annotate lib-src/config.values.sh @ 4938:299dce99bdad

(for main branch) when freeing check against DEADBEEF_CONSTANT since that's what we use elsewhere
author Ben Wing <ben@xemacs.org>
date Tue, 19 Jan 2010 11:25:37 -0600
parents 3580ae2ce979
children e6508b64ee08 308d34e9f07d
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1 : #-*- Perl -*-
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2 eval 'exec perl -w -S $0 ${1+"$@"}' # Portability kludge
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3 if 0;
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4
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5 # config.values.sh --- create config.values.in from ../configure
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6
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7 # Author: Martin Buchholz
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8 # Maintainer: Martin Buchholz
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9 # Keywords: configure elisp report-xemacs-bugs
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10
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11 # This file is part of XEmacs.
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12
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13 # XEmacs is free software; you can redistribute it and/or modify it
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14 # under the terms of the GNU General Public License as published by
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15 # the Free Software Foundation; either version 2, or (at your option)
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16 # any later version.
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17
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18 # XEmacs is distributed in the hope that it will be useful, but
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19 # WITHOUT ANY WARRANTY; without even the implied warranty of
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20 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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21 # General Public License for more details.
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22
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23 # You should have received a copy of the GNU General Public License
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24 # along with XEmacs; see the file COPYING. If not, write to
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25 # the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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26 # Boston, MA 02111-1307, USA.
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27
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28 ### Commentary:
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29
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30 ## Extract all the @foo@ configuration symbols from ../configure
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31 ## to make them available to elisp later (see util/config.el)
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32 ## Primarily useful for creating ridiculously verbose bug reports.
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33 ##
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34 ## See lisp/config.el, ../configure.in,
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35 ## and the Autoconf documentation on AC_OUTPUT, for more details.
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36 ##
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37 ## This script needs only to be run occasionally (before a Net release)
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38 ## by an XEmacs Maintainer (consider yourself so blessed, if you are
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39 ## actually reading this commentary).
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40 ##
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41
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42 if (! -r "./configure") {
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43 chdir ".." or die "Can't chdir: $!";
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44 if (! -r "./configure") {
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45 die "Can't find configure!";
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46 }
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47 }
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48
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49 sub FileContents {
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50 local $/ = undef; # Slurp mode
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51 open (FILE, "< $_[0]") or die "$_[0]: $!";
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52 my $contents = <FILE>;
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53 close FILE or die "$_[0]: $!";
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54 return $contents;
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55 }
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56
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57 my $configure_contents = FileContents "./configure";
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58 my $cvi_contents = FileContents "lib-src/config.values.in";
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59
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60 my $new_cvi_contents =
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61 ";;; Do not edit this file!
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62 ;;; This file was automatically generated, by the config.values.sh script,
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63 ;;; from configure, which was itself automatically generated from configure.in.
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64 ;;;
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65 ;;; See lisp/config.el for details on how this file is used.
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66 ;;;
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67 ;;; You are trapped in a twisty maze of strange-looking files, all autogenerated...
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68
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69 ;;; configure is created, from configure.in, by autoconf
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70 ;;; config.values.in is created, from configure, by config.values.sh
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71 ;;; config.values is created, from config.values.in, by configure
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72 ;;; config.values is read by lisp/config.el,
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73 ;;; to create the (Lisp object) config-value-hash-table
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74
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75 ;;; Variables defined in configure by AC_SUBST follow:
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76 ;;; (These are used in Makefiles)
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77
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78 ";
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79
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80 my %done;
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81 for my $var (sort { $a cmp $b }
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82 $configure_contents =~
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83 /^s\,\@([A-Za-z0-9_]+)\@\,\$[A-Za-z0-9_]+\,;t t/mg) {
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84 $new_cvi_contents .= "$var \"\@$var\@\"\n" unless exists $done{$var};
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85 $done{$var} = 1;
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86 }
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87
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88 $new_cvi_contents .= "
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89 ;;; Variables defined in configure by AC_DEFINE and AC_DEFINE_UNQUOTED follow:
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90 ;;; (These are used in C code)
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91
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92 ";
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93
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94 if ($cvi_contents ne $new_cvi_contents) {
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95 unlink "lib-src/config.values.in";
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96 open (CVI, "> lib-src/config.values.in")
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97 or die "lib-src/config.values.in: $!";
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98 print CVI $new_cvi_contents;
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99 close CVI
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100 or die "lib-src/config.values.in: $!";
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101 }