kconfig: Check for if conditions in Kconfig for localmodconfig

The streamline_config.pl misses the if conditions for checking
dependencies. For Kconfigs with the following construct:

 if MEDIA_SUPPORT

 config VIDEO_DEV

 [...]

If VIDEO_DEV was enabled, the script will miss the fact that MEDIA_SUPPORT
is also needed.

This patch changes streamline_config.pl to include if conditions into
the dependencies of configs.

Reported-by: Anton Blanchard <anton@sambo.org>
Tested-by: Anton Blanchard <anton@sambo.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 0d800820c3cd..9e66fa8dc52e 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -121,6 +121,8 @@ my %prompts;
 my %objects;
 my $var;
 my $cont = 0;
+my $iflevel = 0;
+my @ifdeps;
 
 # prevent recursion
 my %read_kconfigs;
@@ -146,6 +148,15 @@ sub read_kconfig {
             $state = "NEW";
             $config = $1;
 
+            for (my $i = 0; $i < $iflevel; $i++) {
+                if ($i) {
+                    $depends{$config} .= " " . $ifdeps[$i];
+                } else {
+                    $depends{$config} = $ifdeps[$i];
+                }
+                $state = "DEP";
+            }
+
         # collect the depends for the config
         } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
             $state = "DEP";
@@ -166,6 +177,21 @@ sub read_kconfig {
             # note if the config has a prompt
             $prompt{$config} = 1;
 
+        # Check for if statements
+        } elsif (/^if\s+(.*\S)\s*$/) {
+            my $deps = $1;
+            # remove beginning and ending non text
+            $deps =~ s/^[^a-zA-Z0-9_]*//;
+            $deps =~ s/[^a-zA-Z0-9_]*$//;
+
+            my @deps = split /[^a-zA-Z0-9_]+/, $deps;
+
+            $ifdeps[$iflevel++] = join ':', @deps;
+
+        } elsif (/^endif/) {
+
+            $iflevel-- if ($iflevel);
+
         # stop on "help"
         } elsif (/^\s*help\s*$/) {
             $state = "NONE";