From: Tim Hunter <TimHunter@...>
Date: 2009-02-20T11:42:49+09:00
Subject: Re: How to do conditional compile for Ruby 1.9 in a C extens

Jason Garber wrote:
> version.h couldn't be found.  I've read that version.h is deprecated in 
> Ruby 1.9.  There's either got to be another way to detect the change or 
> a way to work around it.  I'd just use map! to convert the strings to 
> symbols if I knew how to do it in C.

I'm not saying this is the best way (maybe Nobu can provide a better 
answer), but if you can be sure that mkmf.rb is being executed by the 
same version of Ruby, then you could cook up a feature test in your 
extconf.rb that would create a preprocessor symbol to test. Determine 
what singleton_methods is doing, then call $defs.push to set a symbol:

     $defs.push("-DNEW_SINGLETON_METHODS")

-- 
RMagick: http://rmagick.rubyforge.org/