XCode Build Error

[thompsonnoah]

Before submitting a new issue

• I tested using the latest version of the library, as the bug might be already fixed.
• I tested using a supported version of react native.
• I checked for possible duplicate issues, with possible answers.

Bug summary

Hello,

When attempting a build with XCode, after running pod install, I get this error:

Undefined symbol: callstack::polygen::generated::loadWebAssemblyModule(std::__1::span<unsigned char, 18446744073709551615ul>)

Library version

0.2.0

Environment info

System:
  OS: macOS 15.3.1
  CPU: (10) arm64 Apple M1 Pro
  Memory: 119.89 MB / 16.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 22.14.0
    path: /opt/homebrew/opt/node@22/bin/node
  Yarn:
    version: 1.22.22
    path: /usr/local/bin/yarn
  npm:
    version: 10.9.2
    path: /opt/homebrew/opt/node@22/bin/npm
  Watchman:
    version: 2025.03.03.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.15.2
    path: /usr/local/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.2
      - iOS 18.2
      - macOS 15.2
      - tvOS 18.2
      - visionOS 2.2
      - watchOS 11.2
  Android SDK: Not Found
IDEs:
  Android Studio: Not Found
  Xcode:
    version: 16.2/16C5032a
    path: /usr/bin/xcodebuild
Languages:
  Java: Not Found
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli":
    installed: 15.0.0
    wanted: 15.0.0
  react:
    installed: 18.3.1
    wanted: 18.3.1
  react-native:
    installed: 0.76.0
    wanted: 0.76.0
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Steps to reproduce

1. Install @callstack/polygen
2. Add wasm file and run polygen-cli scan and polygen-cli generate
3. Run pod install
4. Build with XCode

Reproducible sample code

N/A

[mars-peng-lb]

Confirm same issue here.
@robik Can you take a look at this issue?
Thanks.

[robik]

Hey, are you trying to build the example app? Is this error occurring when trying to add a specific webassembly module?

[thompsonnoah]

Hi @robik,

I was able to get around this problem by adding this line to my Podfile:

pod 'ReactNativeWebAssemblyHost', :path => "../node_modules/.polygen-out/@host"

Appreciate the help! If you wouldn't mind, I would like to continue the discussion on Discord for a separate issue.