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#!/usr/bin/perl
use strict;
my $kdir=shift or die "should specify a kernel dir";
my $infile=shift or die "should specify an input config file";
my $outfile=shift or die "should specify an output config file";
my $out;
sub check_spin_lock()
{
my $file = "$kdir/include/linux/netdevice.h";
my $old_syntax = 1;
open INNET, "<$file" or die "File not found: $file";
while (<INNET>) {
if (m/netif_tx_lock_bh/) {
$old_syntax = 0;
last;
}
}
if ($old_syntax) {
$out.= "\n#define OLD_XMIT_LOCK 1\n";
}
close INNET;
}
sub check_snd_pcm_rate_to_rate_bit()
{
my $file = "$kdir/include/sound/pcm.h";
my $old_syntax = 1;
open INNET, "<$file" or die "File not found: $file";
while (<INNET>) {
if (m/snd_pcm_rate_to_rate_bit/) {
$old_syntax = 0;
last;
}
}
if ($old_syntax) {
$out.= "\n#define COMPAT_PCM_TO_RATE_BIT 1\n";
}
close INNET;
}
sub check_snd_ctl_boolean_mono_info()
{
my $file = "$kdir/include/sound/control.h";
my $old_syntax = 1;
open INNET, "<$file" or die "File not found: $file";
while (<INNET>) {
if (m/snd_ctl_boolean_mono_info/) {
$old_syntax = 0;
last;
}
}
if ($old_syntax) {
$out.= "\n#define COMPAT_SND_CTL_BOOLEAN_MONO 1\n";
}
close INNET;
}
sub check_other_dependencies()
{
check_spin_lock();
check_snd_ctl_boolean_mono_info();
check_snd_pcm_rate_to_rate_bit();
}
# Do the basic rules
open IN, "<$infile" or die "File not found: $infile";
$out.= "#ifndef __CONFIG_COMPAT_H__\n";
$out.= "#define __CONFIG_COMPAT_H__\n\n";
$out.= "#include <linux/autoconf.h>\n\n";
while(<IN>) {
next unless /^(\S+)\s*:= (\S+)$/;
$out.= "#undef $1\n";
$out.= "#undef $1_MODULE\n";
if($2 eq "n") {
next;
} elsif($2 eq "m") {
$out.= "#define $1_MODULE 1\n";
} elsif($2 eq "y") {
$out.= "#define $1 1\n";
} else {
$out.= "#define $1 $2\n";
}
}
close IN;
check_other_dependencies();
open OUT, ">$outfile" or die 'Unable to write $outfile';
print OUT "$out\n#endif\n";
close OUT
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