From 224783ad1543ed1c5b9b63a3704d8df6ae1bfce6 Mon Sep 17 00:00:00 2001
From: Stan Hu <stanhu@gmail.com>
Date: Fri, 2 Feb 2024 13:21:27 -0800
Subject: [PATCH] Fix extension not building on Ruby 3.2

In Ruby 3.2 it appears `CONFIG['host_os']` resolves to `$(target_os)`.
Use `RbConfig::CONFIG` instead of `CONFIG`.
---
 extconf.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/extconf.rb b/extconf.rb
index d17f926..55dcff5 100644
--- a/extconf.rb
+++ b/extconf.rb
@@ -14,7 +14,7 @@
           else; ''
           end
 
-implementation = case CONFIG['host_os']
+implementation = case RbConfig::CONFIG['host_os']
                  when /linux/i; 'shadow'
                  when /sunos|solaris/i; 'shadow'
                  when /freebsd|mirbsd|netbsd|openbsd/i; 'pwd'