Perl CFLAGS and LDFLAGS change

[Petr Pisar]

On Wed, Jul 15, 2015 at 05:02:42PM +0200, Petr Pisar wrote:
> On Wed, Jul 08, 2015 at 02:25:11PM +0200, Petr Pisar wrote:
> > You could read
> > <http://permalink.gmane.org/gmane.linux.redhat.fedora.devel/208954> about
> > poor implementation of Fedora 23 hardening feature.
> > 
> > It turned out that perl is broken too. Fortunately, only /usr/bin/perl is
> > broken. Not the libperl.so or any other XS modules. This issue is known as
> > <https://bugzilla.redhat.com/show_bug.cgi?id=1238804>.
> > 
> > Playing with perl's Configure arguments shows different options are used
> > at different places and the best configuration looks like this (from
> > perl.spec):
> > 
> > -/bin/sh Configure -des -Doptimize="$RPM_OPT_FLAGS" \
> > -        -Dccdlflags="-Wl,--enable-new-dtags" \
> > -        -Dlddlflags="-shared $RPM_OPT_FLAGS $RPM_LD_FLAGS" \
> > +# ldflags is not used when linking XS modules.
> > +# Only ldflags is used when linking miniperl.
> > +# Only ccflags and ldflags are used for Configure's compiler checks.
> > +# Set optimize=none to prevent from injecting upstream's value.
> > +/bin/sh Configure -des \
> > +        -Doptimize="none" \
> > +        -Dccflags="$RPM_OPT_FLAGS" \
> > +        -Dldflags="$RPM_LD_FLAGS" \
> > +        -Dccdlflags="-Wl,--enable-new-dtags $RPM_LD_FLAGS" \
> > +        -Dlddlflags="-shared $RPM_LD_FLAGS" \
> > 
> The change is in repositories and although almost everything works, we started
> to get strange failures:
> 
> perl-Algorithm-CurveFit (bug #1242769), a pure Perl code, fails a test on
> x86_64 only.
> 
> perl-smartmatch-engine-core (bug #1242802), an XS code which I retired,
> segfaults.
>
Also perl-PDL-Graphics-PLplot segfauls on x86_64.

I decided to disable hardening in perl.spec. Once the root cause is found
and fixed, I will enable it again.

-- Petr
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