Travis: Upgrade travis to xenial (#3666)

Upgrade travis to xenial

.travis.yml

@@ -1,5 +1,5 @@
 language: cpp 
-dist: trusty 
+dist: xenial 
 sudo: required 
 git: 
  depth: 3
@@ -51,19 +51,19 @@ env:
     - PACKAGE='Three Triangulation Triangulation_2 ' 
     - PACKAGE='Triangulation_3 Union_find Visibility_2 ' 
     - PACKAGE='Voronoi_diagram_2 wininst ' 
-compiler: clang-3.6
+compiler: clang
 install: 
   - echo "$PWD"
   - if [ -n "$TRAVIS_PULL_REQUEST" ] && [ "$PACKAGE" != CHECK ]; then  DO_IGNORE=FALSE;  for ARG in $(echo "$PACKAGE");do if [ "$ARG" = "Maintenance" ]; then continue; fi; . $PWD/.travis/test_package.sh "$PWD" "$ARG";  echo "DO_IGNORE is $DO_IGNORE";  if [ "$DO_IGNORE" = "FALSE" ]; then  break; fi; done; if [ "$DO_IGNORE" = "TRUE" ]; then travis_terminate 0; fi;fi
   - bash .travis/install.sh 
-  - export CXX=clang++-3.6 CC=clang-3.6;
+  - export CXX=clang++ CC=clang;
 before_script: 
 - wget -O doxygen_exe https://cgal.geometryfactory.com/~mgimeno/doxygen_exe
 - sudo mv doxygen_exe /usr/bin/doxygen
 - sudo chmod +x /usr/bin/doxygen
 - mkdir -p build 
 - cd build 
-- cmake -DCMAKE_CXX_FLAGS="-std=c++11" -DCGAL_HEADER_ONLY=ON -DQt5_DIR="/opt/qt55/lib/cmake/Qt5" -DQt5Svg_DIR="/opt/qt55/lib/cmake/Qt5Svg" -DQt5OpenGL_DIR="/opt/qt55/lib/cmake/Qt5OpenGL" -DCMAKE_CXX_FLAGS_RELEASE=-DCGAL_NDEBUG -DWITH_examples=ON -DWITH_demos=ON -DWITH_tests=ON .. 
+- cmake -DCMAKE_CXX_FLAGS="-std=c++11" -DCGAL_HEADER_ONLY=ON -DCMAKE_CXX_FLAGS_RELEASE=-DCGAL_NDEBUG -DWITH_examples=ON -DWITH_demos=ON -DWITH_tests=ON .. 
 - make 
 - sudo make install &>/dev/null
 - cd ..

.travis/build_package.sh

@@ -45,7 +45,7 @@ function build_demo {
     QGLVIEWERROOT=$PWD/qglviewer
     export QGLVIEWERROOT
   fi
-  cmake -DCGAL_DIR="/usr/local/lib/cmake/CGAL" -DQt5_DIR="/opt/qt55/lib/cmake/Qt5" -DQt5Svg_DIR="/opt/qt55/lib/cmake/Qt5Svg" -DQt5OpenGL_DIR="/opt/qt55/lib/cmake/Qt5OpenGL" -DCGAL_DONT_OVERRIDE_CMAKE_FLAGS:BOOL=ON -DCMAKE_CXX_FLAGS="${CXX_FLAGS} ${EXTRA_CXX_FLAGS}" ..
+  cmake -DCGAL_DIR="/usr/local/lib/cmake/CGAL" -DCGAL_DONT_OVERRIDE_CMAKE_FLAGS:BOOL=ON -DCMAKE_CXX_FLAGS="${CXX_FLAGS} ${EXTRA_CXX_FLAGS}" ..
   make -j2
 }
 old_IFS=$IFS

.travis/generate_travis.sh

@@ -60,7 +60,7 @@ done
 COPY=0
 for LINE in $(cat "$PWD/.travis/template.txt")
 do
-	if [ "$LINE" = "compiler: clang-3.6" ]
+	if [ "$LINE" = "compiler: clang" ]
 	then
 		COPY=1
 	fi

.travis/install.sh

@@ -2,23 +2,13 @@
 
 [ -n "$CGAL_DEBUG_TRAVIS" ] && set -x
 DONE=0
+sudo apt-get update
 while [ $DONE = 0 ]
 do
-  DONE=1 && sudo -E apt-add-repository -y "ppa:ppsspp/cmake" ||  DONE=0 && sleep 5
-done
-DONE=0
-while [ $DONE = 0 ]
-do
-  DONE=1 && sudo -E apt-add-repository -y "ppa:hedges/qt5.5" ||  DONE=0 && sleep 5
-done
-
-DONE=0
-while [ $DONE = 0 ]
-do
-  DONE=1 && sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install clang-3.6 zsh \
-flex bison cmake graphviz libgmp-dev libmpfr-dev libmpfi-dev zlib1g-dev libeigen3-dev  libboost1.55-dev \
-libboost-system1.55-dev libboost-program-options1.55-dev libboost-thread1.55-dev libboost-iostreams1.55-dev \
-qt55base qt55script qt55svg qt55tools qt55graphicaleffects libopencv-dev mesa-common-dev libmetis-dev libglu1-mesa-dev \
+  DONE=1 && sudo -E apt-get -yq --no-install-suggests --no-install-recommends --force-yes install clang zsh \
+flex bison cmake graphviz libgmp-dev libmpfr-dev libmpfi-dev zlib1g-dev libeigen3-dev  libboost-dev \
+libboost-system-dev libboost-program-options-dev libboost-thread-dev libboost-iostreams-dev \
+qtbase5-dev libqt5opengl5-dev qtscript5-dev libqt5svg5-dev qttools5-dev qttools5-dev-tools qml-module-qtgraphicaleffects libopencv-dev mesa-common-dev libmetis-dev libglu1-mesa-dev \
 || DONE=0 && sudo apt-get update
 done
 exit 0

.travis/template.txt

@@ -1,5 +1,5 @@
 language: cpp 
-dist: trusty 
+dist: xenial 
 sudo: required 
 git: 
  depth: 3
@@ -7,19 +7,19 @@ env:
  matrix:
   PACKAGES_MATRIX
 
-compiler: clang-3.6
+compiler: clang
 install: 
   - echo "$PWD"
   - if [ -n "$TRAVIS_PULL_REQUEST" ] && [ "$PACKAGE" != CHECK ]; then  DO_IGNORE=FALSE;  for ARG in $(echo "$PACKAGE");do if [ "$ARG" = "Maintenance" ]; then continue; fi; . $PWD/.travis/test_package.sh "$PWD" "$ARG";  echo "DO_IGNORE is $DO_IGNORE";  if [ "$DO_IGNORE" = "FALSE" ]; then  break; fi; done; if [ "$DO_IGNORE" = "TRUE" ]; then travis_terminate 0; fi;fi
   - bash .travis/install.sh 
-  - export CXX=clang++-3.6 CC=clang-3.6;
+  - export CXX=clang++ CC=clang;
 before_script: 
 - wget -O doxygen_exe https://cgal.geometryfactory.com/~mgimeno/doxygen_exe
 - sudo mv doxygen_exe /usr/bin/doxygen
 - sudo chmod +x /usr/bin/doxygen
 - mkdir -p build 
 - cd build 
-- cmake -DCMAKE_CXX_FLAGS="-std=c++11" -DCGAL_HEADER_ONLY=ON -DQt5_DIR="/opt/qt55/lib/cmake/Qt5" -DQt5Svg_DIR="/opt/qt55/lib/cmake/Qt5Svg" -DQt5OpenGL_DIR="/opt/qt55/lib/cmake/Qt5OpenGL" -DCMAKE_CXX_FLAGS_RELEASE=-DCGAL_NDEBUG -DWITH_examples=ON -DWITH_demos=ON -DWITH_tests=ON .. 
+- cmake -DCMAKE_CXX_FLAGS="-std=c++11" -DCGAL_HEADER_ONLY=ON -DCMAKE_CXX_FLAGS_RELEASE=-DCGAL_NDEBUG -DWITH_examples=ON -DWITH_demos=ON -DWITH_tests=ON .. 
 - make 
 - sudo make install &>/dev/null
 - cd ..