Last modified: 2013-03-15 09:53:22 UTC
In r96489, maintenance scripts dumpInterwiki & rebuildInterwiki were moved out of core (clear_interwiki_cache.php is still in core). Since they were Wikimedia-specific, it wasn't really useful to generate an interwiki cache for a normal MediaWiki wiki. But it was at least more or less possible. Now it is impossible to generate an interwiki cache. See: https://www.mediawiki.org/wiki/Manual:$wgInterwikiCache & includes/interwiki/Interwiki.php
See https://www.mediawiki.org/wiki/Interwiki_cache#CDB_interwiki_cache for description of clunky workaround (does require grabbing a copy of the extension and some other public files).