fix: add aarch64 cross compilation support

.github/workflows/test.yaml

@@ -1,6 +1,6 @@
 name: 🪲 Test
 
-on: [push, pull_request]
+on: [push]
 
 jobs:
   run-tests:
@@ -11,3 +11,21 @@ jobs:
       - uses: actions/checkout@v3
       - run: |
           make in-docker TARGET='test'
+
+  build-x86_64:
+    name: Run x86_64 build
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          make in-docker TARGET='dist' BUILD_TYPE='debug'
+
+  build-aarch64:
+    name: Run aarch64 build
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - run: |
+          make in-docker TARGET='dist' BUILD_TYPE='debug' TARGET_ARCH='aarch64-unknown-linux-gnu'

.releaserc.yaml

@@ -33,7 +33,9 @@ plugins:
   # Execute commands to build the project
   - - "@semantic-release/exec"
     - shell: true
-      prepareCmd: "make in-docker TARGET='dist'"
+      prepareCmd: |
+        make in-docker TARGET='dist'
+        make in-docker TARGET='dist' TARGET_ARCH="aarch64-unknown-linux-gnu"
 
   # Commit the following changes to git after other plugins have run
   - - "@semantic-release/git"
@@ -46,5 +48,5 @@ plugins:
     - assets:
         - path: dist/powerstation-*.rpm
         - path: dist/powerstation-*.rpm.sha256.txt
-        - path: dist/powerstation.tar.gz
-        - path: dist/powerstation.tar.gz.sha256.txt
+        - path: dist/powerstation-*.tar.gz
+        - path: dist/powerstation-*.tar.gz.sha256.txt

Cargo.toml

@@ -7,7 +7,7 @@ description = "Daemon for controlling TDP and performance over DBus"
 
 [package.metadata.generate-rpm]
 assets = [
-  { source = "./target/release/powerstation", dest = "/usr/bin/powerstation", mode = "755" },
+  { source = "target/release/powerstation", dest = "/usr/bin/powerstation", mode = "755" },
   { source = "./rootfs/usr/share/dbus-1/system.d/org.shadowblip.PowerStation.conf", dest = "/usr/share/dbus-1/system.d/org.shadowblip.PowerStation.conf", mode = "644" },
   { source = "./rootfs/usr/lib/systemd/system/powerstation.service", dest = "/usr/lib/systemd/system/powerstation.service", mode = "644" },
 ]

Dockerfile

@@ -1,7 +1,19 @@
-FROM rust:1.83
+FROM rust:1.86
 
+RUN dpkg --add-architecture arm64
 RUN apt-get update && apt-get install -y \
 	cmake \
 	build-essential \
 	libpci-dev \
 	libclang-15-dev
+
+RUN apt-get install -y \
+  g++-aarch64-linux-gnu \
+  libc6-dev-arm64-cross \
+  libpci-dev:arm64
+
+RUN rustup target add aarch64-unknown-linux-gnu
+
+ENV CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc
+ENV CC_aarch64_unknown_linux_gnu=aarch64-linux-gnu-gcc
+ENV CXX_aarch64_unknown_linux_gnu=aarch64-linux-gnu-g++

Makefile

@@ -1,6 +1,7 @@
 NAME := $(shell grep 'name =' Cargo.toml | head -n 1 | cut -d'"' -f2)
 VERSION := $(shell grep '^version =' Cargo.toml | cut -d'"' -f2)
-ARCH := $(shell uname -m)
+TARGET_ARCH ?= $(shell rustc -vV | sed -n 's/host: //p')
+ARCH := $(shell echo "$(TARGET_ARCH)" | cut -d'-' -f1)
 ALL_RS := $(shell find src -name '*.rs')
 PREFIX ?= /usr
 CACHE_DIR := .cache
@@ -28,7 +29,7 @@ help: ## Display this help.
 
 .PHONY: install
 install: build ## Install PowerStation to the given prefix (default: PREFIX=/usr)
-	install -D -m 755 target/release/powerstation \
+	install -D -m 755 target/$(TARGET_ARCH)/release/powerstation \
 		$(PREFIX)/bin/powerstation
 	install -D -m 644 rootfs/usr/share/dbus-1/system.d/org.shadowblip.PowerStation.conf \
 		$(PREFIX)/share/dbus-1/system.d/org.shadowblip.PowerStation.conf
@@ -47,21 +48,21 @@ uninstall: ## Uninstall PowerStation
 ##@ Development
 
 .PHONY: debug
-debug: target/debug/powerstation  ## Build debug build
-target/debug/powerstation: $(ALL_RS) Cargo.lock
-	cargo build
+debug: target/$(TARGET_ARCH)/debug/powerstation  ## Build debug build
+target/$(TARGET_ARCH)/debug/powerstation: $(ALL_RS) Cargo.lock
+	cargo build --target $(TARGET_ARCH)
 
 .PHONY: build
-build: target/release/powerstation ## Build release build
-target/release/powerstation: $(ALL_RS) Cargo.lock
-	cargo build --release
+build: target/$(TARGET_ARCH)/release/powerstation ## Build release build
+target/$(TARGET_ARCH)/release/powerstation: $(ALL_RS) Cargo.lock
+	cargo build --release --target $(TARGET_ARCH)
 
 .PHONY: all
 all: build debug ## Build release and debug builds
 
 .PHONY: run
 run: setup debug ## Build and run
-	sudo ./target/debug/powerstation
+	sudo ./target/$(TARGET_ARCH)/debug/powerstation
 
 .PHONY: test
 test: debug ## Build and run all tests
@@ -87,25 +88,25 @@ setup: /usr/share/dbus-1/system.d/org.shadowblip.PowerStation.conf ## Install db
 ##@ Distribution
 
 .PHONY: dist
-dist: dist/$(NAME).tar.gz dist/$(NAME)-$(VERSION)-1.$(ARCH).rpm ## Create all redistributable versions of the project
+dist: dist/$(NAME)-$(ARCH).tar.gz dist/$(NAME)-$(VERSION)-1.$(ARCH).rpm ## Create all redistributable versions of the project
 
 .PHONY: dist-archive
-dist-archive: dist/powerstation.tar.gz ## Build a redistributable archive of the project
-dist/powerstation.tar.gz: build
+dist-archive: dist/powerstation-$(ARCH).tar.gz ## Build a redistributable archive of the project
+dist/powerstation-$(ARCH).tar.gz: build
 	rm -rf $(CACHE_DIR)/powerstation
 	mkdir -p $(CACHE_DIR)/powerstation
 	$(MAKE) install PREFIX=$(CACHE_DIR)/powerstation/usr NO_RELOAD=true
 	mkdir -p dist
 	tar cvfz $@ -C $(CACHE_DIR) powerstation
-	cd dist && sha256sum powerstation.tar.gz > powerstation.tar.gz.sha256.txt
+	cd dist && sha256sum powerstation-$(ARCH).tar.gz > powerstation-$(ARCH).tar.gz.sha256.txt
 
 .PHONY: dist-rpm
 dist-rpm: dist/$(NAME)-$(VERSION)-1.$(ARCH).rpm ## Build a redistributable RPM package
-dist/$(NAME)-$(VERSION)-1.$(ARCH).rpm: target/release/$(NAME)
+dist/$(NAME)-$(VERSION)-1.$(ARCH).rpm: target/$(TARGET_ARCH)/release/$(NAME)
 	mkdir -p dist
 	cargo install cargo-generate-rpm
-	cargo generate-rpm
-	cp ./target/generate-rpm/$(NAME)-$(VERSION)-1.$(ARCH).rpm dist
+	cargo generate-rpm --target $(TARGET_ARCH)
+	cp ./target/$(TARGET_ARCH)/generate-rpm/$(NAME)-$(VERSION)-1.$(ARCH).rpm dist
 	cd dist && sha256sum $(NAME)-$(VERSION)-1.$(ARCH).rpm > $(NAME)-$(VERSION)-1.$(ARCH).rpm.sha256.txt
 
 INTROSPECT_CARD ?= Card2
@@ -166,6 +167,8 @@ in-docker: docker-builder
 		-v $(PWD):/src \
 		--workdir /src \
 		-e HOME=/home/build \
+		-e TARGET_ARCH=$(TARGET_ARCH) \
+		-e PKG_CONFIG_SYSROOT_DIR="/usr/$(ARCH)-linux-gnu" \
 		--user $(shell id -u):$(shell id -g) \
 		$(IMAGE_NAME):$(IMAGE_TAG) \
 		make $(TARGET)