- #### For unknown reasons, the parameter values checks fail on the
- #### FreeBSD10 buildbot. It doesn't support EBCDIC-US, which is used
- #### by the checks, so check for that. Though that doesn't seem to be
- #### the reason.
- printf '\344' | iconv -f EBCDIC-US -t UTF-8 >/dev/null 2>&1 ||
- skip_param_value_checks=1
+ #### The GNU iconv library normalises charset names by eliding '?', along
+ #### with some other characters. The iconv libraries used on FreeBSD/NetBSD
+ #### and Mac OS X don't.
+ printf x | iconv -f '?UTF-8' -t UTF-8 >/dev/null 2>&1 &&
+ iconv_elides_question_marks=1