`Cpp: 'ICOM_FN(##xfn)' generates a warning :-(

[Alexandre Oliva]

On Jan  2, 2001, Francois Gouget <fgouget@free.fr> wrote:

> #define DECLARE2(xfn)    void ICOM_FN(##xfn) (void);

This doesn't produce a valid token after token pasting.  CVS GCC is
correct in warning about it.

I think an ISO C-compliant solution would be to define DECLARE2 so
that it takes an additional empty argument, and use token pasting to
paste this empty argument to the symbol name.

#define DECLARE2(xfn,empty) void ICOM_FN(empty ## xfn) (void);

DECLARE2(GetObject,)


The alternative I see to preserve the interface of DECLARE2 is to not
use ICOM_FN, but instead concatenate fn with xfn explicitly.

I don't know if any of these are viable alternatives for Wine.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                  aoliva@{cygnus.com, redhat.com}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist    *Please* write to mailing lists, not to me