[Development] Supported compilers for Qt 6
Eike.Ziller at qt.io
Mon Aug 12 10:08:36 CEST 2019
> On 12. Aug 2019, at 09:58, Lars Knoll <lars.knoll at qt.io> wrote:
>> On 12 Aug 2019, at 09:45, Allan Sandfeld Jensen <kde at carewolf.com> wrote:
>> On Monday, 12 August 2019 09:17:58 CEST Lars Knoll wrote:
>>> As mentioned in my blog, it would be good to move forward with the C++
>>> version we use for Qt 6 and ideally move it to C++17. That implies that we
>>> need to drop some older compilers for Qt 6. As 5.15 is going to be an LTS
>>> release, I don’t think this is going to be a huge problem.
>>> Here’s the baseline I would like to propose:
>>> VC++ 2019
>>> GCC 8
>>> Clang 6
>>> Apple Clang 10.0
>> Why not the latest for all the compilers, like gcc 9 and clang 8? I assumed we
>> would use the 5.15 LTS to justify requiring the latest available compiler on
>> all platforms.
> I used the minimal version that seemed to be giving us decent C++17 support (according to https://en.cppreference.com/w/cpp/compiler_support).
> I’d personally be favour of using newer version of gcc/clang, but I’m not sure we gain a lot with it, as Apple clang is then probably the limiting factor. But we could upgrade that to Apple Clang 11 as well.
> So alternative proposal:
> VC++ 2019
> GCC 9
At least on CentOS / RHEL, GCC8 currently seems to be the latest available compiler (on CentOS/RHEL 7 via devtoolset-8). (No idea about timing of updated devtoolsets.)
> Clang 8
> Apple Clang 11
>> Especially clang 6 is a bit old.
> Clang 6 is just a bit over a year old... :)
>> I know for msvc-clang we already pretty much
>> assume clang-cl 8. But we have not automated testing of non-apple clang, so it
>> often breaks due to extra warnings or genuine clang bugs.
> Yes. It would be good to have a build using standard clang in CI in the future. But that’s a separate topic :)
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