Thanks LanX
i'm still in the fog..

CPAN Terminal> l Term::ReadLine
..
Version Installed        1.14
Version on CPAN          1.14

CPAN Terminal> l Term::ReadLine::Perl
..
Version Installed        1.0303
Version on CPAN          1.0303

#anyway using Term::ReadLine::Perl directly cause some error:

io@COMP:C>perl -MTerm::ReadLine::Perl -e 0
Can't locate object method "Features" via package "Term::ReadLine::Stu
+b" at C:/ulisse/strawberry/perl/lib/Term/ReadLine
Perl.pm line 101.
Compilation failed in require.
BEGIN failed--compilation aborted.
[download]

Eventually, modifying the code to use the ENV var seems to produce the same results:

#!perl
use strict;
use warnings;
use Term::ReadLine;

BEGIN{$ENV{PERL_RL}="Perl"}
print "\$ENV{PERL_RL} $ENV{PERL_RL}\n";
$ENV{TERM}=undef;

my $term = Term::ReadLine->new('xxx');
print $term->ReadLine;
my %cmds = (a=>1,b=>2);

   # THIS WORKS &readline::rl_basic_commands(keys %cmds);
   # THE FOLLOWING CHECK DOES NOT WORK
   if (exists &readline::rl_basic_commands){print "BEFORE WHILE EXISTS
+\n"; &readline::rl_basic_commands(keys %cmds);}

while ( defined ( $_ = $term->readline( '>') ) ) {
     print "$_\n";
}
continue{
   # THIS CHECK WORKS INDEED!
   if (exists &readline::rl_basic_commands){print "IN CONTINUE EXISTS\
+n"; &readline::rl_basic_commands(keys %cmds);}
}


###OUTPUT
$ENV{PERL_RL} Perl

>
###if you press TAB the current dir content is dumped: this is the def
+ault behaviour if
###you does not provide autocompletion list

###but after, if you press ENTER:
>
Term::ReadLine::Perl
IN CONTINUE EXISTS

>
a b
>
[download]

That said, it seems to be an headache builder. Thanks for the suggestions.

L*