examples: fix the compilation error caused by CONFIG_DISABLE_SIGNALS

TangMeng12 · extinguish · commit 107b63662eca · 2025-11-21T11:22:32.000+08:00
The commit 'add support for CONFIG_DISABLE_SIGNALS' led to:

undefined reference to `signal'
undefined reference to `sigaction'

Signed-off-by: v-tangmeng &lt;v-tangmeng@xiaomi.com&gt;
diff --git a/examples/buttons/buttons_main.c b/examples/buttons/buttons_main.c
@@ -219,9 +219,11 @@ static int button_daemon(int argc, char *argv[])
       goto errout_with_fd;
     }
 
+#ifndef CONFIG_DISABLE_SIGNALS
   /* Ignore the default signal action */
 
   signal(CONFIG_EXAMPLES_BUTTONS_SIGNO, SIG_IGN);
+#endif
 #endif
 
   /* Now loop forever, waiting BUTTONs events */
diff --git a/examples/chrono/chrono_main.c b/examples/chrono/chrono_main.c
@@ -165,9 +165,11 @@ static int chrono_daemon(int argc, char *argv[])
       goto errout_with_fd;
     }
 
+#ifndef CONFIG_DISABLE_SIGNALS
   /* Ignore the default signal action */
 
   signal(BUTTON_SIGNO, SIG_IGN);
+#endif
 
   /* Now loop forever, waiting BUTTONs events */
 

Original file line number	Diff line number	Diff line change
`@@ -219,9 +219,11 @@ static int button_daemon(int argc, char *argv[])`
`219`	`219`	`goto errout_with_fd;`
`220`	`220`	`}`
`221`	`221`
	`222`	`+#ifndef CONFIG_DISABLE_SIGNALS`
`222`	`223`	`/* Ignore the default signal action */`
`223`	`224`
`224`	`225`	`signal(CONFIG_EXAMPLES_BUTTONS_SIGNO, SIG_IGN);`
	`226`	`+#endif`
`225`	`227`	`#endif`
`226`	`228`
`227`	`229`	`/* Now loop forever, waiting BUTTONs events */`
Original file line number	Diff line number	Diff line change
`@@ -165,9 +165,11 @@ static int chrono_daemon(int argc, char *argv[])`
`165`	`165`	`goto errout_with_fd;`
`166`	`166`	`}`
`167`	`167`
	`168`	`+#ifndef CONFIG_DISABLE_SIGNALS`
`168`	`169`	`/* Ignore the default signal action */`
`169`	`170`
`170`	`171`	`signal(BUTTON_SIGNO, SIG_IGN);`
	`172`	`+#endif`
`171`	`173`
`172`	`174`	`/* Now loop forever, waiting BUTTONs events */`
`173`	`175`