Bug#710826: perl: relro linker flag not included in lddlflags

[Russ Allbery]

Package: perl
Version: 5.14.2-21
Severity: normal

I feel like I must be missing something, but as near as I can tell,
-Wl,-z,relro doesn't appear to be passed into Perl module builds by
default.  At least, it's not included in lddlflags, so I'm not seeing
it in a module that I'm building with Module::Build.

This module is embedded in another source package, so I'm doing some
odd things and I'm possibly missing something.  But when I dump the
values of %Config, I see:

config_arg4 = -Dldflags= -Wl,-z,relro
config_arg5 = -Dlddlflags=-shared -Wl,-z,relro

but:

ldflags =  -fstack-protector -L/usr/local/lib
lddlflags = -shared -L/usr/local/lib -fstack-protector

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 3.8-2-686-pae (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages perl depends on:
ii  libbz2-1.0    1.0.6-4
ii  libc6         2.17-3
ii  libdb5.1      5.1.29-5
ii  libgdbm3      1.8.3-11
ii  perl-base     5.14.2-21
ii  perl-modules  5.14.2-21
ii  zlib1g        1:1.2.8.dfsg-1

Versions of packages perl recommends:
ii  netbase  5.1

Versions of packages perl suggests:
pn  libterm-readline-gnu-perl | libterm-readline-perl-perl  <none>
ii  make                                                    3.81-8.2
ii  perl-doc                                                5.14.2-21

-- no debconf information