[RFC][PATCH 1/2] localmodconfig: Add config depends by default settings

[Steven Rostedt]

From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx>

Currently localmodconfig will miss dependencies from the default option.
For example:

config FOO
	default y if BAR || ZOO

If FOO is needed for a module and is set to '=m', and so are BAR or ZOO,
localmodconfig will not see that BOO or ZOO are also needed for the foo
module, and will incorrectly disable them.

Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 scripts/kconfig/streamline_config.pl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 4606cdf..3133172 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -219,6 +219,13 @@ sub read_kconfig {
 	    $depends{$config} = $1;
 	} elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
 	    $depends{$config} .= " " . $1;
+	} elsif ($state eq "DEP" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) {
+	    my $dep = $3;
+	    if ($dep !~ /^\s*(y|m|n)\s*$/) {
+		$dep =~ s/.*\sif\s+//;
+		$depends{$config} .= " " . $dep;
+		dprint "Added default depends $dep to $config\n";
+	    }
 
 	# Get the configs that select this config
 	} elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
-- 
1.8.4.3


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