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Re: Undefined use of weak symbols in gnulib

From: Ben Pfaff
Subject: Re: Undefined use of weak symbols in gnulib
Date: Wed, 28 Apr 2021 23:33:07 -0700

On Wed, Apr 28, 2021 at 7:40 AM Bruno Haible <bruno@clisp.org> wrote:
> So, in the normal cases (link with '-lpthread', link without '-lpthread',
> and even with dlopen()), everything will work fine. The only problematic
> case thus is the the use of LD_PRELOAD. Right?
> I think few packages in a distro will be affected. And few users are
> using LD_PRELOAD on their own, because since the time when glibc
> started to use 'internal' calls to system calls where possible, there
> are not a lot of uses of LD_PRELOAD that still work.

One important use of LD_PRELOAD is for the "fakeroot" program that
Debian and derived distributions tend to use to build packages.  I haven't
followed along carefully enough to know whether this is likely to cause
problems for what we're talking about now.

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