add a test

src/Lean/Runtime.lean

@@ -20,4 +20,10 @@ def closureMaxArgs : Nat :=
 def maxSmallNat : Nat :=
   maxSmallNatFn ()
 
+@[extern "lean_libuv_version"]
+opaque libUvVersionFn : Unit → Nat
+
+def libUvVersion : Nat :=
+  libUvVersionFn ()
+
 end Lean

src/runtime/CMakeLists.txt

@@ -2,7 +2,7 @@ set(RUNTIME_OBJS debug.cpp thread.cpp mpz.cpp utf8.cpp
 object.cpp apply.cpp exception.cpp interrupt.cpp memory.cpp
 stackinfo.cpp compact.cpp init_module.cpp load_dynlib.cpp io.cpp hash.cpp
 platform.cpp alloc.cpp allocprof.cpp sharecommon.cpp stack_overflow.cpp
-process.cpp object_ref.cpp mpn.cpp mutex.cpp)
+process.cpp object_ref.cpp mpn.cpp mutex.cpp libuv.cpp)
 add_library(leanrt_initial-exec STATIC ${RUNTIME_OBJS})
 set_target_properties(leanrt_initial-exec PROPERTIES
   ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})

src/runtime/libuv.cpp

@@ -0,0 +1,11 @@
+/*
+Copyright (c) 2024 Lean FRO, LLC. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+
+Author: Markus Himmel
+*/
+#include "runtime/libuv.h"
+
+extern "C" LEAN_EXPORT lean_obj_res lean_libuv_version(lean_obj_arg o) {
+    return lean_unsigned_to_nat(uv_version());
+}

src/runtime/libuv.h

@@ -0,0 +1,11 @@
+/*
+Copyright (c) 2024 Lean FRO, LLC. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+
+Author: Markus Himmel
+*/
+#pragma once
+#include <lean/lean.h>
+#include <uv.h>
+
+extern "C" LEAN_EXPORT lean_obj_res lean_libuv_version(lean_obj_arg);

tests/lean/run/libuv.lean

@@ -0,0 +1,6 @@
+import Lean.Runtime
+
+-- 77824 -> 0x013000 -> 0x01.0x30.0x00 -> 1.48.0
+/-- info: 77824 -/
+#guard_msgs in
+#eval Lean.libUvVersion