mozilla/rust — pull request #8454 by cmr (2013-08-11 17:30:53+00:00)
Title: Add basic support for libstd without a runtime.

To use it, pass `--cfg no_rt` to rustc when building libstd. Not everything is
implemented correctly, and it probably needs to be reworked to use a
zero.rs-like description of the runtime that *does* exist. Careful
consideration and reworking needs to be done to make the libstd able to be run
on bare metal.