Target Compatibility: Targets accepted by rustc but not config.sub

[connor horman]

Hello.

Based on some discussion on the rust-lang zulip forum "Deprecating target_vendor", a couple weeks ago I compiled a list of targets which are accepted by the official rust compiler, rustc (https://github.com/rust-lang/rust, https://doc.rust-lang.org/nightly/rustc/targets/index.html), but not by config.sub, however I neglected to post the list anywhere.

Of the 167 targets that rustc accepts, 52 are not accepted. Attached is the list of the unaccepted targets (unsupported). I have also attached the output from config.sub in the failing cases (comprehensive), as well as the script used to generate the list (test-rustc-targets). 

comprehensive
Description: Binary data

unsupported
Description: Binary data

test-rustc-targets
Description: Binary data