ext/fiddle/extconf.rb in fiddle-1.1.2 vs ext/fiddle/extconf.rb in fiddle-1.1.3

@@ -1,8 +1,13 @@
 # frozen_string_literal: true
 require 'mkmf'
 
+unless RUBY_ENGINE == "ruby"
+  File.write('Makefile', dummy_makefile("").join)
+  return
+end
+
 # :stopdoc:
 
 def gcc?
   RbConfig::CONFIG["GCC"] == "yes"
 end
@@ -216,9 +221,11 @@
 
 if libffi
   $LOCAL_LIBS.prepend("#{libffi.a} ").strip! # to exts.mk
   $INCFLAGS.gsub!(/-I#{libffi.dir}/, '-I$(LIBFFI_DIR)')
 end
+
+have_func("rb_str_to_interned_str")
 create_makefile 'fiddle' do |conf|
   if !libffi
     next conf << "LIBFFI_CLEAN = none\n"
   elsif $gnumake && !$nmake
     submake_arg = "-C $(LIBFFI_DIR)\n"