Re: meson: Non-feature feature options

Hi,

On Mon, 20 Feb 2023 at 22:42, Andres Freund <andres@anarazel.de> wrote:
> On 2023-02-20 19:53:53 +0100, Peter Eisentraut wrote:
> > On 20.02.23 13:33, Nazir Bilal Yavuz wrote:
> > > I added SSL and UUID patches. UUID patch has two different fixes:
> > >
> > > 1 - v1-0002-meson-Refactor-UUID-option.patch: Adding 'auto' choice to
> > > 'uuid' combo option.
> > >
> > > 2 - v1-0002-meson-Refactor-UUID-option-with-uuid_library.patch: Making
> > > 'uuid' feature option and adding new 'uuid_library' combo option with
> > > ['auto', 'bsd', 'e2fs', 'ossp'] choices. If 'uuid_library' is set other
> > > than 'auto' and it can't be found, build throws an error.
> > >
> > > What do you think?
> >
> > I like the second approach, with a 'uuid' feature option.  As you wrote
> > earlier, adding an 'auto' choice to a combo option doesn't work fully like a
> > real feature option.
>
> But we can make it behave exactly like one, by checking the auto_features
> option.

Yes, we can set it like `uuidopt = get_option('auto_features')`.
However, if someone wants to set 'auto_features' to 'disabled' but
'uuid' to 'enabled'(to find at least one working uuid library); this
won't be possible. We can add 'enabled', 'disabled and 'auto' choices
to 'uuid' combo option to make all behaviours possible but adding
'uuid' feature option and 'uuid_library' combo option seems better to
me.

Regards,
Nazir Bilal Yavuz
Microsoft