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#!/usr/bin/perl
use FileHandle;
my %depend = ();
my %minver = ();
my %config = ();
my $version, $level, $sublevel;
sub add_config($)
{
my $arg=shift;
if ($arg =~ m/^([A-Z0-9_]+)/) {
$config{$1} = 1;
}
}
sub check_deps($)
{
my $arg=shift;
$arg=$arg." ";
while ($arg ne "") {
if ($arg =~ m/^([A-Z0-9_]+) /) {
my $val=$1;
my $prev=$depend{$val};
$depend { $val } = 1+$prev;
}
$arg =~ s/^[^ ]+ //;
}
}
sub open_kconfig($$) {
my ($dir,$file)=@_;
my $in = new FileHandle;
my $skip=0;
#print "opening $file\n";
open $in,"$file";
while (<$in>) {
# if (m;^\s*source[\s\"]+drivers/media/(video|dvb)/Kconfig;) {
# next;
# }
if (m|^\s*source[\s\"]+([^\n\s\"]+)[\n\s\"]|) {
open_kconfig($dir,"$dir/$1");
next;
}
if (m|^\s+depends on (.*)\n|) {
check_deps ($1);
}
if (m|^\s+select (.*)\n|) {
check_deps ($1);
}
if (m|^\s*config (.*)\n|) {
my $key=$1;
add_config ($1);
my $min=$minver { $key };
my $minversion, $minlevel, $minsublevel;
if ($min =~ m/(\d+)\.(\d+)\.(\d+)/) {
$minversion=$1;
$minlevel=$2;
$minsublevel=$3;
} else {
die "Minimum version for $key not found at versions.txt";
}
if ( ($version < $minversion) |
($level < $minlevel) |
($sublevel < $minsublevel) ) {
$skip=1;
printf "$key requires version $minversion.$minlevel.$minsublevel\n";
print OUT "# $key disabled due to incorrect version\nconfig $key\n\ttristate\n\tdefault n\n\n";
next;
} else {
# printf "OK: $key requires version $minversion.$minlevel.$minsublevel\n";
$skip=0;
}
}
s/^main(menu\s\"[^\"]+)/\1 - DON'T CHANGE IT!/;
if (m/^[\w]/) {
$skip=0;
}
if (!$skip) {
print OUT $_;
}
}
close $in;
}
sub parse_versions ()
{
my $in = new FileHandle;
my $ver;
open $in,"versions.txt";
while (<$in>) {
if (m/\[([\d.]*)\]/) {
$ver=$1;
next;
}
s/\n//;
if (m/^\s*([\w\d_]+)/) {
$minver { $1 } = $ver;
# printf ("%s=%s\n",$1,$ver);
}
}
close $in;
}
parse_versions;
open IN,".version";
while (<IN>) {
if (m/KERNELRELEASE\s*[:]*[=]+\s*(\d+)\.(\d+)\.(\d+)/) {
$version=$1;
$level=$2;
$sublevel=$3;
}
}
close IN;
printf "Preparing to compile for kernel version %d.%d.%d\n",$version,$level,$sublevel;
open OUT,">Kconfig";
print OUT "mainmenu \"V4L/DVB menu\"\n";
print OUT "source Kconfig.kern\n";
open_kconfig ("../linux","../linux/drivers/media/Kconfig");
close OUT;
while ( my ($key, $value) = each(%config) ) {
delete $depend{$key};
}
open OUT,">Kconfig.kern";
print OUT "config MODULES\n\tboolean\n\tdefault y\n\n";
while ( my ($key, $value) = each(%depend) ) {
print OUT "# $key with $value refs\nconfig $key\n\ttristate\n\tdefault m\n\n";
}
close OUT;
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