Subj : How to find an application is built with LinuxThreads/NPTL ?
To   : comp.programming.threads
From : karthikd22
Date : Thu May 19 2005 07:30 am

Hello All,

I am a newbie to multi-threaded application programming/debugging.
However, I have some basic knowledge of thread programming.

I have heard about LinuxThreads and NPTL. While debugging
multi-threaded applications(for which I don't have the source code) for
any crashes/core dumps, gdb used to show the following message in the
startup:

Using host libthread_db library "/lib/tls/libthread_db.so.1"

and an error message :

Program received signal SIGABRT, Aborted.
0xb70c2cef in raise () from /lib/tls/libc.so.6

After a bit of googling, I found that setting environment variable
LD_ASSUME_KERNEL to 2.4.1 solved this problem and I could debug the
program correctly.

Using the following command, I found the system I ran this program uses
NPTL:

$`ldd /bin/ls|grep libc.so.6|cut -d ' ' -f 3`|egrep -i
'linuxthreads|nptl'

NPTL 0.60 by Ulrich Drepper

My question is, is there a way to find out whether an application is
built with LinuxThreads or NPTL? Would 'ldd' command on the binary or
shared library would help?

Sorry, if this question is not a relevant post to this newsgroup.

Thanks & Regards,
Karthik

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