[2kai2kai2]

We need to add -crt-static so musl targets don't require static linking of libc

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Project	Deployment	Actions	Updated (UTC)
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[coderabbitai]

📝 Walkthrough

Walkthrough

The PR updates musl bridge_cffi cdylib builds to forward RUSTFLAGS through cross and disable static CRT, producing dynamically linked .so artifacts for future dlopen smoke testing.

Changes

Musl cdylib build

Layer / File(s)	Summary
Forward musl build flags baml_language/Cross.toml	Adds target-specific RUSTFLAGS passthrough configuration for x86_64 and aarch64 musl builds.
Build dynamic musl cdylibs .github/workflows/build2-bridge-cffi.reusable.yaml	Applies -C target-feature=-crt-static for musl targets while preserving existing flags, and clarifies musl build and validation notes.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• BoundaryML/baml#4037: Introduces the workflow and musl configuration refined by this PR.

Poem

A rabbit hops where musl winds blow,
Flags pass through, and cdylibs grow.
Static roots are set aside,
A dynamic .so takes stride.
For dlopen tests, ears perk bright!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title accurately summarizes the main change: fixing the cffi cdylib build for musl targets.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch kai/cffi-release

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[github-actions]

⏭️ Performance benchmarks were skipped

Perf benchmarks (CodSpeed) are opt-in on pull requests — they no longer run on every push. They always run automatically after merge to canary/main.

To run them on this PR, do any of the following, then push a commit (or re-run CI):

• Add RUN_CODSPEED=1 to the PR description, or
• Include run-perf or /perf in the PR title or any commit message.

[github-actions]

Binary size checks passed

✅ 7 passed

	Artifact	Platform	File	Gzip	Gated on	Baseline	Delta	Status
✅	baml-cli	Linux	🔒 22.8 MB	9.7 MB	file	22.8 MB	+54.9 KB (+0.2%)	OK
✅	packed-program	Linux	🔒 16.3 MB	6.8 MB	file	16.3 MB	+20.5 KB (+0.1%)	OK
✅	baml-cli	macOS	🔒 17.6 MB	8.5 MB	file	17.5 MB	+49.7 KB (+0.3%)	OK
✅	packed-program	macOS	🔒 12.6 MB	6.0 MB	file	12.6 MB	+16 B (+0.0%)	OK
✅	baml-cli	Windows	🔒 19.1 MB	8.7 MB	file	18.7 MB	+412.2 KB (+2.2%)	OK
✅	packed-program	Windows	🔒 13.5 MB	6.1 MB	file	13.5 MB	+4.1 KB (+0.0%)	OK
✅	bridge_wasm	WASM	15.2 MB	🔒 4.3 MB	gzip	4.3 MB	+3.6 KB (+0.1%)	OK

🔒 = the size this artifact is GATED on (ceiling + delta). Binaries gate on file size (installed binary); WASM gates on gzip (download size). The other size is shown for information only.

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Generated by cargo size-gate · workflow run