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# Copyright (C) 2003-2023 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 <https://www.gnu.org/licenses/>.
###############################################################
# The main copy of this file is in Automake's git repository. #
# Updates should be sent to automake-patches@gnu.org. #
###############################################################
package Automake::Configure_ac;
use 5.010;
use strict;
use warnings FATAL => 'all';
use Exporter;
use Automake::ChannelDefs;
use Automake::Channels;
our @ISA = qw (Exporter);
our @EXPORT = qw (&find_configure_ac &require_configure_ac);
=head1 NAME
Automake::Configure_ac - Locate configure.ac or configure.in.
=head1 SYNOPSIS
use Automake::Configure_ac;
# Try to locate configure.in or configure.ac in the current
# directory. It may be absent. Complain if both files exist.
my $file_name = find_configure_ac;
# Likewise, but bomb out if the file does not exist.
my $file_name = require_configure_ac;
# Likewise, but in $dir.
my $file_name = find_configure_ac ($dir);
my $file_name = require_configure_ac ($dir);
=over 4
=back
=head2 Functions
=over 4
=item C<$configure_ac = find_configure_ac ([$directory])>
Find a F<configure.ac> or F<configure.in> file in C<$directory>,
defaulting to the current directory. Complain if both files are present.
Return the name of the file found, or the former if neither is present.
=cut
sub find_configure_ac (;@)
{
my ($directory) = @_;
$directory ||= '.';
my $configure_ac =
File::Spec->canonpath (File::Spec->catfile ($directory, 'configure.ac'));
my $configure_in =
File::Spec->canonpath (File::Spec->catfile ($directory, 'configure.in'));
if (-f $configure_in)
{
msg ('obsolete', "autoconf input should be named 'configure.ac'," .
" not 'configure.in'");
if (-f $configure_ac)
{
msg ('unsupported',
"'$configure_ac' and '$configure_in' both present.\n"
. "proceeding with '$configure_ac'");
return $configure_ac
}
else
{
return $configure_in;
}
}
return $configure_ac;
}
=item C<$configure_ac = require_configure_ac ([$directory])>
Like C<find_configure_ac>, but fail if neither is present.
=cut
sub require_configure_ac (;$)
{
my $res = find_configure_ac (@_);
fatal "'configure.ac' is required" unless -f $res;
return $res
}
1;
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