25 Aug 2012 15:32:52 -0700
Subject: [PATCH] Fixes for compiling pty C-ext on linux.

---
 lib/19/pty/ext/extconf.rb | 1 +
 lib/19/pty/ext/pty.c      | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/19/pty/ext/extconf.rb b/lib/19/pty/ext/extconf.rb
index 97344b9f6e..b51efa1005 100644
--- a/lib/19/pty/ext/extconf.rb
+++ b/lib/19/pty/ext/extconf.rb
@@ -5,6 +5,7 @@
   have_header("sys/wait.h")
   have_func("setresuid")
   have_header("libutil.h")
+  have_header("unistd.h")
   have_header("pty.h")
   have_library("util", "openpty")
   if have_func("openpty") or
diff --git a/lib/19/pty/ext/pty.c b/lib/19/pty/ext/pty.c
index b9fd8a88dd..f3e99c7d88 100644
--- a/lib/19/pty/ext/pty.c
+++ b/lib/19/pty/ext/pty.c
@@ -44,7 +44,7 @@
 #include <unistd.h>
 #endif
 
-#ifdef HAVE_OPENPTY
+#if defined(HAVE_OPENPTY) && !defined(HAVE_PTY_H)
 /* Normally, the following header would be used:
  * #include <util.h>
  *