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Old 11-20-2008, 12:36 AM   #1
Registered: May 2008
Posts: 227

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I'm having trouble running a program that I compiled that uses a dynamically linked library in /usr/local/lib. I've even compiled it with the -L/usr/local/lib flag, but when I ldd the executable it doesn't find the library.

Apparently the library directory isn't in LD_LIBRARY_PATH. I've read it's a bad idea to modify LD_LIBRARY_PATH, but how else can I specify the library location?


Last edited by galapogos; 11-20-2008 at 12:47 AM.
Old 11-20-2008, 12:42 AM   #2
Registered: Nov 2008
Location: Lower Saxony, Germany
Distribution: CentOS, RHEL, Solaris 10, AIX, HP-UX
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export LD_LIBRARY_PATH=/usr/local/lib:${LD_LIBRARY_PATH}

this will be the easiest way.

Best way IMHO is create a short shellscript which sets LD_LIBRARY_PATH than executes your program and after you close unset LD_LIBRARY_PATH.

For static solution you can put /usr/local/lib in /etc/ and run ldconfig.
Be careful this solution can break other library dependencies on your system.
Old 11-21-2008, 08:48 AM   #3
Registered: Jun 2003
Location: Washington
Distribution: Raspbian, Ubuntu, Chrome/Crouton
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To permanently set it for all users.

$ su -
# cd /etc/
# echo /usr/local/lib >local.conf
# exit

When you re-boot, the default LD_LIBRARY_PATH will include /usr/local/lib
Old 11-21-2008, 09:25 AM   #4
Gentoo support team
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To wrap everything into a simple script is the easiest you can get. It's a non-invasive solution that won't cause trouble with the rest of your system.


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