From 236d1775509404b0dcf44873422dd8652b1e9588 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Claes=20N=C3=A4st=C3=A9n?= <pekdon@gmail.com>
Date: Fri, 14 May 2021 13:57:10 +0000
Subject: [PATCH] os: include unistd.h when HAVE_PSTACK is defined

On Solaris when HAVE_PSTACK is defined unistd.h needs to be included to
avoid implicit declarations of pipe, read, execle etc.
---
 os/backtrace.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/os/backtrace.c b/os/backtrace.c
index fd3d6ab0d..99d776950 100644
--- a/os/backtrace.c
+++ b/os/backtrace.c
@@ -227,6 +227,8 @@ xorg_backtrace_frame(uintptr_t pc, int signo, void *arg)
 #endif                          /* HAVE_WALKCONTEXT */
 
 #ifdef HAVE_PSTACK
+#include <unistd.h>
+
 static int
 xorg_backtrace_pstack(void)
 {