On tis, 2011-10-18 at 15:43 -0400, Tom Lane wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
> > Unfortunately, whether Tom's right or not, we still don't have a
> > solution to the compiler warning.
>
> I don't actually see that warning on my Fedora 15 machine, with
> gcc version 4.6.1 20110908 (Red Hat 4.6.1-9) (GCC)
>
> What are the people who do see it using?
>
> (I do see the -Waddress ones.)
>
> regards, tom lane
>
You get the "unused return value" warnings with -D_FORTIFY_SOURCE=2,
which has been the default on Ubuntu for years, and has been the default
on Debian for a few weeks (if you have the hardening-wrapper package
installed or running under dpkg-buildpackage).