From cf460840b825f2fd7521b0ae211353080d33ceef Mon Sep 17 00:00:00 2001
From: Hiroshi SHIBATA <hsbt@ruby-lang.org>
Date: Mon, 25 Mar 2024 15:16:22 +0900
Subject: Guard makefile target at cross-build

http://rubyci.s3.amazonaws.com/crossruby/crossruby-master-aarch64/log/20240325T041917Z.fail.html.gz
---
 tool/rbinstall.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
index 7cb584bdd7..c3926e98ec 100755
--- a/tool/rbinstall.rb
+++ b/tool/rbinstall.rb
@@ -754,7 +754,7 @@ module RbInstall
         makefile = File.read(makefile_path)
 
         name = makefile[/^TARGET[ \t]*=[ \t]*((?:.*\\\n)*.*)/, 1]
-        return [] if name.empty?
+        return [] if name.nil? || name.empty?
 
         feature = makefile[/^DLLIB[ \t]*=[ \t]*((?:.*\\\n)*.*)/, 1]
         feature = feature.sub("$(TARGET)", name)
-- 
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