I've build uboot, kernel, and rootfs images(using bitbake commands) and success bring up on the Yocto board, but i meet some issue on toolchain and native library when not to use bitbake commands...
Any suggestion to solve these conflicts between toolchain and linux native library and headers
for changing image one can look at
for build steps, toolchain one can follow documentation : i.MX Yocto Project User’s Guide
and post specific yocto question on meta-fsl-arm mailing list