IDF release/v4.0 08219f3cf

tools/sdk/include/lwip/netif/ppp/pppcrypt.h

@@ -44,6 +44,10 @@
  */
 #include "lwip/arch.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * Map hashes and ciphers functions to PolarSSL
  */
@@ -131,6 +135,10 @@
 
 void pppcrypt_56_to_64_bit_key(u_char *key, u_char *des_key);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* PPPCRYPT_H */
 
 #endif /* PPP_SUPPORT */