However, the last step and most exciting step has something wrong.

root@OpenWrt:~# opkg install helloworld_1_brcm47xx.ipk
Collected errors:
* pkg_hash_fetch_best_installation_candidate: Packages for helloworld found, but incompatible with the architectures configured
* opkg_install_cmd: Cannot install package helloworld.
root@OpenWrt:~#
The Detial Enviorment information is follows:
(1)My downloaded OpenWrt Source: svn co svn://svn.openwrt.org/openwrt/trunk/
(2)Target Device:
WRT54GS v3.0
uanme -a:
Linux OpenWrt 2.4.37.9 #12 Fri Apr 2 18:58:12 CEST 2010 mips GNU/Linux
BusyBox v1.15.3 (2010-03-28 18:22:11 CEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.
_______ ________ __
| |.-----.-----.-----.| | | |.----.| |_
| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
BackFire (10.03-rc3, r20653) ----------------------
* 1/3 shot Kahlua In a shot glass, layer Kahlua
* 1/3 shot Bailey's on the bottom, then Bailey's,
* 1/3 shot Vodka then Vodka.
---------------------------------------------------
(3)My Build System:
Linux localhost 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
(4)Make menuconfig:
3 3 Target System (Broadcom BCM947xx/953xx) --->
3 3 Target Profile (Broadcom BCM43xx WiFi (b43, default)) --->
3 3 Target Images --->
3 3 Global build settings --->
3 3 [*] Advanced configuration options (for developers) ---> [/b]
3 3 [ ] Build the OpenWrt Image Builder
3 3 [*] Build the OpenWrt [/b]SDK
3 3 [ ] Build the OpenWrt based Toolchain
3 3 [ ] Image configuration --->
(5)My Builded SDK:
OpenWrt-SDK-brcm47xx-for-Linux-x86_64-gcc-linaro_uClibc-0.9.32.tar.bz2
(6)My Produced helloword ipkg with my SDK:
helloworld_1_brcm47xx.ipk
(7)root@OpenWrt:~# opkg print-architecture
arch all 1
arch noarch 1
arch brcm-2.4 10
root@OpenWrt:~#
Sincerely hope warmhearted angel can help me~
CheeWii