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

[ppluzhnikov at charter dot net]

------- Additional Comments From ppluzhnikov at charter dot net  2005-09-15 23:31 -------
The line '#0 <built-in>' causes trouble for other tools that work with 
the output from 'gcc -E'; e.g. edgcpfe refuses to parse it:

$ gcc -E - < /dev/null > junk.i && edgcpfe --c junk.i
"<stdin>", line 1: error: invalid line number
  # 0 "<built-in>"
    ^

1 error detected in the compilation of "junk.i".

What is the problem of emitting '#1 <built-in>' anyway?
Since neither corresponds to a "real" line number, it's not clear what
advantage '#0' has, especially if it is to be suppressed in the output.

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                 CC|                            |ppluzhnikov at charter dot
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21250