Problem: Travis container with sudo long start

Solution: Move sudo required build to top to start sooner to get better
overall build time.

.travis.yml

@@ -22,15 +22,15 @@ matrix:
     # GCC on Linux
     ##########################################################
 
-    # GCC default, draft disabled, latest libzmq
-    - os: linux
-      env: ZMQ_VERSION=4.2.5
-
-    # GCC default, draft disabled,  older libzmq, libzmq with pkg-config
+    # GCC default, draft disabled,  older libzmq with pkg-config
     - os: linux
       sudo: true
       env: ZMQ_VERSION=4.2.0 BUILD_TYPE=pkgconf
 
+    # GCC default, draft disabled, latest libzmq
+    - os: linux
+      env: ZMQ_VERSION=4.2.5
+
     # GCC 7, draft enabled, latest libzmq
     - os: linux
       addons:

ci_build.sh

@@ -46,7 +46,9 @@ pushd .
 ZeroMQ_DIR=${LIBZMQ} cmake -H. -B${CPPZMQ} ${ZEROMQ_CMAKE_FLAGS}
 cmake --build ${CPPZMQ} -- -j${JOBS}
 if [ "$BUILD_TYPE" = "pkgconf" ] ; then
-    sudo cmake --build ${CPPZMQ} --target install
+    pushd .
+    cd ${CPPZMQ} && sudo make install
+    popd
 fi
 cd ${CPPZMQ}
 ctest -V -j${JOBS}