metrics: add missing C++ guards

Some public header files were missing 'extern "C"' C++ guards,
and couldn't be used by C++ applications. Add the missing guards.

Fixes: c5b7197f662e ("telemetry: move some functions to metrics library")
Cc: stable@dpdk.org
Signed-off-by: Brian Dooley <brian.dooley@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

diff --git a/lib/metrics/rte_metrics_telemetry.h b/lib/metrics/rte_metrics_telemetry.h
index 2b6eb1ccc8487b47163e0cd6484ef49869f03c83..09b14d93368ff7b6a21a79fab17ce403b94ac84a 100644 (file)
--- a/lib/metrics/rte_metrics_telemetry.h
+++ b/lib/metrics/rte_metrics_telemetry.h
@@ -13,6 +13,9 @@
 #ifndef _RTE_METRICS_TELEMETRY_H_
 #define _RTE_METRICS_TELEMETRY_H_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 enum rte_telemetry_stats_type {
        PORT_STATS = 0,
@@ -60,4 +63,8 @@ __rte_experimental
 int32_t
 rte_metrics_tel_extract_data(struct telemetry_encode_param *ep, json_t *data);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif