I have used Super Search to find an answer to this, but haven't found the right answer yet:

I have a Perl script that needs to load a module, foo.pm, which in turn uses XSLoader to load libfoo_perl.so. libfoo_perl.so has a reference to bar.so which is not in a standard path. I can not modify the environment variables before running my script. The script looks like this: 

$ENV{PATH} = "/foo/bin:/bar/bin:$ENV{PATH}";
$ENV{LD_LIBRARY_PATH} = "/foo/bin:/bar/bin:$ENV{LD_LIBRARY_PATH}";
$ENV{PERL5LIB} = "/foo/lib:$ENV{PERL5LIB}";

use lib "/foo/lib";
use foo;
# if I comment the above line and 
# uncomment below, it works, but that is not what I want.
# print `perl -e 'use foo; print "success\n";'`;

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The above would give me an error like this: Can't load '/foo/bin/libfoo_perl.so' for module foo_perl: bar.so: cannot open shared object file: No such file or directory at /auto/perl/5.8.3/lib/5.8.3/i686-linux-thread-multi/DynaLoader.pm line 229.

I know the easy solution is to add the directory for bar.so to LD_LIBRARY_PATH, but I can not do that. I am not allowed to touch the environment outside the script. Only inside the script. And no, I can not recompile libfoo_perl.so to hard code the path to bar.so.

It would appear that the dl_load_file() function in DynaLoader does not inherit the current %ENV settings, and instead uses the parent environment settings.

Using Perl 5.8.3, if you haven't guessed already.

Thanks for the help,
Imran

In reply to DynaLoader and LD_LIBRARY_PATH by CountOrlok

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