[Validator] Lint dynamic libs for iOS > 7.

CHANGELOG.md

@@ -25,6 +25,10 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
   [Boris Bügling](https://github.com/neonichu)
   [#3194](https://github.com/CocoaPods/CocoaPods/issues/3194)
 
+* Lint to prevent dynamic libraries and frameworks from passing with iOS 7.  
+  [Boris Bügling](https://github.com/neonichu)
+  [#3193](https://github.com/CocoaPods/CocoaPods/issues/3193)
+
 
 ## 0.36.0.rc.1
 

lib/cocoapods/validator.rb

@@ -213,6 +213,7 @@ module Pod
         @consumer = spec.consumer(platform)
         setup_validation_environment
         install_pod
+        validate_vendored_dynamic_frameworks
         build_pod
         check_file_patterns
         tear_down_validation_environment
@@ -322,6 +323,19 @@ module Pod
       config.silent
     end
 
+    def validate_vendored_dynamic_frameworks
+      deployment_target = spec.subspec_by_name(subspec_name).deployment_target(consumer.platform_name)
+
+      unless file_accessor.nil?
+        dynamic_frameworks = file_accessor.vendored_frameworks.select { |fw| `file #{fw + fw.basename('.framework')} 2>&1` =~ /dynamically linked/ }
+        dynamic_libraries = file_accessor.vendored_libraries.select { |lib| `file #{lib} 2>&1` =~ /dynamically linked/ }
+        if (dynamic_frameworks.count > 0 || dynamic_libraries.count > 0) && consumer.platform_name == :ios &&
+            (deployment_target.nil? || Version.new(deployment_target).major < 8)
+          error('dynamic', 'Dynamic frameworks and libraries are only supported on iOS 8.0 and onwards.')
+        end
+      end
+    end
+
     # Performs platform specific analysis. It requires to download the source
     # at each iteration
     #

spec/unit/validator_spec.rb

@@ -485,6 +485,22 @@ module Pod
       end
     end
 
+    describe 'dynamic binaries validation' do
+      it 'fails with dynamic binaries on iOS < 8' do
+        podspec = stub_podspec(/.*license.*$/, '"license": "Public Domain",')
+        file = write_podspec(podspec)
+
+        Pod::Sandbox::FileAccessor.any_instance.stubs(:vendored_libraries).returns([fixture('empty.dylib')])
+        validator = Validator.new(file, SourcesManager.master.map(&:url))
+        validator.stubs(:build_pod)
+        validator.stubs(:validate_url)
+        validator.validate
+
+        validator.results.map(&:to_s).first.should.match /Dynamic frameworks.*iOS 8.0 and onwards/
+        validator.result_type.should == :error
+      end
+    end
+
     describe 'swift validation' do
       def test_swiftpod
         podspec = stub_podspec(/.*source_files.*/, '"source_files": "*.swift",')