[Development] Raising the minimum Core Language to C++14 for Linux/XCB

[Gatis Paeglis]

> Raising the minimum Core Language to C++14 for Linux/XCB


Ok, the title was bit misleading. You want to increase for all regular Linux builds.

That would be fine for the task I linked earlier. But

according to http://doc.qt.io/qt-5/supported-platforms.html Red Hat Enterprise Linux 6.6 does not have GCC 5.



________________________________
From: Development <development-bounces+gatis.paeglis=qt.io at qt-project.org> on behalf of Gatis Paeglis <Gatis.Paeglis at qt.io>
Sent: Sunday, July 15, 2018 12:17:52 PM
To: Thiago Macieira; development at qt-project.org
Subject: Re: [Development] Raising the minimum Core Language to C++14 for Linux/XCB


> There has been no reply on this subject. Shall I assume silence is consent and
> we can begin using C++14 constructs in the XCB plugin?


I think I know which patch you are talking about and then my answer is we can't. The code that you

are looking at I want to eventually move in some common place (out of XCB) as part of [1].


[1] https://bugreports.qt.io/browse/QTBUG-65503<https://b>

________________________________
From: Development <development-bounces+gatis.paeglis=qt.io at qt-project.org> on behalf of Thiago Macieira <thiago.macieira at intel.com>
Sent: Saturday, July 14, 2018 4:23:01 PM
To: development at qt-project.org
Subject: Re: [Development] Raising the minimum Core Language to C++14 for Linux/XCB

On Thursday, 5 July 2018 12:53:14 PDT Thiago Macieira wrote:
> On Mac, we kinda already require that. I'm asking to raise the minimum for
> the regular Linux builds to C++14. Specifically, I'm asking for the "auto"
> functions without trailing return type and relaxed constexpr.
>
> Currently, our minimum supported GCC version is 4.7 (on QNX only) and 4.8
> elsewhere. That would raise the minimum on Linux to GCC 5, as per:
>        https://gcc.gnu.org/projects/cxx-status.html#cxx14
>
> That's a 3-year-old compiler, four releases out of date, present in the
> main, binary Linux distros since:
>        Ubuntu 15.10            [2015]
>        Fedora 22               [2015]
>        Debian 9 (Stretch)      [2017]
>        openSUSE Leap 15 [2018]
>
> Note that this does not apply to QNX or Android, so C++14 features would not
> be allowed in cross-platform code.
>
> But we'd be able to use it in the XCB plugin. [Does QNX build that?]

There has been no reply on this subject. Shall I assume silence is consent and
we can begin using C++14 constructs in the XCB plugin?

--
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center



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