Merge pull request #41 from aws-samples/zigbuild

chore: switch to zigbuild for cross compilation

Author: nmoutschen

Makefile

@@ -2,6 +2,7 @@ STACK_NAME ?= rust-products
 FUNCTIONS := get-products get-product put-product delete-product dynamodb-streams
 
 ARCH := aarch64-unknown-linux-gnu
+ARCH_SPLIT = $(subst -, ,$(ARCH))
 
 .PHONY: build deploy tests
 
@@ -15,7 +16,10 @@ endif
 ifeq (,$(shell which cargo))
 	$(error "Could not found Cargo, please install it")
 endif
-	cargo install cross
+ifeq (,$(shell which zig))
+	$(error "Could not found Zig compiler, please install it")
+endif
+	cargo install cargo-zigbuild
 ifeq (,$(shell which sam))
 	$(error "Could not found SAM CLI, please install it")
 endif
@@ -24,7 +28,14 @@ ifeq (,$(shell which artillery))
 endif
 
 build:
-	cross build --release --target $(ARCH)
+ifeq ("$(shell zig targets | jq -r .native.cpu.arch)-$(shell zig targets | jq -r .native.os)-$(shell zig targets | jq -r .native.abi)", "$(word 1,$(ARCH_SPLIT))-$(word 3,$(ARCH_SPLIT))-$(word 4,$(ARCH_SPLIT))")
+	@echo "Same host and target. Using native build"
+	cargo build --release --target $(ARCH)
+else
+	@echo "Different host and target. Using zigbuild"
+	cargo zigbuild --release --target $(ARCH)
+endif
+	
 	rm -rf ./build
 	mkdir -p ./build
 	${MAKE} ${MAKEOPTS} $(foreach function,${FUNCTIONS}, build-${function})

README.md

@@ -15,7 +15,8 @@ This single crate will create [five different binaries](./src/bin), one for each
 ### Requirements
 
 * [Rust](https://www.rust-lang.org/) 1.56.0 or higher
-* [Cross](https://github.com/rust-embedded/cross) for cross-compilation to Arm64
+* [cargo-zigbuild](https://github.com/messense/cargo-zigbuild) and [Zig](https://ziglang.org/) for cross-compilation
+* [jq](https://stedolan.github.io/jq/) for tooling specific to this project
 * The [AWS SAM CLI](https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/serverless-sam-cli-install.html) 1.33.0 or higher for deploying to the cloud
 * [Artillery](https://artillery.io/) for load-testing the application