source: trunk/essentials/sys-devel/automake-1.7/aclocal.in@ 3275

Last change on this file since 3275 was 3139, checked in by bird, 18 years ago

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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# aclocal - create aclocal.m4 by scanning configure.ac
9
10# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002
11# 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., 59 Temple Place - Suite 330, Boston, MA
26# 02111-1307, USA.
27
28# Written by Tom Tromey <tromey@redhat.com>.
29
30BEGIN
31{
32 my $perllibdir = $ENV{'perllibdir'} || $ENV{'UNIXROOT'}.'@datadir@/@PACKAGE@-@APIVERSION@';
33 unshift @INC, $perllibdir;
34}
35
36use Automake::General;
37use Automake::XFile;
38
39# Some constants.
40$VERSION = '@VERSION@';
41$APIVERSION = '@APIVERSION@';
42$PACKAGE = '@PACKAGE@';
43# Note that this isn't pkgdatadir, but a separate directory.
44# Note also that the versioned directory is handled later.
45$acdir = $ENV{'UNIXROOT'}.'@datadir@/aclocal';
46$default_acdir = $acdir;
47# contains a list of directories, one per line, to be added
48# to the dirlist in addition to $acdir, as if -I had been
49# added to the command line. If acdir has been redirected,
50# we will also check the specified acdir (this is done later).
51$default_dirlist = "$default_acdir/dirlist";
52
53# Some globals.
54
55# Exit status.
56$exit_status = 0;
57
58# Name of the top autoconf input: `configure.ac' or `configure.in'.
59$configure_ac = find_configure_ac;
60
61# Text to output.
62$output = '';
63
64# Output file name.
65$output_file = 'aclocal.m4';
66
67# Which macros have been seen.
68%macro_seen = ();
69
70# Which files have been seen.
71%file_seen = ();
72
73# Map macro names to file names.
74%map = ();
75
76# Map file names to file contents.
77%file_contents = ();
78
79# How much to say.
80$verbose = 0;
81
82# Matches a macro definition.
83# AC_DEFUN([macroname], ...)
84# or
85# AC_DEFUN(macroname, ...)
86# When macroname is `['-quoted , we accept any character in the name,
87# except `]'. Otherwise macroname stops on the first `]', `,', `)',
88# or `\n' encountered.
89$ac_defun_rx = "A[CU]_DEFUN\\((?:\\[([^]]+)\\]|([^],)\n]+))";
90
91# Matches an AC_REQUIRE line.
92$ac_require_rx = "AC_REQUIRE\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
93
94
95
96
97local (@dirlist) = &parse_arguments (@ARGV);
98&scan_m4_files (@dirlist);
99&scan_configure;
100if (! $exit_status)
101{
102 &write_aclocal;
103}
104&check_acinclude;
105
106exit $exit_status;
107
108################################################################
109
110# Print usage and exit.
111sub usage ($)
112{
113 local ($status) = @_;
114
115 print "Usage: aclocal [OPTIONS] ...\n\n";
116 print "\
117Generate `aclocal.m4' by scanning `configure.ac' or `configure.in'
118
119 --acdir=DIR directory holding config files
120 --help print this help, then exit
121 -I DIR add directory to search list for .m4 files
122 --output=FILE put output in FILE (default aclocal.m4)
123 --print-ac-dir print name of directory holding m4 files
124 --verbose don't be silent
125 --version print version number, then exit
126
127Report bugs to <bug-automake\@gnu.org>.\n";
128
129 exit $status;
130}
131
132# Parse command line.
133sub parse_arguments (@)
134{
135 local (@arglist) = @_;
136 local (@dirlist);
137 local ($print_and_exit) = 0;
138
139 while (@arglist)
140 {
141 if ($arglist[0] =~ /^--acdir=(.+)$/)
142 {
143 $acdir = $1;
144 }
145 elsif ($arglist[0] =~/^--output=(.+)$/)
146 {
147 $output_file = $1;
148 }
149 elsif ($arglist[0] eq '-I')
150 {
151 shift (@arglist);
152 push (@dirlist, $arglist[0]);
153 }
154 elsif ($arglist[0] eq '--print-ac-dir')
155 {
156 $print_and_exit = 1;
157 }
158 elsif ($arglist[0] eq '--verbose')
159 {
160 ++$verbose;
161 }
162 elsif ($arglist[0] eq '--version')
163 {
164 print "aclocal (GNU $PACKAGE) $VERSION\n\n";
165 print "Copyright (C) 2002 Free Software Foundation, Inc.\n";
166 print "This is free software; see the source for copying conditions. There is NO\n";
167 print "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n";
168 print "Written by Tom Tromey <tromey\@redhat.com>\n";
169 exit 0;
170 }
171 elsif ($arglist[0] eq '--help')
172 {
173 &usage (0);
174 }
175 else
176 {
177 die "aclocal: unrecognized option -- `$arglist[0]'\nTry `aclocal --help' for more information.\n";
178 }
179
180 shift (@arglist);
181 }
182
183 if ($print_and_exit)
184 {
185 print $acdir, "\n";
186 exit 0;
187 }
188
189 $default_dirlist="$acdir/dirlist"
190 if $acdir ne $default_acdir;
191
192 # Search the versioned directory near the end, and then the
193 # unversioned directory last. Only do this if the user didn't
194 # override acdir.
195 push (@dirlist, "$acdir-$APIVERSION")
196 if $acdir eq $default_acdir;
197
198 # By default $(datadir)/aclocal doesn't exist. We don't want to
199 # get an error in the case where we are searching the default
200 # directory and it hasn't been created.
201 push (@dirlist, $acdir)
202 unless $acdir eq $default_acdir && ! -d $acdir;
203
204 # Finally, adds any directory listed in the `dirlist' file.
205 if (open (DEFAULT_DIRLIST, $default_dirlist))
206 {
207 while (<DEFAULT_DIRLIST>)
208 {
209 # Ignore '#' lines.
210 next if /^#/;
211 # strip off newlines and end-of-line comments
212 s/\s*\#.*$//;
213 chomp ($contents=$_);
214 if (-d $contents )
215 {
216 push (@dirlist, $contents);
217 }
218 }
219 close (DEFAULT_DIRLIST);
220 }
221
222
223 return @dirlist;
224}
225
226################################################################
227
228sub scan_configure ()
229{
230 die "aclocal: `configure.ac' or `configure.in' is required\n"
231 if !$configure_ac;
232
233 open (CONFIGURE, $configure_ac)
234 || die "aclocal: couldn't open `$configure_ac': $!\n";
235
236 # Make sure we include acinclude.m4 if it exists.
237 if (-f 'acinclude.m4')
238 {
239 &add_file ('acinclude.m4');
240 }
241
242 while (<CONFIGURE>)
243 {
244 # Remove comments from current line.
245 s/\bdnl\b.*$//;
246 s/\#.*$//;
247
248 # Search for things we know about. The "search" sub is
249 # constructed dynamically by scan_m4_files. The last
250 # parenthetical match makes sure we don't match things that
251 # look like macro assignments or AC_SUBSTs.
252 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
253 {
254 # Macro not found, but AM_ prefix found.
255 warn "aclocal: $configure_ac: $.: macro `$2' not found in library\n";
256 $exit_status = 1;
257 }
258 }
259
260 close (CONFIGURE);
261}
262
263################################################################
264
265# Check macros in acinclude.m4. If one is not used, warn.
266sub check_acinclude ()
267{
268 local ($key);
269
270 foreach $key (keys %map)
271 {
272 next unless $map{$key} eq 'acinclude.m4';
273 if (! $macro_seen{$key})
274 {
275 # FIXME: should print line number of acinclude.m4.
276 warn "aclocal: macro `$key' defined in acinclude.m4 but never used\n";
277 }
278 }
279}
280
281################################################################
282
283# Scan all the installed m4 files and construct a map.
284sub scan_m4_files (@)
285{
286 local (@dirlist) = @_;
287
288 # First, scan acinclude.m4 if it exists.
289 if (-f 'acinclude.m4')
290 {
291 $file_contents{'acinclude.m4'} = &scan_file ('acinclude.m4');
292 }
293
294 local ($m4dir);
295 foreach $m4dir (@dirlist)
296 {
297 opendir (DIR, $m4dir)
298 || die "aclocal: couldn't open directory `$m4dir': $!\n";
299 local ($file, $fullfile);
300 foreach $file (sort grep (! /^\./, readdir (DIR)))
301 {
302 # Only examine .m4 files.
303 next unless $file =~ /\.m4$/;
304
305 # Skip some files when running out of srcdir.
306 next if $file eq 'aclocal.m4';
307
308 $fullfile = $m4dir . '/' . $file;
309 $file_contents{$fullfile} = &scan_file ($fullfile);
310 }
311 closedir (DIR);
312 }
313
314 # Construct a new function that does the searching. We use a
315 # function (instead of just evaluating $search in the loop) so that
316 # "die" is correctly and easily propagated if run.
317 my $search = "sub search {\nmy \$found = 0;\n";
318 foreach my $key (reverse sort keys %map)
319 {
320 $search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { & add_macro ("' . $key
321 . '"); $found = 1; }' . "\n");
322 }
323 $search .= "return \$found;\n};\n";
324 eval $search;
325 die "internal error: $@\n search is $search" if $@;
326}
327
328################################################################
329
330# Add a macro to the output.
331sub add_macro ($)
332{
333 local ($macro) = @_;
334
335 # We want to ignore AC_ macros. However, if an AC_ macro is
336 # defined in (eg) acinclude.m4, then we want to make sure we mark
337 # it as seen.
338 return if $macro =~ /^AC_/ && ! defined $map{$macro};
339
340 if (! defined $map{$macro})
341 {
342 warn "aclocal: macro `$macro' required but not defined\n";
343 $exit_status = 1;
344 return;
345 }
346
347 print STDERR "aclocal: saw macro $macro\n" if $verbose;
348 $macro_seen{$macro} = 1;
349 &add_file ($map{$macro});
350}
351
352# Add a file to output.
353sub add_file ($)
354{
355 local ($file) = @_;
356
357 # Only add a file once.
358 return if ($file_seen{$file});
359 $file_seen{$file} = 1;
360
361 $output .= $file_contents{$file} . "\n";
362 my (@rlist);
363 foreach (split ("\n", $file_contents{$file}))
364 {
365 # Remove comments from current line.
366 s/\bdnl\b.*$//;
367 s/\#.*$//;
368
369 if (/$ac_require_rx/g)
370 {
371 push (@rlist, $1 || $2);
372 }
373
374 # The search function is constructed dynamically by
375 # scan_m4_files. The last parenthetical match makes sure we
376 # don't match things that look like macro assignments or
377 # AC_SUBSTs.
378 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
379 {
380 # Macro not found, but AM_ prefix found.
381 warn "aclocal: $configure_ac: $.: macro `$2' not found in library\n";
382 $exit_status = 1;
383 }
384 }
385
386 local ($macro);
387 foreach $macro (@rlist)
388 {
389 &add_macro ($macro);
390 }
391}
392
393# Scan a single M4 file. Return contents.
394sub scan_file ($)
395{
396 local ($file) = @_;
397
398 my $fh = new Automake::XFile $file;
399 my $contents = '';
400 while ($_ = $fh->getline)
401 {
402 # Ignore `##' lines.
403 next if /^##/;
404
405 $contents .= $_;
406
407 if (/$ac_defun_rx/)
408 {
409 if (! defined $map{$1 || $2})
410 {
411 $map{$1 || $2} = $file;
412 }
413
414 # Note: we used to give an error here if we saw a
415 # duplicated macro. However, this turns out to be
416 # extremely unpopular. It causes actual problems which
417 # are hard to work around, especially when you must
418 # mix-and-match tool versions.
419
420 print STDERR "aclocal: found macro $1 in $file: $.\n" if $verbose;
421 }
422 }
423
424 return $contents;
425}
426
427################################################################
428
429# Write output.
430sub write_aclocal ()
431{
432 return if ! length ($output);
433
434 print STDERR "aclocal: writing $output_file\n" if $verbose;
435
436 my $out = new Automake::XFile "> $output_file";
437
438# We used to print `# $output_file generated automatically etc.' But
439# this creates spurious differences when using autoreconf. Autoreconf
440# creates aclocal.m4t and then rename it to aclocal.m4, but the
441# rebuild rules generated by Automake create aclocal.m4 directly --
442# this would gives two ways to get the same file, with a different
443# name in the header.
444 print $out
445"# generated automatically by aclocal $VERSION -*- Autoconf -*-
446
447# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002
448# Free Software Foundation, Inc.
449# This file is free software; the Free Software Foundation
450# gives unlimited permission to copy and/or distribute it,
451# with or without modifications, as long as this notice is preserved.
452
453# This program is distributed in the hope that it will be useful,
454# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
455# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
456# PARTICULAR PURPOSE.
457
458$output";
459}
460
461### Setup "GNU" style for perl-mode and cperl-mode.
462## Local Variables:
463## perl-indent-level: 2
464## perl-continued-statement-offset: 2
465## perl-continued-brace-offset: 0
466## perl-brace-offset: 0
467## perl-brace-imaginary-offset: 0
468## perl-label-offset: -2
469## cperl-indent-level: 2
470## cperl-brace-offset: 0
471## cperl-continued-brace-offset: 0
472## cperl-label-offset: -2
473## cperl-extra-newline-before-brace: t
474## cperl-merge-trailing-else: nil
475## cperl-continued-statement-offset: 2
476## End:
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