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&=LV[( # # autoconf -- create `configure' using m4 macros
# Copyright (C) 2001-2004, 2006-2007, 2009-2012 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 .
package Autom4te::General;
=head1 NAME
Autom4te::General - general support functions for Autoconf
=head1 SYNOPSIS
use Autom4te::General
=head1 DESCRIPTION
This perl module provides various general purpose support functions
used in several executables of the Autoconf package.
=cut
use 5.006;
use Exporter;
use Autom4te::ChannelDefs;
use Autom4te::Channels;
use Autom4te::Getopt ();
use File::Basename;
use File::Path ();
use File::stat;
use IO::File;
use Carp;
use strict;
use vars qw (@ISA @EXPORT);
@ISA = qw (Exporter);
# Variables we define and export.
my @export_vars =
qw ($debug $force $help $me $tmp $verbose $version);
# Functions we define and export.
my @export_subs =
qw (&debug
&getopt &shell_quote &mktmpdir
&uniq);
# Functions we forward (coming from modules we use).
my @export_forward_subs =
qw (&basename &dirname &fileparse);
@EXPORT = (@export_vars, @export_subs, @export_forward_subs);
# Variable we share with the main package. Be sure to have a single
# copy of them: using `my' together with multiple inclusion of this
# package would introduce several copies.
=head2 Global Variables
=over 4
=item C<$debug>
Set this variable to 1 if debug messages should be enabled. Debug
messages are meant for developers only, or when tracking down an
incorrect execution.
=cut
use vars qw ($debug);
$debug = 0;
=item C<$force>
Set this variable to 1 to recreate all the files, or to consider all
the output files are obsolete.
=cut
use vars qw ($force);
$force = undef;
=item C<$help>
Set to the help message associated with the option C<--help>.
=cut
use vars qw ($help);
$help = undef;
=item C<$me>
The name of this application, for diagnostic messages.
=cut
use vars qw ($me);
$me = basename ($0);
=item C<$tmp>
The name of the temporary directory created by C. Left
C otherwise.
=cut
# Our tmp dir.
use vars qw ($tmp);
$tmp = undef;
=item C<$verbose>
Enable verbosity messages. These messages are meant for ordinary
users, and typically make explicit the steps being performed.
=cut
use vars qw ($verbose);
$verbose = 0;
=item C<$version>
Set to the version message associated to the option C<--version>.
=cut
use vars qw ($version);
$version = undef;
=back
=cut
## ----- ##
## END. ##
## ----- ##
=head2 Functions
=over 4
=item C
Filter Perl's exit codes, delete any temporary directory (unless
C<$debug>), and exit nonzero whenever closing C fails.
=cut
# END
# ---
sub END
{
# $? contains the exit status we will return.
# It was set using one of the following ways:
#
# 1) normal termination
# this sets $? = 0
# 2) calling `exit (n)'
# this sets $? = n
# 3) calling die or friends (croak, confess...):
# a) when $! is non-0
# this set $? = $!
# b) when $! is 0 but $? is not
# this sets $? = ($? >> 8) (i.e., the exit code of the
# last program executed)
# c) when both $! and $? are 0
# this sets $? = 255
#
# Cases 1), 2), and 3b) are fine, but we prefer $? = 1 for 3a) and 3c).
my $status = $?;
$status = 1 if ($! && $! == $?) || $? == 255;
#