Re: AC_PROG_PERL (macro, docs, used in configure.in)

[Akim Demaille]

| +    if ($ac_prog -e 'printf "found version %g\n",$[@:>@];' ifelse([$1],,,
| 
| Quotation of the quadrigraph is overkill here, but not wrong.
| Globally, that's one place that would enjoy using AC_TRY_COMMAND or
| so.  Can be done later, just thinking aloud.

Bwahaha.  Sure it's not needed to protect the quadrigraph per se, but
it's, err, somewhat useful to help M4 understand $@ is not what it
thinks it is :)