On tis, 2011-10-18 at 16:13 -0400, Tom Lane wrote:
> Peter Eisentraut <pete...@gmx.net> writes:
> > On tis, 2011-10-18 at 15:43 -0400, Tom Lane wrote:
> >> 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)
> 
> > 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).
> 
> Ah-hah.  That's also the default on Red Hat platforms, *if* you are
> building RPMs, and now that I think of it, I do see this warning when
> building RPMs.  Seems weird that they'd have set it up that way though
> rather than with a -W switch.

There is a switch -Wunused-result, but it's on by default.



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