Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 1 | #!/usr/bin/perl -w |
| 2 | # |
Uwe Kleine-König | cce1dac | 2011-01-24 21:12:01 +0100 | [diff] [blame] | 3 | # Copyright 2005-2009 - Steven Rostedt |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 4 | # 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 | # |
hiromu | cf5a189 | 2010-08-17 19:49:18 +0900 | [diff] [blame] | 45 | use strict; |
Arnaud Lacombe | 22d550a | 2011-07-20 00:40:09 -0400 | [diff] [blame] | 46 | use Getopt::Long; |
hiromu | cf5a189 | 2010-08-17 19:49:18 +0900 | [diff] [blame] | 47 | |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 48 | # set the environment variable LOCALMODCONFIG_DEBUG to get |
| 49 | # debug output. |
| 50 | my $debugprint = 0; |
| 51 | $debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG})); |
| 52 | |
| 53 | sub dprint { |
| 54 | return if (!$debugprint); |
| 55 | print STDERR @_; |
| 56 | } |
| 57 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 58 | my $config = ".config"; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 59 | |
Steven Rostedt | cdfc479 | 2009-04-30 14:39:48 -0400 | [diff] [blame] | 60 | my $uname = `uname -r`; |
| 61 | chomp $uname; |
| 62 | |
| 63 | my @searchconfigs = ( |
| 64 | { |
Steven Rostedt | a902483 | 2009-05-07 11:01:34 -0400 | [diff] [blame] | 65 | "file" => ".config", |
| 66 | "exec" => "cat", |
| 67 | }, |
| 68 | { |
Steven Rostedt | cdfc479 | 2009-04-30 14:39:48 -0400 | [diff] [blame] | 69 | "file" => "/proc/config.gz", |
| 70 | "exec" => "zcat", |
| 71 | }, |
| 72 | { |
Steven Rostedt | 810b2be | 2009-04-30 19:30:04 -0400 | [diff] [blame] | 73 | "file" => "/boot/config-$uname", |
| 74 | "exec" => "cat", |
| 75 | }, |
| 76 | { |
Steven Rostedt | cdfc479 | 2009-04-30 14:39:48 -0400 | [diff] [blame] | 77 | "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 Rostedt | cdfc479 | 2009-04-30 14:39:48 -0400 | [diff] [blame] | 101 | ); |
| 102 | |
Bill Pemberton | 3f0c541 | 2012-08-09 09:23:21 -0400 | [diff] [blame] | 103 | sub read_config { |
Steven Rostedt | cdfc479 | 2009-04-30 14:39:48 -0400 | [diff] [blame] | 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 | |
Bill Pemberton | 3f0c541 | 2012-08-09 09:23:21 -0400 | [diff] [blame] | 118 | open(my $infile, '-|', "$exec $file") || die "Failed to run $exec $file"; |
| 119 | my @x = <$infile>; |
| 120 | close $infile; |
| 121 | return @x; |
Steven Rostedt | cdfc479 | 2009-04-30 14:39:48 -0400 | [diff] [blame] | 122 | } |
| 123 | die "No config file found"; |
| 124 | } |
| 125 | |
Bill Pemberton | 3f0c541 | 2012-08-09 09:23:21 -0400 | [diff] [blame] | 126 | my @config_file = read_config; |
Steven Rostedt | 4f4c51c | 2012-06-18 21:43:53 -0400 | [diff] [blame] | 127 | |
Arnaud Lacombe | 22d550a | 2011-07-20 00:40:09 -0400 | [diff] [blame] | 128 | # Parse options |
| 129 | my $localmodconfig = 0; |
| 130 | my $localyesconfig = 0; |
| 131 | |
| 132 | GetOptions("localmodconfig" => \$localmodconfig, |
| 133 | "localyesconfig" => \$localyesconfig); |
| 134 | |
Steven Rostedt | 463bf90 | 2009-11-20 09:21:12 -0500 | [diff] [blame] | 135 | # Get the build source and top level Kconfig file (passed in) |
Bill Pemberton | 224a257 | 2012-08-09 09:23:20 -0400 | [diff] [blame] | 136 | my $ksource = ($ARGV[0] ? $ARGV[0] : '.'); |
Steven Rostedt | 463bf90 | 2009-11-20 09:21:12 -0500 | [diff] [blame] | 137 | my $kconfig = $ARGV[1]; |
Arnaud Lacombe | f597a71 | 2011-07-01 17:45:31 -0400 | [diff] [blame] | 138 | my $lsmod_file = $ENV{'LSMOD'}; |
Steven Rostedt | 463bf90 | 2009-11-20 09:21:12 -0500 | [diff] [blame] | 139 | |
Toralf Förster | 1743192 | 2010-05-26 20:22:02 +0200 | [diff] [blame] | 140 | my @makefiles = `find $ksource -name Makefile 2>/dev/null`; |
| 141 | chomp @makefiles; |
| 142 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 143 | my %depends; |
| 144 | my %selects; |
| 145 | my %prompts; |
| 146 | my %objects; |
| 147 | my $var; |
Steven Rostedt | 13d7e93 | 2010-01-06 17:56:12 -0500 | [diff] [blame] | 148 | my $iflevel = 0; |
| 149 | my @ifdeps; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 150 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 151 | # prevent recursion |
| 152 | my %read_kconfigs; |
| 153 | |
| 154 | sub read_kconfig { |
| 155 | my ($kconfig) = @_; |
| 156 | |
| 157 | my $state = "NONE"; |
| 158 | my $config; |
| 159 | my @kconfigs; |
| 160 | |
Steven Rostedt | 20d1904 | 2010-10-28 22:13:51 -0400 | [diff] [blame] | 161 | my $cont = 0; |
| 162 | my $line; |
| 163 | |
Steven Rostedt | 4908980 | 2010-10-29 00:56:46 -0400 | [diff] [blame] | 164 | my $source = "$ksource/$kconfig"; |
| 165 | my $last_source = ""; |
| 166 | |
| 167 | # Check for any environment variables used |
| 168 | while ($source =~ /\$(\w+)/ && $last_source ne $source) { |
| 169 | my $env = $1; |
| 170 | $last_source = $source; |
| 171 | $source =~ s/\$$env/$ENV{$env}/; |
| 172 | } |
| 173 | |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 174 | open(my $kinfile, '<', $source) || die "Can't open $kconfig"; |
| 175 | while (<$kinfile>) { |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 176 | chomp; |
| 177 | |
Steven Rostedt | 20d1904 | 2010-10-28 22:13:51 -0400 | [diff] [blame] | 178 | # Make sure that lines ending with \ continue |
| 179 | if ($cont) { |
| 180 | $_ = $line . " " . $_; |
| 181 | } |
| 182 | |
| 183 | if (s/\\$//) { |
| 184 | $cont = 1; |
| 185 | $line = $_; |
| 186 | next; |
| 187 | } |
| 188 | |
| 189 | $cont = 0; |
| 190 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 191 | # collect any Kconfig sources |
| 192 | if (/^source\s*"(.*)"/) { |
| 193 | $kconfigs[$#kconfigs+1] = $1; |
| 194 | } |
| 195 | |
| 196 | # configs found |
Steven Rostedt | 8ef17fa | 2010-10-28 22:21:57 -0400 | [diff] [blame] | 197 | if (/^\s*(menu)?config\s+(\S+)\s*$/) { |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 198 | $state = "NEW"; |
Steven Rostedt | 8ef17fa | 2010-10-28 22:21:57 -0400 | [diff] [blame] | 199 | $config = $2; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 200 | |
Steven Rostedt | 0b58a99 | 2012-06-18 14:09:22 -0400 | [diff] [blame] | 201 | # Add depends for 'if' nesting |
Steven Rostedt | 13d7e93 | 2010-01-06 17:56:12 -0500 | [diff] [blame] | 202 | for (my $i = 0; $i < $iflevel; $i++) { |
| 203 | if ($i) { |
| 204 | $depends{$config} .= " " . $ifdeps[$i]; |
| 205 | } else { |
| 206 | $depends{$config} = $ifdeps[$i]; |
| 207 | } |
| 208 | $state = "DEP"; |
| 209 | } |
| 210 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 211 | # collect the depends for the config |
| 212 | } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) { |
| 213 | $state = "DEP"; |
| 214 | $depends{$config} = $1; |
| 215 | } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) { |
| 216 | $depends{$config} .= " " . $1; |
| 217 | |
| 218 | # Get the configs that select this config |
| 219 | } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) { |
Steven Rostedt | 0b58a99 | 2012-06-18 14:09:22 -0400 | [diff] [blame] | 220 | my $conf = $1; |
| 221 | if (defined($selects{$conf})) { |
| 222 | $selects{$conf} .= " " . $config; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 223 | } else { |
Steven Rostedt | 0b58a99 | 2012-06-18 14:09:22 -0400 | [diff] [blame] | 224 | $selects{$conf} = $config; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 225 | } |
| 226 | |
| 227 | # configs without prompts must be selected |
| 228 | } elsif ($state ne "NONE" && /^\s*tristate\s\S/) { |
| 229 | # note if the config has a prompt |
hiromu yagura | ccece60 | 2010-08-15 13:13:17 +0900 | [diff] [blame] | 230 | $prompts{$config} = 1; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 231 | |
Steven Rostedt | 13d7e93 | 2010-01-06 17:56:12 -0500 | [diff] [blame] | 232 | # Check for if statements |
| 233 | } elsif (/^if\s+(.*\S)\s*$/) { |
| 234 | my $deps = $1; |
| 235 | # remove beginning and ending non text |
| 236 | $deps =~ s/^[^a-zA-Z0-9_]*//; |
| 237 | $deps =~ s/[^a-zA-Z0-9_]*$//; |
| 238 | |
| 239 | my @deps = split /[^a-zA-Z0-9_]+/, $deps; |
| 240 | |
| 241 | $ifdeps[$iflevel++] = join ':', @deps; |
| 242 | |
| 243 | } elsif (/^endif/) { |
| 244 | |
| 245 | $iflevel-- if ($iflevel); |
| 246 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 247 | # stop on "help" |
| 248 | } elsif (/^\s*help\s*$/) { |
| 249 | $state = "NONE"; |
| 250 | } |
| 251 | } |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 252 | close($kinfile); |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 253 | |
| 254 | # read in any configs that were found. |
Bill Pemberton | 45f4c81 | 2012-08-09 09:23:23 -0400 | [diff] [blame] | 255 | foreach my $kconfig (@kconfigs) { |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 256 | if (!defined($read_kconfigs{$kconfig})) { |
| 257 | $read_kconfigs{$kconfig} = 1; |
| 258 | read_kconfig($kconfig); |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | if ($kconfig) { |
| 264 | read_kconfig($kconfig); |
| 265 | } |
| 266 | |
Steven Rostedt | 0b58a99 | 2012-06-18 14:09:22 -0400 | [diff] [blame] | 267 | # Makefiles can use variables to define their dependencies |
Steven Rostedt | 364212f | 2012-01-13 17:53:40 -0500 | [diff] [blame] | 268 | sub convert_vars { |
| 269 | my ($line, %vars) = @_; |
| 270 | |
| 271 | my $process = ""; |
| 272 | |
| 273 | while ($line =~ s/^(.*?)(\$\((.*?)\))//) { |
| 274 | my $start = $1; |
| 275 | my $variable = $2; |
| 276 | my $var = $3; |
| 277 | |
| 278 | if (defined($vars{$var})) { |
| 279 | $process .= $start . $vars{$var}; |
| 280 | } else { |
| 281 | $process .= $start . $variable; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | $process .= $line; |
| 286 | |
| 287 | return $process; |
| 288 | } |
| 289 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 290 | # Read all Makefiles to map the configs to the objects |
| 291 | foreach my $makefile (@makefiles) { |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 292 | |
Steven Rostedt | d060d96 | 2012-01-13 17:50:39 -0500 | [diff] [blame] | 293 | my $line = ""; |
Steven Rostedt | 364212f | 2012-01-13 17:53:40 -0500 | [diff] [blame] | 294 | my %make_vars; |
Steven Rostedt | 20d1904 | 2010-10-28 22:13:51 -0400 | [diff] [blame] | 295 | |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 296 | open(my $infile, '<', $makefile) || die "Can't open $makefile"; |
| 297 | while (<$infile>) { |
Steven Rostedt | d060d96 | 2012-01-13 17:50:39 -0500 | [diff] [blame] | 298 | # if this line ends with a backslash, continue |
| 299 | chomp; |
| 300 | if (/^(.*)\\$/) { |
| 301 | $line .= $1; |
| 302 | next; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 303 | } |
Steven Rostedt | d060d96 | 2012-01-13 17:50:39 -0500 | [diff] [blame] | 304 | |
| 305 | $line .= $_; |
| 306 | $_ = $line; |
| 307 | $line = ""; |
| 308 | |
| 309 | my $objs; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 310 | |
Steven Rostedt | 0b58a99 | 2012-06-18 14:09:22 -0400 | [diff] [blame] | 311 | # Convert variables in a line (could define configs) |
Steven Rostedt | 364212f | 2012-01-13 17:53:40 -0500 | [diff] [blame] | 312 | $_ = convert_vars($_, %make_vars); |
| 313 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 314 | # collect objects after obj-$(CONFIG_FOO_BAR) |
| 315 | if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) { |
| 316 | $var = $1; |
| 317 | $objs = $2; |
Steven Rostedt | 364212f | 2012-01-13 17:53:40 -0500 | [diff] [blame] | 318 | |
| 319 | # check if variables are set |
| 320 | } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) { |
| 321 | $make_vars{$1} = $2; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 322 | } |
| 323 | if (defined($objs)) { |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 324 | foreach my $obj (split /\s+/,$objs) { |
| 325 | $obj =~ s/-/_/g; |
| 326 | if ($obj =~ /(.*)\.o$/) { |
Toralf Foerster | 1d1d1fe | 2010-05-28 10:25:52 +0200 | [diff] [blame] | 327 | # Objects may be enabled by more than one config. |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 328 | # Store configs in an array. |
| 329 | my @arr; |
| 330 | |
| 331 | if (defined($objects{$1})) { |
| 332 | @arr = @{$objects{$1}}; |
| 333 | } |
| 334 | |
| 335 | $arr[$#arr+1] = $var; |
| 336 | |
| 337 | # The objects have a hash mapping to a reference |
| 338 | # of an array of configs. |
| 339 | $objects{$1} = \@arr; |
| 340 | } |
| 341 | } |
| 342 | } |
| 343 | } |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 344 | close($infile); |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | my %modules; |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 348 | my $linfile; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 349 | |
Steven Rostedt | 615f083 | 2010-02-02 21:51:27 -0500 | [diff] [blame] | 350 | if (defined($lsmod_file)) { |
| 351 | if ( ! -f $lsmod_file) { |
Arnaud Lacombe | f597a71 | 2011-07-01 17:45:31 -0400 | [diff] [blame] | 352 | if ( -f $ENV{'objtree'}."/".$lsmod_file) { |
| 353 | $lsmod_file = $ENV{'objtree'}."/".$lsmod_file; |
| 354 | } else { |
| 355 | die "$lsmod_file not found"; |
| 356 | } |
Steven Rostedt | 88f66ea | 2010-01-06 18:49:44 -0500 | [diff] [blame] | 357 | } |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 358 | |
| 359 | my $otype = ( -x $lsmod_file) ? '-|' : '<'; |
| 360 | open($linfile, $otype, $lsmod_file); |
| 361 | |
Steven Rostedt | 615f083 | 2010-02-02 21:51:27 -0500 | [diff] [blame] | 362 | } else { |
| 363 | |
| 364 | # see what modules are loaded on this system |
| 365 | my $lsmod; |
| 366 | |
hiromu | cf5a189 | 2010-08-17 19:49:18 +0900 | [diff] [blame] | 367 | foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) { |
Steven Rostedt | 615f083 | 2010-02-02 21:51:27 -0500 | [diff] [blame] | 368 | if ( -x "$dir/lsmod" ) { |
| 369 | $lsmod = "$dir/lsmod"; |
| 370 | last; |
| 371 | } |
Steven Rostedt | 88f66ea | 2010-01-06 18:49:44 -0500 | [diff] [blame] | 372 | } |
Steven Rostedt | 615f083 | 2010-02-02 21:51:27 -0500 | [diff] [blame] | 373 | if (!defined($lsmod)) { |
| 374 | # try just the path |
| 375 | $lsmod = "lsmod"; |
| 376 | } |
| 377 | |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 378 | open($linfile, '-|', $lsmod) || die "Can not call lsmod with $lsmod"; |
Steven Rostedt | 88f66ea | 2010-01-06 18:49:44 -0500 | [diff] [blame] | 379 | } |
| 380 | |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 381 | while (<$linfile>) { |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 382 | next if (/^Module/); # Skip the first line. |
| 383 | if (/^(\S+)/) { |
| 384 | $modules{$1} = 1; |
| 385 | } |
| 386 | } |
Bill Pemberton | e0d2869 | 2012-08-09 09:23:22 -0400 | [diff] [blame] | 387 | close ($linfile); |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 388 | |
| 389 | # add to the configs hash all configs that are needed to enable |
Steven Rostedt | 0b58a99 | 2012-06-18 14:09:22 -0400 | [diff] [blame] | 390 | # a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o |
| 391 | # where we know we need bar.o so we add FOO to the list. |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 392 | my %configs; |
| 393 | foreach my $module (keys(%modules)) { |
| 394 | if (defined($objects{$module})) { |
Toralf Foerster | e5199ed | 2010-05-28 10:24:59 +0200 | [diff] [blame] | 395 | my @arr = @{$objects{$module}}; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 396 | foreach my $conf (@arr) { |
| 397 | $configs{$conf} = $module; |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 398 | dprint "$conf added by direct ($module)\n"; |
Steven Rostedt | bc20d12 | 2013-04-29 15:17:40 -0400 | [diff] [blame^] | 399 | if ($debugprint) { |
| 400 | my $c=$conf; |
| 401 | $c =~ s/^CONFIG_//; |
| 402 | if (defined($depends{$c})) { |
| 403 | dprint " deps = $depends{$c}\n"; |
| 404 | } else { |
| 405 | dprint " no deps\n"; |
| 406 | } |
| 407 | } |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 408 | } |
| 409 | } else { |
| 410 | # Most likely, someone has a custom (binary?) module loaded. |
| 411 | print STDERR "$module config not found!!\n"; |
| 412 | } |
| 413 | } |
| 414 | |
Steven Rostedt | 4f4c51c | 2012-06-18 21:43:53 -0400 | [diff] [blame] | 415 | # Read the current config, and see what is enabled. We want to |
| 416 | # ignore configs that we would not enable anyway. |
| 417 | |
| 418 | my %orig_configs; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 419 | my $valid = "A-Za-z_0-9"; |
Steven Rostedt | 4f4c51c | 2012-06-18 21:43:53 -0400 | [diff] [blame] | 420 | |
| 421 | foreach my $line (@config_file) { |
| 422 | $_ = $line; |
| 423 | |
| 424 | if (/(CONFIG_[$valid]*)=(m|y)/) { |
| 425 | $orig_configs{$1} = $2; |
| 426 | } |
| 427 | } |
| 428 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 429 | my $repeat = 1; |
| 430 | |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 431 | my $depconfig; |
| 432 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 433 | # |
| 434 | # Note, we do not care about operands (like: &&, ||, !) we want to add any |
| 435 | # config that is in the depend list of another config. This script does |
| 436 | # not enable configs that are not already enabled. If we come across a |
| 437 | # config A that depends on !B, we can still add B to the list of depends |
| 438 | # to keep on. If A was on in the original config, B would not have been |
| 439 | # and B would not be turned on by this script. |
| 440 | # |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 441 | sub parse_config_depends |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 442 | { |
| 443 | my ($p) = @_; |
| 444 | |
| 445 | while ($p =~ /[$valid]/) { |
| 446 | |
| 447 | if ($p =~ /^[^$valid]*([$valid]+)/) { |
| 448 | my $conf = "CONFIG_" . $1; |
| 449 | |
| 450 | $p =~ s/^[^$valid]*[$valid]+//; |
| 451 | |
Steven Rostedt | 4f4c51c | 2012-06-18 21:43:53 -0400 | [diff] [blame] | 452 | # We only need to process if the depend config is a module |
| 453 | if (!defined($orig_configs{$conf}) || !$orig_configs{conf} eq "m") { |
| 454 | next; |
| 455 | } |
| 456 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 457 | if (!defined($configs{$conf})) { |
| 458 | # We must make sure that this config has its |
| 459 | # dependencies met. |
| 460 | $repeat = 1; # do again |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 461 | dprint "$conf selected by depend $depconfig\n"; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 462 | $configs{$conf} = 1; |
| 463 | } |
| 464 | } else { |
| 465 | die "this should never happen"; |
| 466 | } |
| 467 | } |
| 468 | } |
| 469 | |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 470 | # Select is treated a bit differently than depends. We call this |
| 471 | # when a config has no prompt and requires another config to be |
| 472 | # selected. We use to just select all configs that selected this |
| 473 | # config, but found that that can balloon into enabling hundreds |
| 474 | # of configs that we do not care about. |
| 475 | # |
| 476 | # The idea is we look at all the configs that select it. If one |
| 477 | # is already in our list of configs to enable, then there's nothing |
| 478 | # else to do. If there isn't, we pick the first config that was |
| 479 | # enabled in the orignal config and use that. |
| 480 | sub parse_config_selects |
| 481 | { |
| 482 | my ($config, $p) = @_; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 483 | |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 484 | my $next_config; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 485 | |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 486 | while ($p =~ /[$valid]/) { |
| 487 | |
| 488 | if ($p =~ /^[^$valid]*([$valid]+)/) { |
| 489 | my $conf = "CONFIG_" . $1; |
| 490 | |
| 491 | $p =~ s/^[^$valid]*[$valid]+//; |
| 492 | |
| 493 | # Make sure that this config exists in the current .config file |
| 494 | if (!defined($orig_configs{$conf})) { |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 495 | dprint "$conf not set for $config select\n"; |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 496 | next; |
| 497 | } |
| 498 | |
| 499 | # Check if something other than a module selects this config |
| 500 | if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") { |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 501 | dprint "$conf (non module) selects config, we are good\n"; |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 502 | # we are good with this |
| 503 | return; |
| 504 | } |
| 505 | if (defined($configs{$conf})) { |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 506 | dprint "$conf selects $config so we are good\n"; |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 507 | # A set config selects this config, we are good |
| 508 | return; |
| 509 | } |
| 510 | # Set this config to be selected |
| 511 | if (!defined($next_config)) { |
| 512 | $next_config = $conf; |
| 513 | } |
| 514 | } else { |
| 515 | die "this should never happen"; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 516 | } |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 517 | } |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 518 | |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 519 | # If no possible config selected this, then something happened. |
| 520 | if (!defined($next_config)) { |
| 521 | print STDERR "WARNING: $config is required, but nothing in the\n"; |
| 522 | print STDERR " current config selects it.\n"; |
| 523 | return; |
| 524 | } |
| 525 | |
| 526 | # If we are here, then we found no config that is set and |
| 527 | # selects this config. Repeat. |
| 528 | $repeat = 1; |
| 529 | # Make this config need to be selected |
| 530 | $configs{$next_config} = 1; |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 531 | dprint "$next_config selected by select $config\n"; |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 532 | } |
| 533 | |
| 534 | my %process_selects; |
| 535 | |
| 536 | # loop through all configs, select their dependencies. |
| 537 | sub loop_depend { |
| 538 | $repeat = 1; |
| 539 | |
| 540 | while ($repeat) { |
| 541 | $repeat = 0; |
| 542 | |
| 543 | forloop: |
| 544 | foreach my $config (keys %configs) { |
| 545 | |
| 546 | # If this config is not a module, we do not need to process it |
| 547 | if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") { |
| 548 | next forloop; |
| 549 | } |
| 550 | |
| 551 | $config =~ s/^CONFIG_//; |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 552 | $depconfig = $config; |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 553 | |
| 554 | if (defined($depends{$config})) { |
| 555 | # This config has dependencies. Make sure they are also included |
| 556 | parse_config_depends $depends{$config}; |
| 557 | } |
| 558 | |
| 559 | # If the config has no prompt, then we need to check if a config |
| 560 | # that is enabled selected it. Or if we need to enable one. |
| 561 | if (!defined($prompts{$config}) && defined($selects{$config})) { |
| 562 | $process_selects{$config} = 1; |
| 563 | } |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 564 | } |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 565 | } |
| 566 | } |
| 567 | |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 568 | sub loop_select { |
| 569 | |
| 570 | foreach my $config (keys %process_selects) { |
| 571 | $config =~ s/^CONFIG_//; |
| 572 | |
Steven Rostedt | 4503379 | 2012-06-18 22:41:15 -0400 | [diff] [blame] | 573 | dprint "Process select $config\n"; |
| 574 | |
Steven Rostedt | d4bb58b | 2012-06-18 22:22:33 -0400 | [diff] [blame] | 575 | # config has no prompt and must be selected. |
| 576 | parse_config_selects $config, $selects{$config}; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | while ($repeat) { |
| 581 | # Get the first set of configs and their dependencies. |
| 582 | loop_depend; |
| 583 | |
| 584 | $repeat = 0; |
| 585 | |
| 586 | # Now we need to see if we have to check selects; |
| 587 | loop_select; |
| 588 | } |
| 589 | |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 590 | my %setconfigs; |
| 591 | |
| 592 | # Finally, read the .config file and turn off any module enabled that |
| 593 | # we could not find a reason to keep enabled. |
Steven Rostedt | 4f4c51c | 2012-06-18 21:43:53 -0400 | [diff] [blame] | 594 | foreach my $line (@config_file) { |
| 595 | $_ = $line; |
Steven Rostedt | 744ffcb | 2009-04-30 12:15:10 -0400 | [diff] [blame] | 596 | |
| 597 | if (/CONFIG_IKCONFIG/) { |
| 598 | if (/# CONFIG_IKCONFIG is not set/) { |
| 599 | # enable IKCONFIG at least as a module |
| 600 | print "CONFIG_IKCONFIG=m\n"; |
| 601 | # don't ask about PROC |
Steven Rostedt | d08ca27 | 2009-04-30 19:24:00 -0400 | [diff] [blame] | 602 | print "# CONFIG_IKCONFIG_PROC is not set\n"; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 603 | } else { |
Steven Rostedt | 744ffcb | 2009-04-30 12:15:10 -0400 | [diff] [blame] | 604 | print; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 605 | } |
Steven Rostedt | 744ffcb | 2009-04-30 12:15:10 -0400 | [diff] [blame] | 606 | next; |
| 607 | } |
| 608 | |
| 609 | if (/^(CONFIG.*)=(m|y)/) { |
| 610 | if (defined($configs{$1})) { |
Arnaud Lacombe | 22d550a | 2011-07-20 00:40:09 -0400 | [diff] [blame] | 611 | if ($localyesconfig) { |
| 612 | $setconfigs{$1} = 'y'; |
Yuta Ando | 4eae518 | 2012-10-01 23:24:30 +0900 | [diff] [blame] | 613 | print "$1=y\n"; |
| 614 | next; |
Arnaud Lacombe | 22d550a | 2011-07-20 00:40:09 -0400 | [diff] [blame] | 615 | } else { |
| 616 | $setconfigs{$1} = $2; |
| 617 | } |
Steven Rostedt | 744ffcb | 2009-04-30 12:15:10 -0400 | [diff] [blame] | 618 | } elsif ($2 eq "m") { |
| 619 | print "# $1 is not set\n"; |
Steven Rostedt | d08ca27 | 2009-04-30 19:24:00 -0400 | [diff] [blame] | 620 | next; |
Steven Rostedt | 744ffcb | 2009-04-30 12:15:10 -0400 | [diff] [blame] | 621 | } |
Steven Rostedt | 744ffcb | 2009-04-30 12:15:10 -0400 | [diff] [blame] | 622 | } |
Steven Rostedt | d08ca27 | 2009-04-30 19:24:00 -0400 | [diff] [blame] | 623 | print; |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 624 | } |
Steven Rostedt | dcc6024 | 2009-04-29 22:52:21 -0400 | [diff] [blame] | 625 | |
| 626 | # Integrity check, make sure all modules that we want enabled do |
| 627 | # indeed have their configs set. |
| 628 | loop: |
| 629 | foreach my $module (keys(%modules)) { |
| 630 | if (defined($objects{$module})) { |
| 631 | my @arr = @{$objects{$module}}; |
| 632 | foreach my $conf (@arr) { |
| 633 | if (defined($setconfigs{$conf})) { |
| 634 | next loop; |
| 635 | } |
| 636 | } |
| 637 | print STDERR "module $module did not have configs"; |
| 638 | foreach my $conf (@arr) { |
| 639 | print STDERR " " , $conf; |
| 640 | } |
| 641 | print STDERR "\n"; |
| 642 | } |
| 643 | } |