5 eval 'case $# in 0) exec @PERL@ -S "$0";; *) exec @PERL@ -S "$0" "$@";; esac'
8 # aclocal - create aclocal.m4 by scanning configure.ac
10 # Copyright (C) 1996-2012 Free Software Foundation, Inc.
12 # This program is free software; you can redistribute it and/or modify
13 # it under the terms of the GNU General Public License as published by
14 # the Free Software Foundation; either version 2, or (at your option)
17 # This program is distributed in the hope that it will be useful,
18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 # GNU General Public License for more details.
22 # You should have received a copy of the GNU General Public License
23 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 # Written by Tom Tromey <tromey@redhat.com>, and
26 # Alexandre Duret-Lutz <adl@gnu.org>.
30 my $perllibdir = $ENV{'perllibdir'} || '@datadir@/@PACKAGE@-@APIVERSION@';
31 unshift @INC, (split '@PATH_SEPARATOR@', $perllibdir);
37 use Automake::General;
38 use Automake::Configure_ac;
39 use Automake::Channels;
40 use Automake::ChannelDefs;
42 use Automake::FileUtils;
48 # We do not operate in threaded mode.
51 # Include paths for searching macros. We search macros in this order:
52 # user-supplied directories first, then the directory containing the
53 # automake macros, and finally the system-wide directories for
55 # @user_includes can be augmented with -I.
56 # @automake_includes can be reset with the `--automake-acdir' option.
57 # @system_includes can be augmented with the `dirlist' file or the
58 # ACLOCAL_PATH environment variable, and reset with the `--system-acdir'
60 my @user_includes = ();
61 my @automake_includes = ("@datadir@/aclocal-$APIVERSION");
62 my @system_includes = ('@datadir@/aclocal');
64 # Whether we should copy M4 file in $user_includes[0].
73 # configure.ac or configure.in.
77 my $output_file = 'aclocal.m4';
82 # Modification time of the youngest dependency.
83 my $greatest_mtime = 0;
85 # Which macros have been seen.
88 # Remember the order into which we scanned the files.
89 # It's important to output the contents of aclocal.m4 in the opposite order.
90 # (Definitions in first files we have scanned should override those from
91 # later files. So they must appear last in the output.)
94 # Map macro names to file names.
97 # Ditto, but records the last definition of each macro as returned by --trace.
98 my %map_traced_defs = ();
100 # Map basenames to macro names.
103 # Map file names to file contents.
104 my %file_contents = ();
106 # Map file names to file types.
108 use constant FT_USER => 1;
109 use constant FT_AUTOMAKE => 2;
110 use constant FT_SYSTEM => 3;
112 # Map file names to included files (transitively closed).
113 my %file_includes = ();
115 # Files which have already been added.
118 # Files that have already been scanned.
119 my %scanned_configure_dep = ();
121 # Serial numbers, for files that have one.
122 # The key is the basename of the file,
123 # the value is the serial number represented as a list.
126 # Matches a macro definition.
127 # AC_DEFUN([macroname], ...)
129 # AC_DEFUN(macroname, ...)
130 # When macroname is `['-quoted , we accept any character in the name,
131 # except `]'. Otherwise macroname stops on the first `]', `,', `)',
132 # or `\n' encountered.
134 "(?:AU_ALIAS|A[CU]_DEFUN|AC_DEFUN_ONCE)\\((?:\\[([^]]+)\\]|([^],)\n]+))";
136 # Matches an AC_REQUIRE line.
137 my $ac_require_rx = "AC_REQUIRE\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
139 # Matches an m4_include line.
140 my $m4_include_rx = "(m4_|m4_s|s)include\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
142 # Match a serial number.
143 my $serial_line_rx = '^#\s*serial\s+(\S*)';
144 my $serial_number_rx = '^\d+(?:\.\d+)*$';
147 # Set by trace_used_macros.
150 # If set, names a temporary file that must be erased on abnormal exit.
153 ################################################################
155 # Erase temporary file ERASE_ME. Handle signals.
162 verb "caught SIG$sig, bailing out";
164 if (defined $erase_me && -e $erase_me && !unlink ($erase_me))
166 fatal "could not remove `$erase_me': $!";
170 # reraise default handler.
173 $SIG{$sig} = 'DEFAULT';
178 $SIG{'INT'} = $SIG{'TERM'} = $SIG{'QUIT'} = $SIG{'HUP'} = 'unlink_tmp';
186 if -d $dir or eval { File::Path::mkpath $dir };
188 $@ =~ s/\s+at\s.*\bline\s\d+.*$//;
189 fatal "could not create directory '$dir': $@";
192 # Check macros in acinclude.m4. If one is not used, warn.
193 sub check_acinclude ()
195 foreach my $key (keys %map)
197 # FIXME: should print line number of acinclude.m4.
198 msg ('syntax', "warning: macro `$key' defined in "
199 . "acinclude.m4 but never used")
200 if $map{$key} eq 'acinclude.m4' && ! exists $macro_seen{$key};
210 %map_traced_defs = ();
215 %scanned_configure_dep = ();
221 # install_file ($SRC, $DESTDIR)
222 sub install_file ($$)
224 my ($src, $destdir) = @_;
225 my $dest = $destdir . "/" . basename ($src);
228 verb "installing $src to $dest";
231 || !exists $file_contents{$dest}
232 || $file_contents{$src} ne $file_contents{$dest})
236 msg 'note', "overwriting `$dest' with `$src'";
241 msg 'note', "installing `$dest' from `$src'";
246 if (! defined $diff_dest)
248 # $dest does not exist. We create an empty one just to
249 # run diff, and we erase it afterward. Using the real
250 # the destination file (rather than a temporary file) is
251 # good when diff is run with options that display the
254 # If creating $dest fails, fall back to /dev/null. At
255 # least one diff implementation (Tru64's) cannot deal
256 # with /dev/null. However working around this is not
257 # worth the trouble since nobody run aclocal on a
258 # read-only tree anyway.
260 my $f = new IO::File "> $dest";
264 $diff_dest = '/dev/null';
272 my @cmd = (@diff_command, $diff_dest, $src);
274 verb "running: @cmd";
275 my $res = system (@cmd);
276 Automake::FileUtils::handle_exec_errors "@cmd", 1
283 xsystem ('cp', $src, $dest);
288 # Compare two lists of numbers.
289 sub list_compare (\@\@)
297 return (0 == @r) ? 0 : -1;
303 elsif ($l[0] < $r[0])
307 elsif ($l[0] > $r[0])
316 ################################################################
318 # scan_m4_dirs($TYPE, @DIRS)
319 # --------------------------
320 # Scan all M4 files installed in @DIRS for new macro definitions.
321 # Register each file as of type $TYPE (one of the FT_* constants).
322 my $first_user_m4dir = 1;
323 sub scan_m4_dirs ($@)
325 my ($type, @dirlist) = @_;
327 foreach my $m4dir (@dirlist)
329 if (! opendir (DIR, $m4dir))
331 if ($install && $type == FT_USER && $first_user_m4dir)
333 # We will try to create this directory later, so don't
334 # complain if it doesn't exist.
335 # TODO: maybe we should avoid complaining only if errno
337 $first_user_m4dir = 0;
340 fatal "couldn't open directory '$m4dir': $!";
343 # We reverse the directory contents so that foo2.m4 gets
344 # used in preference to foo1.m4.
345 foreach my $file (reverse sort grep (! /^\./, readdir (DIR)))
347 # Only examine .m4 files.
348 next unless $file =~ /\.m4$/;
350 # Skip some files when running out of srcdir.
351 next if $file eq 'aclocal.m4';
353 my $fullfile = File::Spec->canonpath ("$m4dir/$file");
354 &scan_file ($type, $fullfile, 'aclocal');
360 # Scan all the installed m4 files and construct a map.
363 # First, scan configure.ac. It may contain macro definitions,
364 # or may include other files that define macros.
365 &scan_file (FT_USER, $configure_ac, 'aclocal');
367 # Then, scan acinclude.m4 if it exists.
368 if (-f 'acinclude.m4')
370 &scan_file (FT_USER, 'acinclude.m4', 'aclocal');
373 # Finally, scan all files in our search paths.
374 scan_m4_dirs (FT_USER, @user_includes);
375 scan_m4_dirs (FT_AUTOMAKE, @automake_includes);
376 scan_m4_dirs (FT_SYSTEM, @system_includes);
378 # Construct a new function that does the searching. We use a
379 # function (instead of just evaluating $search in the loop) so that
380 # "die" is correctly and easily propagated if run.
381 my $search = "sub search {\nmy \$found = 0;\n";
382 foreach my $key (reverse sort keys %map)
384 $search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { & add_macro ("' . $key
385 . '"); $found = 1; }' . "\n");
387 $search .= "return \$found;\n};\n";
389 prog_error "$@\n search is $search" if $@;
392 ################################################################
394 # Add a macro to the output.
399 # Ignore unknown required macros. Either they are not really
400 # needed (e.g., a conditional AC_REQUIRE), in which case aclocal
401 # should be quiet, or they are needed and Autoconf itself will
402 # complain when we trace for macro usage later.
403 return unless defined $map{$macro};
405 verb "saw macro $macro";
406 $macro_seen{$macro} = 1;
407 &add_file ($map{$macro});
410 # scan_configure_dep ($file)
411 # --------------------------
412 # Scan a configure dependency (configure.ac, or separate m4 files)
413 # for uses of known macros and AC_REQUIREs of possibly unknown macros.
414 # Recursively scan m4_included files.
415 sub scan_configure_dep ($)
418 # Do not scan a file twice.
420 if exists $scanned_configure_dep{$file};
421 $scanned_configure_dep{$file} = 1;
423 my $mtime = mtime $file;
424 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
426 my $contents = exists $file_contents{$file} ?
427 $file_contents{$file} : contents $file;
432 foreach (split ("\n", $contents))
435 # Remove comments from current line.
438 # Avoid running all the following regexes on white lines.
441 while (/$m4_include_rx/go)
443 my $ifile = $2 || $3;
444 # Skip missing `sinclude'd files.
445 next if $1 ne 'm4_' && ! -f $ifile;
449 while (/$ac_require_rx/go)
451 push (@rlist, $1 || $2);
454 # The search function is constructed dynamically by
455 # scan_m4_files. The last parenthetical match makes sure we
456 # don't match things that look like macro assignments or
458 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
460 # Macro not found, but AM_ prefix found.
461 # Make this just a warning, because we do not know whether
462 # the macro is actually used (it could be called conditionally).
463 msg ('unsupported', "$file:$line",
464 "warning: macro `$2' not found in library");
468 add_macro ($_) foreach (@rlist);
469 &scan_configure_dep ($_) foreach @ilist;
474 # Add $FILE to output.
479 # Only add a file once.
480 return if ($file_added{$file});
481 $file_added{$file} = 1;
483 scan_configure_dep $file;
486 # Point to the documentation for underquoted AC_DEFUN only once.
487 my $underquoted_manual_once = 0;
489 # scan_file ($TYPE, $FILE, $WHERE)
490 # --------------------------------
491 # Scan a single M4 file ($FILE), and all files it includes.
492 # Return the list of included files.
493 # $TYPE is one of FT_USER, FT_AUTOMAKE, or FT_SYSTEM, depending
494 # on where the file comes from.
495 # $WHERE is the location to use in the diagnostic if the file
499 my ($type, $file, $where) = @_;
500 my $basename = basename $file;
502 # Do not scan the same file twice.
503 return @{$file_includes{$file}} if exists $file_includes{$file};
504 # Prevent potential infinite recursion (if two files include each other).
505 return () if exists $file_contents{$file};
507 unshift @file_order, $file;
509 $file_type{$file} = $type;
511 fatal "$where: file `$file' does not exist" if ! -e $file;
513 my $fh = new Automake::XFile $file;
520 my $serial_older = 0;
522 while ($_ = $fh->getline)
530 if ($line =~ /$serial_line_rx/go)
533 if ($number !~ /$serial_number_rx/go)
535 msg ('syntax', "$file:$.",
536 "warning: ill-formed serial number `$number', "
537 . "expecting a version string with only digits and dots");
541 # aclocal removes all definitions from M4 file with the
542 # same basename if a greater serial number is found.
543 # Encountering a serial after some macros will undefine
545 msg ('syntax', "$file:$.",
546 'the serial number must appear before any macro definition');
548 # We really care about serials only for non-automake macros
549 # and when --install is used. But the above diagnostics are
550 # made regardless of this, because not using --install is
551 # not a reason not the fix macro files.
552 elsif ($install && $type != FT_AUTOMAKE)
555 my @new = split (/\./, $number);
557 verb "$file:$.: serial $number";
559 if (!exists $serial{$basename}
560 || list_compare (@new, @{$serial{$basename}}) > 0)
562 # Delete any definition we knew from the old macro.
563 foreach my $def (@{$invmap{$basename}})
565 verb "$file:$.: ignoring previous definition of $def";
568 $invmap{$basename} = [];
569 $serial{$basename} = \@new;
578 # Remove comments from current line.
579 # Do not do it earlier, because the serial line is a comment.
580 $line =~ s/\bdnl\b.*$//;
583 while ($line =~ /$ac_defun_rx/go)
588 msg ('syntax', "$file:$.", "warning: underquoted definition of $2"
589 . "\n run info '(automake)Extending aclocal'\n"
590 . " or see http://www.gnu.org/software/automake/manual/"
591 . "automake.html#Extending-aclocal")
592 unless $underquoted_manual_once;
593 $underquoted_manual_once = 1;
596 # If this macro does not have a serial and we have already
597 # seen a macro with the same basename earlier, we should
598 # ignore the macro (don't exit immediately so we can still
599 # diagnose later #serial numbers and underquoted macros).
600 $serial_older ||= ($type != FT_AUTOMAKE
601 && !$serial_seen && exists $serial{$basename});
603 my $macro = $1 || $2;
604 if (!$serial_older && !defined $map{$macro})
606 verb "found macro $macro in $file: $.";
607 $map{$macro} = $file;
608 push @{$invmap{$basename}}, $macro;
612 # Note: we used to give an error here if we saw a
613 # duplicated macro. However, this turns out to be
614 # extremely unpopular. It causes actual problems which
615 # are hard to work around, especially when you must
616 # mix-and-match tool versions.
617 verb "ignoring macro $macro in $file: $.";
621 while ($line =~ /$m4_include_rx/go)
623 my $ifile = $2 || $3;
624 # Skip missing `sinclude'd files.
625 next if $1 ne 'm4_' && ! -f $ifile;
626 push (@inc_files, $ifile);
627 $inc_lines{$ifile} = $.;
631 # Ignore any file that has an old serial (or no serial if we know
632 # another one with a serial).
635 ($type != FT_AUTOMAKE && !$serial_seen && exists $serial{$basename}));
637 $file_contents{$file} = $contents;
639 # For some reason I don't understand, it does not work
640 # to do `map { scan_file ($_, ...) } @inc_files' below.
641 # With Perl 5.8.2 it undefines @inc_files.
642 my @copy = @inc_files;
643 my @all_inc_files = (@inc_files,
644 map { scan_file ($type, $_,
645 "$file:$inc_lines{$_}") } @copy);
646 $file_includes{$file} = \@all_inc_files;
647 return @all_inc_files;
650 # strip_redundant_includes (%FILES)
651 # ---------------------------------
652 # Each key in %FILES is a file that must be present in the output.
653 # However some of these files might already include other files in %FILES,
654 # so there is no point in including them another time.
655 # This removes items of %FILES which are already included by another file.
656 sub strip_redundant_includes (%)
660 # Always include acinclude.m4, even if it does not appear to be used.
661 $files{'acinclude.m4'} = 1 if -f 'acinclude.m4';
662 # File included by $configure_ac are redundant.
663 $files{$configure_ac} = 1;
665 # Files at the end of @file_order should override those at the beginning,
666 # so it is important to preserve these trailing files. We can remove
667 # a file A if it is going to be output before a file B that includes
668 # file A, not the converse.
669 foreach my $file (reverse @file_order)
671 next unless exists $files{$file};
672 foreach my $ifile (@{$file_includes{$file}})
674 next unless exists $files{$ifile};
675 delete $files{$ifile};
676 verb "$ifile is already included by $file";
680 # configure.ac is implicitly included.
681 delete $files{$configure_ac};
686 sub trace_used_macros ()
688 my %files = map { $map{$_} => 1 } keys %macro_seen;
689 %files = strip_redundant_includes %files;
691 my $traces = ($ENV{AUTOM4TE} || '@am_AUTOM4TE@');
692 $traces .= " --language Autoconf-without-aclocal-m4 ";
693 # All candidate files.
694 $traces .= join (' ',
696 (grep { exists $files{$_} } @file_order))) . " ";
697 # All candidate macros.
698 $traces .= join (' ',
699 (map { "--trace='$_:\$f::\$n::\$1'" }
703 '_AM_AUTOCONF_VERSION')),
704 # Do not trace $1 for all other macros as we do
705 # not need it and it might contains harmful
706 # characters (like newlines).
707 (map { "--trace='$_:\$f::\$n'" } (keys %macro_seen)));
709 verb "running $traces $configure_ac";
711 my $tracefh = new Automake::XFile ("$traces $configure_ac |");
715 while ($_ = $tracefh->getline)
718 my ($file, $macro, $arg1) = split (/::/);
720 $traced{$macro} = 1 if exists $macro_seen{$macro};
722 $map_traced_defs{$arg1} = $file
723 if ($macro eq 'AC_DEFUN'
724 || $macro eq 'AC_DEFUN_ONCE'
725 || $macro eq 'AU_DEFUN');
727 $ac_version = $arg1 if $macro eq '_AM_AUTOCONF_VERSION';
735 sub scan_configure ()
737 # Make sure we include acinclude.m4 if it exists.
738 if (-f 'acinclude.m4')
740 add_file ('acinclude.m4');
742 scan_configure_dep ($configure_ac);
745 ################################################################
748 # Return 0 iff some files were installed locally.
749 sub write_aclocal ($@)
751 my ($output_file, @macros) = @_;
755 # Get the list of files containing definitions for the macros used.
756 # (Filter out unused macro definitions with $map_traced_defs. This
757 # can happen when an Autoconf macro is conditionally defined:
758 # aclocal sees the potential definition, but this definition is
759 # actually never processed and the Autoconf implementation is used
764 if (exists $map_traced_defs{$m}
765 && $map{$m} eq $map_traced_defs{$m});
767 # Do not explicitly include a file that is already indirectly included.
768 %files = strip_redundant_includes %files;
772 for my $file (grep { exists $files{$_} } @file_order)
774 # Check the time stamp of this file, and of all files it includes.
775 for my $ifile ($file, @{$file_includes{$file}})
777 my $mtime = mtime $ifile;
778 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
781 # If the file to add looks like outside the project, copy it
782 # to the output. The regex catches filenames starting with
783 # things like `/', `\', or `c:\'.
784 if ($file_type{$file} != FT_USER
785 || $file =~ m,^(?:\w:)?[\\/],)
787 if (!$install || $file_type{$file} != FT_SYSTEM)
789 # Copy the file into aclocal.m4.
790 $output .= $file_contents{$file} . "\n";
794 # Install the file (and any file it includes).
796 for my $ifile (@{$file_includes{$file}}, $file)
798 install_file ($ifile, $user_includes[0]);
805 # Otherwise, simply include the file.
806 $output .= "m4_include([$file])\n";
812 verb "running aclocal anew, because some files were installed locally";
816 # Nothing to output?!
817 # FIXME: Shouldn't we diagnose this?
818 return 1 if ! length ($output);
822 # Do not use "$output_file" here for the same reason we do not
823 # use it in the header below. autom4te will output the name of
824 # the file in the diagnostic anyway.
825 $output = "m4_ifndef([AC_AUTOCONF_VERSION],
826 [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
827 m4_if(m4_defn([AC_AUTOCONF_VERSION]), [$ac_version],,
828 [m4_warning([this file was generated for autoconf $ac_version.
829 You have another version of autoconf. It may work, but is not guaranteed to.
830 If you have problems, you may need to regenerate the build system entirely.
831 To do so, use the procedure documented by the package, typically `autoreconf'.])])
836 # We used to print `# $output_file generated automatically etc.' But
837 # this creates spurious differences when using autoreconf. Autoreconf
838 # creates aclocal.m4t and then rename it to aclocal.m4, but the
839 # rebuild rules generated by Automake create aclocal.m4 directly --
840 # this would gives two ways to get the same file, with a different
841 # name in the header.
842 $output = "# generated automatically by aclocal $VERSION -*- Autoconf -*-
844 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
845 # 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation,
847 # This file is free software; the Free Software Foundation
848 # gives unlimited permission to copy and/or distribute it,
849 # with or without modifications, as long as this notice is preserved.
851 # This program is distributed in the hope that it will be useful,
852 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
853 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
854 # PARTICULAR PURPOSE.
858 # We try not to update $output_file unless necessary, because
859 # doing so invalidate Autom4te's cache and therefore slows down
860 # tools called after aclocal.
862 # We need to overwrite $output_file in the following situations.
863 # * The --force option is in use.
864 # * One of the dependencies is younger.
865 # (Not updating $output_file in this situation would cause
866 # make to call aclocal in loop.)
867 # * The contents of the current file are different from what
870 && $greatest_mtime < mtime ($output_file)
871 && $output eq contents ($output_file))
873 verb "$output_file unchanged";
877 verb "writing $output_file";
881 if (-e $output_file && !unlink $output_file)
883 fatal "could not remove `$output_file': $!";
885 my $out = new Automake::XFile "> $output_file";
891 ################################################################
893 # Print usage and exit.
898 print "Usage: aclocal [OPTIONS] ...
900 Generate `aclocal.m4' by scanning `configure.ac' or `configure.in'
903 --automake-acdir=DIR directory holding automake-provided m4 files
904 --system-acdir=DIR directory holding third-party system-wide files
905 --diff[=COMMAND] run COMMAND [diff -u] on M4 files that would be
906 changed (implies --install and --dry-run)
907 --dry-run pretend to, but do not actually update any file
908 --force always update output file
909 --help print this help, then exit
910 -I DIR add directory to search list for .m4 files
911 --install copy third-party files to the first -I directory
912 --output=FILE put output in FILE (default aclocal.m4)
913 --print-ac-dir print name of directory holding system-wide
914 third-party m4 files, then exit
915 --verbose don't be silent
916 --version print version number, then exit
917 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
919 Warning categories include:
920 `syntax' dubious syntactic constructs (default)
921 `unsupported' unknown macros (default)
922 `all' all the warnings (default)
923 `no-CATEGORY' turn off warnings in CATEGORY
924 `none' turn off all the warnings
925 `error' treat warnings as errors
927 " . 'Report bugs to <@PACKAGE_BUGREPORT@>.
928 GNU Automake home page: <@PACKAGE_URL@>.
929 General help using GNU software: <http://www.gnu.org/gethelp/>.
935 # Print version and exit.
939 aclocal (GNU $PACKAGE) $VERSION
940 Copyright (C) 2011 Free Software Foundation, Inc.
941 License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
942 This is free software: you are free to change and redistribute it.
943 There is NO WARRANTY, to the extent permitted by law.
945 Written by Tom Tromey <tromey\@redhat.com>
946 and Alexandre Duret-Lutz <adl\@gnu.org>.
951 # Using --acdir overrides both the automake (versioned) directory and
952 # the public (unversioned) system directory. This usage is obsolete.
953 sub handle_acdir_option ($$)
955 msg 'obsolete', '', "`--acdir' is deprecated\n";
956 @system_includes = ($_[1]);
957 @automake_includes = ();
960 # Parse command line.
961 sub parse_arguments ()
963 my $print_and_exit = 0;
968 'help' => sub { usage(0); },
969 'version' => \&version,
970 'acdir=s' => \&handle_acdir_option,
971 'system-acdir=s' => sub { shift; @system_includes = @_; },
972 'automake-acdir=s' => sub { shift; @automake_includes = @_; },
973 'diff:s' => \$diff_command,
974 'dry-run' => \$dry_run,
975 'force' => \$force_output,
976 'I=s' => \@user_includes,
977 'install' => \$install,
978 'output=s' => \$output_file,
979 'print-ac-dir' => \$print_and_exit,
980 'verbose' => sub { setup_channel 'verb', silent => 0; },
981 'W|warnings=s' => \&parse_warnings,
984 use Automake::Getopt ();
985 Automake::Getopt::parse_options %cli_options;
989 print "@system_includes\n";
993 if (defined $diff_command)
995 $diff_command = 'diff -u' if $diff_command eq '';
996 @diff_command = split (' ', $diff_command);
1001 if ($install && !@user_includes)
1003 fatal ("--install should copy macros in the directory indicated by the"
1004 . "\nfirst -I option, but no -I was supplied.");
1007 # Finally, adds any directory listed in the `dirlist' file.
1008 if (open (DIRLIST, "$system_includes[0]/dirlist"))
1014 # strip off newlines and end-of-line comments
1017 foreach my $dir (glob)
1019 push (@system_includes, $dir) if -d $dir;
1026 # Add any directory listed in the `ACLOCAL_PATH' environment variable
1027 # to the list of system include directories.
1028 sub parse_ACLOCAL_PATH ()
1030 return if not defined $ENV{"ACLOCAL_PATH"};
1031 # Directories in ACLOCAL_PATH should take precedence over system
1032 # directories, so we use unshift. However, directories that
1033 # come first in ACLOCAL_PATH take precedence over directories
1034 # coming later, which is why the result of split is reversed.
1035 foreach my $dir (reverse split /:/, $ENV{"ACLOCAL_PATH"})
1037 unshift (@system_includes, $dir) if $dir ne '' && -d $dir;
1041 ################################################################
1043 parse_WARNINGS; # Parse the WARNINGS environment variable.
1046 $configure_ac = require_configure_ac;
1048 # We may have to rerun aclocal if some file have been installed, but
1049 # it should not happen more than once. The reason we must run again
1050 # is that once the file has been moved from /usr/share/aclocal/ to the
1051 # local m4/ directory it appears at a new place in the search path,
1052 # hence it should be output at a different position in aclocal.m4. If
1053 # we did not rerun aclocal, the next run of aclocal would produce a
1054 # different aclocal.m4.
1059 prog_error "Too many loops." if $loop > 2;
1065 my %macro_traced = trace_used_macros;
1066 last if write_aclocal ($output_file, keys %macro_traced);
1073 ### Setup "GNU" style for perl-mode and cperl-mode.
1075 ## perl-indent-level: 2
1076 ## perl-continued-statement-offset: 2
1077 ## perl-continued-brace-offset: 0
1078 ## perl-brace-offset: 0
1079 ## perl-brace-imaginary-offset: 0
1080 ## perl-label-offset: -2
1081 ## cperl-indent-level: 2
1082 ## cperl-brace-offset: 0
1083 ## cperl-continued-brace-offset: 0
1084 ## cperl-label-offset: -2
1085 ## cperl-extra-newline-before-brace: t
1086 ## cperl-merge-trailing-else: nil
1087 ## cperl-continued-statement-offset: 2