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Asked: 2026-05-15T00:57:11+00:00

I’m having trouble understanding how to export a package symbol to a namespace. I’ve

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I’m having trouble understanding how to export a package symbol to a namespace. I’ve followed the documentation almost identically, but it seems to not know about any of the exporting symbols.

mod.pm

#!/usr/bin/perl

package mod;

use strict;
use warnings;

require Exporter;

@ISA = qw(Exporter);
@EXPORT=qw($a);


our $a=(1);

1;

test.pl

$ cat test.pl
#!/usr/bin/perl

use mod;

print($a);

This is the result of running it

$ ./test.pl
Global symbol "@ISA" requires explicit package name at mod.pm line 10.
Global symbol "@EXPORT" requires explicit package name at mod.pm line 11.
Compilation failed in require at ./test.pl line 3.
BEGIN failed--compilation aborted at ./test.pl line 3.

$ perl -version
This is perl, v5.8.4 built for sun4-solaris-64int
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1 Answer

  1. Editorial Team

    It’s not telling you that you’re having a problem exporting $a. It’s telling you that you’re having a problem declaring @ISA and @EXPORT. @ISA and @EXPORT are package variables and under strict, they need to be declared with the our keyword (or imported from other modules–but that is not likely with those two). They are semantically different–but not functionally different–from $a.

    Nanny NOTE: @EXPORT is not considered polite. Through Exporter it dumps its symbols in the using package. Chances are if you think something is good to export–and it is–then it will be worth it for the user to request it. Use @EXPORT_OK instead.

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