Subsurface on Apple Silicone

[Tomaz Canabrava]

friendly reminder from an old time lurker
that the 5.15 Qt is still being updated on the KDE infrastructure with the
LTS patches.


On Fri, Oct 15, 2021 at 11:21 PM Dirk Hohndel via subsurface <
subsurface at subsurface-divelog.org> wrote:

> OK, since I had a day off today I didn't only finish 5.0.4, I also decided
> to at least poke a toe into this mess.
>
> The summary of what I've learned so far?
>
> UGH.
>
> QtWebKit doesn't work with Qt 6 and it appears that no one is interested
> in porting that monster.
> Frankly, I can't blame them.
>
> Which means that we can't support printing with Qt 6.
>
> The rest of the changes seemed like they should be doable in a few days of
> just hunting the build errors and warnings down - nothing seems
> catastrophic.
>
> Adding Qt 6 support should give us Apple M1 support, support for
> additional localizations of the base widget (e.g., Dutch). But frankly not
> a lot more that I can identify.
> The amount of work needed to upgrade our build infrastructure to Qt 6 for
> Windows, Mac, AppImage, Android, iOS... I really don't even want to
> contemplate it.
>
> So my current plan continues to be "stay on Qt 5.15 for as long as I
> possibly can". After all, the major Linux distros are mostly still shipping
> Qt 4 :)
>
> /D
>
> On Oct 15, 2021, at 12:05 PM, Dirk Hohndel via subsurface <
> subsurface at subsurface-divelog.org> wrote:
>
>
>
> On Oct 15, 2021, at 9:55 AM, Robert Helling wrote:
>
> Hi,
>
> has anybody managed to build Subsurface on Apple Silicone? Because I
> haven’t.
>
>
> Yeah, I still don't have a Mac with M1 silicon, so no, haven't even
> tried... my understanding is that the x86 version works just fine, though...
>
> Here is a log of my frustrations.
>
> Before leaving for the summer vacation, I received a new MacMini at the
> office featuring the new ARM based Apple hardware that everybody is so
> excited about. It runs Big Sur.
>
> It took several weeks to find the time to properly take care of it,
> install all the software I need for work, get permissions right (it seems
> they changed what admin users can do when the machine is part of an active
> domain or better what they cannot do, for example install software updates
> etc etc). But those things I think I have under control by now.
>
> So I move forward and tried to set up a build environment for Subsurface.
> I encountered halve installed versions of Xcode which on the other hand
> leave behind zombi installations when removed that confuse auto build when
> still around when there is a second version as well (this took me two days
> to understand). But also that is solved. I think.
>
>
> This might be good to document in more detail, especially how to fix it
> (for the next poor person coming around to this)
>
>
> But now I hit a road block: I am able to build the subsurface object
> files. But then I came to the understanding that Qt 5.x does not exist in
> version for Apple’s ARM processors, only for the 86 family (which could be
> used in Rosetta mode and indeed the official Mac binaries from Dirk’s
> server work fine on that machine). But I have not been able to convince the
> Subsurface build system to build 86 family binaries on my ARM machine.
>
>
> No idea how to do that, frankly. I'm sure you've found this page
> https://www.qt.io/blog/qt-on-apple-silicon and if you wanted to
> experiment with Qt6 there's more stuff here
> https://doc.qt.io/qt-6/macos.html
>
> I think eventually we will need to port to Qt 6 - and that should fix the
> core of your problem, right?
>
> So I see three options to move forward: „Cross-build“ Subsurface for the
> old hardware platform. Or wait for ARM built binaries of Qt 5.x (which as I
> understand might never happen at least in the open source world). Or move
> Subsurface forward to work with Qt 6 (which might be in better shape w.r.t.
> ARM but I don’t really understand the current situation in detail).
>
>
> I think you have that right. Allegedly one can build "fairly decent" Qt
> 5.15 binaries for M1. Just takes a while :)
>
> But really, the only logical path is Qt6
>
> /D
>
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