Trying to get a better grip on perl module, I was testing out below script,
When I use "use Acme statement", it loads the module properly and it works.
However, when I want to test out the ' use lib ' it comes up with below error message(looks like it is able to locate but cannot read or import back the function for whatever reason??).
[root@myserver perl]# ./logtest2.module.pl
Undefined subroutine &main:pen_log called at ./logtest2.module.pl line 23.
Code:
#!/usr/bin/perl -w
use strict;
#
# Below use Acme works ; just uncomment it
#
#use Acme::Webserver::Logger;
#
# See if you can understand and do use lib
#
use lib '/usr/lib/perl5/site_perl/5.8.8/Acme/Webserver';
require Logger;
#require 'Logger.pl';
#use Logger;
# /usr/lib/perl5/5.8.5/Acme/Webserver
open_log("webserver.log");
write_log(1, "A basic message");
write_log(10, "A debugging message");
log_level(10);
write_log(10, "Another debugging message");
close_log();
I have both Logger.pm and Logger.pl(just in case) in
usr/lib/perl5/site_perl/5.8.8/Acme/Webserver
I am not sure about Perl 4, but considering Perl 5 was officially released more than 13 years ago, I see no reason to consider it anymore because many Perl 4 practices have been deprecated and pursuing them you are just asking for trouble.
Normally "require" should work. I'm not sure why you said it didn't work for you. The major difference between "require" and "use" is that "require" is a runtime instruction, while "use" is a compile-time instruction, so it is executed before the rest of the program. So, you will need to use "use lib" early in the program to adjust the @INC at compile time.
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Regards,
Rahul (2 Replies)
07-07-2007
pen_log called at ./logtest2.module.pl line 23.