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# Copyright (C) 2018 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 3 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 <http://www.gnu.org/licenses/>.
# Like define_variable, but define a variable to be the configure
# substitution by the same name.
package Automake::ConfVars;
use 5.006;
use strict;
use Exporter;
use Automake::ChannelDefs;
use Automake::Channels;
use Automake::Condition qw (TRUE FALSE);
use Automake::Config;
use Automake::File;
use Automake::Global;
use Automake::Location;
use Automake::Utils;
use Automake::VarDef;
use Automake::Variable;
use vars qw (@ISA @EXPORT);
@ISA = qw (Exporter);
@EXPORT = qw (define_standard_variables);
sub _define_configure_variable ($)
{
my ($var) = @_;
# Some variables we do not want to output. For instance it
# would be a bad idea to output `U = @U@` when `@U@` can be
# substituted as `\`.
my $pretty = exists $ignored_configure_vars{$var} ? VAR_SILENT : VAR_ASIS;
Automake::Variable::define ($var, VAR_CONFIGURE, '', TRUE, subst ($var),
'', $configure_vars{$var}, $pretty);
}
# A helper for read_main_am_file which initializes configure variables
# and variables from header-vars.am.
sub define_standard_variables ()
{
my $saved_output_vars = $output_vars;
my ($comments, undef, $rules) =
file_contents_internal (1, "$libdir/am/header-vars.am",
new Automake::Location);
foreach my $var (sort keys %configure_vars)
{
_define_configure_variable ($var);
}
$output_vars .= $comments . $rules;
}
1;
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