1 files changed, 31 insertions, 8 deletions

diff --git a/config.h.in b/config.h.in
index a622aad..0cf0d70 100644
--- a/config.h.in
+++ b/config.h.in
@@ -1,10 +1,33 @@
 #pragma once
 
-#define CLIENT_ID "my-client-id"
-#define HOST "localhost"
-#define PORT 1883
-#define USERNAME "user"
-#define PASSWORD "password"
-#define TOPIC "topic"
-#define KEEPALIVE 10
-#define WAIT_UNTIL_RECONNECT 10
+#ifndef CLIENT_ID
+#       define CLIENT_ID "my-client-id"
+#endif
+
+#ifndef HOST
+#       define HOST "localhost"
+#endif
+
+#ifndef PORT
+#       define PORT 1883
+#endif
+
+#ifndef USERNAME
+#       define USERNAME "user"
+#endif
+
+#ifndef PASSWORD
+#       define PASSWORD "password"
+#endif
+
+#ifndef TOPIC
+#       define TOPIC "topic"
+#endif
+
+#ifndef KEEPALIVE
+#       define KEEPALIVE 10
+#endif
+
+#ifndef WAIT_UNTIL_RECONNECT
+#       define WAIT_UNTIL_RECONNECT 10
+#endif