travis.yml: Update Travis to use Bionic and Focal instead of Xenial

According to our support policy, we do not support Xenial anymore.
Time to switch the bigger parts of the builds to Focal instead.
Some few jobs have to be updated to Bionic instead, since they are
currently still failing on Focal otherwise. Also "--disable-pie" is
causing linker problems with newer versions of Ubuntu ... so remove
that switch from the jobs now (we still test it in a gitlab CI job,
so we don't lose much test coverage here).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Tested-by: Cleber Rosa <crosa@redhat.com>
Reviewed-by: Cleber Rosa <crosa@redhat.com>
Message-Id: <20200918103430.297167-6-thuth@redhat.com>
Message-Id: <20200925154027.12672-7-alex.bennee@linaro.org>

.travis.yml

@@ -2,15 +2,15 @@
 # Additional builds with specific requirements for a full VM need to
 # be added as additional matrix: entries later on
 os: linux
-dist: xenial
+dist: focal
 language: c
 compiler:
   - gcc
 cache:
   # There is one cache per branch and compiler version.
   # characteristics of each job are used to identify the cache:
   # - OS name (currently only linux)
-  # - OS distribution (for Linux, xenial, trusty, or precise)
+  # - OS distribution (for Linux, bionic or focal)
   # - Names and values of visible environment variables set in .travis.yml or Settings panel
   timeout: 1200
   ccache: true
@@ -27,7 +27,7 @@ addons:
       - libattr1-dev
       - libbrlapi-dev
       - libcap-ng-dev
-      - libgcc-4.8-dev
+      - libgcc-7-dev
       - libgnutls28-dev
       - libgtk-3-dev
       - libiscsi-dev
@@ -210,8 +210,10 @@ jobs:
 
     # gprof/gcov are GCC features
     - name: "GCC gprof/gcov"
+      dist: bionic
       env:
-        - CONFIG="--enable-gprof --enable-gcov --disable-pie --target-list=${MAIN_SOFTMMU_TARGETS}"
+        - CONFIG="--enable-gprof --enable-gcov --disable-libssh
+                  --target-list=${MAIN_SOFTMMU_TARGETS}"
       after_success:
         - ${SRC_DIR}/scripts/travis/coverage-summary.sh
 
@@ -270,6 +272,7 @@ jobs:
 
     # Using newer GCC with sanitizers
     - name: "GCC9 with sanitizers (softmmu)"
+      dist: bionic
       addons:
         apt:
           update: true
@@ -285,22 +288,21 @@ jobs:
             - libattr1-dev
             - libbrlapi-dev
             - libcap-ng-dev
-            - libgnutls-dev
+            - libgnutls28-dev
             - libgtk-3-dev
             - libiscsi-dev
             - liblttng-ust-dev
             - libnfs-dev
             - libncurses5-dev
             - libnss3-dev
             - libpixman-1-dev
-            - libpng12-dev
+            - libpng-dev
             - librados-dev
             - libsdl2-dev
             - libsdl2-image-dev
             - libseccomp-dev
             - libspice-protocol-dev
             - libspice-server-dev
-            - libssh-dev
             - liburcu-dev
             - libusb-1.0-0-dev
             - libvte-2.91-dev
@@ -310,11 +312,11 @@ jobs:
       compiler: none
       env:
         - COMPILER_NAME=gcc CXX=g++-9 CC=gcc-9
-        - CONFIG="--cc=gcc-9 --cxx=g++-9 --disable-pie --disable-linux-user"
+        - CONFIG="--cc=gcc-9 --cxx=g++-9 --disable-linux-user"
         - TEST_CMD=""
       before_script:
         - mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR}
-        - ${SRC_DIR}/configure ${CONFIG} --extra-cflags="-g3 -O0 -Wno-error=stringop-truncation -fsanitize=thread" --extra-ldflags="-fuse-ld=gold" || { cat config.log && exit 1; }
+        - ${SRC_DIR}/configure ${CONFIG} --extra-cflags="-g3 -O0 -fsanitize=thread" || { cat config.log && exit 1; }
 
 
     # Run check-tcg against linux-user
@@ -356,7 +358,7 @@ jobs:
 
     - name: "[aarch64] GCC check-tcg"
       arch: arm64
-      dist: xenial
+      dist: focal
       addons:
         apt_packages:
           - libaio-dev
@@ -389,7 +391,7 @@ jobs:
 
     - name: "[ppc64] GCC check-tcg"
       arch: ppc64le
-      dist: xenial
+      dist: focal
       addons:
         apt_packages:
           - libaio-dev