Dependency Walker for ubuntu

Question

Is there a tool like Windows DependencyWalker for Ubuntu ? I would like to see all shared libraries my executable depends on.

Answer 1

In a terminal, execute:

ldd /path/to/your_executable

Example:

~$ ldd /bin/ls
        linux-vdso.so.1 =>  (0x00007fff78fea000)
        libselinux.so.1 => /lib/libselinux.so.1 (0x00007f1940858000)
        librt.so.1 => /lib/librt.so.1 (0x00007f1940650000)
        libacl.so.1 => /lib/libacl.so.1 (0x00007f1940447000)
        libc.so.6 => /lib/libc.so.6 (0x00007f19400c4000)
        libdl.so.2 => /lib/libdl.so.2 (0x00007f193fec0000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f1940a99000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00007f193fca2000)
        libattr.so.1 => /lib/libattr.so.1 (0x00007f193fa9d000)

Answer 2

ldd only shows which shared libraries the given executable depends on, but – much unlike Dependency Walker – it does not show you the symbols (e.g. functions) that are imported from each shared library. If you want to know which symbols an executable (or shared library) imports, you can use nm with options -D --undefined-only. This still does not tell you which specific functions are imported from which specific library. There is a script that can do this, though:

https://github.com/dEajL3kA/dependencies.py

Note: You may want to use option --recursive to also resolve indirect decencies! This will give you a "hierarchical" view of the dependencies, sort of what Dependency Walker does.

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lddtree, available from the pax-utils package, provides a "tree" view of ldd output.