Bug#231024: libc6-dev: unresolved symbols for -ldl

[Neale Pickett <neale@rnd.watchguard.com>]

Daniel Jacobowitz <dan@debian.org> writes:

> You have somehow developed a copy of libdl.so in /usr/lib.  It's not
> the right copy; it looks to be from stable instead of unstable.  The
> right copy is in /lib.
>
> This has been happening to lots of people over the last six months and
> I have no )(!*&@ idea why!

I'd be happy to help you track it down, if you like.  We can talk on
IRC, I'm on freenode as neale.  Email is fine, too, but won't be as
quick.

I did indeed have a copy of libdl.so in /usr/lib:
    > pwd
    /fs/mama/usr/lib
    > ls -l libdl*
    -rw-r--r--    1 root     root        10752 Jan 20 09:29 libdl.a
    lrwxrwxrwx    1 root     root           20 Jan 23 11:08 libdl.so -> ../../lib/libdl.so.2

I renamed it and tried my compile again:
    > mv libdl.so libdl.so.dpkg-horked
    ~/tmp $ cc -o cftest cftest.c -ldl
    /tmp/cceQnY35.o(.text+0x20): In function `main':
    : warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
    ~/tmp $ ./cftest || echo gar
    ~/tmp $

So it looks as though that worked, although I'm baffled by it, since it
was a symlink to the one in /lib.  However, gcc still isn't happy about
something.  Both libc6 and libc6-dev are version 2.3.3ds1-11.

Thank you!

Neale