bug#27810: NS runtime feature detection

[Anders Lindgren <andlind@gmail.com>]

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Hi!

There are a lot of Mac:s still used where the last supported OS version is
10.6.8. It would be a nice touch to support them, at least as long as all
we need to come up with is a good set of preprocessor tests to exclude
code. Of course, should we need to put a lot of effort into maintaining
support, I too would vote for dropping them (after all, there are fairly
modern versions of Emacs available for them).

    -- Anders

On Tue, Jul 25, 2017 at 8:22 PM, Charles A. Roelli <charles@aurox.ch> wrote:

> I'm not attached to 10.6, but if we can keep supporting it, I'd like to.
>
>
> And for what it's worth, there are 11 places in nsterm.m with
> version-specific code (unless I've missed some):
>
> 12 matches for "MAC_OS_X_VERSION_MAX_ALLOWED" in buffer: nsterm.m
>     140:#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
>     157:#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
>    5567:  MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_9
>    6329:  MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
>    7036:  MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_9
>    7098:  MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_9
>    7365:#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_7
>    7516:  MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_9
>    7547:  MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_9
>    8109:#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_9
>    8120:#endif /* MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_9 */
>    8327:  MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
>
> which seems manageable.  But if and when support for earlier macOSen
> causes problems, then I'd have no objections removing support.
>
>
>
> On 25/07/2017 19:56, Alan Third wrote:
>
>> On Mon, Jul 24, 2017 at 04:53:02PM -0400, Glenn Morris wrote:
>>
>>> FWIW, a comment from someone who is disinterested in OS X:
>>>
>>> You could probably make your life easier by not supporting more
>>> than Apple does. Eg on the net I read:
>>>
>>>      Apple is only supporting Mac OS X 10.9 – 10.11. Apple stopped
>>>      providing security updates for Mac OS 10.8 and earlier versions with
>>>      the release of Mac OS X 10.11 (El Capitan) in 2015.
>>>
>> It would make life a lot easier, we could get rid of almost all
>> version dependent code. Just dropping support for 10.6 would remove a
>> lot too.
>>
>> I doubt Charles would like that, though, and he’s the only other
>> person regularly working on the NS port.
>>
>
>

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