Reduce memory usage in same AVR configurations

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3714 42af7a65-404d-4744-a932-0658087f49c3

configs/amber/hello/defconfig

@@ -270,12 +270,12 @@ CONFIG_DEBUG_SYMBOLS=n
 CONFIG_DEBUG_SCHED=n
 CONFIG_MM_REGIONS=1
 CONFIG_ARCH_LOWPUTC=y
-CONFIG_RR_INTERVAL=200
+CONFIG_RR_INTERVAL=0
 CONFIG_SCHED_INSTRUMENTATION=n
 CONFIG_TASK_NAME_SIZE=0
 CONFIG_START_YEAR=2011
-CONFIG_START_MONTH=4
-CONFIG_START_DAY=8
+CONFIG_START_MONTH=6
+CONFIG_START_DAY=16
 CONFIG_GREGORIAN_TIME=n
 CONFIG_JULIAN_TIME=n
 CONFIG_DEV_CONSOLE=y
@@ -325,10 +325,10 @@ CONFIG_SYMTAB_ORDEREDBYNAME=y
 #   up waiting tasks.
 #
 CONFIG_DISABLE_CLOCK=n
-CONFIG_DISABLE_POSIX_TIMERS=n
-CONFIG_DISABLE_PTHREAD=n
-CONFIG_DISABLE_SIGNALS=n
-CONFIG_DISABLE_MQUEUE=n
+CONFIG_DISABLE_POSIX_TIMERS=y
+CONFIG_DISABLE_PTHREAD=y
+CONFIG_DISABLE_SIGNALS=y
+CONFIG_DISABLE_MQUEUE=y
 CONFIG_DISABLE_MOUNTPOINT=y
 CONFIG_DISABLE_ENVIRON=y
 CONFIG_DISABLE_POLL=y
@@ -393,19 +393,19 @@ CONFIG_ARCH_BZERO=n
 #   timer structures to minimize dynamic allocations.  Set to
 #   zero for all dynamic allocations.
 #
-CONFIG_MAX_TASKS=16
+CONFIG_MAX_TASKS=4
 CONFIG_MAX_TASK_ARGS=4
-CONFIG_NPTHREAD_KEYS=4
-CONFIG_NFILE_DESCRIPTORS=8
-CONFIG_NFILE_STREAMS=8
+CONFIG_NPTHREAD_KEYS=0
+CONFIG_NFILE_DESCRIPTORS=4
+CONFIG_NFILE_STREAMS=4
 CONFIG_NAME_MAX=32
-CONFIG_STDIO_BUFFER_SIZE=256
-CONFIG_NUNGET_CHARS=2
-CONFIG_PREALLOC_MQ_MSGS=4
-CONFIG_MQ_MAXMSGSIZE=32
+CONFIG_STDIO_BUFFER_SIZE=0
+CONFIG_NUNGET_CHARS=0
+CONFIG_PREALLOC_MQ_MSGS=0
+CONFIG_MQ_MAXMSGSIZE=0
 CONFIG_MAX_WDOGPARMS=2
 CONFIG_PREALLOC_WDOGS=4
-CONFIG_PREALLOC_TIMERS=4
+CONFIG_PREALLOC_TIMERS=0
 
 #
 # Filesystem configuration