From 4fca0ca666801c3ea3f977db1c36c3796f01ad41 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 10 Dec 2024 13:05:00 +0900
Subject: [PATCH] A workaround for JRuby to check for the target OS (Fix #69)

Instead of checking for the existence of the necessary function.  On
JRuby no C compiler is available and this call results in a runtime
error.
---
 ext/win32/resolv/extconf.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/win32/resolv/extconf.rb b/ext/win32/resolv/extconf.rb
index ac865ec..336f930 100644
--- a/ext/win32/resolv/extconf.rb
+++ b/ext/win32/resolv/extconf.rb
@@ -1,5 +1,5 @@
 require 'mkmf'
-if have_library('iphlpapi', 'GetNetworkParams')
+if /cygwin|mingw|mswin/ =~ RbConfig::CONFIG['target_os']
   create_makefile('win32/resolv')
 else
   File.write('Makefile', "all clean install:\n\t@echo Done: $(@)\n")