Facing Promblem while programming ATMEGA328 U

I have purchased some ATMEGA328 U without bootloader but now facing problem to upload the program. in same setting i can upload ATMEGA328P-PU but now in india we are unable to get those ATMEGA328P-PU. so we purchase ATmega328 U. please tell me how to program those IC’s with ISP.

Install MCUdude's "miniCore", which has explicit support for the non-P ATmega328.