From d269c239486c696ddec5fd390ba1a8e781386f1c Mon Sep 17 00:00:00 2001
From: Patrick Pelissier <Patrick.Pelissier@gmail.com>
Date: Fri, 16 Mar 2018 23:00:46 +0100
Subject: [PATCH] Remove warning with C++. It'll will increase the size of the
 type a little bit. TODO: Check compatibility between code using C def and
 code using C++ def

---
 m-deque.h | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/m-deque.h b/m-deque.h
index 07da13cd..203d5b26 100644
--- a/m-deque.h
+++ b/m-deque.h
@@ -46,6 +46,14 @@
 
 #define DEQUEUI_DEFAULT_SIZE  8
 
+/* C++ doesn't support flexible array within a structure.
+   Let's define at least one element. */
+#ifdef __cplusplus
+# define DEQUEI_MIN_ARRAY_SIZE 1
+#else
+# define DEQUEI_MIN_ARRAY_SIZE 
+#endif
+
 #define DEQUEI_CONTRACT(d) do {						\
     assert ((d) != NULL);						\
     assert ((d)->default_size >= DEQUEUI_DEFAULT_SIZE);			\
@@ -66,7 +74,7 @@
   typedef struct M_C(name, _node_s) {					\
     ILIST_INTERFACE(M_C(name, _node_list), struct M_C(name, _node_s));	\
     size_t size;							\
-    type  data[];							\
+    type  data[DEQUEI_MIN_ARRAY_SIZE];					\
   } node_t;								\
 									\
   ILIST_DEF(M_C(name, _node_list), node_t, (DEL(M_GET_FREE oplist)) )	\