From 5af86c5eb0d5e9ca684cb129f52b4e630744ff08 Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.funk1@gmail.com>
Date: Sun, 28 Sep 2025 15:03:06 -0700
Subject: [PATCH] manual: Fix missing include in sigusr example.
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Previously this file would fail to compile with the following error:

    $ gcc manual/examples/sigusr.c
    manual/examples/sigusr.c: In function ‘child_function’:
    manual/examples/sigusr.c:46:3: error: implicit declaration of function ‘exit’ [-Wimplicit-function-declaration]
       46 |   exit (0);
          |   ^~~~
    manual/examples/sigusr.c:23:1: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’
       22 | #include <unistd.h>
      +++ |+#include <stdlib.h>
       23 | /*@end group*/
    manual/examples/sigusr.c:46:3: warning: incompatible implicit declaration of built-in function ‘exit’ [-Wbuiltin-declaration-mismatch]
       46 |   exit (0);
          |   ^~~~
    manual/examples/sigusr.c:46:3: note: include ‘<stdlib.h>’ or provide a declaration of ‘exit’

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
---
 manual/examples/sigusr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/manual/examples/sigusr.c b/manual/examples/sigusr.c
index 13874fd7d8..8f00cd9407 100644
--- a/manual/examples/sigusr.c
+++ b/manual/examples/sigusr.c
@@ -18,6 +18,7 @@
 /*@group*/
 #include <signal.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include <sys/types.h>
 #include <unistd.h>
 /*@end group*/
-- 
2.47.3