under test, not sure no errors

upstream_ref/xllm/cmake/CMakeDetermineRustCompiler.cmake

@@ -0,0 +1,25 @@
+# ported from https://github.com/Devolutions/CMakeRust
+if(NOT CMAKE_Rust_COMPILER)
+	find_package(Rust)
+	if(RUST_FOUND)
+		set(CMAKE_Rust_COMPILER "${RUSTC_EXECUTABLE}")
+		set(CMAKE_Rust_COMPILER_ID "Rust")
+		set(CMAKE_Rust_COMPILER_VERSION "${RUST_VERSION}")
+		set(CMAKE_Rust_PLATFORM_ID "Rust")
+	endif()
+endif()
+
+message(STATUS "Cargo Home: ${CARGO_HOME}")
+message(STATUS "Rust Compiler Version: ${RUSTC_VERSION}")
+
+mark_as_advanced(CMAKE_Rust_COMPILER)
+
+if(CMAKE_Rust_COMPILER)
+	set(CMAKE_Rust_COMPILER_LOADED 1)
+endif(CMAKE_Rust_COMPILER)
+
+configure_file(${CMAKE_CURRENT_LIST_DIR}/CMakeRustCompiler.cmake.in
+	${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${CMAKE_VERSION}/CMakeRustCompiler.cmake IMMEDIATE @ONLY)
+
+set(CMAKE_Rust_COMPILER_ENV_VAR "RUSTC")
+