[Bug preprocessor/21250] [4.1 Regression] line number 0 for <built-in> causes GAS to complain

[bothner at gcc dot gnu dot org]

------- Additional Comments From bothner at gcc dot gnu dot org  2005-04-28 23:59 -------
Re comment #2:

I don't believe the text you quoted from the C standard is relevant.
<built-in> is not a "source file".

While the C standard isn't directly relevant to Gas, a relevant issue
is what the C standard says of #line directives: Should a C compiler
complain if it sees a line number zero in a #line directive?  Note this
is directly answered by your quotation.

But rather than argue standards, my inclination would be to use zero
as the pseudo-line-number of <built-in> declarations, but suppress the
output of the # 0 <built-in> in preprocessor output.  This will have to
be discussed on the gcc/gcc-patches mailing list (after I get back home).

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21250