#! /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); }