Re: [Sdcc-user] Another compiler glitch: Is 'data' a pre-defined keyword?

[Gordon H. <gor...@dr...>]

On Mon, 16 Nov 2009, Raphael Neider wrote:

> Hi,
>
>> This (contrived example) fails to compile:
>>
>>    void test (int data)
>>    {
>>      int i ;
>>      i = data ;
>>    }
>>
>> Compile command:
>>
>>    sdcc  -mpic16 -p18f4685 -c test.c
>>
>> Gives:
>>
>>    test.c:5: syntax error: token -> 'data' ; column 10
>>    test.c:6: error 159: in function test: name omitted for parameter 1
>>
>> Compiles fine with gcc, so wondering if 'data' is pre-defined as a
>> keyword somewhere?
>
> Yes, "data" is a memory space indicator (like code, idata, pdata,
> xdata, and more).
> You can compile with --std-c89, which defines only the variants
> __data, __code, __idata, __pdata, __xdata, ... as keywords and allows
> you to use the non-__-prefixed ones as regular identifiers.

Interesting.

Of-course, I've now found some references to it in the manual - problem 
is, it's in the sections headed with other processor types and not in the 
PIC16 section, so I'd not bothered to read it before...

My experiences so-far is that SDCC is a very capable PIC code generator, 
my project's compiling to about 50KB of Flash and I've more to go yet... 
it's just the documentation that's somewhat lacking.

I suspect that's just the way it's been over time, rather than by design!

Thanks,

Gordon