bluez
1) download source tree of anroid donut from Google.
2) build android by 
  . build/envsetup.sh
  choosecombo (all default option, Product choices are: 2. generic)
  make -j4
3) replace external/bluez, and 'export BOARD_HAVE_BLUETOOTH=true'
4) mmm external/bluetooth/glib
   mmm external/bluetooth/bluez
-------------------------------------------------------------------------------
wpa_supplicant_6
1) download source tree of anroid froyo from Google.
2) build android by 
  . build/envsetup.sh
  choosecombo (all default option, Product choices are: 2. generic)
  make -j4
3) replace external/wpa_supplicant_6
4) mmm external/wpa_supplicant_6/wpa_supplicant
-------------------------------------------------------------------------------

kernel
1) download source tree of android froyo from nVidia.

2) edit android\vendor\nvidia\common\generate_init.mk
before:
    system_mount_mmc := /dev/block/mmcblk3p1
    cache_mount_mmc	:= /dev/block/mmcblk3p2
    misc_mount_mmc := /dev/block/mmcblk3p3
    userdata_mount_mmc += /dev/block/mmcblk3p6
after:
    system_mount_mmc := /dev/block/mmcblk3p3
    cache_mount_mmc	:= /dev/block/mmcblk3p4
    misc_mount_mmc := /dev/block/mmcblk3p5
    userdata_mount_mmc += /dev/block/mmcblk3p7

3) edit android\vendor\nvidia\common\init.rc
before:
    mount yaffs2 mtd@system /system
    mount yaffs2 mtd@system /system ro remount
    mount yaffs2 mtd@userdata /data nosuid nodev
    mount yaffs2 mtd@cache /cache nosuid nodev
    mount yaffs2 mtd@misc /misc nosuid nodev
after:
    mount ext2 /dev/block/mmcblk3p3 /system
    mount ext2 /dev/block/mmcblk3p3 /system ro remount
    mount ext3 /dev/block/mmcblk3p7 /data nosuid nodev
    mount ext3 /dev/block/mmcblk3p4 /cache nosuid nodev
    mount ext3 /dev/block/mmcblk3p5 /misc nosuid nodev

4) edit android\vendor\nvidia\common\TegraConfig.mk
before:
    BOARD_ROOT_DEVICE ?= nand
after:
    BOARD_ROOT_DEVICE ?= mmc
    
5) replace kernel

6) build kernel by 
  . build/envsetup.sh
choosecombo

Build for the simulator or the device?
     1. Device
     2. Simulator

Which would you like? [1] 1


Build type choices are:
     1. release
     2. debug

Which would you like? [1] 1


Which product would you like? [generic] harmony


Variant choices are:
     1. user
     2. userdebug
     3. eng
Which would you like? [eng] 3

  
7) make -j4 bootimage

-------------------------------------------------------------------------------