Compatibility with ffi

[narumi147]

1. for ffi 0.1.3, current master/dev branch will build failed, is was warning before, and now it is error.

• Error: Struct 'XXXX' is empty. Empty structs are undefined behavior.
• Error: Expected type 'T' to be a valid and instantiated subtype of 'NativeType'.

2. for ffi 1.0.0, free and allocate functions are moved into abstract class, so current packages using ffi 0.1.3will also built failed.

We need to stay at a specific version if want to use those packages.

Is there any solution to make the packages compatible with old ffi and latest fluter?
Or which is is latest version of master/dev branch of flutter support old ffi?

[dcharkes]

Is there any solution to make the packages compatible with old ffi and latest fluter?

No, Flutter master/dev, has deprecated some dart:ffi features. See breaking changes dart-lang/sdk#44621 and dart-lang/sdk#44622. package:ffi was using these deprecated features and that is why allocate got removed from it.

Or which is is latest version of master/dev branch of flutter support old ffi?

The last stable release supports the old API.

The last beta release, and up coming stable release support the old and new API. You can use package:ffi 0.3.1-nullsafety.0 to ease the migration, it still supports the old API but also contains the new one. See the above linked breaking changes for how to migrate.

[narumi147]

Thanks a lot! I didn't notice that there is such a version of 0.3.x.

[github-actions]

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