--- /dev/null
+#!/usr/bin/perl
+
+# Generate build_info.c.
+
+# Copyright (C) 2009 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+
+use FindBin qw($Bin);
+use File::Spec ();
+
+my $file = File::Spec->catfile($Bin, 'src', 'build_info.c.in');
+
+{
+ my $data = parse_config();
+ output_code($data);
+}
+
+sub parse_config
+{
+ my (%block, @defines, %feature);
+
+ open(my $fh, '<', $file) or die "Cannot open $file: $!";
+ my $cfg = do { local $/; <$fh> };
+ close($fh);
+
+ while ($cfg =~ /^\ *? (\w+) (?:\s+?)? (\w+?)? \s*$/gmx) {
+ $feature{$1} = $2 || '_MISSING';
+ push @defines, $1;
+ }
+ while ($cfg =~ /^(\ *? \#\w+? \s+? (\w+) .+ \#\w+)/gmsx) {
+ $block{$2} = $1;
+ }
+
+ my %data = (
+ block => \%block,
+ defines => \@defines,
+ feature => \%feature,
+ );
+
+ return \%data;
+}
+
+sub output_code
+{
+ my ($block, $defines, $feature) =
+ map $_[0]->{$_}, qw(block defines feature);
+
+ print do { local $/; <DATA> }, "\n";
+ print <<EOC;
+const char* (compiled_features[]) =
+{
+
+EOC
+ my @output;
+ foreach my $define (@$defines) {
+ if (!exists $block->{$define}) {
+ push @output, <<EOC;
+#ifdef $define
+ "+$feature->{$define}",
+#else
+ "-$feature->{$define}",
+#endif
+EOC
+ }
+ else {
+ push @output, <<EOC;
+$block->{$define}
+EOC
+ }
+ }
+ print join "\n", @output;
+ print <<EOC;
+
+ /* sentinel value */
+ NULL
+};
+
+
+EOC
+}
+
+__DATA__
+/* Autogenerated by build_info.pl - DO NOT EDIT */
+
+/* This stores global variables that are initialized with
+ preprocessor declarations for output with the --version flag.
+
+ Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. */
+
+#include "wget.h"
+#include <stdio.h>