環境

Mac OS X 10.11.6 (英語)
Xcode 7.3.1
Cocos2d-x 3.13.1
CocoaPods 1.0.0

CocoaPod 作成手順

ヘッダーファイルとライブラリを cocos2d-x からコピー

 $ mkdir pod-cocos2d-x-kenichi-3.13.1.0
 $ cd pod-cocos2d-x-kenichi-3.13.1.0
 $ mkdir Headers
 $ (cd ../cocos2d-x-3.13.1/cocos; tar cf - `find . -name '*.h' -not -path '*/android/*'`) | (cd Headers; tar xzf -)
 $ (cd ../cocos2d-x-3.13.1/cocos; tar cf - `find . -name '*.inl'`) | (cd Headers; tar xzf -)


 $ mkdir Libraries
 $ cp -p "../cocos2d-x-3.13.1/build/libcocos2d iOS.a" Libraries/libcocos2d-iOS.a

tar してアップロード

 $ cd ..
 $ tar cjf pod-cocos2d-x-kenichi-3.13.1.0.tar.bz2 pod-cocos2d-x-kenichi-3.13.1.0

pod-cocos2d-x-kenichi-3.13.1.0.podspec を作成してアップロード

 Pod::Spec.new do |s|
   s.name         = "cocos2d-x-kenichi"
   s.version      = "3.13.1.0"
   s.summary      = "cocos2d-x prebuild libraries for armv7, armv7s, arm64, i386, x86_64"
   s.author       = "Kenichi"
   s.license      = "MIT"
   s.homepage     = "http://52.197.254.50/kenichi"
   s.platform     = :ios, "8.0"
   s.source       = { :http => "http://52.197.254.50/kenichi/pod-cocos2d-x-kenichi-3.13.1.0.tar.bz2", :type => :tbz }
   s.preserve_paths = "Headers/**/*.{h,inl}"
   s.public_header_files = "Headers/**/*.{h,inl}"
   s.header_mappings_dir = "Headers"
   s.vendored_libraries = 'Libraries/libcocos2d-iOS.a' # CocoaPods-1.0.0 messes up OTHER_LDFLAGS in xcconfig if the path contains a space
   s.frameworks = [ "AudioToolbox", "CoreMotion", "AVFoundation", "GameController", "MediaPlayer", "OpenAL" ] # AVFoundation, GameController, MediaPlayer, OpenAL are needed because CocoaPods adds -ObjC flag
   s.libraries = [ "z", "iconv" ]
   s.xcconfig = { 'GCC_PREPROCESSOR_DEFINITIONS' => 'USE_FILE32API CC_ENABLE_CHIPMUNK_INTEGRATION=1' } # TODO: COCOS2D_DEBUG=1 should also be added for Debug configuration
 end

cocos2d-x の static ライブラリをビルドしたものを使った
ライブラリファイル名がスペースを含むと CocoaPods-1.0.0 は間違った xcconfig ファイルを生成してしまうので - に置換した
source の :type を指定しないと Unsupported file type エラー

CocoaPod 利用手順

Podfile を作成

 platform :ios, '8.0'
 use_frameworks!

 target 'ios-storyboard-cocos2dx' do
   pod 'cocos2d-x-kenichi', :podspec => 'http://10.10.10.10/kenichi/pod-cocos2d-x-kenichi-3.13.1.0.podspec'
 end

Pod をインストール

 $ pod install
 Analyzing dependencies
 Fetching podspec for `cocos2d-x-kenichi` from `https://onedrive.live.com/download?cid=9F527730D70015D4&resid=9F527730D70015D4%21109&authkey=AAQFXJwi2CGgHO0`
 Downloading dependencies
 Installing cocos2d-x-kenichi 3.13.1.0
 Generating Pods project
 Integrating client project

 [!] Please close any current Xcode sessions and use `ios-storyboard-cocos2dx.xcworkspace` for this project from now on.
 Sending stats
 Pod installation complete! There is 1 dependency from the Podfile and 1 total pod installed.

おまけ: Podfile に以下を追加して Debug 時に COCOS2D_DEBUG=1 を定義したかったが、効かなかった

 post_install do |installer|
   installer.pods_project.targets.each do |target|
     target.build_configurations.each do |config|
 	  config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] = ['COCOS2D_DEBUG=1']
     end
   end
 end