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) 1996-2017 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 @Aclocal::perl_libdirs = ('@datadir@/@PACKAGE@-@APIVERSION@')
31 unless @Aclocal::perl_libdirs;
32 unshift @INC, @Aclocal::perl_libdirs;
38 use Automake::General;
39 use Automake::Configure_ac;
40 use Automake::Channels;
41 use Automake::ChannelDefs;
43 use Automake::FileUtils;
49 # Support AC_CONFIG_MACRO_DIRS also with older autoconf.
50 # FIXME: To be removed in Automake 2.0, once we can assume autoconf
52 # FIXME: keep in sync with 'internal/ac-config-macro-dirs.m4'.
53 my $ac_config_macro_dirs_fallback =
54 'm4_ifndef([AC_CONFIG_MACRO_DIRS], [' .
55 'm4_defun([_AM_CONFIG_MACRO_DIRS], [])' .
56 'm4_defun([AC_CONFIG_MACRO_DIRS], [_AM_CONFIG_MACRO_DIRS($@)])' .
59 # We do not operate in threaded mode.
62 # Include paths for searching macros. We search macros in this order:
63 # user-supplied directories first, then the directory containing the
64 # automake macros, and finally the system-wide directories for
66 # @user_includes can be augmented with -I or AC_CONFIG_MACRO_DIRS.
67 # @automake_includes can be reset with the '--automake-acdir' option.
68 # @system_includes can be augmented with the 'dirlist' file or the
69 # ACLOCAL_PATH environment variable, and reset with the '--system-acdir'
71 my @user_includes = ();
72 my @automake_includes = ('@datadir@/aclocal-' . $APIVERSION);
73 my @system_includes = ('@datadir@/aclocal');
75 # Whether we should copy M4 file in $user_includes[0].
84 # configure.ac or configure.in.
88 my $output_file = 'aclocal.m4';
93 # Modification time of the youngest dependency.
94 my $greatest_mtime = 0;
96 # Which macros have been seen.
99 # Remember the order into which we scanned the files.
100 # It's important to output the contents of aclocal.m4 in the opposite order.
101 # (Definitions in first files we have scanned should override those from
102 # later files. So they must appear last in the output.)
105 # Map macro names to file names.
108 # Ditto, but records the last definition of each macro as returned by --trace.
109 my %map_traced_defs = ();
111 # Map basenames to macro names.
114 # Map file names to file contents.
115 my %file_contents = ();
117 # Map file names to file types.
119 use constant FT_USER => 1;
120 use constant FT_AUTOMAKE => 2;
121 use constant FT_SYSTEM => 3;
123 # Map file names to included files (transitively closed).
124 my %file_includes = ();
126 # Files which have already been added.
129 # Files that have already been scanned.
130 my %scanned_configure_dep = ();
132 # Serial numbers, for files that have one.
133 # The key is the basename of the file,
134 # the value is the serial number represented as a list.
137 # Matches a macro definition.
138 # AC_DEFUN([macroname], ...)
140 # AC_DEFUN(macroname, ...)
141 # When macroname is '['-quoted , we accept any character in the name,
142 # except ']'. Otherwise macroname stops on the first ']', ',', ')',
143 # or '\n' encountered.
145 "(?:AU_ALIAS|A[CU]_DEFUN|AC_DEFUN_ONCE)\\((?:\\[([^]]+)\\]|([^],)\n]+))";
147 # Matches an AC_REQUIRE line.
148 my $ac_require_rx = "AC_REQUIRE\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
150 # Matches an m4_include line.
151 my $m4_include_rx = "(m4_|m4_s|s)include\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
153 # Match a serial number.
154 my $serial_line_rx = '^#\s*serial\s+(\S*)';
155 my $serial_number_rx = '^\d+(?:\.\d+)*$';
157 # Autoconf version. This variable is set by 'trace_used_macros'.
160 # User directory containing extra m4 files for macros definition,
161 # as extracted from calls to the macro AC_CONFIG_MACRO_DIRS.
162 # This variable is updated by 'trace_used_macros'.
163 my @ac_config_macro_dirs;
165 # If set, names a temporary file that must be erased on abnormal exit.
168 # Constants for the $ERR_LEVEL parameter of the 'scan_m4_dirs' function.
169 use constant SCAN_M4_DIRS_SILENT => 0;
170 use constant SCAN_M4_DIRS_WARN => 1;
171 use constant SCAN_M4_DIRS_ERROR => 2;
173 ################################################################
175 # Prototypes for all subroutines.
177 #! Prototypes here will automatically be generated by the build system.
179 ################################################################
181 # Erase temporary file ERASE_ME. Handle signals.
188 verb "caught SIG$sig, bailing out";
190 if (defined $erase_me && -e $erase_me && !unlink ($erase_me))
192 fatal "could not remove '$erase_me': $!";
196 # reraise default handler.
199 $SIG{$sig} = 'DEFAULT';
204 $SIG{'INT'} = $SIG{'TERM'} = $SIG{'QUIT'} = $SIG{'HUP'} = 'unlink_tmp';
212 if -d $dir or eval { File::Path::mkpath $dir };
214 $@ =~ s/\s+at\s.*\bline\s\d+.*$//;
215 fatal "could not create directory '$dir': $@";
218 # Check macros in acinclude.m4. If one is not used, warn.
219 sub check_acinclude ()
221 foreach my $key (keys %map)
223 # FIXME: should print line number of acinclude.m4.
224 msg ('syntax', "macro '$key' defined in acinclude.m4 but never used")
225 if $map{$key} eq 'acinclude.m4' && ! exists $macro_seen{$key};
235 %map_traced_defs = ();
240 %scanned_configure_dep = ();
246 # install_file ($SRC, $DESTDIR)
247 sub install_file ($$)
249 my ($src, $destdir) = @_;
250 my $dest = $destdir . "/" . basename ($src);
253 verb "installing $src to $dest";
256 || !exists $file_contents{$dest}
257 || $file_contents{$src} ne $file_contents{$dest})
261 msg 'note', "overwriting '$dest' with '$src'";
266 msg 'note', "installing '$dest' from '$src'";
271 if (! defined $diff_dest)
273 # $dest does not exist. We create an empty one just to
274 # run diff, and we erase it afterward. Using the real
275 # the destination file (rather than a temporary file) is
276 # good when diff is run with options that display the
279 # If creating $dest fails, fall back to /dev/null. At
280 # least one diff implementation (Tru64's) cannot deal
281 # with /dev/null. However working around this is not
282 # worth the trouble since nobody run aclocal on a
283 # read-only tree anyway.
285 my $f = new IO::File "> $dest";
289 $diff_dest = '/dev/null';
297 my @cmd = (@diff_command, $diff_dest, $src);
299 verb "running: @cmd";
300 my $res = system (@cmd);
301 Automake::FileUtils::handle_exec_errors "@cmd", 1
308 xsystem ('cp', $src, $dest);
313 # Compare two lists of numbers.
314 sub list_compare (\@\@)
322 return (0 == @r) ? 0 : -1;
328 elsif ($l[0] < $r[0])
332 elsif ($l[0] > $r[0])
341 ################################################################
343 # scan_m4_dirs($TYPE, $ERR_LEVEL, @DIRS)
344 # -----------------------------------------------
345 # Scan all M4 files installed in @DIRS for new macro definitions.
346 # Register each file as of type $TYPE (one of the FT_* constants).
347 # If a directory in @DIRS cannot be read:
348 # - fail hard if $ERR_LEVEL == SCAN_M4_DIRS_ERROR
349 # - just print a warning if $ERR_LEVEL == SCAN_M4_DIRS_WA
350 # - continue silently if $ERR_LEVEL == SCAN_M4_DIRS_SILENT
351 sub scan_m4_dirs ($$@)
353 my ($type, $err_level, @dirlist) = @_;
355 foreach my $m4dir (@dirlist)
357 if (! opendir (DIR, $m4dir))
359 # TODO: maybe avoid complaining only if errno == ENONENT?
360 my $message = "couldn't open directory '$m4dir': $!";
362 if ($err_level == SCAN_M4_DIRS_ERROR)
366 elsif ($err_level == SCAN_M4_DIRS_WARN)
368 msg ('unsupported', $message);
371 elsif ($err_level == SCAN_M4_DIRS_SILENT)
373 next; # Silently ignore.
377 prog_error "invalid \$err_level value '$err_level'";
381 # We reverse the directory contents so that foo2.m4 gets
382 # used in preference to foo1.m4.
383 foreach my $file (reverse sort grep (! /^\./, readdir (DIR)))
385 # Only examine .m4 files.
386 next unless $file =~ /\.m4$/;
388 # Skip some files when running out of srcdir.
389 next if $file eq 'aclocal.m4';
391 my $fullfile = File::Spec->canonpath ("$m4dir/$file");
392 scan_file ($type, $fullfile, 'aclocal');
398 # Scan all the installed m4 files and construct a map.
401 # First, scan configure.ac. It may contain macro definitions,
402 # or may include other files that define macros.
403 scan_file (FT_USER, $configure_ac, 'aclocal');
405 # Then, scan acinclude.m4 if it exists.
406 if (-f 'acinclude.m4')
408 scan_file (FT_USER, 'acinclude.m4', 'aclocal');
411 # Finally, scan all files in our search paths.
415 # Don't explore the same directory multiple times. This is here not
416 # only for speedup purposes. We need this when the user has e.g.
417 # specified 'ACLOCAL_AMFLAGS = -I m4' and has also set
418 # AC_CONFIG_MACRO_DIR[S]([m4]) in configure.ac. This makes the 'm4'
419 # directory to occur twice here and fail on the second call to
420 # scan_m4_dirs([m4]) when the 'm4' directory doesn't exist.
421 # TODO: Shouldn't there be rather a check in scan_m4_dirs for
423 @user_includes = uniq @user_includes;
425 # Don't complain if the first user directory doesn't exist, in case
426 # we need to create it later (can happen if '--install' was given).
427 scan_m4_dirs (FT_USER,
428 $install ? SCAN_M4_DIRS_SILENT : SCAN_M4_DIRS_WARN,
430 scan_m4_dirs (FT_USER,
432 @user_includes[1..$#user_includes]);
434 scan_m4_dirs (FT_AUTOMAKE, SCAN_M4_DIRS_ERROR, @automake_includes);
435 scan_m4_dirs (FT_SYSTEM, SCAN_M4_DIRS_ERROR, @system_includes);
437 # Construct a new function that does the searching. We use a
438 # function (instead of just evaluating $search in the loop) so that
439 # "die" is correctly and easily propagated if run.
440 my $search = "sub search {\nmy \$found = 0;\n";
441 foreach my $key (reverse sort keys %map)
443 $search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { add_macro ("' . $key
444 . '"); $found = 1; }' . "\n");
446 $search .= "return \$found;\n};\n";
448 prog_error "$@\n search is $search" if $@;
451 ################################################################
453 # Add a macro to the output.
458 # Ignore unknown required macros. Either they are not really
459 # needed (e.g., a conditional AC_REQUIRE), in which case aclocal
460 # should be quiet, or they are needed and Autoconf itself will
461 # complain when we trace for macro usage later.
462 return unless defined $map{$macro};
464 verb "saw macro $macro";
465 $macro_seen{$macro} = 1;
466 add_file ($map{$macro});
469 # scan_configure_dep ($file)
470 # --------------------------
471 # Scan a configure dependency (configure.ac, or separate m4 files)
472 # for uses of known macros and AC_REQUIREs of possibly unknown macros.
473 # Recursively scan m4_included files.
474 sub scan_configure_dep ($)
477 # Do not scan a file twice.
479 if exists $scanned_configure_dep{$file};
480 $scanned_configure_dep{$file} = 1;
482 my $mtime = mtime $file;
483 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
485 my $contents = exists $file_contents{$file} ?
486 $file_contents{$file} : contents $file;
491 foreach (split ("\n", $contents))
494 # Remove comments from current line.
497 # Avoid running all the following regexes on white lines.
500 while (/$m4_include_rx/go)
502 my $ifile = $2 || $3;
503 # Skip missing 'sinclude'd files.
504 next if $1 ne 'm4_' && ! -f $ifile;
508 while (/$ac_require_rx/go)
510 push (@rlist, $1 || $2);
513 # The search function is constructed dynamically by
514 # scan_m4_files. The last parenthetical match makes sure we
515 # don't match things that look like macro assignments or
517 if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
519 # Macro not found, but AM_ prefix found.
520 # Make this just a warning, because we do not know whether
521 # the macro is actually used (it could be called conditionally).
522 msg ('unsupported', "$file:$line",
523 "macro '$2' not found in library");
527 add_macro ($_) foreach (@rlist);
528 scan_configure_dep ($_) foreach @ilist;
533 # Add $FILE to output.
538 # Only add a file once.
539 return if ($file_added{$file});
540 $file_added{$file} = 1;
542 scan_configure_dep $file;
545 # Point to the documentation for underquoted AC_DEFUN only once.
546 my $underquoted_manual_once = 0;
548 # scan_file ($TYPE, $FILE, $WHERE)
549 # --------------------------------
550 # Scan a single M4 file ($FILE), and all files it includes.
551 # Return the list of included files.
552 # $TYPE is one of FT_USER, FT_AUTOMAKE, or FT_SYSTEM, depending
553 # on where the file comes from.
554 # $WHERE is the location to use in the diagnostic if the file
558 my ($type, $file, $where) = @_;
559 my $basename = basename $file;
561 # Do not scan the same file twice.
562 return @{$file_includes{$file}} if exists $file_includes{$file};
563 # Prevent potential infinite recursion (if two files include each other).
564 return () if exists $file_contents{$file};
566 unshift @file_order, $file;
568 $file_type{$file} = $type;
570 fatal "$where: file '$file' does not exist" if ! -e $file;
572 my $fh = new Automake::XFile $file;
579 my $serial_older = 0;
581 while ($_ = $fh->getline)
589 if ($line =~ /$serial_line_rx/go)
592 if ($number !~ /$serial_number_rx/go)
594 msg ('syntax', "$file:$.",
595 "ill-formed serial number '$number', "
596 . "expecting a version string with only digits and dots");
600 # aclocal removes all definitions from M4 file with the
601 # same basename if a greater serial number is found.
602 # Encountering a serial after some macros will undefine
604 msg ('syntax', "$file:$.",
605 'the serial number must appear before any macro definition');
607 # We really care about serials only for non-automake macros
608 # and when --install is used. But the above diagnostics are
609 # made regardless of this, because not using --install is
610 # not a reason not the fix macro files.
611 elsif ($install && $type != FT_AUTOMAKE)
614 my @new = split (/\./, $number);
616 verb "$file:$.: serial $number";
618 if (!exists $serial{$basename}
619 || list_compare (@new, @{$serial{$basename}}) > 0)
621 # Delete any definition we knew from the old macro.
622 foreach my $def (@{$invmap{$basename}})
624 verb "$file:$.: ignoring previous definition of $def";
627 $invmap{$basename} = [];
628 $serial{$basename} = \@new;
637 # Remove comments from current line.
638 # Do not do it earlier, because the serial line is a comment.
639 $line =~ s/\bdnl\b.*$//;
642 while ($line =~ /$ac_defun_rx/go)
647 msg ('syntax', "$file:$.", "underquoted definition of $2"
648 . "\n run info Automake 'Extending aclocal'\n"
649 . " or see http://www.gnu.org/software/automake/manual/"
650 . "automake.html#Extending-aclocal")
651 unless $underquoted_manual_once;
652 $underquoted_manual_once = 1;
655 # If this macro does not have a serial and we have already
656 # seen a macro with the same basename earlier, we should
657 # ignore the macro (don't exit immediately so we can still
658 # diagnose later #serial numbers and underquoted macros).
659 $serial_older ||= ($type != FT_AUTOMAKE
660 && !$serial_seen && exists $serial{$basename});
662 my $macro = $1 || $2;
663 if (!$serial_older && !defined $map{$macro})
665 verb "found macro $macro in $file: $.";
666 $map{$macro} = $file;
667 push @{$invmap{$basename}}, $macro;
671 # Note: we used to give an error here if we saw a
672 # duplicated macro. However, this turns out to be
673 # extremely unpopular. It causes actual problems which
674 # are hard to work around, especially when you must
675 # mix-and-match tool versions.
676 verb "ignoring macro $macro in $file: $.";
680 while ($line =~ /$m4_include_rx/go)
682 my $ifile = $2 || $3;
683 # Skip missing 'sinclude'd files.
684 next if $1 ne 'm4_' && ! -f $ifile;
685 push (@inc_files, $ifile);
686 $inc_lines{$ifile} = $.;
690 # Ignore any file that has an old serial (or no serial if we know
691 # another one with a serial).
694 ($type != FT_AUTOMAKE && !$serial_seen && exists $serial{$basename}));
696 $file_contents{$file} = $contents;
698 # For some reason I don't understand, it does not work
699 # to do "map { scan_file ($_, ...) } @inc_files" below.
700 # With Perl 5.8.2 it undefines @inc_files.
701 my @copy = @inc_files;
702 my @all_inc_files = (@inc_files,
703 map { scan_file ($type, $_,
704 "$file:$inc_lines{$_}") } @copy);
705 $file_includes{$file} = \@all_inc_files;
706 return @all_inc_files;
709 # strip_redundant_includes (%FILES)
710 # ---------------------------------
711 # Each key in %FILES is a file that must be present in the output.
712 # However some of these files might already include other files in %FILES,
713 # so there is no point in including them another time.
714 # This removes items of %FILES which are already included by another file.
715 sub strip_redundant_includes (%)
719 # Always include acinclude.m4, even if it does not appear to be used.
720 $files{'acinclude.m4'} = 1 if -f 'acinclude.m4';
721 # File included by $configure_ac are redundant.
722 $files{$configure_ac} = 1;
724 # Files at the end of @file_order should override those at the beginning,
725 # so it is important to preserve these trailing files. We can remove
726 # a file A if it is going to be output before a file B that includes
727 # file A, not the converse.
728 foreach my $file (reverse @file_order)
730 next unless exists $files{$file};
731 foreach my $ifile (@{$file_includes{$file}})
733 next unless exists $files{$ifile};
734 delete $files{$ifile};
735 verb "$ifile is already included by $file";
739 # configure.ac is implicitly included.
740 delete $files{$configure_ac};
745 sub trace_used_macros ()
747 my %files = map { $map{$_} => 1 } keys %macro_seen;
748 %files = strip_redundant_includes %files;
750 # When AC_CONFIG_MACRO_DIRS is used, avoid possible spurious warnings
751 # from autom4te about macros being "m4_require'd but not m4_defun'd";
752 # for more background, see:
753 # http://lists.gnu.org/archive/html/autoconf-patches/2012-11/msg00004.html
754 # as well as autoconf commit 'v2.69-44-g1ed0548', "warn: allow aclocal
755 # to silence m4_require warnings".
756 my $early_m4_code .= "m4_define([m4_require_silent_probe], [-])";
758 my $traces = ($ENV{AUTOM4TE} || '@am_AUTOM4TE@');
759 $traces .= " --language Autoconf-without-aclocal-m4 ";
760 $traces = "echo '$early_m4_code' | $traces - ";
762 # Support AC_CONFIG_MACRO_DIRS also with older autoconf.
763 # Note that we can't use '$ac_config_macro_dirs_fallback' here, because
764 # a bug in option parsing code of autom4te 2.68 and earlier will cause
765 # it to read standard input last, even if the "-" argument is specified
767 # FIXME: To be removed in Automake 2.0, once we can assume autoconf
769 $traces .= "$automake_includes[0]/internal/ac-config-macro-dirs.m4 ";
771 # All candidate files.
772 $traces .= join (' ',
774 (grep { exists $files{$_} } @file_order))) . " ";
776 # All candidate macros.
777 $traces .= join (' ',
778 (map { "--trace='$_:\$f::\$n::\${::}%'" }
782 '_AM_AUTOCONF_VERSION',
783 'AC_CONFIG_MACRO_DIR_TRACE',
784 # FIXME: Tracing the next two macros is a hack for
785 # compatibility with older autoconf. Remove this in
786 # Automake 2.0, when we can assume Autoconf 2.70 or
788 'AC_CONFIG_MACRO_DIR',
789 '_AM_CONFIG_MACRO_DIRS')),
790 # Do not trace $1 for all other macros as we do
791 # not need it and it might contains harmful
792 # characters (like newlines).
793 (map { "--trace='$_:\$f::\$n'" } (keys %macro_seen)));
795 verb "running $traces $configure_ac";
797 my $tracefh = new Automake::XFile ("$traces $configure_ac |");
799 @ac_config_macro_dirs = ();
803 while ($_ = $tracefh->getline)
806 my ($file, $macro, $arg1) = split (/::/);
808 $traced{$macro} = 1 if exists $macro_seen{$macro};
810 if ($macro eq 'AC_DEFUN' || $macro eq 'AC_DEFUN_ONCE'
811 || $macro eq 'AU_DEFUN')
813 $map_traced_defs{$arg1} = $file;
815 elsif ($macro eq '_AM_AUTOCONF_VERSION')
819 elsif ($macro eq 'AC_CONFIG_MACRO_DIR_TRACE')
821 push @ac_config_macro_dirs, $arg1;
823 # FIXME: We still need to trace AC_CONFIG_MACRO_DIR
824 # for compatibility with older autoconf. Remove this
825 # once we can assume Autoconf 2.70 or later.
826 elsif ($macro eq 'AC_CONFIG_MACRO_DIR')
828 @ac_config_macro_dirs = ($arg1);
830 # FIXME:This is an hack for compatibility with older autoconf.
831 # Remove this once we can assume Autoconf 2.70 or later.
832 elsif ($macro eq '_AM_CONFIG_MACRO_DIRS')
834 # Empty leading/trailing fields might be produced by split,
835 # hence the grep is really needed.
836 push @ac_config_macro_dirs, grep (/./, (split /\s+/, $arg1));
840 # FIXME: in Autoconf >= 2.70, AC_CONFIG_MACRO_DIR calls
841 # AC_CONFIG_MACRO_DIR_TRACE behind the scenes, which could
842 # leave unwanted duplicates in @ac_config_macro_dirs.
843 # Remove this in Automake 2.0, when we'll stop tracing
844 # AC_CONFIG_MACRO_DIR explicitly.
845 @ac_config_macro_dirs = uniq @ac_config_macro_dirs;
852 sub scan_configure ()
854 # Make sure we include acinclude.m4 if it exists.
855 if (-f 'acinclude.m4')
857 add_file ('acinclude.m4');
859 scan_configure_dep ($configure_ac);
862 ################################################################
865 # Return 0 iff some files were installed locally.
866 sub write_aclocal ($@)
868 my ($output_file, @macros) = @_;
872 # Get the list of files containing definitions for the macros used.
873 # (Filter out unused macro definitions with $map_traced_defs. This
874 # can happen when an Autoconf macro is conditionally defined:
875 # aclocal sees the potential definition, but this definition is
876 # actually never processed and the Autoconf implementation is used
881 if (exists $map_traced_defs{$m}
882 && $map{$m} eq $map_traced_defs{$m});
884 # Do not explicitly include a file that is already indirectly included.
885 %files = strip_redundant_includes %files;
889 for my $file (grep { exists $files{$_} } @file_order)
891 # Check the time stamp of this file, and of all files it includes.
892 for my $ifile ($file, @{$file_includes{$file}})
894 my $mtime = mtime $ifile;
895 $greatest_mtime = $mtime if $greatest_mtime < $mtime;
898 # If the file to add looks like outside the project, copy it
899 # to the output. The regex catches filenames starting with
900 # things like '/', '\', or 'c:\'.
901 if ($file_type{$file} != FT_USER
902 || $file =~ m,^(?:\w:)?[\\/],)
904 if (!$install || $file_type{$file} != FT_SYSTEM)
906 # Copy the file into aclocal.m4.
907 $output .= $file_contents{$file} . "\n";
911 # Install the file (and any file it includes).
913 for my $ifile (@{$file_includes{$file}}, $file)
915 install_file ($ifile, $user_includes[0]);
922 # Otherwise, simply include the file.
923 $output .= "m4_include([$file])\n";
929 verb "running aclocal anew, because some files were installed locally";
933 # Nothing to output?!
934 # FIXME: Shouldn't we diagnose this?
935 return 1 if ! length ($output);
939 # Do not use "$output_file" here for the same reason we do not
940 # use it in the header below. autom4te will output the name of
941 # the file in the diagnostic anyway.
942 $output = "m4_ifndef([AC_AUTOCONF_VERSION],
943 [m4_copy([m4_PACKAGE_VERSION], [AC_AUTOCONF_VERSION])])dnl
944 m4_if(m4_defn([AC_AUTOCONF_VERSION]), [$ac_version],,
945 [m4_warning([this file was generated for autoconf $ac_version.
946 You have another version of autoconf. It may work, but is not guaranteed to.
947 If you have problems, you may need to regenerate the build system entirely.
948 To do so, use the procedure documented by the package, typically 'autoreconf'.])])
953 # We used to print "# $output_file generated automatically etc." But
954 # this creates spurious differences when using autoreconf. Autoreconf
955 # creates aclocal.m4t and then rename it to aclocal.m4, but the
956 # rebuild rules generated by Automake create aclocal.m4 directly --
957 # this would gives two ways to get the same file, with a different
958 # name in the header.
959 $output = "# generated automatically by aclocal $VERSION -*- Autoconf -*-
961 # Copyright (C) 1996-$RELEASE_YEAR Free Software Foundation, Inc.
963 # This file is free software; the Free Software Foundation
964 # gives unlimited permission to copy and/or distribute it,
965 # with or without modifications, as long as this notice is preserved.
967 # This program is distributed in the hope that it will be useful,
968 # but WITHOUT ANY WARRANTY, to the extent permitted by law; without
969 # even the implied warranty of MERCHANTABILITY or FITNESS FOR A
970 # PARTICULAR PURPOSE.
972 $ac_config_macro_dirs_fallback
975 # We try not to update $output_file unless necessary, because
976 # doing so invalidate Autom4te's cache and therefore slows down
977 # tools called after aclocal.
979 # We need to overwrite $output_file in the following situations.
980 # * The --force option is in use.
981 # * One of the dependencies is younger.
982 # (Not updating $output_file in this situation would cause
983 # make to call aclocal in loop.)
984 # * The contents of the current file are different from what
987 && $greatest_mtime < mtime ($output_file)
988 && $output eq contents ($output_file))
990 verb "$output_file unchanged";
994 verb "writing $output_file";
998 if (-e $output_file && !unlink $output_file)
1000 fatal "could not remove '$output_file': $!";
1002 my $out = new Automake::XFile "> $output_file";
1008 ################################################################
1010 # Print usage and exit.
1016 Usage: aclocal [OPTION]...
1018 Generate 'aclocal.m4' by scanning 'configure.ac' or 'configure.in'
1021 --automake-acdir=DIR directory holding automake-provided m4 files
1022 --system-acdir=DIR directory holding third-party system-wide files
1023 --diff[=COMMAND] run COMMAND [diff -u] on M4 files that would be
1024 changed (implies --install and --dry-run)
1025 --dry-run pretend to, but do not actually update any file
1026 --force always update output file
1027 --help print this help, then exit
1028 -I DIR add directory to search list for .m4 files
1029 --install copy third-party files to the first -I directory
1030 --output=FILE put output in FILE (default aclocal.m4)
1031 --print-ac-dir print name of directory holding system-wide
1032 third-party m4 files, then exit
1033 --verbose don't be silent
1034 --version print version number, then exit
1035 -W, --warnings=CATEGORY report the warnings falling in CATEGORY
1037 Warning categories include:
1038 syntax dubious syntactic constructs (default)
1039 unsupported unknown macros (default)
1040 all all the warnings (default)
1041 no-CATEGORY turn off warnings in CATEGORY
1042 none turn off all the warnings
1043 error treat warnings as errors
1045 Report bugs to <@PACKAGE_BUGREPORT@>.
1046 GNU Automake home page: <@PACKAGE_URL@>.
1047 General help using GNU software: <http://www.gnu.org/gethelp/>.
1052 # Print version and exit.
1056 aclocal (GNU $PACKAGE) $VERSION
1057 Copyright (C) $RELEASE_YEAR Free Software Foundation, Inc.
1058 License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
1059 This is free software: you are free to change and redistribute it.
1060 There is NO WARRANTY, to the extent permitted by law.
1062 Written by Tom Tromey <tromey\@redhat.com>
1063 and Alexandre Duret-Lutz <adl\@gnu.org>.
1068 # Parse command line.
1069 sub parse_arguments ()
1071 my $print_and_exit = 0;
1076 'help' => sub { usage(0); },
1077 'version' => \&version,
1078 'system-acdir=s' => sub { shift; @system_includes = @_; },
1079 'automake-acdir=s' => sub { shift; @automake_includes = @_; },
1080 'diff:s' => \$diff_command,
1081 'dry-run' => \$dry_run,
1082 'force' => \$force_output,
1083 'I=s' => \@user_includes,
1084 'install' => \$install,
1085 'output=s' => \$output_file,
1086 'print-ac-dir' => \$print_and_exit,
1087 'verbose' => sub { setup_channel 'verb', silent => 0; },
1088 'W|warnings=s' => \&parse_warnings,
1091 use Automake::Getopt ();
1092 Automake::Getopt::parse_options %cli_options;
1096 fatal ("non-option arguments are not accepted: '$ARGV[0]'.\n"
1097 . "Try '$0 --help' for more information.");
1100 if ($print_and_exit)
1102 print "@system_includes\n";
1106 if (defined $diff_command)
1108 $diff_command = 'diff -u' if $diff_command eq '';
1109 @diff_command = split (' ', $diff_command);
1114 # Finally, adds any directory listed in the 'dirlist' file.
1115 if (open (DIRLIST, "$system_includes[0]/dirlist"))
1121 # strip off newlines and end-of-line comments
1124 foreach my $dir (glob)
1126 push (@system_includes, $dir) if -d $dir;
1133 # Add any directory listed in the 'ACLOCAL_PATH' environment variable
1134 # to the list of system include directories.
1135 sub parse_ACLOCAL_PATH ()
1137 return if not defined $ENV{"ACLOCAL_PATH"};
1138 # Directories in ACLOCAL_PATH should take precedence over system
1139 # directories, so we use unshift. However, directories that
1140 # come first in ACLOCAL_PATH take precedence over directories
1141 # coming later, which is why the result of split is reversed.
1142 foreach my $dir (reverse split /:/, $ENV{"ACLOCAL_PATH"})
1144 unshift (@system_includes, $dir) if $dir ne '' && -d $dir;
1148 ################################################################
1150 parse_WARNINGS; # Parse the WARNINGS environment variable.
1153 $configure_ac = require_configure_ac;
1155 # We may have to rerun aclocal if some file have been installed, but
1156 # it should not happen more than once. The reason we must run again
1157 # is that once the file has been moved from /usr/share/aclocal/ to the
1158 # local m4/ directory it appears at a new place in the search path,
1159 # hence it should be output at a different position in aclocal.m4. If
1160 # we did not rerun aclocal, the next run of aclocal would produce a
1161 # different aclocal.m4.
1163 my $rerun_due_to_macrodir = 0;
1167 prog_error "too many loops" if $loop > 2 + $rerun_due_to_macrodir;
1173 my %macro_traced = trace_used_macros;
1175 if (!$rerun_due_to_macrodir && @ac_config_macro_dirs)
1177 # The directory specified in calls to the AC_CONFIG_MACRO_DIRS
1178 # m4 macro (if any) must go after the user includes specified
1179 # explicitly with the '-I' option.
1180 push @user_includes, @ac_config_macro_dirs;
1181 # We might have to scan some new directory of .m4 files.
1182 $rerun_due_to_macrodir++;
1186 if ($install && !@user_includes)
1188 fatal "installation of third-party macros impossible without " .
1189 "-I options nor AC_CONFIG_MACRO_DIR{,S} m4 macro(s)";
1192 last if write_aclocal ($output_file, keys %macro_traced);
1199 ### Setup "GNU" style for perl-mode and cperl-mode.
1201 ## perl-indent-level: 2
1202 ## perl-continued-statement-offset: 2
1203 ## perl-continued-brace-offset: 0
1204 ## perl-brace-offset: 0
1205 ## perl-brace-imaginary-offset: 0
1206 ## perl-label-offset: -2
1207 ## cperl-indent-level: 2
1208 ## cperl-brace-offset: 0
1209 ## cperl-continued-brace-offset: 0
1210 ## cperl-label-offset: -2
1211 ## cperl-extra-newline-before-brace: t
1212 ## cperl-merge-trailing-else: nil
1213 ## cperl-continued-statement-offset: 2