CI Linux arm: use common build flags

Some features that are used by x86_64 Linux build are disabled, for the
rest dependencies are installed.

disabled:
- CUDA features
- lavc vdpau
- lavc vaapi
- Qt GUI
- Cineform

dependencies installed:
- libsdl2-ttf
- libsdl2-mixer

.github/scripts/Linux/arm/bootstrap.sh

@@ -47,7 +47,8 @@ apt -y install libasound2-dev portaudio19-dev libjack-dev
 apt -y install libglew-dev libglfw3-dev libglm-dev
 apt -y install libcaca-dev libmagickwand-dev libnatpmp-dev libopencv-core-dev libopencv-imgproc-dev libv4l-dev
 apt -y install libavcodec-dev libavformat-dev libswscale-dev libraspberrypi-dev
-apt -y install libdrm-dev
+apt -y install libdrm-dev\
+  libsdl2-mixer-dev libsdl2-ttf-dev\
 
 /.github/scripts/install-common-deps.sh
 /.github/scripts/Linux/install_others.sh ndi pipewire ximea

.github/scripts/environment.sh

@@ -31,6 +31,10 @@ export CHANNEL TAG VERSION
 
 printf '%b' "CHANNEL=$CHANNEL\nTAG=$TAG\nVERSION=$VERSION\n" >> "$GITHUB_ENV"
 
+is_arm() {
+        [ "$(uname -m)" = arm64 ] || [ "$GITHUB_WORKFLOW" = 'ARM builds' ]
+}
+
 export FEATURES="\
  --enable-option-checking=fatal\
  --with-live555=/usr/local\
@@ -74,9 +78,14 @@ export FEATURES="\
 CUDA_FEATURES="--enable-cuda_dxt --enable-gpujpeg --enable-ldgm-gpu --enable-uyvy"
 case "$RUNNER_OS" in
         Linux)
-                FEATURES="$FEATURES $CUDA_FEATURES --enable-plugins\
- --enable-alsa --enable-lavc-hw-accel-vaapi --enable-lavc-hw-accel-vdpau\
- --enable-pipewire-audio --enable-v4l2"
+                FEATURES="$FEATURES --enable-plugins --enable-alsa \
+--enable-pipewire-audio --enable-v4l2"
+                if is_arm; then
+                        FEATURES="$FEATURES --disable-qt"
+                else
+                        FEATURES="$FEATURES $CUDA_FEATURES \
+--enable-lavc-hw-accel-vaapi --enable-lavc-hw-accel-vdpau"
+                fi
                 ;;
         macOS)
                 FEATURES="$FEATURES --enable-avfoundation --enable-coreaudio --enable-syphon"
@@ -90,7 +99,7 @@ case "$RUNNER_OS" in
                 ;;
 esac
 
-if [ "$(uname -s)" != Darwin ] || [ "$(uname -m)" != arm64 ]; then
+if ! is_arm; then
         FEATURES="$FEATURES --enable-cineform"
 fi
 

.github/workflows/arm-build.yml

@@ -29,6 +29,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+    - name: Init environment variables
+      run: . .github/scripts/environment.sh
     - name: Prepare
       run: |
         sudo apt update
@@ -76,6 +78,7 @@ jobs:
       run: |
         sudo cp -ar $GITHUB_WORKSPACE ~/chroot/UltraGrid
         env | grep -v '^\(HOME\)\|\(USER\)' | sed -e "s/=/='/" -e "s/$/'/" | sudo tee ~/chroot/envvars
+        echo "FEATURES=\"$FEATURES\"" | sudo tee -a ~/chroot/envvars
         sudo chroot ~/chroot /bin/sh -ec "set -a; . /envvars; set +a; cd UltraGrid; .github/scripts/Linux/arm/build.sh"
     - name: Upload Release Asset
       id: upload-release-asset