added build env for VC++

src/ir_decoder/include/irda_decode.h

@@ -8,9 +8,15 @@ Description:    This file provides algorithms for IR decode
 Revision log:
 * 2016-10-01: created by strawmanbobi
 **************************************************************************************************/
+
 #ifndef _IRDA_DECODE_H_
 #define _IRDA_DECODE_H_
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 #include <stdio.h>
 #include "irda_defs.h"
 
@@ -573,4 +579,8 @@ INT8 get_supported_wind_direction(UINT8* supported_wind_direction);
 
 ///////////////////////////////////////////////// Utils End /////////////////////////////////////////////////
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif // _IRDA_DECODE_H_