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I have some C++ code in place, which internally uses multiple third party libraries. The code compiles fine but during execution it is failing to load some shared library(libintbasic.so). Given the condition, I can not install any library into the system, the only way out is to find which function is calling that library. How could I find that out who is calling that library (my code does not call that directly).

ari
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I can not install any library into the system,

That appears to be a bogus claim: clearly you can copy your binary onto the system. Installing an additional library into the same directory is not much harder.

How could I find that out who is calling that library

There are two cases to consider:

  1. your binary or one of the libraries it is directly linked with links to libintbasic.so. Your binary will not run at all, or
  2. your binary, or one of the libraries it is directly linked with calls dlopen("libintbasic.so",...) and fails when that dlopen fails.

Debugging the first case is often easiest by setting LD_DEBUG=files,libs. The dynamic loader will then tell you which libraries are being loaded, and why they are required.

Debugging the second case is easy with gdb: set a breakpoint on dlopen, and execute where and info shared commands every time the breakpoint is hit.

Employed Russian
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Remove the linking option -lintbasic, you will see all the functions that needs this library in the error messages. This is not clean but it should work fine.

Brahim
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  • Well, that's not really something which I wanted to do. I want to get rid of those functions which is calling that. I want to find out those functions. – ari May 27 '15 at 15:01
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You may use ldd utility recursively for find all dependencies between shared libraries.

The following link also may be useful: Does ldd also show dependencies of dependencies?

Andrey Neyvanov
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    Welcome to Stack Overflow! Whilst this may theoretically answer the question, [it would be preferable](//meta.stackoverflow.com/q/8259) to include the essential parts of the answer here, and provide the link for reference. – Mat Oct 24 '18 at 08:53