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|
#!@PERL@ -w
# -*- perl -*-
# @configure_input@
eval 'case $# in 0) exec @PERL@ -S "$0";; *) exec @PERL@ -S "$0" "$@";; esac'
if 0;
# aclocal - create aclocal.m4 by scanning configure.ac
# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
# 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
# Written by Tom Tromey <tromey@redhat.com>, and
# Alexandre Duret-Lutz <adl@gnu.org>.
BEGIN
{
my $perllibdir = $ENV{'perllibdir'} || '@datadir@/@PACKAGE@-@APIVERSION@';
unshift @INC, (split '@PATH_SEPARATOR@', $perllibdir);
}
use strict;
use Automake::Config;
use Automake::General;
use Automake::Configure_ac;
use Automake::Channels;
use Automake::ChannelDefs;
use Automake::XFile;
use Automake::FileUtils;
use File::Basename;
use File::stat;
use Cwd;
# Some globals.
# Include paths for searching macros. We search macros in this order:
# user-supplied directories first, then the directory containing the
# automake macros, and finally the system-wide directories for
# third-party macro. @user_includes can be augmented with -I.
# @system_includes can be augmented with the `dirlist' file. Also
# --acdir will reset both @automake_includes and @system_includes.
my @user_includes = ();
my @automake_includes = ("@datadir@/aclocal-$APIVERSION");
my @system_includes = ('@datadir@/aclocal');
# Whether we should copy M4 file in $user_includes[0].
my $install = 0;
# --diff
my @diff_command;
# --dry-run
my $dry_run = 0;
# configure.ac or configure.in.
my $configure_ac;
# Output file name.
my $output_file = 'aclocal.m4';
# Option --force.
my $force_output = 0;
# Modification time of the youngest dependency.
my $greatest_mtime = 0;
# Which macros have been seen.
my %macro_seen = ();
# Remember the order into which we scanned the files.
# It's important to output the contents of aclocal.m4 in the opposite order.
# (Definitions in first files we have scanned should override those from
# later files. So they must appear last in the output.)
my @file_order = ();
# Map macro names to file names.
my %map = ();
# Ditto, but records the last definition of each macro as returned by --trace.
my %map_traced_defs = ();
# Map basenames to macro names.
my %invmap = ();
# Map file names to file contents.
my %file_contents = ();
# Map file names to file types.
my %file_type = ();
use constant FT_USER => 1;
use constant FT_AUTOMAKE => 2;
use constant FT_SYSTEM => 3;
# Map file names to included files (transitively closed).
my %file_includes = ();
# Files which have already been added.
my %file_added = ();
# Files that have already been scanned.
my %scanned_configure_dep = ();
# Serial numbers, for files that have one.
# The key is the basename of the file,
# the value is the serial number represented as a list.
my %serial = ();
# Matches a macro definition.
# AC_DEFUN([macroname], ...)
# or
# AC_DEFUN(macroname, ...)
# When macroname is `['-quoted , we accept any character in the name,
# except `]'. Otherwise macroname stops on the first `]', `,', `)',
# or `\n' encountered.
my $ac_defun_rx =
"(?:AU_ALIAS|A[CU]_DEFUN|AC_DEFUN_ONCE)\\((?:\\[([^]]+)\\]|([^],)\n]+))";
# Matches an AC_REQUIRE line.
my $ac_require_rx = "AC_REQUIRE\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
# Matches an m4_include line
my $m4_include_rx = "(?:m4_)?(s?)include\\((?:\\[([^]]+)\\]|([^],)\n]+))\\)";
# Match a serial number
my $serial_line_rx = '^#\s*serial\s+(\S*)';
my $serial_number_rx = '^\d+(?:\.\d+)*$';
################################################################
# Check macros in acinclude.m4. If one is not used, warn.
sub check_acinclude ()
{
foreach my $key (keys %map)
{
# FIXME: should print line number of acinclude.m4.
msg ('syntax', "warning: macro `$key' defined in "
. "acinclude.m4 but never used")
if $map{$key} eq 'acinclude.m4' && ! exists $macro_seen{$key};
}
}
sub reset_maps ()
{
$greatest_mtime = 0;
%macro_seen = ();
@file_order = ();
%map = ();
%map_traced_defs = ();
%file_contents = ();
%file_type = ();
%file_includes = ();
%file_added = ();
%scanned_configure_dep = ();
%invmap = ();
%serial = ();
undef &search;
}
# install_file ($SRC, $DEST)
sub install_file ($$)
{
my ($src, $dest) = @_;
my $diff_dest = $dest;
if ($force_output
|| !exists $file_contents{$dest}
|| $file_contents{$src} ne $file_contents{$dest})
{
if (-e $dest)
{
msg 'note', "overwriting `$dest' with `$src'";
}
else
{
msg 'note', "installing `$dest' from `$src'";
$diff_dest = '/dev/null';
}
if (@diff_command)
{
my @cmd = (@diff_command, $diff_dest, $src);
$! = 0;
verb "running: @cmd";
my $res = system (@cmd);
Automake::FileUtils::handle_exec_errors "@cmd", 1
if $res;
}
elsif (!$dry_run)
{
xsystem ('cp', $src, $dest);
}
}
}
# Compare two lists of numbers.
sub list_compare (\@\@)
{
my @l = @{$_[0]};
my @r = @{$_[1]};
while (1)
{
if (0 == @l)
{
return (0 == @r) ? 0 : -1;
}
elsif (0 == @r)
{
return 1;
}
elsif ($l[0] < $r[0])
{
return -1;
}
elsif ($l[0] > $r[0])
{
return 1;
}
shift @l;
shift @r;
}
}
################################################################
# scan_m4_dirs($TYPE, @DIRS)
# --------------------------
# Scan all M4 files installed in @DIRS for new macro definitions.
# Register each file as of type $TYPE (one of the FT_* constants).
sub scan_m4_dirs ($@)
{
my ($type, @dirlist) = @_;
foreach my $m4dir (@dirlist)
{
if (! opendir (DIR, $m4dir))
{
fatal "couldn't open directory `$m4dir': $!";
}
# We reverse the directory contents so that foo2.m4 gets
# used in preference to foo1.m4.
foreach my $file (reverse sort grep (! /^\./, readdir (DIR)))
{
# Only examine .m4 files.
next unless $file =~ /\.m4$/;
# Skip some files when running out of srcdir.
next if $file eq 'aclocal.m4';
my $fullfile = File::Spec->canonpath ("$m4dir/$file");
&scan_file ($type, $fullfile, 'aclocal');
}
closedir (DIR);
}
}
# Scan all the installed m4 files and construct a map.
sub scan_m4_files ()
{
# First, scan configure.ac. It may contain macro definitions,
# or may include other files that define macros.
&scan_file (FT_USER, $configure_ac, 'aclocal');
# Then, scan acinclude.m4 if it exists.
if (-f 'acinclude.m4')
{
&scan_file (FT_USER, 'acinclude.m4', 'aclocal');
}
# Finally, scan all files in our search paths.
scan_m4_dirs (FT_USER, @user_includes);
scan_m4_dirs (FT_AUTOMAKE, @automake_includes);
scan_m4_dirs (FT_SYSTEM, @system_includes);
# Construct a new function that does the searching. We use a
# function (instead of just evaluating $search in the loop) so that
# "die" is correctly and easily propagated if run.
my $search = "sub search {\nmy \$found = 0;\n";
foreach my $key (reverse sort keys %map)
{
$search .= ('if (/\b\Q' . $key . '\E(?!\w)/) { & add_macro ("' . $key
. '"); $found = 1; }' . "\n");
}
$search .= "return \$found;\n};\n";
eval $search;
prog_error "$@\n search is $search" if $@;
}
################################################################
# Add a macro to the output.
sub add_macro ($)
{
my ($macro) = @_;
# Ignore unknown required macros. Either they are not really
# needed (e.g., a conditional AC_REQUIRE), in which case aclocal
# should be quiet, or they are needed and Autoconf itself will
# complain when we trace for macro usage later.
return unless defined $map{$macro};
verb "saw macro $macro";
$macro_seen{$macro} = 1;
&add_file ($map{$macro});
}
# scan_configure_dep ($file)
# --------------------------
# Scan a configure dependency (configure.ac, or separate m4 files)
# for uses of know macros and AC_REQUIREs of possibly unknown macros.
# Recursively scan m4_included files.
sub scan_configure_dep ($)
{
my ($file) = @_;
# Do not scan a file twice.
return ()
if exists $scanned_configure_dep{$file};
$scanned_configure_dep{$file} = 1;
my $mtime = mtime $file;
$greatest_mtime = $mtime if $greatest_mtime < $mtime;
my $contents = exists $file_contents{$file} ?
$file_contents{$file} : contents $file;
my $line = 0;
my @rlist = ();
my @ilist = ();
foreach (split ("\n", $contents))
{
++$line;
# Remove comments from current line.
s/\bdnl\b.*$//;
s/\#.*$//;
while (/$m4_include_rx/go)
{
my $ifile = $2 || $3;
# Skip missing `sinclude'd files.
next if $1 eq 's' && ! -f $ifile;
push @ilist, $ifile;
}
while (/$ac_require_rx/go)
{
push (@rlist, $1 || $2);
}
# The search function is constructed dynamically by
# scan_m4_files. The last parenthetical match makes sure we
# don't match things that look like macro assignments or
# AC_SUBSTs.
if (! &search && /(^|\s+)(AM_[A-Z0-9_]+)($|[^\]\)=A-Z0-9_])/)
{
# Macro not found, but AM_ prefix found.
# Make this just a warning, because we do not know whether
# the macro is actually used (it could be called conditionally).
msg ('unsupported', "$file:$line",
"warning: macro `$2' not found in library");
}
}
add_macro ($_) foreach (@rlist);
&scan_configure_dep ($_) foreach @ilist;
}
# add_file ($FILE)
# ----------------
# Add $FILE to output.
sub add_file ($)
{
my ($file) = @_;
# Only add a file once.
return if ($file_added{$file});
$file_added{$file} = 1;
scan_configure_dep $file;
}
# Point to the documentation for underquoted AC_DEFUN only once.
my $underquoted_manual_once = 0;
# scan_file ($TYPE, $FILE, $WHERE)
# --------------------------------
# Scan a single M4 file ($FILE), and all files it includes.
# Return the list of included files.
# $TYPE is one of FT_USER, FT_AUTOMAKE, or FT_SYSTEM, depending
# on where the file comes from.
# $WHERE is the location to use in the diagnostic if the file
# does not exist.
sub scan_file ($$$)
{
my ($type, $file, $where) = @_;
my $basename = basename $file;
# Do not scan the same file twice.
return @{$file_includes{$file}} if exists $file_includes{$file};
# Prevent potential infinite recursion (if two files include each other).
return () if exists $file_contents{$file};
unshift @file_order, $file;
$file_type{$file} = $type;
fatal "$where: file `$file' does not exist" if ! -e $file;
my $fh = new Automake::XFile $file;
my $contents = '';
my @inc_files = ();
my %inc_lines = ();
my $defun_seen = 0;
my $serial_seen = 0;
my $serial_older = 0;
while ($_ = $fh->getline)
{
# Ignore `##' lines.
next if /^##/;
$contents .= $_;
my $line = $_;
if ($line =~ /$serial_line_rx/go)
{
my $number = $1;
if ($number !~ /$serial_number_rx/go)
{
msg ('syntax', "$file:$.",
"warning: ill-formed serial number `$number', "
. "expecting a version string with only digits and dots");
}
elsif ($defun_seen)
{
# aclocal removes all definitions from M4 file with the
# same basename if a greater serial number is found.
# Encountering a serial after some macros will undefine
# these macros...
msg ('syntax', "$file:$.",
'the serial number must appear before any macro definition');
}
# We really care about serials only for non-automake macros
# and when --install is used. But the above diagnostics are
# made regardless of this, because not using --install is
# not a reason not the fix macro files.
elsif ($install && $type != FT_AUTOMAKE)
{
$serial_seen = 1;
my @new = split (/\./, $number);
verb "$file:$.: serial $number";
if (!exists $serial{$basename}
|| list_compare (@new, @{$serial{$basename}}) > 0)
{
# Delete any definition we knew from the old macro.
foreach my $def (@{$invmap{$basename}})
{
verb "$file:$.: ignoring previous definition of $def";
delete $map{$def};
}
$invmap{$basename} = [];
$serial{$basename} = \@new;
}
else
{
$serial_older = 1;
}
}
}
while ($line =~ /$ac_defun_rx/go)
{
$defun_seen = 1;
if (! defined $1)
{
msg ('syntax', "$file:$.", "warning: underquoted definition of $2"
. "\n run info '(automake)Extending aclocal'\n"
. " or see http://sources.redhat.com/automake/"
. "automake.html#Extending-aclocal")
unless $underquoted_manual_once;
$underquoted_manual_once = 1;
}
# If this macro does not have a serial and we have already
# seen a macro with the same basename earlier, we should
# ignore the macro (don't exit immediately so we can still
# diagnose later #serial numbers and underquoted macros).
$serial_older ||= ($type != FT_AUTOMAKE
&& !$serial_seen && exists $serial{$basename});
my $macro = $1 || $2;
if (!$serial_older && !defined $map{$macro})
{
verb "found macro $macro in $file: $.";
$map{$macro} = $file;
push @{$invmap{$basename}}, $macro;
}
else
{
# Note: we used to give an error here if we saw a
# duplicated macro. However, this turns out to be
# extremely unpopular. It causes actual problems which
# are hard to work around, especially when you must
# mix-and-match tool versions.
verb "ignoring macro $macro in $file: $.";
}
}
while ($line =~ /$m4_include_rx/go)
{
my $ifile = $2 || $3;
# Skip missing `sinclude'd files.
next if $1 eq 's' && ! -f $ifile;
push (@inc_files, $ifile);
$inc_lines{$ifile} = $.;
}
}
# Ignore any file that has an old serial (or no serial if we know
# another one with a serial).
return ()
if ($serial_older ||
($type != FT_AUTOMAKE && !$serial_seen && exists $serial{$basename}));
$file_contents{$file} = $contents;
# For some reason I don't understand, it does not work
# to do `map { scan_file ($_, ...) } @inc_files' below.
# With Perl 5.8.2 it undefines @inc_files.
my @copy = @inc_files;
my @all_inc_files = (@inc_files,
map { scan_file ($type, $_,
"$file:$inc_lines{$_}") } @copy);
$file_includes{$file} = \@all_inc_files;
return @all_inc_files;
}
# strip_redundant_includes (%FILES)
# ---------------------------------
# Each key in %FILES is a file that must be present in the output.
# However some of these files might already include other files in %FILES,
# so there is no point in including them another time.
# This removes items of %FILES which are already included by another file.
sub strip_redundant_includes (%)
{
my %files = @_;
# Always include acinclude.m4, even if it does not appear to be used.
$files{'acinclude.m4'} = 1 if -f 'acinclude.m4';
# File included by $configure_ac are redundant.
$files{$configure_ac} = 1;
# Files at the end of @file_order should override those at the beginning,
# so it is important to preserve these trailing files. We can remove
# a file A if it is going to be output before a file B that includes
# file A, not the converse.
foreach my $file (reverse @file_order)
{
next unless exists $files{$file};
foreach my $ifile (@{$file_includes{$file}})
{
next unless exists $files{$ifile};
delete $files{$ifile};
verb "$ifile is already included by $file";
}
}
# configure.ac is implicitly included.
delete $files{$configure_ac};
return %files;
}
sub trace_used_macros ()
{
my %files = map { $map{$_} => 1 } keys %macro_seen;
%files = strip_redundant_includes %files;
my $traces = ($ENV{AUTOM4TE} || 'autom4te');
$traces .= " --language Autoconf-without-aclocal-m4 ";
# All candidate files.
$traces .= join (' ', grep { exists $files{$_} } @file_order) . " ";
# All candidate macros.
$traces .= join (' ',
(map { "--trace='$_:\$f::\$n::\$1'" } ('AC_DEFUN',
'AC_DEFUN_ONCE',
'AU_DEFUN')),
# Do not trace $1 for all other macros as we do
# not need it and it might contains harmful
# characters (like newlines).
(map { "--trace='$_:\$f::\$n'" } (keys %macro_seen)));
verb "running $traces $configure_ac";
my $tracefh = new Automake::XFile ("$traces $configure_ac |");
my %traced = ();
while ($_ = $tracefh->getline)
{
chomp;
my ($file, $macro, $arg1) = split (/::/);
$traced{$macro} = 1 if exists $macro_seen{$macro};
$map_traced_defs{$arg1} = $file
if ($macro eq 'AC_DEFUN'
|| $macro eq 'AC_DEFUN_ONCE'
|| $macro eq 'AU_DEFUN');
}
$tracefh->close;
return %traced;
}
sub scan_configure ()
{
# Make sure we include acinclude.m4 if it exists.
if (-f 'acinclude.m4')
{
add_file ('acinclude.m4');
}
scan_configure_dep ($configure_ac);
}
################################################################
# Write output.
# Return 0 iff some files were installed locally.
sub write_aclocal ($@)
{
my ($output_file, @macros) = @_;
my $output = '';
my %files = ();
# Get the list of files containing definitions for the macros used.
# (Filter out unused macro definitions with $map_traced_defs. This
# can happen when an Autoconf macro is conditionally defined:
# aclocal sees the potential definition, but this definition is
# actually never processed and the Autoconf implementation is used
# instead.)
for my $m (@macros)
{
$files{$map{$m}} = 1
if (exists $map_traced_defs{$m}
&& $map{$m} eq $map_traced_defs{$m});
}
# Do not explicitly include a file that is already indirectly included.
%files = strip_redundant_includes %files;
my $installed = 0;
for my $file (grep { exists $files{$_} } @file_order)
{
# Check the time stamp of this file, and of all files it includes.
for my $ifile ($file, @{$file_includes{$file}})
{
my $mtime = mtime $ifile;
$greatest_mtime = $mtime if $greatest_mtime < $mtime;
}
# If the file to add looks like outside the project, copy it
# to the output. The regex catches filenames starting with
# things like `/', `\', or `c:\'.
if ($file_type{$file} != FT_USER
|| $file =~ m,^(?:\w:)?[\\/],)
{
if (!$install || $file_type{$file} != FT_SYSTEM)
{
# Copy the file into aclocal.m4.
$output .= $file_contents{$file} . "\n";
}
else
{
# Install the file (and any file it includes).
my $dest;
for my $ifile (@{$file_includes{$file}}, $file)
{
$dest = "$user_includes[0]/" . basename $ifile;
verb "installing $ifile to $dest";
install_file ($ifile, $dest);
}
$installed = 1;
}
}
else
{
# Otherwise, simply include the file.
$output .= "m4_include([$file])\n";
}
}
if ($installed)
{
verb "running aclocal anew, because some files were installed locally";
return 0;
}
# Nothing to output?!
# FIXME: Shouldn't we diagnose this?
return 1 if ! length ($output);
# We used to print `# $output_file generated automatically etc.' But
# this creates spurious differences when using autoreconf. Autoreconf
# creates aclocal.m4t and then rename it to aclocal.m4, but the
# rebuild rules generated by Automake create aclocal.m4 directly --
# this would gives two ways to get the same file, with a different
# name in the header.
$output = "# generated automatically by aclocal $VERSION -*- Autoconf -*-
# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
# 2005 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.
$output";
# We try not to update $output_file unless necessary, because
# doing so invalidate Autom4te's cache and therefore slows down
# tools called after aclocal.
#
# We need to overwrite $output_file in the following situations.
# * The --force option is in use.
# * One of the dependencies is younger.
# (Not updating $output_file in this situation would cause
# make to call aclocal in loop.)
# * The contents of the current file are different from what
# we have computed.
if (!$force_output
&& $greatest_mtime < mtime ($output_file)
&& $output eq contents ($output_file))
{
verb "$output_file unchanged";
return 1;
}
verb "writing $output_file";
if (!$dry_run)
{
my $out = new Automake::XFile "> $output_file";
print $out $output;
}
return 1;
}
################################################################
# Print usage and exit.
sub usage ($)
{
my ($status) = @_;
print "Usage: aclocal [OPTIONS] ...
Generate `aclocal.m4' by scanning `configure.ac' or `configure.in'
Options:
--acdir=DIR directory holding config files (for debugging)
--diff[=COMMAND] run COMMAND [diff -u] on M4 files that would be
changed (implies --install and --dry-run)
--dry-run pretend to, but do not actually update any file
--force always update output file
--help print this help, then exit
-I DIR add directory to search list for .m4 files
--install copy third-party files to the first -I directory
--output=FILE put output in FILE (default aclocal.m4)
--print-ac-dir print name of directory holding m4 files, then exit
--verbose don't be silent
--version print version number, then exit
-W, --warnings=CATEGORY report the warnings falling in CATEGORY
Warning categories include:
`syntax' dubious syntactic constructs (default)
`unsupported' unknown macros (default)
`all' all the warnings (default)
`no-CATEGORY' turn off warnings in CATEGORY
`none' turn off all the warnings
`error' treat warnings as errors
Report bugs to <bug-automake\@gnu.org>.\n";
exit $status;
}
# Print version and exit.
sub version()
{
print <<EOF;
aclocal (GNU $PACKAGE) $VERSION
Written by Tom Tromey <tromey\@redhat.com>
and Alexandre Duret-Lutz <adl\@gnu.org>.
Copyright (C) 2005 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
EOF
exit 0;
}
# Parse command line.
sub parse_arguments ()
{
my $print_and_exit = 0;
my $diff_command;
my %cli_options =
(
'acdir=s' => sub # Setting --acdir overrides both the
{ # automake (versioned) directory and the
# public (unversioned) system directory.
@automake_includes = ();
@system_includes = ($_[1])
},
'diff:s' => \$diff_command,
'dry-run' => \$dry_run,
'force' => \$force_output,
'I=s' => \@user_includes,
'install' => \$install,
'output=s' => \$output_file,
'print-ac-dir' => \$print_and_exit,
'verbose' => sub { setup_channel 'verb', silent => 0; },
'W|warnings=s' => \&parse_warnings,
);
use Getopt::Long;
Getopt::Long::config ("bundling", "pass_through");
# See if --version or --help is used. We want to process these before
# anything else because the GNU Coding Standards require us to
# `exit 0' after processing these options, and we can't guarantee this
# if we treat other options first. (Handling other options first
# could produce error diagnostics, and in this condition it is
# confusing if aclocal does `exit 0'.)
my %cli_options_1st_pass =
(
'version' => \&version,
'help' => sub { usage(0); },
# Recognize all other options (and their arguments) but do nothing.
map { $_ => sub {} } (keys %cli_options)
);
my @ARGV_backup = @ARGV;
Getopt::Long::GetOptions %cli_options_1st_pass
or exit 1;
@ARGV = @ARGV_backup;
# Now *really* process the options. This time we know that --help
# and --version are not present, but we specify them nonetheless so
# that ambiguous abbreviation are diagnosed.
Getopt::Long::GetOptions %cli_options, 'version' => sub {}, 'help' => sub {}
or exit 1;
if (@ARGV)
{
my %argopts;
for my $k (keys %cli_options)
{
if ($k =~ /(.*)=s$/)
{
map { $argopts{(length ($_) == 1)
? "-$_" : "--$_" } = 1; } (split (/\|/, $1));
}
}
if (exists $argopts{$ARGV[0]})
{
fatal ("option `$ARGV[0]' requires an argument\n"
. "Try `$0 --help' for more information.");
}
else
{
fatal ("unrecognized option `$ARGV[0]'\n"
. "Try `$0 --help' for more information.");
}
}
if ($print_and_exit)
{
print "@system_includes\n";
exit 0;
}
if (defined $diff_command)
{
$diff_command = 'diff -u' if $diff_command eq '';
@diff_command = split (' ', $diff_command);
$install = 1;
$dry_run = 1;
}
if ($install && !@user_includes)
{
fatal ("--install should copy macros in the directory indicated by the"
. "\nfirst -I option, but no -I was supplied.");
}
if (! -d $system_includes[0])
{
# By default $(datadir)/aclocal doesn't exist. We don't want to
# get an error in the case where we are searching the default
# directory and it hasn't been created. (We know
# @system_includes has its default value if @automake_includes
# is not empty, because --acdir is the only way to change this.)
@system_includes = () if @automake_includes;
}
else
{
# Finally, adds any directory listed in the `dirlist' file.
if (open (DIRLIST, "$system_includes[0]/dirlist"))
{
while (<DIRLIST>)
{
# Ignore '#' lines.
next if /^#/;
# strip off newlines and end-of-line comments
s/\s*\#.*$//;
chomp;
push (@system_includes, $_) if -d $_;
}
close (DIRLIST);
}
}
}
################################################################
parse_WARNINGS; # Parse the WARNINGS environment variable.
parse_arguments;
$configure_ac = require_configure_ac;
# We may have to rerun aclocal if some file have been installed, but
# it should not happen more than once. The reason we must run again
# is that once the file has been moved from /usr/share/aclocal/ to the
# local m4/ directory it appears at a new place in the search path,
# hence it should be output at a different position in aclocal.m4. If
# we did not rerun aclocal, the next run of aclocal would produce a
# different aclocal.m4.
my $loop = 0;
while (1)
{
++$loop;
prog_error "Too many loops." if $loop > 2;
reset_maps;
scan_m4_files;
scan_configure;
last if $exit_code;
my %macro_traced = trace_used_macros;
last if write_aclocal ($output_file, keys %macro_traced);
last if $dry_run;
}
check_acinclude;
exit $exit_code;
### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End:
|