Make x86_64-linux-kernel target be tier-2

[alex]

This would mean compiling libcore in CI, and publishing those artifacts. This would add a lot of value to the efforts to get Rust support into the mainline kernel, since it will mean all the building can be done with just cargo, no 3rd party tools.

I'm happy to do whatever work is needed to wire this up, but I wasn't sure what code needs changing to make this happen! If someone can point me the right way, or just to a previous PR that moved something to tier-2, I'll run from there!

cc: @joshtriplett

[Centril]

Already? We landed the -linux-kernel target like 1 hour ago...

[alex]

If there's a preference for letting it sit for a while first, I'll of course defer to that. It was built entirely on an out of tree target that'd been stable for a while, so I expect it will be too :-)

…

On Thu, Sep 5, 2019, 12:15 PM Mazdak Farrokhzad ***@***.***> wrote: Already? We landed the -linux-kernel target like 1 hour ago... — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#64183?email_source=notifications&email_token=AAAAGBBOMSUUBERXWSWTG33QIE5BHA5CNFSM4IUAC2S2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5772QY#issuecomment-528481603>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAAAGBDFONZDB7NHW6LZDNTQIE5BHANCNFSM4IUAC2SQ> .

[joshtriplett]

We want to get there eventually, but I expect this will need to wait for a while. We should find out everything needed to make this tier 2, but I do think it'll need to wait until we have the solution a little more complete.

[alex]

Is there a good checkpoint I should consider for coming back to this?

[jonas-schievink]

cc rust-lang/rfcs#2803

Closing since I don't think it's terribly useful to keep this issue open.