Enabled build target aarch64-unknown-linux-gnu for arm64 architecture

.travis.yml

@@ -23,7 +23,13 @@ matrix:
         - TARGET=arm-unknown-linux-gnueabihf
         - CC_arm_unknown_linux_gnueabihf=/usr/bin/arm-linux-gnueabihf-gcc-4.8
         - CARGO_TARGET_ARM_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc-4.8
-
+    - os: linux
+      rust: stable
+      env:
+        - TARGET=aarch64-unknown-linux-gnu
+        - CC_aarch64-unknown-linux-gnu=/usr/bin/aarch64-linux-gnu-gcc-4.8
+        - CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc-4.8
+        
     # Minimum Rust supported channel.
     - os: linux
       rust: 1.26.0

Cargo.toml

@@ -19,6 +19,7 @@ ansi_term = "0.11"
 console = "0.6"
 directories = "1.0"
 lazy_static = "1.0"
+libz-sys = "1.0.20"
 
 [dependencies.git2]
 version = "0.7"

ci/before_install.bash

@@ -27,3 +27,11 @@ if [[ $TARGET == arm-unknown-linux-gnueabihf ]]; then
         libc6-armhf-cross \
         libc6-dev-armhf-cross
 fi
+
+# needed for cross-compiling for arm64
+if [[ $TARGET == aarch64-unknown-linux-gnu ]]; then
+    sudo apt-get install -y \
+        gcc-4.8-aarch64-linux-gnu \
+        binutils-aarch64-linux-gnu \
+        gcc-aarch64-linux-gnu
+fi

ci/script.bash

@@ -6,7 +6,7 @@ set -ex
 cargo build --target "$TARGET" --verbose
 
 # We cannot run arm executables on linux
-if [[ $TARGET != arm-unknown-linux-gnueabihf ]]; then
+if [[ $TARGET != arm-unknown-linux-gnueabihf ]] && [[ $TARGET != aarch64-unknown-linux-gnu ]]; then
     cargo test --target "$TARGET" --verbose
 
     # Run 'bat' on its own source code and the README