From 5865f95da8ffa1d65dbe17c1fc08bf4dd2025393 Mon Sep 17 00:00:00 2001
From: Alexandre Oliva <oliva@adacore.com>
Date: Mon, 12 May 2025 23:23:14 -0300
Subject: [PATCH] ada: use __builtin_alloca for alloca on vxworks

Several adaint.c functions call alloca, but vxworks doesn't declare
it.  Use the GCC builtin.

gcc/ada/ChangeLog:

	* adaint.c [__vxworks] (alloca): Redirect to builtin.
---
 gcc/ada/adaint.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gcc/ada/adaint.c b/gcc/ada/adaint.c
index 2f5bbf31f79..adc39517280 100644
--- a/gcc/ada/adaint.c
+++ b/gcc/ada/adaint.c
@@ -63,6 +63,10 @@
 #include <sys/time.h>
 #include <ctype.h> /* for isalpha */
 
+#ifndef alloca
+#define alloca(n) __builtin_alloca(n)
+#endif
+
 #if defined (__mips_vxworks)
 #include "cacheLib.h"
 #endif /* __mips_vxworks */
-- 
2.47.2