[U-Boot] Uboot build system question

Hi all, I had a question regarding uboot build system. One starts a build for platform1 and without cleaning tree builds for platform2, what is the expected result? make <platform1>_config make <platform2>_config

Is the final product build of platform2 or goes to inconsistent state or implementation dependent? In linux kernel, all dependencies are rebuilt and we expect build for the 2nd defconfig.

Thanks, Bharath