1) don't do that, 2) don't do that 3) Read Tutorials: Variable Scoping in Perl: the basics, Coping with Scoping 4) Read Re: Recommendation for dynamically "using" modules (export import into) 5) Read PERL5LIB, PERL5OPT , Re^2: How do I tell CPAN to use a local lib? (perllib/perl5lib/perl5opt/-Idirectory/-Mblib/sitecustomize.pl ) 6) File::FindLib,FindBin, %ENV

$ perl -E " $foo = 1; my $bar = 2; BEGIN{ say -WHAT,$foo,$bar; } say $
+foo,$bar; "
-WHAT
12

$ perl -wE " $foo = 1; my $bar = 2; BEGIN{ say -WHAT,$foo,$bar; } say 
+$foo,$bar; "
Use of uninitialized value $foo in say at -e line 1.
Use of uninitialized value $bar in say at -e line 1.
-WHAT
12

$ perl -wE " my $bar; BEGIN{$foo = 1; $bar = 2;} BEGIN{ say -WHAT,$foo
+,$bar; } say $foo,$bar; "
-WHAT12
12
[download]

use happens at BEGIN time, lexicals(my variables) have no value at BEGIN time, lexicals(my) get initialized after BEGIN

But like I said, don't do that

Thanks for the resources and links. I will take a look at them and see if I can make it work. Regards, Siddharth

Thanks for your response but I want to use the path in a string variable. my $path = "/abc/xyz/bcd" use lib $path; it throws me the following error Empty compile time value given to use lib at CWD/filename.pm Thanks, Sid

Try use lib hardcoded_path_name;. The use directives are executed at compile time, before the variables used in the code are set.

Else you could set your variable in a BEGIN block, just prior to using it.

I cannot use a hardcoded path, it is a varying path based on the user. $path = user's cwd/somepath/filename.pm Regards, Siddharth

use lib './somepath/';
[download]

or

BEGIN {
  my $path = 'somepath';
  push @INC, $path;
}
[download]

or why not just let the user set his/her PERL5LIB environment variable?

unshift @INC, $path;
[download]

So I can do a require in place of use and it should work correct? Regards, Siddharth

Yes, that will work. But remember that require is not the same as use: the import sub will not be called

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

My blog: Imperial Deltronics

• Show the code above your lib line.
• Show your exact error message in "code" tags.

 Empty compile time value given to use lib at /proj/zn_ver_user2/sidsh
+a/build_plugin/infra/lib/BuildPlugin.pm line 32.
Use of uninitialized value in require at /proj/zn_ver_user2/sidsha/bui
+ld_plugin/infra/lib/BuildPlugin.pm line 33.
Use of uninitialized value in require at /proj/zn_ver_user2/sidsha/bui
+ld_plugin/infra/lib/BuildPlugin.pm line 33.
Can't locate BuildPluginInc.pm in @INC (@INC contains:  /proj/zn_ver_u
+ser2/sidsha/build_plugin/import/rndcfg/lib /proj/zn_ver_user2/sidsha/
+build_plugin/verif/lib /proj/zn_ver_user2/sidsha/build_plugin/infra/c
+onfig /proj/zn_ver_user2/sidsha/build_plugin/infra/lib /proj/verif_re
+lease_ro/vv/60/lib /proj/verif_release_ro/RegrPlatform/17/lib/perl /p
+roj/verif_release_ro/ubts_access/56/lib/perl /proj/verif_release_ro/S
+igSync/313/lib/perl /proj/verif_release_ro/s_trapbug/32/lib/perl /pro
+j/verif_release_ro/psm/22/tb /proj/verif_release_ro/dsm/43/tb /proj/v
+erif_release_ro/dfxcfg/3/lib/perl /proj/verif_release_ro/sql_utils/56
+/lib/perl/DBInsert /proj/verif_release_ro/sql_utils/56/lib/perl /proj
+/verif_release_ro/kx_core/1678/lib/perl /proj/verif_release_ro/kx_too
+ls/18/lib/perl /proj/verif_release_ro/patterndb/89/lib/perl /proj/ver
+if_release_ro/DatabaseKeywords/131/lib/perl /proj/verif_release_ro/cx
+shell/38/lib /proj/verif_release_ro/verif_modules/53/lib/perl /proj/v
+erif_release_ro/bt/project_tools/242/lib/perl /proj/verif_release_ro/
+utils/63/lib/perl /proj/verif_release_ro/siteconfig/current/lib/perl 
+/proj/verif_release_ro/version_control/14/lib/perl /proj/verif_releas
+e_ro/software_stack/12/lib/perl /proj/verif_release_ro/regr_support/2
+9/lib/perl /proj/verif_release_ro/regr_stack/65/lib/perl /proj/verif_
+release_ro/regr_load_balancer/40/lib/perl /proj/verif_release_ro/regr
+_db_interface/102/lib/perl /proj/verif_release_ro/regr_config/109/lib
+/perl /proj/verif_release_ro/regr_cluster_interface/34/lib/perl /proj
+/verif_release_ro/crdb_api/117/lib/perl /proj/verif_release_ro/crdb20
+_db_interface/30/lib/perl /proj/verif_release_ro/crdb_db_interface/10
+5/lib/perl /proj/verif_release_ro/results_analysis/141/lib/perl /proj
+/verif_release_ro/job_specification/195/lib/perl /proj/verif_release_
+ro/dispatch/266/lib/perl /proj/verif_release_ro/flow_managers/106/lib
+/perl /proj/verif_release_ro/fm_verif_plugins/343/lib/perl /proj/veri
+f_release_ro/autosmoke/89/lib /proj/zn_ver_user2/sidsha/build_plugin/
+out/linux_2.6.18_64.VCS/common/pub/lib/perl /proj/zn_ver_user2/sidsha
+/build_plugin/out/linux_2.6.18_64.VCS/common/pub/bin /proj/verif_rele
+ase_ro/rgb_build/196 /proj/verif_release_ro/rgb/70 /proj/verif_releas
+e_ro/rgb/70/aleLexer/blib/lib /proj/verif_release_ro/leda_rules/2013.
+Q2p1_2013.03-03/lib /proj/verif_release_ro/drop2cad/94/lib/perl /proj
+/verif_release_ro/compression_utils/19/lib/perl /proj/verif_release_r
+o/ustat_send/27/lib/perl /proj/verif_release_ro/project_config/25/lib
+/perl /proj/verif_release_ro/p4w/223 /proj/verif_release_ro/cbwa/218/
+lib/perl /proj/verif_release_ro/xml_utils/47/lib/perl /proj/verif_rel
+ease_ro/p4_mkwa/current /proj/verif_release_ro/error_reporting/25/lib
+/perl /proj/verif_release_ro/cbwa_bootcore/current/lib/perl /tool/pan
+dora64/.package/perl-5.8.8/lib/5.8.8/x86_64-linux-thread-multi /tool/
+pandora64/.package/perl-5.8.8/lib/5.8.8 /tool/pandora64/.package/perl
+-5.8.8/lib/site_perl/5.8.8/x86_64-linux-thread-multi /tool/pandora64/
+.package/perl-5.8.8/lib/site_perl/5.8.8 /tool/pandora64/.package/perl
+-5.8.8/lib/site_perl .) at /proj/zn_ver_user2/sidsha/build_plugin/inf
+ra/lib/BuildPlugin.pm line 33.
BEGIN failed--compilation aborted at /proj/zn_ver_user2/sidsha/build_p
+lugin/infra/lib/BuildPlugin.pm line 33.
Compilation failed in require at /proj/verif_release_ro/rgb_build/196/
+build line 8.
BEGIN failed--compilation aborted at /proj/verif_release_ro/rgb_build/
+196/build line 8.
[download]

If you run that through splain you'll get

 Empty compile time value given to use lib at /proj/zn_ver_user2/sidsh
+a/build_plugin/infra/lib/BuildPlugin.pm line 32.
Use of uninitialized value in require at
        /proj/zn_ver_user2/sidsha/build_plugin/infra/lib/BuildPlugin.p
+m line 33 (#1)
    (W uninitialized) An undefined value was used as if it were alread
+y
    defined.  It was interpreted as a "" or a 0, but maybe it was a mi
+stake.
    To suppress this warning assign a defined value to your variables.

    To help you figure out what was undefined, perl will try to tell y
+ou
    the name of the variable (if any) that was undefined.  In some cas
+es
    it cannot do this, so it also tells you what operation you used th
+e
    undefined value in.  Note, however, that perl optimizes your progr
+am
    anid the operation displayed in the warning may not necessarily ap
+pear
    literally in your program.  For example, "that $foo" is usually
    optimized into "that " . $foo, and the warning will refer to the
    concatenation (.) operator, even though there is no . in
    your program.
[download]

I explain /demonstrate why its uninitialized in Re: ADD directory to @INC using a string variable (not when variables initialized use BEGIN)

But I really just wanted to respond to say eew at your 60-entries of @INC, because whatever your reasons, 60-deep-@inc is eew :)

Assuming you are on some form of Un*x, can you use something like this:

BTW, the argument after lib should be a path.

can I use a string variable instead ?? something like use lib $path Regards, Siddharth