jamulussoftware · hoffie · Mar 21, 2022 · Mar 19, 2022 · Mar 20, 2022 · Mar 19, 2022
diff --git a/.github/autobuild/linux_deb.sh b/.github/autobuild/linux_deb.sh
@@ -6,30 +6,72 @@ if [[ ! ${jamulus_buildversionstring:-} =~ [0-9]+\.[0-9]+\.[0-9]+ ]]; then
     exit 1
 fi
 
+TARGET_ARCH="${TARGET_ARCH:-amd64}"
+case "${TARGET_ARCH}" in
+    amd64)
+        ABI_NAME=""
+        ;;
+    armhf)
+        ABI_NAME="arm-linux-gnueabihf"
+        ;;
+    *)
+        echo "Unsupported TARGET_ARCH ${TARGET_ARCH}"
+        exit 1
+esac
+
 setup() {
+    setup_cross_compilation_apt_sources
+
     echo "Update system..."
     sudo apt-get -qq update
 
     echo "Install dependencies..."
-    sudo apt-get -qq --no-install-recommends -y install devscripts build-essential debhelper libjack-jackd2-dev qtbase5-dev qttools5-dev-tools
+    sudo apt-get -qq --no-install-recommends -y install devscripts build-essential debhelper fakeroot libjack-jackd2-dev qtbase5-dev qttools5-dev-tools
+
+    setup_cross_compiler
+}
+
+setup_cross_compilation_apt_sources() {
+    if [[ "${TARGET_ARCH}" == amd64 ]]; then
+       return
+    fi
+    sudo dpkg --add-architecture "${TARGET_ARCH}"
+    sed -rne "s|^deb.*/ ([^ -]+(-updates)?) main.*|deb [arch=${TARGET_ARCH}] http://ports.ubuntu.com/ubuntu-ports \1 main universe multiverse restricted|p" /etc/apt/sources.list | sudo dd of=/etc/apt/sources.list.d/"${TARGET_ARCH}".list
+    sudo sed -re 's/^deb /deb [arch=amd64,i386] /' -i /etc/apt/sources.list
+}
+
+setup_cross_compiler() {
+    if [[ "${TARGET_ARCH}" == amd64 ]]; then
+        return
+    fi
+    GCC_VERSION=7  # 7 is the default on 18.04, there is no reason not to update once 18.04 is out of support
+    sudo apt install -qq -y --no-install-recommends "g++-${GCC_VERSION}-${ABI_NAME}" "qt5-qmake:${TARGET_ARCH}" "qtbase5-dev:${TARGET_ARCH}" "libjack-jackd2-dev:${TARGET_ARCH}"
+    sudo update-alternatives --install "/usr/bin/${ABI_NAME}-g++" g++ "/usr/bin/${ABI_NAME}-g++-${GCC_VERSION}" 10
+    sudo update-alternatives --install "/usr/bin/${ABI_NAME}-gcc" gcc "/usr/bin/${ABI_NAME}-gcc-${GCC_VERSION}" 10
+
+    if [[ "${TARGET_ARCH}" == armhf ]]; then
+        # Ubuntu's Qt version only ships a profile for gnueabi, but not for gnueabihf. Therefore, build a custom one:
+        sudo cp -R "/usr/lib/${ABI_NAME}/qt5/mkspecs/linux-arm-gnueabi-g++/" "/usr/lib/${ABI_NAME}/qt5/mkspecs/${ABI_NAME}-g++/"
+        sudo sed -re 's/-gnueabi/-gnueabihf/' -i "/usr/lib/${ABI_NAME}/qt5/mkspecs/${ABI_NAME}-g++/qmake.conf"
+    fi
 }
 
 build_app_as_deb() {
-    ./linux/deploy_deb.sh
+    TARGET_ARCH="${TARGET_ARCH}" ./linux/deploy_deb.sh
 }
 
 pass_artifacts_to_job() {
     mkdir deploy
 
     # rename headless first, so wildcard pattern matches only one file each
-    artifact_deploy_filename_1="jamulus_headless_${jamulus_buildversionstring}_ubuntu_amd64.deb"
+    artifact_deploy_filename_1="jamulus_headless_${jamulus_buildversionstring}_ubuntu_${TARGET_ARCH}.deb"
     echo "Moving headless build artifact to deploy/${artifact_deploy_filename_1}"
-    mv ../jamulus-headless*_amd64.deb "./deploy/${artifact_deploy_filename_1}"
+    mv ../jamulus-headless*"_${TARGET_ARCH}.deb" "./deploy/${artifact_deploy_filename_1}"
     echo "::set-output name=artifact_1::${artifact_deploy_filename_1}"
 
-    artifact_deploy_filename_2="jamulus_${jamulus_buildversionstring}_ubuntu_amd64.deb"
+    artifact_deploy_filename_2="jamulus_${jamulus_buildversionstring}_ubuntu_${TARGET_ARCH}.deb"
     echo "Moving regular build artifact to deploy/${artifact_deploy_filename_2}"
-    mv ../jamulus*_amd64.deb "./deploy/${artifact_deploy_filename_2}"
+    mv ../jamulus*_"${TARGET_ARCH}.deb" "./deploy/${artifact_deploy_filename_2}"
     echo "::set-output name=artifact_2::${artifact_deploy_filename_2}"
 }
 

diff --git a/.github/workflows/autobuild.yml b/.github/workflows/autobuild.yml
@@ -94,14 +94,22 @@ jobs:
             # Jamulus.pro needs to count git history length for android versioning:
             checkout_fetch_depth:   '0'
 
-          - config_name:            Linux .deb (artifacts+codeQL)
+          - config_name:            Linux .deb amd64 (artifacts+codeQL)
             target_os:              linux
             building_on_os:         ubuntu-18.04
             cmd1_prebuild:          ./.github/autobuild/linux_deb.sh setup
             cmd2_build:             ./.github/autobuild/linux_deb.sh build
             cmd3_postbuild:         ./.github/autobuild/linux_deb.sh get-artifacts
             run_codeql:             true
 
+          - config_name:            Linux .deb armhf (artifacts)
+            target_os:              linux
+            building_on_os:         ubuntu-18.04
+            cmd1_prebuild:          TARGET_ARCH=armhf ./.github/autobuild/linux_deb.sh setup
+            cmd2_build:             TARGET_ARCH=armhf ./.github/autobuild/linux_deb.sh build
+            cmd3_postbuild:         TARGET_ARCH=armhf ./.github/autobuild/linux_deb.sh get-artifacts
+            run_codeql:             false
+
           - config_name:            MacOS (artifacts+codeQL)
             target_os:              macos
             # Stay on 10.15 as long as we use dmgbuild which does not work with 11's hdiutil (?):

diff --git a/distributions/debian/rules b/distributions/debian/rules
@@ -1,13 +1,22 @@
 #!/usr/bin/make -f
 
 export QT_SELECT=qt5
+DEB_TARGET_GNU_TYPE := $(shell dpkg-architecture -qDEB_TARGET_GNU_TYPE)
+DEB_HOST_GNU_TYPE := $(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
+DEB_BUILD_GNU_TYPE := $(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)
+
+ifeq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
+	QMAKE := qmake
+else
+	QMAKE := "/usr/lib/$(DEB_BUILD_GNU_TYPE)/qt5/bin/qmake" -qtconf "/usr/lib/$(DEB_TARGET_GNU_TYPE)/qt5/qt.conf" -spec "/usr/lib/$(DEB_TARGET_GNU_TYPE)/qt5/mkspecs/$(DEB_TARGET_GNU_TYPE)-g++" LIBS+="-lstdc++ -lm"
+endif
 
 %:
 	dh $@
 
 override_dh_auto_configure:
-	mkdir -p build-gui && cd build-gui && qmake "CONFIG+=noupcasename" PREFIX=/usr ../Jamulus.pro
-	mkdir -p build-nox && cd build-nox && qmake "CONFIG+=nosound headless" TARGET=jamulus-headless PREFIX=/usr ../Jamulus.pro
+	mkdir -p build-gui && cd build-gui && $(QMAKE) "CONFIG+=noupcasename" PREFIX=/usr ../Jamulus.pro
+	mkdir -p build-nox && cd build-nox && $(QMAKE) "CONFIG+=nosound headless" TARGET=jamulus-headless PREFIX=/usr ../Jamulus.pro
 
 override_dh_auto_build:
 	cd src/res/translation && lrelease *.ts

diff --git a/linux/deploy_deb.sh b/linux/deploy_deb.sh
@@ -1,7 +1,10 @@
-#!/bin/sh -e
+#!/bin/bash
+set -eu
 
 # Create deb files
 
+TARGET_ARCH="${TARGET_ARCH:-amd64}"
+
 cp -r distributions/debian .
 
 # get the jamulus version from pro file
@@ -22,4 +25,7 @@ echo
 
 echo "${VERSION} building..."
 
-debuild --preserve-env -b -us -uc
+CC=$(dpkg-architecture -A"${TARGET_ARCH}" -qDEB_TARGET_GNU_TYPE)-gcc
+# Note: debuild only handles -a, not the long form --host-arch
+# There must be no space after -a either, otherwise debuild cannot recognize it and fails during Changelog checks.
+CC="${CC}" debuild --preserve-env -b -us -uc -j -a"${TARGET_ARCH}" --target-arch "${TARGET_ARCH}"