diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..c96040c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "third-party/c-flags"]
+	path = third-party/c-flags
+	url = https://github.com/DieTime/c-flags.git
diff --git a/third-party/c-flags b/third-party/c-flags
new file mode 160000
index 0000000..e73b866
--- /dev/null
+++ b/third-party/c-flags
@@ -0,0 +1 @@
+Subproject commit e73b8666ce88f63e7944244b94b0ed1c0488dab0