Do not try to statically link libstdc++ on Solaris

[gco]

Fixes #97260

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @Mark-Simulacrum (or someone else) soon.

Please see the contribution instructions for more information.

[jyn514]

Solaris generally prefers dynamic linking and does not ship system libraries in static form. There are no first-party packages to install to get a static libstdc++, only shared objects are provided.

@bors r+ rollup=iffy

[bors]

📌 Commit 6f0d614 has been approved by jyn514

[jyn514]

(I think it's technically possible for someone to provide their own static libc++ on Solaris, but that seems quite rare and they can always patch bootstrap or open an issue if necessary.)

[bors]

⌛ Testing commit 6f0d614 with merge c3b7d7b...

[bors]

☀️ Test successful - checks-actions
Approved by: jyn514
Pushing c3b7d7b to master...

[rust-timer]

Finished benchmarking commit (c3b7d7b): comparison url.

Instruction count

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

Max RSS (memory usage)

Results

• Primary benchmarks: no relevant changes found
• Secondary benchmarks: 😿 relevant regression found

	mean1	max	count2
Regressions 😿 (primary)	N/A	N/A	0
Regressions 😿 (secondary)	2.6%	2.6%	1
Improvements 🎉 (primary)	N/A	N/A	0
Improvements 🎉 (secondary)	N/A	N/A	0
All 😿🎉 (primary)	N/A	N/A	0

Cycles

Results

• Primary benchmarks: no relevant changes found
• Secondary benchmarks: 😿 relevant regressions found

	mean1	max	count2
Regressions 😿 (primary)	N/A	N/A	0
Regressions 😿 (secondary)	2.8%	3.5%	2
Improvements 🎉 (primary)	N/A	N/A	0
Improvements 🎉 (secondary)	N/A	N/A	0
All 😿🎉 (primary)	N/A	N/A	0

If you disagree with this performance assessment, please file an issue in rust-lang/rustc-perf.

@rustbot label: -perf-regression

Footnotes

1. the arithmetic mean of the percent change ↩ ↩²

2. number of relevant changes ↩ ↩²