From 132faaf178d99315efd9034f9c6670a635736f3b Mon Sep 17 00:00:00 2001
From: jlinenkohl <jlinenkohl@gmail.com>
Date: Sun, 3 May 2026 11:11:07 -0400
Subject: [PATCH] guest: fix freestanding GCC malloc/free declarations

---
 guest/src/crc32c.cpp | 3 +++
 guest/src/guest.cpp  | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/guest/src/crc32c.cpp b/guest/src/crc32c.cpp
index 2515f498..edf02582 100644
--- a/guest/src/crc32c.cpp
+++ b/guest/src/crc32c.cpp
@@ -1,5 +1,8 @@
 #include "api.hpp"
 
+#include <stdlib.h>
+extern "C" void* malloc(size_t);
+extern "C" void free(void*);
 #include <immintrin.h>
 
 inline bool ____is__aligned(const void* buffer, const int align) noexcept {
diff --git a/guest/src/guest.cpp b/guest/src/guest.cpp
index a6331fb7..11316988 100644
--- a/guest/src/guest.cpp
+++ b/guest/src/guest.cpp
@@ -32,6 +32,9 @@ struct Data {
 	size_t len;
 };
 
+#include <stdlib.h>
+extern "C" void* malloc(size_t);
+extern "C" void free(void*);
 #include <immintrin.h>
 PUBLIC(uint32_t empty(const Data& data))
 {