https://git.ruby-lang.org/ruby.git/commit/?id=7f4345639b

From 7f4345639b09395f2ab423d1cdac6f2ddf0707de Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Sun, 27 Feb 2022 20:09:58 +0900
Subject: fake.rb: Set prefix to `$topdir`

Not to refer outside the top build directory from rbconfig.
---
 tool/fake.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tool/fake.rb b/tool/fake.rb
index 47e3855116..88709b2f23 100644
--- a/tool/fake.rb
+++ b/tool/fake.rb
@@ -48,6 +48,7 @@ prehook = proc do |extmk| https://github.com/ruby/ruby/blob/trunk/tool/fake.rb#L48
   RbConfig.fire_update!("builddir", builddir)
   RbConfig.fire_update!("buildlibdir", builddir)
   RbConfig.fire_update!("libdir", builddir)
+  RbConfig.fire_update!("prefix", $topdir)
   RbConfig.fire_update!("top_srcdir", $top_srcdir ||= top_srcdir)
   RbConfig.fire_update!("extout", $extout)
   RbConfig.fire_update!("rubyhdrdir", "$(top_srcdir)/include")
-- 
cgit v1.2.1


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