1#! @PERL@
2# -*- Perl -*-
3# @configure_input@
4
5eval 'case $# in 0) exec @PERL@ -S "$0";; *) exec @PERL@ -S "$0" "$@";; esac'
6    if 0;
7
8# autoheader -- create `config.h.in' from `configure.ac'
9
10# Copyright (C) 1992-1994, 1996, 1998-2012 Free Software Foundation,
11# Inc.
12
13# This program is free software: you can redistribute it and/or modify
14# it under the terms of the GNU General Public License as published by
15# the Free Software Foundation, either version 3 of the License, or
16# (at your option) any later version.
17
18# This program is distributed in the hope that it will be useful,
19# but WITHOUT ANY WARRANTY; without even the implied warranty of
20# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21# GNU General Public License for more details.
22
23# You should have received a copy of the GNU General Public License
24# along with this program.  If not, see <http://www.gnu.org/licenses/>.
25
26# Written by Roland McGrath.
27# Rewritten in Perl by Akim Demaille.
28
29BEGIN
30{
31  my $pkgdatadir = $ENV{'autom4te_perllibdir'} || '@pkgdatadir@';
32  unshift @INC, "$pkgdatadir";
33
34  # Override SHELL.  On DJGPP SHELL may not be set to a shell
35  # that can handle redirection and quote arguments correctly,
36  # e.g.: COMMAND.COM.  For DJGPP always use the shell that configure
37  # has detected.
38  $ENV{'SHELL'} = '@SHELL@' if ($^O eq 'dos');
39}
40
41use Autom4te::ChannelDefs;
42use Autom4te::Channels;
43use Autom4te::Configure_ac;
44use Autom4te::FileUtils;
45use Autom4te::General;
46use Autom4te::XFile;
47use strict;
48
49# Using `do FILE', we need `local' vars.
50use vars qw ($config_h %verbatim %symbol);
51
52# Lib files.
53my $autom4te = $ENV{'AUTOM4TE'} || '@bindir@/@autom4te-name@';
54local $config_h;
55my $config_h_in;
56my @prepend_include;
57my @include;
58
59
60# $HELP
61# -----
62$help = "Usage: $0 [OPTION]... [TEMPLATE-FILE]
63
64Create a template file of C \`\#define\' statements for \`configure\' to
65use.  To this end, scan TEMPLATE-FILE, or \`configure.ac\' if present,
66or else \`configure.in\'.
67
68  -h, --help               print this help, then exit
69  -V, --version            print version number, then exit
70  -v, --verbose            verbosely report processing
71  -d, --debug              don\'t remove temporary files
72  -f, --force              consider all files obsolete
73  -W, --warnings=CATEGORY  report the warnings falling in CATEGORY
74
75" . Autom4te::ChannelDefs::usage () . "
76
77Library directories:
78  -B, --prepend-include=DIR  prepend directory DIR to search path
79  -I, --include=DIR          append directory DIR to search path
80
81Report bugs to <bug-autoconf\@gnu.org>.
82GNU Autoconf home page: <http://www.gnu.org/software/autoconf/>.
83General help using GNU software: <http://www.gnu.org/gethelp/>.
84";
85
86
87# $VERSION
88# --------
89$version = "autoheader (@PACKAGE_NAME@) @VERSION@
90Copyright (C) @RELEASE_YEAR@ Free Software Foundation, Inc.
91License GPLv3+/Autoconf: GNU GPL version 3 or later
92<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
93This is free software: you are free to change and redistribute it.
94There is NO WARRANTY, to the extent permitted by law.
95
96Written by Roland McGrath and Akim Demaille.
97";
98
99
100## ---------- ##
101## Routines.  ##
102## ---------- ##
103
104
105# parse_args ()
106# -------------
107# Process any command line arguments.
108sub parse_args ()
109{
110  my $srcdir;
111
112  parse_WARNINGS;
113  getopt ('I|include=s'         => \@include,
114	  'B|prepend-include=s' => \@prepend_include,
115	  'W|warnings=s'        => \&parse_warnings);
116
117  if (! @ARGV)
118    {
119      my $configure_ac = require_configure_ac;
120      push @ARGV, $configure_ac;
121    }
122}
123
124
125## -------------- ##
126## Main program.  ##
127## -------------- ##
128
129mktmpdir ('ah');
130switch_warning 'obsolete';
131parse_args;
132
133# Preach.
134my $config_h_top = find_file ("config.h.top?",
135			      reverse (@prepend_include), @include);
136my $config_h_bot = find_file ("config.h.bot?",
137			      reverse (@prepend_include), @include);
138my $acconfig_h = find_file ("acconfig.h?",
139			    reverse (@prepend_include), @include);
140if ($config_h_top || $config_h_bot || $acconfig_h)
141  {
142    my $msg = << "END";
143    Using auxiliary files such as \`acconfig.h\', \`config.h.bot\'
144    and \`config.h.top\', to define templates for \`config.h.in\'
145    is deprecated and discouraged.
146
147    Using the third argument of \`AC_DEFINE\' and
148    \`AC_DEFINE_UNQUOTED\' allows one to define a template without
149    \`acconfig.h\':
150
151      AC_DEFINE([NEED_FUNC_MAIN], 1,
152		[Define if a function \`main\' is needed.])
153
154    More sophisticated templates can also be produced, see the
155    documentation.
156END
157    $msg =~ s/^    /WARNING: /gm;
158    msg 'obsolete', $msg;
159  }
160
161# Set up autoconf.
162my $autoconf = "'$autom4te' --language=autoconf ";
163$autoconf .= join (' --include=', '', map { shell_quote ($_) } @include);
164$autoconf .= join (' --prepend-include=', '', map { shell_quote ($_) } @prepend_include);
165$autoconf .= ' --debug' if $debug;
166$autoconf .= ' --force' if $force;
167$autoconf .= ' --verbose' if $verbose;
168
169# ----------------------- #
170# Real work starts here.  #
171# ----------------------- #
172
173# Source what the traces are trying to tell us.
174verb "$me: running $autoconf to trace from $ARGV[0]";
175my $quoted_tmp = shell_quote ($tmp);
176xsystem ("$autoconf"
177	 # If you change this list, update the
178	 # `Autoheader-preselections' section of autom4te.in.
179	 . ' --trace AC_CONFIG_HEADERS:\'$$config_h ||= \'"\'"\'$1\'"\'"\';\''
180	 . ' --trace AH_OUTPUT:\'$$verbatim{\'"\'"\'$1\'"\'"\'} = \'"\'"\'$2\'"\'"\';\''
181	 . ' --trace AC_DEFINE_TRACE_LITERAL:\'$$symbol{\'"\'"\'$1\'"\'"\'} = 1;\''
182	 . " " . shell_quote ($ARGV[0]) . " >$quoted_tmp/traces.pl");
183
184local (%verbatim, %symbol);
185debug "$me: \`do'ing $tmp/traces.pl:\n" . `sed 's/^/| /' $quoted_tmp/traces.pl`;
186do "$tmp/traces.pl";
187warn "couldn't parse $tmp/traces.pl: $@" if $@;
188unless ($config_h)
189  {
190    error "error: AC_CONFIG_HEADERS not found in $ARGV[0]";
191    exit 1;
192  }
193
194# We template only the first CONFIG_HEADER.
195$config_h =~ s/ .*//;
196# Support "outfile[:infile]", defaulting infile="outfile.in".
197($config_h, $config_h_in) = split (':', $config_h, 2);
198$config_h_in ||= "$config_h.in";
199
200# %SYMBOL might contain things like `F77_FUNC(name,NAME)', but we keep
201# only the name of the macro.
202%symbol = map { s/\(.*//; $_ => 1 } keys %symbol;
203
204my $out = new Autom4te::XFile ("> " . open_quote ("$tmp/config.hin"));
205
206# Don't write "do not edit" -- it will get copied into the
207# config.h, which it's ok to edit.
208print $out "/* $config_h_in.  Generated from $ARGV[0] by autoheader.  */\n";
209
210# Dump the top.
211if ($config_h_top)
212  {
213    my $in = new Autom4te::XFile ("< " . open_quote ($config_h_top));
214    while ($_ = $in->getline)
215      {
216	print $out $_;
217      }
218  }
219
220# Dump `acconfig.h', except for its bottom portion.
221if ($acconfig_h)
222  {
223    my $in = new Autom4te::XFile ("< " . open_quote ($acconfig_h));
224    while ($_ = $in->getline)
225      {
226	last if /\@BOTTOM\@/;
227	next if /\@TOP\@/;
228	print $out $_;
229      }
230  }
231
232# Dump the templates from `configure.ac'.
233foreach (sort keys %verbatim)
234  {
235    print $out "\n$verbatim{$_}\n";
236  }
237
238# Dump bottom portion of `acconfig.h'.
239if ($acconfig_h)
240  {
241    my $in = new Autom4te::XFile ("< " . open_quote ($acconfig_h));
242    my $dump = 0;
243    while ($_ = $in->getline)
244      {
245	print $out $_ if $dump;
246	$dump = 1  if /\@BOTTOM\@/;
247      }
248  }
249
250# Dump the bottom.
251if ($config_h_bot)
252  {
253    my $in = new Autom4te::XFile ("< " . open_quote ($config_h_bot));
254    while ($_ = $in->getline)
255      {
256	print $out $_;
257      }
258  }
259
260$out->close;
261
262# Check that all the symbols have a template.
263{
264  my $in = new Autom4te::XFile ("< " . open_quote ("$tmp/config.hin"));
265  my $suggest_ac_define = 1;
266  while ($_ = $in->getline)
267    {
268      my ($symbol) = /^\#\s*\w+\s+(\w+)/
269	or next;
270      delete $symbol{$symbol};
271    }
272  foreach (sort keys %symbol)
273    {
274      msg 'syntax', "warning: missing template: $_";
275      if ($suggest_ac_define)
276	{
277	  msg 'syntax',  "Use AC_DEFINE([$_], [], [Description])";
278	  $suggest_ac_define = 0;
279	}
280
281    }
282  exit 1
283    if keys %symbol;
284}
285
286update_file ("$tmp/config.hin", "$config_h_in", $force);
287
288### Setup "GNU" style for perl-mode and cperl-mode.
289## Local Variables:
290## perl-indent-level: 2
291## perl-continued-statement-offset: 2
292## perl-continued-brace-offset: 0
293## perl-brace-offset: 0
294## perl-brace-imaginary-offset: 0
295## perl-label-offset: -2
296## cperl-indent-level: 2
297## cperl-brace-offset: 0
298## cperl-continued-brace-offset: 0
299## cperl-label-offset: -2
300## cperl-extra-newline-before-brace: t
301## cperl-merge-trailing-else: nil
302## cperl-continued-statement-offset: 2
303## End:
304