From: Mark Bennett <mark@...>
Date: 2005-01-12T02:27:50+09:00
Subject: Re: Problems Using rb-gsl

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Hi Yoshiki:

Just to update you and the rest of the list, I was able to get this 
problem sorted out with a lot of help from Ara Howard.

Here's what I had to do to fix this problem...

1) Edit /etc/ld.so/conf

Red Hat boxes don't seem to include /usr/local/lib in their search path 
so I added it along with my Ruby lib folder.  My /etc/ld.so.conf now 
looks like:

/usr/kerberos/lib
/usr/X11R6/lib
/usr/lib/qt-3.0.5/lib
/usr/lib/mysql
/usr/local/lib
/usr/local/lib/ruby/site_ruby/1.8/i686-linux

2) Run ldconfig

I ran ldconfig as root to update the ld.so search path

3) Rebuild rb-gsl

Followed the directions to recompile and install rb-gsl

4) Ran rb-gsl examples

When I ran the examples again they now worked with no problems. :-)

Hope this helps anyone else out there with the same problems!  Thanks 
for all the assistance.

-Mark


Yoshiki Tsunesada wrote:

>  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
>>    
>>


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