Add Podfile#link_with which takes a target (or an array of targets) to link the library with.

lib/cocoapods/podfile.rb

 module Pod
   class Podfile
     class TargetDefinition
-      attr_reader :name, :parent, :target_dependencies
+      attr_reader :name, :target_dependencies
       
-      def initialize(name, parent = nil)
-        @name, @parent, @target_dependencies = name, parent, []
+      attr_accessor :link_with, :parent
+
+      def initialize(name, options = {})
+        @name, @target_dependencies = name, []
+        options.each { |k, v| send("#{k}=", v) }
+      end
+
+      def link_with=(targets)
+        @link_with = targets.is_a?(Array) ? targets : [targets]
       end
 
       def lib_name
@@ -59,6 +66,10 @@ module Pod
       platform ? @platform = Platform.new(platform, options) : @platform
     end
 
+    def link_with(targets = nil)
+      targets ? @target_definition.link_with = targets : @target_definition.link_with
+    end
+
     # Specifies a dependency of the project.
     #
     # A dependency requirement is defined by the name of the Pod and _optionally_
@@ -156,8 +167,8 @@ module Pod
       @target_definition.target_dependencies << Dependency.new(*name_and_version_requirements, &block)
     end
 
-    # Specifies that a BridgeSupport metadata should be generated from the
-    # headers of all installed Pods.
+    # Specifies that a BridgeSupport metadata document should be generated from
+    # the headers of all installed Pods.
     #
     # This is for scripting languages such as MacRuby, Nu, and JSCocoa, which use
     # it to bridge types, functions, etc better.
@@ -193,7 +204,8 @@ module Pod
     # dependency (JSONKit).
     def target(name, options = {})
       parent = @target_definition
-      @target_definitions[name] = @target_definition = TargetDefinition.new(name, options[:exclusive] ? nil : parent)
+      options[:parent] = parent unless options.delete(:exclusive)
+      @target_definitions[name] = @target_definition = TargetDefinition.new(name, options)
       yield
     ensure
       @target_definition = parent

spec/unit/podfile_spec.rb

@@ -74,7 +74,7 @@ describe "Pod::Podfile" do
           dependency 'SSZipArchive'
         end
 
-        target :test, :exclusive => true do
+        target :test, :exclusive => true, :link_with => 'TestRunner' do
           dependency 'JSONKit'
           target :subtarget do
             dependency 'Reachability'
@@ -115,6 +115,16 @@ describe "Pod::Podfile" do
       target.lib_name.should == 'Pods-test-subtarget'
       target.dependencies.should == [Pod::Dependency.new('Reachability'), Pod::Dependency.new('JSONKit')]
     end
+
+    it "leaves the name of the target, to link with, to be automatically resolved" do
+      target = @podfile.target_definitions[:default]
+      target.link_with.should == nil
+    end
+
+    it "returns the name of the explicit target to link with" do
+      target = @podfile.target_definitions[:test]
+      target.link_with.should == ['TestRunner']
+    end
   end
 
   describe "concerning validations" do