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#!/usr/bin/perl
# Copyright (C) 2006 Trent Piepho <xyzzy@speakeasy.org>
#
# Look for lines in C files like "#ifdef CONFIG_SOME_KCONF_VAR" and make
# sure CONFIG_SOME_KCONF_VAR is something that exists.
use strict;
if($#ARGV < 0) {
print "Usage: $0 kernel_dir [files to check ...]\n\n";
print "If no files are listed, checks all files from hg manifest\n";
exit;
}
my $kdir = shift;
if($#ARGV < 0) {
@ARGV = `hg manifest | cut "-d " -f3 | grep \\.[ch]\$`;
$? != 0 and die "Error getting manifest: $!";
chomp @ARGV;
}
my %kconfigs; # List of Kconfig files read in already
my %vars; # List of defined variables
sub readkconfig($$)
{
my $fn = "$_[0]/$_[1]";
# Don't read the same kconfig file more than once. This also means
# the drivers/media/Kconfig file from kernel won't be read in addition
# to the one from v4l-dvb.
return if exists $kconfigs{$_[1]};
$kconfigs{$_[1]} = 1;
# print "Reading $fn\n";
my $fh;
open $fh, '<', "$fn" or die "Can't read Kconfig file $fn: $!";
while(<$fh>) {
if (/^\s*source\s+"([^"]+)"\s*$/ || /^\s*source\s+(\S+)\s*$/) {
readkconfig($_[0], $1);
} elsif(/^(?:menu)?config\s+(\w+)$/) {
$vars{"CONFIG_$1"}=1;
}
}
close $fh;
}
readkconfig('linux', 'drivers/media/Kconfig');
foreach(glob "$kdir/arch/*/Kconfig") {
s|^\Q$kdir/\E||;
next if(m|arch/um/Kconfig|);
readkconfig($kdir, $_);
}
while(<>) {
if(/^\s*#ifn?def\s+(CONFIG_\w+?)(:?_MODULE)?\W*$/) {
# print "Found $1\n";
print "Unknown config $1 in $ARGV:$.\n" unless(exists $vars{$1});
next;
}
if(/^\s*#if/) {
$_ .= <> while(/\\$/); # Handle line continuations
my $last;
while(/defined\(\s*(CONFIG_\w+?)(_MODULE)?\s*\)/) {
$_ = $';
next if($last eq $1);
$last = $1;
print "Unknown config $1 in $ARGV:$.\n" unless(exists $vars{$1});
}
}
} continue {
close ARGV if eof;
}
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