extconf.rb in stackprof-0.2.21

- old
+ new

@@ -1,5 +1,11 @@
 require 'mkmf'
+
+if RUBY_ENGINE == 'truffleruby'
+  File.write('Makefile', dummy_makefile($srcdir).join(""))
+  return
+end
+
 if have_func('rb_postponed_job_register_one') &&
    have_func('rb_profile_frames') &&
    have_func('rb_tracepoint_new') &&
    have_const('RUBY_INTERNAL_EVENT_NEWOBJ')
   create_makefile('stackprof/stackprof')