From 95f387f61a4a4ea92635da760b7de5b1e09bb84e Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Wed, 4 Mar 2020 18:41:47 +0900
Subject: [PATCH] [ruby/fiddle] ffi_closure_free is available in the bundled
 libffi

---
 ext/fiddle/extconf.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/ext/fiddle/extconf.rb b/ext/fiddle/extconf.rb
index 915afb986e..2d0e188c9c 100644
--- a/ext/fiddle/extconf.rb
+++ b/ext/fiddle/extconf.rb
@@ -135,7 +135,6 @@ elsif have_header "windows.h"
 end
 
 have_const('FFI_STDCALL', ffi_header)
-have_func('ffi_closure_alloc', ffi_header)
 
 config = File.read(RbConfig.expand(File.join($arch_hdrdir, "ruby/config.h")))
 types = {"SIZE_T"=>"SSIZE_T", "PTRDIFF_T"=>nil, "INTPTR_T"=>nil}
@@ -154,6 +153,9 @@ end
 if libffi
   $LOCAL_LIBS.prepend("./#{libffi.a} ").strip! # to exts.mk
   $INCFLAGS.gsub!(/-I#{libffi.dir}/, '-I$(LIBFFI_DIR)')
+  $defs << "-DUSE_FFI_CLOSURE_ALLOC=1"
+else
+  have_func('ffi_closure_alloc', ffi_header)
 end
 $INCFLAGS << " -I$(top_srcdir)"
 create_makefile 'fiddle' do |conf|