From dde005ef92190dffd1bab0ddbfcfd8c5dbe17bc8 Mon Sep 17 00:00:00 2001
From: "Roger A. Light" <roger@atchoo.org>
Date: Thu, 16 Aug 2018 11:06:58 +0100
Subject: [PATCH] Return error in mosquitto_pub -l if compiled without
 threading.

---
 client/pub_client.c | 8 ++++++++
 config.mk           | 1 +
 2 files changed, 9 insertions(+)

diff --git a/client/pub_client.c b/client/pub_client.c
index 85fd73c8..31bcf23a 100644
--- a/client/pub_client.c
+++ b/client/pub_client.c
@@ -336,6 +336,14 @@ int main(int argc, char *argv[])
 	password = cfg.password;
 	quiet = cfg.quiet;
 
+#ifndef WITH_THREADING
+	if(cfg.pub_mode == MSGMODE_STDIN_LINE){
+		fprintf(stderr, "Error: '-l' mode not available, threading support has not been compiled in.\n");
+		free(buf);
+		return 1;
+	}
+#endif
+
 	if(cfg.pub_mode == MSGMODE_STDIN_FILE){
 		if(load_stdin()){
 			fprintf(stderr, "Error loading input from stdin.\n");
diff --git a/config.mk b/config.mk
index 01efb996..a8d4914a 100644
--- a/config.mk
+++ b/config.mk
@@ -194,6 +194,7 @@ endif
 ifeq ($(WITH_THREADING),yes)
 	LIB_LIBS:=$(LIB_LIBS) -lpthread
 	LIB_CFLAGS:=$(LIB_CFLAGS) -DWITH_THREADING
+	CLIENT_CFLAGS:=$(CLIENT_CFLAGS) -DWITH_THREADING
 endif
 
 ifeq ($(WITH_SOCKS),yes)