>perl -wMstrict -le
"foreach my $origName (qw(foo bar)) {
   no strict 'refs';
   *{; qq{gen_$origName} } = sub { print qq{generated $origName(@_)} };
   }
 ;;
 gen_foo(1, 2, 3);
 gen_bar(4, 5, 6);
"
generated foo(1 2 3)
generated bar(4 5 6)