From aa7bfb48194dbac2658c65c09ca0b76480e7dd15 Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Fri, 3 Dec 2021 09:22:19 +0300
Subject: [PATCH] engine: check for non-standard alloca header

---
 engine/common/common.c | 3 +++
 wscript                | 6 ++++++
 2 files changed, 9 insertions(+)

diff --git a/engine/common/common.c b/engine/common/common.c
index 06634937..c8baf28b 100644
--- a/engine/common/common.c
+++ b/engine/common/common.c
@@ -13,6 +13,9 @@ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
 */
 
+#if defined( ALLOCA_H )
+#include ALLOCA_H
+#endif
 #include "common.h"
 #include "studio.h"
 #include "xash3d_mathlib.h"
diff --git a/wscript b/wscript
index 7836ebf5..c283d47a 100644
--- a/wscript
+++ b/wscript
@@ -290,6 +290,12 @@ def configure(conf):
 	else:
 		conf.undefine('HAVE_TGMATH_H')
 
+	# check if we can use alloca.h or malloc.h
+	if conf.check_cc(header_name='alloca.h', mandatory=False):
+		conf.define('ALLOCA_H', 'alloca.h')
+	elif conf.check_cc(header_name='malloc.h', mandatory=False):
+		conf.define('ALLOCA_H', 'malloc.h')
+
 	# indicate if we are packaging for Linux/BSD
 	if conf.options.PACKAGING:
 		conf.env.LIBDIR = conf.env.BINDIR = '${PREFIX}/lib/xash3d'