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Date: Thu, 28 May 2020 15:20:46 -0400
From: Jeffrey Walton <>
Subject: Re: Shared library loading

On Wed, May 27, 2020 at 2:10 PM Dmitry Samersoff <> wrote:
> > The "b" library loading works on my Ubuntu 19.10 and
> > fails on Alpine 3.11.6 with message: > dlopen failed: Error loading shared library No such file or
> > directory (needed by /root/load-lib-sample/bin/b/
> > Should it work on Alpine with musl libc as well?
> 1. You explicitly load library with a path (.../
> 2. You are explicitly loading another library (.../
> 3. Linker find in the appropriate section of and
> attempts to load it from syspath (LD_LIBRARY_PATH etc)
> 4. Linker doesn't find it. Musl return error on this step but glibc and
> BSD go further.
> 5. Linker compares short names of already loaded library and the
> required one
> 6. It matches, so Linker decides to resolve
> I didn't find any specification that dictates one or other behavior, so
> it could not be considered as a bug.

I believe Drepper's DSO HowTo specifies the behavior for Linux.

Also see


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