-lnsl static on hpux11 cause a core dump

[Fourdan]

Hi all,

When using gethostbyname() on HP-UX 11 within a statically linked application (or dynamically with dld only) the program cores.

However, compiling with nsl linked dynamically, the program works fine. Unfortunately, this doesn't seem to be an option as static linking is required as much as possible (for various reasons that I won't enumerate here)

So my question:

- Why static linking causes a core?
- Why does this used to work with hpux 10.20?
- How can I avoid this w/out using dynamic linking on hpux11?
- And finally, if this is unavoidable, could someone point me to some documenation that clearly explain why so I can report this?

Thanks in advance for your help,

Best regards,
Olivier.

[Steven E. Protter]

You might want to consider finding out what the real problem is.

In the script, add this code:

pid=$$
TF="${TRACE_FILE}.${pid}.dat"
export TF
/usr/contrib/bin/tusc -o $TF -f -p $pid &

This will initiate a tusc trace including forks on the process. Find out why you are getting a core. Maybe it has nothing to do with the OS upgrade.

OS's change, there are valid reasons for that.

Here is a link for tusc:

http://hpux.connect.org.uk/hppd/hpux/Sysadmin/tusc-7.5/

SEP

[Fourdan]

Hi Steven,

Thx for your reply. Actually, the problem seems to be known (by looking at various forum archives), but I couldn't find the fix or an explanation of why dynamic linking of nsl is required on hpux11.

As for the cause, it occurs in the nsl library as shown by the debugger.

I attach a very simple test program that exhibits the described behavour.

Cheers,
Olivier.

[ranganath ramachandra]

i could not reproduce this on a 11.00 machine with PHNE_20371.

[ranganath ramachandra]

i'm sorry that should be PHNE_24909 .

[Fourdan]

Hi,

Sorry, I didn't mention, I'm running 11.11.

Looks like the patch equivalent for 11.11 is PHNE_29211, most recent being PHNE_29783.

I'll give that a try :) If it fixes the issue, I'll definitely post the result on this thread.

Thanks,
Olivier.

[rick jones]

I cannot speak directly to the reason for the core, but can say this.

At time has passed, and as time continues to pass, the ability to link applications staticly will diminish.

It would be good to start taking a closer look at the unenumerated reasons and see if something can be done about them.