The patch is borrowed from upstream https://github.com/ntop/ntopng

https://github.com/ntop/ntopng/commit/5069aa4a6259bd0830a33f2ece980612dba5ace9

commit 5069aa4a6259bd0830a33f2ece980612dba5ace9 (HEAD -> 6.0-stable, origin/6.0-stable)
Author: Denis Pronin <dannftk@yandex.ru>
Date:   Sat Jun 8 09:29:51 2024 +0300

    fix building when rrd_tune() function has const char** as the 2nd param (#8442)
    
    Signed-off-by: Denis Pronin <dannftk@yandex.ru>

diff --git a/src/LuaEngineNtop.cpp b/src/LuaEngineNtop.cpp
index 42e41822c..ea8e3769f 100644
--- a/src/LuaEngineNtop.cpp
+++ b/src/LuaEngineNtop.cpp
@@ -21,6 +21,8 @@
 
 #include "ntop_includes.h"
 
+#include <type_traits>
+
 extern "C" {
 #include "rrd.h"
 };
@@ -6296,7 +6298,7 @@ static int ntop_rrd_tune(lua_State *vm) {
   filename = argv[1];
 
   reset_rrd_state();
-  status = rrd_tune(argc, (char **)argv);
+  status = rrd_tune(argc, (std::conditional<std::is_same<decltype(rrd_tune), int(int, const char **)>::value, const char **, char **>::type)argv);
 
   if (status != 0) {
     char *err = rrd_get_error();