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 3, 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 $serial_number_rx = '^\d+(?:\.\d+)*$';
145 # Set by trace_used_macros.
148 # If set, names a temporary file that must be erased on abnormal exit.
151 ################################################################
153 # Erase temporary file ERASE_ME.
156 if (defined $erase_me && -e $erase_me && !unlink ($erase_me))
158 fatal "could not remove `$erase_me': $!";
163 $SIG{'INT'} = $SIG{'TERM'} = $SIG{'QUIT'} = $SIG{'HUP'} = 'unlink_tmp';
166 # Check macros in acinclude.m4. If one is not used, warn.
167 sub check_acinclude ()
169 foreach my $key (keys %map)
171 # FIXME: should print line number of acinclude.m4.
172 msg ('syntax', "warning: macro `$key' defined in "
173 . "acinclude.m4 but never used")
174 if $map{$key} eq 'acinclude.m4' && ! exists $macro_seen{$key};
184 %map_traced_defs = ();
189 %scanned_configure_dep = ();
195 # install_file ($SRC, $DEST)
196 sub install_file ($$)
198 my ($src, $dest) = @_;
202 || !exists $file_contents{$dest}
203 || $file_contents{$src} ne $file_contents{$dest})
207 msg 'note', "overwriting `$dest' with `$src'";
212 msg 'note', "installing `$dest' from `$src'";
217 if (! defined $diff_dest)
219 # $dest does not exist. We create an empty one just to
220 # run diff, and we erase it afterward. Using the real
221 # the destination file (rather than a temporary file) is
222 # good when diff is run with options that display the
225 # If creating $dest fails, fall back to /dev/null. At
226 # least one diff implementation (Tru64's) cannot deal
227 # with /dev/null. However working around this is not
228 # worth the trouble since nobody run aclocal on a
229 # read-only tree anyway.
231 my $f = new IO::File "> $dest";
235 $diff_dest = '/dev/null';
243 my @cmd = (@diff_command, $diff_dest, $src);
245 verb "running: @cmd";
246 my $res = system (@cmd);
247 Automake::FileUtils::handle_exec_errors "@cmd", 1
253 xsystem ('cp', $src, $dest);
258 # Compare two lists of numbers.
259 sub list_compare (\@\@)
267 return (0 == @r) ? 0 : -1;
273 elsif ($l[0] < $r[0])
277 elsif ($l[0] > $r[0])
286 ################################################################
288 # scan_m4_dirs($TYPE, @DIRS)
289 # --------------------------
290 # Scan all M4 files installed in @DIRS for new macro definitions.
291 # Register each file as of type $TYPE (one of the FT_* constants).
292 sub scan_m4_dirs ($@)
294 my ($type, @dirlist) = @_;
296 foreach my $m4dir (@dirlist)
298 if (! opendir (DIR, $m4dir))
300 fatal "couldn't open directory `$m4dir': $!";
303 # We reverse the directory contents so that foo2.m4 gets
304 # used in preference to foo1.m4.
305 foreach my $file (reverse sort grep (! /^\./, readdir (DIR)))
307 # Only examine .m4 files.
308 next unless $file =~ /\.m4$/;
310 # Skip some files when running out of srcdir.
311 next if $file eq 'aclocal.m4';
313 my $fullfile = File::Spec->canonpath ("$m4dir/$file");
314 &scan_file ($type, $fullfile, 'aclocal');
320 # Scan all the installed m4 files and construct a map.
323 # First, scan configure.ac. It may contain macro definitions,
324 # or may include other files that define macros.
325 &scan_file (FT_USER, $configure_ac, 'aclocal');
327 # Then, scan acinclude.m4 if it exists.
328 if (-f 'acinclude.m4')
330 &scan_file (FT_USER, 'acinclude.m4', 'aclocal');
333 # Finally, scan all files in our search paths.
334 scan_m4_dirs (FT_USER, @user_includes);
335 scan_m4_dirs (FT_AUTOMAKE, @automake_includes);
336 scan_m4_dirs (FT_SYSTEM, @system_includes);
338 # Construct a new function that does the searching. We use a
339 # function (instead of just evaluating $search in the loop) so that
340 # "die" is correctly and easily propagated if run.
341 my $search = "sub search {\nmy \$found = 0;\n";
342 foreach my $key (reverse sort keys %map)
344 $search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { & add_macro ("' . $key
345 . '"); $found = 1; }' . "\n");
347 $search .= "return \$found;\n};\n";
349 prog_error "$@\n search is $search" if $@;
352 ################################################################
354 # Add a macro to the output.
359 # Ignore unknown required macros. Either they are not really
360 # needed (e.g., a conditional AC_REQUIRE), in which case aclocal
361 # should be quiet, or they are needed and Autoconf itself will
362 # complain when we trace for macro usage later.
363 return unless defined $map{$macro};
365 verb "saw macro $macro";
366 $macro_seen{$macro} = 1;
367 &add_file ($map{$macro});
370 # scan_configure_dep ($file)
371 # --------------------------
372 # Scan a configure dependency (configure.ac, or separate m4 files)
373 # for uses of known macros and AC_REQUIREs of possibly unknown macros.
374 # Recursively scan m4_included files.
375 sub scan_configure_dep ($)
378 # Do not scan a file twice.
380 if exists $scanned_configure_dep{$file};
381 $scanned_configure_dep{$file} = 1;
383 my $mtime = mtime $file;
384 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
386 my $contents = exists $file_contents{$file} ?
387 $file_contents{$file} : contents $file;
392 foreach (split ("\n", $contents))
395 # Remove comments from current line.
398 # Avoid running all the following regexes on white lines.
401 while (/$m4_include_rx/go)
403 my $ifile = $2 || $3;
404 # Skip missing `sinclude'd files.
405 next if $1 ne 'm4_' && ! -f $ifile;
409 while (/$ac_require_rx/go)
411 push (@rlist, $1 || $2);
414 # The search function is constructed dynamically by
415 # scan_m4_files. The last parenthetical match makes sure we
416 # don't match things that look like macro assignments or
418 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
420 # Macro not found, but AM_ prefix found.
421 # Make this just a warning, because we do not know whether
422 # the macro is actually used (it could be called conditionally).
423 msg ('unsupported', "$file:$line",
424 "warning: macro `$2' not found in library");
428 add_macro ($_) foreach (@rlist);
429 &scan_configure_dep ($_) foreach @ilist;
434 # Add $FILE to output.
439 # Only add a file once.
440 return if ($file_added{$file});
441 $file_added{$file} = 1;
443 scan_configure_dep $file;
446 # Point to the documentation for underquoted AC_DEFUN only once.
447 my $underquoted_manual_once = 0;
449 # scan_file ($TYPE, $FILE, $WHERE)
450 # --------------------------------
451 # Scan a single M4 file ($FILE), and all files it includes.
452 # Return the list of included files.
453 # $TYPE is one of FT_USER, FT_AUTOMAKE, or FT_SYSTEM, depending
454 # on where the file comes from.
455 # $WHERE is the location to use in the diagnostic if the file
459 my ($type, $file, $where) = @_;
460 my $basename = basename $file;
462 # Do not scan the same file twice.
463 return @{$file_includes{$file}} if exists $file_includes{$file};
464 # Prevent potential infinite recursion (if two files include each other).
465 return () if exists $file_contents{$file};
467 unshift @file_order, $file;
469 $file_type{$file} = $type;
471 fatal "$where: file `$file' does not exist" if ! -e $file;
473 my $fh = new Automake::XFile $file;
480 my $serial_older = 0;
482 while ($_ = $fh->getline)
490 if ($line =~ /$serial_line_rx/go)
493 if ($number !~ /$serial_number_rx/go)
495 msg ('syntax', "$file:$.",
496 "warning: ill-formed serial number `$number', "
497 . "expecting a version string with only digits and dots");
501 # aclocal removes all definitions from M4 file with the
502 # same basename if a greater serial number is found.
503 # Encountering a serial after some macros will undefine
505 msg ('syntax', "$file:$.",
506 'the serial number must appear before any macro definition');
508 # We really care about serials only for non-automake macros
509 # and when --install is used. But the above diagnostics are
510 # made regardless of this, because not using --install is
511 # not a reason not the fix macro files.
512 elsif ($install && $type != FT_AUTOMAKE)
515 my @new = split (/\./, $number);
517 verb "$file:$.: serial $number";
519 if (!exists $serial{$basename}
520 || list_compare (@new, @{$serial{$basename}}) > 0)
522 # Delete any definition we knew from the old macro.
523 foreach my $def (@{$invmap{$basename}})
525 verb "$file:$.: ignoring previous definition of $def";
528 $invmap{$basename} = [];
529 $serial{$basename} = \@new;
538 # Remove comments from current line.
539 # Do not do it earlier, because the serial line is a comment.
540 $line =~ s/\bdnl\b.*$//;
543 while ($line =~ /$ac_defun_rx/go)
548 msg ('syntax', "$file:$.", "warning: underquoted definition of $2"
549 . "\n run info '(automake)Extending aclocal'\n"
550 . " or see http://sources.redhat.com/automake/"
551 . "automake.html#Extending-aclocal")
552 unless $underquoted_manual_once;
553 $underquoted_manual_once = 1;
556 # If this macro does not have a serial and we have already
557 # seen a macro with the same basename earlier, we should
558 # ignore the macro (don't exit immediately so we can still
559 # diagnose later #serial numbers and underquoted macros).
560 $serial_older ||= ($type != FT_AUTOMAKE
561 && !$serial_seen && exists $serial{$basename});
563 my $macro = $1 || $2;
564 if (!$serial_older && !defined $map{$macro})
566 verb "found macro $macro in $file: $.";
567 $map{$macro} = $file;
568 push @{$invmap{$basename}}, $macro;
572 # Note: we used to give an error here if we saw a
573 # duplicated macro. However, this turns out to be
574 # extremely unpopular. It causes actual problems which
575 # are hard to work around, especially when you must
576 # mix-and-match tool versions.
577 verb "ignoring macro $macro in $file: $.";
581 while ($line =~ /$m4_include_rx/go)
583 my $ifile = $2 || $3;
584 # Skip missing `sinclude'd files.
585 next if $1 ne 'm4_' && ! -f $ifile;
586 push (@inc_files, $ifile);
587 $inc_lines{$ifile} = $.;
591 # Ignore any file that has an old serial (or no serial if we know
592 # another one with a serial).
595 ($type != FT_AUTOMAKE && !$serial_seen && exists $serial{$basename}));
597 $file_contents{$file} = $contents;
599 # For some reason I don't understand, it does not work
600 # to do `map { scan_file ($_, ...) } @inc_files' below.
601 # With Perl 5.8.2 it undefines @inc_files.
602 my @copy = @inc_files;
603 my @all_inc_files = (@inc_files,
604 map { scan_file ($type, $_,
605 "$file:$inc_lines{$_}") } @copy);
606 $file_includes{$file} = \@all_inc_files;
607 return @all_inc_files;
610 # strip_redundant_includes (%FILES)
611 # ---------------------------------
612 # Each key in %FILES is a file that must be present in the output.
613 # However some of these files might already include other files in %FILES,
614 # so there is no point in including them another time.
615 # This removes items of %FILES which are already included by another file.
616 sub strip_redundant_includes (%)
620 # Always include acinclude.m4, even if it does not appear to be used.
621 $files{'acinclude.m4'} = 1 if -f 'acinclude.m4';
622 # File included by $configure_ac are redundant.
623 $files{$configure_ac} = 1;
625 # Files at the end of @file_order should override those at the beginning,
626 # so it is important to preserve these trailing files. We can remove
627 # a file A if it is going to be output before a file B that includes
628 # file A, not the converse.
629 foreach my $file (reverse @file_order)
631 next unless exists $files{$file};
632 foreach my $ifile (@{$file_includes{$file}})
634 next unless exists $files{$ifile};
635 delete $files{$ifile};
636 verb "$ifile is already included by $file";
640 # configure.ac is implicitly included.
641 delete $files{$configure_ac};
646 sub trace_used_macros ()
648 my %files = map { $map{$_} => 1 } keys %macro_seen;
649 %files = strip_redundant_includes %files;
651 my $traces = ($ENV{AUTOM4TE} || 'autom4te');
652 $traces .= " --language Autoconf-without-aclocal-m4 ";
653 # All candidate files.
654 $traces .= join (' ', grep { exists $files{$_} } @file_order) . " ";
655 # All candidate macros.
656 $traces .= join (' ',
657 (map { "--trace='$_:\$f::\$n::\$1'" }
661 '_AM_AUTOCONF_VERSION')),
662 # Do not trace $1 for all other macros as we do
663 # not need it and it might contains harmful
664 # characters (like newlines).
665 (map { "--trace='$_:\$f::\$n'" } (keys %macro_seen)));
667 verb "running $traces $configure_ac";
669 my $tracefh = new Automake::XFile ("$traces $configure_ac |");
673 while ($_ = $tracefh->getline)
676 my ($file, $macro, $arg1) = split (/::/);
678 $traced{$macro} = 1 if exists $macro_seen{$macro};
680 $map_traced_defs{$arg1} = $file
681 if ($macro eq 'AC_DEFUN'
682 || $macro eq 'AC_DEFUN_ONCE'
683 || $macro eq 'AU_DEFUN');
685 $ac_version = $arg1 if $macro eq '_AM_AUTOCONF_VERSION';
693 sub scan_configure ()
695 # Make sure we include acinclude.m4 if it exists.
696 if (-f 'acinclude.m4')
698 add_file ('acinclude.m4');
700 scan_configure_dep ($configure_ac);
703 ################################################################
706 # Return 0 iff some files were installed locally.
707 sub write_aclocal ($@)
709 my ($output_file, @macros) = @_;
713 # Get the list of files containing definitions for the macros used.
714 # (Filter out unused macro definitions with $map_traced_defs. This
715 # can happen when an Autoconf macro is conditionally defined:
716 # aclocal sees the potential definition, but this definition is
717 # actually never processed and the Autoconf implementation is used
722 if (exists $map_traced_defs{$m}
723 && $map{$m} eq $map_traced_defs{$m});
725 # Do not explicitly include a file that is already indirectly included.
726 %files = strip_redundant_includes %files;
730 for my $file (grep { exists $files{$_} } @file_order)
732 # Check the time stamp of this file, and of all files it includes.
733 for my $ifile ($file, @{$file_includes{$file}})
735 my $mtime = mtime $ifile;
736 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
739 # If the file to add looks like outside the project, copy it
740 # to the output. The regex catches filenames starting with
741 # things like `/', `\', or `c:\'.
742 if ($file_type{$file} != FT_USER
743 || $file =~ m,^(?:\w:)?[\\/],)
745 if (!$install || $file_type{$file} != FT_SYSTEM)
747 # Copy the file into aclocal.m4.
748 $output .= $file_contents{$file} . "\n";
752 # Install the file (and any file it includes).
754 for my $ifile (@{$file_includes{$file}}, $file)
756 $dest = "$user_includes[0]/" . basename $ifile;
757 verb "installing $ifile to $dest";
758 install_file ($ifile, $dest);
765 # Otherwise, simply include the file.
766 $output .= "m4_include([$file])\n";
772 verb "running aclocal anew, because some files were installed locally";
776 # Nothing to output?!
777 # FIXME: Shouldn't we diagnose this?
778 return 1 if ! length ($output);
782 # Do not use "$output_file" here for the same reason we do not
783 # use it in the header below. autom4te will output the name of
784 # the file in the diagnostic anyway.
785 $output = "m4_if(m4_PACKAGE_VERSION, [$ac_version],,
786 [m4_warning([this file was generated for autoconf $ac_version.
787 You have another version of autoconf. It may work, but is not guaranteed to.
788 If you have problems, you may need to regenerate the build system entirely.
789 To do so, use the procedure documented by the package, typically `autoreconf'.])])
794 # We used to print `# $output_file generated automatically etc.' But
795 # this creates spurious differences when using autoreconf. Autoreconf
796 # creates aclocal.m4t and then rename it to aclocal.m4, but the
797 # rebuild rules generated by Automake create aclocal.m4 directly --
798 # this would gives two ways to get the same file, with a different
799 # name in the header.
800 $output = "# generated automatically by aclocal $VERSION -*- Autoconf -*-
802 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
803 # 2005, 2006 Free Software Foundation, Inc.
804 # This file is free software; the Free Software Foundation
805 # gives unlimited permission to copy and/or distribute it,
806 # with or without modifications, as long as this notice is preserved.
808 # This program is distributed in the hope that it will be useful,
809 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
810 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
811 # PARTICULAR PURPOSE.
815 # We try not to update $output_file unless necessary, because
816 # doing so invalidate Autom4te's cache and therefore slows down
817 # tools called after aclocal.
819 # We need to overwrite $output_file in the following situations.
820 # * The --force option is in use.
821 # * One of the dependencies is younger.
822 # (Not updating $output_file in this situation would cause
823 # make to call aclocal in loop.)
824 # * The contents of the current file are different from what
827 && $greatest_mtime < mtime ($output_file)
828 && $output eq contents ($output_file))
830 verb "$output_file unchanged";
834 verb "writing $output_file";
838 if (-e $output_file && !unlink $output_file)
840 fatal "could not remove `$output_file': $!";
842 my $out = new Automake::XFile "> $output_file";
848 ################################################################
850 # Print usage and exit.
855 print "Usage: aclocal [OPTIONS] ...
857 Generate `aclocal.m4' by scanning `configure.ac' or `configure.in'
860 --acdir=DIR directory holding config files (for debugging)
861 --diff[=COMMAND] run COMMAND [diff -u] on M4 files that would be
862 changed (implies --install and --dry-run)
863 --dry-run pretend to, but do not actually update any file
864 --force always update output file
865 --help print this help, then exit
866 -I DIR add directory to search list for .m4 files
867 --install copy third-party files to the first -I directory
868 --output=FILE put output in FILE (default aclocal.m4)
869 --print-ac-dir print name of directory holding m4 files, then exit
870 --verbose don't be silent
871 --version print version number, then exit
872 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
874 Warning categories include:
875 `syntax' dubious syntactic constructs (default)
876 `unsupported' unknown macros (default)
877 `all' all the warnings (default)
878 `no-CATEGORY' turn off warnings in CATEGORY
879 `none' turn off all the warnings
880 `error' treat warnings as errors
882 Report bugs to <bug-automake\@gnu.org>.\n";
887 # Print version and exit.
891 aclocal (GNU $PACKAGE) $VERSION
892 Written by Tom Tromey <tromey\@redhat.com>
893 and Alexandre Duret-Lutz <adl\@gnu.org>.
895 Copyright (C) 2006 Free Software Foundation, Inc.
896 This is free software; see the source for copying conditions. There is NO
897 warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
902 # Parse command line.
903 sub parse_arguments ()
905 my $print_and_exit = 0;
910 'acdir=s' => sub # Setting --acdir overrides both the
911 { # automake (versioned) directory and the
912 # public (unversioned) system directory.
913 @automake_includes = ();
914 @system_includes = ($_[1])
916 'diff:s' => \$diff_command,
917 'dry-run' => \$dry_run,
918 'force' => \$force_output,
919 'I=s' => \@user_includes,
920 'install' => \$install,
921 'output=s' => \$output_file,
922 'print-ac-dir' => \$print_and_exit,
923 'verbose' => sub { setup_channel 'verb', silent => 0; },
924 'W|warnings=s' => \&parse_warnings,
927 Getopt::Long::config ("bundling", "pass_through");
929 # See if --version or --help is used. We want to process these before
930 # anything else because the GNU Coding Standards require us to
931 # `exit 0' after processing these options, and we can't guarantee this
932 # if we treat other options first. (Handling other options first
933 # could produce error diagnostics, and in this condition it is
934 # confusing if aclocal does `exit 0'.)
935 my %cli_options_1st_pass =
937 'version' => \&version,
938 'help' => sub { usage(0); },
939 # Recognize all other options (and their arguments) but do nothing.
940 map { $_ => sub {} } (keys %cli_options)
942 my @ARGV_backup = @ARGV;
943 Getopt::Long::GetOptions %cli_options_1st_pass
945 @ARGV = @ARGV_backup;
947 # Now *really* process the options. This time we know that --help
948 # and --version are not present, but we specify them nonetheless so
949 # that ambiguous abbreviation are diagnosed.
950 Getopt::Long::GetOptions %cli_options, 'version' => sub {}, 'help' => sub {}
956 for my $k (keys %cli_options)
960 map { $argopts{(length ($_) == 1)
961 ? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
964 if (exists $argopts{$ARGV[0]})
966 fatal ("option `$ARGV[0]' requires an argument\n"
967 . "Try `$0 --help' for more information.");
971 fatal ("unrecognized option `$ARGV[0]'\n"
972 . "Try `$0 --help' for more information.");
978 print "@system_includes\n";
982 if (defined $diff_command)
984 $diff_command = 'diff -u' if $diff_command eq '';
985 @diff_command = split (' ', $diff_command);
990 if ($install && !@user_includes)
992 fatal ("--install should copy macros in the directory indicated by the"
993 . "\nfirst -I option, but no -I was supplied.");
996 if (! -d $system_includes[0])
998 # By default $(datadir)/aclocal doesn't exist. We don't want to
999 # get an error in the case where we are searching the default
1000 # directory and it hasn't been created. (We know
1001 # @system_includes has its default value if @automake_includes
1002 # is not empty, because --acdir is the only way to change this.)
1003 @system_includes = () if @automake_includes;
1007 # Finally, adds any directory listed in the `dirlist' file.
1008 if (open (DIRLIST, "$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;
1027 ################################################################
1029 parse_WARNINGS; # Parse the WARNINGS environment variable.
1031 $configure_ac = require_configure_ac;
1033 # We may have to rerun aclocal if some file have been installed, but
1034 # it should not happen more than once. The reason we must run again
1035 # is that once the file has been moved from /usr/share/aclocal/ to the
1036 # local m4/ directory it appears at a new place in the search path,
1037 # hence it should be output at a different position in aclocal.m4. If
1038 # we did not rerun aclocal, the next run of aclocal would produce a
1039 # different aclocal.m4.
1044 prog_error "Too many loops." if $loop > 2;
1050 my %macro_traced = trace_used_macros;
1051 last if write_aclocal ($output_file, keys %macro_traced);
1058 ### Setup "GNU" style for perl-mode and cperl-mode.
1060 ## perl-indent-level: 2
1061 ## perl-continued-statement-offset: 2
1062 ## perl-continued-brace-offset: 0
1063 ## perl-brace-offset: 0
1064 ## perl-brace-imaginary-offset: 0
1065 ## perl-label-offset: -2
1066 ## cperl-indent-level: 2
1067 ## cperl-brace-offset: 0
1068 ## cperl-continued-brace-offset: 0
1069 ## cperl-label-offset: -2
1070 ## cperl-extra-newline-before-brace: t
1071 ## cperl-merge-trailing-else: nil
1072 ## cperl-continued-statement-offset: 2