Re: [Tinycc-devel] Preprocess enter an endless loop when use macro with line feed

[Marc Andre Tanner]

Hi,

On Fri, Nov 23, 2007 at 09:15:12AM +0800, Feng Nauh wrote:
> for example:
> 
> // lf_macro.c
> #define M(a,b) (a+b)
> int main() {
>     return M(1,
>                  2);
> }
> 
> "tcc -E lf_macro.c", then tcc enter an endless loop; but compile is ok.

Yep, the problem seems to be that within tcc_preprocess parse_flags is
ORed with PARSE_FLAG_LINEFEED this causes an endless loop in
macro_subst_tok (line 3268) because next_nomacro will always set tok to
TOK_LINEFEED.

There is a debian bug report[1] with a similar porblem but the mentioned
patch looks a bit bogus to me. Attached is my workaround.

Marc

[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=435027

-- 
 Marc Andre Tanner >< http://www.brain-dump.org/ >< GPG key: CF7D56C0

preprocessor-newline.patch
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