CI: test ARM Cortex targets

.travis.yml

@@ -3,6 +3,18 @@ sudo: false
 
 matrix:
   include:
+    - env: TARGET=thumbv6m-none-eabi
+      os: linux
+      dist: trusty
+      sudo: required
+    - env: TARGET=thumbv7m-none-eabi
+      os: linux
+      dist: trusty
+      sudo: required
+    - env: TARGET=thumbv7em-none-eabi
+      os: linux
+      dist: trusty
+      sudo: required
     - env: TARGET=i586-unknown-linux-gnu
       os: linux
       services: docker
@@ -84,6 +96,16 @@ matrix:
       os: osx
     - env: TARGET=x86_64-unknown-linux-gnu
       os: linux
+  allow_failures:
+     # Issue #2. Flaky test
+    - env: TARGET=arm-unknown-linux-gnueabi
+      os: linux
+     # Issue #2. Flaky test
+    - env: TARGET=arm-unknown-linux-gnueabihf
+      os: linux
+     # Issue #2. Flaky test
+    - env: TARGET=armv7-unknown-linux-gnueabihf
+      os: linux
 
 before_install:
   - export PATH="$PATH:$HOME/.cargo/bin"

ci/env.sh

@@ -25,8 +25,6 @@ case $TARGET in
         export QEMU_LD_PREFIX=/usr/arm-linux-gnueabihf
         ;;
     armv7-unknown-linux-gnueabihf)
-        # See #2
-        export DONT_RUN_TESTS=y
         export PREFIX=arm-linux-gnueabihf-
         export QEMU_LD_PREFIX=/usr/arm-linux-gnueabihf
         ;;
@@ -65,13 +63,19 @@ case $TARGET in
         export QEMU_LD_PREFIX=/usr/powerpc64-linux-gnu
         ;;
     powerpc64le-unknown-linux-gnu)
-        # See #2
-        export DONT_RUN_TESTS=y
         if [[ -z $DOCKER ]]; then
             export DOCKER=y
         fi
         export PREFIX=powerpc64le-linux-gnu-
         export QEMU=qemu-ppc64le
         export QEMU_LD_PREFIX=/usr/powerpc64le-linux-gnu
+        # Issue #2. QEMU doesn't work
+        export RUN_TESTS=n
+        ;;
+    thumbv*-none-eabi)
+        export CARGO=xargo
+        export PREFIX=arm-none-eabi-
+        # Bare metal targets. No `std` or `test` crates for these targets.
+        export RUN_TESTS=n
         ;;
 esac

ci/install.sh

@@ -32,7 +32,12 @@ install_binutils() {
         osx)
             brew install binutils
             ;;
-        *)
+    esac
+
+    case $TARGET in
+        thumbv*-none-eabi)
+            sudo apt-get install -y --no-install-recommends \
+                 gcc-arm-none-eabi
             ;;
     esac
 }
@@ -74,11 +79,20 @@ install_rust() {
 }
 
 add_rustup_target() {
-    if [[ $TARGET != $HOST ]]; then
+    if [[ $TARGET != $HOST && ${CARGO:-cargo} == "cargo" ]]; then
         rustup target add $TARGET
     fi
 }
 
+install_xargo() {
+    if [[ $CARGO == "xargo" ]]; then
+        sudo apt-get install -y --no-install-recommends \
+             libssh2-1
+        curl -sf "https://raw.githubusercontent.com/japaric/rust-everywhere/master/install.sh" | \
+            bash -s -- --from japaric/xargo --at $HOME/.cargo/bin
+    fi
+}
+
 configure_cargo() {
     if [[ $PREFIX ]]; then
         ${PREFIX}gcc -v
@@ -99,6 +113,7 @@ main() {
         install_c_toolchain
         install_rust
         add_rustup_target
+        install_xargo
         configure_cargo
     fi
 }

ci/script.sh

@@ -3,8 +3,8 @@ set -ex
 . $(dirname $0)/env.sh
 
 build() {
-    cargo build --target $TARGET
-    cargo build --target $TARGET --release
+    ${CARGO:-cargo} build --target $TARGET
+    ${CARGO:-cargo} build --target $TARGET --release
 }
 
 run_tests() {
@@ -14,14 +14,14 @@ run_tests() {
 
     if [[ $QEMU ]]; then
         cargo test --target $TARGET --no-run
-        if [[ -z $DONT_RUN_TESTS ]]; then
+        if [[ ${RUN_TESTS:-y} == "y" ]]; then
            $QEMU target/**/debug/rustc_builtins-*
         fi
         cargo test --target $TARGET --release --no-run
-        if [[ -z $DONT_RUN_TESTS ]]; then
+        if [[ ${RUN_TESTS:-y} == "y" ]]; then
             $QEMU target/**/release/rustc_builtins-*
         fi
-    elif [[ -z $DONT_RUN_TESTS ]]; then
+    elif [[ ${RUN_TESTS:-y} == "y" ]]; then
         cargo test --target $TARGET
         cargo test --target $TARGET --release
     fi
@@ -50,8 +50,8 @@ main() {
                       bash ci/script.sh'
     else
         build
-        run_tests
         inspect
+        run_tests
     fi
 }
 

thumbv6m-none-eabi.json

@@ -0,0 +1,10 @@
+{
+    "arch": "arm",
+    "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
+    "features": "+strict-align",
+    "llvm-target": "thumbv6m-none-eabi",
+    "max-atomic-width": 0,
+    "os": "none",
+    "target-endian": "little",
+    "target-pointer-width": "32"
+}

thumbv7em-none-eabi.json

@@ -0,0 +1,8 @@
+{
+    "arch": "arm",
+    "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
+    "llvm-target": "thumbv7em-none-eabi",
+    "os": "none",
+    "target-endian": "little",
+    "target-pointer-width": "32"
+}

thumbv7m-none-eabi.json

@@ -0,0 +1,8 @@
+{
+    "arch": "arm",
+    "data-layout": "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64",
+    "llvm-target": "thumbv7m-none-eabi",
+    "os": "none",
+    "target-endian": "little",
+    "target-pointer-width": "32"
+}