From d896746d692ee1f11ee22f1ee2ef0b8f79ecfe10 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Thu, 25 Nov 2021 15:38:24 +0900
Subject: [PATCH] Keep the generated source files when clean [Bug #18363]

---
 ext/ripper/extconf.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ext/ripper/extconf.rb b/ext/ripper/extconf.rb
index 2dde565bd9..65cb5030d3 100644
--- a/ext/ripper/extconf.rb
+++ b/ext/ripper/extconf.rb
@@ -13,7 +13,8 @@ def main
     end
   end
   $objs = %w(ripper.o)
-  $cleanfiles.concat %w(ripper.y ripper.c ripper.E ripper.output y.output eventids1.c eventids2table.c .eventids2-check)
+  $distcleanfiles.concat %w(ripper.y ripper.c eventids1.c eventids2table.c)
+  $cleanfiles.concat %w(ripper.E ripper.output y.output .eventids2-check)
   $defs << '-DRIPPER'
   $defs << '-DRIPPER_DEBUG' if $debug
   $VPATH << '$(topdir)' << '$(top_srcdir)'