Auto-testing issue on FreeBSD

[Jeremy DeHaan via Digitalmars-d]

Hey All. I'm trying to track down an auto-tester failure on 
FreeBSD, so I decided to run the same tests myself locally. I 
encountered the following error:

runnable/extra-files/cppb.cpp:297:37: error: 'va_list' has not 
been declared
  void myvprintfx(const char* format, va_list);

I added #include <cstdarg> to the file, and then everything ran 
fine. Should I have set up my system differently so that I didn't 
need to edit anything or should this be added to the file anyway?

    Jeremy