C++ does not allow zero-sized unions - they end up being of size 1-byte,
which leads to C/C++ compatibility issues, flagged by the compiler.
lib/node/rte_node_mbuf_dynfield.h:78:2: error: union has size 0 in C, size 1
in C++ [-Werror,-Wextern-c-compat]
78 | union {
| ^
1 error generated.
Fix the error by defaulting to a having a 1-byte sized union rather than
zero-sized.
Fixes: 746e8736da70 ("node: add global mbuf dynfield")
Signed-off-by: Bruce Richardson <bruce.richard...@intel.com>
---
lib/node/rte_node_mbuf_dynfield.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/lib/node/rte_node_mbuf_dynfield.h
b/lib/node/rte_node_mbuf_dynfield.h
index b77fdbb94f..35674ca263 100644
--- a/lib/node/rte_node_mbuf_dynfield.h
+++ b/lib/node/rte_node_mbuf_dynfield.h
@@ -26,12 +26,13 @@ extern "C" {
#ifndef RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE
/** Size of persistent mbuf fields */
-#define RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE (0)
+#define RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE (1) /* Must be non-zero to
avoid a zero-sized
+ * union, which causes
C++ compat issues*/
#endif /* !RTE_NODE_MBUF_PERSISTENT_FIELDS_SIZE */
#ifndef RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE
/** Size of overloadable mbuf fields */
-#define RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE (8)
+#define RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE (8)
#endif /* !RTE_NODE_MBUF_OVERLOADABLE_FIELDS_SIZE */
/** Size of node mbuf dynamic field */
--
2.48.1
