Deps for LyX 2.5: GCC 8.5, Qt 5.12, Python 3.8 (was: GCC >= 5?)

[Jean-Marc Lasgouttes]

Le 22/10/2024 à 15:11, Pavel Sanda a écrit :
> On Tue, Oct 22, 2024 at 01:18:45PM +0200, Jean-Marc Lasgouttes wrote:
>> Le 22/10/2024 ?? 11:35, Pavel Sanda a écrit :
>>> Yes, I think we can bump to GCC 8.5 and Qt 5.12.
>>
>> 8.5 or 8, I guess. They should be equivalent, except for bugs.
> 
> Agreed.
> 
>>> If someone wants to go through the sources and cleanup ifdefs we can switch anytime.
>>>
>>> By doing this we should get access to C++17, so my favourite new feature highlights:
>>> - if & switch with initializers: if (status_code c = foo(); c != SUCCESS) {...
>>>     https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0305r1.html
>>> - structured bindings to get direct access inside pairs & maps in loops: for (const auto& [key,val] : myMap) {
>>>     https://www.cppstories.com/2022/structured-bindings/
>>
>> Looks good. I thought all the fun stuff was in C++20.
> 
> Do you plan to do the clenaup wrt ifdefs?

I can. Instead of compiler versions, we could check for the features we 
want (like we do now in LYX_CXX_CXX11_FLAGS (config/lyxinclude.m4)) from 
C++17. Would you have a snippet for me to add in there (and rename to 
LYX_CXX_CXX17_FLAGS)?

The Qt part will be easier.

JMarc