#!@PERL@
# -*- perl -*-
# @configure_input@

eval 'exec /usr/local/bin/perl -S $0 ${1+"$@"}'
    if $running_under_some_shell;

# automake - create Makefile.in from Makefile.am
# Copyright (C) 1994 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.

# Originally written by David Mackenzie <djm@gnu.ai.mit.edu>.
# Perl reimplementation by Tom Tromey <tromey@drip.colorado.edu>.


# Parameters set by configure.  Not to be changed.
$VERSION = "@VERSION@";
$prefix = "@prefix@";
$am_dir = "@datadir@/@PACKAGE@";

# String constants.
$IGNORE_PATTERN = "^##([^#].*)?\$";
$WHITE_PATTERN = "^[ \t]*\$";
$COMMENT_PATTERN = "^#";
$RULE_PATTERN = "^([a-zA-Z_.][-.a-zA-Z0-9_.]*) *:";
$MACRO_PATTERN = "^([A-Za-z][A-Za-z0-9_]*)[ \t]*=[ \t]*(.*)\$";


# Constants to define the "strictness" level.
$NORMAL = 0;
$GNU = 1;
$GNITS = 2;



# Variables global to entire run.

# Strictness level.
$strictness = $NORMAL;

# This is TRUE if GNU make specific automatic dependency generation
# code should be included in generated Makefile.in.
$use_dependencies = 1;

# This holds our (eventual) exit status.  We don't actually exit until
# we have processed all input files.
$exit_status = 0;

# From the Perl manual.
$symlink_exists = (eval 'symlink ("", "");', $@ eq '');

# TRUE if missing standard files should be installed.
$install_missing = 0;



&initialize_global_constants;

# Parse command line.
@input_files = &parse_arguments (@ARGV);

# Now do all the work on each file.
foreach $am_file (@input_files)
{
    if (! -f ($am_file . '.am'))
    {
	&am_error ('no such file');
    }
    else
    {
	&generate_makefile ($am_file);
    }
}

exit $exit_status;


################################################################

# Parse command line.
sub parse_arguments
{
    local (@arglist) = @_;
    local (@make_list);

    while ($#arglist >= 0)
    {
	if ($arglist[0] eq "--version")
	{
	    print "Automake version $VERSION\n";
	    exit 0;
	}
	elsif ($arglist[0] eq "--help")
	{
	    &usage;
	}
	elsif ($arglist[0] =~ /^--amdir=(.+)$/)
	{
	    $am_dir = $1;
	}
	elsif ($arglist[0] eq '--amdir')
	{
	    &require_argument (@arglist);
	    shift (@arglist);
	    $am_dir = $arglist[0];
	}
	elsif ($arglist[0] =~ /^--strictness=(.+)$/)
	{
	    &set_strictness ($1);
	}
	elsif ($arglist[0] eq '--strictness')
	{
	    &require_argument (@arglist);
	    shift (@arglist);
	    &set_strictness ($arglist[0]);
	}
	elsif ($arglist[0] eq '--include-deps')
	{
	    $use_dependencies = 0;
	}
	elsif ($arglist[0] =~ /^--output-dir=(.*)$/)
	{
	    # Set output directory.
	    $output_directory = $1;
	}
	elsif ($arglist[0] eq '--output-dir')
	{
	    &require_argument (@arglist);
	    shift (@arglist);
	    $output_directory = $arglist[0];
	}
	elsif ($arglist[0] eq '--install-missing')
	{
	    $install_missing = 1;
	}
	elsif ($arglist[0] eq '--')
	{
	    # Stop option processing.
	    shift (@arglist);
	    push (@make_list, @arglist);
	    last;
	}
	elsif ($arglist[0] =~ /^-/)
	{
	    die "automake: unrecognized option -- \`$arglist[0]'\n";
	}
	else
	{
	    push (@make_list, $arglist[0]);
	}

	shift (@arglist);
    }

    if ($#make_list < 0)
    {
	# Look around for some files.
	push (@make_list, 'Makefile') if -f 'Makefile.am';

	foreach (<*/Makefile.am>)
	{
	    s/\.am$//;
	    push (@make_list, $_);
	}

	die "automake: no \"Makefile.am\" found or specified\n"
	    if $#make_list < 0;
    }

    return (@make_list);
}

# Ensure argument exists, or die.
sub require_argument
{
    local ($arg, @arglist) = @_;
    die "automake: no argument given for option \`$arg'\n"
	if $#arglist >= 0;
}

################################################################

# Generate a Makefile.in given the name of the corresponding Makefile.
sub generate_makefile
{
    local ($makefile) = @_;

    print "creating ", $makefile, ".in\n";

    &initialize_per_input;
    $relative_dir = &dirname ($makefile);
    # FIXME with new 'dist' target, don't need Makefile.in.  Probably
    # should remove it here.
    &push_dist_common ('Makefile.in', 'Makefile.am');
    push (@sources, '$(SOURCES)') if defined $contents{'SOURCES'};
    push (@objects, '$(OBJECTS)') if defined $contents{'OBJECTS'};

    # This is always the default target.  This gives us freedom to do
    # things in whatever order is convenient.
    $output_rules .= "default: all\n\n";
    push (@phony, 'default');

    &read_am_file ($makefile . '.am');

    # Check first, because we might modify some state.
    &check_gnu_standards;
    &check_gnits_standards;

    &handle_libraries;
    &handle_programs;
    &handle_scripts;

    # Re-init SOURCES and OBJECTS.  FIXME other code shouldn't depend
    # on this (but currently does).
    $contents{'SOURCES'} = join (' ', @sources);
    $contents{'OBJECTS'} = join (' ', @objects);

    &handle_texinfo;
    &handle_man_pages;
    &handle_data;
    &handle_headers;
    &handle_subdirs;
    &handle_configure;
    &handle_tags;
    &handle_dist;
    &handle_dependencies;
    &handle_footer;
    &handle_merge_targets;
    &handle_installdirs;
    &handle_clean;
    &handle_phony;

    if (! -d ($output_directory . '/' . $relative_dir))
    {
	&mkdir ($output_directory . '/' . $relative_dir);
    }
    if (! open (GM_FILE, "> " . $output_directory . '/' . $makefile . ".in"))
    {
	&am_error ("cannot open:", $!);
	return;
    }

    print GM_FILE $output_vars;
    print GM_FILE $output_rules;
    print GM_FILE $output_trailer;

    close (GM_FILE);
}

################################################################

# Return object extension.  Just once, put some code into the output.
sub get_object_extension
{
    if (! $dir_holds_sources)
    {

	# Boilerplate.
	$output_vars .= &file_contents ('compile-vars');
	$output_rules .= &file_contents ('compile');
	&push_phony_cleaners ('compile');

	# Check for automatic de-ANSI-fication.
	$dir_holds_sources = '.o';
	push (@suffixes, '.c', '.o');
	push (@clean, 'compile');

	if (defined $contents{'@kr@'})
	{
	    $dir_holds_sources = '.$(kr)o';
	    push (@suffixes, '._c', '._o');

	    &require_file ($NORMAL, 'ansi2knr.c');
	    &require_file ($NORMAL, 'ansi2knr.1');

	    $output_vars .= &file_contents ('kr-vars');
	    $output_rules .= &file_contents ('compile-kr');
	    $output_rules .= &file_contents ('clean-kr');

	    push (@clean, 'kr');
	    &push_phony_cleaners ('kr');
	}
    }
    return $dir_holds_sources;
}

# Handle SOURCE->OBJECT transform for one program or library.
sub handle_source_transform
{
    local ($one_file, $obj) = @_;

    # Look for file_SOURCES and file_OBJECTS.
    if (defined $contents{$one_file . "_SOURCES"})
    {
	if (! defined $contents{$one_file . "_OBJECTS"})
	{
	    # Turn sources into objects.
	    local (@files) = split (/\s+/, $contents{$one_file . "_SOURCES"});
	    # Ugh: Perl syntax vs Emacs.
	    local ($krc1, $krc2) = ('\.\$\{kr\}c', '\.\$\(kr\)c');
	    local (@result) = ();
	    foreach (@files)
	    {
		if (/^(.*)\.[yl]$/)
		{
		    # Automatically include generated .c file in
		    # distribution.
		    &push_dist_common ($1 . '.c');
		}

		# Transform source files into .o files.
		s/\.cc$/$obj/g;
		s/$krc1$/$obj/g;
		s/$krc2$/$obj/g;
		s/\.[cCmylfs]$/$obj/g;

		push (@result, $_);
	    }

	    &pretty_print ($one_file . "_OBJECTS =", '', @result);
	}
	else
	{
	    &am_error ($one_file . '_OBJECTS', 'should not be defined');
	}

	push (@sources, '$(' . $one_file . "_SOURCES)");
	push (@objects, '$(' . $one_file . "_OBJECTS)");
    }
    else
    {
	$output_vars .= ($one_file . "_SOURCES = " . $one_file . ".c\n"
			 . $one_file . "_OBJECTS = ". $one_file
			 . $obj . "\n");
	push (@sources, $one_file . '.c');
	push (@objects, $one_file . $obj);
    }

    if (defined $contents{'CONFIG_HEADER'})
    {
	$output_rules .= ('$(' . $one_file . "_OBJECTS): "
			  . $contents{'CONFIG_HEADER'} . "\n");
    }

    return @result;
}

# Handle C programs.
sub handle_programs
{
    local (@proglist) = &am_install_var ('-clean',
					 'programs', 'PROGRAMS',
					 'bin', 'sbin', 'libexec', 'noinst');
    # FIXME error if PROGRAMS defined but no blah_PROGRAMS defined.
    return if $#proglist < 0;

    local ($obj) = &get_object_extension;
    local ($one_file, $munge);
    local ($fcont) = &file_contents ('program');
    foreach $one_file (@proglist)
    {
	&handle_source_transform ($one_file, $obj);

	if (! defined $contents{$one_file . "_LDADD"})
	{
	    # User didn't define prog_LDADD override.  So do it.
	    $output_vars .= $one_file . '_LDADD = $(LDADD)' . "\n";
	}

	($munge = $fcont) =~ s/\@PROGRAM\@/$one_file/g;
	$output_rules .= $munge;
    }
}

# Handle libraries.
sub handle_libraries
{
    local (@liblist) = &am_install_var ('-no-all', '-clean',
					'libraries', 'LIBRARIES',
					'lib', 'pkglib', 'noinst');
    # FIXME error if LIBRARIES defined but no blah_LIBRARIES defined.
    return if $#liblist < 0;

    # Generate _LIBFILES variables.  Too bad we can't do this in
    # am_install_var.
    local ($onedir, $onelib);
    local (@outlist);
    foreach $onedir ('lib', 'pkglib', 'noinst')
    {
	if (defined $contents{$onedir . '_LIBRARIES'})
	{
	    @outlist = ();
	    foreach $onelib (split (/\s+/, $contents{$onedir . '_LIBRARIES'}))
	    {
		push (@outlist, 'lib' . $onelib . '.a');
	    }
	    &pretty_print ($onedir . '_LIBFILES =', '', @outlist);
	}
    }
    push (@all, '$(LIBFILES)');

    local ($obj) = &get_object_extension;
    local ($template) = &file_contents ('library');
    local ($munge);
    foreach $onelib (@liblist)
    {
	if (! defined $contents{$onelib . '_LIBADD'})
	{
	    # Generate support for conditional object inclusion in
	    # libraries.
	    $output_vars .= $onelib . "_LIBADD =\n";
	}

	&handle_source_transform ($onelib, $obj);

	($munge = $template) =~ s/\@LIBRARY\@/$onelib/g;
	$output_rules .= $munge;
    }

    # Turn "foo" into "libfoo.a" and include macro definition.
    grep (($_ = 'lib' . $_ . '.a') && 0, @liblist);

    if (! defined $contents{'LIBFILES'})
    {
	&pretty_print ('LIBFILES = ', '', @liblist);
    }
    $output_vars .= &file_contents ('libraries-vars');
}

# Handle scripts.
sub handle_scripts
{
    &am_install_var ('-clean',
		     'scripts', 'SCRIPTS',
		     'bin', 'sbin', 'libexec', 'noinst');
}

# Handle all Texinfo source.
sub handle_texinfo
{
    local ($texis) = &am_variable ('TEXINFOS');
    return if ! $texis;

    local (@texis) = split (/\s+/, $texis);
    if ($#texis > 0)
    {
	&am_error ('sorry, only one file allowed in `TEXINFOS\'');
	return;
    }

    local ($infobase);
    ($infobase = $texis[0]) =~ s/\.texi$//;

    # If 'version.texi' is referenced by input file, then include
    # automatic versioning capability.
    system ("grep version.texi " . $relative_dir . "/" . $texis[0]
	    . " > /dev/null 2>&1");
    if (! ($? >> 8))
    {
	# Got a hit.
	push (@texis, 'version.texi');
	&push_dist_common ('version.texi', 'stamp-vti');
	push (@clean, 'vti');

	local ($tfile);
	($tfile = &file_contents ('texi-version')) =~ s/\@TEXI\@/$texis[0]/g;
	$output_rules = $output_rules . $tfile;
	&push_phony_cleaners ('vti');

	&require_file ($NORMAL, 'mdate-sh');
    }

    # If user specified file_TEXINFOS, then use that as explicit
    # dependency list.
    if (defined $contents{$infobase . "_TEXINFOS"})
    {
	push (@texis, "\$" . $infobase . '_TEXINFOS');
	&push_dist_common ("\$" . $infobase . '_TEXINFOS');
    }

    if ($#texis >= 0)
    {
	$output_rules .= ($infobase . ".info: "
			  . join (' ', @texis) . "\n\n");
    }

    # Some boilerplate.
    $output_vars .= &file_contents ('texinfos-vars');
    $output_rules .= &file_contents ('texinfos');
    push (@phony, 'install-info', 'uninstall-info');

    # How to clean.
    local ($crules) = &file_contents ('texi-clean');
    $crules =~ s/\@TEXI\@/$infobase/g;
    $output_rules .= $crules;
    &push_phony_cleaners ('info');

    push (@suffixes, '.texi', '.info', '.dvi');
    push (@uninstall, 'uninstall-info');
    push (@clean, 'info');
    push (@info, '$(INFO_DEPS)');
    push (@dvi, '$(DVIS)');
    push (@installdirs, '$(infodir)');
    # Make sure documentation is made and installed first.
    unshift (@install_data, 'install-info');
    unshift (@all, 'info');

    $output_vars .= ("INFOS = " . $infobase . ".info*\n"
		     . "INFO_DEPS = " . $infobase . ".info\n"
		     . "DVIS = " . $infobase . ".dvi\n\n");

    # Do some error checking.
    &require_file ($NORMAL, 'texinfo.tex');
}

# Handle any man pages.
sub handle_man_pages
{
    return if ! defined $contents{'MANS'};

    # We generate the manpage install code by hand to avoid the use of
    # basename in the generated Makefile.
    local (@mans) = split (/\s+/, $contents{'MANS'});
    local (%sections, %inames, %secmap, %fullsecmap);
    foreach (@mans)
    {
	# FIXME: statement without effect:
	/^(.*)\.([0-9])([a-z]*)$/;
	$sections{$2} = 1;
	$inames{$1} = $_;
	$secmap{$1} = $2;
	$fullsecmap{$1} = $2 . $3;
    }

    # Generate list of install dirs.
    $output_rules .= "install-man:\n";
    foreach (keys %sections)
    {
	push (@installdirs, '$(mandir)/man' . $_);
	$output_rules .= ("\t" . '$(top_srcdir)/mkinstalldirs $(mandir)/man'
			  . $_ . "\n");
    }
    push (@phony, 'install-man');

    # Generate install target.
    local ($key);
    foreach $key (keys %inames)
    {
	$_ = $install_man_format;
	s/\@SECTION\@/$secmap{$key}/g;
	s/\@MAN\@/$inames{$key}/g;
	s/\@FULLSECT\@/$fullsecmap{$key}/g;
	s/\@MANBASE\@/$key/g;
	$output_rules .= $_;
    }
    $output_rules .= "\n";

    $output_rules .= "uninstall-man:\n";
    foreach $key (keys %inames)
    {
	$_ = $uninstall_man_format;
	s/\@SECTION\@/$secmap{$key}/g;
	s/\@MAN\@/$inames{$key}/g;
	s/\@FULLSECT\@/$fullsecmap{$key}/g;
	s/\@MANBASE\@/$key/g;
	$output_rules .= $_;
    }
    $output_rules .= "\n";
    push (@phony, 'uninstall-man');

    $output_vars .= &file_contents ('mans-vars');

    push (@install_data, 'install-man');
    push (@uninstall, 'uninstall-man');
    push (@all, '$(MANS)');
}

# Handle DATA variables.
sub handle_data
{
    &am_install_var ('data', 'DATA', 'data', 'sysconf',
		     'sharedstate', 'localstate', 'pkgdata',
		     'noinst');
}

# Handle TAGS.
sub handle_tags
{
    local ($tagging) = 0;

    push (@phony, 'tags');
    if (defined $contents{'SUBDIRS'})
    {
	$output_rules .= &file_contents ('tags');
	$tagging = 1;
    }
    elsif ($dir_holds_sources || defined $contents{'ETAGS_ARGS'})
    {
	$output_rules .= &file_contents ('tags-subd');
	push (@phony, 'id');
	$tagging = 1;
    }

    if ($tagging)
    {
	$output_rules .= &file_contents ('tags-clean');
	push (@clean, 'tags');
	&push_phony_cleaners ('tags');
    }
    else
    {
	# Every Makefile must define some sort of TAGS rule.
	# Otherwise, it would be possible for a top-level "make TAGS"
	# to fail because some subdirectory failed.
	$output_rules .= "tags: TAGS\nTAGS:\n\n";
    }
}

# Handle 'dist' target.
sub handle_dist
{
    # Look for common files that should be included in distribution.
    local ($cfile);
    foreach $cfile (@common_files)
    {
	if (-f ($relative_dir . "/" . $cfile))
	{
	    &push_dist_common ($cfile);
	}
    }

    &pretty_print ("DIST_COMMON =", '', keys (%dist_common));
    $output_vars .= "\n";

    # Some boilerplate.
    $output_vars .= &file_contents ('dist-vars');
    if ($relative_dir ne '.')
    {
	# In a subdirectory.
	$output_vars .= "subdir = " . $relative_dir . "\n\n";
	$output_rules .= &file_contents ('dist-subd');
    }
    else
    {
	$output_rules .= &file_contents (defined $contents{'SUBDIRS'}
					 ? 'dist-subd-top'
					 : 'dist');
    }
    push (@phony, 'dist');
}

# Handle auto-dependency code.
sub handle_dependencies
{
    if ($use_dependencies)
    {
	# Include GNU-make-specific auto-dep code.
	if ($dir_holds_sources)
	{
	    $output_rules .= &file_contents ('depend');
	}
    }
    else
    {
	# Include any auto-generated deps that are present.
	if (-d ($relative_dir . "/.deps") && -f ($relative_dir . "/.deps/.P"))
	{
	    local ($depfile);
	    local ($gpat) = $relative_dir . "/.deps/*.P";

	    foreach $depfile (<${gpat}>)
	    {
		if (! open (DEP_FILE, $depfile))
		{
		    &am_error ("couldn't open $depfile", $!);
		    next;
		}

		# Slurp entire file.
		$output_rules .= join ('', <DEP_FILE>);

		close (DEP_FILE);
	    }

	    $output_rules .= "\n";
	}
    }
}

# Handle subdirectories.
sub handle_subdirs
{
    return if ! defined $contents{'SUBDIRS'};

    $output_rules .= &file_contents ('subdirs');

    # Push a bunch of phony targets.
    local ($phonies);
    foreach $phonies ('-data', '-exec', 'dirs')
    {
	push (@phony, 'install' . $phonies . '-recursive');
	push (@phony, 'uninstall' . $phonies . '-recursive');
    }
    foreach $phonies ('all', 'check', 'installcheck', 'info', 'dvi')
    {
	push (@phony, $phonies . '-recursive');
    }
    &push_phony_cleaners ('recursive');

    push (@all, "all-recursive");
    push (@check, "check-recursive");
    push (@installcheck, "installcheck-recursive");
    push (@info, "info-recursive");
    push (@dvi, "dvi-recursive");

    $recursive_install = 1;
}

# Handle remaking and configure stuff.
sub handle_configure
{
    if ($relative_dir ne '.')
    {
	# In subdirectory.
	$output_rules .= &file_contents ('remake-subd');
    }
    else
    {
	&require_file ($NORMAL, 'configure.in');
	# FIXME require 'configure'?  What if autoconf hasn't been run
	# yet?

	if (defined $contents{'SUBDIRS'})
	{
	    # We required AC_PROG_MAKE_SET.
	    system ("grep AC_PROG_MAKE_SET configure.in > /dev/null 2>&1");
	    if ($? >> 8)
	    {
		# Nope.
		&am_error ("AC_PROG_MAKE_SET must be used in configure.in");
	    }
	}

	if (-f 'aclocal.m4')
	{
	    $output_vars .= "ACLOCAL = aclocal.m4\n";
	    &push_dist_common ('aclocal.m4');
	}
	$output_rules .= &file_contents ('remake');

	# Look for some files we need.
	&require_file ($NORMAL, 'install-sh');
	&require_file ($NORMAL, 'mkinstalldirs');
    }

    if (defined $contents{'CONFIG_HEADER'}
	&& $contents{'CONFIG_HEADER'} !~ /\//)
    {
	# Header defined and in this directory.
	if (-f 'acconfig.h')
	{
	    $output_vars .= "ACCONFIG = acconfig.h\n";
	    &push_dist_common ('acconfig.h');
	}
	if (-f 'config.h.top')
	{
	    $output_vars .= "CONFIG_TOP = config.h.top\n";
	    &push_dist_common ('config.h.top');
	}
	if (-f 'config.h.bot')
	{
	    $output_vars .= "CONFIG_BOT = config.h.bot\n";
	    &push_dist_common ('config.h.bot');
	}

	&push_dist_common ('stamp-h.in', $contents{'CONFIG_HEADER'} . '.in');

	$output_rules .= &file_contents ('remake-hdr');
    }
}

# Handle C headers.
sub handle_headers
{
    &am_install_var ('data', 'HEADERS', 'include',
		     'oldinclude', 'pkginclude',
		     'noinst');
}

# Handle footer elements.
sub handle_footer
{
    if ($contents{'SOURCES'})
    {
	&pretty_print ('SOURCES =', '', split (/\s+/, $contents{'SOURCES'}));
    }
    if ($contents{'OBJECTS'})
    {
	&pretty_print ('OBJECTS =', '', split (/\s+/, $contents{'OBJECTS'}));
    }
    if ($contents{'SOURCES'} || $contents{'OBJECTS'})
    {
	$output_vars .= "\n";
    }

    if (defined $contents{'SUFFIXES'})
    {
	push (@suffixes, '$(SUFFIXES)');
    }

    $output_trailer .= ".SUFFIXES:\n";
    if ($#suffixes >= 0)
    {
	$output_trailer .= ".SUFFIXES: " . join (' ', @suffixes) . "\n";
    }
    $output_trailer .= &file_contents ('footer');
}

# Deal with installdirs target.
sub handle_installdirs
{
    # GNU Makefile standards recommend this.
    $output_rules .= ("installdirs:"
		      . ($recursive_install
			 ? " installdirs-recursive\n"
			 : "\n"));
    push (@phony, 'installdirs');
    if ($#installdirs >= 0)
    {
	&pretty_print_rule ("\t\$(top_srcdir)/mkinstalldirs ", "\t\t",
			    @installdirs);
    }
    $output_rules .= "\n";
}

# There are several targets which need to be merged.  This is because
# their complete definition is compiled from many parts.  Note that we
# avoid double colon rules, otherwise we'd use them instead.
sub handle_merge_targets
{
    &do_one_merge_target ('all', @all);
    &do_one_merge_target ('info', @info);
    &do_one_merge_target ('dvi', @dvi);
    push (@check, 'all');
    &do_one_merge_target ('check', @check);
    &do_one_merge_target ('installcheck', @installcheck);

    # Handle the various install targets specially.  We do this so
    # that (eg) "make install-exec" will run "install-exec-recursive"
    # if required, but "make install" won't run it twice.  Step one is
    # to see if the user specified local versions of any of the
    # targets we handle.
    if (defined $contents{'install-exec-local'})
    {
	push (@install_exec, 'install-exec-local');
    }
    if (defined $contents{'install-data-local'})
    {
	push (@install_data, 'install-data-local');
    }
    if (defined $contents{'uninstall-local'})
    {
	push (@uninstall, 'uninstall-local');
    }

    if (defined $contents{'install-local'})
    {
	&am_error ("use \`install-data' or \`install-exec', not \`install'");
    }

    # Step two: if we are doing recursive makes, write out the
    # appropriate rules.
    local (@install);
    if ($recursive_install)
    {
	push (@install, 'install-recursive');
	push (@uninstall, 'uninstall-recursive');

	if ($#install_exec >= 0)
	{
	    $output_rules .= ('install-exec-am: '
			      . join (' ', @install_exec)
			      . "\n\n");
	    @install_exec = ('install-exec-recursive', 'install-exec-am');
	    push (@install, 'install-exec-am');
	    push (@phony, 'install-exec-am');
	}
	if ($#install_data >= 0)
	{
	    $output_rules .= ('install-data-am: '
			      . join (' ', @install_data)
			      . "\n\n");
	    @install_data = ('install-data-recursive', 'install-data-am');
	    push (@install, 'install-data-am');
	    push (@phony, 'install-data-am');
	}
	if ($#uninstall >= 0)
	{
	    $output_rules .= ('uninstall-am: '
			      . join (' ', @uninstall)
			      . "\n\n");
	    @uninstall = ('uninstall-recursive', 'uninstall-am');
	    push (@phony, 'uninstall-am');
	}
    }

    # Step three: print definitions users can use.
    if ($#install_exec >= 0)
    {
	$output_rules .= ("install-exec: "
			  . join (' ', @install_exec)
			  . "\n\n");
	push (@install, 'install-exec') if !$recursive_install;
	push (@phony, 'install-exec');
    }
    if ($#install_data >= 0)
    {
	$output_rules .= ("install-data: "
			  . join (' ', @install_data)
			  . "\n\n");
	push (@install, 'install-data') if !$recursive_install;
	push (@phony, 'install-data');
    }

    $output_rules .= ('install: '
		      . join (' ', @install)
		      . "\n\t:"
		      . "\n\n"
		      . 'uninstall: '
		      . join (' ', @uninstall)
		      . "\n\n");
    push (@phony, 'install', 'uninstall');
}

# Helper for handle_merge_targets.
sub do_one_merge_target
{
    local ($name, @values) = @_;

    if (defined $contents{$name . '-local'})
    {
	# User defined local form of target.  So include it.
	push (@values, $name . '-local');
	push (@phony, $name . '-local');
    }

    $output_rules .= $name . ":";
    if ($#values >= 0)
    {
	$output_rules .= ' ' . join (' ', @values);
    }
    $output_rules .= "\n\n";
    push (@phony, $name);
}

# Handle all 'clean' targets.
sub handle_clean
{
    push (@clean, 'generic');
    $output_rules .= &file_contents ('clean');
    &push_phony_cleaners ('generic');

    local ($target) = $recursive_install ? 'clean-am' : 'clean';
    &do_one_clean_target ($target, 'mostly', '', @clean);
    &do_one_clean_target ($target, '', 'mostly', @clean);
    &do_one_clean_target ($target, 'dist', '', @clean);
    &do_one_clean_target ($target, 'maintainer-', 'dist', @clean);

    push (@phony, 'clean', 'mostlyclean', 'distclean', 'maintainer-clean');

    local (@deps);
    if ($recursive_install)
    {
	@deps = ('am', 'recursive');
	&do_one_clean_target ('', 'mostly', '', @deps);
	&do_one_clean_target ('', '', '', @deps);
	&do_one_clean_target ('', 'dist', '', @deps);
	&do_one_clean_target ('', 'maintainer-', '', @deps);
    }
}

# Helper for handle_clean.
sub do_one_clean_target
{
    local ($target, $name, $last_name, @deps) = @_;

    # Special case: if target not passed, then don't generate
    # dependency on next "lower" clean target (eg no
    # clean<-mostlyclean derivation).  In this case the target is
    # implicitly known to be 'clean'.
    local ($flag) = $target;
    $target = 'clean' if ! $flag;

    grep (($_ = $name . 'clean-' . $_) && 0, @deps);
    if ($flag)
    {
	if ($last_name || $name ne 'mostly')
	{
	    push (@deps, $last_name . $target . " ");
	}
    }
    &pretty_print_rule ($name . $target . ": ", '', @deps);

    # FIXME shouldn't we really print these messages before running
    # the dependencies?
    if ($name . $target eq 'maintainer-clean')
    {
	# Print a special warning.
	$output_rules .=
	    ("\t\@echo \"This command is intended for maintainers to use;\"\n"
	     . "\t\@echo \"it deletes files that may require special "
	     . "tools to rebuild.\"\n"
	     . "\trm -f config.status\n");
    }
    elsif ($name . $target eq 'distclean')
    {
	$output_rules .= "\trm -f config.status\n";
    }
    $output_rules .= "\n";
}

# Handle .PHONY target.
sub handle_phony
{
    &pretty_print_rule ('.PHONY:', '', @phony);
    $output_rules .= "\n";
}

################################################################

# Do any extra checking for GNU standards.
sub check_gnu_standards
{
    &require_file ($GNU, 'ChangeLog');

    if ($relative_dir eq '.')
    {
	# In top level (or only) directory.
	&require_file ($GNU, 'INSTALL', 'NEWS', 'README');
    }
}

# Do any extra checking for GNITS standards.
sub check_gnits_standards
{
}

################################################################

# Pretty-print something.  HEAD is what should be printed at the
# beginning of the first line, FILL is what should be printed at the
# beginning of every subsequent line.
sub pretty_print_internal
{
    local ($head, $fill, @values) = @_;

    local ($column) = length ($head);
    local ($result) .= $head;

    local ($bol) = 0;
    foreach (@values)
    {
	# "71" because we also print a space.
	if ($column + length ($_) > 71)
	{
	    $result .= " \\\n" . $fill;
	    $column = length ($fill);
	    $bol = 1;
	}

	$result .= ' ' unless ($bol);
	$result .= $_;
	$column += length ($_) + 1;
	$bol = 0;
    }

    $result .= "\n";
    return $result;
}

# Pretty-print something and append to output_vars.
sub pretty_print
{
    $output_vars .= &pretty_print_internal (@_);
}

# Pretty-print something and append to output_rules.
sub pretty_print_rule
{
    $output_rules .= &pretty_print_internal (@_);
}


################################################################

# Read Makefile.am and set up %contents.  Simultaneously copy lines
# from Makefile.am into $output_trailer or $output_vars as
# appropriate.  NOTE we put rules in the trailer section.  We want
# user rules to come after our generated stuff.
sub read_am_file
{
    local ($amfile) = @_;

    local ($header_vars) = &file_contents ('header-vars');

    open (AM_FILE, $amfile) || die "automake: couldn't open $amfile: $!\n";

    $output_vars .= ("# Makefile.in generated automatically by automake "
		     . $VERSION . " from Makefile.am\n");

    local ($saw_bk) = 0;
    local ($was_rule) = 0;
    local ($spacing) = '';
    local ($comment) = '';
    local ($last_var_name) = '';

    while (<AM_FILE>)
    {
	if (/$IGNORE_PATTERN/o)
	{
	    # Merely delete comments beginning with two hashes.
	}
	elsif (/$WHITE_PATTERN/o)
	{
	    # Stick a single white line before the incoming macro or rule.
	    $spacing = "\n";
	}
	elsif (/$COMMENT_PATTERN/o)
	{
	    # Stick comments before the incoming macro or rule.
	    $comment .= $spacing . $_;
	    $spacing = '';
	}
	else
	{
	    last;
	}
    }

    $output_vars .= $comment . "\n" . $header_vars;
    $comment = '';
    $spacing = "\n";

    while ($_)
    {
	if (/$IGNORE_PATTERN/o)
	{
	    # Merely delete comments beginning with two hashes.
	}
	elsif (/$WHITE_PATTERN/o)
	{
	    # Stick a single white line before the incoming macro or rule.
	    $spacing = "\n";
	}
	elsif (/$COMMENT_PATTERN/o)
	{
	    # Stick comments before the incoming macro or rule.
	    $comment .= $spacing . $_;
	    $spacing = '';
	}
	elsif ($saw_bk)
	{
	    if ($was_rule)
	    {
		$output_trailer .= $_;
		$saw_bk = /\\$/;
	    }
	    else
	    {
		$output_vars .= $_;
		if (substr ($_, -1) eq "\\")
		{
		    $contents{$last_var_name} .= substr ($_, 0,
							 length ($_) - 1);
		}
		else
		{
		    $contents{$last_var_name} .= $_;
		}
		$saw_bk = /\\$/;
	    }
	}
	elsif (/$RULE_PATTERN/o)
	{
	    # warn "** Saw rule .$1.\n";
	    # Found a rule.
	    $was_rule = 1;
	    # Value here doesn't matter; for targets we only note
	    # existence.
	    $contents{$1} = 1;
	    $output_trailer .= $comment . $spacing . $_;
	    $comment = $spacing = '';
	    $saw_bk = /\\$/;
	}
	elsif (/$MACRO_PATTERN/o)
	{
	    # warn "** Saw macro .$1.\n";
	    # Found a macro definition.
	    $was_rule = 0;
	    $last_var_name = $1;
	    if (substr ($2, -1) eq "\\")
	    {
		$contents{$1} = substr ($2, 0, length ($2) - 1);
	    }
	    else
	    {
		$contents{$1} = $2;
	    }
	    $output_vars .= $comment . $spacing . $_;
	    $comment = $spacing = '';
	    $saw_bk = /\\$/;
	}
	elsif ($_ eq "\@kr\@\n")
	{
	    # Special case: this means we want automatic
	    # de-ANSI-fication.  FIXME think of a better way.
	    $contents{'@kr@'} = 1;
	}
	else
	{
	    # This isn't an error; it is probably a continued rule.
	    # In fact, this is what we assume.
	    $was_rule = 1;
	    $output_trailer .= $comment . $spacing . $_;
	    $comment = $spacing = '';
	    $saw_bk = /\\$/;
	}

	$_ = <AM_FILE>;
    }

    $output_trailer .= $comment;
}

################################################################

sub initialize_global_constants
{
    # Associative array of standard directory names.  Entry is TRUE if
    # corresponding directory should be installed during
    # 'install-exec' phase.
    %exec_dir_p =
	('bin', 1,
	 'sbin', 1,
	 'libexec', 1,
	 'data', 0,
	 'sysconf', 1,
	 'localstate', 1,
	 'lib', 1,
	 'info', 0,
	 'man', 0,
	 'include', 0,
	 'oldinclude', 0,
	 'pkgdata', 0,
	 'pkglib', 1,
	 'pkginclude', 0
	 );

    # Helper text for dealing with man pages.
    $install_man_format =
    '	\@sect=@SECTION@;				\\
	inst=`echo "@MANBASE@" | sed \'$(transform)\'`.@FULLSECT@; \\
	echo installing @MAN@ as $(mandir)/man$$sect/$$inst; \\
	$(INSTALL_DATA) $(srcdir)/@MAN@ $(mandir)/man$$sect/$$inst
';

    $uninstall_man_format =
    '	inst=`echo "@MANBASE@" | sed \'$(transform)\'`.@FULLSECT@; \\
	rm -f $(mandir)/man@SECTION@/$$inst
';

    # Commonly found files we look for and automatically include in
    # DISTFILES.
    @common_files =
	(
	 "THANKS", "TODO", "README", "NEWS", "COPYING", "COPYING.LIB",
	 "INSTALL", "ABOUT-NLS", "ChangeLog", "configure", "configure.in",
	 "config.guess", "config.sub"
	 );

    # Commonly used files we auto-include, but only sometimes.
    @common_sometimes =
	(
	 "version.texi", "aclocal.m4", "acconfig.h", "config.h.top",
	 "config.h.bot", "stamp-h.in", "mdate-sh", "ansi2knr.c",
	 "ansi2knr.1", 'stamp-vti', "mkinstalldirs", "install-sh"
	 );

    $USAGE = "\
  --amdir=DIR           directory storing config files
  --help                print this help, then exit
  --include-deps        include generated dependencies in Makefile.in
  --install-missing     install missing standard files
  --output-dir=DIR      put generated Makefile.in's into DIR
  --strictness=LEVEL    set strictness level.  LEVEL is normal, gnu, gnits
  --version             print version number, then exit\n";
}

# (Re)-Initialize per-Makefile.am variables.
sub initialize_per_input
{
    # These two variables are used when generating each Makefile.in.
    # They hold the Makefile.in until it is ready to be printed.
    $output_rules = '';
    $output_vars = '';
    $output_trailer = '';

    # Suffixes found during a run.
    @suffixes = ();

    # This holds the contents of a Makefile.am, as parsed by
    # read_am_file.
    %contents = ();

    # This holds the "relative directory" of the current Makefile.in.
    # Eg for src/Makefile.in, this is "src".
    $relative_dir = '';

    # Directory where output files go.  Actually, output files are
    # relative to this directory.
    $output_directory = '.';

    # This holds a list of files that are included in the
    # distribution.
    %dist_common = ();

    # List of dependencies for the obvious targets.
    @install_data = ();
    @install_exec = ();
    @uninstall = ();
    @installdirs = ();

    @info = ();
    @dvi = ();
    @all = ();
    @check = ();
    @installcheck = ();
    @clean = ();

    @phony = ();

    # These are pretty obvious, too.  They are used to define the
    # SOURCES and OBJECTS variables.
    @sources = ();
    @objects = ();

    # TRUE if current directory holds any C source files.  (Actually
    # holds object extension, but this information is encapsulated in
    # the function get_object_extension).
    $dir_holds_sources = '';

    # TRUE if install targets should work recursively.
    $recursive_install = 0;
}


################################################################

# Return contents of a file from $am_dir, automatically skipping
# macros or rules which are already known.
sub file_contents
{
    local ($basename) = @_;
    local ($file) = $am_dir . '/' . $basename . '.am';

    open (FC_FILE, $file)
	|| die "automake: installation error: cannot open \"$file\"\n";

    local ($was_rule) = 0;
    local ($result_vars) = '';
    local ($result_rules) = '';
    local ($comment) = '';
    local ($spacing) = "\n";
    local ($skipping) = 0;

    while (<FC_FILE>)
    {
	if (/$IGNORE_PATTERN/o)
	{
	    # Merely delete comments beginning with two hashes.
	}
	elsif (/$WHITE_PATTERN/o)
	{
	    # Stick a single white line before the incoming macro or rule.
	    $spacing = "\n";
	}
	elsif (/$COMMENT_PATTERN/o)
	{
	    # Stick comments before the incoming macro or rule.
	    $comment .= $spacing . $_;
	    $spacing = '';
	}
	elsif ($saw_bk)
	{
	    if ($was_rule)
	    {
		$result_rules .= $_ if ! $skipping;
	    }
	    else
	    {
		$result_vars .= $_ if ! $skipping;
	    }
	    $saw_bk = /\\$/;
	}
	elsif (/$RULE_PATTERN/o)
	{
	    # warn "** Found rule .$1.\n";
	    # Found a rule.
	    $was_rule = 1;
	    $skipping = defined $contents{$1};
	    warn "** Skip $skipping\n" if $skipping;
	    $result_rules .= $comment . $spacing . $_ if ! $skipping;
	    $comment = $spacing = '';
	    $saw_bk = /\\$/;
	}
	elsif (/$MACRO_PATTERN/o)
	{
	    # warn "** Found macro .$1.\n";
	    # Found a variable reference.
	    $was_rule = 0;
	    $skipping = defined $contents{$1};
	    warn "** Skip $skipping\n" if $skipping;
	    $result_vars .= $comment . $spacing . $_ if ! $skipping;
	    $comment = $spacing = '';
	    $saw_bk = /\\$/;
	}
	else
	{
	    # This isn't an error; it is probably a continued rule.
	    # In fact, this is what we assume.
	    $was_rule = 1;
	    $result_rules .= $comment . $spacing . $_ if ! $skipping;
	    $comment = $spacing = '';
	    $saw_bk = /\\$/;
	}
    }

    close (FC_FILE);
    return $result_vars . $result_rules . $comment;
}

# Return contents of some Makefile.am variable.  Allow for AM_ style
# overrides.
sub am_variable
{
    local ($varname) = @_;

    return (defined $contents{'AM_' . $varname}
	    ? $contents{'AM_' . $varname}
	    : $contents{$varname});
}

# Handle `where_HOW' variable magic.  Does all lookups, generates
# install code,and possibly generates code to define the primary
# variable.  The first argument is the name of the .am file to munge,
# the second argument is the primary variable (eg HEADERS), and all
# subsequent arguments are possible installation locations.  Returns
# list of all values of all _HOW targets.
#
# FIXME this should be rewritten to be cleaner.  It should be broken
# up into multiple functions.
#
# Usage is: am_install_var (OPTION..., file, HOW, where...)
sub am_install_var
{
    local (@args) = @_;

    local ($do_all, $do_clean) = (1, 0);
    while ($#args >= 0)
    {
	if ($args[0] eq '-clean')
	{
	    $do_clean = 1;
	}
	elsif ($args[0] eq '-no-all')
	{
	    $do_all = 0;
	}
	elsif ($args[0] !~ /^-/)
	{
	    last;
	}
	shift (@args);
    }
    local ($file, $primary, @prefixes) = @args;

    local (@used) = ();
    local (@result) = ();

    local ($template) = &file_contents ($file);
    local ($clean_templ) = &file_contents ($file . '-clean');
    local ($munge);
    local ($one_name);
    foreach (@prefixes)
    {
	$one_name = $_ . '_' . $primary;
	if (defined $contents{$one_name})
	{
	    # Append actual contents to result.
	    push (@result, split (/\s+/, $contents{$one_name}));

	    if ($do_clean)
	    {
		($munge = $clean_templ) =~ s/\@DIR\@/$_/g;
		$output_rules .= $munge;
		push (@clean, $_ . $primary);
		&push_phony_cleaners ($_ . $primary);
	    }

	    push (@used, '$(' . $one_name . ')');
	    if ($_ eq 'noinst')
	    {
		# Objects in noinst_FOO never get installed.
		next;
	    }

	    ($munge = $template) =~ s/\@DIR\@/$_/g;
	    $output_rules .= $munge;

	    push (@uninstall, 'uninstall-' . $_ . $primary);
	    push (@phony, 'uninstall-' . $_ . $primary);
	    push (@installdirs, '$(' . $_ . 'dir)');
	    if ($exec_dir_p{$_})
	    {
		push (@install_exec, 'install-' . $_ . $primary);
	    }
	    else
	    {
		push (@install_data, 'install-' . $_ . $primary);
	    }
	}
    }

    if (! defined $contents{$primary} && $#used >= 0)
    {
	# Define it.
	&pretty_print ($primary . '=', '', @used);
	$output_vars .= "\n";
    }

    # Push here because PRIMARY might be configure time determined.
    push (@all, '$(' . $primary . ')') if ($do_all && $#used >= 0);

    # Look for misspellings.  It is an error to have a variable ending
    # in a "reserved" suffix whose prefix is unknown, eg
    # "bni_PROGRAMS".
    local (%valid, $varname);
    grep ($valid{$_} = 0, @prefixes);
    foreach $varname (keys %contents)
    {
	if ($varname =~ /^(.*)_$primary$/ && ! defined $valid{$1})
	{
	    &am_error ("invalid variable \"$varname\"");
	}
    }

    return (@result);
}


################################################################

# Verify that the file must exist in the current directory.
# Usage: require_file (strictness, file)
# strictness is the strictness level at which this file becomes
# required.
sub require_file
{
    local ($mystrict, $file) = @_;
    local ($fullfile) = $relative_dir . "/" . $file;

    if (-f $fullfile)
    {
	&push_dist_common ($file);
    }
    elsif ($install_missing && -f ($am_dir . '/' . $file))
    {
	# Install the missing file.  Symlink if we can, copy if we must.
	if ($symlink_exists)
	{
	    symlink ($am_dir . '/' . $file, $fullfile);
	}
	else
	{
	    system ('cp', $am_dir . '/' . $file, $fullfile);
	}
	&am_error ("required file \"$fullfile\" not found; installing");
    }
    elsif ($strictness >= $mystrict)
    {
	# Only an error if strictness constraint violated.
	&am_error ("required file \"$fullfile\" not found");
    }
}

# Push a list of files onto dist_common.
sub push_dist_common
{
    local (@files) = @_;
    local ($file);

    foreach $file (@files)
    {
	$dist_common{$file} = 1;
    }
}

# Push a list of clean targets onto phony.
sub push_phony_cleaners
{
    local ($base) = @_;
    local ($target);
    foreach $target ('mostly', 'dist', '', 'maintainer-')
    {
	push (@phony, $target . 'clean-' . $base);
    }
}

# Set strictness.
sub set_strictness
{
    local ($name) = @_;

    if ($name eq 'gnu')
    {
	$strictness = $GNU;
    }
    elsif ($name eq 'gnits')
    {
	$strictness = $GNITS;
    }
    elsif ($name eq 'normal')
    {
	$strictness = $NORMAL;
    }
    else
    {
	die "automake: level \`$name' not recognized\n";
    }
}


################################################################

# Return directory name of file.
sub dirname
{
    local ($file) = @_;
    local ($sub);

    ($sub = $file) =~ s,/+[^/]+,,g;
    $sub = '.' if $sub eq $file;
    return $sub;
}

# Make a directory.
sub mkdir
{
    local ($dirname) = @_;
    system ("mkdir", $dirname);
}

################################################################

# Print an error message and set exit status.
sub am_error
{
    warn "automake: ${am_file}.am: ", join (' ', @_), "\n";
    $exit_status = 1;
}

# Print usage information.
sub usage
{
    print "Usage: automake [OPTION] ... [Makefile]...\n";
    print $USAGE;
    print "\nFiles which are automatically distributed, if found:\n";
    $~ = "USAGE_FORMAT";
    local (@lcomm) = sort ((@common_files, @common_sometimes));
    local ($one, $two);
    while ($#lcomm >= 0)
    {
	$one = shift (@lcomm);
	$two = shift (@lcomm);
	write;
    }

    exit 0;
}

format USAGE_FORMAT =
  @<<<<<<<<<<<<<<<<    @<<<<<<<<<<<<<<<<
  $one,                $two
.