From 79d8a3159f60d32396c8281fe438e86ab97e3daa Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Tue, 5 Aug 2025 21:34:03 +0900
Subject: [PATCH] Check if the found pkg-config is usable actually

---
 test/mkmf/test_pkg_config.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/mkmf/test_pkg_config.rb b/test/mkmf/test_pkg_config.rb
index d0a2dc130a..abeaf548f8 100644
--- a/test/mkmf/test_pkg_config.rb
+++ b/test/mkmf/test_pkg_config.rb
@@ -3,7 +3,9 @@ require_relative 'base'
 require 'shellwords'
 
 class TestMkmfPkgConfig < TestMkmf
-  PKG_CONFIG = config_string("PKG_CONFIG") {|path| find_executable0(path)}
+  PKG_CONFIG = config_string("PKG_CONFIG") do |path|
+    find_executable0(path, "--version") {$?.success?}
+  end
 
   def setup
     super