ldd shows "Unresolved symbol" for libpthread.sl

[Joost Bijen]

Hi,

Do I have a faulty installation of my system when ldd gives me the following output?

/usr/lib>ldd libpthread.sl
/usr/lib/dld.sl: Unresolved symbol: symbol not found: __errno (libpthread.sl)

I have:
lrwxr-xr-x 1 root root 21 Feb 1 2006 libpthread.sl -> /usr/lib/libpthread.1

and did:

/usr/lib>what libpthread.sl
libpthread.sl:
Pthread Interfaces
$Revision: libpthread.1: @(#) depot-32pa R11.11_BL2003_1209_2 PATCH_11.11 PHCO_29960 Tue Dec 9 01:51:37 PST 2003 $
/usr/lib>what libpthread.1
libpthread.1:
Pthread Interfaces
$Revision: libpthread.1: @(#) depot-32pa R11.11_BL2003_1209_2 PATCH_11.11 PHCO_29960 Tue Dec 9 01:51:37 PST 2003 $

Thanks,
Joost

[Dennis Handly]

>Do I have a faulty installation of my system when ldd gives me the following output?

No, it is illegal for you to use that command and expect it not to have those unsats. __errno is defined in libc.

What is your real problem?
The latest libptread patch is PHCO_33282.

[Joost Bijen]

Dennis,

My problem is the integration of Sybase and Tuxedo libraries (for HP-UX 11.11) in a single shared library (to be used by the Sybase e-Biz Impact engine).

At run-time the following messages are logged:

082857.hqbrl02!?proc.17546.7.1: GP_CAT:1346: ERROR: pif: can't get address for EntryPoint '_ep_dl_instantiate' (impl 'registry.sl')
082857.hqbrl02!?proc.17546.7.1: GP_CAT:1346: ERROR: pif: can't get address for EntryPoint '_ep_dl_instantiate' (impl 'registry.sl')
0

I expect the problem to be in the Tuxedo area or the way I compile/link but I am not sure.

The Tuxedo Administrator took a look at my system (of which I am not root but developer) and noticed that ldd gave this error. He tried it at his own HP-UX box and the error was not shown. His conclusion was that I had a "not-well-maintained" system.

Regards,
Joost

BTW, I do not really understand your answer about 'the command being illegal for me'. If __errno is specified in libc, why does ldd mention it?

[Dennis Handly]

>At run-time the following messages are logged:
082857.hqbrl02!?proc.17546.7.1: GP_CAT:1346: ERROR: pif: can't get address for EntryPoint '_ep_dl_instantiate' (impl 'registry.sl')

It seem you want to look for _ep_dl_instantiate?

>He tried it at his own HP-UX box and the error was not shown. His conclusion was that I had a "not-well-maintained" system.

I just now tried it and I don't get that message for your version of libpthread either. About the only differences are in the versions of ldd that you and admin have. What are they?

I have B.11.53, PHSS_33035. While installing this may fix ldd, I'm not sure it will fix your Tuxedo issue, but it can't hurt. At least find out what your admin has.
The latest dld patch is PHSS_35381.

>I do not really understand your answer about 'the command being illegal for me'.

Without a close look, it seems to me you are debugging something like:
$ echo "Unresolved symbol:"

It prints message that looks like an error but it is just infomational.
My original comment was that using ldd that way is meaningless, you are misusing ldd. You should only use ldd on executables. But getting that message may be useless, so it may be a bug.

>If __errno is specified in libc, why does ldd mention it?

Because libpthread isn't linked with libc?

Since mine doesn't get that message it may be a cosmetic bug after all.