io.elementary.Sdk.json: base it on GNOME 41 runtime

[jjardon]

Advantages of doing this, apart for all the underlying updates and security fixes:

• GNOME 3.38 is now deprecated
• You can use libhandy from the GNOME runtime

[danirabbit]

I think we have to be really careful about this to make sure there's no API breaks. My initial feeling is that if GNOME is revving the version number here that means broken API, so we'd need to rev our platform version as well

[mcatanzaro]

At this point, I would jump straight to the 41 runtime.

I think we have to be really careful about this to make sure there's no API breaks. My initial feeling is that if GNOME is revving the version number here that means broken API, so we'd need to rev our platform version as well

Each new GNOME runtime version allows API/ABI breaks, so yeah, you'd definitely want to bump your platform version. Some libraries break ABI pretty aggressively, e.g. ICU or poppler. Stuff from GNOME is generally more stable than that, but not always (e.g. libgweather or gnome-desktop).

That said, GNOME 3.38 -> 40 is just a normal six-month update, same as any other. It's not going to be any more or less risky than 3.36 -> 3.38 or 3.34 -> 3.36 was. You can safely treat it the same as any other major runtime update.

[danirabbit]

@mcatanzaro we haven't done a runtime update before. This will be our first :)

But yeah it sounds like we should do a 6.1 then built from the 41 runtime and advise developers to update