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# Copyright © 2006-2013 Guillem Jover <guillem@debian.org>
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
package Dpkg::Arch;
use strict;
use warnings;
our $VERSION = '0.01';
use Exporter qw(import);
our @EXPORT_OK = qw(get_raw_build_arch get_raw_host_arch
get_build_arch get_host_arch get_gcc_host_gnu_type
get_valid_arches debarch_eq debarch_is debarch_is_wildcard
debarch_to_cpuattrs
debarch_to_gnutriplet gnutriplet_to_debarch
debtriplet_to_gnutriplet gnutriplet_to_debtriplet
debtriplet_to_debarch debarch_to_debtriplet
gnutriplet_to_multiarch debarch_to_multiarch);
use POSIX qw(:errno_h);
use Dpkg ();
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::Util qw(:list);
use Dpkg::BuildEnv;
my (@cpu, @os);
my (%cputable, %ostable);
my (%cputable_re, %ostable_re);
my (%cpubits, %cpuendian);
my %abibits;
my %debtriplet_to_debarch;
my %debarch_to_debtriplet;
{
my $build_arch;
my $host_arch;
my $gcc_host_gnu_type;
sub get_raw_build_arch()
{
return $build_arch if defined $build_arch;
# Note: We *always* require an installed dpkg when inferring the
# build architecture. The bootstrapping case is handled by
# dpkg-architecture itself, by avoiding computing the DEB_BUILD_
# variables when they are not requested.
$build_arch = `dpkg --print-architecture`;
syserr('dpkg --print-architecture failed') if $? >> 8;
chomp $build_arch;
return $build_arch;
}
sub get_build_arch()
{
return Dpkg::BuildEnv::get('DEB_BUILD_ARCH') || get_raw_build_arch();
}
sub get_gcc_host_gnu_type()
{
return $gcc_host_gnu_type if defined $gcc_host_gnu_type;
$gcc_host_gnu_type = `\${CC:-gcc} -dumpmachine`;
if ($? >> 8) {
$gcc_host_gnu_type = '';
} else {
chomp $gcc_host_gnu_type;
}
return $gcc_host_gnu_type;
}
sub get_raw_host_arch()
{
return $host_arch if defined $host_arch;
$gcc_host_gnu_type = get_gcc_host_gnu_type();
if ($gcc_host_gnu_type eq '') {
warning(_g("couldn't determine gcc system type, falling back to " .
'default (native compilation)'));
} else {
my (@host_archtriplet) = gnutriplet_to_debtriplet($gcc_host_gnu_type);
$host_arch = debtriplet_to_debarch(@host_archtriplet);
if (defined $host_arch) {
$gcc_host_gnu_type = debtriplet_to_gnutriplet(@host_archtriplet);
} else {
warning(_g('unknown gcc system type %s, falling back to ' .
'default (native compilation)'), $gcc_host_gnu_type);
$gcc_host_gnu_type = '';
}
}
if (!defined($host_arch)) {
# Switch to native compilation.
$host_arch = get_raw_build_arch();
}
return $host_arch;
}
sub get_host_arch()
{
return Dpkg::BuildEnv::get('DEB_HOST_ARCH') || get_raw_host_arch();
}
}
sub get_valid_arches()
{
read_cputable();
read_ostable();
my @arches;
foreach my $os (@os) {
foreach my $cpu (@cpu) {
my $arch = debtriplet_to_debarch(split(/-/, $os, 2), $cpu);
push @arches, $arch if defined($arch);
}
}
return @arches;
}
my $cputable_loaded = 0;
sub read_cputable
{
return if ($cputable_loaded);
local $_;
local $/ = "\n";
open my $cputable_fh, '<', "$Dpkg::DATADIR/cputable"
or syserr(_g('cannot open %s'), 'cputable');
while (<$cputable_fh>) {
if (m/^(?!\#)(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s+(\S+)/) {
$cputable{$1} = $2;
$cputable_re{$1} = $3;
$cpubits{$1} = $4;
$cpuendian{$1} = $5;
push @cpu, $1;
}
}
close $cputable_fh;
$cputable_loaded = 1;
}
my $ostable_loaded = 0;
sub read_ostable
{
return if ($ostable_loaded);
local $_;
local $/ = "\n";
open my $ostable_fh, '<', "$Dpkg::DATADIR/ostable"
or syserr(_g('cannot open %s'), 'ostable');
while (<$ostable_fh>) {
if (m/^(?!\#)(\S+)\s+(\S+)\s+(\S+)/) {
$ostable{$1} = $2;
$ostable_re{$1} = $3;
push @os, $1;
}
}
close $ostable_fh;
$ostable_loaded = 1;
}
my $abitable_loaded = 0;
sub abitable_load()
{
return if ($abitable_loaded);
local $_;
local $/ = "\n";
# Because the abitable is only for override information, do not fail if
# it does not exist, as that will only mean the other tables do not have
# an entry needing to be overridden. This way we do not require a newer
# dpkg by libdpkg-perl.
if (open my $abitable_fh, '<', "$Dpkg::DATADIR/abitable") {
while (<$abitable_fh>) {
if (m/^(?!\#)(\S+)\s+(\S+)/) {
$abibits{$1} = $2;
}
}
close $abitable_fh;
} elsif ($! != ENOENT) {
syserr(_g('cannot open %s'), 'abitable');
}
$abitable_loaded = 1;
}
my $triplettable_loaded = 0;
sub read_triplettable()
{
return if ($triplettable_loaded);
read_cputable();
local $_;
local $/ = "\n";
open my $triplettable_fh, '<', "$Dpkg::DATADIR/triplettable"
or syserr(_g('cannot open %s'), 'triplettable');
while (<$triplettable_fh>) {
if (m/^(?!\#)(\S+)\s+(\S+)/) {
my $debtriplet = $1;
my $debarch = $2;
if ($debtriplet =~ /<cpu>/) {
foreach my $_cpu (@cpu) {
(my $dt = $debtriplet) =~ s/<cpu>/$_cpu/;
(my $da = $debarch) =~ s/<cpu>/$_cpu/;
next if exists $debarch_to_debtriplet{$da}
or exists $debtriplet_to_debarch{$dt};
$debarch_to_debtriplet{$da} = $dt;
$debtriplet_to_debarch{$dt} = $da;
}
} else {
$debarch_to_debtriplet{$2} = $1;
$debtriplet_to_debarch{$1} = $2;
}
}
}
close $triplettable_fh;
$triplettable_loaded = 1;
}
sub debtriplet_to_gnutriplet(@)
{
my ($abi, $os, $cpu) = @_;
read_cputable();
read_ostable();
return unless defined($abi) && defined($os) && defined($cpu) &&
exists($cputable{$cpu}) && exists($ostable{"$abi-$os"});
return join('-', $cputable{$cpu}, $ostable{"$abi-$os"});
}
sub gnutriplet_to_debtriplet($)
{
my ($gnu) = @_;
return unless defined($gnu);
my ($gnu_cpu, $gnu_os) = split(/-/, $gnu, 2);
return unless defined($gnu_cpu) && defined($gnu_os);
read_cputable();
read_ostable();
my ($os, $cpu);
foreach my $_cpu (@cpu) {
if ($gnu_cpu =~ /^$cputable_re{$_cpu}$/) {
$cpu = $_cpu;
last;
}
}
foreach my $_os (@os) {
if ($gnu_os =~ /^(.*-)?$ostable_re{$_os}$/) {
$os = $_os;
last;
}
}
return if !defined($cpu) || !defined($os);
return (split(/-/, $os, 2), $cpu);
}
sub gnutriplet_to_multiarch($)
{
my ($gnu) = @_;
my ($cpu, $cdr) = split(/-/, $gnu, 2);
if ($cpu =~ /^i[456]86$/) {
return "i386-$cdr";
} else {
return $gnu;
}
}
sub debarch_to_multiarch($)
{
my ($arch) = @_;
return gnutriplet_to_multiarch(debarch_to_gnutriplet($arch));
}
sub debtriplet_to_debarch(@)
{
my ($abi, $os, $cpu) = @_;
read_triplettable();
if (!defined($abi) || !defined($os) || !defined($cpu)) {
return;
} elsif (exists $debtriplet_to_debarch{"$abi-$os-$cpu"}) {
return $debtriplet_to_debarch{"$abi-$os-$cpu"};
} else {
return;
}
}
sub debarch_to_debtriplet($)
{
local ($_) = @_;
my $arch;
read_triplettable();
if (/^linux-([^-]*)/) {
# XXX: Might disappear in the future, not sure yet.
$arch = $1;
} else {
$arch = $_;
}
my $triplet = $debarch_to_debtriplet{$arch};
if (defined($triplet)) {
return split(/-/, $triplet, 3);
} else {
return;
}
}
sub debarch_to_gnutriplet($)
{
my ($arch) = @_;
return debtriplet_to_gnutriplet(debarch_to_debtriplet($arch));
}
sub gnutriplet_to_debarch($)
{
my ($gnu) = @_;
return debtriplet_to_debarch(gnutriplet_to_debtriplet($gnu));
}
sub debwildcard_to_debtriplet($)
{
my ($arch) = @_;
my @tuple = split /-/, $arch, 3;
if (any { $_ eq 'any' } @tuple) {
if (scalar @tuple == 3) {
return @tuple;
} elsif (scalar @tuple == 2) {
return ('any', @tuple);
} else {
return ('any', 'any', 'any');
}
} else {
return debarch_to_debtriplet($arch);
}
}
sub debarch_to_cpuattrs($)
{
my ($arch) = @_;
my ($abi, $os, $cpu) = debarch_to_debtriplet($arch);
if (defined($cpu)) {
abitable_load();
return ($abibits{$abi} || $cpubits{$cpu}, $cpuendian{$cpu});
} else {
return;
}
}
sub debarch_eq($$)
{
my ($a, $b) = @_;
return 1 if ($a eq $b);
my @a = debarch_to_debtriplet($a);
my @b = debarch_to_debtriplet($b);
return 0 if scalar @a != 3 or scalar @b != 3;
return ($a[0] eq $b[0] && $a[1] eq $b[1] && $a[2] eq $b[2]);
}
sub debarch_is($$)
{
my ($real, $alias) = @_;
return 1 if ($alias eq $real or $alias eq 'any');
my @real = debarch_to_debtriplet($real);
my @alias = debwildcard_to_debtriplet($alias);
return 0 if scalar @real != 3 or scalar @alias != 3;
if (($alias[0] eq $real[0] || $alias[0] eq 'any') &&
($alias[1] eq $real[1] || $alias[1] eq 'any') &&
($alias[2] eq $real[2] || $alias[2] eq 'any')) {
return 1;
}
return 0;
}
sub debarch_is_wildcard($)
{
my ($arch) = @_;
return 0 if $arch eq 'all';
my @triplet = debwildcard_to_debtriplet($arch);
return 0 if scalar @triplet != 3;
return 1 if any { $_ eq 'any' } @triplet;
return 0;
}
1;