I have a snippet like this 

 
BEGIN {
    require "call_simulator.pm" ;

    use constant {
        START           => 1000 ,
        NO_OF_CALLS     => 1 ,
        DEBUG           => 1 ,
        DET_DEBUG       => 1 ,
        TOTAL_TIME      => 1 ,
        DETAILED_TIME   => 1 ,
        RESPONSE        => 1 ,
        SLEEP           => undef ,
        MICRO_SEC       => 1 ,
    };

    # This works well 
    if ( MICRO_SEC ) {
        eval "use Time::HiRes qw (time )" ;

    }
    # This works
    # use if ( MICRO_SEC ) , "Time::HiRes" ;

    # This won't work  
    # use if ( MICRO_SEC ) , "Time::HiRes qw(time)" ;
    # ERROR : 
   # Can't locate Time/HiRes qw(time).pm in @INC (@INC contains: /etc/
+perl /usr/local/lib/perl/5.10.0 /usr/local/share/perl/5.10.0 /usr/lib
+/perl5 /usr/share/perl5 /usr/lib/perl/5.10 /usr/share/perl/5.10 /usr/
+local/lib/site_perl .) at /usr/share/perl/5.10/if.pm line 13.


}

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I just wanted to include the Time::HiRes module with a time
function at a compile time with a condition
Using eval statement its possible !
but my question is how can I achieve this with the "use if" to include a module with a function !

In reply to Include module at compile time with condition by abubacker

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