[PATCH v2 04/11] metrics: fix missing C++ guards

[Brian Dooley <brian.dooley@intel.com>]

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: ciara.power@intel.com
Cc: stable@dpdk.org

Signed-off-by: Brian Dooley <brian.dooley@intel.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

---
v2: Added missing apostrophe to commit message.
---
 lib/metrics/rte_metrics_telemetry.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/metrics/rte_metrics_telemetry.h b/lib/metrics/rte_metrics_telemetry.h
index 2b6eb1ccc8..09b14d9336 100644
--- 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
-- 
2.25.1