Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35038
React-jsi provides JSI to allow React Native to interface with JavaScriptCore.
The hermes-engine Pod provides a second copy of JSI, as Hermes is built and linked statically with JSI.
This second copy of JSI would lead to an [ODR Violation](https://en.cppreference.com/w/cpp/language/definition).
To resolve this, when Hermes is enabled:
- React-hermes and hermes-engine are installed.
- React-jsc is not installed.
- React-jsi continues to be installed.
- React-jsi will not build JSI.
- React-jsi will declare a dependency on hermes-engine.
The result is that the JSI dependency for React Native is satisfied by hermes-engine, and there is no duplicate JSI library in the project.
When Hermes is disabled:
- React-jsi and React-jsc are installed.
- React-hermes and hermes-engine are not installed.
- React-jsi will build JSI.
Changelog:
[iOS][Changed] Resolve JSI ODR violation, make hermes-engine the JSI provider when Hermes is enabled
Reviewed By: cipolleschi
Differential Revision: D40334913
fbshipit-source-id: 409407a193a35cbd21b0e8778537b3627e4c54a2
Summary:
Move JSC and Hermes CocoaPods configuration to scripts/cocoapods/jsengine.rb.
This file provides a setup_jsc! function and a setup_hermes! function that will configure the necessary pod dependencies for each of the supported JavaScript engines.
Currently, the JSI and JSC pods are installed in both cases. This will likely change in upcoming changes to how Hermes and JSC are configured.
Changelog: [internal]
Reviewed By: dmytrorykun
Differential Revision: D40459234
fbshipit-source-id: d6c89c7f650b1efcce5622594db7fd726eafc2bc
Héctor Ramos