It works fine from my tests without the BEGIN block since $sub is initialized before the compiler will get to GlobalRoutine.

Then I guess you missed my addition last time. Here: 

#!/usr/bin/perl -w
use strict;

exit main( @ARGV );

{
    my $sub;
    ## BEGIN {
        $sub= sub {
            warn "Called local sub: @_\n";
        };
    ## }
    sub GlobalRoutine {
        &$sub( "Test" );
    }
}

sub main {
    GlobalRoutine("hi");
    return 0;
}
__END__
This produces the following:
Use of uninitialized value in subroutine entry at localsub.pl line 14.
Can't use string ("") as a subroutine ref while "strict refs" in use a
+t localsub.pl line 14.

[download]
        - tye (but my friends call me "Tye")

In reply to (tye)Re3: Functions by tye
in thread Functions by fgcr

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.