Re: your recent patch to cpplib.c

[Mark Mitchell <mark at codesourcery dot com>]

  I didn't see a gcc-patches message for this:

I apologize for that.  Our mail server was very badly behaved
yesterday -- it dropped outgoing mail without telling me!  I'm still
trying to figure out who got what.

I posted a test-case with the bug.  It was, I belive:

  #define f(x) x
  void g() {
    f 
      (3);
  }

The CPP output compressed `g' to one line.

  The right fix is not to use the mark at all in this context.  It's
  supposed to be for lookahead under extremely limited circumstances and
  this isn't one of them.  (And it will probably vanish entirely in the
  parser rewrite.)

  On the other hand, congratulations; you have probably found the line
  numbering bug I've been looking for for months.

Well, that's something.  I apologize for the bogus fix.  What should
we do at this point?

I've not got the time to do the complete fix, I don't think.  But, I
can certainly back out my change, or we can leave it in.  Let me know
what you would like.

And thanks for explaining this.

--
Mark Mitchell                   mark@codesourcery.com
CodeSourcery, LLC               http://www.codesourcery.com