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Riccardo Cipolleschi b6b09a7e72 Add support for distributed registration of Fabric Components with Dynamic Libraries (#37274 )

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/37274

With dynamic frameworks, we can't use floating C functions.

The way in which dynamic frameworks work is that they need to be self contained. They are built in isolation so that other frameworks can be linked against them to solve their dependencies.

Currently, when working with 3rd party libraries, we are Codegenerating a RCTThirdPartyComponentProvider which tries to invoke floating C functions that are defined in other modules. React-RCTFabric has no visibility on those modules, therefore it fails building.

The implemented solution exclude the generation of those symbols and leverage a the Objective-C runtime to automatically register libraries when they are loaded.

**This mechanism is applied ONLY when the flag RCT_DYNAMIC_FRAMEWORKS is turned on.** There will be no impact on internal meta apps, nor on any apps that are not using Dynamic Frameworks.

This change requires a small migration in all the Fabric components libraries that wants to support dynamic frameworks. They have to implement a
```
+ (void)load
{
[super load];
}
```
method in their ComponentView.

Not to slow down the adoption of the new architecture, waiting for a migration in the ecosystem, the next diff introduce a secondary, declarative loading mechanism for Fabric Components, which follows the same approach used by TurboModules.

## Changelog:
[iOS][Changed] - Add support for distributed registration of Fabric Components with Dynamic Libraries.

Notes that this change is NOT breaking as dynamic frameworks were not working before in the New Architecture. Static Libraries and Static Frameworks continue working as usual.

Reviewed By: dmytrorykun

Differential Revision: D45605441

fbshipit-source-id: e609fbf6f92fddfbaa676227fde60962d6b0faa4

2023-05-15 08:14:59 -07:00

buck_tests

Add codegen support for DimensionValue for components (#35953 )

2023-01-26 18:52:10 -08:00

e2e

Remove use of JSI_EXPORT from codegen (#37085 )

2023-04-25 12:39:37 -07:00

scripts

Use realpath instead of readlink