Apple M1チップ搭載のMac 環境でCocoaPodsコンパイルエラー

```
% pod install
Analyzing dependencies
... ...

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### Command

/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/bin/pod install


### Report

* What did you do?

* What did you expect to happen?

* What happened instead?


### Stack

   CocoaPods : 1.10.1
        Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin20]
    RubyGems : 3.0.3
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : 


### Plugins

cocoapods-deintegrate : 1.0.4
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-trunk       : 1.5.0
cocoapods-try         : 1.2.0


### Podfile

# Uncomment the next line to define a global platform for your project
platform :ios, '1x.x'

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] == '8.0'
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '9.0'
      end
    end
  end
end

target 'xxxxxx' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!
  inhibit_all_warnings!

  # Core
  pod 'Alamofire', '~> 5.0.4'
  pod 'AlamofireImage', '~> 4.0.3'

  # Google
  pod 'GoogleMaps', '~> 3.8.0'
  pod 'GooglePlaces', '~> 3.8.0'

  # Firebase
  pod 'Firebase/Core'
  pod 'Firebase/Performance'
  pod 'Firebase/Messaging'
  pod 'Firebase/Crashlytics'
  pod 'Firebase/Analytics'
 ... ...


end


### Error


LoadError - dlsym(0x7fd812dc3400, Init_ffi_c): symbol not found - /opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/ffi-1.14.2/lib/ffi_c.bundle
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/ffi-1.14.2/lib/ffi.rb:6:in `rescue in <top (required)>'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/ffi-1.14.2/lib/ffi.rb:3:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/ethon-0.12.0/lib/ethon.rb:2:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/typhoeus-1.4.0/lib/typhoeus.rb:2:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems/core_ext/kernel_require.rb:54:in `require'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/sources_manager.rb:74:in `cdn_url?'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/sources_manager.rb:36:in `create_source_with_url'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/sources_manager.rb:21:in `find_or_create_source_with_url'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer/analyzer.rb:178:in `block in sources'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer/analyzer.rb:177:in `map'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer/analyzer.rb:177:in `sources'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer/analyzer.rb:1073:in `block in resolve_dependencies'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/user_interface.rb:64:in `section'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer/analyzer.rb:1072:in `resolve_dependencies'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer/analyzer.rb:124:in `analyze'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:414:in `analyze'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:239:in `block in resolve_dependencies'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/user_interface.rb:64:in `section'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:238:in `resolve_dependencies'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/installer.rb:160:in `install!'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/command/install.rb:52:in `run'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/lib/cocoapods/command.rb:52:in `run'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/gems/cocoapods-1.10.1/bin/pod:55:in `<top (required)>'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/bin/pod:23:in `load'
/opt/homebrew/Cellar/cocoapods/1.10.1/libexec/bin/pod:23:in `<main>'


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[!] Oh no, an error occurred.

... 省略　。。。

```

解決策：
Step 1
 ターミナル（Terminal）アプリをFinderでアプリケーションディレクトリー上探します。
右クリックして、情報を見るを開きます。
 「Rosettaを使用して開く」にクリックしておきます。

Step 2
ターミナルを再度開いて、以下のコメントを実施します。

```
sudo gem install ffi
```

もし、既存ffiがインストールされた場合、先に

```
sudo gem uninstall ffi　
```
を実施して、再インストールしてます。

Step 3
次に、ターミナルでPodをインストールします。

```
pod install
```



以下のように無事コンパイルされた！

```
Generating Pods project
Integrating client project
Pod installation complete! There are 26 dependencies from the Podfile and 47 total pods installed.
```

蛇の足ですが、場合によって、Macを再起動しないとコンパイルに通らないようです。



英文参照URL：https://github.com/CocoaPods/CocoaPods/issues/9907