An Inline question, and a user's experience: Fwd: Using Inline::CPP and Math::Primes::FastSieve

Today I received the following email message relating to Inline::CPP,
Math::Prime::FastSieve, and Inline.  I thought I would forward part of
it to the list to see if we can come up with a solution for some of
Dana's experiences:


---------- Forwarded message ----------
From: Dana Jacobsen <[email protected]>
Date: Thu, May 17, 2012 at 12:24 PM
Subject: Using Inline::CPP and Math::Primes::FastSieve
To: [email protected]


David,

 I started looking into prime generators after I added the Goldbach
codes to my variable length coding module.  I thought I'd send you a
message since you've been working on Math::Primes::FastSieve (MPFS)
this month.

 One of my machines is running Ubuntu 11 32-bit.  When I try to
install Inline::CPP I get:

t/01fn_cans.t ....... ok
Had problems bootstrapping Inline module '_02basic_t_bc90'

Can't load '/home/dana/.cpan/build/Inline-CPP-0.39-ftYEEF/_Inline/lib/auto/_02basic_t_bc90/_02basic_t_bc90.so'
for module _02basic_t_bc90:
/home/dana/.cpan/build/Inline-CPP-0.39-ftYEEF/_Inline/lib/auto/_02basic_t_bc90/_02basic_t_bc90.so:
undefined symbol: _ZNSt8ios_base4InitD1Ev at
/home/dana/localperl/lib/5.14.2/i686-linux-64int/DynaLoader.pm line
190.
 at /home/dana/localperl/lib/site_perl/5.14.2/Inline.pm line 536


 at t/02basic.t line 34
BEGIN failed--compilation aborted at t/02basic.t line 92.


I've tried giving it direction to other stdc libraries including the
static linked version, but so far with no success.  Since I can't get
Inline::CPP working, I can't use MPFS on that machine.


Another machine I'm using runs Fedora 16, and installs Inline::CPP and
MPFS just fine.

<snip> --------------------------------------------

Ok, so this is a familiar install issue for Inline::CPP, but I still
haven't gotten my hands on a failure case that I can attempt to debug.
 I've asked Dana if there are any suggestions on how I might configure
an Ubuntu install (within a VM) so that I can replicate the failure
and try to debug it.

Dana then went on to show some benchmarks showing M::P::FS to be the
fastest primes generator among the samples chosen (including an XS
alternative on CPAN).

Then Dana's message presents another problem, here:

----------------------------------------------------<message follows>

However .... when I do:

 if (eval { require Math::Prime::FastSieve; 1;}) {
    # ... use MPFS
 } elsif (eval { require Math::Prime::XS;
Math::Prime::XS->import(qw(primes is_prime)); 1; }) {
    # ... use MPXS
 } elsif (....) {
    # ... use DBXS
 } else {
    # pure perl
 }

I get the Inline M51 warning (DATA section not used) if anyone does a
require on my module.  I realize this is a harmless warning, but I
really don't want it happening to my module when I don't even use
Inline.  So for now I've disabled use of MPFS to avoid it.

<snip>------------------------------------------------

That message is coming from Inline, but I can't figure out how one
might squelch it.  Are there any suggestions that might help here?


Dave

-- 

David Oswald
[email protected]


(This message is being sent to [email protected], and CC'ed back to Dana
Jacobsen <[email protected]>.)