Cannot find GTK on Debian 12 i386

[rmartin16]

Doing some experimenting on i386 Debian and the plugin errored when trying to install GTK in to the AppImage.

The issue stems from how the library prefix is derived in search_library_path:

    PATH_ARRAY=(
        "/usr/lib/$(uname -m)-linux-gnu"
        "/usr/lib64"
        "/usr/lib"
    )

The arch returned from uname -m is i686 but the relevant directory is /usr/lib/i386-linux-gnu/. And since /usr/lib64/ exists, it uses that instead.

LD_GTK_LIBRARY_PATH=/usr/lib/i386-linux-gnu/ is a pretty simple workaround though.

Partial AppImage Build Log

[gtk/stdout] Installing GTK 3.0 modules
[gtk/stderr] ++ local library=gtk+-3.0
[gtk/stdout] /usr/lib64 ~/tmp/beeware/helloworld/build/helloworld/linux/appimage
[gtk/stderr] ++ local default_value=/usr
[gtk/stderr] +++ pkgconf --variable=exec_prefix gtk+-3.0
[gtk/stderr] ++ pkgconfig_ret=
[gtk/stderr] ++ '[' -n '' ']'
[gtk/stderr] ++ '[' -n /usr ']'
[gtk/stderr] ++ echo /usr
[gtk/stderr] + gtk3_exec_prefix=/usr
[gtk/stderr] ++ get_pkgconf_variable libdir gtk+-3.0 /usr/lib64
[gtk/stderr] ++ local variable=libdir
[gtk/stderr] ++ local library=gtk+-3.0
[gtk/stderr] ++ local default_value=/usr/lib64
[gtk/stderr] +++ pkgconf --variable=libdir gtk+-3.0
[gtk/stderr] ++ pkgconfig_ret=
[gtk/stderr] ++ '[' -n '' ']'
[gtk/stderr] ++ '[' -n /usr/lib64 ']'
[gtk/stderr] ++ echo /usr/lib64
[gtk/stderr] + gtk3_libdir=/usr/lib64/gtk-3.0
[gtk/stderr] + gtk3_path=/usr/lib64/gtk-3.0
[gtk/stderr] ++ get_pkgconf_variable gtk_binary_version gtk+-3.0 3.0.0
[gtk/stderr] ++ local variable=gtk_binary_version
[gtk/stderr] ++ local library=gtk+-3.0
[gtk/stderr] ++ local default_value=3.0.0
[gtk/stderr] +++ pkgconf --variable=gtk_binary_version gtk+-3.0
[gtk/stderr] ++ pkgconfig_ret=
[gtk/stderr] ++ '[' -n '' ']'
[gtk/stderr] ++ '[' -n 3.0.0 ']'
[gtk/stderr] ++ echo 3.0.0
[gtk/stderr] + gtk3_immodulesdir=/usr/lib64/gtk-3.0/3.0.0/immodules
[gtk/stderr] ++ get_pkgconf_variable gtk_binary_version gtk+-3.0 3.0.0
[gtk/stderr] ++ local variable=gtk_binary_version
[gtk/stderr] ++ local library=gtk+-3.0
[gtk/stderr] ++ local default_value=3.0.0
[gtk/stderr] +++ pkgconf --variable=gtk_binary_version gtk+-3.0
[gtk/stderr] ++ pkgconfig_ret=
[gtk/stderr] ++ '[' -n '' ']'
[gtk/stderr] ++ '[' -n 3.0.0 ']'
[gtk/stderr] ++ echo 3.0.0
[gtk/stderr] + gtk3_printbackendsdir=/usr/lib64/gtk-3.0/3.0.0/printbackends
[gtk/stderr] ++ dirname /usr/lib64/gtk-3.0/3.0.0/immodules
[gtk/stderr] + gtk3_immodules_cache_file=/usr/lib64/gtk-3.0/3.0.0/immodules.cache
[gtk/stderr] ++ search_tool gtk-query-immodules-3.0 libgtk-3-0
[gtk/stderr] ++ local tool=gtk-query-immodules-3.0
[gtk/stderr] ++ local directory=libgtk-3-0
[gtk/stderr] ++ command -v gtk-query-immodules-3.0
[gtk/stderr] ++ PATH_ARRAY=("/usr/lib/$(uname -m)-linux-gnu/$directory/$tool" "/usr/lib64/$directory/$tool" "/usr/lib/$directory/$tool" "/usr/bin/$tool" "/usr/bin/$tool-64" "/usr/bin/$tool-32")
[gtk/stderr] +++ uname -m
[gtk/stderr] ++ for path in "${PATH_ARRAY[@]}"
[gtk/stderr] ++ '[' -x /usr/lib/i686-linux-gnu/libgtk-3-0/gtk-query-immodules-3.0 ']'
[gtk/stderr] ++ for path in "${PATH_ARRAY[@]}"
[gtk/stderr] ++ '[' -x /usr/lib64/libgtk-3-0/gtk-query-immodules-3.0 ']'
[gtk/stderr] ++ for path in "${PATH_ARRAY[@]}"
[gtk/stderr] ++ '[' -x /usr/lib/libgtk-3-0/gtk-query-immodules-3.0 ']'
[gtk/stderr] ++ for path in "${PATH_ARRAY[@]}"
[gtk/stderr] ++ '[' -x /usr/bin/gtk-query-immodules-3.0 ']'
[gtk/stderr] ++ for path in "${PATH_ARRAY[@]}"
[gtk/stderr] ++ '[' -x /usr/bin/gtk-query-immodules-3.0-64 ']'
[gtk/stderr] ++ for path in "${PATH_ARRAY[@]}"
[gtk/stderr] ++ '[' -x /usr/bin/gtk-query-immodules-3.0-32 ']'
[gtk/stderr] + gtk3_immodules_query=
[gtk/stderr] + copy_lib_tree /usr/lib64/gtk-3.0 '/home/user/tmp/beeware/helloworld/build/helloworld/linux/appimage/Hello World.AppDir/'
[gtk/stderr] + src=('/usr/lib64/gtk-3.0')
[gtk/stderr] + local src
[gtk/stderr] + local 'dst=/home/user/tmp/beeware/helloworld/build/helloworld/linux/appimage/Hello World.AppDir/'
[gtk/stderr] + for elem in "${src[@]}"
[gtk/stderr] + mkdir -p '/home/user/tmp/beeware/helloworld/build/helloworld/linux/appimage/Hello World.AppDir/usr/lib/gtk-3.0'
[gtk/stderr] + pushd /usr/lib64
[gtk/stderr] ++ realpath --relative-to=/usr/lib64 /usr/lib64/gtk-3.0
[gtk/stderr] + cp gtk-3.0 --archive --parents '--target-directory=/home/user/tmp/beeware/helloworld/build/helloworld/linux/appimage/Hello World.AppDir//usr/lib' --verbose
[gtk/stderr] cp: cannot stat 'gtk-3.0': No such file or directory
ERROR: Failed to run plugin: gtk (exit code: 1) 

[TheTumultuousUnicornOfDarkness]

@rmartin16 what is the output of the dpkg --print-architecture command on your system, please?

[rmartin16]

@rmartin16 what is the output of the dpkg --print-architecture command on your system, please?

$ dpkg --print-architecture
i386