From 192c20c9f7612f945b0ee43bf7ddef8187446deb Mon Sep 17 00:00:00 2001
From: Ivan Grokhotkov <ivan@espressif.com>
Date: Tue, 5 Nov 2019 14:56:16 +0100
Subject: [PATCH] clk.h: add extern C guards

Closes https://github.com/espressif/esp-idf/issues/4215
---
 components/esp32/include/esp32/clk.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/components/esp32/include/esp32/clk.h b/components/esp32/include/esp32/clk.h
index 9393fc1f5d..613fa5a985 100644
--- a/components/esp32/include/esp32/clk.h
+++ b/components/esp32/include/esp32/clk.h
@@ -15,6 +15,10 @@
 #pragma once
 #include <stdint.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * @file esp32/clk.h
  *
@@ -85,3 +89,7 @@ int esp_clk_xtal_freq(void);
  * @return Value or RTC counter, expressed in microseconds
  */
 uint64_t esp_clk_rtc_time();
+
+#ifdef __cplusplus
+}
+#endif