CODEWITHSUNDEEP
c++clibraries
Urquhart
Urquhart

Reputation: 137

Show path of library that ld found through -l

Is it possible to make g++/ld show the absolute path of the library, that a -l option has been resolved to? In my case I am trying to link the lrs library through -llrs and I suspect that it resolves to /usr/lib/liblrs.so but I want to be sure.

Upvotes: -1

Views: 735

Answers (1)

Mike Seeds
Mike Seeds

Reputation: 400

ELF files do not include an absolute path to the shared library. That is the job of the dynamic linker. You can confirm this by running. strings executable | grep libname. The shared library can be anywhere on the linker search path.

readelf -d executable

To test the behaviour of the dynamic loader use ldd (List Dynamic Dependencies)

Example below with /bin/bash

ldd /bin/bash

libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6

You may also want to follow symlinks

ls -al /lib/x86_64-linux-gnu/libc.so.6

lrwxrwxrwx 1 root root 12 Feb 5 2019 /lib/x86_64-linux-gnu/libc.so.6 -> libc-2.23.so

Upvotes: 1

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