1 files changed, 140 insertions, 0 deletions
diff --git a/build-aux/build_info.pl b/build-aux/build_info.pl
new file mode 100755
index 0000000..6c63b36
--- /dev/null
+++ b/build-aux/build_info.pl
@@ -0,0 +1,140 @@
+#!/usr/bin/env perl
+
+# Generate build_info.c.
+
+# Copyright (C) 2009-2011, 2018-2020 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 Carp qw(croak);
+
+my $file = shift @ARGV;
+
+{
+    my $data = parse_config();
+    output_code($data);
+}
+
+sub parse_config
+{
+    my $features = [];
+    my $choice_key;
+    my $choice = [];
+    my $list = $features;
+
+    open(my $fh, '<', "$file.in") or die "Cannot open $file.in: $!";
+
+    while (<$fh>) {
+        next if /^\s*$/;
+
+        if ($list eq $choice) {
+            unless (s/^\s+//) {
+                $list = $features;
+                push @$features, [$choice_key, $choice];
+                $choice = [];
+                undef $choice_key;
+            }
+        } elsif (/^([A-Za-z0-9_-]+) \s+ choice:\s*$/x) {
+            $choice_key = $1;
+            $list = $choice;
+            next;
+        }
+
+        if (/^([A-Za-z0-9_-]+) \s+ (.*)$/x) {
+            push @$list, [$1, $2];
+        } else {
+            croak "Can't parse line: $_";
+        }
+    }
+
+    if ($list eq $choice) {
+        push @$features, [$choice_key, $choice];
+    }
+
+    close($fh);
+
+    return $features;
+}
+
+sub output_code
+{
+    my $features = shift;
+
+    open(my $fh, '>', "$file") or die "Cannot open $file: $!";
+
+    print $fh do { local $/; <DATA> }, "\n";
+    print $fh <<EOC;
+const char *compiled_features[] =
+{
+
+EOC
+    foreach my $feature (sort { $a->[0] cmp $b->[0] } @$features) {
+        my ($name, $check) = @$feature;
+
+        if (ref $check eq 'ARRAY') {
+            my ($ch_name, $ch_check) = @{ shift @$check };
+            print $fh <<EOC;
+#if $ch_check
+  "+$name/$ch_name",
+EOC
+            foreach my $choice (@$check) {
+                ($ch_name, $ch_check) = @$choice;
+
+                print $fh <<EOC;
+#elif $ch_check
+  "+$name/$ch_name",
+EOC
+            }
+                print $fh <<EOC;
+#else
+  "-$name",
+#endif
+
+EOC
+        } else {
+            print $fh <<EOC;
+#if $check
+  "+$name",
+#else
+  "-$name",
+#endif
+
+EOC
+        }
+    }
+    print $fh <<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>
+#include "version.h"