General Perl Linking Question

I'm using Perl v5.8.8 on AIX, and I have a question about how Perl
locates libraries (*.a & *.so files) used by it's modules.

I know Perl looks in the following directories for these libraries on my
machine.

> perl -V:libpth
libpth='/lib /usr/lib /usr/ccs/lib /usr/local/lib';

But one of the libraries I need to link to for a module isn't located in
one of these 4 locations & since I don't own the machine, the Unix admin
doesn't want to reinstall the library in one of these locations.

Is there any environment variable that can be set to add that additional
directory? Or am I screwed until I can build a new Perl release that
includes that directory? (Luckily I do own the Perl Install)

Or is there some option I can add to "perl Makefile.PL" that would help
during the build/test/install?

Curtis

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RE: General Perl Linking Question

On Wed, 12 Dec 2007, Curtis Leach wrote:
> I'm using Perl v5.8.8 on AIX, and I have a question about how Perl
> locates libraries (*.a & *.so files) used by it's modules.
>
> I know Perl looks in the following directories for these libraries on
> my machine.
>
> > perl -V:libpth
> libpth='/lib /usr/lib /usr/ccs/lib /usr/local/lib';
>
> But one of the libraries I need to link to for a module isn't located
> in one of these 4 locations & since I don't own the machine, the Unix
> admin doesn't want to reinstall the library in one of these locations.
>
> Is there any environment variable that can be set to add that
> additional directory? Or am I screwed until I can build a new Perl
> release that includes that directory? (Luckily I do own the Perl
> Install)
>
> Or is there some option I can add to "perl Makefile.PL" that would
> help during the build/test/install?

You can add alternate paths with -L/path.

Look at `perldoc ExtUtils::MakeMaker`:

LIBS
An anonymous array of alternative library specifications to be
searched for (in order) until at least one library is found. E.g.

'LIBS' => ["-lgdbm", "-ldbm -lfoo", "-L/path -ldbm.nfs"]

Mind, that any element of the array contains a complete set of
arguments for the ld command. So do not specify

'LIBS' => ["-ltcl", "-ltk", "-lX11"]

See ODBM_File/Makefile.PL for an example, where an array is needed. If
you specify a scalar as in

'LIBS' => "-ltcl -ltk -lX11"

MakeMaker will turn it into an array with one element.

Cheers,
-Jan

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Re: General Perl Linking Question

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You can use "lib" to extend where Perl looks for libraries:

use lib "/path/to/your/lib";

HTH

Paco Zarabozo


----- Original Message -----=20
From: Curtis Leach=20
To: activeperl@activestate.com=20
Sent: Wednesday, December 12, 2007 2:07 PM
Subject: General Perl Linking Question


I'm using Perl v5.8.8 on AIX, and I have a question about how Perl
locates libraries (*.a & *.so files) used by it's modules.

I know Perl looks in the following directories for these libraries on =
my
machine.

> perl -V:libpth
libpth=3D'/lib /usr/lib /usr/ccs/lib /usr/local/lib';

But one of the libraries I need to link to for a module isn't located =
in
one of these 4 locations & since I don't own the machine, the Unix =
admin
doesn't want to reinstall the library in one of these locations.

Is there any environment variable that can be set to add that =
additional
directory? Or am I screwed until I can build a new Perl release that
includes that directory? (Luckily I do own the Perl Install)

Or is there some option I can add to "perl Makefile.PL" that would =
help
during the build/test/install?

Curtis

_______________________________________________
ActivePerl mailing list
ActivePerl@listserv.ActiveState.com
To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs

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