From: KOSAKI Motohiro <kosaki.motohiro@...>
Date: 2013-05-23T07:32:18+09:00
Subject: [ruby-core:55127] Re: Please, do not break ABI

(5/22/13 9:10 AM), V�t Ondruch wrote:
> Hi guys,
> 
> I have noticed, that Ruby 1.9.3-p362 breaks ABI, i.e. there is removed "rb_class_init_copy" function due to [1]:
> 
> $ nm --dynamic 327/libruby.so.1.9.1 | grep rb_class_init_copy
> 0000000000040850 T rb_class_init_copy
> $ nm --dynamic 362/libruby.so.1.9.1 | grep rb_class_init_copy
> 
> Although "rb_class_init_copy" is probably considered internal, it is exported and somebody can use it. That is 
> not how ABI works. Could you please ensure that no symbols are removed in any patch release?

I don't think rb_class_init_copy can make any problem. However it would be great if anyone develop good ABI breakage
checker and we can run it on ci every day.