From 69e209a3450bd6b281dcad1d96a34e9cab184845 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 19 Sep 2019 12:03:58 +0900
Subject: DEBUG: dump mkmf.log

---
 ext/extmk.rb | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'ext/extmk.rb')

diff --git a/ext/extmk.rb b/ext/extmk.rb
index 6045750fd2..1480ad6ffe 100755
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -270,6 +270,12 @@ def extmake(target, basedir = 'ext', maybestatic = true)
     end
   ensure
     Logging::log_close
+    if error
+      STDERR.print("#{message}\n\t#{error.backtrace.join("\n\t")}\n")
+      if File.exist?("mkmf.log")
+        IO.copy_stream("mkmf.log", STDERR)
+      end
+    end
     if rbconfig0
       RbConfig.module_eval {
 	remove_const(:CONFIG)
-- 
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