Colibri imx7D Uboot with version "3" and git branch "toradex_2019.07"

After i try to build U-Boot for imx7D with uboot version 3 and git branch toradex_2019.07 , I see that u-boot.imx
is not formed even after complete built up of image.Only “u-boot.bin” is formed after uboot image building process.

The regular make target nowadays builds u-boot-dtb.imx which is the new name from mainline. However, if you explicitly make u-boot.imx you should get that one as well actually being the exact same thing. Anyway, I agree that our documentation in this respect is rather lacking and we are in the process of updating it. Thanks for letting us know.