localmodconfig: Add debug prints for dependencies of module configs

When a config for a module is added to the list to save in the final
config file, add a print to show what dependencies are used. This is
useful to debug when a config is disabled by the make oldconfig after
localmodconfig is finished.

This print only appears if the environment variable LOCALMODCONFIG_DEBUG
is defined.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 33689396953a..343a56863660 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -396,6 +396,15 @@ foreach my $module (keys(%modules)) {
         foreach my $conf (@arr) {
             $configs{$conf} = $module;
             dprint "$conf added by direct ($module)\n";
+            if ($debugprint) {
+                my $c=$conf;
+                $c =~ s/^CONFIG_//;
+                if (defined($depends{$c})) {
+                    dprint " deps = $depends{$c}\n";
+                } else {
+                    dprint " no deps\n";
+                }
+            }
         }
     } else {
         # Most likely, someone has a custom (binary?) module loaded.