[PATCH v3] arch: Kconfig: Let all architectures set endian explicitly
Max Filippov
jcmvbkbc at gmail.com
Fri Aug 15 11:47:15 EST 2014
Hi Chen,
On Thu, Aug 14, 2014 at 8:54 PM, Chen Gang <gang.chen.5i5j at gmail.com> wrote:
> Normal architectures:
>
> - Big endian: avr32, frv, m68k, openrisc, parisc, s390, sparc
>
> - Little endian: alpha, blackfin, cris, hexagon, ia64, metag, mn10300,
> score, unicore32, x86
>
> - Choose in config time: arc, arm, arm64, c6x, m32r, mips, powerpc, sh
>
> Special architectures:
>
> - Deside by compiler: microblaze, tile, xtensa.
>
> - Deside by building host: um
>
> - Next, need improve Kbuild to probe endian to deside whether need mark
> __BUILDING_TIME_BIG_ENDIAN__ before real config.
[...]
> diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
> index 3a617af..a3e8f7e 100644
> --- a/arch/xtensa/Kconfig
> +++ b/arch/xtensa/Kconfig
> @@ -22,6 +22,8 @@ config XTENSA
> select HAVE_IRQ_TIME_ACCOUNTING
> select HAVE_PERF_EVENTS
> select COMMON_CLK
> + select CPU_BIG_ENDIAN if __BUILDING_TIME_BIG_ENDIAN__
> + select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN
> help
> Xtensa processors are 32-bit RISC machines designed by Tensilica
> primarily for embedded systems. These processors are both
I've tested this part and it doesn't select neither CPU_BIG_ENDIAN,
nor CPU_LITTLE_ENDIAN. And looking into the Kconfig/Kbuild I cound't
find anything related to __BUILDING_TIME_BIG_ENDIAN__. Am I missing
something?
--
Thanks.
-- Max
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