Linus TorvaldsLinux-2.6.12-rc21da177e21 years agoHistory
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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))); 	# 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;	} 	# 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);}