无法构建 iOS 应用程序（Xcode 版本 9.4.1 (9F2000)，Flutter 0.5.1）

Question

这是一个试驾示例“https://flutter.io/get-started/test-drive/#terminal” 我遇到以下错误，请评论如何解决此问题。

Xcode's output:
↳
    === BUILD TARGET Runner OF PROJECT Runner WITH CONFIGURATION Debug ===
    clang-3.5: error: unknown argument: '-gmodules'
    clang-3.5: error: unknown argument: '-fbuild-session-file=/Users/nelson/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation'
    clang-3.5: error: no such file or directory: '/Users/nelson/Library/Developer/Xcode/DerivedData/Runner-ctvpprsqskddfxbtqtsepwpaebqm/Index/DataStore'
    clang-3.5: error: option '-fmodules-validate-once-per-build-session' requires '-fbuild-session-timestamp=<seconds since Epoch>'
    Command /usr/local/bin/clang-omp failed with exit code 1
    clang-3.5: error: unknown argument: '-gmodules'
    clang-3.5: error: unknown argument: '-fbuild-session-file=/Users/nelson/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation'
    clang-3.5: error: no such file or directory: '/Users/nelson/Library/Developer/Xcode/DerivedData/Runner-ctvpprsqskddfxbtqtsepwpaebqm/Index/DataStore'
    clang-3.5: error: option '-fmodules-validate-once-per-build-session' requires '-fbuild-session-timestamp=<seconds since Epoch>'
    Command /usr/local/bin/clang-omp failed with exit code 1
    === BUILD TARGET Runner OF PROJECT Runner WITH CONFIGURATION Debug ===
    error: the following command failed with exit code 1 but produced no further output
    CompileC /Users/nelson/Library/Developer/Xcode/DerivedData/Runner-ctvpprsqskddfxbtqtsepwpaebqm/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.build/Objects-normal/x86_64/Runner_vers.o /Users/nelson/Library/Developer/Xcode/DerivedData/Runner-ctvpprsqskddfxbtqtsepwpaebqm/Build/Intermediates.noindex/Runner.build/Debug-iphonesimulator/Runner.build/DerivedSources/Runner_vers.c normal x86_64 c com.apple.compilers.llvm.clang.1_0.compiler
    clang-3.5: error: unknown argument: '-gmodules'
    clang-3.5: error: unknown argument: '-fbuild-session-file=/Users/nelson/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation'
    clang-3.5: error: no such file or directory: '/Users/nelson/Library/Developer/Xcode/DerivedData/Runner-ctvpprsqskddfxbtqtsepwpaebqm/Index/DataStore'
    clang-3.5: error: option '-fmodules-validate-once-per-build-session' requires '-fbuild-session-timestamp=<seconds since Epoch>'
    Command /usr/local/bin/clang-omp failed with exit code 1
    clang-3.5: error: unknown argument: '-gmodules'
    clang-3.5: error: unknown argument: '-fbuild-session-file=/Users/nelson/Library/Developer/Xcode/DerivedData/ModuleCache.noindex/Session.modulevalidation'
    clang-3.5: error: no such file or directory: '/Users/nelson/Library/Developer/Xcode/DerivedData/Runner-ctvpprsqskddfxbtqtsepwpaebqm/Index/DataStore'
    clang-3.5: error: option '-fmodules-validate-once-per-build-session' requires '-fbuild-session-timestamp=<seconds since Epoch>'
    Command /usr/local/bin/clang-omp failed with exit code 1
Could not build the application for the simulator.
Error launching application on iPhone 7 Plus.

Answer 1

我已将问题解决如下：

如果你仔细看问题，它触发了一个过时的clang 3.5版本，我卸载了一个过时的版本并安装了一个新的。

1. 从 os x 中移除 clang-omp

   $ brew uninstall clang-omp
   

2. 卸载clang-omp后，需要更新到最新版本的flutter安装程序。实际上，我之前更新过，但我又做了一次。

   $ flutter upgrade
   

3. 我尝试再次运行flutter，但无法编译。它缺少 clang-omp

   $ flutter run    
   === BUILD TARGET Runner OF PROJECT Runner WITH CONFIGURATION Debug ===
       error: can't exec '/usr/local/bin/clang-omp' (No such file or directory)
       Command /usr/local/bin/clang-omp failed with exit code 71
       error: can't exec '/usr/local/bin/clang-omp' (No such file or directory)
       Command /usr/local/bin/clang-omp failed with exit code 71
   

4. 因为它在编译期间需要更新版本的 clang。我安装了llvm

   $ brew install llvm
   

5. 并相应地更新 PATH。

   echo 'export PATH="/usr/local/opt/llvm/bin:$PATH"' >> ~/.bash_profile
   

6. 再次编译应用，编译成功。

   $ flutter run
   Launching lib/main.dart on iPhone 7 Plus in debug mode...
   Starting Xcode build...                                          
   ├─Assembling Flutter resources...                    1.1s
   └─Compiling, linking and signing...                  8.6s
   Xcode build done.                                           11.3s
   Syncing files to device iPhone 7 Plus...                     3.9s
   
   ?  To hot reload changes while running, press "r". To hot restart (and rebuild state), press "R".
   An Observatory debugger and profiler on iPhone 7 Plus is available at: http://127.0.0.1:8100/
   For a more detailed help message, press "h". To quit, press "q".
   
   Initializing hot reload...                                       
   Reloaded 0 of 391 libraries in 486ms.