Re: [RFC PATCH] kconfig: introduce KCONFIG_* symbols for .c files

[Jeremy Fitzhardinge <jeremy@goop.org>]

Adrian Bunk wrote:
> On Sat, May 24, 2008 at 09:58:47PM +0100, Jeremy Fitzhardinge wrote:
>   
>> Would
>>
>>    #define KCONFIG(x)   (CONFIG_##x - 0)
>>
>>    if (KCONFIG(PREEMPT)) {
>>        ...
>>    }
>>
>> work?
>>     
>
> $ cat test.c
> #define KCONFIG(x)   (CONFIG_##x - 0)
>
> int main()
> {
>   if (KCONFIG(PREEMPT))
>     ;
>
>   return 0;
> }
> $ gcc -O2 -Wall test.c
> test.c: In function ‘main’:
> test.c:5: error: ‘CONFIG_PREEMPT’ undeclared (first use in this function)
> test.c:5: error: (Each undeclared identifier is reported only once
> test.c:5: error: for each function it appears in.)
>   

You and your scientific method.

Yeah, this is one of those cases where you need cpp to rescan its input 
after pasting, and I don't think it will ever do that.

    J