Re: __attribute__((__unused__)) problem

[Akim Demaille]

Le 5 avr. 2013 à 14:00, victor khomenko <address@hidden> a écrit :

> I've recently updated to bison-2.7 and my code stopped compiling. The reason 
> is __attribute__((__unused__)) applied to yy_location_print_ - it fails to 
> compile in Visual Studio (the *.y file was compiled into *.cpp under Windows 
> using bison-2.7 coming with CYGWIN). The problematic code emitted by bison is 
> as follows (note that the attribute is not guarded by the _MSC_VER macro):
> 
> __attribute__((__unused__))
> #if (defined __STDC__ || defined __C99__FUNC__ \
>     || defined __cplusplus || defined _MSC_VER)
> static unsigned
> yy_location_print_ (FILE *yyo, YYLTYPE const * const yylocp)
> #else
> static unsigned
> yy_location_print_ (yyo, yylocp)
>    FILE *yyo;
>    YYLTYPE const * const yylocp;
> #endif
> {
> ...
> }

Hi Victor,

You are right, this is a serious issue :(  I will prepare a 2.7.1
asap.  Could you please help me making sure it works properly with
Microsoft compilers?  Actually, it would be nice if you could also
help me kill some compiler warnings.   Please, have a look at the
following message.

http://lists.gnu.org/archive/html/bug-bison/2013-03/msg00003.html

Thanks in advance!