makefile:41: *** missing separator. Stop.

I am using Cyclone 5 FPGA board to boot from QSPI

I am trying to run the Makefile using the command "make" but I am getting an error as "missing separator".I have tried the commands $vim Makefile followed by :

%s/^[ ]\+/^I/

I have checked for spaces using the command

$cat -e -t -v makefile

The spaces are removed but the Makefile still does'nt run when run using make command

Can anyone please provide solution for the same?