Switch to LLD as default linker for loongarch64-unknown-none*

[heiher]

The LLD already supports LoongArch, it's time to switch to LLD as default linker for loongarch64-unknown-none*.

[rustbot]

r? @b-naber

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[rustbot]

These commits modify compiler targets.
(See the Target Tier Policy.)

[b-naber]

I think this requires an MCP.

[heiher]

Hello, @b-naber Thanks for your comments. Before this, a explicit linker argument is required for this target. And now the linker argument is just optional. I think this is not a compatibility-breaking change, and referring to previous similar changes, I didn't find a related MCP: #109721

[b-naber]

Thanks for looking this up.

@bors r+

[bors]

📌 Commit 815868d has been approved by b-naber

It is now in the queue for this repository.

[bors]

⌛ Testing commit 815868d with merge fd9525a...

[bors]

☀️ Test successful - checks-actions
Approved by: b-naber
Pushing fd9525a to master...

[rust-timer]

Finished benchmarking commit (fd9525a): comparison URL.

Overall result: no relevant changes - no action needed

@rustbot label: -perf-regression

Instruction count

This benchmark run did not return any relevant results for this metric.

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	2.5%	[1.5%, 3.9%]	7
Regressions ❌ (secondary)	2.3%	[2.3%, 2.3%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	2.5%	[1.5%, 3.9%]	7

Cycles

This benchmark run did not return any relevant results for this metric.

Binary size

This benchmark run did not return any relevant results for this metric.

Bootstrap: 631.653s -> 632.523s (0.14%)
Artifact size: 346.73 MiB -> 346.66 MiB (-0.02%)