The gtk-icon-cache
class
generates the proper post-install and post-remove (postinst/postrm)
scriptlets for packages that use GTK+ and install icons.
These scriptlets call gtk-update-icon-cache
to add
the fonts to GTK+'s icon cache.
Since the cache files are architecture-specific,
gtk-update-icon-cache
is run using QEMU if the
postinst scriptlets need to be run on the build host during image
creation.