From: Athanasopoulos <elias.athanasopoulos@...>
Date: 2006-08-28T21:50:13+09:00
Subject: Re: Version Check in C Extension

Hello!

ts wrote:
> >>>>> "e" == elias athanasopoulos <elias.athanasopoulos@gmail.com> writes:
>
> e> How can I check for the Ruby version inside a C extension?
>
>  Try to avoid to test the ruby version, but rather test the functionality
>  that you want in extconf.rb.
>
>  For example
>
> moulon% ruby -rmkmf -ve 'have_func("rb_frame_this_func")'
> ruby 1.8.4 (2005-12-24) [i486-linux]
> checking for rb_frame_this_func()... no
> moulon%
>
>
> moulon% ./ruby -rmkmf -ve 'have_func("rb_frame_this_func")'
> ruby 1.9.0 (2006-07-14) [i686-linux]
> checking for rb_frame_this_func()... yes
> moulon%

Right. This is the problem I have to deal with. My extension uses
rb_frame_last_func() which is subsituted with rb_frame_this_func() in
1.9. So, I have to alter the actual code to use rb_frame_last_func() or
rb_frame_this_func() according to the ruby version installed in the
system. 

So, checking in the Makefile will not help.

Regards,
Elias