From 121a9ff9f6fc69066ce30c2dbe6cbfbfdca6aeaa Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Fri, 23 Dec 2022 18:51:08 +0100
Subject: [PATCH] Fix alternate stack test in configure

* configure.ac (emacs_cv_alternate_stack): Include <stdlib.h>
for 'malloc's prototype.
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index ac29f351fb3..df19508d3d3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5248,6 +5248,7 @@ AC_CACHE_CHECK([whether signals can be handled on alternate stack],
 	       [emacs_cv_alternate_stack],
   [AC_COMPILE_IFELSE(
      [AC_LANG_PROGRAM([[#include <signal.h>
+			#include <stdlib.h>
 		      ]],
 		      [[stack_t ss;
 			struct sigaction sa;
-- 
2.39.2