Custom symbolic icons in gtk4 not rendering in appimage

Question

When I make an appimage of my simple gtk4 application and run it on certain distros like fedora the svg icons don't render properly. It looks like this: https://i.imgur.com/3cKKkjx.png

The basic code for loading them is:

    GtkIconTheme *theme = gtk_icon_theme_get_for_display(gdk_display_get_default());
    gtk_icon_theme_add_search_path(theme, "data/icons/");

This repo contains the compiled executable and appimage together with the bundled libraries: https://github.com/zagortenay333/temp

And here is the source code: https://github.com/zagortenay333/kronomi

I tried both using the custom icons from a directory as well bundling them as a gresource.

Again, it renders correctly on ubuntu based distros but not fedora and manjaro for instance.

zagortenay333 · Accepted Answer · 2025-10-12 19:08:50Z

0

Placing the line:

export GDK_PIXBUF_MODULE_FILE="usr/lib/gdk-pixbuf-2.0/2.10.0/loaders.cache"

into the AppRun script fixes the problem.

answered Oct 12 at 19:08

zagortenay333

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