#! /usr/bin/perl -I.
use strict;
use warnings;
use 5.010.000;

use File::Basename qw( basename );


my @dispatch = (
  {
    file        => 'x5_1.pl',
    subroutine  => 'foo',          # string here, not coderef
  },
  {
    file        => 'x5_2.pl',
    subroutine  => 'foo',          # string here, not coderef
  },
);

sub foo {
  say "wrong sub";
}

for my $ref ( @dispatch ) {
  # clean up file name for usage as namespace name (remove file path and extension and convert '-' to '_')
  ( my $namespace = basename( $ref->{file}, '.pl' ) ) =~ tr/-/_/;

  eval <<"EVAL_CODE";
package $namespace;                     # declare package to contain imported functions
require "$ref->{file}";                 # "import" function(s)
$ref->{subroutine}('a');                # call function with string-eval; remember to insert error handling
                                        # We are inside package MyModule, so no need for package name in string
EVAL_CODE
        warn "$@\n"     if $@; 
}

say "At the end:";                 # just a check what happens now with main::foo
foo( 'b' );