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# Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
# 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, 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 <http://www.gnu.org/licenses/>.
package Automake::Options;
use strict;
use Exporter;
use Automake::Config;
use Automake::ChannelDefs;
use Automake::Channels;
use Automake::Version;
use vars qw (@ISA @EXPORT);
@ISA = qw (Exporter);
@EXPORT = qw (option global_option
set_option set_global_option
unset_option unset_global_option
process_option_list process_global_option_list
set_strictness $strictness $strictness_name
&FOREIGN &GNU &GNITS);
=head1 NAME
Automake::Options - keep track of Automake options
=head1 SYNOPSIS
use Automake::Options;
# Option lookup and setting.
$opt = option 'name';
$opt = global_option 'name';
set_option 'name', 'value';
set_global_option 'name', 'value';
unset_option 'name';
unset_global_option 'name';
# Batch option setting.
process_option_list $location, @names;
process_global_option_list $location, @names;
# Strictness lookup and setting.
set_strictness 'foreign';
set_strictness 'gnu';
set_strictness 'gnits';
if ($strictness >= GNU) { ... }
print "$strictness_name\n";
=head1 DESCRIPTION
This packages manages Automake's options and strictness settings.
Options can be either local or global. Local options are set using an
C<AUTOMAKE_OPTIONS> variable in a F<Makefile.am> and apply only to
this F<Makefile.am>. Global options are set from the command line or
passed as an argument to C<AM_INIT_AUTOMAKE>, they apply to all
F<Makefile.am>s.
=cut
# Values are the Automake::Location of the definition, except
# for 'ansi2knr' whose value is a pair [filename, Location].
use vars '%_options'; # From AUTOMAKE_OPTIONS
use vars '%_global_options'; # from AM_INIT_AUTOMAKE or the command line.
=head2 Constants
=over 4
=item FOREIGN
=item GNU
=item GNITS
Strictness constants used as values for C<$strictness>.
=back
=cut
# Constants to define the "strictness" level.
use constant FOREIGN => 0;
use constant GNU => 1;
use constant GNITS => 2;
=head2 Variables
=over 4
=item C<$strictness>
The current strictness. One of C<FOREIGN>, C<GNU>, or C<GNITS>.
=item C<$strictness_name>
The current strictness name. One of C<'foreign'>, C<'gnu'>, or C<'gnits'>.
=back
=cut
# Strictness levels.
use vars qw ($strictness $strictness_name);
# Strictness level as set on command line.
use vars qw ($_default_strictness $_default_strictness_name);
=head2 Functions
=over 4
=item C<Automake::Options::reset>
Reset the options variables for the next F<Makefile.am>.
In other words, this gets rid of all local options in use by the
previous F<Makefile.am>.
=cut
sub reset ()
{
%_options = %_global_options;
# The first time we are run,
# remember the current setting as the default.
if (defined $_default_strictness)
{
$strictness = $_default_strictness;
$strictness_name = $_default_strictness_name;
}
else
{
$_default_strictness = $strictness;
$_default_strictness_name = $strictness_name;
}
}
=item C<$value = option ($name)>
=item C<$value = global_option ($name)>
Query the state of an option. If the option is unset, this
returns the empty list. Otherwise it returns the option's value,
as set by C<set_option> or C<set_global_option>.
Note that C<global_option> should be used only when it is
important to make sure an option hasn't been set locally.
Otherwise C<option> should be the standard function to
check for options (be they global or local).
=cut
sub option ($)
{
my ($name) = @_;
return () unless defined $_options{$name};
return $_options{$name};
}
sub global_option ($)
{
my ($name) = @_;
return () unless defined $_global_options{$name};
return $_global_options{$name};
}
=item C<set_option ($name, $value)>
=item C<set_global_option ($name, $value)>
Set an option. By convention, C<$value> is usually the location
of the option definition.
=cut
sub set_option ($$)
{
my ($name, $value) = @_;
$_options{$name} = $value;
}
sub set_global_option ($$)
{
my ($name, $value) = @_;
$_global_options{$name} = $value;
}
=item C<unset_option ($name)>
=item C<unset_global_option ($name)>
Unset an option.
=cut
sub unset_option ($)
{
my ($name) = @_;
delete $_options{$name};
}
sub unset_global_option ($)
{
my ($name) = @_;
delete $_global_options{$name};
}
=item C<process_option_list ($where, @options)>
=item C<process_global_option_list ($where, @options)>
Process Automake's option lists. C<@options> should be a list of
words, as they occur in C<AUTOMAKE_OPTIONS> or C<AM_INIT_AUTOMAKE>.
Return 1 on error, 0 otherwise.
=cut
# $BOOL
# _process_option_list (\%OPTIONS, $WHERE, @OPTIONS)
# -------------------------------------------------
# Process a list of options. Return 1 on error, 0 otherwise.
# \%OPTIONS is the hash to fill with options data, $WHERE is
# the location where @OPTIONS occurred.
sub _process_option_list (\%$@)
{
my ($options, $where, @list) = @_;
foreach (@list)
{
$options->{$_} = $where;
if ($_ eq 'gnits' || $_ eq 'gnu' || $_ eq 'foreign')
{
set_strictness ($_);
}
elsif (/^(.*\/)?ansi2knr$/)
{
# An option like "../lib/ansi2knr" is allowed. With no
# path prefix, we assume the required programs are in this
# directory. We save the actual option for later.
$options->{'ansi2knr'} = [$_, $where];
}
elsif ($_ eq 'no-installman' || $_ eq 'no-installinfo'
|| $_ eq 'dist-shar' || $_ eq 'dist-zip'
|| $_ eq 'dist-tarZ' || $_ eq 'dist-bzip2'
|| $_ eq 'dist-lzma' || $_ eq 'dist-xz'
|| $_ eq 'no-dist-gzip' || $_ eq 'no-dist'
|| $_ eq 'dejagnu' || $_ eq 'no-texinfo.tex'
|| $_ eq 'readme-alpha' || $_ eq 'check-news'
|| $_ eq 'subdir-objects' || $_ eq 'nostdinc'
|| $_ eq 'no-exeext' || $_ eq 'no-define'
|| $_ eq 'std-options'
|| $_ eq 'color-tests' || $_ eq 'parallel-tests'
|| $_ eq 'cygnus' || $_ eq 'no-dependencies')
{
# Explicitly recognize these.
}
elsif ($_ =~ /^filename-length-max=(\d+)$/)
{
delete $options->{$_};
$options->{'filename-length-max'} = [$_, $1];
}
elsif ($_ eq 'silent-rules')
{
error ($where,
"option `$_' can only be used as argument to AM_INIT_AUTOMAKE\n"
. "but not in AUTOMAKE_OPTIONS makefile statements")
if $where->get !~ /^configure\./;
}
elsif ($_ eq 'tar-v7' || $_ eq 'tar-ustar' || $_ eq 'tar-pax')
{
error ($where,
"option `$_' can only be used as argument to AM_INIT_AUTOMAKE\n"
. "but not in AUTOMAKE_OPTIONS makefile statements")
if $where->get !~ /^configure\./;
for my $opt ('tar-v7', 'tar-ustar', 'tar-pax')
{
next if $opt eq $_;
if (exists $options->{$opt})
{
error ($where,
"options `$_' and `$opt' are mutually exclusive");
last;
}
}
}
elsif (/^\d+\.\d+(?:\.\d+)?[a-z]?(?:-[A-Za-z0-9]+)?$/)
{
# Got a version number.
if (Automake::Version::check ($VERSION, $&))
{
error ($where, "require Automake $_, but have $VERSION",
uniq_scope => US_GLOBAL);
return 1;
}
}
elsif (/^(?:--warnings=|-W)(.*)$/)
{
foreach my $cat (split (',', $1))
{
msg 'unsupported', $where, "unknown warning category `$cat'"
if switch_warning $cat;
}
}
else
{
error ($where, "option `$_' not recognized",
uniq_scope => US_GLOBAL);
return 1;
}
}
return 0;
}
sub process_option_list ($@)
{
my ($where, @list) = @_;
return _process_option_list (%_options, $where, @list);
}
sub process_global_option_list ($@)
{
my ($where, @list) = @_;
return _process_option_list (%_global_options, $where, @list);
}
=item C<set_strictness ($name)>
Set the current strictness level.
C<$name> should be one of C<'foreign'>, C<'gnu'>, or C<'gnits'>.
=cut
# Set strictness.
sub set_strictness ($)
{
$strictness_name = $_[0];
Automake::ChannelDefs::set_strictness ($strictness_name);
if ($strictness_name eq 'gnu')
{
$strictness = GNU;
}
elsif ($strictness_name eq 'gnits')
{
$strictness = GNITS;
}
elsif ($strictness_name eq 'foreign')
{
$strictness = FOREIGN;
}
else
{
prog_error "level `$strictness_name' not recognized\n";
}
}
1;
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