fix: switch to cross for cross-compilation

.github/workflows/ci.yml

@@ -17,10 +17,6 @@ jobs:
         os: [ubuntu-latest]
     steps:
       - uses: actions/checkout@v2
-      - name: Install Arm64 toolchain
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y gcc-aarch64-linux-gnu
       - name: Install Rust
         uses: actions-rs/toolchain@v1
         with:
@@ -43,8 +39,14 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-      - name: Build 
-        run: make build
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          use-cross: true
+          command: build
+          args: --target aarch64-unknown-linux-gnu
+      # - name: Build 
+      #   run: make build
       # TODO: separate integration and unit tests
       # - name: Test
       #   run: make tests

Makefile

@@ -1,24 +1,21 @@
 STACK_NAME ?= rust-products
 FUNCTIONS := get-products get-product put-product delete-product
 
-export CC_aarch64_unknown_linux_gnu = aarch64-linux-gnu-gcc
-export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER = aarch64-linux-gnu-gcc
-STRIP := aarch64-linux-gnu-strip
+ARCH := aarch64-unknown-linux-gnu
 
 .PHONY: build deploy tests
 
 all: build deploy tests
 
 build:
-	cargo build --release --target aarch64-unknown-linux-gnu
+	cross build --release --target $(ARCH)
 	rm -rf ./build
 	mkdir -p ./build
 	${MAKE} ${MAKEOPTS} $(foreach function,${FUNCTIONS}, build-${function})
 
 build-%:
 	mkdir -p ./build/$*
-	$(STRIP) ./target/aarch64-unknown-linux-gnu/release/$*
-	cp -v ./target/aarch64-unknown-linux-gnu/release/$* ./build/$*/bootstrap
+	cp -v ./target/$(ARCH)/release/$* ./build/$*/bootstrap
 	cp -v ./otel-config.yaml ./build/$*/collector.yaml
 
 deploy:

README.md

@@ -7,6 +7,7 @@ This is a simple serverless application using Rust as its main programming langu
 ### Requirements
 
 * [Rust](https://www.rust-lang.org/)
+* [Cross](https://github.com/rust-embedded/cross)
 * The [AWS SAM CLI](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html)
 
 ### Usage