Ability to use C libraries #3798
Description
It would be very nice to be able to use C libraries from within Dart (VM only, of course). The specific API isn't especially important; something like Ruby's (http://www.rubycentral.com/pickaxe/ext_ruby.html) or Python's (http://docs.python.org/extending/) extension APIs would work, as would some sort of foreign function interface.
This is important for accessing existing native libraries that are infeasible to rewrite in pure Dart.