----- Original Message -----
From: "David Oswald" <daosw...@gmail.com>
To: "McIntyre, Shane K." <smcint...@mitre.org>; "inline" <inline@perl.org>
Sent: Friday, July 13, 2012 4:16 AM
Subject: Re: Inline CPP Question/Issue
On Thu, Jul 12, 2012 at 11:03 AM, McIntyre, Shane K.
<smcint...@mitre.org> wrote:
I am writing a Perl module (.pm file) that has C++ code in it. When I
attempt to start up apache and the Perl modules get compiled the C++
method
in the file does not get bound to Perl.
That generally means that everything has compiled ok - it's just that
there's a problem in the perl bindings.
I am not having the same issue with
other Perl Modules where I use Inline C only ones where I have Inline
CPP.
I am using Perl version 5.8.8. Is there something different that needs
to
be done for C++ vs. C?
Not really, but are you using current versions of Inline::C and Inline::CPP
?
Right now I have a very basic Perl Module that I’m
just trying to get to work. The code is below. Any help/guidance you
could
give me would be appreciated.
use strict;
use Inline CPP => (‘Config’ =>
DIRECTORY =>
‘/projects/langid/apache/_Inline’,
);
use Inline CPP => <<’END_CPP’;
double factorial (int x) {
int i;
double result = 1;
for (i=2; i<=x; i++) result *=I;
return result;
}
END_CPP
1;
There's a typo in the code - '*=I' should be '*=i'.
But that shouldn't cause the error you're getting.
I *think* 5.8.8 should know how to return a double but just in case it
doesn't, try this version of the function:
SV * factorial (int x) {
int i;
double result = 1;
for (i=2; i<=x; i++) result *=i;
return newSVnv(result);
}
If that works, but reverting to 'double' fails, then it's just that your
perl typemap doesn't provide the necessary information on how to return a
double.
In that case, the typemap could be fixed - but it's probably easier (and
certainly no less efficient) to use the function as I have written it. Or
update to a later version of perl.
Cheers,
Rob
