[iOS] Build error when building framework for template demo app

[diederikh]

Environment

macOS 15.5
Xcode 16.2 (tried 16.3 and 16.4 as well).

Description

I've created the template rnef project and followed the Callstack YT tutorial "Adding RN to iOS and Android has never been easier."

When building the framework with "bun rnef package:ios --scheme RNScreens --verbose --configuration Release" I get the following compile error:

1.      Apple Swift version 6.0.3 (swiftlang-6.0.3.1.10 clang-1600.0.30.1)
2.      Compiling with effective version 5.10
3.      While evaluating request ExecuteSILPipelineRequest(Run pipelines { PrepareOptimizationPasses, EarlyModulePasses, HighLevel,Function+EarlyLoopOpt, HighLevel,Module+StackPromote, MidLevel,Function, ClosureSpecialize, LowLevel,Function, LateLoopOpt, SIL Debug Info Generator } on SIL for RNScreens)
4.      While running pass #5254 SILFunctionTransform "EarlyPerfInliner" on SILFunction "@$s9RNScreens25MedableReactNativeManagerCACyAA0cdE5ErrorOYKcfcTo".
 for 'init()' (at /Users/diederik/Development/Medable/react-native-patient-app/ios/RNScreens/MedabeReactNativeManager.swift:13:10)
Stack dump without symbol names (ensure you have llvm-symbolizer in your PATH or set the environment var `LLVM_SYMBOLIZER_PATH` to point to it):
0  swift-frontend           0x000000010a3c6a9c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) + 56
1  swift-frontend           0x000000010a3c4cf0 llvm::sys::RunSignalHandlers() + 112
2  swift-frontend           0x000000010a3c7068 SignalHandler(int) + 292
3  libsystem_platform.dylib 0x0000000180850624 _sigtramp + 56
4  swift-frontend           0x0000000105dae774 ConstantTracker::scanProjections(swift::SILValue, llvm::SmallVectorImpl<swift::Projection>*) + 88
5  swift-frontend           0x0000000105dae2a0 ConstantTracker::trackInst(swift::SILInstruction*) + 232
6  swift-frontend           0x0000000105c79aa8 (anonymous namespace)::SILPerformanceInliner::isProfitableToInline(swift::FullApplySite, ShortestPathAnalysis::Weight, ConstantTracker&, int&, llvm::DenseMap<swift::SILBasicBlock*, unsigned long long, llvm::DenseMapInfo<swift::SILBasicBlock*, void>, llvm::detail::DenseMapPair<swift::SILBasicBlock*, unsigned long long>> const&) + 3252
7  swift-frontend           0x0000000105c769f8 (anonymous namespace)::SILPerformanceInlinerPass::run() + 9160
8  swift-frontend           0x0000000105bb1b74 swift::SILPassManager::runFunctionPasses(unsigned int, unsigned int) + 3448
9  swift-frontend           0x0000000105bab394 swift::SILPassManager::executePassPipelinePlan(swift::SILPassPipelinePlan const&) + 252
10 swift-frontend           0x0000000105be76a4 swift::SimpleRequest<swift::ExecuteSILPipelineRequest, std::__1::tuple<> (swift::SILPipelineExecutionDescriptor), (swift::RequestFlags)1>::evaluateRequest(swift::ExecuteSILPipelineRequest const&, swift::Evaluator&) + 56
11 swift-frontend           0x0000000105bcb008 swift::ExecuteSILPipelineRequest::OutputType swift::Evaluator::getResultUncached<swift::ExecuteSILPipelineRequest, swift::ExecuteSILPipelineRequest::OutputType swift::evaluateOrFatal<swift::ExecuteSILPipelineRequest>(swift::Evaluator&, swift::ExecuteSILPipelineRequest)::'lambda'()>(swift::ExecuteSILPipelineRequest const&, swift::ExecuteSILPipelineRequest::OutputType swift::evaluateOrFatal<swift::ExecuteSILPipelineRequest>(swift::Evaluator&, swift::ExecuteSILPipelineRequest)::'lambda'()) + 412
12 swift-frontend           0x0000000105bcdce4 swift::runSILOptimizationPasses(swift::SILModule&) + 440
13 swift-frontend           0x0000000105144518 swift::CompilerInstance::performSILProcessing(swift::SILModule*) + 1160
14 swift-frontend           0x0000000104d6e9c4 performCompileStepsPostSILGen(swift::CompilerInstance&, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>>, llvm::PointerUnion<swift::ModuleDecl*, swift::SourceFile*>, swift::PrimarySpecificPaths const&, int&, swift::FrontendObserver*) + 1376
15 swift-frontend           0x0000000104d6e340 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 2888
16 swift-frontend           0x0000000104d70e88 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) + 1684
17 swift-frontend           0x0000000104d6fbb4 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) + 3572
18 swift-frontend           0x0000000104cf6a5c swift::mainEntry(int, char const**) + 3680
19 dyld                     0x0000000180476b98 start + 6076
Command SwiftCompile failed with a nonzero exit code

CompileSwift normal arm64 (in target 'RNScreens' from project 'ReactNativePatientApp')
    cd /Users/diederik/Development/Medable/react-native-patient-app/ios

Reproducible Demo

I've attached a zip file with the demo project.

rnef-test-app.zip

[diederikh]

Nevermind, found out what the problem was. I did not embed and sign the Pods framework for the new framework.
Xcode now builds the framework.
However the "rnef package package:ios" command does not:

...
warning: Run script build phase 'Create Symlinks to Header Folders' will be run during every build because it does not specify any outputs. To address this issue, either add output dependencies to the script phase, or configure it to run in every build by unchecking "Based on dependency analysis" in the script phase. (in target 'RCT-Folly' from project 'Pods')
** BUILD FAILED **


The following build commands failed:
        SwiftEmitModule normal arm64 Emitting\ module\ for\ RNScreens (in target 'RNScreens' from project 'ReactNativePatientApp')
        EmitSwiftModule normal arm64 (in target 'RNScreens' from project 'ReactNativePatientApp')
        Building workspace ReactNativePatientApp with scheme RNScreens and configuration Debug
(3 failures)
│
◇  Running xcodebuild failed. Use --verbose flag to see the full output.
│
■  RnefError: Failed to create build
│      at createBuild (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/commands/build/createBuild.js:26:15)
│      at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
│      at async Object.action (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/plugin-brownfield-ios/dist/src/lib/pluginBrownfieldIos.js:26:13)
│      ... 2 lines matching cause stack trace ...
│      at async cli (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/cli/dist/src/lib/cli.js:74:5) {
│    [cause]: RnefError: Running xcodebuild failed
│        at buildProject (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/commands/build/buildProject.js:101:15)
│        at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
│        at async buildApp (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/utils/buildApp.js:46:5)
│        at async createBuild (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/commands/build/createBuild.js:11:48)
│        at async Object.action (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/plugin-brownfield-ios/dist/src/lib/pluginBrownfieldIos.js:26:13)
│        at async Command.<anonymous> (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/cli/dist/src/lib/cli.js:39:17)
│        at async Command.parseAsync (/Users/diederik/Development/Medable/react-native-patient-app/node_modules/commander/lib/command.js:1092:5)
│        at async cli (file:///Users/diederik/Development/Medable/react-native-patient-app/node_modules/@rnef/cli/dist/src/lib/cli.js:74:5) {
│      [cause]: ''
│    }
│  }
error: "rnef" exited with code 1

[thymikee]

cc @atlj

[atlj]

Hey I debugged your reproducible example. Looks like ios/RNScreens/MedabeReactNativeManager.swift is causing a bug in the Swift compiler. Removing the file helps. And you have ios/RNScreens/RNScreens.swift so the generated framework already has a public interface.

So I removed that file and ran the build again, this time got another error:

RnefError: Failed to create build
│      at createBuild (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/commands/build/createBuild.js:26:15)
│      at async Object.action (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/plugin-brownfield-ios/dist/src/lib/pluginBrownfieldIos.js:26:13)
│      ... 2 lines matching cause stack trace ...
│      at async cli (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/cli/dist/src/lib/cli.js:74:5) {
│    [cause]: SubprocessError: Command failed with exit code 64: xcodebuild -workspace ReactNativePatientApp.xcworkspace -scheme RNScreens -configuration Debug -destination 'generic/platform=iOS' -destination 'generic/platform=iOS Simulator' -showBuildSettings -json
│        at checkFailure (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/nano-spawn/source/result.js:40:9)
│        at getResult (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/nano-spawn/source/result.js:17:3)
│        at async getBuildSettings (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/commands/run/getBuildSettings.js:4:39)
│        at async buildApp (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/utils/buildApp.js:55:27)
│        at async createBuild (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/platform-apple-helpers/dist/src/lib/commands/build/createBuild.js:11:48)
│        at async Object.action (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/plugin-brownfield-ios/dist/src/lib/pluginBrownfieldIos.js:26:13)
│        at async Command.<anonymous> (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/cli/dist/src/lib/cli.js:39:17)
│        at async Command.parseAsync (/Users/burakguner/Downloads/rnef-test-app/node_modules/commander/lib/command.js:1092:5)
│        at async cli (file:///Users/burakguner/Downloads/rnef-test-app/node_modules/@rnef/cli/dist/src/lib/cli.js:74:5) {
│      exitCode: 64,
│      stdout: '',
│      stderr: '2025-06-03 00:34:38.265 xcodebuild[83347:52396508] Writing error result bundle to /var/folders/1x/y532fxn929zgkpqg9cn6hy8h0000gn/T/ResultBundle_2025-03-06_00-34-0038.xcresult\n' +
│        'xcodebuild: error: Could not configure request to show build settings: You must specify exactly one -destination argument.',
│      output: '2025-06-03 00:34:38.265 xcodebuild[83347:52396508] Writing error result bundle to /var/folders/1x/y532fxn929zgkpqg9cn6hy8h0000gn/T/ResultBundle_2025-03-06_00-34-0038.xcresult\n' +
│        'xcodebuild: error: Could not configure request to show build settings: You must specify exactly one -destination argument.',
│      command: "xcodebuild -workspace ReactNativePatientApp.xcworkspace -scheme RNScreens -configuration Debug -destination 'generic/platform=iOS' -destination 'generic/platform=iOS Simulator' -showBuildSettings -json",
│      durationMs: 2838.369708
│    }
│  }

But luckily, I've already patched this with #271 (link to fix)

[thymikee]

Build error fixed in #378 which is released in 0.7.17