https://git.ruby-lang.org/ruby.git/commit/?id=520ac5da22

From 520ac5da22c30d6db25de6dcbff9607d8a9cd870 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Fri, 1 May 2020 10:58:27 +0900
Subject: [pty] do not check openpty twice if found in util library


diff --git a/ext/pty/extconf.rb b/ext/pty/extconf.rb
index 7721a74..038bdf4 100644
--- a/ext/pty/extconf.rb
+++ b/ext/pty/extconf.rb
@@ -10,9 +10,9 @@ if /mswin|mingw|bccwin/ !~ RUBY_PLATFORM https://github.com/ruby/ruby/blob/trunk/ext/pty/extconf.rb#L10
   have_header("util.h") # OpenBSD openpty
   have_header("pty.h")
   have_header("pwd.h")
-  have_library("util", "openpty")
+  util = have_library("util", "openpty")
   if have_func("posix_openpt") or
-      have_func("openpty") or
+      (util or have_func("openpty")) or
       have_func("_getpty") or
       have_func("ptsname") or
       have_func("ioctl")
-- 
cgit v0.10.2


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