diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..6c54e358
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "thirdparty/cppast"]
+	path = thirdparty/cppast
+	url = https://github.com/foonathan/cppast
diff --git a/thirdparty/cppast b/thirdparty/cppast
new file mode 160000
index 00000000..84d39087
--- /dev/null
+++ b/thirdparty/cppast
@@ -0,0 +1 @@
+Subproject commit 84d3908791891c477f9c68fbdb14e6b24e009e40