share/autoconf/Autom4te/Configure_ac.pm

   1 # Copyright (C) 2003, 2005, 2006  Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 2, or (at your option)
   6 # any later version.
   7
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program; if not, write to the Free Software
  15 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  16 # 02110-1301, USA.
  17
  18 ###############################################################
  19 # The main copy of this file is in Automake's CVS repository. #
  20 # Updates should be sent to automake-patches@gnu.org.         #
  21 ###############################################################
  22
  23 package Autom4te::Configure_ac;
  24
  25 use strict;
  26 use Exporter;
  27 use Autom4te::Channels;
  28 use Autom4te::ChannelDefs;
  29
  30 use vars qw (@ISA @EXPORT);
  31
  32 @ISA = qw (Exporter);
  33 @EXPORT = qw (&find_configure_ac &require_configure_ac);
  34
  35 =head1 NAME
  36
  37 Autom4te::Configure_ac - Locate configure.ac or configure.in.
  38
  39 =head1 SYNOPSIS
  40
  41   use Autom4te::Configure_ac;
  42
  43   # Try to locate configure.in or configure.ac in the current
  44   # directory.  It may be absent.  Complain if both files exist.
  45   my $file_name = find_configure_ac;
  46
  47   # Likewise, but bomb out if the file does not exist.
  48   my $file_name = require_configure_ac;
  49
  50   # Likewise, but in $dir.
  51   my $file_name = find_configure_ac ($dir);
  52   my $file_name = require_configure_ac ($dir);
  53
  54 =cut
  55
  56 sub find_configure_ac (;@)
  57 {
  58   my ($directory) = @_;
  59   $directory ||= '.';
  60   my $configure_ac =
  61     File::Spec->canonpath (File::Spec->catfile ($directory, 'configure.ac'));
  62   my $configure_in =
  63     File::Spec->canonpath (File::Spec->catfile ($directory, 'configure.in'));
  64
  65   if (-f $configure_ac)
  66     {
  67       if (-f $configure_in)
  68         {
  69           msg ('unsupported',
  70                "`$configure_ac' and `$configure_in' both present.\n"
  71                . "proceeding with `$configure_ac'.");
  72         }
  73       return $configure_ac
  74     }
  75   elsif (-f $configure_in)
  76     {
  77       return $configure_in;
  78     }
  79   return $configure_ac;
  80 }
  81
  82
  83 sub require_configure_ac (;$)
  84 {
  85   my $res = find_configure_ac (@_);
  86   fatal "`configure.ac' or `configure.in' is required"
  87     unless -f $res;
  88   return $res
  89 }
  90
  91 1;
  92
  93 ### Setup "GNU" style for perl-mode and cperl-mode.
  94 ## Local Variables:
  95 ## perl-indent-level: 2
  96 ## perl-continued-statement-offset: 2
  97 ## perl-continued-brace-offset: 0
  98 ## perl-brace-offset: 0
  99 ## perl-brace-imaginary-offset: 0
 100 ## perl-label-offset: -2
 101 ## cperl-indent-level: 2
 102 ## cperl-brace-offset: 0
 103 ## cperl-continued-brace-offset: 0
 104 ## cperl-label-offset: -2
 105 ## cperl-extra-newline-before-brace: t
 106 ## cperl-merge-trailing-else: nil
 107 ## cperl-continued-statement-offset: 2
 108 ## End: