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Re: Confusion in setting default options for non-C/C++ languages
On Mon, 31 Jan 2011, Xinliang David Li wrote:
> On Mon, Jan 31, 2011 at 9:52 AM, Joseph S. Myers
> <joseph@codesourcery.com> wrote:
> > On Sun, 30 Jan 2011, Ian Lance Taylor wrote:
> >
> >> I think that the call to lang_hooks.init_option_struct must be moved
> >> after the call to default_options_optimization, one way or another.
> >
> > No, that is wrong; by design this structure initialization should happen
> > before the options from the command line (including -On) have their
> > effects. ?Rather, I think -fno-fast-math - whether explicit or implicit -
> > should not be overriding such language-dependent defaults for particular
> > options; if a language defaults to -fno-math-errno, explicit -fmath-errno
> > should be required to override that (essentially, the set of options
> > implied by -ffast-math / -fno-fast-math should depend on the language).
>
> Should the optimization-dependent-defaluts also be split into a
> language dependent and independent parts?
I hope that can be avoided, but if needed there is always the post_options
hook that can do arbitrary processing as needed.
--
Joseph S. Myers
joseph@codesourcery.com