Merge branch 'fix/cpp_support' into 'master'

minor: Fix support for cpp

See merge request app-frameworks/esp-rainmaker!312

Author: shahpiyushv

Diff for: examples/common/app_insights/app_insights.h

@@ -9,9 +9,17 @@
 #include <stdint.h>
 #include <esp_err.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* Enable ESP Insights in the application
  *
  * @return ESP_OK on success.
  * @return error in case of failure.
  */
 esp_err_t app_insights_enable(void);
+
+#ifdef __cplusplus
+}
+#endif

Diff for: examples/common/app_reset/app_reset.h

@@ -10,6 +10,10 @@
 #include <esp_err.h>
 #include <iot_button.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** Create a button handle
  *
  * This is just a wrapper over iot_button_create(). This can be used to register
@@ -40,3 +44,7 @@ button_handle_t app_reset_button_create(gpio_num_t gpio_num, button_active_t act
  * @return error in case of failure.
  */
 esp_err_t app_reset_button_register(button_handle_t btn_handle, uint8_t wifi_reset_timeout, uint8_t factory_reset_timeout);
+
+#ifdef __cplusplus
+}
+#endif

Diff for: examples/common/app_wifi/app_wifi.h

@@ -9,6 +9,10 @@
 #include <esp_err.h>
 #include <esp_event.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /** ESP RainMaker Event Base */
 ESP_EVENT_DECLARE_BASE(APP_WIFI_EVENT);
 
@@ -36,3 +40,7 @@ typedef enum {
 
 void app_wifi_init();
 esp_err_t app_wifi_start(app_wifi_pop_type_t pop_type);
+
+#ifdef __cplusplus
+}
+#endif