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, 2007 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. Handle signals.
160 verb "caught SIG$sig, bailing out";
162 if (defined $erase_me && -e $erase_me && !unlink ($erase_me))
164 fatal "could not remove `$erase_me': $!";
168 # reraise default handler.
171 $SIG{$sig} = 'DEFAULT';
176 $SIG{'INT'} = $SIG{'TERM'} = $SIG{'QUIT'} = $SIG{'HUP'} = 'unlink_tmp';
179 # Check macros in acinclude.m4. If one is not used, warn.
180 sub check_acinclude ()
182 foreach my $key (keys %map)
184 # FIXME: should print line number of acinclude.m4.
185 msg ('syntax', "warning: macro `$key' defined in "
186 . "acinclude.m4 but never used")
187 if $map{$key} eq 'acinclude.m4' && ! exists $macro_seen{$key};
197 %map_traced_defs = ();
202 %scanned_configure_dep = ();
208 # install_file ($SRC, $DEST)
209 sub install_file ($$)
211 my ($src, $dest) = @_;
215 || !exists $file_contents{$dest}
216 || $file_contents{$src} ne $file_contents{$dest})
220 msg 'note', "overwriting `$dest' with `$src'";
225 msg 'note', "installing `$dest' from `$src'";
230 if (! defined $diff_dest)
232 # $dest does not exist. We create an empty one just to
233 # run diff, and we erase it afterward. Using the real
234 # the destination file (rather than a temporary file) is
235 # good when diff is run with options that display the
238 # If creating $dest fails, fall back to /dev/null. At
239 # least one diff implementation (Tru64's) cannot deal
240 # with /dev/null. However working around this is not
241 # worth the trouble since nobody run aclocal on a
242 # read-only tree anyway.
244 my $f = new IO::File "> $dest";
248 $diff_dest = '/dev/null';
256 my @cmd = (@diff_command, $diff_dest, $src);
258 verb "running: @cmd";
259 my $res = system (@cmd);
260 Automake::FileUtils::handle_exec_errors "@cmd", 1
266 xsystem ('cp', $src, $dest);
271 # Compare two lists of numbers.
272 sub list_compare (\@\@)
280 return (0 == @r) ? 0 : -1;
286 elsif ($l[0] < $r[0])
290 elsif ($l[0] > $r[0])
299 ################################################################
301 # scan_m4_dirs($TYPE, @DIRS)
302 # --------------------------
303 # Scan all M4 files installed in @DIRS for new macro definitions.
304 # Register each file as of type $TYPE (one of the FT_* constants).
305 sub scan_m4_dirs ($@)
307 my ($type, @dirlist) = @_;
309 foreach my $m4dir (@dirlist)
311 if (! opendir (DIR, $m4dir))
313 fatal "couldn't open directory `$m4dir': $!";
316 # We reverse the directory contents so that foo2.m4 gets
317 # used in preference to foo1.m4.
318 foreach my $file (reverse sort grep (! /^\./, readdir (DIR)))
320 # Only examine .m4 files.
321 next unless $file =~ /\.m4$/;
323 # Skip some files when running out of srcdir.
324 next if $file eq 'aclocal.m4';
326 my $fullfile = File::Spec->canonpath ("$m4dir/$file");
327 &scan_file ($type, $fullfile, 'aclocal');
333 # Scan all the installed m4 files and construct a map.
336 # First, scan configure.ac. It may contain macro definitions,
337 # or may include other files that define macros.
338 &scan_file (FT_USER, $configure_ac, 'aclocal');
340 # Then, scan acinclude.m4 if it exists.
341 if (-f 'acinclude.m4')
343 &scan_file (FT_USER, 'acinclude.m4', 'aclocal');
346 # Finally, scan all files in our search paths.
347 scan_m4_dirs (FT_USER, @user_includes);
348 scan_m4_dirs (FT_AUTOMAKE, @automake_includes);
349 scan_m4_dirs (FT_SYSTEM, @system_includes);
351 # Construct a new function that does the searching. We use a
352 # function (instead of just evaluating $search in the loop) so that
353 # "die" is correctly and easily propagated if run.
354 my $search = "sub search {\nmy \$found = 0;\n";
355 foreach my $key (reverse sort keys %map)
357 $search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { & add_macro ("' . $key
358 . '"); $found = 1; }' . "\n");
360 $search .= "return \$found;\n};\n";
362 prog_error "$@\n search is $search" if $@;
365 ################################################################
367 # Add a macro to the output.
372 # Ignore unknown required macros. Either they are not really
373 # needed (e.g., a conditional AC_REQUIRE), in which case aclocal
374 # should be quiet, or they are needed and Autoconf itself will
375 # complain when we trace for macro usage later.
376 return unless defined $map{$macro};
378 verb "saw macro $macro";
379 $macro_seen{$macro} = 1;
380 &add_file ($map{$macro});
383 # scan_configure_dep ($file)
384 # --------------------------
385 # Scan a configure dependency (configure.ac, or separate m4 files)
386 # for uses of known macros and AC_REQUIREs of possibly unknown macros.
387 # Recursively scan m4_included files.
388 sub scan_configure_dep ($)
391 # Do not scan a file twice.
393 if exists $scanned_configure_dep{$file};
394 $scanned_configure_dep{$file} = 1;
396 my $mtime = mtime $file;
397 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
399 my $contents = exists $file_contents{$file} ?
400 $file_contents{$file} : contents $file;
405 foreach (split ("\n", $contents))
408 # Remove comments from current line.
411 # Avoid running all the following regexes on white lines.
414 while (/$m4_include_rx/go)
416 my $ifile = $2 || $3;
417 # Skip missing `sinclude'd files.
418 next if $1 ne 'm4_' && ! -f $ifile;
422 while (/$ac_require_rx/go)
424 push (@rlist, $1 || $2);
427 # The search function is constructed dynamically by
428 # scan_m4_files. The last parenthetical match makes sure we
429 # don't match things that look like macro assignments or
431 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
433 # Macro not found, but AM_ prefix found.
434 # Make this just a warning, because we do not know whether
435 # the macro is actually used (it could be called conditionally).
436 msg ('unsupported', "$file:$line",
437 "warning: macro `$2' not found in library");
441 add_macro ($_) foreach (@rlist);
442 &scan_configure_dep ($_) foreach @ilist;
447 # Add $FILE to output.
452 # Only add a file once.
453 return if ($file_added{$file});
454 $file_added{$file} = 1;
456 scan_configure_dep $file;
459 # Point to the documentation for underquoted AC_DEFUN only once.
460 my $underquoted_manual_once = 0;
462 # scan_file ($TYPE, $FILE, $WHERE)
463 # --------------------------------
464 # Scan a single M4 file ($FILE), and all files it includes.
465 # Return the list of included files.
466 # $TYPE is one of FT_USER, FT_AUTOMAKE, or FT_SYSTEM, depending
467 # on where the file comes from.
468 # $WHERE is the location to use in the diagnostic if the file
472 my ($type, $file, $where) = @_;
473 my $basename = basename $file;
475 # Do not scan the same file twice.
476 return @{$file_includes{$file}} if exists $file_includes{$file};
477 # Prevent potential infinite recursion (if two files include each other).
478 return () if exists $file_contents{$file};
480 unshift @file_order, $file;
482 $file_type{$file} = $type;
484 fatal "$where: file `$file' does not exist" if ! -e $file;
486 my $fh = new Automake::XFile $file;
493 my $serial_older = 0;
495 while ($_ = $fh->getline)
503 if ($line =~ /$serial_line_rx/go)
506 if ($number !~ /$serial_number_rx/go)
508 msg ('syntax', "$file:$.",
509 "warning: ill-formed serial number `$number', "
510 . "expecting a version string with only digits and dots");
514 # aclocal removes all definitions from M4 file with the
515 # same basename if a greater serial number is found.
516 # Encountering a serial after some macros will undefine
518 msg ('syntax', "$file:$.",
519 'the serial number must appear before any macro definition');
521 # We really care about serials only for non-automake macros
522 # and when --install is used. But the above diagnostics are
523 # made regardless of this, because not using --install is
524 # not a reason not the fix macro files.
525 elsif ($install && $type != FT_AUTOMAKE)
528 my @new = split (/\./, $number);
530 verb "$file:$.: serial $number";
532 if (!exists $serial{$basename}
533 || list_compare (@new, @{$serial{$basename}}) > 0)
535 # Delete any definition we knew from the old macro.
536 foreach my $def (@{$invmap{$basename}})
538 verb "$file:$.: ignoring previous definition of $def";
541 $invmap{$basename} = [];
542 $serial{$basename} = \@new;
551 # Remove comments from current line.
552 # Do not do it earlier, because the serial line is a comment.
553 $line =~ s/\bdnl\b.*$//;
556 while ($line =~ /$ac_defun_rx/go)
561 msg ('syntax', "$file:$.", "warning: underquoted definition of $2"
562 . "\n run info '(automake)Extending aclocal'\n"
563 . " or see http://sources.redhat.com/automake/"
564 . "automake.html#Extending-aclocal")
565 unless $underquoted_manual_once;
566 $underquoted_manual_once = 1;
569 # If this macro does not have a serial and we have already
570 # seen a macro with the same basename earlier, we should
571 # ignore the macro (don't exit immediately so we can still
572 # diagnose later #serial numbers and underquoted macros).
573 $serial_older ||= ($type != FT_AUTOMAKE
574 && !$serial_seen && exists $serial{$basename});
576 my $macro = $1 || $2;
577 if (!$serial_older && !defined $map{$macro})
579 verb "found macro $macro in $file: $.";
580 $map{$macro} = $file;
581 push @{$invmap{$basename}}, $macro;
585 # Note: we used to give an error here if we saw a
586 # duplicated macro. However, this turns out to be
587 # extremely unpopular. It causes actual problems which
588 # are hard to work around, especially when you must
589 # mix-and-match tool versions.
590 verb "ignoring macro $macro in $file: $.";
594 while ($line =~ /$m4_include_rx/go)
596 my $ifile = $2 || $3;
597 # Skip missing `sinclude'd files.
598 next if $1 ne 'm4_' && ! -f $ifile;
599 push (@inc_files, $ifile);
600 $inc_lines{$ifile} = $.;
604 # Ignore any file that has an old serial (or no serial if we know
605 # another one with a serial).
608 ($type != FT_AUTOMAKE && !$serial_seen && exists $serial{$basename}));
610 $file_contents{$file} = $contents;
612 # For some reason I don't understand, it does not work
613 # to do `map { scan_file ($_, ...) } @inc_files' below.
614 # With Perl 5.8.2 it undefines @inc_files.
615 my @copy = @inc_files;
616 my @all_inc_files = (@inc_files,
617 map { scan_file ($type, $_,
618 "$file:$inc_lines{$_}") } @copy);
619 $file_includes{$file} = \@all_inc_files;
620 return @all_inc_files;
623 # strip_redundant_includes (%FILES)
624 # ---------------------------------
625 # Each key in %FILES is a file that must be present in the output.
626 # However some of these files might already include other files in %FILES,
627 # so there is no point in including them another time.
628 # This removes items of %FILES which are already included by another file.
629 sub strip_redundant_includes (%)
633 # Always include acinclude.m4, even if it does not appear to be used.
634 $files{'acinclude.m4'} = 1 if -f 'acinclude.m4';
635 # File included by $configure_ac are redundant.
636 $files{$configure_ac} = 1;
638 # Files at the end of @file_order should override those at the beginning,
639 # so it is important to preserve these trailing files. We can remove
640 # a file A if it is going to be output before a file B that includes
641 # file A, not the converse.
642 foreach my $file (reverse @file_order)
644 next unless exists $files{$file};
645 foreach my $ifile (@{$file_includes{$file}})
647 next unless exists $files{$ifile};
648 delete $files{$ifile};
649 verb "$ifile is already included by $file";
653 # configure.ac is implicitly included.
654 delete $files{$configure_ac};
659 sub trace_used_macros ()
661 my %files = map { $map{$_} => 1 } keys %macro_seen;
662 %files = strip_redundant_includes %files;
664 my $traces = ($ENV{AUTOM4TE} || 'autom4te');
665 $traces .= " --language Autoconf-without-aclocal-m4 ";
666 # All candidate files.
667 $traces .= join (' ',
669 (grep { exists $files{$_} } @file_order))) . " ";
670 # All candidate macros.
671 $traces .= join (' ',
672 (map { "--trace='$_:\$f::\$n::\$1'" }
676 '_AM_AUTOCONF_VERSION')),
677 # Do not trace $1 for all other macros as we do
678 # not need it and it might contains harmful
679 # characters (like newlines).
680 (map { "--trace='$_:\$f::\$n'" } (keys %macro_seen)));
682 verb "running $traces $configure_ac";
684 my $tracefh = new Automake::XFile ("$traces $configure_ac |");
688 while ($_ = $tracefh->getline)
691 my ($file, $macro, $arg1) = split (/::/);
693 $traced{$macro} = 1 if exists $macro_seen{$macro};
695 $map_traced_defs{$arg1} = $file
696 if ($macro eq 'AC_DEFUN'
697 || $macro eq 'AC_DEFUN_ONCE'
698 || $macro eq 'AU_DEFUN');
700 $ac_version = $arg1 if $macro eq '_AM_AUTOCONF_VERSION';
708 sub scan_configure ()
710 # Make sure we include acinclude.m4 if it exists.
711 if (-f 'acinclude.m4')
713 add_file ('acinclude.m4');
715 scan_configure_dep ($configure_ac);
718 ################################################################
721 # Return 0 iff some files were installed locally.
722 sub write_aclocal ($@)
724 my ($output_file, @macros) = @_;
728 # Get the list of files containing definitions for the macros used.
729 # (Filter out unused macro definitions with $map_traced_defs. This
730 # can happen when an Autoconf macro is conditionally defined:
731 # aclocal sees the potential definition, but this definition is
732 # actually never processed and the Autoconf implementation is used
737 if (exists $map_traced_defs{$m}
738 && $map{$m} eq $map_traced_defs{$m});
740 # Do not explicitly include a file that is already indirectly included.
741 %files = strip_redundant_includes %files;
745 for my $file (grep { exists $files{$_} } @file_order)
747 # Check the time stamp of this file, and of all files it includes.
748 for my $ifile ($file, @{$file_includes{$file}})
750 my $mtime = mtime $ifile;
751 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
754 # If the file to add looks like outside the project, copy it
755 # to the output. The regex catches filenames starting with
756 # things like `/', `\', or `c:\'.
757 if ($file_type{$file} != FT_USER
758 || $file =~ m,^(?:\w:)?[\\/],)
760 if (!$install || $file_type{$file} != FT_SYSTEM)
762 # Copy the file into aclocal.m4.
763 $output .= $file_contents{$file} . "\n";
767 # Install the file (and any file it includes).
769 for my $ifile (@{$file_includes{$file}}, $file)
771 $dest = "$user_includes[0]/" . basename $ifile;
772 verb "installing $ifile to $dest";
773 install_file ($ifile, $dest);
780 # Otherwise, simply include the file.
781 $output .= "m4_include([$file])\n";
787 verb "running aclocal anew, because some files were installed locally";
791 # Nothing to output?!
792 # FIXME: Shouldn't we diagnose this?
793 return 1 if ! length ($output);
797 # Do not use "$output_file" here for the same reason we do not
798 # use it in the header below. autom4te will output the name of
799 # the file in the diagnostic anyway.
800 $output = "m4_ifndef([AC_AUTOCONF_VERSION],
801 [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
802 m4_if(AC_AUTOCONF_VERSION, [$ac_version],,
803 [m4_warning([this file was generated for autoconf $ac_version.
804 You have another version of autoconf. It may work, but is not guaranteed to.
805 If you have problems, you may need to regenerate the build system entirely.
806 To do so, use the procedure documented by the package, typically `autoreconf'.])])
811 # We used to print `# $output_file generated automatically etc.' But
812 # this creates spurious differences when using autoreconf. Autoreconf
813 # creates aclocal.m4t and then rename it to aclocal.m4, but the
814 # rebuild rules generated by Automake create aclocal.m4 directly --
815 # this would gives two ways to get the same file, with a different
816 # name in the header.
817 $output = "# generated automatically by aclocal $VERSION -*- Autoconf -*-
819 # Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
820 # 2005, 2006 Free Software Foundation, Inc.
821 # This file is free software; the Free Software Foundation
822 # gives unlimited permission to copy and/or distribute it,
823 # with or without modifications, as long as this notice is preserved.
825 # This program is distributed in the hope that it will be useful,
826 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
827 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
828 # PARTICULAR PURPOSE.
832 # We try not to update $output_file unless necessary, because
833 # doing so invalidate Autom4te's cache and therefore slows down
834 # tools called after aclocal.
836 # We need to overwrite $output_file in the following situations.
837 # * The --force option is in use.
838 # * One of the dependencies is younger.
839 # (Not updating $output_file in this situation would cause
840 # make to call aclocal in loop.)
841 # * The contents of the current file are different from what
844 && $greatest_mtime < mtime ($output_file)
845 && $output eq contents ($output_file))
847 verb "$output_file unchanged";
851 verb "writing $output_file";
855 if (-e $output_file && !unlink $output_file)
857 fatal "could not remove `$output_file': $!";
859 my $out = new Automake::XFile "> $output_file";
865 ################################################################
867 # Print usage and exit.
872 print "Usage: aclocal [OPTIONS] ...
874 Generate `aclocal.m4' by scanning `configure.ac' or `configure.in'
877 --acdir=DIR directory holding config files (for debugging)
878 --diff[=COMMAND] run COMMAND [diff -u] on M4 files that would be
879 changed (implies --install and --dry-run)
880 --dry-run pretend to, but do not actually update any file
881 --force always update output file
882 --help print this help, then exit
883 -I DIR add directory to search list for .m4 files
884 --install copy third-party files to the first -I directory
885 --output=FILE put output in FILE (default aclocal.m4)
886 --print-ac-dir print name of directory holding m4 files, then exit
887 --verbose don't be silent
888 --version print version number, then exit
889 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
891 Warning categories include:
892 `syntax' dubious syntactic constructs (default)
893 `unsupported' unknown macros (default)
894 `all' all the warnings (default)
895 `no-CATEGORY' turn off warnings in CATEGORY
896 `none' turn off all the warnings
897 `error' treat warnings as errors
899 Report bugs to <bug-automake\@gnu.org>.\n";
904 # Print version and exit.
908 aclocal (GNU $PACKAGE) $VERSION
909 Copyright (C) 2007 Free Software Foundation, Inc.
910 License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
911 This is free software: you are free to change and redistribute it.
912 There is NO WARRANTY, to the extent permitted by law.
914 Written by Tom Tromey <tromey\@redhat.com>
915 and Alexandre Duret-Lutz <adl\@gnu.org>.
920 # Parse command line.
921 sub parse_arguments ()
923 my $print_and_exit = 0;
928 'acdir=s' => sub # Setting --acdir overrides both the
929 { # automake (versioned) directory and the
930 # public (unversioned) system directory.
931 @automake_includes = ();
932 @system_includes = ($_[1])
934 'diff:s' => \$diff_command,
935 'dry-run' => \$dry_run,
936 'force' => \$force_output,
937 'I=s' => \@user_includes,
938 'install' => \$install,
939 'output=s' => \$output_file,
940 'print-ac-dir' => \$print_and_exit,
941 'verbose' => sub { setup_channel 'verb', silent => 0; },
942 'W|warnings=s' => \&parse_warnings,
945 Getopt::Long::config ("bundling", "pass_through");
947 # See if --version or --help is used. We want to process these before
948 # anything else because the GNU Coding Standards require us to
949 # `exit 0' after processing these options, and we can't guarantee this
950 # if we treat other options first. (Handling other options first
951 # could produce error diagnostics, and in this condition it is
952 # confusing if aclocal does `exit 0'.)
953 my %cli_options_1st_pass =
955 'version' => \&version,
956 'help' => sub { usage(0); },
957 # Recognize all other options (and their arguments) but do nothing.
958 map { $_ => sub {} } (keys %cli_options)
960 my @ARGV_backup = @ARGV;
961 Getopt::Long::GetOptions %cli_options_1st_pass
963 @ARGV = @ARGV_backup;
965 # Now *really* process the options. This time we know that --help
966 # and --version are not present, but we specify them nonetheless so
967 # that ambiguous abbreviation are diagnosed.
968 Getopt::Long::GetOptions %cli_options, 'version' => sub {}, 'help' => sub {}
974 for my $k (keys %cli_options)
978 map { $argopts{(length ($_) == 1)
979 ? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
982 if (exists $argopts{$ARGV[0]})
984 fatal ("option `$ARGV[0]' requires an argument\n"
985 . "Try `$0 --help' for more information.");
989 fatal ("unrecognized option `$ARGV[0]'\n"
990 . "Try `$0 --help' for more information.");
996 print "@system_includes\n";
1000 if (defined $diff_command)
1002 $diff_command = 'diff -u' if $diff_command eq '';
1003 @diff_command = split (' ', $diff_command);
1008 if ($install && !@user_includes)
1010 fatal ("--install should copy macros in the directory indicated by the"
1011 . "\nfirst -I option, but no -I was supplied.");
1014 if (! -d $system_includes[0])
1016 # By default $(datadir)/aclocal doesn't exist. We don't want to
1017 # get an error in the case where we are searching the default
1018 # directory and it hasn't been created. (We know
1019 # @system_includes has its default value if @automake_includes
1020 # is not empty, because --acdir is the only way to change this.)
1021 @system_includes = () if @automake_includes;
1025 # Finally, adds any directory listed in the `dirlist' file.
1026 if (open (DIRLIST, "$system_includes[0]/dirlist"))
1032 # strip off newlines and end-of-line comments
1035 foreach my $dir (glob)
1037 push (@system_includes, $dir) if -d $dir;
1045 ################################################################
1047 parse_WARNINGS; # Parse the WARNINGS environment variable.
1049 $configure_ac = require_configure_ac;
1051 # We may have to rerun aclocal if some file have been installed, but
1052 # it should not happen more than once. The reason we must run again
1053 # is that once the file has been moved from /usr/share/aclocal/ to the
1054 # local m4/ directory it appears at a new place in the search path,
1055 # hence it should be output at a different position in aclocal.m4. If
1056 # we did not rerun aclocal, the next run of aclocal would produce a
1057 # different aclocal.m4.
1062 prog_error "Too many loops." if $loop > 2;
1068 my %macro_traced = trace_used_macros;
1069 last if write_aclocal ($output_file, keys %macro_traced);
1076 ### Setup "GNU" style for perl-mode and cperl-mode.
1078 ## perl-indent-level: 2
1079 ## perl-continued-statement-offset: 2
1080 ## perl-continued-brace-offset: 0
1081 ## perl-brace-offset: 0
1082 ## perl-brace-imaginary-offset: 0
1083 ## perl-label-offset: -2
1084 ## cperl-indent-level: 2
1085 ## cperl-brace-offset: 0
1086 ## cperl-continued-brace-offset: 0
1087 ## cperl-label-offset: -2
1088 ## cperl-extra-newline-before-brace: t
1089 ## cperl-merge-trailing-else: nil
1090 ## cperl-continued-statement-offset: 2