CI: build nightly AppImage for aarch64

.github/workflows/nightly.yml

@@ -13,14 +13,18 @@ jobs:
   AppImage:
     if: github.repository == 'darktable-org/darktable' || github.event_name == 'workflow_dispatch'
     name: Nightly darktable AppImage
-    runs-on: ubuntu-22.04
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
-        compiler:
-          - { compiler: GNU12, CC: gcc-12, CXX: g++-12, packages: gcc-12 g++-12 }
+        os: [ubuntu-22.04, ubuntu-24.04-arm]
         branch:
           - { code: master, label: gitmaster }
+        include:
+          - os: ubuntu-22.04
+            compiler: { compiler: GNU12, CC: gcc-12, CXX: g++-12, packages: gcc-12 g++-12 }
+          - os: ubuntu-24.04-arm
+            compiler: { compiler: GNU14, CC: gcc-14, CXX: g++-14, packages: gcc-14 g++-14 }
     env:
       CC: ${{ matrix.compiler.CC }}
       CXX: ${{ matrix.compiler.CXX }}
@@ -424,7 +428,7 @@ jobs:
 
             Also, new versions can make changes to the database schema, so it's best to run them with a separate library.
 
-            The AppImage package is compatible with distribution releases that have glibc version 2.35 or higher. For example, if we consider some popular distributions, Ubuntu 22.04, Debian 12, Fedora 36 and newer releases are compatible.
+            The `*-x86_64.AppImage` package is compatible with distribution releases that have glibc version 2.35 or higher. For example, if we consider some popular distributions, Ubuntu 22.04, Debian 12, Fedora 36 and newer releases are compatible. The `*-aarch64.AppImage` package requires glibc 2.39 or higher (e.g. Ubuntu 24.04, Debian 13, Fedora 40 and newer).
 
             The `*.AppImage.zsync` file is not intended to be downloaded and used locally. Just ignore it. This file contains technical information required by AppImage auto-updaters such as [AppImageUpdate](https://appimage.github.io/AppImageUpdate/).
 

tools/appimage-build-script.sh

@@ -52,13 +52,14 @@ cp -a /var/lib/lensfun-updates/* ../AppDir/usr/share/lensfun
 # environment variable in AppRun.wrapped accordingly when starting
 # AppImage so that libgphoto2 can find these drivers.
 mkdir -p ../AppDir/usr/lib/libgphoto2
-cp -a /usr/lib/x86_64-linux-gnu/libgphoto2/* ../AppDir/usr/lib/libgphoto2
+ARCH=$(uname -m)
+cp -a /usr/lib/$ARCH-linux-gnu/libgphoto2/* ../AppDir/usr/lib/libgphoto2
 
 # Include gphoto2 port libraries. We also have to set the IOLIBS
 # environment variable in AppRun.wrapped accordingly when starting
 # AppImage so that libgphoto2 can find these drivers.
 mkdir -p ../AppDir/usr/lib/libgphoto2_port
-cp -a /usr/lib/x86_64-linux-gnu/libgphoto2_port/* ../AppDir/usr/lib/libgphoto2_port
+cp -a /usr/lib/$ARCH-linux-gnu/libgphoto2_port/* ../AppDir/usr/lib/libgphoto2_port
 
 # Include networking related GIO modules. We also have to set the GIO_EXTRA_MODULES
 # environment variable in AppRun.wrapped accordingly when starting AppImage
@@ -67,14 +68,13 @@ cp -a /usr/lib/x86_64-linux-gnu/libgphoto2_port/* ../AppDir/usr/lib/libgphoto2_p
 # may be incompatibility issues with different versions of glib in the bundle and
 # on the host system, see https://github.com/darktable-org/darktable/issues/19266
 mkdir -p ../AppDir/usr/lib/gio
-cp -a /usr/lib/x86_64-linux-gnu/gio/* ../AppDir/usr/lib/gio
+cp -a /usr/lib/$ARCH-linux-gnu/gio/* ../AppDir/usr/lib/gio
 
 # Since linuxdeploy is itself an AppImage, we don't rely on it being installed
 # on the build system, but download it every time we run this script. If that
 # doesn't suit you (for example, you want to build an AppImage without an
 # Internet connection), you can edit this script accordingly, and call
 # linuxdeploy and its plugin from where you put them.
-ARCH=$(uname -m)
 wget -c --no-verbose "https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-$ARCH.AppImage"
 wget -c --no-verbose "https://raw.githubusercontent.com/linuxdeploy/linuxdeploy-plugin-gtk/master/linuxdeploy-plugin-gtk.sh"