https://git.ruby-lang.org/ruby.git/commit/?id=ec9a9aaa51

From ec9a9aaa5171f176076f52180248329de9920ff6 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 23 Jun 2020 00:14:39 +0900
Subject: Ignore configurations in un-built extension libraries

Exclude linker flags for external libraries used by no longer
built extension libraries when static-linked-ext.

diff --git a/template/exts.mk.tmpl b/template/exts.mk.tmpl
index 5a72912..e4706be 100644
--- a/template/exts.mk.tmpl
+++ b/template/exts.mk.tmpl
@@ -39,6 +39,7 @@ Dir.glob("{ext,.bundle/gems}/*/exts.mk") do |e| https://github.com/ruby/ruby/blob/trunk/template/exts.mk.tmpl#L39
     else
       macros[n] = m | v
     end
+    break if n == "old_extensions"
   end
   if gem
     r = ""
-- 
cgit v0.10.2


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