I have used OpenWrt-SDK-Linux-i686-1 for compiling/building an iozone package for wrt54g router
The problem is that at the end .ipk is not formed.
I did the following :
1) Using BuildingPackages HowTo I managed to create the environment and successfully compile strace which is one of the examples.
2) Then i tried compiling iozone3_260
3) by building ouw own makefile and doing the required steps as mentioned in the docs it compiled but the .ipk was not formed