From d092f888fb7271c9919eee397a4933df18b582e1 Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Thu, 20 Feb 2014 18:49:45 -0600
Subject: [PATCH] Add CONFIG_DEFAULT_SMALL that will select default values for
 configuration settings based upon either more features or smaller footprint. 
 Turns out not be be useful for modifying existing defconfig files because the
 defaults do not apply in that case

---
 ChangeLog     |  6 ++++++
 Kconfig       | 13 +++++++++++++
 fs/Kconfig    |  5 +++--
 sched/Kconfig |  8 +++++---
 4 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index ab2b470c7a..45c4e2a56b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -6635,4 +6635,10 @@
 	  CONFIG_DISABLE_PSEUDOFS_OPERATIONS that effectively can be set
 	  back out these recent changes in rmdir, mkdir, unlink, and rename
 	  for operations on the pseudo-filesystem (2014-2-20).
+	* Kconfig:  Add an option to select default values for configuration
+	  variables based upon whether you want a smaller footprint or more
+	  features.  CONFIG_DEFAULT_SMALL is used in sched/Kconfig and
+	  fs/Kconfig and in apps/.  It turns out this this is not very useful
+	  if you are modifying existing configurations because then the
+	  defaults do not apply (2014-2-20).
 
diff --git a/Kconfig b/Kconfig
index 1bf91e2a58..e4667d045d 100644
--- a/Kconfig
+++ b/Kconfig
@@ -21,6 +21,19 @@ menu "Build Setup"
 config EXPERIMENTAL
 	bool "Prompt for development and/or incomplete code/drivers"
 
+config DEFAULT_SMALL
+	bool "Default to smallest size"
+	default n
+	---help---
+		When options are present, the default value for certain options will
+		be the one the results in the smallest size (at a loss of featurs).
+		The default is a fuller feature set at a larger size.
+
+		NOTE: This option does not prevent you from overriding the default
+		to select another alternative.  Nor does it affect the settings that
+		have already been selected in your configuration file.  This applies
+		only to new settings that require a default value.
+
 choice
 	prompt "Build Host Platform"
 	default HOST_LINUX
diff --git a/fs/Kconfig b/fs/Kconfig
index defeba0111..b175276faf 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -10,8 +10,9 @@ config DISABLE_MOUNTPOINT
 	default n
 
 config DISABLE_PSEUDOFS_OPERATIONS
-	bool "Disable pseudo-filesytem operations"
-	default n
+	bool "Disable pseudo-filesystem operations"
+	default y if DEFAULT_SMALL
+	default n if !DEFAULT_SMALL
 	---help---
 		Disable certain operations on pseudo-file systems include mkdir,
 		rmdir, unlink, and rename.  These are necessary for the logical
diff --git a/sched/Kconfig b/sched/Kconfig
index f559246f1b..8aeda33eab 100644
--- a/sched/Kconfig
+++ b/sched/Kconfig
@@ -181,7 +181,7 @@ config JULIAN_TIME
 
 config START_YEAR
 	int "Start year"
-	default 2013
+	default 2014
 
 config START_MONTH
 	int "Start month"
@@ -353,7 +353,8 @@ config DISABLE_CLOCK
 config DISABLE_POSIX_TIMERS
 	bool "Disable POSIX timers"
 	depends on DISABLE_OS_API
-	default n
+	default y if DEFAULT_SMALL
+	default n if !DEFAULT_SMALL
 
 config DISABLE_PTHREAD
 	bool "Disable pthread support"
@@ -373,7 +374,8 @@ config DISABLE_MQUEUE
 config DISABLE_ENVIRON
 	bool "Disable environment variable support"
 	depends on DISABLE_OS_API
-	default n
+	default y if DEFAULT_SMALL
+	default n if !DEFAULT_SMALL
 
 if !DISABLE_SIGNALS
 comment "Signal Numbers"