Re: Mac OS Sierra tab feature breaks C-x 5 2

[Tim Cross <theophilusx@gmail.com>]

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I think we should not put too much effort into avoiding warning on 10.6.
This is a very old version, does not receive security fixes and for the
protection of users, should not be encouraging use of 10.6. IOW if your
running 10.6, expect you will see warnings for things which have been added
since and which are not supported on that platform.

Tim

On 22 July 2017 at 21:22, Alan Third <alan@idiocy.org> wrote:

> On Fri, Jul 21, 2017 at 10:31:27PM +0200, Anders Lindgren wrote:
> > Hi!
> >
> > I just gave this matter another think-through. I don't think we ever will
> > be able to build an Emacs on an old system like 10.6.8 that will be able
> to
> > use all the bells and whistles when executed on a new system. However,
> the
> > other way around could, at some point in time, be possible.
> >
> > In other words, one solution would be something like:
> >
> >     #ifdef NS_IMPL_COCOA
> >     #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_12
> >     if ([win respondsToSelector: @selector(setTabbingMode)])
> >       [win setTabbingMode: NSWindowTabbingModeDisallowed];
> >     #endif
> >     #endif
> >
> > This should not generate any warning in any context (gcc or clang, macOS
> or
> > GNUStep). The resulting code will run correctly on the system it was
> built
> > for, and it will run correctly on older systems. The only thing that
> > doesn't work is when Emacs is built on an old system, features provided
> by
> > newer OS versions aren't included.
>
> Unfortunately it doesn’t fix our immediate issue, which is that
> setTabbingMode should be called on 10.12, but emacsformacosx.com
> builds on 10.9.
>
> I think you’re definitely right, though, that we’re not going to be
> able to come up with a uniform solution. Something has to give
> somewhere, and I’m tempted to say it should be 10.6. We could live
> with build warnings on 10.6, or just say that code like the above
> should be ifdef’d out on 10.6.
>
> Or perhaps we provide a flag that enables a universal binary build
> that doesn’t bother about hiding the warnings?
>
> I suppose that would look like:
>
>     ./configure --with-ns --universal-binary
>
>     #ifdef NS_IMPL_COCOA
>     #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_12 \
>         || defined (UNIVERSAL_BINARY)
>     if ([win respondsToSelector: @selector(setTabbingMode)])
>       [win setTabbingMode: NSWindowTabbingModeDisallowed];
>     #endif
>     #endif
>
> --
> Alan Third
>
>


-- 
regards,

Tim

--
Tim Cross

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