qt 6.5.0 removes support for macOS 10.14 and macOS 10.15

[John Hoyt]

Marcus,

I'd be very happy to collaborate with you on this!  Also very happy to have
you become the port maintainer.

It makes a lot of sense to me to update / correct the qt6 portfile and PG.
You have a lot more experience that I borrowed from for the initial qt6
portfile and PG.  Happy to have your improvements here.

Thanks!
John

On Wed, Apr 5, 2023 at 9:04 AM <mcalhoun at macports.org> wrote:

> I have not looked at the specific issues with Qt 6.5.
> However, based on our experience with the Qt5 ports, I would suggest
> sticking to the upstream recommendations concerning supported versions.
>
> For Qt5, most of the incompatibilities were in parts of the OS that
> LegacySupport and other mechanisms could not get around.
> Even if the current version works on older systems now, changes in the
> patch version have introduced incompatibilities.
>
> -Marcus
>
> > On Apr 5, 2023, at 5:31 AM, Chris Jones <jonesc at hep.phy.cam.ac.uk>
> wrote:
> >
> > Hi,
> >
> > Just to add, it would also be useful to know a bit on the reasons for
> dropping the older OSes, what exactly are the tehcnical reasons for it, as
> within macports we have a number of build options available to us, like
> newer builds of the compilers which can be used instead of the Xcode
> versions, that help us support a lot of ports on systems way older than
> upstream for them officially support.
> >
> > cheers Chris
> >
> > On 05/04/2023 2:02 am, John Hoyt wrote:
> >> Renee,
> >> Thanks for the pointers - I'll take a look with fresh eyes tomorrow.
> I've added a todo list in the PR, as it's very much a WIP - although I have
> been able to successfully build all subports locally (still have to test
> and attempt to build on arm).
> >> Just a heads up - Qt6.5 seems to be a little different than the work
> we've done on Qt 6.2.  Some of the qt5 based CMake updates seem to no
> longer be necessary (and in some cases now break things forcing incorrect
> paths).
> >> Regards,
> >> John
> >> On Tue, Apr 4, 2023 at 8:39 PM Renee Otten <ottenr.work at gmail.com
> <mailto:ottenr.work at gmail.com>> wrote:
> >>    hi John,
> >>    Thanks for working on that! Regarding the support of older macOS
> >>    versions: The Qt5 PortGroup and ports are the example on how this
> >>    was done for Qt5 and likely on how to do the same for Qt6.
> >>    I likely will not have time to do much work on this myself but will
> >>    look at the PR and see if I can provide some help…
> >>    Best,
> >>    Renee
> >>>    On Apr 4, 2023, at 8:32 PM, John Hoyt <john.hoyt at gmail.com
> >>>    <mailto:john.hoyt at gmail.com>> wrote:
> >>>
> >>>    
> >>>    I've started working on updating the qt6 port to qt 6.5.0 (see
> >>>    https://github.com/macports/macports-ports/pull/18186
> >>>    <https://github.com/macports/macports-ports/pull/18186>).
> >>>
> >>>    Qt 6.5.0 removed support for macOS 10.14 and 10.15, only
> >>>    supporting macOS 11 and newer whereas qt 6.2 supports macOS >=
> 10.14.
> >>>
> >>>    Any suggestions on how to handle the deprecation of macOS 10.14
> >>>    and 10.15?
> >>>
> >>>    Thanks,
> >>>    John
>
>
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