Add support for armv6 (raspberry pi) to CD

.github/scripts/install-dependencies.sh

@@ -1,64 +1,83 @@
 #!/bin/bash
 
+set -e
 set -x
 
-ARCH=${1}          # arm, aarch64, i386, x86_64
-ABI=${2}           # gnu, gnueabihf
-DEBARCH=${3}       # i386, amd64, armhf, arm64
-BUILD_TYPE=${4}    # slim, default, full
+ARCH=${1}          # armv6, armhf, arm64
+BINARCH=${2}       # arm, aarch64, i386, x86_64
+ABI=${3}           # gnu, gnueabihf
+DEBARCH=${4}       # i386, amd64, armhf, arm64
+BUILD_TYPE=${5}    # slim, default, full
 
 export DEBIAN_FRONTEND=noninteractive
 
 # Native sources
-cat > /etc/apt/sources.list << EOT_NATIVE
+cat | sudo tee /etc/apt/sources.list > /dev/null << EOT_NATIVE
 deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse
 deb [arch=amd64] http://archive.ubuntu.com/ubuntu/ focal-updates main restricted universe multiverse
 deb [arch=amd64] http://security.ubuntu.com/ubuntu/ focal-security main restricted universe multiverse
 EOT_NATIVE
 
 # If building cross, cross sources
-if [ "${ARCH}" != "$(uname -m)" ]; then
-	cat > /etc/apt/sources.list.d/cross.list << EOT_CROSS
+if [ "${BINARCH}" != "$(uname -m)" ]; then
+	cat | sudo tee /etc/apt/sources.list.d/cross.list > /dev/null << EOT_CROSS
 deb [arch=$DEBARCH] http://ports.ubuntu.com/ focal main restricted universe multiverse
 deb [arch=$DEBARCH] http://ports.ubuntu.com/ focal-updates main restricted universe multiverse
 deb [arch=$DEBARCH] http://ports.ubuntu.com/ focal-security main restricted universe multiverse
 EOT_CROSS
 else
-	rm -f /etc/apt/sources.list.d/cross.list
+	sudo rm -f /etc/apt/sources.list.d/cross.list
 fi
 
-dpkg --add-architecture ${DEBARCH}
-apt-get update
-
 # Setup magic vars for foreign packages
-if [ "${ARCH}" != "$(uname -m)" ]; then
+if [ "${BINARCH}" != "$(uname -m)" ]; then
+	if [ "${ARCH}" != "armv6" ]; then
+		BUILD_PKGS="gcc-${BINARCH}-linux-${ABI} libc6-${DEBARCH}-cross libc6-dev-${DEBARCH}-cross pkg-config"
+	else
+		BUILD_PKGS="curl libc6-${DEBARCH}-cross libc6-dev-${DEBARCH}-cross pkg-config"
+	fi
 	CROSS=":${DEBARCH}"
-	BUILD_PKGS="gcc-${ARCH}-linux-${ABI} libc6-${DEBARCH}-cross libc6-dev-${DEBARCH}-cross pkg-config"
-	dpkg --add-architecture ${DEBARCH}
+	sudo dpkg --add-architecture ${DEBARCH}
 else
 	CROSS=""
 	BUILD_PKGS="gcc libc6 libc6-dev pkg-config"
 fi
 
+sudo apt-get update
+
 # Always install all dependencies, even if we are building default or even slim
 BUILDDEP_SLIM="libasound2-dev${CROSS} libssl-dev${CROSS} libpulse-dev${CROSS} libdbus-1-dev${CROSS} libssl1.1${CROSS}"
-BUILDDEP_DEFAULT="libdbus-1-dev${CROSS} libdbus-1-3${CROSS} libsystemd0${CROSS} libgcrypt20${CROSS} liblzma5${CROSS} liblz4-1${CROSS} libgpg-error0${CROSS}"
+BUILDDEP_DEFAULT="libdbus-1-dev${CROSS} libdbus-1-3${CROSS} libsystemd0${CROSS} libsystemd-dev${CROSS} libgcrypt20${CROSS} libgcrypt20-dev${CROSS} liblzma5${CROSS} liblzma-dev${CROSS} liblz4-1${CROSS} liblz4-dev${CROSS} libgpg-error0${CROSS} libgpg-error-dev${CROSS}"
 BUILDDEP_FULL="libpulse-dev${CROSS}"
 
-apt-get install -y \
+sudo apt-get install -y \
+	build-essential \
 	${BUILD_PKGS} \
 	${BUILDDEP_SLIM} \
 	${BUILDDEP_DEFAULT} \
 	${BUILDDEP_FULL}
 
+if [ "${ARCH}" == "armv6" ]; then
+	curl -L -o /tmp/toolchain.tar.bz2 https://toolchains.bootlin.com/downloads/releases/toolchains/armv6-eabihf/tarballs/armv6-eabihf--glibc--stable-2020.08-1.tar.bz2
+	sudo mkdir /opt/toolchain
+	sudo chown $(whoami) /opt/toolchain
+	tar -C /opt/toolchain --strip-components=1 -jxf /tmp/toolchain.tar.bz2
+	echo "/opt/toolchain/bin" >> $GITHUB_PATH
+fi
+
 # Tell rust to cross-compile
-if [ "${ARCH}" != "$(uname -m)" ]; then
+if [ "${BINARCH}" != "$(uname -m)" ]; then
 	mkdir -p ~/.cargo
+	if [ "${ARCH}" != "armv6" ]; then
+		LINKER="${BINARCH}-linux-${ABI}-gcc"
+	else
+		LINKER="arm-buildroot-linux-gnueabihf-gcc"
+	fi
 	cat >> ~/.cargo/config << EOT_CARGO
-[target.${ARCH}-unknown-linux-${ABI}]
-linker = "${ARCH}-linux-${ABI}-gcc"
+[target.${BINARCH}-unknown-linux-${ABI}]
+linker = "${LINKER}"
 
-[target.${ARCH}-unknown-linux-${ABI}.dbus]
+[target.${BINARCH}-unknown-linux-${ABI}.dbus]
 rustc-link-lib = ["dbus-1", "gcrypt", "gpg-error", "lz4", "lzma", "systemd"]
 EOT_CARGO
 fi

.github/scripts/setup-vars.sh

@@ -22,7 +22,13 @@ fi
 
 # only when cross-building on linux
 if [ "${BUILD_TARGET}" == "linux" ] && [ "${ARCH}" != "$(uname -m)" ]; then
-	echo "RUSTFLAGS=-C linker=${BINARCH}-linux-${ABI}-gcc"
 	echo "PKG_CONFIG_ALLOW_CROSS=1"
 	echo "PKG_CONFIG_LIBDIR=/usr/lib/${BINARCH}-linux-${ABI}/pkgconfig/"
 fi
+
+# raspberry pi toolchain doesn't search in the right places automatically
+if [ "${ARCH}" == "armv6" ]; then
+	echo "CC=arm-buildroot-linux-gnueabihf-gcc"
+	echo "CFLAGS=-march=armv6 -I/usr/include -I/usr/include/arm-linux-gnueabihf -L/usr/lib/arm-linux-gnueabihf" # needed for cc crate in rust-openssl's build main.rs (expando)
+	echo "RUSTFLAGS=-Clinker=arm-buildroot-linux-gnueabihf-gcc -L/usr/lib/arm-linux-gnueabihf"
+fi

.github/workflows/cd.yml

@@ -13,19 +13,31 @@ jobs:
       matrix:
         build_target: [linux, macos]
         artifact_type: [slim, default, full]
-        arch: [x86_64, armhf, arm64] # "our" name of the arch. How debian, rust and gcc call them will be set later
+        arch: [x86_64, armv6, armhf, arm64] # "our" name of the arch. How debian, rust and gcc call them will be set later
         # remove unwanted combinations. Arm64 macos is not supported by GH right now
         exclude:
+        - build_target: macos
+          arch: armv6
         - build_target: macos
           arch: armhf
         - build_target: macos
           arch: arm64
+        - build_target: linux
+          arch: armv6
+          artifact_type: default
+        - build_target: linux
+          arch: armv6
+          artifact_type: full
         include:
         # Setup Arch-specific defaults. Different systems use different names
         - arch: x86_64
           abi: gnu
           binarch: x86_64
           debarch: amd64
+        - arch: armv6
+          abi: gnueabihf
+          binarch: arm
+          debarch: armhf
         - arch: armhf
           abi: gnueabihf
           binarch: arm
@@ -43,9 +55,9 @@ jobs:
         - artifact_type: slim
           features: ''                       # Slim version has no features enabled by default.
         - artifact_type: 'default'
-          feature: 'dbus_keyring,dbus_mpris' # Default version has all extra features enabled
+          features: 'dbus_keyring,dbus_mpris' # Default version has all extra features enabled
         - artifact_type: 'full'
-          feature: 'dbus_keyring,dbus_mpris' # Full version has all extra features and audio backends enabled
+          features: 'dbus_keyring,dbus_mpris' # Full version has all extra features and audio backends enabled
         ## Setup audio backends
         # MacOS
         - build_target: macos
@@ -84,13 +96,14 @@ jobs:
       run: brew install awk dbus pkg-config portaudio
     - name: Installing needed Ubuntu dependencies
       if: matrix.build_target == 'linux'
-      run: sudo bash .github/scripts/install-dependencies.sh ${{ matrix.binarch }} ${{ matrix.abi }} ${{ matrix.debarch }} ${{ matrix.artifact_type }}
+      run: |
+        .github/scripts/install-dependencies.sh ${{ matrix.arch }} ${{ matrix.binarch }} ${{ matrix.abi }} ${{ matrix.debarch }} ${{ matrix.artifact_type }}
     - name: Running cargo build
       uses: actions-rs/cargo@v1
       with:
         command: build
         toolchain: ${{ matrix.rust }}
-        args: --locked --release --target ${{ env.RUST_TARGET }} --no-default-features --features "${{ matrix.feature }},${{ matrix.audio_backend }}"
+        args: --locked --release --target ${{ env.RUST_TARGET }} --no-default-features --features "${{ matrix.features }},${{ matrix.audio_backend }}"
     - name: Packaging final binary
       shell: bash
       run: |