Add support to the arm-unknown-linux-gnueabihf platform

.travis.yml

@@ -15,30 +15,23 @@ matrix:
     - os: osx
       rust: stable
       env: TARGET=x86_64-apple-darwin
+    - os: linux
+      rust: stable
+      env:
+        - TARGET=arm-unknown-linux-gnueabihf
+        - CARGO_TARGET_ARM_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc-4.8
 
     # Beta channel.
+    # The other platforms are disabled in order to reduce the total CI time
     - os: linux
       rust: beta
       env: TARGET=x86_64-unknown-linux-gnu
-    # Disabled to reduce total CI time
-    # - os: linux
-    #   rust: beta
-    #   env: TARGET=i686-unknown-linux-gnu
-    # - os: osx
-    #   rust: beta
-    #   env: TARGET=x86_64-apple-darwin
 
     # Nightly channel.
+    # The other platforms are disabled in order to reduce the total CI time
     - os: linux
       rust: nightly
       env: TARGET=x86_64-unknown-linux-gnu
-    # Disabled to reduce total CI time
-    # - os: linux
-    #   rust: nightly
-    #   env: TARGET=i686-unknown-linux-gnu
-    # - os: osx
-    #   rust: nightly
-    #   env: TARGET=x86_64-apple-darwin
 
     # Minimum Rust supported channel.
     - os: linux
@@ -50,6 +43,11 @@ matrix:
     - os: osx
       rust: 1.30.1
       env: TARGET=x86_64-apple-darwin
+    - os: linux
+      rust: 1.30.1
+      env:
+        - TARGET=arm-unknown-linux-gnueabihf
+        - CARGO_TARGET_ARM_UNKNOWN_LINUX_GNUEABIHF_LINKER=arm-linux-gnueabihf-gcc-4.8
 
     # Code formatting check
     - os: linux
@@ -60,13 +58,6 @@ matrix:
       script:
         - cargo clippy --all-features -- -D clippy::pedantic
 
-addons:
-  apt:
-    packages:
-      # needed for i686-unknown-linux-gnu target
-      - gcc-multilib
-      - fakeroot
-
 env:
   global:
     # Default target on travis-ci.
@@ -80,13 +71,13 @@ install:
   - if [[ $TRAVIS_OS_NAME = linux && $HOST != $TARGET ]]; then rustup target add $TARGET; fi
 
 script:
-  # Incorporate TARGET env var to the build and test process
-  - cargo build --target $TARGET --verbose
-  - cargo test --target $TARGET --verbose
+  - bash ci/script.bash
 
+before_install:
+  - bash ci/before_install.bash
 
 before_deploy:
-  - bash deploy/before_deploy.bash
+  - bash ci/before_deploy.bash
 
 deploy:
   provider: releases

ci/before_install.bash

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -ex
+
+if [ "$TRAVIS_OS_NAME" != linux ]; then
+    exit 0
+fi
+
+sudo apt-get update
+
+# needed to build deb packages
+sudo apt-get install -y fakeroot
+
+# needed for i686 linux gnu target
+if [[ $TARGET == i686-unknown-linux-gnu ]]; then
+    sudo apt-get install -y gcc-multilib
+fi
+
+# needed for cross-compiling for arm
+if [[ $TARGET == arm-unknown-linux-* ]]; then
+    sudo apt-get install -y \
+        gcc-4.8-arm-linux-gnueabihf \
+        binutils-arm-linux-gnueabihf \
+        libc6-armhf-cross \
+        libc6-dev-armhf-cross
+fi

ci/script.bash

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -ex
+
+# Incorporate TARGET env var to the build and test process
+cargo build --target "$TARGET" --verbose
+
+# We cannot run arm executables on linux
+if [[ $TARGET != arm-unknown-linux-* ]]; then
+    cargo test --target "$TARGET" --verbose
+fi