support ppc853x by patch

Author: hgy59

cross/mosquitto/Makefile

@@ -7,9 +7,6 @@ PKG_DIR = $(PKG_NAME)-$(PKG_VERS)
 
 DEPENDS = cross/c-ares cross/openssl cross/util-linux cross/libwebsockets
 
-# since version 1.6.11 at least glibc 2.12 is required
-# https://github.com/eclipse/mosquitto/issues/1792
-UNSUPPORTED_ARCHS = powerpc ppc824x ppc853x ppc854x
 
 HOMEPAGE = http://www.mosquitto.org/
 COMMENT  = Mosquitto is an open source message broker that implements the MQTT protocol versions 5.0, 3.1.1 and 3.1.

cross/mosquitto/patches/ppc853x/002-remove-use_of_unsupported-pthread-functions.patch

@@ -0,0 +1,20 @@
+# since mosquitto 1.6.11 pthread_setname_np is required, but not supported with glibc < 2.12
+# this is for naming threads only as introduced with https://github.com/eclipse/mosquitto/commit/bd27935ff63613301e485c0ce9e7e9b4e67e6d07
+# and has no effect to the theading support in mosquitto.
+
+--- lib/thread_mosq.c.org	2020-08-19 13:55:03.000000000 +0000
++++ lib/thread_mosq.c	2020-09-29 07:13:18.196407777 +0000
+@@ -41,13 +41,6 @@
+ 
+ 	mosq->threaded = mosq_ts_self;
+ 	if(!pthread_create(&mosq->thread_id, NULL, mosquitto__thread_main, mosq)){
+-#if defined(__linux__)
+-		pthread_setname_np(mosq->thread_id, "mosquitto loop");
+-#elif defined(__NetBSD__)
+-		pthread_setname_np(mosq->thread_id, "%s", "mosquitto loop");
+-#elif defined(__FreeBSD__) || defined(__OpenBSD__)
+-		pthread_set_name_np(mosq->thread_id, "mosquitto loop");
+-#endif
+ 		return MOSQ_ERR_SUCCESS;
+ 	}else{
+ 		return MOSQ_ERR_ERRNO;