fix compiler warnings

src/librc/librc-misc.c

@@ -277,7 +277,6 @@ static RC_STRINGLIST *rc_config_kcl(RC_STRINGLIST *config)
 	char *tmp = NULL;
 	char *value = NULL;
 	size_t varlen = 0;
-	size_t len = 0;
 
 	overrides = rc_stringlist_new();
 
@@ -295,7 +294,6 @@ static RC_STRINGLIST *rc_config_kcl(RC_STRINGLIST *config)
 		}
 
 		if (value != NULL) {
-			len = varlen + strlen(value) + 2;
 			xasprintf(&tmp, "%s=%s", override->value, value);
 		}
 

src/rc/broadcast.c

@@ -133,7 +133,7 @@ void broadcast(char *text)
 	char *p;
 	char *line = NULL;
 	struct sigaction sa;
-	int fd;
+	volatile int fd;
 	FILE *tp;
 	int	flags;
 	char *term = NULL;

src/rc/openrc-shutdown.c

@@ -160,9 +160,7 @@ static void sleep_no_interrupt(int seconds)
 
 static void stop_shutdown(int sig)
 {
-	/* use the sig parameter so the compiler will not complain */
-	if (sig == SIGINT)
-		;
+	(void) sig;
 	unlink(nologin_file);
 	unlink(shutdown_pid);
 einfo("Shutdown canceled");

src/rc/supervise-daemon.c

@@ -267,7 +267,7 @@ static char *make_cmdline(char **argv)
 	return cmdline;
 }
 
-static pid_t exec_command(char *cmd)
+static pid_t exec_command(const char *cmd)
 {
 	char *file;
 	pid_t pid = -1;
@@ -510,7 +510,6 @@ static void supervisor(char *exec, char **argv)
 	int healthcheck_respawn;
 	int i;
 	int nkilled;
-	int ready;
 	int sig_send;
 	pid_t health_pid;
 	pid_t wait_pid;