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Re: test-rwlock1 failing on latest Fedora Rawhide

From: Bruno Haible
Subject: Re: test-rwlock1 failing on latest Fedora Rawhide
Date: Wed, 23 Jan 2019 21:01:19 +0100
User-agent: KMail/5.1.3 (Linux/4.4.0-141-generic; KDE/5.18.0; x86_64; ; )

Hi Rich,

> I cannot reproduce this locally, hence my bug report is rather devoid
> of details.  However, it's 100% reproducible in Koji (the Fedora
> Rawhide build system) on *all* architectures except armv7:
> FAIL: test-rwlock1
> ==================
> Unexpected outcome 3
> FAIL: test-thread_create

As written in [1]:
"Unexpected outcome 3" means that the test program could not create a second
thread (other than the main thread).

On glibc systems, this typically means that the 'test-rwlock1' program has not
been linked with '-lpthread'.

> The full log is here:
> https://kojipkgs.fedoraproject.org//work/tasks/4382/32214382/build.log

The configure command-line looks right.

I see
  LDFLAGS='-Wl,-z,relro -Wl,--as-needed  -Wl,-z,now 

A global "-Wl,--as-needed" has the effect of removing libraries like
-lpthread from the link. Which would explain the symptom.

What do the other elements of LDFLAGS do?


[1] http://lists.gnu.org/archive/html/coreutils/2018-02/msg00020.html

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