Reference to swift-5

[jmkolbe]

Environment

version 0.20.1
MacOS 12.3.1
NPM 8.9.0
yarn 1.22.19

Description

A new project produces an Xcode project with swift-5 LIBRARY_SEARCH_PATHS

Reproducible Demo

Create a new project as described on https://reactnative.dev/docs/native-modules-setup:

npx create-react-native-library react-native-awesome-module
✔ What is the name of the npm package? … react-native-awesome-module
✔ What is the description for the package? … foo
✔ What is the name of package author? … f
✔ What is the email address for the package author? … [email protected]
✔ What is the URL for the package author? … http://www.bar.org
✔ What is the URL for the repository? … http://www.foo.com
✔ Which languages do you want to use? › Java & Swift
✔ What type of library do you want to develop? › Native module (to expose native APIs)

produces an Xcode project with swift-5 references:

grep -r swift-5 example/ios/ 
example/ios//AwesomeModuleExample.xcodeproj/project.pbxproj:			"\"$(TOOLCHAIN_DIR)/usr/lib/swift-5.0/$(PLATFORM_NAME)\"",
example/ios//AwesomeModuleExample.xcodeproj/project.pbxproj:			"\"$(TOOLCHAIN_DIR)/usr/lib/swift-5.0/$(PLATFORM_NAME)\"",

Including a Pod with a os.Logger dependency leads to a linker error:

Undefined symbols for architecture arm64:
  "nominal type descriptor for os.Logger"

Removing the swift-5 paths fixes the build.

[satya164]

The example project is generated by React Native CLI. So it seems like related to React Native itself. So please open an issue in React Native repo if this is a bug.