ldconfig: unable to add libraries

samrat_rao · 08-10-2011, 12:19 AM

Hi,

I am using CentOS 6.0 i686.

I need to use a precompiled binary ferret http://ferret.pmel.noaa.gov/static/D...downloads.html for my work. Unfortunately it is available for RHEL 5 only.

It would work if i had some compatibility libraries installed. I found fortran compatibility libs. But i couldn't find libcurl.so.3.

Creating a symlink /usr/lib/libcurl.so.3 to the existing libcurl.so.4.1.1 in /usr/lib made ferret work.

I do not want to make changes in /usr/lib and so i created a symlink libcurl.so.3 in /usr/lib/pkgs/libs to /usr/lib/libcurl.so.4.1.1. Then as root i created a file userlibs.conf in /etd/ld.so.conf.d with these lines:

Code:

# List of user libs

/usr/local/pkgs/libs

and then ran ldconfig.

But i saw no change as still invoking ferret registered a missing libcurl.so.3 message.

I tried a couple of things like

Code:

ldconfig -n /usr/local/pkgs/libs
ldconfig -l /usr/local/pkgs/libs

but nothing happened.

I am using only CentOS 6 repos since to ensure stability it is not advisable to use non-CentOS repos unless one really knows his stuff.

Could someone suggest what should be my next step?

Thanks.

Tinkster · 08-10-2011, 12:27 AM

You could try invoking ldconfig with -v to make it verbose.

kirukan · 08-10-2011, 12:28 AM

Quote:

/etc/ld.so.conf.d/

For example i used to add mysql libraries as follows,
The above mentioned path create a file "mysql" and add the path where the mysql libraries exist

samrat_rao · 08-11-2011, 04:19 AM

Hi mod,

As root - append line /usr/local/pkgs/libs in /etc/ld.so.conf.d/userlibs.conf. Then

Code:

cd /usr/local/pkgs/libs
ln -s /usr/lib/libcurl.so.4.1.1 libcurl.so.3
ldconfig -v | more

Output:

Quote:

ldconfig: /etc/ld.so.conf.d/kernel-2.6.32-71.el6.i686.conf:6: duplicate hwcap 0 nosegneg

<snip>

/usr/local/pkgs/libs:
libcurl.so.4 -> libcurl.so.3 (changed)

<snip>

Code:

ls -l /usr/local/pkgs/libs

Output:

Quote:

total 0
lrwxrwxrwx. 1 root root 25 Aug 11 14:28 libcurl.so.3 -> /usr/lib/libcurl.so.4.1.1
lrwxrwxrwx. 1 root root 12 Aug 11 14:41 libcurl.so.4 -> libcurl.so.3

The boot kernel is the upgraded 2.6.32-71.29.1.el6.i686 and not 2.6.32-71.el6.i686.

This thing had repeatedly happened before and i didn't understand why this was happening. I thought i was making a mistake. So i posted here.

Hi Kirukan,

Creating a separate /etc/ld.so.conf.d/libcurl.conf with the entry /usr/local/pkgs/libs repeats the action mentioned above.