From: Alex Fenton <alex@...>
Date: 2007-12-27T07:19:43+09:00
Subject: Re: Paths, environment variables, etc. for building C extensions with Ruby 1.9?

M. Edward (Ed) Borasky wrote:
> Are there some paths or environment variables I need to set with Ruby
> 1.9.0-0 to build gems with C code in them? 
One thing that I couldn't find to build C extensions with in the 
released 1.9.0 is the path to ruby/config.h. Config::CONFIG has the 
paths to the other header files but I had to fake this one with

    File.join(Config::CONFIG["rubyhdrdir"], Config::CONFIG['arch'])

Also there doesn't seem to be a convenient Config key with the whole set 
of -I flags needed:

  includes = [ Config::CONFIG["rubyhdrdir"],
    Config::CONFIG["sitehdrdir"],
    Config::CONFIG["vendorhdrdir"],
    File.join(Config::CONFIG["rubyhdrdir"], Config::CONFIG['arch'])  ]
  $ruby_includes = " -I " + includes.join(' -I ')

thanks very much to everyone who's worked on 1.9.0

alex