I think the code should be pretty self explanitory:

In MyPackage.pm:

package MyPackage;
use base qw( Exporter );
@EXPORT = qw( foo );

# create subroutines and export them
BEGIN{
  for my $sub_name ( qw( bar baz ) ){
    *$sub_name = sub { print $sub_name };
    push @EXPORT, $sub_name;
  }
}

# define a static subroutine for comparison
sub foo { print 'foo' }

1;
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In export.pl:

#!perl

use lib '.';
use MyPackage;

foo();            # prints 'foo'
MyPackage::bar(); # prints 'bar'
bar(); # Generates compile-time warning: 
       # Undefined subroutine &main::bar called at export.pl line 7.
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It makes sense to me that this is a problem, as the export must happening before my BEGIN block code is running. So how can I get those subroutines exported? This isn't an XY problem -- I'm working with existing code that I don't have control over that is requiring me to export my functions and I either need to hand code a bunch (hundreds) or get this to work.

Update: Just noticed that using $_ in MyPackage was causing problems. Just updated to declare a lexical.

perl -e 'split//,q{john hurl, pest caretaker}and(map{print @_[$_]}(joi
+n(q{},map{sprintf(qq{%010u},$_)}(2**2*307*4993,5*101*641*5261,7*59*79
+*36997,13*17*71*45131,3**2*67*89*167*181))=~/\d{2}/g));'
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