[PATCH] swsusp: let userland tools switch console on suspend
[linux-2.6/suspend2-2.6.18.git] / scripts / checkconfig.pl
blobca1f231b15a68419d0fe4775a6095c4765d6a01c
1 #! /usr/bin/perl
3 # checkconfig: find uses of CONFIG_* names without matching definitions.
4 # Copyright abandoned, 1998, Michael Elizabeth Chastain <mailto:mec@shout.net>.
6 use integer;
8 $| = 1;
10 foreach $file (@ARGV)
12 # Open this file.
13 open(FILE, $file) || die "Can't open $file: $!\n";
15 # Initialize variables.
16 my $fInComment = 0;
17 my $fInString = 0;
18 my $fUseConfig = 0;
19 my $iLinuxConfig = 0;
20 my %configList = ();
22 LINE: while ( <FILE> )
24 # Strip comments.
25 $fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
26 m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));
28 # Pick up definitions.
29 if ( m/^\s*#/o )
31 $iLinuxConfig = $. if m/^\s*#\s*include\s*"linux\/config\.h"/o;
32 $configList{uc $1} = 1 if m/^\s*#\s*include\s*"config\/(\S*)\.h"/o;
35 # Strip strings.
36 $fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
37 m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));
39 # Pick up definitions.
40 if ( m/^\s*#/o )
42 $iLinuxConfig = $. if m/^\s*#\s*include\s*<linux\/config\.h>/o;
43 $configList{uc $1} = 1 if m/^\s*#\s*include\s*<config\/(\S*)\.h>/o;
44 $configList{$1} = 1 if m/^\s*#\s*define\s+CONFIG_(\w*)/o;
45 $configList{$1} = 1 if m/^\s*#\s*undef\s+CONFIG_(\w*)/o;
48 # Look for usages.
49 next unless m/CONFIG_/o;
50 WORD: while ( m/\bCONFIG_(\w+)/og )
52 $fUseConfig = 1;
53 last LINE if $iLinuxConfig;
54 next WORD if exists $configList{$1};
55 print "$file: $.: need CONFIG_$1.\n";
56 $configList{$1} = 0;
60 # Report superfluous includes.
61 if ( $iLinuxConfig && ! $fUseConfig )
62 { print "$file: $iLinuxConfig: linux/config.h not needed.\n"; }
64 close(FILE);