fix(mosq): Support build on older IDF branches

and added build jobs to CI

Author: david-cermak

.github/workflows/mosq__build.yml

@@ -13,7 +13,7 @@ jobs:
     name: Mosquitto build
     strategy:
       matrix:
-        idf_ver: ["latest", "release-v5.3"]
+        idf_ver: ["latest", "release-v5.5", "release-v5.4", "release-v5.3", "release-v5.2", "release-v5.1"]
     runs-on: ubuntu-22.04
     container: espressif/idf:${{ matrix.idf_ver }}
     env:

components/mosquitto/Kconfig

@@ -1,5 +1,13 @@
 menu "Mosquitto"
 
+    config MOSQ_IS_ENABLED
+        # Invisible option that is enabled if MOSQ is added to the IDF components.
+        # This is used to "select" CONFIG_ESP_TLS_SERVER option (needed for TLS connection)
+        # (these are optionally used in mosq)
+        bool
+        default "y"
+        select ESP_TLS_SERVER
+
     config MOSQ_ENABLE_SYS
         bool "Enable $SYS topics"
         default n

components/mosquitto/examples/serverless_mqtt/main/wifi_connect.c

@@ -3,6 +3,8 @@
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
 #include "nvs_flash.h"
 #include "esp_event.h"
 #include "esp_netif.h"