Latest LQ Deal: Latest LQ Deals
Go Back > Forums > Linux Forums > Linux - General
User Name
Linux - General This Linux forum is for general Linux questions and discussion.
If it is Linux Related and doesn't seem to fit in any other forum then this is the place.


  Search this Thread
Old 08-01-2006, 03:49 AM   #1
LQ Newbie
Registered: Jan 2005
Posts: 1

Rep: Reputation: 0
Problem in using both load time linking and runtime linking

Hi All,

I have a small shared library file named

I have written a small program to load this library in runtime
using dlopen, dlclose etc. In that program I open that library using
dlopen once and close that library twice using dlclose.

So, when I compile the program normally, gcc test.c -ldl, it is
working fine. It is printing dlerror message when it is executing
dlclose second time.

But, when I compile the program with load time linking also, gcc
test.c -L<somedir> -ldl -ltest1, 2nd dlclose is also working fine in
some systems with out any error message from dlerror function. I have
tested this program in 2 linux systems. In RHEL AS Release 4, KERNEL:
2.6.9-34.0.2.EL , it is printing dlerror after 2nd dlclose [This is
what I have expected]. But in Suse 8.1, KERNEL: 2.4.21-138-default,
even the 2nd dlclose result is SUCCESS.

I dont know how system handles if load time linking and runtime
linking is done on the same libraries. If you know it, please explain

If anyone of you have faced this kind of problem earlier and solved
them, please help me.

This is the C Program that I have written.
int main(int argc,char* argv)
void* handle_test1=dlopen("",RTLD_NOW|RTLD_GLOBAL);
printf("Test1 Error\n");
printf("test1 open is succesful\n");

int close_val=dlclose(handle_test1);
printf("test1 close#1 is %d , %s \n",close_val,dlerror());
printf("test1 close#2 is %d , %s \n",close_val,dlerror());

Thank you
Durga Prasad



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Linking Problem I think? gplacek Linux - Software 10 08-13-2004 07:01 PM
ld linking problem captain-mythos Linux - Software 1 06-20-2004 08:46 AM
C++ Linking Problem acjt Programming 4 01-31-2004 08:48 AM
Problem linking Red Guy Programming 1 02-07-2003 03:52 AM
linking problem with ld ! gluon Programming 2 05-19-2002 01:59 PM > Forums > Linux Forums > Linux - General

All times are GMT -5. The time now is 10:22 PM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration