lintian-info gives info about the lintian errors
(you can also find them somewhere on the Web, but i forgot where):
user$ lintian-info -t hardening-no-relro
W: hardening-no-relro
N:
N: This package provides an ELF binary that lacks the "read-only
N: relocation" link flag. This package was likely not built with the
N: default Debian compiler flags defined by dpkg-buildflags. If built
N: using dpkg-buildflags directly, be sure to import LDFLAGS.
N:
N: Refer to
http://wiki.debian.org/Hardening for details.
N:
N: Severity: normal, Certainty: certain
N:
N: Check: binaries, Type: binary, udeb
N:
lintian-info -t option means --tags
man dpkg-buildflags looks promising. Like simply editing a config file for the flags.
As you can see: They often are cryptic.
I never heard of dpkg-buildflags before. I would look at the original Makefile and at debian/rules (but as dh_make created it, it should be default).
I think the best bet you got is ask the developer of the package. You also could try debian-mentors IRC channel.
As far it's me that looks like a high-level question.