From 17bd6e8faba15812780d21e6e3db08fb26dd7033 Mon Sep 17 00:00:00 2001
From: boarchuz <46267286+boarchuz@users.noreply.github.com>
Date: Sat, 21 Dec 2019 12:12:54 +1100
Subject: [PATCH] Add missing extern "C" to rtc_cntl.h

Related: https://github.com/espressif/arduino-esp32/issues/3149
---
 components/driver/include/driver/rtc_cntl.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/components/driver/include/driver/rtc_cntl.h b/components/driver/include/driver/rtc_cntl.h
index a79745713e..44fd015096 100644
--- a/components/driver/include/driver/rtc_cntl.h
+++ b/components/driver/include/driver/rtc_cntl.h
@@ -18,6 +18,10 @@
 #include "esp_err.h"
 #include "esp_intr_alloc.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * @brief Register a handler for specific RTC_CNTL interrupts
  *
@@ -46,3 +50,7 @@ esp_err_t rtc_isr_register(intr_handler_t handler, void* handler_arg,
  *        handler_arg isn't registered
  */
 esp_err_t rtc_isr_deregister(intr_handler_t handler, void* handler_arg);
+
+#ifdef __cplusplus
+}
+#endif