Messages in this thread |  | | From | Keith Owens <> | Date | Fri, 01 Sep 2000 15:56:40 +1100 |
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On Thu, 31 Aug 2000 21:44:16 -0700, Richard Henderson <rth@twiddle.net> wrote: >On Thu, Aug 31, 2000 at 07:09:00PM +1100, Keith Owens wrote: >> Compiling 2.4.0-test7 with the latest IA64 toolchain, gcc version >> 2.96-ia64-000717 snap 000828. It complained about various include >> files, "pasting would not give a valid preprocessing token", this >> version of gcc is a bit more paranoid about the use of '##'. > >> -#define dprintk(args...) dfprintk(FACILITY, ## args) >> +#define dprintk(args...) dfprintk(FACILITY, args) > >This one isn't. This is a gcc extension to remove the previous token >if "args" is empty. So you'd get > > dfprintk(FACILITY); >instead of > dfprintk(FACILITY, );
I know about that extension and I originally tried dfprintk(FACILITY , ##args) which is what gcc info recommends, but that still gave a warning message. Since this particular macro requires at least one argument (dprintk() and dfprintk(FACILITY) are meaningless), it was easier to remove the '##'.
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