How to check which libraries does a program use?

sceadu · 12-27-2004, 01:10 AM

Hi,
I like to find out which library does a particular program use.

I have tried nm and ld but they seem to be unable to list out the libraries.

Please assist.

itsme86 · 12-27-2004, 01:17 AM

Use the ldd command on the program to list its library dependencies.

sceadu · 12-27-2004, 02:46 AM

Thanks.

The program is "helloworld.o" and when I try "ldd helloworld.o" . An error message "you do not have execution permission for ./helloworld.o not dynamic executable" appears.

Please assist.

Marius2 · 12-27-2004, 02:52 AM

Do it as root.

leonidg · 12-27-2004, 03:00 AM

You should check the executable file (a.out for example) and not the object

sceadu · 12-27-2004, 03:09 AM

Sorry that I didn't gave this information early.

I wrote helloworld as a kernel program.

Hko · 12-27-2004, 04:46 AM

Quote:

Originally posted by sceadu Sorry that I didn't gave this information early.

I wrote helloworld as a kernel program.

Then you'll need to run it as such...

sceadu · 12-27-2004, 07:39 PM

Hi,

Thanks for all the help. My apologises about insufficient information.

Here's the details.

The helloworld program is written to be ran as a kernel program in a stripped down linux (Trinux).

In this stripped down linux, there is no libraries and lsmod shows no module loaded.

Therefore, in order to run the helloworld program that contains "printk" and netfilter commands, I have to load in the appropriate libraries.

Hence, the question on how to check which libraries does a program use.

Please advise.