1 files changed, 60 insertions, 0 deletions
diff --git a/v4l/scripts/make_config_compat.pl b/v4l/scripts/make_config_compat.pl
new file mode 100644
index 000000000..be577d247
--- /dev/null
+++ b/v4l/scripts/make_config_compat.pl
@@ -0,0 +1,60 @@
+#!/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) {
+		$out.= "\n#define OLD_XMIT_LOCK 1\n";
+	}
+	close INNET;
+}
+
+sub check_other_dependencies()
+{
+	check_spin_lock();
+}
+
+# Do the basic rules
+open IN, "<$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