From: Jonathan McDowell <noodles@earth.li>
Date: Wed, 23 Sep 2020 08:14:38 +0000 (+0100)
Subject: Fix option parsing on some platforms (e.g. ARM)
X-Git-Url: https://the.earth.li/gitweb/?p=mqtt-arp.git;a=commitdiff_plain;h=21137fd11bb52ff1a24987c4f51946b85f6eb0af

Fix option parsing on some platforms (e.g. ARM)

getopt_long returns an int, not a char, and on some platforms we hit
issues with the sign extension as a result. Do it properly.

Fixes #2
---

diff --git a/mqtt-arp.c b/mqtt-arp.c
index 2836366..bc65fbb 100644
--- a/mqtt-arp.c
+++ b/mqtt-arp.c
@@ -361,7 +361,7 @@ int main(int argc, char *argv[])
 	struct ma_config config;
 	int option_index = 0;
 	int macs = 0;
-	char c;
+	int c;
 
 	bzero(&config, sizeof(config));
 	config.mqtt_port = MQTT_PORT;