cpp seems not to include # line "file" output for empty files

[Neil Booth]

Daniel Berlin wrote:-

> Really?
> That's actually pretty surprising.
> I've always just used 2 regexes to scan for #include's, and generate
> the tree that way.
> Is there a particular reason this isn't a good solution that i should
> be aware of?

I don't think that would work very well:

o You would have false dependencies from #includes in skipped
conditional blocks.

o You cannot handle #include MACRO, which does occur in e.g. the
XFree86 code.

You really need to be the preprocessor to get the right dependencies.

Neil.