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chore: Native decide dynlib #43

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Merged
samuelburnham merged 2 commits into from
Aug 19, 2026
Merged

chore: Native decide dynlib #43

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f8e1269
rust: also build blake3-rs as a cdylib
samuelburnham Aug 4, 2026
730f910
lake: add blake3_rs_shared target for the cdylib output
samuelburnham Aug 4, 2026
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9 changes: 9 additions & 0 deletions lakefile.lean
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Expand Up @@ -87,3 +87,12 @@ lean_lib Blake3Rust where
roots := #[`Blake3.Rust]
moreLinkObjs := #[blake3_rs]

/-- The `blake3-rs` shared library. Produced by the same `cargo build` as
`blake3_rs`; this target selects the `cdylib` output for downstream tooling
that loads the raw `rs_blake3_*` symbols at runtime rather than linking them
statically — e.g. supplying the BLAKE3 backend to Lean's native evaluator for
`native_decide` proofs. -/
target blake3_rs_shared pkg : System.FilePath := do
proc { cmd := "cargo", args := #["build", "--release"], cwd := pkg.dir / "rust" } (quiet := true)
inputBinFile $ pkg.dir / "rust" / "target" / "release" / nameToSharedLib "blake3_rs"

6 changes: 5 additions & 1 deletion rust/Cargo.toml
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Expand Up @@ -8,7 +8,11 @@ version = "0.1.0"
edition = "2024"

[lib]
crate-type = ["staticlib"]
# `staticlib` is linked into final Lean executables. `cdylib` additionally
# builds a position-independent shared object exporting the raw `rs_blake3_*`
# symbols, so they can be loaded at runtime — e.g. by Lean's native evaluator
# for `native_decide` proofs elaborated before any executable is linked.
crate-type = ["staticlib", "cdylib"]

[dependencies]
blake3 = "1.8.4"
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