Any reason llvm12 is hardcoded to use lua 5.3? I tried the following which works fine for my setup with `DEFAULT_VERSIONS+=lua=5.4` in make.conf

commit a8ba2549798325e7d76afa22e04b7c9ba8ea024a
Author: Dimitry Andric <dim@FreeBSD.org>
Date:   Mon May 24 14:35:33 2021 +0200

    devel/llvm12: use any lua for lldb, not lua53 specifically

diff --git a/devel/llvm12/Makefile b/devel/llvm12/Makefile
index 373735bbff6a..431017580806 100644
--- a/devel/llvm12/Makefile
+++ b/devel/llvm12/Makefile
@@ -150,7 +150,7 @@ LLDB_CMAKE_ON=		-DLUA_INCLUDE_DIR=${LOCALBASE}/include/lua${LUA_VER_STR} \
 			-DPANEL_LIBRARIES=/usr/lib/libpanel.so
 LLDB_DESC=		Install lldb, the LLVM debugger
 LLDB_IMPLIES=		CLANG
-LLDB_USES=		lua:53 libedit
+LLDB_USES=		lua libedit
 LLDB_VARS=		_USES_PYTHON=python:3.6+
 OPENMP_DESC=		Install libomp, the LLVM OpenMP runtime library
 OPENMP_PORTDOCS=	openmp