cpp: handling of DOS newlines after line continuation backslashes?

[Zack Weinberg]

Matthias Klose wrote:
> How is cpp supposed to handle DOS newlines after line continuation
> backslashes on a *nix platform? 
> 
> #define a(b) (b*\^M
> b)
> main() {printf("%d\n", a(5));}
> 
> $ gcc foo.c
> foo.c:2: parse error before `)'
> foo.c:3: stray '\' in program
> 
> ^M denotes the char with ASCII code 13.  Without this char it works
> like it should.
> 
> $ gcc -E foo.c
> # 1 "foo.c"
> 
> b)
> main() {printf("%d\n", ( 5 *\ );}

Last time this came up, the consensus was that cpp should accept DOS
newlines on all platforms.  I implemented this in cpplib, but the
normal preprocessor may not do it yet.

zw