From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 11 Sep 2022 16:06:35 +0900
Subject: Fallback PKG_CONFIG to the configured pkg-config always

---
 lib/mkmf.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index 8241494..3014c2a 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1867,7 +1867,7 @@ SRC
     if pkgconfig = with_config("#{pkg}-config") and find_executable0(pkgconfig)
       # if and only if package specific config command is given
     elsif ($PKGCONFIG ||=
-           (pkgconfig = with_config("pkg-config", ("pkg-config" unless CROSS_COMPILING))) &&
+           (pkgconfig = with_config("pkg-config", RbConfig::CONFIG["PKG_CONFIG"])) &&
            find_executable0(pkgconfig) && pkgconfig) and
         xsystem([*envs, $PKGCONFIG, "--exists", pkg])
       # default to pkg-config command