Demote x86_64-rumprun-netbsd target

[nikic]

The x86_64-rumprun-netbsd is currently a Tier 2 std target built on dist-various-1. In the course of updating that image, I found that the rumprun project appears to be unmaintained. There has been little activity recently (https://github.com/rumpkernel/rumprun) and there are outstanding PRs to fix build issues. The http://www.rumpkernel.org/ domain is down.

It is still possible to build rumprun on newer Ubuntu versions with the following rather minor adjustment:

diff --git a/src/ci/docker/host-x86_64/dist-various-1/build-rumprun.sh b/src/ci/docker/host-x86_64/dist-various-1/build-rumprun.sh
index 103dbbe6fda..bee2d7a476c 100755
--- a/src/ci/docker/host-x86_64/dist-various-1/build-rumprun.sh
+++ b/src/ci/docker/host-x86_64/dist-various-1/build-rumprun.sh
@@ -20,9 +20,10 @@ exit 1
 
 git clone https://github.com/rumpkernel/rumprun
 cd rumprun
-git reset --hard 39a97f37a85e44c69b662f6b97b688fbe892603b
+git reset --hard b04d42225a12a6fae57a78a9c1cf23642e46cd00
 git submodule update --init
 
-CC=cc hide_output ./build-rr.sh -d /usr/local hw
+# Disable -Werror, to avoid breaking the build with newer compilers.
+CC=cc NOGCCERROR=1 hide_output ./build-rr.sh -d /usr/local hw
 cd ..
 rm -rf rumprun

However, I question the utility of keeping an unmaintained project as a Tier 2 target.

[nagisa]

Nominating for T-compiler discussion. I suspect that the team will be comfortable with the demotion unless somebody expresses a justified reason why the demotion should not be demoted.

[apiraino]

agreed to demote and drop support during compiler team meeting

[nagisa]

We discussed this during the @rust-lang/compiler meeting today.

This FCP is for the removal of this target from rustc. We felt that this target is somewhat similar to the Windows XP situation, support for which was removed recently as part of this MCP in that the target is unmaintained for long enough that removing it is well warranted.

@rfcbot fcp merge

[rfcbot]

Team member @nagisa has proposed to merge this. The next step is review by the rest of the tagged team members:

• @davidtwco
• @eddyb
• @estebank
• @lcnr
• @matthewjasper
• @nagisa
• @nikomatsakis
• @oli-obk
• @petrochenkov
• @pnkfelix
• @varkor
• @wesleywiser

No concerns currently listed.

Once a majority of reviewers approve (and at most 2 approvals are outstanding), this will enter its final comment period. If you spot a major issue that hasn't been raised at any point in this process, please speak up!

See this document for info about what commands tagged team members can give me.

[rfcbot]

🔔 This is now entering its final comment period, as per the review above. 🔔