[PATCH] S390: Fix build with gcc configured with --enable-default-pie. [BZ #21537]

[Joseph Myers]

On Fri, 9 Jun 2017, Florian Weimer wrote:

> On 06/08/2017 02:02 PM, Stefan Liebler wrote:
> > Question about glibc configure flag --disable-hidden-plt:
> > Is this option supported or is it used by somebody?
> > It defines NO_HIDDEN which influences the definition of HIDDEN_JUMPTARGET.
> > I've tried to build glibc with this configure flag on s390, but it fails
> > due to several reasons.
> 
> I think we can remove --disable-hidden-plt.  It is broken on x86-64 as
> well, and I think the whole thing stopped working with PLT avoidance for
> hidden symbols in binutils and switching to namespace-clean names (which
> are generally hidden).

Do note however the unconditional definition of NO_HIDDEN in 
sysdeps/mach/hurd/configure.ac (and the corresponding comment pointing to 
a discussion of that).  We really need Hurd people to get current glibc 
working on Hurd without external patches and contribute 
build-many-glibcs.py support for it so it's possible to make sure changes 
don't break Hurd.

-- 
Joseph S. Myers
joseph@codesourcery.com