What is legacy Godot 4.0 mode and how to disable it?

[RonYanDaik]

I've just switched to master branch both for godot and for gdextension and got this:
"Cannot load a GDExtension built for Godot 4.1+ in legacy Godot 4.0 mode"
But cant find information how to switch to non legacy mode.

[RonYanDaik]

oh. you have to add to *.gdextension:

compatibility_minimum = 4.1

[Calinou]

Reopening, as this should be documented.

[dsnopek]

After Godot PR godotengine/godot#77963 there is no longer a "legacy Godot 4.0 mode", so the error message here could probably also be simplified to just:

Cannot load a GDExtension built for Godot 4.1+ in Godot 4.0

If you try to load a GDExtension in Godot 4.1 and it's missing "compatibility_minimum", it'll now give the error:

GDExtension configuration file must contain a "configuration/compatibility_minimum" key

So, assuming we update the first error message, there shouldn't be any confusion about what the developer is supposed to do anymore.

[dsnopek]

I just posted PR #1137, which update the error message as described above