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Re: tst-prelink fails when built with -fPIC

From: Stefan Liebler <stli at linux dot vnet dot ibm dot com>
To: libc-alpha at sourceware dot org
Date: Wed, 21 Jun 2017 16:42:39 +0200
Subject: Re: tst-prelink fails when built with -fPIC
Authentication-results: sourceware.org; auth=none
References: <20161125102832.gcctvfrpr7yj6i3e@aurel32.net> <alpine.DEB.2.20.1611251717310.12591@digraph.polyomino.org.uk> <20161125181514.7jwlkbbra2ewgzr6@aurel32.net>

On 11/25/2016 07:15 PM, Aurelien Jarno wrote:

On 2016-11-25 17:20, Joseph Myers wrote:

On Fri, 25 Nov 2016, Aurelien Jarno wrote:

Hi all,

Debian builds gcc 6.2 with --enable-default-pie, which correspond to
always passing -pie -fPIE -fPIC. This causes the tst-prelink to fail on


Why -fPIC?  It's documented as -fPIE -pie, *not* -fPIC.


You are correct it's only -fPIE. Now using either -fno-PIE or -fno-PIC
makes the tst-prelink to pass. But -fno-PIE is the correct option here.

Now, -fPIE ends up with glibc building with -DPIC, and in some cases that
may break things if code isn't ready for PIC building outside shared
libraries.  Those cases can be fixed individually.


Indeed. I have already send a patch for x86-64, I am currently testing a
patch for s390.

Aurelien


Are there any news for this?

Bye.
Stefan

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