how to make the libdl.sl library available to ld

[Patrice Bedard]

Hi,
I'm trying to build an application on HP-UX but I have problems at the linking step:

libc.2
-n Checking glibc subversion...
gcc -Wall -c -D_GNU_SOURCE -DPIC -fPIC -D_REENTRANT -DVERSION=\"0.6.2\" installwatch.c
ld -shared -o installwatch.sl installwatch.o -ldl -ldld -lc
ld: Can't find library for -ldl
*** Error exit code 1

Anyone can help me ?

Thanks in advance,

Pat

[Mike Stroyan]

The only libdl.sl on HP-UX 11.00 and 11.11 is for 64-bit code. dlopen and related functions found in the 64-bit libdl.sl are available in up to date patches of the 32-bit libc.sl.

[Patrice Bedard]

Thanks for your reply. So youb are suggesting that I install the necessary patchs for the 32bits version of libc ? right ?

Or are you suggesting that if I try to compile the application wat 64bits it would work without patching ?

Thanks in advance for your precision.

Pat

[Mike Stroyan]

I misspoke in saying libc. The dlopen function is in libdld for 32-bit. The current patch with dlopen in that library is PHSS_28434. The first
patch with that in was back in May of 2000. There are plenty of reasons to have at least that new of a linker and loader patch. The current patch is available from
http://www2.itrc.hp.com/service/patch/patchDetail.do?patchid=PHSS_28434

I would favor using 32-bit libdld and a new enough patch level. If you had some other reason to switch to 64-bit mode, then you would use libdl. If you don't want to require any patches on 11.00 you could also chose to change the code to use the shl_load function and related functions instead of dlopen.

[Patrice Bedard]

Again, thanks for your help.

I'm trying to install the patch you refered me too and it seems like this patch isn't for 11i. I haven't found other patches specific to HP-UX 11.11 .Here is the log:

[qcashp02@root]: swinstall -s /tmp/LDDpatch/depot PHSS_28434

======= 07/09/03 09:31:00 EDT BEGIN swinstall SESSION
(non-interactive) (jobid=qcashp02-0019)

* Session started for user "root@qcashp02".

* Beginning Selection
* Target connection succeeded for "qcashp02:/".
* Source connection succeeded for
"qcashp02:/tmp/LDDpatch/depot".
ERROR: Could not apply the software selection "PHSS_28434" because
there are no product variations that are compatible with the
destination host(s).
* Software selection failed for "qcashp02:/tmp/LDDpatch/depot".
ERROR: No software has been selected.
ERROR: Cannot continue the "swinstall" task.
* Selection had errors.



======= 07/09/03 09:31:02 EDT END swinstall SESSION (non-interactive)
(jobid=qcashp02-0019)

Thanks for you help!

Pat

[Manuel Plaza]

Hi Pat,

We have /usr/lib/libdld.sl linked to /usr/lib/libdld.2

Regards,

Manuel

[Patrice Bedard]

Hi,
we have it too. But the linker is still complaining, maybe I'm just using the wrong linker options ??

Pat

[Manuel Plaza]

And, have you correctly defined the "SHLIB_PATH" variable ?

Regards,

Manuel

[Mehdi_1]

Hi Pat

What system have you got?

in my IA64 platform they are inside:

/usr/lib/hpux32/libdl.so
/usr/lib/pa20_64/libdl.sl
/usr/lib/hpux64/libdl.so


__Mehdi

[Mike Stroyan]

The most recent linker tools patch for 11.11 is PHSS_26560. You say the linker is complaining, but it is not clear which complaint it makes. Have you removed '-ldl' from the link line, as you should for a 32-bit link?
Is ld complaining about missing symbols?