Proposal: Remove "Frameworks compiler requirements and Modern C++" from Policies

[Michael Pyne]

On 11/24/25 3:58 PM, Neal Gompa wrote:
> On Mon, Nov 24, 2025 at 3:54 PM Albert Astals Cid <aacid at kde.org> wrote:
>> https://community.kde.org/Frameworks/Policies#Frameworks_compiler_requirements_and_Modern_C++
>>
>> It is wildly outdated, so I would suggest to remove it.
>>
>> Or does someone have a suggested way to update it?
>>
> As far as I know, starting from 6.0, we require a C++20 capable
> compiler. That means at least GCC 12, Clang 14, or MSVC 2022 I
> believe.

I think there is value in having the policy for allowable C++ standards 
and/or compilers written down in some easily-accessible form.  Perhaps a 
bit more future-proofed so it doesn't get wildly outdated again.  I've 
been able to find references to requiring C++20-supporting compilers for 
KF6 starting from 6.0.

Are there any other relevant policies that apply to KF6 for C++ support 
and/or compiler support? Assuming not, I'd propose that the page be 
updated to note that KDE Frameworks require a C++20-compatible compiler, 
and that the compiler must also be supported by the minimum required Qt 
version as listed in the prior section.

If it were not for Qt supporting as far back as GCC 9 (for openSUSE) we 
might simply be able to require the same compiler Qt requires.  But it's 
not until GCC 12 you get nearly full support for C++20 (and even 12 
still misses parts of C++ modules support), so it's probably still worth 
mentioning we require a C++20-capable compiler.

I'll volunteer to update the page if that works, something along the 
lines of KF6 requires a C++ compiler that is compliant with at least 
C++20 and supported by the oldest supported Qt 6 minor release.

Regards,

  - Michael Pyne