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

Jeremy Fitzhardinge
2008-05-24T21:14:29Z

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