This is a basic configuration for building recovery rom for Galaxy Tab 4 7.0 (degaswifi). Notable things about it:
- You can find out here how the boot image header is different from the standard Android header which is why standard tools fail to unpack its boot images. Therefore you'd have to use this custom mkbootimg by Ketut P. Kumajaya to create the recovery image.
In BoardConfig.mk it's set by
BOARD_CUSTOM_MKBOOTIMG := degas-mkbootimgChange that to point to the correct path - The device uses v2 recovery.fsab. I've converted to v1 so it's compatible with twrp
- I had to supply the device tree table which I have extracted from the stock rom, BoardConfig.mk has that defined as
BOARD_MKBOOTIMG_ARGS := --dt device/samsung/degaswifi/recovery.img-dt
Feel free to fork and submit any changes