[v3] use -Wl,-z,relro if possible

[Paolo Carlini]

Benjamin Kosnik wrote:

>I tested with:
>
>GNU ld version 2.15.92.0 20040927
>GNU ld version 2.15.94.0.2.2 20041220
>GNU ld version 060113 20060113
>GNU ld version 2.16.1
>
>Cannot reproduce... I don't see any new fails on gcc-testresults.
>
>Can you double check? If there's something wrong, I'd like to do
>something more sane then the following to disable...
>  
>
Thanks Benjamin for your quick feedback. Indeed, I see that testresults
are clean.

However, for some reason, I can definitely reproduce, once more moments
ago, also many failures in 22_locale. Totally broken.

Wrt testresults, I'm building --disable-bootstrap and I'm wondering
whether it's a miscompilation of sort: right now I'm in the middle of a
default build, complete bootstrap. Maybe you can try --disable-bootstrap...

Annoying...

Thanks,
Paolo.