title: Not able to run a Flutter iOS App when added sqlflite plugin
body: <p>When I added the sqflite plugin (<a href="https://pub.dev/packages/sqflite" rel="nofollow noreferrer">https://pub.dev/packages/sqflite</a>) to my project, as well as the path plugin (<a href="https://pub.dev/packages/path" rel="nofollow noreferrer">https://pub.dev/packages/path</a>), the <em>pod install</em> command is not running anymore.</p>
  <pre><code>CocoaPods' output:
  
  [!] Invalid `Podfile` file: Function not implemented @ rb_file_s_symlink - (/Users/jairrillojunior/.pub-cache/hosted/pub.dartlang.org/sqflite-1.3.2+1/,
  /Users/jairrillojunior/Box/IBM - Documents/Flutter/flutter_sqflite/ios/.symlinks/plugins/sqflite).
  
   #  from /Users/jairrillojunior/Box/IBM - Documents/Flutter/flutter_sqflite/ios/Podfile:34
   #  -------------------------------------------
   #
   &gt;    flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
   #  end
   #  -------------------------------------------
  
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:318:in `rescue in block in from_ruby'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:312:in `block in from_ruby'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:50:in `instance_eval'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:50:in `initialize'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:310:in `new'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:310:in `from_ruby'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.10.0/lib/cocoapods-core/podfile.rb:276:in `from_file'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/config.rb:205:in `podfile'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command.rb:160:in `verify_podfile_exists!'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command/install.rb:46:in `run'
  /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/lib/cocoapods/command.rb:52:in `run'
  /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.10.0/bin/pod:55:in `&lt;top (required)&gt;'
  /usr/local/bin/pod:23:in `load'
  /usr/local/bin/pod:23:in `&lt;main&gt;'
  </code></pre>
  <p>Error running pod install
  Error launching application on iPhone 11.</p>
  <p>flutter doctor:</p>
  <pre><code>[✓] Flutter (Channel master, 1.24.0-4.0.pre.122, on Mac OS X 10.15.6 19G2021 darwin-x64, locale en-BR)
      • Flutter version 1.24.0-4.0.pre.122 at /usr/local/flutter
      • Framework revision 4aad058a49 (22 minutes ago), 2020-10-28 17:02:37 -0400
      • Engine revision 64e6599910
      • Dart version 2.11.0 (build 2.11.0-260.0.dev)
  
  [✓] Android toolchain - develop for Android devices (Android SDK version 30.0.0)
      • Android SDK at /Users/jairrillojunior/Library/Android/sdk
      • Platform android-30, build-tools 30.0.0
      • ANDROID_HOME = /Users/jairrillojunior/Library/Android/sdk
      • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
      • All Android licenses accepted.
  
  [✓] Xcode - develop for iOS and macOS (Xcode 12.1)
      • Xcode at /Applications/Xcode.app/Contents/Developer
      • Xcode 12.1, Build version 12A7403
      • CocoaPods version 1.10.0
  
  [✓] Android Studio (version 4.0)
      • Android Studio at /Applications/Android Studio.app/Contents
      • Flutter plugin version 46.0.2
      • Dart plugin version 193.7361
      • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
  
  [✓] VS Code (version 1.50.1)
      • VS Code at /Applications/Visual Studio Code.app/Contents
      • Flutter extension version 3.15.1
  
  [✓] Connected device (1 available)
      • iPhone 11 (mobile) • 351AEE81-599C-42E6-BEDB-46FD919491D9 • ios • com.apple.CoreSimulator.SimRuntime.iOS-14-1 (simulator)
  
  • No issues found!
  </code></pre>
  <p>Also, the Podfile generated by the plugins:</p>
  <pre><code># Uncomment this line to define a global platform for your project
  # platform :ios, '9.0'
  
  # CocoaPods analytics sends network stats synchronously affecting flutter build latency.
  ENV['COCOAPODS_DISABLE_STATS'] = 'true'
  
  project 'Runner', {
    'Debug' =&gt; :debug,
    'Profile' =&gt; :release,
    'Release' =&gt; :release,
  }
  
  def flutter_root
    generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
    unless File.exist?(generated_xcode_build_settings_path)
      raise &quot;#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first&quot;
    end
  
    File.foreach(generated_xcode_build_settings_path) do |line|
      matches = line.match(/FLUTTER_ROOT\=(.*)/)
      return matches[1].strip if matches
    end
    raise &quot;FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get&quot;
  end
  
  require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
  
  flutter_ios_podfile_setup
  
  target 'Runner' do
    use_frameworks!
    use_modular_headers!
  
    flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
  end
  
  post_install do |installer|
    installer.pods_project.targets.each do |target|
      flutter_additional_ios_build_settings(target)
    end
  end
  </code></pre>