Hi all,
I have a problem with the Sun Studio Express C pre-processor handling
variadic macros. Look at the following code example:
> 1 #define OSIF_WARN( fmt, args... ) osif_warn(fmt, ## args)
> 2
> 3 void osif_warn(char *fmt, ... )
> 4 {
> 5 }
> 6
> 7 int main (void)
> 8 {
> 9 osif_warn("%s", "bla");
> 10 OSIF_WARN("%s", "bla");
> 11 osif_warn("blu");
> 12 OSIF_WARN("blu");
> 13 return 0;
> 14 }
The pre-processor throws a warning: "varargs.c", line 12: warning:
argument mismatch
Although, the code the pre-processor (cc -E) generates looks good!
> int main (void)
> {
> osif_warn("%s", "bla");
> osif_warn ( "%s" , "bla" );
> osif_warn("blu");
> osif_warn ( "blu" );
> return 0;
> }
Why does the sun-cpp generate a warning even though the code looks good?
It seems that the sun-cpp is not able to handle variable argument lists
with zero entries! Is this a bug then?
I am using cc: Sun Ceres C 5.10 SunOS_i386 2008/04/04 of the
"sunstudioexpress" package for OpenSolaris 2008.05.
Regards,
Christian
--
Christian Kaiser, Software Engineer, Dolphin Interconnect Solutions
http//www.dolphinics.com
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