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package Alien::Build::Plugin::Probe::CBuilder;
use strict;
use warnings;
use 5.008004;
use Alien::Build::Plugin;
use File::chdir;
use File::Temp ();
use Capture::Tiny qw( capture_merged capture );
use Alien::Util qw( version_cmp );
# ABSTRACT: Probe for system libraries by guessing with ExtUtils::CBuilder
our $VERSION = '2.74'; # VERSION
has options => sub { {} };
has cflags => '';
has libs => '';
has program => 'int main(int argc, char *argv[]) { return 0; }';
has version => undef;
has 'atleast_version' => undef;
has aliens => [];
has lang => 'C';
sub init
{
my($self, $meta) = @_;
$meta->add_requires('configure' => 'ExtUtils::CBuilder' => 0 );
if(@{ $self->aliens })
{
die "You can't specify both 'aliens' and either 'cflags' or 'libs' for the Probe::CBuilder plugin" if $self->cflags || $self->libs;
$meta->add_requires('configure' => $_ => 0 ) for @{ $self->aliens };
$meta->add_requires('Alien::Build::Plugin::Probe::CBuilder' => '0.53');
my $cflags = '';
my $libs = '';
foreach my $alien (@{ $self->aliens })
{
my $pm = "$alien.pm";
$pm =~ s/::/\//g;
require $pm;
$cflags .= $alien->cflags . ' ';
$libs .= $alien->libs . ' ';
}
$self->cflags($cflags);
$self->libs($libs);
}
my @cpp;
if($self->lang ne 'C')
{
$meta->add_requires('Alien::Build::Plugin::Probe::CBuilder' => '0.53');
@cpp = ('C++' => 1) if $self->lang eq 'C++';
}
$meta->register_hook(
probe => sub {
my($build) = @_;
$build->hook_prop->{probe_class} = __PACKAGE__;
$build->hook_prop->{probe_instance_id} = $self->instance_id;
local $CWD = File::Temp::tempdir( CLEANUP => 1, DIR => $CWD );
open my $fh, '>', 'mytest.c';
print $fh $self->program;
close $fh;
$build->log("trying: cflags=@{[ $self->cflags ]} libs=@{[ $self->libs ]}");
my $cb = ExtUtils::CBuilder->new(%{ $self->options });
my($out1, $obj) = capture_merged { eval {
$cb->compile(
source => 'mytest.c',
extra_compiler_flags => $self->cflags,
@cpp,
);
} };
if(my $error = $@)
{
$build->log("compile failed: $error");
$build->log("compile failed: $out1");
die $error;
}
my($out2, $exe) = capture_merged { eval {
$cb->link_executable(
objects => [$obj],
extra_linker_flags => $self->libs,
);
} };
if(my $error = $@)
{
$build->log("link failed: $error");
$build->log("link failed: $out2");
die $error;
}
my($out, $err, $ret) = capture { system($^O eq 'MSWin32' ? $exe : "./$exe") };
die "execute failed" if $ret;
my $cflags = $self->cflags;
my $libs = $self->libs;
$cflags =~ s{\s*$}{ };
$libs =~ s{\s*$}{ };
$build->install_prop->{plugin_probe_cbuilder_gather}->{$self->instance_id} = {
cflags => $cflags,
libs => $libs,
};
if(defined $self->version)
{
my($version) = $out =~ $self->version;
if (defined $self->atleast_version)
{
if(version_cmp ($version, $self->atleast_version) < 0)
{
die "CBuilder probe found version $version, but at least @{[ $self->atleast_version ]} is required.";
}
}
$build->hook_prop->{version} = $version;
$build->install_prop->{plugin_probe_cbuilder_gather}->{$self->instance_id}->{version} = $version;
}
'system';
}
);
$meta->register_hook(
gather_system => sub {
my($build) = @_;
return if $build->hook_prop->{name} eq 'gather_system'
&& ($build->install_prop->{system_probe_instance_id} || '') ne $self->instance_id;
if(my $p = $build->install_prop->{plugin_probe_cbuilder_gather}->{$self->instance_id})
{
$build->runtime_prop->{$_} = $p->{$_} for keys %$p;
}
},
);
}
1;
__END__
=pod
=encoding UTF-8
=head1 NAME
Alien::Build::Plugin::Probe::CBuilder - Probe for system libraries by guessing with ExtUtils::CBuilder
=head1 VERSION
version 2.74
=head1 SYNOPSIS
use alienfile;
plugin 'Probe::CBuilder' => (
cflags => '-I/opt/libfoo/include',
libs => '-L/opt/libfoo/lib -lfoo',
);
alternately:
ues alienfile;
plugin 'Probe::CBuilder' => (
aliens => [ 'Alien::libfoo', 'Alien::libbar' ],
);
=head1 DESCRIPTION
This plugin probes for compiler and linker flags using L<ExtUtils::CBuilder>. This is a useful
alternative to L<Alien::Build::Plugin::PkgConfig::Negotiate> for packages that do not provide
a pkg-config C<.pc> file, or for when those C<.pc> files may not be available. (For example,
on FreeBSD, C<libarchive> is a core part of the operating system, but doesn't include a C<.pc>
file which is usually provided when you install the C<libarchive> package on Linux).
=head1 PROPERTIES
=head2 options
Any extra options that you want to have passed into the constructor to L<ExtUtils::CBuilder>.
=head2 cflags
The compiler flags.
=head2 libs
The linker flags
=head2 program
The program to use in the test.
=head2 version
This is a regular expression to parse the version out of the output from the
test program.
=head2 atleast_version
The minimum required version as provided by the system.
=head2 aliens
List of aliens to query fro compiler and linker flags.
=head2 lang
The programming language to use. One of either C<C> or C<C++>.
=head1 SEE ALSO
L<Alien::Build>, L<alienfile>, L<Alien::Build::MM>, L<Alien>
=head1 AUTHOR
Author: Graham Ollis E<lt>plicease@cpan.orgE<gt>
Contributors:
Diab Jerius (DJERIUS)
Roy Storey (KIWIROY)
Ilya Pavlov
David Mertens (run4flat)
Mark Nunberg (mordy, mnunberg)
Christian Walde (Mithaldu)
Brian Wightman (MidLifeXis)
Zaki Mughal (zmughal)
mohawk (mohawk2, ETJ)
Vikas N Kumar (vikasnkumar)
Flavio Poletti (polettix)
Salvador Fandiño (salva)
Gianni Ceccarelli (dakkar)
Pavel Shaydo (zwon, trinitum)
Kang-min Liu (劉康民, gugod)
Nicholas Shipp (nshp)
Juan Julián Merelo Guervós (JJ)
Joel Berger (JBERGER)
Petr Písař (ppisar)
Lance Wicks (LANCEW)
Ahmad Fatoum (a3f, ATHREEF)
José Joaquín Atria (JJATRIA)
Duke Leto (LETO)
Shoichi Kaji (SKAJI)
Shawn Laffan (SLAFFAN)
Paul Evans (leonerd, PEVANS)
Håkon Hægland (hakonhagland, HAKONH)
nick nauwelaerts (INPHOBIA)
Florian Weimer
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2011-2022 by Graham Ollis.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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