preprocessor/21250 and address of <built-in>

[Segher Boessenkool]

> Opinions on how to handle this bug?
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21250

a) don't print the <built-in> line; or
b) output its line number as 1; or
c) fix its line number (internally) as 1.

c) seems cleanest to me, but I don't really care.

> This is especially
> an issue for people who use cpp to preprocessor assembler, which
> of course we don't really support.

Strangely enough it is in the documentation, though (see invoke.texi).

> Objections to this approach?  Other suggestions?  One alternative is
> to fix gas to not complain about line number 0.

No complaints.  But note that gas is *right* with complaining about it.


Segher