Re: [PATCH 01/25] asm-generic: Change time_t and clock_t to 64 bit

Geert Uytterhoeven
2014-05-13T13:11:36Z

On Tue, May 13, 2014 at 2:07 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Tue, 13 May 2014, Arnd Bergmann wrote:
>> On Tuesday 13 May 2014 18:17:40 Ley Foon Tan wrote:
>> > When we export this posix_types.h file for user software, they need to
>> > define this config, eg: CONFIG_32BIT_TIME to use 32 bit time. Is this
>> > what we want to do?
>>
>> No, this doesn't really work: You can't use CONFIG_* symbols in
>> user-visible header files.
>
> Then make the config symbol generate the header from a template.

Indeed. I think it's worthwhile to add CONFIG_* expansion for such "hard"
CONFIG symbols to make headers_install, cfr. the existing unifdef support.

We do such a hard work to improve asm-generic, so new architectures can
just use that, only to see early adaptors now having to migrate away from it
(e.g. OpenRISC suddenly gaining uapi/asm/posix_types.h).

Or is there another solution?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds