in reply to Re: How to detect X?in thread How to detect X?
perl -MTk -we "print tkinit->server" [download]
In my opinion Tcl::Tk is more Tk than Tk, because first one refers to most recent and up-to-date one.
addition: as long as Tcl::Tk many compatible with Tk, and based on your post, here are two other ways which indeed work:
perl -MTcl::Tk -we "print Tcl::Tk::tkinit->server" [download]
perl -MTcl::Tk=:perlTk -we "print tkinit->server" [download]