# * check-stage$(stage)-$(crate) - Test a crate in a specific stage
# * check-stage$(stage)-{rpass,rfail,cfail,rmake,...} - Run tests in src/test/
# * check-stage1-T-$(target)-H-$(host) - Run cross-compiled-tests
+# * tidy-basic - show file / line stats
+# * tidy-errors - show the highest rustc error code
+# * tidy-features - show the status of language and lib features
#
# Then mix in some of these environment variables to harness the
# ultimate power of The Rust Build System.