compilation for files > 2Gb

[Zack Weinberg]

On Thu, Jan 25, 2001 at 11:51:43AM -0800, Joe Buck wrote:
> [ problems with gcc reading multi-gigabyte files because of mmap issues ]
> 
> Zack writes:
> > Honestly, I cannot think of a legitimate reason why anyone would need
> > a C(++) source file that large.  I could be persuaded otherwise with
> > an example, but until one arises, I don't see any need to support them
> > in GCC.
> 
> I agree, there are certainly more pressing problems.  However, if we
> aren't going to support it, ideally GCC should produce a message
> describing the problem ("File foobar.h is too large to be mapped into
> memory" or some such) rather than just fail mysteriously.

We do:

      if (inc->st.st_size > INTTYPE_MAXIMUM (ssize_t))
	{
	  cpp_error (pfile, "%s is too large", inc->name);
	  goto fail;
	}
      size = inc->st.st_size;

Perhaps the message could be made clearer.  At the time I didn't feel
there was any need to explain the reason it isn't supported to the
user.  (There's a long comment in the source, though.)

zw