How to ignore duplicate symbols error in a lib file?

[rexlow]

We are trying to integrating a .a static lib file into a React Native project. During build time, we encountered an error where a symbol (constant) is found declared multiple times in the single .a file.

We also try to integrate it into a normal Xcode project while having largely the same build configuration. Xcode would only emit warnings about the duplicate symbols and the build was successful.

The screenshot below shows the linker flags we are using in the react-native project. Xcode would treat the warning as errors and will not allow the build to proceed. We suspect it was the inherited linker flags that came from other required react-native pods that cause this issue. Is there a way to ignore this error or to build them separately?

Environment

System:
    OS: macOS 10.15.5
    CPU: (8) x64 Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz
    Memory: 744.55 MB / 16.00 GB
    Shell: 5.7.1 - /bin/zsh
  Binaries:
    Node: 12.18.2 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.14.5 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.9.3 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 13.6, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
    Android SDK:
      API Levels: 23, 28, 29, 30
      Build Tools: 26.0.2, 28.0.3, 29.0.2, 30.0.0
      System Images: android-30 | Google Play Intel x86 Atom
      Android NDK: Not Found
  IDEs:
    Android Studio: 4.0 AI-193.6911.18.40.6514223
    Xcode: 11.6/11E708 - /usr/bin/xcodebuild
  Languages:
    Java: 1.8.0_252 - /usr/bin/javac
    Python: 2.7.16 - /Users/rexlow/.pyenv/shims/python
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.13.1 => 16.13.1
    react-native: 0.63.2 => 0.63.2
  npmGlobalPackages:
    *react-native*: Not Found

[github-actions]

⚠️	Missing Environment Information
ℹ️	Your issue may be missing information about your development environment. You can obtain the missing information by running react-native info in a console.

[safaiyeh]

Hi @rexlow appreciate the issue. Unfortunately the issue board is for specific bugs/issues with RN core, for configurations or build issues, Stack Overflow is a better bet. Thank you

[github-actions]

We are using GitHub issues exclusively to track bugs in the core React Native library. Please try asking over on Stack Overflow as it is better suited for this type of question.