/usr/share/perl5/FCM/System/Make/Build/Task/Link.pm is in fcm 2016.12.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# (C) British Crown Copyright 2006-16 Met Office.
#
# This file is part of FCM, tools for managing and building source code.
#
# FCM is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# FCM is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with FCM. If not, see <http://www.gnu.org/licenses/>.
# ------------------------------------------------------------------------------
use strict;
use warnings;
# ------------------------------------------------------------------------------
package FCM::System::Make::Build::Task::Link;
use base qw{FCM::Class::CODE};
use FCM::Context::Event;
use FCM::System::Exception;
use FCM::System::Make::Build::Task::Archive;
use FCM::System::Make::Build::Task::Share qw{_props_to_opts};
use File::Basename qw{basename};
use File::Path qw{mkpath rmtree};
use File::Spec::Functions qw{abs2rel catfile};
use File::Temp qw{tempdir};
use List::Util qw{first};
use Text::ParseWords qw{shellwords};
my $E = 'FCM::System::Exception';
our %PROP_OF = (
%FCM::System::Make::Build::Task::Archive::PROP_OF,
'ld' => '',
'keep-lib-o' => '',
);
__PACKAGE__->class(
{name => '$', prop_of => '%', util => '&'},
{action_of => {main => \&_main, prop_of => sub {$_[0]->{prop_of}}}},
);
sub _main {
my ($attrib_ref, $target) = @_;
my $NAME = $attrib_ref->{name};
my $P = sub {$target->get_prop_of($_[0])};
# Selects the correct dependent objects
my @paths = @{$target->get_info_of('paths')};
my %dep_keys_of = %{$target->get_info_of('deps')};
my %paths_of = (o => [], 'o.special' => []);
my $abs2rel_func
= sub {index($_[0], $paths[0]) == 0 ? abs2rel($_[0], $paths[0]) : $_[0]};
while (my ($type, $key_list_ref) = each(%dep_keys_of)) {
for my $key (@{$key_list_ref}) {
my $path = first {-e} map {catfile($_, 'o', $key)} @paths;
if ($path) {
push(@{$paths_of{$type}}, $abs2rel_func->($path));
}
}
}
my $path_of_main_o = shift(@{$paths_of{o}});
my $keep_lib_o = $P->('keep-lib-o');
my $lib_o_dir;
if ($keep_lib_o) {
$lib_o_dir = $target->CT_LIB;
mkpath($lib_o_dir);
}
else {
$lib_o_dir = tempdir(CLEANUP => 1);
}
my ($extension, $root)
= $attrib_ref->{util}->file_ext(basename($target->get_key()));
my $lib_o = catfile($lib_o_dir, "lib$root.a");
my %opt_of = (
o => $P->($NAME . '.flag-output'),
L => $P->($NAME . '.flag-lib-path'),
l => $P->($NAME . '.flag-lib'),
);
for my $command_list_ref (
# Archive (when linking multiple objects)
( @{$paths_of{o}}
? [ shellwords($P->('ar')),
shellwords($P->('ar.flags')),
$lib_o,
@{$paths_of{o}},
]
: ()
),
# Link
[ ($P->('ld') ? shellwords($P->('ld')) : shellwords($P->($NAME))),
_props_to_opts($opt_of{o}, $abs2rel_func->($target->get_path())),
$path_of_main_o,
@{$paths_of{'o.special'}},
( @{$paths_of{o}}
? ( _props_to_opts($opt_of{L}, $lib_o_dir),
_props_to_opts($opt_of{l}, $root),
)
: ()
),
_props_to_opts($opt_of{L}, shellwords($P->($NAME . '.lib-paths'))),
_props_to_opts($opt_of{l}, shellwords($P->($NAME . '.libs'))),
shellwords($P->($NAME . '.flag-omp')),
shellwords($P->($NAME . '.flags-ld')),
],
) {
my %value_of = %{$attrib_ref->{util}->shell_simple($command_list_ref)};
if ($value_of{rc}) {
return $E->throw(
$E->SHELL,
{command_list => $command_list_ref, %value_of},
$value_of{e},
);
}
$attrib_ref->{util}->event(
FCM::Context::Event->MAKE_BUILD_SHELL_OUT, @value_of{qw{o e}},
);
}
if (!$keep_lib_o) {
unlink($lib_o);
rmtree($lib_o_dir);
}
$target;
}
# ------------------------------------------------------------------------------
1;
__END__
=head1 NAME
FCM::System::Make::Build::Task::Link
=head1 SYNOPSIS
use FCM::System::Make::Build::Task::Link;
my $build_task = FCM::System::Make::Build::Task::Link->new(\%attrib);
$build_task->main($target);
=head1 DESCRIPTION
Invokes the linker to create the target executable.
=head1 METHODS
=over 4
=item $class->new(\%attrib)
Creates and returns a new instance. %attrib should contain:
=over 4
=item {name}
The property name of the linker.
=item {prop_of}
A HASH to map the property names (used by this task) to their default values.
=item {util}
An instance of L<FCM::Util|FCM::Util>.
=back
=item $instance->main($target)
Invokes the linker to create the $target executable. It uses the
$target->get_info_of('deps')->{o} ARRAY and
$target->get_info_of('deps')->{"o.special"} ARRAY as dependencies. The first
type "o" dependency item is expected to be the object file containing the main
program. All other "o" dependency items are placed in a temporary archive
before invoking the linker command. The main object and "o.special" dependency
items are entered into the command line of the linker to produce the
executable.
=item $instance->prop_of()
Returns the HASH that maps the property names (used by this task) to their
default values.
=back
=head1 COPYRIGHT
(C) Crown copyright Met Office. All rights reserved.
=cut
|