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Subject[PATCH 4/4] localmodconfig: Add debug environment variable LOCALMODCONFIG_DEBUG
From: Steven Rostedt <srostedt@redhat.com>

If the environment variable LOCALMODCONFIG_DEBUG is set, then debug output
will appear in the make localmodconfig. This will simplify debugging what
people get with their output, as I can just tell people to do:

LOCALMODCONFIG_DEBUG=1 make localmodconfig 2>out.txt

and have them send me the out.txt. I'll be able to see why things are not
working as they think it should be.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
scripts/kconfig/streamline_config.pl | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index fcfcb30..2fbbbc1 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -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`;
@@ -389,6 +399,7 @@ foreach my $module (keys(%modules)) {
my @arr = @{$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.
@@ -412,6 +423,8 @@ foreach my $line (@config_file) {

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
@@ -440,6 +453,7 @@ sub parse_config_depends
# 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 {
@@ -473,15 +487,18 @@ sub parse_config_selects

# 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;
}
@@ -506,6 +523,7 @@ sub parse_config_selects
$repeat = 1;
# Make this config need to be selected
$configs{$next_config} = 1;
+ dprint "$next_config selected by select $config\n";
}

my %process_selects;
@@ -526,6 +544,7 @@ sub loop_depend {
}

$config =~ s/^CONFIG_//;
+ $depconfig = $config;

if (defined($depends{$config})) {
# This config has dependencies. Make sure they are also included
@@ -546,6 +565,8 @@ 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_selects $config, $selects{$config};
}
--
1.7.10

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