From 7c879cbb3f24c742e0d3226c39d413abe7519205 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 22 Nov 2020 19:10:58 +0900
Subject: [PATCH] Suppress a unused-variable warning

---
 spec/ruby/optional/capi/ext/io_spec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/spec/ruby/optional/capi/ext/io_spec.c b/spec/ruby/optional/capi/ext/io_spec.c
index 59613c110f..73e6804013 100644
--- a/spec/ruby/optional/capi/ext/io_spec.c
+++ b/spec/ruby/optional/capi/ext/io_spec.c
@@ -203,7 +203,9 @@ VALUE io_spec_rb_io_close(VALUE self, VALUE io) {
 
 VALUE io_spec_rb_io_set_nonblock(VALUE self, VALUE io) {
   rb_io_t* fp;
+#ifdef F_GETFL
   int flags;
+#endif
   GetOpenFile(io, fp);
   rb_io_set_nonblock(fp);
 #ifdef F_GETFL