Re: [Openexr-user] libstdc++.so.5 not found

[Klaus Steden]

> > > Hello,
> > >
> > > I think I have managed to compile Openexr under Redhad 9 however I'm 
> > > having problems running the "exrdisplay" program. When I run it I get 
> > > the following error: .../libstdc++.so.5: version `GLIBCPP_3.2.2' not 
> > > found (required by /usr/local/lib/libIlmImf.so.2)
> > >
> > > I noticed that it works fine when I'm root.
> > >
> > > Any ideas? thanks
> > Linux has all sorts of funkiness with libc and libc++ versions that I 
> > find it difficult to keep them clear between versions.
> >
> > I'd suggest installing any of the available compat-libstdc++ RPMS and 
> > giving it another go ... if they're already installed, check the output 
> > of 'ldd' as root and as your user, and see which library file it loads 
> > when it works - and check that file's permissions. You may also have to 
> > rebuild your dynamic loader's cache using the 'ldconfig' command.
> >
> > hth, Klaus
> Hi Klaus,
>
> thanks for your help.
> I tried 'ldd' and yes, 'exrdisplay' is actually calling a different version 
> of libstdc++.so.5 when i'm root which is located in /usr/lib.
>
> This is the output from ldd:
> From root:
> ..
> libstdc++.so.5 => /usr/lib/libstdc++.so.5 (0x40360000)
> ...
>
> From user:
> ..
> libstdc++.so.5 => 
> /usr/Softimage/XSI_4.2/Application/mainwin/mw/../misc/linux/gcc/fixed3/lib/libstdc++.so.5 
> (0x40360000)
> ..
> Do I have to reinstall openexr with some different options to make sure that 
> I use the this library as a user? Why would it use this library and not the 
> one in /usr/lib?
Usually, 'ldconfig' (at least, I'm assuming you're on a system with that 
facility) takes care of such things. However, it is always possible to 
alter the behaviour of the runtime loader using either of the LD_PRELOAD 
or LD_LIBRARY_PATH (or optionally on IRIX - LD_LIBRARYN32_PATH) 
environment variables.

I would surmise that by the presence of an XSI path in your ldd output, 
your normal user account uses the LD_LIBRARY_PATH variable, and places the 
path to the libstdc++.so.5 that comes bundled with XSI earlier in the path 
than /usr/lib; not so with root, which is why it works for root.

It may not be the XSI environment - so don't necessarily point the finger 
at that application - but I'd be fairly willing to believe that your 
normal user account sets LD_LIBRARY_PATH, and that's the source of the 
discrepancy.

hth,
Klaus