From 8b960d39b3ee28a5eddce4063255ccc86e544ae6 Mon Sep 17 00:00:00 2001
From: Michiel van Leeuwen <michiel@embeddedacoustics.com>
Date: Fri, 30 Jan 2026 15:41:41 +0100
Subject: [PATCH] Do not redefine alloca if it already exists

MinGW might already define alloca.
---
 src/serial.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/serial.cc b/src/serial.cc
index 38bc7f3..ded7dfe 100755
--- a/src/serial.cc
+++ b/src/serial.cc
@@ -5,7 +5,7 @@
 # include <alloca.h>
 #endif
 
-#if defined (__MINGW32__)
+#if defined (__MINGW32__) && !defined(alloca)
 # define alloca __builtin_alloca
 #endif