From 403935b1d85a5ab042dc8d8622b5753a32dc3bd2 Mon Sep 17 00:00:00 2001
From: Samy Sadi <samy.sadi.contact@gmail.com>
Date: Mon, 30 Mar 2026 07:39:43 +0000
Subject: [PATCH] Fix missing <cstdlib> include for Emscripten web builds

Compiling `godot-cpp` for the Web platform (`wasm32`) using Emscripten currently fails in `src/godot.cpp` with the following error:

`error: use of undeclared identifier 'realloc'`

Unlike, for instance, GCC on Linux, Emscripten's Clang compiler strictly requires `<cstdlib>` to be explicitly included to use standard memory allocation functions like `realloc`. This commit adds the missing header alongside `<stdio.h>` to resolve the build failure and ensure cross-platform compatibility.
---
 src/godot.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/godot.cpp b/src/godot.cpp
index c1b27790d..5ffc75838 100644
--- a/src/godot.cpp
+++ b/src/godot.cpp
@@ -41,6 +41,7 @@
 #include <godot_cpp/core/error_macros.hpp>
 
 #include <stdio.h>
+#include <cstdlib>
 
 namespace godot {