ext/io/nonblock/extconf.rb in io-nonblock-0.2.0 vs ext/io/nonblock/extconf.rb in io-nonblock-0.3.0

@@ -1,8 +1,15 @@
 # frozen_string_literal: false
 require 'mkmf'
 target = "io/nonblock"
 
+unless RUBY_ENGINE == 'ruby'
+  File.write("Makefile", dummy_makefile($srcdir).join(""))
+  return
+end
+
+have_func("rb_io_descriptor")
+
 hdr = %w"fcntl.h"
 if have_macro("O_NONBLOCK", hdr) and
     (have_macro("F_GETFL", hdr) or have_macro("F_SETFL", hdr))
   create_makefile(target)
 end