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, 1993, 1994, 1996, 1998, 1999, 2000, 2001, 2002,
11# 2003, 2004, 2005, 2006 Free Software Foundation, 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 2, or (at your option)
16# 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, write to the Free Software
25# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
26# 02110-1301, USA.
27
28# Written by Roland McGrath.
29# Rewritten in Perl by Akim Demaille.
30
31BEGIN
32{
33  my $datadir = $ENV{'autom4te_perllibdir'} || '@datadir@';
34  unshift @INC, "$datadir";
35
36  # Override SHELL.  On DJGPP SHELL may not be set to a shell
37  # that can handle redirection and quote arguments correctly,
38  # e.g.: COMMAND.COM.  For DJGPP always use the shell that configure
39  # has detected.
40  $ENV{'SHELL'} = '@SHELL@' if ($^O eq 'dos');
41}
42
43use Autom4te::ChannelDefs;
44use Autom4te::Channels;
45use Autom4te::Configure_ac;
46use Autom4te::FileUtils;
47use Autom4te::General;
48use Autom4te::XFile;
49use strict;
50
51# Using `do FILE', we need `local' vars.
52use vars qw ($config_h %verbatim %symbol);
53
54# Lib files.
55my $autom4te = $ENV{'AUTOM4TE'} || '@bindir@/@autom4te-name@';
56local $config_h;
57my $config_h_in;
58my @prepend_include;
59my @include;
60
61
62# $HELP
63# -----
64$help = "Usage: $0 [OPTION] ... [TEMPLATE-FILE]
65
66Create a template file of C \`\#define\' statements for \`configure\' to
67use.  To this end, scan TEMPLATE-FILE, or \`configure.ac\' if present,
68or else \`configure.in\'.
69
70  -h, --help               print this help, then exit
71  -V, --version            print version number, then exit
72  -v, --verbose            verbosely report processing
73  -d, --debug              don\'t remove temporary files
74  -f, --force              consider all files obsolete
75  -W, --warnings=CATEGORY  report the warnings falling in CATEGORY
76
77" . Autom4te::ChannelDefs::usage () . "
78
79Library directories:
80  -B, --prepend-include=DIR  prepend directory DIR to search path
81  -I, --include=DIR          append directory DIR to search path
82
83Report bugs to <bug-autoconf\@gnu.org>.
84";
85
86
87# $VERSION
88# --------
89$version = "autoheader (@PACKAGE_NAME@) @VERSION@
90Copyright (C) 2006 Free Software Foundation, Inc.
91This is free software.  You may redistribute copies of it under the terms of
92the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
93There is NO WARRANTY, to the extent permitted by law.
94
95Written by Roland McGrath and Akim Demaille.
96";
97
98
99## ---------- ##
100## Routines.  ##
101## ---------- ##
102
103
104# parse_args ()
105# -------------
106# Process any command line arguments.
107sub parse_args ()
108{
109  my $srcdir;
110
111  parse_WARNINGS;
112  getopt ('I|include=s'         => \@include,
113	  'B|prepend-include=s' => \@prepend_include,
114	  'W|warnings=s'        => \&parse_warnings);
115
116  if (! @ARGV)
117    {
118      my $configure_ac = require_configure_ac;
119      push @ARGV, $configure_ac;
120    }
121}
122
123
124## -------------- ##
125## Main program.  ##
126## -------------- ##
127
128mktmpdir ('ah');
129switch_warning 'obsolete';
130parse_args;
131
132# Preach.
133my $config_h_top = find_file ("config.h.top?",
134			      reverse (@prepend_include), @include);
135my $config_h_bot = find_file ("config.h.bot?",
136			      reverse (@prepend_include), @include);
137my $acconfig_h = find_file ("acconfig.h?",
138			    reverse (@prepend_include), @include);
139if ($config_h_top || $config_h_bot || $acconfig_h)
140  {
141    my $msg = << "END";
142    Using auxiliary files such as \`acconfig.h\', \`config.h.bot\'
143    and \`config.h.top\', to define templates for \`config.h.in\'
144    is deprecated and discouraged.
145
146    Using the third argument of \`AC_DEFINE\' and
147    \`AC_DEFINE_UNQUOTED\' allows one to define a template without
148    \`acconfig.h\':
149
150      AC_DEFINE([NEED_FUNC_MAIN], 1,
151		[Define if a function \`main\' is needed.])
152
153    More sophisticated templates can also be produced, see the
154    documentation.
155END
156    $msg =~ s/^    /WARNING: /gm;
157    msg 'obsolete', $msg;
158  }
159
160# Set up autoconf.
161my $autoconf = "'$autom4te' --language=autoconf ";
162$autoconf .= join (' ', map { "--include='$_'" } @include);
163$autoconf .= join (' ', map { "--prepend-include='$_'" } @prepend_include);
164$autoconf .= ' --debug' if $debug;
165$autoconf .= ' --force' if $force;
166$autoconf .= ' --verbose' if $verbose;
167
168# ----------------------- #
169# Real work starts here.  #
170# ----------------------- #
171
172# Source what the traces are trying to tell us.
173verb "$me: running $autoconf to trace from $ARGV[0]";
174xsystem ("$autoconf"
175	 # If you change this list, update the
176	 # `Autoheader-preselections' section of autom4te.in.
177	 . ' --trace AC_CONFIG_HEADERS:\'$$config_h ||= \'"\'"\'$1\'"\'"\';\''
178	 . ' --trace AH_OUTPUT:\'$$verbatim{\'"\'"\'$1\'"\'"\'} = \'"\'"\'$2\'"\'"\';\''
179	 . ' --trace AC_DEFINE_TRACE_LITERAL:\'$$symbol{\'"\'"\'$1\'"\'"\'} = 1;\''
180	 . " $ARGV[0] >$tmp/traces.pl");
181
182local (%verbatim, %symbol);
183debug "$me: \`do'ing $tmp/traces.pl:\n" . `sed 's/^/| /' $tmp/traces.pl`;
184do "$tmp/traces.pl";
185warn "couldn't parse $tmp/traces.pl: $@" if $@;
186unless ($config_h)
187  {
188    error "error: AC_CONFIG_HEADERS not found in $ARGV[0]";
189    exit 1;
190  }
191
192# We template only the first CONFIG_HEADER.
193$config_h =~ s/ .*//;
194# Support "outfile[:infile]", defaulting infile="outfile.in".
195($config_h, $config_h_in) = split (':', $config_h, 2);
196$config_h_in ||= "$config_h.in";
197
198# %SYMBOL might contain things like `F77_FUNC(name,NAME)', but we keep
199# only the name of the macro.
200%symbol = map { s/\(.*//; $_ => 1 } keys %symbol;
201
202my $out = new Autom4te::XFile (">$tmp/config.hin");
203
204# Don't write "do not edit" -- it will get copied into the
205# config.h, which it's ok to edit.
206print $out "/* $config_h_in.  Generated from $ARGV[0] by autoheader.  */\n";
207
208# Dump the top.
209if ($config_h_top)
210  {
211    my $in = new Autom4te::XFile ($config_h_top);
212    while ($_ = $in->getline)
213      {
214	print $out $_;
215      }
216  }
217
218# Dump `acconfig.h', except for its bottom portion.
219if ($acconfig_h)
220  {
221    my $in = new Autom4te::XFile ($acconfig_h);
222    while ($_ = $in->getline)
223      {
224	last if /\@BOTTOM\@/;
225	next if /\@TOP\@/;
226	print $out $_;
227      }
228  }
229
230# Dump the templates from `configure.ac'.
231foreach (sort keys %verbatim)
232  {
233    print $out "\n$verbatim{$_}\n";
234  }
235
236# Dump bottom portion of `acconfig.h'.
237if ($acconfig_h)
238  {
239    my $in = new Autom4te::XFile ($acconfig_h);
240    my $dump = 0;
241    while ($_ = $in->getline)
242      {
243	print $out $_ if $dump;
244	$dump = 1  if /\@BOTTOM\@/;
245      }
246  }
247
248# Dump the bottom.
249if ($config_h_bot)
250  {
251    my $in = new Autom4te::XFile ($config_h_bot);
252    while ($_ = $in->getline)
253      {
254	print $out $_;
255      }
256  }
257
258$out->close;
259
260# Check that all the symbols have a template.
261{
262  my $in = new Autom4te::XFile ("$tmp/config.hin");
263  my $suggest_ac_define = 1;
264  while ($_ = $in->getline)
265    {
266      my ($symbol) = /^\#\s*\w+\s+(\w+)/
267	or next;
268      delete $symbol{$symbol};
269    }
270  foreach (sort keys %symbol)
271    {
272      msg 'syntax', "warning: missing template: $_";
273      if ($suggest_ac_define)
274	{
275	  msg 'syntax',  "Use AC_DEFINE([$_], [], [Description])";
276	  $suggest_ac_define = 0;
277	}
278
279    }
280  exit 1
281    if keys %symbol;
282}
283
284update_file ("$tmp/config.hin", "$config_h_in", $force);
285
286### Setup "GNU" style for perl-mode and cperl-mode.
287## Local Variables:
288## perl-indent-level: 2
289## perl-continued-statement-offset: 2
290## perl-continued-brace-offset: 0
291## perl-brace-offset: 0
292## perl-brace-imaginary-offset: 0
293## perl-label-offset: -2
294## cperl-indent-level: 2
295## cperl-brace-offset: 0
296## cperl-continued-brace-offset: 0
297## cperl-label-offset: -2
298## cperl-extra-newline-before-brace: t
299## cperl-merge-trailing-else: nil
300## cperl-continued-statement-offset: 2
301## End:
302