Don't require Perl for user builds.

[wget] / build-aux / build_info.pl

diff --git a/build-aux/build_info.pl b/build-aux/build_info.pl
new file mode 100755 (executable)
index 0000000..a006b6d
--- /dev/null
+++ b/build-aux/build_info.pl
@@ -0,0 +1,107 @@
+#!/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 = shift @ARGV;
+
+{
+    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>