https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66448
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Aldy Hernandez from comment #2)
> > 2. Once (1) is fixed, bootstrap then fails with:
> >
> > /GCC/gcc-trunk/gcc/ipa-pure-const.c:1640:1: error:
> > ‘{anonymous}::pass_ipa_pure_const::pass_ipa_pure_const(gcc::context*)’
> > defined but not used [-Werror=unused-function]
> > pass_ipa_pure_const::
> >
> > A --disable-werror boostrap completes, but there are a number of
> > constructors and destructors that report "declared but not used". AFAICT,
> > it's only constructors/destructors.
> >
> > This is occurring at stage #2, and I thought maybe that the stage#1 compiler
> > could have been mis-compiled by the bootstrap; however, gcc-4.9, 5.1 and
> > clang (xcode 5.1.1) bootstraps all give the same result.
>
> Jason, is pass_ipa_pure_const::pass_ipa_pure_const() really declared but not
> used?
I bet a drink that it is an incharge vs outofcharge construct/deconstruct
issue. Darwin does not support aliases so the function itself is cloned.
>
> If so, can we mark it ATTRIBUTE_UNSUED or is there a more generic way of
> fixing this?
