From a30d62dfb9ea30af58ef331fae1e6f727d0558c0 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Tue, 4 May 2021 10:32:08 -0700
Subject: [PATCH] examples/ucontext-cp.c: Do not use SIGSTKSZ

glibc 2.34 has removed SIGSTKSZ therefore we replace it

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 examples/ucontext-cp.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

--- a/examples/ucontext-cp.c
+++ b/examples/ucontext-cp.c
@@ -3,6 +3,7 @@
  * gcc -Wall -O2 -D_GNU_SOURCE -o ucontext-cp ucontext-cp.c -luring
  */
 #define _POSIX_C_SOURCE 199309L
+#include <stddef.h>
 #include <stdio.h>
 #include <fcntl.h>
 #include <string.h>
@@ -22,13 +23,9 @@
 #define QD	64
 #define BS	1024
 
-#ifndef SIGSTKSZ
-#define SIGSTKSZ 8192
-#endif
-
 typedef struct {
 	struct io_uring *ring;
-	unsigned char stack_buf[SIGSTKSZ];
+	max_align_t stack_buf[(8 * 1024 + sizeof (max_align_t) - 1) / sizeof (max_align_t)];
 	ucontext_t ctx_main, ctx_fnew;
 } async_context;