Add musl support for MIPS64 & bump to 0.2.63

[xen0n]

Tested with patched stage2; both static and dynamic binaries confirmed working.

Initial CI support in the form of no-core targets are added.

[rust-highfive]

r? @gnzlbg

(rust_highfive has picked a reviewer for you, use r? to override)

[xen0n]

failure is the same as #1450

[xen0n]

The i686 mingw failure seems unrelated.

[bors]

☔ The latest upstream changes (presumably #1376) made this pull request unmergeable. Please resolve the merge conflicts.

[gnzlbg]

So this all looks good to me.

If there is librustc_target support upstream for these, I would prefer if you would add these targets to ci/build.sh (to the LINUX_NIGHTLY_NOCORE env variable), so that we at least test that these build properly.

Once you get libstd support up and running in rust-lang/rust, then it might be worth it to consider adding the run-time tests for these, but that should happen in a future PR, and not here.

[xen0n]

For the record, I for some unknown reason included CI changes in both of the PRs, so neither would build... 🤦‍♂

[gnzlbg]

You can remove the changes to azure.yml here. If you don't want to wait for the target to be available, you can add a .json file here if you want, but since there is a PR upstream already, I'll just wait on this till that lands.

[gnzlbg]

This needs to be updated (e.g. remove the comments in the azure.yml file, or enable those jobs), also, these targets need to be added to the ci/build.sh file (probably to the NIGHTLY_NOCORE list until we start shipping core and/or libstd for these targets).

[xen0n]

Updated. The librustc_target enablement should land today; this should go in afterwards. (And with a version bump.)

[gnzlbg]

@bors: r+

[bors]

📌 Commit da1aca0 has been approved by gnzlbg

[bors]

⌛ Testing commit da1aca0 with merge 832549a...

[xen0n]

Ah. The rustc change didn't make it in, in fact it's still waiting.

Once rust-lang/rust#63165 lands this can be retried; merging of this should be avoided before that.

[bors]

💥 Test timed out

[gnzlbg]

@xen0n while the PR to rust-lang/rust landed, new nightly toolchains are only created approx. once per day, so usually you have to wait until tomorrow. Don't despair ;)

[gnzlbg]

@bors: r+

[bors]

📌 Commit 42139b8 has been approved by gnzlbg

[bors]

⌛ Testing commit 42139b8 with merge dd8f908...

[bors]

💔 Test failed - status-azure

[xen0n]

Turns out I misunderstood the new CI pipeline...

libc/ci/azure-install-rust.yml

Lines 24 to 30 in 4bd0c00

	- script: |
	set -ex
	if [ -n "${TARGET}" ]; then
	rustup target add $TARGET
	fi
	condition: ne( variables['Agent.OS'], 'Windows_NT' )
	displayName: Install target (unix)

It seems any target in the build matrix needs to have std already built. Hence I'm taking the new targets out of the build matrix just like other NO_CORE targets.

[gnzlbg]

It seems any target in the build matrix needs to have std already built.

Yes, you only can do that once you have enabled std support in rust-lang/rust, which needs to happen after the initial changes here (where we only check that the library builds correctly).

[gnzlbg]

@bors: r+

[bors]

📌 Commit 435cdee has been approved by gnzlbg

[bors]

⌛ Testing commit 435cdee with merge 7decbdd...

[xen0n]

We're blocked by #1473. Should we just cherry-pick the build-fixing commit to at least unblock things?

[bors]

💔 Test failed - status-azure

[gnzlbg]

@bors: retry

[bors]

⌛ Testing commit 435cdee with merge 4b610e6...

[bors]

☀️ Test successful - checks-cirrus-freebsd-11, checks-cirrus-freebsd-12, status-azure
Approved by: gnzlbg
Pushing 4b610e6 to master...

[xen0n]

Could this version bump be pushed to crates.io, so I can continue work on upstreaming the corresponding std support?

[gnzlbg]

Sure

[gnzlbg]

Released, sorry for the delay, we had too many time outs the last couple of days.