Re: Dynamic linking with libpcap

[Guy Harris <guy () alum mit edu>]

On Sep 25, 2008, at 12:31 AM, Munish Dayal wrote:

> I am still facing this problem. Any suggestions?
> Do I have to downgrade the libpcap from version 0.9.4 to 0.8.3 on  
> RHEL-5 system, in order to be able to run Wireshark on it.  
> (Wireshark rpm built on RHEL-4 system).

Or build Wireshark on the RHEL 5 system to run it there.

I don't know what indicates to the build-time linker what library  
version number to record in an executable, but it doesn't appear to be  
something simple based on what symbolic links point to what; perhaps  
it's something recorded in the shared library itself.  In any case,  
unlike the other shared libraries on your system, libpcap is built so  
that the "real name", not the "soname":

        http://www.tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html

is being recorded, which means that, unfortunately, the executable  
won't work with any "libpcap.so.0", but requires the same version as  
the one with which it was built - the fact that (unless the  
distribution screwed things up massively) all libpcap 0.x releases  
since at least 0.7 are binary-compatible.
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