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, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
11 # 2005, 2006 Free Software Foundation, Inc.
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)
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.
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
28 # Written by Tom Tromey <tromey@redhat.com>, and
29 # Alexandre Duret-Lutz <adl@gnu.org>.
33 my $perllibdir = $ENV{'perllibdir'} || '@datadir@/@PACKAGE@-@APIVERSION@';
34 unshift @INC, (split '@PATH_SEPARATOR@', $perllibdir);
40 use Automake::General;
41 use Automake::Configure_ac;
42 use Automake::Channels;
43 use Automake::ChannelDefs;
45 use Automake::FileUtils;
52 # Include paths for searching macros. We search macros in this order:
53 # user-supplied directories first, then the directory containing the
54 # automake macros, and finally the system-wide directories for
55 # third-party macro. @user_includes can be augmented with -I.
56 # @system_includes can be augmented with the `dirlist' file. Also
57 # --acdir will reset both @automake_includes and @system_includes.
58 my @user_includes = ();
59 my @automake_includes = ("@datadir@/aclocal-$APIVERSION");
60 my @system_includes = ('@datadir@/aclocal');
62 # Whether we should copy M4 file in $user_includes[0].
71 # configure.ac or configure.in.
75 my $output_file = 'aclocal.m4';
80 # Modification time of the youngest dependency.
81 my $greatest_mtime = 0;
83 # Which macros have been seen.
86 # Remember the order into which we scanned the files.
87 # It's important to output the contents of aclocal.m4 in the opposite order.
88 # (Definitions in first files we have scanned should override those from
89 # later files. So they must appear last in the output.)
92 # Map macro names to file names.
95 # Ditto, but records the last definition of each macro as returned by --trace.
96 my %map_traced_defs = ();
98 # Map basenames to macro names.
101 # Map file names to file contents.
102 my %file_contents = ();
104 # Map file names to file types.
106 use constant FT_USER => 1;
107 use constant FT_AUTOMAKE => 2;
108 use constant FT_SYSTEM => 3;
110 # Map file names to included files (transitively closed).
111 my %file_includes = ();
113 # Files which have already been added.
116 # Files that have already been scanned.
117 my %scanned_configure_dep = ();
119 # Serial numbers, for files that have one.
120 # The key is the basename of the file,
121 # the value is the serial number represented as a list.
124 # Matches a macro definition.
125 # AC_DEFUN([macroname], ...)
127 # AC_DEFUN(macroname, ...)
128 # When macroname is `['-quoted , we accept any character in the name,
129 # except `]'. Otherwise macroname stops on the first `]', `,', `)',
130 # or `\n' encountered.
132 "(?:AU_ALIAS|A[CU]_DEFUN|AC_DEFUN_ONCE)\\((?:\\[([^]]+)\\]|([^],)\n]+))";
134 # Matches an AC_REQUIRE line.
135 my $ac_require_rx = "AC_REQUIRE\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
137 # Matches an m4_include line.
138 my $m4_include_rx = "(m4_|m4_s|s)include\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
140 # Match a serial number.
141 my $serial_line_rx = '^#\s*serial\s+(\S*)';
142 my $serial_number_rx = '^\d+(?:\.\d+)*$';
144 ################################################################
146 # Check macros in acinclude.m4. If one is not used, warn.
147 sub check_acinclude ()
149 foreach my $key (keys %map)
151 # FIXME: should print line number of acinclude.m4.
152 msg ('syntax', "warning: macro `$key' defined in "
153 . "acinclude.m4 but never used")
154 if $map{$key} eq 'acinclude.m4' && ! exists $macro_seen{$key};
164 %map_traced_defs = ();
169 %scanned_configure_dep = ();
175 # install_file ($SRC, $DEST)
176 sub install_file ($$)
178 my ($src, $dest) = @_;
179 my $diff_dest = $dest;
182 || !exists $file_contents{$dest}
183 || $file_contents{$src} ne $file_contents{$dest})
187 msg 'note', "overwriting `$dest' with `$src'";
191 msg 'note', "installing `$dest' from `$src'";
192 $diff_dest = '/dev/null';
197 my @cmd = (@diff_command, $diff_dest, $src);
199 verb "running: @cmd";
200 my $res = system (@cmd);
201 Automake::FileUtils::handle_exec_errors "@cmd", 1
206 xsystem ('cp', $src, $dest);
211 # Compare two lists of numbers.
212 sub list_compare (\@\@)
220 return (0 == @r) ? 0 : -1;
226 elsif ($l[0] < $r[0])
230 elsif ($l[0] > $r[0])
239 ################################################################
241 # scan_m4_dirs($TYPE, @DIRS)
242 # --------------------------
243 # Scan all M4 files installed in @DIRS for new macro definitions.
244 # Register each file as of type $TYPE (one of the FT_* constants).
245 sub scan_m4_dirs ($@)
247 my ($type, @dirlist) = @_;
249 foreach my $m4dir (@dirlist)
251 if (! opendir (DIR, $m4dir))
253 fatal "couldn't open directory `$m4dir': $!";
256 # We reverse the directory contents so that foo2.m4 gets
257 # used in preference to foo1.m4.
258 foreach my $file (reverse sort grep (! /^\./, readdir (DIR)))
260 # Only examine .m4 files.
261 next unless $file =~ /\.m4$/;
263 # Skip some files when running out of srcdir.
264 next if $file eq 'aclocal.m4';
266 my $fullfile = File::Spec->canonpath ("$m4dir/$file");
267 &scan_file ($type, $fullfile, 'aclocal');
273 # Scan all the installed m4 files and construct a map.
276 # First, scan configure.ac. It may contain macro definitions,
277 # or may include other files that define macros.
278 &scan_file (FT_USER, $configure_ac, 'aclocal');
280 # Then, scan acinclude.m4 if it exists.
281 if (-f 'acinclude.m4')
283 &scan_file (FT_USER, 'acinclude.m4', 'aclocal');
286 # Finally, scan all files in our search paths.
287 scan_m4_dirs (FT_USER, @user_includes);
288 scan_m4_dirs (FT_AUTOMAKE, @automake_includes);
289 scan_m4_dirs (FT_SYSTEM, @system_includes);
291 # Construct a new function that does the searching. We use a
292 # function (instead of just evaluating $search in the loop) so that
293 # "die" is correctly and easily propagated if run.
294 my $search = "sub search {\nmy \$found = 0;\n";
295 foreach my $key (reverse sort keys %map)
297 $search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { & add_macro ("' . $key
298 . '"); $found = 1; }' . "\n");
300 $search .= "return \$found;\n};\n";
302 prog_error "$@\n search is $search" if $@;
305 ################################################################
307 # Add a macro to the output.
312 # Ignore unknown required macros. Either they are not really
313 # needed (e.g., a conditional AC_REQUIRE), in which case aclocal
314 # should be quiet, or they are needed and Autoconf itself will
315 # complain when we trace for macro usage later.
316 return unless defined $map{$macro};
318 verb "saw macro $macro";
319 $macro_seen{$macro} = 1;
320 &add_file ($map{$macro});
323 # scan_configure_dep ($file)
324 # --------------------------
325 # Scan a configure dependency (configure.ac, or separate m4 files)
326 # for uses of known macros and AC_REQUIREs of possibly unknown macros.
327 # Recursively scan m4_included files.
328 sub scan_configure_dep ($)
331 # Do not scan a file twice.
333 if exists $scanned_configure_dep{$file};
334 $scanned_configure_dep{$file} = 1;
336 my $mtime = mtime $file;
337 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
339 my $contents = exists $file_contents{$file} ?
340 $file_contents{$file} : contents $file;
345 foreach (split ("\n", $contents))
348 # Remove comments from current line.
351 # Avoid running all the following regexes on white lines.
354 while (/$m4_include_rx/go)
356 my $ifile = $2 || $3;
357 # Skip missing `sinclude'd files.
358 next if $1 ne 'm4_' && ! -f $ifile;
362 while (/$ac_require_rx/go)
364 push (@rlist, $1 || $2);
367 # The search function is constructed dynamically by
368 # scan_m4_files. The last parenthetical match makes sure we
369 # don't match things that look like macro assignments or
371 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
373 # Macro not found, but AM_ prefix found.
374 # Make this just a warning, because we do not know whether
375 # the macro is actually used (it could be called conditionally).
376 msg ('unsupported', "$file:$line",
377 "warning: macro `$2' not found in library");
381 add_macro ($_) foreach (@rlist);
382 &scan_configure_dep ($_) foreach @ilist;
387 # Add $FILE to output.
392 # Only add a file once.
393 return if ($file_added{$file});
394 $file_added{$file} = 1;
396 scan_configure_dep $file;
399 # Point to the documentation for underquoted AC_DEFUN only once.
400 my $underquoted_manual_once = 0;
402 # scan_file ($TYPE, $FILE, $WHERE)
403 # --------------------------------
404 # Scan a single M4 file ($FILE), and all files it includes.
405 # Return the list of included files.
406 # $TYPE is one of FT_USER, FT_AUTOMAKE, or FT_SYSTEM, depending
407 # on where the file comes from.
408 # $WHERE is the location to use in the diagnostic if the file
412 my ($type, $file, $where) = @_;
413 my $basename = basename $file;
415 # Do not scan the same file twice.
416 return @{$file_includes{$file}} if exists $file_includes{$file};
417 # Prevent potential infinite recursion (if two files include each other).
418 return () if exists $file_contents{$file};
420 unshift @file_order, $file;
422 $file_type{$file} = $type;
424 fatal "$where: file `$file' does not exist" if ! -e $file;
426 my $fh = new Automake::XFile $file;
433 my $serial_older = 0;
435 while ($_ = $fh->getline)
443 if ($line =~ /$serial_line_rx/go)
446 if ($number !~ /$serial_number_rx/go)
448 msg ('syntax', "$file:$.",
449 "warning: ill-formed serial number `$number', "
450 . "expecting a version string with only digits and dots");
454 # aclocal removes all definitions from M4 file with the
455 # same basename if a greater serial number is found.
456 # Encountering a serial after some macros will undefine
458 msg ('syntax', "$file:$.",
459 'the serial number must appear before any macro definition');
461 # We really care about serials only for non-automake macros
462 # and when --install is used. But the above diagnostics are
463 # made regardless of this, because not using --install is
464 # not a reason not the fix macro files.
465 elsif ($install && $type != FT_AUTOMAKE)
468 my @new = split (/\./, $number);
470 verb "$file:$.: serial $number";
472 if (!exists $serial{$basename}
473 || list_compare (@new, @{$serial{$basename}}) > 0)
475 # Delete any definition we knew from the old macro.
476 foreach my $def (@{$invmap{$basename}})
478 verb "$file:$.: ignoring previous definition of $def";
481 $invmap{$basename} = [];
482 $serial{$basename} = \@new;
491 # Remove comments from current line.
492 # Do not do it earlier, because the serial line is a comment.
493 $line =~ s/\bdnl\b.*$//;
496 while ($line =~ /$ac_defun_rx/go)
501 msg ('syntax', "$file:$.", "warning: underquoted definition of $2"
502 . "\n run info '(automake)Extending aclocal'\n"
503 . " or see http://sources.redhat.com/automake/"
504 . "automake.html#Extending-aclocal")
505 unless $underquoted_manual_once;
506 $underquoted_manual_once = 1;
509 # If this macro does not have a serial and we have already
510 # seen a macro with the same basename earlier, we should
511 # ignore the macro (don't exit immediately so we can still
512 # diagnose later #serial numbers and underquoted macros).
513 $serial_older ||= ($type != FT_AUTOMAKE
514 && !$serial_seen && exists $serial{$basename});
516 my $macro = $1 || $2;
517 if (!$serial_older && !defined $map{$macro})
519 verb "found macro $macro in $file: $.";
520 $map{$macro} = $file;
521 push @{$invmap{$basename}}, $macro;
525 # Note: we used to give an error here if we saw a
526 # duplicated macro. However, this turns out to be
527 # extremely unpopular. It causes actual problems which
528 # are hard to work around, especially when you must
529 # mix-and-match tool versions.
530 verb "ignoring macro $macro in $file: $.";
534 while ($line =~ /$m4_include_rx/go)
536 my $ifile = $2 || $3;
537 # Skip missing `sinclude'd files.
538 next if $1 ne 'm4_' && ! -f $ifile;
539 push (@inc_files, $ifile);
540 $inc_lines{$ifile} = $.;
544 # Ignore any file that has an old serial (or no serial if we know
545 # another one with a serial).
548 ($type != FT_AUTOMAKE && !$serial_seen && exists $serial{$basename}));
550 $file_contents{$file} = $contents;
552 # For some reason I don't understand, it does not work
553 # to do `map { scan_file ($_, ...) } @inc_files' below.
554 # With Perl 5.8.2 it undefines @inc_files.
555 my @copy = @inc_files;
556 my @all_inc_files = (@inc_files,
557 map { scan_file ($type, $_,
558 "$file:$inc_lines{$_}") } @copy);
559 $file_includes{$file} = \@all_inc_files;
560 return @all_inc_files;
563 # strip_redundant_includes (%FILES)
564 # ---------------------------------
565 # Each key in %FILES is a file that must be present in the output.
566 # However some of these files might already include other files in %FILES,
567 # so there is no point in including them another time.
568 # This removes items of %FILES which are already included by another file.
569 sub strip_redundant_includes (%)
573 # Always include acinclude.m4, even if it does not appear to be used.
574 $files{'acinclude.m4'} = 1 if -f 'acinclude.m4';
575 # File included by $configure_ac are redundant.
576 $files{$configure_ac} = 1;
578 # Files at the end of @file_order should override those at the beginning,
579 # so it is important to preserve these trailing files. We can remove
580 # a file A if it is going to be output before a file B that includes
581 # file A, not the converse.
582 foreach my $file (reverse @file_order)
584 next unless exists $files{$file};
585 foreach my $ifile (@{$file_includes{$file}})
587 next unless exists $files{$ifile};
588 delete $files{$ifile};
589 verb "$ifile is already included by $file";
593 # configure.ac is implicitly included.
594 delete $files{$configure_ac};
599 sub trace_used_macros ()
601 my %files = map { $map{$_} => 1 } keys %macro_seen;
602 %files = strip_redundant_includes %files;
604 my $traces = ($ENV{AUTOM4TE} || 'autom4te');
605 $traces .= " --language Autoconf-without-aclocal-m4 ";
606 # All candidate files.
607 $traces .= join (' ', grep { exists $files{$_} } @file_order) . " ";
608 # All candidate macros.
609 $traces .= join (' ',
610 (map { "--trace='$_:\$f::\$n::\$1'" } ('AC_DEFUN',
613 # Do not trace $1 for all other macros as we do
614 # not need it and it might contains harmful
615 # characters (like newlines).
616 (map { "--trace='$_:\$f::\$n'" } (keys %macro_seen)));
618 verb "running $traces $configure_ac";
620 my $tracefh = new Automake::XFile ("$traces $configure_ac |");
624 while ($_ = $tracefh->getline)
627 my ($file, $macro, $arg1) = split (/::/);
629 $traced{$macro} = 1 if exists $macro_seen{$macro};
631 $map_traced_defs{$arg1} = $file
632 if ($macro eq 'AC_DEFUN'
633 || $macro eq 'AC_DEFUN_ONCE'
634 || $macro eq 'AU_DEFUN');
642 sub scan_configure ()
644 # Make sure we include acinclude.m4 if it exists.
645 if (-f 'acinclude.m4')
647 add_file ('acinclude.m4');
649 scan_configure_dep ($configure_ac);
652 ################################################################
655 # Return 0 iff some files were installed locally.
656 sub write_aclocal ($@)
658 my ($output_file, @macros) = @_;
662 # Get the list of files containing definitions for the macros used.
663 # (Filter out unused macro definitions with $map_traced_defs. This
664 # can happen when an Autoconf macro is conditionally defined:
665 # aclocal sees the potential definition, but this definition is
666 # actually never processed and the Autoconf implementation is used
671 if (exists $map_traced_defs{$m}
672 && $map{$m} eq $map_traced_defs{$m});
674 # Do not explicitly include a file that is already indirectly included.
675 %files = strip_redundant_includes %files;
679 for my $file (grep { exists $files{$_} } @file_order)
681 # Check the time stamp of this file, and of all files it includes.
682 for my $ifile ($file, @{$file_includes{$file}})
684 my $mtime = mtime $ifile;
685 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
688 # If the file to add looks like outside the project, copy it
689 # to the output. The regex catches filenames starting with
690 # things like `/', `\', or `c:\'.
691 if ($file_type{$file} != FT_USER
692 || $file =~ m,^(?:\w:)?[\\/],)
694 if (!$install || $file_type{$file} != FT_SYSTEM)
696 # Copy the file into aclocal.m4.
697 $output .= $file_contents{$file} . "\n";
701 # Install the file (and any file it includes).
703 for my $ifile (@{$file_includes{$file}}, $file)
705 $dest = "$user_includes[0]/" . basename $ifile;
706 verb "installing $ifile to $dest";
707 install_file ($ifile, $dest);
714 # Otherwise, simply include the file.
715 $output .= "m4_include([$file])\n";
721 verb "running aclocal anew, because some files were installed locally";
725 # Nothing to output?!
726 # FIXME: Shouldn't we diagnose this?
727 return 1 if ! length ($output);
729 # We used to print `# $output_file generated automatically etc.' But
730 # this creates spurious differences when using autoreconf. Autoreconf
731 # creates aclocal.m4t and then rename it to aclocal.m4, but the
732 # rebuild rules generated by Automake create aclocal.m4 directly --
733 # this would gives two ways to get the same file, with a different
734 # name in the header.
735 $output = "# generated automatically by aclocal $VERSION -*- Autoconf -*-
737 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
738 # 2005, 2006 Free Software Foundation, Inc.
739 # This file is free software; the Free Software Foundation
740 # gives unlimited permission to copy and/or distribute it,
741 # with or without modifications, as long as this notice is preserved.
743 # This program is distributed in the hope that it will be useful,
744 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
745 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
746 # PARTICULAR PURPOSE.
750 # We try not to update $output_file unless necessary, because
751 # doing so invalidate Autom4te's cache and therefore slows down
752 # tools called after aclocal.
754 # We need to overwrite $output_file in the following situations.
755 # * The --force option is in use.
756 # * One of the dependencies is younger.
757 # (Not updating $output_file in this situation would cause
758 # make to call aclocal in loop.)
759 # * The contents of the current file are different from what
762 && $greatest_mtime < mtime ($output_file)
763 && $output eq contents ($output_file))
765 verb "$output_file unchanged";
769 verb "writing $output_file";
773 if (-e $output_file && !unlink $output_file)
775 fatal "could not remove `$output_file': $!";
777 my $out = new Automake::XFile "> $output_file";
783 ################################################################
785 # Print usage and exit.
790 print "Usage: aclocal [OPTIONS] ...
792 Generate `aclocal.m4' by scanning `configure.ac' or `configure.in'
795 --acdir=DIR directory holding config files (for debugging)
796 --diff[=COMMAND] run COMMAND [diff -u] on M4 files that would be
797 changed (implies --install and --dry-run)
798 --dry-run pretend to, but do not actually update any file
799 --force always update output file
800 --help print this help, then exit
801 -I DIR add directory to search list for .m4 files
802 --install copy third-party files to the first -I directory
803 --output=FILE put output in FILE (default aclocal.m4)
804 --print-ac-dir print name of directory holding m4 files, then exit
805 --verbose don't be silent
806 --version print version number, then exit
807 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
809 Warning categories include:
810 `syntax' dubious syntactic constructs (default)
811 `unsupported' unknown macros (default)
812 `all' all the warnings (default)
813 `no-CATEGORY' turn off warnings in CATEGORY
814 `none' turn off all the warnings
815 `error' treat warnings as errors
817 Report bugs to <bug-automake\@gnu.org>.\n";
822 # Print version and exit.
826 aclocal (GNU $PACKAGE) $VERSION
827 Written by Tom Tromey <tromey\@redhat.com>
828 and Alexandre Duret-Lutz <adl\@gnu.org>.
830 Copyright (C) 2006 Free Software Foundation, Inc.
831 This is free software; see the source for copying conditions. There is NO
832 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
837 # Parse command line.
838 sub parse_arguments ()
840 my $print_and_exit = 0;
845 'acdir=s' => sub # Setting --acdir overrides both the
846 { # automake (versioned) directory and the
847 # public (unversioned) system directory.
848 @automake_includes = ();
849 @system_includes = ($_[1])
851 'diff:s' => \$diff_command,
852 'dry-run' => \$dry_run,
853 'force' => \$force_output,
854 'I=s' => \@user_includes,
855 'install' => \$install,
856 'output=s' => \$output_file,
857 'print-ac-dir' => \$print_and_exit,
858 'verbose' => sub { setup_channel 'verb', silent => 0; },
859 'W|warnings=s' => \&parse_warnings,
862 Getopt::Long::config ("bundling", "pass_through");
864 # See if --version or --help is used. We want to process these before
865 # anything else because the GNU Coding Standards require us to
866 # `exit 0' after processing these options, and we can't guarantee this
867 # if we treat other options first. (Handling other options first
868 # could produce error diagnostics, and in this condition it is
869 # confusing if aclocal does `exit 0'.)
870 my %cli_options_1st_pass =
872 'version' => \&version,
873 'help' => sub { usage(0); },
874 # Recognize all other options (and their arguments) but do nothing.
875 map { $_ => sub {} } (keys %cli_options)
877 my @ARGV_backup = @ARGV;
878 Getopt::Long::GetOptions %cli_options_1st_pass
880 @ARGV = @ARGV_backup;
882 # Now *really* process the options. This time we know that --help
883 # and --version are not present, but we specify them nonetheless so
884 # that ambiguous abbreviation are diagnosed.
885 Getopt::Long::GetOptions %cli_options, 'version' => sub {}, 'help' => sub {}
891 for my $k (keys %cli_options)
895 map { $argopts{(length ($_) == 1)
896 ? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
899 if (exists $argopts{$ARGV[0]})
901 fatal ("option `$ARGV[0]' requires an argument\n"
902 . "Try `$0 --help' for more information.");
906 fatal ("unrecognized option `$ARGV[0]'\n"
907 . "Try `$0 --help' for more information.");
913 print "@system_includes\n";
917 if (defined $diff_command)
919 $diff_command = 'diff -u' if $diff_command eq '';
920 @diff_command = split (' ', $diff_command);
925 if ($install && !@user_includes)
927 fatal ("--install should copy macros in the directory indicated by the"
928 . "\nfirst -I option, but no -I was supplied.");
931 if (! -d $system_includes[0])
933 # By default $(datadir)/aclocal doesn't exist. We don't want to
934 # get an error in the case where we are searching the default
935 # directory and it hasn't been created. (We know
936 # @system_includes has its default value if @automake_includes
937 # is not empty, because --acdir is the only way to change this.)
938 @system_includes = () if @automake_includes;
942 # Finally, adds any directory listed in the `dirlist' file.
943 if (open (DIRLIST, "$system_includes[0]/dirlist"))
949 # strip off newlines and end-of-line comments
952 foreach my $dir (glob)
954 push (@system_includes, $dir) if -d $dir;
962 ################################################################
964 parse_WARNINGS; # Parse the WARNINGS environment variable.
966 $configure_ac = require_configure_ac;
968 # We may have to rerun aclocal if some file have been installed, but
969 # it should not happen more than once. The reason we must run again
970 # is that once the file has been moved from /usr/share/aclocal/ to the
971 # local m4/ directory it appears at a new place in the search path,
972 # hence it should be output at a different position in aclocal.m4. If
973 # we did not rerun aclocal, the next run of aclocal would produce a
974 # different aclocal.m4.
979 prog_error "Too many loops." if $loop > 2;
985 my %macro_traced = trace_used_macros;
986 last if write_aclocal ($output_file, keys %macro_traced);
993 ### Setup "GNU" style for perl-mode and cperl-mode.
995 ## perl-indent-level: 2
996 ## perl-continued-statement-offset: 2
997 ## perl-continued-brace-offset: 0
998 ## perl-brace-offset: 0
999 ## perl-brace-imaginary-offset: 0
1000 ## perl-label-offset: -2
1001 ## cperl-indent-level: 2
1002 ## cperl-brace-offset: 0
1003 ## cperl-continued-brace-offset: 0
1004 ## cperl-label-offset: -2
1005 ## cperl-extra-newline-before-brace: t
1006 ## cperl-merge-trailing-else: nil
1007 ## cperl-continued-statement-offset: 2