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#! /usr/bin/perl
#
# checkconfig: find uses of CONFIG_* names without matching definitions.
# Copyright abandoned, 1998, Michael Elizabeth Chastain <mailto:mec@shout.net>.
use integer;
$| = 1;
foreach $file (@ARGV)
{
# Open this file.
open(FILE, $file) || die "Can't open $file: $!\n";
# Initialize variables.
my $fInComment = 0;
my $fInString = 0;
my $fUseConfig = 0;
my $iLinuxConfig = 0;
my %configList = ();
LINE: while ( <FILE> )
{
# Strip comments.
$fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));
# Strip strings.
$fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));
# Pick up definitions.
if ( m/^\s*#/o )
{
$iLinuxConfig = $. if m/^\s*#\s*include\s*<linux\/config\.h>/o;
$configList{uc $1} = 1 if m/^\s*#\s*include\s*<config\/(\S*)\.h>/o;
$configList{$1} = 1 if m/^\s*#\s*define\s+CONFIG_(\w*)/o;
$configList{$1} = 1 if m/^\s*#\s*undef\s+CONFIG_(\w*)/o;
}
# Look for usages.
next unless m/CONFIG_/o;
WORD: while ( m/\bCONFIG_(\w+)/og )
{
$fUseConfig = 1;
last LINE if $iLinuxConfig;
next WORD if exists $configList{$1};
print "$file: $.: need CONFIG_$1.\n";
$configList{$1} = 0;
}
}
# Report superfluous includes.
if ( $iLinuxConfig && ! $fUseConfig )
{ print "$file: $iLinuxConfig: <linux/config.h> not needed.\n"; }
close(FILE);
}
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