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Lean 4 fork for HoTT-compatible kernel extensions (Path types, transport, HITs). Maintained against upstream leanprover/lean4.
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Keith Seim ba33c3daa4
fix: match stub signature of lean_uv_dns_get_info to real implementation (#13234) 
This PR fixes a build issue when Lean is not linked against libuv.

## Problem

In `src/runtime/uv/dns.cpp`, the non-libuv stub of
`lean_uv_dns_get_info` (in the `#else` branch, compiled when building
without libuv) has a **4-parameter** signature:

```cpp
lean_uv_dns_get_info(b_obj_arg name, b_obj_arg service, uint8_t family, int8_t protocol)
```

But the real implementation above the `#else` has only **3 parameters**:

```cpp
lean_uv_dns_get_info(b_obj_arg name, b_obj_arg service, uint8_t family)
```

The Lean `@[extern]` declaration also expects 3 parameters. The stub has
an extra `int8_t protocol` parameter that the real function and the Lean
FFI caller do not use.

## Fix

Remove the extra `protocol` parameter from the stub so both branches
have the same signature.

## Evidence

Discovered while building Lean4 to WASM via Emscripten for a production
project ([specify-lean](https://github.com/kjsdesigns/specify)) since
v4.27.0. The stub branch is compiled in this configuration, and the
signature mismatch was caught at link time. The fix has been stable in
production across multiple Lean version bumps.

Related: [Zulip thread on WASM build
fixes](https://leanprover.zulipchat.com/#narrow/channel/270676-lean4/topic/WASM.20build.20fixes.3A.20libuv.20symbol.20leakage.20.28.236817.29.20and.20unique_lo/with/580836892)
(2026-03-21).

Co-authored-by: Keith Seim <keith@MacBook-Pro.local>
2026-04-07 09:39:53 +00:00
.claude chore: add safety notes to release command (#13225) 2026-04-01 05:01:00 +00:00
.github fix: make -DLEAN_VERSION_* CMake overrides actually work (#13226) 2026-04-01 05:31:23 +00:00
.vscode chore: fixes from #13103 "enable separate codegen" (#13241) 2026-04-02 11:13:22 +00:00
doc chore: strip binaries only in release builds (#13208) 2026-03-31 17:18:43 +00:00
images
releases_drafts chore: remove stale release draft notes (#12518) 2026-02-17 19:56:23 +00:00
script chore: add leansqlite to release repos (#13293) 2026-04-07 08:54:42 +00:00
src fix: match stub signature of lean_uv_dns_get_info to real implementation (#13234) 2026-04-07 09:39:53 +00:00
stage0 chore: update stage0 2026-04-05 00:39:54 +00:00
tests feat: add Sym.Arith infrastructure for arithmetic normalization (#13289) 2026-04-06 05:21:09 +00:00
.gitattributes chore: migrate more tests to new test suite (#12809) 2026-03-06 16:52:01 +00:00
.gitignore chore: replace workspace file with .vscode/ settings (#12770) 2026-03-04 01:10:04 +00:00
.gitpod.Dockerfile
.gitpod.yml chore: strip binaries only in release builds (#13208) 2026-03-31 17:18:43 +00:00
.ignore
CMakeLists.txt chore: disable flaky tests (#13253) 2026-04-02 12:59:59 +00:00
CMakePresets.json chore: strip binaries only in release builds (#13208) 2026-03-31 17:18:43 +00:00
CODEOWNERS chore: make @hargoniX code owner of the compiler (#10732) 2025-10-10 04:43:38 +00:00
CONTRIBUTING.md chore: migrate pkg tests (#12889) 2026-03-11 18:55:46 +00:00
flake.lock chore: update to c++20 (#12117) 2026-02-11 01:17:40 +00:00
flake.nix chore: add aarch64-darwin to flake (#12915) 2026-03-18 15:55:34 +00:00
lean-toolchain chore: relative lean-toolchains (#12652) 2026-02-25 10:23:35 +00:00
LICENSE
LICENSES feat: bundle leantar with Lean (#12822) 2026-03-09 20:10:59 +00:00
README.md doc: update URLs that are currently pointing to redirects (#10397) 2025-09-17 15:50:07 +00:00
RELEASES.md

README.md

This is the repository for Lean 4.

About

Installation

See Install Lean.

Contributing

Please read our Contribution Guidelines first.

Building from Source

See Building Lean.