update-gtk-immodules (1) - Linux Manuals
update-gtk-immodules: Update GTK+ immodule cache
update-gtk-immodules - Update GTK+ immodule cache
- update-gtk-immodules [HOST_TRIPLET]
It needs to be given a GNU-style host triplet as argument, such as "x86_64-redhat-linux-gnu". This argument determines where the tool saves the gtk.immodules file that it creates. It must be the same as the host triplet that GTK+ was configured with.
$libdir/gtk-2.0/2.10.0/immodules.cache - the file created by update-gtk-immodules.