Merge tag 'localmodconfig-v3.6' of... (f6bcfc9d) · Commits · 戴 / test

scripts/kconfig/streamline_config.pl

+158 −17

Original line number	Diff line number	Diff line
		@@ -45,6 +45,16 @@
		use strict;
		use Getopt::Long;

		# set the environment variable LOCALMODCONFIG_DEBUG to get
		# debug output.
		my $debugprint = 0;
		$debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG}));

		sub dprint {
		return if (!$debugprint);
		print STDERR @_;
		}

		my $config = ".config";

		my $uname = `uname -r`;
		@@ -113,6 +123,10 @@ sub find_config {

		find_config;

		# Read in the entire config file into config_file
		my @config_file = <CIN>;
		close CIN;

		# Parse options
		my $localmodconfig = 0;
		my $localyesconfig = 0;
		@@ -186,6 +200,7 @@ sub read_kconfig {
		$state = "NEW";
		$config = $2;

		# Add depends for 'if' nesting
		for (my $i = 0; $i < $iflevel; $i++) {
		if ($i) {
		$depends{$config} .= " " . $ifdeps[$i];
		@@ -204,10 +219,11 @@ sub read_kconfig {

		# Get the configs that select this config
		} elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
		if (defined($selects{$1})) {
		$selects{$1} .= " " . $config;
		my $conf = $1;
		if (defined($selects{$conf})) {
		$selects{$conf} .= " " . $config;
		} else {
		$selects{$1} = $config;
		$selects{$conf} = $config;
		}

		# configs without prompts must be selected
		@@ -250,6 +266,7 @@ if ($kconfig) {
		read_kconfig($kconfig);
		}

		# Makefiles can use variables to define their dependencies
		sub convert_vars {
		my ($line, %vars) = @_;

		@@ -293,6 +310,7 @@ foreach my $makefile (@makefiles) {

		my $objs;

		# Convert variables in a line (could define configs)
		$_ = convert_vars($_, %make_vars);

		# collect objects after obj-$(CONFIG_FOO_BAR)
		@@ -373,13 +391,15 @@ while (<LIN>) {
		close (LIN);

		# add to the configs hash all configs that are needed to enable
		# a loaded module.
		# a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o
		# where we know we need bar.o so we add FOO to the list.
		my %configs;
		foreach my $module (keys(%modules)) {
		if (defined($objects{$module})) {
		my @arr = @{$objects{$module}};
		foreach my $conf (@arr) {
		$configs{$conf} = $module;
		dprint "$conf added by direct ($module)\n";
		}
		} else {
		# Most likely, someone has a custom (binary?) module loaded.
		@@ -387,9 +407,24 @@ foreach my $module (keys(%modules)) {
		}
		}

		# Read the current config, and see what is enabled. We want to
		# ignore configs that we would not enable anyway.

		my %orig_configs;
		my $valid = "A-Za-z_0-9";

		foreach my $line (@config_file) {
		$_ = $line;

		if (/(CONFIG_[$valid]*)=(m\|y)/) {
		$orig_configs{$1} = $2;
		}
		}

		my $repeat = 1;

		my $depconfig;

		#
		# Note, we do not care about operands (like: &&, \|\|, !) we want to add any
		# config that is in the depend list of another config. This script does
		@@ -398,7 +433,7 @@ 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) = @_;

		@@ -409,10 +444,16 @@ sub parse_config_dep_select

		$p =~ s/^[^$valid]*[$valid]+//;

		# We only need to process if the depend config is a module
		if (!defined($orig_configs{$conf}) \|\| !$orig_configs{conf} eq "m") {
		next;
		}

		if (!defined($configs{$conf})) {
		# We must make sure that this config has its
		# dependencies met.
		$repeat = 1; # do again
		dprint "$conf selected by depend $depconfig\n";
		$configs{$conf} = 1;
		}
		} else {
		@@ -421,31 +462,132 @@ sub parse_config_dep_select
		}
		}

		# 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) = @_;

		my $next_config;

		while ($p =~ /[$valid]/) {

		if ($p =~ /^[^$valid]*([$valid]+)/) {
		my $conf = "CONFIG_" . $1;

		$p =~ s/^[^$valid]*[$valid]+//;

		# Make sure that this config exists in the current .config file
		if (!defined($orig_configs{$conf})) {
		dprint "$conf not set for $config select\n";
		next;
		}

		# Check if something other than a module selects this config
		if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") {
		dprint "$conf (non module) selects config, we are good\n";
		# we are good with this
		return;
		}
		if (defined($configs{$conf})) {
		dprint "$conf selects $config so we are good\n";
		# A set config selects this config, we are good
		return;
		}
		# Set this config to be selected
		if (!defined($next_config)) {
		$next_config = $conf;
		}
		} else {
		die "this should never happen";
		}
		}

		# If 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;
		dprint "$next_config selected by select $config\n";
		}

		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_//;
		$depconfig = $config;

		if (defined($depends{$config})) {
		# This config has dependencies. Make sure they are also included
		parse_config_dep_select $depends{$config};
		parse_config_depends $depends{$config};
		}

		if (defined($prompts{$config}) \|\| !defined($selects{$config})) {
		next;
		# 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_//;

		dprint "Process select $config\n";

		# 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
		# we could not find a reason to keep enabled.
		while(<CIN>) {
		foreach my $line (@config_file) {
		$_ = $line;

		if (/CONFIG_IKCONFIG/) {
		if (/# CONFIG_IKCONFIG is not set/) {
		@@ -473,7 +615,6 @@ while(<CIN>) {
		}
		print;
		}
		close(CIN);

		# Integrity check, make sure all modules that we want enabled do
		# indeed have their configs set.

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