Diego, bug #125887 contains all the information you've asked for in bug #134454, including a detailed explanation of why it fails and the autoconf variables that cause the failure. This bug affects at least wget and ntp and has had the culprit identified and a fix offered for over two months. Please read bugs before closing them in the future.
restricted.
RESTRICT=confcache is not acceptable
this needs to be root caused, not ignored
all versions have to be restricted, not just the most current. re: root cause, coreutils sucks, pure and simple (blame their reimplementation of AC_CHECK_FUNCS functionality for caching values incorrectly).
I'm closing them as UPSTREAM as for now I can't do much until Brian provides me a new version of confcache that allows to trace who poisoned the cache. This is also the main reason why confcache is masked right now.