[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [MiNT] GCC question

Helmut Karlowski wrote:
Am 17.11.2010, 00:07 Uhr, schrieb Vincent Rivière <vincent.riviere@freesbee.fr>:

If you try to call it with any other number of arguments, it the compilation will quickly fail at preprocessing stage.
This is what is happening to you, and why you are getting the error.

With Pure C, which use a different GemLib, objc_draw() is probably

Pure-C acts different:

It compiles without problems:

#define x(y)  (xy,y)
#define y(a,b,c,d)  (d,c,b,a)


while gcc complains.

I have looked into AHCC (pre.c #define X_REPAIR 1)
The following is the case:
Pure C expands macro's while collecting arguments.
If a argument is a macro name it is expanded before insertion.
Which is non standard. (But useful. And looks more obvious.)
See K&R second edition A12.3 page 230 second alinea:
"During collection, arguments are not macro-expanded."

The C standard is a bad standard, due to incompetent compiler
writers in the big firms. Clumsy code in existing compilers
has been promoted to 'standard' because already too many programs
were relying on the clumsinesses.

Groeten; Regards.
Henk Robbers. http://members.chello.nl/h.robbers
Interactive disassembler: TT-Digger;  http://digger.atari.org
A Home Cooked C compiler:      AHCC;  http://ahcc.atari.org