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Steven Rostedtdcc60242009-04-29 22:52:21 -04001#!/usr/bin/perl -w
2#
Uwe Kleine-Königcce1dac2011-01-24 21:12:01 +01003# Copyright 2005-2009 - Steven Rostedt
Steven Rostedtdcc60242009-04-29 22:52:21 -04004# Licensed under the terms of the GNU GPL License version 2
5#
6# It's simple enough to figure out how this works.
7# If not, then you can ask me at stripconfig@goodmis.org
8#
9# What it does?
10#
11# If you have installed a Linux kernel from a distribution
12# that turns on way too many modules than you need, and
13# you only want the modules you use, then this program
14# is perfect for you.
15#
16# It gives you the ability to turn off all the modules that are
17# not loaded on your system.
18#
19# Howto:
20#
21# 1. Boot up the kernel that you want to stream line the config on.
22# 2. Change directory to the directory holding the source of the
23# kernel that you just booted.
24# 3. Copy the configuraton file to this directory as .config
25# 4. Have all your devices that you need modules for connected and
26# operational (make sure that their corresponding modules are loaded)
27# 5. Run this script redirecting the output to some other file
28# like config_strip.
29# 6. Back up your old config (if you want too).
30# 7. copy the config_strip file to .config
31# 8. Run "make oldconfig"
32#
33# Now your kernel is ready to be built with only the modules that
34# are loaded.
35#
36# Here's what I did with my Debian distribution.
37#
38# cd /usr/src/linux-2.6.10
39# cp /boot/config-2.6.10-1-686-smp .config
40# ~/bin/streamline_config > config_strip
41# mv .config config_sav
42# mv config_strip .config
43# make oldconfig
44#
hiromucf5a1892010-08-17 19:49:18 +090045use strict;
Arnaud Lacombe22d550a2011-07-20 00:40:09 -040046use Getopt::Long;
hiromucf5a1892010-08-17 19:49:18 +090047
Steven Rostedt45033792012-06-18 22:41:15 -040048# set the environment variable LOCALMODCONFIG_DEBUG to get
49# debug output.
50my $debugprint = 0;
51$debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG}));
52
53sub dprint {
54 return if (!$debugprint);
55 print STDERR @_;
56}
57
Steven Rostedtdcc60242009-04-29 22:52:21 -040058my $config = ".config";
Steven Rostedtdcc60242009-04-29 22:52:21 -040059
Steven Rostedtcdfc4792009-04-30 14:39:48 -040060my $uname = `uname -r`;
61chomp $uname;
62
63my @searchconfigs = (
64 {
Steven Rostedta9024832009-05-07 11:01:34 -040065 "file" => ".config",
66 "exec" => "cat",
67 },
68 {
Steven Rostedtcdfc4792009-04-30 14:39:48 -040069 "file" => "/proc/config.gz",
70 "exec" => "zcat",
71 },
72 {
Steven Rostedt810b2be2009-04-30 19:30:04 -040073 "file" => "/boot/config-$uname",
74 "exec" => "cat",
75 },
76 {
Steven Rostedtcdfc4792009-04-30 14:39:48 -040077 "file" => "/boot/vmlinuz-$uname",
78 "exec" => "scripts/extract-ikconfig",
79 "test" => "scripts/extract-ikconfig",
80 },
81 {
82 "file" => "vmlinux",
83 "exec" => "scripts/extract-ikconfig",
84 "test" => "scripts/extract-ikconfig",
85 },
86 {
87 "file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
88 "exec" => "scripts/extract-ikconfig",
89 "test" => "scripts/extract-ikconfig",
90 },
91 {
92 "file" => "kernel/configs.ko",
93 "exec" => "scripts/extract-ikconfig",
94 "test" => "scripts/extract-ikconfig",
95 },
96 {
97 "file" => "kernel/configs.o",
98 "exec" => "scripts/extract-ikconfig",
99 "test" => "scripts/extract-ikconfig",
100 },
Steven Rostedtcdfc4792009-04-30 14:39:48 -0400101);
102
103sub find_config {
104 foreach my $conf (@searchconfigs) {
105 my $file = $conf->{"file"};
106
107 next if ( ! -f "$file");
108
109 if (defined($conf->{"test"})) {
110 `$conf->{"test"} $conf->{"file"} 2>/dev/null`;
111 next if ($?);
112 }
113
114 my $exec = $conf->{"exec"};
115
116 print STDERR "using config: '$file'\n";
117
118 open(CIN, "$exec $file |") || die "Failed to run $exec $file";
119 return;
120 }
121 die "No config file found";
122}
123
124find_config;
125
Steven Rostedt4f4c51c2012-06-18 21:43:53 -0400126# Read in the entire config file into config_file
127my @config_file = <CIN>;
128close CIN;
129
Arnaud Lacombe22d550a2011-07-20 00:40:09 -0400130# Parse options
131my $localmodconfig = 0;
132my $localyesconfig = 0;
133
134GetOptions("localmodconfig" => \$localmodconfig,
135 "localyesconfig" => \$localyesconfig);
136
Steven Rostedt463bf902009-11-20 09:21:12 -0500137# Get the build source and top level Kconfig file (passed in)
Bill Pemberton224a2572012-08-09 09:23:20 -0400138my $ksource = ($ARGV[0] ? $ARGV[0] : '.');
Steven Rostedt463bf902009-11-20 09:21:12 -0500139my $kconfig = $ARGV[1];
Arnaud Lacombef597a712011-07-01 17:45:31 -0400140my $lsmod_file = $ENV{'LSMOD'};
Steven Rostedt463bf902009-11-20 09:21:12 -0500141
Toralf Förster17431922010-05-26 20:22:02 +0200142my @makefiles = `find $ksource -name Makefile 2>/dev/null`;
143chomp @makefiles;
144
Steven Rostedtdcc60242009-04-29 22:52:21 -0400145my %depends;
146my %selects;
147my %prompts;
148my %objects;
149my $var;
Steven Rostedt13d7e932010-01-06 17:56:12 -0500150my $iflevel = 0;
151my @ifdeps;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400152
Steven Rostedtdcc60242009-04-29 22:52:21 -0400153# prevent recursion
154my %read_kconfigs;
155
156sub read_kconfig {
157 my ($kconfig) = @_;
158
159 my $state = "NONE";
160 my $config;
161 my @kconfigs;
162
Steven Rostedt20d19042010-10-28 22:13:51 -0400163 my $cont = 0;
164 my $line;
165
Steven Rostedt49089802010-10-29 00:56:46 -0400166 my $source = "$ksource/$kconfig";
167 my $last_source = "";
168
169 # Check for any environment variables used
170 while ($source =~ /\$(\w+)/ && $last_source ne $source) {
171 my $env = $1;
172 $last_source = $source;
173 $source =~ s/\$$env/$ENV{$env}/;
174 }
175
176 open(KIN, "$source") || die "Can't open $kconfig";
Steven Rostedtdcc60242009-04-29 22:52:21 -0400177 while (<KIN>) {
178 chomp;
179
Steven Rostedt20d19042010-10-28 22:13:51 -0400180 # Make sure that lines ending with \ continue
181 if ($cont) {
182 $_ = $line . " " . $_;
183 }
184
185 if (s/\\$//) {
186 $cont = 1;
187 $line = $_;
188 next;
189 }
190
191 $cont = 0;
192
Steven Rostedtdcc60242009-04-29 22:52:21 -0400193 # collect any Kconfig sources
194 if (/^source\s*"(.*)"/) {
195 $kconfigs[$#kconfigs+1] = $1;
196 }
197
198 # configs found
Steven Rostedt8ef17fa2010-10-28 22:21:57 -0400199 if (/^\s*(menu)?config\s+(\S+)\s*$/) {
Steven Rostedtdcc60242009-04-29 22:52:21 -0400200 $state = "NEW";
Steven Rostedt8ef17fa2010-10-28 22:21:57 -0400201 $config = $2;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400202
Steven Rostedt0b58a992012-06-18 14:09:22 -0400203 # Add depends for 'if' nesting
Steven Rostedt13d7e932010-01-06 17:56:12 -0500204 for (my $i = 0; $i < $iflevel; $i++) {
205 if ($i) {
206 $depends{$config} .= " " . $ifdeps[$i];
207 } else {
208 $depends{$config} = $ifdeps[$i];
209 }
210 $state = "DEP";
211 }
212
Steven Rostedtdcc60242009-04-29 22:52:21 -0400213 # collect the depends for the config
214 } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
215 $state = "DEP";
216 $depends{$config} = $1;
217 } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
218 $depends{$config} .= " " . $1;
219
220 # Get the configs that select this config
221 } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
Steven Rostedt0b58a992012-06-18 14:09:22 -0400222 my $conf = $1;
223 if (defined($selects{$conf})) {
224 $selects{$conf} .= " " . $config;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400225 } else {
Steven Rostedt0b58a992012-06-18 14:09:22 -0400226 $selects{$conf} = $config;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400227 }
228
229 # configs without prompts must be selected
230 } elsif ($state ne "NONE" && /^\s*tristate\s\S/) {
231 # note if the config has a prompt
hiromu yaguraccece602010-08-15 13:13:17 +0900232 $prompts{$config} = 1;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400233
Steven Rostedt13d7e932010-01-06 17:56:12 -0500234 # Check for if statements
235 } elsif (/^if\s+(.*\S)\s*$/) {
236 my $deps = $1;
237 # remove beginning and ending non text
238 $deps =~ s/^[^a-zA-Z0-9_]*//;
239 $deps =~ s/[^a-zA-Z0-9_]*$//;
240
241 my @deps = split /[^a-zA-Z0-9_]+/, $deps;
242
243 $ifdeps[$iflevel++] = join ':', @deps;
244
245 } elsif (/^endif/) {
246
247 $iflevel-- if ($iflevel);
248
Steven Rostedtdcc60242009-04-29 22:52:21 -0400249 # stop on "help"
250 } elsif (/^\s*help\s*$/) {
251 $state = "NONE";
252 }
253 }
254 close(KIN);
255
256 # read in any configs that were found.
257 foreach $kconfig (@kconfigs) {
258 if (!defined($read_kconfigs{$kconfig})) {
259 $read_kconfigs{$kconfig} = 1;
260 read_kconfig($kconfig);
261 }
262 }
263}
264
265if ($kconfig) {
266 read_kconfig($kconfig);
267}
268
Steven Rostedt0b58a992012-06-18 14:09:22 -0400269# Makefiles can use variables to define their dependencies
Steven Rostedt364212f2012-01-13 17:53:40 -0500270sub convert_vars {
271 my ($line, %vars) = @_;
272
273 my $process = "";
274
275 while ($line =~ s/^(.*?)(\$\((.*?)\))//) {
276 my $start = $1;
277 my $variable = $2;
278 my $var = $3;
279
280 if (defined($vars{$var})) {
281 $process .= $start . $vars{$var};
282 } else {
283 $process .= $start . $variable;
284 }
285 }
286
287 $process .= $line;
288
289 return $process;
290}
291
Steven Rostedtdcc60242009-04-29 22:52:21 -0400292# Read all Makefiles to map the configs to the objects
293foreach my $makefile (@makefiles) {
Steven Rostedtdcc60242009-04-29 22:52:21 -0400294
Steven Rostedtd060d962012-01-13 17:50:39 -0500295 my $line = "";
Steven Rostedt364212f2012-01-13 17:53:40 -0500296 my %make_vars;
Steven Rostedt20d19042010-10-28 22:13:51 -0400297
Steven Rostedtdcc60242009-04-29 22:52:21 -0400298 open(MIN,$makefile) || die "Can't open $makefile";
299 while (<MIN>) {
Steven Rostedtd060d962012-01-13 17:50:39 -0500300 # if this line ends with a backslash, continue
301 chomp;
302 if (/^(.*)\\$/) {
303 $line .= $1;
304 next;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400305 }
Steven Rostedtd060d962012-01-13 17:50:39 -0500306
307 $line .= $_;
308 $_ = $line;
309 $line = "";
310
311 my $objs;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400312
Steven Rostedt0b58a992012-06-18 14:09:22 -0400313 # Convert variables in a line (could define configs)
Steven Rostedt364212f2012-01-13 17:53:40 -0500314 $_ = convert_vars($_, %make_vars);
315
Steven Rostedtdcc60242009-04-29 22:52:21 -0400316 # collect objects after obj-$(CONFIG_FOO_BAR)
317 if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
318 $var = $1;
319 $objs = $2;
Steven Rostedt364212f2012-01-13 17:53:40 -0500320
321 # check if variables are set
322 } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) {
323 $make_vars{$1} = $2;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400324 }
325 if (defined($objs)) {
Steven Rostedtdcc60242009-04-29 22:52:21 -0400326 foreach my $obj (split /\s+/,$objs) {
327 $obj =~ s/-/_/g;
328 if ($obj =~ /(.*)\.o$/) {
Toralf Foerster1d1d1fe2010-05-28 10:25:52 +0200329 # Objects may be enabled by more than one config.
Steven Rostedtdcc60242009-04-29 22:52:21 -0400330 # Store configs in an array.
331 my @arr;
332
333 if (defined($objects{$1})) {
334 @arr = @{$objects{$1}};
335 }
336
337 $arr[$#arr+1] = $var;
338
339 # The objects have a hash mapping to a reference
340 # of an array of configs.
341 $objects{$1} = \@arr;
342 }
343 }
344 }
345 }
346 close(MIN);
347}
348
349my %modules;
350
Steven Rostedt615f0832010-02-02 21:51:27 -0500351if (defined($lsmod_file)) {
352 if ( ! -f $lsmod_file) {
Arnaud Lacombef597a712011-07-01 17:45:31 -0400353 if ( -f $ENV{'objtree'}."/".$lsmod_file) {
354 $lsmod_file = $ENV{'objtree'}."/".$lsmod_file;
355 } else {
356 die "$lsmod_file not found";
357 }
Steven Rostedt88f66ea2010-01-06 18:49:44 -0500358 }
Steven Rostedt615f0832010-02-02 21:51:27 -0500359 if ( -x $lsmod_file) {
360 # the file is executable, run it
361 open(LIN, "$lsmod_file|");
362 } else {
363 # Just read the contents
364 open(LIN, "$lsmod_file");
365 }
366} else {
367
368 # see what modules are loaded on this system
369 my $lsmod;
370
hiromucf5a1892010-08-17 19:49:18 +0900371 foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) {
Steven Rostedt615f0832010-02-02 21:51:27 -0500372 if ( -x "$dir/lsmod" ) {
373 $lsmod = "$dir/lsmod";
374 last;
375 }
Steven Rostedt88f66ea2010-01-06 18:49:44 -0500376}
Steven Rostedt615f0832010-02-02 21:51:27 -0500377 if (!defined($lsmod)) {
378 # try just the path
379 $lsmod = "lsmod";
380 }
381
382 open(LIN,"$lsmod|") || die "Can not call lsmod with $lsmod";
Steven Rostedt88f66ea2010-01-06 18:49:44 -0500383}
384
Steven Rostedtdcc60242009-04-29 22:52:21 -0400385while (<LIN>) {
386 next if (/^Module/); # Skip the first line.
387 if (/^(\S+)/) {
388 $modules{$1} = 1;
389 }
390}
391close (LIN);
392
393# add to the configs hash all configs that are needed to enable
Steven Rostedt0b58a992012-06-18 14:09:22 -0400394# a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o
395# where we know we need bar.o so we add FOO to the list.
Steven Rostedtdcc60242009-04-29 22:52:21 -0400396my %configs;
397foreach my $module (keys(%modules)) {
398 if (defined($objects{$module})) {
Toralf Foerstere5199ed2010-05-28 10:24:59 +0200399 my @arr = @{$objects{$module}};
Steven Rostedtdcc60242009-04-29 22:52:21 -0400400 foreach my $conf (@arr) {
401 $configs{$conf} = $module;
Steven Rostedt45033792012-06-18 22:41:15 -0400402 dprint "$conf added by direct ($module)\n";
Steven Rostedtdcc60242009-04-29 22:52:21 -0400403 }
404 } else {
405 # Most likely, someone has a custom (binary?) module loaded.
406 print STDERR "$module config not found!!\n";
407 }
408}
409
Steven Rostedt4f4c51c2012-06-18 21:43:53 -0400410# Read the current config, and see what is enabled. We want to
411# ignore configs that we would not enable anyway.
412
413my %orig_configs;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400414my $valid = "A-Za-z_0-9";
Steven Rostedt4f4c51c2012-06-18 21:43:53 -0400415
416foreach my $line (@config_file) {
417 $_ = $line;
418
419 if (/(CONFIG_[$valid]*)=(m|y)/) {
420 $orig_configs{$1} = $2;
421 }
422}
423
Steven Rostedtdcc60242009-04-29 22:52:21 -0400424my $repeat = 1;
425
Steven Rostedt45033792012-06-18 22:41:15 -0400426my $depconfig;
427
Steven Rostedtdcc60242009-04-29 22:52:21 -0400428#
429# Note, we do not care about operands (like: &&, ||, !) we want to add any
430# config that is in the depend list of another config. This script does
431# not enable configs that are not already enabled. If we come across a
432# config A that depends on !B, we can still add B to the list of depends
433# to keep on. If A was on in the original config, B would not have been
434# and B would not be turned on by this script.
435#
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400436sub parse_config_depends
Steven Rostedtdcc60242009-04-29 22:52:21 -0400437{
438 my ($p) = @_;
439
440 while ($p =~ /[$valid]/) {
441
442 if ($p =~ /^[^$valid]*([$valid]+)/) {
443 my $conf = "CONFIG_" . $1;
444
445 $p =~ s/^[^$valid]*[$valid]+//;
446
Steven Rostedt4f4c51c2012-06-18 21:43:53 -0400447 # We only need to process if the depend config is a module
448 if (!defined($orig_configs{$conf}) || !$orig_configs{conf} eq "m") {
449 next;
450 }
451
Steven Rostedtdcc60242009-04-29 22:52:21 -0400452 if (!defined($configs{$conf})) {
453 # We must make sure that this config has its
454 # dependencies met.
455 $repeat = 1; # do again
Steven Rostedt45033792012-06-18 22:41:15 -0400456 dprint "$conf selected by depend $depconfig\n";
Steven Rostedtdcc60242009-04-29 22:52:21 -0400457 $configs{$conf} = 1;
458 }
459 } else {
460 die "this should never happen";
461 }
462 }
463}
464
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400465# Select is treated a bit differently than depends. We call this
466# when a config has no prompt and requires another config to be
467# selected. We use to just select all configs that selected this
468# config, but found that that can balloon into enabling hundreds
469# of configs that we do not care about.
470#
471# The idea is we look at all the configs that select it. If one
472# is already in our list of configs to enable, then there's nothing
473# else to do. If there isn't, we pick the first config that was
474# enabled in the orignal config and use that.
475sub parse_config_selects
476{
477 my ($config, $p) = @_;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400478
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400479 my $next_config;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400480
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400481 while ($p =~ /[$valid]/) {
482
483 if ($p =~ /^[^$valid]*([$valid]+)/) {
484 my $conf = "CONFIG_" . $1;
485
486 $p =~ s/^[^$valid]*[$valid]+//;
487
488 # Make sure that this config exists in the current .config file
489 if (!defined($orig_configs{$conf})) {
Steven Rostedt45033792012-06-18 22:41:15 -0400490 dprint "$conf not set for $config select\n";
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400491 next;
492 }
493
494 # Check if something other than a module selects this config
495 if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") {
Steven Rostedt45033792012-06-18 22:41:15 -0400496 dprint "$conf (non module) selects config, we are good\n";
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400497 # we are good with this
498 return;
499 }
500 if (defined($configs{$conf})) {
Steven Rostedt45033792012-06-18 22:41:15 -0400501 dprint "$conf selects $config so we are good\n";
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400502 # A set config selects this config, we are good
503 return;
504 }
505 # Set this config to be selected
506 if (!defined($next_config)) {
507 $next_config = $conf;
508 }
509 } else {
510 die "this should never happen";
Steven Rostedtdcc60242009-04-29 22:52:21 -0400511 }
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400512 }
Steven Rostedtdcc60242009-04-29 22:52:21 -0400513
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400514 # If no possible config selected this, then something happened.
515 if (!defined($next_config)) {
516 print STDERR "WARNING: $config is required, but nothing in the\n";
517 print STDERR " current config selects it.\n";
518 return;
519 }
520
521 # If we are here, then we found no config that is set and
522 # selects this config. Repeat.
523 $repeat = 1;
524 # Make this config need to be selected
525 $configs{$next_config} = 1;
Steven Rostedt45033792012-06-18 22:41:15 -0400526 dprint "$next_config selected by select $config\n";
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400527}
528
529my %process_selects;
530
531# loop through all configs, select their dependencies.
532sub loop_depend {
533 $repeat = 1;
534
535 while ($repeat) {
536 $repeat = 0;
537
538 forloop:
539 foreach my $config (keys %configs) {
540
541 # If this config is not a module, we do not need to process it
542 if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") {
543 next forloop;
544 }
545
546 $config =~ s/^CONFIG_//;
Steven Rostedt45033792012-06-18 22:41:15 -0400547 $depconfig = $config;
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400548
549 if (defined($depends{$config})) {
550 # This config has dependencies. Make sure they are also included
551 parse_config_depends $depends{$config};
552 }
553
554 # If the config has no prompt, then we need to check if a config
555 # that is enabled selected it. Or if we need to enable one.
556 if (!defined($prompts{$config}) && defined($selects{$config})) {
557 $process_selects{$config} = 1;
558 }
Steven Rostedtdcc60242009-04-29 22:52:21 -0400559 }
Steven Rostedtdcc60242009-04-29 22:52:21 -0400560 }
561}
562
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400563sub loop_select {
564
565 foreach my $config (keys %process_selects) {
566 $config =~ s/^CONFIG_//;
567
Steven Rostedt45033792012-06-18 22:41:15 -0400568 dprint "Process select $config\n";
569
Steven Rostedtd4bb58b2012-06-18 22:22:33 -0400570 # config has no prompt and must be selected.
571 parse_config_selects $config, $selects{$config};
572 }
573}
574
575while ($repeat) {
576 # Get the first set of configs and their dependencies.
577 loop_depend;
578
579 $repeat = 0;
580
581 # Now we need to see if we have to check selects;
582 loop_select;
583}
584
Steven Rostedtdcc60242009-04-29 22:52:21 -0400585my %setconfigs;
586
587# Finally, read the .config file and turn off any module enabled that
588# we could not find a reason to keep enabled.
Steven Rostedt4f4c51c2012-06-18 21:43:53 -0400589foreach my $line (@config_file) {
590 $_ = $line;
Steven Rostedt744ffcb2009-04-30 12:15:10 -0400591
592 if (/CONFIG_IKCONFIG/) {
593 if (/# CONFIG_IKCONFIG is not set/) {
594 # enable IKCONFIG at least as a module
595 print "CONFIG_IKCONFIG=m\n";
596 # don't ask about PROC
Steven Rostedtd08ca272009-04-30 19:24:00 -0400597 print "# CONFIG_IKCONFIG_PROC is not set\n";
Steven Rostedtdcc60242009-04-29 22:52:21 -0400598 } else {
Steven Rostedt744ffcb2009-04-30 12:15:10 -0400599 print;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400600 }
Steven Rostedt744ffcb2009-04-30 12:15:10 -0400601 next;
602 }
603
604 if (/^(CONFIG.*)=(m|y)/) {
605 if (defined($configs{$1})) {
Arnaud Lacombe22d550a2011-07-20 00:40:09 -0400606 if ($localyesconfig) {
607 $setconfigs{$1} = 'y';
608 } else {
609 $setconfigs{$1} = $2;
610 }
Steven Rostedt744ffcb2009-04-30 12:15:10 -0400611 } elsif ($2 eq "m") {
612 print "# $1 is not set\n";
Steven Rostedtd08ca272009-04-30 19:24:00 -0400613 next;
Steven Rostedt744ffcb2009-04-30 12:15:10 -0400614 }
Steven Rostedt744ffcb2009-04-30 12:15:10 -0400615 }
Steven Rostedtd08ca272009-04-30 19:24:00 -0400616 print;
Steven Rostedtdcc60242009-04-29 22:52:21 -0400617}
Steven Rostedtdcc60242009-04-29 22:52:21 -0400618
619# Integrity check, make sure all modules that we want enabled do
620# indeed have their configs set.
621loop:
622foreach my $module (keys(%modules)) {
623 if (defined($objects{$module})) {
624 my @arr = @{$objects{$module}};
625 foreach my $conf (@arr) {
626 if (defined($setconfigs{$conf})) {
627 next loop;
628 }
629 }
630 print STDERR "module $module did not have configs";
631 foreach my $conf (@arr) {
632 print STDERR " " , $conf;
633 }
634 print STDERR "\n";
635 }
636}