soundlord has asked for the wisdom of the Perl Monks concerning the following question:

Greetings !!

C application using Perl functions

I did correctly stuff to call a perl function in a C application that was a lot of fun ^^

This application is about to send mails to customers with a snapshot (an image) with a watermark on it
giving the code they would use to access the party they have paid for...
I tried in full C but sending mail with attachment is a real nightmare,
so I decided to keep the application and call Perl functions using well done
modules efficient for mail composing and attachment handling.
The problem is that for the DBI module I got no particular problem to have it xsinit'd (simply linking the DBI.so library)
BUT concerning the Net::SMTP module, I'm stucked, the compiler (gcc 4.8.3 rev 212064) told me that there is no reference to what is behind
boot_SMTP regarding the xs_init code...

newXS("DBI::bootstrap", boot_DBI, file);
newXS("SMTP::bootstrap", boot_SMTP, file);
[download]

I tried to locate the .so file without success, all I have are the .pm files that the C language
seems not to handle as the Perl does :{
For now my perl source looks like this:

#! /usr/bin/perl

use Net::SMTP;
use DBI;

sub sendmail()
{
    
    my $this_function = (caller(0))[3];
    print "[PERL -- $this_function]\n";
    
}
[download]

The application works without the Net::STMP reference at the use keyword. Can someone could give me a way to solve this ridiculous compilation error ?

Comment on [Linux][Perl 5.20.1] embedded perl in C application Select or Download Code

Replies are listed 'Best First'.
Re: [Linux][Perl 5.20.1] embedded perl in C application by Corion (Patriarch) on Mar 31, 2018 at 17:03 UTC
I don't think you need to `bootstrap` Net::SMTP at all, because the `bootstrap()` function is only for XS code. At least that is what I get from DynaLoader. I think your program should be able to compile, at least if there is `Net/SMTP.pm` somewhere on the disk or you put a callback into `@INC` to supply the source code.	[reply] [d/l] [select]
Re^2: [Linux][Perl 5.20.1] embedded perl in C application by soundlord (Novice) on Apr 02, 2018 at 00:31 UTC
You are right, I don't need to specify Net::STMP in the list at "-e xsinit -- -o xsinit.c -std"... I'm not confident with these techniques, I would try to find some documentation and books... the term "XS code" is completly unknown for me, and I have to dig deeper concerning the "dynamic loading" in Perl... Thank you for your help ^^	[reply]
Re^3: [Linux][Perl 5.20.1] embedded perl in C application by hippo (Archbishop) on Apr 02, 2018 at 11:50 UTC
See perlxs in perldoc for some (lots of) info.	[reply]
Re: [Linux][Perl 5.20.1] embedded perl in C application by soundlord (Novice) on Mar 31, 2018 at 16:31 UTC
*ADDED* gcc `mysql_config --cflags` -I/usr/lib/perl5/5.20.1/x86_64-linux-thread-multi -I/usr/lib/perl5/5.20.1/x86_64-linux-thread-multi/CORE -Doff64_t=__off64_t `perl -MExtUtils::Embed -e ccopts -e ldopts` `perl -MExtUtils::Embed -e xsinit -- -o xsinit.c -std DBI` -o ...(lot of stuff)... /usr/lib/perl5/5.20.1/x86_64-linux-thread-multi/CORE/libperl.so /usr/lib/perl5/vendor_perl/5.20.1/x86_64-linux-thread-multi/auto/DBI/D +BI.so `mysql_config --libs` -lperl -L/usr/lib/perl5/5.20.1/x86_64-linux-thread-multi/CORE -L/usr/lib/perl5/5.20.1/x86_64-linux-thread-multi [download]	[reply] [d/l]