From: Eric Hodel <drbrain@...7.net>
Date: 2011-08-24T06:39:16+09:00
Subject: Re: mkmf & config question

On Aug 22, 2011, at 5:49 AM, serialhex wrote:

> ok so check this out:
> 
> pry(main)> require 'mkmf'
> => true
> pry(main)> CONFIG['sitedir']
> => "$(libdir)/ruby/site_ruby"
> pry(main)> CONFIG['libdir']
> => "$(exec_prefix)/lib"
> pry(main)> CONFIG['exec_prefix']
> => "$(prefix)"
> pry(main)> CONFIG['prefix']
> => "/home/serialhex/.rvm/rubies/ruby-1.8.7-p352"
> pry(main)> CONFIG['prefix'] = '/foo/bar'
> => "/foo/bar"
> pry(main)> Config::expand CONFIG['sitedir']
> => "/home/serialhex/.rvm/rubies/ruby-1.8.7-p352/lib/ruby/site_ruby"
> pry(main)> CONFIG['prefix']
> => "/foo/bar"
> 
> why when i change CONFIG['prefix'] to '/foo/bar' does it not
> change Config::expand CONFIG['sitedir'] to "/foo/bar/lib/ruby/site_ruby"???
> and how would i get it to do that?


Install ruby like:

./configure --prefix=/foo/bar
make
make install

DO NOT CHANGE THE ENTRIES IN RbConfig::CONFIG, IT WILL ONLY LEAD TO MADNESS

Please explain why you want to change the prefix of ruby so we can answer your question properly.