diff options
Diffstat (limited to 'scripts/kconfig/streamline_config.pl')
| -rw-r--r-- | scripts/kconfig/streamline_config.pl | 115 |
1 files changed, 104 insertions, 11 deletions
diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl index ab4985f7af79..fcfcb302b0d7 100644 --- a/scripts/kconfig/streamline_config.pl +++ b/scripts/kconfig/streamline_config.pl @@ -420,7 +420,7 @@ my $repeat = 1; # to keep on. If A was on in the original config, B would not have been # and B would not be turned on by this script. # -sub parse_config_dep_select +sub parse_config_depends { my ($p) = @_; @@ -448,26 +448,119 @@ sub parse_config_dep_select } } -while ($repeat) { - $repeat = 0; +# Select is treated a bit differently than depends. We call this +# when a config has no prompt and requires another config to be +# selected. We use to just select all configs that selected this +# config, but found that that can balloon into enabling hundreds +# of configs that we do not care about. +# +# The idea is we look at all the configs that select it. If one +# is already in our list of configs to enable, then there's nothing +# else to do. If there isn't, we pick the first config that was +# enabled in the orignal config and use that. +sub parse_config_selects +{ + my ($config, $p) = @_; - foreach my $config (keys %configs) { - $config =~ s/^CONFIG_//; + my $next_config; + + while ($p =~ /[$valid]/) { + + if ($p =~ /^[^$valid]*([$valid]+)/) { + my $conf = "CONFIG_" . $1; + + $p =~ s/^[^$valid]*[$valid]+//; - if (defined($depends{$config})) { - # This config has dependencies. Make sure they are also included - parse_config_dep_select $depends{$config}; + # Make sure that this config exists in the current .config file + if (!defined($orig_configs{$conf})) { + next; + } + + # Check if something other than a module selects this config + if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") { + # we are good with this + return; + } + if (defined($configs{$conf})) { + # A set config selects this config, we are good + return; + } + # Set this config to be selected + if (!defined($next_config)) { + $next_config = $conf; + } + } else { + die "this should never happen"; } + } - if (defined($prompts{$config}) || !defined($selects{$config})) { - next; + # If no possible config selected this, then something happened. + if (!defined($next_config)) { + print STDERR "WARNING: $config is required, but nothing in the\n"; + print STDERR " current config selects it.\n"; + return; + } + + # If we are here, then we found no config that is set and + # selects this config. Repeat. + $repeat = 1; + # Make this config need to be selected + $configs{$next_config} = 1; +} + +my %process_selects; + +# loop through all configs, select their dependencies. +sub loop_depend { + $repeat = 1; + + while ($repeat) { + $repeat = 0; + + forloop: + foreach my $config (keys %configs) { + + # If this config is not a module, we do not need to process it + if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") { + next forloop; + } + + $config =~ s/^CONFIG_//; + + if (defined($depends{$config})) { + # This config has dependencies. Make sure they are also included + parse_config_depends $depends{$config}; + } + + # If the config has no prompt, then we need to check if a config + # that is enabled selected it. Or if we need to enable one. + if (!defined($prompts{$config}) && defined($selects{$config})) { + $process_selects{$config} = 1; + } } + } +} + +sub loop_select { + + foreach my $config (keys %process_selects) { + $config =~ s/^CONFIG_//; # config has no prompt and must be selected. - parse_config_dep_select $selects{$config}; + parse_config_selects $config, $selects{$config}; } } +while ($repeat) { + # Get the first set of configs and their dependencies. + loop_depend; + + $repeat = 0; + + # Now we need to see if we have to check selects; + loop_select; +} + my %setconfigs; # Finally, read the .config file and turn off any module enabled that |