Building basic booting code for C674 outside CCS

I am trying to boot the C674 in a TMDXEVM8148 evaluation board.  I can succesfully boot it using CCS and GEL files but what I am trying to achieve is to generate the files necessary (.c, .h, .obj) to include in an external build to create the out file (basically using the compiler/linker externally).  I think there are some basic xdc files that CCS generates with the basic boot information, but I don't know which ones to use. Any help?