For starters, don't use 'b' for a module name. In Windows, it conflicts with the B:: hierarchy.

Wrap the sub import in a BEGIN and move it above the use, as shown below. You're suffering the same problem as Undefined subroutine errors.

##### aa.pm #####
package aa;

sub import {
   print "import in $_[0] called from ". (caller(1))[3] ." \n";
}

use bb;

# ...

1;


##### bb.pm #####
package bb;

sub import {
   print "import in $_[0] called from ". (caller(1))[3] ." \n";
}

use aa;

# ...

1;


#################
>perl -e "use aa; use bb;"
import in aa called from bb::BEGIN
import in bb called from aa::BEGIN
import in aa called from main::BEGIN
import in bb called from main::BEGIN

[download]

Circular inclusions are almost always caused by bad design. The above is simply a workaround.

Update: It turns out the BEGIN is not necessary, but the use must follow sub import.

In reply to Re: Circular use doesn't call import() as expected...? by ikegami
in thread Circular use doesn't call import() as expected...? by asokoloski

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.