error while loading shared libraries: libstdc++.so.5: wrong ELF class: ELFCLASS64

permalac · 05-05-2009, 06:15 AM

We just reinstalled a server from ubuntu 7.10 to 8.04 and there is some execs wich don't work.

Symmetrize

Quote:

varoitus# /home/rafael.banchs/ACL09/EUPARL/tools/symmetrize -d
/home/rafael.banchs/ACL09/EUPARL/tools/symmetrize: error while loading shared libraries: libstdc++.so.5: wrong ELF class: ELFCLASS64

The ldd don't found the libraries:

Quote:

varoitus# ldd -d /home/rafael.banchs/ACL09/EUPARL/tools/symmetrize
undefined symbol: _ZSt4cout, version GLIBCPP_3.2 (/home/rafael.banchs/ACL09/EUPARL/tools/symmetrize)
undefined symbol: _ZSt4cerr, version GLIBCPP_3.2 (/home/rafael.banchs/ACL09/EUPARL/tools/symmetrize)
undefined symbol: _ZNSs20_S_empty_rep_storageE, version GLIBCPP_3.2 (/home/rafael.banchs/ACL09/EUPARL/tools/symmetrize)
linux-gate.so.1 => (0xffffe000)
librt.so.1 => /lib32/librt.so.1 (0xf7fc1000)
libstdc++.so.5 => not found
libm.so.6 => /lib32/libm.so.6 (0xf7f9b000)
libgcc_s.so.1 => not found
libpthread.so.0 => /lib32/libpthread.so.0 (0xf7f83000)
libc.so.6 => /lib32/libc.so.6 (0xf7e34000)
/lib/ld-linux.so.2 (0xf7fd2000)

But there are in the box:

Quote:

varoitus# locate ibstdc++.so.5
/opt/quest/lib64/support/libstdc++.so.5
/opt/quest/lib64/support/libstdc++.so.5.0.3
/usr/lib/libstdc++.so.5
/usr/lib/libstdc++.so.5.0.7
/usr/lib32/libstdc++.so.5

Many thanks

ilikejam · 05-05-2009, 07:44 AM

Hi.

If you can recompile symmetrize and include /usr/lib32 in the libraries path, then do that.
Otherwise add /usr/lib32 to /etc/ld.so.conf, then run 'ldconfig' as root.

Dave

permalac · 05-05-2009, 09:57 AM

Thanks, but it's my first time with ldconfig and I don't get it. :/

Code:

varoitus# whoami 
root

Code:

varoitus# /home/rafael.banchs/ACL09/EUPARL/tools/symmetrize
/home/rafael.banchs/ACL09/EUPARL/tools/symmetrize: error while loading shared libraries: libstdc++.so.5: wrong ELF class: ELFCLASS64
varoitus# ldd /home/rafael.banchs/ACL09/EUPARL/tools/symmetrize
	linux-gate.so.1 =>  (0xffffe000)
	librt.so.1 => /lib32/librt.so.1 (0xf7fcb000)
	libstdc++.so.5 => not found
	libm.so.6 => /lib32/libm.so.6 (0xf7fa5000)
	libgcc_s.so.1 => not found
	libpthread.so.0 => /lib32/libpthread.so.0 (0xf7f8d000)
	libc.so.6 => /lib32/libc.so.6 (0xf7e3e000)
	/lib/ld-linux.so.2 (0xf7fdc000)

So, whats on ld.so.conf?

Code:

varoitus# cat /etc/ld.so.conf
include /etc/ld.so.conf.d/*.conf

And what's inside this *.conf

Code:

varoitus# cat /etc/ld.so.conf.d/*
# libc default configuration
/usr/local/lib
#luser libraries
/usr/lib
/usr/lib32
# Multiarch support
/lib/x86_64-linux-gnu
/usr/lib/x86_64-linux-gnu
varoitus#

vervose? looks fine , almost fine to me.

Code:

varoitus# ldconfig -v|grep libstdc++                           
/sbin/ldconfig.real: Path `/usr/lib' given more than once
/sbin/ldconfig.real: Path `/usr/lib32' given more than once
	libstdc++.so.5 -> libstdc++.so.5.0.7
	libstdc++.so.6 -> libstdc++.so.6.0.9

but it's not working, I've trying with links between libraries but I can not manage to make it work. Could you give me another tip?

Many thanks.

ilikejam · 05-05-2009, 10:59 AM

That all looks OK.

Does 'echo $LD_LIBRARY_PATH' output anything when you're logged in as whatever user you normally use?

Dave

ilikejam · 05-05-2009, 11:11 AM

Also, can you check that the ia32-libs package is installed? It probably is, since the /usr/lib32 directory has libraries in it, but worth checking.

Dave

permalac · 05-06-2009, 04:58 AM

Hey many thanks, it's working pretty well.

I've installed ia32-libs, that was missing and now it works.

On the other side, I haven't said that I had this trouble with another machine, and i've also installed ia32-libs but also needed to add a particular library to ld.so.conf.

And third, so far this has been a great thread to learn something very interesting about linux runtime libraries, many thanks to all of you.