stdarg.h Syntax error

[Mark McLeod]

stdarg.h is included by stdio.h

It is simply the first true line of code the compiler encounters when #include <stdio.h> is used and it can recognize that an error has occurred. The error won't be in the system files, but in .c files you have touched.

Usually I've seen this when random characters are accidentally typed on the very first line of a .c file.
Take a look to see if anything has been typed BEFORE the
/******************
on the very top line of the .c files you've been modifying.