Index: head/lib/clang/liblldb/Makefile
===================================================================
--- head/lib/clang/liblldb/Makefile
+++ head/lib/clang/liblldb/Makefile
@@ -679,4 +679,17 @@
 
 INTERNALLIB=
 
+# Building lldb's bindings requires swig, but we do not want to include it in
+# the FreeBSD base system (as a build tool) because it has non-trivial
+# dependencies.  As a workaround we commit the generated file.  Requires the
+# swig30 package.
+#
+# After importing an updated llvm/lldb into FreeBSD run `make run-swig` in
+# this directory to generate generate LLDBWrapLua.cpp, and commit the result.
+.PHONY:	run-swig
+run-swig:
+	swig3.0 -I${LLDB_SRCS}/include \
+	    -c++ -features autodoc -lua -w503 \
+	    -o ${.CURDIR}/LLDBWrapLua.cpp ${LLDB_SRCS}/bindings/lua.swig
+
 .include <bsd.lib.mk>