[Development] HEADS UP: OSX build requirements for 5.7

[Petroules Jake]

Another advantage for end users is that they are guaranteed to get the latest platform features supported by that version of Qt if their OS version also supports them.

For example, if Qt is built with the 10.11 SDK and therefore provides a fast WKWebView implementation, users running on 10.11 will always get it, as opposed to Qt being built with the 10.9 SDK where users will get the slow WebView implementation instead, despite the current OS supporting WKWebView, since it wasn't compiled in to begin with.

On Feb 11, 2016, at 5:04 AM, Tor Arne Vestbø <tor.arne.vestbo at theqtcompany.com<mailto:tor.arne.vestbo at theqtcompany.com>> wrote:

On 10/02/16 22:07, Thiago Macieira wrote:
If we're going to upgrade our Xcode in all our builds, I would advise we
also make it mandatory for everyone else too. Check during configure
against the minimum SDK version, that being the *current* at the time of
release.

Yes, absolutely.

To be clear, I'm not in favour of dropping support for older toolchains. I'd
rather we kept testing them, to reasonable amounts (we can't test every Xcode
release on every OS X host). I'd rather Qt shielded people from bad practices
from vendors.

But as often happens whenever a topic like this comes up: there's a resource
constraint.

Exactly. Ideally we'd apply the process outlined in the OP for every single supported build platform, ie. build on 10.(7|8|9|10|11) and test on 10.7->10.11, but being resource constrained, both in manpower and CI resources, we can only afford to build on a single version, the latest.

Note that this should make it easier to follow SDK/toolchain updates from Apple when they come out in beta, so that we can catch those toolchain issues _before_ they get released.

tor arne

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Jake Petroules - jake.petroules at theqtcompany.com<mailto:jake.petroules at theqtcompany.com>
Consulting Services Engineer - The Qt Company

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