Hi, I have a small problem. Considering 3 files: prog, liba.so, b.so in the same directory.

prog - program, which dlopens b.so
b.so - library, which is linked to the liba.so
liba.so - some library in user directory

All goes ok when I run it like this:
$ LD_LIBRARY_PATH=. ./prog

But I'd like to use only
$ ./prog
So before calling
dlopen("./b.so", RTLD_LAZY)
I set LD_LIBRARY_PATH:
setenv("LD_LIBRARY_PATH", ".", 1) /or putenv("LD_LIBRARY=.")/

But it didn't help. I successfully checked, if environment variable is set well via system("echo $LD_LIBRARY_PATH"). I watched strace and I can see there, that dlopen doesn't try to find liba.so in current directory.

Any clue?

Try this (needs to be done each time you start up):I've run into the same problem; this adds all libs in . to /etc/ld.so.cache.
ta0kira

PS Or just 'ldconfig' after changing LD_LIBRARY_PATH.

Thanks,

but I want to change my source so that I don't need to run special commands (like ldconfig) or do specific settings (like LD_LIBRARY_PATH).

I know, I can run the program via some script which set the LD_LIBRARY_PATH, but I'm looking for solution, how to change the program source code.

Please look at this thread:
http://www.linuxquestions.org/questi...d.php?t=408083

or this link:
http://www.tldp.org/HOWTO/Program-Li...libraries.html

Cheers!

paulsm4; Is this sort of what you are talking about (in the context of the binary using the lib)?:

1) remove calls to dlopen, etc.
2) #include a header file with the function declarations used from the shared lib
3) use the functions by name
4) -L the current path and -l the actual libs at link time

I'm not sure if that's what you were thinking of, but it just came to me when I looked through the LQ post you linked to. I suppose you would still need to use ldconfig or LD_LIBRARY_PATH, though.
ta0kira

paulsm4: Thanks, now it works exactly like I need. I guessed that it is somehow possible to store path to libraries in target ELF, but not found it. I looked once more to tldp.org and see the solution.

Now I compile it like this:

Important is -Wl part of parameters.
Thanks