Allow alteration of the Gem Specification when cross compiling. Closes GH-3

This is useful to indicate a custom requirement message, like DLLs
installation or similar.

  Rake::ExtensionTask.new('my_extension', GEM_SPEC) do |ext|
    ext.cross_compile = true
    ext.cross_compiling do |gem_spec|
      gem_spec.post_install_message = "You've installed a binary version of this gem"
    end
  end

1 files changed, 10 insertions, 0 deletions

diff --git a/spec/lib/rake/extensiontask_spec.rb b/spec/lib/rake/extensiontask_spec.rb
index 8045f0f..0fa55ef 100644
--- a/spec/lib/rake/extensiontask_spec.rb
+++ b/spec/lib/rake/extensiontask_spec.rb
@@ -299,6 +299,16 @@ describe Rake::ExtensionTask do
         err.should match(/no configuration section for specified version of Ruby/)
       end
 
+      it 'should capture an action block to be executed when cross compiling' do
+        lambda {
+          Rake::ExtensionTask.new('extension_one') do |ext|
+            ext.cross_compiling do |gem_spec|
+              gem_spec.post_install_message = "Cross compiled gem"
+            end
+          end
+        }.should_not raise_error
+      end
+
       it 'should allow usage of RUBY_CC_VERSION to indicate a different version of ruby' do
         config = mock(Hash)
         config.should_receive(:[]).with("rbconfig-1.9.1").and_return('/path/to/ruby/1.9.1/rbconfig.rb')