add aarch64 test build

.travis.yml

@@ -12,6 +12,8 @@ matrix:
       env: TARGET=i686-unknown-linux-gnu
     - os: osx
       env: TARGET=x86_64-apple-darwin NO_ADD=1
+    - os: osx
+      env: TARGET=aarch64-apple-ios NO_RUN=--no-run TARGET_SYSROOT=$(xcrun -sdk iphoneos --show-sdk-path)
     - rust: beta
       env: TARGET=x86_64-unknown-linux-gnu NO_ADD=1
     - rust: nightly
@@ -35,11 +37,11 @@ install:
 
 script:
   - cargo build --verbose
-  - cargo test --verbose
-  - cargo test --verbose --features parallel
-  - cargo test --manifest-path cc-test/Cargo.toml --target $TARGET
-  - cargo test --manifest-path cc-test/Cargo.toml --target $TARGET --features parallel
-  - cargo test --manifest-path cc-test/Cargo.toml --target $TARGET --release
+  - cargo test --verbose $NO_RUN
+  - cargo test --verbose --features parallel $NO_RUN
+  - cargo test --manifest-path cc-test/Cargo.toml --target $TARGET $NO_RUN
+  - cargo test --manifest-path cc-test/Cargo.toml --target $TARGET --features parallel $NO_RUN
+  - cargo test --manifest-path cc-test/Cargo.toml --target $TARGET --release $NO_RUN
   - cargo doc
   - cargo clean && cargo build
   - rustdoc --test README.md -L target/debug -L target/debug/deps

cc-test/src/aarch64.S

@@ -0,0 +1,10 @@
+.globl asm
+asm:
+    mov w0, 7
+    ret
+
+.globl _asm
+_asm:
+    mov w0, 7
+    ret
+