From: Jason Garber <jg@...>
Date: 2009-02-20T05:59:37+09:00
Subject: Re: How to do conditional compile for Ruby 1.9 in a C extens

It's not working for me.  In my C file I tested the presence of those 
variables like so:

#ifdef RUBY_VERSION_MAJOR
    printf("RUBY_VERSION_MAJOR defined\n");
#endif
#ifndef RUBY_VERSION_MAJOR
    printf("RUBY_VERSION_MAJOR NOT defined ******\n");
#endif

and it outputs RUBY_VERSION_MAJOR NOT defined ******

Why aren't the RUBY_VERSION constants defined?
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