Add the empty lines at the end of the sources so clang won't whine and compile. :)

src/audio.c

@@ -108,4 +108,4 @@ int audio_write(audio_t *aud, const unsigned char *input, int input_len) {
     }
 
     return 0;
-}
+}

src/audio.h

@@ -22,4 +22,4 @@ int audio_destroy(audio_t *aud);
 int audio_read(audio_t *aud, unsigned char *output, int output_len);
 int audio_write(audio_t *aud, const unsigned char *input, int input_len);
 
-#endif /* _AUDIO_H_ */
+#endif /* _AUDIO_H_ */

src/crypt.c

@@ -199,4 +199,4 @@ void crypt_session_destroy(crypt_session_t *const s) {
     sodium_memzero(s->tx, CRYPT_SESS_KEY_LEN);
     sodium_memzero(s->nonce, CRYPT_NONCE_LEN);
     crypt_key_destroy(s->remote_key);
-}
+}

src/crypt.h

@@ -57,4 +57,4 @@ unsigned char *crypt_session_encrypt(crypt_session_t *const s, const unsigned ch
 unsigned char *crypt_session_decrypt(crypt_session_t *const s, const unsigned char *const c, unsigned long long clen, unsigned long long *mlen);
 void crypt_session_destroy(crypt_session_t *const s);
 
-#endif /* _CRYPT_H_ */
+#endif /* _CRYPT_H_ */

src/main.c

@@ -155,4 +155,4 @@ cleanup:
     net_destroy(&nc);
 
     return rt;
-}
+}

src/net.h

@@ -16,4 +16,4 @@ void net_destroy(net_t *n);
 ssize_t net_send(net_t *const n, const char *const buf, int buf_len);
 ssize_t net_recv(net_t *const n, void *const buf, size_t buf_len);
 
-#endif /* _NET_H_ */
+#endif /* _NET_H_ */