From f67a3703118be7d97629130d99630996ff3cb255 Mon Sep 17 00:00:00 2001
From: SiZiOUS <sizious@gmail.com>
Date: Sat, 19 Jul 2025 18:45:42 +0200
Subject: [PATCH] embed/port: Fix alloca include for Windows platforms.

When building the embedded port on MinGW-w64, I receive the following
error:

    fatal error: alloca.h: No such file or directory

MinGW-w64 (used on MSYS2) doesn't include `alloca.h`, but `alloca()` is
provided via `malloc.h` instead.  And this fix is also needed for other
Windows build systems.

Signed-off-by: SiZiOUS <sizious@gmail.com>
---
 ports/embed/port/mpconfigport_common.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/ports/embed/port/mpconfigport_common.h b/ports/embed/port/mpconfigport_common.h
index 8e19859ed2..aa65640fcd 100644
--- a/ports/embed/port/mpconfigport_common.h
+++ b/ports/embed/port/mpconfigport_common.h
@@ -34,8 +34,13 @@ typedef long mp_off_t;
 
 // Need to provide a declaration/definition of alloca()
 #if defined(__FreeBSD__) || defined(__NetBSD__)
+// BSD
 #include <stdlib.h>
+#elif defined(_WIN32)
+// Windows
+#include <malloc.h>
 #else
+// Other OS
 #include <alloca.h>
 #endif