extern char* crypt_getpwdreloadfilename(void);

                                        ^^^^

src/include/libpq/crypt.h

@@ -20,7 +20,7 @@ extern char**     pwd_cache;
 extern int        pwd_cache_count;
 
 extern char* crypt_getpwdfilename(void);
-extern char* crypt_getpwdreloadfilename();
+extern char* crypt_getpwdreloadfilename(void);
 extern MsgType crypt_salt(const char* user);
 extern int crypt_verify(Port* port, const char* user, const char* pgpass);