Comment # 3 on bug 925024 from Michael Lanczak

Here a little program which is able for running: a window with
gtk_button_new_from_icon_name. You can change the path or the icon name, you
see here always no icon!
/* --------------------------------------------------------------------*/

#include <gtk/gtk.h>

void program_end(GtkWidget *window)
{
    gtk_widget_destroy(window);
    gtk_main_quit();
}

int main (int argc, char *argv[])
{
    GtkWidget *window;
    GtkWidget *button;

    gtk_init (&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"Iconbuttontest");
    gtk_window_set_default_size(GTK_WINDOW(window),200,50);
    gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER_ALWAYS);
    g_signal_connect(G_OBJECT(window),"destroy",G_CALLBACK(program_end),NULL);

    //button =
gtk_button_new_from_icon_name("/usr/local/share/pixmaps/anjuta/anjuta-breakpoint-enabled-16.png",GTK_ICON_SIZE_BUTTON);
    button =
gtk_button_new_from_icon_name("/usr/share/icons/Adwaita/16x16/actions/process-stop.png",GTK_ICON_SIZE_BUTTON);
    g_signal_connect_swapped (G_OBJECT(button),"clicked",
                              G_CALLBACK(program_end),G_OBJECT(window));
    gtk_container_add(GTK_CONTAINER(window),button);
    gtk_widget_show_all(window);

    gtk_main ();
    return 0;
}