How to make a symbolic link ?

chrislabricole · 01-17-2009, 01:34 PM

Hi all,

Since around one week, I'm trying to execute a MTA server (GTA San Andreas...).
But, when I execute it, I get those errors :

Quote:

Originally Posted by SSH

[root@#### mtaserver]# ./mta_server
./mta_server: /usr/lib/libstdc++.so.6: no version information available (required by ./mta_server)
./mta_server: /usr/lib/libstdc++.so.6: no version information available (required by ./mta_server)
./mta_server: relocation error: ./mta_server: undefined symbol: _ZN11xercesc_2_76XMLUni22fgXercescDefaultLocaleE

And, if I send the command "ldconfig", I get this :

Quote:

Originally Posted by SSH

[root@#### mtaserver]# ldconfig ./mta_server
ldconfig: /lib/libstdc++-libc6.2-2.so.3 is not a symbolic link

ldconfig: /usr/local/lib/libstdc++-libc6.2-2.so.3 is not a symbolic link

What it's this symbolic link ??
How to make it ?

Thanks by advance,
Regards.

jailbait · 01-17-2009, 02:49 PM

As is typical with library modules libstdc could be installed as one of several versions. Typically only one version is installed and the other possible versions are represented as a symbolic link to the installed version. A symbolic link is another name pointing to the installed module. For example I have /usr/lib/libstdc++.so.6.0.10 installed. I also have /usr/liblibstdc++.so.6 as a symbolic link pointing to /usr/lib/libstdc++.so.6.0.10 so you can access libstdc++ under either name.

In your first error you need to look at the files in /usr/lib and check on the name /usr/lib/libstdc++.so.6. It probably should be a symbolic link to some existing file with a 6.x.x release number. If that guess is correct then you can make /usr/lib/libstdc++.so.6 a symbolic link to the correct module with this command entered as root:

ln -s /usr/lib/libstdc++.so.6.x.x /usr/lib/libstdc++.so.6

You have a similar problem in /usr/local/lib in that libc6.2-2.so.3 is probably missing or linking to the wrong file.

Once you get the symbolic links straightened away then you will have to run the ldconfig program:

ldconfig

in order to update the load library list. ldconfig is also issued at boot and it is issued by any package install that updates the shared libraries.

--------------------------
Steve Stites

P.S. This problem sounds like you have installed some packages and the installs got screwed up. If so you could possible fix the problem by uninstalling the messed up installs and reinstalling them again.

chrislabricole · 01-18-2009, 03:54 AM

Thanks ! it's better !

But, always some errors...
When I send the command ldconfig, I get anything !

If I'm trying to execute the server, I get those errors :

Quote:

Originally Posted by SSH

[root@#### mtaserver]# ./mta_server
./mta_server: /lib/libstdc++.so.6: no version information available (required by ./mta_server)
./mta_server: /lib/libstdc++.so.6: no version information available (required by ./mta_server)
./mta_server: relocation error: ./mta_server: undefined symbol: _ZN11xercesc_2_76XMLUni22fgXercescDefaultLocaleE

And, if I'm trying to send the ldd command, I get this :

Quote:

Originally Posted by SSH

./mta_server: /lib/libstdc++.so.6: no version information available (required by ./mta_server)
libdl.so.2 => /lib/libdl.so.2 (0xb7efa000)
libxerces-c.so.27 => /usr/lib/libxerces-c.so.27 (0xb7a3f000)
libncurses.so.5 => /usr/lib/libncurses.so.5 (0xb79fd000)
libstdc++.so.6 => /lib/libstdc++.so.6 (0xb79bb000)
libgcc_s.so.1 => /lib/libgcc_s.so.1 (0xb79b3000)
libc.so.6 => /lib/libc.so.6 (0xb7886000)
libpthread.so.0 => /lib/libpthread.so.0 (0xb7870000)
libm.so.6 => /lib/libm.so.6 (0xb784e000)
/lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0xb7f04000)

What's the problem ?

Thanks for your helping !

chrislabricole · 01-20-2009, 12:12 PM

Please help me

chrislabricole · 01-29-2009, 06:20 AM

I still didn't the answer

JulianTosh · 01-29-2009, 06:44 AM

The guy above already answered the question, but I'll rephrase it incase there's a language problem... And boost my post count!

Quote:

Originally Posted by chrislabricole

What it's this symbolic link ??
How to make it ?

Thanks by advance,
Regards.

A symbolic like is like a shortcut except that it's more 'real-time'. It allows you to make a directory appear that really is just a link to a directory somewhere else on the partition.

You can make a symlink with the 'ln -s <existing file/dir> <symbolic link name>' command