Q. jperl で 
   perl: warning: Setting locale failed.
   perl: warning: Please check that your locale setting:
   	LC_ALL = (unset),
   	LANG = "ja_JP.EUC"
        are supported and installed on your system.
   perl: warning: Falling back to the standard locale("C").
   と言われます。
A. 環境変数に PERL_BADLANG=0 を設定してください。
   例:csh 系(tcsh等)	setenv PERL_BADLANG 0
       bsh 系(sh, bash等)	export PERL_BADLANG=0