Re: ERROR: could not load library "...": Exec format error

Boszormenyi Zoltan írta:
> Korry Douglas írta:
>
>>> I have the $SUBJECT problem loading my own
>>> module in PostgreSQL. The server is HP-UX/ia64,
>>> PostgeSQL 8.4.2 was compiled with HP CC.
>>> pl/PgSQL can be loaded fine.
>>>
>>> ...:/usr/local/pgsql/pgsql-cc-8.4/lib# ldd odbclink.so
>>> libodbc.so.1 => /usr/local/pgsql/runtime/lib/libodbc.so.1
>>> libpthread.so.1 => /usr/lib/hpux64/libpthread.so.1
>>> libc.so.1 => /usr/lib/hpux64/libc.so.1
>>> libdl.so.1 => /usr/lib/hpux64/libdl.so.1
>>>
>>> "/usr/local/pgsql/runtime" is a link to "/usr/local/pgsql/pgsql-cc-8.4"
>>>
>>> ...:/usr/local/pgsql/pgsql-cc-8.4/lib# file plpgsql.so odbclink.so
>>> plpgsql.so: ELF-64 shared object file - IA64
>>> odbclink.so: ELF-64 shared object file - IA64
>>>
>>> The module compilation was done using "USE_PGXS=1 gmake".
>>>
>>> How can I solve this issue?
>>>
>> IIRC, HP/UX doesn't like to dynamic-load shared libraries that use
>> thread-local storage. Your shared library (odbclink.so) is linked
>> against libpthread.so.1 so you may be running into that problem. I
>> would recommend running the HP/UX equivalent of strace to capture more
>> information about the call to dlopen() (or perhaps shl_load(),
>> depending on which version of HP/UX you are using).
>>
>
> Yes, it seems you are right, I have read dlopen(3) in full on HP-UX,
> this small detail is documented there. It seems I need to preload
> the libraries: odbclink.so, libodbc.so.1 and all the needed libs from
> the target ODBC driver... Thanks for the info.
>

Actually, I experimented with a "threaded" PostgreSQL server,
I added LDFLAGS="-lpthreads" to the PG configure options
and suddenly my module that's linked to libraries also linked
with libpthread.so started working. The dlopen(3) man page
doesn't say this as a working constellation.

Best regards,
Zoltán Böszörményi

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----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
http://www.postgresql.at/