De-duplicate consecutive libs when printing native-static-libs

[Urgau]

This PR adds a de-duplicate step just before printing the native-static-libs.

This step de-duplicates all the consecutive libs based only on the relevant comparison elements (this exclude spans, ast elements, ...).

Fixes #113209

[rustbot]

r? @b-naber

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[bjorn3]

Some libraries need to be present multiple times to handle circular dependencies. Whatever logic you use for this printing please make sure that it also works for rustc doing linking of a dylib or executable too.

[Urgau]

Some libraries need to be present multiple times to handle circular dependencies. Whatever logic you use for this printing please make sure that it also works for rustc doing linking of a dylib or executable too.

As stated in the PR description, this PR only removes consecutive libs and does not touch libs that are present multiple times but not consecutive. That means that instead of generating (before this PR):

-lunwind -lunwind -lunwind -lsystemd -lunwind

we would now generate:

-lunwind -lsystemd -lunwind

Given this I don't think there is any issues with circular dependencies since linker args are still present (just not consecutively duplicated).

[bjorn3]

Right, no objections in that case.

[petrochenkov]

@bors r+

[bors]

📌 Commit ad16606 has been approved by petrochenkov

It is now in the queue for this repository.

[bors]

⌛ Testing commit ad16606 with merge 55be59d...

[bors]

☀️ Test successful - checks-actions
Approved by: petrochenkov
Pushing 55be59d to master...

[rust-timer]

Finished benchmarking commit (55be59d): comparison URL.

Overall result: ✅ improvements - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean	range	count
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.0%	[-3.0%, -3.0%]	1
All ❌✅ (primary)	-	-	0

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)	-	-	0
Regressions ❌ (secondary)	-	-	0
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-2.5%	[-2.5%, -2.4%]	2
All ❌✅ (primary)	-	-	0

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: 657.596s -> 657.74s (0.02%)