Suggestion: Native compilation should have option to use Rake compiler

[johnnyshields]

Many gems today are using Rake Compiler Dock to build their native gems; it seems to be becoming a de-facto standard. Since it uses Docker, it guarantees the correct libraries, etc. are present to build the gem.

It would be very nice if Rubygems provided a way that native compilation could be done with Rake Compiler Dock, perhaps by adding some standardization to the gemspec. Ultimately, if done right, this would save a ton of build headaches for many users; at least for me, native compilation is one of the most frustrating aspects of installing gems.

Just an idea.