Which image I must using with Qt5, because Angstrom-lxde-imge with adding Qt layers have 240MB? I need system without graphics interface, only for running Qt program.
Note due to Bootloader, kernel and device tree, potential bad blocks and UBI overhead (the raw NAND filesystem) only about 110MB are usable.
Furthermore, by default our scripts use fdt_addr_r which is at 0x82000000, so 32MB are actually lost due to that offset. Also the last 9MB are used by U-Boot. So the default scripts allow to load a maximum UBI image size of about 87MB.
We currently do not have a Qt5 image which is optimized for VF50. You would have to adjust the image manually e.g. by removing packages/features…