The code looks good, there seems to be some surprises with files that use "#include <stdio.h>" or similar. The include-lines are the ones the errors refer to -

The code looks good, there seems to be some surprises with files that use "#include <stdio.h>" or similar. The include-lines are the ones the errors refer to - but since those files come with the compiler distribution I'd have expected their contents to be well-formed. I removed the includes from a few files, changed FILEs to ints, and added "#define EOF -1", etc, which let some more simple code compile & link. But it felt like those changes shouldn't have been necessary. I guess the good news is the compiler ran without me having to add any new CP/M syscalls/bdos functions to my emulator - unlike hisoft which required that I implement "T_GET" (Get date and time) and a couple of other functions I'd been missing such as F_SIZE (For getting a file size).