Sure 
use MyJunk;

[download]
package MyJunk;
if( $] > 5.008008 ){
    require MyJunk::threads;
} else {
    require MyJunk::nothreads;
}

[download]

In reply to Re: How to Optionally enable threads in Perl 5.10.0 by Anonymous Monk
in thread How to Optionally enable threads in Perl 5.10.0 by DrWhy

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