1 files changed, 7 insertions, 0 deletions
diff --git a/lib/ccan/list/test/helper.h b/lib/ccan/list/test/helper.h
new file mode 100644
index 0000000000..a09a3a997b
--- /dev/null
+++ b/lib/ccan/list/test/helper.h
@@ -0,0 +1,7 @@
+/* These are in a separate C file so we can test undefined structures. */
+struct opaque;
+typedef struct opaque opaque_t;
+
+opaque_t *create_opaque_blob(void);
+bool if_blobs_know_the_secret(opaque_t *blob);
+void destroy_opaque_blob(opaque_t *blob);