From: Yoshiki Tsunesada <ytsunesada@...>
Date: 2005-01-11T11:14:47+09:00
Subject: Re: Problems Using rb-gsl

  Mark,

  * I guess you use GCC 3.1: it warns "changing search order 
    for system directory" when an option -I/usr/local/include 
    is given. If you use newer(older) GCC, the warning won't 
    appear.
  * The message you showed says, the shared object rb_gsl.so 
    is not found in your system, but it is installed in 
    /usr/local/lib/ruby/site_ruby/1.8/i686-linux/. 
      As you shown, narray.so is also installed in the same 
    place, and how about is it (or other Ruby wrappers of C
    libraries)? Is it possible to run scripts using NArray?
      I'm not sure the problem is of rb-gsl or of the system.

  Yoshiki

On Tue, 11 Jan 2005 06:22:17 +0900, Mark Bennett wrote:
> I'm trying to use rb-gsl in an application I'm writing and am able to 
> use it on Mac OS X but not Linux.  On an old Red Hat 7.3 box I see 
> the following error messages when compiling use, 'ruby setup.rb 
> setup':
> 
> gcc -fPIC -I../include -Wall -I/usr/local/include  -I. 
> -I/usr/local/lib/ruby/1.8/i686-linux 
> -I/usr/local/lib/ruby/1.8/i686-linux 
> -I/home/mark/versioned/praxis/sbcalc/third_party/rb-gsl-1.6.0/ext   
> -c wavelet.c
> cc1: warning: changing search order for system directory 
> "/usr/local/include"
> cc1: warning:   as it has already been specified as a non-system directory
> 
> It says this for all files being compiled.  When I try to run any of 
> the sample applications included with rb-gsl I see the message:
> 
> /usr/local/lib/ruby/site_ruby/1.8/i686-linux/rb_gsl.so: libgsl.so.0: 
> cannot open shared object file: No such file or directory - 
> /usr/local/lib/ruby/site_ruby/1.8/i686-linux/rb_gsl.so (LoadError)
>        from /usr/local/lib/ruby/site_ruby/1.8/gsl.rb:1
>        from cheb.rb:2:in `require'
>        from cheb.rb:2
> 
> This same procedure works just find on my Mac.  I've run ldconfig to 
> make sure all my GSL libraries are found, and I run 'make test' after 
> installing GSL.  All tests passed.
> 
> Does anyone out there have a suggestion for what to do?
> 
> Thanks!
> 
> -Mark