Try to build for arm64, mk. 4

.travis.yml

@@ -25,6 +25,37 @@ matrix:
         - wget -c https://github.com/probonopd/uploadtool/raw/master/upload.sh
         - bash upload.sh linuxdeploy-"$ARCH".AppImage*
 
+    - name: Ubuntu bionic arm64 build
+      env: ARCH=arm64 BUILD_TYPE=arm64-native
+      dist: bionic
+      arch: arm64
+      addons:
+        apt:
+          update: true
+          packages:
+            - libmagic-dev
+            - libjpeg-dev
+            - libpng-dev
+            - cimg-dev
+            - patchelf
+      before_script:
+        - git clone https://github.com/NixOS/patchelf.git && \
+        -  pushd patchelf && \
+        - # cannot use -b since it's not supported in really old versions of git
+        - git checkout 0.8 && \
+        - ./bootstrap.sh && \
+        - ./configure --prefix=/usr && \
+        - make -j $(nproc) && \
+        - make install && \
+        - popd && \
+        - rm -r patchelf/
+
+      script: travis/build.sh
+      after_success:
+        - if [ "$TRAVIS_BRANCH" != "$TRAVIS_TAG" ] && [ "$TRAVIS_BRANCH" != "master" ]; then export TRAVIS_EVENT_TYPE=pull_request; fi
+        - wget -c https://github.com/probonopd/uploadtool/raw/master/upload.sh
+        - bash upload.sh linuxdeploy-"$ARCH".AppImage*
+
     - name: Ubuntu xenial x86_64 coverage build (no binaries uploaded)
       env: ARCH=x86_64 BUILD_TYPE=coverage
       dist: xenial
@@ -60,6 +91,7 @@ matrix:
       script: travis/test-coverage.sh
       after_success: true  # also, we don't intend to upload release binaries
 
+
 branches:
   except:
     - # Do not build tags that we create when we upload to GitHub Releases

travis/build.sh

@@ -30,6 +30,8 @@ if [ "$ARCH" == "x86_64" ]; then
     EXTRA_CMAKE_ARGS=()
 elif [ "$ARCH" == "i386" ]; then
     EXTRA_CMAKE_ARGS=("-DCMAKE_TOOLCHAIN_FILE=$REPO_ROOT/cmake/toolchains/i386-linux-gnu.cmake" "-DUSE_SYSTEM_CIMG=OFF")
+elif [ "$ARCH" == "arm64" ] && [ "$BUILD_TYPE" == "arm64-native" ]; then
+    EXTRA_CMAKE_ARGS=()
 else
     echo "Architecture not supported: $ARCH" 1>&2
     exit 1