travis: add mqtt job on Linux

diff --git a/.travis.yml b/.travis.yml
index f45565fe64832ec75848a9d637bd0535189efd75..415e1510304761a12960a0148e12919c5e7e75a0 100644 (file)
--- a/.travis.yml
+++ b/.travis.yml
@@ -85,6 +85,11 @@ matrix:
           env:
               - T=normal C="--enable-ares"
               - OVERRIDE_CC="CC=gcc-8" OVERRIDE_CXX="CXX=g++-8"
+        - os: linux
+          compiler: gcc
+          dist: trusty
+          env:
+              - T=normal C="--enable-mqtt"
         - os: linux
           compiler: gcc
           dist: bionic